KR20190055392A - Precast mold for platform on piles system and concrete slab track construction method therewith - Google Patents

Abstract

In the construction of the concrete track by using pile, pillar, and platform support pile, it is not necessary to collect the formwork while making it possible to compose the lower roadbed around the crossbar while constructing the platform, thus improving the workability and efficiency. The present invention relates to a precast formwork and a concrete track construction method using the precast formwork, wherein the precast concrete formwork for a track support pile comprises a longitudinal precast wall panel extending longitudinally between upper and lower surfaces of a track support pile; And a transverse precast wall panel extending transversely to the upper side of the cross bar and having longitudinal end walls and end portions assembled with each other.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a precast concrete formwork for pile support,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast formwork for a track support pile and a concrete track construction method using the same. More specifically, in constructing a concrete track using pile support, pile support, pile support and pile support (track support pile), it is possible to construct the platform and collect the pile while making the lower roadbed pile around the pile. The present invention relates to a precast concrete form for a pile supported on a track, and a method of constructing a concrete track using the same.

In the case of a concrete track, which is a kind of railway track, the track itself is made of a continuous rigid body, so that uneven settlement of the roadbed caused by the soft ground affects the orbits themselves, thereby stopping train travel.

If the settlement occurs in such a concrete track, the concrete track must be reworked or an expensive reinforcing method is applied. In particular, since the allowable residual settlement is strictly limited to 30 mm or less, Shall be applied to keep the settlement amount below the reference value.

However, when the soft ground is thick or the soil is high, the construction cost is excessively applied, which makes it difficult to apply.

Therefore, it is possible to prevent the subsidence and uneven settlement of the subsurface layer or the lower slope layer by installing the drilled pile to the subsurface layer without any additional reinforcement or treatment (such as subsidence promotion method or subsidence suppression method) in the subsurface layer. The concrete track structure using piles has been introduced so that it can be mitigated and the construction cost can be reduced and simple maintenance can be performed in case of additional settlement.

FIG. 1A shows a concrete track structure using such a conventional pile.

That is, the tip of the pile 10 is located in the ground layer 3 or the bedrock layer 4 below the concrete track 20, and the head of the pile 10 is located on the lower bedrock 2) the pile 10 is installed so as to be exposed to the upper surface,

The concrete track 20 and the pile 10 are integrally moved by placing the HSB layer 22 on the head of the pile 10 and the rail 25 to form the concrete track 20, (20) is reinforced.

The HSB layer 22 is a concrete reinforced concrete slab layer, which is made of concrete. The concrete is embedded in the pile 10 to cover the pile cap 11,

A TCL layer 23 is formed on the HSB layer 22 and a reinforced concrete structure 23 is formed on the TCL layer 23. A tie rail 24 and a rail 25 are fixed to the TCL layer 23, As shown in FIG.

In this case, when the ground layer 3 is a soft ground, the load acting on the concrete track is transmitted to the bedrock layer 4 through the pile 10, thereby preventing settlement when the concrete track is constructed on the soft ground It can be said that

Recently, a track support pile has been introduced to solve the settlement problem of concrete track in soft ground.

The track support pile is a method for fundamentally restraining long-term settlement by directly transferring an upper load such as a train and a track supported through the platform 30 to the bedrock layer 4 through the pile 10. As a result, Compared with the ground replacement method, it has advantages such as shortening of air, securing of stability, simplification of design and construction procedure, and excellent economy.

That is, as shown in FIG. 1B, a cross beam 30 is installed on the head of the pile 10, and a platform 40 is further installed on the upper surface of the cross beam 30. On the upper surface of the platform 40, The HSB layer or the PCL layer 51 and the TCL layer 52 as described above are applied.

At this time, the platform 40 can be constructed in the form of a rectangular reinforced concrete plate, the width is about 1M, the longitudinal length is about 10 to 30M, and the beam 30 is also a reinforced concrete beam, , The width and thickness are about 1M, and it is common to apply the cast concrete to the site by using the steel formwork in the field considering its own weight.

However, in the case of constructing the platform (40, platform) by installing the steel form on the beam (30, cross beam), the compaction failure (B) occurs on the lower part of the platform, However,

It has been pointed out that there is a problem that the steel form applied to the lower part of the platform can not be recovered when the steel form is installed after compaction up to the upper side of the beam,

Korean Patent No. 10-0639751 (Name of the invention: bracket reinforced end fixing plate reinforcing structure of prestressed steel composite beam, publication date: November 01, 2006)

 Proceedings of the Korean Society for Railway Proceedings of the Fall Conference (Title: Estimation of section of orbital support pile structure for soft ground subsidence reduction, publication date: October 22, 2015)

Therefore, in the present invention, it is possible to construct a platform capable of solving the problems such as poor compaction and the recovery of steel formworks occurring in the lower part of the platform in the application of the rail-supported track-supported pile method, The present invention provides a precast concrete form for a pile supporting a pile and a method of constructing a concrete pile using the pile for precise construction and economical efficiency.

In order to provide the precast concrete for a track support pile,

A longitudinally precast wall panel extending longitudinally between the tops of the beams of the track support pile; And a transverse precast wall panel extending transversely on the upper side of the crossbar and having a longitudinal precast wall panel end and both ends assembled to each other, and a precast cast post for a track support pile, Molds.

In order to provide a concrete track construction method using the precast concrete for a pile support,

(a) constructing a transverse precast wall panel such that both ends are assembled and connected at opposite ends of the longitudinal precast wall panel longitudinally extending between the upper surfaces of the beams, and extending transversely to the upper surface of the beams; (b) installing a precast casting for a track supporting pile in a rectangular shape by connecting inner longitudinal bars to protruding reinforcing bars formed on inner side surfaces of the longitudinal precast wall panel and the transverse precast wall panels; And (c) placing the concrete in a manner that the protruding reinforcing bars are embedded in the inner space of the precast concrete for the track support pile, wherein the longitudinal precast wall panel and the transverse precast wall panel are integrated A method of constructing a concrete track using a precast form for a pile supporting pile for forming a platform is provided.

The present invention can reduce the cost of using a separate steel formwork for the construction of the platform unlike the conventional art because the concrete formwork is constructed by using the precast wall panel. As compared with the case using the steel formwork, It is possible to shorten the required space due to the demolition of the formwork, thereby making it possible to improve the economical efficiency and shorten the construction time.

In addition, pre-fabricated precast wall panels are installed and assembled in the field, and concrete is installed to construct the platform. Therefore, through the process simplification, the applicability and stability can be improved when applying the track support pile in the soft ground section.

In addition, since the precast wall panel manufactured is assembled and installed in the form of a rectangular frame, the work space can be secured, so that the lower bedrock of the lower part of the platform can be collapsed, thereby making it possible to prevent the subsidence while realizing the load sharing of the lower bedrock, .

In addition, the diameter of the protruded reinforcing bars protruding from the inner surface of the precast wall panel and the inner connecting reinforcing bars are made equal to each other, and then they are integrated with each other in the vertical direction, thereby enabling the structural integration of the precast wall panel.

FIG. 1A is a cross-sectional view of a concrete track construction using a conventional pile,
FIG. 1B is a construction sectional view and a front view of a conventional track supporting pile,
FIGS. 2A and 2B are a perspective view of a precast formwork for a track support pile of the present invention,
FIGS. 3A, 3B, and 3C are flowcharts of concrete track construction method using precast formwork for a track support pile of the present invention. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as " comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Precast formwork for pile supporting pile (100) of the present invention]

FIGS. 2A and 2B illustrate a perspective view of a precast formwork for a track support pile according to the present invention and an attempt to construct a construction pile.

Although the precast casting mold 100 for rail support piles is used for the field construction of a slab type platform 200 by using reinforced concrete on a beam formed on a pile head of a track support pile for railway, The pile 300 and the platform 200 are made of a combination of a precast concrete method and a cast concrete method and can be used in a slab girder bridge in which a bridge type or a bridge type is a problem in a road cross section as a bridge form. In the present invention, it is assumed that the platform 200 is installed on the rail by combining the precast method and the on-site placement method of the concrete pile on the pile head.

As described above, in the case of using the steel formwork for constructing the platform 200 in the conventional railway track support peg construction, when the steel formwork is used, the workability and economical efficiency are reduced, The platform 200 is constructed using the cast form 100.

2A, the platform 200 is provided with a precast casting pile 100 for a pile 300 at the top of the pile 300, 3B and 3C, the concrete reinforced concrete pipe 220 is installed after the inner connection reinforcing bars 210 are installed in the inner space of the pre-cast pile for assembly 100, which is assembled and installed.

As shown in FIGS. 2A and 2B, the precast casting mold 100 for a track support pile can be seen that the piles 300 are formed in two rows and are spaced apart from each other (spanwise) It can be seen that a cross beam 400 extending in the transverse direction is provided on the head of the railway 300 and a precast casting mold 100 for a track supporting pile is assembled on the upper surface of the beam in correspondence with the platform form.

First, the pile 300 may be a PHC file extended to the lower bed rock layer in soft ground or the like. In the case of FIG. 2A, the pile 300 is separated from the longitudinal direction by two columns, It can be seen that a precast casting mold 100 for supporting piles is installed.

Of course, the platform 200 is manufactured to have a size corresponding to one span or two spans, but it is possible to install the platform in a spanwise unit by continuously installing the precast casting 100 for a track support pile at a desired span.

Next, it can be seen that the cross beams 400 extend in the lateral direction in such a manner that the piles 300 of two rows are buried, and they can be constructed as precast cross beams or can be constructed by using cast concrete It does not matter.

It can also be seen that the cross beams 400 are also longitudinally spaced according to the longitudinal spacing of the piles 300.

Next, as shown in FIG. 2A and FIG. 2B, the precast casting mold 100 for a track support pile is constructed by constructing a platform 200 made of a slab-shaped reinforced concrete constructed to have a constant thickness on the upper surface of the beam 400 And is a precast member assembled and installed on the upper surface of the beam 400 in the form of a rectangular frame.

For example, according to FIG. 2A, both longitudinally precast wall panels 110 and 120 and the ends of both transverse precast wall panels 130 and 140 are arranged in a rectangular frame shape with stepped ends, such as jaws, Able to know.

At this time, the vertical precast wall panels 110 and 120 and the transverse precast wall panels 130 and 140 are assembled by bringing the fabricated products having a predetermined cross-sectional size and width considering the span in the factory,

As shown in FIG. 2B, the protruding reinforcing bar 150 protruded from the inside is exposed on the inner side. The protruding reinforcing bars 150 are formed to protrude laterally in the transverse precast wall panels 130 and 140 and are exposed to the inside of the precast casting mold 100 for the track support piles in the longitudinal precast wall panels 110 and 120. [ It can be seen that there is a difference between the two.

The protruding reinforcing bars 150 may be formed in various cross-sectional shapes. The protruding reinforcing bars 150 may be connected to the inner connecting reinforcing bars 210 separately disposed inside the precast casting mold 100 for the track support pile, The platform concrete 220 is installed and cured so that the inner connecting reinforcing bars and the protruding reinforcing bars are embedded into the precast casting mold 100 for the track support pile.

That is, the longitudinal precast wall panels 110 and 120 and the transverse precast wall panels 130 and 140 are integrated with the protruding reinforcing bars 150, the inner connecting reinforcing bars 210 and the concrete blocks 220 to form the platform 200 .

For this purpose, the protruding reinforcing bars 150 and the inner connecting reinforcing bars 210 have the same diameter, thereby contributing to the structural integration by the connection.

Further, since the bottom surfaces of the longitudinal precast wall panels 110 and 120 and the lateral precast wall panels 130 and 140 are opened, when the lower panel of the upper side of the beam 400 is directly compromised, it is possible to open the upper surface, 220), there is no need for a separate top surface finish, which is excellent in workability and economical.

The transverse precast wall panels 130 and 140 are disposed on the upper surface of the transverse beam 400 and the ends of the longitudinal precast wall panels 110 and 120 are stepped with the ends of the transverse precast wall panels 130 and 140 So that the shape of the end portion can be determined.

In the case of FIGS. 2A and 2B, it can be seen that the connection step A is formed to connect the ends, but other connection methods can be used.

In this case, if assembled and installed in a frame form, the transverse precast wall panels 130 and 140 need not be disposed on the upper surface of the beam 400, but may be determined in consideration of the vertical separation distance of the piles 300 and the like.

Also, the longitudinal precast wall panels 110 and 120 and the transverse precast wall panels 130 and 140 may be permanently installed without being disassembled separately, thereby solving the problems associated with conventional steel formwork collection.

The inner space of the longitudinal precast wall panels 110 and 120 and the transverse precast wall panels 130 and 140 is used as a space to house the inner connection reinforcing bars 210 and the ground around the beams 400 It is possible to effectively solve the settlement problem due to the construction of the lower roadbed compaction over the soft ground.

[Method of Concrete Track Construction Using Precast Formwork (100) for Track Support Pile of the Present Invention)

FIGS. 3A, 3B and 3C show a flowchart of a concrete track construction method using the precast concrete form 100 for a track support pile of the present invention.

First, as shown in FIG. 3A, the pile 300 and the beam 400 are installed.

So that the pile 300 penetrates the lower railway bed. In this case, a bedrock layer may be formed below the lower bedrock in the soft ground layer and the soft ground layer. In general, the pile 300 is installed to penetrate the soft ground layer and the lower bedrock so that the lower end thereof is supported on the bedrock layer, The same head height is applied by cutting and arranging the tofu in the vicinity.

For example, they are installed in two rows, spaced apart in the longitudinal direction, and the distance between the piles is not determined differently. The reason for the construction in the two rows is that the cross beams 400 are integrally installed on the head of the pile 300 so that the load transmitted from the beams 400 is efficiently transferred to the bedrock layer through the pile 300 So that the concrete track can not sink together with the lower bedrock located. So that not more than two rows but more than one or more than three rows will be optional if necessary.

The pile 300 may be a PHC file or the like, but is not limited thereto. The toe is exposed and integrally formed with the beam 400.

In order to secure the integrity of the pile 300 with the head of the pile 300, the crossbeam 400 can be constructed using cast concrete with a cast concrete structure. The load transmitted to the pavement 400 can be transferred do.

The track supporting pile is constructed such that a platform 200 having a predetermined thickness and width is installed on the upper surface of the beam 400. The longitudinal extension length is longer than one span considering the distance between the piles (span) For example, the thickness may be about 1M and the lateral width may be about 10M.

At this time, when the platform 200 itself is manufactured by the precast method, the efficiency and the workability of the construction, transportation, and longitudinal connection are significantly reduced.

Accordingly, as shown in FIG. 3B, the platform 200 is constructed by using the precast casting mold 100 for pile support.

Because the platform 200 is constructed in the form of a reinforced concrete square plate that supports concrete tracks including rails, ties, TCL layers, and HBS (or PCL) layers, the longitudinal precast wall panels 110,120 and the transverse precast walls The panels 130 and 140 are assembled in a rectangular shape and then the platforms 200 are structurally integrated in the longitudinal direction by using the internal connection reinforcing bars 210 and the concrete 230.

The transverse precast wall panels 130 and 140 can be set up to stand on the upper surface of the transverse beam 400 and be formed in a sectional shape advantageous for end assembly connection. So that both ends of the longitudinal precast wall panels 110 and 120 are connected to both ends of the longitudinal precast wall panels 110 and 120 so as to prevent top surface steps from being generated.

That is, only the outer portion of the finished platform 200 is formed in advance by the pre-casting method using the transverse precast wall panels 130, 140 and the longitudinal precast wall panels 110, 120.

In addition, if the transverse precast wall panels 130 and 140 and the longitudinal precast wall panels 110 and 120 are used, it is easy to manufacture but since each weight is not large, .

In addition, the longitudinal connecting portion can be installed efficiently by inserting the expansion joint (rubber sealing material, etc.) while the ends are assembled to each other, so that the usability can be expanded.

It can be seen that the protruding reinforcing bars 150 protrude from the inner side surfaces in the transverse precast wall panels 130 and 140 and the longitudinal precast wall panels 110 and 120. [

Next, as shown in FIG. 3C, the embankment is filled with the inner space of the transverse precast wall panels 130 and 140 and the longitudinal precast wall panels 110 and 120 assembled in a rectangular shape.

That is, the embankment is tightly confined to the upper surface of the lower portion so as to prevent the uneven settlement of the lower portion of the finished fretboard. The height of the compaction may be adjusted to the height of the upper surface of the beam 400.

Next, the inner connection reinforcing bars 210 are placed on the protruding reinforcing bars 150 to restrain the transverse precast wall panels 130 and 140 and the longitudinal precast wall panels 110 and 120, So that it is possible to integrate the structure in a unified manner.

As shown in FIG. 3C, the lateral pre-cast wall panels 130 and 140 installed in a rectangular shape with the inner connection reinforcing bars 210 being laid out and the concrete concrete panel 220 are installed in the inner spaces of the longitudinal precast wall panels 110 and 120 So that the protruding reinforcing bars 150 and the inner connecting reinforcing bars 210 are embedded. The concrete 220 is poured and cured up to the upper surfaces of the transverse precast wall panels 130 and 140 and the longitudinal precast wall panels 110 and 120.

That is, the transverse precast wall panels 130 and 140 and the longitudinal precast wall panels 110 and 120 serve as molds.

Further, it can be seen that the final platform 200 is manufactured by integrating the transverse precast wall panels 130 and 140 and the longitudinal precast wall panels 110 and 120 with each other by the platform concrete 220 in the longitudinal direction, It can be seen that they are mixed.

At this time, an HBS (or PCL) layer is further formed on the upper surface of the platform 200.

The HBS (or PCL) layer is used as a concrete layer in a concrete track, and a TCL layer is formed on the upper surface of the HBS (or PCL) layer and a rail is fixed on the upper surface of the TCL layer. It is finally possible to complete.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Precast formwork for pile support
110, 120: longitudinal precast wall panel
130, 140: transverse precast wall panel
150: exposed reinforcing steel 200: platform
210: Internal connection reinforcing bar 220: Platform concrete
300: Pile 400: Rear beam

Claims (10)

Longitudinally precast wall panels 110, 120 longitudinally extending between the tops of the beams 400 of the track support pile; And
And transverse precast wall panels 130, 140 extending transversely to the upper surface of the transverse beam 400 and having ends of the longitudinal precast wall panels 110, 120 and both ends assembled together, Precast formwork for track support piles formed in the shape of a rectangle. The method according to claim 1,
The protruding reinforcing bars 150 are further formed on the inner side surfaces of the longitudinal precast wall panels 110 and 120 so that the inner connecting reinforcing bars 210 and the protruding reinforcing bars 150 are connected to each other to constrain the longitudinal precast wall panels 110 and 120 Precast formwork for track support piles. 3. The method of claim 2,
The transverse precast wall panels 130 and 140 are further formed with protruding reinforcing bars 150 on the inner side so that the inner connecting reinforcing bars 210 and the protruding reinforcing bars 150 are connected to each other so that the transverse precast wall panels 130 and 140 are constrained Precast formwork for orbital support piles. The method according to claim 1,
Further comprising a concrete concrete pavement (220) laid and cured such that a protruding reinforcing bar (150) is embedded in an inner space of the orbit supporting pile precast concrete formwork (100), so that the longitudinal precast wall panels (110,120) and the lateral precast And the wall panels (130, 140) are integrated with each other to form the platform (200). The method according to claim 1,
The longitudinal precast wall panels 110 and 120 and the transverse precast wall panels 130 and 140 are assembled and connected at both ends by the connection step A so that the upper surfaces of the longitudinal precast wall panels 130 and 140 are formed in the same shape, A precast formwork for a track support pile that allows the concrete concrete (220) to be laid. The method according to claim 1,
The lateral beam 400 is integrated with the head of the pile 300 and extends in the transverse direction and is used as an inner space of the precast casting for pile 100 provided on the upper surface of the beam 400, And the pile 300 is supported by the bedrock layer 4 through the lower rope plate at the lower portion of the beam 400 to support the load of the platform 200 Precast formwork for track support piles constructed as track supported piles. (a) both longitudinal ends of the longitudinal precast wall panels 110 and 120 installed to extend longitudinally between the upper surfaces of the beams 400, both ends of which are assembled and connected to each other, Constructing the cast wall panels 130,140;
(b) connecting the inner connecting reinforcing bars 210 to the protruding reinforcing bars 150 formed on the inner side surfaces of the longitudinal precast wall panels 110 and 120 and the transverse precast wall panels 130 and 140, Installing precast dies (100) in a rectangular shape; And
(c) placing the concrete concrete (220) in such a manner that the protruding reinforcing bars (150) are embedded in the inner space of the precast concrete formwork (100) for the track support pile, wherein the longitudinal precast wall panels And the transverse precast wall panels 130 and 140 are integrated with each other to form the platform 200. The method of claim 1, The method according to claim 6,
The beam 400 in the step (a) is supported on the bedrock layer 4 through the lower bedrock so that the pile 300 is installed to support the load of the platform 200, A method of constructing a concrete track using a precast formwork for pile support constructed to extend in a direction. The method according to claim 6,
The longitudinal precast wall panels 110 and 120 and the transverse precast wall panels 130 and 140 of the step (a) are connected to each other at the connection step A so that the top surfaces of the transverse precast wall panels 130 and 140 are shaped like a rectangle A method of constructing a concrete track using a precast form for a pile supporting pile, wherein the pile concrete is installed in the inner space. The method according to claim 6,
Between the step (b) and the step (c), the inner side space of the precast casting mold 100 for a track support pile installed on the upper side of the beam 400 is plastered with the embankment, The pile 300 is supported by the bedrock layer 4 through the lower saddle plate below the beam 400 to support the load of the platform 200,
The method of claim 1, further comprising forming an HBS or PCL layer on the upper surface of the platform (200) after the step (c).

Images