SU1763579A1 - Device for erecting foundation - Google Patents

Abstract

SUMMARY OF THE INVENTION: In a device for erection of a foundation comprising a slab with a central hole through which a barrel with an anchor head is passed and placed around its upper part with a toroidal shell filled with working medium, and a power element toroidal shell is closed, and the working medium in its cavity is in the form of a rigid toroidal element coated on the outside with antifriction lubricant, the strength of which exceeds the strength of the soil under the slab. 3 il.

Description

The invention relates to the construction, in particular, to the erection of foundations for buildings and structures, mainly on weak and subsiding soils.

FIG. 1 shows a device, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the finished foundation, a longitudinal section.

The device consists of a trunk 2 buried in the ground 1 with an anchor head 3 and placed around its upper part with a toroid-shaped sheath 4 of elastic material. In the cavity of the shell there is a rigid toroidal element 5 with antifriction lubricant. A plate 6 is installed on the surface of the soil 1 with a central hole into which the barrel 2 is inserted. An force in the plate is created by the force mechanism 7 through the pipe 8.

The device works as follows. First, a well is formed from the surface of the soil 1 to the required depth, then a plate 6 with a central hole is installed on the surface of the soil so that the center of this hole passes through

borehole center Trunk 2 with anchor head 3 is inserted into the borehole through the central hole of the plate. Before the barrel 2 is inserted, a toroidal shell 4 of elastic material, such as rubber, is put on it in advance. In the cavity of the shell 4, a rigid toroid-shaped element 5 is installed, for example, from plastic, which is coated with antifriction lubricant, for example, technical oil. The outer diameter of the toroidal shell 4 is equal to the diameter of the well. A toroid-shaped shell through the pre-installed on the plate pipe 8 simultaneously with the barrel 2 is introduced into the upper part of the well. On top of the plate 6 on the nozzle 8, a power mechanism 7 is installed in the form of a hydraulic jack with a locking device (not shown) for attachment to the barrel 2. The force mechanism 7 attached to the barrel 2 transfers pulling force to it, and the plate 6 is pressed in through the nozzle 8. Under the action of these efforts, the anchor head 3 first opens, the soil is squeezed beneath it and partial immersion of the plate 6, and then

e

w

fe

Vi o

 ate

VI th

as the reactance of the soil grows - immersion of the plate 6 in the ground. During the immersion of the plate, it is rolled downwardly through the nozzle 8 without special resistance to friction along with the toroidal shell 4 with a rigid toroidal element 5 installed in its cavity. Element 5 does not interfere with the rolling of the toroidal shell 4, since its surface in contact with the shell 4 is coated with antifriction lubricant. The material of the toroidal element 5 is chosen so that its compressive strength exceeds the compressive strength of the soil under the slab 6. This helps prevent the weakening of the soil under the slab 6 due to its lateral discharge into the well. After the plate 6 is immersed at the design level, the stem 2 is pulled out. To do this, the pulling force of the force mechanism 7 is reduced, the anchor head 3 is folded, and then the pull force is increased on the barrel 2 while the filling material 9 is fed through the central cavity 2 .

The filling material is accepted in accordance with the design decision of the foundation: if the foundation is built on a natural foundation, then clay, sand — if the load is transferred to the underlying layers of the base, then hardening materials, such as concrete, are used.

In the process of removing the barrel 2, the inverse shell 4 with the rigid element 5 rolls up into the nozzle without excessive friction resistance and protects the soil under the slab b from softening.

until the end of the filling of the cavity 10 with the filling material 9. Following this, the force mechanism 7, the barrel 2, the shell 4 with the toroidal element 5, the socket 8 are removed and the cavity 10 is embedded in the foundation, for example, monolithic.

Upon completion of the construction of the foundation it is passed by known methods.

the load from the structure, for example, installation under the column, the support of the foundation beams, etc.

The proposed device is characterized by simplicity and increased reliability, since

it does not require the presence of a complex system of supplying and controlling the state of the working medium in the cavity of the toroidal shell, also when the tightness of the toroidal shell is lost, the device does not lose its operability, since toroidal element is not able to leak from the shell of the hollow,

Claims (1)

The invention The device for the construction of the foundation, including a plate with a central hole, through which the barrel with the anchor head and placed around its upper part with a toroid-shaped sheath of elastic material, filled with working medium, and supported on the plate through the branch pipe, is different the fact that, in order to increase the reliability in operation and simplify the production of work, the toroidal shell is closed, and the working medium in its cavity is in the form of lubrication of a hard toroidal element, the strength of which exceeds the strength of the soil under the slab, Aa 1 dJu & 2 h / /// /// /// Phie, 3 /// // // // G,