SU1048052A1 - Arrangement for forming pit for a foundation - Google Patents

Description

 The invention relates to the construction, and specifically to the formation of a foundation pit, predominantly columnar, under the foundation of the foundation.

A device is known for forming a foundation pit, including a working rammer, which narrows downwards. In this case, the working body is made with a through vertical channel and is provided with a transmission plate l.

In order to ensure that the tamper is immersed to a predetermined depth in the correct shape of the excavation pit and the safety of its walls, the dimensions of the tamper bottom are made smaller than the dimensions of its top. However, due to this form of tamping and the resulting excavation, the bearing capacity of the foundation in the excavated excavation under vertical load and, in particular, its stability against the action of horizontal forces, tilting, decreases. of the moment and forces of the frosty heel of the ground. Therefore, in many cases, it is advisable to wear down the lower part of the rammed pit and the foundations in it.

The device closest to the invention in terms of its technical essence and the result achieved is (for the formation of a foundation pit for a foundation containing a working body narrowing downwards, expanders with hinged levers and lukhanizm turn 2.

The disadvantage of this device is the need for an additional mechanism (for example, a drilling machine) and, therefore, additional labor costs for the work of the expander, i.e. to create a broadening.

The purpose of the invention is to reduce the labor intensity of broadening.

This goal is achieved by the fact that, in a device for the formation of a foundation pit for a junction containing a working body narrowed downwards, expanders with hinged levers and; noBojxjTa mechanism, the working body is made with a central blind channel, in which the mechanism of rotation of the expander is placed, the latter is made in the form of a polyspast system with a counterweight connected to the hinged levers and with the axis of the lower 8klock of the polyspast system.

FIG. 1 shows a device mounted on an excavator crane (base machine), a general view of / in FIG. 2 - the same, with closed flaps widening, longitudinal section, FIG. 3 - the same with newly extended flaps.

The device includes a body of the working body (tamper), on which, with the help of hinges, flaps-expanders 2 are fixed, which, in the closed position, are an extension of the walls of housing 1. Flaps-expanders 2 are hinged to the outermost lever 3, which in turn is hinged to intermediate lever .4. The latter is made in the form of a knee and is attached on one side to the extreme inner lever 5, and on the other is pivotally attached to the bottom b of the housing 1. The lever 5, which is an extension of the lever 4, is made in the form of a hollow tube that is attached at one end to the lever 4, and the second is pivotally attached to the counterweight 7 located in the cavity (channel) 8 of the working body. Counterweight 7 with the help of a chain hoist 9 to the roofs. 10 of the housing 1 ,. the lower block 11 of the polyspast 9 is attached to the counterweight 7, and the upper block 12 is attached to the lid 10 of the housing 1. The running end of the half of the polyspast 9 is provided with a loop 13, which is attached to the hook 14 of the load cable 15 of the base machine 16, equipped with. directed towards the rod 17, on which the carriage 18 is fixed with the latch 19, connected with the console 20 with the krpaka 10 of the working shaft. . The device works as follows.

 A pit is excavated in the ground by dropping the device in the direction of the rod 17 using a base machine. 16 (crane excavator). .

one- , . After the end of the trampling

in the soil 21 of the excavation, the carriage 18 is fixedly fixed with the help of the clamp 19 to the carriage 18 on the guide rod 17 and the cargo cable 15 of the base machine is lowered down. On the hook 14 of the cargo cable 15, the loop 13 of the polyspast 9 is put on, after which the cargo cable 15 is lifted, which is accompanied by a contraction of the polyspast 9 and the lifting of the counterweight 7, thus turning the levers 3-5 and turning the hinges of the expander 2 hinges with their extension the plane of the housing 1 device, leading to the broadening of the bottom of the pit.

After the end of the process of broadening the bottom of the excavation, the cargo cable 15 is again lowered down, and the loop 13 of the polyspast 9 is removed from its hook 14, and at 3fOM the counterweight 7 is lowered and turns in the opposite direction 1-5 3-5, which causes the flaps-expanders 2 to close.

The proposed device makes it possible to reduce the laboriousness of forming a broadening in a rammed trench using the same basic machine both for ramming the trench and for its broadening. In addition, pos.

KOLKA working body (tamper)

in the process of the formation of the broadening of the holders in the rammed pit, in contact with its walls, it prevents the latter from collapsing.

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Claims (1)

A DEVICE FOR EDUCING A COOKED UNDER A BASE, containing a working body tapering downwards, extenders with articulated levers and a rotation mechanism, characterized in that, in order to reduce the complexity of the formation of broadening, the working body is made with a Central blind channel, in which the rotation mechanism of extenders is placed, the latter made in the form of a chain hoist with a counterweight connected to the articulated levers and with the axis of the lower block of the chain hoist system. 4 * QO With the help of hinges, hinges-expanders 2 are fixed with loops, which, in the ¹ closed position, extend the walls of the housing 1. The flaps-expanders 2 are pivotally connected to the outermost 5 lever 3, which in turn is pivotally connected to the intermediate lever 4. The latter is made in the form knee and attached on one side to the outermost lever 5, 10 and on the other · * - pivotally attached to the bottom b of the housing 1 ·. The lever 5, which is the extension of the lever 4, is made in the form of a hollow tube that is worn, and the second 15 is pivotally attached to the counterweight 7 located in the cavity (channel) 8 of the working body. The counterweight 7 is suspended by means of a chain hoist 9 to the cover 10 of the housing 1, and the lower block 11 of the chain hoist 9 is attached to the counterweight 7, and the upper block 12 is attached to the cover 10 of the housing 1. The downstream end of the cable of the chain hoist 9 is provided with a loop 13 worn on the hook 14 freight tro-. 25 sa 15 of the base machine 16, equipped with a guide rod 17, on which the carriage 18 is fixed with a latch 19, connected \ using the console 20 with the cover 10 of the working body. . The device operates as follows. Rammed in the ground 21 pit by dropping the device along the guide rod 17 using the base machine. 16 (crane-excavator).