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A caisson construction structure using a connector and its construction method

A construction method and a technology of a connector, which are applied to the construction structure of caissons and its construction field, can solve the problems of grouting body tensile damage, box body damage, caisson bulging, etc., so as to reduce the amount of excavation drainage and improve construction efficiency. quality, the effect of reducing water pressure

Active Publication Date: 2022-05-24
CHINA CONSTR SECOND ENG BUREAU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional caisson construction has the problem that the caisson is difficult to sink to the design elevation due to the excessive buoyancy of the groundwater due to the continuous rise of the groundwater level.
If not handled properly, there may be risks such as local bulging of the caisson under pressure, uplift deformation, leakage caused by the damage of the box body, damage of the grouting body under tension, and overall floating of the caisson.

Method used

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  • A caisson construction structure using a connector and its construction method
  • A caisson construction structure using a connector and its construction method
  • A caisson construction structure using a connector and its construction method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] see Figure 1 to Figure 8 As shown, the first embodiment of the present application provides a construction structure for fixing a caisson 1 by using an anchor rod, including: a pit body 31 , an anti-floating anchor rod 2 and a caisson 1 . The anti-floating anchor rod 2 is fixed in the soil layer at the bottom of the pit body 31 . The caisson 1 is installed in the pit body 31 , and the caisson 1 is connected with the anti-floating anchor rod 2 , and the anti-floating anchor rod 2 defines the position of the caisson 1 . In this application, the anti-floating anchor rod 2 is first constructed, and then the earthwork excavation and the installation of the caisson 1 are carried out. After the caisson 1 is installed in place, the anti-floating anchor rod 2 is welded and connected, and the anti-floating anchor rod 2 is prestressed and tensioned to prevent floating. effect. The pull-out resistance provided by the anti-floating anchor rod 2 in the present application effectiv...

Embodiment 2

[0054] The second embodiment of the present application provides a construction method for fixing the construction structure of the caisson 1 by using an anchor rod in the above-mentioned first embodiment. Specifically, it includes the following steps:

[0055] Step S1, see image 3 As shown, drill holes on the undisturbed soil 3 to install the anti-floating anchor rod 2;

[0056] The top elevation of the undisturbed soil 3 is the bottom elevation of the large surface of the raft foundation 9 , and the anti-floating anchor rod 2 is pre-drilled and grouted on the upper surface of the undisturbed soil 3 . Preferably, two anti-floating anchor rods 2 can be connected to each inclined wall 12 around the installed caisson 1 . The anti-floating anchor rod 2 can use steel strands 21, for example, a locator can be welded every 2.0m, the total length of the anchor rod is 15m, the length of the free end is 5m, the length of the anchoring section is 10m, and the locking value is 300KN. ...

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Abstract

The invention discloses a caisson construction structure using a connector and a construction method thereof. The construction structure includes a pit body, a caisson and a connector. The caisson is installed in the pit body. The communicating device is connected to the caisson, and the connecting port is provided on the caisson to communicate with the communicating device. Through the design of the connector, it is convenient for the caisson to sink to the design elevation, and the connector can also be used for emergency pumping and dewatering, reducing the water pressure, effectively preventing the water level from rising and causing excessive water pressure to cause excessive deformation of the caisson, and improving the construction quality. The post connector can also be used for reinforcement of the grouting at the bottom of the caisson.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a caisson construction structure using a communicating device and a construction method thereof. Background technique [0002] Waterproofing construction of deep foundation pits is an important part of deep foundation pit engineering construction. The use of caisson water isolation method can reduce groundwater discharge and effectively reduce costs. However, the traditional caisson construction has the problem that it is difficult for the caisson to sink to the design elevation due to the excessive buoyancy of the groundwater due to the continuous rise of the groundwater level. If not handled properly, there may be risks such as local bulge under pressure, bulge and deformation, leakage caused by damage to the box body, tensile failure of the grouting body, and overall floating of the caisson. [0003] In view of this, the present invention is proposed. SUMMARY ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/10E02D19/06E02D23/02
CPCE02D19/10E02D19/06E02D23/02
Inventor 李佳兴张静涛张雪峰高振轩百世健方舟霍俊灼胡斯尹双越杨晓东
Owner CHINA CONSTR SECOND ENG BUREAU LTD
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