Pre-control method for preventing inclination of sinking well

A caisson and shaft wall technology, applied in the fields of municipal engineering and civil engineering, can solve the problems of difficult deviation correction, no method of pre-controlling the inclination of the caisson, and inclination of the caisson, so as to avoid the inclination of the caisson.

Inactive Publication Date: 2009-08-12
CHINA FIRST METALLURGICAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to geological conditions, excavation asymmetry, and different loads around the caisson, caissons often tilt during the sinking process, and it is difficult to correct the deviation, which may even affect the normal progress of the project and cause safety accidents. For the problem of caisson sinking and tilting, the traditional method is to use asymmetrical excavation and asymmetric surcharge on the upper part of the caisson or the outside of the caisson to correct the deviation, but these are all passive measures after the caisson tilts
Currently, there is no method to pre-control caisson inclination

Method used

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  • Pre-control method for preventing inclination of sinking well
  • Pre-control method for preventing inclination of sinking well
  • Pre-control method for preventing inclination of sinking well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 , figure 2 , image 3 As shown, the pre-control method to prevent caisson tilting includes the following steps:

[0024] 1), before the sinking of the caisson, construct the first cast-in-place pile 8, the second cast-in-place pile 9, the third cast-in-place pile, and the fourth cast-in-place pile in the caisson. layout (clear distance), 90° to each other, the bottom of the 4 cast-in-situ piles is located below the design elevation of the bottom of the caisson (the depth of the 4 cast-in-place piles should meet the force requirements), and the tops of the 4 cast-in-place piles Located at the design elevation of the bottom of the caisson; then insert steel structural columns on the top of the four cast-in-place piles (the steel structural columns are fixed on the top of the cast-in-place piles, respectively the first steel structural column 1, the second steel structural column 2, the third Steel structure column 3, the fourth steel structure column ...

Embodiment 2

[0029] It is basically the same as Embodiment 1, except that: step 3) move all the steel corbels vertically up by 0.5m and fix them on the inner side of the caisson wall.

Embodiment 3

[0031] It is basically the same as Embodiment 1, except that: step 3) moving all the steel corbels vertically up 3m and fixedly installing them on the inside of the well wall of the caisson.

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PUM

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Abstract

The invention relates to a pre-control method for preventing sunk well inclination. The pre-control method for preventing the sunk well inclination is characterized by comprising the following steps: before predicting the sunk well inclination before a sunk well sinks or during sunk well construction, constructing 4 to 10 support piles in the sunk well, and fixing a steel structural column at the top of the support pile; before the sunk well construction enters a soil layer which easily causes the sunk well inclination, temporarily stopping the sunk well construction; firstly, fixedly mounting 4 to 12 steel corbels at the lower part inside the well wall of the sunk well along the same circumference, then digging soil with a depth of 1 to 3.5 meters, fixedly mounting a support beam on the steel structural column, and extending the end of the support beam into the underside of the steel corbel inside the well wall of the sunk well; then beginning the sunk well construction till the sunk well sinks to the steel corbels and falls onto the support beam; vertically moving all the steel corbels upwards for 0.5 to 3 meters, and fixedly mounting the steel corbels inside the well wall of the sunk well till the lower end of the well wall of the sunk well sinks to the design elevation at the bottom; and then dismounting the steel corbels and the support beam, and dismounting the steel structural column and the support pile above the design elevation at the bottom of the sunk well. The method can pre-control the sunk well inclination.

Description

technical field [0001] The invention belongs to the fields of civil engineering and municipal engineering, and in particular relates to a pre-control method for preventing caisson tilting. Background technique [0002] Due to geological conditions, excavation asymmetry, and different loads around the caisson, caissons often tilt during the sinking process, and it is difficult to correct the deviation, which may even affect the normal progress of the project and cause safety accidents. For the problem of caisson sinking and tilting, the traditional method is to use asymmetrical excavation and asymmetric surcharge on the upper part of the caisson or the outside of the caisson to correct the deviation, but these are all passive measures after the caisson tilts . Currently, there is no method for pre-controlling caisson inclination. Contents of the invention [0003] The object of the present invention is to provide a pre-control method for preventing caisson inclination, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D23/08
Inventor 王平
Owner CHINA FIRST METALLURGICAL GROUP
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