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Method for precontrolling subsidence slant of sinking well

A caisson and well wall technology is applied in the field of pre-controlling the sinking and inclination of the caisson, and can solve the problems of the inclination of the caisson, the difficulty in correcting deviation, and the lack of a method for pre-controlling the sinking and inclination of the caisson.

Inactive Publication Date: 2012-06-13
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
At present, there is no method to pre-control the inclination of caisson sinking

Method used

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  • Method for precontrolling subsidence slant of sinking well
  • Method for precontrolling subsidence slant of sinking well
  • Method for precontrolling subsidence slant of sinking well

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Such as figure 1 , figure 2 , image 3 As shown, the method for pre-controlling the sinking and inclination of the caisson includes the following steps:

[0023] 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...

Embodiment 2

[0029] It is basically the same as in Example 1, except that: firstly, 4 steel structural columns are excavated to 1.0m below the upper surface of the soil layer prone to caisson inclination; then 4 steel structural columns are excavated to the above-mentioned 1.0m below the well wall of the caisson on the steel structure beam (that is, at the foot of the caisson blade). The caisson is leveled and controlled every time the caisson is 0.5m high (the beam height is 0.5m).

Embodiment 3

[0031] It is basically the same as in Example 1, except that: firstly, 4 steel structural columns are excavated to 1.5m below the upper surface of the soil layer prone to caisson inclination; 1.5m below the well wall of the caisson on steel structural beams. The caisson is leveled and controlled for each caisson 1.0m (beam height 0.5m).

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Abstract

The invention relates to a method for precontrolling the sink and oblique of an open caisson, which is characterized by comprising the following steps: constructing 4-10 support stakes and fixing steel structure pillars on the top thereof; suspending the open caisson construction before the open caisson construction goes into the soil horizon where open caisson oblique is prone to appear; digging out the 4-10 steel structure pillars to a place which is 1-3.5 meters below the upper surface of the soil horizon where open caisson oblique is prone to appear, taking out the earthwork below the wall of the open caisson into which 2-6 support beams will stick, fixing the support beams on the steel structure pillars, and then putting the ends of the 2-6 support beams into the part under the wall of the open caisson; then beginning the open caisson construction till the open caisson goes down to the support beams; leveling and controlling the open caisson every time when the open caisson sinks for a certain section; not stopping until the lower end of the open caisson wall goes down to the bottom designed elevation of the open caisson; then removing the support beams, steel column and support piles. The method has the advantage of greatly decreasing the incline occurrence probability of open caissons.

Description

technical field [0001] The invention belongs to the fields of civil engineering and municipal engineering, and in particular relates to a method for controlling the sinking and inclination of caissons in advance. 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 . At present, there is no method for pre-controlling the sinking inclination of caissons. Contents of the invention [0003] The object of the present invention is to provide a method for contr...

Claims

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Application Information

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