Method for preventing cyclone well from sinking when sealing bottom

A swirling well and bottom sealing technology, which is applied to caissons, buildings, and infrastructure engineering, can solve the problems of swirl well sealing bottom sinking, etc., and achieve the effect of convenient operation and low cost

Inactive Publication Date: 2009-09-09
CHINA FIRST METALLURGICAL GROUP
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide a method for preventing the sinking of the swirl well when sealing the bottom, which can solve the problem of sinking when the swirl well is sealed

Method used

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  • Method for preventing cyclone well from sinking when sealing bottom
  • Method for preventing cyclone well from sinking when sealing bottom
  • Method for preventing cyclone well from sinking when sealing bottom

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Embodiment Construction

[0014] like figure 1 , figure 2 , image 3 As shown, the method for preventing the sinking of the swirl well when sealing the bottom includes the following steps:

[0015] 1) When the swirling well is dug to the bottom design elevation of the bottom cover, drill four cast-in-situ piles in the well (respectively the first pile 1, the second pile 2, the third pile 3, and the fourth pile 4), and the four cast-in-place piles The piles are arranged along the shaft wall 5 according to the settlement velocity and deviation (90° to each other), and the depths of the four cast-in-place piles respectively meet the rock-entry conditions;

[0016] 2), the bearing capacity of the four cast-in-place piles is greater than or equal to the difference between the self-weight and the frictional resistance of the shaft wall 5, and the frictional resistance is the frictional resistance between the shaft wall and the soil layer; then pour simply supported beams ( Cast the first simply supported...

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Abstract

The invention belongs to the technical field of construction of a cyclone well and particularly relates to a method for preventing the cyclone well from sinking when sealing bottom. The method is characterized by comprising the following steps (1) when the cyclone well is excavated to the bottom designed elevation of the sealing bottom, 4 to 20 grouting piles are drilled in the well and the depth of each grouting pile meets entering-rock condition respectively; and (2) then simple beams are poured on the 4 to 20 grouting piles and the sealing bottom is sealed from the bottoms of the simple beams till the top designed elevation of the sealing bottoms. The bearing capacity of 4 to 20 grouting piles is large than or equal to the difference value of the self weight and the frictional resistance of the well wall and the frictional resistance is equal to the frictional resistance between the well wall and the soil layer. The method can solve the problem of sinking of the cyclone well when sealing bottom (the bearing capacity is not enough when the bearing layer is the soil layer).

Description

technical field [0001] The invention belongs to the technical field of swirl well construction (by adopting a caisson construction method), and in particular relates to a method for preventing the swirl well from sinking when the bottom is sealed. Background technique [0002] During the construction (by caisson construction method), when the soil is excavated until the design bottom sealing elevation is reached, due to the uneven distribution of the base soil layer and the difference in softness and hardness of the soil, during the bottom cleaning process, a part of the bearing layer at the bottom of the well is fully weathered Part of the granite layer is still a silty clay layer and further subsides, so that the part of the whirlpool well subsides rapidly, and the original height difference between any two points of 170mm rapidly expands to 350mm, exceeding the construction specification requirements of the whirlpool well. The height difference between any two points is f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D23/16
Inventor 赵海莲张桂军谢铁成蔡晓波谢国斌李冰
Owner CHINA FIRST METALLURGICAL GROUP
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