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Method for reinforcement treatment of karst landform super high-rise building foundation

A processing method and super high-rise technology, applied in construction, infrastructure engineering, soil protection and other directions, can solve the problems of collapse, foundation sliding, poor stability of the bearing layer under the pile end of the building foundation, etc., to improve the stability, Guaranteed effect of stability

Active Publication Date: 2016-12-21
贵州建工安顺建筑工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a method for reinforcing the foundation of super high-rise buildings in karst landforms, so as to solve the problems of poor stability of the underlying bearing layer under the pile ends of the building foundation, insufficient bearing capacity of the foundation, and Problems such as uneven settlement of foundation, foundation sliding and subsidence

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 2 grouting reinforcement holes are evenly distributed within the scope of the karst cave. The drilling diameter of the grouting reinforcement hole is 120mm, and the hole depth goes through the karst cave and enters the underlying complete bedrock 1.0m; Expansion screws are fixed to bury the grouting water pipe with an outer diameter of 80mm and a length of 0.6m, and the outer length of the grouting reinforcement hole exposed is 1 / 3 of the total length; add 500mm long sections up and down within the range of the karst cave at the bottom of the pile, and use high-pressure rotary spraying Clean water cutting equipment performs high-pressure clean water cutting and cleaning on the cave, so that the filling slag in the cave is discharged out of the pile to form a hollow body; the specific steps are: sequentially insert high-pressure rotary spray equipment into each grouting reinforcement hole, and use high-pressure water flow to destroy the filling in the cave Then use the ne...

Embodiment 2

[0028] Two grouting reinforcement holes are evenly distributed within the cave, the drilling diameter of the grouting reinforcement hole is 90mm, and the hole depth passes through the karst cave and enters the underlying complete bedrock 0.5m; Expansion screws are fixed to bury the grouting water pipe with an outer diameter of 65mm and a length of 0.6m, and the outer length of the grouting reinforcement hole exposed is 1 / 3 of the total length; add 500mm long sections up and down within the range of the pile bottom karst cave, and use high-pressure rotary spraying Clean water cutting equipment performs high-pressure clean water cutting and cleaning on the cave, so that the filling slag in the cave is discharged out of the pile to form a hollow body; the specific steps are: sequentially insert high-pressure rotary spray equipment into each grouting reinforcement hole, and use high-pressure water flow to destroy the filling in the cave Then use the negative pressure formed by high...

Embodiment 3

[0030] Two grouting reinforcement holes are evenly distributed within the cave range, the drilling diameter of the grouting reinforcement hole is 100mm, and the hole depth passes through the karst cave and enters the underlying complete bedrock 0.85m; Expansion screws are fixed to bury the grouting water pipe with an outer diameter of 76mm and a length of 0.6m, and the outer length of the grouting reinforcement hole exposed is 1 / 3 of the total length; add 500mm long sections up and down within the range of the karst cave at the bottom of the pile, and use high-pressure rotary spraying Clean water cutting equipment performs high-pressure clean water cutting and cleaning on the cave, so that the filling slag in the cave is discharged out of the pile to form a hollow body; the specific steps are: sequentially insert high-pressure rotary spray equipment into each grouting reinforcement hole, and use high-pressure water flow to destroy the filling in the cave Then use the negative p...

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Abstract

The invention discloses a method for reinforcement treatment of a karst landform super high-rise building foundation. The method comprises the steps of grouting reinforcement hole drilling, mud jacking water pipe laying, high pressure clear water cutting cleaning, high-pressure grouting slurry preparation, high pressure jet grouting construction, mud jacking cement paste preparation, primary injection mud jacking construction, mud jacking, secondary injection mud jacking construction and pile foundation core-pulling detection and the like. Grouting filling gap treatment is performed on a karst cave under a file foundation, a cavity of the karst cave is filled densely, filling and the environment are solidified to be a whole, and enough strength is available to bear a super high-rise building; the connection between the karst cave and underground water can be cut off, the karst cave not longer develops, the stability of a horizontal bearing stratum under the pile end is improved, the stability and strength of the bearing stratum meet the design requirements, and foundation stability and building safety are guaranteed.

Description

technical field [0001] The invention relates to the technical field of karst karst landform super high-rise building construction, in particular to the technical field of karst karst geological treatment, and in particular to a foundation reinforcement treatment method for karst karst landform super high-rise buildings. Background technique [0002] The so-called karst landform is a general term for the surface and underground forms formed by the dissolution of soluble rocks by water with dissolution power, also known as karst landform. It is mainly based on dissolution, and also includes mechanical erosion processes such as flowing water erosion, subsurface erosion, and subsidence. Karst landforms in my country are widely distributed and large in area, mainly in the Yunnan-Guizhou Plateau. The construction of super high-rise buildings in karst landform areas is a difficult project. This is because the rock surface in karst areas fluctuates greatly, the rock outcrops have no...

Claims

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Application Information

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IPC IPC(8): E02D3/12
CPCE02D3/12
Inventor 刘峥刘璇付定鑫卢华杨新林李光勇彭德华程继方袁肖
Owner 贵州建工安顺建筑工程有限公司
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