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Method for stabilizing foundation based on electro-osmosis technique and bucket foundation negative pressure technique

A cylindrical foundation and foundation reinforcement technology, which is applied in basic structure engineering, soil protection, construction, etc., can solve the problem that the cylindrical foundation is difficult to meet the requirements of bearing capacity and stability, and achieve outstanding effects, low cost, The effect of improving bearing capacity and stability

Inactive Publication Date: 2010-09-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such areas with unfavorable geological conditions, it is difficult for the cylindrical foundation to meet the requirements of bearing capacity and stability, and there are safety problems in use

Method used

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  • Method for stabilizing foundation based on electro-osmosis technique and bucket foundation negative pressure technique
  • Method for stabilizing foundation based on electro-osmosis technique and bucket foundation negative pressure technique
  • Method for stabilizing foundation based on electro-osmosis technique and bucket foundation negative pressure technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The implementation environment is beach and sea conditions. The cylindrical foundation 1 is made of concrete material, with a diameter of 6m and a cylinder height of 9m. The diameter of the hole 3 reserved on the top cover plate 2 of the cylinder is 90mm, and a drainage pipe 4 is vertically fixed under the top cover plate 2. , the drain pipe 4 is a plastic pipe; the drain pipe 4 is radially and evenly distributed along the plane of the top cover plate, and the spacing is 1m; the diameter of the drain pipe 4 is 50mm, the length of the drain pipe 4 is from 3m to 9m, and the length of the drain pipe 4 The distribution increases from the reserved hole 3 to the cylinder wall; the wall of the drain pipe 4 is provided with sieve holes 5, the diameter of which is 5mm, and the sieve holes 5 are evenly distributed with a distance of 20mm. An electroosmosis anode 7 is arranged on the inner wall of the cylindrical foundation 1, and an electroosmosis cathode 8 is arranged on the drai...

Embodiment 2

[0021] The implementation environment is 30 meters deep sea water condition, the cylindrical foundation 1 is made of concrete material, the diameter is 12m, the height of the cylinder is 10m, the diameter of the reserved hole 3 on the top cover plate 2 is 100mm, and drainage is fixed vertically under the top cover plate 2 The pipe 4 and the drain pipe 4 are round steel pipes; the drain pipes 4 are evenly distributed radially along the plane of the top cover plate with a distance of 2m; the diameter of the drain pipe 4 is 80mm, the length of the drain pipe 4 is from 4m to 10m, and the drain pipe 4 The length of the drain pipe increases from the reserved hole 3 to the direction of the cylinder wall. The wall of the drain pipe 4 is provided with sieve holes 5. The diameter of the sieve holes 3 is 6mm, evenly distributed, and the distance is 50mm. An electroosmosis anode 7 is arranged on the inner wall of the cylindrical foundation 1, and the drain pipe 4 is an electroosmosis catho...

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Abstract

The invention discloses a method for stabilizing a foundation based on a bucket foundation electro-osmosis technique and a negative pressure technique. The method comprises the following steps of; 1) reserving holes on a cover plate on the bucket top of a bucket foundation, vertically and fixedly connecting a water discharge pipe under the cover plate of the bucket top and reserving sieve pores on the pipe wall, and laying geotextile under the cover plate of the bucket top; 2) arranging an electro-osmosis anode on the inner wall of the bucket foundation and an electro-osmosis cathode on the water discharge pipe and connecting the anode and the cathode with an electro-osmosis water discharge power supply respectively; 3) sucking the bucket foundation by using the reserved holes to form a negative pressure and sinking the bucket foundation under the negative pressure in place; and 4) drawing water and / or air out of the bucket foundation by negative pressure equipment through the water discharge pipe, and stabilizing the foundation under the negative pressure according to the pre-pressing value of the foundation soil. The method has the advantages that: the foundation soil is over-consolidated through the foundation per se by using the electro-osmosis technique and the suction force applied by the negative pressure equipment so as to effectively increase the depth and the width of the foundation stabilization and improve the bearing capacity and the stability of the bucket foundation; and the method also has the advantages of simple equipment, simple and convenient construction, short construction period, obvious economic benefit and low comprehensive construction cost.

Description

Technical field [0001] The invention relates to a foundation reinforcement method in port, ocean, water conservancy and bridge engineering, in particular to a foundation reinforcement method based on electroosmosis and cylinder foundation negative pressure technology. Background technique [0002] At present, foundation reinforcement is very important in port, ocean, water conservancy and bridge engineering, especially for silty soil. The settlement problem of cylindrical foundations as shallow foundations is the main problem in the application of cylindrical foundations. In this area with unfavorable geological conditions, it is difficult for the cylindrical foundation to meet the requirements of bearing capacity and stability, and there are safety problems in use. [0003] Aiming at solving the settlement problem of the cylindrical foundation as a shallow foundation in areas with unfavorable geological conditions, the invention can improve the bearing capacity and stabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/11
Inventor 丁红岩乐丛欢张浦阳
Owner TIANJIN UNIV
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