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Microorganism grouting drainage solidification pile and construction method and application thereof

A construction method and microbial technology, applied in infrastructure engineering, soil protection, construction, etc., can solve problems such as the inability to meet the drainage requirements of soft soil foundations, the decline of sand pile drainage performance, and the large amount of cement slurry, and achieve good drainage performance. , small influence, the effect of improving strength

Inactive Publication Date: 2021-01-12
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the cement slurry fills the pores between the sand particles and blocks the drainage channel of the sand pile, the drainage performance of the sand pile is greatly reduced or even lost, which cannot meet the drainage requirements of the soft soil foundation.
In addition, the amount of cement slurry used in grouted sand piles is relatively large, which is neither economical nor environmentally friendly

Method used

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  • Microorganism grouting drainage solidification pile and construction method and application thereof
  • Microorganism grouting drainage solidification pile and construction method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Leveling the site: removing surface planting soil and obstacles;

[0046] (2) Measuring and setting out: According to the coordinates, the specific position of each pile is released and marked;

[0047] (3) The pile driver is in place: the valve-type pile tip is used, and the valve at the pile tip should be tightly closed with hemp rope or iron wire. The gap between the valves should be tight, so that the pile tip is vertically aligned with the center of the pile position;

[0048] (4) Vibration sinking pipe: drive the pile pipe into the predetermined design depth through the vibration piling method;

[0049] (5) Putting gravel and sand: pre-embed the grouting pipe with several holes in the pipe wall in the pile pipe in advance; then put gravel and sand with a height of not less than 2m in the pile pipe, and vibrate for 8s , pull out the pipe while vibrating, stop pulling out and vibrate for 8 seconds after every 0.8m; repeat the above operations (loading gravel and ...

Embodiment 2

[0056] (1) Leveling the site: removing surface planting soil and obstacles;

[0057] (2) Measuring and setting out: According to the coordinates, the specific position of each pile is released and marked;

[0058] (3) The pile driver is in place: the valve-type pile tip is used, and the valve at the pile tip should be tightly closed with hemp rope or iron wire. The gap between the valves should be tight, so that the pile tip is vertically aligned with the center of the pile position;

[0059] (4) Vibration sinking pipe: drive the pile pipe into the predetermined design depth through the vibration piling method;

[0060] (5) Putting gravel and sand: pre-embed the grouting pipe with several holes in the pipe wall in the pile pipe in advance; then put gravel and sand with a height of not less than 2m in the pile pipe, and vibrate for 5s , pull out the pipe while vibrating, stop pulling out and vibrate for 5 seconds after every 0.5m of pulling out; repeat the above operations (lo...

Embodiment 3

[0067] (1) Leveling the site: removing surface planting soil and obstacles;

[0068] (2) Measuring and setting out: According to the coordinates, the specific position of each pile is released and marked;

[0069] (3) The pile driver is in place: the valve-type pile tip is used, and the valve at the pile tip should be tightly closed with hemp rope or iron wire. The gap between the valves should be tight, so that the pile tip is vertically aligned with the center of the pile position;

[0070] (4) Vibration sinking pipe: drive the pile pipe into the predetermined design depth through the vibration piling method;

[0071] (5) Putting gravel and sand: pre-embed the grouting pipe with several holes in the pipe wall in the pile pipe in advance; then put gravel and sand with a height of not less than 2m in the pile pipe, and vibrate for 10s , pull out the pipe while vibrating, stop pulling out and vibrate for 10s after every 1.0m of pulling out; repeat the above operations (loading...

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Abstract

The invention relates to the technical field of foundation reinforcement, in particular to a microorganism grouting drainage solidification pile and a construction method and application thereof. A gravel sand pile is obtained through a vibration pipe sinking pile forming method; and a microorganism bacteria solution and a nutrient solution are injected into the gravel sand pile, precipitation ofcalcium carbonate is induced through microorganisms to solidify gravel and sand into a pile, and cementing and solidifying are carried out on a foundation around the pile to obtain the microorganism grouting drainage solidification pile. According to the microorganism grouting drainage solidification pile, the microorganism induced calcium carbonate precipitation technology is utilized, and generated calcium carbonate, gravel and sand are solidified into the pile through the bonding effect of microorganisms; and on one hand, the bearing capacity of the pile is improved, on the other hand, calcium carbonate generated by microorganisms is cemented with gravel and sand, but does not fill pores among sand particles, the pile maintains excellent drainage performance, and is economical and environment-friendly, materials are convenient to take, and the manufacturing cost is low.

Description

technical field [0001] The invention relates to the technical field of foundation reinforcement, in particular to a microbial grouting drainage curing pile and its construction method and application. Background technique [0002] Bulk piles refer to piles without cohesive strength, and loose piles include gravel piles and sand piles. Among them, the gravel pile is a composite foundation reinforcement pile made of gravel (pebble) as the main material. The filling material of the crushed stone pile is directly used continuously graded crushed stone, and the maximum particle size is controlled at about 40mm. When using non-viscous bulk materials such as stones, sand, etc. as the main material to fill the piles formed in the existing holes in the foundation, and use the formed piles and the surrounding soil to jointly bear the upper load, through this The foundation formed by the processing method is called the composite foundation of bulk piles, and the pile body formed is c...

Claims

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Application Information

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IPC IPC(8): E02D3/00E02D3/08E02D3/12
CPCE02D3/00E02D3/08E02D3/12
Inventor 肖雪莉梁仕华钟宙卢晓燕范楚灿
Owner GUANGDONG UNIV OF TECH
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