Stiff composite pile construction method adopting microbial diagenesis

By spraying microbial diagenetics into the cement soil, the distribution density of calcium carbonate precipitation is regulated, and the problem of low curing efficiency of cement or sand soil in the prior art is solved, and the load bearing performance of pile foundations is significantly improved.

CN120026615APending Publication Date: 2025-05-23JIANGSU TONGJINXIN CONSTR ENG TECH CO LTD
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Patent Information

Application Number
CN202510311560.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-17
Publication Date
2025-05-23

AI Technical Summary

Technical Problem

The prior art is difficult to effectively improve the curing efficiency of cement or sand, which affects the bearing performance of pile foundations.

Method used

Microbial diagenetics are used to spray them into cement soil through the infusion pipeline, and spray them in layers to regulate the distribution density of calcium carbonate precipitation, so as to achieve differentiated strength and permeability in different areas of the pile body.

Benefits of technology

The sand and soil curing efficiency is significantly improved by more than 30%, and the load bearing performance of the pile foundation is greatly improved.

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Abstract

The invention discloses a method for constructing a stiff composite pile by adopting microbial diagenesis, which comprises the following steps of: constructing a cement soil peripheral pile and a core pile, and spraying a microbial diagenesis agent into cement soil through a liquid conveying pipeline when the cement soil peripheral pile is constructed. The sand solidification efficiency is improved by 30% or above, and the pile foundation bearing performance is greatly improved.
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Description

Technical Field

[0001] The invention relates to a method for constructing a rigid composite pile. Background Art

[0002] Reinforced composite piles are core piles inserted into mixed cement soil. As a type of pile with excellent performance, they have been widely used in engineering projects. However, how to further improve the solidification efficiency of cement soil or sand is a field that needs further research. Summary of the invention

[0003] The object of the present invention is to provide a method for constructing a strong composite pile using microbial diagenesis, which can effectively improve the solidification efficiency of cement soil or sand soil.

[0004] The technical solution of the present invention is: A method for constructing a rigid composite pile using microbial diagenesis includes the construction of cement soil peripheral piles and core piles. The method is characterized in that during the construction of the cement soil peripheral piles, a microbial diagenetic agent is sprayed into the cement soil through a liquid delivery pipeline.

[0005] By injecting microbial diagenetic agents in layers, the distribution density of calcium carbonate precipitation can be regulated to achieve differentiated strength and permeability in different areas of the pile body.

[0006] The microbial diagenetic agent is composed of the following components in the following dosage ratios: Solution A: Bacillus pasteurianus suspension: 10 8 CFU / mL, 1 L Urea: 20 g / L Yeast extract: 5 g / L Phosphate buffer pH 9.0: appropriate amount Solution B: Calcium chloride: 22.2 g / L Deionized water: 1 L.

[0007] The present invention improves the sand solidification efficiency by more than 30%, and greatly improves the bearing capacity of the pile foundation.

[0008] The present invention will be further described below in conjunction with the embodiments. DETAILED DESCRIPTION

[0009] A method for constructing a rigid composite pile using microbial diagenesis includes the construction of cement soil peripheral piles and core piles. During the construction of the cement soil peripheral piles, a microbial diagenetic agent is sprayed into the cement soil through a liquid delivery pipeline.

[0010] By injecting microbial diagenetic agents in layers, the distribution density of calcium carbonate precipitation can be regulated to achieve differentiated strength and permeability in different areas of the pile body.

[0011] The microbial diagenetic agent is composed of the following components in the following dosage ratios: Solution A: Bacillus pasteurianus or Bacillus megaterium suspension: 10 8 CFU / mL, 1 L Urea: 20 g / L Yeast extract: 5 g / L Phosphate buffer pH 9.0: appropriate amount Solution B: Calcium chloride: 22.2 g / L Deionized water: 1 L.

Claims

1. A method for constructing a rigid composite pile using microbial diagenesis, including the construction of cement soil peripheral piles and core piles, characterized in that: During the construction of cement soil peripheral piles, the microbial diagenetic agent is sprayed into the cement soil through the infusion pipeline.

2. The method for constructing a strong composite pile using microbial diagenesis according to claim 1 is characterized in that: By injecting microbial diagenetic agents in layers, the distribution density of calcium carbonate precipitation can be regulated to achieve differentiated strength and permeability in different areas of the pile body.

3. The method for constructing a strong composite pile using microbial diagenesis according to claim 1 or 2, characterized in that: The microbial diagenetic agent is composed of the following components in the following dosage ratios: Solution A: Bacillus pasteurianus suspension: 10 8 CFU / mL, 1 L Urea: 20 g / L Yeast extract: 5 g / L Phosphate buffer pH 9.0: appropriate amount Solution B: Calcium chloride: 22.2 g / L Deionized water: 1 L.