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Bio-enzyme curing material and cured silty soil roadbed combination part and construction process for reinforcing roadbed by sand compaction piles

A solidification material and bio-enzyme technology, which is applied in infrastructure engineering, roads, roads, etc., can solve the problems of difficulty in widening old and new roadbeds in silty soil, instability of roadbeds at the widening area, etc., to ensure stability and vehicle driving safety performance, ease the pressure on traffic services, and reduce the effect of liquefaction

Pending Publication Date: 2020-08-07
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned problems, the present invention aims to solve the problem that the width of the new and old silt roadbeds is difficult to deal with and the roadbed is unstable at the width of the roadbed. The biological enzyme material is used to solidify the junction of the old and new silty soil roadbeds and to solidify the compacted sand piles to reinforce the roadbed base. Method and Construction Technology

Method used

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  • Bio-enzyme curing material and cured silty soil roadbed combination part and construction process for reinforcing roadbed by sand compaction piles
  • Bio-enzyme curing material and cured silty soil roadbed combination part and construction process for reinforcing roadbed by sand compaction piles
  • Bio-enzyme curing material and cured silty soil roadbed combination part and construction process for reinforcing roadbed by sand compaction piles

Examples

Experimental program
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Effect test

Embodiment 1

[0075] A biological enzyme material acting on the silty roadbed, that is, the biological enzyme in the A-type biological enzyme material consists of 20 parts of iron bacteria and 20 parts of carbonate mineralizing bacteria.

[0076] The above-described A-type biological enzyme material preparation process comprises the following steps:

[0077] Step 1) select iron bacteria as the target strain, and prepare for activation in the medium for the next step.

[0078] Step 2) Prepare 300mL iron bacteria culture solution and place it in a spherical bottle. After sterilization, use an inoculation loop to pick some strains into the culture solution. Finally, put it into a constant temperature shaking incubator with a temperature of 35° C. and a rotation speed of 180 rpm.

[0079] The nutrient solution is characterized in that the following ingredients are prepared in parts by weight:

[0080] Ferric ammonium citrate solid, 40 parts of ferric ammonium citrate liquid with a concentrati...

Embodiment 2

[0093] A biological enzyme material acting on silt roadbed, that is, type A biological enzyme material is composed of 30 parts of iron bacteria and 20 parts of carbonate mineralizing bacteria, and is used for shear strength tests of new and old silty soils, unconfined compression Stiffness test. After testing, the OD600 value of type A biological enzyme material is 1.0, and the enzyme activity value of type A biological enzyme material is 10ms / cm / min.

[0094] The biological enzyme immobilized material, that is, the sample preparation method of type A biological enzyme material and the method of applying type A biological enzyme immobilized material to sample preparation and new and old silt tests are the same as in Example 1.

Embodiment 3

[0096]A biological enzyme material acting on silt roadbed, that is, A-type biological enzyme material is composed of 40 parts of iron bacteria and 20 parts of carbonate mineralizing bacteria, which is used for shear strength tests of new and old silty soils, unconfined compression Stiffness test. After testing, the OD600 value of type A biological enzyme material is 1.2, and the enzyme activity value of type A biological enzyme material is 14ms / cm / min.

[0097] The biological enzyme immobilized material, that is, the sample preparation method of type A biological enzyme material and the method of applying type A biological enzyme immobilized material to sample preparation and new and old silt tests are the same as in Example 1.

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Abstract

The invention belongs to the field of road engineering, and relates to a bio-enzyme curing material and cured silty soil roadbed combination part and a construction process for reinforcing a roadbed by a sand compaction pile, which comprises the following steps of expanding and culturing a bio-enzyme material in advance, widening a new silty soil roadbed and an old silty soil roadbed by using thebio-enzyme material, and constructing the sand compaction pile. The bio-enzyme is an A-type bio-enzyme material composed of iron bacteria and carbonate mineralizing bacteria and a B-type bio-enzyme material composed of urease. The invention innovatively solves the problems that the joint of the new and old silt subgrade is difficult to treat and the compacted sand pile is difficult to reinforce; the old road is still kept in an operation state; the new roadbed is subjected to widening construction, traffic pressure is relieved, differential settlement of the new roadbed and the old roadbed iseffectively reduced, the shear strength of a soil body is improved, the integrity of the new roadbed and the old roadbed is guaranteed, the advantages of being environmentally friendly, easy to operate and high in construction workability are achieved, innovation of the construction technology and progress of the traffic engineering field are facilitated, and more value is created.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a method and a construction process for using biological enzyme materials to solidify the junction of old and new silty soil roadbeds and reinforcing the roadbed base with solidified compacted sand piles. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the rapid development of the national economy and society and the improvement of people's living standards, residents' demand for transportation is increasing rapidly. At present, some of the highways built in the early stage of our country can no longer meet the traffic demand, and traffic congestion has appeare...

Claims

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Application Information

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IPC IPC(8): E01C3/00E01C3/04E02D3/00E02D3/08E02D3/12C12N1/20
CPCC12N1/20E01C3/00E01C3/04E02D3/005E02D3/08E02D3/12E02D3/123
Inventor 李晋李翔左珅姜鹏崔新壮于淼章
Owner SHANDONG JIAOTONG UNIV