Anti-surge grouting material for shield construction in mylonite broken zone and its preparation method

A technology of grouting material and broken zone, which is applied in the field of anti-surge grouting material and its preparation for shield tunneling construction in the broken zone of mylonite, which can solve the problem of high water content in the broken zone, inconvenience in engineering construction, and the problem of plugged grouting pipes. To achieve the effect of improving workability and durability, reducing ground subsidence, and filling the gap in the tail of the shield

Active Publication Date: 2019-04-09
CHINA RAILWAY 16 BUREAU GRP BEIJING METRO ENG CONSTR +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing grouting materials use cement, fly ash, bentonite, sand, etc. as the main raw materials. When this kind of grouting material is used in the structural fracture zone, the grout is easily lost due to the high water content and the development of cracks in the structural fracture zone. , or even plug the grouting pipe, causing inconvenience to the construction

Method used

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  • Anti-surge grouting material for shield construction in mylonite broken zone and its preparation method
  • Anti-surge grouting material for shield construction in mylonite broken zone and its preparation method
  • Anti-surge grouting material for shield construction in mylonite broken zone and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The anti-surge slurry material used in the mylonite fragmentation zone shield construction process of the present invention, prepares the described slurry material according to a specific mass ratio (kg) in the test process, and consists of the following parts by weight:

[0029]

[0030] The compound method of described slurry material comprises the following steps:

[0031] Step 1, taking the required raw materials according to the mass ratio;

[0032] Step 2, one day in advance, prepare bentonite slurry according to the mass ratio of bentonite: water = 1:1 (the water used is the water weighed in step 1), and place the prepared bentonite slurry for 24 hours to prepare the required grouting Material;

[0033] Step 3, mixing and stirring the cement, fly ash, sand, and polypropylene fibers weighed in step 1, and configuring them into a mixed powder of the raw materials;

[0034] Step 4, add the mixed powder described in step 3 and the remaining water to the mortar m...

Embodiment 2

[0038] The anti-surge slurry material used in the mylonite fragmentation zone shield construction process of the present invention, prepares the described slurry material according to a specific mass ratio (kg) in the test process, and consists of the following parts by weight:

[0039]

[0040]

[0041] The compound method of described slurry material comprises the following steps:

[0042] Step 1, taking the required raw materials according to the mass ratio;

[0043] Step 2, one day in advance, prepare bentonite slurry according to the mass ratio of bentonite: water = 1:1 (the water used is the water weighed in step 1), and place the prepared bentonite slurry for 30 hours to prepare the required grouting Material;

[0044] Step 3, mixing and stirring the cement, fly ash, sand, and polypropylene fibers weighed in step 1, and configuring them into a mixed powder of the raw materials;

[0045] Step 4, add the mixed powder described in step 3 and the remaining water to ...

Embodiment 3

[0049] The anti-surge slurry material used in the mylonite broken zone shield construction process of the present invention, according to specific mass proportion (kg) preparation described slurry material in the test process, is made up of following parts by weight:

[0050]

[0051] The compound method of described slurry material comprises the following steps:

[0052] Step 1, taking the required raw materials according to the mass ratio;

[0053] Step 2, one day in advance, prepare bentonite slurry according to the mass ratio of bentonite: water = 1:1 (the water used is the water weighed in step 1), and place the prepared bentonite slurry for 48 hours to prepare the required grouting Material;

[0054] Step 3, mixing and stirring the cement, fly ash, sand, and polypropylene fibers weighed in step 1, and configuring them into a mixed powder of the raw materials;

[0055] Step 4, add the mixed powder described in step 3 and the remaining water to the mortar mixer successi...

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Abstract

The invention provides a grouting material for surge prevention in the mylonite crushing zone shield construction and a preparation method thereof. The material comprises the following components in percentage by weight: 6-10 percent of cement, 14-18 percent of fly ash, 12-16 percent of bentonite, 12-16 percent of sand, 0.03-0.06 percent of air entraining agent, 0.02-0.06 percent of fiber and 40-45 percent of water. The grouting material provided by the invention has the benefits that the proportion of various raw materials in parts by weight can be adjusted; as the polypropylene fibers are added as fiber curing agents, the consistency and the tensile property of the grouting material are enhanced by utilizing the adhesiveness of the fibers; meanwhile, as the air entraining agent is added, the workability of the grouting material is enhanced.

Description

technical field [0001] The invention relates to a grout material for synchronous grouting during construction in the field of underground engineering, in particular to an anti-surge grouting material for shield construction in a broken mylonite zone and a preparation method thereof. Background technique [0002] With the rapid development of social economy, a large number of urban rail transit, high-speed railway, and underground buildings have emerged. As one of the main construction methods of underground structures, the shield method plays an important role in the construction of underground structures. When the shield construction method passes through the structural fracture zone, due to the high water content of the mylonite fracture zone, the cracks develop, and as the shield construction progresses, the formation water gushes along the shield tail gap, and the water pressure is relatively high, resulting in the shield tunnel construction. During the grouting process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B111/70
CPCC04B28/04C04B2111/70C04B18/08C04B14/104C04B14/06C04B2103/304C04B22/002C04B16/0633
Inventor 武铁路蔡连利高宪民周阳宗赵守宪刘永吴琼沈水龙吕海敏顾长明张健白艳峰王涛杨成
Owner CHINA RAILWAY 16 BUREAU GRP BEIJING METRO ENG CONSTR
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