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Vibration reduction synchronous grouting system and grouting method for shield under-penetrating building structure

A technology of simultaneous grouting and shield tunneling, applied in underground chambers, earthwork drilling, wellbore lining, etc., can solve the problems of soil subsidence, segment misalignment, segment water seepage, etc., to control the floating of the tunnel and control the deformation. , the effect of preventing clogging

Pending Publication Date: 2021-12-07
CHINA TIESIJU CIVIL ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the maximum cutting diameter of the shield cutter head is larger than the outer diameter of the segment, when the shield tail is separated from the segment, an annular space will be formed between the tunnel segment and the soil. If it cannot be filled in time, the segment will seep and the soil will subside seriously. dislocation

Method used

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  • Vibration reduction synchronous grouting system and grouting method for shield under-penetrating building structure
  • Vibration reduction synchronous grouting system and grouting method for shield under-penetrating building structure
  • Vibration reduction synchronous grouting system and grouting method for shield under-penetrating building structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 of the present application provides a synchronous grouting system for vibration reduction of structures under shield tunneling, including an air compressor 4, an accelerator collection bucket 5, a rubber powder collection bucket 6, an additive pipeline 12, and a step-by-step grouting system. Pipeline 13, valve 21 of quick-setting agent collection bucket, valve 22 of rubber powder collection bucket. The quick-setting agent and the rubber powder are placed in a collection bucket, and the collection bucket is separated into a quick-setting agent collection bucket 5 and a rubber powder collection bucket 6, so that the quick-setting agent is separated from the rubber powder. The connection between the bottom of the quick-setting agent collection bucket 5 and the bottom of the rubber powder collection bucket 6 and the additive pipeline 12 is respectively equipped with an accelerator collection bucket valve 21 and a rubber powder collection bucket valve 22 to contr...

Embodiment 2

[0046] Embodiment 2 of the present application provides a grouting method for a synchronous grouting system for vibration reduction and synchronous grouting of structures under shield tunneling, including the following steps:

[0047] S1. Connect the synchronous grouting pipeline 13 and the additive pipeline 12 in parallel, and open the grouting port. Fix the synchronous grouting pipeline 13 and the additive pipeline 12 at the shield tail brush 7, close the synchronous grouting pipeline valve, the quick-setting agent collection bucket valve 21 and the rubber powder collection bucket valve 22, and prepare for subsequent grouting.

[0048] S2. Prepare synchronous grouting liquid. The synchronous grouting liquid should be single liquid grouting. The synchronous grouting liquid is 100 parts of cement, 175 parts of fly ash, 175 parts of standard sand, 120 parts of bentonite, 15 parts of water reducer, water 400 copies. Prepare quick-setting agent and rubber powder. The quick-setti...

Embodiment 3

[0058] In Example 3 of the present application, cement, fly ash, standard sand, bentonite, water, water reducer, and rubber powder were mixed according to different proportions. According to the feeding sequence of aggregate, cement, fly ash, special soil, water, and admixture, each raw material is slowly and evenly put into the cement mortar mixer in turn, and the synchronous grouting material is obtained by mixing evenly. The fluidity of synchronous grouting material was measured by standard slump tube test, the strength of grouting test block was measured by uniaxial compressive strength test, and the elastic modulus of cemented grouting material was measured by mortar elastic modulus tester. The comparison and test results are shown in the table below.

[0059] Table 1 Aggregate ratio and test results

[0060]

[0061] It can be seen from group 1 and group 4 that the addition of rubber powder weakens the fluidity of the mortar to a certain extent, increases the compres...

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Abstract

The invention relates to a vibration reduction synchronous grouting system for a shield under-penetrating buildings structure. The vibration reduction synchronous grouting system comprises an air compression device, an accelerator collecting barrel, a rubber powder collecting barrel, an additive pipeline and a synchronous grouting pipeline. Accelerating agents and rubber powder are placed in the material collecting barrel, and the middle of the material collecting barrel is separated into an accelerating agent material collecting barrel and a rubber powder material collecting barrel. An independent additive pipeline is arranged on one side of a synchronous grouting pipeline of the shield tunneling machine, the synchronous grouting pipeline and the additive pipeline are fixed to a shield tail brush, and the synchronous grouting pipeline and the additive pipeline are consistent in trend and are fixed at an outlet through a double-pipe buckle. The system has the beneficial effects that the independent additive pipeline is arranged on one side of the synchronous grouting pipeline of the shield tunneling machine, injection can be conducted only by opening a valve, the process is synchronously conducted in the shield tunneling process, and the problem of floating in the construction stage can be well controlled by grouting holes of a soil layer and pipe pieces and reinforcing the strength of the soil layer.

Description

technical field [0001] The invention relates to the field of tunnel construction, and in particular to a synchronous grouting system for vibration reduction of structures passing under shield tunnels, which is suitable for grouting tunnels under shield tunnels, especially in areas where vibration control is very strict, such as residential areas and hospitals. Background technique [0002] Urban rail transit is the development direction of modern city construction. Rail transit is of great significance to solve the traffic congestion in big cities and promote the development of the upstream and downstream along the subway. It is favored by the general public for its punctuality and convenience, but the vibration and noise problems it brings also plague the residents along the subway. Life, the vibration problem caused by train operation needs to be solved urgently. "Urban Regional Environmental Vibration Standards" stipulates: "The standard value of Z vibration level in the...

Claims

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Application Information

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IPC IPC(8): E21D11/10
CPCE21D11/105
Inventor 赵星星李海波郝建雷狄鹏刘晓波朱洪健张永南杨吉胡帅李治家张驰
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD