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Compacting grouting method

A technology of compaction grouting and grouting, which is applied in the field of compaction grouting, can solve problems such as uneven stress on subways, low operating efficiency, uneven subway tracks, etc., to improve grouting efficiency, ensure safety, and structure stable effect

Active Publication Date: 2018-05-08
GUANGZHOU METRO DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing compaction grouting technology scheme adopts single-hole grouting operation, and the operation efficiency is low, and the distribution of grouting holes is unreasonable. After that, grouting is performed randomly or in a certain order in each grouting hole, and the grouting holes The amount of grouting and the time of grouting are inconsistent. In summary, it is easy to lead to inconsistent structures on both sides of the tunnel after reinforcement, which makes the subway track uneven and affects the operation of the train due to uneven force during the operation of the subway.

Method used

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  • Compacting grouting method

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing and embodiment the technical solution of the present invention is further described:

[0037] like figure 1 As shown, the compaction grouting method in the present embodiment comprises the following steps:

[0038] 1) Drill grouting holes on the standard block of the ring segment 1, the grouting holes include the first group of grouting holes 2, the second group of grouting holes 3 and the third group of grouting holes distributed sequentially from bottom to top 4. Taking the plane passing through the center axis of the tunnel and the center line of the rail as the reference plane, the first group of grouting holes 2, the second group of grouting holes 3 and the third group of grouting holes 4 each include two reference planes It is called distributed grouting holes. It should be pointed out that during the process of drilling grouting holes, the distribution of steel bars under the ground needs to be surveyed, and the pos...

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Abstract

The invention provides a compacting grouting method. The compacting grouting method comprises the following steps of drilling grouting holes in a standard block of an annular pipe sheet, wherein the grouting holes comprise the first set of grouting holes, the second set of grouting holes and the third set of grouting holes which are symmetrically distributed from bottom to top in sequence; installing sleeve valve pipes in all the grouting holes, and installing one-way valves at the upper ends of the sleeve valve pipes; adopting rapid hardening cement mortar to seal the gaps formed by outer walls of the grouting holes and the outer walls of the sleeve valve pipes; conducting symmetric grouting on the first set of grouting holes, the second set of grouting holes and the third set of groutingholes from bottom to top in sequence; after grouting is finished, checking the grouting effect, and conducting hole patching grouting for unqualified sections; after grouting construction is finished, immediately cleaning the sleeve valve pipes, a grouting machine and an agitator. By means of the compacting grouting method, the grouting efficiency can be improved, and the stability of structuresof the two sides of a tunnel is guaranteed, so that a subway is steadily run.

Description

technical field [0001] The invention relates to the technical field of compaction grouting, in particular to a compaction grouting method. Background technique [0002] The Huangsha-Changshou Road section of Guangzhou Metro Line 1 is a shield tunnel section, and the foundation pit and pile foundation of the project construction are close to the station and the section tunnel. Since January 2011, it has been found that there are many longitudinal cracks in the segment at the top of the K5+400~K5+483 tunnel at 10 o'clock~12 o'clock (facing the Huangsha Station). Running through the entire segment, the maximum crack width is approximately 0.58mm; most of the segments have longitudinal cracks at K5+411~K5+480 at 12 o'clock to 3 o'clock (facing Huangsha station), and the cracks are roughly in line with The descending lines are distributed in a mirror image. Among them, the segment cracking at 12 o'clock to 1 o'clock at K5+440 is more serious, and the maximum crack width is abou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/10
Inventor 翟利华农兴中王凌柳宪东顾锋阚少德卢小莉陈彦晖朱文彬何冠鸿袁泉阳彬武黄子进陈晓岚韦永美祝徐敏欧林夏
Owner GUANGZHOU METRO DESIGN & RES INST
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