Construction method of layer-built grouting of existing structures adjacent to tunnel by advanced same-hole multiple ducts

A technology with existing structures and construction methods, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as slow drilling of grouting holes, poor matching of oil grouting technology and equipment, and influence on urban subway construction, etc., to avoid The effect of the collapse accident

Active Publication Date: 2018-09-18
BEIJING MUNICIPAL ROAD & BRIDGE
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on the current status of advanced curtain grouting construction technology in my country, it is not difficult to find that the oil grouting technology and equipment are poorly equipped, the grouting process is relatively backward, the grouting hole drilling is slow, the face (grouting wall) is time-consuming, and grouting in sections Problems such as low efficiency seriously restrict the effect of grouting and become a major bottleneck affecting the construction of urban subways
In addition, the existing grouting technology is mainly based on splitting and extrusion grouting caused by the pressure of the grouting machine, supplemented by penetration. In cities with intricate underground pipelines, it is easy to cause uplifts and uplifts of pipelines and road surfaces.

Method used

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  • Construction method of layer-built grouting of existing structures adjacent to tunnel by advanced same-hole multiple ducts
  • Construction method of layer-built grouting of existing structures adjacent to tunnel by advanced same-hole multiple ducts
  • Construction method of layer-built grouting of existing structures adjacent to tunnel by advanced same-hole multiple ducts

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Embodiment Construction

[0026] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] 1. Grouting range and hole layout design

[0028] The grouting range of the tunnel section is 4.5m outside the tunnel excavation contour. The grouting section is 12.0m, and the grouting wall is set before the grouting hole.

[0029] Hole spacing: the grouting holes outside the tunnel arch line are arranged within 500mm of the tunnel excavation contour line, the distance between the conduits along the arch line is 0.5m; the distance between the holes on the tunnel face is 1.0m.

[0030] The number of grouting holes, drilling angle and length of installation conduit: a total of 35 points are arranged in the grouting section, and a total of 23 points are arranged for grouting outside the arch line. Further, each of the 23 points for grouting outside the arch line There are 4 rows of inclined holes and ...

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Abstract

The invention discloses a construction method of layer-built grouting of existing structures adjacent to a tunnel by advanced same-hole multiple ducts. The method comprises the following steps that 1,the grouting range and hole location arrangement are designed; 2, an inclined shaft support is removed; 3, tunnel integral construction is carried out; and 4, drill holes and small ducts are installed and grouted. The construction method directly transports slurry to the designated position with advanced small pipes similar to the distribution shape of branches, the role of skeleton is achieved at the same time, rapid and efficient grouting is achieved, small pressure is used for avoiding the impact of large pressure on a pipeline and ensure that the ground settlement or uplift is in the absolute safety range.

Description

technical field [0001] The invention belongs to the technical field of advanced curtain grouting construction for tunnels, and relates to an advanced layered grouting construction method for tunnels adjacent to existing structures with the same hole and multiple conduits. Specifically, it relates to a tunnel adjacent to existing structures based on advanced curtain grouting technology An advanced layered grouting construction method with multiple conduits in the same hole. Background technique [0002] At present, with the rapid development of society and the acceleration of urbanization, the construction of domestic transportation network is in the stage of vigorous development, especially in some big cities including provincial capitals. Construction is in full swing, with the vast majority using underground excavation. In this way, it is inevitable to pass through unfavorable geological zones such as weak and water-rich strata. The usual solution is to use advanced curta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/105
Inventor 胡敏宋战平曹智淋赵迎王西波谭文浩麻海涛孙文龙蔡玮李会靳军周鹏远
Owner BEIJING MUNICIPAL ROAD & BRIDGE
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