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Squeezing weak surrounding rock tunnel prestressed anchor cable group support structure and construction technology

A prestressed anchor cable and weak surrounding rock technology, which is applied in the installation of anchor bolts, mining equipment, earthwork drilling and mining, etc., can solve the problems of delay in the construction period of reinforcing anchor cables, lack of systematic layout, etc., and reduce the risk of surrounding rock collapse risk, improving the internal force of surrounding rock, reducing the growth rate and the effect of deformation accumulation

Pending Publication Date: 2017-12-22
CHINA RAILWAY 11TH BUREAU GRP +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a prestressed anchor cable for extruded weak surrounding rock tunnels in view of the lack of systematic arrangement of anchor cable support measures for existing extruded weak surrounding rock tunnels, and delays in the construction period caused by reinforced anchor cables. Group support structure and construction technology

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  • Squeezing weak surrounding rock tunnel prestressed anchor cable group support structure and construction technology
  • Squeezing weak surrounding rock tunnel prestressed anchor cable group support structure and construction technology
  • Squeezing weak surrounding rock tunnel prestressed anchor cable group support structure and construction technology

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] see Figure 1 to Figure 2 , an extrusion-type weak surrounding rock tunnel prestressed anchor cable group support structure, including the arch speed control anchor cable 1, the side wall speed control anchor cable 2, the arch limit anchor cable 3, the side wall limit anchor cable 4. Arch locking foot anchor cable 5, side wall locking foot anchor cable 6, primary support 7 of the first layer and primary support 8 of the second layer. The first layer of primary support 7 is a conventional primary support, and the first layer of primary support 7 includes a first layer of steel arches, and the first layer of steel arches is buried in spray concrete; The second layer of primary support 8 is a conventional primary support, and the second layer of primary support 8 includes a second layer of steel arches, and the second layer of st...

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Abstract

The invention relates to a squeezing weak surrounding rock tunnel prestressed anchor cable group support structure and a construction technology. The support structure comprises arch speed control anchor cables (1), side wall speed control anchor cables (2), arch limiting anchor cables (3), side wall limiting anchor cables (4), arch locking anchor cables (5), side wall locking anchor cables (6), a first layer primary support (7) and a second layer primary support (8); all anchor cables in the construction technology adopt drilling and grouting simultaneously, however, reserved tensioning is conducted according to times, batches and parts. Controlling release on surrounding rock stress is achieved, the surrounding rock deformation growth rate and deformation accumulation amount are lowered, large deformation is effectively controlled, steel arch centering replacement caused by too large deformation is avoided, and the surrounding rock collapse hazard is lowered; in addition, the work efficiency is improved, constructors can conduct drilling conveniently, and it is guaranteed that the anchor cable positions are accurate, and tensioning can be conducted in time.

Description

technical field [0001] The present invention relates to a tunnel prestressed anchor cable group support structure and construction technology, more specifically to an extruded weak surrounding rock tunnel prestressed anchor cable group support structure and construction technology, which belongs to the extruded surrounding rock The field of tunnel technology. Background technique [0002] Extrusion-type weak surrounding rock tunnels have the characteristics of large amount of deformation, fast deformation rate, long deformation time, and wide range of disturbance influence during excavation, and have obvious rheological characteristics in the later stage. Because the prestressed anchor cable can change the internal force state of the surrounding rock through prestress and play a certain role in controlling the deformation, so the anchor cable support is usually used to control the deformation of the tunnel at present. However, due to the large amount of deformation and long...

Claims

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Application Information

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IPC IPC(8): E21D21/00E21D20/02
CPCE21D20/02E21D21/0053
Inventor 熊晓晖王更峰张旭东唐达昆刘国雄何磊夏明锬陈龙王永太张晓晓李行利徐浩然吴占瑞汪靖
Owner CHINA RAILWAY 11TH BUREAU GRP
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