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Ground fracture crushed zone passing construction method for shallow-buried tunnel excavation

A technology of shallow burial and underground excavation and construction method, which can be used in tunnels, tunnel linings, underground chambers, etc., and can solve problems such as difficult construction.

Active Publication Date: 2017-02-22
中铁二十局集团第五工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But now, there are very few construction materials for reference in the construction of shallow-buried tunnels passing through the broken ground fissure zone, and the construction is difficult

Method used

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  • Ground fracture crushed zone passing construction method for shallow-buried tunnel excavation
  • Ground fracture crushed zone passing construction method for shallow-buried tunnel excavation
  • Ground fracture crushed zone passing construction method for shallow-buried tunnel excavation

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Embodiment Construction

[0060] Such as figure 1 The construction method of a shallow-buried and concealed tunnel passing through a ground fissure broken zone is shown. The shallow-buried and concealed tunnel to be constructed includes a left-line tunnel 7 and a right-line tunnel 8 arranged on the right side of the left-line tunnel 7. The left-line tunnel 7 and the right-line tunnel 8 are laid in parallel and they are connected by a cross channel 9, see figure 2 The construction of the shallow-buried and concealed tunnel is a tunnel that passes through the ground fissure broken zone, the ground fissure broken zone is a broken zone with ground fissures; the horizontal passage 9 is a straight tunnel, the left tunnel 7 and the right tunnel The tunnel 8 is divided into two tunnel sections by a cross passage 9. The two tunnel sections are respectively a first tunnel section and a second tunnel section. The first tunnel section of the left tunnel 7 and the right tunnel 8 The first section of the tunnel is lo...

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Abstract

The invention discloses a ground fracture crushed zone passing construction method for shallow-buried tunnel excavation. A constructed shallow-buried excavation tunnel comprises a left line tunnel and a right line tunnel which are communicated through a transverse channel. During construction of the constructed shallow-buried excavation tunnel, the method comprises the steps that 1, transverse channel construction is performed; 2, tunnel construction is performed, wherein the two tunnel sections of the left line tunnel and the right line tunnel are constructed through the transverse channel, the construction is performed in the mode of multiple tunnel sections in the longitudinal extending direction of the tunnel from back to from during construction of any one tunnel section, and the construction of any one tunnel section includes the processes of ground fracture judgement, tunnel excavation and synchronous preliminary bracing construction, concrete protection layer construction, post-cast strip retention judgement, secondary tunnel lining construction and post-cast strip construction. The method includes simple steps and is reasonable in design, convenient to construct, good in construction effect, capable of simply and conveniently completing the shallow-buried tunnel excavation construction process of a ground fracture crushed zone and safe and reliable in construction process.

Description

Technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a construction method for a shallow buried tunnel to pass through a ground fissure broken zone. Background technique [0002] Ground fissure is the abbreviation of ground fissure, which is caused by natural factors (crustal activity, water action, etc.) or man-made factors (pumping, irrigation, excavation, etc.) on the surface rock layer and soil, and forming a certain length on the ground A macroscopic surface destruction phenomenon of cracks with width and width. Fracture zone refers to the rock zone destroyed by non-directional cracks and fissures; the fissures may be filled with minerals and have a network-like vein, or they may be roughly equivalent to fracture zones. Ground fissure broken zone refers to a broken zone with ground fissures (that is, cracks on the ground). [0003] Compared with the open excavation method, the construction of the subway tunn...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D9/14E21D11/10
CPCE21D9/00E21D9/14E21D11/10E21D11/107
Inventor 宁振国梁缄鑫万昌盛曹佳斌李朝成冯艳娜刘晓宁
Owner 中铁二十局集团第五工程有限公司
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