Settlement control construction method for transverse grouting guide pipe of shallow underground excavation tunnel

A technology of grouting conduit and shallow burial, which is applied in tunnels, tunnel linings, and earth-moving drilling and mining, etc., can solve problems such as losses, and achieve the effects of formation deformation limitation, convenient construction and high feasibility.

Active Publication Date: 2012-07-25
XIAN UNIV OF TECH
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  • Settlement control construction method for transverse grouting guide pipe of shallow underground excavation tunnel
  • Settlement control construction method for transverse grouting guide pipe of shallow underground excavation tunnel
  • Settlement control construction method for transverse grouting guide pipe of shallow underground excavation tunnel

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Embodiment Construction

[0027] Such as figure 1 As shown, a construction method for controlling the settlement of lateral grouting conduits in shallow buried tunnels is carried out in accordance with the following steps:

[0028] Step 1. Lay out the advanced small conduit 1 and the transverse cantilever grouting conduit 2

[0029] Step 1a, the advanced small conduits 1 include a first row of advanced small conduits and a second row of advanced small conduits, the first row of advanced small conduits are arranged along the periphery of the tunnel vault, and the second row of advanced small conduits are arranged along the tunnel arch and the periphery of the arch wall, And it is necessary to set the peripheral layout of the temporary support 4 position of the pilot tunnel.

[0030] The first row of leading small catheters is located above the second row of leading small catheters. The length of the first row of leading small conduits is 2.3m to 2.7m, the circumferential spacing of the conduits is 0.3...

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Abstract

The invention discloses a settlement control construction method for a transverse grouting guide pipe of a shallow underground excavation tunnel. The method includes: laying an advanced small pipe and a horizontal cantilever grouting guide pipe; excavating a middle guide tunnel by a benching tunneling construction method; constructing a middle separation wall and a waterproof layer thereof; and respectively excavating a left guide tunnel, a left tunnel, a right guide tunnel and a right tunnel by the benching tunneling construction method. By the aid of the settlement control construction method, an unconsolidated stratum layer can be effectively consolidated, the soil texture of an unconsolidated stratum is improved, and ground settlement and stratum deformation caused by shallow underground tunnel excavation in the unconsolidated stratum are prevented.

Description

technical field [0001] The invention belongs to the technical field of underground structure construction, and in particular relates to a construction method for controlling the settlement of a lateral grouting conduit of a shallow-buried underground excavation tunnel suitable for a double-cavity tunnel. Background technique [0002] The excavation of shallow buried tunnels in soil strata will cause surface settlement and stratum deformation. When the settlement deformation is too large, it will affect the safety of ground buildings and the normal use of underground pipelines, especially in shallow buried tunnels with loose stratum structures. Excavation is particularly prominent. Usually urban subway tunnels pass through the bustling urban roads with dense ground buildings, heavy ground traffic, and dense underground pipe network, and there are often alluvial loose soil layers in the stratum. In order to ensure the safety of ground buildings and normal traffic, it is requir...

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Application Information

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IPC IPC(8): E21D11/00E21D11/10E21D11/38
Inventor 邵生俊陆斯徐宁飞焦阳阳
Owner XIAN UNIV OF TECH
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