Temporary transverse support constructed in benching tunneling method and installation method of temporary transverse support

A technology of horizontal bracing and step method, applied in tunnels, tunnel linings, shaft equipment, etc., can solve the problems that horizontal bracing cannot be reused, a large amount of construction waste and scrap steel, and the installation process takes a long time, so as to reduce the need for installation experience. , The effect of low installation efficiency and difficult installation

CN111396094APending Publication Date: 2020-07-10CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-07-10

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Abstract

The invention discloses a temporary transverse support constructed in a benching tunneling method and an installation method of the temporary transverse support. The position of the transverse chord line of a main hole steel arch is supported by the temporary transverse support, the two ends of the temporary transverse support are connected with the main hole steel arch, the temporary transverse support is a prefabricated rod-shaped transverse support and comprises a middle section and two movable sections, the two movable sections are hinged to the two ends of the middle section and can rotate around hinging points and be fixed to the positions perpendicular to the middle section and coaxial with the middle section. The temporary transverse support has the advantages that the temporary transverse support is suitable for the benching tunneling method, convenient and quick to construct, install and detach, reusable, capable of reducing cost and the like, the installation method using the above temporary transverse support for construction similarly has the above advantages, and steps are simple.
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Description

technical field

[0001] The invention relates to the field of temporary support for tunnels, in particular to a temporary horizontal support for tunnel construction by step method and an installation method thereof. Background technique

[0002] The three-step method is often used in large-section tunnels with weak surrounding rocks. When the steps are excavated step by step, the surrounding rock pressure of the tunnel excavation increases, the bending moment and axial force on the support device gradually increase, and the primary support structure undergoes obvious sliding deformation into the tunnel. The traditional treatment method is to install reinforced concrete For horizontal support, steel arches need to be welded and concrete poured. After the construction is completed, the concrete is broken with a hand-held jackhammer, and the fixed rods and steel arches are cut off with oxygen welding. During this process, the cross support cannot be reused. The problems of thi...

Examples

Embodiment

[0039] Such as figure 1 As shown, the temporary horizontal support in this embodiment, which is suitable for the construction of the tunnel step method, is supported on the transverse chord line of the steel arch 1 of the main tunnel, and the two ends are connected with the steel arch 1 of the main tunnel to provide transverse support for the tunnel primary support structure. The supporting force can avoid the sliding deformation of the primary support structure into the hole. Different from the existing cast-in-place horizontal support, the temporary horizontal support in this embodiment is a prefabricated rod-shaped horizontal support, which is a horizontal support that can be reused, so steps such as pouring are omitted during installation, saving Construction materials such as steel support and shotcrete can be quickly installed and subjected to force in a timely manner; there is no need to go through steps such as oxygen welding and cutting when dismantling, which is not ...