Segmented annular excavation support system and its support method for tunnels with weak surrounding rock
A technology of annular excavation and weak surrounding rock, applied in tunnels, tunnel linings, earthwork drilling, etc., can solve the problems of engineering construction accidents, slow construction progress, and many procedures, and ensure safe construction, fast construction, and convenient use. Effect
Inactive Publication Date: 2019-02-22
CHONGQING TECH & BUSINESS INST +1
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Problems solved by technology
[0002] During the construction of tunnel projects, weak surrounding rock areas will often be encountered. If the excavation measures are not appropriate, landslides will often be caused, and even construction accidents will be caused.
The existing tunnel construction methods in weak surrounding rocks, whether it is the CRD method, the double-side-wall pilot pit method or the ring-shaped partial excavation method, have many processes and slow construction progress. Therefore, in order to speed up the construction progress, the construction unit Use only when it is not possible to
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[0021] As shown in the figure, the sectioned annular excavation and support system for weak surrounding rock tunnels in this embodiment includes support devices, excavation and installation tools, and grouting devices; the support devices include one or more prefabricated A support body composed of support links, the support body is an inverted U-shaped structure; the support link is longitudinally provided with longitudinal through holes 3 for grouting or installing anchor rods 8 along the tunnel; the excavation and installation equipment It includes a body 9 that can move autonomously, a mechanical arm 10 set on the body 9, and an excavating head 11 and an installation plug 12 driven by the mechanical arm 10; Describe the grouting nozzle for grouting in the longitudinal through hole 3 and the grouting pump for pressurizing the grout to the grouting nozzle; the segmental annular excavation support system and support method for the weak surrounding rock tunnel in this embodimen...
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The present invention discloses a weak surrounding rock tunnel section annular excavation supporting system. The weak surrounding rock tunnel section annular excavation supporting system comprises a supporting device, an excavation installation machine and a grouting device. The supporting device comprises one or more supporting bodies composed of multiple sections of prefabricated supporting links. Each supporting body is of an inverted U-shaped structure. The supporting links are longitudinally provided with longitudinal through holes used for grouting or installing anchor rods along a tunnel. The excavation installation machine comprises a machine body which can independently move, a mechanical arm arranged on the machine body and an excavation head and an installation plug which are driven by the mechanical arm. The grouting device comprises a grouting nozzle and a grouting pump, wherein the grouting nozzle is driven by the mechanical arm and used for conducting grouting in the longitudinal through holes, and the grouting pump is used for conveying grout into the grouting nozzle in a pressurization mode. According to the weak surrounding rock tunnel section annular excavation supporting system, tunnel weak surrounding rock sections can be rapidly and safely supported.
Description
technical field [0001] The invention relates to the field of tunnel engineering devices, in particular to a segmental annular excavation support system and a support method for tunnels with weak surrounding rocks. Background technique [0002] During the construction of tunnel projects, weak surrounding rock areas will often be encountered. If the excavation measures are not appropriate, landslides will often be caused, and even construction accidents will be caused. The existing tunnel construction methods in weak surrounding rocks, whether it is the CRD method, the double-side-wall pilot pit method or the ring-shaped partial excavation method, have many processes and slow construction progress. Therefore, in order to speed up the construction progress, the construction unit Use only when not possible. [0003] Therefore, it is very necessary and urgent to develop a fast and safe construction machine tool and method for the weak surrounding rock section of the tunnel. Co...
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IPC IPC(8): E21D11/08E21D11/10E21D9/00E21D20/00
CPCE21D9/00E21D11/08E21D11/10E21D20/00
Inventor 王清江王悦
Owner CHONGQING TECH & BUSINESS INST