Cantilever support platform, supporting retaining wall and construction method

A construction method and technology for supporting platforms, which are applied in the fields of excavation, artificial islands, earthwork drilling, etc., can solve the problems of difficult erection of high-altitude platform supports, difficulty in supplying raw materials, and high safety risks, so as to overcome construction difficulties, complete quickly and efficiently, and safely. good effect

CN112554208AActive Publication Date: 2021-03-26CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-03-26

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Abstract

The invention relates to the field of tunnel side and upward slope protection engineering, in particularly to a cantilever support platform, a supporting retaining wall and a construction method. Thespecific construction process comprises the steps of anchor rod construction, steel box manufacturing, steel box pre-burying, formwork fixing, concrete construction, H-shaped steel platform construction and the like. According to the construction method, a steel box is pre-buried before concrete pouring, then a cantilever H-shaped steel platform is built and constructed, through the cantilever H-shaped steel platform, construction safety and convenience are fully guaranteed, construction tasks are rapidly and efficiently completed, moreover, the cantilever H-shaped steel platform has good bearing capacity, simultaneous construction of multiple drilling machines at high positions can be met at the same time, compared with an existing cantilever support platform, dismounting is faster, and the construction period is greatly shortened.
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Description

technical field

[0001] The invention relates to the field of tunnel slope protection engineering, in particular to a cantilevered support platform, a roof retaining wall and a construction method. Background technique

[0002] Rockfall treatment projects at tunnel entrances are relatively common in actual cases, and the usual protective measures mainly exist in the form of "passive protection nets, active protection nets, and buffer walls". The dangerous rockfall treatment project at the entrance of a tunnel is the largest dangerous rockfall treatment project in a certain area, with high and steep cliffs and well-developed rock mass joints, which are prone to disasters such as rockfall and debris flow, which will cause harm to the construction and operation of the line. Its hazard level is the highest level, and the protection area is about 15000m 2 . The treatment method of dangerous rockfall at the entrance of a tunnel is "the upper part uses a two-stage slope, and the l...

Examples

Embodiment 1

[0041] This example is a dangerous rock fall renovation project in a tunnel. The renovation project belongs to the upper cliff + lower slope landform. The cliff is formed by a fault and is about 150m higher than the railway shoulder. The horizontal distance from the tunnel entrance is about 115m, and the steep slope is about 80. ~85°, the natural slope of the slope is 30-50°, and the relative height difference is about 85m.

[0042] 1. Overview of working conditions

[0043] The lower part of the dangerous rockfall at the entrance of a tunnel is mainly the poplar forest tunnel entrance, the main body of a super-large bridge, all the anchors and fastening systems for the construction of the main span of the bridge, concrete mixing stations, steel processing sheds, staff dormitories, construction access roads, etc. These main works, supporting facilities and temporary facilities are all located within the range of falling dangerous rocks and falling rocks, and the surrounding en...