深基坑边坡喷锚支护(工程实例)（Shotcrete bolt support of deep foundation pit (engineering example)）.docVIP

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深基坑边坡喷锚支护(工程实例)（Shotcrete bolt support of deep foundation pit (engineering example)）.doc

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深基坑边坡喷锚支护(工程实例)（Shotcrete bolt support of deep foundation pit (engineering example)）

深基坑边坡喷锚支护(工程实例)（Shotcrete bolt support of deep foundation pit (engineering example)） The shotcrete bolt mesh support is to improve the structural strength and the anti deformation rigidity of the slope soil, and to reduce the lateral deformation of the soil and to enhance the overall stability of the slope. In the pit wall formed by the excavation, a bolt body with a certain length and density is arranged, and a flexible supporting system is formed by the bolt body and the shotcrete layer structure. The retaining system is firmly combined with the soil in situ in the pit wall to work together to form a type of support mechanism that belongs to the active control mechanism. 1, overview: 1.1 overview The shotcrete bolt mesh support is to improve the structural strength and the anti deformation rigidity of the slope soil, and to reduce the lateral deformation of the soil and to enhance the overall stability of the slope. Such as: Chengdu Shahe sewage treatment plant project, is located in Chengdu jump Hebei Road, and Sichuan pharmaceutical factory, Chengdu thermal power plant adjacent. Because the project is in the urban areas, narrow construction site, the pumping station excavation depth is 13.4 meters deep, must adopt effective support measures to ensure the stability of the foundation pit, foundation pit construction safety, according to geological data, open pit The depth of excavation, the environmental conditions around the site and the requirements of the time limit are determined by adopting the shotcrete bolt support scheme. 1.2 engineering geology The construction area belongs to the first terrace of Minjiang River system. Its topography is flat. According to the geotechnical engineering investigation report of Chengdu Shahe sewage treatment plant provided by Sichuan Geological Survey Institute, the formation of the site is mainly from top to bottom: The miscellaneous fill: structural difference, loose texture, thickness of about 0.80 ~ 3.20m; The clay: plas