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Construction method for deep foundation pit excavation
The invention discloses a construction method for excavation of a deep foundation pit, which comprises the following steps of: 1, measuring the area of a construction site, and dividing a foundation pit excavation area according to a drawing; 2, the site is leveled, temporary fences are constructed, steel sheet piles are driven, earthwork is excavated to the bottom of a steel support, and a double-spliced enclosing purlin and a first steel support are constructed; 3, earthwork is excavated to the position of the second steel support according to the working procedures, and the double-spliced enclosing purlins and the second steel support continue to be constructed; 4, the long-arm excavator continues to conduct downward excavation till the designed foundation pit elevation is achieved, the double-spliced surrounding purlins are constructed, and drainage facilities in the pit are made; 5, constructing a pipe gallery main body structure and an external waterproof structure; 6, the double-spliced enclosing purlins on the bottom layer are dismantled, backfilling is conducted till the height of the second steel support reaches 500 mm, and the second steel support and the double-spliced enclosing purlins are dismantled; and 7, backfilling is conducted to the position 500 mm below the first steel support, the second steel support and the double-spliced enclosing purlin are dismantled, and then road construction work on the upper portion of the pipe gallery structure is conducted.
本发明公开了一种深基坑开挖的施工方法，施工方法包括：步骤1：测量施工地面积，并根据图纸划分出基坑开挖区域；步骤2：平整场地，施工临时围挡，施打钢板桩，开挖土方至钢支撑底，施工双拼围檩及第一道钢支撑；步骤3：按工序开挖土方至第二道钢支撑处，继续施工双拼围檩及第二道钢支撑；步骤4：采用长臂挖机继续向下开挖至设计基坑标高，施工双拼围檩围檩并做好坑内排水设施；步骤5：管廊主体结构及外防水施工；步骤6：拆除底层双拼围檩围檩，回填至第二道钢支撑500mm，拆除第二道钢支撑以及双拼围檩；步骤7：回填至第一道钢支撑下方500mm，并拆除第二道钢支撑和双拼围檩，随后进行管廊结构上部的道路施工工作。
Construction method for deep foundation pit excavation
The invention discloses a construction method for excavation of a deep foundation pit, which comprises the following steps of: 1, measuring the area of a construction site, and dividing a foundation pit excavation area according to a drawing; 2, the site is leveled, temporary fences are constructed, steel sheet piles are driven, earthwork is excavated to the bottom of a steel support, and a double-spliced enclosing purlin and a first steel support are constructed; 3, earthwork is excavated to the position of the second steel support according to the working procedures, and the double-spliced enclosing purlins and the second steel support continue to be constructed; 4, the long-arm excavator continues to conduct downward excavation till the designed foundation pit elevation is achieved, the double-spliced surrounding purlins are constructed, and drainage facilities in the pit are made; 5, constructing a pipe gallery main body structure and an external waterproof structure; 6, the double-spliced enclosing purlins on the bottom layer are dismantled, backfilling is conducted till the height of the second steel support reaches 500 mm, and the second steel support and the double-spliced enclosing purlins are dismantled; and 7, backfilling is conducted to the position 500 mm below the first steel support, the second steel support and the double-spliced enclosing purlin are dismantled, and then road construction work on the upper portion of the pipe gallery structure is conducted.
本发明公开了一种深基坑开挖的施工方法，施工方法包括：步骤1：测量施工地面积，并根据图纸划分出基坑开挖区域；步骤2：平整场地，施工临时围挡，施打钢板桩，开挖土方至钢支撑底，施工双拼围檩及第一道钢支撑；步骤3：按工序开挖土方至第二道钢支撑处，继续施工双拼围檩及第二道钢支撑；步骤4：采用长臂挖机继续向下开挖至设计基坑标高，施工双拼围檩围檩并做好坑内排水设施；步骤5：管廊主体结构及外防水施工；步骤6：拆除底层双拼围檩围檩，回填至第二道钢支撑500mm，拆除第二道钢支撑以及双拼围檩；步骤7：回填至第一道钢支撑下方500mm，并拆除第二道钢支撑和双拼围檩，随后进行管廊结构上部的道路施工工作。
Construction method for deep foundation pit excavation
一种深基坑开挖的施工方法
CAO LIANG (author) / CHEN SHUAI (author) / LI YUNHE (author) / XIE WENHAO (author) / LIU WEI (author) / DU WEILEI (author) / SUN WANCHENG (author) / LI JINGKAI (author) / MENG YINGJIE (author) / ZHANG TINGZHEN (author)
2024-06-18
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
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