Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method for steel sheet pile cofferdam in rock area with thin covering layer
The invention provides a construction method of a steel sheet pile cofferdam in a rock area with a thin covering layer, which comprises the following steps of: guiding a hole at a designed position on a construction platform through hole guiding equipment, and backfilling red clay in a drilled hole after the hole guiding is completed; a plurality of guide mechanisms are installed on the inner side of the construction platform, then steel sheet piles are inserted and driven through piling equipment, and the steel sheet piles abut against the guide mechanisms to be positioned in the inserting and driving process; high-pressure rotary jet grouting sealing reinforcement is conducted upwards at the bottom of the steel sheet pile; water is pumped in the cofferdam, and inner supports are installed layer by layer from top to bottom; the foundation pit is excavated to the designed elevation, a cushion layer is poured, and a bearing platform is constructed; sand is backfilled between the bearing platform and the steel sheet pile, and the pier body is constructed after the inner support on the lowest layer is removed; the construction method of guide hole backfilling and high-pressure jet grouting is adopted, a consolidation system is formed by the steel sheet piles and rock, and sand is backfilled between the bearing platform and the steel sheet pile cofferdam to complete first system conversion. The device has the characteristics of simple structure, definite stress and safe construction.
本发明提供了一种覆盖层较薄的岩石区钢板桩围堰施工方法，在施工平台通过引孔设备在设计位置进行引孔，引孔完成后在钻孔内回填红黏土；在施工平台内侧安装多个导向机构，然后通过打桩设备插打钢板桩，插打过程中钢板桩抵靠在导向机构上定位；在钢板桩的底部往上进行高压旋喷注浆密封加固；在围堰内抽水，并由上往下逐层安装内支撑；基坑开挖至设计标高浇筑垫层并施工承台；在承台与钢板桩之间回填砂，拆除最下层内支撑后施工墩身；采用引孔回填和高压旋喷注浆的施工方法，使钢板桩与岩石形成固结体系，在承台与钢板桩围堰之间回填砂来完成第一次体系转换。具有结构简单，受力明确，施工安全的特点。
Construction method for steel sheet pile cofferdam in rock area with thin covering layer
The invention provides a construction method of a steel sheet pile cofferdam in a rock area with a thin covering layer, which comprises the following steps of: guiding a hole at a designed position on a construction platform through hole guiding equipment, and backfilling red clay in a drilled hole after the hole guiding is completed; a plurality of guide mechanisms are installed on the inner side of the construction platform, then steel sheet piles are inserted and driven through piling equipment, and the steel sheet piles abut against the guide mechanisms to be positioned in the inserting and driving process; high-pressure rotary jet grouting sealing reinforcement is conducted upwards at the bottom of the steel sheet pile; water is pumped in the cofferdam, and inner supports are installed layer by layer from top to bottom; the foundation pit is excavated to the designed elevation, a cushion layer is poured, and a bearing platform is constructed; sand is backfilled between the bearing platform and the steel sheet pile, and the pier body is constructed after the inner support on the lowest layer is removed; the construction method of guide hole backfilling and high-pressure jet grouting is adopted, a consolidation system is formed by the steel sheet piles and rock, and sand is backfilled between the bearing platform and the steel sheet pile cofferdam to complete first system conversion. The device has the characteristics of simple structure, definite stress and safe construction.
本发明提供了一种覆盖层较薄的岩石区钢板桩围堰施工方法，在施工平台通过引孔设备在设计位置进行引孔，引孔完成后在钻孔内回填红黏土；在施工平台内侧安装多个导向机构，然后通过打桩设备插打钢板桩，插打过程中钢板桩抵靠在导向机构上定位；在钢板桩的底部往上进行高压旋喷注浆密封加固；在围堰内抽水，并由上往下逐层安装内支撑；基坑开挖至设计标高浇筑垫层并施工承台；在承台与钢板桩之间回填砂，拆除最下层内支撑后施工墩身；采用引孔回填和高压旋喷注浆的施工方法，使钢板桩与岩石形成固结体系，在承台与钢板桩围堰之间回填砂来完成第一次体系转换。具有结构简单，受力明确，施工安全的特点。
Construction method for steel sheet pile cofferdam in rock area with thin covering layer
一种覆盖层较薄的岩石区钢板桩围堰施工方法
ZHANG SHIKUI (Autor:in) / FENG XIAOLONG (Autor:in) / CHEN BAITING (Autor:in) / MA ZHIQING (Autor:in) / TANG ZHONGQIANG (Autor:in) / KE SUOAN (Autor:in) / WU NINGJIANG (Autor:in) / TENG ZHAOXIN (Autor:in) / TIAN YUN (Autor:in) / QIU XUEFEI (Autor:in)
22.12.2023
Patent
Elektronische Ressource
Chinesisch
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