Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Steel sheet pile cofferdam for deep and thick silt geology close structure and construction method
The invention discloses a construction method of a steel sheet pile cofferdam for a deep and thick silt geology close structure, which comprises the following steps: after construction of a bridge pile foundation is completed, targeted reinforcement is performed on silt with a certain depth below a base in an excavation range of a pile cap cofferdam by adopting a cement mixing pile, shorter full-length steel sheet piles are inserted and driven while reinforcing, and after a certain depth is excavated to install and support a bottom bracket, an enclosing purlin and an inner support are installed on the bracket. And after the foundation pit is continuously excavated in place, a concrete cushion layer is poured, a bearing platform and a pier body are sequentially constructed, then gaps between the bearing platform and the steel sheet piles in the cofferdam are backfilled, medium-coarse sand with good performance is adopted on the side close to the structure, and common soil is adopted on the other sides for backfilling. According to the method, the cement mixing pile is fully used to reinforce the base silt, the length of the steel sheet pile is effectively reduced by more than 30%, the whole steel sheet pile is transported after being shortened and is inserted and driven in place at a time, on-site lengthening welding is not needed, the construction cost is effectively reduced, the construction period is shortened, and the quality safety risk is reduced.
本发明公开了一种深厚淤泥地质临近构造物的钢板桩围堰施工方法，包括以下步骤:桥梁桩基施工完成后，对承台围堰开挖范围的基底以下一定深度淤泥采用水泥搅拌桩进行针对性加固，加固的同时插打较短的通长钢板桩，开挖一定深度安装支撑底牛腿后并在牛腿上安装围檩及内支撑。基坑继续开挖到位后浇筑混凝土垫层，并依次施工承台、墩身，然后对围堰内承台与钢板桩间的空隙进行回填，其中临近构造物侧采用性能好的中粗砂，其余侧采用普通土回填，本发明充分利用水泥搅拌桩对基底淤泥进行加固，有效将钢板桩长度减少30％以上，钢板桩减短后整节运输并一次插打到位，无需现场接长焊接，有效降低了施工成本，缩短了工期，降低质量安全风险。
Steel sheet pile cofferdam for deep and thick silt geology close structure and construction method
The invention discloses a construction method of a steel sheet pile cofferdam for a deep and thick silt geology close structure, which comprises the following steps: after construction of a bridge pile foundation is completed, targeted reinforcement is performed on silt with a certain depth below a base in an excavation range of a pile cap cofferdam by adopting a cement mixing pile, shorter full-length steel sheet piles are inserted and driven while reinforcing, and after a certain depth is excavated to install and support a bottom bracket, an enclosing purlin and an inner support are installed on the bracket. And after the foundation pit is continuously excavated in place, a concrete cushion layer is poured, a bearing platform and a pier body are sequentially constructed, then gaps between the bearing platform and the steel sheet piles in the cofferdam are backfilled, medium-coarse sand with good performance is adopted on the side close to the structure, and common soil is adopted on the other sides for backfilling. According to the method, the cement mixing pile is fully used to reinforce the base silt, the length of the steel sheet pile is effectively reduced by more than 30%, the whole steel sheet pile is transported after being shortened and is inserted and driven in place at a time, on-site lengthening welding is not needed, the construction cost is effectively reduced, the construction period is shortened, and the quality safety risk is reduced.
本发明公开了一种深厚淤泥地质临近构造物的钢板桩围堰施工方法，包括以下步骤:桥梁桩基施工完成后，对承台围堰开挖范围的基底以下一定深度淤泥采用水泥搅拌桩进行针对性加固，加固的同时插打较短的通长钢板桩，开挖一定深度安装支撑底牛腿后并在牛腿上安装围檩及内支撑。基坑继续开挖到位后浇筑混凝土垫层，并依次施工承台、墩身，然后对围堰内承台与钢板桩间的空隙进行回填，其中临近构造物侧采用性能好的中粗砂，其余侧采用普通土回填，本发明充分利用水泥搅拌桩对基底淤泥进行加固，有效将钢板桩长度减少30％以上，钢板桩减短后整节运输并一次插打到位，无需现场接长焊接，有效降低了施工成本，缩短了工期，降低质量安全风险。
Steel sheet pile cofferdam for deep and thick silt geology close structure and construction method
一种深厚淤泥地质临近构造物的钢板桩围堰结构及施工方法
WANG QINGYUN (Autor:in) / SHANG QINGGUO (Autor:in) / YU FUKUN (Autor:in) / XU QIUHONG (Autor:in) / CHEN RENGUANG (Autor:in) / SUN XIANGYOU (Autor:in) / HOU XUEQING (Autor:in) / YANG FENG (Autor:in)
01.02.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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