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High-pressure rotary jet grouting bottom sealing steel sheet pile cofferdam construction method
The invention relates to the technical field of pile cap cofferdam construction, and provides a high-pressure rotary jet grouting bottom sealing steel sheet pile cofferdam construction method which comprises the following steps: S1, constructing an overwater annular construction platform; s2, cofferdam construction is conducted, specifically, steel sheet piles are inserted and driven in the inner circumference of the overwater annular construction platform to form a cofferdam; s3, cast-in-situ bored piles are constructed in the cofferdam; s4, temporary supporting pieces are constructed on the outer side of the cofferdam, and the temporary supporting pieces abut against the periphery of the cofferdam; s5, the bottom of the cofferdam is sealed, specifically, high-pressure rotary jet grouting is conducted on a soil body at the bottom of the cofferdam to form a bottom reinforcing layer; s6, pumping water in the cofferdam and constructing an inner support; S7, excavating a reinforcing layer at the bottom of the cofferdam to the designed elevation of the bottom of the bearing platform; s8, a bearing platform reinforcing mesh is bound, and a bearing platform formwork is erected; s9, bearing platform concrete is poured; the cofferdam has the effect that the cofferdam steel sheet piles are not prone to displacement and deformation due to high-pressure rotary jet grouting.
本申请涉及的承台围堰施工的技术领域，提出了一种高压旋喷注浆封底钢板桩围堰施工方法，包括以下步骤：S1：施作水上环形施工平台；S2：围堰施工：在水上环形施工平台内周插打钢板桩以形成围堰；S3：在围堰内施打钻孔灌注桩；S4：在围堰外侧施打临时支撑件，并使临时支撑件与围堰外周抵紧设置；S5：围堰底部封底：在围堰底部土体进行高压旋喷注浆形成底部加固层；S6：围堰内抽水并施作内支撑S7：开挖围堰底部加固层至承载台底设计标高；S8：绑扎承台钢筋网并支设承台模板；S9：浇筑承台混凝土；本申请具有围堰钢板桩不易因高压旋喷注浆而出现移位变形的效果。
High-pressure rotary jet grouting bottom sealing steel sheet pile cofferdam construction method
The invention relates to the technical field of pile cap cofferdam construction, and provides a high-pressure rotary jet grouting bottom sealing steel sheet pile cofferdam construction method which comprises the following steps: S1, constructing an overwater annular construction platform; s2, cofferdam construction is conducted, specifically, steel sheet piles are inserted and driven in the inner circumference of the overwater annular construction platform to form a cofferdam; s3, cast-in-situ bored piles are constructed in the cofferdam; s4, temporary supporting pieces are constructed on the outer side of the cofferdam, and the temporary supporting pieces abut against the periphery of the cofferdam; s5, the bottom of the cofferdam is sealed, specifically, high-pressure rotary jet grouting is conducted on a soil body at the bottom of the cofferdam to form a bottom reinforcing layer; s6, pumping water in the cofferdam and constructing an inner support; S7, excavating a reinforcing layer at the bottom of the cofferdam to the designed elevation of the bottom of the bearing platform; s8, a bearing platform reinforcing mesh is bound, and a bearing platform formwork is erected; s9, bearing platform concrete is poured; the cofferdam has the effect that the cofferdam steel sheet piles are not prone to displacement and deformation due to high-pressure rotary jet grouting.
本申请涉及的承台围堰施工的技术领域，提出了一种高压旋喷注浆封底钢板桩围堰施工方法，包括以下步骤：S1：施作水上环形施工平台；S2：围堰施工：在水上环形施工平台内周插打钢板桩以形成围堰；S3：在围堰内施打钻孔灌注桩；S4：在围堰外侧施打临时支撑件，并使临时支撑件与围堰外周抵紧设置；S5：围堰底部封底：在围堰底部土体进行高压旋喷注浆形成底部加固层；S6：围堰内抽水并施作内支撑S7：开挖围堰底部加固层至承载台底设计标高；S8：绑扎承台钢筋网并支设承台模板；S9：浇筑承台混凝土；本申请具有围堰钢板桩不易因高压旋喷注浆而出现移位变形的效果。
High-pressure rotary jet grouting bottom sealing steel sheet pile cofferdam construction method
一种高压旋喷注浆封底钢板桩围堰施工方法
RONG MIN (author) / CHENG CHAOLONG (author) / XUE QIANG (author) / JIANG XIN (author) / DENG XIAOFENG (author) / SUN GUANGHUI (author) / XIAO RUI (author) / ZHANG PING (author) / WANG LIJUN (author)
2023-06-23
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
Larsen steel sheet pile and high-pressure jet grouting pile combined cofferdam construction method
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