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A platform for research: civil engineering, architecture and urbanism
End reinforcement construction method based on shield tunneling
The invention discloses an end reinforcement construction method based on shield tunneling, and the construction method comprises the following steps: three-axis mixing pile construction: carrying out soil reinforcement on a soil body in the peripheral area of an end and the area in the advancing direction of a shield tunneling machine by adopting the three-axis mixing pile construction, and forming an outer ring waterproof curtain. The outer ring waterproof curtain is additionally arranged, so that the waterproof effect is improved, water and soil loss around a station is prevented, the risks of shield launching and receiving are reduced, and major safety accidents caused by differential settlement and collapse of surrounding buildings, structures, pipelines and the like due to water and soil loss on the outer side of the reinforcing body are prevented; dewatering is carried out on the reinforcing body before shield launching and receiving, and the water stopping effect of the reinforcing area can be further verified by observing the well water level change amplitude; if the water level is greatly reduced, a weak part can be found out, and reinforcing and water stopping are carried out by injecting double-liquid slurry into a guide hole.
本发明公开了一种基于盾构掘进的端头加固施工方法，该施工方法包括以下步骤：三轴搅拌桩施工，对端头外围区域且位于盾构机行进方向的区域的土体采用三轴搅拌桩施工进行土体加固，形成外圈止水帷幕。本发明通过增设外圈止水帷幕，提高止水效果，防止车站周边水土流失，降低盾构始发、接收的风险，防止加固体外侧水土流失给周边建筑物、构筑物、管线等造成不均匀沉降和坍塌，所引起的重大安全事故，在加固体外侧增设了观测井，在盾构始发、接收前对加固体进行降水，通过观测井水位变化幅度能进一步验证加固区域止水效果；如果水位出现较大幅度的降低，能找出薄弱部分，采取引孔注双液浆进行加固和止水。
End reinforcement construction method based on shield tunneling
The invention discloses an end reinforcement construction method based on shield tunneling, and the construction method comprises the following steps: three-axis mixing pile construction: carrying out soil reinforcement on a soil body in the peripheral area of an end and the area in the advancing direction of a shield tunneling machine by adopting the three-axis mixing pile construction, and forming an outer ring waterproof curtain. The outer ring waterproof curtain is additionally arranged, so that the waterproof effect is improved, water and soil loss around a station is prevented, the risks of shield launching and receiving are reduced, and major safety accidents caused by differential settlement and collapse of surrounding buildings, structures, pipelines and the like due to water and soil loss on the outer side of the reinforcing body are prevented; dewatering is carried out on the reinforcing body before shield launching and receiving, and the water stopping effect of the reinforcing area can be further verified by observing the well water level change amplitude; if the water level is greatly reduced, a weak part can be found out, and reinforcing and water stopping are carried out by injecting double-liquid slurry into a guide hole.
本发明公开了一种基于盾构掘进的端头加固施工方法，该施工方法包括以下步骤：三轴搅拌桩施工，对端头外围区域且位于盾构机行进方向的区域的土体采用三轴搅拌桩施工进行土体加固，形成外圈止水帷幕。本发明通过增设外圈止水帷幕，提高止水效果，防止车站周边水土流失，降低盾构始发、接收的风险，防止加固体外侧水土流失给周边建筑物、构筑物、管线等造成不均匀沉降和坍塌，所引起的重大安全事故，在加固体外侧增设了观测井，在盾构始发、接收前对加固体进行降水，通过观测井水位变化幅度能进一步验证加固区域止水效果；如果水位出现较大幅度的降低，能找出薄弱部分，采取引孔注双液浆进行加固和止水。
End reinforcement construction method based on shield tunneling
一种基于盾构掘进的端头加固施工方法
ZHANG SIJUN (author) / HUI HAIPENG (author) / LIU KEQIANG (author) / GUO WENXUE (author) / LUO SHILEI (author) / LI FEICHEN (author) / CAO CHONG (author) / JI YITIAN (author) / MU XUAN (author) / XU ZHUOYA (author)
2022-08-30
Patent
Electronic Resource
Chinese
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