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Foundation pit supporting construction method suitable for fabricated subway entrance and exit in soft soil area
A foundation pit supporting construction method suitable for an assembly type subway entrance and exit in a soft soil area comprises the construction steps that S1, slope excavation is conducted, SMW construction method piles are adopted for an enclosure structure, and then in-pit dewatering is conducted; s2, the soil body is excavated to the position 0.5 m below the first supporting position, and a cross brace is constructed; s3, excavation is conducted to the pit bottom, foundation pit excavation needs to be conducted in a segmented, zoned and layered mode symmetrically, and overexcavation is avoided; s4, the prefabricated assembly type side walls are sequentially hoisted and fixedly connected with the assembly type bottom plate and the adjacent assembly type side walls in a spliced mode; s5, dismantling the first support after the inverted support is constructed; and S6, a waterproof layer and a protective layer are constructed, the inverted supports are dismantled, the H-shaped steel is recycled, the dewatering well is blocked, and the road surface is recovered. According to the enclosure structure, the dense insertion H-shaped steel construction method piles are adopted, steel supports are adopted for the first inner support and the inverted support, a rapid supporting system is formed in cooperation with the assembly type bottom plate and the side wall structure, the inner supports are reduced, the supporting distance is increased, and the construction period is shortened.
一种适用于软土地区装配式地铁出入口基坑支护施工方法，其施工步骤为：S1、进行放坡开挖，围护结构采用SMW工法桩，然后进行坑内降水；S2、开挖土体到第一道支撑位置下0.5m，施作横撑；S3、开挖到坑底，基坑开挖必须分段、分区、分层、对称进行，不得超挖；S4、依次吊放预制的装配式侧墙，并将其与装配式底板及相邻装配式侧墙拼接固连；S5、施作倒撑后拆除第一道支撑；S6、施作防水层及保护层，拆除倒撑，回收H型钢，封堵降水井并恢复路面。本发明围护结构采用密插H型钢工法桩，首道内支撑及倒撑均采用钢支撑，配合装配式底板和侧墙结构形成一种快速支撑体系，减少了内支撑，加大了支撑间距，缩短了施工工期。
Foundation pit supporting construction method suitable for fabricated subway entrance and exit in soft soil area
A foundation pit supporting construction method suitable for an assembly type subway entrance and exit in a soft soil area comprises the construction steps that S1, slope excavation is conducted, SMW construction method piles are adopted for an enclosure structure, and then in-pit dewatering is conducted; s2, the soil body is excavated to the position 0.5 m below the first supporting position, and a cross brace is constructed; s3, excavation is conducted to the pit bottom, foundation pit excavation needs to be conducted in a segmented, zoned and layered mode symmetrically, and overexcavation is avoided; s4, the prefabricated assembly type side walls are sequentially hoisted and fixedly connected with the assembly type bottom plate and the adjacent assembly type side walls in a spliced mode; s5, dismantling the first support after the inverted support is constructed; and S6, a waterproof layer and a protective layer are constructed, the inverted supports are dismantled, the H-shaped steel is recycled, the dewatering well is blocked, and the road surface is recovered. According to the enclosure structure, the dense insertion H-shaped steel construction method piles are adopted, steel supports are adopted for the first inner support and the inverted support, a rapid supporting system is formed in cooperation with the assembly type bottom plate and the side wall structure, the inner supports are reduced, the supporting distance is increased, and the construction period is shortened.
一种适用于软土地区装配式地铁出入口基坑支护施工方法，其施工步骤为：S1、进行放坡开挖，围护结构采用SMW工法桩，然后进行坑内降水；S2、开挖土体到第一道支撑位置下0.5m，施作横撑；S3、开挖到坑底，基坑开挖必须分段、分区、分层、对称进行，不得超挖；S4、依次吊放预制的装配式侧墙，并将其与装配式底板及相邻装配式侧墙拼接固连；S5、施作倒撑后拆除第一道支撑；S6、施作防水层及保护层，拆除倒撑，回收H型钢，封堵降水井并恢复路面。本发明围护结构采用密插H型钢工法桩，首道内支撑及倒撑均采用钢支撑，配合装配式底板和侧墙结构形成一种快速支撑体系，减少了内支撑，加大了支撑间距，缩短了施工工期。
Foundation pit supporting construction method suitable for fabricated subway entrance and exit in soft soil area
一种适用于软土地区装配式地铁出入口基坑支护施工方法
XIAO YONGGANG (author) / LIU XIAOMIN (author) / SONG LIWEI (author) / SHI YIAN (author) / ZHANG QIANG (author)
2023-10-13
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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