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A platform for research: civil engineering, architecture and urbanism
Soft soil stratum ultra-wide and ultra-deep foundation pit construction method
The invention discloses a soft soil stratum ultra-wide and ultra-deep foundation pit construction method which comprises the steps that S1, guide grooves are excavated along the two sides of a preset position of an underground diaphragm wall, and a guide wall is poured; s2, the underground diaphragm wall is divided into a T-shaped section and other sections, the underground diaphragm wall is built by adopting a method of excavating segmented buildings at intervals, and a plurality of supporting connecting pieces are pre-buried in the T-shaped section at a preset depth; s3, the foundation pit is divided into a center island and a plurality of side pits surrounding the center island, layered excavation is conducted, and after excavation is conducted to the preset depth of the layer, the transverse supports of the layer are installed on the supporting connecting pieces of the T-shaped sections; s4, the step S3 is repeated until the foundation pit is excavated to the preset depth, the bottom of the foundation pit is reinforced, then the bottom of the foundation pit is excavated to form an arch with an upward opening, a matched arch reinforcement cage is placed, and concrete is poured; s5, a lining wall is built along the inner wall of the foundation pit; and S6, redundant transverse supports are dismantled, and foundation pit construction is completed. The method has the beneficial effect of reducing the deformation of the enclosure structure and the upheaval of the pit bottom.
本发明公开了一种软土地层超宽超深基坑施工方法，包括：S1、沿地下连续墙的预设位置两侧开挖导槽、浇筑导墙；S2、将地下连续墙分为T形段和其余段，采用间隔开挖分段建筑的方法建筑地下连续墙，T形段上在预设深度预埋有多个支撑连接件；S3、将基坑划分为中心岛和围绕中心岛的多个边坑，分层开挖，当开挖至本层预设深度后，安装本层横支撑至T形段的支撑连接件上；S4、重复S3，直至开挖至基坑预设深度，对基坑底部进行加固，然后将基坑底部开挖形成开口朝上的拱形，放置适配的拱形钢筋笼，浇注混凝土；S5、沿基坑内壁建设内衬墙；S6、拆除多余的横支撑，即完成基坑施工。本发明具有减少围护结构变形和坑底隆起的有益效果。
Soft soil stratum ultra-wide and ultra-deep foundation pit construction method
The invention discloses a soft soil stratum ultra-wide and ultra-deep foundation pit construction method which comprises the steps that S1, guide grooves are excavated along the two sides of a preset position of an underground diaphragm wall, and a guide wall is poured; s2, the underground diaphragm wall is divided into a T-shaped section and other sections, the underground diaphragm wall is built by adopting a method of excavating segmented buildings at intervals, and a plurality of supporting connecting pieces are pre-buried in the T-shaped section at a preset depth; s3, the foundation pit is divided into a center island and a plurality of side pits surrounding the center island, layered excavation is conducted, and after excavation is conducted to the preset depth of the layer, the transverse supports of the layer are installed on the supporting connecting pieces of the T-shaped sections; s4, the step S3 is repeated until the foundation pit is excavated to the preset depth, the bottom of the foundation pit is reinforced, then the bottom of the foundation pit is excavated to form an arch with an upward opening, a matched arch reinforcement cage is placed, and concrete is poured; s5, a lining wall is built along the inner wall of the foundation pit; and S6, redundant transverse supports are dismantled, and foundation pit construction is completed. The method has the beneficial effect of reducing the deformation of the enclosure structure and the upheaval of the pit bottom.
本发明公开了一种软土地层超宽超深基坑施工方法，包括：S1、沿地下连续墙的预设位置两侧开挖导槽、浇筑导墙；S2、将地下连续墙分为T形段和其余段，采用间隔开挖分段建筑的方法建筑地下连续墙，T形段上在预设深度预埋有多个支撑连接件；S3、将基坑划分为中心岛和围绕中心岛的多个边坑，分层开挖，当开挖至本层预设深度后，安装本层横支撑至T形段的支撑连接件上；S4、重复S3，直至开挖至基坑预设深度，对基坑底部进行加固，然后将基坑底部开挖形成开口朝上的拱形，放置适配的拱形钢筋笼，浇注混凝土；S5、沿基坑内壁建设内衬墙；S6、拆除多余的横支撑，即完成基坑施工。本发明具有减少围护结构变形和坑底隆起的有益效果。
Soft soil stratum ultra-wide and ultra-deep foundation pit construction method
软土地层超宽超深基坑施工方法
WANG CHUNHAI (author) / QIU ZHOU (author) / TIAN WEI (author) / YIN MIN (author) / XU XIAOKANG (author)
2023-11-03
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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