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A platform for research: civil engineering, architecture and urbanism
Construction method of deep foundation pit supporting system
The invention discloses a construction method for a deep foundation pit supporting system. The construction method comprises the following steps that S1, foundation pit fender posts, dewatering wells and drainage ditches are constructed; s2, earthwork in the foundation pit is excavated in a layered mode, and inter-pile concrete is sprayed in time after excavation; s3, crown beam construction; s4, a first steel support is erected, then part of remaining soil is excavated, and inter-pile concrete is sprayed; s5, excavation continues, a next steel support is erected, then the remaining soil body on the lower portion is excavated, and inter-pile concrete is sprayed; s6, the step S5 is repeated till the position 30 cm above the base, then excavation is stopped, and a concrete cushion layer is poured to seal the base after acceptance inspection is qualified; s7, base cushion layer concrete at the corresponding position of the downward turning beam is chiseled away in a segmented mode, then the downward turning beam is excavated downwards, and a downward turning beam cushion layer and bottom plate concrete are poured; and S8, profile steel is buried in the concrete of the cushion layer of the downward turning beam, and when the deformation of the foundation pit continues to be increased, a temporary steel support is additionally arranged close to the base. When the downward turning beam is constructed, deformation of the foundation pit can be effectively restrained, and the time of foundation pit excavation operation is saved.
本发明公开了一种深基坑支撑体系施工方法，包括以下步骤：S1、施工基坑围护桩、降水井、排水沟；S2、进行基坑内土方分层开挖，开挖后及时喷射桩间混凝土；S3、冠梁施工；S4、架设第一道钢支撑，随后开挖部剩余土体，并喷射桩间混凝土；S5、继续开挖并架设下一道钢支撑，随后开挖下部剩余土体，并喷射桩间混凝土；S6、重复步骤S5至基底以上30cm后停止开挖，验收合格后浇筑砼垫层封闭基底；S7、分段凿除下翻梁对应位置处的基底垫层混凝土，再向下开挖下翻梁，浇筑下翻梁垫层和底板混凝土；S8、在下翻梁垫层混凝土中埋设型钢，当基坑变形继续增大时，在靠近基底加设临时钢支撑。本发明在施作下翻梁时能够有效抑制基坑变形，节省基坑开挖作业的时间。
Construction method of deep foundation pit supporting system
The invention discloses a construction method for a deep foundation pit supporting system. The construction method comprises the following steps that S1, foundation pit fender posts, dewatering wells and drainage ditches are constructed; s2, earthwork in the foundation pit is excavated in a layered mode, and inter-pile concrete is sprayed in time after excavation; s3, crown beam construction; s4, a first steel support is erected, then part of remaining soil is excavated, and inter-pile concrete is sprayed; s5, excavation continues, a next steel support is erected, then the remaining soil body on the lower portion is excavated, and inter-pile concrete is sprayed; s6, the step S5 is repeated till the position 30 cm above the base, then excavation is stopped, and a concrete cushion layer is poured to seal the base after acceptance inspection is qualified; s7, base cushion layer concrete at the corresponding position of the downward turning beam is chiseled away in a segmented mode, then the downward turning beam is excavated downwards, and a downward turning beam cushion layer and bottom plate concrete are poured; and S8, profile steel is buried in the concrete of the cushion layer of the downward turning beam, and when the deformation of the foundation pit continues to be increased, a temporary steel support is additionally arranged close to the base. When the downward turning beam is constructed, deformation of the foundation pit can be effectively restrained, and the time of foundation pit excavation operation is saved.
本发明公开了一种深基坑支撑体系施工方法，包括以下步骤：S1、施工基坑围护桩、降水井、排水沟；S2、进行基坑内土方分层开挖，开挖后及时喷射桩间混凝土；S3、冠梁施工；S4、架设第一道钢支撑，随后开挖部剩余土体，并喷射桩间混凝土；S5、继续开挖并架设下一道钢支撑，随后开挖下部剩余土体，并喷射桩间混凝土；S6、重复步骤S5至基底以上30cm后停止开挖，验收合格后浇筑砼垫层封闭基底；S7、分段凿除下翻梁对应位置处的基底垫层混凝土，再向下开挖下翻梁，浇筑下翻梁垫层和底板混凝土；S8、在下翻梁垫层混凝土中埋设型钢，当基坑变形继续增大时，在靠近基底加设临时钢支撑。本发明在施作下翻梁时能够有效抑制基坑变形，节省基坑开挖作业的时间。
Construction method of deep foundation pit supporting system
一种深基坑支撑体系施工方法
HAO JIE (author) / WAN WEI (author) / ZHANG TIE (author) / YUAN QIPENG (author) / WANG SHUAI (author) / ZHOU XIANG (author) / GU ZIHAO (author) / LI SHANGJUN (author)
2023-01-03
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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