A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Excavation supporting method for foundation pit close to existing building
The invention relates to an excavation supporting method for a foundation pit close to an existing building, and belongs to the technical field of foundation pit excavation supporting. The excavation supporting method comprises the steps that S1, slope protection pile construction is conducted; S2, earth excavation and anchor cable construction are conducted in parallel; S3, in anchor cable construction, drilling machine hole forming and anchor cable assembly assembling are conducted at the same time, drilling is conducted to an original pile foundation below the existing building, in the direction away from the foundation pit, the distance between the tail end of a drilled hole and the foundation pit is larger than the distance between the original pile foundation and the foundation pit, and an anchor cable assembly is put into the drilled hole; S4, grouting is conducted, pressure grouting is adopted as the grouting manner, a first expansion head is formed at the tail end of the drilled hole, and the projection of the first expansion head in the length direction of the anchor cable assembly and the projection of the original pile foundation coincide partially; and S5, the anchor cable assembly is tensioned and locked. The excavation supporting method has the effect that on the premise that foundation pit supporting is stable, the stability of a soil body below the existing building is enhanced.
本申请涉及一种临近已有建筑基坑开挖支护方法，属于基坑开挖支护的技术领域，其包括S1、护坡桩施工；S2、土方开挖和锚索施工平行作业；S3、锚索施工中：钻机成孔与锚索组件组装同时进行，钻孔至已有建筑下方原有桩基处，沿远离基坑方向，钻孔末端与基坑之间的距离大于原有桩基与基坑之间的距离，将锚索组件下放至钻孔内；S4、进行注浆，注浆方式采用压力注浆，在钻孔末端形成第一扩大头，沿锚索组件长度方向第一扩大头的投影与原有桩基的投影存在重合部分；S5、对锚索组件进行张拉锁定，本申请具有基坑支护稳定的前提下，增强对已有建筑下方土体稳定性的效果。
Excavation supporting method for foundation pit close to existing building
The invention relates to an excavation supporting method for a foundation pit close to an existing building, and belongs to the technical field of foundation pit excavation supporting. The excavation supporting method comprises the steps that S1, slope protection pile construction is conducted; S2, earth excavation and anchor cable construction are conducted in parallel; S3, in anchor cable construction, drilling machine hole forming and anchor cable assembly assembling are conducted at the same time, drilling is conducted to an original pile foundation below the existing building, in the direction away from the foundation pit, the distance between the tail end of a drilled hole and the foundation pit is larger than the distance between the original pile foundation and the foundation pit, and an anchor cable assembly is put into the drilled hole; S4, grouting is conducted, pressure grouting is adopted as the grouting manner, a first expansion head is formed at the tail end of the drilled hole, and the projection of the first expansion head in the length direction of the anchor cable assembly and the projection of the original pile foundation coincide partially; and S5, the anchor cable assembly is tensioned and locked. The excavation supporting method has the effect that on the premise that foundation pit supporting is stable, the stability of a soil body below the existing building is enhanced.
本申请涉及一种临近已有建筑基坑开挖支护方法，属于基坑开挖支护的技术领域，其包括S1、护坡桩施工；S2、土方开挖和锚索施工平行作业；S3、锚索施工中：钻机成孔与锚索组件组装同时进行，钻孔至已有建筑下方原有桩基处，沿远离基坑方向，钻孔末端与基坑之间的距离大于原有桩基与基坑之间的距离，将锚索组件下放至钻孔内；S4、进行注浆，注浆方式采用压力注浆，在钻孔末端形成第一扩大头，沿锚索组件长度方向第一扩大头的投影与原有桩基的投影存在重合部分；S5、对锚索组件进行张拉锁定，本申请具有基坑支护稳定的前提下，增强对已有建筑下方土体稳定性的效果。
Excavation supporting method for foundation pit close to existing building
一种临近已有建筑基坑开挖支护方法
SHEN YUANHONG (author) / MENG LEI (author) / WANG KEXIN (author) / HAN TONGHUI (author)
2021-08-13
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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