Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Foundation pit graded depressurization method
The invention provides a foundation pit graded depressurization method. After depressurization is performed through a first-stage pit exterior depressurization well between a ground wall and an adjacent waterproof curtain of the ground wall, a first-stage confined water head and a second-stage confined water head, which is in a to-be-excavated area, are obtained in an area surrounded by the groundwall and the adjacent waterproof curtain; and therefore, the height difference between the second-stage confined water head in the to-be-excavated area and the first-stage confined water head is reduced, so that the pressure of the ground wall is reduced. According to the foundation pit graded depressurization method, the difference between confined water heads inside and outside the pit can be reduced, and an enclosure structure of an ultra-deep foundation pit is protected; the leakage risk of the ultra-deep foundation pit is reduced; And the safety coefficient of construction operation in the foundation pit is increased. According to the foundation pit graded depressurization method, the depressurization range can be effectively controlled, controllable settlement in each depressurization area is guaranteed, the difference between the water heads inside and outside the foundation pit ground wall is reduced, and the construction safety of the deep foundation pit is effectively guaranteed.
本发明提供了一种基坑分级降压方法，通过地墙与所述地墙相邻的止水帷幕之间的一道一级坑外降压井降压后，在地墙与相邻的一道止水帷幕围成的区域内得到一级承压水水头和待开挖区域内的二级承压水水头，以减少待开挖区域内的二级承压水水头与一级承压水水头之间的高度差，进而减小地墙的压力。本发明可以减小坑内外承压水头差，保护超深基坑的围护结构；减少超深基坑的渗漏风险；增加基坑内施工作业的安全系数。本发明可以有效控制降压范围，保证各降压区域内沉降可控，减小基坑地墙内外的水头差，深基坑施工安全得到有效保障。
Foundation pit graded depressurization method
The invention provides a foundation pit graded depressurization method. After depressurization is performed through a first-stage pit exterior depressurization well between a ground wall and an adjacent waterproof curtain of the ground wall, a first-stage confined water head and a second-stage confined water head, which is in a to-be-excavated area, are obtained in an area surrounded by the groundwall and the adjacent waterproof curtain; and therefore, the height difference between the second-stage confined water head in the to-be-excavated area and the first-stage confined water head is reduced, so that the pressure of the ground wall is reduced. According to the foundation pit graded depressurization method, the difference between confined water heads inside and outside the pit can be reduced, and an enclosure structure of an ultra-deep foundation pit is protected; the leakage risk of the ultra-deep foundation pit is reduced; And the safety coefficient of construction operation in the foundation pit is increased. According to the foundation pit graded depressurization method, the depressurization range can be effectively controlled, controllable settlement in each depressurization area is guaranteed, the difference between the water heads inside and outside the foundation pit ground wall is reduced, and the construction safety of the deep foundation pit is effectively guaranteed.
本发明提供了一种基坑分级降压方法，通过地墙与所述地墙相邻的止水帷幕之间的一道一级坑外降压井降压后，在地墙与相邻的一道止水帷幕围成的区域内得到一级承压水水头和待开挖区域内的二级承压水水头，以减少待开挖区域内的二级承压水水头与一级承压水水头之间的高度差，进而减小地墙的压力。本发明可以减小坑内外承压水头差，保护超深基坑的围护结构；减少超深基坑的渗漏风险；增加基坑内施工作业的安全系数。本发明可以有效控制降压范围，保证各降压区域内沉降可控，减小基坑地墙内外的水头差，深基坑施工安全得到有效保障。
Foundation pit graded depressurization method
基坑分级降压方法
CHEN RONG (Autor:in) / PAN GUOQING (Autor:in)
11.12.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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