A cantilever beam-column system and construction method implemented simultaneously with the depth of the pit in the pit
A shallow pit and overhanging technology, which is applied in excavation, infrastructure engineering, construction, etc., can solve problems such as the inability to ensure the integrity of the internal structure's stress system, achieve shortened construction periods, significant economic and social benefits, and safe and stable stress Effect
Active Publication Date: 2022-07-22
CHANGJIANG SURVEY PLANNING DESIGN & RES
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Problems solved by technology
It is used to solve the technical problem that the interface construction process of two-level or multi-level foundation pits (that is, pits in pits) cannot ensure the integrity of the internal structural stress system
Method used
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[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, so as to facilitate a clear understanding of the present invention, but they do not limit the present invention.
[0034] like Figure 1-2 As shown, the present invention is as figure 1 As shown, the typical cross-section of the structure implemented in the same period of the pit depth includes the cantilever beam-column system, the enclosure structure 1, the temporary column pile 2 and the support 3, the shallow pit 4, Deep pit 5, shallow pit internal structure 6 and deep pit internal structure 7.
[0035] In this embodiment, the enclosure structure 1 and the temporary column pile 2 of the two-stage foundation pit are cast as a whole.
[0036] First, the shallow pit 4 and the deep pit 5 are made: the whole is excavated to the shallow pit base 4-1, and the support 3 is supported along with the excavation. The inner structure 6 of the s...
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The invention discloses a cantilever beam-column system and a construction method which are implemented simultaneously with the depth of the pit in the pit. The cantilevered beam-column system is located on the boundary between the shallow pit and the deep pit, and includes, from bottom to top, the top of the enclosure structure of the deep pit, the stressed main beam and the bottom of the vertical member at the interface between the deep and shallow pit; The stressed main beam of the cantilever beam-column system falls on the enclosure structure of the deep pit and the side walls of the deep pit structure, and the lower part of the cantilever beam-column system is connected to the enclosure structure of the deep pit and the vertical reinforcement of the side wall of the deep pit structure. Connection, the side part of the cantilevered beam-column system and the bottom plate of the internal structure of the shallow pit are integrally cast-in-place, and the side part of the cantilevered beam-column system is also connected with the steel reinforcement of the middle plate of the internal structure of the deep pit; The vertical members fall on the stressed main beams of the cantilever beam-column system. The present invention can realize the closing of the force transmission path of the internal structure of the shallow pit through the cantilever beam-column system, so that it is not affected by the construction process of the deep pit, thereby realizing the full utilization of the construction face in the same period.
Description
technical field [0001] The invention belongs to the technical field of underground engineering, and particularly relates to a cantilever beam-column system and a construction method in which the depth and shallowness of the pit are implemented simultaneously. Background technique [0002] With the gradual development of urban rail transit, the scale and difficulty of subway stations have gradually increased. Multi-line transfer stations are often limited by multiple factors such as surrounding environmental conditions, development timing, and line burial depth. The so-called "pit in the pit". However, the limitations of construction period and construction site have put forward new requirements for the construction of such multi-level foundation pits with large height differences. The early multi-level foundation pits were routinely implemented by the method of "deep first and then shallow", and the design calculations and construction procedures were more in line with the ...
Claims
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IPC IPC(8): E02D17/02E02D17/04
CPCE02D17/02E02D17/04
Inventor 汪子豪周丹欧阳院平苏晓文罗欣宇万珊罗伟陈飞
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES