Steel support shaft stress adaptive system real-time compensating hydraulic oil cylinder for base pit
A self-adaptive system, real-time compensation technology, applied in the direction of fluid pressure actuation device, etc., can solve the problem of difficult to apply supporting axial force, wall displacement, affecting subway safety, etc., to improve the integrity and safety reliability, The effect of improving accuracy and reliability and ensuring reliability of use
Active Publication Date: 2012-10-17
SHANGHAI CONSTRUCTION GROUP
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Problems solved by technology
[0006] At present, reinforced concrete supports and Φ609×δ16 steel pipe supports are commonly used in the excavation and support of urban deep foundation pits in Shanghai and other soft soil areas, especially steel pipe supports. At this time, as time goes by, the prestress added to the steel support will decrease, sometimes it will decrease a lot, even the decrease amount can reach more than 50%, and it is difficult to apply the support axial force at this time, so the wall displacement will be caused. When the displacement is too large, it will directly affect the safety of the subway in operation next to the foundation pit
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[0029] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.
[0030] figure 1 Shown is a structural schematic diagram of the real-time compensation hydraulic cylinder device of the foundation pit steel support axial force self-adaptive system proposed by the present invention. Such as figure 1 As shown, the first guide sleeve 5 is arranged in the cylinder body 7; the first piston rod 9 is arranged in the cylinder body 7 through the first guide sleeve 5, and the first piston rod 9 has an axial cavity with an open end, wherein The second guide sleeve 11 is arranged in the axial cavity; the second piston rod 10 is arranged in the axial cavity in the first piston rod 9, and the piston 8 is arranged in the free end of the second piston rod 10; The piston rod 9, the second piston rod 10, the second guide sleeve 11 and the cylinder body 7 form the first oil inlet ...
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The invention relates to a steel support shaft stress adaptive real-time compensating and monitoring system in deep base pit construction, which can effectively control deformation in construction of the deep base pit and ensure the security of running subway tunnels, wherein the steel support shaft stress compensating actuating mechanism is provided with an economic, safe and reliable self-locking booster oil cylinder. The invention is used for compensating steel support shaft stress in constructing deep base pit of near subway operating buildingworks, is provided with the novel oil cylinderactuating mechanism which has small volume, light weight, good economy and safety, high reliability and convenient use, solves the safe and reliable support of the steel support shaft stress compensation and serves the engineering construction.
Description
technical field [0001] The invention relates to a hydraulic oil cylinder device, and in particular to a real-time compensation hydraulic oil cylinder device of an adaptive system for foundation pit steel support axial force. Background technique [0002] With the rapid development of urban rail transit and the extreme shortage of land resources, the number of deep foundation pit projects adjacent to the subway is increasing. [0003] Taking Shanghai as an example, the 3-story basement (partially 4 floors) of the Greater Shanghai Wheelock Plaza project has an excavation area of 9800m 2 , the excavation depth is nearly 21m (the local deepest reaches 26m). The north side of the foundation pit is parallel to the operating tunnel of Metro Line 2, with a net distance of only 5.4m and a parallel length of 90m between the tunnel and the foundation pit. The second phase of Shanghai Pacific Plaza project is only 3.8m away from the outer edge of the subway line 1 tunnel. The found...
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IPC IPC(8): F15B15/16
Inventor 顾国明陆云徐贤波
Owner SHANGHAI CONSTRUCTION GROUP