System for automatically adding supports in micro foundation pits in eccentric field
A technology of support system and centrifugal field, which is used in foundation structure engineering, foundation structure testing, excavation, etc. It can solve problems such as differences in lateral pressure coefficients, inability to simulate the process of adding support to foundation pits, and achieve the effect of occupying less space.
Inactive Publication Date: 2010-07-28
TONGJI UNIV +1
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Problems solved by technology
The advantage of this method is that it simplifies the complex process of foundation pit construction, can reflect the excavation and unloading process of foundation pit, and the test is relatively simple and easy to control. There are differences from the actual soil conditions
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Embodiment 1
[0028] Embodiment 1: The miniature foundation pit automatic excavation system in this centrifugal field is composed of a foundation pit model system, a foundation pit excavation system, and a foundation pit support system.
[0029]The foundation pit model system consists of a model box 1, a retaining wall 2 and a partition 3. The model box 1 is a hollow cuboid structure with a net size of 800×160×500mm (length×width×height), the front side is a 30mm thick plexiglass surface 4, the length is 800mm, and the width is 500mm. The remaining 5 surfaces of the model box are made of hard alloy aluminum, the wall thickness is 30mm, and can be disassembled, and all joints are sealed with sealing strips. Retaining wall 2 is located at 200mm in the width direction of the model box. It is simulated by an aluminum alloy sheet, with a length of 160mm, a height of 360mm, and a thickness of 6mm. A retaining wall groove 5 with a diameter of 15mm is reserved on the retaining wall for installing s...
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The invention belongs to the field of foundation pit engineering in geotechnical and underground engineering, and in particular relates to a system for automatically adding supports in micro foundation pits in an eccentric field. The system consists of a foundation pit model system, a foundation pit excavation system and a foundation pit support system; a model box is in a strip shape, and organic glass on one side can be detached; a retaining wall is simulated by adopting an aluminum alloy plate, and is reserved with grooves and protrusions; a clapboard consists of a fixation part and a separation part; the separation part consists of four rows of baffle plates, and two baffle plates are arranged in each row; the foundation pit excavation system consists of a scraper, a customized traction device and an excavation oilway; the scraper is in an inverted T-shape and the lower part of the scraper is provided with a blade; the customized traction device is mainly a vertical jack and a horizontal jack and is powered by the excavation oilway; the foundation pit support system consists of a cylinder, a support and a support oilway; each horizontal support piece is controlled by a horizontal cylinder; a piston rod of the cylinder is utilized to simulate support; and the cylinder implements support jacking and retracting processes through an electromagnetic valve and the oilway. The system can simulate the process of automatically excavating the foundation pits and adding the supports in the high-speed eccentric field, better reproduces actual oil stress level and foundation pit engineering construction flow in a laboratory, and can acquire engineering laws according with the actuality.
Description
technical field [0001] The invention belongs to the field of foundation pit engineering in geotechnical and underground engineering, and in particular relates to an automatic support system for miniature foundation pits in a centrifugal field. Background technique [0002] The construction technology of foundation pit engineering in soft ground is complex and risky. Especially in recent years, with the construction of subways and the development of high-rise buildings, the excavation depth of foundation pits has become deeper and deeper, and the distance between adjacent buildings has become smaller and smaller. demanding. One of the key factors to control the impact of foundation pit on the surrounding is the deformation control effect of foundation pit support on the retaining wall and the soil behind the wall. In actual engineering, the mechanism of foundation pit support and the optimization of support design have received more and more attention. Centrifugal model te...
Claims
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IPC IPC(8): E02D33/00E02D17/00E02D17/02E02D17/04
Inventor 马险峰马忠政王志秀刘朝明张海华王磊
Owner TONGJI UNIV