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Passive pile model test system

A model test and passive pile technology, applied in the direction of applying stable tension/pressure to test material strength, measuring devices, instruments, etc., can solve problems such as low precision, uneven loading of lateral loading devices, and inability to simulate load forms, etc. To achieve the effect of improving project safety reserve and good flexibility

Pending Publication Date: 2017-05-31
TIANJIN CHENGJIAN UNIV
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Problems solved by technology

[0004] The shortcomings of the existing passive pile model test system are: ① the loading height cannot be adjusted during lateral loading, and the situation when the pile foundation is subjected to horizontal loads at different elevations cannot be effectively simulated; ② the current loading device can only Loading rectangular loads cannot simulate other shapes of loads; ③The current lateral loading device is unevenly loaded and has low precision, and cannot accurately measure the displacement of the soil and the displacement of the pile foundation after loading

Method used

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Embodiment Construction

[0028] The structure of the passive pile model test system of the present invention will be described below in conjunction with the accompanying drawings.

[0029] Such as figure 1 , 2 , shown, the structure of the passive pile model test system of the present invention is that the system includes a model box, a moving slider 10, a pile pressing device, a vertical loading system, a lateral loading system, a data acquisition system and a model pile 15. Sand soil 5 is housed in the model groove 3 that is provided with in the described model box, utilize vertical hydraulic jack 25 to press model pile 15 in the sand soil 5 in the model groove 3, install vertical loading system at model pile 15 pile tops , use the lateral hydraulic jack 34 to push the moving slider 10, and then use the data acquisition system to record the test parameters of the pile body to simulate the passive pile model test.

[0030] The model box includes a bottom support 1, a screw rod member 27, a fixed sl...

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Abstract

The present invention provides a passive pile model test system comprising a model box, a moving sliding block, a pile pressing device, a vertical loading system, a lateral loading system, a data collecting system and a model pile, wherein a model groove internally provided with sandy soil is formed in the model box; the model pile is pressed into the sandy soil in the model groove by a vertical hydraulic jack; the moving sliding block is pushed by a lateral hydraulic jack; and the data collecting system is used for recording pile body test parameters for simulating a passive pile model test, that is, the passive pile model test system is formed. In the invention, by adopting the passive pile model test system, the basic shape of a pile base under lateral soil movement can be obtained, the measurement precision of soil displacement can reach 1 mm, the measurement precision of pile body displacement can reach 0.01 mm, the basic mechanical property of a pile base can be obtained well by improvement on precision, and the engineering safety capacity can be improved.

Description

technical field [0001] The invention belongs to the field of civil engineering model tests, in particular to a passive pile model test system. Background technique [0002] Pile foundation is one of the most widely used foundation structures in land civil engineering. In actual engineering, pile foundations are often subjected to vertical loads or lateral loads. Due to the excavation and heap load of engineering construction projects, adjacent It is not uncommon for structures and pile foundations to be deformed and damaged to cause instability accidents. Therefore, the horizontal movement of the soil caused by excavation or heaping, and then the horizontal load of the pile foundation cannot be ignored. Based on the above reasons, the experimental research of passive piles is particularly important. [0003] Experimental research on passive piles includes field tests, indoor model and centrifugal model tests. According to previous field tests, the problems faced in actual ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/10
CPCG01N3/10G01N2203/0003G01N2203/0019G01N2203/0048G01N2203/0682
Inventor 李琳曹磊范胜波张建新郭林坪崔惟超丁豪
Owner TIANJIN CHENGJIAN UNIV
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