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A kind of device and method for static load model test

A model test and static load technology, applied to the test of the foundation structure, using a stable tension/pressure test to test the strength of the material, the direction of the building, etc., can solve the difficulties of movement and disassembly, the inability to guarantee the verticality of the pile body, and the failure of the pile And other issues

Active Publication Date: 2021-09-10
TANGSHAN COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The devices involved in the above documents have disadvantages such as bulky size, high manufacturing cost, difficulty in moving and disassembling, and complicated test operation.
In addition, the devices involved in the above-mentioned documents do not impose lateral restraint on the pile body when it is pressed into the model pile body, so the verticality of the pile body cannot be guaranteed, and it is easy to cause bending damage and instability damage to the pile body, which leads to some The model pile body made of PVC, wood, plain concrete, and cement mortar materials cannot be pressed into the soil layer, resulting in the failure of the pile

Method used

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  • A kind of device and method for static load model test
  • A kind of device and method for static load model test
  • A kind of device and method for static load model test

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Embodiment 1

[0082] Embodiment 1, PVC composite foundation static load test.

[0083] S1. The model box 13 is 1.2m long, 1.0m wide, and 1.3m high. The test soil 14 in the box is sandy soil, and the filling height is 1.2m. Therefore, the cross-sectional size of the square steel pipe 12 is determined to be 50mm×100mm, and the wall thickness is 3mm. Length 1.2m. Arrange two square steel pipes 12 along the short side direction of the model box 13 according to the positions of the pile pressure points, so that the pile pressure points are located in the middle of the two square steel pipes 12.

[0084] S2. The model pile 10 is made of PVC pipe, with an outer diameter of 40 mm, a wall thickness of 2 mm, and a length of 600 mm. From this, it is determined that the screw screw 2 has a length of 1.0 m, a diameter of 30 mm, and a pitch of 4 mm. According to the selected screw screw 2, the inner threaded upper pile conduit 5 and lower pile conduit 11, special end, torque elimination unit 7 and other...

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Abstract

The invention discloses a device and method for static load model tests, belonging to the technical field of geotechnical engineering tests. Design a static load model test device that can be assembled, press the model pile vertically into the soil layer, and carry out the static load model test. The device is composed of a rotary pressurization unit with controllable rotation speed fixed on the model box, a lateral stabilization unit of the pile body, a connection unit and a torque elimination unit. This method is not only suitable for pressing in long and thin model piles, but also suitable for static load test detection of model piles, composite foundations and natural foundations.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering tests, in particular to an assemblable static load model test device and method capable of ensuring the stability of a pile body, and is also suitable for static load tests on model piles and composite foundations. Background technique [0002] Static load test is currently the most widely used method among various methods for testing the bearing capacity of single piles or composite foundations. The obvious advantage of this test method is that the stress conditions are close to reality and the test results are intuitive, but the test scale and cost are relatively large, so people usually use model tests with relatively small test scale and cost to study the characteristics of pile foundations and composite foundations. When performing static load model tests on single piles or composite foundations, the model pile body needs to be pressed into the soil layer first, and then the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08E02D33/00
CPCE02D33/00
Inventor 刘明泉李晓芝姚雷康洪震乔京生
Owner TANGSHAN COLLEGE
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