Test method and test device for simulating stratum deformation caused by pipe jacking construction

A technology of test device and test method, applied in the field of rock and soil mechanics test

Active Publication Date: 2014-08-20
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that there is currently no test device and test method that can simulate the formation deformation caused by pipe jacking construction.

Method used

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  • Test method and test device for simulating stratum deformation caused by pipe jacking construction
  • Test method and test device for simulating stratum deformation caused by pipe jacking construction
  • Test method and test device for simulating stratum deformation caused by pipe jacking construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A test method for simulating formation deformation caused by pipe jacking construction, the steps are:

[0046] 1) Install the laterally flexible loading bag: open the lateral water injection valve 45 and the first exhaust valve 12 on the laterally flexible loading bag 1, start the laterally loading booster pump 9, and fill the laterally flexible loading bag 1 with water until The lateral flexible loading bag 1 is filled with water, stops the water injection, and closes the lateral water filling valve 45 and the first exhaust valve 12, and then the lateral flexible loading bag 1 is installed at the preset position on the right side wall of the model box 19.

[0047] 2) Filling and buried depth monitoring components: Fill the test soil 42 evenly in layers in the model box 19, and bury the earth pressure cell 20 and the displacement sensor 21 at the preset position, and the earth pressure cell 20 and the displacement sensor 21 are externally connected The data acquisition...

Embodiment 2

[0056] according to figure 1 , figure 2 , image 3 , Figure 4 It can be seen that a test device for simulating formation deformation caused by pipe jacking construction consists of lateral flexible loading bag 1, vertical flexible loading bag 2, rigid loading plate 3, reaction force frame column 4, reaction force frame beam 5, force transmission column 6. Hydraulic jack 7. Lateral loading pressure gauge 8. Lateral loading pressurization pump 9. First lateral pressurization water injection pipe 10. Second lateral pressurization water injection pipe 11. First exhaust valve 12. Vertical Loading pressure gauge 13, vertical loading pressurization pump 14, first vertical pressurized water injection pipe 15, second vertical pressurized water injection pipe 16, second exhaust valve 17, simulated pipe jacking 18, model box 19, soil Pressure box 20, displacement sensor 21, annular water bag 22, water inlet main pipe 23, water inlet main pipe pressure gauge 24, water inlet main pipe...

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Abstract

The invention discloses a test method and a test device for simulating stratum deformation caused by pipe jacking construction. The test method comprises the following steps: (1) installing a lateral flexible loading bag; (2) filling with earth; (3) installing a simulated jacking pipe; (4) installing a loading system; (5) loading; (6) monitoring an initial value; (7) simulating an excavated stratum loss process; and (8) organizing and analyzing test data. The lateral flexible loading bag is adhered to the inner wall of a model box, the left end of the model box is connected with the lateral flexible loading bag, the right end of the model box is connected with a lateral loading pressure gauge, and the lateral loading pressure gauge is connected with a lateral loading booster pump through a lateral pressurizing water injection pipe; an exhaust valve is arranged at the top of the lateral flexible loading bag; a circular hole is formed from the front side wall of the model box to the bottom of the model box; studs are welded at the periphery of a circular jacking pipe preformed hole; the right end of the simulated jacking pipe is placed in the circular jacking pipe preformed hole in the front side wall of the model box, and the left end of the simulated jacking pipe is placed close to the rear wall of the model box. The test device disclosed by the invention is reasonable in structure and convenient to operate and is used for simulating a model test of stratum deformation caused by pipe jacking tunnel construction.

Description

technical field [0001] The present invention relates to the technical field of rock and soil mechanics testing, more specifically to a test method capable of simulating formation deformation caused by pipe jacking construction, and also relates to a test device for simulating formation deformation caused by pipe jacking construction, which is suitable for simulating site conditions Model test of formation deformation induced by pipe construction. Background technique [0002] The pipe jacking construction technology is a non-excavation underground pipeline laying construction technology that uses hydraulic pressure as the power to jack the pipe jacking machine and the pipe joints to be laid underground one by one until the pipe jacking receiving well. As an underground excavation method, pipe jacking construction will inevitably disturb the soil around the pipeline. As a result of the disturbance, complex mechanical behaviors such as unloading or loading will occur in the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 陈善雄程刘勇许锡昌王星运
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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