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Tunnel seepage test device

A test device and tunnel technology, which is applied in the direction of measurement device, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problems of tunnel ring dead-leg and longitudinal dead-leg, etc., so as to facilitate the test process and Phenomenon, principle scientific and reliable, simple structure effect

Inactive Publication Date: 2021-03-16
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can study the change law of the tunnel seepage field during the construction period and the operation period, but only simplifies the tunnel drainage system, and does not consider the tunnel circumferential blind pipe and longitudinal dead pipe

Method used

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  • Tunnel seepage test device
  • Tunnel seepage test device
  • Tunnel seepage test device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The main structure of the tunnel seepage test device involved in this embodiment includes a model box 1, a suspension ring 2, an upper water inlet 3, a lower water inlet 4, a wire hole 5, a front cover 6, a front cover gasket 7, and an O-shaped front cover. Sealing ring 8, rear cover 9, rear cover O-ring 10, tunnel model 11, circular dead-leg 12, horizontal dead-leg 13 and longitudinal dead-leg 14; the top of the model box 1 with hollow rectangular structure There are two rings 2 of circular or rectangular structure, the upper part of the model box 1 is provided with an upper water inlet 3, the lower part of the model box 1 is provided with a lower water inlet 4, and the side wall of the model box 1 is provided with several circular structures. Wire hole 5, front cover plate 6 of circular structure is provided on the front of model box 1, model box 1 and front cover plate 6 are connected by bolts, and front cover plate of circular structure is arranged between model box ...

Embodiment 2

[0019]The tunnel seepage test device involved in this embodiment simulates the process of the seepage field under the normal drainage of the tunnel as follows: lay a 5cm thick gravel layer around the side wall of the model box 1 to speed up the seepage velocity of the groundwater, and then fill the surrounding rock in layers. The material is to simulate the surrounding rock, and the filling thickness of each layer is 20cm. After each layer is filled, it is manually tamped. When the filling thickness is 60cm, the prefabricated tunnel model 11 is placed in the middle of the model box 1, and the outer wall of the tunnel model 11 is bonded. There are multi-layer woven geotextiles with permeability coefficients that meet the requirements to simulate the initial support of the tunnel. Micro-water pressure gauges and strain gauges that have undergone waterproof treatment are buried at designated positions around the tunnel model 11, and the wires of the micro-pressure gauges and strain...

Embodiment 3

[0021] The tunnel seepage test device involved in this embodiment simulates the process of the seepage field under the condition of tunnel blockage as follows: lay a 5cm thick gravel layer around the side wall of the model box 1 to speed up the seepage velocity of groundwater, and then fill it in layers similar to the surrounding rock The material is to simulate the surrounding rock, and the filling thickness of each layer is 20cm. After each layer is filled, it is manually tamped. When the filling thickness is 60cm, the prefabricated tunnel model 11 is placed in the middle of the model box 1, and the outer wall of the tunnel model 11 is bonded. There are multi-layer woven geotextiles with a permeability coefficient that meets the requirements to simulate the initial support of the tunnel. The circumferential dead-leg 12 and the longitudinal dead-leg 14 are filled with different contents of long-staple cotton, and the simulated circumferential dead-leg 12 and the longitudinal de...

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Abstract

The invention belongs to the field of geotechnical engineering tests, and relates to a tunnel seepage test device. The main structure comprises a model box, a front cover plate, a rear cover plate anda tunnel model, wherein the front surface of the model box is provided with the front cover plate, the back surface of the model box is provided with the rear cover plate, and the tunnel model with acircular structure is arranged between the front cover plate and the rear cover plate. Based on the test requirements, different water head heights and surrounding rock types are adjusted, the displacement of the blind pipe is controlled, the shape of the tunnel model is changed, the repeated utilization rate of the model box is increased, the front cover plate made of organic glass is convenientto use, and the test process and phenomenon are easy to observe. In the test process, water flow is collected and drained to the longitudinal blind pipes through the annular blind pipes and discharged out of the tunnel model through the transverse blind pipes at the arch feet, and the drainage blind pipes can be filled with different contents of long stapled cotton according to test working conditions so as to simulate different degrees of blockage conditions of the blind pipes; the structure is simple, the principle is scientific and reliable, and the evolution process of the seepage field under different blocking degrees and different drainage conditions can be known.

Description

Technical field: [0001] The invention belongs to the field of geotechnical engineering tests, and in particular relates to a tunnel seepage test device, which can simulate the seepage field of tunnels with different shapes under normal drainage conditions and the seepage field under the condition of drainage system blockage. Background technique: [0002] At present, tunnel construction is in full swing. However, with the increase of operation time, more and more diseases appear in the operating tunnels. According to statistics, about 30% of the tunnels have serious water leakage. Long-term leakage of tunnels will cause The equipment in the tunnel was damaged, the lining was corroded, the road surface was wet and slippery, and the water environment around the tunnel was damaged. It can be seen that the danger of tunnel seepage water, and one of the important reasons is the lack of understanding of the mechanism of the tunnel structure in the seepage field. For the tunnel se...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0806
Inventor 鲍彤张素磊李雪琪柳忠植李鹏飞陈立平周明岑佳能
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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