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Drilling test device and method used for shield model test

A technology of model test and test device, which is applied in shaft equipment, earthwork drilling, wellbore lining, etc., can solve the problem that it is difficult to simultaneously consider the influence of surrounding soil layer disturbance shield tail grouting on formation deformation, shield tunnel excavation and grouting There are few problems such as synchronous simulation research, to achieve the effect of stable air pressure, good applicability, and easy collection and discharge

Active Publication Date: 2017-08-18
中交二公局第四工程有限公司
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Problems solved by technology

However, there are few researches on the simultaneous simulation of shield tunnel excavation and grouting in the existing achievements, and it is difficult to consider the disturbance of shield excavation on the surrounding soil layer and the influence of shield tail grouting on the formation deformation at the same time.

Method used

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  • Drilling test device and method used for shield model test
  • Drilling test device and method used for shield model test
  • Drilling test device and method used for shield model test

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Embodiment Construction

[0031] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings, but the present invention is not limited thereto.

[0032] refer to Figure 1 to Figure 4

[0033] A drilling-type test device for shield model testing, including a workbench 15, on which a tunnel round pipe 11 is arranged, and a cutter head 2 driven by a driving mechanism is arranged on the front side of the tunnel round pipe , the rear side of the cutter head is provided with an airtight chamber 3 for storing excavated muck, and the inner area of ​​the airtight chamber must be sealed during the excavation process. The lower part of the airtight chamber is provided with a slag-absorbing mechanism, and the upper part of the airtight chamber is provided with a ventilation mechanism which completes the opening and closing synchronously with the slag-absorbing mech...

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Abstract

The invention relates to a drilling test device and method used for a shield model test. The drilling test device comprises a workbench which is provided with a tunnel circular pipe. The front side of the tunnel circular pipe is provided with a cutterhead driven by a driving mechanism. The rear side of the cutterhead is provided with a closed chamber used for storing excavated muck. The lower portion of the closed chamber is provided with a muck suction mechanism, and the upper portion of the closed chamber is provided with a ventilation mechanism, wherein the muck suction mechanism and the ventilation mechanism are synchronously opened and closed. The tunnel circular pipe is sleeved with a rubber sleeve with the inner side face being adhered to the tunnel circular pipe. The rubber sleeve is provided with a grouting simulation mechanism. The front side of the workbench is further provided with a simulation box used for being filled with soil layer materials. Holes used for drilling of the cutterhead are separately reserved in the two sides of the simulation box. The drilling test device is compact in structure and can be conveniently used for simulating the excavation and grouting processes, and meanwhile, the method is simple and convenient.

Description

technical field [0001] The invention relates to a drilling-type test device and method for shield model tests, belonging to the technical field of shield model tests for underground geotechnical engineering. Background technique [0002] With the rapid development of the national economy, the traffic volume is increasing day by day. Under the requirements of accelerating urban construction and protecting the surrounding environment, many cities are actively and rationally developing underground space to build subways. The shield method has been widely used as the main construction method in subway construction, but the excavation process of the shield excavation disturbs the surrounding soil significantly. At the same time, considering that the diameter of the cutter head is larger than the outer diameter of the segment, the segment is assembled and comes out of the shield. Behind the tail, a circular gap will be formed with the soil, which will often cause large strata sett...

Claims

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Application Information

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IPC IPC(8): E21D9/08E21D11/10
CPCE21D9/0607E21D9/08E21D11/10
Inventor 黄晓林段德峰曹洋金一平王超东冯珂成广程柯达
Owner 中交二公局第四工程有限公司
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