Test method for measuring compression shear performance of tunnel lining backfill material
A technology of filling materials and test methods, which is applied in the direction of applying stable shear force to test the strength of materials, measuring devices, and analyzing materials, and can solve the problems that the compression and shear performance parameters of filling materials in the real state cannot be well simulated.
Active Publication Date: 2020-05-19
CHINA RAILWAY 19TH BUREAU GRP RAIL TRANSIT ENG +1
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Problems solved by technology
[0004] The present invention provides a test device for measuring the compression and shear performance of the filling material behind the tunnel lining wall, which solves the problem that the existing test devices cannot simulate the construction site well The real state of the filling material behind the wall of pea grains and other granular bodies, and the technical problems of obtaining the compression shear performance parameters of the filling material
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[0024] The present invention is described in detail below in conjunction with accompanying drawing:
[0025] A test device for measuring the compression and shear performance of filling materials behind tunnel lining walls, including a gantry frame 1, a rectangular lower box 4, a rectangular upper cylinder 7, filling materials behind tunnel lining walls, an electronically controlled hydraulic cylinder 15 in the vertical direction, and a horizontal Direction electronically controlled hydraulic oil cylinder 16 and electric control box 18 are provided with a lower box cylindrical inner chamber 5 in the rectangular lower box 4, and an upper cylinder cylindrical inner cavity 8 is arranged in the rectangular upper cylinder 7. The top of the outer wall of the lower box 4 is fixedly provided with a lower box cantilever ear 6 with piercing holes, and the top of the outer wall of the rectangular upper cylinder 7 is fixedly provided with an upper box cantilever ear 9 with piercing holes. ...
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Abstract
The invention discloses a test method for measuring the compression shear performance of a filling material behind a tunnel lining wall. The problem that an existing test device cannot well simulate the real state of a pea gravel filling material on a construction site to obtain compression shear performance parameters of the filling material is solved. A rectangular lower box body with a cylindrical inner cavity of the lower box body is combined with a rectangular upper cylinder body with a cylindrical inner cavity of the upper cylinder body; a closed columnar space is constructed; the closedcolumnar space is filled with a tunnel lining wall rear filling material; a filling material cylinder capable of truly simulating a filling material elastic supporting layer behind a tunnel lining wall is formed; the device comprises a portal frame, a reaction frame, a vertical electric control hydraulic oil cylinder and a horizontal electric control hydraulic oil cylinder, an environment capableof dynamically forming shearing on the filling material cylinder is constructed on the periphery of the outer side of the filling material cylinder, and the test modulus of the compression shearing performance of the filling material behind the tunnel lining wall in the real simulation field tunnel shield environment is obtained.
Description
technical field [0001] The invention relates to a shear test device, in particular to a method for testing the shear performance of filling materials behind tunnel lining walls. Background technique [0002] The shield tunneling method has many advantages such as fast construction speed and high safety, and has become an important method for tunnel construction. In engineering practice, the shield tunneling method is suitable for the construction of tunnels with different diameters and various ground conditions. During the construction of deep and long tunnels using the shield tunneling method, the excavation of the tunnel will cause deformation of the surrounding rock, making the surrounding rock The rock stress is redistributed; the shield machine is continuously pushed forward, and the process of segment support is also the process of gradually unloading the surrounding rock of the subsequent excavation and the supporting structure restraining the deformation of the surro...
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IPC IPC(8): G01N3/24G01N3/02G01N1/28
CPCG01N3/24G01N3/02G01N1/286G01N2203/0025
Inventor 黄少东高崇孟宪彪马文帅封坤陈龙徐凯王胤丞张光赵守宪谢晋水魏龙刚赵霞陈浩铭
Owner CHINA RAILWAY 19TH BUREAU GRP RAIL TRANSIT ENG