Visual test system for simulating rectangular pipe jacking construction
A technology of rectangular pipe jacking and test system, which is applied in the field of tunnel and underground engineering, and can solve the problems of single types of excavation test simulation, inability to directly observe, and few special-shaped shields, etc.
Pending Publication Date: 2021-08-27
无锡地铁集团有限公司 +2
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Problems solved by technology
The earth pressure in the earth pressure balance chamber of pipe jacking construction has a great influence on the soil disturbance, but because the construction is inside the soil, it cannot be directly observed
Moreover, there are few special-shaped shield tests at this stage, and the types of excavation test simulations are relatively single.
Method used
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Embodiment 1
[0052] Below in conjunction with accompanying drawing, technical scheme of the present invention is further described
[0053] Such as figure 1 , as shown in 2, a visual test model of the present invention that can directly observe the disturbance of the surrounding soil and piles by rectangular pipe jacking construction under complex working conditions, including a soil box, a PIV digital imaging processing system, and a rectangular pipe jacking driving test machine , Jacking power system.
[0054] Fix the two baffles at the same position in the soil box, and the transparent tube passes through the baffle to span the soil box, and uses rubber stirrups at the joints of the pipes to prevent wind and water;
[0055] Fill the soil box 26 with saturated transparent soil, and lay fluorescent particles 24 at corresponding positions. After the transparent soil is loaded, the pile body 9 is inserted. Loading instrument 23 is placed on the pile body upper end.
[0056] The laser tr...
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The invention relates to a visual test device for simulating special-shaped pipe jacking construction. The device comprises a transparent test soil box, a special-shaped shield digging and cutting support device, a jacking power device and a PIV digital image processing system. The soil box is a transparent special soil box, can be matched with a baffle plate to realize pipelines with different depths, is internally filled with transparent soil, is provided with fluorescent particles at appointed positions, and is provided with light transparent plastic piles at corresponding positions; according to the shield cutter head, a large cutter head drives four small cutter heads to cut a soil body through a gear system, and the cutting coverage area reaches 90%; the PIV digital image technology comprises a high-speed camera, a laser emitting device and an image processing computer. A rectangular shield tunneling machine cutterhead is used for cutting a soil body, and a single-chip microcomputer pushing device is adopted at the rear portion to control tunneling pushing force. In the tunneling process, a laser source emission sheet is used for irradiating fluorescent particles, a high-speed camera is used for monitoring the fluorescent particles in real time, and the excavation condition is simulated according to dynamic flowing of the fluorescent particles.
Description
technical field [0001] The invention is a visual test system for simulating rectangular pipe jacking construction, which belongs to the technical field of tunnel and underground engineering. Background technique [0002] Tunnel shield construction has the characteristics of fast construction speed, low noise, and does not occupy ground traffic. The pipe jacking construction is improved on the basis of the shield tunneling construction, and the segment splicing link of the shield tunneling construction is changed to be completed in the working well. Compared with the traditional shield tunneling method, the pipe jacking method uses the overall prefabrication of the pipe section, which is easy to guarantee the structural strength, good mechanical performance, small joints, and good water resistance. Among the special-shaped shields, the rectangular shield section has the highest utilization rate and can save more space. Therefore, the experimental simulation research of rect...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G01M99/00G01N33/24G01B11/02G01C5/00
CPCG01M99/00G01M99/008G01N33/24G01B11/02G01C5/00
Inventor 梁恒辉叶文龙郑远松陈松洁莫振泽李永运倪小东钟小春
Owner 无锡地铁集团有限公司