System for testing influence of soaking condition on mechanical mechanism of prefabricated pipe gallery

Abstract

The utility model discloses a system for testing the influence of a soaking condition on the mechanical mechanism of a prefabricated pipe gallery, and belongs to the technical field of underground pipe gallery bottom stress analysis. Comprising an acrylic box body, the acrylic box body is fixedly installed on a base through a fixing mechanism, a supporting mechanism is fixedly connected to the lower portion of the base, a plurality of sets of pipe galleries are inserted into a pipe gallery installation opening in the center of the outer surface of the acrylic box body in a penetrating mode through sealing strips, and a three-dimensional laser scanner is installed at the top end of the interior of the acrylic box body through a cross beam base; a plurality of PVC branch pipelines are arranged at the bottom end in the acrylic box body and connected with a water supply mechanism through waterproof sealing adhesive tape. The device is simple in structure and easy to operate, and has better stability and adjustability. Through the combination of the three-dimensional laser scanner, the bidirectional strain rosette and the distributed strain acquisition instrument, the test data is more accurate, and the influence of the immersion condition on the mechanical mechanism of the prefabricated pipe gallery can be better known.

Description

Technical Field

[0001] The utility model relates to the technical field of force analysis of the bottom of an underground pipe gallery, in particular to a test system for the influence of the water immersion condition on the mechanical mechanism of a precast pipe gallery. Background Art

[0002] After loess foundation is wetted and collapsed by water, it has the characteristic of uneven settlement, which will inevitably cause harm to the precast pipe gallery structure built on it. At the same time, the foundation wet collapse often appears in the form of local wet collapse, which may cause the precast pipe gallery structure to crack, stagger, twist or even collapse, affecting the safe operation of the precast pipe gallery project. It is difficult to effectively evaluate the mechanical properties and deformation mechanism of the precast pipe gallery structure under the action of uneven settlement of collapsible loess foundation. Content of the Utility Model

[0003] The purpose of the utility model is to provide a test system for the influence of the water immersion condition on the mechanical mechanism of a precast pipe gallery, which solves the problem that it is difficult to effectively evaluate the mechanical properties and deformation mechanism of the precast pipe gallery structure under the action of uneven settlement of collapsible loess foundation.

[0004] To achieve the above purpose, the utility model provides a test system for the influence of the water immersion condition on the mechanical mechanism of a precast pipe gallery, including an acrylic box body, the acrylic box body is fixedly installed on a base through a fixing mechanism, a support mechanism is fixedly connected below the base, a plurality of groups of pipe galleries are inserted through a pipe gallery installation opening at the center of the outer surface of the acrylic box body through a sealing strip, a three-dimensional laser scanner is installed on the top end inside the acrylic box body through a crossbeam base, a plurality of PVC branch pipes are arranged at the bottom end inside the acrylic box body, and the PVC branch pipes are connected with a water supply mechanism through a waterproof sealing tape.

[0005] Preferably, bidirectional strain rosettes are installed at the four corners inside the pipe gallery, the bidirectional strain rosettes are electrically connected with a dynamic strain collector through a circuit, and micro earth pressure cells and strain displacement sensors are arranged at the bottom of the outer surface of the pipe gallery.

[0006] Preferably, the fixing mechanism includes a chute opened on the base, two sliders are arranged in the chute, the two sliders are connected by a spring, clamping blocks are fixedly connected above the sliders, and buffer pads are attached to the clamping blocks.

[0007] Preferably, the support mechanism includes sleeve rods arranged at the four corners below the base, limit pins are arranged on the outer surface of the sleeve rods, inner rods are sleeved inside the sleeve rods, a fixed seat is fixedly connected to the bottom of the inner rods, and vertically equidistantly and uniformly arranged limit holes are arranged on the outer surface of the inner rods.

[0008] Preferably, the water supply mechanism includes a water supply tank, a liquid level gauge is arranged on the outer surface of the water supply tank, a water inlet is opened on one side of the water supply tank, a water inlet valve is arranged on the water inlet, a water outlet is opened on the other side of the water supply tank, a water outlet valve is arranged on the water outlet, and a water outlet pipe is sleeved on the port of the water outlet. The water outlet pipe is connected to a hose through a water pump, and the hose is connected to the PVC branch pipe through a waterproof sealing tape.

[0009] Therefore, the test system for the influence of the immersion condition on the mechanical mechanism of the precast pipe gallery adopting the above structure of the present invention has the following beneficial effects:

[0010] The structure of the present invention is simple and easy to operate. The overall device is made more stable and adjustable through the fixing mechanism and the supporting mechanism. The bidirectional strain rosettes and distributed strain collectors in the pipe gallery conduct strain tests on the pipe gallery in the horizontal and vertical directions, and combined with the three-dimensional computational optical scanning technology, the test data is made more accurate. At the same time, through the miniature earth pressure cells and strain displacement sensors, pressure tests and displacement tests are carried out on the bottom of the pipe gallery, and the influence of the immersion condition on the mechanical mechanism of the precast pipe gallery can be better understood.

[0011] The technical solution of the present invention will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0012] Figure 1 It is a front structural schematic diagram of a test system for the influence of an immersion condition on the mechanical mechanism of a precast pipe gallery according to the present invention;

[0013] Figure 2 It is a side structural schematic diagram of a test system for the influence of an immersion condition on the mechanical mechanism of a precast pipe gallery according to the present invention;

[0014] Figure 3 It is a structural schematic diagram of the fixing mechanism of a test system for the influence of an immersion condition on the mechanical mechanism of a precast pipe gallery according to the present invention;

[0015] Figure 4 It is a structural schematic diagram of the water supply mechanism of a test system for the influence of an immersion condition on the mechanical mechanism of a precast pipe gallery according to the present invention;

[0016] Figure 5 It is a working process schematic diagram of the three-dimensional laser scanner for a test system for the influence of an immersion condition on the mechanical mechanism of a precast pipe gallery according to the present invention;

[0017] Reference Signs

[0018] 1. Acrylic box body, 2. PVC branch pipe, 3. Waterproof sealing tape, 4. Installation opening of pipe gallery, 5. Sealing strip, 6. Fixing mechanism, 7. Base, 8. Supporting mechanism, 9. Water supply mechanism, 10. Pipe gallery, 11. Bidirectional strain rosette, 12. Dynamic strain acquisition instrument, 13. Miniature earth pressure cell, 14. Strain type displacement sensor, 15. 3D laser scanner, 16. Beam base, 61. Slide groove, 62. Slide block, 63. Clamping block, 64. Buffer pad, 65. Spring, 81. Sleeve rod, 82. Inner rod, 83. Fixed seat, 84. Limit hole, 85. Limit pin, 91. Water supply tank, 92. Liquid level rod, 93. Water inlet, 94. Water inlet valve, 95. Water outlet, 96. Water outlet valve, 97. Outlet pipe, 98. Water pump, 99. Hose. Specific implementation mode

[0019] The technical solution of the present utility model will be further described below through the accompanying drawings and embodiments.

[0020] Unless otherwise defined, the technical terms or scientific terms used in the present utility model should have the ordinary meaning understood by those with ordinary skills in the field to which the present utility model belongs. The "first", "second" and similar words used in the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0021] Embodiment

[0022] As Figures 1-4 shown, the present utility model provides a test system for the influence of immersion conditions on the mechanical mechanism of prefabricated pipe galleries, including an acrylic box body 1. The acrylic box body 1 is fixedly installed on a base 7 through a fixing mechanism 6. A supporting mechanism 8 is fixedly connected below the base 7. A plurality of groups of pipe galleries 10 are inserted through an installation opening 4 of the pipe gallery at the center of the outer surface of the acrylic box body 1 through a sealing strip 5. A 3D laser scanner 15 is installed at the top end inside the acrylic box body 1 through a beam base 16. A plurality of PVC branch pipes 2 are arranged at the bottom end inside the acrylic box body 1. The PVC branch pipes 2 are connected to a water supply mechanism 9 through a waterproof sealing tape 3.

[0023] At the four corners inside the pipe gallery 10, bidirectional strain rosettes 11 are installed. The bidirectional strain rosettes 11 are electrically connected to a dynamic strain collector 12 through wires. At the bottom of the outer surface of the pipe gallery 10, micro earth pressure cells 13 and strain displacement sensors 14 are provided.

[0024] The fixing mechanism 6 includes a chute 61 opened on the base. Two sliders 62 are arranged in the chute 61. The two sliders 62 are connected by a spring 65. Above the sliders 62, clamping blocks 63 are fixedly connected. Buffer pads 64 are attached to the clamping blocks 63.

[0025] The supporting mechanism 8 includes sleeve rods 81 arranged at the four corners under the base. A limit pin 85 is arranged on the outer surface of the sleeve rod 81. An inner rod 82 is sleeved inside the sleeve rod 81. A fixed seat 83 is fixedly connected to the bottom of the inner rod 82. Vertically equally spaced and uniformly arranged limit holes 84 are arranged on the outer surface of the inner rod 82.

[0026] The water supply mechanism 9 includes a water supply tank 91. A liquid level gauge 92 is arranged on the outer surface of the water supply tank 91. An inlet 93 is opened on one side of the water supply tank 91. An inlet valve 94 is arranged on the inlet 93. An outlet 95 is opened on the other side of the water supply tank 91. An outlet valve 96 is arranged on the outlet 95. A water outlet pipe 97 is sleeved at the port of the outlet 95. The water outlet pipe 97 is connected to a hose 99 through a water pump 98. The hose 99 is connected to the PVC branch pipe 2 through a waterproof sealing tape 3.

[0027] Working principle: Adjust the clamping block 63 to clamp the acrylic box body 1, and adjust the limit pin 85 to adjust the inner rod 82 to a suitable height.

[0028] Connect the inlet 93, adjust the inlet valve 94 to allow water source to enter the water supply tank 91. Observe the liquid level gauge 92. After the water supply tank 91 is filled with water source, close the inlet valve 94. Adjust the outlet valve 96, and the water source is discharged from the outlet 95 and enters the PVC branch pipe 2 through the water outlet pipe 97, the water pump 98 and the hose 99.

[0029] After installing the 3D laser scanner 15 inside the acrylic box body 1, perform 3D laser scanning on the pipe gallery 10. Through means such as coordinate transformation, point cloud filtering, and hole repair, obtain the 3D model of the pipe gallery. Then, by extracting the contour lines required for shape deviation detection, import the actual contour lines of the 3D model of the pipe gallery into the computer for monitoring.

[0030] The bidirectional strain rosettes 11 and the dynamic strain collector 12 in the pipe gallery 10 perform strain tests on the pipe gallery 10. The micro earth pressure cells 13 and the strain displacement sensors 14 at the bottom of the pipe gallery 10 perform pressure tests and displacement tests on the pipe gallery.

[0031] Therefore, the present utility model adopts the above-mentioned test system for the influence of the immersed working condition on the mechanical mechanism of the precast pipe gallery, which has a simple structure and is easy to operate. The overall device is made more stable and adjustable through the fixing mechanism and the supporting mechanism. The bi-directional strain rosette and the distributed strain collector in the pipe gallery conduct strain tests on the pipe gallery in the horizontal and vertical directions, and combined with the three-dimensional computational optical scanning technology, the test data is made more accurate. At the same time, through the micro earth pressure cell and the strain type displacement sensor, the pressure test and the displacement test are carried out on the bottom of the pipe gallery, and the influence of the immersed working condition on the mechanical mechanism of the precast pipe gallery can be better understood.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present utility model, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present utility model.

Claims

1. A test system for the influence of immersion conditions on the mechanical mechanism of prefabricated pipe gallery, characterized in that: It includes an acrylic box, which is fixedly installed on a base through a fixing mechanism, a supporting mechanism is fixedly connected below the base, a pipe gallery installation opening at the center of the outer surface of the acrylic box is penetrated by a sealing strip and a plurality of pipe galleries are inserted, a three-dimensional laser scanner is installed at the top of the inside of the acrylic box through a beam base, a plurality of PVC branch pipes are arranged at the bottom of the inside of the acrylic box, and the PVC branch pipes are connected to the water supply mechanism through a waterproof sealing tape.

2. The test system for the influence of water immersion conditions on the mechanical mechanism of prefabricated pipe gallery according to claim 1 is characterized in that: Bidirectional strain gauges are installed at the four corners of the pipe gallery, and the bidirectional strain gauges are electrically connected to a dynamic strain collector through a line. A micro soil pressure box and a strain type displacement sensor are provided at the bottom of the outer surface of the pipe gallery.

3. The test system for the influence of water immersion conditions on the mechanical mechanism of prefabricated pipe gallery according to claim 2 is characterized in that: The fixing mechanism comprises a slide groove provided on the base, two slide blocks are arranged in the slide groove, the two slide blocks are connected by a spring, a clamping block is fixedly connected above the slide blocks, and a buffer pad is attached to the clamping block.

4. The test system for the effect of water immersion on the mechanical mechanism of prefabricated pipe gallery according to claim 3 is characterized in that: The support mechanism includes a sleeve rod arranged at the four corners below the base, a limit pin is arranged on the outer surface of the sleeve rod, an inner rod is sleeved inside the sleeve rod, a fixing seat is fixedly connected to the bottom of the inner rod, and a limit hole is arranged vertically equidistantly on the outer surface of the inner rod.

5. The test system for the effect of water immersion on the mechanical mechanism of prefabricated pipe gallery according to claim 4 is characterized in that: The water supply mechanism includes a water supply tank, a liquid level gauge is arranged on the outer surface of the water supply tank, a water inlet is opened on one side of the water supply tank, a water inlet valve is arranged on the water inlet, a water outlet is opened on the other side of the water supply tank, a water outlet valve is arranged on the water outlet, and a water outlet pipe is arranged on the port sleeve of the water outlet, the water outlet pipe is connected to a hose through a water pump, and the hose is connected to the PVC branch pipe through a waterproof sealing tape.

Images