A subway shield segment concrete performance test device

Abstract

The present invention relates to the field of cutting technology, and in particular to a subway shield segment concrete performance test device, comprising a base, bosses are arranged on both sides of the upper surface of the base, straight rods are respectively arranged on the upper ends of the two bosses, a limit frame is arranged on the upper ends of the straight rods, a crossbeam is slidably installed on the upper ends of the straight rods, a hydraulic pump is arranged on the upper end of the crossbeam, a mounting seat is arranged in the middle section of the crossbeam, a fixed support plate is arranged at the lower end of the crossbeam, a pressing mechanism is arranged at the lower end of the fixed support plate, a track is arranged on the upper surface of the base, a slide rail car is arranged on the upper end of the track, capping blocks are arranged on the upper ends of the two slide rail cars, and a base angle adjustment mechanism is arranged on the upper end of the slide rail car.

Description

Technical Field

[0001] The invention relates to the technical field of concrete performance test devices, and in particular to a subway shield segment concrete performance test device. Background Art

[0002] Shield segments are the main assembly components in shield tunnel construction. They are the innermost barrier of the tunnel and bear the role of resisting soil pressure, groundwater pressure and some special loads. Shield segments are usually made of high-strength impermeable concrete to ensure reliable bearing and waterproof performance. After the shield is advanced, the segments will be quickly assembled into rings, generally in a staggered assembly method to enhance the overall waterproofness of the segments.

[0003] In the block design of shield segments, in addition to standard blocks, adjacent blocks and capping blocks, there is also a specially designed trapezoidal block. The trapezoidal block is designed to meet the needs of tunnel curves to achieve tunnel turning or deviation correction. The change in the assembly position of the trapezoidal block is equivalent to the rotation of the entire segment ring, which is crucial for controlling the linearity of the shield tunnel. In practical applications, the trapezoidal block can effectively improve the propulsion posture of the shield machine and ensure the quality of the formed segment.

[0004] The shield segment is a permanent component of the tunnel structure, and its structural performance is directly related to the stability and safety of the tunnel. Through performance testing, the behavior of the segment under the design load can be verified to ensure that it can withstand soil pressure, groundwater pressure and possible special loads, thereby ensuring the safety of the tunnel project. In the prior art, performance tests are mostly conducted on conventional standard blocks, while trapezoidal blocks, which are turning components, lack special performance tests. At present, the research on the performance evaluation of shield tunnel lining structures is mainly focused on evaluating a large number of standard blocks. The capping block is a trapezoidal structure and cannot be used for conventional testing devices. The standard block has a relatively uniform bending moment distribution due to its regular arc block design. The capping block is a structural design with one end wide and the other end narrow, which requires a special fixing method. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings existing in the background technology and to propose a subway shield segment concrete performance test device.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a subway shield segment concrete performance test device, including a base, bosses are provided on both sides of the upper surface of the base, straight rods are respectively provided on the upper ends of the two bosses, a limit frame is provided on the upper ends of the straight rods, a cross beam is slidably installed on the upper ends of the straight rods, a hydraulic pump is provided on the upper end of the cross beam, a mounting seat is provided in the middle section of the cross beam, a fixed support plate is provided at the lower end of the cross beam, a pressing mechanism is provided at the lower end of the fixed support plate, a track is provided on the upper surface of the base, a slide car is provided on the upper end of the track, a capping block is provided on the upper ends of the two slide cars, and a base angle adjustment mechanism is provided on the upper end of the slide car.

[0007] Preferably, the base angle adjustment mechanism includes empty slots symmetrically opened on the upper end of the slide rail vehicle, a pitch adjusting screw is installed through one side of each of the empty slots, and each of the pitch adjusting screws is provided with a rotating rod on the outer side of the empty slot.

[0008] Preferably, a clamping platform is provided at the upper end of the slide vehicle, and connecting rings are symmetrically provided on the lower surface of the clamping platform. A limiting clamping seat is fixedly installed at the lower end of each connecting ring, and the pitch adjusting screw passes through the limiting clamping seat.

[0009] Preferably, the pressing mechanism comprises a fixed support plate fixedly installed at the lower end of the hydraulic pump output end, guide rods are installed through both sides of the fixed support plate, the guide rods pass through the cross beam, and a pressing base is provided at the lower end of the fixed support plate.

[0010] Preferably, four T-shaped rods arranged at equal angles are fixedly mounted on the lower surface of the fixed support plate, each T-shaped rod is located between the fixed support plate and the downward pressing base and is sleeved with a spring, a guide rail is opened on the lower surface of the downward pressing base, and a pressure plate adjustment mechanism is provided at the lower end of the downward pressing base.

[0011] Preferably, the pressure plate adjustment mechanism comprises two upper movable plates slidably mounted on the lower end of the lower pressing base, and each upper movable plate is provided with three equidistantly arranged fixed blocks on its upper surface, and the fixed blocks are slidably mounted inside the guide rail.

[0012] Preferably, a symmetrical straight plate is provided on the lower surface of the upper movable plate, and a rubber plate is provided at the lower ends of the two straight plates. A threaded rod is installed through every two straight plates, and a sleeve is rotatably installed on the threaded rod between the two straight plates. The outer surface of the sleeve is provided with limiting convex rings on the inner and outer sides of the straight plate, and a nut is provided on the outer surface of the sleeve between the two limiting convex rings.

[0013] Preferably, three of the slide rail vehicles are slidably mounted on the upper end of the base, wherein an anti-collision card plate is fixedly mounted on the upper end of the slide rail vehicle located in the middle.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention adopts a slide rail vehicle that can be adjusted according to the structure of the capping block. Due to the characteristics of the trapezoidal structure of the capping block being wide on one side and narrow on the other side, a base adjustment mechanism is used to adjust the position of the card table, so that the upper end of the card table fits the lower end of the capping block, forming a stable installation effect;

[0016] 2. In the pressing mechanism of the present invention, multiple springs are arranged between the fixed support plate and the pressing base as buffers to prevent the pressing base from being over-lifted during the lifting process of the hydraulic pump and causing damage to the equipment. Guide rods penetrating the crossbeam are arranged on both sides of the fixed support plate to prevent deviation during the lifting process, thereby affecting the concrete test results of the subway shield segment.

[0017] 3. An adjustable upper movable plate is provided at the lower end of the pressing base of the present invention, and the spacing between the two upper movable plates at the lower end of the pressing base is controlled by rotating the nut, thereby changing the test position to adapt to the test of capping blocks with different radii;

[0018] 4. The present invention also provides an anti-collision card plate between the two slide rail vehicles carrying the capping block to prevent the capping block from breaking and hitting the base after reaching the bending peak. The capping block is broken at the test point and split into two halves, which are buffered by the anti-collision card plate to avoid unnecessary equipment damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a subway shield segment concrete performance test device of the present invention;

[0020] Figure 2 It is a schematic structural diagram of another viewing angle of a subway shield segment concrete performance test device of the present invention;

[0021] Figure 3 This is a schematic diagram of the base structure of a subway shield segment concrete performance test device of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the pressing mechanism of a subway shield segment concrete performance test device of the present invention;

[0023] Figure 5 It is a schematic structural diagram of a pressure plate adjustment mechanism of a subway shield segment concrete performance test device of the present invention;

[0024] Figure 6 This is a schematic diagram of the base structure of a subway shield segment concrete performance test device of the present invention;

[0025] Figure 7 It is a schematic structural diagram of a slide rail vehicle of a subway shield segment concrete performance test device of the present invention;

[0026] Figure 8The present invention is a schematic diagram of a fixture structure of a subway shield segment concrete performance testing device.

[0027] 1. Base; 2. Track; 3. Boss; 4. Straight rod; 5. Limit frame; 6. Hydraulic pump; 7. Crossbeam; 8. Capping block; 9. Slide car; 10. Anti-collision card plate; 101. Fixed support plate; 102. Guide rod; 103. Mounting seat; 104. T-bar; 105. Spring; 106. Press down base; 107. Guide rail; 201. Upper moving plate; 202. Straight plate; 203. Threaded rod; 204. Limiting convex ring; 205. Nut; 206. Fixed block; 207. Rubber sheet; 208. Casing; 301. Pitch adjusting screw; 302. Rotating rod; 303. Empty slot; 304. Card platform; 305. Connecting ring; 306. Limiting card seat. DETAILED DESCRIPTION

[0028] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0029] like Figure 1-Figure 8 A subway shield segment concrete performance test device shown in the figure comprises a base 1, bosses 3 are arranged on both sides of the upper surface of the base 1, straight rods 4 are respectively arranged on the upper ends of the two bosses 3, a limit frame 5 is arranged on the upper end of the straight rod 4, a crossbeam 7 is slidably installed on the upper end of the straight rod 4, a hydraulic pump 6 is arranged on the upper end of the crossbeam 7, a mounting seat 103 is arranged in the middle section of the crossbeam 7, a fixed support plate 101 is arranged at the lower end of the crossbeam 7, a pressing mechanism is arranged at the lower end of the fixed support plate 101, a track 2 is arranged on the upper surface of the base 1, a slide rail car 9 is arranged on the upper end of the track 2, a capping block 8 is arranged on the upper ends of the two slide rail cars 9, and a base angle adjustment mechanism is arranged on the upper end of the slide rail car 9.

[0030] like Figure 2-Figure 5 As shown, the pressing mechanism includes a fixed support plate 101 fixedly installed at the lower end of the output end of the hydraulic pump 6, guide rods 102 are installed on both sides of the fixed support plate 101, the guide rods 102 penetrate the cross beam 7, and a pressing base 106 is provided at the lower end of the fixed support plate 101. The guide rods 102 prevent the hydraulic pump 6 from being offset during the lifting process and affecting the accuracy of the performance test data.

[0031] Four T-bars 104 arranged at equal angles are fixedly installed on the lower surface of the fixed support plate 101, and each T-bar 104 is located between the fixed support plate 101 and the downward pressing base 106 and is sleeved with a spring 105. A guide rail 107 is provided on the lower surface of the downward pressing base 106, and a pressure plate adjustment mechanism is provided at the lower end of the downward pressing base 106. The elastic force of the multiple springs 105 plays a buffering role to avoid collision between the downward pressing base 106 and the fixed support plate 101 during the lifting process, which would cause damage to the equipment.

[0032] The pressure plate adjustment mechanism includes two upper movable plates 201 slidably mounted on the lower end of the lower pressure base 106. Each upper movable plate 201 is provided with three equidistantly arranged fixed blocks 206 on the upper surface. The fixed blocks 206 are slidably mounted inside the guide rail 107. The positions on the upper surfaces of the capping blocks 8 with different radii that require bending resistance tests are different and need to be adjusted according to the test objectives.

[0033] A symmetrical straight plate 202 is provided on the lower surface of the upper movable plate 201, and a rubber plate 207 is provided at the lower ends of the two straight plates 202. A threaded rod 203 is installed through every two straight plates 202, and the threaded rod 203 is rotatably installed with a sleeve 208 between the two straight plates 202. The outer surface of the sleeve 208 is located on the inner and outer sides of the straight plate 202 and is provided with a limiting convex ring 204. The outer surface of the sleeve 208 is located between the two limiting convex rings 204 and is provided with a nut 205. The staff rotates the nut 205 according to the test requirements, so that the sleeve 208 moves along the surface of the threaded rod 203, thereby changing the distance between the two upper movable plates 201. The rubber plates 207 set at the lower ends of the two straight plates 202 prevent damage to the equipment during the test process.

[0034] like Figure 6 As shown, three slide rail vehicles 9 are slidably installed on the upper end of the base 1, among which an anti-collision card plate 10 is fixedly installed on the upper end of the slide rail vehicle 9 in the middle. Since the capping block 8 is an arched structure, it breaks at the center point after reaching the peak load-bearing value during the bending test and then falls downward. The anti-collision card plate 10 can buffer the two broken capping blocks 8 and prevent the broken capping blocks 8 from directly hitting the base 1 and causing unnecessary equipment damage.

[0035] like Figure 7-Figure 8 As shown, the base angle adjustment mechanism includes empty slots 303 symmetrically opened on the upper end of the slide rail vehicle 9, a pitch adjusting screw 301 is installed through one side of each empty slot 303, and each pitch adjusting screw 301 is provided with a rotating rod 302 on the outer side of the empty slot 303.

[0036] A card platform 304 is provided at the upper end of the slide vehicle 9, and connecting rings 305 are symmetrically provided on the lower surface of the card platform 304. A limit card seat 306 is fixedly installed at the lower end of each connecting ring 305, and the distance adjusting screw 301 passes through the limit card seat 306. According to the curvature of the bottom edge of the test capping block 8, the operator rotates the rotating rods 302 on both sides respectively, so that the limit card seat 306 is displaced along the inside of the empty groove 303. A connecting ring 305 is fixedly installed on the upper end of each limit card seat 306, and the limit card seat 306 is installed at the lower end of the card platform 304 through the connecting ring 305. The limit card seats 306 on both sides are offset by adjusting different distance adjusting screws 301, thereby changing the angle of the card platform 304.

[0037] Working principle: According to the curvature of the bottom edge of the test capping block 8, the operator sets the base angle adjustment mechanism at the upper end of the slide vehicle 9, and rotates the rotating rod 302 to move the two limit clamps 306 respectively. Two connecting rings 305 are rotatably installed on the lower end of the clamping table 304, and the connecting ring 305 is fixedly installed at the lower end of the limit clamp 306. The angle of the clamping table 304 changes due to the different positions of the two limit clamps 306, thereby generating a position offset to form an oblique angle to fit the lower end of the capping block 8.

[0038] The card table 304 is an inclined L-shaped structure. When the capping block 8 is placed on the upper end of the card table 304, it can be stably fixed on the upper ends of the two card tables 304, and the trapezoidal structure of the capping block 8 can be supported by changing the angle.

[0039] After the capping block 8 is placed, the upper movable plate 201 is adjusted according to the upper surface of the capping block 8. Two straight plates 202 are symmetrically installed on the lower surface of the upper movable plate 201. Two threaded rods 203 are installed through each of the two straight plates 202. The threaded rods 203 connect the two sets of upper movable plates 201. A sleeve 208 is provided between the two straight plates 202. The sleeve 208 is rotatably installed on the outer surface of the threaded rod 203. When the position of the upper movable plate 201 needs to be adjusted, the nut 205 fixedly installed on the outer side of the sleeve 208 is rotated, and the limiting convex rings 204 on both sides of the sleeve 208 make the sleeve 208 installed between the two straight plates 202. When the nut 205 rotates, it drives the upper movable plate 201 to move along the guide rail 107. The rubber plate 207 is provided to be close to the upper surface of the capping block 8 to prevent damage caused by direct contact with the equipment.

[0040] Bosses 3 are respectively provided at the upper end of the base 1, and two straight rods 4 are fixedly installed on the upper surface of the boss 3 on each side. A limit frame 5 is fixedly installed on the upper end of the straight rod 4 to prevent the straight rod 4 from shaking. Two groups of straight rods 4 are located at the lower end of the limit frame 5 and a crossbeam 7 is fixedly installed. A mounting seat 103 is fixedly installed in the middle position of the crossbeam 7. A hydraulic pump 6 is installed on the upper end of the mounting seat 103 as a support. The output end of the hydraulic pump 6 passes through the mounting seat 103 and the crossbeam 7. The output end of the hydraulic pump 6 is located at the lower end of the mounting seat 103 and a fixed support plate 101 is provided. Guide rods 102 passing through the crossbeam 7 are respectively provided on both sides of the fixed support plate 101 to prevent the hydraulic pump 6 from deflecting during the lifting process, thereby affecting the test results. Four T-shaped rods 104 arranged at equal angles are provided between the pressing base 106 and the fixed support plate 101. The T-shaped rods 104 all penetrate the upper surface of the pressing base 106, and the outer surface of the T-shaped rods 104 is sleeved with springs 105. The elasticity of the springs 105 themselves prevents the fixed support plate 101 and the pressing base 106 from being excessively squeezed and collided during the lifting of the equipment.

[0041] The operator sets the downward pressure of the hydraulic pump 6 in sections according to the test purpose, observes the deformation and damage of the capping block 8, and records the damage characteristics, so as to improve the bending resistance of the capping block 8 according to the results.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A subway shield segment concrete performance test device, comprising a base (1), characterized in that: Bosses (3) are provided on both sides of the upper surface of the base (1), and straight rods (4) are provided at the upper ends of the two bosses (3), and a limit frame (5) is provided at the upper ends of the straight rods (4). A crossbeam (7) is slidably mounted on the upper ends of the straight rods (4), and a hydraulic pump (6) is provided at the upper end of the crossbeam (7). A mounting seat (103) is provided in the middle section of the crossbeam (7), and a fixed support plate (101) is provided at the lower end of the crossbeam (7). A downward pressing mechanism is provided at the lower end of the fixed support plate (101). A track (2) is provided on the upper surface of the base (1), and a slide rail car (9) is provided at the upper end of the track (2). Capping blocks (8) are provided at the upper ends of the two slide rail cars (9), and a base angle adjustment mechanism is provided at the upper end of the slide rail car (9); The base angle adjustment mechanism comprises empty slots (303) symmetrically arranged at the upper end of the slide rail vehicle (9), a pitch adjustment screw (301) is installed through one side of each of the empty slots (303), and each of the pitch adjustment screws (301) is provided with a rotating rod (302) located outside the empty slot (303); The upper end of the rail vehicle (9) is provided with a clamping platform (304), the lower surface of the clamping platform (304) is symmetrically provided with connecting rings (305), the lower end of each connecting ring (305) is fixedly mounted with a limit clamping seat (306), and the pitch adjusting screw (301) passes through the limit clamping seat (306); Three slide rail vehicles (9) are slidably mounted on the upper end of the base (1), wherein an anti-collision clamping plate (10) is fixedly mounted on the upper end of the slide rail vehicle (9) located in the middle.

2. A subway shield segment concrete performance test device according to claim 1, characterized in that: The pressing mechanism comprises a fixed support plate (101) fixedly mounted at the lower end of the output end of the hydraulic pump (6), guide rods (102) being installed through both sides of the fixed support plate (101), the guide rods (102) being inserted through the crossbeam (7), and a pressing base (106) being provided at the lower end of the fixed support plate (101).

3. A subway shield segment concrete performance test device according to claim 2, characterized in that: Four T-shaped rods (104) arranged at equal angles are fixedly mounted on the lower surface of the fixed support plate (101); each of the T-shaped rods (104) is located between the fixed support plate (101) and a downward pressing base (106) and is sleeved with a spring (105); a guide rail (107) is provided on the lower surface of the downward pressing base (106); and a pressing plate adjustment mechanism is provided at the lower end of the downward pressing base (106).

4. A subway shield segment concrete performance test device according to claim 3, characterized in that: The pressure plate adjustment mechanism comprises two upper movable plates (201) slidably mounted on the lower end of the lower pressing base (106), and each upper movable plate (201) is provided with three equidistantly arranged fixed blocks (206) on its upper surface, and the fixed blocks (206) are slidably mounted inside the guide rail (107).

5. A subway shield segment concrete performance test device according to claim 4, characterized in that: The lower surface of the upper movable plate (201) is provided with symmetrical straight plates (202), the lower ends of the two straight plates (202) are provided with rubber plates (207), a threaded rod (203) is installed through each of the two straight plates (202), the threaded rod (203) is rotatably installed with a sleeve (208) between the two straight plates (202), the outer surface of the sleeve (208) is provided with limiting convex rings (204) on the inner and outer sides of the straight plates (202), and a nut (205) is provided on the outer surface of the sleeve (208) between the two limiting convex rings (204).

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