Structural performance detection device for tunnel construction

Abstract

The invention relates to the field of engineering testing, in particular to a structural performance detection device for tunnel construction, which comprises a hollow hydraulic cylinder, a fixed block, a locking block and the like, the telescopic end of the hollow hydraulic cylinder is connected with two fixing blocks; a first sliding groove is formed in each fixing block. And a locking block is connected into each sliding groove I in a sliding manner. When the anchor ring is installed, the two fixing blocks are combined through the steel bar, the steel bar is located between all the clamping blocks, the anchor ring does not need to be arranged on the steel bar in a sleeving mode from top to bottom, and the situation that an existing anchor ring is installed in a sliding mode, collides with the steel bar and is abraded, the fixing effect of the anchor ring is affected, and the service life is shortened is avoided; and the anchor ring parts do not need to be mounted and dismounted along the steel bars one by one, so that the mounting and dismounting efficiency of the anchor ring is improved.

Description

Technical Field

[0001] The present invention relates to the field of engineering testing, and particularly to a structural performance detection device for tunnel construction. Background Art

[0002] Tunnel rebar planting is an engineering technology that implants steel bars into existing concrete structures to enhance connection strength, improve structural stability and bearing capacity. It is widely used in scenarios such as the connection between new and old concrete, structural reinforcement, and equipment fixing in tunnel projects. After the steel bars are implanted in place, pull-out tests need to be carried out to detect whether the structural strength of the connection between the steel bars and the concrete reaches the estimate. When the existing pull-out test is carried out by a pull tester, first, a hollow hydraulic cylinder is sleeved on the steel bar, the hydraulic cylinder is placed on the ground by moving downward, the steel bar passes through the middle of the hydraulic cylinder, then an anchor ring is sleeved on the steel bar and moved downward to contact the telescopic end of the hydraulic cylinder, and then a wedge block is wedged between the anchor ring and the steel bar to fix the anchor ring and the steel bar. After that, the hydraulic cylinder extends to push the anchor ring to pull out the steel bar, and the tensile pull-out coefficient of the steel bar is obtained from the pressure coefficient of the hydraulic cylinder. However, when the anchor ring moves downward along the steel bar, due to manual operation, the anchor ring is inevitably bumped against the surface of the steel bar, which is likely to cause wear to the anchor ring in the long term, shorten the service life of the anchor ring, and affect the tightness of the fit between the anchor ring and the wedge block, resulting in unstable fixation of the anchor ring and the steel bar to be tested and affecting the pull-out test. Summary of the Invention

[0003] In order to overcome the disadvantages that when installing the anchor ring, manual operation inevitably causes the anchor ring to bump against the steel bar, which is likely to cause wear to the anchor ring and shorten its service life in the long term, affect the fit between the anchor ring and the wedge block, resulting in unstable fixation of the anchor ring and the steel bar to be tested, and affecting the stability of the pull-out test, the present invention provides a structural performance detection device for tunnel construction.

[0004] The technical solution of the present invention is: a structural performance detection device for tunnel construction, including a hollow hydraulic cylinder; further including a fixing block, a locking block, a wedge block, a connecting rod, a mounting plate, a C-shaped block, a support plate, a support rod, and a clamping strip; the telescopic end of the hollow hydraulic cylinder is connected with two fixing blocks; the two fixing blocks are combined into a ring shape; each fixing block is provided with a chute one; each chute one is slidably connected with a locking block; the locking block is in a semi-circular ring shape; the two fixing blocks are jointly connected with a plurality of wedge blocks; each wedge block is detachably connected with a rubber pad; each wedge block is fixedly connected with a sliding block; each inner circumferential surface of the fixing block is provided with a chute two; the sliding block slides along the chute two; at least two support rods are arranged beside the fixing block; all the support rods are jointly connected with a support plate, and the support rod and the support plate are connected by threads; a connecting rod passes through the support plate, and the connecting rod is located directly above the center of the fixing block; the bottom of the connecting rod is fixedly connected with a mounting plate; two C-shaped blocks for pulling out the fixing block are slidably connected to both ends of the mounting plate; a clamping strip is inserted at the top of the connecting rod.

[0005] As a preferred technical solution of the present invention, the vertical distance between the upper surface of the locking block and the bottom surface of the first chute is 5 mm.

[0006] As a preferred technical solution of the present invention, a chamfer is provided at the end edge of the locking block along the sliding direction of the first chute.

[0007] As a preferred technical solution of the present invention, a chamfer is provided at the end edge of the sliding block along the sliding direction of the second chute.

[0008] As a preferred technical solution of the present invention, the surface of the C-shaped block is a rough surface.

[0009] As a preferred technical solution of the present invention, the bottom surface of the support rod is a rough surface.

[0010] As a preferred technical solution of the present invention, a holding portion is provided at the top of the support rod.

[0011] As a preferred technical solution of the present invention, it further includes a screw rod and a pressing piece; the connecting rod is internally threaded with the screw rod, and the bottom of the screw rod penetrates through the connecting rod and the mounting plate; a connecting block is fixedly connected to the top of the screw rod; the clamping strip is inserted into the connecting block; a pressing piece is fixedly connected to the bottom of the screw rod.

[0012] As a preferred technical solution of the present invention, both ends of the clamping strip are arc-shaped.

[0013] As a preferred technical solution of the present invention, a rubber layer is provided on the bottom surface of the pressing piece.

[0014] The present invention has the following advantages: When installing the anchor ring of the present invention, the two fixing blocks are combined across the steel bar, the steel bar is located between all the clamping blocks and is surrounded by three clamping blocks, and there is no need to sleeved the anchor ring onto the steel bar from top to bottom. This avoids the collision and wear between the anchor ring and the steel bar during the downward movement during the installation of the existing anchor ring, which affects the fixing effect of the anchor ring and shortens the service life. When disassembling, only need to rotate the locking block to unlock the fixing block, then the anchor ring of the present invention can be disassembled, without installing and disassembling the anchor ring parts one by one along the steel bar, which speeds up the installation and disassembly efficiency of the anchor ring; In addition, different from the existing anchor ring that is fixed by hammering or other methods and also needs to be removed by external forces such as hammering when disassembling, the anchor ring structure of the present invention will not cause wear to the anchor ring during disassembly and installation.

[0015] Fix the anchor ring formed by the fixing block, the locking block and the clamping block on the exposed steel bar. The connecting rod, the mounting plate, the C-shaped block, the support plate, the support rod and the clamping strip form an extension frame and are connected to the anchor ring. The hollow hydraulic cylinder is located on the extension frame, and the anchor ring is pulled for a pull-out test through the extension frame, so as to realize the pull-out test of the short steel bar without a threaded connection hole. Compared with the existing test using a threaded extension rod, the present invention has a wide application range and high practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the structural performance detection device for tunnel construction of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of all the fixing blocks, locking blocks and clamping blocks of the present invention combined into an anchor ring; Figure 3 This is a three-dimensional structural schematic diagram of the combination of the fixing block, locking block and clamping block of the present invention; Figure 4 This is a three-dimensional structural schematic diagram of the combination of the hollow hydraulic cylinder, locking block, connecting rod, mounting plate, C-shaped block, support plate, support rod and clamping strip of the present invention; Figure 5 This is a three-dimensional structural schematic diagram of the combination of the connecting rod, mounting plate, C-shaped block, support plate, support rod and clamping strip of the present invention; Figure 6 This is a three-dimensional structural schematic diagram of the combination of the fixing block, locking block and clamping block of the present invention fixed on the short steel bar; Figure 7 This is a three-dimensional structural schematic diagram of the mounting plate and the support plate adjusted to a vertically parallel arrangement state of the present invention; Figure 8 This is a side view of the combination of the connecting block, clamping strip, screw rod and pressing piece of the present invention.

[0017] Wherein: 1 - hollow hydraulic cylinder, 2 - fixing block, 201 - first chute, 202 - second chute, 3 - locking block, 4 - clamping block, 41 - rubber pad, 42 - sliding block, 5 - connecting rod, 501 - connecting block, 6 - mounting plate, 7 - C-shaped block, 8 - support plate, 9 - support rod, 10 - clamping strip, 11 - screw rod, 12 - pressing piece. Detailed implementation mode

[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but it is not limited to the present invention.

[0019] Embodiment 1 As Figures 1-8 shown, a structural performance detection device for tunnel construction includes a hollow hydraulic cylinder 1; a channel for the steel bar to pass through is provided in the middle of the hollow hydraulic cylinder 1; the hollow hydraulic cylinder 1 is externally connected to a manual pump through a connecting pipe; It also includes a fixing block 2, a locking block 3, a clamping block 4, a connecting rod 5, a mounting plate 6, a C-shaped block 7, a support plate 8, a support rod 9 and a clamping strip 10; the telescopic end of the hollow hydraulic cylinder 1 is connected with two fixing blocks 2; the two fixing blocks 2 are combined into a ring shape; a first chute 201 is formed on the outer circumferential surface of each fixing block 2; a locking block 3 is slidably connected in each first chute 201; the locking block 3 is in a semi-circular ring shape; the two fixing blocks 2 are jointly connected with three clamping blocks 4 distributed in a ring shape; a rubber pad 41 is detachably connected to each clamping block 4; a sliding block 42 is welded to each clamping block 4; a second chute 202 is formed on the inner circumferential surface of each fixing block 2; the sliding block 42 slides along the second chute 202; two support rods 9 are arranged beside the fixing block 2; all the support rods 9 are jointly connected with a support plate 8, and the support rods 9 and the support plate 8 are connected by threads; a connecting rod 5 passes through the support plate 8, and the connecting rod 5 is located directly above the center of the fixing block 2; the bottom of the connecting rod 5 is fixedly connected with a mounting plate 6; a C-shaped block 7 is slidably connected to each end of the mounting plate 6; a clamping strip 10 is inserted into the top of the connecting rod 5.

[0020] The vertical distance between the upper surface of the locking block 3 and the bottom surface of the first chute 201 is 5 mm, which is beneficial to the sliding of the locking block 3 in the first chute 201.

[0021] A chamfer is formed at the end edge of the locking block 3 along the sliding direction of the first chute 201, which is beneficial to the locking block 3 sliding into the first chute 201 of another fixing block 2.

[0022] A chamfer is formed at the end edge of the sliding block 42 along the sliding direction of the second chute 202, which is beneficial to the sliding block 42 sliding into the second chute 202.

[0023] The surface of the C-shaped block 7 is a rough surface, which increases the friction force in contact with the bottom surface of the fixing block 2 and prevents sliding misalignment with the fixing block 2 when a pulling force is applied.

[0024] The bottom surface of the support rod 9 is a rough surface, which increases the friction force between the support rod 9 and the concrete surface and improves the stability of the present invention during the pulling test.

[0025] A holding part is arranged at the top of the support rod 9, which is convenient for the tester to rotate the support rod 9 for disassembly and assembly from the support plate 8.

[0026] The usage steps of the structural performance detection device for tunnel construction of the present invention are as follows: The user first sleeved the hollow hydraulic cylinder 1 onto the steel bar to be tested. As Figure 1 shown, the bottom of the hollow hydraulic cylinder 1 contacts the ground; in the initial state, as Figure 3As shown in the figure, the cross-sections of the fixed block 2 and the locking block 3 are flush. When conducting a pulling test on a long exposed steel bar, first slide the two clamping blocks 4 onto a fixed block 2 through the sliding block 42, then install the remaining one on the other fixed block 2 in the same way. After that, combine the two fixed blocks 2 across the steel bar. The steel bar is located between all the clamping blocks 4 and is surrounded by three clamping blocks 4. The rubber pads 41 are correspondingly pressed against the surface of the steel bar and fit tightly. The two fixed blocks 2 are combined into a complete ring (the two locking blocks 3 also form a complete ring, and at this time, the joint of the two locking blocks 3 is aligned with the joint of the two fixed blocks 2). Then rotate the two locking blocks 3, as Figure 2 shown in the figure, so that the middle parts of the two locking blocks 3 are respectively aligned with the joints of the two fixed blocks 2. The locking blocks 3 lock the two fixed blocks 2 together. At this time, there is a gap for placing the clamping blocks 4 between the steel bar and the inner side wall of the fixed block 2. At this time, all the fixed blocks 2, locking blocks 3, and clamping blocks 4 form an anchor ring, and the anchor ring is stuck with the steel bar. Therefore, when the anchor ring of the present invention is fixed to the steel bar, there is no need to put the anchor ring onto the steel bar from top to bottom, avoiding the collision and wear between the anchor ring and the steel bar during the downward movement, which affects the fixing effect of the anchor ring and shortens the service life. And different from the existing ones, when disassembling the anchor ring of the present invention, just rotate the locking block 3 to stop locking to the fixed block 2, and then the anchor ring of the present invention can be disassembled. There is no need to install and disassemble the anchor ring parts one by one along the steel bar, which speeds up the installation and disassembly efficiency of the anchor ring. And when disassembling the anchor ring, different from the existing anchor ring that needs to be hammered and other methods to be firmly fixed and then hammered and other external forces are needed to remove the tightened anchor ring, the anchor ring structure of the present invention will not cause wear to the anchor ring during both disassembly and installation. And through the close contact between the rubber pads 41 on the clamping blocks 4 and the surface of the steel bar, due to the deformation adaptability of the rubber pads 41, the anchor ring structure of the present invention can be adapted to tensile tests on steel bars of different sizes, with high practicality.

[0027] After the anchor ring is installed, the external manual pump and the hollow hydraulic cylinder 1 are connected through a connecting pipe. The manual pump is controlled to pressurize the hollow hydraulic cylinder 1. After the telescopic end of the hollow hydraulic cylinder 1 extends and contacts the bottom of the fixed block 2, the pressure record of the manual pump is cleared. Then, the manual pump is controlled again to pressurize the hollow hydraulic cylinder 1. The telescopic end of the hollow hydraulic cylinder 1 will exert pressure on the fixed block 2. The fixed block 2, the locking block 3, and the clamping block 4 form an anchor ring that will apply an upward pulling force to the steel bar. The tester obtains the tensile and pull-out performance of the steel bar according to the pressure parameters on the manual pump and converts it to obtain the structural strength of the connection between the steel bar and the concrete. It should be noted that when using the existing anchor ring structure to apply an upward pulling force to the steel bar, since the anchor ring structure needs to be in close contact with the steel bar to form a stable connection, and the anchor ring structure is subjected to the thrust of the hollow hydraulic cylinder 1, there will inevitably be some wear between the anchor ring structure and the steel bar, reducing the service life of the anchor ring structure. Therefore, the anchor ring structure of the present invention is in close contact with the steel bar through the rubber pad 41, and the clamping block 4 and the rubber pad 41 of the anchor ring structure of the present invention are set to be detachably connected. The rubber pad 41 is a vulnerable part. After the rubber pad 41 is worn to the point where it cannot be used, it can be quickly replaced. Moreover, the cost of the rubber pad 41 itself is low, reducing the overall cost of the pull-out test.

[0028] When the length of the part of the steel bar to be tested exposed outside the concrete is shorter than the length of the hollow hydraulic cylinder 1, it is impossible to place the hollow hydraulic cylinder 1 under the anchor ring for the pull-out test. In the existing situation, by adding a threaded rod to the steel bar to extend the length of the steel bar, but not all steel bars are provided with threaded holes for connecting the threaded rod. Therefore, the limitation of this method is large and it cannot be widely applied. Therefore, the present invention forms an extension frame through the connecting rod 5, the mounting plate 6, the C-shaped block 7, the support plate 8, the support rod 9, and the clamping strip 10, which is convenient for the pull-out test of short steel bars without threaded connection holes. The specific operation process is as follows: First, fix the anchor ring formed by the fixed block 2, the locking block 3, and the clamping block 4 on the exposed short steel bar, and the top of the steel bar extends out of the anchor ring. Then, place the extension frame above the anchor ring and the steel bar. The bottom of the support rod 9 contacts the concrete surface around the steel bar to form a support. At this time, as Figure 5As shown in the figure, the fixed block 2 is located between the upper and lower horizontal edges of the C-shaped block 7. Then, push the two C-shaped blocks 7 towards each other along the mounting plate 6 so that the lower side of the C-shaped block 7 is located below the fixed block 2. Then, sleeved the hollow hydraulic cylinder 1 on the connecting rod 5 (at this time, the clamping strip 10 is not installed on the connecting rod 5). The top of the connecting rod 5 will pass through the hollow hydraulic cylinder 1. The bottom of the hollow hydraulic cylinder 1 is placed on the support plate 8, and the support plate 8 is supported by the support rod 9 and the ground, so that the hollow hydraulic cylinder 1 has a stable support. Then, pull the connecting rod 5 to drive the mounting plate 6 to move upward, so that the upper surface of the lower horizontal edge of the C-shaped block 7 contacts the lower surface of the fixed block 2. Then, insert the clamping strip 10 into the top of the connecting rod 5. The hollow hydraulic cylinder 1 is located between the support plate 8 and the clamping strip 10. Then, control the telescopic end of the hollow hydraulic cylinder 1 to extend through the manual pump to contact the lower surface of the clamping strip 10. Then, clear the pressure record of the manual pump. Then, control the manual pump to pressurize the hollow hydraulic cylinder 1. The pressure applied by the telescopic end of the hollow hydraulic cylinder 1 will push the clamping strip 10 to pull the connecting rod 5. The connecting rod 5 pulls the mounting plate 6 and the C-shaped block 7. The C-shaped block 7 pulls the anchor ring, and the anchor ring transmits the pulling pressure to the short steel bar fixed thereto for the pulling test. Thus, the present invention realizes the pulling test on the short steel bar without a threaded connection hole.

[0029] Further, there will be a situation where the arrangement of adjacent steel bars is close. Since the connecting rod 5 and the support plate 8 are inserted, the two can rotate relative to each other. As Figure 7 shown, the mounting plate 6 and the support plate 8 can be adjusted to a state of being arranged parallel to each other up and down. At the same time, the support rod 9 and the support plate 8 are threadedly connected. It should be noted that when installing the extension frame, the support rod 9 is initially separated from the support plate 8 to avoid the support rod 9 restricting the initial state of the C-shaped block 7, resulting in the distance between adjacent C-shaped blocks 7 being less than the diameter of the combination of the two fixed blocks 2, affecting the installation of the extension frame; when installing the extension frame in the case where the arrangement of adjacent steel bars is close, select a suitable installation angle according to the gap between adjacent steel bars so that the position relationship between the extension frame and the steel bar is as Figure 7 shown. Place the extension frame in place except for the support rod 9. Then, make the lower side of the C-shaped block 7 contact the anchor ring. Then, screw the two support rods 9 into the support plate 8 respectively. The bottoms of the two support rods 9 contact the concrete surface to form a support. Thus, the connection between the extension frame and the anchor ring is completed. Then, install the hollow hydraulic cylinder 1 on the connecting rod 5 and insert the clamping strip 10 into the connecting rod 5 to contact the telescopic end of the hollow hydraulic cylinder 1, and then the pulling test can be carried out.

[0030] Furthermore, for the arrangement of steel bars where there is not enough space to accommodate the mounting plate 6, the C-shaped block 7, the support plate 8 and the support rod 9 between adjacent and close steel bars, the overall height of the extension frame can be increased by increasing the length of the support rod 9. Similarly, install the anchor ring on the top of the long steel bar and then connect it to the extension frame, and then the pulling test can be carried out.

[0031] According to the above steps, we can know that the present invention has the following effects: When the anchor ring of the present invention is installed, the two fixing blocks 2 are combined across the steel bar. The steel bar is located between all the clamping blocks 4 and is surrounded by three clamping blocks 4. There is no need to sleeved the anchor ring onto the steel bar from top to bottom, which avoids the collision and wear between the anchor ring and the steel bar when the anchor ring moves downward, affecting the fixing effect of the anchor ring and shortening the service life. When disassembling, only need to rotate the locking block 3 to unlock the fixing block 2, then the anchor ring of the present invention can be disassembled. There is no need to install and disassemble the anchor ring parts one by one along the steel bar, which improves the installation and disassembly efficiency of the anchor ring. In addition, different from the existing anchor ring that is fixed by hammering or other methods and also requires external forces such as hammering to remove the fastened anchor ring during disassembly, the anchor ring structure of the present invention will not cause wear to the anchor ring during both disassembly and installation.

[0032] Fix the anchor ring formed by the fixing block 2, the locking block 3 and the clamping block 4 on the exposed steel bar. The connecting rod 5, the mounting plate 6, the C-shaped block 7, the support plate 8, the support rod 9 and the clamping strip 10 form an extension frame and are connected to the anchor ring. The hollow hydraulic cylinder 1 is located on the extension frame, and the anchor ring is pulled through the extension frame for a pull-out test, so as to realize the pull-out test on the short steel bar without threaded connection holes. Compared with the existing test using a threaded extension rod, the present invention has a wide application range and high practicability.

[0033] The additional technical effects of the present invention are as follows: As Figure 3 shown, the vertical distance between the upper surface of the locking block 3 and the bottom surface of the first chute 201 is 5 mm, which is beneficial to the sliding of the locking block 3 in the first chute 201.

[0034] As Figure 3 shown, a chamfer is provided at the end edge of the locking block 3 along the sliding direction of the first chute 201, which is beneficial to the locking block 3 sliding into the first chute 201 of another fixing block 2; a chamfer is provided at the end edge of the sliding block 42 along the sliding direction of the second chute 202, which is beneficial to the sliding block 42 sliding into the second chute 202.

[0035] Embodiment 2 On the basis of Embodiment 1, as Figure 5 , Figure 7 and Figure 8 shown, it further includes a screw rod 11 and a pressing piece 12; the connecting rod 5 is internally threaded with the screw rod 11, and the bottom of the screw rod 11 penetrates through the connecting rod 5 and the mounting plate 6; a connecting block 501 is fixedly connected to the top of the screw rod 11; the clamping strip 10 is inserted into the connecting block 501; a pressing piece 12 is fixedly connected to the bottom of the screw rod 11.

[0036] Both ends of the clamping strip 10 are arc-shaped, which is beneficial to inserting into the connecting block 501.

[0037] A rubber layer is provided on the bottom surface of the pressing piece 12 to increase the friction with the top of the steel bar.

[0038] The following problems will also be encountered when using the present invention to conduct a pull-out test on the planted steel bars in the tunnel: When the planted part in the tunnel is in a horizontal state on the side wall and the exposed part of the steel bars on the side wall is short, it is necessary to use the extension frame composed of the connecting rod 5, the mounting plate 6, the C-shaped block 7, the support plate 8, the support rod 9 and the clamping strip 10 to conduct the pull-out test. When the anchor ring formed by the fixing block 2, the locking block 3 and the clamping block 4 is fixed on the exposed steel bar, and then the extension frame is connected to the anchor ring, at this time, the extension frame is movably connected to the anchor ring, and it is necessary for someone to hold the extension frame and then install the hollow hydraulic cylinder 1. Under the single-person operation, the extension frame and the anchor ring are likely to shift or even fall off, affecting the pull-out test result. Furthermore, a screw rod 11 is threadedly connected inside the connecting rod 5. When conducting a pull-out test on the steel bars on the side wall, the tester first fixes the anchor ring formed by the fixing block 2, the locking block 3 and the clamping block 4 on the exposed steel bar, and the top of the steel bar extends out of the anchor ring. Then, the extension frame is connected to the anchor ring. First, make the bottom of the support rod 9 contact the tunnel side wall to form a support, and make the two C-shaped blocks 7 contact the fixing block 2. Then, the tester inserts the clamping strip 10 into the connecting block 501, holds the clamping strip 10 and drives the connecting block 501 and the screw rod 11 to rotate clockwise. The screw rod 11 will move relative to the connecting rod 5 towards the fixing block 2, forcing the pressing piece 12 to press on the top of the exposed steel bar. Thus, as Figure 8 shown, the extension frame is fixed on the anchor ring and the steel bar through the C-shaped block 7 and the pressing piece 12. Then, the tester can release the extension frame, pull out the clamping strip 10, sleeve the hollow hydraulic cylinder 1 on the connecting rod 5, insert the clamping strip 10 back, control the telescopic end of the hollow hydraulic cylinder 1 to extend and contact the clamping strip 10, clear the pressure record of the manual pump, and then control the telescopic end of the hollow hydraulic cylinder 1 to extend through the manual pump to conduct the pull-out test. Since the extension frame is fixed on the anchor ring and the steel bar through the C-shaped block 7 and the pressing piece 12, it is convenient for single-person operation when conducting a pull-out test on the side-wall steel bars, preventing the anchor ring and the extension frame from shifting or even falling off, which affects the pull-out test result.

[0039] The present invention also has the following additional effects: The clamping strip 10 is not only used to contact the telescopic end of the hollow hydraulic cylinder 1, but also can be used as the rotating rod of the connecting block 501 and the screw rod 11, which is convenient for rotating the connecting block 501 and the screw rod 11 and saves effort.

[0040] Although the present disclosure has been described only with respect to a limited number of embodiments, those skilled in the art who benefit from the present disclosure will understand that various other embodiments can be designed without departing from the scope of the present invention. Therefore, the scope of the present invention should be limited only by the appended claims.

Claims

1. A structural performance detection device for tunnel construction, comprising a hollow hydraulic cylinder (1); characterized in that: The invention also comprises a fixed block (2), a locking block (3), a clamping block (4), a connecting rod (5), a mounting plate (6), a C-shaped block (7), a supporting plate (8), a supporting rod (9) and a clamping strip (10); the telescopic end of the hollow hydraulic cylinder (1) is connected to two fixed blocks (2); the two fixed blocks (2) are combined in a ring shape; each fixed block (2) is provided with a slide groove (201); each slide groove (201) is slidably connected to a locking block (3); the locking block (3) is in a semicircular ring shape; the two fixed blocks (2) are connected to a plurality of clamping blocks (4); each clamping block (4) is detachably connected to a rubber pad (41); each clamping block (4) is fixedly connected to A sliding block (42) is provided; each fixed block (2) is provided with a second sliding groove (202) on its inner circumferential surface; the sliding block (42) slides along the second sliding groove (202); at least two support rods (9) are provided on the side of the fixed block (2); all the support rods (9) are connected to a support plate (8) in common, and the support rods (9) and the support plate (8) are connected by threads; a connecting rod (5) is passed through the support plate (8), and the connecting rod (5) is located directly above the center of the fixed block (2); a mounting plate (6) is fixedly connected to the bottom of the connecting rod (5); a C-shaped block (7) for pulling out the fixed block (2) is slidably connected to each of the two ends of the mounting plate (6); and a clamping strip (10) is inserted into the top of the connecting rod (5).

2. A structural performance detection device for tunnel construction according to claim 1, characterized in that: The vertical distance between the upper surface of the locking block (3) and the bottom surface of the first slide groove (201) is 5 mm.

3. A structural performance detection device for tunnel construction according to claim 1, characterized in that: The end edge of the locking block (3) along the sliding direction of the sliding groove 1 (201) is chamfered.

4. A structural performance detection device for tunnel construction according to claim 1, characterized in that: The end edge of the sliding block (42) along the sliding direction of the second sliding groove (202) is chamfered.

5. The structural performance detection device for tunnel construction according to claim 1, characterized in that: The surface of the C-shaped block (7) is a rough surface.

6. A structural performance detection device for tunnel construction according to claim 1, characterized in that: The bottom surface of the support rod (9) is a rough surface.

7. A structural performance detection device for tunnel construction according to claim 6, characterized in that: A gripping portion is provided on the top of the support rod (9).

8. A structural performance detection device for tunnel construction according to claim 1, characterized in that: It also includes a screw rod (11) and a pressing plate (12); the screw rod (11) is internally threadedly connected to the connecting rod (5), and the bottom of the screw rod (11) passes through the connecting rod (5) and the mounting plate (6); the top of the screw rod (11) is fixedly connected to a connecting block (501); the clamping strip (10) is plugged into the connecting block (501); and the bottom of the screw rod (11) is fixedly connected to the pressing plate (12).

9. A structural performance detection device for tunnel construction according to claim 1 or 8, characterized in that: Both ends of the clamping strip (10) are arc-shaped.

10. A structural performance detection device for tunnel construction according to claim 8, characterized in that: A rubber layer is provided on the bottom surface of the pressing sheet (12).

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