A structural performance detection device for tunnel construction

Abstract

The present invention relates to the field of engineering testing, and particularly to a structural performance detection device for tunnel construction, including a hollow hydraulic cylinder, a fixing block, a locking block, etc.; the telescopic end of the hollow hydraulic cylinder is connected with two fixing blocks; each fixing block is provided with a first chute; a locking block is slidably connected in each first chute. When the anchor ring of the present invention is installed, the two fixing blocks are combined across the steel bar, and the steel bar is located between all the clamping blocks. There is no need to sleeved the anchor ring onto the steel bar from top to bottom, avoiding the existing anchor ring from slipping during installation, colliding with the steel bar and wearing, affecting the fixing effect of the anchor ring and shortening 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. 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.

Description

Technical Field

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

[0002] Tunnel reinforcement implantation 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 fixation in tunnel projects. After the steel bars are implanted in place, a pull-out test is required to detect whether the structural strength of the connection between the steel bars and the concrete reaches the estimate. When conducting a pull-out test with a pull-out tester, first, a hollow hydraulic cylinder is sleeved on the steel bar, the hydraulic cylinder is moved downward and placed on the ground, 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 to the steel bar. Then, 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 knocked 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 to 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, the manual operation of the anchor ring is inevitably knocked against the steel bar, which is likely to cause wear to the anchor ring, shorten the service life of the anchor ring, affect the fit between the anchor ring and the wedge block, resulting in unstable fixation of the anchor ring to the steel bar to be tested, and affect 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 fixed 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 fixed blocks; the two fixed blocks are combined into a ring shape; each fixed block is provided with a chute one; a locking block is slidably connected in each chute one; the locking block is in a semi-circular ring shape; a plurality of wedge blocks are commonly connected to the two fixed blocks; a rubber pad is detachably connected to each wedge block; a sliding block is fixedly connected to each wedge block; a chute two is provided on the inner circumferential surface of each fixed block; the sliding block slides along the chute two; at least two support rods are arranged beside the fixed block; all the support rods are commonly 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 fixed block; the bottom of the connecting rod is fixedly connected with a mounting plate; a C-shaped block for pulling out the fixed block is slidably connected to each end of the mounting plate; a clamping strip is inserted into 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 sliding groove is 5 mm.

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

[0007] As a preferred technical solution of the present invention, the end edge of the sliding block along the second sliding direction of the sliding groove is chamfered.

[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 gripping portion is provided at the top of the support rod.

[0011] As a preferred technical solution of the present invention, it also includes a screw and a pressing plate; the screw is connected to the inner thread of the connecting rod, and the bottom of the screw passes through the connecting rod and the mounting plate; the top of the screw is fixedly connected to a connecting block; the clamping strip is plugged into the connecting block; and the bottom of the screw is fixedly connected to a pressing plate.

[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 pressed sheet.

[0014] The present invention has the following advantages: the present invention realizes that when the anchor ring of the present invention is installed, the two fixing blocks are merged with the steel bar in between, and the steel bar is located between all the clamping blocks and surrounded by three clamping blocks, and there is no need to put the anchor ring on the steel bar from top to bottom, so as to avoid the existing anchor ring from colliding with the steel bar and being worn during the downward movement during installation, which affects the fixing effect of the anchor ring and shortens the service life. When disassembling, the anchor ring of the present invention can be disassembled by simply rotating the locking block to unlock the fixing block, and there is no need to install and disassemble the anchor ring parts one by one along the steel bar, thereby speeding up the installation and disassembly efficiency of the anchor ring. In addition, unlike the existing anchor ring that is reinforced and stuck by hammering or the like, which also requires hammering or other external force to remove the fastened anchor ring when disassembling, the anchor ring structure of the present invention will not cause wear of the anchor ring during disassembly and installation.

[0015] An anchor ring formed by a fixing block, a locking block and a clamping block is fixed on an exposed steel bar; an extension frame composed of a connecting rod, a mounting plate, a C-shaped block, a supporting plate, a supporting rod and a clamping strip is connected to the anchor ring; a hollow hydraulic cylinder is located on the extension frame; the anchor ring is pulled by the extension frame to perform a pull-out test, thereby realizing a pull-out test on short steel bars without threaded connection holes. Compared with the existing test using a threaded extension rod, the present invention has a wide range of applications and high practicality. 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;

[0017] 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;

[0018] 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;

[0019] 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;

[0020] 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;

[0021] 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;

[0022] 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;

[0023] 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.

[0024] Among them: 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 manners

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.

[0026] Embodiment 1

[0027] 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;

[0028] 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 chute 201 is provided on the outer circumferential surface of each fixing block 2; a locking block 3 is slidably connected in each 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 chute 202 is provided on the inner circumferential surface of each fixing block 2; the sliding block 42 slides along the 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 is arranged 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.

[0029] The vertical distance between the upper surface of the locking block 3 and the bottom surface of the chute 201 is 5 mm, which is conducive to the sliding of the locking block 3 in the chute 201.

[0030] A chamfer is provided at the end edge of the locking block 3 along the sliding direction of the chute 201, which is conducive to the locking block 3 sliding into the chute 201 of another fixing block 2.

[0031] A chamfer is provided at the end edge of the sliding block 42 along the sliding direction of the chute 202, which is conducive to the sliding block 42 sliding into the chute 202.

[0032] The surface of the C-shaped block 7 is a rough surface, which increases the friction force with the bottom surface of the fixing block 2 and prevents sliding misalignment with the fixing block 2 when a pulling force is applied.

[0033] 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 pull-out test.

[0034] A holding part is provided 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.

[0035] The usage steps of the structural performance detection device for tunnel construction of the present invention are as follows:

[0036] 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, the cross-sections of the fixed block 2 and the locking block 3 are flush. When performing a pulling test on a long exposed steel bar, first slide the two clamping blocks 4 onto one 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 with the steel bar in between. 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, 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 locked 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 bumps and abrasions between the anchor ring and the steel bar during 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, only need to rotate the locking block 3 to stop locking to the fixed block 2, then the anchor ring of the present invention can be disassembled, without installing and disassembling each anchor ring part along the steel bar one by one, which speeds up the installation and disassembly efficiency of the anchor ring. And when disassembling the anchor ring, different from the existing anchor ring which needs to be hammered and other external forces to remove the tightened anchor ring after being reinforced and locked by hammering and other methods, the anchor ring structure of the present invention will not cause wear to the anchor ring during 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, because the rubber pads 41 have the ability to adapt to deformation, the anchor ring structure of the present invention can be adapted to tensile tests on steel bars of different sizes, with high practicability.

[0037] 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 anchor ring composed of the fixed block 2, the locking block 3, and the clamping block 4 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 subject 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 out and cannot be used, it can be quickly replaced, and the cost of the rubber pad 41 itself is low, reducing the overall cost of the pull-out test.

[0038] When 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:

[0039] 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, with the top of the steel bar protruding from 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, 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, zero the pressure recorded by the manual pump, and 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, and the C-shaped block 7 pulls the anchor ring. 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 of the short steel bar without a threaded connection hole.

[0040] Further, there will be a situation where the arrangement of adjacent steel bars is dense. 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 prevent the support rod 9 from 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 dense, select a suitable installation angle according to the gap between adjacent steel bars so that the positional 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.

[0041] 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 dense ones, 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.

[0042] According to the above steps, we can know that the present invention has the following effects:

[0043] 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 which is fixed by means such as hammering and is also removed by external forces such as hammering during disassembly, the anchor ring structure of the present invention will not cause wear to the anchor ring during disassembly and installation.

[0044] 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. Pull the anchor ring through the extension frame for a pull-out test, so as to realize the pull-out test on 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.

[0045] The additional technical effects of the present invention are as follows:

[0046] 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 conducive to the sliding of the locking block 3 in the first chute 201.

[0047] 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 conducive 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 conducive to the sliding block 42 sliding into the second chute 202.

[0048] Embodiment 2

[0049] 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 plate 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 plate 12 is fixedly connected to the bottom of the screw rod 11.

[0050] Both ends of the clamping strip 10 are arc-shaped, which is conducive to inserting into the connecting block 501.

[0051] A rubber layer is provided on the bottom surface of the pressing plate 12 to increase the friction with the top of the steel bar.

[0052] When using the present invention to conduct a pull - out test on the planted steel bars in a tunnel, the following problems will also be encountered:

[0053] 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 extended 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 for 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 extended frame is connected to the anchor ring, at this time, the extended frame is movably connected to the anchor ring. It is necessary for someone to hold the extended frame and then install the hollow hydraulic cylinder 1. Under the single - person operation, the extended frame and the anchor ring are prone to deviation or even detachment, affecting the pull - out test results. Furthermore, a screw rod 11 is connected to the connecting rod 5 by internal threads. 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 extended 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 and holds the clamping strip 10 to drive 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 extended 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 extended 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 a pull - out test. Since the extended 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 during the pull - out test on the side - wall steel bars, preventing the anchor ring and the extended frame from deviating or even detaching, which affects the pull - out test results.

[0054] The present invention also has the following additional effects:

[0055] 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, facilitating the rotation of the connecting block 501 and the screw rod 11 and saving effort.

[0056] Although the present disclosure has been described with respect to only 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: It further includes fixing blocks (2), locking blocks (3), clamping blocks (4), connecting rods (5), mounting plates (6), C-shaped blocks (7), support plates (8), support rods (9) and clamping strips (10); two fixing blocks (2) are combined into a ring shape; each fixing block (2) is provided with a first chute (201); a locking block (3) is slidably connected in each first chute (201); the locking block (3) is in a semi-circular ring shape; several clamping blocks (4) are commonly connected to the two fixing blocks (2); a rubber pad (41) is detachably connected to each clamping block (4); a sliding block (42) is fixedly connected to each clamping block (4); a second chute (202) is provided on the inner circumferential surface of each fixing block (2); the sliding block (42) slides along the second chute (202); at least two support rods (9) are arranged beside the fixing block (2); all the support rods (9) are commonly connected to a support plate (8), and the support rods (9) are threadedly connected to the support plate (8); a connecting rod (5) is passed 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 to a mounting plate (6); a C-shaped block (7) for pulling out the fixing block (2) 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); The surface of the C-shaped block (7) is a rough surface; The bottom surface of the support rod (9) is a rough surface; It further includes a screw rod (11) and a pressing piece (12); the connecting rod (5) is internally threadedly connected 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); A rubber layer is provided on the bottom surface of the pressing piece (12).

2. The structural performance detection device for tunnel construction according to claim 1, wherein: A chamfer is provided at the end edge of the locking block (3) along the sliding direction of the first chute (201).

3. A structural performance detection device for tunnel construction according to claim 1, characterized in that: A chamfer is provided at the end edge of the sliding block (42) along the sliding direction of the second chute (202).

4. A structural performance detection device for tunnel construction according to claim 1, characterized in that: A holding part is provided at the top of the support rod (9).

5. The structural performance detection device for tunnel construction according to claim 1, wherein: Both ends of the clamping strip (10) are arc-shaped.

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