Fixing device of tunnel secondary lining pressure box

Abstract

The utility model relates to a tunnel secondary lining pressure box fixing device which comprises a fixing tray, fitting adjusting mechanisms, a fixing buckle and a fixing supporting rod, the upper end of the fixing tray is used for containing a pressure box, the fitting adjusting mechanisms are arranged on the two sides of the lower end of the fixing tray respectively, one end of each fitting adjusting mechanism is connected with the lower end of the fixing tray, and the other end of each fitting adjusting mechanism is connected with the fixing supporting rod. One end of the attachment adjusting mechanism is detachably connected with the pressure box and used for adjusting the contact angle of the pressure box and the primary support, the other end of the attachment adjusting mechanism is detachably provided with a fixed supporting rod, the two fixed supporting rods are connected with a secondary lining outer layer main reinforcement through fixing buckles, and the device is easy and convenient to install, high in adjustability, good in attachment degree and high in precision of primary support-secondary lining contact pressure measurement.

Description

Technical Field

[0001] The utility model relates to a fixing device, in particular to a fixing device for a tunnel secondary lining pressure box, and belongs to the field of tunnel support structure monitoring. Background Art

[0002] In tunnels with composite linings, in order to evaluate the effectiveness of the support structure, understand the interaction between the surrounding rock and the support structure, and provide key monitoring data, the secondary lining needs to measure the surrounding rock pressure and install a pressure box at an appropriate location. Generally, the pressure box is installed on the outer steel bars of the secondary lining after the outer steel mesh of the secondary lining is completed. The tool for fixing the pressure box is processed and manufactured at the construction site.

[0003] The traditional installation method generally includes the hanging cloth method, which involves tying the hanging cloth to the outer steel bars of the secondary lining and placing the pressure box in a cloth bag. When pouring concrete, the hanging cloth will be subjected to the thrust of the flowing concrete and come into contact with the soil of the trench wall. This method is inconvenient to operate and cannot ensure sufficient contact between the pressure box and the initial support.

[0004] Patent CN207567743U discloses a soil pressure box fixing device, including a connecting rod, a fastening device, a universal joint, a self-tightening sleeve, and a soil pressure box fixing claw; the fastening device is connected to one end of the connecting rod, and the other end of the connecting rod is fixed with a soil pressure box fixing claw for clamping the soil pressure box, and a universal joint for adjusting the contact angle between the soil pressure box fixing claw and the fastening device is provided on the connecting rod between the soil pressure box fixing claw and the fastening device; one section of the connecting rod between the soil pressure box fixing claw and the universal joint is a self-tightening sleeve structure that can adjust the tightness of the contact surface between the soil pressure box and the object to be measured. The device has high precision The initial stress value is determined, and the installation of the device is simple and easy to operate. However, the device only has one support rod to support the pressure box, and then the contact angle between the pressure box and the object to be measured is adjusted through the universal joint. One support rod can only adjust the center angle of the pressure box to be most closely matched with the center of the object to be measured, but generally the objects to be measured are not all planar structures. The device can only fit the center of the object to be measured, and the fit is not high, which affects the monitoring accuracy. In addition, the universal joint is set at the lower end of the support rod used to support the pressure box, which requires manual operation, high labor intensity, complicated operation, and poor stability after the universal joint is adjusted.

[0005] Therefore, developing a fixing device for the tunnel secondary lining pressure box that can overcome the above defects has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a fixing device for a tunnel secondary lining pressure box, which has the advantages of easy installation, high adjustability, good fit, and high accuracy in measuring the primary support-secondary lining contact pressure.

[0007] In order to solve the above technical problems, the utility model provides a fixing device for a tunnel secondary lining pressure box, including a fixed tray, a fitting adjustment mechanism, a fixing buckle and a fixed support rod. The upper end of the fixed tray is used to place the pressure box, and fitting adjustment mechanisms are respectively provided on both sides of the lower end of the fixed tray. One end of the fitting adjustment mechanism is connected to the lower end of the fixed tray for adjusting the contact angle between the pressure box and the initial support. A fixed support rod is detachably provided on the other end of the fitting adjustment mechanism. The two fixed support rods are connected to the outer main reinforcement of the secondary lining through the fixing buckle.

[0008] The technical solution further defined in the utility model is:

[0009] Furthermore, in the fixing device of the aforementioned tunnel second lining pressure box, the fitting adjustment mechanism includes a fixing block and an adjusting seat, one end of the fixing block is fixedly connected to the bottom of the fixing tray, and the other end of the fixing block is movably arranged in the adjusting seat, and a socket is recessed on the side of the adjusting seat away from the fixing block, a fixed support rod is arranged in the socket, and a threaded through hole is provided on one side of the adjusting seat, and a fastening bolt is provided in the through hole for fixing the fixed support rod in the through hole.

[0010] Technical effect: At present, the general fixed support rods are welded on the fixed tray. For the initial support that is not a regular plane, the tray cannot make the pressure box fit the initial support better if it is not rotated when the pressure box is fitted, and the height of the fixed support rods on both sides is consistent and the distance of the force applied is also consistent, resulting in a better fit, and it is also inconvenient to fix it with the outer main reinforcement. The fixed support rod of the utility model is not directly welded to the bottom of the fixed tray, and the fitting adjustment mechanism is connected to the fixed tray at the same time. The adjustment seat in the fitting adjustment mechanism can be topped by the fixed support rod, and the topping force can adjust the angle of the fixed tray through the fixed block movably set on the adjustment seat, so that the surface of the pressure box is better fitted with the initial support under the structure of the initial support, and at the same time it is fixed to the outer main reinforcement through the fixed buckle, stably fitting the initial support to ensure the accuracy of monitoring.

[0011] In the aforementioned fixing device for the tunnel secondary lining pressure box, a handle is provided at one end of the fastening bolt located outside the through hole.

[0012] The technical effect is that a handle is provided to facilitate the tightening of the bolts, and the use is convenient, labor-saving and easy to operate.

[0013] In the fixing device of the aforementioned tunnel second lining pressure box, the fixing block is movably arranged in the adjusting seat by bolts, and through holes are respectively provided at corresponding positions of the fixing block and the adjusting seat. One end of the fixing block is fixedly connected to the bottom of the fixed tray, and the other end of the fixing block is connected to the adjusting seat through the through hole and bolts and is adjusted and tightened by nuts.

[0014] In the aforementioned fixing device of the tunnel secondary lining pressure box, the fixing tray includes a fixing chassis and fixing claws, four fixing claws are evenly distributed vertically along the circumference of the fixing chassis, and the pressure box is arranged in the fixing claws.

[0015] Technical effect: The utility model fixes the pressure box by simple fixing claws, which better maintains the stability of the pressure box, and four fixing claws replace an entire fixing ring, which reduces materials, reduces costs, and is simple to manufacture.

[0016] In the fixing device of the secondary lining pressure box of the aforementioned tunnel, the fixing clip is formed by two clips of the same structure rotated to ninety degrees relative to each other and then connected, one of the clips is set on the fixed support rod, and the other clip is connected and fixed to the outer main reinforcement of the secondary lining.

[0017] Technical effect: The fixing buckle of the utility model is formed by two buckles rotated to ninety degrees relative to each other and then connected. One buckle is convenient for fastening to the vertically arranged fixed support rod, and the other buckle is convenient for fastening to the outer main reinforcement of the secondary lining, which meets the actual situation. While ensuring the advance of fastening, it is convenient to adjust the entire fixing device according to the angle and distance during testing to achieve the best fit, ensure the accuracy of the measurement, and avoid the possibility that a single buckle may not adapt to the actual fastening position, which is not conducive to the inconvenience caused by fastening.

[0018] In the fixing device of the secondary lining pressure box of the aforementioned tunnel, the fixed support rods and fixing claws are all steel bars.

[0019] The beneficial effects of the utility model are:

[0020] The utility model is provided with a fitting adjustment mechanism and a fixed support rod on both sides of the lower end of the fixed tray respectively. The fitting adjustment mechanism can move in the vertical direction under the action of the fixed support rod, and the fixed block rotates in the plane. At the same time, the two force points are convenient for applying force on both sides according to the structure of the initial support when the initial support is fitted, so that the pressure box is better fitted to the initial support, with high fitting degree and good accuracy.

[0021] The utility model has a reserved insertion hole at the lower end of the fitting adjustment mechanism, and the fixed support rod is inserted into the reserved insertion hole and fixedly connected by fastening bolts. It is easy to install and disassemble, and the fixed support rod of appropriate length can be adjusted and replaced according to the distance from the initial support to the outer steel mesh of the secondary lining and the thickness of the secondary lining. It has strong applicability, and the fixed support rod inserted into the insertion hole will top up the fixed tray, so that the angle of the pressure box and the initial support can be adjusted to fit better.

[0022] The fixed block in the fitting adjustment mechanism of the utility model is movably arranged in the adjustment seat. If the existing universal joint is too flexible, the fixed support rod at the lower end cannot support the fixed tray well, and it will shake and tilt and cannot achieve fitting with the initial support. The utility model adopts bolts and nuts, and the nuts can be adjusted by themselves to clamp the fixed block and the adjustment seat so that they will not be too loose. The fixed support rod at the lower end needs to be pressed with a certain force to change the movement of the fixed block on the adjustment seat. It is adjusted according to the weight of the pressure box and the fixed tray to ensure that the pressure box at the upper end can be supported and will not shake. At the same time, the nut can be further tightened after the angle is fixed. The angle positioning is accurate, the impact caused by pouring to change the angle is avoided, and the monitoring accuracy is improved.

[0023] The fixing buckle of the utility model is easy to install and disassemble and has strong applicability. The position can be adjusted according to the distance of the initial support to fix the fixed support rod on the outer steel bar. The buckle fastening method replaces the current welding fixing method, which is easier to operate and reduces labor intensity.

[0024] The utility model is a new type of fixing device which is easy to install, safe, efficient and has reliable installation quality.

[0025] The utility model not only ensures full contact between the pressure box and the initial support and measures the stress value with high precision, but also can be installed quickly and conveniently with high efficiency and firm and reliable connection. The installation position can also be flexibly adjusted according to the distance between the outer steel mesh of the secondary lining and the initial support. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the fixing device of the tunnel secondary lining pressure box according to the embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the use status of the fixing device of the tunnel secondary lining pressure box according to the embodiment of the utility model;

[0028] Figure 3 This is a structural schematic diagram of the fitting adjustment mechanism in the fixing device of the tunnel secondary lining pressure box according to the embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of a fixing buckle in a fixing device for a tunnel secondary lining pressure box according to an embodiment of the utility model;

[0030] Figure 5 This is a schematic diagram of the structure of a fixed tray in a fixing device for a tunnel secondary lining pressure box according to an embodiment of the utility model;

[0031] In the figure: 1-fixed tray, 11-fixed chassis, 12-fixed claw, 2-fitting adjustment mechanism, 21-fixed block, 22-adjusting seat, 23-fastening bolt, 24-handle, 25-bolt, 26-nut, 3-fixed buckle, 31-buckle, 4-fixed support rod, 5-pressure box. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them; the technical features involved in the various implementation methods of the utility model described below can be combined with each other as long as they do not conflict with each other. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention. Example 1

[0034] The present embodiment provides a fixing device for a tunnel secondary lining pressure box, which can be applied to the monitoring of the primary support-secondary lining contact pressure of a composite lining tunnel. Figure 1-2 As shown, it includes a fixed tray 1, a fitting adjustment mechanism 2, a fixed buckle 3 and a fixed support rod 4, the fixed support rod 4 is a steel bar, the upper end of the fixed tray 1 is used to place a pressure box 5, and the two sides of the lower end of the fixed tray 1 are respectively provided with a fitting adjustment mechanism 2, one end of the fitting adjustment mechanism 2 is connected to the lower end of the fixed tray 1, and is used to adjust the contact angle between the pressure box 5 and the initial support, and the other end of the fitting adjustment mechanism 2 is detachably provided with a fixed support rod 4, and the two fixed support rods 4 are connected to the outer main reinforcement of the secondary lining through the fixed buckle 3;

[0035] like Figure 3As shown, the fitting adjustment mechanism 2 includes a fixed block 21 and an adjustment seat 22. One end of the fixed block 21 is welded and fixed to the bottom of the fixed tray 1, and the other end of the fixed block 21 is movably arranged in the adjustment seat 22 by bolts. Through holes are respectively arranged at corresponding positions of the fixed block 21 and the adjustment seat 22. The fixed block is connected to the adjustment seat 22 through the through holes and bolts 25 and is adjusted and tightened by nuts 26. The bottom of the fixed block 21 does not contact the inside of the adjustment seat 22, which is convenient for the rotation of the fixed block 21. The two sides of the fixed block 21 are in contact with the adjustment seat 22. If the two sides of the fixed block 21 are in contact with the adjustment seat The distance between the two is too large, and it is difficult to fix the two by tightening the bolts 25. The two sides of the fixing block 21 are in contact with the adjusting seat 22, which is convenient for adjusting and tightening the fixing block 21 and the adjusting seat 22, so that the fixed tray 1 is stably supported and the angle is positioned. A socket is concavely provided on the side of the adjusting seat 22 away from the fixing block 21, and a fixed support rod 4 is provided in the socket. A threaded through hole is provided on one side of the adjusting seat 22, and a fastening bolt 23 is provided in the through hole for fixing the fixed support rod 4 in the through hole. A handle 24 is provided at one end of the fastening bolt 23 outside the through hole.

[0036] like Figure 5 As shown, the fixed tray 1 includes a fixed chassis 11 and a fixed claw 12. The fixed claw is a steel bar, and the top of the fixed claw is rounded to prevent the edges of the plane structure from damaging the pressure box when it contacts the pressure box. Four fixed claws 12 are evenly distributed vertically along the circumference of the fixed chassis 11. A pressure box 5 is arranged in the fixed claw 12. The sizes of the fixed chassis 11 and the fixed claw 12 are made according to the pressure box. The pressure box is just placed in the fixed claw, and the four fixed claws are in contact with the pressure box on all sides.

[0037] like Figure 4 As shown, the fixing clip 3 is formed by two clips 31 of the same structure rotated to ninety degrees relative to each other and then welded, and can be flexibly adjusted to the position of the fixed support rod reinforcement. One of the clips 31 is set on the fixed support rod 4, and the other clip 31 is connected and fixed to the outer main reinforcement of the secondary lining.

[0038] When implementing it, Figure 2As shown, during installation, first select a steel bar of appropriate length as the fixed support rod 4 according to the thickness of the secondary lining. The length of the steel bar shall not exceed the thickness of the secondary lining but shall be greater than the distance from the initial support to the outer steel mesh of the secondary lining. Insert the fixed steel bar into the reserved socket of the adjustment seat 22 in the fitting adjustment mechanism 2, and then put the fixing buckle 3 on the steel bar of the fixed support rod 4. Adjust the tightness of the bolts and nuts on the fitting adjustment mechanism 2 according to the weight of the pressure box 5 and the needs. Under the premise of ensuring the movable connection, ensure that the fixed support rod 4 does not shake when supporting the fixed tray 1, and provide good support. Forcefully push the fixed support rod 4 upward to move the fixed tray 1 so that the upper surface of the pressure box 5 fits with the initial support. At this time, the bolts and nuts on the fitting adjustment mechanism 2 can be tightened as needed to fix the fitting angle. Because the casting is from bottom to top, it can also be not tightened when it does not hinder the angle. Finally, adjust the fixing buckle 3 and tighten the bolts on the fixing buckle 3 to fix it on the outer steel bar of the secondary lining.

[0039] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A fixing device for a tunnel secondary lining pressure box, characterized in that: The invention comprises a fixed tray (1), a fitting adjustment mechanism (2), a fixing buckle (3) and a fixing support rod (4), wherein the upper end of the fixed tray (1) is used to place a pressure box (5), and the fitting adjustment mechanism (2) is respectively provided on both sides of the lower end of the fixed tray (1), one end of the fitting adjustment mechanism (2) is connected to the lower end of the fixed tray (1) and is used to adjust the contact angle between the pressure box (5) and the initial support, and the other end of the fitting adjustment mechanism (2) is detachably provided with the fixing support rod (4), and the two fixing support rods (4) are connected to the outer main reinforcement of the secondary lining through the fixing buckle (3).

2. The fixing device for the tunnel secondary lining pressure box according to claim 1 is characterized in that: The fitting adjustment mechanism (2) comprises a fixing block (21) and an adjustment seat (22), one end of the fixing block (21) is fixedly connected to the bottom of the fixing tray (1), the other end of the fixing block (21) is movably arranged in the adjustment seat (22), a socket is concavely arranged on a side of the adjustment seat (22) away from the fixing block (21), the fixing support rod (4) is arranged in the socket, and a threaded through hole is arranged on one side of the adjustment seat (22), a fastening bolt (23) is arranged in the through hole for fixing the fixing support rod (4) in the through hole.

3. The fixing device for the tunnel secondary lining pressure box according to claim 2 is characterized in that: A handle (24) is provided at one end of the fastening bolt (23) located outside the through hole.

4. The fixing device for the tunnel secondary lining pressure box according to claim 2 is characterized in that: The fixing block (21) is movably arranged in the adjustment seat (22) by means of bolts (25); corresponding positions of the fixing block (21) and the adjustment seat (22) are respectively provided with through holes; one end of the fixing block (21) is fixedly connected to the bottom of the fixed tray (1); the other end of the fixing block is connected to the adjustment seat (22) by means of the through hole and the bolts (25) and is adjusted and tightened by means of nuts (26).

5. The fixing device for the tunnel secondary lining pressure box according to claim 1 is characterized in that: The fixed tray (1) comprises a fixed base (11) and fixed claws (12); four fixed claws (12) are evenly distributed vertically on the fixed base (11) along the circumferential direction thereof; and the pressure box (5) is arranged inside the fixed claws (12).

6. The fixing device for the tunnel secondary lining pressure box according to claim 1, characterized in that: The fixing buckle (3) is formed by connecting two buckles (31) with the same structure after being rotated to a relative angle of 90 degrees, wherein one buckle (31) is arranged on the fixing support rod (4) and the other buckle (31) is connected and fixed to the outer main reinforcement of the secondary lining.

7. The fixing device for the tunnel secondary lining pressure box according to claim 1 or 5, characterized in that: The fixed support rod (4) and the fixed claw (12) are both steel bars.

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