Tunnel lining anti-fracturing device

Abstract

The utility model belongs to the technical field of tunnel construction, and aims to solve the problems that the efficiency is low and misjudgment is easily caused because whether a lining trolley template is overlapped in place or not is judged mainly by manual naked eye recognition at present. The tunnel lining anti-fracturing device comprises a control box, a lap joint plate, a pressure sensor and a distance sensor. The lap joint plate is fixedly laid on the side wall of the circumference of the lining trolley, multiple sets of brackets are arranged on an arc web of the lap joint plate at intervals, the brackets extend outwards in the direction away from the lap joint plate, pressure sensors and distance sensors are arranged at the upper ends of the brackets, and the detection ends of the pressure sensors are flush with the top face of a lining trolley formwork at the corresponding positions. And the pressure sensor is used for detecting pressure data between the top surface of the lining trolley template and the poured and formed lining surface. The device can feed back the distance and contact pressure data between the top surface of the lining trolley template and the lining surface in real time, provides a basis for lap joint positioning of the trolley, and prevents the lining from being jacked and cracked.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of tunnel construction, and particularly relates to a tunnel lining anti-fracture device. BACKGROUND

[0002] In tunnel construction, the tunnel lining is usually constructed by adopting the integral steel formwork trolley pump concrete technology. When the adjacent two plate linings are constructed, the trolley formwork needs to be overlapped with the concrete of the previous plate lining by more than 10 cm.

[0003] At present, whether the lining trolley formwork is overlapped in place is mainly identified by manual naked eye, which is not only low in efficiency but also easy to cause misjudgment, and common diseases such as concrete cracking and local block falling of the tunnel lining ring construction joint overlap position due to excessive formwork jacking pressure in the previous stage of lining, which brings great safety risks to the later operation maintenance and defect treatment, and easily causes the deformation of the trolley, reduces the service life of the trolley, and makes the project pay high quality control cost. UTILITY MODEL CONTENTS

[0004] The utility model provides a tunnel lining anti-fracture device to solve at least one of the above technical problems in the prior art.

[0005] The utility model adopts the following technical scheme: a tunnel lining anti-fracture device, including a control box, an overlap plate, a pressure sensor and a distance sensor, the overlap plate is fixedly laid at the side wall of the circumference of the lining trolley, a plurality of groups of brackets are arranged on the arc web of the overlap plate in an interval, the bracket is arranged to extend outward in the direction away from the overlap plate, and the upper end of the bracket is provided with the pressure sensor and the distance sensor, the detection end of the pressure sensor is flush with the top surface of the lining trolley formwork at the corresponding position, the pressure sensor and the distance sensor are electrically connected with the control box, the pressure sensor is used for detecting the pressure data between the top surface of the lining trolley formwork and the lining surface that has been poured and formed, and the control box is provided with an indicating lamp for indicating the pressure between the top surface of the lining trolley formwork and the lining surface that has been poured and formed.

[0006] Preferably, the overlap plate comprises an arc web, an upper wing plate and a reinforcing rib, wherein the arc web is arranged on the side wall of the circumference of the lining trolley and is fixed by bolts, the upper wing plate is located at the upper end of the arc web and is away from one side of the side wall of the circumference of the lining trolley, and the reinforcing rib is connected between the arc web and the upper wing plate.

[0007] Preferably, the upper end of the upper wing plate is provided with a groove, and a rubber gasket is fixedly arranged in the groove, and the top surface of the rubber gasket is flush with the detection end of the pressure sensor.

[0008] Preferably, the plurality of groups of brackets on the overlap plate are evenly arranged within the 120-degree range of the arch part of the lining trolley.

[0009] Preferably, the indicator lights on the control box include a no-contact indicator light, a normal pressure indicator light, and an overpressure indicator light. When the pressure sensor detects a pressure of 0, the controller in the control box controls the no-contact indicator light to illuminate green, indicating that the lining trolley has not been lifted into position. When the pressure sensor detects a pressure of 0.1-0.3 MPa, the controller in the control box controls the normal pressure indicator light to illuminate yellow, indicating that the lining trolley has been lifted into position. When the pressure sensor detects a pressure greater than 0.3 MPa, the controller in the control box controls the overpressure indicator light to illuminate red, indicating overpressure during lifting, and the controller controls the lifting hydraulic cylinder to retract.

[0010] Preferably, the control box is equipped with a controller, a display screen, a data transmission interface, and a printer. The display screen is used to display the pressure information detected by the pressure sensor and the distance information detected by the distance sensor. The data transmission interface is used to connect the signal lines of the pressure sensor and the distance sensor. The display screen, the data transmission interface, and the printer are all connected to the controller.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This device can provide real-time feedback on the distance and contact pressure data between the top surface of the lining trolley template and the lining surface, providing a basis for precise trolley overlap and positioning, and realizing intelligent alarm to prevent the lining from being cracked. It can change the shortcomings of the past operation where operators relied solely on experience and visual observation for positioning, transforming "blind operation" into "visual operation" and effectively ensuring the quality of lining construction.

[0013] During the lining pouring process, by monitoring the pressure data of various parts of the trolley panel in real time, it is possible to avoid excessive pressure or eccentric pressure on the trolley caused by excessive concrete pouring speed, and to prevent trolley deformation caused by excessive structural stress. This enables the digitization and intelligentization of the lining trolley overlapping process, avoids the generation of closed-loop cracks in the lining arch, and ensures construction quality. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure installation of this embodiment;

[0016] Figure 2 This is a schematic diagram of the connection structure at the overlapping plate in this embodiment;

[0017] Figure 3 This is a schematic diagram (top view) of the pressure sensor in this embodiment;

[0018] Figure 4 This is a schematic diagram (front view) of the pressure sensor in this embodiment;

[0019] Figure 5 This is a schematic diagram (top view) of the distance sensor in this embodiment;

[0020] Figure 6 This is a schematic diagram (front view) of the distance sensor in this embodiment;

[0021] Figure 7 This is a schematic diagram of the external structure of the control box in this embodiment.

[0022] In the diagram: 1-Control box; 2-Overlap plate; 201-Arched web; 202-Upper wing plate; 203-Reinforcing rib; 204-Rubber gasket; 3-Pressure sensor; 4-Distance sensor; 5-Bracket; 601-Not in contact indicator light; 602-Normal pressure indicator light; 603-Overpressure indicator light; 604-Display screen; 605-Data transmission interface; 606-Printer; 607-Main switch; 608-Liner trolley template; 609-Tunnel lining face. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should fall within the scope of the technical content disclosed in this utility model. It should be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0025] This utility model provides an embodiment:

[0026] like Figures 1 to 7As shown, a tunnel lining anti-cracking device includes a control box 1, an overlap plate 2, a pressure sensor 3, and a distance sensor 4. The overlap plate 2 is fixedly laid on the side wall of the circumference of the lining trolley. Multiple sets of brackets 5 are arranged at intervals along the arc-shaped web 201 of the overlap plate 2. The brackets 5 extend outward in a direction away from the overlap plate 2, and the upper end of the brackets 5 is provided with pressure sensor 3 and distance sensor 4. The detection end of pressure sensor 3 is flush with the top surface of the lining trolley template at the corresponding position. Both pressure sensor 3 and distance sensor 4 are electrically connected to control box 1. Pressure sensor 3 is used to detect the pressure data between the top surface of the lining trolley template and the cast-in-place lining surface. The control box 1 is provided with an indicator light for indicating the pressure between the top surface of the lining trolley template and the cast-in-place lining surface.

[0027] In this embodiment, the overlapping plate 2 is formed by welding 16mm steel plates and includes an arc-shaped web 201, an upper wing plate 202, and reinforcing ribs 203. The arc-shaped web 201 is fitted to the side wall of the lining trolley circumference and fixed by bolts. The upper wing plate 202 is located at the upper end of the arc-shaped web 201 and away from the side wall of the lining trolley circumference. The reinforcing ribs 203 connect the arc-shaped web 201 and the upper wing plate 202. A 20mm groove is formed at the upper end of the upper wing plate 202, and a rubber gasket 204 is fixedly installed in the groove. The top surface of the rubber gasket 204 is flush with the detection end of the pressure sensor. The rubber gasket 204 and the detection end of the pressure sensor 3 need to contact each sensing point on the lining surface.

[0028] Five sets of brackets 5 on the overlap plate 2 are evenly arranged within a 120-degree range along the arch of the lining trolley. The distance sensor 4 is an ultrasonic ranging probe, which is a strip gauge installed on the overlap plate of the lining trolley. The pressure sensor 3 detects whether the top surface of the trolley template is tightly fitted with the cast-in-place lining surface without gaps, avoiding excessive overlap between the trolley template and the cast-in-place lining surface, preventing the trolley template from cracking the cast-in-place lining surface, and avoiding damage, cracks, and spalling of the cast-in-place lining surface, which is beneficial to improving the quality of tunnel concrete forming.

[0029] The indicator lights on control box 1 include a non-contact indicator 601, a normal pressure indicator 602, and an overpressure indicator 603. When the pressure detected by pressure sensor 3 is 0, the controller in control box 1 controls the non-contact indicator 601 to light up green, indicating that the lining trolley has not been lifted into position. When the pressure detected by pressure sensor 3 is 0.1-0.3 MPa, the controller in control box 1 controls the normal pressure indicator 602 to light up yellow, indicating that the lining trolley has been lifted into position and the drive mechanism stops operating. When the pressure detected by pressure sensor 3 is greater than 0.3 MPa, the controller in control box 1 controls the overpressure indicator 603 to light up red, indicating overpressure during lifting. The controller then controls the lifting hydraulic cylinder to retract to prevent excessive pressure from causing cracks.

[0030] The control box 1 is also equipped with a controller, a display screen 604, a data transmission interface 605, a printer 606, and a main switch 607. The display screen 604 shows the pressure information detected by the pressure sensor 3 and the distance information detected by the distance sensor 4. The data transmission interface 605 connects the signal lines of the pressure sensor 3 and the distance sensor 4. The display screen 604, data transmission interface 605, printer 606, and main switch 607 are all connected to the controller. The lining trolley overlap anti-cracking device is linked to the intelligent construction system at the tunnel entrance to collect trolley positioning data and sensing data during the pouring process, which is then stored and archived for future reference in construction.

[0031] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A tunnel lining anti-cracking device, characterized in that: Includes control box (1), overlapping plate (2), pressure sensor (3) and distance sensor (4); The overlapping plate (2) is fixedly laid on the side wall of the circumference of the lining trolley. Multiple sets of brackets (5) are set at intervals along the arc web (201) of the overlapping plate (2). The brackets (5) extend outward in the direction away from the overlapping plate (2). A pressure sensor (3) and a distance sensor (4) are set on the upper end of the bracket (5). The detection end of the pressure sensor (3) is flush with the top surface of the lining trolley template at the corresponding position. The pressure sensor (3) and the distance sensor (4) are electrically connected to the control box (1). The pressure sensor (3) is used to detect the pressure data between the top surface of the lining trolley template and the cast lining surface. An indicator light is set on the control box (1) to indicate the pressure between the top surface of the lining trolley template and the cast lining surface. The overlapping plate (2) includes an arc-shaped web (201), an upper wing plate (202), and a reinforcing rib (203). The arc-shaped web (201) is fitted to the side wall of the lining trolley and fixed by bolts. The upper wing plate (202) is located at the upper end of the arc-shaped web (201) and away from the side wall of the lining trolley. The reinforcing rib (203) is connected between the arc-shaped web (201) and the upper wing plate (202). The upper end of the upper wing plate (202) has a groove, and a rubber gasket (204) is fixedly installed in the groove. The top surface of the rubber gasket (204) is flush with the detection end of the pressure sensor.

2. The tunnel lining anti-cracking device according to claim 1, characterized in that: Multiple sets of brackets (5) on the lap plate (2) are evenly arranged within a 120-degree range along the arch of the lining trolley.

3. The tunnel lining anti-cracking device according to claim 1, characterized in that: The indicator lights on the control box (1) include a non-contact indicator light (601), a normal pressure indicator light (602), and an overpressure indicator light (603). When the pressure detected by the pressure sensor (3) is 0, the controller in the control box (1) controls the non-contact indicator light (601) to light up green, indicating that the lining trolley has not been lifted into position. When the pressure detected by the pressure sensor (3) is 0.1-0.3MPa, the controller in the control box (1) controls the normal pressure indicator light (602) to light up yellow, indicating that the lining trolley has been lifted into position. When the pressure detected by the pressure sensor (3) is greater than 0.3MPa, the controller in the control box (1) controls the overpressure indicator light (603) to light up red, indicating that the lifting is overpressured, and the controller controls the lifting hydraulic cylinder to retract.

4. The tunnel lining anti-cracking device according to claim 3, characterized in that: The control box (1) is equipped with a controller, a display screen (604), a data transmission interface (605), a printer (606), and a main switch (607). The display screen (604) is used to display the pressure information detected by the pressure sensor (3) and the distance information detected by the distance sensor (4). The data transmission interface (605) is used to connect the signal lines of the pressure sensor (3) and the distance sensor (4). The display screen (604), the data transmission interface (605), the printer (606), and the main switch (607) are all connected to the controller.

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