Telescopic multi-leg tunnel arch temporary supporting device

Abstract

A telescopic multi-foot type tunnel arch frame temporary supporting device is characterized by comprising a supporting rod, supporting feet and an arch frame clamp. The supporting rod comprises a threaded rod and a threaded sleeve, and the height of the supporting rod is adjusted by rotating the threaded sleeve; each supporting leg comprises a rotating shaft, a threaded rod and a threaded sleeve and is used for auxiliary supporting; the arch frame clamp comprises a supporting plate, a clamping plate, a connecting bolt, a connecting nut and a self-locking spring. The telescopic supporting leg is simple in structure and convenient to operate, the multiple telescopic supporting legs are adopted, each supporting leg can be independently adjusted in a telescopic mode so as to adapt to different tunnel sections and topographic changes, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of arch support devices, in particular to a retractable multi-legged tunnel arch temporary support device. Background Art

[0002] With the continuous progress and development of tunnel construction technology, traditional tunnel arch support methods have been unable to meet the increasingly complex and changing engineering needs. Especially in the face of tunnel engineering projects with complex geological conditions and difficult construction, these traditional support devices have exposed many problems, such as insufficient safety, low construction efficiency and weak environmental adaptability. These problems not only affect the progress and quality of the project, but may also threaten the safety of construction workers. Utility Model Content

[0003] The utility model aims to solve the problems of poor arch support stability and difficulty in adjustment during tunnel construction in the prior art by means of an adjustable support structure and an arch clamp with a self-locking spring.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a retractable multi-legged tunnel arch temporary support device, characterized in that it includes a support rod, a support foot and an arch clamp; the support rod is used for main support, and the upper end of the support rod is connected to the arch clamp; the support rod includes a threaded rod and a threaded sleeve, and the height of the support rod is adjusted by rotating the threaded sleeve; the support foot includes a rotating shaft, a threaded rod and a threaded sleeve for auxiliary support; the upper end of the support foot is fixed to the middle of the support rod through a rotating shaft, and the opening angle of the support foot is adjusted by the rotating shaft, and the height of the support rod is adjusted by rotating the threaded sleeve. The threaded sleeve adjusts the length of the supporting foot; the arch frame clamp is arranged at the upper end of the supporting rod, and is used to connect the supporting rod with the actual steel arch frame; the arch frame clamp includes a support plate, a clamping plate, connecting bolts, connecting nuts and a self-locking spring; the support plate is welded to the upper end of the supporting frame, and a hole is opened in the middle; there are two clamping plates, and a hole is opened at the bottom, which are located at both ends of the support plate and connected by a self-locking spring; the connecting bolts pass through the holes at the bottom of the clamping plate and the holes of the support plate in turn; the support plate and the clamping plate can adapt to steel arch frames of different sizes and shapes through self-locking springs; the self-locking spring is used to ensure automatic adjustment of the clamping force when bearing load.

[0005] As a retractable multi-legged tunnel arch temporary support device of the utility model, it is characterized in that: the support rod is provided with holes for inserting pins to prevent loosening after height adjustment; the adjustment range of the opening angle of the support legs is 30 degrees to 180 degrees to adapt to different usage requirements.

[0006] As a retractable multi-legged tunnel arch temporary support device of the utility model, it is characterized in that an anti-skid pad is arranged on the inner side of the arch clamp to increase the friction force with the contact surface of the steel arch.

[0007] The utility model provides a retractable multi-legged tunnel arch temporary support device, which has the following beneficial effects:

[0008] The utility model has a simple structure and is easy to operate. It adopts multiple retractable support legs, each of which can be independently retracted and adjusted to adapt to different tunnel sections and terrain changes; it reduces the time for assembly and disassembly and improves construction efficiency; it provides workers with a safe and reliable tunnel frame working space, effectively solves the problem of safety protection difficulties in tunnel construction scenarios caused by various unknown factors such as unstable surrounding rock, and effectively ensures the personal safety of dangerous workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model;

[0010] In the figure: 1. support rod; 2. support foot; 3. arch frame clamp; 301. support plate; 302. clamping plate; 303. connecting bolt; 304. connecting nut; 305. self-locking spring. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the practical embodiment to clearly and completely describe the technical solution in the practical embodiment. Obviously, the described embodiment is only a part of the embodiment of the practical embodiment, not all of the embodiments. Based on the embodiment in the practical embodiment, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this practical embodiment.

[0012] See also Figure 1 The utility model provides a technical solution: a retractable multi-legged tunnel arch temporary support device:

[0013] In this implementation scheme: first prepare threaded rods and threaded sleeves made of carbon steel with suitable diameters. The sizes of the threaded rods and threaded sleeves need to be calculated in advance to ensure that they can withstand the expected load and adapt to the installation height of the tunnel arch. Use a metal saw or cutter to cut, ensure that the cut is straight and accurate in size, and insert the cut threaded rod into the threaded sleeve. Before insertion, lubricant can be applied to the threaded rod to facilitate rotation and adjustment. Then adjust the height of the support rod by rotating the threaded sleeve, and tools such as wrenches or pliers can be used to assist in rotation; after adjusting to the appropriate height, use locking nuts or pins to lock them through the alignment holes on the threaded sleeve and the threaded rod to prevent loosening during use; during the use of the support rod, regular inspections and maintenance should be carried out, paying attention to the wear of the threads and the stability of the structure, and timely discovering and dealing with potential safety hazards. Choose high-strength steel to make the rotating shaft, threaded rod and threaded sleeve; the rotating shaft is precision machined to ensure smooth rotation on the support rod and sufficient strength to support the structure. Fasteners need to be set at the end of the shaft to prevent axial movement during use. Fix the rotating shaft in the middle of the support rod and connect it with welding or high-strength bolts; insert the threaded rod through the center of the rotating shaft and match it with the sleeve. Check whether the thread is smooth and there is no jamming. Adjust the angle of the support foot by rotating the rotating shaft to ensure that it can be freely adjusted within 0-180 degrees and can be fixed at any angle. Adjust the length of the support foot by rotating the threaded sleeve from the maximum extension length to the fully retracted state. Check whether the adjustment process is smooth and whether it has enough capacity to support the expected maximum load. Use carbon steel to make the support plate, splint and connecting bolts, and use spring steel to make the self-locking spring; the support plate is welded to the upper end of the support frame, and a hole is opened in the middle to reduce weight and adapt to different shapes of steel arch frames. There are two clamps with holes at the bottom, which are connected by self-locking springs. Precision cutting and drilling are required to ensure the accuracy and stability of the structure. The pallet is welded to the upper end of the support rod. During the welding process, it is necessary to ensure that the position of the pallet is correct, the welding is firm, and there are no welding defects such as pores or cracks. The two clamps are connected to the two ends of the pallet through self-locking springs. The self-locking springs must be installed correctly so that they can automatically adjust the clamping force under different loads. The connecting bolts require high-precision thread processing to ensure that they can smoothly pass through the holes of the clamps and the pallet. The connecting bolts pass through the holes at the bottom of the clamps and the holes of the pallet in turn, and are tightened by nuts. This step requires ensuring that all connectors are tightly fitted and correctly installed; functional tests are carried out after assembly, including angle adjustment, length adjustment and automatic locking functions. Ensure that under actual loads, the self-locking springs can automatically adjust to adapt to steel arches of different sizes and shapes, and perform pressure tests to simulate the load conditions in actual use to check whether the arch clamp can stably carry the expected maximum load.

[0014] Specifically, holes are provided on the support rods for inserting pins to prevent loosening after height adjustment; the support legs can be adjusted in an opening angle range of 30 to 180 degrees to meet different usage requirements.

[0015] In this embodiment: drilling equipment is used to accurately drill holes on the support rod. These holes are used to insert pins to prevent loosening after adjustment. It is ensured that the position and size of the holes meet the design specifications to meet the locking requirements of different positions; a rotating shaft is installed at the upper end of the support foot, and the shaft allows the support foot to adjust the opening angle within a certain range (30 degrees to 180 degrees). It is ensured that the rotating shaft is firmly installed and can rotate smoothly to facilitate angle adjustment. Angle scales are marked on the support foot from 30 degrees to 180 degrees to facilitate users to make precise adjustments. A locking mechanism is designed and installed to ensure that the support foot can firmly maintain the angle after adjusting to a specific angle.

[0016] Specifically, an anti-skid pad is arranged on the inner side of the arch frame clamp to increase the friction force with the contact surface of the steel arch frame.

[0017] In this embodiment: select materials with high friction coefficient, such as rubber, silicone or high-density foam, and accurately measure the size and shape of the required anti-slip pad according to the size and shape of the arch clamp to ensure that it can completely cover the contact surface on the inside of the clamp. Before installing the anti-slip pad, make sure that the contact surface on the inside of the arch clamp is clean and free of oil or rust to improve the bonding strength. Use a high-strength, weather-resistant adhesive, such as epoxy resin, to ensure that the gasket is firmly bonded to the inside of the clamp.

[0018] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A retractable multi-legged tunnel arch temporary support device, characterized in that: The invention comprises a support rod (1), a support foot (2) and an arch frame clamp (3); the support rod (1) is used for main support, and the upper end of the support rod (1) is connected to the arch frame clamp (3); the support rod (1) comprises a threaded rod and a threaded sleeve, and the height of the support rod is adjusted by rotating the threaded sleeve; the support foot (2) comprises a rotating shaft, a threaded rod and a threaded sleeve, and is used for auxiliary support; the upper end of the support foot (2) is fixed to the middle of the support rod through a rotating shaft, and the opening angle of the support foot is adjusted by the rotating shaft, and the length of the support foot is adjusted by rotating the threaded sleeve; the arch frame clamp (3) is arranged at the upper end of the support rod (1), and is used to connect the support rod (1) and the actual steel arch frame; the arch frame clamp (3) comprises A support plate (301), a clamping plate (302), a connecting bolt (303), a connecting nut (304) and a self-locking spring (305); the support plate (301) is welded to the upper end of the support rod (1) and has a hole in the middle; there are two clamping plates (302) with holes in the bottom, which are located at both ends of the support plate (301) and connected by a self-locking spring (305); the connecting bolt (303) passes through the hole at the bottom of the clamping plate (302) and the hole of the support plate (301) in sequence; the support plate (301) and the clamping plate (302) are adapted to steel arch frames of different sizes and shapes through the self-locking spring (305); the self-locking spring (305) is used to ensure that the clamping force is automatically adjusted when bearing a load.

2. The retractable multi-legged tunnel arch temporary support device according to claim 1, characterized in that: The support rod (1) is provided with a hole for inserting a pin to prevent loosening after height adjustment; the support foot (2) has an opening angle adjustment range of 30 to 180 degrees to meet different usage requirements.

3. The retractable multi-legged tunnel arch temporary support device according to claim 1, characterized in that: An anti-skid pad is arranged on the inner side of the arch frame clamp (3) to increase the friction force of the contact surface with the steel arch frame.

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