Foot-lock anchor pipe positioning fixture for tunnel steel arch

Abstract

The utility model discloses a feet-lock anchor pipe positioning fixture for a tunnel steel arch, which is clamped on the steel arch and comprises two oppositely arranged U-shaped clamping plates. Each U-shaped clamping plate is composed of two first panels arranged in parallel and second panels connected with the two first panels, one first panel of the two U-shaped clamping plates is rotationally connected, and the other first panel of the two U-shaped clamping plates is fixed through a bolt structure. Positioning pipes with circular cross sections are mounted on the second panels of the two U-shaped clamping plates; and the positioning pipes are rotationally connected with the second panels through rotating devices. The device has the advantages that rework caused by nonstandard angles and construction can be avoided, the construction efficiency of workers is improved, and the driving position and angle of the feet-lock anchor pipe are effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of a locking foot anchor pipe positioning device, in particular to a locking foot anchor pipe positioning fixture used for a tunnel steel arch frame. Background Art

[0002] The tunnel support system generally includes advance support, initial support and secondary lining. The initial support is the most important load-bearing structure in the tunnel project, and its bearing capacity directly determines the safety level during the tunnel construction and operation. The locking foot anchor pipe can effectively suppress the displacement and deformation of the steel frame. The setting parameters of the anchor pipe and its connection form with the steel frame have an important influence on the overall stability of the support system. The setting angle of the locking foot anchor pipe is an important parameter that affects its effect in controlling the sinking of the steel arch frame. The force is entirely provided by the anchor pipe axial direction, ignoring the supporting effect of the surrounding rock at the arch foot on the steel arch frame in this direction.

[0003] The traditional locking foot anchor pipe uses manual angle adjustment, and welding is used at the contact point between the Ф25L steel bar and the steel frame, and at the connection point between the Ф25L steel bar and the locking foot anchor pipe. The welding length at the contact point between the Ф25L steel bar and the steel frame cannot be less than 12.5cm. The Ф25L steel bar must be welded on the locking foot anchor pipe. The angle of the locking foot anchor pipe is not easy to control, and it is difficult to adjust it according to the direction of the rock formation. The position of the welding process is highly random, and workers often choose simple operations based on the on-site construction environment. Among them, the construction of 6 locking foot anchor pipes on one side of the soft surrounding rock tunnel can effectively suppress the deformation of the initial support, but the spacing between the 6 locking foot anchor pipes is very small, and the drilling accuracy requirements are very high. It is very easy to cross-drill during implementation, and the construction quality is difficult to guarantee.

[0004] Therefore, there is a need for a locking foot anchor pipe positioning fixture for a tunnel steel arch frame that can solve the above problems. Summary of the invention

[0005] The purpose of the utility model is to provide a locking foot anchor pipe positioning fixture for a tunnel steel arch frame in accordance with the above-mentioned deficiencies in the prior art. The locking foot anchor pipe positioning fixture is composed of two relatively arranged U-shaped splints, and a rotatable positioning tube is arranged on the U-shaped splint. The position of the positioning tube is adjusted according to the installation angle of the locking foot anchor pipe, which can avoid rework caused by irregular angles and construction, improve the work efficiency of workers, and effectively ensure the installation position and angle of the locking foot anchor pipe.

[0006] The purpose of this utility model is achieved by the following technical solutions:

[0007] A locking foot anchor pipe positioning fixture for a tunnel steel arch frame, the locking foot anchor pipe positioning fixture is clamped on the steel arch frame, the locking foot anchor pipe positioning fixture includes two relatively arranged U-shaped clamps, the U-shaped clamp is composed of two parallel first panels and second panels respectively connected to the two first panels, one of the first panels of the two U-shaped clamps is rotatably connected to each other, the other first panels of the two U-shaped clamps are fixed by a bolt structure, and the second panels of the two U-shaped clamps are both installed with positioning tubes with circular cross-sections, and the positioning tubes are rotatably connected to the second panels through a rotating device.

[0008] The rotating device includes a turntable and a rotating rod. The turntable is rotatably connected to the bearing on the second panel through the rotating rod. The positioning tube is fixed on the turntable. The turntable is provided with a plurality of first threaded holes along its circumference. The second panel is provided with a plurality of second threaded holes at its corresponding positions. The turntable is fixed by passing a fixing screw through the first threaded hole and the second threaded hole in sequence.

[0009] The second panel is provided with an angle scale.

[0010] The first panels of the two U-shaped splints are rotatably connected via a hinge.

[0011] The bolt structure comprises two nuts and a screw rod, the two nuts are respectively mounted on the other first panel of the two U-shaped clamping plates, and the screw rod is matched with the two nuts respectively.

[0012] The utility model has the advantages of avoiding rework caused by irregular angles and construction, improving the working efficiency of workers, and effectively ensuring the installation position and angle of the locking foot anchor pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of the locking foot anchor pipe positioning fixture of the utility model;

[0014] Figure 2 It is a cross-sectional view of the rotating device of the utility model;

[0015] Figure 3 The utility model is a construction process flow chart of the locking foot anchor pipe positioning fixture. DETAILED DESCRIPTION

[0016] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by technicians in the same industry:

[0017] like Figures 1 to 3 As shown, the marks in the figure represent respectively:

[0018] U-shaped clamping plate 1, positioning tube 2, rotating disk 3, rotating rod 4, bearing 5, first threaded hole 6, second threaded hole 7, nut 8, screw rod 9.

[0019] Example: Figures 1 to 3 As shown, this embodiment relates to a locking foot anchor pipe positioning fixture for a tunnel steel arch frame, the locking foot anchor pipe positioning fixture is clamped on the steel arch frame, and the locking foot anchor pipe positioning fixture mainly includes two U-shaped clamps 1 arranged opposite to each other, and the notch formed between the two U-shaped clamps 1 is wrapped around the steel arch frame. The U-shaped clamp 1 is composed of two first panels arranged in parallel and second panels connected to the two first panels respectively, and one first panel of the two U-shaped clamps 1 is rotatably connected. Specifically, one first panel of the two U-shaped clamps 1 is rotatably connected by a hinge, and the other first panels of the two U-shaped clamps 1 are fixed by a bolt structure, and the bolt structure includes two nuts 8 and a screw 9, and the two nuts 8 are respectively installed on the other first panels of the two U-shaped clamps 1, and the screw 9 is respectively matched with the two nuts 8 to fix the other first panels of the two U-shaped clamps 1.

[0020] like Figure 1~2 As shown, a positioning tube 2 with a circular cross section is installed on the second panel of the two U-shaped splints 1. The positioning tube 2 is used to place the locking foot anchor pipe. The positioning tube 2 is rotatably connected to the second panel of the U-shaped splint 1 through a rotating device. The rotating device includes a turntable 3 and a rotating rod 4. The turntable 3 is rotatably connected to the bearing 5 on the second panel through the turntable 4. The positioning tube 2 is fixed on the turntable 3. The turntable 3 is provided with a plurality of first threaded holes 6 along its circumference. The second panel is provided with a plurality of second threaded holes 7 at its corresponding position. The position of the positioning tube 2 is adjusted by rotating the turntable 3, so as to ensure the accuracy of the installation angle of the locking foot anchor pipe. When the position of the positioning tube 2 is adjusted, the turntable 3 is fixed by passing the first threaded hole 6 and the second threaded hole 7 in sequence through the fixing screw. In addition, an angle scale is provided on the second panel to facilitate the precise adjustment of the position of the positioning tube 2.

[0021] like Figures 1 to 3 As shown, this embodiment also has the following construction method:

[0022] Install the steel arch frame and position it.

[0023] Use an elastic line to determine the installation position of each locking foot anchor pipe positioning fixture.

[0024] Install the locking foot anchor pipe positioning fixture according to the position marked by the elastic line.

[0025] Install the locking foot anchor pipe at the predetermined angle to ensure that the position and angle of the locking foot anchor pipe meet the design requirements.

[0026] After drilling the hole, remove the locking foot anchor pipe positioning fixture and proceed with subsequent construction.

[0027] The beneficial technical effects of this embodiment are: it can avoid rework caused by irregular angles and construction, improve the workers' construction efficiency, and effectively ensure the installation position and angle of the locking foot anchor pipe.

[0028] Although the above embodiments have described the concepts and embodiments of the purpose of the utility model in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the utility model without departing from the scope of the claims, so they are not described one by one here.

Claims

1. A locking foot anchor pipe positioning fixture for a tunnel steel arch frame, characterized in that: The locking foot anchor tube positioning fixture is clamped on the steel arch frame, and the locking foot anchor tube positioning fixture comprises two relatively arranged U-shaped splints, and the U-shaped splint is composed of two parallel first panels and second panels respectively connected to the two first panels, one of the first panels of the two U-shaped splints is rotatably connected, and the other first panels of the two U-shaped splints are fixed by a bolt structure, and the second panels of the two U-shaped splints are both installed with positioning tubes with circular cross-sections, and the positioning tubes are rotatably connected to the second panels through a rotating device; the rotating device comprises a turntable and a rotating rod, and the turntable is rotatably connected to the bearing on the second panel through the rotating rod, and the positioning tube is fixed to the turntable, and the turntable is provided with a plurality of first threaded holes along its circumference, and the second panel is provided with a plurality of second threaded holes at its corresponding positions, and the turntable is fixed by a fixing screw passing through the first threaded hole and the second threaded hole in sequence.

2. The locking foot anchor pipe positioning fixture for tunnel steel arch frame according to claim 1, characterized in that: The second panel is provided with an angle scale.

3. The locking foot anchor pipe positioning fixture for tunnel steel arch frame according to claim 1, characterized in that: The first panels of the two U-shaped splints are rotatably connected via a hinge.

4. The locking foot anchor pipe positioning fixture for tunnel steel arch frame according to claim 1, characterized in that: The bolt structure comprises two nuts and a screw rod, the two nuts are respectively mounted on the other first panel of the two U-shaped clamping plates, and the screw rod is matched with the two nuts respectively.

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