CN202731940U - Longitudinal connection device for tunnel steel arch - Google Patents

Abstract

The utility model discloses a tunnel steel arch longitudinal connection device, which is characterized in that a plurality of connecting rods are arranged at equal intervals on the steel arch, and the two ends of the connecting rods extend along the axial direction of the steel arch. Out of the steel arch frame, the two ends of the connecting rod are provided with threads in opposite directions, and the connecting rods of two adjacent steel arch frames are connected by a sleeve, and then the two adjacent steel arch frames The frame is connected as one. The utility model adopts the method of screw connection between the steel arch frames, and the process has greater advantages than traditional welding in terms of operation difficulty, work efficiency, safe and civilized construction, and quality control. In particular, it meets the requirements of "short footage and fast closure" in the 18-character guideline for underground excavation of subway tunnels, and has played a great role in ensuring the quality of on-site construction and eliminating potential safety hazards.

Description

Longitudinal connection device for tunnel steel arch

technical field

The utility model relates to a tunnel construction device, in particular to a tunnel steel arch vertical connection device.

Background technique

The initial support of tunnel shallow buried excavation method adopts steel arch frame + sprayed concrete, in which the distance between steel arch frames is generally 50cm, and the longitudinal connecting bars are used to connect each arch frame to ensure its overall stability. It is connected by single-sided lap welding.

The shortcoming that prior art exists:

1. The speed is slow, usually it takes 90 minutes for 2 welders to weld a grid.

2. The pollution is heavy, welding produces a large amount of poisonous gas, and the operation is closed in the tunnel, so it is difficult to get rid of the polluted gas.

3. The construction quality is poor. Since the on-site welding requires overhead welding and the work needs to be carried out from the grille gap, the welding quality is difficult to guarantee.

Utility model content

In view of the above problems, the utility model provides a longitudinal connection device for tunnel steel arches, in which a plurality of connecting rods are arranged at equal intervals on the steel arch, and the two ends of the connecting rods are along the axis of the steel arch The two ends of the connecting rods are provided with threads in opposite directions, and the connecting rods of the two adjacent steel arches are connected by a sleeve, and then the two adjacent The steel arch frame is connected as a whole.

The utility model adopts the method of screw connection between the steel arch frames, and the process has greater advantages than traditional welding in terms of operation difficulty, work efficiency, safe and civilized construction, and quality control. In particular, it meets the requirements of "short footage and fast closure" in the 18-character guideline for underground excavation of subway tunnels, and has played a great role in ensuring the quality of on-site construction and eliminating potential safety hazards.

Description of drawings

Fig. 1 is a structural schematic diagram of the utility model tunnel steel arch longitudinal connection device.

Fig. 2 is a partially enlarged connection schematic diagram of the utility model tunnel steel arch longitudinal connection device.

Detailed ways

Referring to Fig. 1, the tunnel steel arch longitudinal connection device 1 of the present utility model is equipped with a plurality of connecting rods 20 equally spaced on the steel arch 10, and the connecting rods 20 and the steel arch 10 The two ends of the connecting rod 20 extend out of the steel arch 10 along the axial direction of the steel arch 10. As shown in FIG. 2, the two ends of the connecting rod 20 are provided with opposite directions. The connecting rods 20 of the two adjacent steel arches 10 are connected by a straight thread connection through a sleeve 30, and then the two adjacent steel arches 10 are connected as a whole.

When applying the utility model tunnel steel arch vertical connection device 1:

1. Firstly, according to the length of the designed steel arch 10 spacing, the connecting rod 20 is blanked and threaded, and aligned on the flat ground.

2. After the excavation of the tunnel, the steel arches 10 are installed, and the two adjacent steel arches 10 are connected as a whole through the sleeve 30 through the straight thread connection between the adjacent steel arches 10 .

The above descriptions are only preferred embodiments of the utility model, and do not limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not used to limit the utility model. Those skilled in the art, without departing from the scope of the technical solution of the utility model, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all the technical solutions of the utility model do not depart from Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model still belong to the scope of the technical solution of the utility model.

Claims (1)

1. tunnel steel arch frame one-above-the-other layout, it is characterized in that a plurality of connecting rods that are laid with in described steel arch frame equal intervals, described steel arch frame is extended along described steel arch frame axis direction in described connecting rod two ends, the two ends of described connecting rod are provided with the screw thread of opposite direction, the described connecting rod of adjacent two described steel arch framves is connected by a sleeve, and then adjacent two described steel arch framves are connected as a single entity.

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