Tunnel inverted arch lining side wall steel bar combined positioning bent frame

Abstract

The utility model discloses a tunnel inverted arch lining side wall reinforcing steel bar combined positioning bent frame which comprises a main reinforcing steel bar restraining beam, an adjusting assembly and an outer layer template restraining beam, the main reinforcing steel bar restraining beam is located on the inner sides of two rows of main reinforcing steel bars of a tunnel inverted arch lining side wall, and the adjusting assembly is located on the main reinforcing steel bar restraining beam. The distance between the inverted arch side wall reinforcing steel bar layers is adjusted through the adjusting assembly; the outer layer formwork restraining beam is located at the position of a tunnel inverted arch lining side wall formwork and tightly attached to an inverted arch lining side wall outer layer reinforcing steel bar to further restrain the tunnel inverted arch lining side wall reinforcing steel bar. The positioning device can improve construction efficiency, is convenient to install, suitable for positioning construction of tunnel engineering inverted arch side wall steel bar layer spacing and protective layer thickness, light in overall structure, easy to manufacture, high in turnover utilization rate, economical and practical.

Description

Technical Field

[0001] The utility model relates to a quick positioning rack for the construction of the reinforcement of the invert lining of a tunnel, specifically a combined positioning rack for controlling the thickness of the reinforcement protection layer and the layer spacing of the side wall reinforcement of the invert lining of a tunnel. Background Technique

[0002] The development of high-speed railways and highways has brought revolutionary changes to the transportation industry, and their characteristics of fast speed, high efficiency, safety, and comfort are deeply favored by people. Tunnel engineering construction is one of the important components. The drill and blast method is adopted for construction, and the lining adopts a composite lining, which is a reinforced concrete structure. The tunnel lining is a permanent support structure for tunnel engineering construction. Generally, the invert and the side wall lining of the tunnel are poured separately. The accurate positioning of the spacing, layer spacing, and protection layer of the embedded reinforcement in the invert is related to the accurate connection with the reinforcement of the side wall lining. The spacing, layer spacing, and protection layer of the conventional reserved reinforcement in the invert are measured by operators and then the reinforcement is positioned. However, during the pouring process of the invert concrete, the extrusion of the concrete on the reinforcement easily causes the reinforcement to be displaced, thus affecting the unevenness of the reinforcement spacing, the non-compliance of the layer spacing, and the too large or too small protection layer, directly affecting the durability of the lining and the structural stress, and bringing quality hidden dangers to the safety of the tunnel structure and the operation safety. Therefore, it is crucial to ensure the construction quality of the tunnel lining reinforcement during the construction process.

[0003] Therefore, it is necessary to study a combined positioning rack for the side wall reinforcement of the invert lining of a tunnel with high work efficiency, easy installation, light structure, simple production, high turnover utilization rate, and economic applicability, so as to improve the construction quality of the lining entity and ensure the safety and reliability of tunnel operation. Content of the Utility Model

[0004] In view of this, the utility model provides a combined positioning rack for the side wall reinforcement of the invert lining of a tunnel, which has the advantages of improving construction efficiency, simple operation, light structure, high recycling rate, and economic applicability.

[0005] The combined positioning rack for the side wall reinforcement of the invert lining of the utility model comprises two main reinforcement constraint beams, an adjusting component, and an outer formwork constraint beam. The main reinforcement constraint beams are connected through the adjusting component. By adjusting the adjusting component, the layer spacing positioning of the invert lining reinforcement can be quickly realized. The outer formwork constraint beam is at the side wall formwork and is fixed to the inner layer reinforcement of the invert lining to realize the constraint of the reinforcement protection layer of the side wall of the invert lining.

[0006] Furthermore, the main reinforcement constraint beam is located inside two rows of main reinforcements on the side wall of the invert lining of the tunnel, and comprises an inner reinforcement constraint beam and an outer reinforcement constraint beam.

[0007] Furthermore, the inner reinforcement constraint beam is located on the side of the reinforcement close to the tunnel side wall, and the outer reinforcement constraint beam is located on the side of the reinforcement far from the tunnel side wall.

[0008] Further, a main steel bar limiting groove is provided on the main steel bar restraint beam. The main steel bar limiting groove is used to limit the main steel bars of the side wall of the tunnel invert lining, and the main steel bar limiting grooves correspond to the main steel bars of the side wall of the tunnel invert lining one by one.

[0009] Further, the adjusting components are arranged between the main steel bar restraint beams, and a certain distance is spaced between the adjusting components.

[0010] Further, the adjusting component includes a fixed end and an adjusting rod. The fixed end is fixed on the main steel bar restraint beam, and the spacing between the lining steel bar layers is controlled by rotating the adjusting rod.

[0011] Further, the outer formwork restraint beam is located at the formwork of the side wall of the tunnel invert lining, closely attached to the outer layer of steel bars of the side wall of the tunnel invert lining, and further restrains the steel bars of the side wall of the tunnel invert lining.

[0012] The beneficial effects of the present utility model: The combined positioning row frame for the steel bars of the side wall of the tunnel invert lining of the present utility model has the advantages of improving construction efficiency, simple operation, light structure, high recycling rate, and can improve the construction quality of the lining entity to ensure the safety and reliability of tunnel construction. Description of the Drawings

[0013] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0014] Figure 1 It is a structural schematic diagram of the present utility model.

[0015] Figure 2 It is a top view of the structure of the present utility model. Detailed Embodiments

[0016] Figure 1 It is a structural schematic diagram of the present utility model, Figure 2 It is a top view of the structure of the present utility model; as shown in the figure: The combined positioning row frame for the steel bars of the side wall of the tunnel invert lining of the present utility model includes a main steel bar restraint beam 1, an adjusting component 2, and an outer formwork restraint beam 3. The main steel bar restraint beam 1 is located inside the two rows of main steel bars of the side wall of the tunnel invert lining, and includes an inner steel bar restraint beam 11 and an outer steel bar restraint beam 12. A main steel bar limiting groove 13 is provided on the main steel bar restraint beam 1. The main steel bar limiting groove 13 is used to limit the main steel bars of the side wall of the tunnel invert lining, and the main steel bar limiting grooves 13 correspond to the main steel bars of the side wall of the tunnel invert lining one by one. The adjusting component includes a fixed end 21 and an adjusting rod 22. The fixed end 21 is fixed on the main steel bar restraint beam 1, and the spacing between the lining steel bar layers is controlled by rotating the adjusting rod 22. The outer formwork restraint beam 3 is located at the formwork of the side wall of the tunnel invert lining, closely attached to the outer layer of steel bars of the side wall of the tunnel invert lining, and further restrains the steel bars of the side wall of the tunnel invert lining;

[0017] In this embodiment, when constructing the sidewall steel bars of the invert lining on-site, the positioning rack for the sidewall steel bars of the invert lining is installed at 20 cm above the top surface of the designed elevation of the sidewall lining. Adjust the adjusting rod 22 to the designed layer spacing of the invert lining steel bars. When installing, the positioning rack for the sidewall steel bars of the invert lining should be kept consistent with the longitudinal slope of the tunnel line; the outer formwork restraint beam 3 of the invert lining steel bars should be firmly connected to the top of the sidewall formwork of the invert.

[0018] In this embodiment, the main steel bar restraint beam 1 processes the limit slots in the steel component processing factory. The main steel bar limit slots 13 can be directly grooved on the limit beam or can be formed by welding steel bars into slots. The main steel bar limit slots correspond one by one to the main steel bars of the sidewall of the tunnel invert lining and are applicable to the positioning construction of the main steel bars of the sidewall lining.

[0019] In this embodiment, the main steel bar restraint beam 1 is fixedly connected to the fixed end 21 of the adjusting assembly 2. The two side notches of the main steel bar restraint beam 1 face the two rows of main steel bars of the lining respectively. The adjusting assembly 2 can be set at one every 3 m, and the length of each positioning rack section is 6 m. After combination, the total length set on one side of the tunnel is 12 m.

[0020] In this embodiment, the outer formwork restraint beam 3 is fixed at the sidewall formwork of the invert, and the single-side set length is 12 m.

[0021] In this embodiment, the positioning rack for the layer spacing of the sidewall steel bars of the invert lining is installed at 20 cm above the top surface of the designed elevation of the sidewall lining, and the adjusting rod 22 is adjusted to the designed layer spacing of the lining steel bars; after the sidewall formwork of the invert lining is positioned, the outer formwork restraint beam 3 is closely attached to the outer layer steel bars of the sidewall of the invert lining.

[0022] In this embodiment, all the main steel bars of the invert lining are processed in advance by the steel component processing factory and transported to the site for installation. Positioning steel bars are set at the bottom of the tunnel and the sidewall of the invert. The surveyors mark the positions of the two layers of steel bars on the positioning steel bars. After the steel bars are tied up, the positioning rack for the layer spacing of the sidewall steel bars of the invert lining is installed, adjusted to the designed layer spacing of the steel bars, and then the sidewall formwork of the invert is accurately positioned. The outer formwork restraint beam 3 is closely attached to the outer layer steel bars of the sidewall of the invert lining and fixed firmly. Thus, the installation of this rack is completed.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A tunnel invert lining side wall steel bar combined positioning bent frame, characterized by: It includes a main steel bar restraint beam and an adjustment component, wherein the main steel bar restraint beam restrains and limits the main steel bars of the tunnel invert lining side wall, and the adjustment component is used to adjust the spacing between the main steel bar restraint beams; It also includes an outer layer formwork restraining beam, and the outer layer formwork restraining beam further restrains the outer layer steel bars of the invert lining side wall.

2. The tunnel invert lining side wall steel bar combined positioning bent frame according to claim 1 is characterized in that: The main steel bar restraint beam is located inside two rows of main steel bars of the tunnel invert lining side wall, and includes an inner steel bar restraint beam and an outer steel bar restraint beam.

3. The tunnel invert lining side wall steel bar combined positioning bent frame according to claim 2 is characterized by: The inner steel bar restraint beam is located at a side of the steel bar close to the tunnel side wall, and the outer steel bar restraint beam is located at a side of the steel bar away from the tunnel side wall.

4. The tunnel invert lining side wall steel bar combined positioning bent frame according to claim 2, characterized in that: A main steel bar limiting groove is provided on the main steel bar restraining beam, and the main steel bar limiting groove is used to limit the main steel bars of the tunnel invert lining side wall, and the main steel bar limiting groove corresponds to the main steel bars of the tunnel invert lining side wall one by one.

5. The tunnel invert lining side wall reinforcement combined positioning bent frame according to claim 1 is characterized in that: The adjusting components are arranged between the main reinforcement restraining beams, and the adjusting components are spaced a certain distance apart.

6. The tunnel invert lining side wall reinforcement combined positioning bent frame according to claim 5 is characterized in that: The adjustment component comprises a fixed end and an adjustment rod, wherein the fixed end is fixed on the main reinforcement restraining beam, and the spacing between lining reinforcement layers is controlled by rotating the adjustment rod.

7. The tunnel invert lining side wall steel bar combined positioning bent frame according to claim 1 is characterized by: The outer layer formwork restraint beam is located at the tunnel invert lining side wall formwork, close to the outer layer steel bars of the tunnel invert lining side wall, and further restrains the tunnel invert lining side wall steel bars.

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