Adjusting device for joint of hydraulic tunnel TBM construction profile steel arch center
By adopting a connection design of steel arch frames and channel steel in the construction of hydraulic tunnels using TBMs, and utilizing equipment arch frame installers and hydraulic cylinders to tighten the rock surface, the problem of long installation time for steel arch frames was solved, enabling rapid closure into a ring and self-stabilization of the surrounding rock, thus improving construction efficiency and safety.
Patent Information
- Application Number
- CN202423291053.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In traditional TBM construction of hydraulic tunnels, the installation of medium-sized steel arch frames is time-consuming, physically demanding, and requires high precision in bolt hole positioning, resulting in long support times and difficulty in quickly forming an overall support structure.
The design employs a combination of multiple steel arch frames and channel steel. The steel arch frames are supported on the rock surface by the equipment arch frame installer and hydraulic cylinder, and then fixed with bolts. The channel steel is connected to the steel arch frames through waist-shaped holes and sliding grooves, enabling rapid closure into a ring. The channel steel is then welded to the steel arch frames for reinforcement.
This technology enables the rapid closure of steel arch frames into rings, ensuring close contact with the surrounding rock, improving construction efficiency, enhancing the self-stabilizing capacity of the surrounding rock, and guaranteeing construction safety and efficiency.
Smart Images
Figure CN223536372U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of tunnel construction technology, specifically relating to an adjustment device for the connection of a steel arch frame in a hydraulic tunnel TBM construction. Background Technology
[0002] The geological conditions of the hydraulic tunnel are extremely complex. The main geological challenges during construction include significant water inflow in the marble and fractured zones, rock bursts in deeply buried sections, and loose, fractured, and water-bearing material in fault zones, resulting in poor self-stability of the surrounding rock and a high risk of instability during construction. To address these geological challenges, when the surrounding rock is weak, severely fractured, and has poor self-stability, early support with high rigidity is required after excavation. Early closure into a ring is necessary to form a unified structure, preventing excessive deformation of the surrounding rock. This allows for rapid bonding of the steel arch frame to the rock surface, maximizing the self-bearing capacity of the surrounding rock and ensuring structural stability and construction safety.
[0003] The erection of steel arch frames is a crucial step in the initial support of tunnels. To ensure tunnel construction quality, the steel arch frames must be precisely assembled into rings during this process. Currently, in traditional TBM (Tube Milling) construction of hydraulic tunnels, the steel arch frames are assembled according to the actual site conditions. Each steel arch frame employs a closed design, with each frame consisting of steel plates welded to the ends, pre-drilled bolt holes in the plates, and then bolted together to form a single unit. This method of installation is time-consuming, physically demanding for workers, requires high precision in bolt hole placement, and involves extended support periods. Utility Model Content
[0004] To overcome the shortcomings of existing technologies, this utility model provides an adjustment device for the connection of steel arch frame in TBM construction of hydraulic tunnels, which can quickly close the steel arch frame into a ring, tightly fit the surrounding rock, improve construction efficiency, and save time and labor.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] An adjustment device for the connection of steel arch frames in TBM construction of hydraulic tunnels includes multiple steel arch frames b and two steel arch frames a, wherein the steel arch frames b are fixedly connected to each other;
[0007] The two steel arch frames a are arranged adjacent to each other, and channel steel is provided on both sides of the web of the steel arch frame a; the channel steel is arc-shaped, and a waist-shaped hole is provided on the web of the channel steel, and a sliding groove is provided on both sides of the waist-shaped hole;
[0008] The two ends of the channel steel are fixedly connected to the steel arch frame a by sliding grooves and bolts respectively; the two channel steels are fixedly connected by waist-shaped holes and bolts; the steel arch frame a, the steel arch frame b and the channel steel are closed to form a ring.
[0009] Furthermore, the two ends of the interconnected steel arch frame b are respectively welded with connecting steel plates, the connecting surfaces of the two connecting steel plates overlap, and the connecting steel plates are fixedly connected by bolts.
[0010] Furthermore, bolt holes are provided on the connecting steel plate.
[0011] Furthermore, a connecting steel plate is welded to one end of the connection between the steel arch frame a and the steel arch frame b, and the connection is fixed by bolts.
[0012] Furthermore, both the steel arch frame a and the steel arch frame b are I-beams.
[0013] Furthermore, the connection points of the two connecting steel plates are reinforced by welding.
[0014] Furthermore, the channel steel is disposed between the end plates of the steel arch frame a.
[0015] Furthermore, the web of the channel steel coincides with the web of the steel arch frame a, and the end plate of the channel steel coincides with the end plate of the steel arch frame a. The channel steel and the web and end plate of the steel arch frame a are reinforced by welding.
[0016] The beneficial effects of this utility model are:
[0017] 1) Each steel arch frame of this utility model adopts an open design. The assembled steel arch frame is supported on the rock surface by using the equipment arch frame installer combined with the oil cylinder. Then, the opening position of the arch frame is fastened and locked with bolts.
[0018] 2) This utility model can quickly assemble the steel arch frame into a ring, closely fit the surrounding rock, improve construction efficiency, save time and labor, enable the initial support to quickly play its rigidity role, limit the deformation of the surrounding rock mass to a certain extent, enhance the self-stabilizing ability of the surrounding rock, and ensure construction safety. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a detailed drawing of the opening connection of the steel arch frame of this utility model;
[0021] Figure 3 This is a side view of the connection between the channel steel and the steel arch frame of this utility model;
[0022] Figure 4 This is a side view of the channel steel connection of this utility model;
[0023] Figure 5 This is a cross-sectional view of the steel arch frame connection of this utility model;
[0024] In the diagram, 1-steel arch frame a, 2-channel steel, 3-waist-shaped hole, 4-slide groove, 5-connecting steel plate, 6-bolt hole, 7-bolt, 8-φ22 steel bar, 9-steel arch frame b. Detailed Implementation
[0025] The present invention will now be described in detail with reference to specific embodiments.
[0026] This invention enables the rapid closure of steel arch frames into a ring, tightly fitting the surrounding rock, improving construction efficiency, saving time and labor, allowing the initial support to quickly exert its rigidity, limiting the deformation of the surrounding rock mass to a certain extent, enhancing the self-stabilizing ability of the surrounding rock, and ensuring construction safety. The specific structure is as follows:
[0027] like Figure 1 As shown, this utility model includes multiple steel arch frames b9 and two steel arch frames a1. Both steel arch frames a1 and b9 are I-beams, and the steel arch frames b9 are fixedly connected to each other. Figure 5 As shown, the two ends of the interconnected steel arch frame b9 are welded with connecting steel plates 5, the connecting surfaces of the two connecting steel plates 5 overlap, and the connecting steel plates 5 are fixedly connected by bolts 7; bolt holes 6 are provided on the connecting steel plates 5. The connection position of the two connecting steel plates 5 is reinforced by welding.
[0028] like Figure 2 , 3 As shown in Figure 4, two steel arch frames a1 are arranged adjacent to each other. A connecting steel plate 5 is welded to one end of the connection between steel arch frame a1 and steel arch frame b9, and the connection is secured by bolts 7. Channel steel 2 is provided on both sides of the web of steel arch frame a1. The channel steel 2 is arc-shaped, and a waist-shaped hole 3 is provided on the web of the channel steel 2. Sliding grooves 4 are provided on both sides of the waist-shaped hole 3. The two ends of the channel steel 2 are secured to the steel arch frame a1 through the sliding grooves 4 and bolts 7, respectively. The two channel steels 2 are secured together through the waist-shaped hole 3 and bolts 7. Steel arch frame a1, steel arch frame b9, and channel steel 2 form a closed ring. This utility model uses two channel steels to clamp the open steel arch frame and secure it with bolts. The waist-shaped hole in the middle of the channel steel serves to fix the open steel arch frame. The side holes of the channel steel and the adjustment holes of the steel arch frame are all designed with sliding grooves to facilitate the expansion and contraction adjustment of the steel arch frame.
[0029] Channel steel 2 is placed between the end plates of the steel arch frame a1. The web of channel steel 2 coincides with the web of the steel arch frame a1, and the end plate of channel steel 2 coincides with the end plate of the steel arch frame a1. Channel steel 2 is reinforced with welding to the web and end plates of the steel arch frame a1.
[0030] The specific method for installing steel arch frames using this utility model is as follows:
[0031] The steel arch frame is pre-assembled and installed behind the cutter head using the steel frame installer provided with the TBM equipment. Then, the arch frame installer is used to assemble the steel arch frame from bottom to top. The connecting steel plates of two sections of the steel arch frame are aligned and fixed with bolts. The arch frame installer is rotated to assemble the next section of the steel arch frame, and so on. After the upper arch frame is assembled, all bolts at the connection of the steel arch frame are checked and tightened again. The joints of the connecting steel plates of the steel arch frame are reinforced by welding.
[0032] Then, rotate the steel arch frame installer to turn the arch foot to the bottom, support the steel arch frame at the survey position, and set the two channel steels on both sides of the web of the steel arch frame a respectively. Tighten the bolts through the waist-shaped holes to clamp the two sides of the web of the steel arch frame a. Rotate the arch frame installer and operate the hydraulic cylinder to tighten the steel arch frame a with the surrounding rock. Adjust the overlap length between the two ends of the channel steel and the steel arch frame a, and pass the bolts through the slide and the steel arch frame a to realize the connection between the channel steel and the steel arch frame a, so that the positions of the channel steel on both sides and the web of the arch frame are locked. Finally, weld reinforcement is used at the positions of the channel steel and the end plate of the arch frame and at the interface of the steel arch frame.
[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0034] The content of this utility model is not limited to the embodiments listed. Any equivalent modifications made by those skilled in the art to the technical solution of this utility model after reading this utility model specification shall be covered by the claims of this utility model.
Claims
1. An adjustment device for the connection of a steel arch frame in a hydraulic tunnel TBM construction, characterized in that: It includes multiple steel arch frames b (9) and two steel arch frames a (1), and the steel arch frames b (9) are fixedly connected to each other; The two steel arch frames a(1) are arranged adjacent to each other, and channel steel (2) is provided on both sides of the web of the steel arch frame a(1); the channel steel (2) is arc-shaped, and a waist-shaped hole (3) is provided on the web of the channel steel (2), and a sliding groove (4) is provided on both sides of the waist-shaped hole (3); The two ends of the channel steel (2) are fixedly connected to the steel arch frame a (1) by the sliding groove (4) and the bolt (7) respectively; the two channel steels (2) are fixedly connected by the waist-shaped hole (3) and the bolt (7); the steel arch frame a (1), the steel arch frame b (9) and the channel steel (2) are closed into a ring.
2. The adjusting device for the connection of the steel arch frame in the construction of a hydraulic tunnel TBM according to claim 1, characterized in that: The two ends of the interconnected steel arch frame b (9) are respectively welded with connecting steel plates (5), the connecting surfaces of the two connecting steel plates (5) overlap, and the connecting steel plates (5) are fixedly connected by bolts (7).
3. The adjusting device for the connection of a steel arch frame in a hydraulic tunnel TBM construction project according to claim 2, characterized in that: The connecting steel plate (5) is provided with bolt holes (6).
4. The adjusting device for the connection of a steel arch frame in a hydraulic tunnel TBM construction project according to claim 3, characterized in that: The steel arch frame a (1) and the steel arch frame b (9) are connected by a connecting steel plate (5) at one end and are fixedly connected by bolts (7).
5. The adjusting device for the connection of a steel arch frame in a hydraulic tunnel TBM construction project according to claim 4, characterized in that: Both the steel arch frame a(1) and the steel arch frame b(9) are I-beams.
6. The adjusting device for the connection of a steel arch frame in a hydraulic tunnel TBM construction project according to claim 5, characterized in that: The connection point of the two connecting steel plates (5) is reinforced by welding.
7. The adjusting device for the connection of a steel arch frame in a hydraulic tunnel TBM construction project according to claim 6, characterized in that: The channel steel (2) is placed between the end plates of the steel arch frame a (1).
8. The adjusting device for the connection of a steel arch frame in a hydraulic tunnel TBM construction project according to claim 7, characterized in that: The web of the channel steel (2) coincides with the web of the steel arch frame a (1), and the end plate of the channel steel (2) coincides with the end plate of the steel arch frame a (1). The channel steel (2) and the web and end plate of the steel arch frame a (1) are reinforced by welding.