Multifunctional steel arch rigid connection deformation control reinforcing device and construction method

Abstract

The application discloses a kind of multifunctional steel arch rigid connection deformation control reinforcing equipment and construction method, equipment includes reinforcing piece, the reinforcing piece is I-shaped, both sides recess can be placed upper layer steel arch and lower layer steel arch respectively, and with upper layer steel arch and lower layer steel arch can be detached and connected.Using the above-mentioned multifunctional steel arch rigid connection deformation control reinforcing equipment, by reinforcing piece as rigid node, it can provide support when installing upper layer steel arch, and then lower layer steel arch is installed again.The assembly efficiency of steel arch is improved, and the construction hidden danger caused by long-term suspension of upper layer steel arch is avoided.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, specifically to a multifunctional steel arch rigid connection deformation control and reinforcement device and construction method. Background Technology

[0002] Steel arch frames are a support measure used to reinforce underground engineering projects. The stiffness of the foundation at the bottom of the steel arch frame plays a crucial role in controlling the deformation of the surrounding rock and improving the stress state of the support structure. In large-section tunnel engineering, since steel arch frames are usually constructed by segmented assembly, it is essential to ensure the stability of the foundation at the bottom of the upper steel arch frame during the excavation of the lower layer of surrounding rock, and to achieve a rapid and reliable connection between the upper and lower steel arch frames to avoid construction safety hazards caused by the upper steel arch frame being suspended for a long period of time.

[0003] Therefore, the foundation stiffness of the steel arch frame is a temporary requirement, necessitating high stiffness during upper-level excavation and easy dismantling during lower-level excavation. Thus, apart from Class II, III, and IV surrounding rock with relatively high stiffness, there is an urgent need for steel arch frame reinforcement and easy dismantling equipment for weak surrounding rock with low natural stiffness, especially for soft rock tunnel projects that are highly sensitive to water, such as altered rock tunnels. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a multifunctional steel arch frame rigid connection deformation control and reinforcement device and construction method, which can quickly assemble steel arch frames and improve installation efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a multifunctional steel arch frame rigid connection deformation control and reinforcement device, including a reinforcement member, the reinforcement member being I-shaped, with grooves on both sides capable of placing the upper steel arch frame and the lower steel arch frame respectively, and being detachably connected to the upper steel arch frame and the lower steel arch frame.

[0006] The reinforcement component is I-shaped, with two grooves corresponding to the vertical direction for installing the upper and lower steel arch frames. During the installation of the upper steel arch frame, the reinforcement component provides stable support. After the upper frame is secured, the lower steel arch frame can be inserted, connecting the upper and lower steel arch frames to form a unified structure.

[0007] The beneficial effects of the aforementioned multifunctional steel arch rigid connection deformation control and reinforcement device are as follows: the reinforcement component, as a rigid node, can provide support during the installation of the upper steel arch, followed by the installation of the lower steel arch. This improves the assembly efficiency of the steel arch and avoids construction hazards caused by the upper steel arch being suspended for a long time.

[0008] Furthermore, the reinforcing component is made of steel.

[0009] Steel has the advantage of high strength and can withstand large loads.

[0010] Furthermore, the reinforcement has mounting holes on both sides that connect the two grooves, allowing bolts to pass through the mounting holes and connect to the upper or lower steel arch frame.

[0011] The upper and lower steel arch frames are connected to the reinforcement components by high-strength bolts, thereby forming a circumferential support system, which can significantly improve the overall rigidity of the structure.

[0012] Furthermore, both sides of the upper or lower steel arch frame are connected to the two sides of the reinforcing member by four bolts arranged in a rectangular array.

[0013] The four rectangular array of bolts can improve the connection and fixation effect between the steel arch frame and the reinforcement.

[0014] Furthermore, both ends of the reinforcing member are provided with reinforcing connection holes, and the two reinforcing members can be connected by bolts and reinforcing connection holes.

[0015] By connecting adjacent reinforcement components with high-strength bolts, longitudinal assembly of the reinforcement components can be achieved to form a longitudinal support system, thereby significantly improving the overall rigidity of the structure.

[0016] A construction method for a multifunctional steel arch rigid connection deformation control and reinforcement device, using any of the aforementioned multifunctional steel arch rigid connection deformation control and reinforcement devices, includes the following steps: When excavating the lower steps of the tunnel, trenches are dug at the foundation positions of the steel arch frames on both sides of the tunnel, and pad blocks are placed in the trenches. Place the reinforcement in the trench, with the lower groove placed on the pad, and connect the upper steel arch to the upper groove of the reinforcement. After the support system is stable, the pad blocks are cleaned, and the lower steel arch frame is connected to the lower groove of the reinforcement component to assemble a complete steel arch frame.

[0017] The beneficial effects of the construction method for the aforementioned multifunctional steel arch rigid connection deformation control reinforcement equipment are as follows: During the excavation of the lower surrounding rock, the reinforcement components serve as a rigid foundation for installing the upper steel arch, forming a rigid node that effectively transfers the load of the upper steel arch to the pad blocks. After the upper steel arch is installed, the lower surrounding rock is excavated, the pad blocks are cleaned, and the lower steel arch is connected to the reinforcement components, thus assembling the steel arch completely.

[0018] Furthermore, the pad is a concrete cube, and its lower groove is placed on the concrete cube when the reinforcement is placed.

[0019] The concrete cube has good strength, which can provide better load-bearing capacity for the reinforcement when installing the upper steel arch frame, and it is also easy to clean and remove when installing the lower steel arch frame.

[0020] Furthermore, drainage tunnels are opened in the sidewalls of the tunnel, and these drainage tunnels are connected to the main drainage system of the tunnel, which is located below the bottom of the trench.

[0021] By setting up drainage holes, water can be drained to prevent water seepage from causing the foundation to soften.

[0022] Furthermore, each reinforcement component is fitted with three steel arch frames to form a circumferential support system.

[0023] Furthermore, multiple reinforcing components can be connected longitudinally in sequence to form a longitudinal support system. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0025] Figure 1 A schematic diagram of a reinforcement component for a multifunctional steel arch rigid connection deformation control and reinforcement device and construction method provided in an embodiment of the present invention; Figure 2 for Figure 1 The diagram shows the connection between the reinforcement components and the upper and lower steel arch frames of a multifunctional steel arch frame rigid connection deformation control reinforcement device and construction method. Figure 3 for Figure 2 The image shows a side view of the connection between the reinforcement component and the upper and lower steel arch frames of a multifunctional steel arch frame rigid connection deformation control reinforcement device and construction method. Figure 4 A schematic diagram of a three-dimensional support network for a multifunctional steel arch rigid connection deformation control and reinforcement device and construction method provided in an embodiment of the present invention; Figure 5 A schematic diagram illustrating the construction and installation of a multifunctional steel arch rigid connection deformation control and reinforcement device and construction method according to an embodiment of the present invention; Figure label: 10-Reinforcing component, 11-Mounting hole, 12-Reinforcing connection hole, 20-Upper steel arch frame, 30-Lower steel arch frame, 40-Padded block. Detailed Implementation

[0026] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0027] Please see Figures 1 to 5This invention provides a multifunctional steel arch frame rigid connection deformation control and reinforcement device and construction method, which can improve the installation efficiency and overall rigidity of the steel arch frame.

[0028] Specifically, such as Figures 1 to 3 As shown, the equipment includes a reinforcement 10, which is a long strip with an I-shaped cross-section. The grooves on both sides can accommodate the upper steel arch frame 20 and the lower steel arch frame 30 respectively, and are detachably connected to the upper steel arch frame 20 and the lower steel arch frame 30.

[0029] The reinforcing member 10 has an I-shaped cross-section, with two grooves corresponding to the upper and lower directions, respectively, for installing the upper steel arch frame 20 and the lower steel arch frame 30. During the installation of the upper steel arch frame 20, the reinforcing member provides stable support. After the upper layer is fixed, the lower steel arch frame 30 can be installed. The reinforcing member acts as a rigid node, connecting the upper steel arch frame 20 and the lower steel arch frame 30 to form a whole. This improves the assembly efficiency of the steel arch frame and avoids the construction hazards caused by the upper steel arch frame 20 being suspended for extended periods.

[0030] Specifically, the reinforcement is made of high-strength steel, which has the advantage of high strength and can withstand large loads.

[0031] Specifically, mounting holes 11 are provided on the upper and lower outer walls of both sides of the reinforcing member 10, connecting to the inner grooves. Bolts can pass through the mounting holes 11 to connect with the upper steel arch frame 20 or the lower steel arch frame 30. High-strength bolts are used to connect the upper and lower steel arch frames to the reinforcing member to meet the load-bearing requirements of the large-section steel arch frame, thereby forming a circumferential support system and significantly improving the overall structural rigidity. In this embodiment, both sides of the upper steel arch frame 20 or the lower steel arch frame 30 are connected to both sides of the reinforcing member 10 by four bolts arranged in a rectangular array. The four rectangular array bolts improve the connection and fixing effect between the steel arch frame and the reinforcing member.

[0032] Specifically, each end of the reinforcing member 10 has four reinforcing connection holes 12, and two reinforcing members 10 can be connected by bolts and reinforcing connection holes 12. By connecting adjacent reinforcing members with high-strength bolts, longitudinal assembly of the reinforcing members can be achieved, forming a stable longitudinal support system, which significantly improves the overall stiffness and stability of the structure.

[0033] By using reinforced fasteners to achieve multi-point rigid connections between the upper and lower steel arch frames, not only can the steel arch frames be quickly assembled, but a stable circumferential and longitudinal support system can also be formed, making it particularly suitable for the segmented installation of steel arch frames in large-section tunnels. Furthermore, all connection points are designed to prevent loosening, ensuring that no loosening will occur during long-term use.

[0034] The construction method employs the aforementioned multifunctional steel arch rigid connection deformation control and reinforcement equipment, including the following steps: When excavating the lower bench of the tunnel, trenches with a width of 1.5 times the width of the reinforcement and a height of 0.7 times the height of the reinforcement are dug at the foundation of the steel arch frame on both sides of the tunnel. 40 pad blocks are densely arranged in the trenches. Place the reinforcement 10 in the groove, and place the pad 40 on the lower groove. Connect the upper steel arch frame 20 to the upper groove of the reinforcement 10. After the support system is stable, the pad block 40 is cleaned, and the lower steel arch frame 30 is connected to the lower groove of the reinforcement 10 to assemble a complete steel arch frame.

[0035] During the excavation of the lower surrounding rock, the reinforcement component 10 serves as a rigid foundation for installing the upper steel arch frame 20, forming a rigid node that effectively transfers the load of the upper steel arch frame 20 to the pad block 40. After the upper steel arch frame 20 is installed, the lower surrounding rock is excavated, the pad block 40 is cleaned, and the lower steel arch frame 30 is connected to the reinforcement component 10 to complete the assembly of the steel arch frame.

[0036] Specifically, such as Figure 4 and Figure 5 As shown, the pad block 40 is a precast concrete cube. When the reinforcement component 10 is placed, its lower groove rests on the concrete cube. The precast concrete cube uses concrete test blocks that have undergone strength testing. Its residual strength is higher than that of ordinary backfill materials, providing better load-bearing capacity for the reinforcement component 10 during the installation of the upper steel arch 20. It also facilitates removal during the installation of the lower steel arch 30, enabling resource recycling. Two to three concrete test blocks can be placed within one reinforcement component, with the gaps filled with high-strength crushed stone to form a dense and stable load-bearing layer. This ensures the rigidity of the foundation, improves material utilization, and effectively disperses the concentrated stress of the steel arch. This structure controls the settlement of the upper steel arch 20 and enhances stability during the excavation stage.

[0037] The reinforcing members are precision cast from high-strength alloy steel, forming an I-shaped elongated structure with an optimized cross-section that ensures load-bearing capacity while achieving lightweight design. Precision-machined reinforcing connection holes 12 are provided at both ends for longitudinal connection and fastening of adjacent reinforcing members 10 using high-strength bolts. Anti-loosening nuts are installed at the connection nodes to ensure long-term stability, thus forming a continuous elongated rigid foundation. The reinforcing members 10 are placed on concrete cube blocks, and the upper steel arch frame 20 is connected to the reinforcing members 10 through mounting holes 11 and bolts, forming rigid nodes that effectively transfer the load of the steel arch frame to the concrete foundation. One reinforcing member 10 connects three steel arch frames, forming a longitudinal rigid connection unit, which, together with the locking anchor pipes, forms a three-dimensional support network (such as...). Figure 5 (As shown).

[0038] Concrete cube test blocks are densely arranged in the trench to form a temporary foundation. First, the multi-functional steel arch frame I-beam connecting reinforcement 10 is placed, and then the upper steel arch frame 20 is placed. The upper steel arch frame 20 and the reinforcement 10 are connected by high-strength bolts. After the support system is stable, the concrete test blocks in the trench are easily cleaned and removed. Then, the lower steel arch frame 30 is placed and connected to it, and the upper and lower steel arch frames are completely assembled.

[0039] In large-section tunnel engineering, the steel arch frame is constructed using segmented assembly. Reinforcing components are installed at the joints between upper and lower steel arch frames. Each reinforcing component 10 has four precisely positioned mounting holes 11 at its connection to the steel arch frame, secured with high-strength bolts and anti-loosening nuts to ensure node rigidity. Adjacent arch frames are then connected by bolts to form a continuous ring-shaped load-bearing structure. This circumferential rigid connection effectively controls tunnel convergence deformation, and allows for efficient and precise docking between the steel arch frame and the reinforcing components.

[0040] The area surrounding the reinforcement components is filled with well-graded backfill soil, compacted in layers to ensure overall stability. Drainage tunnels are also constructed in the tunnel sidewalls, connected to the main tunnel drainage system, which is 20cm below the bottom of the trench. These drainage tunnels, together with the main tunnel drainage system, form a complete drainage system to prevent water seepage and subsequent foundation softening.

[0041] Using the aforementioned multifunctional steel arch rigid connection deformation control reinforcement equipment and construction method, rapid assembly can be achieved, improving installation efficiency and avoiding construction hazards caused by long-term suspension of the upper steel arch. Furthermore, the upper and lower steel arches are rigidly connected circumferentially through reinforcement components, and longitudinally rigidly connected between these components, forming a three-dimensional load-bearing system. This reduces the risk of steel arch subsidence and displacement, making it suitable for tunnel construction in soft surrounding rock conditions. It not only effectively controls initial support deformation but also significantly improves structural durability, providing an innovative solution for safe tunnel construction under complex geological conditions.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A construction method for a multifunctional steel arch rigid connection deformation control and reinforcement device, comprising a reinforcement component, wherein the reinforcement component is I-shaped, with grooves on both sides for placing an upper steel arch and a lower steel arch respectively, and is detachably connected to the upper steel arch and the lower steel arch. The reinforcing component is made of steel; The reinforcement has mounting holes on both sides that connect two grooves, and bolts can pass through the mounting holes to connect with the upper or lower steel arch frame. Both sides of the upper or lower steel arch frame are connected to the two sides of the reinforcement by four bolts arranged in a rectangular array. Both ends of the reinforcing member are provided with reinforcing connection holes, and the two reinforcing members can be connected by bolts and reinforcing connection holes; Its features are, Includes the following steps: When excavating the lower steps of the tunnel, trenches are dug at the foundation positions of the steel arch frames on both sides of the tunnel, and pad blocks are placed in the trenches. Place the reinforcement in the trench, with the lower groove placed on the pad, and connect the upper steel arch to the upper groove of the reinforcement. After the support system is stable, the pad blocks are cleaned, and the lower steel arch frame is connected to the lower groove of the reinforcement component to assemble a complete steel arch frame.

2. The construction method of the multifunctional steel arch frame rigid connection deformation control and reinforcement device according to claim 1, characterized in that, The pad is a concrete cube, and its lower groove is placed on the concrete cube when the reinforcement is placed.

3. The construction method of the multifunctional steel arch frame rigid connection deformation control and reinforcement device according to claim 1, characterized in that, Drainage tunnels are opened in the sidewalls of the tunnel, and these tunnels are connected to the main drainage system of the tunnel, which is located below the bottom of the trench.

4. The construction method of the multifunctional steel arch frame rigid connection deformation control and reinforcement device according to claim 1, characterized in that, Each reinforcement component is fitted with three steel arch frames, forming a circumferential support system.

5. The construction method of the multifunctional steel arch frame rigid connection deformation control and reinforcement device according to claim 1, characterized in that, Multiple reinforcement components can be connected longitudinally in sequence to form a longitudinal support system.

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