A tunnel arch and side wall integrated connection structure

Abstract

This invention provides an integrated connection structure for a tunnel arch and sidewall, relating to the field of tunnel construction technology. It includes a plug rod with a pointed, conical front end and an anchor head at the rear end. The plug rod is inserted into an installation hole located between the arch and the sidewall. The installation hole has an inner annular groove, a middle annular groove, and an outer annular groove formed sequentially along the axial direction. The anchor head has a first deformation portion that deforms after insertion into the installation hole to achieve a locking fit with the inner annular groove. The middle part of the plug rod has a second deformation portion that deforms after insertion into the installation hole to engage with the middle annular groove. The front part of the plug rod has a third deformation portion that deforms after insertion into the installation hole to engage with the outer annular groove. After the plug rod is inserted into the installation hole, the capsule structure is punctured, allowing colloidal material to enter the inner, middle, and outer annular grooves. This invention enables the arch and sidewall to form a stable and reliable integrated structure after assembly, and possesses good construction adaptability.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, and more specifically, to an integrated connection structure between the tunnel arch and the sidewall. Background Technology

[0002] In existing tunnel construction, the integrated cast-in-place structure of the arch and sidewalls is commonly used. While this method improves the overall integrity and continuous load-bearing capacity of the structure by completing the arch and wall in a single pour, it has many limitations in actual construction. Because the tunnel arch is a curved structure and the sidewalls are vertical, the geometric relationship at their junction is complex. The formwork system must simultaneously consider both shape matching and load-bearing stability, placing extremely high demands on formwork installation accuracy, support strength, and construction organization. Especially in large-section tunnels, the significant weight of concrete and pouring pressure often lead to formwork deformation, misalignment, and even localized cracking, resulting in long construction cycles, high costs, and significant challenges in quality control. Furthermore, the integral casting method places strict requirements on site space conditions, limiting the widespread application of mechanized and prefabricated construction methods.

[0003] Therefore, some projects have tried to use prefabricated components for construction, but the connection structure between the arch and the side wall still lacks a reasonable connection form, making it difficult to ensure convenient installation while achieving reliable overall force transmission. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated connection structure for the tunnel arch and sidewalls, which enables the arch and sidewalls to form a stable and reliable integral structure after assembly, and has good construction adaptability.

[0005] This invention is achieved through the following technical solution: An integrated connection structure for the tunnel arch and sidewalls includes: The insertion rod has a pointed cone-shaped front end and an anchor head at the rear end. The insertion rod is used to insert into the mounting hole between the arch and the sidewall, and the pointed cone part at its front end is used to insert into the tunnel sidewall. The mounting hole is formed sequentially along the axial direction by an inner ring groove, a middle ring groove and an outer ring groove, wherein the middle ring groove is prefabricated at the connection joint between the arch and the side wall; The anchor head is provided with a first deformable part, which deforms after being inserted into the mounting hole to achieve a locking fit with the inner annular groove; The middle part of the insertion rod is provided with a second deformable part, which deforms after being inserted into the mounting hole to fit into the middle ring groove; The front part of the insertion rod is provided with a third deformation part, which deforms after being inserted into the mounting hole to fit into the outer ring groove; The capsule structure is disposed on the insert rod. After the insert rod is inserted into the mounting hole, the capsule structure is punctured, and the colloidal substance enters the inner ring groove, the middle ring groove and the outer ring groove.

[0006] Furthermore, the third deformation part includes a spiral deformable piece, and multiple spiral deformable pieces are slidably embedded along the outer circumference of the insert rod. The spiral deformable pieces extend through the front end of the insert rod. A first annular groove is formed at the middle position of the insert rod. A retaining ring is slidably disposed in the first annular groove. There is an movable gap between the inner wall of the retaining ring and the first annular groove. Multiple spiral deformable pieces are fixedly connected to the retaining ring. The retaining ring can move under the drive of the spiral deformable pieces. During its movement, the axis of the retaining ring deviates from the axis of the insert rod and gets stuck in the middle annular groove.

[0007] Furthermore, a sliding sleeve is fitted near the rear end of the insertion rod, and the second deformable part includes a first notch piece. The first notch piece is fixedly disposed on the sliding sleeve and arranged in a double-layered deformable outer ring and deformable inner ring along the circumference. A sliding post is slidably disposed at the rear end of the insertion rod. The sliding post is connected to the sliding sleeve through a bracket. A receiving groove is provided inside the insertion rod for the sliding post and the bracket to slide.

[0008] Furthermore, the sliding column and the rear end of the insertion rod are recessed; And / or, a sliding groove is provided near the rear end of the insertion rod, and the sliding sleeve is slidably connected in the sliding groove, with the outer wall of the sliding sleeve being flush with the outer wall of the insertion rod; And / or, the radial distance from the inner wall of the first annular groove to the center of the insertion rod is less than the radial distance from the inner wall of the sliding groove to the center of the insertion rod; And / or, the insert has multiple glue holes along the axial direction that connect the receiving groove and the front end of the insert.

[0009] Furthermore, the second deformable part also includes a second deformable ring piece, which is fixedly disposed on the side of the retaining ring away from the spiral deformable piece. The capsule structure includes a first structural adhesive bladder, which is sleeved in the first ring groove and fitted to the second deformable ring piece.

[0010] Furthermore, the first deformable part includes a plurality of deformable bodies arranged circumferentially along the anchor head. The insertion end of the deformable body is provided with a guide slope near the inner side of the insertion rod. A deformable cavity is opened in the middle of the deformable body. The outer side of the deformable body is arched.

[0011] Furthermore, the capsule structure also includes a second structural adhesive bladder, which is sleeved on the sliding groove near the anchor head and fits against the inner side of the deformable body. The anchor head includes a sealing plate, the outer wall of which fits against the inner wall of the inner ring groove.

[0012] Furthermore, the spiral deformable sheet has an arched portion near its front end; And / or, an overflow groove is provided on the inner side of the spiral deformable sheet along the length direction; And / or, the outer wall of the spiral deformable piece near the position where it connects to the retaining ring has an arc-shaped groove.

[0013] Furthermore, it also includes a first annular piece, which is coaxially disposed within the outer annular groove. Multiple top pieces are disposed circumferentially on the inner side of the first annular piece. The top pieces are used to push out the spiral deformable piece, and the top pieces are disposed at an angle towards the inner side of the tunnel.

[0014] Furthermore, a second ring piece is provided at a distance from the first ring piece, and a plurality of elastic arc plates are provided between the second ring piece and the first ring piece. The second ring piece is used to be installed on the bottom wall of the outer ring groove.

[0015] The technical solution of the present invention has at least the following advantages and beneficial effects: 1. This invention, by incorporating multi-stage deformation sections and corresponding annular groove structures on the insertion rod, enables the rod to sequentially form a reliable snap-fit ​​and locking connection with the inner, middle, and outer annular grooves after insertion into the mounting hole, achieving a multi-point stable connection between the arch and the sidewall. This design not only improves the overall rigidity and stress uniformity of the precast components after assembly but also effectively prevents problems such as loosening, misalignment, and weak connections that are prone to occur in traditional single-point connection structures. The pointed conical structure at the front end of the insertion rod facilitates automatic guidance, positioning, and insertion into the tunnel sidewall during assembly, ensuring accurate insertion angles and a stable connection with the tunnel sidewall, thereby improving the convenience and precision of construction assembly.

[0016] 2. This invention utilizes a capsule structure on the insert rod. When the insert rod is inserted into the mounting hole, it is punctured, allowing a colloidal substance to flow into the annular grooves. This further enhances the contact density and pull-out resistance between the insert rod and the annular grooves, thereby improving the overall stability and durability of the connection. This structural design avoids complex on-site casting procedures, making it suitable for the rapid assembly and construction of prefabricated tunnel structures. It significantly reduces the difficulty of formwork and casting, and improves construction efficiency and quality control capabilities. Attached Figure Description

[0017] Figure 1 This invention aims to illustrate the structural diagram of the arch and sidewalls installed after the tunnel is completed; Figure 2This invention aims to demonstrate a partial schematic diagram of an integrated connection structure between the tunnel arch and the sidewall, installed behind the arch and the sidewall; Figure 3 for Figure 2 Enlarged view of section A; Figure 4 This invention aims to demonstrate a structural schematic diagram of an integrated connection structure between the tunnel arch and the sidewall, and the mounting holes; Figure 5 This invention aims to demonstrate an overall structural schematic diagram of an integrated connection structure between the tunnel arch and the sidewall; Figure 6 This invention aims to demonstrate an exploded view of an integrated connection structure between the tunnel arch and the sidewall; Figure 7 This invention aims to illustrate the structural diagrams of the sliding sleeve, the first notch piece, the sliding column, and the bracket; Reference numerals: 100-insertion rod, 110-anchor head, 111-sealing plate, 120-first annular groove, 121-retaining ring, 130-sliding sleeve, 131-sliding groove, 140-sliding column, 145-receiving groove, 150-bracket, 160-glue hole, 200-first deformable part, 210-deformable body, 211-guide slope, 212-deformation cavity, 300-second deformable part, 310-first notch piece, 311-deformable outer ring, 312-deformable inner ring, 320-second deformable ring piece. 400-Third deformation section, 410-Helical deformation piece, 411-Arch-shaped section, 412-Overflow groove, 413-Arc-shaped groove, 500-Capsule structure, 510-First structural glue bladder, 520-Second structural glue bladder, 600-First ring piece, 610-Top piece, 620-Second ring piece, 630-Elastic arc plate, 700-Arch, 710-Side wall, 711-Connecting seam, 720-Mounting hole, 721-Inner ring groove, 722-Middle ring groove, 723-Outer ring groove, 730-Bevel angle. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] The following is for reference Figures 1-7 As shown in the figure, and further illustrated in the specific embodiments, an integrated connection structure for a tunnel arch and sidewall includes a rod 100. The front end of the rod 100 is set in a pointed cone shape, and the rear end is provided with an anchor head 110. The rod 100 is used to insert into the mounting hole 720 set between the arch 700 and the sidewall 710. The pointed cone part at its front end is used to insert into the tunnel sidewall. After being inserted into the tunnel sidewall, it increases the connection with the tunnel sidewall.

[0021] In practical implementation, the pointed cone portion can be hardened or coated with a high-strength alloy layer to improve penetration and reduce scratching and jamming during construction. The cone angle and length can be designed according to the material and thickness of the tunnel sidewall, with a cone angle typically selected within the range of 15° to 30° to balance guidance and self-locking. The overall material of the insert rod 100 should preferably be high-strength alloy steel or corrosion-resistant stainless steel, and the surface can be galvanized or coated with a polymer to prevent corrosion after long-term exposure. During installation, the insert rod 100 can be aligned with the mounting hole 720 and then inserted by impact or pressure. The pointed cone shape can automatically guide the insertion process and reduce positioning errors, thereby improving on-site assembly efficiency and accuracy.

[0022] It should be noted that the arch 700 and the side wall 710 are interlocking structures. The mounting hole 720 between the arch 700 and the side wall 710 is prefabricated, and it has an inner annular groove 721, a middle annular groove 722, and an outer annular groove 723 formed sequentially along the axial direction. The middle annular groove 722 is prefabricated at the connection joint 711 between the arch 700 and the side wall 710 and is also opened on the arch 700 and the side wall 710. The integrated connection structure of the arch 700 and the side wall 710 in this application needs to be used in conjunction with the special structure of the mounting hole 720. The mounting hole 720 is processed before the prefabricated component leaves the factory. The geometric dimensions, tolerances, and relative positions of the annular grooves should be determined and recorded during mold design to ensure the precise fit between the annular grooves and the deformed parts of the insert rod 100 during on-site assembly.

[0023] In different embodiments, the inner wall of the annular groove may be locally reinforced or have pre-drilled holes for sealing / adhesive materials to facilitate subsequent colloid injection or seal embedding, ensuring pull-out and shear resistance after installation.

[0024] Reference Figures 3-5As shown, the anchor head 110 is provided with a first deformation part 200. After being inserted into the mounting hole 720, the first deformation part 200 deforms to achieve a locking fit with the inner ring groove 721. In different embodiments, the first deformation part 200 can be constructed as a multi-piece or annular thin-walled deformable body 210. The insertion end of the deformable body 210 should be designed with a guide bevel 211 to facilitate smooth entry into the inner ring groove 721. The deformation cavity 212 and the arched appearance are conducive to generating controlled plastic deformation under pressure or lateral force and forming a close fit with the inner ring groove 721. The deformation material can be a metal alloy with moderate ductility. If necessary, a pre-folded line or pre-cut groove can be provided inside the deformable body 210 to control the deformation position and shape, thereby ensuring uniform load-bearing after deformation and reducing stress concentration. After achieving locking, the first deformation part 200 can also be used in conjunction with the injection of colloid to further improve the tightness and prevent fretting and long-term relaxation.

[0025] The insertion rod 100 has a second deformable part 300 in its middle. After being inserted into the mounting hole 720, the second deformable part 300 deforms to engage with the middle ring groove 722. The arrangement of the second deformable part 300 corresponds to the prefabricated position of the middle ring groove 722, and the tolerance matching of the insertion depth of the insertion rod 100 should be considered. The second deformable part 300 can be a combination of two-layer deformable rings (deformable outer ring 311 and deformable inner ring 312), and the deformation action can be achieved by the drive of the sliding sleeve 130 and the sliding column 140, thereby inducing controllable deformation on site through simple external force or prefabricated drive mechanism. To improve shear and pull-out resistance, the material of the second deformable part 300 should have a high plastic deformation capacity, and irregular cuts or notches can be designed on the deformable ring to form a stronger interlocking surface and mechanical locking effect.

[0026] The front part of the insertion rod 100 is provided with a third deformation part 400, which deforms after being inserted into the mounting hole 720 to engage with the outer ring groove 723. (Refer to...) Figure 5 As shown, the third deformation section 400 preferably takes the form of a spiral deformable piece 410. Multiple spiral deformable pieces 410 are slidably embedded along the outer periphery of the insert rod 100 and extend through the front end of the insert rod 100. After abutting against the tunnel sidewall and being subjected to force, the spiral deformable piece 410 is lifted and curled. This curling action causes the deformable piece to curl into the outer annular groove 723, achieving mechanical engagement on the outer side. An overflow groove 412 can be formed along the length of the spiral deformable piece 410 to allow the adhesive to quickly seep into the three annular grooves, achieving both mechanical locking and structural bonding. The cross-section, width, and pre-bending angle of the spiral deformable piece 410 should be optimized according to the width of the outer annular groove 723 and the rigidity of the tunnel sidewall to ensure that sufficient deformation energy is generated during deformation without premature breakage.

[0027] The capsule structure 500 is mounted on the insertion rod 100. After the insertion rod 100 is inserted into the mounting hole 720, the capsule structure 500 is punctured, and the colloidal substance enters the inner ring groove 721, the middle ring groove 722, and the outer ring groove 723. The capsule structure 500 can be divided into two parts: a first structural adhesive bladder 510 and a second structural adhesive bladder 520, which are respectively fitted into the first ring groove 120 and the position near the sliding groove 131. The capsule is filled with high-strength structural adhesive (such as epoxy modified adhesive or polyurethane high-strength adhesive). After insertion and triggering puncture, the adhesive flows into each ring groove along the preset channel or the connecting receiving groove 145 and forms an adhesive layer with the inner wall of the ring groove and the insertion rod 100. To ensure sufficient distribution of the adhesive, multiple connecting receiving grooves 145 are opened axially inside the insertion rod 100, which are connected to the adhesive hole 160 at the front end of the insertion rod 100. The rupture of the adhesive bladder can be completed by the puncture of the deformable part, the relative displacement of the sliding sleeve 130, or the drive of the special punch.

[0028] Reference Figure 3 and Figure 6 As shown, specifically, the third deformable part 400 includes a spiral deformable piece 410, which extends through the front end of the insertion rod 100 and is fixedly connected to a retaining ring 121. The retaining ring 121 is slidably disposed within a first annular groove 120 opened in the middle of the insertion rod 100, and there is an movable gap between the inner wall of the retaining ring 121 and the first annular groove 120. Under the drive of the spiral deformable piece 410, the retaining ring 121 can move along the axial direction of the insertion rod 100, and during the movement, due to geometric constraints, eccentricity occurs, causing the axis of the retaining ring 121 to deviate relative to the axis of the insertion rod 100, thereby engaging in the middle annular groove 722. To ensure reliable conversion of the retaining ring 121, the movable gap between the first ring groove 120 and the retaining ring 121 needs to be designed within a certain range (e.g., 2cm to 3cm) to provide eccentric space while preventing accidental displacement of the retaining ring 121 during transportation or insertion. The material of the retaining ring 121 should have sufficient rigidity and a certain degree of elasticity so that it remains in contact after eccentric locking.

[0029] Reference Figure 3As shown, a sliding sleeve 130 is fitted near the rear end of the insertion rod 100. The second deformation part 300 includes a first notch piece 310, which is fixedly mounted on the sliding sleeve 130 and arranged circumferentially as a double-layered outer deformation ring 311 and an inner deformation ring 312. A sliding post 140 is provided at the rear end of the insertion rod 100 and is recessed to prevent accidental contact. The sliding post 140 is connected to the sliding sleeve 130 through a bracket 150. Driven by the sliding post 140, the sliding sleeve 130 causes the first notch piece 310 to undergo radial or irregular deformation. The double-layered outer deformation ring 311 and inner deformation ring 312 form a more complex deformation shape due to their interaction, thereby producing a stronger mechanical interlocking effect. The sliding post 140 and the sliding sleeve 130 can be driven by manual pulling, hydraulic pushing, or a mechanical cam mechanism, and can be designed to allow driving only after the insertion rod 100 is fully in place, in order to improve construction safety and reliability.

[0030] As an optional embodiment, a sliding groove 131 is provided near the rear end of the insertion rod 100, and a sliding sleeve 130 is slidably connected within the sliding groove 131. The outer wall of the sliding sleeve 130 is flush with the outer wall of the insertion rod 100. This ensures that the insertion rod 100 has a continuous and smooth shape when inserted into the mounting hole 720, avoiding jamming. The fit tolerance between the sliding groove 131 and the sliding sleeve 130 should be controlled within the sliding range. The material of the sliding sleeve 130 can be a wear-resistant alloy or engineering plastic to reduce frictional resistance and facilitate repeated use. The flush setting also facilitates the insertion rod 100 passing through narrow channels or template openings as a whole.

[0031] As an optional embodiment, the radial distance from the inner wall of the first annular groove 120 to the center of the insertion rod 100 is smaller than the radial distance from the inner wall of the sliding groove 131 to the center of the insertion rod 100. This provides sufficient curling space for the deformable outer ring 311 and the deformable inner ring 312, facilitating irregular deformation and curling. This structural difference is achieved through dimensional design—the smaller radial distance at the annular groove makes subsequent eccentric engagement more effective, while the larger radial distance of the sliding groove 131 provides the necessary space for the unfolding of the deformable body 210 and the flow of the colloid, thereby ensuring that the deformable body 210 has sufficient deformation margin without affecting insertion.

[0032] Specifically, the second deformable part 300 also includes a second deformable ring 320, which is fixedly disposed on the side of the retaining ring 121 away from the spiral deformable piece 410. The second deformable ring 320 is fitted against the first structural adhesive bladder 510. Driven by the sliding column 140, the first notch piece 310 will drive and puncture the first structural adhesive bladder 510, causing the structural adhesive to spread along a predetermined path and form an adhesive layer with the second deformable ring 320 and the inner wall of the ring groove, thereby achieving a dual locking of mechanical interlocking and adhesive bonding. The adhesives used in both the first structural adhesive bladder 510 and the second structural adhesive bladder 520 are high-viscosity, high-shear-strength structural adhesives to ensure that they can withstand long-term loads and environmental influences after curing.

[0033] Reference Figure 3 and Figure 6 As shown, the first deformation section 200 includes multiple deformable bodies 210 arranged circumferentially along the anchor head 110. The insertion end of each deformable body 210 has a guide slope 211 near the inner side of the insertion rod 100. Each deformable body 210 has a deformation cavity 212 in its center and an arched outer shape. This geometry allows the deformable body 210 to effectively flatten and fill after entering the inner annular groove 721, increasing the contact area with the inner annular groove 721 and dispersing stress, thus enhancing pull-out resistance. When designing the deformable body 210, pre-break lines or extension grooves can be considered to control the deformation mode, and the selection of materials (such as low-alloy high-ductility steel) can ensure that plastic forming is completed under the expected load without brittle fracture.

[0034] The capsule structure 500 also includes a second structural adhesive bladder 520. The second structural adhesive bladder 520 is fitted onto the sliding groove 131 near the anchor head 110 and is attached to the inner side of the deformable body 210. After the deformable body 210 is inserted into the inner ring groove 721 and deforms, it can puncture the second structural adhesive bladder 520. The anchor head 110 includes a sealing plate 111. The outer wall of the sealing plate 111 is attached to the inner wall of the inner ring groove 721 to prevent adhesive leakage. The sealing plate 111 can be made of an elastic material and integrally formed on the outer edge of the anchor head 110. It plays a guiding and sealing role during the adhesive flow stage. The fitting tolerance between the sealing plate 111 and the inner ring groove 721 needs to be precisely controlled to achieve a sealing effect without excessive obstruction.

[0035] Reference Figure 6As shown, the spiral deformable piece 410 has an arched portion 411 near its front end to enhance its deformation capacity. After the insertion rod 100 is inserted into the mounting hole 720, the arched portion 411 irregularly curls and deforms within the outer ring groove 723 to achieve a secure fit. An overflow groove 412 is provided along the length of the inner side of the spiral deformable piece 410 to allow adhesive to smoothly penetrate the inner ring groove 721, middle ring groove 722, and outer ring groove 723. To prevent the spiral deformable piece 410 from prematurely curling in the middle ring groove 722 or inner ring groove 721, a chamfered angle 730 is provided at the contact point between the inner ring groove 721 and the middle ring groove 722 and the insertion rod 100 on the side of the inner ring groove 721 and middle ring groove 722 closest to the tunnel sidewall. This chamfer guides the arched portion 411 of the spiral deformable piece 410 to curl towards the outer ring groove 723, thereby ensuring the final curling position and locking effect.

[0036] In addition, the combination of multiple deformable parts and adhesive can achieve a synergistic load-bearing effect of mechanical interlocking and bonding, significantly improving the pull-out resistance, shear resistance and fatigue resistance of the connection.

[0037] As an optional embodiment, the outer wall of the spiral deformable piece 410 near the connecting ring 121 is provided with an arc-shaped groove 413 so that the ring 121 can more smoothly generate eccentric movement in the first ring groove 120 and be engaged in the middle ring groove 722, thereby improving the reliability and repeatability of the engagement action.

[0038] Reference Figure 3 and Figure 5 As shown, the integrated connection structure between the tunnel arch 700 and the sidewall 710 also includes a first ring plate 600. The first ring plate 600 is coaxially arranged in the outer ring groove 723 and has multiple inclined top plates 610 along its inner circumferential direction facing the inner side of the tunnel. The top plates 610 are used to push out the front end of the spiral deformable piece 410 after the insertion rod 100 is inserted. The top plates 610 deform to achieve a lifting action, causing the spiral deformable piece 410 to curl up in the outer ring groove 723 and be fastened. The first ring plate 600 and the second ring plate 620 are spaced apart by multiple elastic arc plates 630. The elastic arc plates 630 can deform and recover during installation, providing preload force between the two ring plates. The second ring plate 620 is used to install on the bottom wall of the outer ring groove 723, which makes the installation, positioning and disassembly of the ring plates more convenient and facilitates factory pre-assembly. The overall design is conducive to rapid on-site assembly and subsequent maintenance and disassembly.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An integrated connection structure between the tunnel arch and the sidewall, characterized in that, include: Insert rod (100), the front end of the insert rod (100) is set in a pointed cone shape, and the rear end is provided with an anchor head (110). The insert rod (100) is used to insert into the mounting hole (720) set between the arch (700) and the side wall (710), and the pointed cone part at its front end is used to insert into the tunnel side wall. The mounting hole (720) is formed in sequence along the axial direction by an inner ring groove (721), a middle ring groove (722) and an outer ring groove (723), wherein the middle ring groove (722) is prefabricated at the connection joint (711) between the arch (700) and the side wall (710); The anchor head (110) is provided with a first deformation part (200), which deforms after being inserted into the mounting hole (720) to achieve a locking fit with the inner ring groove (721); The insertion rod (100) is provided with a second deformation part (300) in the middle. After the second deformation part (300) is inserted into the mounting hole (720), it deforms to fit into the middle ring groove (722). The front part of the insertion rod (100) is provided with a third deformation part (400), which deforms after being inserted into the mounting hole (720) to fit into the outer ring groove (723); A capsule structure (500) is disposed on the insert rod (100). After the insert rod (100) is inserted into the mounting hole (720), the capsule structure (500) is punctured, and the colloidal substance enters the inner ring groove (721), the middle ring groove (722) and the outer ring groove (723).

2. The integrated connection structure between the tunnel arch and the sidewall according to claim 1, characterized in that, The third deformable part (400) includes a spiral deformable piece (410). Multiple spiral deformable pieces (410) are slidably embedded along the outer periphery of the insert rod (100). The spiral deformable pieces (410) extend through the front end of the insert rod (100). A first annular groove (120) is provided at the middle position of the insert rod (100). A retaining ring (121) is slidably disposed in the first annular groove (120). There is an movable gap between the inner wall of the retaining ring (121) and the first annular groove (120). Multiple spiral deformable pieces (410) are fixedly connected to the retaining ring (121). The retaining ring (121) can move under the drive of the spiral deformable pieces (410). During its movement, the axis of the retaining ring (121) deviates from the axis of the insert rod (100) and is locked into the middle annular groove (722).

3. The integrated connection structure between the tunnel arch and the sidewall according to claim 2, characterized in that, The insertion rod (100) is fitted with a sliding sleeve (130) near its rear end. The second deformable part (300) includes a first notch piece (310). The first notch piece (310) is fixedly disposed on the sliding sleeve (130) and arranged in a double-layered deformable outer ring (311) and deformable inner ring (312) along the circumferential direction. A sliding post (140) is slidably disposed at the rear end of the insertion rod (100). The sliding post (140) is connected to the sliding sleeve (130) through a bracket (150). A receiving groove (145) is provided in the insertion rod (100) for the sliding post (140) and the bracket (150) to slide.

4. The integrated connection structure between the tunnel arch and the sidewall according to claim 3, characterized in that, The sliding column (140) and the rear end of the insertion rod (100) are recessed; And / or, a sliding groove (131) is provided near the rear end of the insertion rod (100), and the sliding sleeve (130) is slidably connected in the sliding groove (131), with the outer wall of the sliding sleeve (130) being flush with the outer wall of the insertion rod (100); And / or, the radial distance from the inner wall of the first annular groove (120) to the center of the insertion rod (100) is less than the radial distance from the inner wall of the sliding groove (131) to the center of the insertion rod (100); And / or, the insert (100) has a plurality of glue holes (160) in the axial direction that connect the receiving groove (145) and the front end of the insert (100).

5. The integrated connection structure between the tunnel arch and the sidewall according to claim 3, characterized in that, The second deformable part (300) further includes a second deformable ring piece (320), which is fixedly disposed on the side of the retaining ring (121) away from the spiral deformable piece (410). The capsule structure (500) includes a first structural adhesive bladder (510), which is sleeved in the first ring groove (120) and fitted to the second deformable ring piece (320).

6. The integrated connection structure between the tunnel arch and the sidewall according to claim 4, characterized in that, The first deformable part (200) includes a plurality of deformable bodies (210) arranged circumferentially along the anchor head (110). The insertion end of the deformable body (210) is provided with a guide slope (211) near the inner side of the insertion rod (100). A deformable cavity (212) is opened in the middle of the deformable body (210). The outer side of the deformable body (210) is arched.

7. The integrated connection structure between the tunnel arch and the sidewall according to claim 6, characterized in that, The capsule structure (500) further includes a second structural adhesive bladder (520), which is sleeved on the sliding groove (131) near the anchor head (110) and fits against the inner side of the deformable body (210). The anchor head (110) includes a sealing plate (111), the outer wall of which fits against the inner wall of the inner ring groove (721).

8. The integrated connection structure between the tunnel arch and the sidewall according to claim 2, characterized in that, The spiral deformable piece (410) has an arched part (411) near the front end; And / or, the inner side of the spiral deformable piece (410) is provided with an overflow groove (412) along the length direction; And / or, the outer wall of the spiral deformable piece (410) near the position where it connects to the retaining ring (121) has an arc-shaped groove (413).

9. The integrated connection structure between the tunnel arch and the sidewall according to claim 2, characterized in that, It also includes a first ring piece (600), which is coaxially disposed in the outer ring groove (723). The inner side of the first ring piece (600) is provided with a plurality of top pieces (610) along the circumferential direction. The top pieces (610) are used to push out the spiral deformable piece (410). The top pieces (610) are inclined towards the inner side of the tunnel.

10. The integrated connection structure between the tunnel arch and the sidewall according to claim 9, characterized in that, A second ring piece (620) is provided at a distance from the first ring piece (600), and a plurality of elastic arc plates (630) are provided between the second ring piece (620) and the first ring piece (600). The second ring piece (620) is used to be installed on the bottom wall of the outer ring groove (723).

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