Anti-arching supporting device for subgrade tunnel construction

Abstract

The application provides an anti-upwarping supporting device for subgrade tunnel construction and relates to the technical field of subgrade tunnel supporting. The anti-upwarping supporting device comprises an inverted arch steel frame part, a pulling control element is installed on the inverted arch steel frame part, the inverted arch steel frame part is an integral I-beam bending structure, an inverted arch ground-contacting element is arranged above the pulling control element, two rows of anchoring locks are installed on the inverted arch ground-contacting element, elastic supporting elements are respectively installed on the two rows of anchoring locks, the elastic supporting elements are used for checking anchoring strength, grouting auxiliary elements are installed on the inverted arch ground-contacting element, the steel arch frame is an integral I-beam structure, the supporting strength can be ensured, the pulling control element can be used for adjusting the two ends of the steel arch frame, and the steel arch frame can be conveniently transported into the tunnel, so that the problems of complicated splicing and installation of the anti-upwarping supporting device for subgrade tunnel construction, low structural strength and inconvenient reduction of initial anchoring failure rate are solved.

Description

Technical Field

[0001] This invention relates to the field of roadbed tunnel support technology, and in particular to an anti-arching support device for roadbed tunnel construction. Background Technology

[0002] In the field of transportation infrastructure construction, roadbed tunnels, as core structures that traverse mountains and adapt to complex terrain, directly determine the safety, smoothness, and durability of subsequent routes through their construction quality. Affected by adverse geological conditions, the roadbed soil is prone to expansion or local subsidence due to changes in humidity, leading to frequent occurrences of roadbed arching during operation. Therefore, it is necessary to use support structures for reinforcement during the construction phase. Currently, the anti-arching support devices used in roadbed tunnel construction usually employ steel arch frames for support, combined with anchoring structures for roadbed reinforcement. However, traditional steel arch frames are usually multi-segment spliced ​​structures to facilitate transportation into the tunnel, which is cumbersome to assemble on-site. At the same time, the structural strength is low, making it difficult to achieve the overall transportation and installation of integrated steel arch frames. Furthermore, during actual roadbed anchoring work, especially in soft terrain, it is not easy to reduce the initial anchoring failure rate. A large number of anchor rods are prone to affecting the subsequent grouting quality due to insufficient initial anchoring, resulting in initial anchoring failure, increasing construction safety hazards, and making hole cleaning more difficult. Summary of the Invention

[0003] This disclosure relates to an anti-arching support device for roadbed tunnel construction, which solves the problems of cumbersome splicing and installation, low structural strength, and difficulty in reducing the initial anchorage failure rate of current anti-arching support devices for roadbed tunnel construction.

[0004] In a first aspect, this disclosure provides an anti-arching support device for roadbed tunnel construction, specifically comprising an anti-arch steel frame section, on which a tension control component is installed; the anti-arch steel frame section is an integrally bent I-beam structure; an anti-arch ground-fitting component is provided above the tension control component; two rows of anchoring locks are installed on the anti-arch ground-fitting component; elastic support components are respectively installed on the two rows of anchoring locks; the elastic support components are used to test the anchoring strength; grouting auxiliary components are installed on the anti-arch ground-fitting component; the anti-arch steel frame section includes: a steel arch frame, anchoring holes, and end plates, wherein the steel arch frame is an I-beam bent structure; anchoring holes are respectively opened on both sides of the steel arch frame; end plates are respectively fixedly installed at both ends of the steel arch frame, and four through holes are respectively opened on the two end plates.

[0005] In at least some embodiments, the anti-arch steel frame further includes: a connecting shaft and a positioning stud, with the connecting shaft rotatably mounted on each of the two end plates; the connecting shaft has a through hole; the top of the steel arch frame is threadedly connected to the positioning stud, and the top of the positioning stud has a tapered structure.

[0006] In at least some embodiments, the traction control component includes: a traction connecting column, a traction steel wire, and a threaded connecting cylinder. Two traction connecting columns are provided, and the two traction connecting columns are respectively inserted into two connecting shafts. One end of the traction steel wire is fixedly installed on the traction connecting column on the left side. The other end of the traction steel wire is fixedly installed with a threaded connecting cylinder. The inner side of the threaded connecting cylinder is provided with threads.

[0007] In at least some embodiments, the traction control component further includes: a connecting screw, which is fixedly installed on the traction connecting column on the right side; the connecting screw is provided with a hexagonal block; the threaded connecting cylinder is provided with a hexagonal groove; the connecting screw is threadedly connected to the threaded connecting cylinder; the connecting screw is used to pull the elastic contraction of the steel arch frame.

[0008] In at least some embodiments, the anti-arch ground-mounting component includes: a ground-mounting plate, a grouting pipe, and anchoring connecting arms. The ground-mounting plate is located above the traction steel wire. A grouting pipe is fixedly installed on the top of the ground-mounting plate, and the grouting pipe has threads on its outer side. Anchoring connecting arms are fixedly installed on both sides of the ground-mounting plate, and each of the two anchoring connecting arms has a through hole. The two anchoring connecting arms are respectively attached to the inner side of the steel arch frame. The through holes on the two anchoring connecting arms are respectively aligned with two anchoring holes.

[0009] In at least some embodiments, the anchoring lock includes: an anchoring mounting cylinder and a compression spring, wherein the anchoring mounting cylinder is fixedly mounted on the floor; and the compression spring is sleeved on the anchoring mounting cylinder.

[0010] In at least some embodiments, the anchoring lock further includes: compression springs and one-way positioning blocks; two compression springs are fixedly installed inside the anchoring mounting cylinder; two one-way positioning blocks are rotatably installed inside the anchoring mounting cylinder, and the ends of the two one-way positioning blocks are respectively ratchet-shaped structures; the inner sides of the two one-way positioning blocks are respectively fixedly installed at the ends of the two compression springs; the two compression springs are respectively V-shaped structures.

[0011] In at least some embodiments, the elastic support includes: an elastic sleeve and a limiting ring; the elastic sleeve has a through hole in the middle; the elastic sleeve is slidably sleeved on the anchoring mounting cylinder; the outer bottom surface of the elastic sleeve has a beveled structure; the elastic sleeve is located inside the compression spring; one end of the compression spring is fixedly connected to the elastic sleeve, and the other end of the compression spring is fixedly connected to the anchoring mounting cylinder; a limiting ring is provided on the elastic sleeve; and a one-way positioning block is used to engage the limiting ring.

[0012] In at least some embodiments, the grouting auxiliary component includes: a height-adapting shell, a filling anti-slip groove, and an inner sleeve. The height-adapting shell is threadedly connected to the grouting pipe. Two rings of filling anti-slip grooves are formed on the outer side of the height-adapting shell. An inner sleeve is fixedly installed on the inner side of the height-adapting shell. The inner sleeve is located inside the grouting pipe.

[0013] In at least some embodiments, the grouting auxiliary component further includes: an anti-clogging stud, the anti-clogging stud being threadedly connected inside the inner sleeve; the end of the anti-clogging stud passing through the inner sleeve.

[0014] This invention provides an anti-arching support device for roadbed tunnel construction, which has the following beneficial effects:

[0015] The steel arch frame in this invention is an integrated I-beam structure, which can ensure the support strength, eliminate the need for segmented assembly, and avoid the cumbersome operation caused by segmented assembly. With the help of the tension control components, it can be used to adjust the two ends of the tension steel arch frame. Under the premise of ensuring that the steel arch frame is an integrated structure, it can be easily transported into the tunnel without being blocked by the installed steel arch frame. The operation is simple and can be quickly adjusted by utilizing the elastic deformation of the large steel arch frame itself.

[0016] Furthermore, the use of anti-arch ground-attaching components in conjunction with grouting anchors can improve the anti-arching effect of the roadbed. The use of anchor locking and elastic support components can be used to test the initial tension of the anchors. The initial tension strength of the anchors can be tested by over-pressure, which reduces the failure rate of subsequent anchor grouting. With the help of unidirectional positioning blocks, the elastic sleeve can be automatically limited after the anchor strength is tested by over-tensioning, which makes it easy to adjust and reduce the pressure on the anchors, ensuring that subsequent pressurized grouting operations can be carried out normally, and avoiding the grouting pressure and the elastic force of the pressure spring acting on the expansion head of the anchor.

[0017] In addition, the height-adaptive shell makes it easy to adjust the height to fit the paved concrete pavement. At the same time, the inner sleeve makes it easy to carry out grouting reinforcement work when the pavement becomes hollow after the tunnel subgrade is used. There is no need to drill holes in the concrete pavement during grouting, which avoids damage to the concrete pavement with rebar. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram:

[0021] Figure 1 This invention provides a schematic diagram of the overall structure of an anti-arching support device for roadbed tunnel construction.

[0022] Figure 2 This invention provides a schematic diagram of the bottom structure of an anti-arching support device for roadbed tunnel construction.

[0023] Figure 3 This application shows Figure 2 Enlarged view of the structure of region A in the middle;

[0024] Figure 4 This application shows Figure 2 Enlarged view of the structure of region B in the middle;

[0025] Figure 5 A schematic diagram of the tension control component structure of this application is shown;

[0026] Figure 6 A schematic diagram of the anti-arch ground-attaching component structure of this application is shown;

[0027] Figure 7 This application shows Figure 6 Enlarged view of the structure of region C in the middle;

[0028] Figure 8 A schematic diagram of the elastic support structure of this application is shown;

[0029] Figure 9 A cross-sectional view of the grouting auxiliary component of this application is shown when it is placed in the tunnel subgrade;

[0030] Figure 10 A schematic diagram of the grouting auxiliary component structure of this application is shown.

[0031] List of reference numerals

[0032] 1. Anti-arch steel frame section; 101. Steel arch frame; 102. Anchor hole; 103. End plate; 104. Connecting shaft; 105. Positioning stud; 2. Pull control component; 201. Pull connecting column; 202. Pulling wire; 203. Threaded connecting cylinder; 204. Connecting screw; 3. Anti-arch ground contact component; 301. Ground contact; 302. Grouting pipe; 303. Anchoring connecting arm; 4. Anchoring lock; 401. Anchoring installation cylinder; 402. Compression spring; 403. Compression spring; 404. One-way positioning block; 5. Elastic support component; 501. Elastic sleeve; 5011. Limiting ring; 6. Grouting auxiliary component; 601. Height adaptation shell; 6011. Filling anti-slip groove; 6012. Inner sleeve; 602. Anti-clogging stud. Detailed Implementation

[0033] 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, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figures 1 to 10 :

[0035] This invention proposes an anti-arching support device for roadbed tunnel construction, comprising an anti-arch steel frame 1, on which a tension control component 2 is installed; the anti-arch steel frame 1 is an integral bent I-beam structure; an anti-arch ground contact component 3 is provided above the tension control component 2; two rows of anchoring locks 4 are installed on the anti-arch ground contact component 3; elastic support components 5 are respectively installed on the two rows of anchoring locks 4; the elastic support components 5 are used to check the anchoring strength; grouting auxiliary components 6 are installed on the anti-arch ground contact component 3; the anti-arch steel frame 1 includes: a steel arch frame 101, anchoring holes 102 and end plates 103, the steel arch frame 101 is an I-beam bent structure; anchoring holes 102 are respectively opened on both sides of the steel arch frame 101; end plates 103 are respectively fixedly installed at both ends of the steel arch frame 101, and four through holes are respectively opened on the two end plates 103.

[0036] In this embodiment, the anti-arch steel frame part 1 further includes: a connecting shaft 104 and a positioning stud 105, with the connecting shaft 104 rotatably mounted on each of the two end plates 103; the connecting shaft 104 has a through hole; the top of the steel arch frame 101 is threadedly connected to the positioning stud 105, and the top of the positioning stud 105 has a tapered structure; the traction control component 2 includes: a traction connecting column 201, a traction steel wire 202, and a threaded connecting cylinder 203, with two traction connecting columns 201, which are respectively inserted into the two connecting shafts 104; the ends of the traction steel wire 202 are fixedly installed. On the left-side traction connecting column 201, a threaded connecting cylinder 203 is fixedly installed at the other end of the traction steel wire 202; the inner side of the threaded connecting cylinder 203 is provided with threads; the traction control component 2 also includes: a connecting screw 204, which is fixedly installed on the right-side traction connecting column 201; the connecting screw 204 is provided with a hexagonal block; the threaded connecting cylinder 203 is provided with a hexagonal groove; the connecting screw 204 is threadedly connected to the threaded connecting cylinder 203; the connecting screw 204 is used to pull the elastic contraction of the steel arch frame 101; the steel arch frame 101 is an integrated I-beam structure, which can ensure support. The strength is high, eliminating the need for segmented assembly and avoiding the cumbersome operation caused by segmented assembly. Combined with the tension control component 2, it can be used to adjust both ends of the tensioned steel arch frame 101. While ensuring the steel arch frame 101 is a single-piece structure, it facilitates its transportation into the tunnel without being obstructed by already installed steel arch frames 101. Operation is simple; quick adjustment can be achieved using the inherent elastic deformation of the large steel arch frame 101 itself. Using a wrench to rotate the connecting screw 204, causing it to screw into the threaded connecting sleeve 203, the two ends of the steel arch frame 101 are then tensioned and undergo elastic deformation. When the distance between the two ends of the steel arch frame 101 is reduced, it is easier to enter the tunnel smoothly. Although the height will increase, it will not affect the entry into the tunnel when laid flat. As the steel arch frame 101 reaches the installation position, the connecting screw 204 can be rotated in the opposite direction with a wrench and moved outward on the threaded connecting cylinder 203. At this time, the two ends of the steel arch frame 101 can expand elastically and restore the normal distance. At this time, the top of the steel arch frame 101 will also move down and restore the normal height as the two ends move outward. At this time, the top of the steel arch frame 101 can be lifted by the tunnel construction trolley to restore the steel arch frame 101 to a vertical state and support it on the inside of the tunnel steel mesh.

[0037] In this embodiment, the anti-arch ground-attaching component 3 includes: a ground-attaching floor 301, a grouting pipe 302, and an anchoring connecting arm 303. The ground-attaching floor 301 is located above the traction steel wire 202. The grouting pipe 302 is fixedly installed on the top of the ground-attaching floor 301, and the grouting pipe 302 has threads on its outer side. Anchoring connecting arms 303 are fixedly installed on both sides of the ground-attaching floor 301, and each of the two anchoring connecting arms 303 has a through hole. The two anchoring connecting arms 303 are respectively attached to the inner side of the steel arch frame 101. The through holes on the two anchoring connecting arms 303 are respectively aligned with the two anchoring holes 102. The anchoring lock 4 includes: an anchoring mounting cylinder 401 and a pressure spring 402. An anchoring cylinder 401 is fixedly installed on the floor 301; a pressure spring 402 is sleeved on the anchoring cylinder 401; the anchoring lock 4 also includes: a compression spring 403 and a one-way positioning block 404, two compression springs 403 are fixedly installed inside the anchoring cylinder 401; two one-way positioning blocks 404 are rotatably installed inside the anchoring cylinder 401, and the ends of the two one-way positioning blocks 404 are respectively ratchet structures; the inner sides of the two one-way positioning blocks 404 are respectively fixedly installed at the ends of the two compression springs 403; the two compression springs 403 are respectively V-shaped structures; the elastic support 5 includes: an elastic sleeve 501 and a limiting ring 5011, the elastic sleeve A through hole is provided in the middle of 501; the elastic sleeve 501 is slidably sleeved on the anchoring installation cylinder 401; the outer bottom of the elastic sleeve 501 has a sloping structure; the elastic sleeve 501 is located inside the compression spring 402; one end of the compression spring 402 is fixedly connected to the elastic sleeve 501, and the other end of the compression spring 402 is fixedly connected to the anchoring installation cylinder 401; a limit ring 5011 is provided on the elastic sleeve 501; a one-way positioning block 404 is used to engage the limit ring 5011; the use of anti-arch ground-attaching component 3 in conjunction with grouting anchor rods can improve the anti-arching effect of the roadbed and is more suitable for soft soil layers, such as red mudstone roadbeds, etc., while using anchoring locking 4 and elastic... The support component 5 can be tested during the initial tensioning of the anchor rod. The initial tension strength of the anchor rod can be tested by applying excessive pressure, which can reduce the failure rate of subsequent anchoring grouting. If the expansion shell head loosens during grouting, it will directly increase the cost of cleaning the hole and may also cause safety hazards and grout leakage. At the same time, the one-way positioning block 404 can automatically limit the elastic sleeve 501 after the anchor rod anchoring strength is tested by excessive pressure, which can facilitate the adjustment and reduction of the pressure on the anchor rod, ensuring that the subsequent pressurized grouting operation can be carried out normally. It avoids the grouting pressure and the elastic force of the pressure spring 402 acting on the expansion shell head of the anchor rod at the same time. The structure is more reasonable and ensures smooth grouting.During initial tensioning and anchoring, the anchor nut is gradually rotated using a wrench. The elastic sleeve 501 is compressed downwards by the grouting, compressing the pressure spring 402. The spring force of the pressure spring 402 is greater than the grouting pressure. If the expansion head stably engages with the inner wall of the grouting hole, the elastic sleeve 501 will continue to move downwards. When the limiting ring 5011 approaches the two one-way positioning blocks 404 further, under the pressure of the compression spring 403, the two one-way positioning blocks 404 will quickly insert into the limiting ring 5011 for one-way locking. At this point, the initial tension strength meets the standard.

[0038] In Example 2, based on Example 1, the grouting auxiliary component 6 includes: a height-adaptive shell 601, a filling anti-slip groove 6011, and an inner sleeve 6012. The filling anti-slip groove 6011 facilitates the filling of concrete into the anti-slip groove 6011 after subsequent concrete pavement pouring, ensuring the connection stability between the height-adaptive shell 601 and the concrete pavement. The height-adaptive shell 601 is threadedly connected to the grouting pipe 302. Two rings of filling anti-slip grooves 6011 are formed on the outer side of the height-adaptive shell 601. The inner sleeve 6012 is fixedly installed on the inner side of the height-adaptive shell 601. The inner sleeve 6012 is located inside the grouting pipe 302. The grouting auxiliary component 6 also includes: an anti-blocking stud 602, which is threadedly connected to the inner sleeve 6012. The end of the anti-blocking stud 602 passes through the inner sleeve 6012. The height-adaptive shell 601 is used. The shell 601 allows for easy height adjustment to fit the completed concrete pavement. The inner sleeve 6012 facilitates grouting reinforcement when pavement hollowing occurs during subsequent tunnel subgrade use. Red mudstone subgrades are prone to swelling upon contact with water and exhibit strong rheological properties, easily leading to hollowing between the subgrade and the concrete pavement. The anti-blocking stud 602 allows for sealing the inner sleeve 6012 after each grouting reinforcement, preserving the grouting channel. Even with subsequent multiple grouting operations, drilling into the concrete pavement is unnecessary, avoiding damage to reinforced concrete. When hollowing is detected between the subgrade and the concrete pavement by detection equipment, the anti-blocking stud 602 can be disassembled by rotating it with a wrench. Then, the grouting pump's grouting pipe can be connected to the inner sleeve 6012 for grouting reinforcement.

[0039] The working principle of this embodiment is as follows: First, when installing the steel arch frame 101, it needs to be transported into the tunnel. The steel arch frame 101 can be laid flat on a transport flatbed truck. Then, a wrench is used to rotate the connecting screw 204, causing it to screw into the threaded connecting sleeve 203. At this time, both ends of the steel arch frame 101 are stretched and undergo elastic deformation, reducing the distance between the two ends and facilitating smooth entry into the tunnel. Although the height of the steel arch frame 101 increases at this time, it will not affect the entry into the tunnel when laid flat. As the steel arch frame 101 reaches the installation position, the connecting screw 204 can be rotated in the opposite direction again using a wrench, moving outward on the threaded connecting sleeve 203. At this time, both ends of the steel arch frame 101 can elastically expand, restoring the normal distance. The top of the steel arch frame 101 will also move down to restore its normal height as both ends move outward, without affecting the restoration of the steel arch frame 101 to a vertical state. The tunnel construction trolley lifts the top of the steel arch frame 101, restoring it to a vertical position and supporting it inside the tunnel's steel reinforcement mesh. This can be done manually. Then, a wrench drives the positioning stud 105 upwards and inserts it into the tunnel wall to further increase the stability of the steel arch frame 101. Subsequently, the two end plates 103 are adjusted and placed on the prefabricated support platform inside the tunnel and secured with bolts. The roadbed needs to be leveled beforehand. Then, the flooring 301 is placed on the tunnel roadbed. After aligning the through holes on the anchoring connecting arm 303 with the anchoring holes 102, the anchor rod is passed through the anchoring holes 102 and the anchoring connecting arm 303 for anchoring. The height can be adjusted by rotating the height adapter shell 601 to match the height of the poured road surface. The outer perimeter of the steel arch frame 101 can be anchored again, and steel bars are welded together with adjacent steel arch frames 101 to form an integrated support system.

[0040] When performing roadbed anchoring work, the anchor rod is inserted into the anchoring hole after passing through the elastic sleeve 501. Initial tensioning is then performed by adjusting the anchor rod. As the anchor rod expansion head expands and engages with the inner wall of the grouting hole, the anchor rod nut can be gradually rotated with a wrench. The elastic sleeve 501 will be pressed downwards by the anchor rod nut, compressing the pressure spring 402. The elastic force of the pressure spring 402 is greater than the pressure during grouting. If the expansion head stably engages with the inner wall of the grouting hole, the elastic sleeve 501 will continue to move downwards. The two one-way positioning blocks 404 can elastically retract without jamming. When the limiting ring 5011 further approaches the two one-way positioning blocks 404, it compresses the spring sheet. Under the compression of 403, the two one-way positioning blocks 404 will quickly insert into the limiting ring 5011 for one-way locking. At this time, the initial tension strength meets the standard, and the elastic sleeve 501 cannot move upward to reset. At this time, the anchor nut can be rotated in the opposite direction to reduce the initial tension force on the expansion shell head. Then, grouting can be performed by connecting the grouting pipe of the grouting pump to the anchor. However, if the expansion shell head is loose, the elastic sleeve 501 cannot continue to move downward and is limited by the one-way positioning block 404, indicating that the anchoring position is not up to standard. Further drilling is required to adjust the initial anchoring tension position. The detection is simple and direct and can be carried out during the initial tightening of the anchor.

[0041] After the subsequent concrete pavement pouring is completed, as the time of traffic increases, if a void is detected between the roadbed and the concrete pavement by the detection equipment, the anti-blocking stud 602 can be disassembled by rotating it with a wrench. At this time, the grouting pipe of the grouting pump can be connected to the inner sleeve 6012 for grouting reinforcement. After the grouting is completed, the anti-blocking stud 602 can be installed back into the inner sleeve 6012 to isolate the surrounding grout. Because the anti-blocking stud 602 has a smooth surface, if grouting is required again, the anti-blocking stud 602 can be disassembled again by rotating it with a wrench. Then, a drilling rig can be used to drill holes in the solidified layer formed after the previous grouting through the inner sleeve 6012 and grout can be injected. There is no need to drill holes in the concrete pavement.

[0042] The following points should be noted in this article:

[0043] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0044] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0045] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A roadbed tunnel construction anti-arching support device, comprising an anti-arch steel frame (1), wherein a tension control component (2) is installed on the anti-arch steel frame (1); characterized in that: The anti-arch steel frame part (1) is an integral bending structure of I-beams; an anti-arch ground-fitting part (3) is provided above the tension control part (2); two rows of anchoring locks (4) are installed on the anti-arch ground-fitting part (3); Elastic support members (5) are installed on the two rows of anchor locks (4); the elastic support members (5) are used to check the anchor strength; The anti-arch ground-attaching component (3) is equipped with a grouting auxiliary component (6). The anti-arch steel frame (1) includes: a steel arch frame (101), anchor holes (102), end plates (103) and connecting shaft (104). Anchor holes (102) are respectively opened on both sides of the steel arch frame (101); end plates (103) are respectively fixedly installed at both ends of the steel arch frame (101). The traction control component (2) includes: a traction connecting column (201), a traction steel wire (202), and a threaded connecting cylinder (203). There are two traction connecting columns (201), which are respectively inserted into two connecting shafts (104). The end of the traction steel wire (202) is fixedly installed on the traction connecting column (201) on the left side. The other end of the traction steel wire (202) is fixedly installed with a threaded connecting cylinder (203).

2. The anti-arching support device for roadbed tunnel construction according to claim 1, characterized in that, The anti-arch steel frame part (1) further includes: a positioning stud (105), and a connecting shaft (104) is rotatably installed on the two end plates (103); the top of the steel arch frame (101) is threadedly connected to the positioning stud (105).

3. The anti-arching support device for roadbed tunnel construction according to claim 1, characterized in that, The traction control component (2) further includes: a connecting screw (204), which is fixedly installed on the traction connecting column (201) on the right side; the connecting screw (204) is threadedly connected to the threaded connecting cylinder (203); the connecting screw (204) is used to pull the steel arch frame (101) to elastically contract.

4. The anti-arching support device for roadbed tunnel construction according to claim 1, characterized in that, The anti-arch ground-mounting component (3) includes: a ground-mounting plate (301), a grouting pipe (302), and an anchoring connecting arm (303). The ground-mounting plate (301) is located above the traction steel wire (202). The grouting pipe (302) is fixedly installed on the top of the ground-mounting plate (301), and the grouting pipe (302) has threads on the outside. Anchoring connecting arms (303) are fixedly installed on both sides of the ground-mounting plate (301), and the two anchoring connecting arms (303) are respectively provided with through holes. The two anchoring connecting arms (303) are respectively attached to the inner side of the steel arch frame (101). The through holes on the two anchoring connecting arms (303) are respectively aligned with the two anchoring holes (102).

5. The anti-arching support device for roadbed tunnel construction according to claim 4, characterized in that, The anchoring lock (4) includes: an anchoring mounting cylinder (401) and a pressure spring (402). The anchoring mounting cylinder (401) is fixedly installed on the floor (301); the pressure spring (402) is sleeved on the anchoring mounting cylinder (401).

6. The anti-arching support device for roadbed tunnel construction according to claim 5, characterized in that, The anchoring lock (4) further includes: a compression spring (403) and a one-way positioning block (404). Two compression springs (403) are fixedly installed inside the anchoring installation cylinder (401). Two one-way positioning blocks (404) are rotatably installed inside the anchoring installation cylinder (401), and the ends of the two one-way positioning blocks (404) are respectively ratchet structures. The inner sides of the two one-way positioning blocks (404) are respectively fixedly installed at the ends of the two compression springs (403). The two compression springs (403) are respectively V-shaped structures.

7. The anti-arching support device for roadbed tunnel construction according to claim 6, characterized in that, The elastic support (5) includes: an elastic sleeve (501) and a limiting ring (5011). The elastic sleeve (501) has a through hole in the middle. The elastic sleeve (501) is slidably sleeved on the anchoring cylinder (401). The bottom outer side of the elastic sleeve (501) has a sloping structure. The elastic sleeve (501) is located inside the compression spring (402). One end of the compression spring (402) is fixedly connected to the elastic sleeve (501), and the other end of the compression spring (402) is fixedly connected to the anchoring cylinder (401). The elastic sleeve (501) has a limiting ring (5011). The one-way positioning block (404) is used to engage the limiting ring (5011).

8. The anti-arching support device for roadbed tunnel construction according to claim 4, characterized in that, The grouting auxiliary component (6) includes: a height adapter shell (601), a filling anti-slip groove (6011), and an inner sleeve (6012). The height adapter shell (601) is threadedly connected to the grouting pipe (302). Two filling anti-slip grooves (6011) are provided on the outer side of the height adapter shell (601). The inner sleeve (6012) is fixedly installed on the inner side of the height adapter shell (601). The inner sleeve (6012) is located inside the grouting pipe (302).

9. The anti-arching support device for roadbed tunnel construction according to claim 8, characterized in that, The grouting auxiliary component (6) further includes: an anti-blocking stud (602), which is threadedly connected to the inner sleeve (6012); the end of the anti-blocking stud (602) passes through the inner sleeve (6012).

Images