Anti-collapse supporting structure for tunnel construction

Abstract

The utility model relates to the technical field of tunnel construction, and discloses an anti-sloughing supporting structure for tunnel construction, which comprises a tunnel hole body, a concrete spraying layer is arranged in the tunnel hole body, a plurality of connecting pieces are fixedly connected in the concrete spraying layer at equal intervals, and fixing lugs are fixedly connected to the tops of the front and rear sides of the connecting pieces. First expansion bolts penetrate through the bottoms of the multiple fixing lugs, the top ends of the multiple first expansion bolts are fixedly connected to the interior of the concrete spraying layer, and arc-shaped reinforcing ribs penetrate through the left sides and the right sides of the multiple connecting pieces. According to the supporting structure, the connecting pieces are firmly embedded into the concrete spraying layer, supporting points are provided for the arc-shaped reinforcing ribs and the longitudinal reinforcing ribs, a criss-cross reinforcing rib network is formed, complex stress is evenly dispersed into the whole supporting structure, rapid forming of the supporting structure is achieved, and the overall stability is improved; the tunnel body is effectively prevented from collapsing, and the construction risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel construction technical field especially relates to tunnel construction is with anti collapse support structure. BACKGROUND

[0002] The anti collapse support structure for tunnel construction is an important part of tunnel engineering construction, and the tunnel is an engineering building buried in the stratum. During the construction process, the tunnel faces complex geological conditions and various potential risks. Because the tunnel excavation changes the original stress balance state of the surrounding rock, the stability of the surrounding rock is seriously affected, leading to collapse. In order to ensure the safety of construction and the stability of the tunnel structure, the anti collapse support structure is widely used. By providing temporary or permanent support, the deformation and collapse of the surrounding rock are prevented, and the safety of construction personnel and equipment is protected. At the same time, it creates good conditions for subsequent tunnel lining and other construction processes. Common support forms include anchor rod support, steel frame support, sprayed concrete support and advanced support. These support structures play an important role in different geological conditions and construction stages.

[0003] The existing support structure provides support by inserting anchor rods or installing steel frames in the surrounding rock, and at the same time, the surrounding rock surface is closed and reinforced by spraying concrete. However, this support method may not fully adapt to the deformation and stress changes of the surrounding rock in complex geological conditions, such as weak surrounding rock, fault fracture zone or areas rich in underground water. The stiffness and bearing capacity of the support members such as anchor rods and steel frames are limited. When the surrounding rock deforms greatly, the support structure may not be able to adjust its stress state in time, resulting in insufficient overall stability. At the same time, the construction process of the support structure may cause certain disturbance to the surrounding rock, further weakening the stability of the surrounding rock. This insufficient overall stability not only increases the construction risk, but also may lead to the shortening of the service life of the tunnel. Therefore, it is particularly important to develop an anti collapse support structure that can better adapt to complex geological conditions and significantly improve the overall stability. SUMMARY

[0004] In order to make up for the above shortcomings, the utility model provides an anti collapse support structure for tunnel construction, which aims to improve the problem of insufficient overall stability due to the inability to fully adapt to the deformation and stress changes of the surrounding rock in the prior art.

[0005] In order to achieve the above object, the utility model discloses the following technical scheme: tunnel construction is with the anti collapse supporting structure, including tunnel hole body, the inside of tunnel hole body is provided with the concrete injection layer, the inside equal interval fixed connection of concrete injection layer has a plurality of connecting pieces, the front and back side top of a plurality of connecting pieces all are fixedly connected with fixed lug, the bottom of a plurality of fixed lug all is penetrated with first expansion bolt, the top of a plurality of first expansion bolts all is fixedly connected in the inside of concrete injection layer, the left and right sides of a plurality of connecting pieces all are penetrated with arc reinforcing rib, the front and back sides of a plurality of connecting pieces all are penetrated with longitudinal reinforcing rib, the bottom of a plurality of arc reinforcing rib all is provided with reinforcing rib fixed mechanism, and the reinforcing rib fixed mechanism is used to fix the whole supporting structure in the both sides of tunnel bottom.

[0006] As a further description of the above technical solution:

[0007] The reinforcing rib fixed mechanism includes two fixed boxes, two The inside of fixed box is provided with pouring slot, two The inside of pouring slot is used to fill concrete, two The top of fixed box is provided with a plurality of connecting holes at equal intervals, two The inside of fixed box is penetrated with the both ends of a plurality of arc reinforcing ribs from a plurality of connecting holes, two The top of fixed box is provided with a plurality of second expansion bolts at equal intervals on the adjacent side, and the adjacent between a plurality of connecting holes at the top is provided with pouring hole.

[0008] As a further description of the above technical solution:

[0009] The outer wall of a plurality of arc reinforcing ribs is provided with a tapered anti-skid groove at both ends, and the outer wall of a plurality of tapered anti-skid grooves is filled with concrete in two pouring grooves.

[0010] As a further description of the above technical solution:

[0011] The outer wall of the first expansion bolt and the second expansion bolt is provided with a strip-shaped anti-skid groove, and a plurality of strip-shaped anti-skid grooves are designed in cross.

[0012] As a further description of the above technical solution:

[0013] The top of a plurality of connecting pieces is provided with a concrete anti-skid groove, and a plurality of concrete anti-skid grooves are designed in S shape.

[0014] As a further description of the above technical solution:

[0015] The inside of the concrete injection layer is provided with a concrete fixing layer, and the concrete fixing layer is used to wrap and fix a plurality of connecting pieces, arc reinforcing ribs and longitudinal reinforcing ribs.

[0016] As a further description of the above technical solution:

[0017] The middle part of the outer wall of each of the plurality of second expansion bolts is provided with a rubber pad, and the bottom of each of the plurality of rubber pads is attached to the top of the fixing box.

[0018] Further description of the above technical solution:

[0019] The plurality of arc-shaped reinforcing ribs and the longitudinal reinforcing ribs are fixedly connected inside the concrete spraying layer through a plurality of connecting pieces, and the curvature of the plurality of arc-shaped reinforcing ribs is the same as the internal curvature of the tunnel hole body.

[0020] The utility model has the advantages of the following beneficial effects:

[0021] 1. In the utility model, the tunnel hole body surface is quickly closed by the concrete spraying layer, the connecting pieces are firmly embedded therein, providing support points for the arc-shaped reinforcing ribs and the longitudinal reinforcing ribs, the arc-shaped reinforcing ribs disperse lateral pressure along the circumference of the tunnel, and the longitudinal reinforcing ribs bear longitudinal stability, the two are matched with each other, forming a reinforcing rib network that is crisscrossed, evenly dispersing complex stress to the whole supporting structure, realizing the rapid forming of the supporting structure and the improvement of the overall stability, effectively preventing the tunnel hole body from collapsing, reducing construction risk, and improving construction efficiency.

[0022] 2. In the utility model, the two ends of the arc-shaped reinforcing rib pass through the connecting hole of the fixing box and extend to the inside, the fixing box is firmly anchored at the bottom of the tunnel by filling the concrete in the pouring groove, and the second expansion bolt further enhances the stability, the plurality of pouring holes ensure that the concrete is evenly filled, the connection strength is strengthened, the supporting structure is firmly combined with the bottom of the tunnel, the stress is effectively dispersed, the tunnel collapse is prevented, the construction safety is ensured, and the overall stability of the supporting structure is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A perspective view of the anti-collapse supporting structure for tunnel construction is provided for the utility model;

[0024] Figure 2 An internal structure schematic view of the anti-collapse supporting structure for tunnel construction is provided for the utility model;

[0025] Figure 3 A partial structure schematic view of the anti-collapse supporting structure for tunnel construction is provided for the utility model;

[0026] Figure 4 A structure schematic view of the reinforcing rib fixing mechanism in the anti-collapse supporting structure for tunnel construction is provided for the utility model;

[0027] Figure 5 A sectional view of the fixing box in the anti-collapse supporting structure for tunnel construction is provided for the utility model.

[0028] Legend:

[0029] 1, tunnel hole body; 2, reinforcing rib fixing mechanism; 201, fixing box; 202, pouring groove; 203, connecting hole; 204, second expansion bolt; 205, pouring hole; 3, concrete spraying layer; 4, connecting piece; 5, fixing lug; 6, first expansion bolt; 7, arc-shaped reinforcing rib; 8, longitudinal reinforcing rib; 9, conical anti-skid groove; 10, strip-shaped anti-skid groove; 11, concrete anti-skid groove; 12, concrete fixing layer; 13, rubber pad. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] Referring to Figure 1 , Figure 2 and Figure 3 , the present application provides an embodiment: a tunnel construction anti-collapse supporting structure, comprising a tunnel hole body 1, the inside of the tunnel hole body 1 is provided with a concrete spraying layer 3, a plurality of connecting pieces 4 are fixedly connected at equal intervals in the inside of the concrete spraying layer 3, a fixing lug 5 is fixedly connected to the top of the front and rear sides of each of the plurality of connecting pieces 4, a first expansion bolt 6 penetrates through the bottom of each of the plurality of fixing lugs 5, the top end of each of the plurality of first expansion bolts 6 is fixedly connected to the inside of the concrete spraying layer 3, an arc-shaped reinforcing rib 7 penetrates through the left and right sides of each of the plurality of connecting pieces 4, a longitudinal reinforcing rib 8 penetrates through the front and rear sides of each of the plurality of connecting pieces 4, a reinforcing rib fixing mechanism 2 is arranged at the bottom of each of the plurality of arc-shaped reinforcing ribs 7, and the reinforcing rib fixing mechanism 2 is used to fix the whole supporting structure on both sides of the tunnel bottom.

[0032] Specifically, the concrete spraying layer 3 in the supporting structure directly covers the inner wall of the tunnel hole body 1 to form a protective layer with certain strength. The concrete spraying layer 3 functions to quickly seal the surface of the tunnel hole body 1, prevent rock or soil weathering and peeling, block the erosion of underground water, and provide a stable and flat working surface for the installation of subsequent supporting structures. The connecting piece 4 is fixed inside the concrete spraying layer 3 at equal intervals, firmly embedded in the concrete spraying layer 3 through the fixing ears 5 and the first expansion bolts 6. The connecting piece 4 not only enhances the overall strength of the concrete spraying layer 3 to better withstand lateral pressure, but also provides support and connection points for other reinforcing bars. The arc-shaped reinforcing bar 7 penetrates the left and right sides of the connecting piece 4, with an arc design matching the inner wall curvature of the tunnel hole body 1, which can evenly disperse lateral pressure in the circumferential direction, preventing local rupture or deformation of the concrete spraying layer 3. The longitudinal reinforcing bar 8 penetrates the front and back sides of the connecting piece 4, arranged along the longitudinal direction of the tunnel, mainly bearing longitudinal stability to prevent cracks or deformation caused by uneven settlement or vibration. The arc-shaped reinforcing bar 7 and the longitudinal reinforcing bar 8 cooperate to form a network of reinforcing bars, further enhancing the overall stability of the supporting structure. When the tunnel hole body 1 is subjected to complex stress, the stress can be evenly dispersed to the entire supporting structure, ensuring that each part works together to resist external pressure. During tunnel construction, the supporting structure forms a solid and stable support system through the preliminary protection of the concrete spraying layer 3 and the synergistic effect of the connecting piece 4, the arc-shaped reinforcing bar 7, and the longitudinal reinforcing bar 8, effectively resisting the complex stress of lateral pressure, longitudinal pressure, vibration impact, and groundwater pressure on the tunnel hole body 1 during construction. Not only can it prevent the collapse of the tunnel hole body 1, but also can ensure the smooth progress of tunnel construction, improve construction efficiency, and reduce construction risks.

[0033] Referring to Figure 2 , Figure 4 and Figure 5 , the reinforcing bar fixing mechanism 2 includes two fixed boxes 201, each of which is internally provided with a pouring groove 202 for filling concrete. The top of each fixed box 201 is provided with a plurality of connecting holes 203 at equal intervals, and the ends of a plurality of arc-shaped reinforcing bars 7 penetrate into the fixed box 201 from the connecting holes 203. The top of each fixed box 201 is provided with a plurality of second expansion bolts 204 at equal intervals on the adjacent side, and a pouring hole 205 is arranged between the adjacent connecting holes 203 at the top.

[0034] Specifically, in the tunnel construction process, the arc-shaped reinforcing rib 7 as an important part of the supporting structure needs to be firmly fixed on both sides of the tunnel bottom through the reinforcing rib fixing mechanism 2 to realize the overall support of the supporting structure. The reinforcing rib fixing mechanism 2 is composed of two fixing boxes 201, which are respectively installed on both sides of the tunnel bottom and used for fixing the two ends of the arc-shaped reinforcing rib 7. The inside of each fixing box 201 is provided with a pouring groove 202, which is designed to fill the concrete to tightly combine the fixing box 201 with the concrete structure of the tunnel bottom. Through the pouring of the concrete, the fixing box 201 can be firmly anchored to the tunnel bottom to provide a stable support foundation for the supporting structure, which not only enhances the stability of the fixing box 201, but also further improves the integrity of the supporting structure and the tunnel bottom through the solidification characteristics of the concrete. The top of the fixing box 201 is provided with a plurality of connecting holes 203 at equal intervals, which are designed to penetrate the arc-shaped reinforcing rib 7. The two ends of the arc-shaped reinforcing rib 7 respectively pass through the connecting holes 203 and extend into the inside of the fixing box 201. This penetrating design enables the arc-shaped reinforcing rib 7 to be tightly combined with the fixing box 201, and at the same time, the stress of the arc-shaped reinforcing rib 7 is transmitted to the tunnel bottom through the fixing box 201, thereby realizing effective support of the tunnel surrounding rock. In order to further enhance the stability of the fixing box 201, a plurality of second expansion bolts 204 are provided on the adjacent side of the top of the two fixing boxes 201 at equal intervals. The expansion characteristics of the second expansion bolts 204 enable them to be firmly anchored in the concrete of the tunnel bottom, thereby providing additional support force for the fixing box 201. When the tunnel is subjected to external force, the second expansion bolts 204 can effectively disperse stress to prevent the fixing box 201 from shifting or loosening, ensuring the stability of the supporting structure. In addition, the adjacent connecting holes 203 at the top are provided with pouring holes 205. The design of the pouring holes 205 ensures that the concrete can be fully filled around the connecting holes 203 when filling the concrete inside the fixing box 201. Through the guidance of the pouring holes 205, the concrete can be evenly filled in the inside of the fixing box 201, further enhancing the connection strength between the fixing box 201 and the arc-shaped reinforcing rib 7. Not only does it improve the overall stability of the supporting structure, but also realizes the firm combination of the arc-shaped reinforcing rib 7 and the tunnel bottom through the solidification characteristics of the concrete, thereby realizing effective support of the tunnel surrounding rock to prevent tunnel collapse and ensure construction safety. Through the pouring of the concrete, the overall integrity of the supporting structure and the tunnel bottom is further enhanced, which not only improves the stability of the supporting structure, but also provides reliable safety protection for tunnel construction.

[0035] Referring to Figure 1 , Figure 3 and Figure 4The outer wall of the plurality of arc-shaped reinforcing ribs 7 is provided with a tapered anti-skid groove 9 at both ends, the outer walls of the plurality of tapered anti-skid grooves 9 are in close contact with the concrete filled in the two pouring grooves 202; the outer walls of the first expansion bolt 6 and the second expansion bolt 204 are provided with a strip-shaped anti-skid groove 10, and the plurality of strip-shaped anti-skid grooves 10 are designed in a cross shape; the top of each of the plurality of connecting pieces 4 is provided with a concrete anti-skid groove 11, and the plurality of concrete anti-skid grooves 11 are designed in an S shape; the inside of the concrete spraying layer 3 is provided with a concrete fixing layer 12, which is used to wrap and fix the plurality of connecting pieces 4, arc-shaped reinforcing ribs 7 and longitudinal reinforcing ribs 8; the outer wall of each of the plurality of second expansion bolts 204 is provided with a rubber pad 13 in the middle, and the bottom of each of the plurality of rubber pads 13 is in close contact with the top of the fixed box 201; the plurality of arc-shaped reinforcing ribs 7 and longitudinal reinforcing ribs 8 are fixedly connected at equal intervals in the inside of the concrete spraying layer 3 through the plurality of connecting pieces 4, and the curvature of the plurality of arc-shaped reinforcing ribs 7 is the same as the internal curvature of the tunnel hole body 1.

[0036] Specifically, in order to improve the anti-sliding performance of the supporting structure, the outer wall of the arc-shaped reinforcing rib 7 is provided with a tapered anti-sliding groove 9 at both ends, which enables the arc-shaped reinforcing rib 7 to be closely attached to the concrete filled in the pouring groove 202, and the engagement between the tapered anti-sliding groove 9 and the concrete can effectively prevent the arc-shaped reinforcing rib 7 from sliding when subjected to stress, thereby enhancing the overall stability of the supporting structure. The outer wall of the first and second expansion bolts 6 and 204 is provided with a strip-shaped anti-sliding groove 10, and the strip-shaped anti-sliding grooves 10 are designed in a cross shape, which can increase the friction between the expansion bolts and the concrete, prevent the expansion bolts from loosening when subjected to stress, and improve the anchoring performance. The top of the connecting piece 4 is provided with a concrete anti-sliding groove 11, which is designed in an S shape and can form a good engagement relationship with the concrete in the concrete spraying layer 3, thereby increasing the friction between the connecting piece 4 and the concrete, enabling the connecting piece 4 to be more firmly fixed in the concrete spraying layer 3 when subjected to stress, and thereby improving the overall strength of the supporting structure. The inside of the concrete spraying layer 3 is provided with a concrete fixing layer 12, which wraps the connecting piece 4, the arc-shaped reinforcing rib 7 and the longitudinal reinforcing rib 8 to form a whole, thereby resisting the pressure and deformation of the tunnel surrounding rock together and improving the bending resistance of the supporting structure. The middle part of the outer wall of the second expansion bolt 204 is provided with a rubber pad 13, the bottom of which is attached to the top of the fixing box 201, which can play a buffering and sealing role, prevent cracks in the concrete during the setting process due to loosening of the expansion bolt, and increase the friction between the expansion bolt and the fixing box 201, thereby further improving the anchoring performance of the expansion bolt. During the assembly of the supporting structure, the arc-shaped reinforcing rib 7 and the longitudinal reinforcing rib 8 are fixedly connected inside the concrete spraying layer 3 through the connecting piece 4, which can ensure that the stress of the supporting structure is uniform and avoid structural damage caused by local stress concentration. At the same time, the arc of the arc-shaped reinforcing rib 7 is the same as the internal arc of the tunnel body 1, so that the arc-shaped reinforcing rib 7 can better fit the inner wall of the tunnel and fully exert its bending resistance, effectively resisting the pressure and deformation of the tunnel surrounding rock.

[0037] Working principle: the concrete spraying layer 3 in the supporting structure directly covers the inner wall of the tunnel hole body 1, forming a protective layer with certain strength, the role of the concrete spraying layer 3 is to quickly seal the surface of the tunnel hole body 1, prevent rock or soil weathering and peeling, and block the erosion of underground water, providing a stable and flat working surface for the installation of subsequent supporting structures, the connecting piece 4 is fixed inside the concrete spraying layer 3 at equal intervals, and is firmly embedded in the concrete spraying layer 3 through the fixing lug 5 and the first expansion bolt 6, the connecting piece 4 not only enhances the overall strength of the concrete spraying layer 3, so that it can better withstand lateral pressure, but also provides support and connection points for other reinforcing ribs, the arc-shaped reinforcing rib 7 penetrates the left and right sides of the connecting piece 4, and the arc-shaped design is matched with the inner wall curvature of the tunnel hole body 1, which can evenly disperse the lateral pressure in the circumferential direction, prevent the concrete spraying layer 3 from being locally broken or deformed, and the longitudinal reinforcing rib 8 penetrates the front and back sides of the connecting piece 4 and is arranged along the longitudinal direction of the tunnel, mainly bearing longitudinal stability, preventing cracks or deformation caused by uneven settlement or vibration, the arc-shaped reinforcing rib 7 and the longitudinal reinforcing rib 8 cooperate with each other to form a network of reinforcing ribs, further enhancing the overall stability of the supporting structure, when the tunnel hole body 1 is subjected to complex stress, the stress can be evenly dispersed to the whole supporting structure, ensuring that each part works together to resist external pressure;

[0038] And, in the tunnel construction process, the arc-shaped reinforcing rib 7 as an important part of the supporting structure needs to be firmly fixed on both sides of the tunnel bottom through the reinforcing rib fixing mechanism 2 to realize the overall support of the supporting structure, the reinforcing rib fixing mechanism 2 is composed of two fixing boxes 201, the two fixing boxes 201 are respectively installed on both sides of the tunnel bottom and are used for fixing the two ends of the arc-shaped reinforcing rib 7, a pouring groove 202 is arranged in the interior of each fixing box 201, the pouring groove 202 is designed to fill the concrete, so that the fixing box 201 is tightly combined with the concrete structure of the tunnel bottom, through the pouring of the concrete, the fixing box 201 can be firmly anchored on the tunnel bottom and provide a stable support foundation for the supporting structure, not only the stability of the fixing box 201 is enhanced, but also the integrity of the supporting structure and the tunnel bottom is further improved through the solidification characteristics of the concrete, a plurality of connecting holes 203 are equidistantly arranged on the top of the fixing box 201, the connecting holes 203 are designed to penetrate the arc-shaped reinforcing rib 7, the two ends of the arc-shaped reinforcing rib 7 respectively pass through the connecting holes 203 and extend to the interior of the fixing box 201, the penetrating design makes the arc-shaped reinforcing rib 7 be tightly combined with the fixing box 201, and the stress of the arc-shaped reinforcing rib 7 is transmitted to the tunnel bottom through the fixing box 201, so that the effective support of the tunnel surrounding rock is realized, in order to further enhance the stability of the fixing box 201, a plurality of second expansion bolts 204 are equidistantly arranged on the adjacent side of the top of the two fixing boxes 201, the expansion characteristics of the second expansion bolts 204 make them be firmly anchored in the concrete of the tunnel bottom, so as to provide additional support force for the fixing box 201, when the tunnel is subjected to external force, the second expansion bolts 204 can effectively disperse the stress and prevent the displacement or loosening of the fixing box 201, so as to ensure the stability of the supporting structure, in addition, the pouring holes 205 are arranged between the adjacent connecting holes 203 on the top, the pouring holes 205 are designed to ensure that the concrete can be fully filled around the connecting holes 203 when the concrete is filled in the fixing box 201, under the guidance of the pouring holes 205, the concrete can be uniformly filled in the fixing box 201, so as to further enhance the connection strength between the fixing box 201 and the arc-shaped reinforcing rib 7.

[0039] Finally, it should be noted that: the above only for preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A collapse-resistant support structure for tunnel construction, comprising a tunnel body (1), characterized in that: The tunnel body (1) is provided with a concrete spraying layer (3). Multiple connectors (4) are fixedly connected at equal intervals inside the concrete spraying layer (3). The top of the front and rear sides of the multiple connectors (4) are fixedly connected with fixing ears (5). The bottom of the multiple fixing ears (5) is penetrated by first expansion bolts (6). The top of the multiple first expansion bolts (6) is fixedly connected to the inside of the concrete spraying layer (3). The left and right sides of the multiple connectors (4) are penetrated by arc-shaped reinforcing ribs (7). The front and rear sides of the multiple connectors (4) are penetrated by longitudinal reinforcing ribs (8). The bottom of the multiple arc-shaped reinforcing ribs (7) is provided with a reinforcing rib fixing mechanism (2). The reinforcing rib fixing mechanism (2) is used to fix the support structure as a whole to both sides of the bottom of the tunnel.

2. The anti-collapse support structure for tunnel construction according to claim 1, characterized in that: The reinforcing rib fixing mechanism (2) includes two fixing boxes (201). Each of the two fixing boxes (201) has a pouring groove (202) inside. The interior of each of the two pouring grooves (202) is used to fill concrete. The top of each of the two fixing boxes (201) has multiple connecting holes (203) at equal intervals. The two ends of the multiple arc-shaped reinforcing ribs (7) pass through the interior of the fixing boxes (201) through the multiple connecting holes (203). Multiple second expansion bolts (204) are equally spaced on the adjacent sides of the top of the two fixing boxes (201). A pouring hole (205) is provided between the adjacent connecting holes (203) at the top.

3. The anti-collapse support structure for tunnel construction according to claim 1, characterized in that: The outer walls of the multiple arc-shaped reinforcing ribs (7) are provided with conical anti-slip grooves (9) at both ends, and the outer walls of the multiple conical anti-slip grooves (9) are in contact with the concrete filling the two casting grooves (202).

4. The anti-collapse support structure for tunnel construction according to claim 1, characterized in that: Both the first expansion bolt (6) and the second expansion bolt (204) have strip-shaped anti-slip grooves (10) on their outer walls, and the multiple strip-shaped anti-slip grooves (10) are designed to cross each other.

5. The anti-collapse support structure for tunnel construction according to claim 1, characterized in that: The top of each of the connectors (4) is provided with a concrete anti-slip groove (11), and the concrete anti-slip groove (11) adopts an S-shaped design.

6. The anti-collapse support structure for tunnel construction according to claim 1, characterized in that: The interior of the sprayed concrete layer (3) is provided with a concrete fixing layer (12), which is used to wrap and fix multiple connectors (4), arc-shaped reinforcing ribs (7) and longitudinal reinforcing ribs (8).

7. The anti-collapse support structure for tunnel construction according to claim 2, characterized in that: A rubber pad (13) is provided in the middle of the outer wall of each of the multiple second expansion bolts (204), and the bottom of each of the multiple rubber pads (13) is in contact with the top of the fixing box (201).

8. The anti-collapse support structure for tunnel construction according to claim 1, characterized in that: Multiple arc-shaped reinforcing ribs (7) and longitudinal reinforcing ribs (8) are fixedly connected at equal intervals inside the concrete spraying layer (3) through multiple connectors (4), and the arc of multiple arc-shaped reinforcing ribs (7) is the same as the internal arc of the tunnel body (1).

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