Temporary supporting structure for highway tunnel inverted arch disease treatment
By setting up lateral temporary supports and locking foot force transmission structures during the treatment of tunnel invert arch defects, a multi-point support system was formed, which solved the problems of tunnel lining deformation control and safety hazards, and achieved construction safety and long-term stability of the tunnel structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-03-03
AI Technical Summary
In the process of treating defects in the invert arch of highway tunnels, the lack of effective temporary support technology leads to poor control of lining deformation, which may cause excessive settlement of the arch lining or instability and damage to the sidewalls, posing serious safety hazards.
Design a temporary support structure for treating defects in the invert arch of a highway tunnel, including a transverse temporary support and a locking foot force transmission structure. The transverse temporary support is located above the tunnel invert arch and extends to the arch foot. The locking foot force transmission structure transfers the load to the surrounding rock through steel pipes or concrete pier foundations, forming a multi-point support system to disperse the lateral pressure of the surrounding rock and the construction disturbance load.
It effectively controls lining deformation, prevents settlement and instability, ensures construction safety, improves the long-term stability of tunnel structures, adapts to different degrees of damage and project types, and improves construction efficiency.
Smart Images
Figure CN223964489U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of highway engineering technology, and in particular to a temporary support structure for treating defects in the invert arch of a highway tunnel. Background Technology
[0002] With the rapid development of highway tunnel construction in my country and the continuous increase in tunnel operating mileage, the invert arch, as a key load-bearing component in the tunnel structure, is facing increasingly prominent problems related to defects. During long-term operation, due to factors such as complex geological conditions, repeated vehicle loads, and groundwater erosion, the invert arch often exhibits typical defects such as cracking, misalignment, base heave, and insufficient structural layer thickness. These defects not only affect the normal use of the tunnel but may also threaten the overall structural safety of the tunnel.
[0003] When invert arches suffer damage, repair is usually required. The repair process generally includes removing the invert arch filler, exposing the damage, and taking appropriate treatment measures based on the actual situation. For sections where the invert arch structure is already damaged, demolition and reconstruction are necessary; for sections without structural damage but with reduced load-bearing capacity, foundation reinforcement is required. However, during the treatment of invert arch damage, the tunnel arch lining is prone to settlement and deformation due to the loss of bottom support. Simultaneously, the loss of the invert arch's closed-loop function significantly weakens the lining structure's ability to resist lateral pressure from the surrounding rock. In such cases, without effective temporary support measures, excessive settlement of the arch lining or inward instability of the secondary lining sidewalls may occur, leading to serious safety hazards.
[0004] Currently, there is a lack of a reasonable and efficient temporary support technology for treating tunnel invert arch defects, which can effectively control lining deformation and prevent excessive settlement of the arch lining or instability and damage to the sidewalls. Therefore, how to design a temporary support structure that can provide stable support during invert arch replacement, ensure construction safety, and maintain the long-term stability of the tunnel structure has become an urgent technical problem to be solved. Utility Model Content
[0005] To address the aforementioned technical problems, this utility model provides a temporary support structure for the treatment of invert arch defects in highway tunnels. The purpose is to control the deformation of the lining during the treatment of invert arch defects, prevent excessive settlement of the arch lining or inward instability and damage to the secondary lining sidewalls during invert arch replacement, thereby ensuring the smooth progress of the entire invert arch defect treatment process and the long-term stability of the tunnel structure.
[0006] The technical solution adopted in this utility model is as follows:
[0007] A temporary support structure for treating defects in the invert arch of a highway tunnel is provided. Several sets of these temporary support structures are arranged at equal intervals along the tunnel direction. Each set of these temporary support structures is located above the tunnel invert arch and extends laterally to the arch foot of the secondary lining of the tunnel at both ends.
[0008] Each set of temporary support structures for treating arch defects in the highway tunnel includes transverse temporary supports and locking foot force transmission structures. The transverse temporary supports are laid out laterally and their ends are supported against the lining on both sides of the tunnel arch foot. The locking foot force transmission structures are located at the arch feet on both sides of the tunnel and are fixedly connected to the two ends of the transverse temporary supports.
[0009] Furthermore, when the length of the invert replacement section is less than or equal to 300cm, the lateral temporary support is set on both sides of the tunnel invert replacement section.
[0010] Furthermore, the lateral temporary support is a reinforced concrete ground beam, which is located above the tunnel invert and extends laterally to the arch foot of the secondary lining of the tunnel at both ends; the locking foot force transmission structure is a steel pipe that is connected to the reinforced concrete ground beam at one end and extends through the arch foot on both sides of the tunnel into the surrounding rock at the other end.
[0011] Furthermore, two steel pipes are connected to each end of each reinforced concrete ground beam, with the steel pipes installed at an angle of 30 to 45 degrees to the horizontal line.
[0012] Furthermore, the steel pipe has a half-I-beam inside its body; an anchor head is installed at the arch foot of the steel pipe; the anchor head includes an anchor head plate fixedly fitted onto the steel pipe, and through holes are opened at the four corners of the anchor head plate, through which reinforcement bars are installed.
[0013] Furthermore, the lateral temporary support is an I-beam, which is located above the tunnel invert arch and extends laterally to the arch foot of the secondary lining of the tunnel at both ends; the locking foot force transmission structure is a concrete pier foundation poured at the arch foot on both sides of the tunnel.
[0014] Furthermore, each set of temporary support structures for the treatment of arch defects in the highway tunnel includes three parallel H-beams, with both ends of each H-beam anchored to the concrete pier foundation; several longitudinal connection structures 13 are also provided between the three parallel H-beams.
[0015] The beneficial effects of this utility model are:
[0016] 1. Forming a multi-point support system to enhance structural stability: During the replacement of the invert arch, several sets of temporary transverse support structures are set above the tunnel invert arch, and locking force transmission structures are set at the arch feet on both sides of the tunnel, forming a multi-point support system. This system can effectively disperse the lateral pressure of the surrounding rock and the construction disturbance load, avoid local stress concentration, and thus enhance the overall stability of the tunnel lining structure.
[0017] 2. Effective control of lining deformation, preventing settlement and instability: The transverse temporary support structure supports the lining on both sides of the tunnel arch foot and transfers the force to the surrounding rock or foundation through the locking foot force transmission structure, which can significantly reduce the settlement deformation of the arch lining caused by the loss of bottom support. At the same time, this structure can effectively prevent the secondary lining sidewalls from inward instability and failure due to excessive lateral pressure, ensuring the safety of the tunnel structure.
[0018] 3. Ensuring Construction Safety and Efficiency: During the treatment of invert arch defects, the temporary support structure provides reliable transitional support for the tunnel, avoiding the risk of structural instability caused by the removal and reconstruction of the invert arch. Reinforced concrete ground beams or I-beams can be used, allowing for flexible selection of support forms based on the severity of the defects, thus meeting construction requirements while improving efficiency.
[0019] 4. Enhancing the long-term stability of the tunnel structure: The temporary support structure provides stable support during the replacement of the invert arch, ensuring that the lining structure is not damaged during construction. After the invert arch is repaired, the lining structure restores its closed loop function, and the overall load-bearing capacity is improved, thereby ensuring the long-term operational safety of the tunnel structure.
[0020] 5. High adaptability and wide applicability: The two types of lateral temporary support adopted in this utility model are suitable for different degrees of invert arch damage: reinforced concrete ground beams are suitable for milder damage, providing stable long-term support; I-beams are suitable for more severe damage, facilitating quick installation and removal. The locking foot force transmission structure further enhances the adaptability and reliability of the support system, making it suitable for different types of tunnel projects.
[0021] In summary, the temporary support structure for treating invert arch defects in highway tunnels provided by this utility model offers reliable technical protection for the tunnel structure during invert arch replacement. Its multi-point support system effectively resists lateral pressure from the surrounding rock and construction disturbance loads, controls lining deformation, and prevents excessive settlement or instability of the arch lining, thereby ensuring the smooth progress of the entire invert arch defect treatment process and the long-term stability of the tunnel structure. This technical solution has significant technical advantages and practical application value, and can be widely applied to the repair of defects in various types of highway tunnels. Attached Figure Description
[0022] Figure 1This is a schematic diagram showing the installation position of the temporary support structure for treating the invert arch defects in highway tunnels according to the first type of utility model.
[0023] Figure 2 This is a schematic diagram of the plan installation of the first type of temporary support structure for treating defects in the inverted arch of a highway tunnel according to this utility model;
[0024] Figure 3 This is a schematic diagram of the structure of the steel flower tube with an internal half-I-beam of this utility model;
[0025] Figure 4 and Figure 5 This is a structural schematic diagram of the steel perforated pipe anchor head of this utility model;
[0026] Figure 6 This is a schematic diagram showing the installation location of the second type of temporary support structure for treating defects in the inverted arch of a highway tunnel according to this utility model.
[0027] Figure 7 This is a schematic diagram of the plan installation of the second type of temporary support structure for treating the invert arch defects in highway tunnels according to this utility model.
[0028] In the diagram, 1—tunnel invert, 2—arch foot, 3—temporary transverse support, 4—locking foot force transmission structure, 5—reinforced concrete ground beam, 6—steel pipe, 7—half-frame I-beam, 8—anchor head, 9—anchor head plate, 10—rebar installation, 11—I-beam, 12—concrete pier foundation, 13—longitudinal connection structure, 14—invert replacement section. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1
[0030] To address the insufficient stability of the tunnel lining structure and significant damage during invert replacement, this embodiment provides a temporary support structure for treating invert defects in highway tunnels. Several sets of these temporary support structures are arranged at equal intervals along the tunnel's direction; for example... Figure 1 As shown, each group of temporary support structures for the treatment of defects in the invert arch of the highway tunnel is located above the invert arch 1 of the tunnel, and extends laterally to the arch foot 2 of the secondary lining of the tunnel at both ends.
[0031] Specifically, such as Figure 1 and Figure 2As shown, each set of temporary support structures for treating the invert arch defects of this highway tunnel includes a transverse temporary support 3 and a locking foot force transmission structure 4. The transverse temporary support 3 is arranged transversely and its two ends abut against the lining on both sides of the tunnel arch foot 2; in this embodiment, the transverse temporary support 3 is a reinforced concrete ground beam 5 with a thickness D of 100cm, which has sufficient rigidity and load-bearing capacity to meet the load requirements under mild defects; the reinforced concrete ground beam 5 is located above the tunnel invert arch 1 and its two ends extend transversely to the tunnel secondary lining arch foot 2.
[0032] The locking foot force transmission structure 4 is located at the arch feet 2 on both sides of the tunnel and is fixedly connected to both ends of the transverse temporary support 3; in this embodiment, the locking foot force transmission structure 4 is connected to the reinforced concrete ground beam 5 at one end, and the other end extends through the arch feet 2 on both sides of the tunnel to the surrounding rock through the steel perforated pipe 6; each end of the reinforced concrete ground beam 5 is connected to two φ108×6mm steel perforated pipes 6, such as Figure 1 As shown, the connection length between the steel pipe 6 and the reinforced concrete ground beam 5 is... l The steel pipe is 100cm long and installed at an angle of 30-45 degrees to the horizontal.
[0033] Furthermore, such as Figure 2 As shown, the length of the invert replacement section 14 is L. When the length of the invert replacement section 14 is L≤300cm, the transverse temporary supports 3 can be set only on the front and rear sides of the tunnel invert replacement section 1 to meet the construction requirements. The center-to-center distance between the two sets of transverse temporary supports 3 is d1. In this embodiment, the center-to-center distance d1 between the two sets of transverse temporary supports 3 is set to 500cm, which ensures the coverage of the support system and avoids resource waste caused by excessive arrangement.
[0034] The temporary support structure for treating invert arch defects in highway tunnels provided in this embodiment mainly achieves effective control over the stability of the tunnel lining structure and ensures the safety and reliability of the invert arch replacement process through the following working principles:
[0035] The temporary support structure consists of several sets of support units evenly spaced along the tunnel direction. Each set of support units includes a transverse temporary support 3 and a locking toe force transmission structure 4. The transverse temporary support 3 is located above the invert arch and extends to the arch feet 2 on both sides, forming a stable horizontal load-bearing system. This multi-point support design can distribute the lateral pressure of the surrounding rock and the construction disturbance load to multiple support points, avoiding local stress concentration, thereby enhancing the overall stability of the tunnel lining.
[0036] The transverse temporary support 3 serves as the main load-bearing component, with its two ends supporting the lining on both sides of the tunnel arch foot 2, directly bearing the vertical load and lateral pressure transmitted by the arch lining. One end of the steel pipe 6 of the locking foot force transmission structure 4 is fixedly connected to the reinforced concrete ground beam 5, while the other end is driven diagonally downward into the surrounding rock, thereby further transferring the load at the arch foot 2 to the depth of the surrounding rock, thus reducing the settlement deformation of the tunnel lining caused by the loss of the invert arch support.
[0037] During the replacement of the invert arch, the tunnel arch lining is prone to settlement and deformation due to the removal of the invert arch filling and the loss of its closed loop function. By setting up temporary transverse supports 3, the lining on both sides of the arch foot 2 can be effectively supported, limiting the settlement and inward movement of the lining. The locking foot force transmission structure 4 transfers the load at the arch foot 2 to the surrounding rock, reducing the risk of excessive settlement of the lining due to insufficient bottom support or inward instability and failure of the secondary lining sidewalls.
[0038] Furthermore, in order to enhance the bending resistance of the steel perforated pipe 6, such as... Figure 3 As shown, in this embodiment, the steel pipe 6 has a half-I-beam 7 inside the pipe body; the half-I-beam 7 is a half-I14 I-beam, which is welded and fixed to the inner wall at the end of the steel pipe 6; by inserting the half-I-beam 7 inside the steel pipe 6, the bending resistance of the steel pipe 6 is enhanced.
[0039] In addition, to ensure the effective transmission of force, such as Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment, the steel pipe 6 is equipped with an anchor head 8 at the arch foot 2 position; the anchor head 8 includes an anchor head plate 9 fixedly fitted on the steel pipe 6, and through holes are opened at the four corners of the anchor head plate 9, and rebars 10 are installed at the four corners of the anchor head plate 9 through the through holes; the anchor head 8 is tightly connected to the surrounding rock through the rebars 10 to ensure effective force transmission. Example 2
[0040] To address the insufficient stability of the tunnel lining structure during invert replacement, especially when the damage is minor, this embodiment provides a temporary support structure for treating invert defects in highway tunnels. Several sets of these temporary support structures are arranged at equal intervals along the tunnel's direction; for example... Figure 6 As shown, each group of temporary support structures for the treatment of defects in the invert arch of the highway tunnel is located above the invert arch 1 of the tunnel, and extends laterally to the arch foot 2 of the secondary lining of the tunnel at both ends.
[0041] Specifically, such as Figure 6 and Figure 7As shown, each set of temporary support structures for treating the invert arch defects of this highway tunnel includes a transverse temporary support 3 and a locking force transmission structure 4. The transverse temporary support 3 is arranged laterally, and its two ends abut against the lining on both sides of the tunnel arch foot 2. In this embodiment, the transverse temporary support 3 is an I-beam 11, which is made of I14 I-beam and has sufficient rigidity and load-bearing capacity to meet the load requirements under severe defects. The I-beam 11 is located above the tunnel invert arch 1, and its two ends extend laterally to the tunnel secondary lining arch foot 2. The locking force transmission structure 4 is a concrete pier foundation 12 cast at the arch feet 2 on both sides of the tunnel, and the two ends of the I-beam 11 extend into the concrete pier foundation 12 for anchoring.
[0042] Furthermore, such as Figure 7 As shown, the length of the replacement section 14 of the invert arch is L. When the length of the replacement section 14 of the invert arch is ≤ 300cm, the transverse temporary support 3 can be set only on the front and rear sides of the replacement section of the invert arch 1 to meet the construction requirements. Meanwhile, each set of temporary support structures for the treatment of invert arch defects in this highway tunnel uses three parallel I-beams 11 with a parallel spacing d2 of 120cm. To connect the three parallel I-beams 11 into a single unit and enhance the overall stability of the transverse temporary support 3, as shown... Figure 7 As shown, in this embodiment, several longitudinal connecting structures 13 are provided between the three parallel H-beams 11. The longitudinal connecting structures 13 are made of hot-rolled steel or hot-rolled ribbed steel bars, and their ends are welded to the adjacent H-beams 11.
[0043] The temporary support structure for treating invert arch defects in highway tunnels provided in this embodiment mainly achieves effective control over the stability of the tunnel lining structure and ensures the safety and reliability of the invert arch replacement process through the following working principles:
[0044] The temporary support structure consists of several sets of support units evenly spaced along the tunnel direction. Each set of support units includes a transverse temporary support 3 and a locking foot force transmission structure 4. The transverse temporary support 3 uses three parallel H-beams 11, located above the invert arch and extending to the arch feet 2 on both sides, forming a stable horizontal load-bearing system. The multiple sets of support units work together to disperse the lateral pressure of the surrounding rock and the construction disturbance load, avoiding local stress concentration, thereby enhancing the overall stability of the tunnel lining.
[0045] The transverse temporary support 3 serves as the main load-bearing component. The two ends of the I-beam 11 abut against the lining on both sides of the tunnel arch foot 2, directly bearing the vertical load and lateral pressure transmitted from the arch lining. The concrete pier foundation 12 of the anchorage force transmission structure 4 is poured at the arch feet 2 on both sides of the tunnel. The two ends of the I-beam 11 extend into the concrete pier foundation 12 for anchorage, effectively transferring the load at the arch foot 2 to the foundation, and then distributing it to the foundation at the bottom of the tunnel. The I-beams 11 are welded together using hot-rolled steel sections or hot-rolled ribbed steel bars to form an integral structure, further enhancing the overall stability of the transverse temporary support 3.
[0046] During the replacement of the invert arch, the tunnel arch lining is prone to settlement and deformation due to the removal of the invert arch infill and the loss of its closed loop function. By setting up temporary transverse supports 3, the lining on both sides of the arch foot 2 can be effectively supported, limiting the settlement and inward movement of the lining. The concrete pier foundation 12 provides a stable anchor point, transferring the load at the arch foot 2 to the foundation, reducing the risk of excessive settlement of the lining due to insufficient bottom support or inward instability and failure of the secondary lining sidewalls.
[0047] This temporary support structure for treating invert arch defects in highway tunnels is particularly suitable for scenarios with severe invert arch defects. Through the synergistic effect of the I-beam 11 and the concrete pier foundation 12, an efficient temporary support system is formed, which can ensure construction safety and the long-term stability of the tunnel structure.
[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A temporary support structure for treatment of a highway tunnel invert disease, characterized in that: The temporary support structures for treating the diseases of the inverted arches of the highway tunnel are arranged at equal intervals along the tunnel direction, each of the temporary support structures for treating the diseases of the inverted arches of the highway tunnel is located above the inverted arch of the tunnel and extends laterally to the position of the arch foot of the secondary lining of the tunnel at both ends; Each of the temporary support structures for treating the diseases of the inverted arches of the highway tunnel comprises a lateral temporary support and a lock foot force transmission structure; the lateral temporary support is arranged laterally and abuts against the lining at both ends of the arch foot of the tunnel; the lock foot force transmission structure is located at the arch foot of the tunnel at both sides and is fixedly connected with the lateral temporary support at both ends.
2. The temporary support structure for treatment of the disease of the inverted arch of the highway tunnel according to claim 1, characterized in that: When the length of the inverted arch replacement section is less than or equal to 300 cm, the lateral temporary support is arranged at both sides of the inverted arch replacement section of the tunnel.
3. The temporary support structure for treatment of the disease of the inverted arch of the highway tunnel according to claim 1, characterized in that: The lateral temporary support is a reinforced concrete beam, which is located above the inverted arch of the tunnel and extends laterally to the position of the arch foot of the secondary lining of the tunnel at both ends; the lock foot force transmission structure is a steel pipe, which is connected with the reinforced concrete beam at one end and extends into the surrounding rock through the arch foot of the tunnel at the other end.
4. The temporary support structure for treatment of the disease of the inverted arch of the highway tunnel according to claim 3, characterized in that: Two steel pipes are connected with both ends of each reinforced concrete beam, and the angle between the steel pipes and the horizontal line is 30-45 degrees.
5. The temporary support structure for the treatment of the disease of the inverted arch of the highway tunnel according to claim 3 or 4, characterized in that: A half H-shaped steel is arranged inside the pipe body of the steel pipe; an anchor head is arranged at the position of the arch foot of the steel pipe; the anchor head comprises an anchor head plate which is sleeved on the steel pipe, through holes are formed at the four corners of the anchor head plate, and a steel bar is arranged at the four corners of the anchor head plate through the through holes.
6. The temporary support structure for treatment of the disease of the highway tunnel invert according to claim 1, characterized in that: The lateral temporary support is a H-shaped steel, which is located above the inverted arch of the tunnel and extends laterally to the position of the arch foot of the secondary lining of the tunnel at both ends; the lock foot force transmission structure is a concrete pier foundation which is poured at the arch foot of the tunnel at both sides.
7. The temporary support structure for treatment of the disease of the inverted arch of the highway tunnel according to claim 6, characterized in that: Each of the temporary support structures for treating the diseases of the inverted arches of the highway tunnel comprises three H-shaped steels which are arranged in parallel, both ends of each H-shaped steel are anchoringly connected with the concrete pier foundation; a plurality of longitudinal connecting structures are further arranged between the three H-shaped steels which are arranged in parallel.