Rapid construction structure for newly-added drainage tunnel of existing tunnel
By setting up multiple cross passages in the tunnel and widening the drainage hole section, combining support structure and concrete backfilling, the problem of slow construction speed of the tunnel drainage hole is solved, and the rapid penetration of the drainage hole and the improvement of the tunnel drainage capacity is achieved. Ensure operational safety and environmental protection.
Patent Information
- Application Number
- CN202420522584.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-18
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-03-18
AI Technical Summary
When dealing with water outbursts and mud swelling disasters, the construction speed of new drainage holes is slow and low efficiency, resulting in a long construction period and unable to effectively solve the water damage problem, which poses huge operational risks.
Multiple spacing horizontal channels are set up on the side of the existing tunnel near the proposed new drainage hole. One end of the horizontal channel communicates with the tunnel and the other end extends to the drainage hole. A support steel arch frame and advanced support are installed at the intersection. , the concrete backfilled to form a slope, the cable trench is filled, and the widening section of the drain hole is symmetrical with the horizontal channel as the center, and the channel is equipped with a lower longitudinal slope of no more than 10%.
By excavating cross passages, the drainage capacity and safety of the tunnel can be quickly penetrated, the drainage capacity and safety of the tunnel can be improved, maintenance costs are reduced, life and property safety and the environment are protected, the stability of the tunnel structure is enhanced, and construction time is reduced.
Smart Images
Figure CN222253971U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of existing tunnel disease treatment, in particular to a rapid construction structure for adding a drainage hole to an existing tunnel. Background Art
[0002] The problems of existing tunnel diseases often trouble traffic tunnel management units, especially tunnels that often experience water inrush and mud gushing, causing traffic interruptions and causing serious social impacts. Due to the particular geographical location of some tunnels, tunnels are often easily affected by groundwater, resulting in water inrush and mud gushing, which seriously affects the normal use and safety performance of the tunnel. The occurrence of water inrush and mud gushing disasters in existing tunnels has temporal and spatial uncertainties, which will seriously affect driving safety, especially during high-speed driving. Water inrush and mud gushing usually cause existing tunnel pavement bulging, tunnel pavement cracking, tunnel secondary lining cracking, secondary lining block falling and other diseases. For water inrush and mud gushing disasters in existing tunnels, it is usually treated by adding central drainage ditches and sedimentation wells in existing tunnels. However, for existing tunnels with severe water damage and high mud content in the outflow, only adding central drainage ditches and sedimentation wells to treat them often cannot cure water inrush and mud gushing diseases, but can only temporarily treat them. After 1-2 rainy seasons, such diseases will reappear, which poses huge operational risks. In order to cure the water burst and mud gushing diseases in existing tunnels, adding a new drainage hole has become the only option. Adding a new drainage hole in the tunnel is of great significance to improving the drainage capacity of the tunnel and ensuring the safety of the tunnel. Adding a new drainage hole can greatly improve the drainage capacity of the existing tunnel, especially for tunnels with a large amount of mud, it can cure the water burst and mud gushing diseases, reduce the risk of tunnel waterlogging, and improve the operation safety of the existing tunnel. At the same time, adding a new drainage hole in the tunnel can avoid the occurrence of problems such as leakage, effectively enhance the structural stability of the tunnel, and extend its service life. However, the high cost and long construction period of the new drainage hole plan also make the tunnel management unit hesitate. However, in the face of extremely high operational risks, the new drainage hole plan must also be implemented. Under normal circumstances, in order to reduce the impact on the existing tunnel, the drainage hole is generally arranged 30-50m away from the existing tunnel. For the existing tunnels that have been disconnected, it takes a long time to deal with the bulging and cracking of the road surface and the cracking of the second lining. Using this period of time to quickly connect the new drainage hole plan has become an option. However, in order to save costs, drainage tunnels generally use smaller cross-sections, which only require small mechanical equipment for excavation. This also results in slower excavation progress and longer construction periods for small-section tunnels such as drainage tunnels. Utility Model Content
[0003] In view of this, the purpose of the utility model is to provide a rapid construction structure for adding a drainage tunnel in an existing tunnel, so as to solve the technical problems of slow construction speed and low efficiency of drainage tunnels with small cross-sections.
[0004] The purpose of this utility model is achieved through the following technical solutions:
[0005] A rapid construction structure for adding a drainage hole to an existing tunnel comprises a plurality of spaced transverse passages arranged at one side of the existing tunnel close to the drainage hole to be added, wherein one end of the transverse passage is connected to the existing tunnel and the other end extends to the drainage hole to be added.
[0006] Furthermore, supporting steel arch frames and advance supports are provided at the intersection of the cross passage and the existing tunnel.
[0007] Furthermore, the existing tunnel pavement and the cable trench are backfilled with concrete to form an inclined surface, and the cable trench is filled with concrete after the cover plate is removed.
[0008] Furthermore, a drainage tunnel widening section is arranged at the intersection of the transverse passage and the proposed new drainage tunnel, and the drainage tunnel widening section is symmetrical on both sides with the transverse passage as the center.
[0009] Furthermore, the length of the widened section of the drainage hole is 8 meters.
[0010] Furthermore, the horizontal passage leading to the proposed new drainage tunnel is set with a downward longitudinal slope of no more than 10%.
[0011] The beneficial effects of the utility model are:
[0012] The utility model provides a rapid construction structure for adding a drainage hole to an existing tunnel, which has the following beneficial effects:
[0013] (1) Excavating multiple cross passages at intervals on the side of the existing tunnel near the drainage hole can increase the construction face of the drainage hole, realize short construction of long holes, and quickly penetrate the new drainage hole.
[0014] (2) The transverse channel can also be used as a drainage channel to disperse the accumulated water in the existing tunnel into the newly added drainage tunnel, thereby improving the operational safety of the existing tunnel.
[0015] (3) Adding drainage holes to existing tunnels can not only improve the drainage capacity and service life of the tunnel, but also improve the safety and environmental performance of the tunnel. This is of great significance for ensuring the safety of vehicle traffic, reducing the maintenance cost of the tunnel, protecting the lives and property of personnel, and protecting the local environment.
[0016] The stability of the intersection between the existing tunnel and the cross passage is ensured by setting up supporting steel arch frames and advance supports.
[0017] Concrete backfilling makes it easier for construction vehicles to enter the cross passage from the existing tunnel.
[0018] The widened section of the drain tunnel is set up to facilitate construction vehicles to turn around at the intersection of the cross passage and the proposed new drain tunnel.
[0019] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings, in which:
[0021] Figure 1 It is a front sectional view of the utility model.
[0022] Figure 2 It is a top view of the utility model.
[0023] In the figure: existing tunnel 1, existing tunnel opening 2, advanced support 3, steel arch frame 4, concrete 5, cross passage 6, and planned new drainage tunnel 7. DETAILED DESCRIPTION
[0024] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, rather than for limiting the protection scope of the present invention.
[0025] Existing tunnels often suffer from water gushing, mud bursting and other problems during the rainy season, which seriously affect driving safety, making the construction of new drainage tunnels the only option. In order to reduce the impact of the construction of new small-section drainage tunnels on the travel time of existing tunnels, a rapid construction structure for adding drainage tunnels to existing tunnels is proposed, as follows:
[0026] like Figure 1-2As shown, a rapid construction structure for adding a drainage hole to an existing tunnel comprises a plurality of transverse passages 6 which are arranged at intervals on the side of the existing tunnel 1 close to the proposed drainage hole 7, one end of the plurality of transverse passages 6 is connected to the existing tunnel 1, and the other end extends to the proposed drainage hole 7. The utility model adopts a method of excavating a plurality of transverse passages on the side of the existing tunnel 1 close to the proposed drainage hole 7 to realize the short-cut of the long hole of the newly added drainage hole, quickly penetrate the newly added drainage hole, and disperse the accumulated water in the existing tunnel 1 into the newly added drainage hole; a supporting steel arch frame 4 and an advance support 3 are arranged at the intersection of the transverse passage 6 and the existing tunnel 1 to increase the intersection of the transverse passage 6 and the existing tunnel 1 stability at the place; in order to facilitate the construction vehicles to drive into the cross channel 6 from the existing tunnel 1, the road surface of the existing tunnel 1 and the cable trench are backfilled with concrete 5 to form an inclined surface, the cable trench cover is removed, and the cable trench is filled with concrete 5. After the construction of the new drainage tunnel is completed, the backfilled concrete 6 needs to be removed; in order to facilitate the construction vehicles to turn around at the intersection of the cross channel 6 and the proposed new drainage tunnel 7, a drainage tunnel widening section 8 is set at the intersection of the cross channel 6 and the proposed new drainage tunnel 7. The drainage tunnel widening section 8 is symmetrical on both sides with the cross channel 6 as the center, and the length of the drainage tunnel widening section 8 is 8 meters. The cross channel 6 is set with a downward longitudinal slope of no more than 10% in the direction leading to the proposed new drainage tunnel 7.
[0027] During the construction of the transverse passage 6, firstly, an incision is excavated on the side of the existing tunnel 1 close to the proposed new drainage hole 6 to form the existing tunnel opening 2, then a steel arch frame 4 is set at the opening, an advance support 3 is set, and finally the transverse passage 6 is excavated. The transverse passage 6 is set with a longitudinal slope of no more than 10% leading to the direction of the proposed new drainage hole 7.
[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.
Claims
1. A rapid construction structure for adding a drainage hole to an existing tunnel, characterized in that: It comprises a plurality of transverse passages (6) arranged at intervals on a side of an existing tunnel (1) close to a newly added drainage hole (7), wherein one end of the transverse passage (6) is connected to the existing tunnel (1) and the other end extends to the newly added drainage hole (7).
2. The rapid construction structure for adding a drainage hole to an existing tunnel according to claim 1 is characterized in that: A supporting steel arch frame (4) and an advance support (3) are provided at the intersection of the transverse passage (6) and the existing tunnel (1).
3. The rapid construction structure for adding a drainage hole to an existing tunnel according to claim 1 or 2, characterized in that: The existing tunnel (1) road surface and the cable trench are backfilled with concrete (5) to form an inclined surface, and the cable trench is filled with concrete (5) after the cover plate is removed.
4. The rapid construction structure for adding a drainage hole to an existing tunnel according to claim 1 or 2, characterized in that: A drainage hole widening section (8) is provided at the intersection of the transverse passage (6) and the proposed newly added drainage hole (7), and the drainage hole widening section (8) is symmetrical on both sides with the transverse passage (6) as the center.
5. The rapid construction structure for adding a drainage hole to an existing tunnel according to claim 4 is characterized in that: The length of the widened section (8) of the drainage hole is 8 meters.
6. The rapid construction structure for adding a drainage hole to an existing tunnel according to claim 1, characterized in that: The transverse passage (6) is provided with a downward longitudinal slope of no more than 10% in the direction leading to the proposed new drainage hole (7).