Water pressure reduction device for deep-buried tunnel lining in water-rich tunnel section

Abstract

This invention discloses a device for reducing external water pressure on the lining of a deep-buried tunnel in a water-rich section. The device includes a lining body, with multiple sets of first pressure-bearing plates arranged around its outer ring. Multiple sets of second pressure-bearing plates are arranged on the side of the first pressure-bearing plates that are close to each other. This device reduces external water pressure on the lining by incorporating pressure-bearing blocks, movable blocks, a third water pipe, and drainage channels, thus protecting the groundwater. The first pressure-bearing plates protect the lining body, while the second pressure-bearing plates reduce the impact of water pressure on the pressure-bearing groove, protecting it. The water collection tank, drainage channels, first filter plates, and second filter plates allow water to be drained from the lining body, preventing water accumulation and ensuring the tunnel's usability.

Description

Technical Field

[0001] This invention relates to the field of external water pressure reduction technology for linings, specifically to a device for reducing external water pressure in the lining of deeply buried tunnels in water-rich sections. Background Technology

[0002] Transportation engineering is a vital national infrastructure, playing a crucial role in national economic development. In Yunnan, Guizhou, and Sichuan, many cities are divided into different administrative regions by mountains. To accelerate the flow of people and goods between urban areas and alleviate the pressure on urban public transportation, it is necessary to construct a large number of intercity transportation tunnels in mountainous areas, including highway tunnels, railway tunnels, and subway tunnels. However, the tunnel sites in Yunnan, Guizhou, and Sichuan often involve water-rich karst strata with high water pressure. In urban mountainous transportation tunnels in water-rich areas, the design of drainage and waterproofing should adopt the design concept of "drainage as the main focus".

[0003] However, the design philosophy of "drainage-oriented" will cause many problems. Water pressure is often not considered in the lining structure design calculations, resulting in thinner linings that frequently crack. Simultaneously, the long-term drainage of groundwater from the tunnel lowers the groundwater level, causing surface water loss and settlement deformation above the tunnel, leading to water shortages for residents in the tunnel site area and building collapses. Furthermore, the large-scale loss of groundwater from the tunnel washes away the filling material in the groundwater seepage channels in the surrounding rock (such as rock joints, fissures, or karst conduits), making the tunnel increasingly porous. This could lead to a continuous increase in the flow rate inside the tunnel, causing various problems such as lining leakage and deformation, road surface frost heave and mud flow, and drainage ditch siltation and overflow to become more serious year by year. At the same time, the expansion of the seepage channels behind the lining will also cause uneven stress on the lining. If a solution based on plugging is adopted in high water pressure sections, it will result in a very large water pressure, increasing the difficulty of tunnel construction and increasing construction costs. In addition, during the later use period, tunnel leakage or lining cracking may occur due to excessive water pressure on the lining, posing a serious threat to the urban traffic environment and safety. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a device for reducing external water pressure in the lining of deep-buried tunnels in water-rich sections, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for reducing external water pressure in the lining of a deep-buried tunnel in a water-rich section, comprising a lining body, wherein multiple sets of first pressure-bearing plates are arranged on the outer ring of the lining body, and multiple sets of second pressure-bearing plates are arranged on the side of the first pressure-bearing plates that are close to each other. Pressure-bearing grooves are provided on both side walls of the lining body, and two sets of telescopic springs are provided on the bottom inner wall of the pressure-bearing grooves. A movable block is provided at the other end of the telescopic springs, and a pressure-bearing block is provided on the top surface of the movable block. An inverted arch is provided on the bottom surface of the lining body, and water collection grooves are provided on both sides of the top surface of the inverted arch. A first filter plate and a second filter plate are provided on the water collection grooves. A drainage channel is provided on the bottom surface of the inverted arch, and a track support surface is provided on the top surface of the inverted arch.

[0006] As a preferred embodiment of the present invention, the first bearing plate is arranged in an arc shape on the outer surface of the lining body, and the first bearing plate is composed of two parts, with the upper cross section of the first bearing plate being triangular and the lower cross section being rectangular.

[0007] As a preferred embodiment of the present invention, the second bearing plate is disposed on the outer surface of the lining body, and the second bearing plate is disposed at a position close to the two first bearing plates, and multiple sets of through holes are opened on one side surface of the second bearing plate, and the cross section of the second bearing plate is triangular.

[0008] As a preferred embodiment of the present invention, a third water pipe is provided on both sides of the pressure-bearing tank, extending through and into the drainage channel. The third water pipe is L-shaped, and one end of the third water pipe located inside the pressure-bearing tank is positioned above both sides of the pressure-bearing tank.

[0009] As a preferred embodiment of the present invention, multiple sets of first water pipes are provided at the lower part of the first pressure plate, and the multiple sets of first water pipes provided at the lower part of the first pressure plate are respectively arranged on the side of the two second pressure plates that are close to each other.

[0010] As a preferred technical solution of the present invention, a plurality of second water pipes are provided on one side of the water collection tank, which penetrate and extend into the interior of the drainage channel, and the second water pipes are arranged at an inclination.

[0011] As a preferred embodiment of the present invention, the top surface of the first filter plate is provided with multiple sets of filter holes penetrating the first filter plate, and the top surface of the second filter plate is provided with multiple sets of filter holes penetrating the second filter plate, and the multiple sets of filter holes provided in the first filter plate and the second filter plate are both rectangular.

[0012] As a preferred embodiment of the present invention, a first clamping plate is provided on both sides of the first filter plate, and a second clamping plate is provided on both sides of the second filter plate, wherein the first clamping plates provided on both sides of the first filter plate and the second clamping plates provided on both sides of the second filter plate are compatible with each other.

[0013] As a preferred embodiment of the present invention, the movable block is slidably connected within the pressure-bearing groove, the movable block is adapted to the pressure-bearing groove, and the cross-section of the pressure-bearing block is trapezoidal.

[0014] Compared with the prior art, the present invention provides a device for reducing external water pressure in the lining of deep-buried tunnels in water-rich sections, which has the following beneficial effects:

[0015] 1. The external water pressure relief device for the deep-buried tunnel lining in this water-rich section is constructed by setting up a pressure-bearing block, a movable block, a third water pipe, and a drainage channel. When the lining body encounters excessive water pressure, the water pressure will squeeze the pressure-bearing block. When the pressure-bearing block is squeezed, it will further squeeze the movable block. When the movable block is squeezed, it will further squeeze the telescopic spring. Under the pressure of the water, the pressure-bearing block will drive the movable block to move downward. At this time, the water outside the lining will flow into the drainage channel through the third water pipe, thereby achieving the purpose of reducing the external water pressure on the lining and thus protecting the lining body.

[0016] 2. The external water pressure relief device for the deep-buried tunnel lining in this water-rich section is constructed by setting up a pressure-bearing block, a movable block, a third water pipe, and a drainage channel. When the water pressure squeezes the pressure-bearing block, the movable block will move, allowing water to flow from the third water pipe into the drainage channel. Simultaneously, as the water outside the lining continuously flows into the drainage channel through the third water pipe, the water pressure outside the lining body will continuously decrease. When the water pressure outside the lining body drops to a certain value, the pressure-bearing block and the movable block, under the elastic action of the telescopic spring, will cause the movable block to block one end of the third water pipe, thus achieving the purpose of protecting the lining body and the groundwater at the same time.

[0017] 3. The external water pressure relief device for the deep buried tunnel lining in the water-rich section is provided by setting a first pressure plate, etc. The first pressure plate is set on the outer surface of the lining body. Since the first pressure plate is composed of two parts, and the upper part of the first pressure plate has a triangular cross section and the lower part has a rectangular cross section, it can strengthen the first pressure plate and protect the lining body at the same time.

[0018] 4. The external water pressure reduction device for the lining of the deep-buried tunnel in the water-rich section, by setting up a second pressure plate, etc., the function of the second pressure plate set between the first pressure plate is to protect the lining body when the water pressure on the lining body is large, and the expansion of the seepage channel behind the lining will cause uneven stress on the lining body. At this time, the second pressure plate can protect the lining body under the action of the second pressure plate, and also reduce the impact force of water pressure on the pressure groove. While protecting the pressure groove, it also serves the purpose of protecting the lining body.

[0019] 5. The external water pressure reduction device for the lining of the deep-buried tunnel in the water-rich section is equipped with a water collection tank, drainage channel, first filter plate, and second filter plate. When water flows into the lining body, the water inside the lining body will enter the water collection tank through the first and second filter plates, and then flow into the drainage channel through the second water pipe. This achieves the purpose of draining the water inside the lining body, preventing water accumulation inside the lining body and affecting the use of the tunnel. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall external water pressure relief device for the lining of the deep-buried tunnel in the Fushuidong section;

[0021] Figure 2 A schematic diagram of the first and second filter plates for the external water pressure reduction device in the lining of a deep-buried tunnel in the Fushuidong section.

[0022] Figure 3 A partial cross-sectional schematic diagram of the external water pressure relief device for the lining of a deep-buried tunnel in the Fushuidong section;

[0023] Figure 4 A schematic diagram of the water collection tank structure for the external water pressure relief device in the lining of the deep-buried tunnel section of the Fushuidong section;

[0024] Figure 5 A side view schematic diagram of the external water pressure relief device for the lining of a deep-buried tunnel in the Fushuidong section;

[0025] Figure 6 A schematic diagram of the pressure-bearing block structure of the external water pressure relief device for the lining of a deep-buried tunnel in the Fushuidong section.

[0026] Figure 7 A schematic diagram of the third water pipe structure for the external water pressure reduction device in the lining of the deep-buried tunnel section of the Fushui Tunnel.

[0027] Reference numerals in the attached drawings: 1. First pressure plate; 2. First water pipe; 3. Lining body; 4. First filter plate; 5. Second filter plate; 6. Water collection trough; 7. Drainage channel; 8. Track support surface; 9. Invert arch; 10. Second pressure plate; 11. Pressure groove; 12. Telescopic spring; 13. Movable block; 14. Pressure block; 15. Second water pipe; 16. Third water pipe. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the 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.

[0029] Example 1:

[0030] Please see Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 The lining body 3 includes a lining body 3. Multiple sets of first pressure plates 1 are arranged around the outer ring of the lining body 3. Multiple sets of second pressure plates 10 are arranged on the side of the first pressure plates 1 that are close to each other. Pressure grooves 11 are provided on both side walls of the lining body 3. Two sets of telescopic springs 12 are provided on the bottom inner wall of the pressure grooves 11. Movable blocks 13 are provided at the other end of the telescopic springs 12. Pressure blocks 14 are provided on the top surface of the movable blocks 13. An arch 9 is provided on the bottom surface of the lining body 3. Water collection troughs 6 are provided on both sides of the top surface of the arch 9. First filter plates 4 and second filter plates 5 are provided on the water collection troughs 6. A drainage channel 7 is provided on the bottom surface of the arch 9. A track support surface 8 is provided on the top surface of the arch 9. When the lining body 3 encounters excessive water pressure, the water pressure will squeeze the pressure blocks 14. When the pressure blocks 14 are squeezed, they will further squeeze the movable blocks 13. When the movable blocks 13 are squeezed, they will further squeeze the telescopic springs. When the spring 12 is compressed, under the pressure of the water, the pressure block 14 will drive the movable block 13 to move downward. At this time, the water outside the lining will flow into the drainage channel 7 through the third water pipe 16, thereby reducing the water pressure outside the lining and protecting the lining body 3. At the same time, when the water pressure compresses the pressure block 14, it will cause the movable block 13 to move, allowing the water to flow from the third water pipe 16 into the drainage channel 7. As the water outside the lining continuously flows into the drainage channel 7 through the third water pipe 16, the water pressure outside the lining body 3 will continue to decrease. When the water pressure outside the lining body 3 decreases to a certain value, the pressure block 14 and the movable block 13, under the elastic action of the extension spring 12, will cause the movable block 13 to block one end of the third water pipe 16, thereby protecting the lining body 3 and the groundwater.

[0031] Example 2:

[0032] Please see Figure 1 , Figure 3 and Figure 5The first bearing plate 1 is arc-shaped and disposed on the outer surface of the lining body 3. The first bearing plate 1 consists of two parts, with a triangular upper cross-section and a rectangular lower cross-section. The second bearing plate 10 is disposed on the outer surface of the lining body 3, positioned close to the two first bearing plates 1. Multiple sets of through holes are formed on one side of the second bearing plate 10, and its cross-section is triangular. The first bearing plate 1, disposed on the outer surface of the lining body 3, is composed of two parts. The upper part of the pressure plate 1 has a triangular cross-section, and the lower part has a rectangular cross-section. This can strengthen the first pressure plate 1 and protect the lining body 3. When the water pressure on the lining body 3 is large, and the expansion of the seepage channel behind the lining can cause uneven stress on the lining, the second pressure plate 10 can protect the lining body 3 and reduce the impact of water pressure on the pressure groove 11. This protects both the pressure groove 11 and the lining body 3.

[0033] Example 3:

[0034] Please see Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 Both sides of the pressure-bearing groove 11 are provided with a third water pipe 16 that penetrates and extends into the drainage channel 7. The third water pipe 16 is L-shaped. One end of the third water pipe 16 located inside the pressure-bearing groove 11 is located above both sides of the pressure-bearing groove 11. Multiple sets of first water pipes 2 are opened at the lower part of the first pressure plate 1. The multiple sets of first water pipes 2 opened at the lower part of the first pressure plate 1 are respectively located on the side of the two second pressure plates 10 that are close to each other. Multiple sets of second water pipes 15 that penetrate and extend into the drainage channel 7 are provided on one side of the water collection groove 6. The second water pipes 15 are set at an inclination.

[0035] Example 4:

[0036] Please see Figure 1 , Figure 3 and Figure 4The top surface of the first filter plate 4 has multiple sets of filter holes penetrating the first filter plate 4, and the top surface of the second filter plate 5 has multiple sets of filter holes penetrating the second filter plate 5. The multiple sets of filter holes in the first filter plate 4 and the second filter plate 5 are all rectangular. The first filter plate 4 is provided with a first clamping plate on both sides, and the second filter plate 5 is provided with a second clamping plate on both sides. The first clamping plates on both sides of the first filter plate 4 and the second clamping plates on both sides of the second filter plate 5 are compatible. The movable block 13 is slidably connected in the pressure-bearing groove 11. The movable block 13 is compatible with the pressure-bearing groove 11. The cross-section of the pressure-bearing block 14 is trapezoidal. When water flows into the lining body 3, the water entering the lining body 3 will enter the water collection tank 6 through the first filter plate 4 and the second filter plate 5, and will flow into the drainage channel 7 through the second water pipe 15. This achieves the purpose of draining the water inside the lining body 3, preventing the water inside the lining body 3 from accumulating and affecting the use of the tunnel.

[0037] The working principle and usage process of this invention are as follows: First, when the lining body 3 encounters excessive water pressure, the water pressure will squeeze the pressure-bearing block 14. When the pressure-bearing block 14 is squeezed, it will further squeeze the movable block 13. When the movable block 13 is squeezed, it will further squeeze the telescopic spring 12. At this time, under the pressure of the water, the pressure-bearing block 14 will drive the movable block 13 to move downward. At this time, the water outside the lining will flow into the drainage channel 7 through the third water pipe 16, thereby reducing the water pressure outside the lining and thus protecting the lining body 3. Furthermore, when water pressure squeezes the pressure-bearing block 14, it causes the movable block 13 to move, allowing water to flow from the third water pipe 16 into the drainage channel 7. Simultaneously, as water continuously flows from the lining into the drainage channel 7 through the third water pipe 16, the water pressure outside the lining body 3 continuously decreases. When the water pressure outside the lining body 3 drops to a certain value, the pressure-bearing block 14 and the movable block 13, under the elastic action of the telescopic spring 12, cause the movable block 13 to block one end of the third water pipe 16. This achieves both protection of the lining body 3 and... The purpose of protecting groundwater is achieved by installing a first bearing plate 1 on the outer surface of the lining body 3. Since the first bearing plate 1 is composed of two parts, with the upper part having a triangular cross-section and the lower part having a rectangular cross-section, it serves to reinforce the first bearing plate 1 and protect the lining body 3. Simultaneously, a second bearing plate 10 is installed between the first bearing plates 1. Its function is to prevent uneven stress on the lining body 3 caused by high water pressure and the expansion of seepage channels behind the lining. Under the action of 10, the lining body 3 can be protected, and the impact force of water pressure on the pressure-bearing groove 11 can be reduced. While protecting the pressure-bearing groove 11, it also serves the purpose of protecting the lining body 3. When water flows into the interior of the lining body 3, the water entering the interior of the lining body 3 will enter the water collection groove 6 through the first filter plate 4 and the second filter plate 5, and will flow into the drainage channel 7 through the second water pipe 15, thereby achieving the purpose of draining the water inside the lining body 3 and preventing the water inside the lining body 3 from accumulating and affecting the use of the tunnel.

[0038] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for reducing external water pressure in the lining of a deep-buried tunnel in a water-rich section, comprising a lining body (3), characterized in that: The outer ring of the lining body (3) is provided with multiple sets of first pressure plates (1), and multiple sets of second pressure plates (10) are provided on the side of the first pressure plates (1) that are close to each other. Both sides of the lining body (3) are provided with pressure grooves (11). The bottom inner wall of the pressure groove (11) is provided with two sets of telescopic springs (12). The other end of the telescopic spring (12) is provided with a movable block (13). The top surface of the movable block (13) is provided with a pressure block (14). The bottom surface of the lining body (3) is provided with an inverted arch (9). Both sides of the top surface of the inverted arch (9) are provided with water collection troughs (6). The water collection troughs (6) are provided with a first filter plate (4) and a second filter plate (5). The bottom surface of the inverted arch (9) is provided with a drainage channel (7). The top surface of the inverted arch (9) is provided with a drainage channel (7). The track support surface (8) is provided. The first pressure plate (1) is arc-shaped and set on the outer surface of the lining body (3). The first pressure plate (1) is composed of two parts. The upper cross section of the first pressure plate (1) is triangular and the lower cross section is rectangular. The second pressure plate (10) is set on the outer surface of the lining body (3). The second pressure plate (10) is set at a position close to the two first pressure plates (1). Multiple sets of through holes are opened on one side surface of the second pressure plate (10). The cross section of the second pressure plate (10) is triangular. Both sides of the pressure groove (11) are provided with a third water pipe (16) that penetrates and extends into the drainage channel (7). The third water pipe (16) is L-shaped. One end of the third water pipe (16) located inside the pressure groove (11) is set above both sides of the pressure groove (11).

2. The external water pressure reduction device for deep-buried tunnel lining in water-rich sections according to claim 1, characterized in that: Multiple sets of first water pipes (2) are provided at the lower part of the first pressure plate (1). The multiple sets of first water pipes (2) provided at the lower part of the first pressure plate (1) are respectively located on the side of the two second pressure plates (10) that are close to each other.

3. The external water pressure reduction device for deep-buried tunnel lining in water-rich sections according to claim 1, characterized in that: The water collection tank (6) has multiple sets of second water pipes (15) that penetrate and extend into the drainage channel (7) on one side, and the second water pipes (15) are arranged at an inclination.

4. The external water pressure reduction device for deep-buried tunnel lining in water-rich sections according to claim 1, characterized in that: The top surface of the first filter plate (4) has multiple sets of filter holes that penetrate the first filter plate (4), and the top surface of the second filter plate (5) has multiple sets of filter holes that penetrate the second filter plate (5). The multiple sets of filter holes in the first filter plate (4) and the second filter plate (5) are all rectangular.

5. The external water pressure reduction device for deep-buried tunnel lining in water-rich sections according to claim 1, characterized in that: The first filter plate (4) is provided with a first card plate on both sides, and the second filter plate (5) is provided with a second card plate on both sides. The first card plates provided on both sides of the first filter plate (4) and the second card plates provided on both sides of the second filter plate (5) are compatible.

6. The external water pressure reduction device for deep-buried tunnel lining in water-rich sections according to claim 1, characterized in that: The movable block (13) is located in the pressure-bearing groove (11) and is slidably connected. The movable block (13) is adapted to the pressure-bearing groove (11), and the cross section of the pressure-bearing block (14) is trapezoidal.

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