An adaptive guide pier system for urban deep drainage main branch tunnel intersection

Abstract

The application discloses a kind of self-adapting flow guide pier systems for the intersection of urban deep drainage main branch tunnel, including first flow guide pier and second flow guide pier, first flow guide pier and second flow guide pier are respectively arranged at the two ends of branch tunnel exit and extend into main tunnel, first flow guide pier and second flow guide pier are all connected with driving executive mechanism, the two sides of first flow guide pier and second flow guide pier are all provided with dynamic water pressure sensor, the top of first flow guide pier and second flow guide pier is also provided with water level monitor, dynamic water pressure sensor and water level monitor are all electrically connected with driving executive mechanism, for first flow guide pier and second flow guide pier adaptive posture and height adjustment.The application has real-time sensing and adaptive adjustment capability, can adapt to flow variation condition under different rainfall intensity, to optimize converging flow regime, reduce energy loss, enhance structural durability, guarantee the structural safety and efficient operation of deep drainage tunnel intersection.

Description

Technical Field

[0001] This invention belongs to the field of deep drainage tunnel technology, and particularly relates to an adaptive flow guide pier system for the intersection of main and branch tunnels in urban deep drainage. Background Technology

[0002] With the acceleration of urbanization, in order to cope with the increasingly severe urban flooding problem, the construction of deep drainage tunnels has become a consensus in many large cities. These tunnels are usually deep and large in scale, consisting of one or more main tunnels and numerous branch tunnels forming a network. The intersection of the main and branch tunnels is the key node of the entire system, and the smoothness of the water flow connection directly determines the overall performance of the system. The applicant discovered that during sudden heavy rainfall, urban deep drainage systems are prone to problems such as water flow impact, turbulence, vortices, significant energy loss, and intensified structural erosion at the junction of the main tunnel and branch tunnels, which seriously affect the drainage efficiency and structural safety of the deep tunnel system. The main core technical problems are as follows: (1) The water flow impact is severe and the structural safety risk is high. When the branch tunnel merges into the main tunnel at a large angle (especially close to 90°), the high-speed water flow will directly impact the inner wall of the main tunnel, generating huge impact force and dynamic water pressure. Under long-term action, it is easy to cause the tunnel lining structure to crack, peel off or even be destroyed, threatening the safety of the project. (2) Turbulent water flow and low water conveyance efficiency. When the water flow in the branch tunnel meets the water flow in the main tunnel, strong vortices, backflows and surges will be generated due to the sudden change in flow direction. In severe cases, the surges can roll to the top of the tunnel, causing the phenomenon of "water flow sealing the top". This not only greatly increases the head loss and reduces the overall water conveyance and flood discharge efficiency of the system, but may also block the flow section. (3) Existing technologies mostly use fixed arc-shaped guide piers to improve the flow pattern. However, the water volume of the deep tunnel drainage system changes dynamically with the rainfall intensity, and the working conditions are complex and changeable. Fixed arc-shaped guide piers are difficult to adapt to the dynamic changes in flow, resulting in low drainage and diversion efficiency. In addition, it is impossible to adjust the guide piers in real time according to the actual water flow conditions, making it difficult to carry out preventive work. In the existing technology, such as Chinese invention patent CN119824863A, a method for constructing a water conveyance tunnel intersection and a water confluence system are disclosed. This solution guides the water flow in the branch tunnel to smoothly flow into the main channel by setting a fixed arc-shaped guide pier tangent to the axis of the main tunnel at the end of the branch tunnel. Its structure is simple and easy to construct, and it can effectively improve the problem of water flow jacking under specific design conditions. However, its inventive concept is essentially a passive and static solution, which cannot cope with the complex working conditions of dynamic and drastic changes in flow rate and velocity in deep tunnel drainage systems. For example, Chinese invention patent CN113152360A discloses a smart adjustment and optimization flow field guiding device and its application in river confluence. This solution uses the unbalanced impact force of the water flow itself to drive a fish-mouth-shaped guide to swing around a fixed axis, thereby automatically balancing the outlet flow velocity of the two river channels. It does not require external energy, but its working principle depends on the direct impact of the incoming flow from both sides. It is suitable for open river confluence scenarios, but it is difficult to directly apply to deep drainage tunnel intersection environments with limited space and complex water flow. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an adaptive flow guide pier system for the intersection of main and branch tunnels in urban deep drainage. This system has real-time sensing and adaptive adjustment capabilities, and can adapt to the drastic flow changes under different rainfall intensities, so as to optimize the flow pattern, reduce energy loss, enhance structural durability, and ensure the structural safety and efficient operation of the intersection of deep drainage tunnels.

[0004] The objective of this invention is achieved through the following technical solution: An adaptive guide pier system for the intersection of main and branch tunnels in urban deep drainage is provided. The system comprises a first guide pier and a second guide pier, which are respectively located at the two ends of the branch tunnel outlet and extend into the main tunnel. Both the first and second guide piers are connected to a drive actuator. Dynamic water pressure sensors are installed on both sides of the first and second guide piers, and a water level monitor is installed on the top of each pier. Both the dynamic water pressure sensors and the water level monitor are electrically connected to the drive actuator, enabling the first and second guide piers to adaptively adjust their attitude and height.

[0005] In one embodiment, the attitude adjustment of the first guide pier or the second guide pier includes: Real-time acquisition of the dynamic water pressure on the left and right sides of the first and second guide piers; Based on the ratio of the dynamic water pressure on the left to the dynamic water pressure on the right, adjust the angle between the first guide pier and the main tunnel axis and the angle between the second guide pier and the main tunnel axis.

[0006] In one embodiment, the height adjustment of the first guide pier and the second guide pier includes: The height of the first and second guide piers is adjusted by driving the actuator so that the tops of the first and second guide piers are always at the same height as the liquid surface.

[0007] In one embodiment, the drive actuator includes a hydraulic rod connected to the guide block body of the first guide block or the second guide block. The bottom of the hydraulic rod is connected to a hydraulic cylinder, which is connected to an oil inlet pipe and an oil outlet pipe. The hydraulic cylinder is also connected to a servo motor through a gear transmission mechanism.

[0008] In one embodiment, the inner side of the hydraulic cylinder is further provided with a keyway, and the outer side of the hydraulic rod is provided with a hydraulic rod groove that mates with the keyway.

[0009] In one embodiment, the bottom of the guide block body is provided with a slotted hole that mates with the groove of the hydraulic rod, and a guide block keyway is also provided in the slotted hole, with a reserved gap between the guide block keyway and the groove of the hydraulic rod.

[0010] In one embodiment, a waterproof rubber sleeve is also fitted around the hydraulic rod along its circumference, with the top of the waterproof rubber sleeve contacting the guide pier body and the bottom of the waterproof rubber sleeve contacting the concrete structure.

[0011] In one embodiment, sealing rings are provided at the gaps between the waterproof rubber sleeve and the guide pier body, as well as at the gaps between the waterproof rubber sleeve and the concrete structure.

[0012] In one embodiment, the system further includes a controller, which, along with the servo motor, is housed within the concrete structure. The controller is connected via control lines to the servo motor, the dynamic water pressure sensor, the water level monitor, the oil inlet pipe, and the oil outlet pipe, respectively.

[0013] In one embodiment, a rolling bearing is also provided within the concrete structure, and the bottom of the hydraulic cylinder is connected to the rolling bearing.

[0014] The beneficial effects of this invention are as follows: (1) The present invention integrates the sensing unit, the actuator and the controller to build a complete closed-loop system of "sensing-analysis-execution-feedback" to realize full-process automation from water flow state monitoring to adaptive adjustment of flow guidance attitude.

[0015] (2) In view of the limited space and complex water flow of deep drainage tunnels, the structure of the guide pier and the layout of the actuator are optimized. The attitude of the guide pier is dynamically adjusted based on the real-time monitoring of dynamic water pressure and water level parameters to adapt to the drastic flow conditions under different rainfall intensities. It is applicable to deep drainage systems with various main and branch tunnel intersection angles (including close to 90°). Attached Figure Description

[0016] The invention will now be described in more detail with reference to embodiments and the accompanying drawings. Figure 1 A schematic diagram of the guide pier structure of the present invention is shown; Figure 2 A schematic diagram (top view) of the guide pier structure of the present invention is shown. Figure 3 Showing Figure 1 Schematic diagram of the cross-sectional structure at point II; Figure 4 A schematic diagram of the bottom structure of the guide pier of the present invention is shown; Figure 5 A schematic diagram of the hydraulic rod of the present invention is shown; Figure 6 A schematic diagram of the hydraulic cylinder of the present invention is shown; Figure 7 A schematic diagram of the flow guide pier system of the present invention is shown; Figure 8 A schematic diagram of the installation of the dynamic water pressure sensor of the present invention is shown; In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0017] Figure label: 100-First guide pier, 200-Second guide pier, 1-Guide pier body, 2-Dynamic water pressure sensor, 3-Water level monitor, 4-Waterproof rubber sleeve, 5-Hydraulic rod, 6-Oil outlet pipe, 7-Gear transmission mechanism, 8-Hydraulic cylinder, 9-Oil inlet pipe, 10-Rolling bearing, 11-Servo motor, 12-Controller, 13-Concrete structure, 14-Control circuit, 15-Sealing ring, 16-Reserved gap, 17-Slotted hole, 18-Guide pier keyway, 19-Hydraulic rod groove, 20-Hydraulic cylinder keyway, 21-Main tunnel, 22-Branch tunnel, 23-Tunnel invert, 201-Left-side dynamic water pressure sensor, 202-Right-side dynamic water pressure sensor. Detailed Implementation

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] This invention provides an adaptive diversion pier system for the intersection of main and branch tunnels in urban deep drainage systems, installed at the intersection of the main tunnel 21 and the branch tunnel 22, such as... Figure 1 and Figure 7As shown, it includes a first guide pier 100 and a second guide pier 200. The first guide pier 100 and the second guide pier 200 are respectively set at both ends of the outlet of the branch tunnel 22 and extend into the main tunnel 21. The first guide pier 100 and the second guide pier 200 are both connected to a drive actuator. The first guide pier 100 and the second guide pier 200 are both equipped with dynamic water pressure sensors 2 on both sides. The first guide pier 100 and the second guide pier 200 are also equipped with water level monitors 3 on their tops. The dynamic water pressure sensors 2 and the water level monitors 3 are both electrically connected to the drive actuators so that the first guide pier 100 and the second guide pier 200 can perform adaptive attitude and height adjustments. Specifically, the attitude adjustment of the first guide pier 100 or the second guide pier 200 includes: Real-time acquisition of the left and right dynamic water pressures of the first guide pier 100 and the second guide pier 200; Based on the ratio of the dynamic water pressure on the left to the dynamic water pressure on the right, the angle between the first guide pier 100 and the axis of the main tunnel 21 and the angle between the second guide pier 200 and the axis of the main tunnel 21 are adjusted respectively. The height adjustment of the first guide pier 100 and the second guide pier 200 includes: The height of the first guide pier 100 and the second guide pier 200 is adjusted by driving the actuator so that the top of the first guide pier 100 and the second guide pier 200 are always at the same height as the liquid surface. It should be noted that, as Figure 7 and Figure 8 As shown, taking a 45° angle between the main tunnel 21 and the branch tunnel 22 as an example: The angle between the first guide pier 100 and the water flow direction of the main tunnel 21 is α, and the angle between the second guide pier 200 and the water flow direction of the main tunnel 21 is β. The average hourly pressure measured by the dynamic water pressure sensor 201 on the left side of the guide pier body 1 of the first guide pier 100 and the second guide pier 200 is... The average pressure measured by the right-side hydrodynamic pressure sensor 202 is: That is, when the angle between the main tunnel 21 and the branch tunnel 22 is 45°, based on the ratio of the hydrodynamic pressure on the left to the hydrodynamic pressure on the right. The angles of the guide pier bodies 1 of the first guide pier 100 and the second guide pier 200 are adjusted as shown in the table below:

[0020] As shown in the table above, when the angle between the main tunnel 21 and the branch tunnel 22 is 45°, the ratio of the hydrodynamic pressure on the left to the hydrodynamic pressure on the right is used to determine the hydrodynamic pressure. The angles of α and β that fall within the interval are adjusted by the table above and Figure 7It can be seen that when the water volume is small, the guide pier body 1 maintains a small deflection angle to guide the water flow in the branch tunnel to flow smoothly into the main tunnel. When the water volume increases, the water flow impact pressure rises, or the water level approaches the top of the tunnel, the system automatically increases the deflection angle of the guide pier to further optimize the water flow streamline, reduce vortices and backflow, and avoid the water flow from hitting the main tunnel wall and the occurrence of "water flow sealing". When the rainfall weakens and the water volume decreases, the system reverses the adjustment of the guide pier angle to restore the optimal posture suitable for low flow conditions. For tunnel structures where the included angle between the main tunnel 21 and the branch tunnel 22 is other than this, the ratio of the dynamic water pressure on the left to the dynamic water pressure on the right can also be used. The angles of α and β are adjusted according to the range they fall into. The specific angle values ​​that need to be adjusted can be determined by those skilled in the art based on the actual situation on site. It should be noted that in this embodiment, the water flow rate in the deep tunnel is monitored in real time by the dynamic water pressure sensor 2 set on the left and right sides of the diversion pier body 1 and the water level monitoring instrument 3 on its top. The height and angle of the first diversion pier 100 and the second diversion pier 200 are adjusted in real time to keep the top of the diversion pier consistent with the liquid level while reducing the water flow impact of the branch tunnel 22. This is to adapt to the drastic flow rate changes under different rainfall intensities, that is, to optimize the confluence flow pattern, reduce energy loss, and enhance structural durability, thereby ensuring the structural safety and efficient operation of the deep drainage tunnel junction. Furthermore, such as Figure 1 and Figure 2 As shown, the drive actuator includes a hydraulic rod 5 connected to the guide pier body 1 of the first guide pier 100 or the second guide pier 200. The bottom of the hydraulic rod 5 is connected to a hydraulic cylinder 8. The hydraulic cylinder 8 is connected to an oil inlet pipe 9 and an oil outlet pipe. The hydraulic cylinder 8 is also connected to a servo motor 11 through a gear transmission mechanism 7. That is, the hydraulic cylinder 8 is used to adjust the height between the guide pier and the tunnel invert arch 23. The servo motor 11 drives the gear transmission mechanism 7 to rotate the hydraulic cylinder 8 in order to adjust the angle of the guide pier. Specifically, such as Figure 5 and Figure 6 As shown, the hydraulic cylinder 8 is provided with a hydraulic cylinder keyway 20 on its inner side, and the hydraulic rod 5 is provided with a hydraulic rod groove 19 on its outer side that cooperates with the hydraulic cylinder keyway 20. That is, the hydraulic cylinder keyway 20 and the hydraulic rod groove 19 cooperate with each other to realize torque transmission and ensure the stability of power. The hydraulic cylinder 8 is connected to the oil inlet pipe 9 and the oil outlet pipe 6 to realize the input and discharge of hydraulic oil, thereby driving the hydraulic rod 5 to extend and retract up and down. Furthermore, such as Figure 3 and Figure 4As shown, the bottom of the guide pier body 1 is provided with a slotted hole 17 that mates with the groove 19 of the hydraulic rod. A guide pier keyway 18 is also provided in the slotted hole 17. There is a reserved gap 16 between the guide pier keyway 18 and the groove 19 of the hydraulic rod. It should be noted that the slotted hole 17 at the bottom of the guide pier body 1 cooperates with the hydraulic rod groove 19 to realize power transmission and positioning. The reserved gap 16 between the guide pier keyway 18 in the slotted hole 17 and the hydraulic rod groove 19 allows the guide pier body 1 to make slight swing self-adjustment under the action of turbulence, improving its self-adaptability and protecting it at the same time. In one embodiment, such as Figure 1 As shown, a waterproof rubber sleeve 4 is also fitted around the hydraulic rod 5 along its circumference. The top of the waterproof rubber sleeve 4 contacts the guide pier body 1, and the bottom of the waterproof rubber sleeve 4 contacts the concrete structure 13. Furthermore, sealing rings 15 are provided at the gaps between the waterproof rubber sleeve 4 and the guide pier body 1, as well as at the gaps between the waterproof rubber sleeve 4 and the concrete structure 13, to prevent water from seeping into the equipment and to protect the internal components of the equipment. Furthermore, such as Figure 1 As shown, it also includes a controller 12. The controller 12 and the servo motor 11 are both installed in the concrete structure 13. The controller 12 is connected to the servo motor 11, the dynamic water pressure sensor 2, the water level monitor 3, the oil inlet pipe 9 and the oil outlet pipe 6 through the control line 14. That is, the sensing device, the drive actuator and the controller 12 are highly integrated to build a complete closed-loop system of "sensing-analysis-execution-feedback". This realizes the full-process automation from water flow state monitoring to adaptive adjustment of the flow guiding attitude, and solves the problem of lack of autonomous sensing and closed-loop feedback in the existing technology. Furthermore, such as Figure 1 As shown, a rolling bearing 10 is also installed inside the concrete structure 13. The bottom of the hydraulic cylinder 8 is connected to the rolling bearing 10. That is, the friction of the guide pier during the adjustment process is reduced by the rolling bearing 10 installed inside the concrete structure 13.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. An adaptive flow guide pier system for the intersection of main and branch tunnels in urban deep drainage, characterized in that, The system includes a first guide pier and a second guide pier, which are respectively located at both ends of the branch tunnel exit and extend into the main tunnel. Both the first guide pier and the second guide pier are connected to a drive actuator. Both sides of the first guide pier and the second guide pier are equipped with dynamic water pressure sensors, and the top of the first guide pier and the second guide pier are also equipped with a water level monitor. Both the dynamic water pressure sensors and the water level monitor are electrically connected to the drive actuator to enable the first guide pier and the second guide pier to perform adaptive attitude and height adjustments.

2. The adaptive guide pier system for the intersection of main and branch tunnels in urban deep drainage according to claim 1, characterized in that, The attitude adjustment of the first or second guide pier includes: Real-time acquisition of the dynamic water pressure on the left and right sides of the first and second guide piers; Based on the ratio of the dynamic water pressure on the left to the dynamic water pressure on the right, adjust the angle between the first guide pier and the main tunnel axis and the angle between the second guide pier and the main tunnel axis.

3. The adaptive guide pier system for the intersection of main and branch tunnels in urban deep drainage according to claim 1, characterized in that, The height adjustment of the first guide pier and the second guide pier includes: The height of the first and second guide piers is adjusted by driving the actuator so that the tops of the first and second guide piers are always at the same height as the liquid surface.

4. The adaptive guide pier system for the intersection of main and branch tunnels in urban deep drainage according to claim 1, characterized in that, The drive actuator includes a hydraulic rod connected to the body of the first or second guide pier. A hydraulic cylinder is connected to the bottom of the hydraulic rod. The hydraulic cylinder is connected to an oil inlet pipe and an oil outlet pipe. The hydraulic cylinder is also connected to a servo motor through a gear transmission mechanism.

5. The adaptive guide pier system for the intersection of main and branch tunnels in urban deep drainage according to claim 4, characterized in that, The hydraulic cylinder is provided with a keyway on its inner side, and the hydraulic rod is provided with a hydraulic rod groove on its outer side that mates with the keyway.

6. The adaptive guide pier system for the intersection of main and branch tunnels in urban deep drainage according to claim 5, characterized in that, The bottom of each guide pier body is provided with a slotted hole that mates with the groove of the hydraulic rod. A guide pier keyway is also provided in the slotted hole, and a reserved gap exists between the guide pier keyway and the groove of the hydraulic rod.

7. The adaptive guide pier system for the intersection of main and branch tunnels in urban deep drainage according to claim 4, characterized in that, A waterproof rubber sleeve is also fitted around the hydraulic rod along its circumference. The top of the waterproof rubber sleeve contacts the body of the guide pier, and the bottom of the waterproof rubber sleeve contacts the concrete structure.

8. The adaptive guide pier system for the intersection of main and branch tunnels in urban deep drainage according to claim 7, characterized in that, Sealing rings are provided at the gaps between the waterproof rubber sleeve and the guide pier body, as well as at the gaps between the waterproof rubber sleeve and the concrete structure.

9. The adaptive guide pier system for the intersection of main and branch tunnels in urban deep drainage according to claim 7, characterized in that, It also includes a controller, which, along with the servo motor, is housed within the concrete structure. The controller is connected to the servo motor, the dynamic water pressure sensor, the water level monitor, the oil inlet pipe, and the oil outlet pipe via control lines.

10. An adaptive guide pier system for the intersection of main and branch tunnels in urban deep drainage, as described in claim 7, is characterized in that... The concrete structure is also equipped with a rolling bearing, and the bottom of the hydraulic cylinder is connected to the rolling bearing.

Images