A tunnel groundwater limited drainage system based on distributed lining water pressure intelligent regulation and control

Abstract

The application discloses a tunnel underground water limited drainage system based on distributed lining water pressure intelligent regulation and control, which comprises a lining structure, a partitioned drainage system and a partitioned intelligent monitoring and regulation and control system; the partitioned intelligent monitoring and regulation and control system comprises a pressure data acquisition module, a microprocessor and a control module; the pressure data acquisition module comprises an intelligent water pressure monitor and an intelligent pressure detector; the microprocessor is used for receiving data information of the pressure data acquisition module, obtaining underground water drainage time according to data information of a corresponding area and sending an on-off instruction to the control module; and the control module is installed on the partitioned drainage system. The application can perform regional early warning monitoring and partitioned limited drainage on the tunnel, simultaneously monitors internal loads of the lining, achieves internal and external load contact monitoring and pressure relief of the lining, can realize stress optimization of the lining structure and can protect the local ecological environment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tunnel engineering limited drainage, and particularly relates to a tunnel underground water limited drainage system based on distributed lining water pressure intelligent regulation and control. BACKGROUND

[0002] In recent years, with the increasing traffic demand, the development and utilization of underground space has become a new trend of traffic development in China, and therefore various underground engineering construction has also increased accordingly. Whether in coastal areas or mountainous areas, tunnel construction and operation are affected by underground water; therefore, how to deal with the influence of underground water on underground structures and surface ecological environment is very important.

[0003] At present, the treatment measure for underground water is "mainly drainage", allowing underground water to be discharged, which can reduce the influence of water pressure on the stability of tunnel lining structure, simplify the design, and reduce the engineering cost, but based on this concept, it is easy to cause surface water depletion and ecological environment damage. If the "mainly drainage" treatment measure is changed to "mainly plugging", this way greatly increases the engineering cost, increases the construction difficulty, and prolongs the construction period, and through practice, it is almost impossible to completely block the underground water. Therefore, the "limited drainage" concept is of great significance, which allows a part of underground water to be discharged outside the tunnel within the range that the ecological environment can bear, so as to protect the ecological environment and reduce water pressure, thereby reducing the engineering cost and shortening the construction period. The present limited drainage scheme does not solve the problem of uneven stress of lining structure, and cannot specially drain and depressurize the water pressure of a certain position. SUMMARY

[0004] The present application aims to provide a tunnel underground water limited drainage system based on distributed lining water pressure intelligent regulation and control, which realizes tunnel limited drainage, optimizes the stress of lining structure, and protects the local ecological environment.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows: a tunnel underground water limited drainage system based on distributed lining water pressure intelligent regulation and control, comprising a lining structure, a partitioned drainage system, and a partitioned intelligent monitoring and regulation and control system; the partitioned intelligent monitoring and regulation and control system comprises a pressure data acquisition module, a microprocessor, and a control module; the pressure data acquisition module comprises an intelligent water pressure monitor and an intelligent pressure detector, the intelligent water pressure monitor is used for sensing the external water pressure in the region, and the intelligent pressure detector is used for detecting the internal pressure of the lining in the region; the microprocessor is used for receiving the data information of the pressure data acquisition module, obtaining the underground water discharge time according to the data information of the corresponding region, and sending an on-off instruction to the control module; and the control module is installed on the partitioned drainage system.

[0006] Further, the groundwater discharge time acquisition method is:

[0007]

[0008] In the formula, t is the groundwater discharge time; h1 is the groundwater water head height of the region converted according to the intelligent water pressure monitor and the intelligent pressure detector; h0 is the expected groundwater water head height determined in combination with the ecological environment demand, the lining structure bearing capacity and the internal limit bearing stress of the lining; and h2 is the groundwater water head height discharged per unit time.

[0009] Further, the value of the expected groundwater water head height h0 is:

[0010] When h w or h1>h c >h d >h, h0 takes h.

[0011] When h w or h1>h d >h c >h, h0 takes h.

[0012] When h<h1<h w <h d or h c , h0 takes h w .

[0013] When h<h w <h1<h d or h c , h0 takes h1.

[0014] When h w <h<h1<h d or h c , h0 takes h.

[0015] When h w or h1<h<h d or h c , h0 takes h1.

[0016] In the formula, h is the groundwater water head height converted according to the preset pressure; h w is the groundwater water head height required for normal growth of plants according to local survey data and plant characteristic investigation; h c is the groundwater water head height under the limit bearing capacity of the lining; and h d is the groundwater water head height corresponding to the internal pressure under the limit bearing capacity.

[0017] Further, the value of the groundwater water head height h1 of the region converted according to the intelligent water pressure monitor and the intelligent pressure detector is:

[0018] When h a < h b , h1 takes h b ;

[0019] When h a > h b , h1 takes h a ;

[0020] In the formula, h a is the maximum water head height of a certain area converted by the intelligent water pressure monitor at the measuring point of the longitudinal water guide pipe of the partition drainage system and the secondary lining of the lining structure; h b is the maximum water head height of a certain area converted by the intelligent pressure detector according to the relationship between the external water pressure P1 and the internal pressure P2 of the lining structure.

[0021] Further, the relationship between the external water pressure P1 and the internal pressure P2 of the lining structure is:

[0022]

[0023]

[0024]

[0025]

[0026] In the formula, P1 is the external water pressure of a certain area with an area S; P2 is the internal pressure of a certain area of the lining; θ1 is the included angle between the position of P1 and the symmetry center line; θ2 is the included angle between the position of P2 and the symmetry center line; q is the overburden load of the tunnel; R is the radius of the tunnel; g is the self weight of the tunnel; y is the height from the neutral axis; and I is the moment of inertia.

[0027] Further, the lining structure is divided into several areas, each area including, from the outside to the inside, a tunnel primary support, a waterproof layer and a secondary lining; the outside of the tunnel primary support and the outside of the secondary lining of each area are respectively provided with an intelligent water pressure monitor, and the internal reinforcement of the secondary lining of each area is provided with an intelligent pressure detector; a sealing strip is arranged at the boundary of the waterproof layer of each area to ensure that the edge of the waterproof layer is waterproof, thereby realizing partition drainage.

[0028] Further, the partitioned drainage system comprises longitudinal water guide pipes, annular drainage pipes and transverse water outlet pipes, the longitudinal water guide pipes and the annular drainage pipes are arranged between the tunnel primary support and the waterproof layer of each area, the longitudinal water guide pipes of adjacent areas are connected through the annular drainage pipes, the bottom of each annular drainage pipe is connected with a corresponding transverse water outlet pipe, and the annular drainage pipes collect water in the longitudinal water guide pipes and discharge the water into the corresponding transverse water outlet pipes; each transverse water outlet pipe is connected with a central water collecting ditch, and the central water collecting ditch is located at the tunnel bottom inverted arch.

[0029] Further, the control module comprises intelligent water valves, an intelligent water valve a is arranged at each transverse water outlet pipe and located in the inspection shaft; an intelligent water valve b is arranged on the two longitudinal water guide pipes of each area and located around the area.

[0030] Further, the longitudinal water guide pipes are arranged at the arch top, arch shoulder, arch waist and arch bottom of the lining structure and are arranged at intervals of 1-10 m, and the end portions of the longitudinal water guide pipes are sequentially connected through the annular drainage pipes to form a plurality of areas.

[0031] Further, the intelligent water pressure monitor collects water pressure data in real time, the intelligent pressure detector collects pressure data in real time, the water pressure data and the pressure data are sent to the microprocessor, when the water pressure data or the pressure data is greater than a corresponding threshold value, the drainage time is calculated, the microprocessor sends an opening instruction to the intelligent water valve of the area, because the water pressure difference causes water to enter the longitudinal water guide pipe and flow into the annular drainage pipe when the intelligent water valve is opened, and the water is discharged into the central water collecting ditch in the tunnel through the transverse water outlet pipe, when the drainage time is reached, the microprocessor sends a closing instruction to the intelligent water valve of the area to stop drainage.

[0032] The above technical scheme can achieve the following technical effects: based on the distributed concept, the external water pressure of the lining structure is intelligently partitioned and controlled, the external water pressure and the internal stress of the lining of each area are obtained in real time through partitioned intelligent monitoring, the external water pressure and the internal stress of the lining are both converted into water head height, the most appropriate drainage time is obtained by taking both into account, then the external water pressure is removed, the internal pressure of the lining structure is reduced, and safety is ensured; by controlling the opening and closing of the intelligent water valve, intelligent drainage is achieved, automatic partitioned limited drainage and partitioned pressure relief are achieved, and the most unfavorable position is targeted for regulation and control. The stress of the lining structure is optimized, and the local ecological environment is protected. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a longitudinal section form of a lining structure for limited drainage of underground water;

[0034] Figure 2 is a schematic diagram of pipeline distribution of a lining structure for limited drainage of underground water;

[0035] Figure 3 is a smart water pressure monitor, a smart pressure detector and a schematic diagram of the relative position arrangement of secondary lining steel bars;

[0036] Figure 4 is a schematic diagram of water and soil pressure distribution before regulation;

[0037] Figure 5 is a schematic diagram of water and soil pressure distribution after regulation.

[0038] In the figure: 1, initial support of the tunnel; 2, secondary lining; 3, ring-shaped drainage pipe; 4, longitudinal water guide pipe; 5, central water collecting ditch; 6, transverse water outlet pipe; 7, inspection shaft; 8, smart water valve a; 9, smart water pressure monitor; 10, waterproof layer; 11, sealing rubber strip; 12, smart pressure detector; 13, secondary lining steel bar; 14, smart water valve b. DETAILED DESCRIPTION

[0039] The technical solutions of the present application will be described below in conjunction with the accompanying drawings, and it should be understood that the detailed embodiments and specific operation processes described herein are only for the purpose of illustration and explanation of the present application, and are not intended to limit the present application.

[0040] Example 1

[0041] The present embodiment provides a tunnel underground water limited drainage system based on distributed lining water pressure intelligent regulation and control, which comprises a lining structure, a partitioned drainage system and a partitioned intelligent monitoring and control system; the lining structure comprises a tunnel initial support, a waterproof layer and a secondary lining; the partitioned drainage system comprises a sealing rubber strip, a longitudinal water guide pipe, a ring-shaped drainage pipe and a transverse water outlet pipe; the partitioned intelligent monitoring and control system comprises a pressure data acquisition module, a microprocessor and a control module; the pressure data acquisition module comprises a smart water pressure monitor and a smart pressure detector, the microprocessor is used to receive data information of the pressure data acquisition module, obtain underground water drainage time according to data information of the corresponding area, and send switch instructions to the control module; the control module is installed on the partitioned drainage system.

[0042] In the present embodiment, the tunnel initial support of the lining structure is used to support the surrounding rock; the waterproof layer is arranged behind the tunnel initial support and is a kind of anti-seepage material made of high polymer as a basic raw material, which is used for partitioned waterproof and leakage prevention; the secondary lining is a horseshoe-shaped lining for reinforcement support.

[0043] In the present embodiment, in the longitudinal direction of the tunnel, the longitudinal water guide pipes are arranged at intervals of 1-10 m, and in the transverse direction of the tunnel, the ring-shaped drainage pipes sequentially connect the longitudinal water guide pipes to form a plurality of areas. Preferably, the longitudinal water guide pipes are arranged at the crown, spandrel, haunch and soffit, and a total of 11 longitudinal water guide pipes are arranged on the tunnel cross section.

[0044] In the embodiment, the sealing rubber strip is arranged at the waterproof layer boundary of each area to ensure that the edge is not water permeable and to realize partitioned drainage. The longitudinal water guide pipe and the annular drainage pipe are arranged between the tunnel primary support and the waterproof layer of each area, all the longitudinal water guide pipes of each area are connected through the annular drainage pipe, the bottom of each annular drainage pipe is connected with the corresponding transverse water outlet pipe, the annular drainage pipe of each area collects the water in the longitudinal water guide pipe to the corresponding transverse water outlet pipe for drainage, and the transverse water outlet pipe is connected with the central water collecting ditch which is located at the tunnel bottom inverted arch.

[0045] In the embodiment, the intelligent water pressure monitor is arranged outside the tunnel primary support and outside the secondary lining of each area, and the intelligent pressure detector is arranged at the internal steel of the secondary lining of each area; the intelligent water pressure monitor is used for sensing the external water pressure in the area, and the intelligent pressure detector is used for detecting the internal pressure of the lining in the area.

[0046] In the embodiment, the data processing module is in communication connection with the pressure data acquisition module and receives the data information of the pressure data acquisition module, and is used for calculating the groundwater discharge time according to the monitoring data of the corresponding area and the groundwater discharge time algorithm.

[0047] In the embodiment, the microprocessor is used for receiving the data information of the pressure data acquisition module, obtaining the groundwater discharge time according to the data information of the corresponding area, and sending the instruction of opening and closing the intelligent water valve to the control module. When the water pressure of a certain area is too high, the water is collected and discharged through the water pressure difference.

[0048] Embodiment 2

[0049] The embodiment introduces the groundwater discharge time in detail.

[0050]

[0051] In the formula, t is the groundwater discharge time; h1 is the groundwater head height of the area converted according to the intelligent water pressure monitor and the intelligent pressure detector; h0 is the expected groundwater head height determined in combination with the ecological environment demand, the lining structure bearing capacity and the internal limit bearing stress of the lining; and h2 is the unit time discharge groundwater head height.

[0052] The value of h0 in the above formula is as follows:

[0053] When h w or h1>h c >h d >h, h0 takes h.

[0054] When h w or h1>h d >h c >h, h0 takes h.

[0055] When h < h1 < h w h d ; c h w ;

[0056] When h < h1 < h w h d ; c h

[0057] When h w h < h1 < h d h c ;

[0058] When h w h < h1 < h d h c ;

[0059] h is the groundwater head height preset by the data processing system; h w is the groundwater head height required for normal growth of plants according to local survey data and plant characteristics investigation; h c is the groundwater head height under the limit bearing capacity state of the lining; h d is the groundwater head height under the limit bearing capacity state of the lining.

[0060] The value of h1 in the above formula is:

[0061] When h a h b , h1 takes h b ;

[0062] When h a h b , h1 takes h a .

[0063] h a is the maximum water head height of a certain area converted by the intelligent water pressure monitor at the measuring point of the longitudinal water guide pipe and the secondary lining; h b is the maximum water head height of a certain area converted by the intelligent pressure detector inside the lining according to the relationship between the external water pressure P1 and the internal pressure P2 of the lining.

[0064] The relationship between the external water pressure P1 and the internal pressure P2 of the lining is:

[0065]

[0066]

[0067]

[0068]

[0069] In the formula, P2 is the internal pressure of a certain area lining; P1 is the external water pressure of an area with an area of S; θ1 is the included angle between the position of P1 and the symmetry line; θ2 is the included angle between the position of P2 and the symmetry line; q is the load on the tunnel; R is the radius of the tunnel; g is the self weight of the tunnel; y is the height from the neutral axis; and I is the moment of inertia.

[0070] The regulation pressure measure: the intelligent water pressure monitor collects water pressure data in real time, the intelligent pressure detector collects pressure data in real time, the water pressure data and the pressure data are sent to a microprocessor, when the water pressure data or the pressure data is greater than a corresponding threshold value, the drainage time is calculated, the microprocessor sends an opening instruction to the intelligent water valve in the region, because the water pressure difference is in the intelligent water valve when the water enters the longitudinal water guide pipe and flows into the annular drainage pipe, and is discharged into the central water collecting ditch in the tunnel through the horizontal water outlet pipe, when the drainage time is reached, the microprocessor sends a closing instruction to the intelligent water valve in the region, and the drainage is stopped. Satisfy the different drainage needs of each region, real-time monitoring of the lining external water pressure and internal pressure and automatic limited drainage and pressure relief of each region as needed, not only can realize the optimal stress of the lining structure, but also can protect the local ecological environment.

Claims

1. A tunnel groundwater limited discharge system based on intelligent regulation of distributed lining water pressure, characterized in that, The application relates to a tunnel lining structure, a partitioned drainage system and a partitioned intelligent monitoring and control system. The underground water discharge time acquisition mode is as follows: In the formula, is the groundwater discharge time; is the groundwater head height of the area converted according to the intelligent water pressure monitor and the intelligent pressure detector; is the expected groundwater head height determined in combination with the ecological environment demand, the bearing capacity of the lining structure, and the ultimate bearing stress inside the lining. Discharge of groundwater head per unit of time; the desired water head height of the groundwater is determined in the following manner: When or > > > time, take ; When or > > > , take ; When or Take ;​​​​ When or , take ;​​​ When or , take ;​​​ When or or , take ;​​ In the formula, is the groundwater head height according to the preset pressure conversion; is the groundwater head height required for normal growth of plants according to local survey data and plant characteristics investigation; is the groundwater head height under the limit bearing capacity state of the lining; is the groundwater head height corresponding to the internal pressure under the limit bearing capacity state. The value of the groundwater head height in the area according to the intelligent water pressure monitor and the intelligent pressure detector is: When , Take ;​ When > , Take ; In the formula, is the measured point of the secondary lining of the longitudinal water conduit and lining structure of the partitioned drainage system, and is the maximum water head height of a certain area converted by the intelligent water pressure monitor; is the relationship formula, and is the maximum water head height of a certain area converted by the intelligent pressure detector inside the lining structure. is the relationship formula, and is the maximum water head height of a certain area converted by the intelligent pressure detector inside the lining structure. is the relationship formula, and is the maximum water head height of a certain area converted by the intelligent pressure detector inside the lining structure. External water pressure Relationship with internal lining pressure The relationship is: 0< < < < wherein, is the water pressure outside a certain area with an area of ; is the internal pressure of the lining of a certain area; ; is the internal pressure of the lining of a certain area; ; is the angle of the location of ; is the angle of the location of ; is the angle of the location of ; is the angle of the location of ; is the overburden load of the tunnel; ; is the radius of the tunnel; ; is the self-weight of the tunnel; is the height of the distance neutral axis; is the moment of inertia.

2. The tunnel groundwater limited discharge system based on intelligent regulation of distributed lining water pressure according to claim 1, characterized in that, The lining structure is divided into several regions, each region comprising, from outside to inside, a tunnel primary support, a waterproof layer and a secondary lining; the outer side of the tunnel primary support and the outer side of the secondary lining of each region are respectively provided with an intelligent water pressure monitor, and the internal reinforcing steel of the secondary lining of each region is provided with an intelligent pressure detector; a sealing rubber strip is arranged at the boundary of the waterproof layer of each region to ensure that the edge of the waterproof layer is waterproof, thereby realizing partitioned drainage.

3. The tunnel groundwater limited discharge system based on intelligent regulation of distributed lining water pressure according to claim 2, characterized in that, The partitioned drainage system comprises longitudinal water guide pipes, annular drainage pipes and transverse water outlet pipes; the longitudinal water guide pipes and the annular drainage pipes are arranged between the tunnel primary support and the waterproof layer of each region, the longitudinal water guide pipes of adjacent regions are connected through the annular drainage pipes, the bottom of each annular drainage pipe is connected with a corresponding transverse water outlet pipe, the annular drainage pipe collects water in the longitudinal water guide pipes and discharges the water into the corresponding transverse water outlet pipe; each transverse water outlet pipe is connected with a central water collecting ditch, and the central water collecting ditch is located at the tunnel bottom inverted arch.

4. The tunnel groundwater limited discharge system based on intelligent regulation of distributed lining water pressure according to claim 1, characterized in that, The control module comprises an intelligent water valve, an intelligent water valve a is arranged at each transverse water outlet pipe and located in an inspection shaft; an intelligent water valve b is arranged on the two longitudinal water guide pipes of each region and located around the region.

5. The tunnel groundwater limited discharge system based on intelligent regulation of distributed lining water pressure according to claim 3, characterized in that, The longitudinal water guide pipes are arranged at the arch crown, arch shoulder, arch waist and arch bottom of the lining structure and are arranged at intervals of 1-10 m; the end portions of the longitudinal water guide pipes are sequentially connected through the annular drainage pipes to form several regions.

6. The tunnel groundwater limited discharge system based on intelligent regulation of distributed lining water pressure according to claim 1, characterized in that, The intelligent water pressure monitor collects water pressure data in real time, the intelligent pressure detector collects pressure data in real time, the water pressure data and the pressure data are sent to the microprocessor, when the water pressure data or the pressure data is greater than a corresponding threshold value, the drainage time is calculated, the microprocessor sends an opening instruction to the intelligent water valve of the region, water enters the longitudinal water guide pipe and flows into the annular drainage pipe when the intelligent water valve is opened due to the water pressure difference, the water is discharged into the central water collecting ditch in the tunnel through the transverse water outlet pipe, when the drainage time is reached, the microprocessor sends a closing instruction to the intelligent water valve of the region to stop drainage.

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