Construction process of water tunnel large slope inclined shaft drainage system and drainage system

Abstract

The application discloses a construction process of a water conservancy tunnel large-gradient inclined shaft drainage system and the drainage system, relates to the inclined shaft drainage field, and discloses the drainage system which comprises a plurality of water collecting sumps arranged along the length direction of the inclined shaft, corresponding pump stations arranged in the water collecting sumps, pump water pipes arranged between adjacent water collecting sumps, a water inlet end of the pump water pipe connected with the pump station close to the bottom of the inclined shaft, and a water outlet end of the pump water pipe located in the water collecting sump close to the top of the inclined shaft. The water collecting sump close to the top of the inclined shaft is communicated with a sewage treatment system located outside the inclined shaft. The plurality of water collecting sumps are communicated with a water dispersing and collecting system in the inclined shaft. The application can avoid the water level difference between high and low underground water levels, the large-gradient deep inclined shaft construction in the broken surrounding rock geology, the construction efficiency reduction caused by the seepage water and other factors, and the poor construction quality and other adverse factors, and can greatly reduce the safety accidents such as the water-rich geology, the surrounding rock softening, the structure surface slip, the collapse and the electric shock.

Description

Technical Field

[0001] This invention relates to the field of inclined shaft drainage, and in particular to a construction process and drainage system for a steep inclined shaft drainage system in a hydraulic tunnel. Background Technology

[0002] Balancing and ensuring construction progress, quality, and safety during the construction of hydraulic inclined shafts presents a new challenge.

[0003] For the drainage of inclined shafts with large slopes in hydraulic engineering, the slope of the inclined shaft creates a water level difference between the high and low groundwater levels. During the construction of deep and long inclined shafts with large slopes in fractured surrounding rock geology, factors such as water leakage are prone to occur, resulting in reduced efficiency of machinery and personnel, poor welding and spraying quality, and other adverse effects. In water-rich geology, softened surrounding rock, and slippage of structural surfaces, there is a risk of collapse and electric shock accidents caused by water. Therefore, the construction technology of inclined shaft drainage is the key point and challenge to ensure the safety, progress and quality of inclined shaft construction. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems by providing a construction process and drainage system for a large-slope inclined shaft drainage system in hydraulic tunnels. This system can avoid adverse factors such as reduced construction efficiency and poor construction quality caused by factors like water level differences between high and low groundwater levels and the presence of seepage water during the construction of large-slope deep and long inclined shafts in fractured surrounding rock geology. It can also greatly reduce the risk of safety accidents such as collapses and electric shocks caused by water-rich geology, softened surrounding rock, and slippage of structural surfaces.

[0005] The technical solution adopted in this invention is as follows: A construction process for a drainage system of a steeply inclined shaft in a hydraulic tunnel, comprising the following steps:

[0006] S1: Construct a sewage treatment system outside the inclined shaft;

[0007] S2: Excavate a longitudinal intercepting ditch at the working face and lay a drainage pipe between the longitudinal intercepting ditch and the sewage treatment system. The drainage pipe will divert the water in the longitudinal intercepting ditch to the sewage treatment system.

[0008] S3: Drill a water intake hole ahead of the working face, install a water intake pipe in the water intake hole, and divert water to the longitudinal intercepting ditch. While excavating, pump out the water in the longitudinal intercepting ditch.

[0009] S4: During the inclined shaft excavation process, transverse intercepting ditches are laid at intervals to collect the scattered water into the longitudinal intercepting ditch.

[0010] S5: After the working face has advanced to the set depth, the water collection chamber is excavated. The water collection chamber is connected to the longitudinal intercepting ditch, and a pumping station is built inside the water collection chamber.

[0011] S6: repeating steps S3-S5 to build a pump pipe between adjacent water collecting sumps to form a multi-stage pump station relay drainage until the inclined shaft is constructed to the target position.

[0012] Further, in step S2 or / and step S3, the longitudinal water intercepting trench moves with the movement of the working face.

[0013] Further, in step S5, the construction position of the water collecting sump or / and the pump station is determined according to the slope of the inclined shaft or / and the height difference between the shaft mouth and the shaft bottom, and the type of the water pump in the pump station, so as to determine the number of stages of the pump station.

[0014] Further, the pump station is provided with at least one water pump, and the type of the water pump is determined according to the slope of the inclined shaft or / and the height difference between the shaft mouth and the shaft bottom, and the maximum drainage capacity of the inclined shaft.

[0015] A water tunnel large slope inclined shaft drainage system is formed by the construction process, comprising a plurality of water collecting sumps arranged along the length direction of the inclined shaft, a corresponding pump station is arranged in each water collecting sump, a pump pipe is arranged between adjacent water collecting sumps, the water inlet end of the pump pipe is connected with the pump station near the shaft bottom, and the water outlet end of the pump pipe is located in the water collecting sump near the shaft mouth; the water collecting sump near the shaft mouth is communicated with a sewage treatment system located outside the inclined shaft; a plurality of water collecting sumps are communicated with a water dispersing and collecting system in the inclined shaft.

[0016] Further, the sewage treatment system comprises a buffer tank, a first sedimentation tank, a dosing chamber and a second sedimentation tank, the water collecting sump is connected with the water inlet of the buffer tank, the water outlet of the buffer tank is connected with the first sedimentation tank through a water collecting ditch, the dosing chamber is arranged at the first sedimentation tank, the first sedimentation tank is connected with the second sedimentation tank through a water channel, and the water outlet of the second sedimentation tank is connected with a water collecting pool.

[0017] Further, the shape of the water collecting ditch is serpentine.

[0018] Further, the water dispersing and collecting system comprises a plurality of longitudinally spaced transverse water intercepting ditches and a longitudinal water intercepting ditch located on one side or both sides of the transverse water intercepting ditch, the transverse water intercepting ditches are communicated with the longitudinal water intercepting ditch; and the longitudinal water intercepting ditch is communicated with the water collecting sump.

[0019] Further, the transverse water intercepting ditch is a rectangular groove for transverse pre-buried in the bottom surface of the inclined shaft, the rectangular groove is composed of a bottom plate and upper slope side steel plates and lower slope side steel plates located on both sides of the bottom plate, and a plurality of water seepage holes are formed in the upper slope side steel plates.

[0020] Further, the lower slope side steel plate is fixed with a cable steel pipe.

[0021] To sum up, due to the adoption of the technical scheme, the application has the beneficial effects of:

[0022] 1、The application combines the large slope inclined shaft drainage and the sewage treatment system effectively, forms an independent inclined shaft drainage system with the pump station relay pumping, can improve the inclined shaft drainage efficiency of the rich water large slope inclined shaft, especially the sewage generated during the inclined shaft construction is discharged after treatment, which is of great significance to environmental protection;

[0023] 2、The application adopts the inclined shaft pumping construction process combining the face advanced drilling water diversion, longitudinal water interception and transverse water interception diversion auxiliary drainage, can avoid the adverse factors such as the decrease of mechanical and personnel operation efficiency, poor welding and spraying quality caused by seepage water and other factors in the construction of the large slope deep inclined shaft with high and low groundwater levels and broken surrounding rock geology, can greatly reduce the safety accidents caused by water such as rich water geology, surrounding rock softening, structure surface slip and collapse, electric shock and the like;

[0024] 3、The transverse water interception trench proposed in the application can intercept the seepage water flowing to the face during the inclined shaft construction, realize the purpose of reducing the water scouring of the face and the branch hole, supporting the transportation track, reducing the possibility of settlement of the transportation track, reducing the work load of the construction personnel, and giving a good construction environment;

[0025] 4、The application can continuously, efficiently and orderly drain the large slope inclined shaft by setting the multi-stage pump station relay drainage, improve the drainage efficiency, reduce the water operation difficulty, reduce the safety risks such as the inclined shaft flooding, collapse and electric shock caused by water, increase the safety of the underground excavation inclined shaft construction, improve the construction quality, speed up the construction progress, and bring immeasurable benefits. BRIEF DESCRIPTION OF DRAWINGS

[0026] The application will be described by examples and with reference to the accompanying drawings, in which:

[0027] Figure 1 is the construction process diagram of the drainage system disclosed by the application;

[0028] Figure 2 is the structure arrangement top view of the drainage system disclosed by the application;

[0029] Figure 3 is the structure arrangement side view of the drainage system disclosed by the application;

[0030] Figure 4 is the structure schematic view of the sewage treatment system disclosed by the application;

[0031] Figure 5 is the structure schematic view of the buffer tank disclosed by the application;

[0032] Figure 6 A structural layout of the water collection system disclosed in the present application;

[0033] Figure 7 Another structural layout of the water collection system disclosed in the present application;

[0034] Figure 8 A structural schematic diagram of the transverse water intercepting trench disclosed in the present application;

[0035] Marked in the figure: 1-pump station; 2-water collecting chamber; 3-water collection system; 31-longitudinal water intercepting trench; 32-transverse water intercepting trench; 3211-steel plate on uphill side; 3212-end face sealing plate; 3213-steel plate on downhill side; 322-water seepage hole; 323-cable steel pipe; 4-sewage treatment system; 41-buffer water tank; 411-float; 412-float valve; 42-water intercepting trench; 43-first sedimentation tank; 44-dosing room; 45-water channel; 46-second sedimentation tank; 47-water collecting pool. DETAILED DESCRIPTION

[0036] All features disclosed in this specification, and / or all steps of any methods or processes disclosed in this specification, can be combined in any manner, except where features or steps are mutually exclusive.

[0037] Any feature disclosed in this specification, unless stated otherwise, can be replaced by any other feature serving the same, or a similar, purpose.

[0038] As Figures 1-8 shown in the figure, a construction process of a water tunnel large slope inclined shaft drainage system, comprising the following steps:

[0039] S1: a sewage treatment system 4 is built outside the inclined shaft, the sewage treatment system 4 is used for treating sewage in the inclined shaft, so that the sewage reaches the discharge standard, and the influence on the environment is reduced;

[0040] S2: a longitudinal water intercepting trench 31 is excavated at the working face, a drainage pipe is laid between the longitudinal water intercepting trench 31 at the shaft mouth and the sewage treatment system 4, the drainage pipe drains water in the longitudinal water intercepting trench 31 to the sewage treatment system 4, the longitudinal water intercepting trench 31 collects scattered water in the inclined shaft, and the scattered water is introduced into the water collecting chamber 2;

[0041] S3: a water diversion hole is formed by advanced drilling at the working face, a water diversion pipe is installed in the water diversion hole, the water diversion pipe drains water to the longitudinal water intercepting trench 31, water in the longitudinal water intercepting trench 31 is drained and discharged while excavating, groundwater at high water level is drained in advance before the inclined shaft is excavated, and the adverse effects of groundwater on the working face construction are reduced;

[0042] S4: During the process of inclined shaft excavation, the transverse water collecting ditch 32 is laid at intervals, which collects the scattered water into the longitudinal water collecting ditch 31, and the transverse water collecting ditch 32 collects the scattered water and the underground seepage water;

[0043] S5: After the face footage reaches the set depth, the water collecting sump 2 is excavated, which is communicated with the longitudinal water collecting ditch 31, and the pump station 1 is built in the water collecting sump 2;

[0044] S6: Repeat steps S3-S5, and the water pumping pipe is constructed between the adjacent water collecting sumps 2 to form a multi-stage pump station 1 for relay drainage, until the inclined shaft is constructed to the target position, so as to realize the multi-stage pump station 1 drainage, and ensure the stable and continuous drainage.

[0045] As shown in Figures 1-3 For the current technology of inclined shaft construction, the first point is that in the embodiment, the sewage treatment system 4 is constructed outside the inclined shaft before the inclined shaft is excavated, which can dynamically and continuously treat the sewage generated during the construction of the inclined shaft, so that the sewage meets the discharge standard when it is discharged into the environment, which can reduce the impact on the environment compared with the existing direct discharge, and make the inclined shaft construction more environmentally friendly. Further, the longitudinal water collecting ditch 31 collects the scattered water, which is drained to the sewage treatment system 4 through the drain pipe.

[0046] The second point is that in the embodiment, before the inclined shaft is excavated, the water diversion hole is formed by advanced drilling in the direction of the inclined shaft excavation at the face of the inclined shaft, and the water diversion pipe is installed in the water diversion hole, so that the underground water in the direction of the face excavation can penetrate into the water diversion pipe through the water diversion hole. The water diversion pipe drains the seepage water to the longitudinal water collecting ditch 31, and the water is discharged to the sewage treatment system 4 through the longitudinal water collecting ditch 31. Compared with the existing technology, the pre-provided water diversion hole can prevent the collapse of the face and the scouring of the bottom of the branch hole caused by excessive underground water at the face during the excavation along the face, and can converge, guide and drain the underground water in front of the face to the target position, effectively reducing the interference of the dispersed underground water on the construction rock surface, and ensuring the normal construction and construction quality.

[0047] Thirdly, in the embodiment, after the water diversion pipe diverts the underground water in advance, the tunnel face can be excavated, the inner wall of the inclined shaft is reinforced, and other construction operations are carried out. With the excavation of the tunnel face, the transverse water interception trench 32 is constructed, which is arranged transversely at the bottom of the inclined shaft and can intercept the underground seepage water at the bottom of the inclined shaft from seeping to the tunnel face due to its own gravity. Specifically, the underground seepage water at a higher position will seep to a lower position under its own gravity, and the tunnel face is at the lowest position of the inclined shaft. In the existing situation, the seepage water seeps to the tunnel face, causing more and more seepage water to gather at the tunnel face, which seriously affects the construction. The transverse water interception trench 32 can directly intercept the seepage path of the underground seepage water. The underground seepage water enters the transverse water interception trench 32 and flows into the longitudinal water interception trench 31 under the diversion effect of the transverse water interception trench 32. The longitudinal water interception trench 31 flows and is discharged, so as to avoid the occurrence of the situations of the bottom plate of the branch hole being washed, the track bottom being subsided, the tunnel face being pumped for a long time, and the excavator and personnel being difficult to walk (it is explained that the underground seepage water will seep to the surface of the lower position when it seeps downward, causing the soil to be soft, so as to cause the situations of the track bottom being subsided and the excavator and personnel being difficult to walk).

[0048] Fourthly, in the embodiment, for the inclined shaft, the inclined shaft is downwardly inclined, specifically, the wellhead position of the inclined shaft is higher than the well bottom position of the inclined shaft. The water in the longitudinal water interception trench 31 will not flow out of the inclined shaft under natural conditions, so the water collection chamber 2 is arranged to collect the water diverted in the longitudinal water interception trench 31, and then the pump station 1 is arranged to pump and discharge the water collected in the water collection chamber 2 to the outside of the inclined shaft and into the sewage treatment system 4. However, if only a single pump station 1 is used for pumping and discharging, the pump station 1 is easy to be overloaded and the water is not discharged in time when the discharge capacity of the seepage water is large under the conditions of high height difference and long length of the inclined shaft. Therefore, in the embodiment, multiple water collection chambers 2 are constructed, and the pump station 1 is arranged in each water collection chamber 2. The water in the water collection chamber 2 close to the well bottom of the inclined shaft is pumped and discharged to the adjacent water collection chamber 2 close to the wellhead of the inclined shaft under the action of the corresponding pump station 1. In succession, the relay rod type water pumping and discharging transmission is realized, which greatly reduces the lift and length of the water required to be pumped and discharged by a single pump station 1, and the continuous work can also ensure continuous drainage and stable drainage operation.

[0049] In the embodiment, in step S2 or / and step S3, the longitudinal water interception trench 31 moves with the tunnel face, and the longitudinal water interception trench 31 is arranged along the length direction of the inclined shaft, which can intercept the underground seepage water at the inner wall of the hole (the inner wall of the inclined shaft) and avoid the underground seepage water at the inner wall of the hole from seeping to the bottom surface of the inclined shaft.

[0050] In the embodiment, in step S5, the construction positions of the sump 2 and / or the pump station 1 are determined according to the slope of the inclined shaft and / or the height difference between the shaft mouth and the shaft bottom of the inclined shaft, and the model of the water pump in the pump station 1, so as to determine the number of the pump stations 1, which is the number of the pump stations 1, to ensure that the water pump can be smoothly pumped and drained. Specifically, the terrain height difference between adjacent sumps 2 cannot be greater than the lift of the water pump in the pump station 1, to ensure that the water pump can pump and drain the water in the sump 2 close to the shaft bottom to the adjacent sump 2 close to the shaft mouth, for example, for the sump 2 spacing design of the “Wanjia inclined shaft 2# inclined shaft branch tunnel”, a water pump with a model of 200 / 150WQ160-45-37 is used, which has a rated lift of 45 m, according to the height difference of 173.228 m between the shaft mouth and the shaft bottom, six sumps 2 are arranged, that is, six pump stations 1 are arranged, and the terrain height difference of each sump 2 is 28.871 m, which meets the requirement that the height difference is lower than the lift of the pump, and the water in the sump 2 can be smoothly pumped and drained to the adjacent sump 2, and finally pumped and drained to the outside of the inclined shaft.

[0051] In the embodiment, further, the pump station 1 has at least one water pump, the model and the number of the water pump are determined according to the slope of the inclined shaft and / or the height difference between the shaft mouth and the shaft bottom of the inclined shaft, and the maximum drainage capacity of the inclined shaft, the maximum drainage capacity of the inclined shaft can be obtained according to the Kosjakoff method and the Goodman empirical formula, and the maximum value is selected as the maximum drainage capacity to ensure that the drainage capacity is sufficient to ensure the safety of the inclined shaft construction; then, the number of the pump is determined according to the maximum drainage capacity, the pumps in the same sump 2 are connected in parallel, and the pump in the pump station 1 can cope with the maximum drainage; for example, for the “Wanjia inclined shaft 2# inclined shaft branch tunnel”, the maximum drainage capacity is 6121 m3 / d, and a water pump with a model of 200 / 150WQ160-45-37 can be selected, which has a rated flow of 160 m3 / h, and after conversion, two water pumps are sufficient to support the maximum drainage capacity of the inclined shaft; however, in actual application, considering the comprehensive factors such as the sand content and mud content of the sewage in the inclined shaft, the water pump loss rate, and the maintenance rate, several more water pumps should be arranged, in the embodiment, for the “Wanjia inclined shaft 2# inclined shaft branch tunnel”, the number of the water pumps is preferably four, three of which are used normally and one is used as a backup.

[0052] As shown in Figures 2-8 A large-slope inclined shaft drainage system of a water tunnel is formed by the construction process, which comprises a plurality of sumps 2 arranged along the length direction of the inclined shaft, each sump 2 is provided with a corresponding pump station 1 to realize multi-stage pump station 1 drainage, a pump water pipe is arranged between adjacent sumps 2, the water inlet end of the pump water pipe is connected with the pump station 1 close to the shaft bottom of the inclined shaft, and the water outlet end of the pump water pipe is located in the sump 2 close to the shaft mouth of the inclined shaft; the sump 2 close to the shaft mouth of the inclined shaft is communicated with a sewage treatment system 4 located outside the inclined shaft; a plurality of sumps 2 are communicated with a water dispersal and collection system 3 in the inclined shaft.

[0053] Specifically, as shown in FIG. 2, Figure 3 The working mode of the drainage system is as follows:

[0054] The water collecting system 3 collects the underground seepage water in the inclined shaft and drains the collected underground seepage water to the water collecting sumps 2, the water collecting sumps 2 temporarily store the underground seepage water, and the water pumps in the air pump station 1 gradually pump the water in the water collecting sumps 2 close to the shaft bottom to the water collecting sumps 2 close to the shaft top, the water collecting sumps 2 closest to the shaft top are pumped to the sewage treatment system 4 through the pump station 1, the sewage treatment system 4 settles the suspended matter and flocculent matter in the water, adjusts the PH value, so that the sewage meets the discharge standard, and then is discharged into the environment.

[0055] In this embodiment, as shown in FIG. 4, Figures 4-5 The sewage treatment system 4 includes a buffer tank 41, a first sedimentation tank 43, a dosing room 44 and a second sedimentation tank 46, the water collecting sumps 2 are connected with the water inlet of the buffer tank 41, the water outlet of the buffer tank 41 is connected with the first sedimentation tank 43 through a water collecting ditch 42, the dosing room 44 is arranged at the first sedimentation tank 43, the first sedimentation tank 43 is connected with the second sedimentation tank 46 through a water channel 45, the water outlet of the second sedimentation tank 46 is connected with a water collecting pool 47, the buffer tank 41 is provided with a water level detector, and the water outlet of the buffer tank 41 is provided with a valve linked with the water level detector. Compared with the prior art, the buffer tank 41 can buffer the flow rate of the sewage during a period of large drainage capacity, so that the sewage enters the first sedimentation tank 43 in a horizontal flow state, thereby avoiding that the large drainage capacity sewage washes the already precipitated impurities in the first sedimentation tank 43 and the second sedimentation tank 46, and avoiding that the turbidity is caused again. The effect is mainly due to the design of the buffer tank 41. Specifically, the buffer tank 41 is vertically installed, the water level detector is preferably a float 411, and the valve linked with the water level detector is preferably a float valve 412, so as to control the water level in the buffer tank 41. When the water level reaches a certain height, the water level detector links the valve to open, and the sewage in the buffer tank 41 slowly overflows and flows to the water collecting ditch 42 in a horizontal flow state. The water collecting structure continuously supplements the water in the buffer tank 41, so that the water in the buffer tank 41 is maintained at a certain height. When the large-capacity sewage enters the buffer tank 41, the entering sewage will consume kinetic energy under the action of the sewage in the buffer tank 41, thereby achieving the purpose of buffering, realizing dynamic precipitation of the suspended matter in the sewage and buffering the high-flow sewage in the initial stage of the inclined shaft drainage, avoiding that the high-flow sewage causes the sewage in the subsequent treatment tank to be chaotic again, maintaining the stability of the sewage treatment, changing the PH value of the sewage, and achieving the purpose of meeting the discharge standard of the sewage.

[0056] It should be noted that, as shown in FIG. 5, Figure 5As shown, the float 411 and the float valve 412 are devices used by those skilled in the art, and their structures will not be described again.

[0057] In the embodiment, the water inlet and the water outlet of the first sedimentation tank 43 are close to the top of the first sedimentation tank 43; the water inlet and the water outlet of the second sedimentation tank 46 are close to the top of the second sedimentation tank 46, sewage overflows from the top of the first sedimentation tank 43 to the second sedimentation tank 46, sewage overflows from the top of the second sedimentation tank 46 to the water collecting tank 47, and whether the index of sewage in the water collecting tank 47 reaches the discharge standard is detected, and the sewage is discharged after reaching the discharge standard.

[0058] Further, the sewage in the state of horizontal flow successively passes through the first sedimentation tank 43 and the second sedimentation tank 46, and the flowing sewage reduces kinetic energy again when entering the first sedimentation tank 43 and the second sedimentation tank 46. The horizontal flow sewage cannot continue to move with the sediment in the sewage, and the sediment settles to the bottom of the tank, achieving the purpose of dynamically precipitating the suspended solids in the sewage, avoiding long-term prohibition, and improving the sewage treatment efficiency.

[0059] Still further, in the embodiment, the dosing chamber 44 device is arranged, the dosing chamber 44 adds medicine such as flocculating agent, coagulant aid and other medicine capable of adjusting PH to the first sedimentation tank 43, so as to achieve the purpose of adjusting the PH value of the sewage and gathering the suspended solids in the sewage, so that the suspended solids can settle.

[0060] In the embodiment, the concentration of the flocculating agent is 12.5%, and the specific configuration is that “2000L water is added with 250kg polyaluminum chloride solid; or 200kg polyaluminum chloride solid is added, and 1600L water is added for conditioning; it is recommended to be mixed and dissolved according to the mass ratio of polyaluminum chloride solid: water = 1:8-1:15; in the embodiment, it is prepared according to 1:8; when preparing, the solid is fully dissolved while stirring and a small amount of medicine is added, and the medicine is not allowed to be put into the dissolving tank at one time for dissolving operation”; the concentration of the flocculating agent is 1.5%, and the specific configuration is that “2000L water is added with 3kg polyacrylamide, or 2.4kg polyacrylamide, and 1600L water is added for conditioning; the operation when preparing is the same as above, and the solid should be fully dissolved; the recommended concentration of polyacrylamide solution is 0.1%-0.3%. In the embodiment, it is prepared according to 0.15%”.

[0061] In the embodiment, compared with the conventional inclined shaft sewage treatment system 4, the large volume of sewage in the inclined shaft is effectively buffered by the buffer tank 41 to reduce the impact force and flow speed, and then naturally overflows to the water collecting ditch 42 through the buffer tank 41, is drained to the first sedimentation tank 43 through the water collecting ditch 42, and the sewage in the water collecting ditch 42 enters the first sedimentation tank 43 to diffuse the liquid flow, further consumes the impact force and kinetic energy of the sewage, so that the sewage is in a horizontal flow state. The dosing interval 44 adds drugs to the sewage in the first sedimentation tank 43 to adjust the PH value, aggregate suspended matter and flocculent matter, and the sewage preliminarily deposits large-particle suspended matter in the first sedimentation tank 43. Then the sewage continues to overflow from the first sedimentation tank 43 to the second sedimentation tank 46, passes through the water channel 45 during the period, and the long-time flow makes the drugs in the sewage fully react. The sewage enters the second sedimentation tank 46 to continue to deposit, so that the sewage treatment is realized.

[0062] In the embodiment, as shown in Figure 4 , the shape of the water collecting ditch 42 is serpentine, that is, "S" shape, so that the sewage continuously rounds the bend in the flow regulation. On the one hand, by increasing the flow distance of the sewage in the water collecting ditch 42, the longer the flow distance, the higher the collision consumption of water molecules in the sewage, the friction consumption between the sewage and the inner wall and bottom of the water collecting ditch 42, so as to further reduce the flow speed. On the other hand, the serpentine water collecting ditch 42 forces the sewage to change the flow direction at the bending part, and the bending part of the water collecting ditch 42 continuously bears the impact of the sewage, so that the impact of the sewage is continuously consumed, so as to further consume the impact force of the sewage.

[0063] As shown in Figures 6-8As shown, in the present embodiment, the water collecting system 3 comprises a plurality of longitudinally spaced transverse water intercepting trenches 32 and longitudinal water intercepting trenches 31 located on one or both sides of the transverse water intercepting trenches 32, the transverse water intercepting trenches 32 are all in communication with the longitudinal water intercepting trenches 31; the longitudinal water intercepting trenches 31 are in communication with the water collecting chamber 2, the longitudinal water intercepting trenches 31 can drain the seepage water to the water collecting chamber 2, and the longitudinal water intercepting trenches 31 are also provided with water seepage holes 322 on the side surface close to the side surface of the inclined shaft, the seepage water in the rock stratum or soil layer of the side surface of the inclined shaft can enter the longitudinal water intercepting trenches 31 through the water seepage holes 322, the longitudinal water intercepting trenches 31 block the seepage water of the side surface of the inclined shaft from entering the bottom surface of the inclined shaft, and drain the collected seepage water (including the seepage water collected from the transverse water intercepting trenches 32) to the water collecting chamber 2; the plurality of transverse water intercepting trenches 32 are spaced along the length direction of the inclined shaft, for the inclined shaft of "Wanjia inclined shaft 2# inclined shaft branch tunnel", the spacing of the transverse water intercepting trenches 32 is 20m, the longitudinal water intercepting trenches 31 are located on one or both sides of the transverse water intercepting trenches 32, the transverse water intercepting trenches 32 are all in communication with the longitudinal water intercepting trenches 31, a plurality of transverse water intercepting trenches 32 and longitudinal water intercepting trenches 31 are provided, the plurality of transverse water intercepting trenches 32 intercept the seepage water in the longitudinal direction of the inclined shaft, improve the ability to block the seepage water flowing to the working face, and drain the seepage water intercepted by the transverse water intercepting trenches 32 to the water collecting chamber 2 through the longitudinal water intercepting trenches 31, so as to ensure the normal drainage treatment in the inclined shaft and avoid water accumulation.

[0064] In the present embodiment, as shown in the figure, Figure 8 The transverse water intercepting trench 32 is a rectangular groove for transverse pre-burial in the bottom surface of the inclined shaft, when the rectangular groove is installed, a transverse pre-burial groove matching the size of the rectangular groove needs to be excavated in the bottom surface of the inclined shaft in advance, and then the rectangular groove is placed in the transverse pre-burial groove; in the present embodiment, the length direction of the inclined shaft is taken as the longitudinal direction, and the direction perpendicular to the inclined shaft is taken as the transverse direction; the rectangular groove is composed of a bottom plate and uphill side steel plates 3211 and downhill side steel plates 3213 located on both sides of the bottom plate, the uphill side steel plates 3211 and the downhill side steel plates 3213 are both transversely arranged, and the outer surfaces thereof are fitted with the inner wall of the transverse pre-burial groove, which can intercept the seepage water on one hand, so as to avoid the seepage water from continuing to seep, and support the inner wall of the transverse pre-burial groove on the other hand, so as to prevent the rock stratum or soil layer at the position where the transverse pre-burial groove is opened from collapsing.

[0065] Specifically, in the present embodiment, a plurality of water seepage holes 322 are opened on the uphill side steel plate 3211, the seepage water seeps into the rectangular groove from the water seepage holes 322 and is collected by the rectangular groove, so as to avoid the weakening of the strength of the rock stratum or soil layer due to the long-term blockage of the seepage water in the rock stratum or soil layer; the downhill side steel plate 3213 blocks the seepage water from continuing to seep, so that the transverse water intercepting trench 32 can intercept and collect the water seeping towards the working face, and reduce the erosion of the water to the working face and the branch tunnel.

[0066] It should be noted that in the embodiment, the transportation track is laid on the rectangular groove when laid, and the rectangular groove can support the transportation track, thereby further reducing the possibility of settlement of the transportation track.

[0067] It should be noted that for the inclined shaft, the installation position of the uphill side steel plate 3211 is higher than that of the downhill side steel plate 3213. In the inclined shaft, the infiltrating water infiltrates from the high position to the low position, and the installation position of the uphill side steel plate 3211 facilitates the infiltration of the water into the rectangular groove. Specifically, the installation position of the uphill side steel plate 3211 is closer to the wellhead of the inclined shaft, and the installation position of the downhill side steel plate 3213 is closer to the well bottom of the inclined shaft.

[0068] In the embodiment, the space position of the surface of the bottom plate close to the longitudinal water intercepting ditch 31 is lower than that of the surface away from the longitudinal water intercepting ditch 31, so that the infiltrating water in the rectangular groove can flow to the longitudinal water intercepting ditch 31 under the action of its own gravitational potential energy.

[0069] Specifically, as shown in FIG. 4, one arrangement mode of the transverse water intercepting ditch 32 and the longitudinal water intercepting ditch 31 is as follows: Figure 6

[0070] If both ends of the transverse water intercepting ditch 32 have the longitudinal water intercepting ditch 31, the middle part of the bottom plate is higher in the space position than both ends of the bottom plate.

[0071] Specifically, as shown in FIG. 5, another arrangement mode of the transverse water intercepting ditch 32 and the longitudinal water intercepting ditch 31 is as follows: Figure 7

[0072] If only one end of the transverse water intercepting ditch 32 has the longitudinal water intercepting ditch 31, the end of the bottom plate close to the longitudinal water intercepting ditch 31 is lower than the end away from the longitudinal water intercepting ditch 31. The other end of the transverse water intercepting ditch 32 is provided with an end face sealing plate 3212, and a plurality of water infiltration holes 322 are formed in the end face sealing plate 3212. The infiltrating water at the end face of the rectangular groove enters the rectangular groove through the water infiltration holes 322 of the end face sealing plate 3212, so as to avoid the water in the rectangular groove from infiltrating to the inner wall of the inclined shaft from this position, thereby affecting the construction quality of the inclined shaft.

[0073] In the embodiment, the cable steel pipe 323 is fixed on the downhill side steel plate 3213, and the cable steel pipe 323 is transversely arranged. The cable steel pipe 323 is used for passing through the cable, so as to protect the cable. Further, the two ends of the cable steel pipe 323 can be filled and sealed by using coarse particle shotcreting material, so as to avoid the infiltrating water from entering the cable steel pipe 323 and corroding and damaging the cable. The cable steel pipe 323 is as close as possible to the top of the rectangular groove, so as to avoid the cable steel pipe 323 from being submerged by the infiltrating water in the rectangular groove.

[0074] ​​The application is not restricted to the foregoing specific embodiments. The application extends to any novel one, or any novel combination, of the features disclosed in this specification, and to any novel method or process disclosed in this specification or any novel combination thereof.

Claims

1. A construction process of a large slope inclined shaft drainage system of a hydraulic tunnel, characterized in that: The method comprises the following steps: S1: constructing a sewage treatment system (4) outside the inclined shaft; S2: excavating a longitudinal water intercepting trench (31) at the working face, laying a drainage pipe between the longitudinal water intercepting trench (31) and the sewage treatment system (4), and draining water in the longitudinal water intercepting trench (31) to the sewage treatment system (4) through the drainage pipe; S3: forming a water diversion hole by advanced drilling at the working face, installing a water diversion pipe in the water diversion hole, and draining water to the longitudinal water intercepting trench (31) through the water diversion pipe while excavating and pumping water in the longitudinal water intercepting trench (31); S4: laying a transverse water intercepting trench (32) at intervals during the excavation of the inclined shaft, and collecting water to the longitudinal water intercepting trench (31) through the transverse water intercepting trench (32); S5: after the working face reaches a set depth, excavating a water collecting chamber (2), connecting the water collecting chamber (2) with the longitudinal water intercepting trench (31), and constructing a pump station (1) in the water collecting chamber (2); S6: repeating steps S3-S5, constructing a water pumping pipe between adjacent water collecting chambers (2) to form a multi-stage pump station (1) for relay water pumping until the inclined shaft is constructed to a target position; The transverse water intercepting trench (32) is a rectangular groove for transverse pre-burial in the bottom surface of the inclined shaft, the rectangular groove is composed of a bottom plate and upper slope side steel plates (3211) and lower slope side steel plates (3213) located on both sides of the bottom plate, and a plurality of water seepage holes (322) are formed in the upper slope side steel plates (3211); The sewage treatment system (4) comprises a buffer tank (41), a first sedimentation tank (43), a dosing chamber (44), and a second sedimentation tank (46), the water collecting chamber (2) is connected with a water inlet of the buffer tank (41), a water outlet of the buffer tank (41) is connected with the first sedimentation tank (43) through a water collecting ditch (42), the dosing chamber (44) is arranged at the first sedimentation tank (43), the first sedimentation tank (43) is connected with the second sedimentation tank (46) through a water channel (45), and a water outlet of the second sedimentation tank (46) is connected with a water collecting tank (47); the buffer tank (41) is provided with a water level detector, and the water outlet of the buffer tank (41) is provided with a valve linked with the water level detector; when the water level in the buffer tank (41) reaches a certain height and is higher than the valve position at the water outlet, the water level detector links the valve to open, and the sewage in the buffer tank (41) is slowly overflowed and flows to the water collecting ditch (42) in a horizontal flow state.

2. The construction process of the large-inclination shaft drainage system of a water tunnel according to claim 1, characterized in that: In step S2 or / and step S3, the longitudinal water intercepting trench (31) moves with the working face.

3. The construction process of the large-inclination shaft drainage system of a water tunnel according to claim 1, characterized in that: In step S5, the construction position of the water collecting chamber (2) or / and the pump station (1) is determined according to the slope of the inclined shaft or / and the height difference between the shaft mouth and the shaft bottom of the inclined shaft, and the model of the water pump in the pump station (1), so as to determine the number of stages of the pump station (1).

4. The construction process of the large-inclination shaft drainage system of a water tunnel according to claim 3, characterized in that: The pump station (1) is provided with at least one water pump, and the model of the water pump is determined according to the slope of the inclined shaft or / and the height difference between the shaft mouth and the shaft bottom of the inclined shaft, and the maximum water pumping capacity of the inclined shaft.

5. A water tunnel large slope inclined shaft drainage system formed by the construction process of any one of claims 1-4, characterized in that: The invention discloses a sewage treatment system for a slant well, which comprises a plurality of water collecting sumps (2) arranged along the length direction of the slant well, a corresponding pump station (1) is arranged in each of the water collecting sumps (2), a pump water pipe is arranged between adjacent water collecting sumps (2), the water inlet end of the pump water pipe is connected with the pump station (1) near the bottom of the slant well, and the water outlet end of the pump water pipe is located in the water collecting sump (2) near the top of the slant well; the water collecting sump (2) near the top of the slant well is communicated with a sewage treatment system (4) located outside the slant well; and the plurality of water collecting sumps (2) are communicated with a water dispersion collecting system (3) in the slant well.

6. The steep incline shaft drainage system for a water tunnel according to claim 5, characterized in that: The shape of the water collecting ditch (42) is serpentine.

7. The steep incline shaft drainage system for a tunnel according to claim 5, wherein: The water dispersion collecting system (3) comprises a plurality of transverse water intercepting ditches (32) arranged in longitudinal direction at intervals and longitudinal water intercepting ditches (31) located on both sides or one side of the transverse water intercepting ditches (32), the transverse water intercepting ditches (32) are communicated with the longitudinal water intercepting ditches (31), and the longitudinal water intercepting ditches (31) are communicated with the water collecting sumps (2).

8. The steep incline shaft drainage system for a tunnel according to claim 5, wherein: The lower slope side steel plate (3213) is fixed with a cable steel pipe (323).

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