CN218324952U

CN218324952U - Water collecting device for draining water in grotto excavation period

Info

Publication number: CN218324952U
Application number: CN202121854135.6U
Authority: CN
Inventors: 石继忠; 柏浩强; 周廷江; 杨世康; 钱洋斌
Original assignee: Zhejiang East China Engineering Consulting Co Ltd
Current assignee: Zhejiang East China Engineering Consulting Co Ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2023-01-17
Anticipated expiration: 2031-08-09

Abstract

The utility model relates to a water-collection device that grotto excavation period drainage was used, join in marriage the hole slag blanket including the level that is used for burying the sump pit, bury underground in the lower extreme open-ended header tank that the hole slag blanket was joined in marriage to the level, install the suction pump in the header tank, along the drain pipe that grotto length direction set up, be used for connecting the water pipe of suction pump and drain pipe, the delivery port has been seted up to header tank one side lateral wall, the header tank is worn out through the delivery port to the water pipe, the header tank is used for supplying the header tank rivers infiltration to enter into in the header tank. In the process, repeated excavation is avoided to a certain extent to set up the sump pit, the overall stability of the cavern is improved, and potential safety hazards are reduced. The backfill work in the later period is reduced, and the post-processing cost is saved. Simultaneously because the graded hole slag layer has certain filter effect, so do not need frequent desilting to the header tank to handle, sustainability is strong.

Description

Water collecting device for draining water in grotto excavation period

Technical Field

The application relates to the field of construction drainage, in particular to a water collecting device for drainage in a grotto excavation period.

Background

The construction of hydropower station engineering construction nodes, particularly pumped storage power stations, relates to excavation construction of a series of underground caverns and cavern groups, the underground caverns are mostly distributed in water-rich areas, underground water is abundant, so that a large amount of water seepage is inevitably generated in the excavation process of the caverns, and in the existing blasting excavation technology, a part of construction waste water is generated when drilling equipment and the like are used for construction, and water collection, pumping and drainage treatment are required.

At present, the common measures of cavern drainage are generally to arrange water collecting wells at the side wall of the cavern in stages, and then adopt a water pump to pump and drain, but the facility often fails along with the footage excavation of the cavern, needs to be built many times, and sustainability is poor.

SUMMERY OF THE UTILITY MODEL

In order to improve the sustainability of the process,

the application provides a water-collecting device that grotto excavation period drainage was used adopts following technical scheme:

the utility model provides a water-collecting device that grotto excavation phase drainage was used, includes the hole slag blanket is joined in marriage to the level that is used for the landfill sump pit, buries underground in the lower extreme open-ended header tank of hole slag blanket, install the suction pump in the header tank, along the drain pipe that grotto length direction set up, be used for connecting the water pipe of suction pump and drain pipe, the delivery port has been seted up to header tank one side lateral wall, the water pipe wears out the header tank through the delivery port, the header tank is used for supplying the header tank rivers infiltration to enter into in the header tank.

By adopting the technical scheme, the proper position capable of burying the water collecting tank is selected, a large pit section can be locally overexcited by the bottom plate, a downstream section of a slope surface close to a tunnel face can be selected, and a certain technical overexcavation measure can be adopted to build the water collecting pit on the bottom plate under the condition of no overexcavation. And burying the water collecting tank in the water collecting pit, and then burying the graded hole slag in the water collecting pit to form a graded hole slag layer. And the water suction pump works, accumulated water to be drained enters the water collecting tank after being filtered by the graded hole slag layer, and then is drained into the drainage pipe along the water pipe to finish drainage. The water collecting tank can be continuously buried forwards along with the footage of the cavern, and the sustainability is good. The original water collecting pit is filled with the hole slag in the excavation period, and when pavement construction is carried out in the later period, the water collecting pit can be filled with a cushion material or a water-stable layer material without special refilling.

In the process, repeated excavation is avoided to a certain extent to set up the sump pit, the overall stability of the cavern is improved, and potential safety hazards are reduced. The backfill work in the later period is reduced, and the post-processing cost is saved. Simultaneously because the graded hole slag layer has certain filter effect, so do not need frequent desilting to the header tank to handle, sustainability is strong.

Optionally, the water collecting tank comprises four side plates and a top plate, and a plurality of grid grooves are formed in the top plate.

Through adopting above-mentioned technical scheme, can make ponding flow in the header tank, still can avoid the hole sediment to enter into in the header tank as far as possible simultaneously.

Optionally, a plurality of holes are formed in the side plates on the upstream face, and a plurality of holes are formed in two adjacent side plates of the side plates on the upstream face.

By adopting the technical scheme, the water collecting tank can be ensured to be stable as much as possible, and meanwhile, the water collecting tank can be used for water inflow from multiple surfaces, so that the drainage efficiency is improved.

Optionally, the area of the side plate with the hole forms a hole area, and the hole area is located at the lower half part of the side plate.

Through adopting above-mentioned technical scheme, make the header tank can keep certain stability at the in-process of intaking to make whole water-collecting device can more stable operation.

Optionally, the header tank overcoat is equipped with braced frame, braced frame fixed connection is in the header tank outer wall.

Through adopting above-mentioned technical scheme, braced frame has certain intensity, reduces the probability that the header tank receives extrusion deformation.

Optionally, the support frame includes five backup pads, and four curb plates of five backup pads one-to-one respectively and a roof, the backup pad includes outline and internal stay structure, internal stay structure is netted and fixed connection in outline.

Through adopting above-mentioned technical scheme to make braced frame have better structural strength.

Optionally, the outer walls of the two opposite supporting plates are provided with lifting lugs, and the supporting plates are not arranged on the supporting plate facing the water.

Through adopting above-mentioned technical scheme, the accessible lug comes to header tank and braced frame application of force, makes things convenient for lifting of header tank to shift.

Optionally, the water outlet is located on a side plate on one side of the side plate facing the water surface.

By adopting the technical scheme, the contact area of the water collecting tank and water in the water inlet process is as large as possible, and accumulated water can be collected more stably by the water collecting tank.

In summary, the present application includes at least one of the following beneficial technical effects:

1. secondary excavation of local tunnel walls is reduced, the overall stability of the tunnel is enhanced, and potential safety hazards are reduced;

2. the water collecting tanks can be arranged in a moving way at any time, and the continuity is good;

3. safety protection is not required to be carried out independently, and process maintenance is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the embodiment.

Fig. 2 is a schematic structural view after the embodiment is installed.

Fig. 3 is a schematic structural view of the water collecting tank seen from the upstream side in the embodiment.

Fig. 4 is a schematic structural view of the water collecting tank seen from the back surface in the embodiment.

Fig. 5 is a schematic structural view of the support frame in the embodiment.

Description of reference numerals: 1. a water collection tank; 2. a water pump; 3. a drain pipe; 4. a water pipe; 5. a sump; 6. a side plate; 7. a top plate; 8. a grid groove; 9. a pore; 10. a support frame; 11. a support plate; 12. an outer frame; 13. an inner support structure; 14. lifting lugs; 15. grading a hole slag layer; 16. a water outlet; 17. and (4) inserting the socket.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses water collecting device that grotto excavation period drainage was used. Referring to fig. 1 and 2, a water collecting apparatus for draining water during a grotto excavation period includes a water collecting tank 1, a suction pump 2, a drain pipe 3, and a water pipe 4. The lower end of the water collecting tank 1 is provided with an opening, and the water suction pump 2 is positioned in the water collecting tank 1. The drain pipe 3 is arranged along the length direction of the chamber. Water pipe 4 is the flexible setting, and water pipe 4 connects suction pump 2 and drain pipe 3.

Water is pumped through the water pump 2, accumulated water is led into the water collecting tank 1 and then is led into the water discharging pipe 3 through the water pipe 4, and accumulated water discharging is completed. In order to facilitate the connection between the water pipe 4 and the water discharge pipe 3, the upper end surface of the water discharge pipe 3 is provided with a socket 17 for inserting the water supply pipe 4, and the sockets are arranged at intervals along the length direction of the water discharge pipe 3.

Specifically, referring to fig. 3 and 4, the water collecting tank 1 includes four side plates 6 and a top plate 7, and the four side plates 6 and the top plate 7 are welded and fixed to each other. The top plate 7 is provided with a plurality of grid grooves 8, and the top plate 7 can be composed of steel grates. The side plates 6 at the back water plate are made of closed steel plates. The other three side plates 6 are provided with a plurality of holes 9. The area of the side plate 6 provided with the holes 9 forms a hole area, and the hole area is positioned at the lower half part of the side plate 6 to form a semi-closed semi-hole 9 structure. The side plate 6 with the holes 9 can be made of steel plates or steel grids with the holes 9. A water outlet 16 is arranged on the side plate 6 at the side facing the water surface, and the water outlet 16 is used for the water supply pipe 4 to penetrate out of the water collecting tank 1.

Referring to fig. 5, in order to reduce the probability of pressure loss of the water collecting tank 1, a support frame 10 is sleeved outside the water collecting tank 1, and the support frame 10 is fixedly welded to the outer wall of the water collecting tank 1. Referring to fig. 3 and 5, the support frame 10 includes five support plates 11, and the five support plates 11 correspond to the four side plates 6 and the top plate 7, respectively. Referring to fig. 5, the supporting plate 11 includes an outer frame 12 and an inner supporting structure 13, and the inner supporting structure 13 is net-shaped and is fixedly connected in the outer frame 12. The outer frame 12 and the inner supporting structure 13 can be welded by angle steel or steel bars.

Referring to fig. 5, in order to facilitate the movement of the water collecting tank 1, the outer walls of two opposite supporting plates 11 are provided with lifting lugs 14, and the supporting plates 11 are not disposed on the supporting plates 11 facing the water.

The water collecting principle of the water collecting device for draining water in the grotto excavation period is as follows:

1. selecting a proper position where the water collecting tank 1 can be buried, wherein the proper position can be a large pit section of local base plate overexcavation, a downstream section of a slope surface close to a tunnel face can be selected, and a water collecting pit 5 can be built on the base plate by adopting a certain technical overexcavation measure under the condition of no overexcavation;

2. the water collecting tank 1 provided with the water suction pump 2 is buried in the water collecting pit 5, a water outlet pump pipe and a power line are connected and led to the outer side through a water outlet 16, a drain pipe 3 can be laid along a side wall, the water outlet pump pipe and the power line are connected and led to the outer side through the water outlet 16, and the top of the water collecting tank 1 is covered by a steel grate with certain strength to prevent the hole slag from flowing into the water collecting tank 1;

3. hole slag with certain thickness is paved on the top of the water collecting tank 1 and the upstream surface, and the hole slag should have certain gradation when being paved to form a gradation hole slag layer 15, so that water seepage and fine particle hole slag separation are facilitated, and sewage and wastewater can be simply filtered;

4. pumping water through a water pump 2, filtering accumulated water through a graded hole slag layer 15, then entering a water collecting tank 1, and then leading the filtered accumulated water into a water drainage pipe 3 through a water pipe 4 to finish the drainage of the accumulated water;

5. along with the cavern footage can be continuous to bury water collector underground forward, leave over the sump pit 5 originally and adopt the hole sediment to fill in the excavation period, when the later stage carries out road surface construction, can adopt bedding material or water steady layer material to backfill, need not to carry out the backfill of special item.

6. The water collecting mode collects water by using a seepage principle, effectively utilizes the characteristics and construction conditions of the excavation period of the cavern, avoids secondary excavation of a local cavern wall and enhances the overall stability of the cavern; meanwhile, the device has simple structure, convenient operation and quick arrangement, can adapt to various cavern environments, and the volume of the water collecting tank 1 can be flexibly adjusted; the hole slag materials are adopted for seepage and water collection, so that the pollution to the water collecting tank 1 can be reduced, frequent desilting treatment on the water collecting tank 1 is not needed, and the sustainability is strong; the water collecting tank 1 can be arranged in a moving mode at any time, the continuity is good, meanwhile, the periphery is completely paved by stone slag, independent safety protection is not needed, and the process maintenance is reduced; the sump pit 5 is backfilled when the road is built after the abandonment of the later period, so that the treatment cost is reduced, and the device has stronger applicability and operability in effective utilization.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a water-collecting device that grotto excavation period drainage was used which characterized in that: hole sediment layer (15) are joined in marriage to the level including the level that is used for landfill sump (5), bury underground lower extreme open-ended header tank (1) in hole sediment layer (15) are joined in marriage to the level, install suction pump (2) in header tank (1), drain pipe (3) that set up along hole length direction, be used for connecting water pipe (4) of suction pump (2) and drain pipe (3), delivery port (16) have been seted up to header tank (1) one side lateral wall, header tank (1) is worn out through delivery port (16) in water pipe (4), header tank (1) is used for supplying header tank (1) outer rivers infiltration to enter into header tank (1).

2. The water collecting device for draining water in the excavation period of the grotto as claimed in claim 1, wherein: the water collecting tank (1) comprises four side plates (6) and a top plate (7), and a plurality of grid grooves (8) are formed in the top plate (7).

3. The water collecting device for draining water in the excavation period of the grotto as claimed in claim 2, wherein: a plurality of holes (9) are formed in the side plates (6) on the upstream face, and a plurality of holes (9) are formed in two adjacent side plates (6) of the side plates (6) on the upstream face.

4. The water collecting device for draining water in the excavation period of the grotto as claimed in claim 3, wherein: the area of the side plate (6) provided with the pore (9) forms a pore area, and the pore area is positioned at the lower half part of the side plate (6).

5. The water collecting device for draining water in the excavation period of the grotto as claimed in claim 2, wherein: the water collecting tank (1) is sleeved with a supporting frame (10), and the supporting frame (10) is fixedly connected to the outer wall of the water collecting tank (1).

6. The water collecting device for draining water in the excavation period of the grotto according to claim 5, wherein: the supporting frame (10) comprises five supporting plates (11), the five supporting plates (11) correspond to four side plates (6) and a top plate (7) respectively in a one-to-one mode, the supporting plates (11) comprise outer frames (12) and inner supporting structures (13), and the inner supporting structures (13) are meshed and are fixedly connected in the outer frames (12).

7. The water collecting device for draining water in the excavation period of the grotto as claimed in claim 6, wherein: lifting lugs (14) are arranged on the outer walls of the two opposite supporting plates (11), and the supporting plates (11) are not arranged on the supporting plates (11) facing the water.

8. The water collecting device for draining water in the excavation period of the grotto according to claim 4, wherein: the water outlet (16) is positioned on the side plate (6) on one side of the side plate (6) facing the water surface.