CN216041314U

CN216041314U - Underbending well drainage corridor arrangement structure combined with long exploratory hole design

Info

Publication number: CN216041314U
Application number: CN202121750782.2U
Authority: CN
Inventors: 裘杭杰; 李煜; 王维熙; 李高会; 李飞; 余雪松
Original assignee: PowerChina Huadong Engineering Corp Ltd
Current assignee: PowerChina Huadong Engineering Corp Ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-03-15
Anticipated expiration: 2031-07-29

Abstract

The utility model provides a drainage gallery arrangement structure of a lower inclined shaft, which is designed by combining a long exploratory hole, wherein a drainage gallery is arranged near the lower inclined shaft and is provided with a drainage hole; the arrangement structure is further provided with a tail adjusting ventilation hole connecting hole, the upstream end of the tail adjusting ventilation hole connecting hole is connected with the geological long exploratory hole at the top of the workshop on the upstream side of the tail water pressure adjusting upper chamber, the downstream end of the tail adjusting ventilation hole is connected with the tail adjusting ventilation hole, and rock gap water is discharged out of the hole along a slope. The utility model has simple structure, can reduce the external water pressure of the steel lining in one step and avoid the instability of the steel lining of the inclined shaft under water diversion against external pressure.

Description

Underbending well drainage corridor arrangement structure combined with long exploratory hole design

Technical Field

The utility model relates to a lower inclined shaft drainage corridor arrangement structure combined with a long exploratory hole design, which is mainly suitable for longer hydraulic and hydroelectric engineering of a lower inclined shaft of a pumped storage power station.

Background

For a high-water-head pumping and storage power station, because the water head is higher and the burial depth is larger, the internal and external water pressure borne by a lower inclined shaft and a lower open cut of a water diversion system is larger, and if external pressure resistance instability occurs once, the unstable part of a light person needs to be treated, so that the operation requirement of the pumping and storage power station is influenced; the safety of the power station may be affected. Therefore, when the water head of the water diversion system is high, a two-stage inclined shaft or vertical shaft arrangement mode is generally adopted, in order to effectively reduce the water pressure outside the steel lining of the power station, drainage galleries are generally respectively arranged at the positions of a horizontal tunnel and a lower horizontal tunnel in the water diversion, and the drainage galleries are arranged in combination with a construction branch tunnel, so that accumulated water is conveniently drained to the outside of the tunnel to be uniformly treated.

When the arrangement of the underwater inclined shaft of part of the pumping and storage power station is long, a drainage gallery is additionally arranged at the middle elevation of the underground inclined shaft, the drainage gallery which is additionally arranged is long, and the engineering investment is large. Based on the current situation, if the drainage gallery arrangement form which is clear in arrangement, short in line and convenient to construct is provided on the basis of a conventional drainage system, the external water pressure of the steel pipe of the water diversion system is further ensured to be in a low external water pressure state.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is: aiming at the problems, the utility model provides a down-dip well drainage corridor arrangement structure who combines the design of long exploratory hole, simple structure can be by one step low steel lining external water pressure, avoids leading water down-dip well steel lining external pressure unstability that resists. The technical scheme adopted by the utility model is as follows:

a lower inclined shaft drainage gallery arrangement structure designed by combining a long exploratory hole is characterized in that a drainage gallery is arranged near the lower inclined shaft, the drainage gallery is provided with a drainage hole, a drainage system is formed by the drainage gallery, the starting point corresponds to the middle part of the lower inclined shaft, the terminal point is connected with a geological long exploratory hole at the top of a factory building, and the starting point is higher than the terminal point; the arrangement structure is further provided with a tail adjusting ventilation hole connecting hole, the upstream end of the tail adjusting ventilation hole connecting hole is connected with the geological long exploratory hole at the top of the workshop on the upstream side of the tail water pressure adjusting upper chamber, the downstream end of the tail adjusting ventilation hole is connected with the tail adjusting ventilation hole, and rock gap water is discharged out of the hole along a slope.

On the basis of the technical scheme, the utility model can also adopt the following further technical schemes or combine the further technical schemes for use:

the drainage gallery is located above the lower inclined shaft.

The drain holes comprise a downward extending drain hole and an obliquely upward extending drain hole, wherein the bottom of the downward extending drain hole is deeper than the inclined shaft.

The excavation terminal surface of drainage corridor is city door opening type, and the wash port of downwardly extending sets up in the bottom plate of drainage corridor, and the wash port that extends in the slant sets up in the hunch shoulder of drainage corridor.

The drainage system comprises a plurality of parallel drainage galleries parallel to the downdip shaft, an upstream communication drainage gallery and a downstream communication drainage gallery, wherein the upstream drainage gallery is used for communicating the parallel drainage galleries at the upstream, the downstream drainage gallery is used for communicating the parallel drainage galleries at the downstream, and the downstream drainage gallery is connected with the geological long exploratory hole at the top of the factory building.

The tail adjusting ventilation hole combined with the geological long exploration hole at the top of the workshop is expanded and dug, and the hole diameter of the tail adjusting ventilation hole is matched with the size required by transportation of tail water pressure adjusting upper room equipment and is communicated with the geological long exploration hole at the top of the workshop at the downstream side of the tail water pressure adjusting upper room.

The utility model has the beneficial effects that:

1. on the basis of the original outer drainage system, particularly for the engineering with larger burial depth and longer inclined shaft, the outer water pressure of the steel pipe of the diversion inclined shaft is further reduced, and the safe and stable operation of the engineering is guaranteed;

2. the drainage gallery of the lower inclined shaft is combined with the long exploratory hole, and the length of the drainage gallery is shortened, so that the construction period is shortened, and the engineering investment is reduced.

3. The long exploration tunnel is connected with the tail adjusting ventilation tunnel through the tail adjusting ventilation tunnel communication tunnel, rock gap water is discharged out of the tunnel along the slope, and compared with the traditional adverse slope type water discharge, the long exploration tunnel saves engineering investment while being convenient to construct.

Drawings

Fig. 1 is a plan view of the drainage gallery of the present invention.

Fig. 2 is a cross-sectional view of the drain gallery of the present invention, taken along line a-a of fig. 1 and 3.

Fig. 3 is a longitudinal sectional view of the drain gallery of the present invention, taken along section B-B of fig. 1.

Detailed Description

The utility model provides a long exploratory hole combined designed underground inclined well drainage gallery arrangement structure, which comprises a drainage system consisting of drainage galleries, wherein the starting point of the drainage system corresponds to the middle part of an underground inclined well, the terminal point is connected with a geological long exploratory hole 101 at the top of a factory building, and the elevation of the starting point is higher than that of the terminal point. The arrangement structure is further provided with a tail adjusting vent hole connecting hole 102, the upstream end of the tail adjusting vent hole connecting hole 102 is connected with a geological long exploration hole 101 in the top of a workshop on the upstream side of the tail water pressure adjusting upper chamber 200, the downstream end of the tail adjusting vent hole is connected with a tail adjusting vent hole 103, and rock gap water is discharged out of the hole along a slope, so that the aim of reducing the water pressure outside a steel pipe of the down inclined shaft is fulfilled.

As shown in FIGS. 1-3, in the present embodiment, a water delivery system of a power station is taken as an example, which is provided with 3 water diversion underground

inclined shafts

1, 2, 3, six drainage galleries B-1, B-2, B-3, B-4, B-5, B-6 are arranged near the underground

inclined shafts

1, 2, 3, and in order to ensure smooth drainage, the excavation slope ratio of the bottom plate of the drainage gallery is 1%, and the excavation section form is a door opening form with a width of 2.5m and a height of 3m, wherein the drainage galleries B-1, B-2, B-3, B-4 and the underground

inclined shafts

1, 2, 3 are arranged in parallel at intervals, the arrangement positions of the parallel drainage galleries B-1, B-2, B-3, B-4 are higher than the parallel underground inclined shafts, and the drainage gallery B-5 is arranged upstream to drain the drainage galleries B-1, B-2, B-4, B-3 and B-4 are communicated, and the drainage gallery B-6 communicates the drainage galleries B-1, B-2, B-3 and B-4 at the downstream.

Deep drainage holes

11 and 12 are respectively arranged at the positions of the arch shoulders and the bottom plate of the parallel drainage galleries B-1, B-2, B-3 and B-4, and in the embodiment, the distance between every two adjacent drainage holes is 6m and the length is 30-50m in the length direction of the drainage galleries. The drain hole 11 communicated with the arch shoulder extends obliquely upwards, the drain hole 11 in the embodiment has the inclination of 30 degrees, the length of 30-30m and the aperture of 65mm, the drain hole 12 communicated with the bottom plate extends downwards, the bottom of the drain hole is deeper than the drain gallery, the drain hole 12 in the embodiment has the length of 50m and the aperture of 65 mm. The surrounding rock seepage water near the lower inclined shaft flows into the drainage galleries B-1, B-2, B-3 and B-4 through the

drainage holes

11 and 12 and finally converges into the downstream communication drainage gallery B-6, the downstream communication drainage gallery B-6 is connected with the geological long exploratory hole 101 at the top of the factory building and is discharged along the slope through the geological long exploratory hole 101 at the top of the factory building, the tail regulating vent hole connecting hole 102 and the tail regulating vent hole 103. Wherein, for the transportation of making things convenient for tail water surge-chamber equipment, the tail of arranging with factory building top geology long exploratory hole 101 combination and arranging ventilates hole 104 and needs to expand to dig the processing, and the hole diameter of tail is transferred ventilates hole 104 and is satisfied tail water surge-chamber equipment transportation required size and match and switch-on with factory building top geology long exploratory hole 101 of tail water pressure regulating upper chamber 200 downstream side, and reference numeral 200 is tail water pressure regulating upper chamber.

The utility model is not limited to the examples, and any equivalent changes to the technical solution of the utility model by a person skilled in the art after reading the description of the utility model are covered by the claims of the utility model.

Claims

1. A lower inclined shaft drainage gallery arrangement structure designed by combining a long exploratory hole is characterized in that a drainage gallery is arranged near the lower inclined shaft, the drainage gallery is provided with a drainage hole, a drainage system is formed by the drainage gallery, the starting point corresponds to the middle part of the lower inclined shaft, the terminal point is connected with a geological long exploratory hole at the top of a factory building, and the starting point is higher than the terminal point; the arrangement structure is further provided with a tail adjusting ventilation hole connecting hole, the upstream end of the tail adjusting ventilation hole connecting hole is connected with the geological long exploratory hole at the top of the workshop on the upstream side of the tail water pressure adjusting upper chamber, the downstream end of the tail adjusting ventilation hole is connected with the tail adjusting ventilation hole, and rock gap water is discharged out of the hole along a slope.

2. A slant well drainage corridor arrangement in combination with a longwall design according to claim 1, wherein said drainage corridor is located above the slant well.

3. The underlisting well drainage corridor arrangement in combination with a longhole design according to claim 1, wherein the drainage holes comprise a downwardly extending drainage hole and an obliquely upwardly extending drainage hole, wherein the bottom of the downwardly extending drainage hole is deeper than the underlisting well.

4. The underground slant well drainage gallery arrangement structure combined with the longwall tunnel design according to claim 1, wherein the excavation end face of the drainage gallery is of a tunnel type, the downward extending drainage holes are provided on the bottom plate of the drainage gallery, and the oblique upward extending drainage holes are provided on the arch shoulder of the drainage gallery.

5. The underground shaft drainage gallery arrangement structure designed by combining the longwall tunnel of claim 1, wherein the drainage system includes a plurality of parallel drainage galleries parallel to the underground shaft, and an upstream communication drainage gallery and a downstream communication drainage gallery, the upstream drainage gallery connects the parallel drainage galleries at the upstream, the downstream drainage gallery connects the parallel drainage galleries at the downstream, and the downstream drainage gallery connects the geological tunnel at the top of the factory building.

6. The underground shaft drainage corridor arrangement structure designed by combining the long exploratory hole as claimed in claim 1, wherein the tail adjusting vent hole arranged by combining with the geological long exploratory hole at the top of the factory building is enlarged and dug, and the hole diameter of the tail adjusting vent hole is matched with the size required by transportation of tail water pressure adjusting upper chamber equipment and communicated with the geological long exploratory hole at the top of the factory building at the downstream side of the tail water pressure adjusting upper chamber.