CN212335950U

CN212335950U - Novel drainage gallery tip arrangement structure

Info

Publication number: CN212335950U
Application number: CN202020764322.4U
Authority: CN
Inventors: 姚右文; 陈晓江; 崔伟杰
Original assignee: PowerChina Huadong Engineering Corp Ltd
Current assignee: PowerChina Huadong Engineering Corp Ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2021-01-12
Anticipated expiration: 2030-05-11

Abstract

The utility model relates to a novel drainage corridor tip arrangement structure. The utility model aims at providing a simple structure, construction convenience, the lower novel drainage corridor tip arrangement structure of cost. The technical scheme of the utility model is that: the utility model provides a novel drainage corridor tip arrangement structure, has drainage corridor, its characterized in that: the end part of the drainage gallery is provided with a plurality of deep drainage holes in the mountain in front of the port of the drainage gallery, one end of each deep drainage hole is communicated with the drainage gallery, and the other end of each deep drainage hole extends into the mountain to enlarge the drainage coverage area of the drainage gallery. The utility model is suitable for a hydraulic and hydroelectric engineering.

Description

Novel drainage gallery tip arrangement structure

Technical Field

The utility model relates to a novel drainage corridor tip arrangement structure. Is suitable for water conservancy and hydropower engineering.

Background

Drainage galleries are arranged in diversion tunnels of many hydraulic and hydroelectric projects, particularly in high-pressure tunnels, the existence of the drainage galleries can greatly reduce the pressure of underground water, and the diversion tunnels are protected from being damaged due to external pressure resistance and instability. The drainage gallery provides a passage for draining underground water, and great convenience is brought to engineering design. As shown in fig. 1, in some hydroelectric power stations, the diversion tunnels are usually long, but the diameter of the drainage corridor is relatively small, so that it is obviously very troublesome to excavate small holes which are deep and long for construction.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: aiming at the existing problems, the novel drainage gallery end part arrangement structure is simple in structure, convenient to construct and low in cost.

The utility model adopts the technical proposal that: the utility model provides a novel drainage corridor tip arrangement structure, has drainage corridor, its characterized in that: the end part of the drainage gallery is provided with a plurality of deep drainage holes in the mountain in front of the port of the drainage gallery, one end of each deep drainage hole is communicated with the drainage gallery, and the other end of each deep drainage hole extends into the mountain to enlarge the drainage coverage area of the drainage gallery.

The deep drainage holes at the end part of the drainage gallery are arranged in an upper layer and a lower layer, and the deep drainage holes at the upper layer are vertically tilted upwards by a certain angle from the end communicated with the drainage gallery to the other end; the lower deep drain hole horizontally expands outwards for a certain angle from the end communicated with the drain gallery to the other end to jointly form an expanded three-dimensional protection area.

The deep drainage hole (2) can be drilled after the consolidation grouting of surrounding rocks within 30m around the deep drainage hole is finished and the deep drainage hole is checked to be qualified. When the deep drainage hole is constructed, the deflection degree of the drilled hole is strictly controlled, and the allowable deviation value of the hole bottom and the hole depth meets the requirement of engineering specifications. Before the next process, each drainage hole is capped or protected by measures to avoid blockage.

The utility model has the advantages that: the utility model discloses a set up dark wash port at drainage gallery tip and enlarge drainage gallery's drainage coverage, make drainage gallery need not to deepen the massif depths along with diversion tunnel, shorten drainage gallery's axial excavation length greatly, reduce the construction degree of difficulty, shorten the engineering time, save the construction investment.

Drawings

Fig. 1 is a schematic structural diagram of the prior art.

Fig. 2 is a schematic structural diagram of the embodiment.

Fig. 3 is a schematic end view of the embodiment.

Detailed Description

The embodiment is a novel drainage gallery tip arrangement structure, has drainage gallery 1, has arranged a plurality of deep wash ports 2 to drainage gallery port the place ahead massif depths at the both ends tip of

drainage gallery

1, and 2 one end of deep wash port communicate with drainage gallery 1, and this deep wash port other end is deep in the massif to enlarge the drainage coverage of drainage gallery under the condition that does not increase drainage gallery axial length.

In the embodiment, the end part of the drainage gallery is provided with three deep drainage holes 2 which are distributed in a quincunx shape, and the deep drainage holes 2 positioned on the upper layer are vertically inclined upward by a certain angle from the end communicated with the drainage gallery 1 to the other end; the deep drain holes on the lower layer horizontally expand outward by a certain angle from the end communicated with the drain gallery to the other end, and the distance between the three deep drain holes gradually increases forwards along the axial direction of the drain gallery.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A novel drain gallery end arrangement, has a drain gallery (1), characterized in that: the drainage gallery is characterized in that a plurality of deep drainage holes (2) are formed in the mountain body in front of the end part of the drainage gallery, one end of each deep drainage hole (2) is communicated with the drainage gallery (1), and the other end of each deep drainage hole (2) extends into the mountain body so as to enlarge the drainage coverage range of the drainage gallery (1).

2. The novel drain gallery end arrangement of claim 1, wherein: the deep drain holes (2) at the end part of the drainage gallery (1) are arranged in an upper layer and a lower layer, and the upper deep drain holes (2) are vertically tilted upwards by a certain angle from the end communicated with the drainage gallery (1) to the other end; the lower deep drainage hole (2) horizontally expands a certain angle from the end communicated with the drainage gallery (1) to the other end.