Layout structure of tail adjustment ventilation tunnel and traffic tunnel of underground water supply system

Abstract

The invention discloses a tail-adjustment ventilation tunnel and traffic tunnel arrangement structure of an underground water delivery system. In the early design stage of the water delivery system, a geological exploration cave is arranged along the water delivery line. The tail-adjustment chamber is arranged in the tail water part of the water delivery line. The entrance of the tail-adjustment ventilation tunnel and traffic tunnel coincides with the entrance of the geological exploration cave. The tail-adjustment ventilation tunnel and traffic tunnel connected between the entrance and the tail-adjustment chamber is divided into a first section, a second section, and a third section. The first section, the second section, and the third section are designed with equal sections. The tunnel line of the first section of the tail-adjustment ventilation tunnel and traffic tunnel connected to the entrance coincides with the tunnel line of the geological exploration cave. The third section of the tail-adjustment ventilation tunnel and traffic tunnel connected to the tail-adjustment chamber is provided with a return tunnel. The tunnel line of the second section of the tail-adjustment ventilation tunnel and traffic tunnel connecting the first section and the third section is an "S"-shaped curve. It is arranged in combination with the geological exploration cave, and has a simple structure, convenient construction, and is economical and safe.

Description

Technical Field

[0001] The invention relates to a water delivery system of a water conservancy and hydropower project, and in particular to a tail adjustment ventilation tunnel and traffic tunnel arrangement structure of an underground water delivery system combined with geological cave exploration. Background Art

[0002] When the underground water transmission and power generation system adopts the head type and the middle type plant, it is generally arranged with an underground buried tail adjustment room. In order to meet the exhaust, air replenishment and daily inspection of the tail adjustment room, it is necessary to set up a ventilation hole and a traffic hole for the tail adjustment room. If an independent tail adjustment ventilation hole and traffic hole are set up, the investment will be large; if it is connected to the ventilation and safety hole of the underground plant, some investment can be saved, but during the construction period, the construction of the tail adjustment room and the ventilation hole will interfere with the construction of the ventilation and safety hole and the underground plant, affecting the construction progress. In order to explore the surrounding rock conditions of the underground caverns in advance, water conservancy and hydropower projects generally arrange geological exploration holes along the water transmission system line in the early design stage, and the tail adjustment room is arranged in the tail water part of the water transmission system. Therefore, it is possible to consider the combination of the tail adjustment ventilation hole and the traffic hole with the geological exploration hole. Summary of the invention

[0003] The purpose of the present invention is to provide a tail-adjustment ventilation tunnel and traffic tunnel arrangement structure for an underground water delivery system, which is combined with geological exploration holes to not only save engineering investment but also facilitate construction and operation.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is as follows: a tail-adjustment ventilation tunnel and traffic tunnel arrangement structure of an underground water supply system, in which geological exploration holes are arranged along the water supply line in the early design stage of the water supply system, and the tail-adjustment chamber is arranged in the tail water part of the water supply line, and the entrance of the tail-adjustment ventilation tunnel and traffic tunnel coincides with the entrance of the geological exploration hole, and the tail-adjustment ventilation tunnel and traffic tunnel connected between the entrance and the tail-adjustment chamber is divided into a first section, a second section, and a third section, and the first section, the second section, and the third section are designed with equal sections, and the tunnel line of the first section of the tail-adjustment ventilation tunnel and traffic tunnel connected to the entrance coincides with the tunnel line of the geological exploration hole, and the third section of the tail-adjustment ventilation tunnel and traffic tunnel connected to the tail-adjustment chamber is provided with a return tunnel, and the tunnel line of the second section of the tail-adjustment ventilation tunnel and traffic tunnel connecting the first section and the third section is an "S"-shaped curve.

[0005] The cross-section of the tail adjustment ventilation tunnel and traffic tunnel is larger than the cross-section of the geological exploration tunnel.

[0006] The entrance to the cave is adjacent to the external traffic road.

[0007] In the first section of the tail-adjustment ventilation tunnel and traffic tunnel, the excavation section of the geological exploration tunnel is completely contained in the excavation section of the tail-adjustment ventilation tunnel and traffic tunnel.

[0008] A step is arranged at the end of the tail adjustment ventilation hole and traffic hole leading to the middle partition wall of the tail adjustment room.

[0009] The beneficial effects of the present invention are: it not only meets the ventilation and patrol traffic requirements of the tail adjustment room during operation, simplifies the terminal structure of the tail adjustment ventilation tunnel and traffic tunnel, and helps to stabilize the surrounding rock of the underground cavern; it also facilitates the construction of the tail adjustment room and the tail adjustment ventilation tunnel and traffic tunnel, and saves engineering workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a plan view of the layout structure of the tail adjustment ventilation tunnel and traffic tunnel of the underground water delivery system of the present invention;

[0011] Figure 2 It is a longitudinal section schematic diagram of the arrangement structure of the tail adjustment ventilation tunnel and traffic tunnel of the underground water delivery system of the present invention;

[0012] Figure 3 It is a schematic diagram of the terminal structure of the tail-adjustment ventilation tunnel and traffic tunnel arrangement structure of the underground water delivery system of the present invention;

[0013] In the figure: 1---tail-adjustment ventilation tunnel and traffic tunnel; 2---geological exploration cave; 3---entrance; 4---the first section of the tail-adjustment ventilation tunnel and traffic tunnel; 5---the second section of the tail-adjustment ventilation tunnel and traffic tunnel; 6---the third section of the tail-adjustment ventilation tunnel and traffic tunnel; 7---return tunnel; 8---tail-adjustment room; 9---middle partition wall; 10---external traffic road. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0015] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0016] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] like Figure 1-3 As shown, the arrangement structure of the tail-adjustment ventilation tunnel and traffic tunnel of the underground water supply system of the present invention is that a geological exploration cave 2 is arranged along the water supply line in the early design stage of the water supply system, and the tail-adjustment chamber 8 is arranged in the tail water part of the water supply line. The entrance 3 of the tail-adjustment ventilation tunnel and traffic tunnel 1 coincides with the entrance of the geological exploration cave 2, and the tail-adjustment ventilation tunnel and traffic tunnel 1 connected between the entrance 3 and the tail-adjustment chamber 8 is divided into a first section 4, a second section 5, and a third section 6. The first section 4, the second section 5, and the third section 6 are designed with equal sections. The tunnel line of the first section 4 of the tail-adjustment ventilation tunnel and traffic tunnel connected to the entrance 3 coincides with the tunnel line of the geological exploration cave 2, and the third section 6 of the tail-adjustment ventilation tunnel and traffic tunnel connected to the tail-adjustment chamber 8 is provided with a return tunnel 7, and the tunnel line of the second section 5 of the tail-adjustment ventilation tunnel and traffic tunnel connecting the first section 4 and the third section 6 is an "S"-shaped curve.

[0018] The cross section of the tail-adjustment ventilation tunnel and traffic tunnel 1 is larger than the cross section of the geological exploration tunnel 2. The entrance 3 is adjacent to the external traffic road 10. That is to say, on the first section 4 of the tail-adjustment ventilation tunnel and traffic tunnel, the excavation section of the geological exploration tunnel 2 is completely contained in the excavation section of the tail-adjustment ventilation tunnel and traffic tunnel 1.

[0019] The end of the tail adjustment ventilation hole and traffic hole 1 is provided with steps leading to the middle partition wall 9 of the tail adjustment room 8. In order to facilitate the inspection of the tail adjustment room.

[0020] The present invention not only meets the ventilation and patrol traffic requirements of the tail adjustment room during operation, simplifies the terminal structure of the tail adjustment ventilation tunnel and traffic tunnel, and helps to stabilize the surrounding rock of the underground cavern; it also facilitates the construction of the tail adjustment room and the tail adjustment ventilation tunnel and traffic tunnel, and saves engineering workload.

[0021] The following is a detailed description with reference to specific embodiments:

[0022] In a pumped storage power station project, the underground powerhouse adopts the head development method, and an underground buried tailing chamber is arranged in the water transmission and power generation system. In the feasibility study stage, in order to explore the surrounding rock conditions of the underground cavern in advance, the entrance to the cavern was selected near the external traffic (Y3 Highway), and the geological exploration cave PD201 was constructed. The geological exploration cave PD201 passes through the upper chamber of the tailing chamber and is close to the top arch. It is located on the left half of the power generation water flow direction of the tailing chamber in the plane. The cross section of the geological exploration cave PD201 is a city gate cave type, 2.5m wide and 2.2m high, with a designed longitudinal slope of 1.303%. It is a reverse slope form with a low cave entrance and a high cave to facilitate water discharge. The pile number at the intersection of the geological exploration cave PD201 and the center line of the tailing chamber is about 605m. The entrance of the tail-adjustment ventilation tunnel and traffic tunnel coincides with the entrance of the geological exploration cave PD201. The tunnel line of the tail-adjustment ventilation tunnel and traffic tunnel includes 3 sections. The tunnel line of the first section of the tail-adjustment ventilation tunnel and traffic tunnel coincides with the tunnel line of the geological exploration cave; the tunnel line of the second section of the tail-adjustment ventilation tunnel and traffic tunnel is arranged in an "S" curve, including two turns and a straight section; the third section of the tail-adjustment ventilation tunnel and traffic tunnel does not have a section expansion section, but is equipped with a return tunnel. The return tunnel is 12.5m deep and has the same section as the tail-adjustment ventilation tunnel and traffic tunnel. The side walls on both sides are connected by arcs. The top of the tail-adjustment ventilation tunnel and traffic tunnel is equal to the top of the tail-adjustment room, which is 304.260m. The cross section of the tail-adjustment ventilation tunnel and traffic tunnel is a city gate tunnel type, 5m wide and 5m high, which is larger than the cross section of the geological exploration cave. The first section of the tail-adjustment ventilation tunnel and traffic tunnel adopts a reverse slope design with a longitudinal slope of 1.041%. The cave top of the terminal section has the same elevation as the cave top of the geological exploration tunnel here. In the first section of the tail-adjustment ventilation tunnel and traffic tunnel, the section of the geological exploration tunnel is truly included in the section of the tail-adjustment ventilation tunnel and traffic tunnel.

[0023] The end floor elevation of the tail-adjustment ventilation tunnel and traffic tunnel is 299m, and the top elevation of the middle partition wall of the tail-adjustment room is 300m, with steps connecting them. The total length of the tail-adjustment ventilation tunnel and traffic tunnel is 603m, of which 542m is the length of geological exploration caves, with a utilization rate of about 90%.

[0024] The embodiments described above are only used to illustrate the technical ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. The patent scope of the present invention cannot be limited only by this embodiment, that is, any equivalent changes or modifications made to the spirit disclosed by the present invention still fall within the patent scope of the present invention.

Claims

1. A tail-adjustment ventilation tunnel and traffic tunnel arrangement structure of an underground water delivery system, wherein a geological exploration cave (2) is arranged along the water delivery line in the early design stage of the water delivery system, and a tail-adjustment chamber (8) is arranged in the tail water part of the water delivery line, characterized in that: The entrance (3) of the tail-adjustment ventilation tunnel and traffic tunnel (1) coincides with the entrance of the geological exploration tunnel (2); the tail-adjustment ventilation tunnel and traffic tunnel (1) connected between the entrance (3) and the tail-adjustment chamber (8) is divided into a first section (4), a second section (5), and a third section (6); the first section (4), the second section (5), and the third section (6) are designed with equal cross-sections; the tunnel line of the first section (4) of the tail-adjustment ventilation tunnel and traffic tunnel connected to the entrance (3) coincides with the tunnel line of the geological exploration tunnel (2); the third section (6) of the tail-adjustment ventilation tunnel and traffic tunnel connected to the tail-adjustment chamber (8) is provided with a return tunnel (7); the tunnel line of the second section (5) of the tail-adjustment ventilation tunnel and traffic tunnel connecting the first section (4) and the third section (6) is an "S"-shaped curve; the cross-section of the tail-adjustment ventilation tunnel and traffic tunnel (1) is larger than the cross-section of the geological exploration tunnel (2); and the entrance (3) is adjacent to an external traffic road (10).

2. The tail adjustment ventilation tunnel and traffic tunnel arrangement structure of the underground water delivery system according to claim 1 is characterized in that: In the first section (4) of the tail-adjustment ventilation tunnel and traffic tunnel, the excavation section of the geological exploration cave (2) is completely contained in the excavation section of the tail-adjustment ventilation tunnel and traffic tunnel (1).

3. The tail adjustment ventilation hole and traffic hole arrangement structure of the underground water delivery system according to claim 1 is characterized in that: The end of the tail-adjustment ventilation hole and traffic hole (1) is provided with steps leading to the middle partition wall (9) of the tail-adjustment room (8).

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