Fireproof and moistureproof integrated structure for draft tube layer of pumped storage power station
By installing a drainage system and fireproof walls in the tailrace layer of the pumped storage power station, the problems of poor drainage and insufficient fire protection have been solved, achieving good moisture-proof and fire-proof effects and improving environmental comfort and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- POWERCHINA BEIJING ENG CORP
- Filing Date
- 2025-04-18
- Publication Date
- 2026-04-10
AI Technical Summary
The tailrace layer of pumped storage power stations suffers from poor drainage, high air humidity, and insufficient fire protection, leading to leakage, mold growth, and safety hazards.
The underground powerhouse adopts a gate-shaped tailrace pipe layer for the unit section, and is equipped with drainage ditches, system drainage holes, drainage flower pipes and drainage pipes. Combined with fireproof partitions, it forms an integrated fireproof and moisture-proof structure, including impermeable concrete drainage ditches, autoclaved lime-sand brick fireproof partitions and enclosed stairwells.
It effectively reduces humidity in the tailwater pipe layer, improves environmental comfort, reduces maintenance frequency, enhances fire safety, and creates a more comfortable and safe working environment.
Smart Images
Figure CN224106387U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the water and electricity and pumped storage power station building technical field, concretely relates to a kind of pumped storage power station tailrace pipe layer fireproof and moistureproof integrated structure. BACKGROUND
[0002] Pumped storage power station underground powerhouse unit section tailrace pipe layer and lower layer drainage gallery are located at the bottom layer of underground powerhouse, and the seepage water of surrounding rock of underground powerhouse flows to lower layer drainage gallery, and then is discharged to sump well.The traditional above-mentioned arrangement has the following problems:
[0003] 1, poor drainage effect: the seepage water of surrounding rock cannot be discharged in time, which leads to multiple leakage points in tailrace pipe layer concrete wall and ground, and the effect of treatment by grouting and other plugging measures is not good.
[0004] 2, air humidity is big: because the seepage water of surrounding rock cannot be discharged in time, which leads to long-term over-standard air humidity of tailrace pipe layer, causes tailrace pipe layer decoration wall surface long-term damp, mildew, and is not easy to handle;At the same time, because tailrace pipe layer and auxiliary powerhouse, upward stairwell are all open type connection, which leads to the rising of humidity through stairwell and other channels above tailrace pipe layer, auxiliary powerhouse, etc., which leads to the damp and mildew of surrounding wall, and the damp of equipment affects operation.
[0005] 3, insufficient fireproof separation: there is lack of effective fireproof separation between tailrace pipe layer and lower layer drainage gallery, auxiliary powerhouse and other areas, which has safety hazard. INVENTION CONTENTS
[0006] In view of the defects in the prior art, the utility model provides a kind of pumped storage power station tailrace pipe layer fireproof and moistureproof integrated structure, which can effectively solve the above problems.
[0007] The technical scheme adopted by the utility model is as follows:
[0008] The utility model provides a kind of pumped storage power station tailrace pipe layer fireproof and moistureproof integrated structure, including underground powerhouse unit section tailrace pipe layer (1), drainage ditch (3), system drainage hole (4), lower layer drainage gallery (7), sump well (8), drainage flower pipe (9) and drainage pipe (10);
[0009] The underground powerhouse unit section tailrace pipe layer (1) adopts city gate type, and the bottom two sides are provided with drainage ditch (3), and the drainage end of drainage ditch (3) is communicated with the water inlet end of lower layer drainage gallery (7);The water inlet end of lower layer drainage gallery (7) is communicated with the water inlet end of sump well (8);
[0010] The system drainage hole (4) is arranged on the inner side of the surrounding rock of the tail water pipe layer (1) of the underground power plant unit section, the drainage flower pipe (9) is arranged in communication at the drainage end of the system drainage hole (4), the drainage end of the drainage flower pipe (9) is in communication with the water inlet end of the drainage pipe (10), the drainage pipe (10) is arranged in the tail water pipe layer (1) of the underground power plant unit section, and the drainage end of the drainage pipe (10) is directed to the drainage ditch (3).
[0011] Preferably, the size of the tail water pipe layer (1) of the underground power plant unit section is not less than 3.0m in height and 2.5m in width.
[0012] Preferably, the drainage ditch (3) is made of anti-permeable concrete, has a cross-sectional size of not less than 300mm in height and 300mm in width, and has a slope of not less than 1%.
[0013] Preferably, the system drainage hole (4) has a hole inclination of 20-30°, a hole diameter of 50mm, a depth of 3.0-5.0m, and an interval of 2-4m.
[0014] Preferably, the drainage flower pipe (9) has a pipe diameter of 50mm and a length of 0.3m, and is wrapped with non-woven fabric for reverse filtration.
[0015] Preferably, the tail water pipe layer (1) of the underground power plant unit section is adjacent to the auxiliary power plant (2) and the stairwell (5).
[0016] Fireproof partition walls (6) are arranged between the tail water pipe layer (1) of the underground power plant unit section and the auxiliary power plant (2), between the tail water pipe layer (1) of the underground power plant unit section and the stairwell (5), and between the tail water pipe layer (1) of the underground power plant unit section and the lower layer drainage corridor (7).
[0017] Preferably, the fireproof partition wall (6) is made of autoclaved sand-lime bricks and has a thickness of more than 240mm.
[0018] Preferably, the fireproof partition wall (6) is provided with a Class A fireproof door.
[0019] Preferably, the stairwell (5) is a closed stairwell and connects the tail water pipe layer (1) of the underground power plant unit section and the upper space.
[0020] The pumped storage power station tail water pipe layer fireproof and moistureproof integrated structure has the following advantages:
[0021] The pumped storage power station tail water pipe layer fireproof and moistureproof integrated structure has the following advantages: The pumped storage power station tail water pipe layer fireproof and moistureproof integrated structure can greatly reduce the air humidity of the tail water pipe layer, the lower layer drainage corridor and other areas, improve the environmental comfort, and reduce the maintenance frequency. Attached Figure Description
[0022] Figure 1 A plan view of the integrated fireproof and moisture-proof structure of the tailrace layer of the pumped storage power station provided by this utility model;
[0023] Figure 2 Provided by this utility model Figure 1 Sectional view of AA in the middle;
[0024] Figure 3 Provided by this utility model Figure 1 Cross-sectional view of the middle section (BB);
[0025] Figure 4 Provided by this utility model Figure 2 , Figure 3 Detailed diagram of node A in the middle. Detailed Implementation
[0026] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0027] This invention provides an integrated fireproof and moisture-proof structure for the tailrace layer of a pumped storage power station, which offers excellent moisture-proof and fireproof performance. The integrated fireproof and moisture-proof structure for the tailrace layer of a pumped storage power station provided by this invention can significantly reduce air humidity in the tailrace layer, lower drainage corridor, and other areas, improving environmental comfort and reducing maintenance frequency.
[0028] See Figures 1-4 This utility model provides an integrated fireproof and moisture-proof structure for the tailrace layer of a pumped storage power station, including an underground powerhouse unit section tailrace layer 1, a drainage ditch 3, a system drainage hole 4, a lower drainage corridor 7, a water collection well 8, a drainage flower pipe 9, and a drainage pipe 10.
[0029] The tailrace pipe layer 1 of the underground powerhouse unit section adopts a city gate shape, with drainage ditches 3 set on both sides of its bottom. The drainage end of the drainage ditch 3 is connected to the water inlet of the lower drainage corridor 7. The drainage end of the lower drainage corridor 7 is connected to the water inlet of the collection well 8. On the inner side of the underground powerhouse unit section tailrace pipe layer 1 adjacent to the surrounding rock, a system drainage hole 4 is set. A drainage perforated pipe 9 is connected to the drainage end of the system drainage hole 4. The drainage end of the drainage perforated pipe 9 is connected to the water inlet of the drainage pipe 10. The drainage pipe 10 is arranged in the underground powerhouse unit section tailrace pipe layer 1, and the drainage end of the drainage pipe 10 faces the drainage ditch 3.
[0030] In practical application, the tail water pipe layer 1 of the underground powerhouse unit section is a city gate type, and its size is not less than 3.0m in height and 2.5m in width, and is downwardly inclined to the drainage gallery 7.
[0031] After the tail water pipe layer 1 of the underground powerhouse unit section is constructed, the system drainage hole 4 is formed by being drilled on the side of the temporary surrounding rock in the tail water pipe layer 1 of the underground powerhouse unit section to form a drainage system.
[0032] The drainage flower pipe 9 is arranged at the outlet of the system drainage hole 4, the drainage flower pipe 9 has a pipe diameter of 50mm and a length of 0.3m, and is wrapped with non-woven fabric for reverse filtration.
[0033] The drainage pipe 10 is connected to the drainage flower pipe 9 to guide water into the drainage ditch 3 at the bottom of the tail water pipe layer 1 of the underground powerhouse unit section.
[0034] The construction mode is as follows:
[0035] In the construction of the system drainage hole 4, a professional geological drilling machine is used to drill the hole according to the design requirements of the hole inclination, the hole diameter and the depth, the hole inclination deviation is monitored in real time during the drilling process, and the deviation is controlled within ±1° to prevent the system drainage hole 4 from being deviated to affect the drainage effect; after the drilling is completed, the hole is cleaned in time to avoid the drainage hole being blocked.
[0036] When the formwork of the drainage ditch 3 is installed, the formwork is tightly spliced without leakage, the formwork support is firm, and deformation is prevented during pouring of the concrete; the concrete pouring is performed in a layered pouring mode, the thickness of each layer is not more than 300mm, the inserted vibrating rod is used for vibration, the vibration time is controlled to be 20-30 seconds / time, and the concrete surface is no longer bubbled and spattered, so that the concrete compactness is ensured and the impermeability is improved.
[0037] When the drainage system is accepted, the flow measuring instrument is used to detect the drainage flow of the drainage ditch 3 and the system drainage hole 4, under the normal seepage condition, the drainage flow of the drainage ditch 3 should be not less than 90% of the design flow; the water injection test is performed on the system drainage hole 4 to check whether the system drainage hole 4 is smoothly drained, and the system drainage hole 4 should not be blocked within 5 minutes after the water injection.
[0038] The utility model provides a kind of pumped storage power station tail water pipe layer fireproof and moistureproof integrated structure, and its drainage principle is:
[0039] The water of the surrounding rock seeps through the system drainage hole 4, flows through the drainage flower pipe 9 and the drainage pipe 10 in turn, is introduced into the drainage ditch 3 of the tail water pipe layer 1 of the unit section of the underground powerhouse, and then flows into the lower drainage corridor 7 through the drainage ditch 3, and the lower drainage corridor 7 further drains the water to the water collecting well 8.
[0040] In order to enhance the fireproof performance of the tail water pipe layer 1 of the unit section of the underground powerhouse, the tail water pipe layer 1 of the unit section of the underground powerhouse is adjacent to the auxiliary powerhouse 2 and the stairwell 5; the stairwell 5 is a closed stairwell and connects the tail water pipe layer 1 of the unit section of the underground powerhouse and the upper space. The fireproof partition wall 6 is arranged between the tail water pipe layer 1 of the unit section of the underground powerhouse and the auxiliary powerhouse 2, between the tail water pipe layer 1 of the unit section of the underground powerhouse and the stairwell 5, and between the tail water pipe layer 1 of the unit section of the underground powerhouse and the lower drainage corridor 7. The fireproof partition wall 6 is made of autoclaved sand lime bricks and has a thickness greater than 240 mm. The fireproof partition wall 6 is provided with a class A fireproof door to ensure fire safety.
[0041] In actual construction, the fireproof sealing glue is used to fill the brick joints of the fireproof partition wall 6 to ensure that the gaps are tight and prevent moisture and smoke from penetrating; the expansion type fireproof and moisture-proof paint is applied on the surface of the fireproof partition wall 6 to enhance the fireproof performance and improve the moisture resistance and permeability resistance of the wall body, thereby prolonging the service life of the fireproof partition wall 6.
[0042] The fireproof performance tester is used to test the fireproof performance of the fireproof partition wall 6, and the fire resistance limit of the fireproof partition wall 6 should meet the requirement of not less than 2.0 h;
[0043] The fireproof and moisture-proof integrated structure of the tail water pipe layer of the pumped storage power station has the following advantages:
[0044] (1) The drainage design of the "system drainage hole + drainage ditch + drainage corridor + water collecting well" of the tail water pipe layer, the lower drainage corridor, the drainage ditch and the water collecting well is systematically and cooperatively arranged to solve the problems of water seepage and moisture and reduce the moisture rising to the upper part of the tail water pipe layer, thereby reducing the humidity of the tail water pipe layer and keeping the upper space dry.
[0045] (2) The peeling and mildewing of the wall surface and the top arch decoration materials above the tail water pipe layer are prevented, and the safety and health problems are solved, thereby creating a more comfortable and safe working environment.
[0046] (3) The moisture resistance efficiency and safety of the tail water pipe layer of the pumped storage power station are significantly improved, and an innovative solution is provided for the moisture resistance field of underground engineering.
[0047] The preferred embodiments of the utility model are described above, and it should be noted that, for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the utility model, and these improvements and refinements should be regarded as the protection scope of the utility model.
Claims
1. A fire and moisture-proof integrated structure for the tailrace of a pumped storage power station, characterized in that, The tail water pipe layer (1) of the underground powerhouse unit section, the drainage ditch (3), the system drainage hole (4), the lower drainage corridor (7), the water collecting well (8), the drainage flower pipe (9) and the drainage pipe (10); The tail water pipe layer (1) of the underground powerhouse unit section is in the shape of a city gate, and drainage ditches (3) are arranged at the bottom of two sides of the tail water pipe layer (1); the drainage ends of the drainage ditches (3) are communicated with the water inlet ends of the lower drainage corridors (7); the drainage ends of the lower drainage corridors (7) are communicated with the water inlet ends of the water collecting wells (8); The system drainage holes (4) are arranged on the inner side of the surrounding rock of the tail water pipe layer (1) of the underground powerhouse unit section; the drainage flower pipes (9) are arranged at the drainage ends of the system drainage holes (4); the drainage ends of the drainage flower pipes (9) are communicated with the water inlet ends of the drainage pipes (10); the drainage pipes (10) are arranged in the tail water pipe layer (1) of the underground powerhouse unit section, and the drainage ends of the drainage pipes (10) are directed to the drainage ditches (3).
2. The tailrace layer fire and moisture prevention integrated structure of a pumped storage power station according to claim 1, characterized in that, The size of the tail water pipe layer (1) of the underground powerhouse unit section is not less than 3.0m in height and 2.5m in width.
3. The tailrace layer fire and moisture prevention integrated structure of a pumped storage power station according to claim 1, characterized in that, The drainage ditches (3) are made of anti-permeation concrete, and the cross-sectional size is not less than 300mm in height and 300mm in width, and the slope is not less than 1%.
4. The tailrace layer fire and moisture prevention integrated structure of a pumped storage power station according to claim 1, characterized in that, The system drainage holes (4) are inclined at an angle of 20-30°, have a hole diameter of 50mm, a depth of 3.0-5.0m and an interval of 2-4m.
5. The tailrace layer fire and moisture prevention integrated structure of a pumped storage power station according to claim 1, characterized in that, The drainage flower pipes (9) have a pipe diameter of 50mm, a length of 0.3m and are wrapped with non-woven fabric for reverse filtration.
6. The tailrace layer fire and moisture prevention integrated structure of a pumped storage power station according to claim 1, characterized in that, The tail water pipe layer (1) of the underground powerhouse unit section is adjacent to the auxiliary powerhouse (2) and the stairwell (5). Fireproof walls (6) are arranged between the tail water pipe layer (1) of the underground powerhouse unit section and the auxiliary powerhouse (2), between the tail water pipe layer (1) of the underground powerhouse unit section and the stairwell (5) and between the tail water pipe layer (1) of the underground powerhouse unit section and the lower drainage corridor (7).
7. The tailrace layer fire and moisture prevention integrated structure of a pumped storage power station according to claim 6, characterized in that, The fireproof walls (6) are made of autoclaved sand-lime bricks and have a thickness of more than 240mm.
8. The tailrace layer fire and moisture proof integrated structure of pumped storage power station according to claim 6, characterized in that, The fireproof walls (6) are provided with Class A fireproof doors.
9. The tailrace layer fire and moisture proof integrated structure of pumped storage power station according to claim 6, characterized in that, The stairwell (5) is a closed stairwell and connects the tail water pipe layer (1) of the underground powerhouse unit section and the space above.