CN217378787U

CN217378787U - Novel earth and rockfill dam crest structure

Info

Publication number: CN217378787U
Application number: CN202221269436.7U
Authority: CN
Inventors: 高杉; 张艺; 刘晓平; 宁保辉; 黄杏成; 陈方旎; 崔酉; 瓮宛; 张浩东; 李琳; 孙熙; 张怀坤; 李飒; 范向辉; 于军; 李恩越; 杨金凯; 成晨光; 唐朝阳; 朱健聪
Original assignee: Henan Water and Power Engineering Consulting Co Ltd
Current assignee: Henan Water and Power Engineering Consulting Co Ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-09-06
Anticipated expiration: 2032-05-25

Abstract

The utility model discloses a novel earth and rockfill dam crest structure, include: the cable trench is arranged at the upstream of the dam crest, the front side wall of the cable trench is a wave-proof wall, and the bottom of the cable trench is provided with a water collecting tank; one side of the dam crest road is connected with the rear side wall of the cable trench, the other side of the dam crest road is positioned at the downstream of the crest and is provided with a curb stone, and a plurality of overflow ports are arranged on the curb stone at intervals; the drainage ditch is arranged on the downstream slope of the dam body, and the inlet ends of the drainage ditch correspond to the overflow ports respectively; and the drain pipe is arranged in the dam body, one end of the drain pipe is communicated with the water collecting tank, and the other end of the drain pipe is communicated with the drainage ditch. The utility model discloses having optimized arranging of functional component, not only having made the dam crest road surface widen, improved the current capacity, effectively prevented dam crest ponding moreover, it is very favorable to improving dam stability.

Description

Novel earth and rockfill dam crest structure

Technical Field

The utility model belongs to the technical field of the hydraulic engineering technique and specifically relates to a novel earth and rockfill dam crest structure is related to.

Background

The earth-rock dam is a water retaining dam built by earth materials, stone materials or mixture thereof through methods of throwing, filling, rolling and the like, has the advantages of simple structural design, local materials, low construction cost, strong adaptability to deformation and foundation, low construction process requirement and the like, and is widely applied. In addition to the traffic channel, the top of most earth-rock dams is provided with a wave wall at the upstream of the top of the dam, and a drainage ditch at the downstream of the top of the dam, so that the cable ditch at the top of the dam is usually arranged at one side of the downstream of the top of the dam close to the drainage ditch, and the top of the cable ditch is 10-20cm higher than the road surface of the top of the dam in consideration of flood control requirements. Because the functions of traffic, illumination, drainage and the like are integrated, the road surface at the top of the dam is narrowed, and the passing of special vehicles is limited; secondly, as the cable trench is higher than the road surface at the top of the dam, when rainstorm occurs, rainwater is collected at the front side of the cable trench, and if the phenomenon of infiltration occurs, the stability of a downstream dam slope is adversely affected; and thirdly, the cable trench is close to one side of the drainage ditch, the street lamp is installed at the top of the wave wall, and the street lamp needs to be powered from the bottom of the road surface at the top of the dam through a threading line, so that the cable consumption is increased, and the construction difficulty is also improved.

Disclosure of Invention

In order to solve the problem, the utility model provides a compact structure, easily construction, safety and stability's novel earth and rockfill dam crest structure specifically can take following technical scheme:

novel earth and rockfill dam crest structure, include

The cable trench is arranged at the upstream of the dam crest, the front side wall of the cable trench is a wave wall, and the bottom of the cable trench is provided with a water collecting tank;

one side of the dam crest road is connected with the rear side wall of the cable trench, the other side of the dam crest road is positioned at the downstream of the crest and is provided with a curb stone, and a plurality of overflow ports are arranged on the curb stone at intervals;

the drainage ditch is arranged on the downstream slope of the dam body, and the inlet ends of the drainage ditch correspond to the overflow ports respectively;

and the drain pipe is arranged in the dam body, one end of the drain pipe is communicated with the water collecting tank, and the other end of the drain pipe is communicated with the drainage ditch.

The drainage ditch is provided with many along dam axis direction interval.

The gradient of the dam crest road is 2%, and the dam crest road sequentially comprises a cement stabilized rubble layer, an emulsified asphalt seal layer, an asphalt concrete AC-16 layer and an asphalt concrete AC-13 layer from bottom to top.

The cable trench is of a reinforced concrete box structure provided with a cover plate, the front side wall of the cable trench is higher than the rear side wall of the cable trench, and the rear side wall of the cable trench is higher than a dam crest road.

The cable trench is internally provided with three layers of cable outriggers, the interlayer distance of the cable outriggers is 15cm, the interval between the upper layer of cable outriggers and the cover plate is 25cm, and the interval between the lower layer of cable outriggers and the bottom of the cable trench is at least 15 cm.

The water catch bowl is close to the back side wall setting of cable pit, and the tank bottom elevation of water catch bowl is less than the groove bottom elevation of cable pit.

The drain pipe is a galvanized steel pipe, and the drain pipe and the dam crest road are both arranged in a downward inclination mode from the upstream side to the downstream side of the dam body according to the gradient of 2%.

The road edge stones are 5cm higher than the dam crest road surface, and discharge increasing ports are also arranged between the overflow ports.

The width of the overflow port is 30cm, and the width of the drainage increasing port is 10 cm.

The utility model provides a novel earth and rockfill dam crest structure combines the cable pit with the wave wall and sets up the escape canal on the downstream slope of dam body, and the dam crest road only sets up the curbstone near dam body downstream one side, has optimized the arrangement of functional component, not only makes the road surface widen, has improved the trafficability ability, has made things convenient for the installation of street lamp cable moreover, has reduced construction cost; the water collecting tank is arranged in the cable trench and communicated with the drain pipe leading to the dam drainage trench, meanwhile, the dam crest pavement is obliquely and downwards arranged from the upstream side to the downstream side, and the curbstone is provided with the plurality of overflow ports, so that a complete dam crest drainage system is formed, water accumulation at the dam crest is effectively prevented, and the dam crest drainage system is very favorable for improving the stability of the dam.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of a connection structure of the cable trench and the upstream protection slope in fig. 1.

Fig. 3 is a schematic view of a connection structure of the curbstone, the dam crest road and the downstream revetment in fig. 1.

Fig. 4 is a schematic view of a connection structure of the curb and the drainage ditch of fig. 1.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific construction processes are given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1-4, novel earth and rockfill dam crest structure, including setting up wave wall 1 at the dam crest upper reaches, wave wall 1 adopts the C25 concrete capping with the junction of upper reaches bank protection, and the rear side combines the setting with concrete cable ditch 2, is about to wave wall 1 as the preceding side wall of cable ditch 2. The rear side wall of the cable trench is connected with a dam crest road 3, the dam crest road 3 is declined at a gradient of 2% from the upstream side to the downstream side of the dam body, a curbstone 4 is arranged on one side, close to the slope surface and the downstream side, of the dam crest road 3, the curbstone 4 is of a concrete structure, the width of the curbstone is 20-40cm, the top surface of the curbstone is 5cm higher than the dam crest road surface, and the curbstone is combined with downstream coping. A plurality of overflow ports 5 are arranged on the curbstone 4 at intervals along the axis direction of the dam, each overflow port 5 corresponds to a drainage ditch 6, the drainage ditches 6 are arranged along the downstream slope surface of the dam body, and one or more drainage pipes 7 extending out of the cable trench 2 are communicated. The width of above-mentioned wave wall 1, cable pit 2 and curbstone 4 amounts to about 1.4m, and its total width 2.6m with wave wall, cable pit and escape canal is prevented in traditional dam crest structure compares, has reduced by a wide margin and has taken up on the road surface, consequently adopts to the same dam to the scheme of the utility model, the width greatly increased of dam crest road 3, the current capacity promotes by a wide margin. Meanwhile, the cable trench 2 is arranged close to one side of the wave wall 1, so that a cable does not need to penetrate through a dam body when the street lamp is installed, the construction difficulty is greatly reduced, and the construction cost is saved.

The front side wall (namely the wave wall 1) of the cable trench 1 is higher than the rear side wall, the rear side wall is higher than the dam crest road 3, the dam crest road 3 is obliquely arranged, and an overflow port 5 corresponding to the drainage trench 5 is formed in the curbstone 4. Because the front side wall of the cable trench 1 has a higher water retaining position, flood can be effectively prevented from immersing the dam crest road 3; once flood overflows the front side wall of the cable trench 1 and enters the dam crest road 3, the dam crest road 3 has a slope, and the curbstone 4 is provided with the overflow port 5, so that the flood can be quickly discharged to the downstream, and the flood is prevented from accumulating on the dam crest road 3 to influence the safety of the dam. Furthermore, in order to accelerate flood discharge, an additional drainage port 8 is arranged between the overflow ports 5 of the road edge stones 4. Normally, the width of the overflow opening 5 is usually 30cm, and the width of the drainage opening 8 is 10 cm. When the flood water volume is small, the flood is discharged only through the overflow port 5 and the drainage increasing port 8; when the volume of flood water is further increased, it will flood downstream over the entire curb 4. The dam crest road 3 sequentially comprises a cement stabilized rubble layer, an emulsified asphalt seal layer, an asphalt concrete AC-16 layer and an asphalt concrete AC-13 layer from bottom to top, and has a good seepage-proofing effect.

The reinforced concrete cover plate is installed at the top of the cable trench 2, the water collecting tank 9 is arranged on one side, close to the rear side wall, of the bottom of the cable trench 2, the elevation of the bottom of the water collecting tank 9 is lower than that of the bottom of the cable trench 2, once flood enters the cable trench 2, the flood can be collected to the water collecting tank 9 and discharged into the downstream of a dam body through the water discharging pipe 7 on the water collecting tank 9, and therefore the situation that a cable is immersed into the water is avoided as much as possible. The drain pipe 7 is made of galvanized steel pipe and is embedded in the dam body according to the gradient of 2% until the drain pipe is communicated with a drain ditch 6 at the downstream of the dam body. The depth of the cable trench 2 is determined according to the number of cables, and can be 70-100cm, three layers of cable brackets 10 with the distance of 15cm are arranged in the cable trench, the distance between the upper layer of cable bracket 10 and the cover plate is 25cm, and the distance between the lower layer of cable bracket and the bottom of the cable trench 2 is at least 15 cm. The cable cantilever frames 10 are all formed by welding angle steels, are 3.5cm wide and 300mm long, and are bent upwards at the tail ends. In general, a 10kV power cable is laid on the upper layer cable scaffold 10, a 1kV or less power cable is laid on the middle layer cable scaffold 10, and a control cable and a signal cable are laid on the lower layer cable scaffold 10, thereby reducing the loss that may be caused in the flood.

It should be noted that in the description of the present invention, terms of orientation or positional relationship such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Claims

1. The utility model provides a novel earth and rockfill dam crest structure which characterized in that: comprises that

The cable trench is arranged at the upstream of the dam crest, the front side wall of the cable trench is a wave-proof wall, and the bottom of the cable trench is provided with a water collecting tank;

2. The novel earth and rock dam crest structure of claim 1, characterized in that: the drainage ditch is provided with many along dam axis direction interval.

3. The novel earth and rock dam crest structure of claim 1, characterized in that: the gradient of the dam crest road is 2%, and the dam crest road sequentially comprises a cement stabilized rubble layer, an emulsified asphalt seal layer, an asphalt concrete AC-16 layer and an asphalt concrete AC-13 layer from bottom to top.

4. The novel earth and rock dam crest structure of claim 1, characterized in that: the cable trench is of a reinforced concrete box structure provided with a cover plate, the front side wall of the cable trench is higher than the rear side wall of the cable trench, and the rear side wall of the cable trench is higher than a dam crest road.

5. The novel earth and rock dam crest structure of claim 4, wherein: the cable trench is internally provided with three layers of cable outriggers, the interlayer distance of the cable outriggers is 15cm, the interval between the upper layer of cable outriggers and the cover plate is 25cm, and the interval between the lower layer of cable outriggers and the bottom of the cable trench is at least 15 cm.

6. The novel earth and rock dam crest structure of claim 1, characterized in that: the water catch bowl is close to the back side wall setting of cable pit, and the tank bottom elevation of water catch bowl is less than the groove bottom elevation of cable pit.

7. The novel earth and rock dam crest structure of claim 1, characterized in that: the drain pipe is a galvanized steel pipe, and the drain pipe and the dam crest road are both arranged in a downward inclination mode from the upstream side to the downstream side of the dam body according to the gradient of 2%.

8. The novel earth and rock dam crest structure of claim 1, characterized in that: the road edge stones are 5cm higher than the dam crest road surface, and discharge increasing ports are also arranged between the overflow ports.

9. The novel earth and rock dam crest structure of claim 8, wherein: the width of the overflow port is 30cm, and the width of the drainage increasing port is 10 cm.