CN217710582U - Rolling and pouring combined asphalt concrete straight core wall dam - Google Patents
Rolling and pouring combined asphalt concrete straight core wall dam Download PDFInfo
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- CN217710582U CN217710582U CN202221517823.8U CN202221517823U CN217710582U CN 217710582 U CN217710582 U CN 217710582U CN 202221517823 U CN202221517823 U CN 202221517823U CN 217710582 U CN217710582 U CN 217710582U
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Abstract
The utility model relates to an earth and rockfill dam engineering technical field, concretely relates to roll and pour asphalt concrete straight core wall dam of combination. The core wall structure of the dam structure is erected on a concrete base. The upstream rockfill region is located on an upstream side of the core wall structure. The downstream rockfill region is located on the downstream side of the core wall structure. A first transition area is arranged between the upstream rockfill area and the core wall structure. The outside in upstream rockfill district is provided with the upper reaches bank protection. The bottom of the upstream revetment is provided with a bottom base platform connected with bedrock. A second transition area is arranged between the downstream rockfill area and the core wall structure. The outside in low reaches rockfill district is provided with the low reaches bank protection. The bottom of low reaches bank protection is provided with the drainage zone. A drain pipe is arranged in the drain area. The bottom of the rolled asphalt concrete wall in the core wall structure is connected with the concrete base. The top of the rolling type asphalt concrete wall is connected with the pouring type asphalt concrete wall. The dam body structure reduces the difficulty of mechanical operation, accelerates the construction progress and improves the construction quality.
Description
Technical Field
The utility model relates to an earth and rockfill dam engineering technical field, concretely relates to roll and pour straight core wall dam of asphalt concrete of combination.
Background
In water conservancy projects, an earth-rock dam refers to a water retaining building body formed by throwing, filling, rolling and stacking soil materials, stone materials or mixture materials. In order to improve the comprehensive performance of the earth and rockfill dam, an asphalt concrete core wall is usually constructed in the earth and rockfill dam as an impervious body structure of the dam body. The asphalt concrete core wall can be classified into rolling type and pouring type asphalt concrete according to different construction methods. The rolling type asphalt concrete is formed by manually or mechanically rolling and compacting an asphalt mixture mixed at a certain temperature. The pouring type asphalt concrete adopts higher asphalt dosage to improve the fluidity of the asphalt mixture and can be compacted under the action of self weight.
The rolling type asphalt concrete has the characteristics of low oilstone ratio, high strength, weak deformation capacity and the like, and has high degree of mechanization and high construction speed in the construction process, but the rolling type asphalt concrete has certain requirements on the construction temperature. For example, rolled asphalt concrete needs to be constructed in a temperature environment of 5 degrees celsius or higher. The pouring type asphalt concrete has the characteristic of stronger adaptive deformation capability, has simple construction process, low mechanization degree and low construction speed, and is suitable for medium and low height earth-rock dams.
In summary, how to design a dam body structure in the process of constructing an earth-rock dam to reduce the difficulty of mechanized operation, accelerate the construction progress, and improve the construction quality becomes a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
An object of the utility model is to provide a dam body structure for the in-process that the earth and rockfill dam was built for reduce the degree of difficulty of mechanized operation, accelerate the construction progress, promote construction quality.
In order to achieve the above purpose, the utility model adopts the following scheme: the asphalt concrete straight core wall dam combining rolling compaction and pouring comprises a concrete base poured on bedrock, a core wall structure, an upstream rockfill area and a downstream rockfill area, wherein the core wall structure is erected on the concrete base, the upstream rockfill area is located on the upstream side of the core wall structure, and the downstream rockfill area is located on the downstream side of the core wall structure;
a first transition area is arranged between the upstream rockfill area and the core wall structure, an upstream protection slope is arranged on the outer side of the upstream rockfill area, a bottom base is arranged at the bottom of the upstream protection slope, and the bottom base is connected with bedrock;
a second transition area is arranged between the downstream rockfill area and the core wall structure, a downstream revetment is arranged on the outer side of the downstream rockfill area, a drainage area is arranged at the bottom of the downstream revetment, and a drainage pipe is arranged in the drainage area;
the core wall structure includes roll formula asphalt concrete wall and pouring type asphalt concrete wall, the bottom and the concrete base of roll formula asphalt concrete wall link to each other, the top and the pouring type asphalt concrete wall of roll formula asphalt concrete wall link to each other.
Preferably, a sealing plate is arranged at the joint of the rolling type asphalt concrete wall and the pouring type asphalt concrete wall, a pre-embedded screw rod is arranged at the top of the rolling type asphalt concrete wall, one end of the sealing plate is connected with the pre-embedded screw rod through a connecting nut, and the other end of the sealing plate is embedded in the pouring type asphalt concrete wall. Due to the arrangement, on one hand, the sealing plate is used for enhancing the connection strength between the rolling type asphalt concrete wall and the pouring type asphalt concrete wall, so that the overall strength of the core wall structure is improved; and on the other hand, the sealing plate is used for improving the sealing performance of the joint, so that the seepage-proofing performance of the core wall structure is further improved.
Preferably, the concrete base is provided with a mounting seat, the mounting seat is provided with a groove matched with the rolling type asphalt concrete wall, and the bottom of the rolling type asphalt concrete wall is embedded with the groove. So set up, the mount pad is used for being connected of core structure and concrete foundation, and the formula asphalt concrete wall that rolls utilizes the recess as the location benchmark of construction, is favorable to guaranteeing the position precision of core structure, and then has promoted the construction quality who builds the earth-rock dam.
Preferably, the end of the core wall structure is connected to the bank slope through a connector base, an anchor bar is provided on a side wall of the bank slope, one end of the connector base is connected to the bank slope through the anchor bar, and the other end of the connector base has a step-shaped connection portion connected to the core wall structure. So set up, the connecting strength between tip and the bank slope of core wall structure has been strengthened greatly to the connecting seat, and then is favorable to the dam body structural stability of whole earth-rock dam.
Preferably, the bottom abutment is provided with an anchor rod, and the bottom abutment is connected with the bedrock through the anchor rod. So set up, the bottom base station is used for preventing that the upper reaches water from forming the erosion to the bottom in upper reaches rockfill district, has avoided upper reaches rockfill district to slide along the bed rock to the upstream side of radial wall structure, has further guaranteed the stability of dam structure.
Preferably, the top of the upstream rockfill area is provided with a wave wall, and the bottom of the wave wall is embedded in the upstream rockfill area. So set up, the wave wall has further increased the height of earth and rockfill dam, is favorable to preventing that the water that rises ripples with the wind from the upstream side downstream side overflow of core wall structure.
Preferably, a reverse filtering layer is arranged between the downstream rockfill area and the drainage area. So set up, the inverted filter is used for in drainage process, prevents that the water from carrying the soil body in low reaches rockfill district and losing together, forms the protection to low reaches rockfill district.
Preferably, the thickness of the rolled asphalt concrete wall is equal to the thickness of the cast asphalt concrete wall.
The utility model provides a pair of asphalt concrete straight core wall dam that rolls and pour the combination compares with prior art, has following substantive characteristics and progress: this bituminous concrete straight core wall dam that rolls and pour combination sets up the lower part of core structure into roll-compaction formula bituminous concrete wall, upper portion sets up to pouring bituminous concrete wall, the stress strain characteristic of core structure has been adapted to better, the support intensity and the deformation demand of dam body structure have been satisfied, and simultaneously, because dam body upper portion operation face is more and more littleer, the difficulty of large-scale mechanical equipment construction operation has effectively been avoided to upper portion pouring bituminous concrete wall, the whole construction progress has been accelerated, the construction quality of earth and rockfill dam has been guaranteed.
Drawings
Fig. 1 is a schematic structural view of a rolling and pouring combined asphalt concrete straight core wall dam in an embodiment of the present invention;
FIG. 2 is a schematic view of a connection structure of a core wall structure and a bank slope;
fig. 3 is a partially enlarged schematic view at a in fig. 1.
Reference numerals: 1. bedrock; 2. a concrete base; 3. a core wall structure; 4. an upstream rockfill zone; 5. a downstream rockfill zone; 6. slope protection at the upstream; 7. downstream slope protection; 8. a first transition zone; 9. a second transition zone; 10. a wave wall; 11. a bottom base station; 12. an anchor rod; 13. an inverted filter layer; 14. a drainage area; 15. a drain pipe; 16. a mounting seat; 17. a bank slope; 18. a connecting seat; 19. anchoring ribs; 20. sealing plates; 21. pre-burying a screw; 22. connecting a nut; 31. rolling the asphalt concrete wall; 32. and (5) pouring the asphalt concrete wall.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings.
The asphalt concrete straight core wall dam combining rolling compaction and pouring is used for optimizing the structure of the existing earth-rock dam, accelerating the construction progress and improving the construction quality as shown in figures 1-3. This combination formula asphalt concrete straight core wall dam sets up the lower part of core wall structure into rolling formula asphalt concrete wall, and upper portion sets up to pouring formula asphalt concrete wall, has adapted to the stress strain characteristic of core wall structure better, has satisfied the support intensity and the deformation demand of dam body structure. Meanwhile, as the upper operating surface of the dam body is smaller and smaller, the upper pouring type asphalt concrete wall effectively avoids the difficulty of construction operation of large-scale mechanical equipment, the overall construction progress is accelerated, and the construction quality of the earth-rock dam is ensured.
As shown in fig. 1, a combined roll-compaction and casting asphalt concrete straight core dam comprises a concrete foundation 2 cast on a bedrock 1, a core structure 3, an upstream rockfill area 4 and a downstream rockfill area 5. The core wall structure 3 is erected on the concrete foundation 2. The upstream rockfill region 4 is located on the upstream side of the core structure 3. The downstream rockfill section 5 is located on the downstream side of the core structure 3. A first transition zone 8 is provided between the upstream rockfill zone 4 and the core structure 3. The outer side of the upstream rockfill area 4 is provided with an upstream revetment 6. The bottom of the upstream protection slope 6 is provided with a bottom abutment 11. The bottom abutment 11 is connected to the bedrock 1. A second transition zone 9 is provided between the downstream rockfill section 5 and the core structure 3. The outer side of the downstream rockfill area 5 is provided with a downstream revetment 7. The bottom of the downstream revetment 7 is provided with a drainage area 14. A drain pipe 15 is provided in the drain region 14.
The core wall structure 3 includes a rolling asphalt concrete wall and a pouring asphalt concrete wall 32. The bottom of the rolled asphalt concrete wall 31 is connected to the concrete foundation 2. The top of the rolled asphalt concrete wall 31 is connected to a cast asphalt concrete wall 32. For example, in actual construction, the thickness of the rolled asphalt concrete wall 31 is equal to the thickness of the cast asphalt concrete wall 32.
The rolling type asphalt concrete is obtained by manually or mechanically rolling and compacting the asphalt mixture mixed at a certain temperature, has the characteristics of low oilstone ratio, high strength, weak deformability and the like, and can meet the requirement of a part with higher strength requirement in the dam engineering part. The pouring type asphalt concrete adopts higher asphalt dosage to improve the fluidity of the asphalt mixture, can be compacted under the action of self weight, has the characteristic of stronger adaptive deformability, and is suitable for engineering parts requiring higher deformation coordination in a dam body.
As shown in fig. 2, the end of the core structure 3 is connected to a bank slope 17 by a connecting socket 18. And the side wall of the bank slope 17 is provided with an anchor bar 19. One end of the connecting base 18 is connected with the bank slope 17 through an anchor bar 19. The other end of the connecting socket 18 has a step-like connection to the core structure 3. So set up, connecting seat 18 has strengthened the joint strength between core wall structure 3's tip and bank slope 17 greatly, and then is favorable to the dam body structural stability of whole earth and rockfill dam.
As shown in fig. 3, a sealing plate 20 is provided at the junction of the rolled asphalt concrete wall 31 and the cast asphalt concrete wall 32. The top of the rolling type asphalt concrete wall 31 is provided with a pre-buried screw 21. One end of the sealing plate 20 is connected to the embedded screw 21 by a coupling nut 22. The other end of the sealing plate 20 is embedded in a poured asphalt concrete wall 32.
In this way, the sealing plate 20 is used to enhance the connection strength between the rolling asphalt concrete wall 31 and the pouring asphalt concrete wall 32, so as to enhance the overall strength of the core wall structure 3; the sealing plate 20 is on the other hand used to improve the sealing properties of the joint and thus further improve the impermeability of the core structure 3.
As shown in fig. 1, the concrete foundation 2 is provided with a mounting base 16. The mounting base 16 has a groove that matches the rolled asphalt concrete wall 31. The bottom of the rolled asphalt concrete wall 31 is engaged with the groove. So set up, mount pad 16 is used for being connected of core structure 3 and concrete foundation 2, and roll-compaction formula asphalt concrete wall 31 utilizes the recess as the location benchmark of construction, is favorable to guaranteeing core structure 3's position precision, and then has promoted the construction quality of building the earth-rock dam.
In order to further improve the stability of the dam structure, as shown in fig. 1, an anchor rod 12 is arranged on the bottom abutment 11. The bottom abutment 11 is connected to the bedrock 1 by anchor rods 12. So set up, bottom base station 11 is used for preventing that the upper reaches water from forming the erosion to the bottom in upper reaches rockfill district 4, has avoided upper reaches rockfill district 4 to slide along bedrock 1 to the upstream side of radial wall structure 3, has further guaranteed the stability of dam structure.
An inverted filter layer 13 is arranged between the downstream rockfill area 5 and the drainage area 14. So set up, the inverted filter 13 is used for in the drainage process, prevents that the water from carrying the soil body in low reaches rockfill district 5 and losing together, forms the protection to low reaches rockfill district 5.
As shown in fig. 1, the top of the upstream rockfill area 4 is provided with a wave wall 10. The bottom of the breakwater 10 is embedded in the upstream rockfill zone 4. So set up, wave wall 10 has further increased the height of earth and rockfill dam, is favorable to preventing that the water that rises ripples along with the wind from the upstream side downstream side overflow of core wall structure 3.
The embodiment of the utility model provides an in when providing roll and pour the asphalt concrete straight core wall dam actual construction of combination, the structural style of upper reaches bank protection 6 can choose for use stone bank protection or concrete bank protection as required. The structural form of the downstream revetment 7 can be a turf revetment or a pebble gravel revetment. The rockfill materials in the upstream rockfill area 4 and the downstream rockfill area 5 are locally obtained according to the properties, reserves and distribution of various natural soil and stone materials near the dam site, so that the transportation cost of the rockfill materials is reduced. The transition stones in the first transition zone 8 and the second transition zone 9, which are located on both sides of the core wall structure 3, respectively, are preferably crushed stones or sand gravel. Wherein, the transition stone material is required to be dense, hard, weather-resistant and erosion-resistant, the grain composition is continuous, and the maximum grain diameter is not more than 50mm.
The core wall structure not only plays a role of dam body seepage prevention in the earth and rockfill dam, but also ensures that large stress concentration and deformation cannot be generated under the overstock effect of dam shell fillers. The thickness of the core wall structure is preferably between 1/100 and 1/60 of the height of the dam body according to design requirements. Wherein, the thickness of the top of the core wall is not less than 40 cm. For medium height earth and rockfill dam structures, the core wall structure may be of uniform thickness design.
The utility model discloses not be limited to the concrete technical scheme that above-mentioned embodiment said, except above-mentioned embodiment, the utility model discloses can also have other embodiments. It should be understood by those skilled in the art that any modifications, equivalent substitutions, improvements and the like that are made within the spirit and principle of the present invention are within the scope of the present invention.
Claims (8)
1. The rolling and pouring combined asphalt concrete straight core wall dam is characterized by comprising a concrete base poured on bedrock, a core wall structure, an upstream rockfill area and a downstream rockfill area, wherein the core wall structure is erected on the concrete base, the upstream rockfill area is positioned on the upstream side of the core wall structure, and the downstream rockfill area is positioned on the downstream side of the core wall structure;
a first transition area is arranged between the upstream rockfill area and the core wall structure, an upstream protection slope is arranged on the outer side of the upstream rockfill area, a bottom base is arranged at the bottom of the upstream protection slope, and the bottom base is connected with bedrock;
a second transition area is arranged between the downstream rockfill area and the core wall structure, a downstream protection slope is arranged on the outer side of the downstream rockfill area, a drainage area is arranged at the bottom of the downstream protection slope, and a drainage pipe is arranged in the drainage area;
the core wall structure includes roll formula asphalt concrete wall and pouring type asphalt concrete wall, the bottom and the concrete base of roll formula asphalt concrete wall link to each other, the top and the pouring type asphalt concrete wall of roll formula asphalt concrete wall link to each other.
2. The rolling and pouring combined asphalt concrete straight core wall dam according to claim 1, wherein a sealing plate is arranged at the joint of the rolling asphalt concrete wall and the pouring asphalt concrete wall, a pre-embedded screw rod is arranged at the top of the rolling asphalt concrete wall, one end of the sealing plate is connected with the pre-embedded screw rod through a connecting nut, and the other end of the sealing plate is embedded in the pouring asphalt concrete wall.
3. The rolling and pouring combined asphalt concrete straight core wall dam according to claim 2, wherein the concrete base is provided with a mounting seat, the mounting seat is provided with a groove matched with the rolling asphalt concrete wall, and the bottom of the rolling asphalt concrete wall is embedded with the groove.
4. The rolling and casting combined asphalt concrete straight core wall dam according to claim 1, wherein the end of the core wall structure is connected with the bank slope through a connecting base, the side wall of the bank slope is provided with an anchor bar, one end of the connecting base is connected with the bank slope through the anchor bar, and the other end of the connecting base is provided with a step-shaped connecting part connected with the core wall structure.
5. The rolling and casting combined asphalt concrete straight core wall dam according to claim 1, wherein anchor rods are arranged on the bottom abutment, and the bottom abutment is connected with the bedrock through the anchor rods.
6. The roll compaction and casting combined asphalt concrete straight core wall dam according to claim 1, wherein a wave wall is arranged on the top of the upstream rockfill area, and the bottom of the wave wall is embedded in the upstream rockfill area.
7. The roll compaction and placement combined asphalt concrete straight core wall dam according to claim 1, wherein an inverted filter layer is arranged between the downstream rockfill area and the drainage area.
8. The roller compacted and cast asphalt concrete straight core dam according to claim 1, wherein the thickness of the roller compacted asphalt concrete wall is equal to the thickness of the cast asphalt concrete wall.
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| CN202221517823.8U CN217710582U (en) | 2022-06-17 | 2022-06-17 | Rolling and pouring combined asphalt concrete straight core wall dam |
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| CN202221517823.8U CN217710582U (en) | 2022-06-17 | 2022-06-17 | Rolling and pouring combined asphalt concrete straight core wall dam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117286842A (en) * | 2023-09-27 | 2023-12-26 | 中国电建集团北京勘测设计研究院有限公司 | Asphalt concrete core wall dam |
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2022
- 2022-06-17 CN CN202221517823.8U patent/CN217710582U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117286842A (en) * | 2023-09-27 | 2023-12-26 | 中国电建集团北京勘测设计研究院有限公司 | Asphalt concrete core wall dam |
| CN117286842B (en) * | 2023-09-27 | 2024-05-07 | 中国电建集团北京勘测设计研究院有限公司 | Asphalt concrete core wall dam |
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