CN215977136U - Concrete panel rock-fill dam structure with foundation grouting gallery - Google Patents
Concrete panel rock-fill dam structure with foundation grouting gallery Download PDFInfo
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- CN215977136U CN215977136U CN202120362261.3U CN202120362261U CN215977136U CN 215977136 U CN215977136 U CN 215977136U CN 202120362261 U CN202120362261 U CN 202120362261U CN 215977136 U CN215977136 U CN 215977136U
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Abstract
The utility model relates to a concrete panel rock-fill dam structure with a foundation grouting gallery. The utility model aims to provide a concrete panel rock-fill dam structure with a foundation grouting gallery, so that the dam can be subjected to foundation curtain grouting reinforcement treatment under the condition of limited water level reduction even no operation water level reduction. The technical scheme of the utility model is as follows: the utility model provides a take concrete panel rock-fill dam structure of basic grout corridor which characterized in that: the toe board structure of the upstream surface of the concrete panel rock-fill dam is divided into a foundation grouting gallery structure body corresponding to a riverbed and a low-elevation area of two banks and an onshore toe board corresponding to a high-elevation area of the two banks; grouting galleries in the foundation grouting gallery structure body are communicated to the outside of a downstream dam body of the concrete panel rock-fill dam through traffic galleries at two banks. The utility model is suitable for earth and rockfill dam engineering.
Description
Technical Field
The utility model relates to a concrete panel rock-fill dam structure with a foundation grouting gallery. The method is suitable for earth and rockfill dam engineering.
Background
The concrete panel rock-fill dam can fully utilize the excavated materials of the building, is one of economic and green dam types, and is widely applied to the construction of water and electricity hydraulic engineering in China. The concrete face rockfill dam body adopts a concrete face to prevent seepage, the foundation adopts curtain grouting or a seepage-proof wall to prevent seepage, and the foundation prevents seepage and the dam body from seepage and is connected through toe boards.
Since the toe board is exposed in the upstream vault, toe board foundation treatments, including consolidation grouting and drapery grouting, need to be performed prior to impoundment; if the foundation needs to be reinforced and grouted after the reservoir stores water, the reservoir water must be emptied, and toe boards in the treated area are exposed out of the water. For the reservoir in the operation period, the normal operation of the reservoir is adversely affected, particularly the elevation of a treatment part is low, and the problem that the existing emptying facility of the reservoir cannot meet the requirement of controlling the overhaul water level also exists.
The foundation grouting belongs to concealed engineering, the construction quality control difficulty is high, the defect possibility is high, the normal service life of curtain grouting is generally shorter than the design life of a dam, and even if the curtain grouting with good construction quality is carried out, the foundation seepage-proofing reinforcement is carried out in the later stage. The existing concrete panel rock-fill dam has a certain contradiction between the basic seepage-proofing reinforcement treatment and the continuous normal operation of a reservoir.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: aiming at the existing problems, the concrete panel rock-fill dam structure with the foundation grouting gallery is provided, so that the dam can be subjected to foundation curtain grouting reinforcement treatment under the condition of limited water level reduction or even no operation water level reduction.
The technical scheme adopted by the utility model is as follows: the utility model provides a take concrete panel rock-fill dam structure of basic grout corridor which characterized in that: the toe board structure of the upstream surface of the concrete panel rock-fill dam is divided into a foundation grouting gallery structure body corresponding to a riverbed and a low-elevation area of two banks and an onshore toe board corresponding to a high-elevation area of the two banks;
grouting galleries in the foundation grouting gallery structure body are communicated to the outside of a downstream dam body of the concrete panel rock-fill dam through traffic galleries at two banks.
A water stopping structure I is arranged at the position corresponding to the structural joint I of the foundation grouting gallery structure; and a structural joint II is arranged between the foundation grouting gallery structure body and the shore toe board, and a water stopping structure II is arranged corresponding to the structural joint II.
The water stopping structure I comprises a copper sheet water stopping I and a surface bulge type water stopping I;
the copper sheet water stop I is positioned in the foundation grouting gallery structure body and on the upstream side of the grouting gallery, one end of the copper sheet water stop I is connected with a bottom copper sheet water stop of a peripheral seam on the upstream surface of the concrete panel rock-fill dam, and the other end of the copper sheet water stop I extends into a bottom anchoring groove below the foundation grouting gallery structure body and is anchored;
the surface bulge type water stopping I is arranged along the top structural joint I of the foundation grouting gallery structure in a cross-joint covering mode, one end of the surface bulge type water stopping I is connected with the surface bulge type water stopping on the peripheral joints into a whole, and the other end of the surface bulge type water stopping I extends into a rock anchoring groove on the rock mass on the upstream side of the foundation grouting gallery structure.
The water stopping structure II comprises a copper sheet water stopping structure II and a surface bulge type water stopping structure II;
the copper sheet water stop II is arranged across a structural joint II, two sides of the copper sheet water stop II are respectively connected with the foundation grouting gallery structure body and the shore toe board, one end of the copper sheet water stop II is connected with a bottom copper sheet water stop of a peripheral joint on the upstream surface of the concrete panel rock-fill dam, and the other end of the copper sheet water stop II is anchored in a toe board lower anchoring groove below the shore toe board;
and the surface bulge type water stop II is arranged along the top of the structural joint II between the foundation grouting gallery and the shore toe board in a spanning manner, one end of the surface bulge type water stop II is connected with the surface bulge type water stop of the peripheral joint into a whole, and the other end of the surface bulge type water stop II extends into the foundation anchoring groove at the upper end of the structural joint II and the top of the foundation grouting gallery structure.
And the toe board foundation below the shore toe board is provided with foundation anchor bars, consolidation grouting and curtain grouting.
And the foundation below the foundation grouting gallery structure body is provided with consolidation grouting and curtain grouting.
And cushion materials are arranged in the dam body of the concrete panel rock-fill dam on the downstream side of the peripheral seams.
The two sides of the bottom plate of the grouting gallery in the foundation grouting gallery structure are provided with drainage ditches, and the part of the grouting gallery corresponding to the bank slope is provided with a pedestrian step.
The traffic corridor adopts the concrete corridor structure of burying concrete panel rock-fill dam body, and concrete corridor structure basis is located on the natural basis after the excavation, is equipped with the transition material district that is not less than 1m thick between the dam body and the concrete corridor structure outside.
The construction method of the concrete panel rock-fill dam structure with the foundation grouting gallery is characterized by comprising the following steps of:
determining the arrangement elevation of the foundation grouting gallery structure, wherein the elevation is a water level operation sensitive water level or a designed emptying facility limiting water level, the foundation seepage-proofing reinforcement treatment above the elevation is carried out by reducing the operation water level, and the foundation seepage-proofing reinforcement treatment below the elevation is carried out under the water level;
performing dam foundation excavation, excavation of shore toe boards and foundation grouting gallery structure foundations and excavation of two-shore traffic gallery foundations, wherein the foundation grouting gallery structure foundations are formed by groove excavation according to body types of the foundation grouting gallery structure foundations, and bottom anchoring grooves are excavated in the positions corresponding to the structural joint I of the foundation grouting gallery structure;
pouring a foundation grouting gallery structure body, wherein the foundation grouting gallery structure body comprises a copper sheet water stop I pre-buried in the foundation grouting gallery structure body, a water collecting well is arranged at the lowest elevation position of a bottom plate of a river bed part, and water stop copper sheets II connected with shore toe boards are pre-buried at the end parts of two sides of the foundation grouting gallery structure body;
pouring a concrete gallery structure of the two-bank traffic gallery;
performing consolidation grouting and curtain grouting construction on the foundation of the foundation grouting gallery structure according to the sequence of consolidation and curtain grouting;
drilling holes in the range of the shore toe board foundation to install foundation anchor bars;
pouring a shore toe board;
performing consolidation grouting and curtain grouting construction on the shore toe board foundation according to the sequence of consolidation and curtain grouting;
and constructing the part above the ground according to the construction process requirement of the concrete panel rock-fill dam.
The utility model has the beneficial effects that: the foundation grouting gallery structure is adopted as a part of the toe board structure at the bottom of the concrete panel rock-fill dam panel, the grouting gallery in the foundation grouting gallery structure is communicated with the downstream outside of the dam body through the traffic galleries at two banks, and the concrete panel rock-fill dam consolidation grouting and the curtain grouting have construction conditions after water storage, so that the operation flexibility of the concrete panel rock-fill dam is further improved, the operation benefit of a reservoir is improved, and the operation and maintenance cost of the reservoir is reduced.
Drawings
Fig. 1 is a schematic plan view of the embodiment.
FIG. 2 is a typical structure diagram of the dam body at the shore toe board position in the embodiment.
FIG. 3 is a typical structure diagram of a dam at the structural body part of the foundation grouting gallery in the embodiment.
Fig. 4 is a schematic sectional view of a water stopping structure i in the embodiment.
Fig. 5 is a schematic sectional view (vertical grouting gallery direction) of the water stopping structure ii in the embodiment.
Fig. 6 is a schematic sectional view (vertical traffic corridor direction) of the water stopping structure ii in the embodiment.
Fig. 7 is a typical structure diagram of a traffic corridor in the embodiment.
1. A reservoir bank; 2. a riverbed; 3. concrete face rockfill dams; 4. a concrete panel; 5. a foundation grouting gallery structure; 6. a shore toe board; 7. a concrete gallery structure; 8. a wave wall; 9. peripheral seams; 10. stopping water at the top; 11. foundation anchor bars; 12. consolidation grouting; 13. grouting a curtain; 14. special bedding materials; 16. Stopping water for the copper sheet I; 17. a bottom anchoring groove; 18. surface bulge type water stopping I; 19. a rock anchoring groove; 20. Stopping water from the copper sheet II; 21. a toe plate lower anchoring groove; 22. surface bulge type water stopping II; 23. a foundation anchoring groove; 24. a transition material area.
Detailed Description
As shown in fig. 1 to 3, the present embodiment is a concrete-faced rockfill dam structure with a foundation grouting gallery, wherein the concrete-faced rockfill dam is constructed across a river and is located on a river bed and a bank, the upstream of the concrete-faced rockfill dam is impervious by using a concrete face, and a toe board structure at the bottom of the upstream of the concrete-faced rockfill dam is divided into a foundation grouting gallery structure body arranged in a low-elevation area corresponding to the river bed and two banks and an on-bank toe board arranged in a high-elevation area corresponding to the two banks, wherein the grouting gallery in the foundation grouting gallery structure body is communicated to the outside of the downstream dam body of the concrete-faced rockfill dam through a traffic gallery at the two banks.
In this example, a horizontal joint and a top water stop are provided between the top of the concrete panel and the wave wall on the top of the concrete panel rock-fill dam, and a peripheral joint and a water stop are provided between the bottom of the concrete panel and the foundation grouting gallery structure and the shore toe board.
As shown in fig. 4, the structural joint i of the foundation grouting gallery structure in the present embodiment is provided with a water stopping structure i, and the water stopping structure i includes a copper sheet water stopping structure i embedded in concrete and a surface bulge type water stopping structure i formed by filling plastic filler.
In the embodiment, a copper sheet water stop I is buried in a foundation grouting gallery structure body and is positioned on the upstream side of the grouting gallery, one end of the copper sheet water stop I is connected with a bottom copper sheet water stop of a peripheral seam by adopting a T-shaped joint, and the other end of the copper sheet water stop I extends into a bottom anchoring groove below the foundation grouting gallery structure body and is anchored by adopting pouring expansion concrete; the surface bulge type water stop I is arranged along the top structural joint I of the foundation grouting gallery structure in a cross-joint covering mode, one end of the surface bulge type water stop I is connected with the surface bulge type water stop on the peripheral joints into a whole, and the other end of the surface bulge type water stop I extends into a rock anchoring groove on the rock mass on the upstream side of the foundation grouting gallery structure.
As shown in figures 5-6, in the embodiment, a structural joint II is arranged between the foundation grouting gallery structure body and the shore toe board, a water stopping structure II is arranged corresponding to the structural joint, and the water stopping structure II comprises a copper sheet water stopping II and a surface bulge type water stopping II.
In the embodiment, a copper sheet water stop II is arranged across a structural joint II, two sides of the copper sheet water stop II are respectively connected with a foundation grouting gallery structure body and a shore toe board, one end of the copper sheet water stop II is connected with a bottom copper sheet water stop of a peripheral joint on the upstream surface of the concrete panel rock-fill dam by adopting a T-shaped joint, and the other end of the copper sheet water stop II is anchored in a toe board lower anchoring groove below the shore toe board; and the surface bulge type water stop II is arranged along the top of the structural joint II between the foundation grouting gallery and the shore toe board in a joint-spanning covering manner, one end of the surface bulge type water stop II is connected with the surface bulge type water stop of the peripheral joint into a whole, and the other end of the surface bulge type water stop II extends into a foundation anchoring groove at the upstream end of the structural joint and the top of the foundation grouting gallery structure.
In the embodiment, foundation anchor bars, consolidation grouting and curtain grouting are arranged on toe board foundations below the shore toe boards; and the foundation below the foundation grouting gallery structure body is provided with consolidation grouting and curtain grouting.
As shown in FIG. 7, the traffic corridor in this example is a concrete corridor structure embedded in the dam body of the concrete panel rock-fill dam, the foundation of the concrete corridor structure is located on the excavated natural foundation, and a transition material area with a thickness of not less than 1m is arranged between the outer part of the concrete corridor structure and the dam body. In this example, the concrete face rockfill dam body is provided with (special) cushion materials at the downstream side of the peripheral gap.
The bottom plate both sides of the interior grout corridor of basic grout corridor structure body in this embodiment are equipped with the escape canal, and the portion that the grout corridor corresponds the bank slope is equipped with the pedestrian's step.
The specific construction method of the embodiment is as follows:
determining the arrangement elevation of the foundation grouting gallery structure according to the reservoir operation requirement, the topographic and geological conditions and investment analysis; the elevation is typically a water level sensitive to operation or a limit level of an existing flare. The foundation seepage-proofing reinforcing treatment above the elevation is carried out by reducing the operating water level, and the foundation seepage-proofing reinforcing treatment below the elevation can be carried out under the water level.
And (3) performing dam foundation excavation, shore toe board and foundation grouting gallery structure foundation excavation and traffic gallery foundation excavation according to the design requirements of the concrete panel rock-fill dam, wherein the foundation grouting gallery structure is formed by groove excavation according to the body type of the foundation grouting gallery structure, and expanding and excavating anchoring grooves in the structural joint I part of the foundation grouting gallery structure.
Pouring a foundation grouting gallery structure body of a river bed and two banks, wherein copper sheet water stopping I is pre-buried in concrete of the gallery structure body corresponding to a structural joint I; and a water collecting well is arranged at the lowest elevation position of the bottom plate at the river bed part, and water stopping copper sheets II connected with shore toe boards are embedded in the end parts of the two sides of the foundation grouting gallery structure body.
And pouring a concrete gallery structure of the traffic galleries on both sides. The method comprises the following steps of firstly pouring an upstream part intersected with a foundation grouting gallery structure body, wherein traffic galleries in the concrete panel rock-fill dam body can be arranged according to the dam body construction time sequence.
And performing consolidation grouting and curtain grouting construction on the foundation of the foundation grouting gallery structure body according to the sequence of consolidation and curtain grouting.
And drilling holes in the range of the shore toe board foundation to install foundation anchor bars.
And pouring the shore toe board, wherein the shore toe board comprises a pre-embedded copper sheet water stop in a structural seam of the toe board.
And performing shore toe board foundation consolidation grouting and curtain grouting construction according to the sequence of consolidation and curtain grouting. The construction method comprises the following steps of constructing the parts above the ground according to the construction process requirements of the concrete panel rock-fill dam, and comprising peripheral joint downstream special bedding materials, dam body filling, concrete panels, wave walls, surface water stopping structures, downstream dam face protection and the like.
Claims (9)
1. The utility model provides a take concrete panel rock-fill dam structure of basic grout corridor which characterized in that: the toe board structure of the upstream surface of the concrete panel rock-fill dam is divided into a foundation grouting gallery structure body corresponding to a riverbed and a low-elevation area of two banks and an onshore toe board corresponding to a high-elevation area of the two banks;
grouting galleries in the foundation grouting gallery structure body are communicated to the outside of a downstream dam body of the concrete panel rock-fill dam through traffic galleries at two banks.
2. The concrete panel rock-fill dam structure with a foundation grouting gallery of claim 1, wherein: a water stopping structure I is arranged at the position corresponding to the structural joint I of the foundation grouting gallery structure; and a structural joint II is arranged between the foundation grouting gallery structure body and the shore toe board, and a water stopping structure II is arranged corresponding to the structural joint II.
3. The concrete panel rock-fill dam structure with a foundation grouting gallery of claim 2, wherein: the water stopping structure I comprises a copper sheet water stopping I and a surface bulge type water stopping I;
the copper sheet water stop I is positioned in the foundation grouting gallery structure body and on the upstream side of the grouting gallery, one end of the copper sheet water stop I is connected with a bottom copper sheet water stop of a peripheral seam on the upstream surface of the concrete panel rock-fill dam, and the other end of the copper sheet water stop I extends into a bottom anchoring groove below the foundation grouting gallery structure body and is anchored;
the surface bulge type water stopping I is arranged along the top structural joint I of the foundation grouting gallery structure in a cross-joint covering mode, one end of the surface bulge type water stopping I is connected with the surface bulge type water stopping on the peripheral joints into a whole, and the other end of the surface bulge type water stopping I extends into a rock anchoring groove on the rock mass on the upstream side of the foundation grouting gallery structure.
4. The concrete panel rock-fill dam structure with a foundation grouting gallery of claim 2, wherein: the water stopping structure II comprises a copper sheet water stopping structure II and a surface bulge type water stopping structure II;
the copper sheet water stop II is arranged across a structural joint II, two sides of the copper sheet water stop II are respectively connected with the foundation grouting gallery structure body and the shore toe board, one end of the copper sheet water stop II is connected with a bottom copper sheet water stop of a peripheral joint on the upstream surface of the concrete panel rock-fill dam, and the other end of the copper sheet water stop II is anchored in a toe board lower anchoring groove below the shore toe board;
and the surface bulge type water stop II is arranged along the top of the structural joint II between the foundation grouting gallery and the shore toe board in a spanning manner, one end of the surface bulge type water stop II is connected with the surface bulge type water stop of the peripheral joint into a whole, and the other end of the surface bulge type water stop II extends into the foundation anchoring groove at the upper end of the structural joint II and the top of the foundation grouting gallery structure.
5. The concrete panel rock-fill dam structure with a foundation grouting gallery of claim 1, wherein: and the toe board foundation below the shore toe board is provided with foundation anchor bars, consolidation grouting and curtain grouting.
6. The concrete panel rock-fill dam structure with a foundation grouting gallery of claim 1, wherein: and the foundation below the foundation grouting gallery structure body is provided with consolidation grouting and curtain grouting.
7. The concrete panel rock-fill dam structure with a foundation grouting gallery of claim 3, wherein: and cushion materials are arranged in the dam body of the concrete panel rock-fill dam on the downstream side of the peripheral seams.
8. The concrete panel rock-fill dam structure with a foundation grouting gallery of claim 1, wherein: the two sides of the bottom plate of the grouting gallery in the foundation grouting gallery structure are provided with drainage ditches, and the part of the grouting gallery corresponding to the bank slope is provided with a pedestrian step.
9. The concrete panel rock-fill dam structure with a foundation grouting gallery of claim 1, wherein: the traffic corridor adopts the concrete corridor structure of burying concrete panel rock-fill dam body, and concrete corridor structure basis is located on the natural basis after the excavation, is equipped with the transition material district that is not less than 1m thick between the dam body and the concrete corridor structure outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120362261.3U CN215977136U (en) | 2021-02-08 | 2021-02-08 | Concrete panel rock-fill dam structure with foundation grouting gallery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120362261.3U CN215977136U (en) | 2021-02-08 | 2021-02-08 | Concrete panel rock-fill dam structure with foundation grouting gallery |
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| Publication Number | Publication Date |
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| CN215977136U true CN215977136U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120362261.3U Active CN215977136U (en) | 2021-02-08 | 2021-02-08 | Concrete panel rock-fill dam structure with foundation grouting gallery |
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| CN (1) | CN215977136U (en) |
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2021
- 2021-02-08 CN CN202120362261.3U patent/CN215977136U/en active Active
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