CN210288287U - Dam toe transition structure suitable for arch dam on complicated rock stratum - Google Patents
Dam toe transition structure suitable for arch dam on complicated rock stratum Download PDFInfo
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- CN210288287U CN210288287U CN201920916457.5U CN201920916457U CN210288287U CN 210288287 U CN210288287 U CN 210288287U CN 201920916457 U CN201920916457 U CN 201920916457U CN 210288287 U CN210288287 U CN 210288287U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model provides a dam toe transition structure suitable for arch dam on complicated rock stratum. The dam toe transition structure is arranged between a downstream dam toe of the arch dam and the apron and comprises a multi-circle-center foundation and a dam toe transition block, the multi-circle-center foundation is arranged along the downstream dam toe of the arch dam, and the dam toe transition block is arranged between the multi-circle-center foundation and the downstream apron; the multi-circle-center foundation comprises an inclined part and a horizontal part, the surface of the inclined part is smoothly and tightly connected with the downstream surface of the arch dam, and the surface of the inclined part is provided with a multi-circle-center arc combined structure. The multi-circle center foundation can be smoothly and tightly combined with the arch dam, the thrust of the arch dam can be well and fully diffused into the basement bedrock of the dam foundation, and the stress distribution of the arch dam foundation is improved; the toe transition block can reduce the stress gradient between the arch dam and the downstream apron, homogenize the stress transfer in the bedrock and coordinate the deformation between the arch dam and the downstream apron.
Description
Technical Field
The utility model relates to the technical field of hydraulic engineering, in particular to a toe transition structure suitable for an arch dam multi-circle center foundation on a complex rock stratum and a dam toe transition structure between the arch dam multi-circle center foundation and a downstream apron,
background
With the rapid development of global clean energy, hydroelectric power generation projects are continuously promoted, arch dams are used as the most economic dam types and are suitable for being built in high mountain canyon regions, and due to the fact that geological conditions of dam site regions are complex, soft rock strata such as columnar jointing basalt, breccia lava, sandstone, slate and the like are required to be utilized. In order to improve the deformation resistance of the complex rock stratum foundation, a large amount of basic treatment work is required, and the engineering investment, the construction period and the like are greatly influenced. Meanwhile, the stress difference between the arch dam and the downstream flat-protecting foundation is large, so that the foundation is not uniformly deformed, and the concrete at the part is cracked. In order to solve the problem, the utility model provides an economic rationality, the feasible structure of technique to improve arch dam foundation stress distribution, reduce the stress gradient between arch dam and low reaches armoring, coordinate the deformation between arch dam and the low reaches armoring, reach the purpose of make full use of complicated stratum foundation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a dam toe transition structure who is applicable to the complicated rock stratum ground of arch dam among the prior art to the above-mentioned problem of complicated rock stratum ground of arch dam. The structure consists of a multi-circle-center foundation and a toe transition block which are arranged at the toe part of the arch dam, wherein the multi-circle-center foundation can be smoothly and tightly combined with the arch dam, the thrust of the arch dam can be well and fully diffused into the basement rock of the dam foundation, and the stress distribution of the arch dam foundation is improved; the toe transition block can reduce the stress gradient between the arch dam and the downstream apron, homogenize the stress transfer in the bedrock, coordinate the deformation between the arch dam and the downstream apron, and meanwhile, an anchoring system can be arranged on the toe transition block to improve the initial stress level of the dam foundation rock mass and the deformation modulus of the dam foundation rock mass.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a dam toe transition structure suitable for arch dam on complicated rock stratum, dam toe transition structure sets up between arch dam low reaches dam toe and fender flat, including many centre of a circle basis and dam toe transition piece, many centre of a circle basis sets up along the low reaches dam toe of arch dam, dam toe transition piece sets up between many centre of a circle basis and low reaches fender flat; the multi-circle-center foundation comprises an inclined part and a horizontal part, the surface of the inclined part is smoothly and tightly connected with the downstream surface of the arch dam, and the surface of the inclined part is provided with a multi-circle-center arc combination surface.
Preferably, the multi-circle-center arc combined surface is formed by combining multiple layers of multi-circle-center control lines and is smoothly and tightly connected with the downstream surface of the arch dam.
Preferably, the height difference of the multi-circle center control line is consistent with the concrete pouring layering.
Preferably, the multi-circle center foundation and the arch dam are integrally cast.
Preferably, the top surface of the horizontal part is of a step structure, the step structure is gradually lifted along with the arch dam foundation towards the bank slope, and the top surface of each step in the step structure is a horizontal plane.
Preferably, the height difference of the adjacent steps is consistent with the concrete pouring layering.
Preferably, a step ladder is arranged between adjacent steps.
Preferably, an anchoring system is arranged on the dam toe transition block and comprises a plurality of prestressed anchor cables, the top ends of the prestressed anchor cables are arranged on the top surface of the dam toe transition block, anchoring sections are arranged at the bottom ends of the prestressed anchor cables, and the anchoring sections are deep into the bottom stable rock stratum.
Preferably, a structural joint is arranged between the multi-circle-center foundation and the dam toe transition block, and a water stop is arranged in the structural joint.
The utility model discloses a beneficial effect is:
the multi-circle center foundation can be smoothly and tightly combined with the arch dam, the thrust of the arch dam can be well and fully diffused into the basement rock of the dam foundation, and the stress distribution of the arch dam foundation is improved; the toe transition block can reduce the stress gradient between the arch dam and the downstream apron, homogenize the stress transfer in the bedrock, coordinate the deformation between the arch dam and the downstream apron, and meanwhile, an anchoring system can be arranged on the toe transition block, so that the initial stress level of the rock mass of the dam foundation can be improved, and the deformation modulus of the rock mass of the dam foundation can be improved.
Aiming at the complex rock stratum foundation of the arch dam, the foundation stress can be effectively improved through the structure, the deformation between the arch dam and the downstream apron is coordinated, the soft rock foundation is fully utilized, and a large amount of foundation treatment work is reduced. The structure has the advantages of convenient construction, shortened construction period, saved investment and higher economic benefit, is an economic and reasonable structure form with feasible technology, and is suitable for various arch dam forms.
Drawings
Fig. 1 is a schematic structural diagram of a toe transition structure of an arch dam applicable to a complex rock stratum of the present invention.
Fig. 2 is a plane layout diagram of a toe transition structure of an arch dam applicable to a complex rock stratum of the present invention.
Fig. 3 is a cross-sectional view of a toe transition structure of an arch dam applied to a complex rock stratum of the present invention.
Fig. 4 is a tangent view of a toe transition structure of an arch dam applied to a complex rock stratum of the present invention.
In the figure: 1. an arch dam; 101. a downstream dam face; 102. an upstream dam face; 2. a complex rock formation; 3. a multi-circle center foundation; 301. an inclined portion; 302. a horizontal portion; 4. a dam toe transition block; 5. protecting the flat; 6. structural sewing; 7. a pre-stressed anchor cable; 8. an anchoring section; 9. step ladder.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, fig. 2, fig. 3, and fig. 4, the utility model discloses a toe transition structure suitable for arch dam on complex rock stratum 2, toe transition structure sets up on the basement rock face of the regional complex rock stratum 2 between 1 low reaches dam face 101 of arch dam and the apron 5, including many centre of a circle basis 3 and toe transition piece 4, many centre of a circle basis 3 sets up along the low reaches dam face 101 of arch dam 1, toe transition piece 4 sets up between many centre of a circle basis 3 and toe; the multi-circle-center foundation 3 comprises an inclined part 301 and a horizontal part 302, the surface of the inclined part 301 is smoothly and tightly connected with the downstream surface of the arch dam 1, and a multi-circle-center arc combination surface is arranged on the surface of the inclined part 301.
The surface of the multi-circle-center arc combined surface is provided with a plurality of multi-circle-center control lines, the multi-circle-center control lines are arc control lines arranged towards the downstream direction of the arch dam 1, and the multi-circle-center control lines extend horizontally. The multi-center circular foundation structure and the dam are integrally cast and provided with transverse seams, so that the multi-center arc combined surface is smoothly and tightly connected with the downstream surface of the arch dam, and the height difference of the multi-center control line is consistent with the concrete casting layering of the multi-center circular foundation. And integrally pouring the multi-circle-center foundation 3 and the arch dam 1.
The top surface of horizontal part 302 is the stair structure, the stair structure is along with arch dam 1 basis is ascending gradually to bank slope direction, the top surface of every step is the horizontal plane in the stair structure. The height difference of the adjacent steps is consistent with the concrete pouring layering. A step ladder 9 is arranged between the adjacent steps.
An anchoring system is arranged on the dam toe transition block 4 and comprises a plurality of prestressed anchor cables 7 and anchoring sections 8, the top ends of the prestressed anchor cables 7 are arranged on the top surface of the dam toe transition block 4, the bottom ends of the prestressed anchor cables 7 are provided with the anchoring sections 8, and the anchoring sections 8 are inserted into the complex rock stratum 2.
And a structural joint 6 is arranged between the multi-circle-center foundation 3 and the dam toe transition block 4, and a water stop is arranged in the structural joint 6.
The embodiment of the utility model provides a pair of be applicable to complicated stratum 2 and go up the stress diffusion scope in the dam toe transition structure multiplicable dam foundation bedrock of arch dam 1, improve arch dam 1 foundation stress distribution, reduce the stress gradient between arch dam 1 and low reaches are protected flat 5, and the stress transmission in the homogenization bedrock coordinates the deformation between arch dam 1 and low reaches are protected flat 5.
The multi-circle center foundation 3 can be smoothly and tightly combined with the arch dam 1, the thrust of the arch dam 1 can be well and fully diffused into the basement rock of the dam foundation, and the stress distribution of the foundation of the arch dam 1 is improved; the toe transition block 4 can reduce the stress gradient between the arch dam 1 and the downstream apron 5, homogenize the stress transfer in the bedrock and coordinate the deformation between the arch dam 1 and the downstream apron 5. Meanwhile, an anchoring system is arranged through the dam toe transition block 4, so that the initial stress level of the dam foundation rock mass is improved, and the deformation modulus of the dam foundation rock mass is improved. By the measures, the aim of building the arch dam 1 at the weak dam foundation can be achieved, and meanwhile, the risk of concrete cracking caused by uneven deformation of the joint position of the arch dam 1 and the downstream apron 5 is reduced.
Aiming at the complex rock stratum 2 foundation of the arch dam 1, the technical scheme can effectively improve the foundation stress, coordinate the deformation between the arch dam 1 and the downstream apron 5, fully utilize the soft rock foundation and reduce a large amount of foundation treatment work. The structure is convenient to construct, can shorten the construction period, saves the investment, has higher economic benefit, is an economic and reasonable structure form with feasible technology, and is suitable for various arch dams 1 forms.
Claims (9)
1. A toe transition structure suitable for an arch dam on a complex rock stratum is arranged between a downstream toe of the arch dam and a fender, and is characterized by comprising a multi-circle-center foundation and a toe transition block, wherein the multi-circle-center foundation is arranged along the downstream dam face of the arch dam, and the toe transition block is arranged between the multi-circle-center foundation and the downstream fender; the multi-circle-center foundation comprises an inclined part and a horizontal part, the surface of the inclined part is smoothly and tightly connected with the downstream surface of the arch dam, and the surface of the inclined part is a multi-circle-center arc combined surface.
2. The toe transition structure of an arch dam in a complex rock stratum as claimed in claim 1, wherein said multiple circular arc assembly surfaces are assembled by multiple circular control lines in each layer, and are smoothly and tightly connected with the downstream surface of the arch dam.
3. The toe transition structure of an arch dam for complex terrane as claimed in claim 2, wherein the elevation difference of said multiple circle center control line is consistent with concrete pouring layering.
4. The toe transition structure of an arch dam for complex rock formations as claimed in claim 1, wherein said multi-centre foundation and arch dam are integrally cast.
5. The toe transition structure of an arch dam for complex rock strata as claimed in claim 1, wherein the top surface of the horizontal portion is a step structure, the step structure gradually rises from the foundation of the arch dam to the bank slope, and the top surface of each step in the step structure is a horizontal surface.
6. The toe transition structure of an arch dam for complex terranes as claimed in claim 5, wherein the height difference of adjacent steps is consistent with the concrete pouring layering.
7. The toe transition structure of an arch dam for complex rock formations according to claim 5, wherein a step ladder is provided between adjacent steps.
8. The dam toe transition structure suitable for an arch dam on a complex rock stratum as claimed in claim 1, wherein an anchoring system is arranged on the dam toe transition block, the anchoring system comprises a plurality of prestressed anchor cables, the top ends of the prestressed anchor cables are arranged on the top surface of the dam toe transition block, the bottom ends of the prestressed anchor cables are provided with anchoring sections, and the anchoring sections are deep into the bottom stable rock stratum.
9. The toe transition structure suitable for an arch dam on a complex rock stratum as claimed in claim 1, wherein a structural seam is arranged between the multi-circle center foundation and the toe transition block, and a water stop is arranged in the structural seam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920916457.5U CN210288287U (en) | 2019-06-18 | 2019-06-18 | Dam toe transition structure suitable for arch dam on complicated rock stratum |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920916457.5U CN210288287U (en) | 2019-06-18 | 2019-06-18 | Dam toe transition structure suitable for arch dam on complicated rock stratum |
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| CN210288287U true CN210288287U (en) | 2020-04-10 |
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| CN201920916457.5U Active CN210288287U (en) | 2019-06-18 | 2019-06-18 | Dam toe transition structure suitable for arch dam on complicated rock stratum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344376A (en) * | 2019-06-18 | 2019-10-18 | 中国电建集团华东勘测设计研究院有限公司 | A kind of toe transition structure suitable for arch dam on complex formation |
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2019
- 2019-06-18 CN CN201920916457.5U patent/CN210288287U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344376A (en) * | 2019-06-18 | 2019-10-18 | 中国电建集团华东勘测设计研究院有限公司 | A kind of toe transition structure suitable for arch dam on complex formation |
| CN110344376B (en) * | 2019-06-18 | 2024-07-19 | 中国电建集团华东勘测设计研究院有限公司 | Dam toe transition structure suitable for arch dam on complex rock stratum |
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