CN101748708B - 4.5 or 4 meter high toe board structure of concrete-face rick-fill dam and construction method thereof - Google Patents
4.5 or 4 meter high toe board structure of concrete-face rick-fill dam and construction method thereof Download PDFInfo
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- CN101748708B CN101748708B CN2009102621941A CN200910262194A CN101748708B CN 101748708 B CN101748708 B CN 101748708B CN 2009102621941 A CN2009102621941 A CN 2009102621941A CN 200910262194 A CN200910262194 A CN 200910262194A CN 101748708 B CN101748708 B CN 101748708B
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Abstract
The invention relates to a 4.5 or 4 meter high toe board structure of a concrete facing rick-fill dam and a construction method thereof and provides a 4.5 or 4 meter high toe board structure of a concrete-face rick-fill dam and a construction method thereof, which have simple structure, convenient construction and short construction period, in order to design toe boards according to the terrain and geological conditions of a construction site so as to reduce construction risks, lower the construction instrument and widen the adaptability conditions of the concrete-face rick-fill dam under different terrain and geological conditions. The 4.5 or 4 meter high toe board structure of the concrete-face rick-fill dam comprises a toe board and a built-in toe board which is arranged at a downstream end and the toe board and the built-in toe board are connected by a water stop. The structure is characterized in that the toe board is 4.5 m or 4 m wide and 50-120 cm thick, the upper side and the downstream side of the built-in toe board are connected with a stockpile by a filter material in a transition way. The invention is applied to a reinforced concrete facing rick-fill dam construction which can not carry out wide toe plate type layout under special terrain and geological conditions.
Description
Technical field
The present invention relates to a kind of 4.5 or 4m type high concrete panel loose rock dam toe board structure and job practices thereof.Mainly be applicable to extreme terrain, geological conditions, can't carry out the reinforced concrete face rockfill dam engineering that wide toe board type is arranged.
Background technology
When barrage adopts the high concrete panel loose rock dam; If orographic condition allows, the toe board width is definite according to allowing hydraulic gradient, but meets the extreme terrain condition; The two sides side slope is high steep; Arrange that by the hydraulic gradient width that calculates toe board will cause high slope and a large amount of Slope Treatment expenses, and increased engineering quantity, prolonged the engineering construction cycle.
Summary of the invention
The technical problem that the present invention will solve is: 4.5 or 4m type high concrete panel loose rock dam toe board structure and job practices thereof that a kind of simple in structure, easy construction, short construction period are provided to the problem of above-mentioned existence; Carry out toe board design according to site contour, geological conditions with being intended to suit measures to local conditions, thereby reduce engineering risk, practice thrift construction investment, widen the condition of compatibility of rock on the different terrain geological conditions.
The technical scheme that the present invention adopted is: 4.5 or 4m type high concrete panel loose rock dam toe board structure; Have toe board and the built-in toe board that is located at its downstream; Connect through sealing between the two; It is characterized in that: said toe board width is 4.5m or 4m, and thickness is 50-120cm, is connected with main windrow transition through filter material with downstream face above the built-in toe board.
Bank slope is built the thick external toe board of 30-50cm along the toe board outside, and its vertical parting is identical with toe board; If external toe board position rock mass geology condition is better, then can change the thick external toe board of bank slope spray 15-25cm into along the toe board outside.
The thickness of said built-in toe board is 15-25cm.
Said filter material comprises being laid on respectively above the built-in toe board expects and bedding material with the sub-district of downstream face, and the transition material between bedding material and main windrow.
A kind of 4.5 or the job practices of 4m type high concrete panel loose rock dam toe board structure, it is characterized in that may further comprise the steps:
A, excavation plinth foundation and built-in plinth foundation when wherein excavating built-in plinth foundation, only need be excavated to solid rock, and sled removes the loosening sillar in surface and gets final product;
B, drill holes dowel, treat that slip casting is condensed in the hole after, build toe board that width be 4.5m or 4m from low toward height along plinth foundation, on built-in plinth foundation, establish built-in toe board simultaneously, and between toe board and built-in toe board, establish sealing;
C, treat that toe board and built-in toe board condense after, carry out consolidation grouting and curtain grouting respectively according to sequencing;
D, heap are filled out filter material and main windrow.
After accomplishing above-mentioned steps d, bank slope is established external toe board along the toe board outside, and its vertical parting is identical with toe board, and its width is provided with according to the structure situation of side slope exposure.
The invention has the beneficial effects as follows: the toe board width is 4.5m or 4m among the present invention, and its downstream connects built-in toe board through sealing, and build on the littoral slope of external toe board; Can under extreme terrain conditions such as high gradient slope, reduce excavation; Stable problems such as generous amount excavation of avoiding causing and high slope because of wide toe board, thus the Slope Treatment expense reduced, shortened the construction period; Saved construction investment, for the benefit of generating performance in advance creates conditions.
Description of drawings
Fig. 1 is a sectional drawing of the present invention.
The specific embodiment
As shown in Figure 1; Present embodiment has toe board 1 and the built-in toe board 2 that is located at its downstream, connects through sealing 7 between the two, and its said toe board 1 width is 4.5m or 4m; Thickness adopts different-thickness according to head according to the elevation segmentation; Its span is 50-120cm, and consolidation grouting and curtain grouting are established in the basis, is connected with main windrow 12 transition through filter material with downstream face above the built-in toe board 2.Built-in toe board 2 adopts and hangs the construction of net pneumatically placed concrete form in this example; Thickness is 20cm; The hydraulic gradient that width allows according to the basement rock ground is calculated and is confirmed; Under the situation that execution conditions allow (such as the engineering time well-to-do) can select to adopt the concreting form built-in toe board 2 of constructing, its thickness is 25cm, establishes consolidation grouting in the certain width of basic adjacent toe board 1.
In order to reach better anti-seepage effect, can also build the thick external toe board 3 of 40cm along toe board 1 outside bank slope, wide structure by the side slope exposure according to circumstances is provided with, and its vertical parting is identical with toe board 1, and consolidation grouting is established on the basis; If external toe board 3 position rock mass geology conditions are better, then can change thick external toe board 3 into along toe board 1 outside bank slope spray 20cm.At this moment, when calculating the width of built-in toe board 2, need toe board 1 and external toe board 3 length all be taken into account.
Said filter material comprises the sub-districts material 9 and bedding material 10 that is laid on respectively above the built-in toe board 2 with downstream face, and the transition material 11 between bedding material 10 and main windrow 12.
The job practices of present embodiment is following:
A, confirm two sides toe board 1 position according to geological prospecting; It is seated on the better basement rock, and excavation toe board 1 basis and built-in toe board 2 bases are when wherein excavating built-in toe board 2 bases; Only need be excavated to solid rock, and sled except that cleaning up, the loosening sillar in surface gets final product.
B, drill holes dowel 6; After treating that slip casting is condensed in the hole, build the toe board 1 that width is 4.5m or 4m from low toward height, make one deck two-way concrete slab and dowel 6 binds in the middle of the toe board 1 along toe board 1 basis; The thickness of toe board 1 is pressed the elevation segmentation according to head and is adopted different thickness; For highly being the dam body about 150m, its thickness span is 50-120cm, and vertically parting is provided with according to the actual conditions needs; Tie up extension net muscle at the dowel 6 exposure ends that are positioned on built-in toe board 2 bases simultaneously; And with dowel 6 band elbows and net muscle bind; Spray the thick concrete of 20cm then and form built-in toe board 2, the hydraulic gradient that its width allows according to the basement rock ground is calculated and is confirmed, contains the length (toe board outside bank slope is provided with under the situation of external toe board) of toe board 1 and external toe board 3 during calculating; Built-in toe board 2 is parting not, and between toe board 1 and built-in toe board 2, establishes PVC sealing 7.
C, treat that toe board 1 and built-in toe board 2 condense after, in the certain width of toe board 1 basis and built-in toe board 2 basic adjacent toe boards 1, carry out consolidation grouting, then curtain grouting is carried out on toe board 1 basis; In the practical operation, also can carry out consolidation grouting to toe board 1 basis separately earlier, built-in toe board 2 is set then, treat that it condenses after, consolidation grouting is carried out on built-in toe board 2 bases, at last curtain grouting is carried out on toe board 1 basis.
D, carry out the construction of the bedding material 10 of sub-district, top material 9 and downstream face, lay transition material 11 and main windrow 12 constructions simultaneously, treat to carry out behind the settlement stability construction of panel 8, and periphery seam sealing is set at panel 8 and toe board 1 joint.
E, establish the identical external toe board 3 of vertical parting and toe board 1 along toe board 1 outside bank slope; Its setting can be selected the construction period according to schedule requirement, arranges dowel 6 before the construction earlier, builds the thick external toe board 3 of 40cm then; One deck between making wherein is in length and breadth to reinforcing bar and dowel 6 binds; Width according to circumstances is provided with by the structure of side slope exposure, treat that it condenses after, carry out consolidation grouting.If external toe board 3 position rock mass geology conditions are better, then can change thick concrete into along toe board 1 outside bank slope spray 20cm.
Claims (7)
1. one kind 4.5 or 4m type high concrete panel loose rock dam toe board structure; Have toe board (1) and be located at the built-in toe board (2) of its downstream; Connect through sealing (7) between the two, it is characterized in that: said toe board (1) width is 4.5m or 4m, and thickness is 50-120cm; Consolidation grouting and curtain grouting are established in the basis, are connected with main windrow (12) transition through filter material with downstream face above the built-in toe board (2).
2. according to claim 1 4.5 or 4m type high concrete panel loose rock dam toe board structure, it is characterized in that: bank slope is built the thick external toe board (3) of 30-50cm along toe board (1) outside, and its vertical parting is identical with toe board (1).
3. according to claim 1 4.5 or 4m type high concrete panel loose rock dam toe board structure, it is characterized in that: the thick external toe board (3) of bank slope spray 15-25cm along toe board (1) outside, its vertical parting is identical with toe board (1).
4. according to claim 1 or 2 or 3 described 4.5 or 4m type high concrete panel loose rock dam toe board structure, it is characterized in that: the thickness of said built-in toe board (2) is 15-25cm.
5. according to claim 1 or 2 or 3 described 4.5 or 4m type high concrete panel loose rock dam toe board structure; It is characterized in that: said filter material comprises being laid on respectively above the built-in toe board (2) expects (9) and bedding material (10) with the sub-district of downstream face, and is positioned at the transition material (11) between bedding material (10) and the main windrow (12).
6. the job practices of a kind 4.5 or 4m type high concrete panel loose rock dam toe board structure is characterized in that may further comprise the steps:
A, excavation toe board (1) basis and built-in toe board (2) basis when wherein excavating built-in toe board (2) basis, only need be excavated to solid rock, and sled gets final product except that the loosening sillar in surface;
B, drill holes dowel (6); After treating that slip casting is condensed in the hole; Build toe board that width be 4.5m or 4m (1) from low toward height along toe board (1) basis, on built-in toe board (2) basis, establish built-in toe board (2) simultaneously, and between toe board (1) and built-in toe board (2), establish sealing (7);
C, treat that toe board (1) and built-in toe board (2) condense after, carry out consolidation grouting and curtain grouting respectively according to sequencing;
D, heap are filled out filter material and main windrow.
7. according to claim 6 4.5 or the job practices of 4m type high concrete panel loose rock dam toe board structure, it is characterized in that: after accomplishing above-mentioned steps d, bank slope is established external toe board (3) along toe board (1) outside, and its vertical parting is identical with toe board (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102621941A CN101748708B (en) | 2009-12-23 | 2009-12-23 | 4.5 or 4 meter high toe board structure of concrete-face rick-fill dam and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102621941A CN101748708B (en) | 2009-12-23 | 2009-12-23 | 4.5 or 4 meter high toe board structure of concrete-face rick-fill dam and construction method thereof |
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| Publication Number | Publication Date |
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| CN101748708A CN101748708A (en) | 2010-06-23 |
| CN101748708B true CN101748708B (en) | 2012-08-22 |
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| CN2009102621941A Active CN101748708B (en) | 2009-12-23 | 2009-12-23 | 4.5 or 4 meter high toe board structure of concrete-face rick-fill dam and construction method thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105672205B (en) * | 2016-03-29 | 2018-02-09 | 中国电建集团中南勘测设计研究院有限公司 | A kind of rock leakage preventing structure |
| CN108385612B (en) * | 2018-01-25 | 2020-08-18 | 浙江水利水电学院 | Construction method of concrete protective panel with good stability |
| CN109469017A (en) * | 2018-12-27 | 2019-03-15 | 中国电建集团贵阳勘测设计研究院有限公司 | The design method and convex panel construction and construction method of a kind of concrete face rockfill dam |
| CN109555086B (en) * | 2019-01-11 | 2024-02-06 | 中国电建集团西北勘测设计研究院有限公司 | Rock-fill dam peripheral seam structure and construction method |
| CN110374061B (en) * | 2019-07-25 | 2021-07-02 | 贵州省水利水电勘测设计研究院有限公司 | Toe board alignment determining method and device for rock-fill face dam |
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