CN113832921A - Construction method and structure of core-wall dam heightened face-plate rock-fill dam combined with toe-plate foundation treatment - Google Patents
Construction method and structure of core-wall dam heightened face-plate rock-fill dam combined with toe-plate foundation treatment Download PDFInfo
- Publication number
- CN113832921A CN113832921A CN202010586209.6A CN202010586209A CN113832921A CN 113832921 A CN113832921 A CN 113832921A CN 202010586209 A CN202010586209 A CN 202010586209A CN 113832921 A CN113832921 A CN 113832921A
- Authority
- CN
- China
- Prior art keywords
- dam
- concrete
- wall
- toe
- face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/06—Earth-fill dams; Rock-fill dams
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/40—Foundations for dams across valleys or for dam constructions
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention provides a construction method and a structure of a core-wall dam heightening face-plate rock-fill dam combined with toe board foundation treatment, wherein the heightening rock-fill dam body is arranged at the downstream side of the original dam body of the core-wall dam, the center line of the built face-plate rock-fill dam is positioned at the downstream of the center line of the original dam body, a concrete impervious wall is arranged at the core-wall part of the original dam body for the face-plate rock-fill dam, the dam crest structure of the original dam body is dismantled, and the concrete toe boards of the face-plate rock-fill dam are poured at the top of the original dam body with the dam crest structure dismantled, the concrete impervious wall is connected with the toe boards through connecting boards, and the toe boards and the face plates are connected to form a complete impervious system; and, set up the multirow concrete pile in the downstream of concrete cut-off wall, below toe board and connecting plate, the length of concrete pile decreases progressively towards the downstream direction in proper order. The invention not only saves the investment of increasing the dam, but also does not influence the normal operation of the original reservoir on the premise of ensuring the safety of the dam.
Description
Technical Field
The invention relates to a method and a structure for heightening a core wall dam into a face rockfill dam by combining toe board foundation treatment, which are suitable for heightening design and construction of an old dam of hydraulic and hydroelectric engineering.
Background
In the 20 fifties to seventies, a large number of earth-rock dams are built in China to solve irrigation and water supply in rural and urban areas. With the development of economic society of China, the water consumption of many towns and rural areas is obviously increased, and some reservoirs built in the last century can not meet the water supply requirement; in addition, many of the early constructed earth and rockfill dams have been subject to risk problems. Some old dams are heightened to meet the increasing water supply requirements or to perform danger-removing reinforcement on the old dams at the same time. Clay core-wall dams are more in a large number of earth-rock dams built in the fifties to the seventies of the last century. How to heighten the dam on the basis of the old clay core wall dam does not influence the normal operation of the original reservoir, can save the heightening investment of the dam and ensure the safety of the dam, and is a key technology in the heightening design and construction of the old dam.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the existing problems, the construction method and the structure of the core-wall dam heightening face-plate rock-fill dam combined with toe-plate foundation treatment are provided, aiming at saving the investment of heightening the dam and not influencing the normal operation of the original reservoir on the premise of ensuring the safety of the dam.
According to a first aspect of the present invention, there is provided a method of constructing a core-wall dam elevated face-plate rock-fill dam treated in conjunction with a toe-plate foundation, comprising the steps of:
(1) clearing the foundation of the thickened and heightened rockfill dam body on the downstream side of the original dam body of the core wall dam, and filling the thickened rockfill dam body to the planned dismantling elevation of the original dam body;
(2) excavating a dam crest structure of an original dam body, arranging a concrete pile group at the lower part of the design position of the concrete impervious wall and below the design position of the toe plate and the design position of a connecting plate between the toe plate and the concrete impervious wall, and sequentially decreasing the depth of the concrete piles towards the downstream direction; pouring concrete toe boards of the face rockfill dam;
(3) continuously filling a thickened and heightened dam body above the toe boards;
(4) for the face rockfill dam which is reconstructed to be heightened in the future, a concrete impervious wall is implemented at the core wall part of the original dam body;
(5) finally, pouring a connecting plate among the concrete panel, the toe board and the impervious wall on the upstream surface of the heightened dam body to form a complete impervious system and complete dam heightening;
and water stopping structures are arranged at the joints between the impervious wall and the connecting plate, between the connecting plate and the toe plate and between the toe plate and the panel.
Further, in the step (2), after the dam crest structure of the original dam body is excavated, a small amount of rockfill is replaced, the multiple rows of concrete piles are arranged in the replacement layer of the rockfill to the heart wall dam, and concrete toe boards are poured on the replacement layer of the rockfill.
According to a second aspect of the present invention, there is provided a core-wall-raised face-plate rock-fill dam structure treated in combination with toe board foundations, characterized in that a raised rock-fill dam body is provided on the downstream side of the original dam body of the core-wall dam, the center line of the face-plate rock-fill dam completed by construction is on the downstream side of the center line of the original dam body, a concrete cut-off wall is provided on the core wall of the original dam body for the face-plate rock-fill dam, the dam crest structure of the original dam body is removed and concrete toe boards of the face-plate rock-fill dam are poured on the top of the original dam body from which the dam crest structure is removed, the concrete cut-off wall is connected with the toe boards through connecting boards, and the toe boards and the face plates are connected to form a complete cut-off system; and, set up the multirow concrete pile in the downstream of concrete cut-off wall, below toe board and connecting plate, the length of concrete pile decreases progressively towards the downstream direction in proper order.
Further, pile caps are arranged at the pile tops of the multiple rows of concrete piles, and geogrids are laid above the pile caps; the top ends of the multiple rows of concrete piles are positioned on the same horizontal plane.
Furthermore, two water stops are respectively arranged between the concrete impervious wall and the connecting plate, between the connecting plate and the toe plate and between the toe plate and the face plate.
By adopting the technical scheme, the core-wall dam can be heightened into the face-plate rock-fill dam, the original core-wall dam can be fully utilized as a foundation, and the long concrete piles and the short concrete piles are arranged at intervals, so that the deformation modulus and the bearing capacity of the dam foundation can be improved, the uneven settlement is reduced, the influence of different stress conditions on toe plates on the upstream side and the downstream side of the dam body is improved, the stability of the face-plate rock-fill dam on the core-wall dam is improved, and the safety of the dam is ensured; and the investment of increasing the dam is saved, and the normal operation of the original reservoir is not influenced by the construction.
Drawings
FIG. 1 is a schematic diagram of a thick rockfill dam below the top of an original dam body filled in the process of implementing the invention.
Fig. 2 is a schematic view of a face rock-fill dam constructed with toe boards and pile groups thereunder in accordance with the practice of the present invention.
Figure 3 is a raised dam fill above toe plates for the practice of the present invention.
Fig. 4 shows the construction of the diaphragm wall in the process of the invention.
FIG. 5 illustrates concrete panel and web construction during practice of the present invention.
Fig. 6 is a schematic view of the seam water stop in the implementation process of the invention.
Detailed Description
As shown in fig. 1 to 6, the present embodiment is a method and structure for heightening a core dam into a face rockfill dam by combining with toe board foundation treatment, which not only saves the investment of heightening the dam, but also does not affect the normal operation of the original reservoir. The main characteristics of this embodiment are: the method comprises the steps of performing thickness-increasing and rock-fill dam body on the downstream side of an original dam body 1, enabling the center line of a finally-built face plate rock-fill dam to be located on the downstream side of the center line of the original dam body 1, arranging a concrete impervious wall on a core wall 2 of the original dam body 1 for the finally-built face plate rock-fill dam, removing a dam crest structure 4 of the original dam body, pouring a concrete toe plate 6 of the face plate rock-fill dam on the top of the original dam body with the dam crest structure removed, connecting the concrete impervious wall 7 with the toe plate 6 through a connecting plate 9, connecting the toe plate 6 with a face plate 8 to form a complete impervious system, arranging a plurality of rows of concrete piles below the toe plate 6 and the connecting plate 9 on the downstream side of the concrete impervious wall 7, and sequentially decreasing the lengths of the concrete piles towards the downstream direction.
The construction method comprises the following steps:
a. at the downstream side of the original dam body 1, cleaning the foundation of the thickened and raised rockfill dam body, and filling the thickened and raised rockfill dam body 3 to the planned dismantling elevation of the original dam body, as shown in fig. 1;
b. as shown in fig. 2, the dam crest structure 4 of the original dam body is excavated, and the rockfill 5 is replaced a little, and the purpose of replacing the rockfill 5 is to reduce the sedimentation deformation of the toe plates 6 and the connecting plates 9 after water storage, avoid the deformation and damage of the water seal 10, and meet the requirements of seepage prevention and reverse filtration of the dam body.
And arranging two rows of long concrete piles 51 and short concrete piles 52 into the radial wall 2 from a replacement layer formed by the rockfill 5 at the downstream of the design position of the concrete impervious wall 7, wherein the long concrete piles 51 are arranged at the upstream side of the short concrete piles 52, each row of long concrete piles 51 comprises at least two long concrete piles which are distributed at intervals along the axial direction of the dam, and each row of short concrete piles 52 comprises at least two short concrete piles which are distributed at intervals along the axial direction of the dam.
Pile caps 53 are arranged on the pile tops of the long concrete piles 51 and the short concrete piles 52, and geogrids 54 are laid above the pile caps 53. The top ends of the concrete long pile 51 and the concrete short pile 52 are on the same horizontal plane.
Then, a concrete toe board 6 is cast on the replacement rockfill 5.
c. Continuously filling the thickness above the toe boards and raising the dam body 3 to the design height, as shown in figure 3;
d. for a face rockfill dam which is reconstructed to be heightened in the future, a concrete impervious wall 7 is implemented at the position of a core wall 2 of an original dam body 1, as shown in figure 4;
e. finally, pouring a concrete panel 8 and toe plates 6 on the upstream surface of the heightened dam body and a connecting plate 9 between the impervious walls to form a complete impervious system and complete dam heightening, as shown in fig. 5; reference numeral A is a dam body center line of the heightened face rockfill dam;
f. two water stops 10 are arranged at the joints among the impervious wall 7, the connecting plate 9, the toe plate 6 and the panel 8.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above embodiment is merely a preferred embodiment of the present invention, and those skilled in the art will understand that modifications or substitutions of technical solutions or parameters in the embodiment can be made without departing from the principle and essence of the present invention, and all of them shall be covered by the protection scope of the present invention.
Claims (4)
1. A construction method of a core wall dam heightened into a face plate rock-fill dam combined with toe plate foundation treatment is characterized by comprising the following steps:
(1) clearing the foundation of the thickened and raised rockfill dam body at the downstream side of the original dam body of the core wall dam, and filling the thickened rockfill dam body (3) to the planned dismantling elevation of the original dam body;
(2) excavating a dam crest structure (4) of an original dam body, arranging a concrete pile group at the lower reaches of the design position of the concrete impervious wall and below the design position of the toe plates and the design position of a connecting plate between the toe plates and the concrete impervious wall (7), and sequentially decreasing the depth of the concrete piles towards the downstream direction; pouring concrete toe boards (6) of the face rockfill dam;
(3) continuously filling a thickened and heightened dam body (3) above the toe boards;
(4) for a face rockfill dam which is reconstructed to be heightened in the future, a concrete impervious wall (7) is implemented at the core wall part of the original dam body;
(5) finally, a concrete panel (8) on the upstream surface of the heightening dam body, and a connecting plate (9) between the toe board and the impervious wall are poured to form a complete impervious system and complete dam heightening;
and water stopping structures are arranged at the joints between the impervious wall (7) and the connecting plate (9), between the connecting plate (9) and the toe board (6) and between the toe board (6) and the panel (8).
2. The method for constructing a core-wall dam with a toe board foundation as a face rockfill dam according to claim 1, wherein in the step (2), after the dam crest structure (4) of the original dam body is removed, a small amount of rockfill is replaced, the rows of concrete piles are arranged on the core-wall dam in the replacement layer of rockfill, and concrete toe boards are poured on the replacement layer of rockfill.
3. A structure of a core-wall dam heightened into a face-plate rock-fill dam combined with toe-plate foundation treatment is characterized in that a heightened rock-fill dam body is arranged at the downstream side of an original dam body of the core-wall dam, the center line of the built face-plate rock-fill dam is positioned at the downstream side of the center line of the original dam body, a concrete impervious wall is arranged for the face-plate rock-fill dam at the core-wall part of the original dam body, a dam crest structure of the original dam body is removed, a concrete toe plate of the face-plate rock-fill dam is poured at the top of the original dam body with the dam crest structure removed, the concrete impervious wall is connected with the toe plates through connecting plates, and the toe plates and the face plates are connected to form a complete impervious system; and, set up the multirow concrete pile in the downstream of concrete cut-off wall, below toe board and connecting plate, the length of concrete pile decreases progressively towards the downstream direction in proper order.
4. The structure of a toe board foundation processed core-wall dam elevated face-plate rock-fill dam as claimed in claim 1, wherein the top of said rows of concrete piles are provided with pile caps, and a geogrid is laid over said pile caps; the top ends of the multiple rows of concrete piles are positioned on the same horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010586209.6A CN113832921B (en) | 2020-06-24 | 2020-06-24 | Construction method and structure for core wall dam elevation as face rockfill dam combined with toe board foundation treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010586209.6A CN113832921B (en) | 2020-06-24 | 2020-06-24 | Construction method and structure for core wall dam elevation as face rockfill dam combined with toe board foundation treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113832921A true CN113832921A (en) | 2021-12-24 |
| CN113832921B CN113832921B (en) | 2023-06-02 |
Family
ID=78964407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010586209.6A Active CN113832921B (en) | 2020-06-24 | 2020-06-24 | Construction method and structure for core wall dam elevation as face rockfill dam combined with toe board foundation treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113832921B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960555A (en) * | 2022-07-19 | 2022-08-30 | 河南绿岩工程科技有限公司 | Widened seepage-proofing structure for penetrated earth-rock dam and construction method |
| CN117328411A (en) * | 2023-09-13 | 2024-01-02 | 大连理工大学 | Design and construction method of toe board supporting wall for improving deformation of water-stop joint of seepage-proofing body of cover layer upper face plate dam |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007046348A (en) * | 2005-08-10 | 2007-02-22 | Shimizu Corp | Repairing and reinforcing structure for concrete dam |
| CN203716168U (en) * | 2014-01-16 | 2014-07-16 | 黄河勘测规划设计有限公司 | Toe slab foundation structure of deep covering layer of concrete face rockfill dam |
| CN105297680A (en) * | 2015-11-29 | 2016-02-03 | 中国水利水电科学研究院 | Antiseismic design method of impervious body of 200 m high concrete face rockfill dam |
| CN106759133A (en) * | 2017-01-13 | 2017-05-31 | 中国电建集团华东勘测设计研究院有限公司 | The mixing structure of dam type and construction method of a kind of homogeneous earth and rockfill dam and rock |
| CN206971247U (en) * | 2017-06-19 | 2018-02-06 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of concrete plinth foundation ruggedized construction being placed on Unloading Rock |
-
2020
- 2020-06-24 CN CN202010586209.6A patent/CN113832921B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007046348A (en) * | 2005-08-10 | 2007-02-22 | Shimizu Corp | Repairing and reinforcing structure for concrete dam |
| CN203716168U (en) * | 2014-01-16 | 2014-07-16 | 黄河勘测规划设计有限公司 | Toe slab foundation structure of deep covering layer of concrete face rockfill dam |
| CN105297680A (en) * | 2015-11-29 | 2016-02-03 | 中国水利水电科学研究院 | Antiseismic design method of impervious body of 200 m high concrete face rockfill dam |
| CN106759133A (en) * | 2017-01-13 | 2017-05-31 | 中国电建集团华东勘测设计研究院有限公司 | The mixing structure of dam type and construction method of a kind of homogeneous earth and rockfill dam and rock |
| CN206971247U (en) * | 2017-06-19 | 2018-02-06 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of concrete plinth foundation ruggedized construction being placed on Unloading Rock |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114960555A (en) * | 2022-07-19 | 2022-08-30 | 河南绿岩工程科技有限公司 | Widened seepage-proofing structure for penetrated earth-rock dam and construction method |
| CN117328411A (en) * | 2023-09-13 | 2024-01-02 | 大连理工大学 | Design and construction method of toe board supporting wall for improving deformation of water-stop joint of seepage-proofing body of cover layer upper face plate dam |
| CN117328411B (en) * | 2023-09-13 | 2024-03-26 | 大连理工大学 | Design and construction method of toe board supporting wall for improving deformation of water-stop joint of seepage-proofing body of cover layer upper face plate dam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113832921B (en) | 2023-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113832921A (en) | Construction method and structure of core-wall dam heightened face-plate rock-fill dam combined with toe-plate foundation treatment | |
| CN104846781A (en) | Ecological interlocking block and ecological interlocking block type slope protection construction method | |
| CN111042053A (en) | Permanent temporary combined retaining wall structure in urban hydraulic engineering and construction method thereof | |
| CN110777850A (en) | Existing pipe gallery underground space, supporting structure thereof and construction method of supporting structure | |
| CN107816050B (en) | Concrete cofferdam and earth-rock cofferdam combined cofferdam and construction method thereof | |
| CN114032934A (en) | Safe riverway cofferdam and construction method thereof | |
| CN107740708B (en) | Construction structure and construction method for preventing leakage of tunnel arch wall foot | |
| CN112854144A (en) | Construction structure of earth-rock dam on deep sludge layer and construction method thereof | |
| CN219157569U (en) | Core wall rock-fill dam structure | |
| CN212248107U (en) | Structure of core dam heightening face plate rock-fill dam | |
| CN111576438A (en) | Support system for deep foundation pit and construction method thereof | |
| CN110685287A (en) | Double-row pile foundation pit supporting system with drainage ditch and retaining wall and construction method | |
| CN202055261U (en) | Landslide-proofing retaining wall | |
| CN112982320B (en) | Construction method and structure of core-wall dam heightened concrete faced rockfill dam | |
| CN211872840U (en) | Face combination retaining wall structure forever among urban hydraulic engineering | |
| CN112095617A (en) | Deep pit supporting structure in foundation pit and construction method thereof | |
| CN216892211U (en) | Flood control wall type dike structure | |
| CN216194776U (en) | Grid-shaped rotary jet grouting pile supporting structure for grouting reinforced deep foundation pit | |
| CN219886925U (en) | Pile plate structure combined permanently | |
| CN216948070U (en) | Steel sheet pile and retaining wall comprehensive water-intercepting and soil-retaining structure of riverside building | |
| CN213038417U (en) | Toe board foundation reinforcing structure of overlying layer upper face rock-fill dam | |
| CN212561605U (en) | Unloading type groove-shaped retaining wall structure | |
| CN214657076U (en) | Prefabricated precipitation square pile and underground side wall steel plate superposed structure system | |
| CN217601487U (en) | Dredging well plugging construction node | |
| CN214782982U (en) | Roadbed structure suitable for bridge connection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |