CN112982320B - Construction method and structure of core-wall dam heightened concrete faced rockfill dam - Google Patents
Construction method and structure of core-wall dam heightened concrete faced rockfill dam Download PDFInfo
- Publication number
- CN112982320B CN112982320B CN201911278773.5A CN201911278773A CN112982320B CN 112982320 B CN112982320 B CN 112982320B CN 201911278773 A CN201911278773 A CN 201911278773A CN 112982320 B CN112982320 B CN 112982320B
- Authority
- CN
- China
- Prior art keywords
- dam
- original
- wall
- dam body
- plate
- 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.)
- Active
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
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
-
- 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
-
- 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)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention provides a construction method and a structure of a core-wall dam with a raised face rockfill dam, wherein the raised rockfill dam is arranged at the downstream side of an original dam body of the core-wall dam, the center line of a built face rockfill dam is positioned at the downstream side 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 rockfill dam, a dam crest structure of the original dam body is removed, a concrete toe board of the face rockfill 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 board through a connecting board, and the toe board is connected with the face board to form a complete impervious system. The invention can ensure the construction of the dam under the premise of ensuring the safety of the dam, not only saves the investment of heightening the dam, but also does not influence the normal operation of the original reservoir.
Description
Technical Field
The invention relates to a method and a structure for heightening a core dam into a concrete faced rockfill dam, which are suitable for heightening design and construction of an old dam of a hydraulic and hydroelectric engineering.
Background
In the fifties to seventies of the 20 th century, china builds a large number of earth-rock dams so as to solve irrigation and water supply in rural areas and towns. With the development of economic society of China, the water consumption of many cities and 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 purpose of the invention is: aiming at the existing problems, the construction method and the construction structure for the core-wall dam heightening concrete faced rockfill dam 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 rock-fill dam, 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 the original dam body, and pouring concrete toe boards of the concrete faced rockfill dam at the top of the original dam body of the dam crest structure;
(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 replacement rock mounds are firstly carried out, and concrete toe boards are poured on the replacement rock mounds.
According to a second aspect of the present invention, there is provided a structure of a core-wall raised face-plate rock-fill dam, characterized in that a raised rock-fill dam body is provided at a downstream side of an original dam body of the core-wall dam, a center line of the built face-plate rock-fill dam is provided at a downstream side of the center line of the original dam body, a concrete cut-off wall is provided at a core wall portion of the original dam body for the face-plate rock-fill dam, a dam crest structure of the original dam body is removed and concrete toe plates of the face-plate rock-fill dam are cast on top of the original dam body from which the dam crest structure is removed, the concrete cut-off wall is connected to the toe plates through connecting plates, and the toe plates and the face plate are connected to form a complete cut-off system.
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 of the invention, the core-wall dam can be heightened to be the concrete faced rockfill dam, the safety of the dam is ensured, the investment for heightening the dam is saved, and the normal operation of the original reservoir is not influenced during construction.
Drawings
FIG. 1 is a schematic diagram of a built rock-fill dam below the top of an original dam body in the implementation process of the invention.
Figure 2 is a schematic illustration of a face rock-fill dam embodying the present invention after toe board placement.
Figure 3 is a schematic illustration of a raised dam after fill above toe plates in the practice of the invention.
Fig. 4 is a schematic view of the diaphragm wall after construction according to the embodiment of the present invention.
FIG. 5 is a schematic illustration of the concrete panels and webs after construction in accordance with the practice of the invention.
Fig. 6 is a schematic view of the seam water stop in the process of the invention.
Detailed Description
As shown in fig. 1 to fig. 6, the present embodiment is a method and a structure for heightening a core dam into a concrete faced rockfill dam, 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 conducting thickness building and rock-fill dam body heightening 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 portion 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, and connecting the toe plate 6 with a face plate 8 to form a complete impervious system.
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. excavating a dam crest structure 4 of an original dam body, replacing a small amount of rockfill 5, and pouring a concrete toe board 6 on the replaced rockfill 5, wherein the purpose of replacing the rockfill 5 is to reduce the settlement deformation of the toe board 6 and the connecting board 9 after water storage, avoid the deformation damage of water stop 10 and meet the anti-seepage and anti-filtration requirements of the dam body at the same time, as shown in fig. 2;
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 face plate 8.
The above embodiment is merely a preferred technical solution of the present invention, and it should be understood by those skilled in the art that the technical solutions or parameters in the embodiments may be modified or replaced without departing from the principle and essence of the present invention, and all of them should be covered within the protection scope of the present invention.
Claims (1)
1. A construction method for a core-wall dam heightened to a face-plate rock-fill dam is characterized in that the core-wall dam heightened to a face-plate rock-fill dam structure is provided, a heightened rock-fill dam body is arranged on 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 on the downstream side of the center line of the original dam body, a concrete impervious wall is arranged on 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 removed, a concrete toe plate of the face-plate rock-fill dam is poured on the top of the original dam body with the removed dam crest structure, and the concrete impervious wall is connected with the toe plate and the face plate through connecting plates to form a complete impervious system;
the construction method comprises 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 the original dam body, and pouring concrete toe boards (6) of the face plate rock-fill dam at the top of the original dam body of the dam crest structure (4);
(3) Continuously filling a thickened and heightened dam body (3) above the toe plates;
(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 face of the heightening dam body, a toe board and a connecting board (9) between the impervious walls are poured to form a complete impervious system and complete the heightening of the dam;
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 plate (6) and between the toe plate (6) and the panel (8);
in the step (2), after the dam crest structure (4) of the original dam body is excavated, a small amount of replacement rock heaps are firstly carried out, and concrete toe boards are poured on the replacement rock heaps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278773.5A CN112982320B (en) | 2019-12-13 | 2019-12-13 | Construction method and structure of core-wall dam heightened concrete faced rockfill dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278773.5A CN112982320B (en) | 2019-12-13 | 2019-12-13 | Construction method and structure of core-wall dam heightened concrete faced rockfill dam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112982320A CN112982320A (en) | 2021-06-18 |
| CN112982320B true CN112982320B (en) | 2023-02-28 |
Family
ID=76332263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911278773.5A Active CN112982320B (en) | 2019-12-13 | 2019-12-13 | Construction method and structure of core-wall dam heightened concrete faced rockfill dam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112982320B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN208293531U (en) * | 2018-05-14 | 2018-12-28 | 河海大学 | A kind of mini pile soil composite structure of controllable variance sedimentation |
| CN212248107U (en) * | 2019-12-13 | 2020-12-29 | 中国电建集团华东勘测设计研究院有限公司 | Structure of core dam heightening face plate rock-fill dam |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101156873B1 (en) * | 2009-09-11 | 2012-06-21 | 이황의 | Upper structure to increase the height of dam/bank levee crown |
| CN204023501U (en) * | 2014-06-27 | 2014-12-17 | 中国电建集团贵阳勘测设计研究院有限公司 | A remove dangerous and consolidate prevention of seepage processing structure for earth and rockfill dam |
-
2019
- 2019-12-13 CN CN201911278773.5A patent/CN112982320B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN208293531U (en) * | 2018-05-14 | 2018-12-28 | 河海大学 | A kind of mini pile soil composite structure of controllable variance sedimentation |
| CN212248107U (en) * | 2019-12-13 | 2020-12-29 | 中国电建集团华东勘测设计研究院有限公司 | Structure of core dam heightening face plate rock-fill dam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112982320A (en) | 2021-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1963042A (en) | Hydraulic sheeting and use method thereof | |
| CN104594361B (en) | A kind of I shape fender post and building enclosure also serve as the construction method of agent structure | |
| CN103526766A (en) | Method for plugging relief well of deep foundation pit | |
| CN113832921B (en) | Construction method and structure for core wall dam elevation as face rockfill dam combined with toe board foundation treatment | |
| CN113481944B (en) | Construction method of dam surface hole connection girder supporting structure | |
| CN212248107U (en) | Structure of core dam heightening face plate rock-fill dam | |
| CN212000919U (en) | Prevent structure that concrete face dam high toe wall destroyed | |
| CN112982320B (en) | Construction method and structure of core-wall dam heightened concrete faced rockfill dam | |
| CN212714296U (en) | Box type roadbed and bridge transition structure | |
| CN105672443A (en) | Structure integrating anchoring of anti-seepage film, flood interception and passing | |
| CN216691101U (en) | Low side wall of tunnel lining and whole construction formwork of side ditch | |
| CN207537987U (en) | The narrow toe board arrangement of the high CFRD in Narrow Valleys area | |
| CN103388322B (en) | Method for rebuilding diversion tunnel body into flood discharging tunnel body | |
| CN104047273B (en) | Power station dissipation and scouring wall and construction method thereof | |
| CN202055261U (en) | Landslide-proofing retaining wall | |
| CN101603298A (en) | A kind of dam joint structure and job practices thereof | |
| CN112813931A (en) | Heightening mixed dam structure combined with built earth-rock dam and construction method thereof | |
| CN209975481U (en) | Assembled diversion channel of hydropower station | |
| CN203866783U (en) | Gravity type concrete dam for reinforcing earth-rockfill dam | |
| CN109281301B (en) | Construction method for hanging irrigation channel | |
| CN110939108A (en) | Structure for preventing concrete face dam high-toe wall from being damaged | |
| CN103590379B (en) | The easy mounted-dismounted type tunnel mouth baffle device for water of electric power plant circulating water system and construction method thereof | |
| CN215715073U (en) | Heightening mixed dam structure combined with built earth-rock dam | |
| CN217182923U (en) | Assembled drainage silt-proof cable channel | |
| CN221645695U (en) | Water retaining earth-rock dam reconstruction overflow dam structure |
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 |