CN203924007U - A kind of high concrete gravity dam - Google Patents
A kind of high concrete gravity dam Download PDFInfo
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- CN203924007U CN203924007U CN201420374094.4U CN201420374094U CN203924007U CN 203924007 U CN203924007 U CN 203924007U CN 201420374094 U CN201420374094 U CN 201420374094U CN 203924007 U CN203924007 U CN 203924007U
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Abstract
The utility model relates to the high concrete gravity dam that a kind of height exceedes 70 meters, comprise dam body, dam body is divided into multiple dam blocks by longitudinal joint, and described part dam block is the normal concrete dam block that normal concrete is built, and the roller compacted concrete dam block that all the other dam blocks are roller compacted concrete builds.With the high concrete gravity dam contrast that routine divides longitudinal joint, each dam block all to adopt normal concrete to build, part dam block is adjusted into roller compacted concrete dam block by the utility model, met the field requirement of accelerating construction progress; The utility model is taked special seam face grouting treatment measure, has eliminated the concrete performance difference adopting due to each dam block, the material risk that between the asynchronous dam block causing of the heat of hydration, longitudinal joint opens.
Description
Technical field
The utility model relates to the high concrete gravity dam that a kind of height exceedes 70 meters.
Background technology
Concrete gravity dam is generally divided into normality concrete dam, RCCD (Roller Compacted Concrete Dam).
Generally, the normality concrete dam that height of dam is less, dam base width is less, and dam body thermal stresses is lower, and the risk that dam produces crack is less, therefore conventionally regardless of longitudinal joint, concreting without longitudinal joint.
High normality concrete dam, dam base width is larger, as the note of pouring monolithically, dam body thermal stresses is higher, the pressure of on-the-spot temperature controlled anticracking is larger, the risk that dam produces crack is higher, therefore longitudinal joint is set conventionally, dam body is divided into several upright " column pieces ", is called again " dam block ", as shown in Figure 1, the general normal concrete that adopts of each dam block 22 is built, longitudinal joint 21 is general adopts keyway seam, and conventional grouting system is set, and then the conventional grouting system of the longitudinal joint utilization between dam block is in the milk, make dam form entirety, conventional grouting system can only disposablely be used.In rolled concrete arch dam and part concrete gravity dam, for avoiding the longitudinal joint between later stage dam block to open, repetition grouting system also can be set in the transverse joint of rolled concrete arch dam or in the longitudinal joint of concrete gravity dam, conventional grouting system and repetition grouting system are as shown in Figure 2, conventional grouting system comprises into the inlet pipe 1 in loop, conventional grouting system return pipe 2, conventional grouting system inlet pipe 3 for subsequent use, conventional grouting system return pipe 4 for subsequent use etc., repeat grouting system and comprise repetition grouting system inlet pipe 5, repeat grouting system return pipe 6, repeat grouting system inlet pipe 7 for subsequent use, repeat grouting system return pipe 8 for subsequent use, repetition grouting system inlet pipe 5 is also provided with repetition grouting system and enters to starch arm 15, and enter to starch on arm 15 in repetition grouting system and install and repeat grouting system grout cell 14.
Generally, be provided with aperture or structural style complexity or dam body stress level higher or dispose the dam block of more reinforcing bar, must adopt normal concrete.Normality concrete dam is due to the requirement of temperature controlled anticracking and Site Template carrying, and general control is poured into a mould bed thickness 2～3m at every turn, and construction speed is slower, this large shortcoming that is normality concrete dam.
RCCD (Roller Compacted Concrete Dam) is owing to adopting dry dam material, and cement consumption is less, and the pressure of on-the-spot temperature controlled anticracking is less, therefore conventionally regardless of longitudinal joint, roll in logical storehouse.Consider that roller compacted concrete rolls aspect barrier performance poor, a lot of RCCD (Roller Compacted Concrete Dam) adopt the mode of " golden contracted payment ", i.e. the inner roller compacted concrete that adopts, and the outside upstream face that especially meets water adopts thinner normal concrete to carry out antiseepage.This kind " golden contracted payment " mode, roller compacted concrete and normal concrete are conventionally regardless of longitudinal joint, and some is that roller compacted concrete and normal concrete are built simultaneously, after some is roller compacted concrete rising certain altitude, then is close to and builds thinner normal concrete and carry out antiseepage.This " golden contracted payment " mode, because normal concrete thickness is generally thinner, be 1～3m, rigidity is relatively little, and roller compacted concrete and normal concrete are generally regardless of longitudinal joint, normal concrete impervious barrier and inner large volume roller compacted concrete are in conjunction with good, therefore normal concrete layer is generally out of shape with the distortion of roller compacted concrete, under regular situation, dam integrity is better.
Remove outside this " golden contracted payment " mode, if every kind of concrete casting builds up a dam block, probably cause longitudinal joint between dam block repeatedly to open because concrete property especially deformation characteristic is completely different, poor stability.Because dam construction is related to the people's lives and property safety, thus in the time that concrete dam design is constructed, can not adopt different concreting modes to different dam blocks, but adopt the concrete dam of the comparatively stable same concreting of safety.
In addition, it is higher that roller compacted concrete generally rises layer, and more than site operation is controlled at 6m mostly, construction speed is very fast, is the effective means of on-the-spot accelerating construction progress, this large feature that is RCCD (Roller Compacted Concrete Dam).
Summary of the invention
The purpose of this utility model is, the high concrete gravity dam of building in prior art point of longitudinal joint, dam block all adopts normal concrete to build and the slow problem of construction speed that causes, a kind of high concrete gravity dam is proposed, in ensureing high concrete gravity dam overall structure safety, improve the construction speed of high concrete gravity dam.
The technical solution of the utility model is, a kind of high concrete gravity dam, comprises dam body, and dam body is divided into multiple dam blocks by longitudinal joint, described part dam block is the normal concrete dam block that normal concrete is built, and the roller compacted concrete dam block that all the other dam blocks are roller compacted concrete builds.
Must adopt the dam block of normal concrete cast to adopt normal concrete to pour into a mould to part, and be not to adopt normal concrete to build and need the dam block of accelerating construction progress to adopt roller compacted concrete to pour into a mould to all the other, ensureing, under the stable prerequisite of dam body, can greatly to accelerate the construction speed of dam body.
This high concrete gravity dam adopts following damming method to build up,
1) longitudinal joint is set, dam body is divided into multiple dam blocks;
2) must adopt the dam block of normal concrete cast to adopt normal concrete to pour into a mould to part, and not be to adopt normal concrete to build and need the dam block of accelerating construction progress to adopt roller compacted concrete to pour into a mould to all the other;
3), to the longitudinal joint between the dam block of being poured into a mould by roller compacted concrete and the dam block poured into a mould by normal concrete, conventional grouting system is set and repeats grouting system;
4) the conventional grouting system of the longitudinal joint utilization between dam block is in the milk;
5) utilize repetition grouting system to be repeatedly in the milk to the longitudinal joint again opening.
For dam body be provided with aperture, structural style complexity, stress level higher, dispose the situations such as more reinforcing bar and must adopt normal concrete to pour into a mould dam block, and all the other dam blocks are accelerating construction progress, adopt roller compacted concrete to pour into a mould, like this, can adopt as required normal concrete to build some dam blocks, can utilize again roller compacted concrete to build other dam block with accelerating construction progress.Consider that each dam block adopts different types of concrete, its heat of hydration is asynchronous, concrete property especially deformation characteristic is completely different and cause longitudinal joint between dam block repeatedly to open, therefore the longitudinal joint between dam block is except arranging conventional grouting system, also arrange again in addition a set of repetition grouting system, repeating grouting system can be repeatedly used, and is repeatedly in the milk, to ensure the globality of dam structure after dam body longitudinal joint opens.
Conventional grouting system is set in the longitudinal joint between adjacent normal concrete dam block and roller compacted concrete dam block and repeats grouting system.Each dam block adopts different types of concrete, its heat of hydration is asynchronous, concrete property especially deformation characteristic is completely different and cause longitudinal joint between dam block repeatedly to open, therefore the longitudinal joint between dam block is except arranging conventional grouting system, also arrange again in addition a set of repetition grouting system, repeating grouting system can be repeatedly used, and is repeatedly in the milk, to ensure the globality of dam structure after dam body longitudinal joint opens.
The coated galvanized sheet iron of the outer side of described repetition grouting system grout cell.Due to repeat grouting system grout cell newly water block concrete and after water on the seam face between block concrete; for ensureing that the concrete that repetition grouting system grout cell is not built by the later stage all waters extremely; all be cast in the middle of concrete so as not to duplicating grouting system grout cell; in pipe, slurries can not open resilient cover or box in the future; the phenomenon that causes repetition grouting system to lose efficacy; repeating to add a cover galvanized sheet iron protection on grouting system grout cell; later stage concreting just can not contact with grout cell like this, has ensured to repeat the validity of grouting system.
A kind of high concrete gravity dam of the present utility model is for some hydropower station, this power plant dam height of dam 162m, and the former design of dam adopts normality concrete dam, is divided into first, second, the third 3 dam blocks are built, point longitudinal joint between dam block from upstream to downstream.Dam first piece is due to aperture being set, and stress is large, arrangement of reinforcement is more, must adopt normal concrete.Owing to having found Geological Defects in dam foundation excavation process, treatment of geologic defect has delayed the straight line duration, but the final generating dutation of engineering determines, how accelerating construction progress, and guaranteeing generates electricity is on schedule the key technical problem that engineering faces.
Adopt after above-mentioned high concrete gravity dam mixed dam building method, dam first piece is due to aperture being set, and stress is large, arrangement of reinforcement is more, continue to adopt normal concrete according to former design scheme, programming drops into by strengthening on-the-spot resource, overworks day and night, meets reluctantly the predetermined duration.For creationary employing roller compacted concrete fast rise of third of dam second, on dam first piece and second, longitudinal joint between third, except the conventional grouting system of general layout, also arrange in addition repetition grouting system.Due to second, third employing roller compacted concrete fast rise, to compare with dam first piece, resource drops into and greatly reduces, and programming has finally also obtained guarantee.
Dam construction, to top, before engineering retaining, according to former technical requirements, first utilizes conventional grouting system pre-buried on dam body longitudinal joint to be in the milk to dam longitudinal joint, makes dam body form entirety, meets the requirement of engineering retaining.After engineering operation a period of time, because normal concrete dam block is different with the concrete performance that roller compacted concrete dam block adopts, the heat of hydration is asynchronous, finds through monitoring, and dam body longitudinal joint has again certain opening, and the globality of dam body is affected.Scene utilizes again repetition grouting system pre-buried on dam body longitudinal joint to carry out repeating grouting to dam longitudinal joint.Existing engineering operation is normal, repeats the grouting system moment standby, once find that dam body longitudinal joint opens, prepares at any time longitudinal joint to carry out grouting treatment, guarantees the globality of dam body.
With the high concrete gravity dam contrast that routine divides longitudinal joint, each dam block all to adopt normal concrete to build, part dam block is adjusted into roller compacted concrete dam block by the utility model, met the field requirement of accelerating construction progress; The utility model is taked special seam face grouting treatment measure, has eliminated the concrete performance difference adopting due to each dam block, the material risk that between the asynchronous dam block causing of the heat of hydration, longitudinal joint opens.
Brief description of the drawings
Fig. 1 is the structural representation of high concrete gravity dam in background technology;
Fig. 2 is conventional grouting system and the schematic diagram that repeats grouting system;
Fig. 3 is the structural representation of repetition grouting system grout cell;
Fig. 4 is the structural representation of high concrete gravity dam described in the utility model;
In the drawings:
1---conventional grouting system inlet pipe,
2---conventional grouting system return pipe,
3---conventional grouting system inlet pipe for subsequent use,
4---conventional grouting system return pipe for subsequent use,
5---repeat grouting system inlet pipe,
6---repeat grouting system return pipe,
7---repeat grouting system inlet pipe for subsequent use,
8---repeat grouting system return pipe for subsequent use,
9---stack,
10---spare exhaust pipe,
11---irrigated area grout stop plate,
12---air discharge duct,
13---conventional grouting system tube drawing system fall way,
14---repeat grouting system grout cell,
15---repeat grouting system and enter to starch arm,
16---galvanized sheet iron,
17---pitch,
18---first water piece,
19---after water piece,
20---dam crest,
21---the longitudinal joint of keyway is set,
22---dam block,
23---iron nail,
24---conventional concrete dam block,
25---roller compacted concrete dam block.
Detailed description of the invention
as shown in Figure 4, a kind of high concrete gravity dam, comprises dam body, and dam body is divided into 3 dam blocks by longitudinal joint 21, and wherein 1 dam block is the normal concrete dam block 24 that normal concrete is built, and all the other 2 dam blocks are the roller compacted concrete dam block 25 that roller compacted concrete is built.Conventional grouting system is set in the longitudinal joint between adjacent normal concrete dam block 24 and roller compacted concrete dam block 25 and repeats grouting system.
The layout of conventional grouting system and repetition grouting system as shown in Figure 2.
As shown in Figure 3, first water the interior pre-buried iron nail 22 of piece 18, spacing 0.5m, repeat grouting system and enter to starch installation repetition grouting system grout cell 14 on arm 15, repeat grouting system grout cell 14 outer cladding galvanized sheet irons 16, galvanized sheet iron 16 adopts pitch 17 shutoff with the junction of grout cell 14, and galvanized sheet iron 16 is by first watering fixing formerly the watering on the vertical longitudinal joint 21 of piece 18 of the interior pre-buried iron nail 23 of piece 18, and galvanized sheet iron 16 is after semicircle enclosed covers repetition grouting system grout cell 14 and waters piece 19 sides.
High concrete gravity dam in the present embodiment is adopted with the following method and is built up,
1) longitudinal joint 21 is set, dam body is divided into multiple dam blocks;
2) to adopting the dam block of normal concrete cast to adopt normal concrete to pour into normal concrete dam block 24, and not to adopt normal concrete to build and need the dam block of accelerating construction progress to adopt roller compacted concrete to pour into roller compacted concrete dam block 25 to all the other 2;
3), to roller compacted concrete dam block 24 with by the longitudinal joint 21 between normal concrete dam block 25, conventional grouting system is set and repeats grouting system;
4) the conventional grouting system of the longitudinal joint utilization between dam block is in the milk;
5) utilize repetition grouting system to be repeatedly in the milk to the longitudinal joint again opening.
Claims (3)
1. a high concrete gravity dam, comprises dam body, and dam body is divided into multiple dam blocks by longitudinal joint, it is characterized in that, described part dam block is the normal concrete dam block that normal concrete is built, and the roller compacted concrete dam block that all the other dam blocks are roller compacted concrete builds.
2. high concrete gravity dam according to claim 1, is characterized in that, conventional grouting system is set in the longitudinal joint between adjacent normal concrete dam block and roller compacted concrete dam block and repeats grouting system.
3. high concrete gravity dam according to claim 2, is characterized in that, the coated galvanized sheet iron of the outer side of described repetition grouting system grout cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420374094.4U CN203924007U (en) | 2014-07-08 | 2014-07-08 | A kind of high concrete gravity dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420374094.4U CN203924007U (en) | 2014-07-08 | 2014-07-08 | A kind of high concrete gravity dam |
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| Publication Number | Publication Date |
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| CN203924007U true CN203924007U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420374094.4U Withdrawn - After Issue CN203924007U (en) | 2014-07-08 | 2014-07-08 | A kind of high concrete gravity dam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060581A (en) * | 2014-07-08 | 2014-09-24 | 中国电建集团中南勘测设计研究院有限公司 | Mixed constructing method of high concrete gravity dam and high concrete gravity dam |
| CN111636382A (en) * | 2020-06-16 | 2020-09-08 | 中国电建集团贵阳勘测设计研究院有限公司 | Transition layer structure of rock-fill concrete gravity dam and construction method |
| CN112462818A (en) * | 2020-11-27 | 2021-03-09 | 中国电建集团华东勘测设计研究院有限公司 | Control method for highest temperature region of low-heat cement concrete of high arch dam |
-
2014
- 2014-07-08 CN CN201420374094.4U patent/CN203924007U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060581A (en) * | 2014-07-08 | 2014-09-24 | 中国电建集团中南勘测设计研究院有限公司 | Mixed constructing method of high concrete gravity dam and high concrete gravity dam |
| CN104060581B (en) * | 2014-07-08 | 2016-06-08 | 中国电建集团中南勘测设计研究院有限公司 | A kind of high concrete gravity dam mixed dam building method and a kind of high concrete gravity dam |
| CN111636382A (en) * | 2020-06-16 | 2020-09-08 | 中国电建集团贵阳勘测设计研究院有限公司 | Transition layer structure of rock-fill concrete gravity dam and construction method |
| CN112462818A (en) * | 2020-11-27 | 2021-03-09 | 中国电建集团华东勘测设计研究院有限公司 | Control method for highest temperature region of low-heat cement concrete of high arch dam |
| CN112462818B (en) * | 2020-11-27 | 2022-03-18 | 中国电建集团华东勘测设计研究院有限公司 | Control method for highest temperature region of low-heat cement concrete of high arch dam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141105 Effective date of abandoning: 20160608 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |