CN104032714A - Once-closure and staging-closure combined dam type power plant construction diversion method - Google Patents
Once-closure and staging-closure combined dam type power plant construction diversion method Download PDFInfo
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- CN104032714A CN104032714A CN201410293693.8A CN201410293693A CN104032714A CN 104032714 A CN104032714 A CN 104032714A CN 201410293693 A CN201410293693 A CN 201410293693A CN 104032714 A CN104032714 A CN 104032714A
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Abstract
The invention relates to a once-closure and staging-closure combined dam type power plant construction diversion method and aims to reduce technical difficulty and risk, control construction flood season water level, reduce engineering cost and shorten generation period. The technical scheme includes steps of a, respectively building an entrance cofferdam and an exit cofferdam at the entrance and the exit of a diversion tunnel to be built on the first bank of a riverway; b, constructing the diversion tunnel, and excavating part of a first-stage foundation pit on the dry land on the first bank of the riverway; c, dismantling the entrance cofferdam and the exit cofferdam; d, constructing an upstream dry-season sub-cofferdam and a downstream dry-season sub-cofferdam of a once-closure riverbed on the riverway; e, constructing a longitudinal annual water-retaining cofferdam distributed along the riverway in the first-stage foundation pit close to the bank of the riverway by means of a dry season, and planning to excavate the second-stage foundation pit on the other side of the longitudinal annular water-retaining cofferdam; f, constructing behind-dam power generation plant in the dry season and the flood period in the first-stage foundation pit, and constructing a dam flood-discharge section in the second-stage foundation pit in the dry season.
Description
Technical field
The present invention relates to a kind of disconnected dam-type power plant construction diversion method with block disconnected combination by stages of once blocking.Be applicable to all water conservancy project Project Layout Design of One and the constructions in not obvious river course of wide, narrow feature.
Background technology
According to " Construction of Hydropower Engineering is organized design specifications " and conventional design thinking, in the water conservancy project Project Layout Design of One and construction of dam-type power plant, can adopt two kinds of construction diversion methods.
The first: if geological conditions is better, and river course is narrower, can adopt tunnel diversion or bank channel diversion mode, once block disconnected river course later full section build the construction diversion method of water conservancy project multi-purpose project, its outstanding advantages is that water conservancy project hinge is arranged and not restricted by construction diversion method; Shortcoming is on the one hand that the generating duration is conventionally longer, and engineering cost is also larger, and the water level of passing the flood period is relatively high the construction period on the other hand, and immigrant is controlled to water level and construction speed impacts.
The second: if river course is wider, can adopt stage diversion mode, block after disconnected river course by stages and build piecemeal water conservancy project multi-purpose project by the phase, its outstanding advantages is that the water level control of passing the flood period the construction period is relatively flexible; Its shortcoming is that water conservancy project multi-purpose project is arranged the restriction that is limited by construction diversion mode, adjusts leeway less, and longitudinal cofferdam is poor to the compliance of not clear geological conditions, has certain risk.
If wide, the narrow feature in river course is all not obvious, or water level has immigrant to control the restrictions such as water level because geological conditions is poor, the construction period passes the flood period, or the reason of the aspects such as engineering cost and generating duration control, while adopting above two kinds of construction diversion modes all can not obtain gratifying effect, how to carry out easily water conservancy project Project Layout Design of One and the construction of dam-type power plant, and to reduce construction difficulty and risk, engineering cost and generating duration be the problem that is worth deep thinking.
Summary of the invention
The technical problem to be solved in the present invention is: for the problem of above-mentioned existence, provide a kind of and river width to adapt, the disconnected dam-type power plant construction diversion method with block disconnected combination by stages is once blocked in construction easily, reach reduce technical difficulty and risk, control construction period pass the flood period water level, reduce engineering cost and shorten the object of generating duration.
The technical solution adopted in the present invention is: a kind of once blocking broken and the dam-type power plant construction diversion method of by stages blocking disconnected combination, it is characterized in that step is as follows:
A, intend building the import and export position of diversion tunnel at river course one bank and build respectively import cofferdam and outlet cofferdam;
B, import cofferdam and outlet cofferdam going along with sb. to guard him under build diversion tunnel; When diversion tunnel is built, the first phase foundation ditch of excavation part on Yi An nonirrigated farmland, river course, and the part first phase foundation ditch completing aspire to excavation at low water is built power plant building behind part dam;
C, after diversion tunnel has been built, remove import cofferdam and outlet cofferdam;
D, on the river course between first phase foundation ditch and former import cofferdam, build disposable sub-cofferdam in dry season, upstream of blocking disconnected riverbed, on the river course between first phase foundation ditch and former outlet cofferdam, build disposable sub-cofferdam in dry season, downstream of blocking the riverbed that breaks;
Under the going along with sb. to guard him in e, sub-cofferdam in dry season, upstream and downstream, build the longitudinal annual water-retaining cofferdam of arranging along river course at the first phase foundation ditch of intending excavation a dry season by utilizing on side riverbank, river course, longitudinal annual water-retaining cofferdam opposite side is the second stage of foundation ditch of intending excavation;
Build the horizontal water-retaining cofferdam of first phase cross machine direction upstream water-retaining cofferdam and first phase downstream that is positioned at first phase foundation ditch upstream and downstream and is connected with longitudinal annual water-retaining cofferdam, excavation first phase foundation ditch; Simultaneously, pump drainage river course ponding under the going along with sb. to guard him in sub-cofferdam in dry season, upstream and downstream, the horizontal overflow cofferdam of the second stage of cross machine direction upstream overflow cofferdam and the second stage of downstream that utilizes build a dry season to be positioned at the second stage of foundation ditch upstream and downstream and to be connected with longitudinal annual water-retaining cofferdam, and excavate the second stage of foundation ditch in dry season;
Build f, inherent dry season of first phase foundation ditch and flood period power plant building behind dam; Second phase foundation ditch is built dam flood-discharge monolith inherent dry season.
In step b, nonirrigated farmland is the nonirrigated farmland that Temporary Cofferdam is gone along with sb. to guard him lower formation; This Temporary Cofferdam is removed after having built in sub-cofferdam in dry season, upstream and sub-cofferdam in dry season, downstream.
Sub-cofferdam in dry season, described upstream, sub-cofferdam in dry season, downstream, the horizontal overflow cofferdam of the second stage of cross machine direction upstream overflow cofferdam and the second stage of downstream be dry season dash, cross the cofferdam of water flood period.
Described longitudinal annual water-retaining cofferdam, the horizontal water-retaining cofferdam of first phase cross machine direction upstream water-retaining cofferdam and first phase downstream are the cofferdam at equal dash of dry season, flood period.
On described longitudinal annual water-retaining cofferdam, corresponding first phase foundation ditch section is for leading wall monolith, and behind described dam, power plant building is connected through leading wall monolith with dam flood-discharge monolith.
The invention has the beneficial effects as follows: one, the present invention started to build Construction for Key Works of Port (being power plant building behind Yi An dam, river course) before damming, and continual building until the operation of generating electricity still after damming, thereby reach the object that shortens the generating duration.Its two, the present invention utilizes going along with sb. to guard him of sub-cofferdam in dry season, upstream and downstream after damming, longitudinal annual water-retaining cofferdam of constructing has been evaded the risk producing because of not clear geological conditions in work progress.They are three years old, the present invention utilizes the non-key project of engineering (being in river course and the dam flood-discharge monolith of another bank) to allow relatively well-to-do feature of overcurrent, duration flood period, solved a difficult problem for immigration restriction water level, also diversion tunnel and the cofferdam of large-size have been avoided building, thereby reach the object that adapts to poor geological conditions, reduction technical difficulty and risk, saving engineering cost, adapted to preferably all unconspicuous river course conditions of wide, narrow feature.
Brief description of the drawings
Fig. 1 be in embodiment the stage construction diversion stage arrange schematic diagram before damming.
Fig. 2 be in embodiment the stage construction diversion stage arrange schematic diagram after damming.
Fig. 3 is the layout schematic diagram in Second Construction water conservancy diversion stage in embodiment.
Detailed description of the invention
The present embodiment is a kind of disconnected dam-type power plant construction diversion method with block disconnected combination by stages of once blocking, and Specific construction order and method are as follows:
A, intend building the import and export position of diversion tunnel 2 at river course one bank and build respectively import cofferdam 4 and outlet cofferdam 5;
B, as shown in Figure 1 builds diversion tunnel 2 under the going along with sb. to guard him in import cofferdam 4 and outlet cofferdam 5; When diversion tunnel 2 is built, intend excavation first phase foundation ditch 1 position at river course one bank Temporary Cofferdam 3 (Parallel to the flow direction) is set, the first phase foundation ditch 1 of excavation part under Temporary Cofferdam is safeguarded, and in the part first phase foundation ditch completing aspire to excavation at low water, build power plant building behind the part dam of engineering construction key project, the flood in this stage carries out earial drainage by former river course;
C, after diversion tunnel 2 has been built, remove import cofferdam 4 and outlet cofferdam 5;
D, carry out river closure, on the river course between first phase foundation ditch 1 and former import cofferdam 4, build disposable sub-cofferdam 6 in dry season, upstream of blocking disconnected riverbed, on the river course between first phase foundation ditch 1 and former outlet cofferdam 5, build disposable sub-cofferdam 7 in dry season, downstream (seeing Fig. 2) of blocking disconnected riverbed;
E, dismounting Temporary Cofferdam 3; Under the going along with sb. to guard him in sub-cofferdam in dry season, upstream and downstream, having built by utilizing on side riverbank, river course the longitudinal annual water-retaining cofferdam 9 of arranging along river course at the first phase foundation ditch 1 of intending excavation a dry season, is the second stage of foundation ditch 14 of intending excavation in the corresponding first phase foundation ditch of longitudinal annual water-retaining cofferdam 9 opposite sides 1 position;
Build the horizontal water-retaining cofferdam 11 of first phase cross machine direction upstream water-retaining cofferdam 10 and first phase downstream that is positioned at first phase foundation ditch 1 upstream and downstream and is connected with longitudinal annual water-retaining cofferdam 9, then excavate first phase foundation ditch 1; Simultaneously, pump drainage river course ponding under the going along with sb. to guard him in sub-cofferdam in dry season, upstream and downstream, the horizontal overflow cofferdam 13 of the second stage of cross machine direction upstream overflow cofferdam 12 and the second stage of downstream that utilizes build a dry season to be positioned at the second stage of foundation ditch 14 upstream and downstream and to be connected with longitudinal annual water-retaining cofferdam 9, excavates the second stage of foundation ditch 14 (seeing Fig. 3) afterwards in dry season;
F, in the second stage of foundation ditch 14, under the going along with sb. to guard him of the horizontal overflow cofferdam in the second stage of upstream and downstream, carry out building of dam flood-discharge monolith in dry season, the low discharge flood in dry season carries out earial drainage by diversion tunnel 2; Suspend building of dam flood-discharge monolith flood period, the large flow flood of flood period is combined earial drainage by the dam flood-discharge monolith of diversion tunnel 2 and suspension of works;
Simultaneously, in first phase foundation ditch 1, no matter it is dry season or flood period, all under the going along with sb. to guard him of longitudinal annual water-retaining cofferdam 9, first phase cross machine direction upstream water-retaining cofferdam 10, the horizontal water-retaining cofferdam 11 in first phase downstream, all the time continually build power plant building behind dam, until power generation and completion of works.
The present embodiment middle and upper reaches sub-cofferdam 6 in dry season, sub-cofferdam 7 in dry season, downstream, the horizontal overflow cofferdam 13 of the second stage of cross machine direction upstream overflow cofferdam 12 and the second stage of downstream possess dash in dry season, cross the function of water flood period.Longitudinal annual water-retaining cofferdam 9, the horizontal water-retaining cofferdam 11 of first phase cross machine direction upstream water-retaining cofferdam 10 and first phase downstream possess the function of annual dash (dry season, flood period equal dash), to ensure the uninterrupted construction of power plant building behind whole dams of engineering construction key project.
In this example, on longitudinal annual water-retaining cofferdam 9,1 section of corresponding first phase foundation ditch is for leading wall monolith 8, and behind dam, power plant building is connected through leading wall monolith 8 with dam flood-discharge monolith.
Claims (5)
1. once block a disconnected dam-type power plant construction diversion method with block disconnected combination by stages, it is characterized in that step is as follows:
A, river course one bank intend build diversion tunnel (2) import and export position build respectively import cofferdam (4) and export cofferdam (5);
B, import cofferdam (4) and outlet cofferdam (5) going along with sb. to guard him under build diversion tunnel (2); When diversion tunnel (2) is built, the first phase foundation ditch (1) of excavation part on Yi An nonirrigated farmland, river course, and build power plant building behind part dam in the part first phase foundation ditch completing aspire to excavation at low water;
C, after diversion tunnel (2) has been built, remove import cofferdam (4) and export cofferdam (5);
D, on the river course between first phase foundation ditch (1) and former import cofferdam (4), build disposable sub-cofferdam in dry season, upstream (6) of blocking disconnected riverbed, on the river course between first phase foundation ditch (1) and former outlet cofferdam (5), build disposable sub-cofferdam in dry season, downstream (7) of blocking the riverbed that breaks;
Under the going along with sb. to guard him in e, sub-cofferdam in dry season, upstream and downstream, build by utilizing on side riverbank, river course the longitudinal annual water-retaining cofferdam (9) of arranging along river course at the first phase foundation ditch (1) of intending excavation a dry season, longitudinal annual water-retaining cofferdam (9) opposite side is the second stage of foundation ditch (14) of intending excavation;
Build the horizontal water-retaining cofferdam of first phase cross machine direction upstream water-retaining cofferdam (10) and first phase downstream (11) that is positioned at first phase foundation ditch (1) upstream and downstream and is connected with longitudinal annual water-retaining cofferdam (9), excavation first phase foundation ditch (1); Simultaneously, pump drainage river course ponding under the going along with sb. to guard him in sub-cofferdam in dry season, upstream and downstream, the horizontal overflow cofferdam of the second stage of cross machine direction upstream overflow cofferdam (12) and the second stage of downstream (13) that utilizes build a dry season to be positioned at the second stage of foundation ditch (14) upstream and downstream and to be connected with longitudinal annual water-retaining cofferdam (9), and excavate the second stage of foundation ditch (14) in dry season;
Build f, inherent dry season of first phase foundation ditch (1) and flood period power plant building behind dam; Second phase foundation ditch (14) is built dam flood-discharge monolith inherent dry season.
2. according to claim 1 once blocking broken and the dam-type power plant construction diversion method of by stages blocking disconnected combination, it is characterized in that: in step b, nonirrigated farmland is the nonirrigated farmland that Temporary Cofferdam (3) is gone along with sb. to guard him lower formation; This Temporary Cofferdam has been built rear dismounting in sub-cofferdam in dry season, upstream (6) and sub-cofferdam in dry season, downstream (7).
3. according to claim 1ly once block the disconnected dam-type power plant construction diversion method with block disconnected combination by stages, it is characterized in that: sub-cofferdam in dry season, described upstream (6), sub-cofferdam in dry season, downstream (7), the horizontal overflow cofferdam of the second stage of cross machine direction upstream overflow cofferdam (12) and the second stage of downstream (13) be dry season dash, cross the cofferdam of water flood period.
4. according to claim 1ly once block the disconnected dam-type power plant construction diversion method with block disconnected combination by stages, it is characterized in that: described longitudinal annual water-retaining cofferdam (9), the horizontal water-retaining cofferdam of first phase cross machine direction upstream water-retaining cofferdam (10) and first phase downstream (11) are the cofferdam at equal dash of dry season, flood period.
5. according to claim 1 once blocking broken and the dam-type power plant construction diversion method of by stages blocking disconnected combination, it is characterized in that: upper corresponding first phase foundation ditch (1) section of described longitudinal annual water-retaining cofferdam (9) is for leading wall monolith (8), and behind described dam, power plant building is connected through leading wall monolith (8) with dam flood-discharge monolith.
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| CN201410293693.8A CN104032714B (en) | 2014-06-25 | 2014-06-25 | Once block disconnected and block the disconnected dam-type power plant construction diversion method combined by stages |
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| CN105178648A (en) * | 2015-10-13 | 2015-12-23 | 中国电建集团成都勘测设计研究院有限公司 | Shore-side plant structure for hydropower station in easy-to-seep mountainous area |
| CN107152035A (en) * | 2017-06-06 | 2017-09-12 | 中国华冶科工集团有限公司 | The construction method of underground pipe gallery river crossing |
| CN107761654A (en) * | 2017-10-31 | 2018-03-06 | 中国电建集团成都勘测设计研究院有限公司 | High dam construction mid-term flood control flood-passing scheme decision-making technique under step construction condition |
| CN107858990A (en) * | 2017-12-13 | 2018-03-30 | 中国电建集团成都勘测设计研究院有限公司 | The arrangement of Canyon Area high dam ditch engineering of water treatment |
| CN108677880A (en) * | 2018-07-27 | 2018-10-19 | 中国电建集团成都勘测设计研究院有限公司 | For the stake woods dam under complex geological condition |
| CN109371934A (en) * | 2018-11-30 | 2019-02-22 | 中国电建集团成都勘测设计研究院有限公司 | Dam-type power plant construction diversion structure |
| CN113718817A (en) * | 2021-08-05 | 2021-11-30 | 中国电建集团北京勘测设计研究院有限公司 | Construction method for treating dam foundation of staged diversion hydropower engineering |
| CN114809045A (en) * | 2022-05-24 | 2022-07-29 | 四川省水利电力工程局有限公司 | Hydropower station factory building cofferdam structure and construction method thereof |
| CN117230819A (en) * | 2023-07-27 | 2023-12-15 | 中国水利水电第三工程局有限公司 | Hydropower station factory building foundation pit under stage cofferdam diversion working condition and tail water channel construction method thereof |
| CN117328410A (en) * | 2023-09-07 | 2024-01-02 | 北京城建道桥建设集团有限公司 | Dam blocking construction method with low excavation quantity and rapid construction |
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| CN105178648A (en) * | 2015-10-13 | 2015-12-23 | 中国电建集团成都勘测设计研究院有限公司 | Shore-side plant structure for hydropower station in easy-to-seep mountainous area |
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| CN107761654B (en) * | 2017-10-31 | 2019-05-17 | 中国电建集团成都勘测设计研究院有限公司 | High dam construction mid-term flood control flood-passing scheme decision-making technique under step construction condition |
| CN107761654A (en) * | 2017-10-31 | 2018-03-06 | 中国电建集团成都勘测设计研究院有限公司 | High dam construction mid-term flood control flood-passing scheme decision-making technique under step construction condition |
| CN107858990A (en) * | 2017-12-13 | 2018-03-30 | 中国电建集团成都勘测设计研究院有限公司 | The arrangement of Canyon Area high dam ditch engineering of water treatment |
| CN107858990B (en) * | 2017-12-13 | 2023-09-01 | 中国电建集团成都勘测设计研究院有限公司 | Diversion construction method of arrangement structure of canyon area high dam ditch water treatment engineering |
| CN108677880A (en) * | 2018-07-27 | 2018-10-19 | 中国电建集团成都勘测设计研究院有限公司 | For the stake woods dam under complex geological condition |
| CN108677880B (en) * | 2018-07-27 | 2024-03-19 | 中国电建集团成都勘测设计研究院有限公司 | Pile-forest dam for complex geological conditions |
| CN109371934A (en) * | 2018-11-30 | 2019-02-22 | 中国电建集团成都勘测设计研究院有限公司 | Dam-type power plant construction diversion structure |
| CN113718817A (en) * | 2021-08-05 | 2021-11-30 | 中国电建集团北京勘测设计研究院有限公司 | Construction method for treating dam foundation of staged diversion hydropower engineering |
| CN113718817B (en) * | 2021-08-05 | 2023-01-24 | 中国电建集团北京勘测设计研究院有限公司 | Construction method for treating dam foundation of staged diversion hydropower engineering |
| CN114809045A (en) * | 2022-05-24 | 2022-07-29 | 四川省水利电力工程局有限公司 | Hydropower station factory building cofferdam structure and construction method thereof |
| CN117230819A (en) * | 2023-07-27 | 2023-12-15 | 中国水利水电第三工程局有限公司 | Hydropower station factory building foundation pit under stage cofferdam diversion working condition and tail water channel construction method thereof |
| CN117328410A (en) * | 2023-09-07 | 2024-01-02 | 北京城建道桥建设集团有限公司 | Dam blocking construction method with low excavation quantity and rapid construction |
| CN117328410B (en) * | 2023-09-07 | 2024-04-23 | 北京城建道桥建设集团有限公司 | Dam blocking construction method with low excavation quantity and rapid construction |
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