CN115045307B - Transverse pushing filling construction method of longitudinal earth-rock cofferdam - Google Patents
Transverse pushing filling construction method of longitudinal earth-rock cofferdam Download PDFInfo
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- CN115045307B CN115045307B CN202210385723.2A CN202210385723A CN115045307B CN 115045307 B CN115045307 B CN 115045307B CN 202210385723 A CN202210385723 A CN 202210385723A CN 115045307 B CN115045307 B CN 115045307B
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- 238000010276 construction Methods 0.000 title claims abstract description 40
- 239000011435 rock Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 14
- 238000010248 power generation Methods 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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- 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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
- E02B3/106—Temporary dykes
- E02B3/108—Temporary dykes with a filling, e.g. filled by water or sand
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Revetment (AREA)
Abstract
A longitudinal earth-rock cofferdam transverse pushing filling construction method comprises the steps of filling cofferdams section by section in the downstream direction of a river channel at the boundary position of a side river bank close to the river channel and a side line of a river beach peninsula formed by alluvial, and connecting multiple sections of cofferdams to form an integral cofferdam structure; the filling method of each section of cofferdam comprises the following steps: a plurality of filling vehicles are arranged side by side along the axis parallel to the cofferdam, and simultaneously the filling vehicles are propelled along the direction perpendicular to the axis of the cofferdam to fill the river course from the bank of the peninsula of the river beach. The invention is suitable for filling construction of arranging the longitudinal earth-rock cofferdam by adopting a staged diversion project, wherein the longitudinal earth-rock cofferdam is arranged on one side of the longitudinal earth-rock cofferdam and is distributed with a river beach peninsula. By adopting the filling method that the filling advancing direction is perpendicular to the axis direction (transverse direction) of the cofferdam, the filling method can achieve the effects that the volume of the filled body formed by filling the primary material in the axial direction is larger than that of the filled body formed by filling the primary material in the river, the dam effect can be formed, and the filled cofferdam material is resisted and protected from being taken away by water flow.
Description
Technical Field
The invention belongs to the technical field of water and electricity hydraulic engineering construction, and particularly relates to a transverse pushing filling construction method of a longitudinal earth-rock cofferdam.
Background
The construction technology of the hydropower engineering is early in starting and rapid in development. According to the current construction manual and related specifications, the construction period of the hydropower engineering needs to arrange cofferdams for construction diversion in order to realize foundation pit dry construction, and for the engineering with the width of the river bed meeting the requirements of two or more sections of construction in the river bed, a stage diversion mode is mostly adopted, and a longitudinal earth-rock cofferdam is generally required to be arranged. On a relatively large river, cofferdam filling is constructed in a dead period.
The conventional construction method comprises the following steps: the underwater part of the cofferdam is constructed by adopting an occupation method, and is compacted back and forth by a dump truck and a bulldozer, and is pushed forward along the axis direction of the cofferdam; filling the water part uniformly, laying and pouring the materials layer by layer, and filling the water part layer by layer from the lower part layer by layer to ensure that the water part cannot be laid and poured along the slope. The spreading direction extends along the axis, and the working surface is layered and uniformly spread and uniformly rolled.
However, currently, basically, each river has a hydropower station which is already built to generate electricity when running, a newly-built power station is influenced by the running and the electricity generation of an upstream power station, and the condition of full-load running of the upstream power station can be met in the dead period, so that the river flow in the dead period is relatively large; especially on large rivers, the influence is more obvious. By adopting the traditional filling method along the axis direction of the cofferdam, the underwater part of the filled material often fails to fill out the water surface, or the water side anti-scour protection fails to be done, and the filled underwater part of the cofferdam can be taken away by water flow when the upstream power generation is high in flow. The cofferdam filling construction difficulty is high, and the progress is slow.
As disclosed in patent CN201420265371.8, a temporary construction site along a river or a gully is constructed, and temporary flood facilities are reasonably arranged on the beach land distributed along the river or the gully, so that the land problem of the temporary construction facilities of the hydropower engineering part can be solved. However, the patent discloses only a layout mode of a temporary building site, and does not disclose a method for pushing and filling a cofferdam.
Disclosure of Invention
The invention mainly aims to provide a transverse pushing filling construction method of a longitudinal earth-rock cofferdam, and aims to solve the technical problems.
In order to achieve the above purpose, the invention provides a construction method for transversely pushing and filling a longitudinal earth-rock cofferdam, which is used for filling cofferdams section by section in the downstream direction of a river channel at the boundary position of a boundary line of a beach peninsula formed by the shoal and the alluvial on one side close to the river channel, and connecting a plurality of sections of cofferdams to form an integral cofferdam structure; the filling method of each section of cofferdam comprises the following steps: a plurality of filling vehicles are arranged side by side along the axis parallel to the cofferdam, and simultaneously the filling vehicles are propelled along the direction perpendicular to the axis of the cofferdam to fill the river course from the bank of the peninsula of the river beach.
Preferably, when the underwater part of each section of cofferdam is filled above the water surface to form a platform, the formed platform is utilized to perform the construction of the anti-impact structure on the upstream surface of the section of cofferdam.
Preferably, the anti-impact structure is a concrete prefabricated part, or a reinforced gabion, or a gabion, or a ton bag.
Preferably, the length of each section of cofferdam is set according to the configuration condition of filling equipment, and the length of each section of cofferdam along the axial direction is set to be 10 m-15 m.
Preferably, a filling road for filling vehicles to pass is arranged on the river beach peninsula.
Preferably, the filling time period of each cofferdam is selected to be carried out when the power generation flow of the upstream power station is low.
Preferably, the anti-collision structure is completed before the upstream large power generation flow affects the construction area.
Preferably, the filling material of the cofferdam can be manually excavated stone blocks, and the maximum grain diameter is controlled to be 1m; or adopting open sand pebble material, controlling the maximum grain diameter to be 0.3m, and ensuring continuous grading; avoiding the use of a water-softening filler.
Preferably, the size of the anti-impact structure is selected according to the impact flow velocity, the length of the concrete prefabricated part is 0.6-1.0 m, the size of the reinforced gabion is 1 x 2m, and the volume of the gabion is 1-2 m3.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) The invention provides a transverse pushing filling construction method which is suitable for filling construction of arranging longitudinal earth-rock cofferdams by adopting a staged diversion project, wherein river beach peninsula is distributed on one side of the longitudinal earth-rock cofferdams. By adopting the filling method that the filling advancing direction is perpendicular to the axis direction (transverse direction) of the cofferdam, the filling method can achieve the effects that the volume of the filled body formed by filling the primary material in the axial direction is larger than that of the filled body formed by filling the primary material in the river, the dam effect can be formed, and the filled cofferdam material is resisted and protected from being taken away by water flow.
(2) Compared with a method for filling a vehicle in the axial direction, a method for filling vehicles from the bank side to the river middle side by side is adopted, a section (10-15 m) of filling platform can be rapidly completed, and the effect of providing a traffic road and a working platform for the construction of anti-impact protection measures on the upstream surface is achieved.
(3) The minimum power generation flow time is selected, the impact protection component with the lowest elevation is constructed downstream as far as possible in advance, impact protection is provided for the immediately-started filling material of the lower cofferdam construction, the quantity of the water carried by the filling material is reduced, the filling success rate of a large quantity of filling bodies is improved, and the construction difficulty is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a transverse pushing filling construction method of a longitudinal earth-rock cofferdam.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
With reference to fig. 1, a certain hydropower station engineering adopts a stage diversion mode, a longitudinal earth-rock cofferdam is arranged on one side of a river channel 1, and a beach peninsula 3 is distributed on the bank side. A longitudinal earth-rock cofferdam horizontal pushing filling construction method, fill cofferdam 4 section by section to the downstream direction of river course 1 in the boundary position of the side river bank near the river course 1 and the side line of the river beach peninsula 3 formed by allusion to the river course, the multistage cofferdam 4 links up to form the whole cofferdam structure; the filling method of each section of cofferdam 4 comprises the following steps: the period of low power generation flow of the upstream power station is selected, a plurality of filling vehicles 5 are arranged side by side along the axis parallel to the cofferdam 4 for resisting water flow, the plurality of filling vehicles 5 simultaneously push to fill the river course 1 from the bank of the beach peninsula 3 along the direction (transverse direction) perpendicular to the axis of the cofferdam 4, the underwater part is filled above the water surface as soon as possible, each circulation of the water part is filled with one layer, and the layer thickness is executed according to the design requirement of the cofferdam.
When the underwater part of each section of cofferdam 4 is filled above the water surface to form a platform, the formed platform is utilized to construct an anti-impact structure 7 on the upstream surface of the section of cofferdam 4, and the anti-impact structure 7 is a concrete prefabricated member, or a reinforced gabion, or a ton bag.
And setting the length of each section of cofferdam according to the filling preparation and filling equipment configuration conditions, wherein the length of each section of cofferdam 4 along the axial direction is 10-15 m.
In this embodiment, a filling road for filling vehicles 5 to pass is provided on the peninsula 3 for facilitating the filling vehicles 5 to pass.
Further, the filling time period of each cofferdam 4 is selected to be carried out when the power generation flow of the upstream power station is small. In order to protect the construction filler of the next cofferdam 4 from being carried by water, the construction filler should be selected to be completed before the upstream large power generation flow affects the construction area in the minimum power generation flow time, and the lowest-elevation impact prevention structure 7 is constructed downstream in advance for one section as much as possible. The impact structure 7 of the water section is preferably spaced from the landfill site according to the construction equipment capacity.
In the embodiment, the filler of the cofferdam 4 can be manually excavated stone blocks, and the maximum grain diameter is controlled to be 1m; or adopting open sand pebble material, controlling the maximum grain diameter to be 0.3m, and ensuring continuous grading; avoiding the use of a water-softening filler.
The size of the anti-impact structure 7 is selected according to the impact flow velocity, the length of the concrete prefabricated part is 0.6-1.0 m, the size of the reinforced gabion is 1 x 2m, and the volume of the gabion is 1-2 m3.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather, the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (8)
1. A longitudinal earth-rock cofferdam transverse propelling filling construction method is characterized in that: filling cofferdams (4) section by section in the downstream direction of the river channel (1) at the boundary position of the side river bank close to the river channel (1) and the side line of the beach peninsula (3) formed by alluvium, and connecting the multi-section cofferdams (4) to form an integral cofferdam structure; the filling method of each section of cofferdam (4) comprises the following steps: a plurality of filling vehicles (5) are arranged side by side along the axis parallel to the cofferdam (4), and the plurality of filling vehicles (5) simultaneously push the river course (1) to be filled from the bank side of the river beach peninsula (3) along the direction vertical to the axis of the cofferdam (4); when the underwater part of each section of cofferdam (4) is filled above the water surface to form a platform, the formed platform is utilized to construct an anti-collision structure (7) on the upstream surface of the section of cofferdam (4); and constructing the impact-resistant structure (7) at the lowest elevation downstream in advance for a certain period.
2. The method for transverse pushing and filling construction of the longitudinal earth-rock cofferdam as set forth in claim 1, wherein the method comprises the following steps: the anti-collision structure (7) is a concrete prefabricated part, or a reinforced gabion, or a gabion, or a ton bag.
3. The method for transverse pushing and filling construction of the longitudinal earth-rock cofferdam as set forth in claim 1, wherein the method comprises the following steps: and setting the length of each section of cofferdam according to the filling preparation and filling equipment configuration conditions, wherein the length of each section of cofferdam (4) along the axial direction is 10-15 m.
4. The method for transverse pushing and filling construction of the longitudinal earth-rock cofferdam as set forth in claim 1, wherein the method comprises the following steps: and a filling road for filling vehicles (5) to pass is arranged on the river beach peninsula (3).
5. The method for transverse pushing and filling construction of the longitudinal earth-rock cofferdam as set forth in claim 1, wherein the method comprises the following steps: the filling time period of each cofferdam (4) is selected when the power generation flow of the upstream power station is small.
6. The method for transverse pushing and filling construction of the longitudinal earth-rock cofferdam as set forth in claim 1, wherein the method comprises the following steps: the anti-collision structure (7) is completed before the upstream large power generation flow influences the construction area.
7. The method for transverse pushing and filling construction of the longitudinal earth-rock cofferdam as set forth in claim 1, wherein the method comprises the following steps: the filler of the cofferdam (4) can be manually excavated stone blocks, and the maximum grain diameter is controlled to be 1m; or adopting open sand pebble material, controlling the maximum grain diameter to be 0.3m, and ensuring continuous grading; avoiding the use of a water-softening filler.
8. The method for transverse pushing and filling construction of the longitudinal earth-rock cofferdam as set forth in claim 2, wherein the method comprises the following steps: the size of the anti-impact structure (7) is selected according to the impact flow velocity, the length of the concrete prefabricated part is 0.6-1.0 m, the size of the reinforced gabion is 1m 2m, and the volume of the gabion is 1-2 m 3 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210385723.2A CN115045307B (en) | 2022-04-13 | 2022-04-13 | Transverse pushing filling construction method of longitudinal earth-rock cofferdam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210385723.2A CN115045307B (en) | 2022-04-13 | 2022-04-13 | Transverse pushing filling construction method of longitudinal earth-rock cofferdam |
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| Publication Number | Publication Date |
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| CN115045307A CN115045307A (en) | 2022-09-13 |
| CN115045307B true CN115045307B (en) | 2024-01-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5758728A (en) * | 1980-09-22 | 1982-04-08 | Nippon Steel Metal Prod Co Ltd | Temporary coffering work for river |
| KR20100052648A (en) * | 2008-11-11 | 2010-05-20 | 최대성 | Construction method of dam without temporary diversion work and dam constructed by the same |
| CN102704444A (en) * | 2012-01-11 | 2012-10-03 | 戴会超 | Closure method capable of avoiding deepwater dyke end slump |
| CN106939587A (en) * | 2017-04-24 | 2017-07-11 | 中国电建集团西北勘测设计研究院有限公司 | A kind of power station major river bed river closure construction method |
| CN110804993A (en) * | 2019-11-26 | 2020-02-18 | 深圳市东深工程有限公司 | River regulation construction method |
| CN112779850A (en) * | 2020-12-31 | 2021-05-11 | 浙大城市学院 | Granular material cargo transporting trestle platform for river-crossing tunnel navigation sealing cofferdam construction and construction method |
-
2022
- 2022-04-13 CN CN202210385723.2A patent/CN115045307B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5758728A (en) * | 1980-09-22 | 1982-04-08 | Nippon Steel Metal Prod Co Ltd | Temporary coffering work for river |
| KR20100052648A (en) * | 2008-11-11 | 2010-05-20 | 최대성 | Construction method of dam without temporary diversion work and dam constructed by the same |
| CN102704444A (en) * | 2012-01-11 | 2012-10-03 | 戴会超 | Closure method capable of avoiding deepwater dyke end slump |
| CN106939587A (en) * | 2017-04-24 | 2017-07-11 | 中国电建集团西北勘测设计研究院有限公司 | A kind of power station major river bed river closure construction method |
| CN110804993A (en) * | 2019-11-26 | 2020-02-18 | 深圳市东深工程有限公司 | River regulation construction method |
| CN112779850A (en) * | 2020-12-31 | 2021-05-11 | 浙大城市学院 | Granular material cargo transporting trestle platform for river-crossing tunnel navigation sealing cofferdam construction and construction method |
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| CN115045307A (en) | 2022-09-13 |
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