CN108677980B - Upstream cofferdam heightening method and structure taking traffic function into consideration - Google Patents
Upstream cofferdam heightening method and structure taking traffic function into consideration Download PDFInfo
- Publication number
- CN108677980B CN108677980B CN201810765453.1A CN201810765453A CN108677980B CN 108677980 B CN108677980 B CN 108677980B CN 201810765453 A CN201810765453 A CN 201810765453A CN 108677980 B CN108677980 B CN 108677980B
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- cofferdam
- waste slag
- heightened
- filling
- downstream
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- 238000011144 upstream manufacturing Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000002893 slag Substances 0.000 claims abstract description 47
- 239000002699 waste material Substances 0.000 claims abstract description 47
- 238000010276 construction Methods 0.000 claims abstract description 31
- 230000005484 gravity Effects 0.000 claims abstract description 5
- 239000004567 concrete Substances 0.000 claims description 17
- 238000004873 anchoring Methods 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses an upstream cofferdam heightening method and structure taking account of traffic function, which adopts a thin wall buttress type retaining wall to replace a traditional gravity type retaining wall or a geotechnical bag filling type retaining wall to increase the height of a cofferdam; waste slag filling is carried out on the upstream of the top baffle wall so as to widen the width of the top of the weir, so that a plurality of construction vehicles can pass through simultaneously, and the construction process of main engineering is accelerated; and waste slag filling is also carried out at the two ends of the downstream of the top of the heightened cofferdam, so that a construction vehicle can go to the downstream main engineering for construction through heightening the cofferdam. The cofferdam heightening structure saves engineering cost, increases anti-tilting strength, quickens construction process, gains precious construction time for flood control, and greatly improves the safety of main engineering construction to a certain extent.
Description
Technical Field
The invention relates to the field of hydraulic structures, in particular to an upstream cofferdam heightening method taking traffic functions into consideration and an upstream cofferdam heightening simple structure taking traffic functions into consideration, which are designed by the method.
Technical Field
The main function of the cofferdam is to prevent water and soil from entering the building construction site in order to drain water and excavate foundation pit in the cofferdam, and the height of the cofferdam is higher than the highest water level which can occur in the construction period. However, in recent years, due to the concentration and persistence of rainy seasons, flood flooding and exceeding of flood frequently occur, so that heightening on the basis of an originally designed cofferdam is particularly important.
At present, a lot of researches are conducted on heightening on the basis of cofferdams; the traditional cofferdam heightening basically adopts a method of pouring a gravity retaining wall on the top of the cofferdam or filling by using a geotechnical pipe bag and the like for heightening, but the method has the defects of larger heightened structure body, wasted concrete materials or filling materials, increased investment cost, prolonged construction period and single function, can only provide a flood resisting effect, and has the characteristics of low safety such as anti-overturning performance and anti-permeability performance, which is not enough for developing such rapid water conservancy projects.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the dam crest structure and the method for heightening the cofferdam are convenient to transport, and the cofferdam can be conveniently and quickly heightened, so that the defects that the existing cofferdam structure cannot resist out-of-standard flood, is single in function, long in construction period, uneconomical and the like are overcome.
The invention is realized in the following way:
the method for heightening the upstream cofferdam structure with traffic function comprises the steps of adopting a thin wall buttress type retaining wall to replace a traditional gravity type retaining wall or a geotechnical bag filling type retaining wall to increase the height of the cofferdam; waste slag filling is carried out on the upstream of the top baffle wall so as to widen the width of the top of the weir, so that a plurality of construction vehicles can pass through simultaneously, and the construction process of main engineering is accelerated; and waste slag filling is also carried out at the two ends of the downstream of the top of the heightened cofferdam, so that a construction vehicle can go to the downstream main engineering for construction through heightening the cofferdam.
An upstream cofferdam heightening simple structure designed according to the method and considering traffic functions comprises a heightened concrete structure and a filling waste slag structure; the heightened concrete structure adopts a buttress type retaining wall, and the buttress type retaining wall consists of a thin wall panel, a buttress and an anchoring dowel bar; and the thin wall panel and the buttress are anchored in the cofferdam foundation by the anchoring dowel bars.
The filling waste slag structure comprises upstream waste slag filling, downstream left waste slag filling and downstream right waste slag filling; the upstream side waste slag filling is arranged at the upstream of the thin wall panel and forms a barrage structure, and the downstream left side waste slag filling and the downstream right side waste slag filling are respectively arranged at the left side and the right side of a downstream riverbed of the thin wall panel to form two wing walls.
Further, the heightened concrete structure and the waste slag filling structure are independent but mutually supported.
According to the cofferdam heightening structure method, according to the actual field requirements of certain projects, aiming at the defects of larger size and larger investment cost of the cofferdam top heightening structure, a thin wall type retaining wall is adopted to replace a traditional gravity type retaining wall or a geotechnical bag filled retaining wall to increase the height of the cofferdam; aiming at the requirements of the traditional single-function and modern certain pouring processes, waste slag filling is carried out at the upstream of the top baffle wall so as to widen the width of the top of the weir, so that a plurality of construction vehicles can pass through simultaneously, the construction process of main engineering is accelerated, waste slag filling is also carried out at the two ends of the downstream of the top of the heightened cofferdam, and the construction vehicles can go to the downstream main engineering for construction through heightened cofferdam; the cofferdam heightening structure greatly reduces the pouring amount of concrete from the heightening structure, so that the construction pouring process is improved, the stability of the heightening structure is also improved by the buttress, the upstream side of the cofferdam is used for removing slag and waste, and the permeability of the retaining wall is also improved; from the construction traffic perspective, the waste slag is filled, so that not only is the anti-overturning property of the cofferdam increased, but also the width of a weir roof is widened, and the pouring routes of an upstream cofferdam and a downstream main engineering are communicated, and the increased routes are critical to accelerating the construction process of the main engineering for a plurality of projects, which are incomparable with the traditional heightened cofferdam.
The invention is suitable for resisting the super-standard flood, is also suitable for providing traffic convenience for the downstream main engineering, and is a heightened cofferdam which can resist the flood, can provide traffic convenience for the main engineering pouring, and has simple and economical construction and pouring process.
The cofferdam heightening structure saves engineering cost, increases anti-tilting strength, quickens construction process, gains precious construction time for flood control, and greatly improves the safety of main engineering construction to a certain extent.
Drawings
FIG. 1 is a three-dimensional effect diagram of a cofferdam elevation structure of the present invention;
FIG. 2 is a top view of the cofferdam elevation structure of the present invention;
FIG. 3 is a left side view of FIG. 1;
reference numerals illustrate: 1-thin wall panel, 2-buttress, 3-upstream side waste slag filling, 4-downstream left side waste slag filling, 5-cofferdam foundation, 6-anchoring dowel bars and 7-downstream right side waste slag filling.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1-3: the invention relates to an upstream cofferdam heightening simple structure taking traffic function into consideration, which comprises a heightened concrete structure and a filling and waste slag structure, wherein the waste slag structure is piled and compacted on the upstream side of a heightened retaining wall, and waste slag is filled at the left end and the right end of the downstream side of the heightened structure so as to be communicated with a downstream main body structure in a road. The heightened concrete structure and the waste slag filling structure are independent but mutually supported.
The heightened concrete structure adopts a buttress retaining wall, and the buttress retaining wall is a reinforced concrete thin-wall retaining wall and is mainly characterized by simple structure, convenient construction, smaller wall section, light self-weight, better strength performance of the material and adaptability to the foundation with lower bearing capacity. The buttress type retaining wall comprises a thin wall panel 1, a buttress 2 and an anchoring dowel bar 6, wherein the buttress 2 stands on the downstream of the heightened cofferdam, the anchoring dowel bar 6 is positioned on a heightened foundation surface, and the thin wall panel 1 and the buttress 2 are anchored in a cofferdam foundation 5 by the anchoring dowel bar 6, so that the foundation cofferdam and the heightened cofferdam concrete structure form a whole, and meanwhile, the anti-overturning performance of the heightened concrete structure is improved.
The waste slag filling structure comprises a heightened structure, namely waste slag 3 is filled on the upstream side and waste slag is filled on the left and right ends of the downstream side, namely waste slag filling 4 is filled on the left side of the downstream side and waste slag filling 7 is filled on the right side of the downstream side, waste slag on the two sides is clung to a buttress type retaining wall, and is pushed flat and compacted after filling, wherein the waste slag 3 is filled on the upstream side to widen the width of a weir crest as much as possible, so that running vehicles can pass through simultaneously, thus widening traffic roads and increasing seepage-proofing effect, thereby increasing water blocking capacity and traffic capacity of the whole cofferdam, and the waste slag filling on the left and right sides of the downstream side gradually descends to the ground from the top of the heightened cofferdam according to a certain gradient, and the width is ensured to be at least two-way.
When in pouring, the concrete solid retaining wall is poured in layers (note parting), then the waste slag bodies on the upstream side and the downstream side are respectively filled, and then the pouring is performed in sequence according to the method until the corresponding elevation is reached, so that the road passing can be performed in the pouring process. Therefore, the capacity of resisting exceeding flood is increased, a traffic road is provided for main engineering pouring of people, and the cofferdam heightening structure is convenient to construct, simple in structure, economical, and capable of accelerating construction process.
The above is only a specific application example of the present invention, and other embodiments of the present invention are also possible, and all the technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.
Claims (1)
1. A heightening method of an upstream cofferdam structure taking account of traffic functions is characterized by comprising the following steps of: comprises a heightened concrete structure and a filling waste slag structure; the heightened concrete structure adopts a buttress type retaining wall, and the buttress type retaining wall consists of a thin wall panel (1), a buttress (2) and an anchoring dowel bar (6); the thin wall panel (1) and the buttress (2) are anchored in the cofferdam foundation (5) by the anchoring dowel bars (6), the buttress (2) is erected on the downstream of the heightened cofferdam, and the anchoring dowel bars (6) are positioned on the heightened foundation surface; the filling waste slag structure comprises an upstream waste slag filling (3), a downstream left waste slag filling (4) and a downstream right waste slag filling (7), wherein the upstream waste slag filling (3) is arranged at the upstream of the thin wall panel (1) and forms a barrage structure, and the downstream left waste slag filling (4) and the downstream right waste slag filling (7) are respectively arranged at the left side and the right side of a downstream river bed of the thin wall panel (1) to form two wing walls; the foundation cofferdam and the heightened cofferdam concrete structure form a whole, and simultaneously the anti-overturning property of the heightened concrete structure is improved; stacking and compacting the waste slag structure on the upstream side of the heightened retaining wall, and filling waste slag at the left and right ends of the downstream side of the heightened structure so as to be communicated with a downstream main body structure in a road; the heightened concrete structure and the waste slag filling structure are independent but mutually supported; the thin wall buttress type retaining wall is adopted to replace the traditional gravity type retaining wall or the geotechnical bag filling type retaining wall so as to increase the height of the weir; waste slag filling is carried out on the upstream of the top baffle wall so as to widen the width of the top of the weir, so that a plurality of construction vehicles can pass through simultaneously, and the construction process of main engineering is accelerated; waste slag filling is also carried out at the two downstream ends of the top of the heightened cofferdam, so that a construction vehicle can go to a downstream main body engineering for construction through the heightened cofferdam; and in the casting process, layered casting is adopted, concrete solid retaining walls are cast firstly, waste slag building bodies on the upstream side and the downstream side are respectively filled, and then heightened casting is carried out sequentially according to the method until corresponding elevations are reached, so that road traffic is carried out in the casting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765453.1A CN108677980B (en) | 2018-07-12 | 2018-07-12 | Upstream cofferdam heightening method and structure taking traffic function into consideration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765453.1A CN108677980B (en) | 2018-07-12 | 2018-07-12 | Upstream cofferdam heightening method and structure taking traffic function into consideration |
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| Publication Number | Publication Date |
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| CN108677980A CN108677980A (en) | 2018-10-19 |
| CN108677980B true CN108677980B (en) | 2023-10-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110258469A (en) * | 2019-06-05 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | The flat system in synthesis field for high-mountain gorge areas construction of hydropower plant |
| CN110847126A (en) * | 2019-11-27 | 2020-02-28 | 中国电建集团贵阳勘测设计研究院有限公司 | Compromise small-size sluice structure of flood discharge and layering water intaking, reposition of redundant personnel function |
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| CN108677980A (en) | 2018-10-19 |
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