CN101824810A - Method for protecting river bank by sand-river pile group and flexible mattresses - Google Patents
Method for protecting river bank by sand-river pile group and flexible mattresses Download PDFInfo
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- CN101824810A CN101824810A CN 201010142452 CN201010142452A CN101824810A CN 101824810 A CN101824810 A CN 101824810A CN 201010142452 CN201010142452 CN 201010142452 CN 201010142452 A CN201010142452 A CN 201010142452A CN 101824810 A CN101824810 A CN 101824810A
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Abstract
The invention discloses a method for protecting the river bank by a sand-river pile group and flexible mattresses, which comprises the step of arranging flexible mattress protective structures along the banks of the river, and is characterized in that the pile group consisting of at least two rows of protective piles is also arranged outside the side edge of the river bed in which the flexible mattress protective structure is arranged and used for protecting the river bank. When the method is specifically implemented, the flexible mattress protective structure generally can extend to the position 8 to 17m under the underwater river bed, the protective piles adopt concrete square piles, the lower end of each concrete square pile is rooted in the position about 10m under the bottom of the river bed so as to make the protective pile keep stable, and the height of the upper end of each concrete square file exceeds the design flood level. In the method, the pipe group arranged in the river bed outside the flexible mattresses can make a downstream and dank effect, and make the flow velocity of the water greatly slow down after flowing through the pile group by the streaming function, thereby reducing the scouring capability of the water flow and avoiding the damage to the flexible mattresses so as to achieve good bank protection effect.
Description
Technical field
The present invention relates to the riparian protection technology, the method on especially a kind of fine sand river pile group-soft raft complex protection riverbank.
Background technology
At present, in the riparian protection field, the mode that has a kind of structure that adopts soft raft to protect do not influence water flow structure because of possessing, implement advantage such as convenient, that protection effect is better uses wider.Described soft raft safeguard structure mainly is made of some concrete rectangular pieces; adopt member such as hinge to combine as a whole between each rectangular block and cover must the riverbank of protection on; usually soft raft protection structure must be disposed to maximum stage line place, river at the riverbank end; in the riverbed, extend 8-17 rice distance; its river silt that can prevent the rectangular block below is taken away by current scour, plays the better protect effect.
Yet, in fine sand type river, because bed material is very thin, impact resilience is low, thereby it is big at some flow velocitys, the section that has plume and oblique impact current, it is very big that river washes away dynamics to soft raft itself and following bed material, the silt that often causes river soon soft raft to be positioned at below, lateral edges place, riverbed washes away, formation is towards the dead zone, along with this scope towards the dead zone increases gradually, the rectangular block that soft raft is positioned at the riverbed side can occur sinking, phenomenon such as subside, and then cause all the other position soft rafts to occur arching upward, situations such as hinge bursts apart occur, thereby destroy the globality of soft raft.After soft raft is destructurized, promptly cause the failure of bank protection.
So it is good how to design a kind of protection effect, the bank protection technology that is particularly suitable for implementing in fine sand type river promptly becomes the present technique field a difficult problem to be solved.
Summary of the invention
Technical problem to be solved by this invention is: overcome above-mentioned the deficiencies in the prior art, provide a kind of protection effect good, and be particularly suitable for the method on fine sand river pile group-soft raft complex protection riverbank of practicing in fine sand type river.
In order to solve the problems of the technologies described above, adopted following technical scheme among the present invention:
The method on a kind of fine sand river pile group-soft raft complex protection riverbank; comprise along river alongshore soft raft protection structure is set; its characteristics are, outside described soft raft protection structure riverbed lateral edges, also are provided with the pile group that is made of at least two row's protection stakes and protect.During concrete enforcement, generally can make the riverbed 8-17 rice distance of soft raft protection extensibility of structure beyond to the riverbank, a concrete square pile is adopted in the protection stake, and its lower end is rooted in about 10 meters of bottoms, riverbed can make it keep stable, and its upper end highly exceeds more than the design flood level.In addition, geotextiles is laid in soft raft below, prevents that water erosion from taking away fine sand.
In this method; the pile group that is provided with in the soft raft river bed outside can make most river be blocked in it is gone downstream; the part current are when passing pile group; be subjected to a clump of piles to stream the influence of resistance; make the flow rate of water flow that sees through the protection stake slow down greatly; be difficult to again soft raft and edge downside silt thereof produced and wash away more greatly, avoid soft raft because of washing away the destruction that produces, thereby the riverbank is reached the excellent protection effect.
As optimization, the pile group of setting can be made of four row's protection stakes, and clear distance should not be greater than 3 times stake footpath between it.Show that according to patent applicant's result of study a clump of piles streams for the inhibition of current clearly, and pile spacing streams resistance to a clump of piles bigger influence is arranged, the pile group resistance coefficient reduces along with the increase of clear distance between stake.In 0.5 times of stake footpath spacing, the resistance coefficient maximum, after the stake footpath of pile spacing above 3 times, resistance coefficient is less, and when the footpath of the stake above 4 times, a clump of piles is very weak for the influence of current, only is equivalent to single pile.But pile spacing is more little, washes away deeply more before the stake, and construction is also inconvenient, so from the protection effect, pile group self washes away and the construction aspect is considered, pile spacing directly is advisable with 3 times stake.Protection stake simultaneously is not restricted to four rows; its row's number can adjust according to the concrete river regime in section; adjusting principle is to guarantee that reaching water impact speed is lower than soft raft safety eroding velocity, four row's protection stakes generally is set can reaches the better protect effect.
As another optimization, described pile group is provided with the position makes soft raft and pile group sides adjacent be positioned at just outside the maximum scour hole in pile group rear end.This is because when current are excessive; can before and after it, all form scour hole to protecting the stake generation to wash away more greatly; river sand just scour hole backfill again when current weaken; so make soft raft and pile group sides adjacent be positioned at just outside the maximum scour hole in pile group lower end when pile group is provided with the position, then can avoid this scour hole that soft raft is impacted.The described position that specifically is provided with can be calculated according to following formula.
D
b＝1.4B
b 0.76 (1)
Each symbol implication is in this formula: D
bScour hole width (m) behind-clump of piles, B
bThe scour hole degree of depth (m) behind-clump of piles.
Can't learn under the parameter situation, between pile group and the soft raft distance general desirable about 5 meters comparatively suitable.
As further optimization, described pile group upper end is connected as a single entity.Like this, can make whole pile group hold together, strengthen the steadiness and the impact resistance of pile group greatly.During concrete enforcement, can adopt linking beam or cement panel that the pile group upper end is connected as a single entity, but linking beam or cement panel upper surface should be higher than the river design flood level.
In sum, than prior art, this method possesses following advantage:
1, adopted the compound mode of pile group and soft raft that the riverbank is protected in the inventive method; soft raft can protect the riverbed silt that closes on the place, riverbank not to be flushed away; pile group guarantees to arrive the river flow velocity of soft raft side in safe range simultaneously; and then guaranteed the safety of soft raft self; so possess the effective advantage of protection, be particularly suitable for that flow velocity section big, that oblique impact is many practices in fine sand type river.
2, the pile group in this method is not to stop current to pass through rigidly; but allow current after reducing flow velocity, can pass through therebetween; this with prior art in other as preventive means such as soft raft, sandbag, groynes in essence different are arranged; these existing preventive means all are to wish to isolate the contact of living between object to be protected and the current; tend to cause protection structure self to destroy, can not reach the protection purpose because of producing bigger washing away.And in this method, pile group belongs to permeable structure, current is played simultaneously the effect of dredging and cushioning; reduced washing away of pile group self on the one hand; guarantee the safety of structure self, significantly slowed down the water velocity behind the pile group on the other hand, protected the safety of riverbank or other protection object.
3, in this method, not only announce the method that adopts its buffering river of pile group, announced that also concrete pile group is provided with layout structure, can make that pile group is maximized to play the effect that slows down the river flow velocity, also farthest guaranteed pile group self steadiness simultaneously.
So in sum, it is respond well that this method possesses protection, is particularly suitable for the characteristics of implementing in fine sand type river.
The specific embodiment
The present invention is described in further detail below in conjunction with the specific embodiment.
The method on a kind of fine sand river pile group-soft raft complex protection riverbank is provided with soft raft protection structure along river alongshore earlier, and soft raft needs to lay geotextiles down and covers the riverbed face; Again outside described soft raft protection structure riverbed lateral edges; also being provided with the pile group that is made of four row's protection stakes protects; described soft raft protection extensibility of structure is the 12 meters distances in riverbed extremely under water; concrete square pile is adopted in the protection stake; its lower end is rooted in 12 meters of bottoms, riverbed makes it keep stable, and its upper end highly exceeds design water level.Adopt staggered mode in the pile group that is provided with between every campshed, clear distance is 3.0 times of stake footpaths between stake.Pile spacing in this scope can slow down effect preferably so that pile group reaches river speed, guarantees that the water velocity that reaches soft raft is lower than the soft raft safety speed.Simultaneously, the scour depth before and after the pile group is all little, and the stable described pile group that has guaranteed pile group self is provided with the position makes soft raft and pile group sides adjacent be positioned at just outside the maximum scour hole of pile group lower end.Described pile group upper end adopts cement beam or panel to connect, and the upper surface should be higher than river design standard flood level height.
Claims (4)
1. the method on fine sand river pile group-soft raft complex protection riverbank; comprise along river alongshore soft raft protection structure is set; it is characterized in that, outside described soft raft protection structure riverbed lateral edges, be provided with the pile group that constitutes by at least two row's protection stakes again and protect.
2. the method on fine sand as claimed in claim 1 river pile group-soft raft complex protection riverbank is characterized in that, the pile group of setting is made of four row's protection stakes, and clear distance is not more than 4 times stake footpath between it.
3. the method on fine sand as claimed in claim 1 river pile group-soft raft complex protection riverbank is characterized in that, described pile group is provided with the position makes soft raft and pile group sides adjacent be positioned at just outside the maximum scour hole in pile group rear end.
4. as the method on claim 1 or 2 or 3 or 4 described fine sand river pile group-soft raft complex protection riverbanks, it is characterized in that described pile group upper end is connected as a single entity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101424525A CN101824810B (en) | 2010-04-08 | 2010-04-08 | Method for protecting river bank by sand-river pile group and flexible mattresses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101424525A CN101824810B (en) | 2010-04-08 | 2010-04-08 | Method for protecting river bank by sand-river pile group and flexible mattresses |
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| Publication Number | Publication Date |
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| CN101824810A true CN101824810A (en) | 2010-09-08 |
| CN101824810B CN101824810B (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101424525A Expired - Fee Related CN101824810B (en) | 2010-04-08 | 2010-04-08 | Method for protecting river bank by sand-river pile group and flexible mattresses |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828489A (en) * | 2012-07-25 | 2012-12-19 | 中国水利水电科学研究院 | System for arranging piles to fix riverbed main stream |
| CN103603267A (en) * | 2013-11-21 | 2014-02-26 | 同济大学 | Protective device with height-variable sacrificing piles against local scours to bridge pier foundation |
| CN104213586B (en) * | 2014-09-18 | 2016-08-24 | 东南大学 | A kind of pile foundation scour safeguard procedures method |
| CN107090805A (en) * | 2017-02-07 | 2017-08-25 | 中国地质科学院探矿工艺研究所 | Method for protecting and reinforcing mud-rock flow sand blocking dam against scour |
| CN113094631A (en) * | 2021-04-16 | 2021-07-09 | 交通运输部天津水运工程科学研究所 | Large-range scouring pit optical fiber monitoring data processing method for end part of bank protection soft row body |
| CN114790716A (en) * | 2022-04-29 | 2022-07-26 | 华北水利水电大学 | Reservoir gate sand control method based on movable guide pile group |
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| CN2293594Y (en) * | 1997-04-30 | 1998-10-07 | 谢怀东 | Permeable breakwater pile foundation |
| CN1312416A (en) * | 2001-03-15 | 2001-09-12 | 南京市长江河道管理处 | Continuous prefabricated hinged concrete row drawing and depositing construction process |
| CN1372043A (en) * | 2001-02-27 | 2002-10-02 | 龚崇准 | Permeable pile type offshore dam |
| CN2698844Y (en) * | 2004-05-13 | 2005-05-11 | 长江航道规划设计研究院 | Soft raft tied with concrete block |
| CN2863884Y (en) * | 2005-12-16 | 2007-01-31 | 武汉绿洲凝石工程有限责任公司 | Thread connecting precast block soft row |
| CN2866593Y (en) * | 2006-07-25 | 2007-02-07 | 中国水利水电科学研究院 | System drainage combined anchorage structure for estuary soft body draining and protecting bank engineering |
| RU2338833C1 (en) * | 2007-01-11 | 2008-11-20 | Замир Галимович Ламердонов | Method of protection building against undermining of bank protection structures foundations |
| CN101581083A (en) * | 2009-06-12 | 2009-11-18 | 中交二航局第三工程有限公司 | Method for constructing composite river bottom protection with steel sheet piles and soft mattresses for artificial island |
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2010
- 2010-04-08 CN CN2010101424525A patent/CN101824810B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2293594Y (en) * | 1997-04-30 | 1998-10-07 | 谢怀东 | Permeable breakwater pile foundation |
| CN1372043A (en) * | 2001-02-27 | 2002-10-02 | 龚崇准 | Permeable pile type offshore dam |
| CN1312416A (en) * | 2001-03-15 | 2001-09-12 | 南京市长江河道管理处 | Continuous prefabricated hinged concrete row drawing and depositing construction process |
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| CN2863884Y (en) * | 2005-12-16 | 2007-01-31 | 武汉绿洲凝石工程有限责任公司 | Thread connecting precast block soft row |
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| RU2338833C1 (en) * | 2007-01-11 | 2008-11-20 | Замир Галимович Ламердонов | Method of protection building against undermining of bank protection structures foundations |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828489A (en) * | 2012-07-25 | 2012-12-19 | 中国水利水电科学研究院 | System for arranging piles to fix riverbed main stream |
| CN102828489B (en) * | 2012-07-25 | 2015-07-22 | 中国水利水电科学研究院 | System for arranging piles to fix riverbed main stream |
| CN103603267A (en) * | 2013-11-21 | 2014-02-26 | 同济大学 | Protective device with height-variable sacrificing piles against local scours to bridge pier foundation |
| CN104213586B (en) * | 2014-09-18 | 2016-08-24 | 东南大学 | A kind of pile foundation scour safeguard procedures method |
| CN107090805A (en) * | 2017-02-07 | 2017-08-25 | 中国地质科学院探矿工艺研究所 | Method for protecting and reinforcing mud-rock flow sand blocking dam against scour |
| CN113094631A (en) * | 2021-04-16 | 2021-07-09 | 交通运输部天津水运工程科学研究所 | Large-range scouring pit optical fiber monitoring data processing method for end part of bank protection soft row body |
| CN113094631B (en) * | 2021-04-16 | 2022-03-04 | 交通运输部天津水运工程科学研究所 | Large-range scouring pit optical fiber monitoring data processing method for end part of bank protection soft row body |
| CN114790716A (en) * | 2022-04-29 | 2022-07-26 | 华北水利水电大学 | Reservoir gate sand control method based on movable guide pile group |
| CN114790716B (en) * | 2022-04-29 | 2023-09-01 | 华北水利水电大学 | Reservoir barrage sand treatment method based on movable diversion pile group |
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| CN101824810B (en) | 2012-06-27 |
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Granted publication date: 20120627 Termination date: 20130408 |