CN106120640A - A kind of construction method preventing and treating mountain stream bridge foundation washout - Google Patents
A kind of construction method preventing and treating mountain stream bridge foundation washout Download PDFInfo
- Publication number
- CN106120640A CN106120640A CN201610493868.9A CN201610493868A CN106120640A CN 106120640 A CN106120640 A CN 106120640A CN 201610493868 A CN201610493868 A CN 201610493868A CN 106120640 A CN106120640 A CN 106120640A
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- China
- Prior art keywords
- bridge foundation
- construction method
- mountain stream
- check dam
- washout
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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
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Revetment (AREA)
Abstract
The invention discloses a kind of construction method preventing and treating mountain stream bridge foundation washout. the method, particularly as follows: build check dam on the river course in bridge foundation downstream, forms river energy dissipating reduction of speed retention of excessive fluid pond.Check dam construction method is: squeeze at least 1 row's spud pile along river cross-section in riverbed, and riverbed surface is risen out in stake, at spud pile upstream or middle water-retaining structure of placing, formation check dam.Compared with existing mountain stream bridge foundation washout prevention and controls, its construction is simple, it is only necessary to building one check dam, cost is substantially reduced.And, the arranging of check dam can make to be washed the riverbed near the bridge foundation of erosion and back-silt, and gradually recovers bridge foundation buried depth, thus fundamentally solves bridge foundation washout problem.
Description
Technical field
The invention belongs to engineering construction field, be specifically related to a kind of construction party preventing and treating mountain stream bridge foundation washout
Method.
Background technology
Flood is the main cause causing bridge collapse to the souring of bridge pier, and in mountain stream, this phenomenon is outstanding especially
For significantly.Mountain stream bridge foundation washout problem has many design and construction methods, and design construction standard also has respective specified, main
The conditions such as flow to be considered, river width, riverbed geology, but its design calculating erosion quantity is the most inaccurate.At present for built
Mountain stream bridge foundation washout prophylactico-therapeutic measures be generally as follows: 1. for sandy bed river bridge location take upstream arrange intercept water
Wall, downstream arranges ladder of cascades wall, reinforces the method completely spreading mortar flag stone in the middle of bridge opening simultaneously.2. abutment is in cobble
The reinforcement measure of sedimentary generally uses the method for substrate grouting methol, sets up mould and pour concrete around basis, will the most again
Grating cobble is backfilling into basic platform top, pours the intensity of concrete when reaching to a certain degree, it is being carried out mud jacking before surrounding
Process.3. bridge location be in transition riverbed basis situation generally by dredging upper river make water (flow) direction change, and then solution
Stream the problem washing away basis.But said method all cannot fundamentally solve the flood souring to bridge pier, is only capable of adding
Gu preventing and treating in a period of time after, As time goes on its effect can be more and more weak.
Summary of the invention
It is an object of the invention to solve problems of the prior art, and a kind of preventing and treating mountain stream bridge base is provided
The construction method that plinth washes away.
Do not illustrate how from mechanical concept for existing mountain stream bridge foundation washout problem to prevent and treat river, mountain area comprehensively
Stream bridge foundation washout risk problem, according to strokes law MV=Ft, uses energy dissipating reduction of speed retention of excessive fluid pond to change flow velocity, flushing time
Etc. condition, reach to prevent and treat the purpose of mountain stream bridge foundation washout.Concrete technical scheme of the present invention is as follows:
The construction method of preventing and treating mountain stream bridge foundation washout, particularly as follows: build on the river course in bridge foundation downstream
Check dam, forms river energy dissipating reduction of speed retention of excessive fluid pond.
The theoretical basis of institute of the present invention foundation is as follows:
The first step is found according to strokes law MV=Ft affects the key factor of mountain stream bridge foundation washout；
The formula that washes away in unit length river can be set up according to strokes law MV=Ft:
Q × γ × V=F × t (1.1)
Wherein Q is unit length river discharge；γ is the unit weight of water；V is river flow；F is channel scour power；T is single
Bit length river discharge flushing time.
In formula (1.1), flow Q is constant；Flow velocity V is controllable；Flushing time t can time delay, channel scour
Power F is changeable；And the condition such as flow, riverbed geology cannot change.I.e.
F=(Q × γ × V)/t (1.2)
From (1.2): use engineering measure to arrange check dam and can reduce flow velocity V, extend flushing time t, so that it may subtract
Few channel scour power F.
Above-mentioned base case can use following optimal way to realize.
As preferably, described check dam construction method is: squeeze at least 1 row's spud pile along river cross-section in riverbed,
And stake rises out riverbed surface, in spud pile upstream or middle place water-retaining structure, form check dam.This check dam is easy to execute
Work, cost is relatively low.Water-retaining structure preferably employs as materials such as concrete precast block, block stone or fence.
Further, described spud pile is positioned at bridge foundation downstream 10～20m, and check dam is higher than riverbed 0.8～1m.Should
Design can realize the back-silting, from the problem of long-range upper solution foundation scouring of riverbed near bridge foundation.
Further, described spud pile is precast reinforced concrete pile, to reduce cost.
Further, the described spacing between spud pile is 5～6m.
Further, for being washed the bridge foundation of erosion, need damage part is repaiied after constructing check dam
Multiple.
The present invention, according to strokes law, uses and builds energy dissipating reduction of speed retention of excessive fluid pond on the river course in bridge foundation downstream, to change
Become the conditions such as bridge foundation adnexa flow velocity, flushing time, reach to prevent and treat the purpose of mountain stream bridge foundation washout.With existing
Mountain stream bridge foundation washout prevention and controls is compared, and its construction is simple, it is only necessary to building one check dam, cost is substantially reduced.
And, the arranging of check dam can make to be washed the riverbed near the bridge foundation of erosion and back-silt, and gradually recovers bridge foundation and buries
Put the degree of depth, thus fundamentally solve bridge foundation washout problem.
Accompanying drawing explanation
Fig. 1 is that in embodiment, river bridge foundation washout and protection arrange schematic diagram.
Detailed description of the invention
With detailed description of the invention the present invention it is further elaborated below in conjunction with the accompanying drawings and illustrates.In the present invention, each is implemented
The technical characteristic of mode, on the premise of not colliding with each other, all can carry out respective combination.
As it is shown in figure 1, for a certain mountain stream bridge foundation being washed erosion, it is used and reinforces preventing and treating as follows
Construction:
(1) in the position of bridge foundation downstream 15m, set 1～2 row's 10m length precast reinforced concrete piles, squeeze into riverbed
9m, as the spud pile of check dam.Spud pile is arranged along river channel cross section.
(2) at spud pile (spacing 5-6m) upstream or middle placement 1m3Concrete precast block (or block stone, fence), is higher than
Riverbed 1m, builds the high river check dam of 1m.Find by building check dam through substantial amounts of test, can be in check dam upstream
Forming river energy dissipating reduction of speed retention of excessive fluid pond, current flow velocity near bridge foundation slows down.Thus reaching to reduce flow velocity V, prolongation is washed away
The effect of time t, may be reduced by channel scour power F according to theorem of impulse.Further, find to arrange height to arrive by research
About 1m, can make mud and deposit back-silt under hydraulic action to the riverbed of base attachment, gradually recover bridge foundation
Buried depth.
(3) for being washed the bridge foundation of erosion, after constructing check dam, again in the middle part of repair bridge base water
Point, complete whole preventing and treating construction.
It addition, show through overtesting, for different river courses, the position that arranges of check dam can be in the range of 10～20m
It is adjusted；The height of check dam can also be finely adjusted according to hydraulics, is located substantially between 0.8～1.0m, and height is spent
Height easily blocks current, and the most too low effect of back-silting is poor.Through practical observation, for mountain stream, check dam is arranged at bridge
The position in downstream, beam basis 10～20m, check dam height 0.8～1.0m between time, can make current vortex backflow intend
Static position is about near bridge foundation so that effect of back-silting is preferable.
Embodiment described above is the one preferably scheme of the present invention, and so it is not intended to limiting the invention.Have
Close the those of ordinary skill of technical field, without departing from the spirit and scope of the present invention, it is also possible to make various change
Change and modification.The technical scheme that the most all modes taking equivalent or equivalent transformation are obtained, all falls within the guarantor of the present invention
In the range of protecting.
Claims (7)
1. the construction method preventing and treating mountain stream bridge foundation washout, it is characterised in that on the river course in bridge foundation downstream
Build check dam, form river energy dissipating reduction of speed retention of excessive fluid pond.
2. the construction method preventing and treating mountain stream bridge foundation washout as claimed in claim 1, it is characterised in that described blocks
Dam construction method is: squeeze at least 1 row's spud pile along river cross-section in riverbed, and riverbed surface is risen out in stake, fixing
Stake upstream or middle water-retaining structure of placing, formation check dam.
3. the construction method preventing and treating mountain stream bridge foundation washout as claimed in claim 2, it is characterised in that described consolidates
Fixed pile is in bridge foundation downstream 10～20m, and check dam is higher than riverbed 0.8～1m.
4. the construction method preventing and treating mountain stream bridge foundation washout as claimed in claim 2, it is characterised in that described consolidates
Determining stake is precast reinforced concrete pile.
5. the construction method preventing and treating mountain stream bridge foundation washout as claimed in claim 2, it is characterised in that described gear
Water-bound is concrete precast block, block stone or fence.
6. the construction method preventing and treating mountain stream bridge foundation washout as claimed in claim 2, it is characterised in that described consolidates
Determining the spacing between stake is 5～6m.
7. the as claimed in claim 2 construction method preventing and treating mountain stream bridge foundation washout, it is characterised in that for by
Wash away the bridge foundation of erosion, need damage part is repaired after constructing check dam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610493868.9A CN106120640A (en) | 2016-06-29 | 2016-06-29 | A kind of construction method preventing and treating mountain stream bridge foundation washout |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610493868.9A CN106120640A (en) | 2016-06-29 | 2016-06-29 | A kind of construction method preventing and treating mountain stream bridge foundation washout |
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| Publication Number | Publication Date |
|---|---|
| CN106120640A true CN106120640A (en) | 2016-11-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610493868.9A Pending CN106120640A (en) | 2016-06-29 | 2016-06-29 | A kind of construction method preventing and treating mountain stream bridge foundation washout |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829411A (en) * | 2017-11-08 | 2018-03-23 | 甘肃省科学院地质自然灾害防治研究所 | The underground erosion control wall construction of trraning pole is set |
| CN112211164A (en) * | 2020-10-20 | 2021-01-12 | 同济大学 | Novel debris flow pile group type blocking structure and method |
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|---|---|---|---|---|
| US20040265060A1 (en) * | 2001-10-26 | 2004-12-30 | Lee Keun-Hee | Method for constructing scour protection of bridge and stabilization of stream bed using block mat |
| CN102286961A (en) * | 2011-07-11 | 2011-12-21 | 合肥工业大学 | Overflow dam for waste tires |
| CN103526721A (en) * | 2013-10-29 | 2014-01-22 | 中国水电顾问集团成都勘测设计研究院有限公司 | Permeable spur dike with pile foundations |
| CN103898867A (en) * | 2014-03-13 | 2014-07-02 | 重庆交通大学 | Spur dike, for inland waterway improvement, not connected with embankment |
| CN104213586A (en) * | 2014-09-18 | 2014-12-17 | 东南大学 | Pile foundation scour protection measure method |
| CN205171469U (en) * | 2015-09-07 | 2016-04-20 | 四川省华地建设工程有限责任公司 | Mud -rock flow flow blocking dam scour protection dissipation structure |
-
2016
- 2016-06-29 CN CN201610493868.9A patent/CN106120640A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| US20040265060A1 (en) * | 2001-10-26 | 2004-12-30 | Lee Keun-Hee | Method for constructing scour protection of bridge and stabilization of stream bed using block mat |
| CN102286961A (en) * | 2011-07-11 | 2011-12-21 | 合肥工业大学 | Overflow dam for waste tires |
| CN103526721A (en) * | 2013-10-29 | 2014-01-22 | 中国水电顾问集团成都勘测设计研究院有限公司 | Permeable spur dike with pile foundations |
| CN103898867A (en) * | 2014-03-13 | 2014-07-02 | 重庆交通大学 | Spur dike, for inland waterway improvement, not connected with embankment |
| CN104213586A (en) * | 2014-09-18 | 2014-12-17 | 东南大学 | Pile foundation scour protection measure method |
| CN205171469U (en) * | 2015-09-07 | 2016-04-20 | 四川省华地建设工程有限责任公司 | Mud -rock flow flow blocking dam scour protection dissipation structure |
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| 伊廷军: "采用拦沙坝防护的浅基桥梁墩台局部冲刷研究", 《水土保持研究》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829411A (en) * | 2017-11-08 | 2018-03-23 | 甘肃省科学院地质自然灾害防治研究所 | The underground erosion control wall construction of trraning pole is set |
| CN112211164A (en) * | 2020-10-20 | 2021-01-12 | 同济大学 | Novel debris flow pile group type blocking structure and method |
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Application publication date: 20161116 |
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| RJ01 | Rejection of invention patent application after publication |