CN104153320A - Method for regulating pebble shoal in intensified low-flow branching layout - Google Patents
Method for regulating pebble shoal in intensified low-flow branching layout Download PDFInfo
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- CN104153320A CN104153320A CN201410355812.8A CN201410355812A CN104153320A CN 104153320 A CN104153320 A CN 104153320A CN 201410355812 A CN201410355812 A CN 201410355812A CN 104153320 A CN104153320 A CN 104153320A
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Abstract
The invention discloses a method for regulating a pebble shoal in intensified low-flow branching layout. According to the method, a straight channel is opened to air traffic, a dredging and damming hybrid regulation measure is taken, a layout wherein a longitudinal dike and a spur dike are built on a low channel bar to intensify low-flow branching, flow returning is promoted, and the straight channel is moderately narrowed; a water damage control measure, where interlock blocks placed at the head of the middle longitudinal dike and the head of the spur dike under severe flow scouring are used for surface covering by coping, is taken. The method has the advantages that the longitudinal dike and the spur dike are bit on the channel bar, bed load can be driven to deposit on the channel bar, the channel bar is raised and widened, the river regime feature of the low-flow branching is intensified, flow returning is promoted, and stability of a low-flow channel is benefited; tests on movable bed models in straight channel recommendation schemes for Shenbeizui and Tonggutan show that the joint application of channeling and regulating structures for intensifying the channel bar branching leads to a good regulation effect, the structure of the head of the spur dike in which the interlock blocks are used for surface covering by coping is adopted, overall stability of a dam is enhanced, and the dam is well stable.
Description
Technical field
The invention belongs to waterway regulation research field, relate in particular to a kind of pebble shoal regulation method that low water divides branch of a river general layout of strengthening.
Background technology
Upper Yangtze River god back of the body mouth dangerous shoal is positioned near Mi Tuo town, Luxian County, Sichuan Province, test section navigation channel mileage 876～868km, and plane configuration is the later sharp turn of approximately 110 °.Changeover portion right bank is the smooth open fossil river bed alluvial flat of wide approximately 1000～1500m.In low water riverbank have more the laccolites such as a small bay in a river cliff, nine dragons, pig stone, frog stone, low flow channel bundle is narrow below the god's back of the body mouth convex mouth of import left bank, the about 600m of oued groove width in the section of beach, the weighing lever moraine that the middle of the river is about 1200m is divided into left and right two grooves by water channel.Left groove is crooked Cha Dao, and import is curved narrow, and river bed longitudinal gradient rises and falls large; Middle hypomere is comparatively narrow dark, the about 150m of withered phase water surface width, and dark about 10m navigates; Regulation front left groove is low water boat groove, and maintenance dimension of channel is 220m * 40m * 1.8m.Right groove is comparatively straight, the wide about 260m of the water surface in dry season; Import river bed is 9.5% steep anxious adverse slope, and middle hypomere river bed profile is more smooth-going, and average river bed longitudinal gradient is 1.35 ‰; Epimere boat 1.7m left and right deeply only in right groove, there are frog stone and underwater reefs in entrance, on navigation basal plane, opens the navigation or air flight during the 2m depth of water.
< < navigation channel handbook > > points out while summing up the waterway regulation experience that mountain stream divides distributary section, and regulation Cha Dao should select to develop Cha Dao or stable and be conducive to navigate by water Cha road; Before crooked Cha Dao regulation, multidigit is low water navigation Cha Dao, while selecting it to renovate, training works amount is relatively little, and renovation scheme is relatively little on the impact of river gesture, risk is also less, general recommendations selects crooked Cha Dao to renovate, therefore god carries on the back mouth, bronze drum beach also all selects the left branch of a river to renovate in last century end.But crooked Cha Dao is subject to the limitation of river potential condition, increase comparatively difficulty of bend radius, the poor stability of grooving.God's back of the body mouth import bending is 220m only, meet the requirement of 560m minimum bending radius, must arrange boat groove at moraine brain; Increase You Cao stage casing, bronze drum beach bend radius, the groove that low water must be navigated is arranged in Qi Chi edge, the middle of the river; Above-mentioned trenching area is in sediment transport band position, and in crooked branch of a river road after epimere flood a little less than Flood Plain Flow dispersing water flow scouring capability, grooving is also easily back-silted, and channel maintenance engineering quantity is large.As nineteen ninety, navigation channel department once carries on the back the left groove in mouth beach to god and renovates, and builds longitudinal dike stop crossing current at weighing lever moraine, dredges left groove import to increase bend radius, but because left groove import is Sediment Transport band present position, the boat groove shallow boat that hinders of becoming silted up again.
Summary of the invention
The object of the present invention is to provide a kind of pebble shoal regulation method that low water divides branch of a river general layout of strengthening, be intended to improve the renovating effect that changeover portion low water divides the pebble shoal of branch of a river general layout.
The present invention is achieved in that and takes dredging and the management measure of building a dam and combining, and opens up the straight trough navigation that changeover portion low water divides branch of a river pebble shoal; On short channel bar, build the general layout that longitudinal dike and tooth dam strengthening low water divide the branch of a river, promote current return groove and suitably restraint narrow straight trough, be conducive to the stable of groove that navigate; At the strong middle of the river longitudinal dike abutment of current top-lashed action, tooth dam abutment, take to turn round the bear down on one erosion protection measure of mask of king's block.
Further, the direction of described longitudinal dike should be consistent with beach rampart line trend, and abutment position should be positioned at downstream position of left and right groove split point, reduces the increase that straight trough divides husky amount simultaneously as far as possible.
Further, described tooth dam dam root and middle of the river longitudinal dike join, and dam body length, number meet the requirement of controlling straight trough regulation line.
Further, for further increasing the stability of straight trough, also can, on the basis of above-mentioned engineering measure, in curved groove, arrange that ground sills increases straight trough shunt volume.
Strengthening low water of the present invention divides the pebble shoal regulation method of branch of a river general layout, builds longitudinal dike and tooth dam on channel bar, can promote bed load to deposit on channel bar, channel bar aggradation broadening, strengthen the river gesture feature that low water divides the branch of a river, promoted current return groove and suitably restraint narrow straight trough, be conducive to the stable of groove that navigate.The movable-bed model test of the straight trough suggested design on god's back of the body mouth, bronze drum beach shows, grooving divides the regulating structure of the branch of a river to match with strengthening channel bar, obtained good renovating effect, middle of the river longitudinal dike and tooth dam abutment take to turn round the bear down on one structure of mask of king's block, further strengthen the resistance to overturning of dam body, Remedial Practice shows, dam stability is good.
Accompanying drawing explanation
Fig. 1 is that the god that the embodiment of the present invention provides carries on the back the right groove suggested design of mouth layout schematic diagram;
Fig. 2 is the bronze drum beach left groove renovation scheme layout schematic diagram that the embodiment of the present invention provides.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The present invention is achieved in that and takes dredging and the management measure of building a dam and combining, and opens up the straight trough navigation that changeover portion low water divides branch of a river pebble shoal; On short channel bar, build the general layout that longitudinal dike and tooth dam strengthening low water divide the branch of a river, promote current return groove and suitably restraint narrow straight trough, be conducive to the stable of groove that navigate; At the strong middle of the river longitudinal dike abutment of current top-lashed action, tooth dam abutment, take to turn round the bear down on one erosion protection measure of mask of king's block.
The direction of longitudinal dike should be consistent with beach rampart line trend, and abutment position should be positioned at downstream position of left and right groove split point, reduces the increase that straight trough divides husky amount simultaneously as far as possible.
Tooth dam dam root and middle of the river longitudinal dike join, and dam body length, number meet the requirement of controlling straight trough regulation line.
For further increasing the stability of straight trough, also can, on the basis of above-mentioned engineering measure, in curved groove, arrange that ground sills increases straight trough shunt volume.
As shown in Figure 1, on the right groove of god's back of the body mouth, near the frog stone of stage casing, low water river surface is relatively wide, movable bed test shows at upper stage casing grooving siltation volume relatively large, therefore the 3 short groynes in road are arranged in suggested design left side, stage casing on right groove, import arranges that 1 road bend-ended spur dike is with the sand surfing of bundle water.
As shown in Figure 2, the about 300m of the withered phase river width in bronze drum beach, the about 580m of bronze drum Zi Qian district river width.On the moraine of diving, build the dam of being in a good mood, 600m the Changjiang river, 2m in height of dam design water level, regulates shunt volume, and rule are along left groove current; 3 tooth dams are built in the left side of longitudinal dike in the middle of a river simultaneously, and dam length is respectively 55m, 46m, 40m from top to bottom, and 2m in height of dam design water level, to increase the flow velocity of left groove dredged area epimere, reduces silt and back-silts.
Although above-mentioned, by reference to the accompanying drawings the specific embodiment of the present invention is described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that performing creative labour can make or distortion still within protection scope of the present invention.
Claims (4)
1. strengthen the pebble shoal regulation method that low water divides branch of a river general layout for one kind, it is characterized in that, described strengthening low water divides the pebble shoal regulation method of branch of a river general layout to open up straight trough navigation, take dredging and the management measure of building a dam and combining, on short channel bar, build the general layout that longitudinal dike and tooth dam strengthening low water divide the branch of a river, promote current to return groove and restraint narrow straight trough; At the strong middle of the river longitudinal dike abutment of current top-lashed action, tooth dam abutment, take to turn round the bear down on one erosion protection measure of mask of king's block.
2. strengthening low water as claimed in claim 1 divides the pebble shoal regulation method of branch of a river general layout, it is characterized in that, the direction of described longitudinal dike should be consistent with beach rampart line trend, and abutment position should be positioned at downstream position of left and right groove split point, reduces the increase that straight trough divides husky amount simultaneously as far as possible.
3. strengthening low water as claimed in claim 1 divides the pebble shoal regulation method of branch of a river general layout, it is characterized in that, described tooth dam dam root and middle of the river longitudinal dike join, and dam body length, number meet the requirement of controlling straight trough regulation line.
4. strengthening low water as claimed in claim 1 divides the pebble shoal regulation method of branch of a river general layout, it is characterized in that, for increasing the stability of straight trough, also can in curved groove, arrange that ground sills increases straight trough shunt volume.
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| CN201410355812.8A CN104153320A (en) | 2014-07-24 | 2014-07-24 | Method for regulating pebble shoal in intensified low-flow branching layout |
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| CN201410355812.8A CN104153320A (en) | 2014-07-24 | 2014-07-24 | Method for regulating pebble shoal in intensified low-flow branching layout |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105421288A (en) * | 2015-11-20 | 2016-03-23 | 中国电建集团贵阳勘测设计研究院有限公司 | Large reservoir basin reservoir silt beach sand sluicing structure and construction method thereof |
| CN109797704A (en) * | 2019-04-03 | 2019-05-24 | 交通运输部天津水运工程科学研究所 | A kind of mixed type ecology makes beach engineering |
| CN109868785A (en) * | 2019-04-03 | 2019-06-11 | 交通运输部天津水运工程科学研究所 | A kind of mixing dam body permeable ecology makes beach engineering |
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| US5857805A (en) * | 1994-05-05 | 1999-01-12 | Chappell; Derrald H. | Flow modification apparatus, system, and method |
| JP2005264681A (en) * | 2004-03-22 | 2005-09-29 | Chugoku Electric Power Co Inc:The | Method of discharging sediment accumulated in water reservoir |
| CN101824809A (en) * | 2010-04-22 | 2010-09-08 | 重庆交通大学 | Large-gradient gravel river bank protective structure and river washout-resistant controlling method thereof |
| CN103898867A (en) * | 2014-03-13 | 2014-07-02 | 重庆交通大学 | Spur dike, for inland waterway improvement, not connected with embankment |
| CN103898866A (en) * | 2014-03-13 | 2014-07-02 | 重庆交通大学 | Method for regulating straight channel of sand cobble bifurcated shoal of transition section |
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2014
- 2014-07-24 CN CN201410355812.8A patent/CN104153320A/en active Pending
Patent Citations (5)
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| US5857805A (en) * | 1994-05-05 | 1999-01-12 | Chappell; Derrald H. | Flow modification apparatus, system, and method |
| JP2005264681A (en) * | 2004-03-22 | 2005-09-29 | Chugoku Electric Power Co Inc:The | Method of discharging sediment accumulated in water reservoir |
| CN101824809A (en) * | 2010-04-22 | 2010-09-08 | 重庆交通大学 | Large-gradient gravel river bank protective structure and river washout-resistant controlling method thereof |
| CN103898867A (en) * | 2014-03-13 | 2014-07-02 | 重庆交通大学 | Spur dike, for inland waterway improvement, not connected with embankment |
| CN103898866A (en) * | 2014-03-13 | 2014-07-02 | 重庆交通大学 | Method for regulating straight channel of sand cobble bifurcated shoal of transition section |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105421288A (en) * | 2015-11-20 | 2016-03-23 | 中国电建集团贵阳勘测设计研究院有限公司 | Large reservoir basin reservoir silt beach sand sluicing structure and construction method thereof |
| CN109797704A (en) * | 2019-04-03 | 2019-05-24 | 交通运输部天津水运工程科学研究所 | A kind of mixed type ecology makes beach engineering |
| CN109868785A (en) * | 2019-04-03 | 2019-06-11 | 交通运输部天津水运工程科学研究所 | A kind of mixing dam body permeable ecology makes beach engineering |
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