CN102162227B - Underwater slope backing method of bulky sand filled geotechnical pillow bags - Google Patents
Underwater slope backing method of bulky sand filled geotechnical pillow bags Download PDFInfo
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- CN102162227B CN102162227B CN2011100494262A CN201110049426A CN102162227B CN 102162227 B CN102162227 B CN 102162227B CN 2011100494262 A CN2011100494262 A CN 2011100494262A CN 201110049426 A CN201110049426 A CN 201110049426A CN 102162227 B CN102162227 B CN 102162227B
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Abstract
The invention relates to an underwater slope backing method of bulky sand filled geotechnical pillow bags. The method comprises the following operation steps of: 1, measurement of an underwater bank slope; 2, soil characteristic investigation of the underwater bank slope; 3, technical parameter determination and preparation of the geotechnical pillow bags; and 4, sand filling and sinking of the bulky sand filled geotechnical pillow bags. By the method, slope cutting is avoided, the bank shoal of certain width is reserved, and stability and safety of a river dike can be effectively improved; land acquisition is reduced, and the project investment can be greatly reduced; and the bulky sand filled geotechnical pillow bags have good extension and deformation capacities in the longitudinal and transverse directions, are combined tightly with the underwater irregular bank slope after being laid in place, have large volume, heavy dead weight, good stability and good slope backing treatment effect, and create conditions for wide application of a new composite geotextile software row bank protection technology in river bank collapse treatment projects.
Description
Technical field
The invention belongs to river bank collapse and administer the bank protection work technical field in the engineering, relate to the big volume of composite geotextile soft raft shore protection and fill sand worker pillowcase and fill up sloping process under water.
Background technology
Administer in the engineering at river bank collapse; It is frequent day by day to use composite geotextile soft raft shore protection technology in recent years; According to the Changjiang river, Zhujiang River basin relevant soft raft bank protection work project test experience; Arranging the gradient under water and should delaying in 1:2.5～1:3.0 of soft raft, also roughly smooth-going along the water (flow) direction bank slope, conventional way is arranging before, precipitous offshore slope to be cut the slope processing.But for most of river bank collapses, because collapse on the bank develops before administering year after year, cause offshore slope precipitous, seashore waterborne is narrow, as cuts the slope and handle, and the wide beach of then only 30～50m also will thoroughly be cut, and the utmost point is unfavorable for the stability and safety of river dike.
Therefore propose, before laying soft raft, heavy amplification volume fills sand worker pillowcase to be handled offshore slope abrupt slope section pad slope, influences the embankment stability and safety to avoid the cutting slope.
Summary of the invention
Promptly before arranging, precipitous offshore slope is cut the problem that influences the embankment stability and safety that existence is handled on the slope in order to overcome prior art, the present invention provides a kind of big volume to fill sand worker pillowcase and fills up sloping process under water.
The concrete operating process of the present invention is following:
1, offshore slope measurement: should carry out the offshore slope section survey before the construction, section spacing is generally 10～20m, and a local scour seriously slope section section spacing selects lower limit, for filling up the slope layout under water basic data is provided; To the abrupt slope section, the heavy volume that amplifies fills the processing of sand worker pillowcase pad slope, and offshore slope is delayed in 1:1.75～1:3.0 than the rule and the gradient, divides zone, pad slope, the heavy pillowcase side's amount of putting of calculating according to the section survey achievement; Seashore keeps 30～50 meters of width, is used to arrange bank shoulder framework anchor system, guarantees that the bank protection work resistance to overturning is good;
2, offshore slope soil property prospecting: should carry out the offshore slope geological mapping before the construction, all should arrange geological section, investigate thoroughly earth formation and soil property at Parallel to the flow direction and Transverse to the flow direction; Fine sand, sandy loam great soil group bank slope, soil shear strength is low, erosion resistibility is poor, dashes or is prone to produce the side slope unstability during sudden drawdown at Ying Liuding, and then form collapse on the bank, is fit to the heavy volume that amplifies and fills sand worker pillowcase pad slope;
3, geotechnological pillowcase fabric technology parameters selection:
Looking the offshore slope gradient and adjustment needs the big volume of design to fill sand worker pillowcase size: length 6.0 m～10.0m, diameter of phi 0.6m～1.0m; And make one in geotechnological pillowcase centre position and fill Sha Kou, filling the sand mouth is the tubule bag of length 0.5 m diameter of phi 0.2m, conveniently to fill sand and to be easy to colligation; Geotechnique's pillowcase is manufactured completion by specialized factory;
According to bank slope soil property and river sand characteristic, select for use big volume to fill sand worker pillowcase fabric technology parameter.Generally rapid with drainage, filling work efficiency height is that principle is selected 170g/m for use
2～230g/m
2The woven cloth of polypropylene filament yarn, the woven cloth of polypropylene filament yarn its important technological parameters recommended value such as table 1.
Table 1 fills up the big volume in slope under water and fills sand worker pillowcase important technological parameters
4, big volume fills filling sand and sinking the process of knocking off of sand worker pillowcase: referring to Fig. 1.
(4.1) fill sand, the heavy construction equipment of putting
The construction capital equipment is dull and stereotyped barge (ship of jettisoninging); Dull and stereotyped barge hull location is vertical with the riverbank during construction; Leaning on the riverbank hinged erection space of one end at dull and stereotyped barge is 10m * 2m activity plate platform, platform front end both sides welded reinforcement draw ring, and every draw ring is connecting wire rope; Wire rope is striden and is walked around support, and the other end is connecting the hoist engine that is fixedly mounted on the dull and stereotyped barge;
(4.2) filling river sand construction
Filling large junk, to be arranged in the outboard side of jettisoninging flat against the ship of jettisoninging; Fill that the sand tube line is arranged on the ship of jettisoninging and straight as far as possible, geotechnological pillowcase is spread on the activity plate platform of the ship front end of jettisoninging, the activity plate platform is as filling the sand operating platform; Draining is smooth and easy, and the filling work efficiency is high; In big volume fills sand worker pillowcase two, execute respectively and fill by filling the sand mouth when filling sand, it is 70～80% that big volume fills sand worker pillowcase inland river sandfilling degree; Fill sand and finish, carry out colligation by manual pick with the polypropylene fibre reinforced bands at the tubule bag that fills the sand mouth and get final product making;
(4.3) pillowcase sinks and puts construction
Pillowcase is heavy puts construction, by bank far away to offshore by the zone of having delimited, pad slope with calculate heavy put pillowcase side's amount successively order carry out; Fill big volume that sand accomplishes and fill sand worker pillowcase and start wire rope synchronously through hoist engine, the control plate platform slowly tilts to the front lower place, guides big volume to fill that sand worker pillowcase is smooth-going to slip into that the heavy design assigned address that is put into gets final product in the water; Each regional pillowcase in piece pad slope sinks puts the construction end, is put into a situation by water inspection pillowcase is heavy under the diver, considers whether pillowcase quantity is augmented in the part.
Useful technique effect of the present invention embodies in the following areas:
1, effectively improves the stability and safety of river dike.The heavy volume that amplifies fills sand worker pillowcase to the processing of offshore slope abrupt slope section pad slope, avoids cutting the slope, has kept the seashore of certain width, can effectively improve the stability and safety of river dike.
2, reduce expropriation of land, save construction investment.Job practices is handled on the conventional slope of cutting under water, need move back and build dyke, also needs the square hydraulic reclamation of land acquisition conduct district under water, occupies the State owned land resource, and immigrant and compensation for land requisitioned height.The heavy volume that amplifies fills sand worker pillowcase to the processing of offshore slope abrupt slope section pad slope, has practiced thrift land resources, can reduce construction investment significantly.
3, create conditions for the application of soft raft shore protection new technology.Administer in the engineering at river bank collapse, traditional riprap protection is not because of protecting the development year after year of the uncontrollable collapse on the bank of soil; Soft raft shore protection new technology then has advantages such as the short silt of the soil of guarantor is effective, the shore protection resistance to overturning is good, should be able to widely popularize application.But soft raft shore protection new technology application requirements offshore slope is slow and smooth-going.Big volume fills sand worker pillowcase vertical, horizontal and all has the deformability that extends preferably; Heavy be put into behind the position should combine closely with irregular bank slope under water; Volume is big, from great, good stability; It is good to fill up sloping treatment effect, for condition has been created in the extensive use in river bank collapse improvement engineering of composite geotextile soft raft shore protection new technology.
Description of drawings
Fig. 1 fills up sloping process sketch map under water for the big volume of the present invention fills sand worker pillowcase.
Sequence number explanation among Fig. 1: 1-bank framework anchor system protected, 2-low water platform connector, 3-under water composite geotextile soft rafts row body; 4-offshore slope before administering, sand worker pillowcase is filled with big volume in 6-pad slope, 7-design low water level; 8-activity plate platform, 9-wire rope, 10-hoist engine; 11-generator, 12-dull and stereotyped barge, 13-fill the sand ship.
The specific embodiment
Below in conjunction with Fig. 1, the present invention's technology is done explanation further through case history.
Case history:
1, project profile
Referring to Fig. 1; It is domestic that Huaibei embankment Xin Jia gulf collapse on the bank section is positioned at the Wuhe County, Anhui Province, and this section of flowing through, Huaihe River is humping, and the collapse on the bank of Xin Jia gulf is positioned at first and meets the concave bank that the stream top dashes; River bed elevation-13.4m; Be the darkest section in master stream, a thousand li Huaihe River, the offshore slope gradient is between 1:1.15～1:4.1, and-8.0m elevation is just comparatively mild with descending slope.The bank slope soil layer construction is: 1. the layer sandy loam; 2. the heavy silt loam of layer mud matter flows and moulds～soft moulding; 3. heavy～middle silt loam is plastic; 4. detail sand, in close～closely knit.The bank slope soil property is: 1. layer, 2. layer intensity is lower, erosion resistibility is poor, and 2. layer soil has weak water permeability, be prone to produce the side slope unstability during sudden drawdown; 3. layer intensity is higher, and erosion resistibility is stronger; 4. layer intensity height but erosion resistibility is poor.
Because of meeting factor affecting such as Liu Dingchong, bank slope soil property erosion resistibility is poor, the riverbed is dark, along with the serious scour of underflow, the avalanche of the bank slope soil body, bank slope is more and more steeper, and the riverbed center line approaches the bank further, vicious circle.Riprap protection is carried out in infusion of financial resources year after year for many years; But because The water is deep and the current fast, offshore slope is steep, domatic upward jackstone can't be retained, the bank slope soil body can not get factors such as protection; Cause jackstone before the flood, collapse on the bank in flood season still, can not find jackstone behind the flood, the riprap protection effect is very little.Make collapse on the bank section in Xin Jia gulf become the collapse on the bank dangerous section of the most famous, the most strategically located and difficult of access, the refractory reason in master stream, Huaihe River.
2, big volume fills sand worker pillowcase and fills up sloping process under water
Through multi-scheme relatively, design adopts soft raft shore protection new technology that collapse on the bank section in Xin Jia gulf is administered.Because of offshore slope is precipitous and irregular, soft raft is laid difficulty; Seashore waterborne is narrow, implements to cut the slope and handles and influence the embankment stability and safety even need move back and build dyke, needs immigrant and land acquisition, the raising construction investment.Seminar it has been decided through consideration that before laying soft raft, the heavy volume that amplifies fills sand worker pillowcase to the processing of offshore slope abrupt slope section pad slope.
(1) carries out the offshore slope section survey, section spacing 10m;
(2) offshore slope geological mapping is arranged 4 geology vertical sections altogether at the littoral beach of Parallel to the flow direction, low water platform, sloping waist, the end, slope, arranges geologic cross section at Transverse to the flow direction spacing 50m, to investigate thoroughly earth formation and soil property;
(3) geotechnological pillowcase and fabric technology parameters selection thereof: according to offshore slope section survey achievement, design big volume and fill sand worker pillowcase and be of a size of two kinds of long 10.0 m, diameter of phi 1.0m and long 6.0m, diameter of phi 0.6m, adopt 230g/m respectively
2Woven cloth of polypropylene filament yarn and 170g/m
2The woven cloth of polypropylene filament yarn is made, and makes one in geotechnological pillowcase centre position and fill Sha Kou, and filling the sand mouth is the tubule bag of length 0.5 m, diameter of phi 0.2m, and two kinds of big volumes fill sand worker pillowcase and produced respectively by specialized factory and transport to the building site after making completion;
(4) filling river sand construction
The construction working ship is dull and stereotyped barge 12 (ship of jettisoninging), and dull and stereotyped barge 12 hulls location is vertical with the riverbank during construction.Leaning on the riverbank hinged erection space of one end at dull and stereotyped barge 12 is 10m * 2m activity plate platform 8; Activity plate platform 8 front end both sides welded reinforcement draw rings; Every draw ring is connecting wire rope 9, and wire rope 9 is striden and walked around support, and the other end is connecting the hoist engine 10 that is fixedly mounted on the dull and stereotyped barge;
Initial stage, geotechnological pillowcase adopted 230g/m when implementing
2The woven cloth of polypropylene filament yarn is made, and fills Sha Kou and is located at a bag position, and dull and stereotyped barge 12 leans on not installation activity plate platform 8 of riverbank one end, directly on the barge deck of boat, fills sand.The fabric drainage rate is slow during filling river sand, needs repeatedly fill again, also is difficult to satisfy 70～80% packing density requirements, and chiltern amount and construction speed are filled in influence;
Improving back operation optimized scheme is: geotechnological pillowcase adopts 170g/m
2The woven cloth of polypropylene filament yarn is made; Fill Sha Kou and be located at geotechnological pillowcase centre position, filling large junk 13, to be arranged in dull and stereotyped barge 12 (ship of the jettisoninging) outside flat against dull and stereotyped barge 12, fills that the sand tube line is arranged in that dull and stereotyped barge 12 (ship of jettisoninging) is gone up and straight as far as possible; Big volume is filled sand worker pillowcase 6 to be spread on the activity plate platform 8 of the ship front end of jettisoninging; Activity plate platform 8 is as filling the sand operating platform, and draining is smooth and easy, and the filling work efficiency is high; In big volume fills sand worker pillowcase two, execute respectively and fill by filling the sand mouth when filling sand, it is 70～80% that big volume fills sand worker pillowcase inland river sandfilling degree; After filling sand and finishing, will make with the polypropylene fibre reinforced bands by manual pick and to carry out colligation at the tubule bag that fills the sand mouth and get final product; The warp-wise breaking strength of polypropylene fibre reinforced bands>=13.5 kN/ bars;
(5) pillowcase sinks and puts construction
When the initial stage implements, by manual work big volume is filled sand worker pillowcase and roll and push the korneforos, exist that operating difficulties, pillowcase are heavy puts problems such as uncontrollable;
Improving back operation optimized scheme is: pillowcase is heavy puts construction, by bank far away to offshore by the zone of having delimited, pad slope with calculate heavy put pillowcase side's amount successively order carry out; Fill big volume that sand accomplishes and fill sand worker pillowcase 6 and start wire rope 9 synchronously through hoist engine 10, control plate platform 8 slowly tilts to the front lower place, guides big volume to fill that sand worker pillowcase 6 is smooth-going to slip into the heavy design assigned address that is put in the water; Each regional pillowcase in piece pad slope sinks puts the construction end, is put into a situation by water inspection pillowcase is heavy under the diver, considers whether pillowcase quantity is augmented in the part;
Big volume fills that sand worker pillowcase 6 is heavy puts end; Carry out again under water that bank framework anchor system 1 anchor pile static pressure is arranged, protected to composite geotextile soft raft row body 3 and reinforced concrete beam is built, low water platform connector 2 file leaders are embedding and the steel bar concrete platform is built etc., just accomplished whole construction operations of soft raft bank protection work;
Big volume fills the innovation that sand worker pillowcase fills up sloping process under water, has not only improved work efficiency, and is convenient in the heavy design assigned address that is put into of the geotechnological pillowcase of control, satisfies the sloping designing requirement of pad.
3, the effect after the employing process of the present invention
The big volume of employing process method construction of the present invention fills sand worker pillowcase and fills up the slope processing under water; Guaranteed that Huaibei embankment believes the successful implementation of tame reach soft raft bank protection work, avoided tradition to cut that the slope is handled and the Huaibei embankment that causes need move back and builds about 3.56km of dike line length and need removal house 2.79 ten thousand m
2, 1050 mu of resettlement population 930 people, land acquisition etc., saved engineering for Huaibei embankment stabilization works and amounted to 4,850 ten thousand yuan with immigrant's expropriation of land investment.Economic benefit and social benefit are very significantly.
Claims (4)
1. big volume fills sand worker pillowcase and fills up sloping process under water, it is characterized in that comprising following operating procedure:
(1), offshore slope is measured
Should carry out the offshore slope section survey before the construction, section spacing is 10～20m, and a local scour seriously slope section section spacing selects lower limit, for filling up the slope layout under water basic data is provided; To the abrupt slope section, the heavy volume that amplifies fills the processing of sand worker pillowcase pad slope, and making offshore slope is 1: 1.75～1: 3.0 than the rule and the gradient, divides zone, pad slope, the heavy pillowcase side's amount of putting of calculating according to the section survey achievement; Seashore keeps 30～50 meters of width, is used to arrange bank shoulder framework anchor system, guarantees that the bank protection work resistance to overturning is good;
(2), offshore slope soil property prospecting
Should carry out the offshore slope geological mapping before the construction, all should arrange geological section, investigate thoroughly earth formation and soil property at Parallel to the flow direction and Transverse to the flow direction; Fine sand, sandy loam great soil group bank slope, soil shear strength is low, erosion resistibility is poor, dashes or is prone to produce the side slope unstability during sudden drawdown at Ying Liuding, and then form collapse on the bank, is fit to the heavy volume that amplifies and fills sand worker pillowcase pad slope;
(3), geotechnological pillowcase technical data is confirmed and preparation
Big volume fills sand worker pillowcase size: length 6.0m～10.0m, and diameter Ф 0.6m～1.0m, the center is provided with fills Sha Kou, and the said sand mouth that fills is the tubule bag of making;
What (4), big volume filled sand worker pillowcase fills sand and heavy putting
(4.1) fill sand, the heavy construction equipment of putting
The construction capital equipment ship of jettisoninging is dull and stereotyped barge, and dull and stereotyped barge hull location is vertical with the riverbank during construction; Leaning on the riverbank hinged erection space of one end at dull and stereotyped barge is 10m * 2m activity plate platform; Activity plate platform front end both sides welded reinforcement draw ring; Every draw ring is connecting wire rope, and wire rope is striden and walked around support, and the other end is connecting the hoist engine that is fixedly mounted on the dull and stereotyped barge;
(4.2) filling river sand construction
Filling large junk, to be arranged in the outboard side of jettisoninging flat against the ship of jettisoninging; Fill that the sand tube line is arranged on the ship of jettisoninging and straight as far as possible, big volume is filled sand worker pillowcase spread on the activity plate platform of the ship front end of jettisoninging, the activity plate platform is as filling the sand operating platform; Draining is smooth and easy, and the filling work efficiency is high; In big volume fills sand worker pillowcase two, execute respectively and fill by filling the sand mouth when filling sand, it is 70～80% that big volume fills sand worker pillowcase inland river sandfilling degree; Fill sand and finish, tighten the tubule bag that fills the sand mouth with binding strap;
(4.3) pillowcase sinks and puts construction
Pillowcase is heavy puts construction, by bank far away to offshore by the zone of having delimited, pad slope with calculate heavy put pillowcase side's amount successively order carry out; Fill big volume that sand accomplishes and fill sand worker pillowcase and start wire rope synchronously through hoist engine, the control plate platform slowly tilts to the front lower place, guides big volume to fill that sand worker pillowcase is smooth-going to slip into that the heavy design assigned address that is put into gets final product in the water; Each regional pillowcase in piece pad slope sinks puts the construction end, is put into a situation by water inspection pillowcase is heavy under the diver, considers whether pillowcase quantity is augmented in the part.
2. big volume according to claim 1 fills sand worker pillowcase and fills up sloping process under water; It is characterized in that: according to bank slope soil property and river sand characteristic; With drainage rapidly, filling work efficiency height be principle to select the woven cloth of polypropylene filament yarn for use be the material that big volume fills sand worker pillowcase, the woven cloth technical data of polypropylene filament yarn is following:
Quality 170～230g/m
2, warp-wise breaking strength>=2000N/5cm, warp-wise elongation at break≤35%, broadwise breaking strength>=1800N/5cm, broadwise elongation at break≤30%, the trapezoidal tearing brute force>=650N of warp-wise, the trapezoidal tearing brute force>=650N of broadwise, bursting strength>=3750N, effective aperture O
95≤0.08～0.2mm, vertical transmission coefficient>=0.001cm/s.
3. big volume according to claim 1 fills sand worker pillowcase and fills up sloping process under water, it is characterized in that: said big volume fills the tubule bag that the sand mouth is the length 0.5m diameter Ф 0.2m that makes at sand worker pillowcase middle part, conveniently fills sand and is easy to colligation.
4. big volume according to claim 1 fills sand worker pillowcase and fills up sloping process under water, it is characterized in that: said binding strap is the polypropylene fibre reinforced bands, the warp-wise breaking strength >=13.5kN/ bar of polypropylene fibre reinforced bands.
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| CN2011100494262A CN102162227B (en) | 2011-03-02 | 2011-03-02 | Underwater slope backing method of bulky sand filled geotechnical pillow bags |
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| CN2011100494262A CN102162227B (en) | 2011-03-02 | 2011-03-02 | Underwater slope backing method of bulky sand filled geotechnical pillow bags |
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| CN102162227B true CN102162227B (en) | 2012-06-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2486308C1 (en) * | 2011-12-22 | 2013-06-27 | Государственное научное учреждение Поволжский научно-исследовательский институт эколого-мелиоративных технологий Российской академии сельскохозяйственных наук | Method to seal damages in hydraulic engineering structures under water surface |
| CN102828514A (en) * | 2012-09-13 | 2012-12-19 | 江苏淮阴船用机械有限公司 | Riprap operation device of lifting hopper |
| CN103010410B (en) * | 2012-12-28 | 2016-06-15 | 长江宜昌航道工程局 | A kind of water-permeable frame is jettisoninged method |
| CN104358231B (en) * | 2014-11-12 | 2016-05-25 | 浙江交通职业技术学院 | A kind of Underwater Slope mold-bagged concrete reinforced construction method |
| CN104652367B (en) * | 2015-02-15 | 2016-09-21 | 中交上航局航道建设有限公司 | A kind of construction method laying Dam Approach with Big Bag sand quilt in mud district |
| CN112900443A (en) * | 2021-01-21 | 2021-06-04 | 南京市水利规划设计院股份有限公司 | Underwater construction method for deep groove bagged sand throw pillow protection engineering |
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| US4420275A (en) * | 1982-04-19 | 1983-12-13 | Shell Oil Company | Alaskan offshore drilling base |
| CN1060833C (en) * | 1997-08-25 | 2001-01-17 | 卞仲贤 | Construction technique for water bottom building of dike (dam) in deepwater region |
| CN101624816B (en) * | 2009-06-12 | 2011-05-11 | 中交二航局第三工程有限公司 | Building method for inverted filter of inner side of artificial island riprap mole island wall |
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