CN102966072A - Construction method for treating widened and heightened engineering joint surfaces of dikes on soft clay foundation - Google Patents
Construction method for treating widened and heightened engineering joint surfaces of dikes on soft clay foundation Download PDFInfo
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- CN102966072A CN102966072A CN2012104543239A CN201210454323A CN102966072A CN 102966072 A CN102966072 A CN 102966072A CN 2012104543239 A CN2012104543239 A CN 2012104543239A CN 201210454323 A CN201210454323 A CN 201210454323A CN 102966072 A CN102966072 A CN 102966072A
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Abstract
The invention relates to a construction method for treating widened and heightened engineering joint surfaces of dikes on a soft clay foundation. A waterproof laminated film with a grouting pipe is embedded when a horizontal drill stem is utilized to drill a horizontal hair crack along the direction of an old dike, and the joint surfaces of new and old dikes are grouted by the grouting pipe embedded in the waterproof laminated film, so that longitudinal cracks of the dikes, which are caused by differential settlement of the joint surfaces of the new and old dikes, are effectively controlled and the problem of seepage prevention of the joint surface of the new and old dikes is solved. The technical method disclosed by the invention solves the technical difficult problem of laying transverse reinforced materials in the old dike; and the grouting is carried out by the waterproof laminated film with the grouting pipe, so that the joint surfaces of the new and old dikes are compacted and the seepage of water on the joint surfaces of the new and old dikes is effectively prevented. Therefore, the problems of the longitudinal cracks of the dikes and seepage, which are caused by improper treatment on the widened and heightened engineering joint surfaces of the dikes on the soft clay foundation, are effectively controlled. The method has the advantages of simple construction process and strong operability, is convenient for quality control and has obvious economic benefits and obvious treatment effects.
Description
Technical field
The present invention relates to the reinforcement projects on embankments technical field, relate in particular to dyke on a kind of soft soil foundation and widen the job practices of increasing the punishment of engineering bonding surface.Mainly be applicable in the soft soil foundation dyke and widen technical fields such as increasing engineering relative settlement control and the antiseepage of the old and new's dyke bonding surface.
Background technology
Along with global warming, overall ecological degeneration, the harsh weather such as extra torrential rain, typhoon increase suddenly, and the engineering safeties such as dyke are consisted of gravely challenge.1998 Yangtze River valley extra torrential rain floods cause Jiujiang City's city defence dike to breach a dyke, and area, U.S. New Orleans in 2005 is because typhoon causes dyke destroys, and all cause a tremendous loss of lives and the serious consequence such as direct economic loss.About 280,000 kilometers of the built dyke building of China, but because the most water conservancy projectss of China were built in the 50-70 age in last century, be limited at that time technology, economic dispatch condition restriction, design, the construction quality of many dykes exists " inadequate natural endowment " to cause at present a large amount of dykes to have multiple diseases; The disease dyke causes great threat to the people life property safety, also is the weak link of flood control safety in flood season in every year.In recent years, the very important decision that Chinese Government has made post-disaster reconstruction, renovated rivers and lakes, builds water conservancy projects, significantly increase take the dynamics of investment of Changjiang dyke construction as main middle and lower reach of Yangtze River flood control project construction, old dyke is widened high comprehensive improvement, to improve its flood control and disaster relief ability.Dyke building on the soft soil foundation, old dyke bottom weak soil is finished consolidation settlement substantially under action of long-term load; And newly-increased dyke part bottom weak soil will cause larger sedimentation under the newly increased load effect, cause the relative settlement of the old and new's dyke, resistance to overturning and safety that impact is strengthened the dikes.Therefore, the bonding surface of the old and new's dyke punishment technology just seems particularly important, and the technical scheme of inquire into punishment the old and new dyke bonding surface, effectively controlling the relative settlement of the old and new's dyke seems particularly urgent.
Before the present invention, engineers and technicians have carried out certain research to the wide engineering of express highway roadbed assembly, Chinese invention patent application " method that adopts the board-like barricade of stake to carry out the high-fill roadbed splicing " (application number: 201110211046.4) disclose and a kind ofly vertically carry out the construction of digging hole filling pile and reinforced concrete retaining wall in old road base side slope, again to domatic slope and the step excavation cut of old road base, then placement in layers, compacted subgrade filler, the speedway on the road surface of constructing is at last pieced together wide engineering scheme.This method has saves the roadbed cross section technical advantages such as area, easy construction that occupy cultivated land; But also there are simultaneously the deficiencies such as the punishment expense is higher, embankment lateral deformation control requirement is stricter.Chinese invention patent application " a kind of anchoring type road foundation method for widening " (application number: 201210125803.0) disclose a kind of anchoring type road widening project method, namely first to domatic slope, the step excavation cut of old road base, at step surface Construction of Inclined anchor pole, the new roadbed of placement in layers is also laid geo-grid, and allow geo-grid be connected with the anchor pole exposed parts at the step surface place.This method links together the old and new's embankment by anchor pole and geo-grid, and anchor pole can avoid geo-grid to slide on base station rank, old road with being connected with using simultaneously of geo-grid, improves the old and new's subgrade stability; Anchor pole is connected with geo-grid and plays to a certain extent the effect that connects the old and new's roadbed, but since geo-grid itself not with the interlock of old road base, therefore be restricted in the effect that overcomes in the slip of the old and new's roadbed, the simultaneously use of anchor pole has also increased engineering punishment expense.In addition, geo-grid is as connecting the old and new's roadbed dowel, easy seepage flow connected surface between geo-grid and soil body contact interface generation the old and new roadbed.
Because the wide engineering of assembly of the highway construction such as speedway, generally only widen and do not increase processing; Simultaneously its embankment is substantially more than phreatic line, substantially do not need to consider the antiseepage problem between the old and new's roadbed bonding surface.Dyke building generally is in coastal, riverine Soft Soil Districts, newly-increased widen increase that dyke need to be considered and old dyke between the technical problems such as effective connection problem, relative settlement problem and antiseepage.And in the present prior art scheme, the rare effective punishment technical scheme of increasing engineering relative settlement and antiseepage control of widening for dyke, the construction technology that the old and new's dyke bonding surface is laid geo-grid only limits to lay in new dyke, and not for the construction technology of in old dyke, laying geosynthetics; The simple cover of some technical methods in the existing highway construction is used and is also had many deficiencies and technological deficiency in the dyke building.Therefore, a kind of the old and new's dyke of can effectively controlling of exploitation is widened and is increased the old and new's dyke relative settlement in the engineering, and prevents that effectively the technical method of bonding surface leakage problems from becoming an instant job.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency and defective, dyke is widened cross section relative settlement and the old and new's dyke bonding surface antiseepage problem of increasing engineering on the solution soft soil foundation, a kind of job practices of utilizing composite earthwork cloth associating slip casting method punishment the old and new dyke bonding surface is proposed, utilize special-purpose construction machinery in old dyke, vertically to tunnel and lay composite earthwork cloth along dyke, make composite earthwork cloth and the effective interlock of old dyke, after having filled new dyke, by the Grouting Pipe that is embedded in the composite earthwork cloth the old and new's dyke bonding surface is carried out slip casting, to reach the double effects of compacted the old and new's dyke bonding surface and antiseepage.
The technical solution used in the present invention is: at active well of old dyke and new dyke binding site excavation, and the microbit on the rig is arranged in the active well, go out soil box and be connected with composite earthwork cloth and also be arranged in the active well adjacent the connection in the drilling rod back and with connecting ring on the drilling rod; By the effect of creeping into along dyke direction rig, be laid in the old dyke and newly widen above the dyke with the composite earthwork cloth of Grouting Pipe; Finish successively each design attitude with the laying of the composite earthwork cloth of Grouting Pipe and newly widen increase the filling of dyke after, in active well, by Grouting Pipe slip casting is carried out at the old and new's dyke bonding surface position at composite earthwork cloth place and is processed; Widen the Treatment Scheme of increasing engineering the old and new dyke bonding surface thereby finish.
Dyke is widened the job practices of increasing the punishment of engineering bonding surface on a kind of soft soil foundation, comprises following technical step:
(1) smooth location is measured unwrapping wire, determines the position of construction working well, buries underground with the paving location of the composite earthwork cloth of Grouting Pipe and in the depth of burying of old dyke inside;
(2) at old dyke inner excavation construction working well, at the domatic excavation first order of old dyke stair working face;
(3) arrange rig at the stair working face, in the construction working well, arrange successively with the gear drilling rod, go out soil box and with the composite earthwork cloth of Grouting Pipe, and will be connected with band gear drilling rod with the composite earthwork cloth of Grouting Pipe by connecting ring, go out soil box and be arranged in above the composite earthwork cloth with Grouting Pipe that part launches, and be flexibly connected with band gear drilling rod;
(4) start rig, make the digging of band gear drilling rod, and go out dregs by going out the soil box transverse row, simultaneously along dyke direction mobile drill and drilling rod, make the vertical slit of formation level in the old dyke, follow rig and vertically moving of drilling rod and in the vertical slit of the level that is arranged in the composite earthwork cloth of Grouting Pipe;
(5) laid the composite earthwork cloth with Grouting Pipe on the stair working face at the corresponding levels after, remove rig and drilling rod, fill and newly widen the dyke banking material, and layered rolling;
(6) fill design next stage work plane, excavation next stage stair working face repeats (3)-(5) construction sequence, finishes subsequent stages and newly widens dyke and fill;
(7) finish newly widen dyke be combined with old dyke the composite earthwork cloth of wearing Grouting Pipe laying and newly widen the filling of dyke after, fill and newly increase the part dyke;
(8) finish widen increase fill after, at the construction working well composite earthwork cloth with Grouting Pipe is carried out cement grout or polymer material grouted;
(9) after slip casting was finished, the backfill construction active well was finished at last whole dyke and is widened the construction of increasing engineering bonding surface punishment technology.
Described construction working well, its degree of depth is 5-15 m, length is 3-7 m, width is 2-5 m, the Specific construction active well degree of depth is determined according to be excavated at the bottom of the dike composite earthwork cloth paving location of first order band Grouting Pipe downwards from old dyke top, construction working well length is according to determining with the depth of burying of composite earthwork cloth in old dyke of Grouting Pipe, and construction working well width is according to arranging successively with the gear drilling rod, going out soil box and determine with the space width of the composite earthwork cloth coiled material of Grouting Pipe; In order to reduce with the composite earthwork cloth of Grouting Pipe and the frictional resistance between the dyke soil body, every 1-3 km a construction working well is being set along the dyke direction.
Described composite earthwork cloth with Grouting Pipe, width are 4-10 m, and wherein the width of composite earthwork cloth in old dyke inside with Grouting Pipe is 2-5 m; The inner slip casting flexible pipe of laying horizontal and vertical perforation of composite earthwork cloth is finished composite earthwork cloth and is newly widened and increase after dyke fills burying underground, and the old and new's dyke bonding surface of composite earthwork cloth being buried underground by the slip casting flexible pipe carries out slip casting.
Described drilling rod, its diameter are 5-15 cm, and length is 2-6 m, and the drilling rod outside is helical gear, and the composite earthwork cloth and the connecting ring that goes out soil box of three connecting band Grouting Pipe is set at drilling rod.
Describedly going out soil box, for length is 2-6 m, highly is 5-15 cm, is 0.2-0.5 m away from rig end width, is the trapezoidal semi-enclosed cavity of 1-2 m near rig end width, wherein opens wide near drilling rod and rig one side.
Described working bank is the right-angle side at the domatic excavation of old dyke, and general the old and new's dyke is widened and increased an engineering installation 2-4 working bank.
Described slurries are cement grout or high polymer material slurries.
Advantage of the present invention and effect are: when utilizing horizontal drilling rod along the horizontal slit of the vertical brill of old dyke, bury the composite earthwork cloth with Grouting Pipe underground, filled newly to widen and increased after the dyke, by the slip casting flexible pipe that is embedded in the composite earthwork cloth the old and new's dyke bonding surface has been carried out slip casting; Thereby effectively control the relative settlement of the old and new's dyke bonding surface and cause dyke longitudinal crack and the old and new's dyke bonding surface antiseepage problem.This technical method belongs to no-excavation construction method, does not need to excavate in a large number, and engineering quantity is few, and construction costs is low, guarantees that simultaneously the geotextiles that connects the old and new's dyke bonding surface is arranged in old dyke inside effectively, and geotextiles is tight with old dyke gummed; With the composite earthwork cloth of Grouting Pipe, fill finish widen high-new dyke after, by slip casting compacted the old and new's dyke bonding surface, slurries and the soil body cementing prevented the infiltration of water at the old and new's dyke bonding surface place effectively.Set the pile foundation technology and compare newly widening dyke bottom ground with traditional, the inventive method has been saved construction cost and construction period greatly, has simultaneously the not available antiseepage function of piling basic technology; With traditional comparing in the old and new's dyke bonding surface laying geo-grid technology, it is inner that the inventive method allows geotextiles effectively be laid on old dyke, make itself and old dyke interlock tight, greatly improve the transversal reinforcement effect, also had the not available antiseepage function of simple laying geo-grid technology simultaneously.The technology of the present invention method has solved the laying technology difficult problem of transversal reinforcement material in old dyke; Simultaneously also be that a kind of dyke that reduces on the soft soil foundation is widened and increased the effective technology measure that engineering causes dyke longitudinal crack and seepage.The method construction technology is simple, workable, is convenient to quality control, and economic benefit is obvious, and the punishment effect is remarkable.
Description of drawings
Fig. 1 is cross-sectional structure schematic diagram after construction of the present invention is finished;
Fig. 2 is the vertical schematic diagram of construction well arrangement of the present invention;
Fig. 3 is cross-sectional structure schematic diagram in the work progress of the present invention;
Fig. 4 is drilling rod of the present invention, go out the schematic cross-section that soil box and composite earthwork cloth are arranged;
Wherein, 1 is old dyke, and 2 is new dyke, 3 is soft soil foundation, and 4 is old dyke end face, and 5 for newly increasing the dyke end face, 6 is domatic for widening the old dyke in place, and 7 is domatic for newly widening dyke, and 8 is the old and new's dyke bonding surface stair working table top, 9 are the composite earthwork cloth with Grouting Pipe, and 10 is grouting serous fluid and soil body mixture, and 11 is the construction working well, 12 is rig, 13 are band gear drilling rod, and 14 for going out soil box, and 15 is composite earthwork cloth and drilling rod connecting ring.
The specific embodiment
Be described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Protection scope of the present invention is not limited only to the description of present embodiment.
At first, smooth location is measured unwrapping wire, determines to bury underground the position of composite earthwork cloth 9 and in the degree of depth of old dyke 1 inside; At old dyke 1 inner excavation construction working well 11, at the domatic 4 excavation first order stair working faces 8 of old dyke; Arrange rig 12 at stair working face 8, in construction working well 11, arrange successively with gear drilling rod 13, go out soil box 14 and with the composite earthwork cloth 9 of Grouting Pipe, and will be connected by connecting ring 15 with band gear drilling rod 13 with the composite earthwork cloth 9 of Grouting Pipe, go out soil box 14 and be arranged in above the composite earthwork cloth 9 with Grouting Pipe that part launches, and be flexibly connected with band gear drilling rod 13; Start rig 12, drilling rod 13 diggings with gear, and laterally discharge by going out soil box 14, simultaneously vertically move rig 12 and drilling rod 13 along dyke, make the horizontal longitudinal seam of old dyke 1 interior formation, follow rig 12 and vertically moving of drilling rod 13 and in the vertical slit of the level that is arranged in the composite earthwork cloth 9 of Grouting Pipe; After having laid the composite earthwork cloth 9 with Grouting Pipe on the first order stair working face 8, remove rig 12 and drilling rod 13, fill and newly widen dyke 2 banking materials, and layered rolling; Fill design second level work plane, excavation second level stair working face 8 repeats above-mentioned construction sequence, finishes subsequent stages and newly widens dyke 2 and fill; Finish and newly widen dyke 2 and old dyke 1 bonding surface 6 with after the laying of the composite earthwork cloth 9 of Grouting Pipe and newly widening the filling of dyke 2, fill and newly increase part dyke 2; Finish widen increase fill after, carry out cement grout or polymer material grouted at 11 pairs of composite earthwork cloths 9 with Grouting Pipe of construction working well; After slip casting was finished, backfilling working well 11 was finished at last whole dyke and is widened and increase engineering bonding surface punishment technology construction.
Claims (5)
1. dyke is widened the job practices of increasing the punishment of engineering bonding surface on the soft soil foundation, comprises following technical step:
(1) smooth location is measured unwrapping wire, determines the position of construction working well, buries underground with the paving location of the composite earthwork cloth of Grouting Pipe and in the depth of burying of old dyke inside;
(2) at old dyke inner excavation construction working well, at the domatic excavation first order of old dyke stair working face;
(3) arrange rig at the stair working face, in the construction working well, arrange successively with the gear drilling rod, go out soil box and with the composite earthwork cloth of Grouting Pipe, and will be connected with band gear drilling rod with the composite earthwork cloth of Grouting Pipe by connecting ring, go out soil box and be arranged in above the composite earthwork cloth with Grouting Pipe that part launches, and be flexibly connected with band gear drilling rod;
(4) start rig, make the digging of band gear drilling rod, and go out dregs by going out the soil box transverse row, simultaneously along dyke direction mobile drill and drilling rod, make the vertical slit of formation level in the old dyke, follow rig and vertically moving of drilling rod and in the vertical slit of the level that is arranged in the composite earthwork cloth of Grouting Pipe;
(5) laid the composite earthwork cloth with Grouting Pipe on the stair working face at the corresponding levels after, remove rig and drilling rod, fill and newly widen the dyke banking material, and layered rolling;
(6) fill design next stage work plane, excavation next stage stair working face repeats (3)-(5) construction sequence, finishes subsequent stages and newly widens dyke and fill;
(7) finish newly widen dyke be combined with old dyke the composite earthwork cloth of wearing Grouting Pipe laying and newly widen the filling of dyke after, fill and newly increase the part dyke;
(8) finish widen increase fill after, at the construction working well composite earthwork cloth with Grouting Pipe is carried out cement grout or polymer material grouted;
(9) after slip casting was finished, the backfill construction active well was finished at last whole dyke and is widened the construction of increasing engineering bonding surface punishment technology.
2. dyke is widened the job practices of increasing the punishment of engineering bonding surface on a kind of soft soil foundation claimed in claim 1, and it is characterized in that: the degree of depth of construction working well is 5-15 m, and length is 3-7 m, and width is 2-5 m; Every 1-3 km a construction working well is being set along the dyke direction.
3. dyke is widened the job practices of increasing the punishment of engineering bonding surface on a kind of soft soil foundation claimed in claim 1, it is characterized in that: the inner slip casting flexible pipe of laying horizontal and vertical perforation of composite earthwork cloth, composite earthwork cloth width with Grouting Pipe is 4-10 m, and the width that wherein is embedded in old dyke inside is 2-5 m.
4. dyke is widened the job practices of increasing the punishment of engineering bonding surface on a kind of soft soil foundation claimed in claim 1, it is characterized in that: drill pipe diameter is 5-15 cm, length is 2-6 m, the drilling rod outside is helical gear, arranges that at drilling rod three connect the composite earthwork cloth of slurry pipe and go out the soil box connecting ring.
5. dyke is widened the job practices of increasing the punishment of engineering bonding surface on a kind of soft soil foundation claimed in claim 1, it is characterized in that: unearthed slot length is 2-6 m, highly be 5-15 cm, be 0.2-0.5 m away from rig end width, close rig end width is the trapezoidal semi-enclosed cavity of 1-2 m, wherein opens wide near drilling rod and rig one side.
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| CN106013193A (en) * | 2016-07-12 | 2016-10-12 | 中国电建集团成都勘测设计研究院有限公司 | Geomembrane cofferdam top structure and cofferdam heightening method |
| CN106368092A (en) * | 2016-11-11 | 2017-02-01 | 合肥工业大学 | Construction method of high-polymer grouting-reinforced antisettling widened roadbed |
| CN106368093A (en) * | 2016-11-11 | 2017-02-01 | 合肥工业大学 | Construction method of high-polymer grouting-reinforced anti-settlement widened roadbed |
| CN106381789A (en) * | 2016-11-11 | 2017-02-08 | 合肥工业大学 | High-polymer grouting reinforcement anti-settlement widened roadbed |
| CN106400635A (en) * | 2016-11-11 | 2017-02-15 | 合肥工业大学 | High polymer grouting reinforcement and anti-settlement broadened roadbed for high embankment |
| CN106968219A (en) * | 2017-04-17 | 2017-07-21 | 中国农业大学 | A kind of the old and new's dyke joint portion ruggedized construction and its application |
| CN106978795A (en) * | 2017-04-17 | 2017-07-25 | 中国农业大学 | A kind of Novel geogrid and its application for the old and new's dyke joint portion |
| CN112176948A (en) * | 2020-10-09 | 2021-01-05 | 湖北省水利水电规划勘测设计院 | Construction method for preventing settlement and cracks of widened and heightened integral structure of dike project |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106368093A (en) * | 2016-11-11 | 2017-02-01 | 合肥工业大学 | Construction method of high-polymer grouting-reinforced anti-settlement widened roadbed |
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| CN106978795A (en) * | 2017-04-17 | 2017-07-25 | 中国农业大学 | A kind of Novel geogrid and its application for the old and new's dyke joint portion |
| CN112176948A (en) * | 2020-10-09 | 2021-01-05 | 湖北省水利水电规划勘测设计院 | Construction method for preventing settlement and cracks of widened and heightened integral structure of dike project |
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| CN102966072B (en) | 2014-09-10 |
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