CN104594290B - A kind of soft raft mattress sinking constructional method - Google Patents
A kind of soft raft mattress sinking constructional method Download PDFInfo
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- CN104594290B CN104594290B CN201410807387.1A CN201410807387A CN104594290B CN 104594290 B CN104594290 B CN 104594290B CN 201410807387 A CN201410807387 A CN 201410807387A CN 104594290 B CN104594290 B CN 104594290B
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- soft raft
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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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
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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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/14—Preformed blocks or slabs for forming essentially continuous surfaces; Arrangements thereof
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Abstract
The present invention discloses a kind of soft raft mattress sinking constructional method, it is characterized in that, arrangement arranges permeable opening, make to arrange lower section current during mattress sinking through the flowing of permeable opening upwards, and then improve arrangement settling velocity, slowing down concussion drift row and floating row's phenomenon, after mattress sinking, curtain shape cloth body hides opening under flow action, ensures the protection effect of geotextile. The efficiency that this technology can improve mattress sinking implantation, the drift row reduced in mattress sinking process and the row's of tearing phenomenon, ensure tolerance range. The present invention has soft raft mattress sinking can be facilitated to operate, it is to increase the advantage of the Efficiency and accuracy of mattress sinking implantation, it is to increase soft raft to the protected effect in riverbed and extends work-ing life.
Description
Technical field
The present invention relates to a kind of riparian protection technology, especially relate to a kind of soft raft mattress sinking constructional method.
Background technology
Existing soft raft is a kind of riverbed extending out and the riverbank protection technology of processing on soft base technique at geotextile, the nineties in last century, is used to the middle and lower reach of Yangtze River and Estuary navigation channel regulation and riverbank and coast environmental protection engineering. Over more than 20 year, the structure pattern of soft raft and mattress sinking mode etc. were done many discussions by numerous designs and engineering workmen, but there is no bigger improvement, the ordinary construction of existing soft raft, generally comprise be positioned at lower section be layed in both sides, riverbed arrangement and evenly interval be arranged in the concrete block of arrangement top, such as China 201410121675.1 once disclosed a kind of interlocking segment soft raft, namely have employed this kind of structure. In existing part soft raft structure, also having set up reinforced bands to improve intensity, the disclosed a kind of concrete body interlocking segment soft raft of such as China's number of patent application 201220379345.9, is this kind of structure.
Above-mentioned existing soft raft structure, during site operation, it is all adopt first soft raft file leader's section to be laid to be fixed on riverbed two upper lateral part river levee, then employing is provided with the ship of arranging turning over plate structure and carries soft raft last person's part, arrange ship outwards slowly travel and by turn over plate structure guide arrangement sink in river so that it is by conduct oneself with dignity sink and fit on bottom surface, both sides, riverbed.
During this kind of existing soft raft mattress sinking, geotextile is excessive by water pressure in sinking watching, not easily sink, and the concrete block all wt of ballast all acts in geotextile above, further increase various power when soft raft in sinking watching is floating to be shaken, cause the danger that soft raft easily turns over volume, tears.
Specifically, by technical research during site operation, and the water lower stress of soft raft and the research of failure mechanisms are found, in the process of arranging, when flow rate of water flow is bigger, isostere is very big by resistance, isostere is easily slided, the upper edge of its underwater portion, under the lifting of impulsive force and turbulent fluctuation water body, is easy to turn over volume, causes adverse consequences. Its consequence one soft raft is left originally design bed position, does not reach design requirements, and causes the waste of isostere, reduces soft raft protected effect. Two is after volume is turned in isostere front portion; increase upstream end isostere water side; increase the stop to current and detour flow; make turbulent water near isostere, rolling stronger; and increase local velocity; thus cause isostere to shake up and down under flow action, floating, and then arrangement may be torn, this reduces the overall protected effect of soft raft and work-ing life.
Summary of the invention
For above-mentioned the deficiencies in the prior art; technical problem to be solved by this invention is: how to provide one that soft raft mattress sinking can be facilitated to operate; improve mattress sinking implantation Efficiency and accuracy, and then improve soft raft to the protected effect in riverbed and the soft raft mattress sinking constructional method extending work-ing life.
In order to solve the problems of the technologies described above, present invention employs following technical scheme:
A kind of soft raft mattress sinking constructional method, it is characterised in that, arrangement arranges permeable opening, make to arrange lower section current during mattress sinking through the flowing of permeable opening upwards, and then improve arrangement settling velocity, slow down concussion drift row and floating row's phenomenon, it is to increase the Efficiency and accuracy of mattress sinking implantation.
Specifically, in present method, it it is the soft raft that specifically have employed following structure, described soft raft comprise be positioned at lower section arrangement and uniform array be arranged at arrangement upper surface concrete block, in described arrangement, each concrete block position correspondence corresponding is fixedly installed two pairs of tethers, and described concrete block two ends are symmetrically arranged with two circle grooves and are fixed in arrangement at groove place by tether; The interstitial site that described arrangement is sunken in the part of underwater between concrete block is also provided with some permeable openings, and permeable opening faces the direction that meets water in the arrangement on limit and is fixedly installed block cloth, covers described permeable opening when block cloth falls;
Then when concrete mattress sinking is constructed, first the arrangement volume presetting tether and permeable opening and block cloth is wrapped up on the spool being arranged on and arranging on ship, then arrangement one end is pulled out spool and by tether, concrete block is fastened in concrete block position, arrangement is pulled out end is fixed on riverbank, then start gradually and arrange ship toward moving away from direction, riverbank, make that arranging arranges in ship moving process and it is drawn out gradually and make it put into the water surface after having fixed concrete block in the arrangement of pull-out, then concrete block sink under gravity it is arranged in, and make the water body of arrangement lower section by permeable opening gushing keep arrangement to be vertically settled down to the bottom, arrangement is blocked when arranging ship and move to soft raft outer end predeterminated position, complete mattress sinking construction.
Like this, between concrete block, it is provided with permeable opening and block cloth, when mattress sinking operates, current through the flowing of permeable opening, can be discharged the water body of arrangement lower section, be beneficial to the sedimentation of arrangement effectively, slowing down concussion drift row, the phenomenon of floating row occurs, it is to increase the Efficiency and accuracy of mattress sinking implantation. Simultaneously after mattress sinking, the setting of block cloth can shelter from permeable opening by Parallel to the flow direction, well closure of openings is lived, and reaches and well protects beach effect and extend work-ing life. Meanwhile, when mattress sinking is constructed, adopt and arrange ship and put cloth by spool scene and fix concrete block by tether and complete mattress sinking after in-situ processing, it is to increase speed of application and efficiency.
As optimization, described permeable opening is intersected by two ends and not cracking and form on the same line. Like this, permeable opening has cracking of certain angle by two and forms, when mattress sinking is operated, article two, the arrangement between cracking can be dug with on current direction, making to arrange lower section current as far as possible can vertically by permeable opening, maximum degree slows down the surging force of vergence direction, is beneficial to the vertical sedimentation implantation of arrangement like this, it is to increase implantation tolerance range.
Further, described permeable opening by cracking of arranging of a Parallel to the flow direction and is connected to this and cracks one end, downstream and cracking of extending in the middle part of Vertical dimension riverbed is formed; Two of the rectangular and block cloth of described block cloth self and arrangement sew up line and two crack and just form rectangles, the corner part that block cloth is not fixed covers described two and cracks.
Like this, the open end of permeable opening and block cloth is arranged along back upper place, direction is consistent with joint efforts to make itself and riverbed be subject to water impact and wave impact, maximum degree improve mattress sinking after block cloth occlusion effect that two are cracked, simultaneously block cloth self is rectangular and two of block cloth and arrangement sew up line and two crack and just form the structures of rectangles, that can improve block cloth self like this is connected and fixed intensity, simultaneously two of block cloth are sewed up line and can be considered as defining the effect of twice stiffening web in the be hit front in direction of cracking, reduce owing to what crack is arranged the impact that arrangement bulk strength reduction brings. so just maximum degree raising soft raft to the protected effect in riverbed and extends its work-ing life.
As optimization, in described arrangement, each concrete block position correspondence corresponding is fixedly installed two pairs of tethers, and described concrete block two ends are symmetrically arranged with two circle grooves and are fixed in arrangement by tether at groove place.
Like this, it is possible to being fixedly connected with between convenient arrangement and concrete block, convenient construction.
As optimization, permeable opening entirety is arranged in row's shape, often arranges permeable opening and shifts to install and make spacing between the permeable opening of arbitrary neighborhood equal. Like this, it is possible to make stress distribution the most even, reduce permeable opening better to the impact of arrangement bulk strength, and then while maximum water permeable area is provided, ensure self maximum strength of arrangement, extend work-ing life.
Compared to prior art, present method possesses following advantage:
1, the inventive method have employed the arrangement of local half opening, in the process arranged, the water body under arrangement is appeared effectively, reduce difficulty of construction; When arrangement is sunk in the bottom, due to flowing water flow path direction downstream, again the arrangement of darning is paved on the quadrangular window being left unlocked or unlatched, well reach the effect protecting the steady groove in beach. This kind of structure is more suitable in big depth of water section to construct; both ensure that soft raft self structure safety; ensureing that again river silt is not flushed away below soft raft, therefore possess the advantage that construction is simple, protected effect is good, the section being particularly suitable in river that flow velocity is big, the depth of water is big practices.
2, the quadrangular window structure of being left unlocked or unlatched in present method is exactly the structural advantage utilizing self, mattress sinking is carried out by the gravity of self and flow resistance difference, this and the existing technology of arranging have optimization in essence, by these windows, improve the obstruct by force to current or encirclement, serve and dredge and shock absorption, reduce flow resistance, contribute to better improving flow-shape.
3, in present method, not only disclose the method adopting and optimizing arrangement, also disclosed concrete quadrilateral structure and the layout structure of setting, what can make permeable optimization plays the effect reducing difficulty of construction simultaneously, also maximised the stability of soft raft self simultaneously.
In sum, the present invention has soft raft mattress sinking can be facilitated to operate, it is to increase the advantage of the Efficiency and accuracy of mattress sinking implantation, it is to increase soft raft to the protected effect in riverbed and extends work-ing life.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the soft raft that the present invention adopts.
Fig. 2 is the structure for amplifying schematic diagram of independent permeable aperture position in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
A kind of soft raft mattress sinking constructional method, its main points are, arrange permeable opening in arrangement, make to arrange lower section current during mattress sinking through the flowing of permeable opening upwards, and then improve arrangement settling velocity, slow down concussion drift row and floating row's phenomenon, it is to increase the Efficiency and accuracy of mattress sinking implantation.
Specifically, the present invention is the soft raft that have employed as shown in Figure 1-2, its structure comprise be positioned at lower section arrangement 1 and uniform array be arranged at arrangement 1 upper surface concrete block 2, the interstitial site that described arrangement 1 is sunken in the part of underwater between concrete block 2 is also provided with some permeable openings 4, permeable opening faces the direction that meets water in the arrangement on limit and is fixedly installed block cloth 3, covers described permeable opening 4 when block cloth 3 falls.
Like this, between concrete block, it is provided with permeable opening and block cloth, when mattress sinking operates, current through the flowing of permeable opening, can be discharged the water body of arrangement lower section, be beneficial to the sedimentation of arrangement effectively, slowing down concussion drift row, the phenomenon of floating row occurs, it is to increase the Efficiency and accuracy of mattress sinking implantation. Simultaneously after mattress sinking, the setting of block cloth can shelter from permeable opening by Parallel to the flow direction, well closure of openings is lived, and reaches and well protects beach effect and extend work-ing life.
Wherein, described permeable opening 4 is intersected by two ends and not cracking and form on the same line. Like this, permeable opening has cracking of certain angle by two and forms, when mattress sinking is operated, article two, the arrangement between cracking can be dug with on current direction, making to arrange lower section current as far as possible can vertically by permeable opening, maximum degree slows down the surging force of vergence direction, is beneficial to the vertical sedimentation implantation of arrangement like this, it is to increase implantation tolerance range. When specifically implementing, two crack to grow up and are generally arranged to about 20cm, it is possible to ensure arrangement bulk strength while completing permeable decompression well.
Wherein, described permeable opening 4 by cracking of arranging of a Parallel to the flow direction and is connected to this and cracks one end, downstream and cracking of extending in the middle part of Vertical dimension riverbed is formed; Described block cloth 3 self is rectangular and two of block cloth 3 and arrangement 1 sew up line and two crack and just form rectangles, the corner part that block cloth 3 is not fixed covers described two and cracks.
Like this, the open end of permeable opening and block cloth is arranged along back upper place, direction is consistent with joint efforts to make itself and riverbed be subject to water impact and wave impact, maximum degree improve mattress sinking after block cloth occlusion effect that two are cracked, simultaneously block cloth self is rectangular and two of block cloth and arrangement sew up line and two crack and just form the structures of rectangles, that can improve block cloth self like this is connected and fixed intensity, simultaneously two of block cloth are sewed up line and can be considered as defining the effect of twice stiffening web in the be hit front in direction of cracking, reduce owing to what crack is arranged the impact that arrangement bulk strength reduction brings. so just maximum degree raising soft raft to the protected effect in riverbed and extends its work-ing life.
Wherein, in described arrangement 1, each concrete block 2 position correspondence corresponding is fixedly installed two pairs of tethers 5, and described concrete block 2 two ends are symmetrically arranged with two circle grooves and are fixed in arrangement 1 by tether 5 at groove place.
Like this, it is possible to being fixedly connected with between convenient arrangement and concrete block, convenient construction.
Wherein, permeable opening 4 entirety is arranged in row's shape, often arranges permeable opening 4 and shifts to install and make spacing between the permeable opening of arbitrary neighborhood 4 equal. Like this, it is possible to make stress distribution the most even, reduce permeable opening better to the impact of arrangement bulk strength, and then while maximum water permeable area is provided, ensure self maximum strength of arrangement, extend work-ing life.
The present invention is when mattress sinking is constructed, first the arrangement volume presetting tether and permeable opening and block cloth is wrapped up on the spool being arranged on and arranging on ship, then arrangement one end is pulled out spool and by tether, concrete block is fastened in concrete block position, arrangement is pulled out end is fixed on riverbank, then start gradually and arrange ship toward moving away from direction, riverbank, make that arranging arranges in ship moving process and it is drawn out gradually and make it put into the water surface after having fixed concrete block in the arrangement of pull-out, then concrete block sink under gravity it is arranged in, and make the water body of arrangement lower section by permeable opening gushing keep arrangement to be vertically settled down to the bottom, arrangement is blocked when arranging ship and move to soft raft outer end predeterminated position, complete mattress sinking construction.
In addition, during construction, can also further, reserve a segment distance in soft raft arrangement position, both sides of the edge in advance and transversely obtain with longitudinally stitching some along the mutual continuous print circle cloth cylinder of side directions of arranging after backrush, and when mattress sinking, an opening cut off by each circular cloth cylinder, in circular cloth cylinder, pour into river sand by opening and make circular cloth cylinder heave the sectional-drum-shape in similar sausage, opening is sewed up laggard row mattress sinking again, and the diameter of circular cloth cylinder is 30cm.
Like this when mattress sinking, circular cloth cylinder can prevent arrangement edge by turning over volume phenomenon during water impact because of unbalance stress better, reduces the phenomenons such as volume row and marginal laceration, it is to increase mattress sinking implantation tolerance range simultaneously. During simultaneously mattress sinking, circular cloth cylinder and the contact turning over plate and turn over plate both sides limit sliding chutes are all the contacts in line and face, and friction resistance is little, drastically increases mattress sinking smooth degree. In addition after mattress sinking, owing to cloth cylinder is circular, it is possible to make the overlap joint of position, edge between arranged adjacent reliably convenient, it is more prone to form overlap joint and lap gap can not be left, position, arranged adjacent edge protected effect is good; Owing to arrangement is for geotextile, it is possible to the river sand in the circular cloth cylinder of protection can not be through arrangement punching and walk, therefore generally speaking greatly extend soft raft work-ing life.
Claims (4)
1. a soft raft mattress sinking constructional method, it is characterised in that, arrangement arranges permeable opening, make to arrange lower section current during mattress sinking through the flowing of permeable opening upwards, and then improve arrangement settling velocity, slow down concussion drift row and floating row's phenomenon, it is to increase the Efficiency and accuracy of mattress sinking implantation;
Specifically have employed the soft raft of following structure, described soft raft comprise be positioned at lower section arrangement and uniform array be arranged at arrangement upper surface concrete block, in described arrangement, each concrete block position correspondence corresponding is fixedly installed two pairs of tethers, and described concrete block two ends are symmetrically arranged with two circle grooves and are fixed in arrangement at groove place by tether; The interstitial site that described arrangement is sunken in the part of underwater between concrete block is also provided with some permeable openings, and permeable opening faces the direction that meets water in the arrangement on limit and is fixedly installed block cloth, covers described permeable opening when block cloth falls;
When concrete mattress sinking is constructed, first the arrangement volume presetting tether and permeable opening and block cloth is wrapped up on the spool being arranged on and arranging on ship, then arrangement one end is pulled out spool and by tether, concrete block is fastened in concrete block position, arrangement is pulled out end is fixed on riverbank, then start gradually and arrange ship toward moving away from direction, riverbank, make that arranging arranges in ship moving process and it is drawn out gradually and make it put into the water surface after having fixed concrete block in the arrangement of pull-out, then concrete block sink under gravity it is arranged in, and make the water body of arrangement lower section by permeable opening gushing keep arrangement to be vertically settled down to the bottom, arrangement is blocked when arranging ship and move to soft raft outer end predeterminated position, complete mattress sinking construction.
2. soft raft mattress sinking constructional method as claimed in claim 1, it is characterised in that, described permeable opening is intersected by two ends and not cracking and form on the same line.
3. soft raft mattress sinking constructional method as claimed in claim 2, it is characterised in that, described permeable opening is by cracking of arranging of a Parallel to the flow direction and is connected to this and cracks one end, downstream and in the middle part of Vertical dimension riverbed, cracking of extension is formed; Two of the rectangular and block cloth of described block cloth self and arrangement sew up line and two crack and just form rectangles, the corner part that block cloth is not fixed covers described two and cracks.
4. soft raft mattress sinking constructional method as claimed in claim 1, it is characterised in that, permeable opening entirety is arranged in row's shape, often arranges permeable opening and shifts to install and make spacing between the permeable opening of arbitrary neighborhood equal.
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| CN201410807387.1A CN104594290B (en) | 2014-12-23 | 2014-12-23 | A kind of soft raft mattress sinking constructional method |
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| CN201410807387.1A CN104594290B (en) | 2014-12-23 | 2014-12-23 | A kind of soft raft mattress sinking constructional method |
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| CN104594290B true CN104594290B (en) | 2016-06-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912141B (en) * | 2015-05-28 | 2018-01-16 | 中交一航局第二工程有限公司 | Immersed tube tunnel bedding geotextiles separation sectional type covers anti-silting system and method |
| CN105603933A (en) * | 2015-11-11 | 2016-05-25 | 郭岳 | Geotechnical reinforcement protective reversed filtering material and method for reinforcing dam by geotechnical reinforcement protective reversed filtering material |
| CN106049359B (en) * | 2016-07-14 | 2018-08-31 | 交通运输部天津水运工程科学研究所 | The dish-shaped concrete block river bottom protection soft raft of system |
| CN106284210B (en) * | 2016-08-05 | 2018-09-14 | 郭岳 | Reinforcement protection filtration material and its processing method |
| CN106120648A (en) * | 2016-08-05 | 2016-11-16 | 郭岳 | A kind of reinforcement protection filtration material |
| CN106337395A (en) * | 2016-10-12 | 2017-01-18 | 珠江水利委员会珠江水利科学研究院 | Concrete hinge soft-body mattress structure used for underwater anti-scouring protective projects |
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| EP0918109A1 (en) * | 1997-11-21 | 1999-05-26 | Gouderak B.V. | Method for manufacturing a supporting layer for mattress structures, and such supporting layer |
| 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 |
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