CN104775414B - Super-soft dredger fill surface layer solidification crusting and foundation treatment method - Google Patents
Super-soft dredger fill surface layer solidification crusting and foundation treatment method Download PDFInfo
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- CN104775414B CN104775414B CN201510129221.3A CN201510129221A CN104775414B CN 104775414 B CN104775414 B CN 104775414B CN 201510129221 A CN201510129221 A CN 201510129221A CN 104775414 B CN104775414 B CN 104775414B
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Abstract
The invention discloses a super-soft dredger fill surface layer solidification crusting and foundation treatment method. The method comprises the following steps: (1) filling a super-soft dredger fill foundation to a target scale height; (2) directly pouring a flow-plastic sea mud-water-curing agent mixture onto the super-soft dredger fill foundation through a pumping pipeline of a large-sized workboat, solidifying for crusting to form a crust layer; (3) backwardly inserting a vertical plastic drain plate into the crust layer by adopting a spile machine, grooving in the surface of the crust layer, paving a horizontal drain pipe, and connecting the horizontal drain pipe with the vertical plastic drain plate end to end; (4) paving non-woven fabrics and a sealing film in sequence on the horizontal drain pipe from top to bottom, connecting the horizontal drain pipe with a vacuum pumping system, and performing vacuum pumping prepressing. By adopting the super-soft dredger fill surface layer solidification crusting and foundation treatment method, the vertical plate drain plate can be inserted in a complete mechanical way under the condition of no gravel material, bamboo sheathing or ribbed sheathing, the construction period is shortened greatly, and the construction is not restrained by the supply of the gravel material or the strength of filling soft soil.
Description
Technical field
The invention belongs to the foundation treatment technology neck of the aspect such as civil engineering, harbour or waterway engineering and hydraulic engineering
Domain, is related to a kind of ultra-soft barged-in fill top layer solidification crust and method for processing foundation.
Background technology
Coastal cities economic construction develops rapidly that the demand to soil is increasingly urgent, in order to solve " having a large population and a few land "
Situation, many cities start to carry out reclaiming land around sea activity on a large scale." hydraulic reclamation+vacuum (preloading) precompressed " mode of operation is current
Construction method the most universal in reclamation engineering.Prepressing water discharge consolidation is being carried out to saturated dredger soft soil, is needing hydraulic fill foundation to lead to
Cross natural evaporation, deadweight consolidation to some strength, then fill certain thickness sandstone material as supporting course or addition muscle basketry,
The materials such as bamboo sheathing improve foundation bearing capacity, then apply slotting vertical plastic draining board as vertical drainage passage, and fill certain thickness
The medium coarse sand bed course of degree is used as horizontal drainage passage.Reclamation engineering focus mostly in the Delta of the Pearl River, Yangtze River Delta and
The areas such as Tianjin, Hong Kong, have begun to critical shortage in these regional sandstone materials, further mean that from farther Areatransfer and build
It is set as dramatically increasing for this serious delayed with project progress.In addition, be based on existing technology, in most cases construction machinery without
Method enters hydraulic reclamation region, and the making and plastic draining board of the carrying drainage blanket needed for later stage basement process install almost complete
Depend on artificial, fall into that half meter of scene having difficulty in taking a step in " marshland " is visible at any time, speed of application is slow, almost mechanical
Change can be sayed.
Therefore, traditional " hydraulic reclamation+vacuum (preloading) precompressed " mode of operation is primarily present following defect and deficiency：(1) blow
Made ground base is longer by the cycle of natural evaporation, deadweight consolidation, seriously increases the construction period；(2) need substantial amounts of sandstone material
Supporting course and horizontal drainage bed course are performed, construction cost is high, waste serious；(3) in practice of construction, the bamboo sheathing of laying, muscle basketry etc.
Material is stayed in because being not easily taken out in hydraulic fill foundation and is slowly degraded with the time, it is thus possible to cause later stage hydraulic fill foundation excessive
Additional settlement；(4) mechanization degree is relatively low, it is artificial to fully rely on, low construction efficiency and difficulty is big.
The content of the invention
It is an object of the invention to provide under the conditions of one kind is may be implemented in without sandstone material, bamboo sheathing and muscle basketry, adopting completely
The ultra-soft barged-in fill top layer solidification crust of mechanical execution and method for processing foundation, the method highly shortened the construction period, and
Construction is not restricted by sandstone material supply and saturated dredger soft soil intensity.
To reach above-mentioned purpose, technical scheme below is present invention employs：
A kind of ultra-soft barged-in fill top layer solidification crust and method for processing foundation, it is characterised in that：The ultra-soft barged-in fill table
Layer solidification crust and method for processing foundation are comprised the following steps：
1) using conventional hydraulic reclamation method hydraulic reclamation ultra-soft reclaimed ground to target absolute altitude；
2) treat step 1) after the completion of, stream plastic state sea mud-water-curing agent mixture is direct by the pumping line of workboat
It is cast on ultra-soft reclaimed ground, after the curing agent mixture solidification of stream plastic state sea mud-water-, crust forms crust layer；
3) in step 2) retreated using board-plugging device on the crust layer that formed and apply slotting vertical plastic draining board, in crust layer
Surface grooving laying horizontal drain pipe, horizontal drain pipe is connected with vertical plastic draining board wrench；
4) non-woven fabrics and sealing film are laid on horizontal drain pipe from bottom to top successively, by horizontal drain pipe with take out true
Empty set system connects and carries out evacuation precompressed.
Preferably, step 2 of the present invention) in stream plastic state sea mud-water-curing agent mixture the thickness that pours be
1.5-2.0m；The solidification age of the stream plastic state sea mud-water-curing agent mixture is to be not less than 28 days；The solidification crust shape
Into crust layer undrained shear strength be more than 80kPa.
Preferably, step 3 of the present invention) specific implementation be：
3.1) directly retreated using board-plugging device on crust layer and apply slotting vertical plastic draining board；The vertical plastic draining board
Wrench expose to earth's surface；
3.2) in the upper surface laying horizontal drain pipe of crust layer；The horizontal drain pipe is arranged on the vertical modeling of adjacent two row
Expect between draining board and arranged for interval；
3.3) wrench that vertical plastic draining board is exposed to earth's surface one end is rolled up on the outer wall of horizontal drain pipe, with parcel nothing
Wrench and horizontal drain pipe junction that cloth wraps up vertical plastic draining board are spun, while bundling using band.
Technical scheme compared with prior art, with advantage following prominent：
(1) crust layer is formed using stream plastic state sea mud-water-curing agent mixture fast setting, solve ultra-soft barged-in fill
A difficult problem for top layer solidification crust；(2) flowing plastic state sea mud-water-curing agent mixture is after the completion of ultra-soft reclaimed ground hydraulic reclamation
Can be poured, stream plastic state sea mud-water-curing agent mixture only needs the i.e. curable crust formation of 28 day age to meet bearing requirements
Crust layer, substantially reduce the construction period；(3) pass through to lay muscle basketry, bamboo sheathing in instead of traditional hydraulic fill foundation processing method
Supporting course is performed with sandstone material carries out applying slotting vertical plastic draining board, so that the prepressing water discharge of ultra-soft reclaimed ground is solid
Knot can implement under the conditions of without sand, construction by sandstone material supply restrict, while avoid the hydraulic fill foundation later stage because muscle basketry,
The degraded of bamboo sheathing and the additional settlement that causes；(4) addition of sea mud-water-curing agent mixture, stir and pour, and later stage
Vertical plastic draining board apply insert can be completed by mechanically actuated, simple and quick, mechanization degree is high, both solves
Have method fully rely on manually, the big problem of low construction efficiency and difficulty；(5) sea mud-water-curing agent mixture solidification intensity
Improve consolidating in the hydration reaction and pozzolanic reaction, rather than traditional vacuum precompressed soft soil foundation method of cement
Knot draining (be accompanied by very big Volume Loss), therefore also having for technical solution of the present invention higher fills efficiency (unit
What volume clay particle can be ultimately formed cultivates ground packing volume).
Description of the drawings
Fig. 1 is to ultra-soft hydraulic reclamation using ultra-soft barged-in fill top layer provided by the present invention solidification crust and method for processing foundation
Schematic diagram after native treatment；
Fig. 2 is stream plastic state sea mud-water-curing agent mixture casting process schematic diagram；
Fig. 3 is vertical-horizontal drainage system and arranging schematic diagram；
Fig. 4 is vertical plastic draining board and horizontal drain pipe arrangement schematic diagram；
Fig. 5 is vertical plastic draining board wrench and horizontal drain pipe connection diagram；
Fig. 6 is drainage system and pumped vacuum systems connection diagram；
Description of reference numerals is as follows：
1- ultra-soft reclaimed grounds；2- sea muds-water-curing agent mixture；3- crust layers；4- workboats；5- pumping lines；
61- upper stratas non-woven fabrics；62- wraps up non-woven fabrics；The vertical plastic draining boards of 7-；8- horizontal drain pipes；9- jags；10- sealing films；
11- three way cock；12- horizontal drainages are responsible for；13- pumped vacuum systems.
Specific embodiment
The structure and its construction method of the present invention are described in further details with specific embodiment below in conjunction with the accompanying drawings：
Embodiment 1：
It is below the construction procedure of this technology：
Step 1：Hydraulic reclamation ultra-soft reclaimed ground 1.As shown in Fig. 2 enclosing and cultivating in region using traditional hydraulic reclamation method hydraulic reclamation
Ultra-soft reclaimed ground 1.
Step 2：Stream plastic state sea mud-water-curing agent mixture 2 is poured, solidification crust forms crust layer 3.As shown in Fig. 2
After the completion of 1 hydraulic reclamation of ultra-soft reclaimed ground, you can original state sea mud, water and cement mixing are formed stream modeling on Large Construction ship 4
State sea mud-water-curing agent mixture, wherein step 2 of the present invention) in stream plastic state sea mud-water-curing agent mixture by
Original state sea mud, water and cement mixing are formed；Original state sea mud is directly salvaged from seabed by workboat；Stream plastic state sea
Moisture content in mud-water-curing agent mixture (flows the quality and solid particle matter of water in plastic state sea mud-water-curing agent mixture
The ratio of amount, mass of solid particles refer to the dry weight after deducting water) for 150%-200%, the firming agent mixing of stream plastic state sea mud-water-
Cement content in thing is 50-60kg/m3.Stream plastic state sea mud-water-curing agent mixture 2 is directly cast in by pumping line 5
On ultra-soft reclaimed ground 1, thickness 1.5-2.0m is poured, solidify 28 days crust and form crust layer 3, as shown in Figure 3.
Step 3：Apply slotting vertical plastic draining board 7.As shown in figure 3, from suitable board-plugging device directly on the crust layer 3 after
Move back and apply slotting vertical plastic draining board 7；As shown in figure 4, vertical plastic draining board 7 is in quincuncial arrangement, adjacent vertical plastic draining
The distance between plate 7 is controlled in 1m or so；The wrench of vertical plastic draining board 7 exposes to earth's surface 30-40cm.
Step 4：Horizontal drain pipe 8 is laid in grooving.As shown in figure 4, horizontal drain pipe 8 is arranged in the vertical plastics of adjacent two row
Between draining board 7, arranged for interval, the vertical correspondence of the plastic draining board 7 piece horizontal drain pipe 8 of laying of two row；Then, in horizontal row
One layer of upper strata non-woven fabrics 61 are laid on water pipe 8 and sealing film 10 is laid.As shown in figure 5, vertical plastic draining board 7 is spilt in ground
The wrench of table one end is rolled up in the outer wall of horizontal drain pipe 8, then the plate of vertical plastic draining board 7 is wrapped up with one layer of parcel non-woven fabrics 62
Head and 8 junction of horizontal drain pipe, and bundled with band 9.
Step 5：Carry out vacuum preloading construction.As shown in fig. 6, using three way cock 11 by horizontal drain pipe 8 be connected to
On the horizontal drainage supervisor 12 that pumped vacuum systems 13 is connected, evacuation precompressed is carried out afterwards.
Embodiment 2：
After step 1～step 4 is completed such as embodiment 1, piling prepressing construction is carried out.
After horizontal drain pipe 8 is connected to horizontal drainage supervisor 12, layer of non-woven fabric is re-layed on horizontal drain pipe 8, it
After carry out layering piling prepressing.
Embodiment 3：
After step 1～step 4 is completed such as embodiment 1, combined vacuum and surcharge preloading construction is carried out.
Evacuation precompressed 10 days is first carried out, layer of non-woven fabric is then laid on diaphragm seal, and is carried out layering piling prepressing.
Claims (2)
1. a kind of ultra-soft barged-in fill top layer solidification is crusted and method for processing foundation, it is characterised in that：The ultra-soft barged-in fill top layer
Solidification crust and method for processing foundation are processed by following steps enforcement：
1）Using conventional hydraulic reclamation method hydraulic reclamation ultra-soft reclaimed ground to target absolute altitude；
2）Treat step 1）After the completion of, stream plastic state sea mud-water-curing agent mixture is directly poured by the pumping line of workboat
On ultra-soft reclaimed ground, after the curing agent mixture solidification of stream plastic state sea mud-water-, crust forms crust layer；The stream modeling
The thickness that pours of state sea mud-water-curing agent mixture is 1.5-2.0 m；The stream plastic state sea mud-water-curing agent mixture
Solidification age is to be not less than 28 days；The crust layer undrained shear strength that the solidification crust is formed is more than 80 kPa；The stream
Plastic state sea mud-water-curing agent mixture is formed by original state sea mud, water and cement mixing；The original state sea mud is by construction
Ship is directly salvaged from seabed；Moisture content in the stream plastic state sea mud-water-curing agent mixture is 150%-200%,
Cement content in the stream plastic state sea mud-water-curing agent mixture is 50-60kg/m3；
3）In step 2）Retreated using board-plugging device on the crust layer for being formed and apply slotting vertical plastic draining board, on the surface of crust layer
Horizontal drain pipe is laid in grooving, and horizontal drain pipe is connected with vertical plastic draining board wrench；
4）Lay non-woven fabrics and sealing film on horizontal drain pipe from bottom to top successively, by horizontal drain pipe and evacuation system
System connects and carries out evacuation precompressed.
2. ultra-soft barged-in fill top layer solidification according to claim 1 is crusted and method for processing foundation, it is characterised in that：It is described
Step 3）Specific implementation be：
3.1）Directly retreated using board-plugging device on crust layer and apply slotting vertical plastic draining board；The plate of the vertical plastic draining board
Head exposes to earth's surface；
3.2）In the upper surface laying horizontal drain pipe of crust layer；The horizontal drain pipe is arranged on the vertical plastic row of adjacent two row
Between water plate and arranged for interval；
3.3）The wrench that vertical plastic draining board is exposed to earth's surface one end is rolled up on the outer wall of horizontal drain pipe, with parcel non-woven fabrics
Wrench and the horizontal drain pipe junction of vertical plastic draining board are wrapped up, while bundling using band.
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| CN201510129221.3A CN104775414B (en) | 2015-03-24 | 2015-03-24 | Super-soft dredger fill surface layer solidification crusting and foundation treatment method |
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| CN104775414B true CN104775414B (en) | 2017-05-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105155510B (en) * | 2015-08-07 | 2017-04-12 | 华中科技大学 | Method capable of carrying out microorganism solidifying and crusting on super soft foundation surface and matching device |
| CN106836180A (en) * | 2016-12-30 | 2017-06-13 | 杭州亿东岩土工程有限公司 | A kind of weak soil ground baffle type precompressed processing method and system to top layer duricrust soil layer |
| CN108411884A (en) * | 2018-03-19 | 2018-08-17 | 吴慧明 | A kind of processing method of barged-in fill shallow-layer physical solidification |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476319A (en) * | 2009-01-14 | 2009-07-08 | 河海大学 | Curing method for fast forming crust layer on yard surface |
| CN101806057A (en) * | 2010-04-28 | 2010-08-18 | 河海大学 | Immediate processing method for hydraulic filling ultra-soft foundation by modified vacuum preloading and water-covering preloading |
| CN102493427A (en) * | 2011-11-16 | 2012-06-13 | 河海大学 | Rapid drainage and rapid consolidation construction method for yard silt by using solidified soil as surcharge |
| CN102926376A (en) * | 2012-11-15 | 2013-02-13 | 上海市政工程设计研究总院（集团）有限公司 | Treatment method for soft soil foundation in coastal reclamation region |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3008324B2 (en) * | 1992-10-19 | 2000-02-14 | 不動建設株式会社 | Soft ground improvement method |
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- 2015-03-24 CN CN201510129221.3A patent/CN104775414B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476319A (en) * | 2009-01-14 | 2009-07-08 | 河海大学 | Curing method for fast forming crust layer on yard surface |
| CN101806057A (en) * | 2010-04-28 | 2010-08-18 | 河海大学 | Immediate processing method for hydraulic filling ultra-soft foundation by modified vacuum preloading and water-covering preloading |
| CN102493427A (en) * | 2011-11-16 | 2012-06-13 | 河海大学 | Rapid drainage and rapid consolidation construction method for yard silt by using solidified soil as surcharge |
| CN102926376A (en) * | 2012-11-15 | 2013-02-13 | 上海市政工程设计研究总院（集团）有限公司 | Treatment method for soft soil foundation in coastal reclamation region |
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