CN202925540U - Arrangement structure of device for processing soft soil foundation in coastal reclamation region - Google Patents

Arrangement structure of device for processing soft soil foundation in coastal reclamation region Download PDF

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Publication number
CN202925540U
CN202925540U CN 201220603319 CN201220603319U CN202925540U CN 202925540 U CN202925540 U CN 202925540U CN 201220603319 CN201220603319 CN 201220603319 CN 201220603319 U CN201220603319 U CN 201220603319U CN 202925540 U CN202925540 U CN 202925540U
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soil layer
soft soil
processing
soft
deep level
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CN 201220603319
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白彦峰
徐健
温学钧
刘丽
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Shanghai Municipal Engineering Design Insitute Group Co Ltd
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Shanghai Municipal Engineering Design Insitute Group Co Ltd
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Abstract

The utility model belongs to the technical field of a soft soil foundation processing technology in geotechnical engineering and particularly relates to an arrangement structure of a device for processing a soft soil foundation in a coastal reclamation region. The soft soil foundation is formed by a soft soil layer and a rear blow-fill soil layer covering the soft soil layer; and the region comprises a deep processing region and a non-deep processing region. The utility model adopts the following specific scheme that a long plastic drain board extending to the blow-fill soil layer from the soft soil layer is arranged in the deep processing region; the height of the long plastic drain board is higher than the elevation of the blow-fill soil layer; and meanwhile, a short plastic drain board is arranged in the non-deep processing region. The arrangement structure has the advantages that by the arrangement structure, the aim of processing in place in one step can be fulfilled; in the blow-fill process, blow-fill soil can be used as a load and drainage consolidation settlement of the deep soft soil layer is accelerated by the long plastic drain board; meanwhile, vacuum preloading is carried out by vacuum preloading equipment; the problem of conventionally and repeatedly processing in place in steps to generate waste is reduced; and the aims of shortening the construction period and reducing cost are fulfilled.

Description

A kind of laying structure of the regional Soft Ground device of reclaiming fields from the sea
Technical field
The utility model belongs to Soft Soil Subgrade Treatment Techniques field in geotechnical engineering, is specifically related to a kind of laying structure of the regional Soft Ground device of reclaiming fields from the sea.
Background technology
At present, the mankind only have One Earth One Family, thereby land resources is extremely limited.Along with the urgency of world population increases, the expansion of activity space, the land resources in city is also more and more poorer, and the land resources in rural area must be considered to support the grain oil ﹠ vegetable arable land of numerous populations and requirement of forestry and must guarantee by emphasis, so urban construction can not account for the agriculture and forestry land used more.Country emphasizes: keep 18.8 hundred million mu of land farming resources, this is the police circles' line that can not break through when newly examining land resources.
For this reason, the developer can only transform the old urban area in cities and towns, and land resources is carried out secondary development, but because this is expensive land development, therefore also can runs into various technical barriers in land development and utilization and remain to be properly settled.Simultaneously, the exploitation amount of Support during Old City Reconstruction is also extremely limited.In coastal and river, river, lake, reclaiming fields from the sea in bank, creek waters, is another approach of urban construction Land Resources Exploitation.For example Holland implements one of country that reclaims fields from the sea in the world the earliest, and it is all to form like this that 2/3rds land resources are arranged, and Holland is world-famous windmill kingdom in addition, and the main Che Shuiyong when reclaiming fields from the sea of windmill; Japan just (is equivalent to 3,300 ten thousand m with annual 1000 ten thousand level grounds in phase early 1990s 2) extensive artificial land creating speed continue to push ahead.So large-scale artificial foundation is beyond example in the world, and this policy is still being carried out continuing.
China's shortage of land resource and rare be one of socio-economic development reality substantially.As 12 ends in 2004, Zhejiang Province government has issued " warm platform coastal industrial zone development plan ", the coastal construction of the industrial corridor of temperature platform formally raises the curtain, wherein land development stands in the breach, become the main path of land development and reclaim fields from the sea, according to the planning of Zhejiang Province government, the coastal industry of warm platform is with the enclosed and cultivated land used of nearly thousand square kilometres, and wherein only the Wenzhou City can enclose and cultivate land used and just reaches 448km 2After carrying out preliminary ground processing, will carry out municipal engineering construction.Large-scale municipal engineering construction is to the distortion of embankment and pipeline with stablely proposed higher requirement.
The affiliated landform unit in zone of reclaiming fields from the sea rushes marine plain for mostly being greatly littoral area's estuarine facies, and original weak soil is thick, and engineering geological condition is poor.Hydraulic reclamation carries out on original foundation, the underground Deep Thick Soft Ground that exists of roadway area, the above again preloading several meters thick barged-in fills.For stable all unfavorable with settlement Control.The barged-in fill soil property in hydraulic reclamation zone is poor, and water content is high; Bearing capacity of foundation soil after hydraulic reclamation is low; The modulus of resilience is all less; And sedimentation is complete stability not yet.Therefore, must carry out consolidation process targetedly to soft foundation in the regional Process of Engineering Construction of reclaiming fields from the sea, with stability and the minimizing settlement after construction that increases ground.The choice for use of soft base processing method all has important impact to workmanship, duration and economic benefit.
By extensive investigation and the comparative analysis to Base Consolidation Engineering such as domestic and international harbour, airport, roads, generally speaking, the scheme that the ground stabilization of the regional engineering of reclaiming fields from the sea is generally used at present, the most common with the scheme that puts in place in two steps: as to process first to carry out large tracts of land shallow-layer barged-in fill ground+carry out the deep layer soft soil foundation processing scheme as representative at road area afterwards, this type of scheme first step can reach the sedimentation of the basic elimination shallow-layer soil body, can satisfy the machinery construction requirement of marching into the arena; Second step reaches eliminates the sedimentation of the deep layer soil body to the impact of road, but long in time limit, and has carried out twice processing in the zone of need deep level of processing, has wasted the part manpower and materials.
In sum, how safe, quick, the economic Soft Ground of reclaiming fields from the sea is the Focal point and difficult point of engineering construction.Correlation experience and calculating empirical formula in view of this type of ground of present shortage is processed are difficult to Accurate Prediction solum settlement situation, so in conjunction with reclaiming fields from the sea area condition, propose not only reasonable but also economic suitable treatment of soft foundation scheme necessary.
Summary of the invention
the purpose of this utility model is according to above-mentioned the deficiencies in the prior art part, a kind of laying structure of the regional Soft Ground device of reclaiming fields from the sea is provided, this laying structure is by setting long plastic draining board in the deep level of processing zone, and set short plastic draining board in non-deep level of processing zone, the deep level of processing zone can utilize barged-in fill to accelerate the consolidation settlement of deep Soft Soil Layer as load during hydraulic reclamation, after hydraulic reclamation is completed, carry out vacuum preloading by the vacuum preloading equipment that is connected with described long plastic draining board again, reach with this purpose that deep level of processing is regional and the zone one step processing of non-deep level of processing puts in place, overcome tradition minute multistep and processed the shortcoming that puts in place.
The utility model purpose realizes being completed by following technical scheme:
A kind of laying structure of the regional Soft Ground device of reclaiming fields from the sea, described soft foundation is made of Soft Soil Layer and the after-blow fill stratum that is covered on described Soft Soil Layer, described zone comprises that deep level of processing is regional and non-deep level of processing is regional, it is characterized in that setting the long plastic draining board that extends to the hydraulic reclamation soil layer from described Soft Soil Layer in described deep level of processing zone, the height of described long plastic draining board is higher than described hydraulic reclamation soil layer absolute altitude; Set short plastic draining board in described non-deep level of processing zone.
Described hydraulic reclamation soil layer top is provided with horizontal sand cushion, and the height of described long and short plastic draining board is not more than the absolute altitude of described horizontal sand cushion, and the interval is embedded with chimney filter in described horizontal sand cushion.
The upper surface in described deep level of processing zone is provided with the preloading bed of material.
The utility model has the advantages that, by set long plastic draining board in the Soft Soil Layer in deep level of processing zone, and set short plastic draining board in the hydraulic reclamation soil layer in non-deep level of processing zone, overcome with this shortcoming that existing traditional deep level of processing is regional and the multistep processing in regional minute of non-deep level of processing puts in place, can utilize barged-in fill to accelerate the consolidation settlement of deep Soft Soil Layer as load during hydraulic reclamation, can process in a step and put in place, reduce the reprocessing that puts in place of tradition minute multistep and produced the problem of waste, reached the purpose of reduction of erection time, reduction cost.
Description of drawings
Fig. 1 is the structural representation of the utility model before hydraulic reclamation;
Fig. 2 is the structural representation of the utility model after hydraulic reclamation.
The specific embodiment
Feature of the present utility model and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
As Fig. 1-2, in figure, mark 1-8 is respectively: long plastic draining board 1, the preloading bed of material 2, sand cushion 3, short plastic draining board 4, Soft Soil Layer 5, hydraulic reclamation soil layer 6, non-deep level of processing zone 7, deep level of processing zone 8.
Embodiment: as shown in Figure 1, 2, the present embodiment is specifically related to a kind of laying structure of the regional Soft Ground device of reclaiming fields from the sea, wherein soft foundation is made of Soft Soil Layer 5 and the after-blow fill stratum 6 that is covered on Soft Soil Layer 5, the zone of reclaiming fields from the sea comprises deep level of processing zone 8 and non-deep level of processing zone 7, deep level of processing zone 8 is road area, therefore need to carry out deep layer soft soil foundation and process.This laying structure adopts long and short plastic draining board 1,4 in conjunction with the precompressed of vacuum preloading equipment combined stack-load material, regional one step of soft foundation of reclaiming fields from the sea to be processed and puts in place, namely set long plastic draining board 1 and with framed bent bamboo pole or steel pipe frame colligation together in the Soft Soil Layer 5 in deep level of processing zone 8, the reservation of long plastic draining board 1 highly exceeds hydraulic reclamation soil layer 6 absolute altitude 0.5m, set short plastic draining board 4 in the hydraulic reclamation soil layer 6 in non-deep level of processing zone 7, each zone all is connected with vacuum preloading equipment; Incorporation engineering need to arrange the preloading bed of material 2 on the vacuum diaphragm in deep level of processing zone simultaneously.
As shown in Figure 1, 2, step is as follows in the specific implementation for the laying structure in the present embodiment:
1. at first measure unwrapping wire; Removing Soft Soil Layer 5 top layers ploughs and plants soil, discharging fish pond water, removes floating the silt; Simultaneously by designing requirement leveling place.
2. 8 Soft Soil Layer 5 is interior in the deep level of processing zone vertically sets long plastic draining board 1, its length is 15~20m, plug simultaneously bamboo pole framed bent or steel pipe frame in Soft Soil Layer 5, described bamboo pole framed bent or steel pipe frame and long plastic draining board 1 lashing be in order to fixed length plastic draining board 1, the height of long plastic draining board 1 reserved exceed the hydraulic reclamation soil layer 6 design elevation 0.5m after hydraulic reclamation.
3. carry out the hydraulic reclamation operation on Soft Soil Layer 5, make the absolute altitude of hydraulic reclamation soil layer 6 reach the design elevation value, can utilize barged-in fill to accelerate the consolidation settlement of deep Soft Soil Layer 5 as load during hydraulic reclamation; And lay the thick sand cushion 3 of 20cm on hydraulic reclamation soil layer 6.
4. after treating that hydraulic reclamation soil layer 6 forms, 8 pull out described bamboo pole framed bent or steel pipe frame in the deep level of processing zone; Simultaneously 7 set short plastic draining board 4 in non-deep level of processing zone, the length of short plastic draining board 4 is 3~8m; Re-lay the thick sand cushion of second layer 20cm 3, dig the sealing ditch thereafter.
5. excavate thereafter the vacuum line groove, lay master, a chimney filter of level within it, vaccum-pumping equipment is installed and is buried underground the vacuum gauge head.
6. lay the first floor geotextiles on sand cushion 3, lay again subsequently two layers of diaphragm seal on described geotextiles; Go out described diaphragm seal and connect vaccum-pumping equipment, the described sealing ditch of backfill; Examination vacuumizes, and checks the sealing system performance; Lay afterwards second layer geotextiles; Absolute altitude before settlement observation staff, lateral displacement stake being set and measuring precompressed.
7. carry out vacuum preloading at Zone Full by described vaccum-pumping equipment, keep vacuum 80Kpa; In the deep level of processing zone 8, to lay the 3rd layer of sand cushion that 40cm is thick 3, and carry out the piling prepressing of the preloading bed of material 2 thereon, the preloading bed of material 2 loading speeds are unsuitable too fast, otherwise can cause foundation instability; By described settlement observation target observation, calculate that the soil solidifying degree can stop loading after reaching 90%.
8. continue observation skirt piles displacement and surface settlement; After soft foundation reached the predetermined degree of consolidation, construction finished.
Require specific as follows for the raw material device that adopts in the present embodiment:
(1) bamboo pole framed bent: should select hard tall and straight 10 cun or 12 cun bamboo poles, level is not less than 0.5m to lap length, and with ageing-resistantly, water-fast soak, corrosion resistant tough and tensile nylon rope colligation.
(2) horizontal sand cushion 3: sand used should be good, the scleroid medium coarse sand of grating, and mud content is less than 1%.
(3) vacuum preloading: vaccum-pumping equipment adopts jet vacuum pump, every precompressed zone (1500 ~ 2000m 2) two vacuum pumps are set at least.
The vacuum line tie point should strictly seal, and flap valve and pipe valve should be set, in order to avoid under film, vacuum reduces after termination of pumping very soon.
The chimney filter level adopts the forms such as comb teeth-shaped or featheriness to distribution.Chimney filter is arranged in sand mat of subgrade 3, and 100 ~ 200mm sand covering layer should be arranged on it.Chimney filter adopts plastic pipe, and pipe is outer around galvanized wire, the filtering materials such as outsourcing nylon yarn or geotextile.
Ageing resistace is good in order to adopt for diaphragm seal, good toughness, the special large tracts of land plastic sheeting of gas impermeable material that anti-penetration capacity is strong.The flat overlap joint that during the diaphragm seal heat seal, palpus stitches with two heat seals, lap length should be greater than 20mm.Diaphragm seal should be laid three layers, and the coverlay periphery can adopt ditching folding paving, tile and use the clay flanging, seal and cover methods such as comprehensively covering water on water and film in ditch and seal.More than under film, vacuum should remain on 80kPa.
(4) the preloading bed of material 2: the preloading bed of material 2 can make the slag of delaying, banket or water.
The slag of delaying used is the rubble after explosion, and particle diameter is larger, is native stone mixture, and greater than 70%, but the maximum particle diameter of stone is not more than 100mm to particle diameter greater than the stone content of 40mm;
Used banketing as banketing of being formed by one or more materials such as gravelly soil, sand, silt and cohesive soils, wherein free from foreign meter or seldom impure.
Institute's water is not acrid water; After beginning to vacuumize, the water that draws up can be guided on diaphragm seal and carry out piling prepressing as the preloading bed of material 2.
In the present embodiment and prior art, minute multistep is processed deep layer and is compared with the laying structure of the Soft Ground device in shallow-layer zone, can save the duration more than 8 months, and the expense of having saved especially the reprocessing road area is 150 yuan/m approximately 2
Originally the laying structure of regional Soft Ground device of reclaiming fields from the sea has obvious technical characterstic: by set long plastic draining board in the Soft Soil Layer in deep level of processing zone, and set short plastic draining board in the hydraulic reclamation soil layer in non-deep level of processing zone, overcome existing traditional deep level of processing zone and non-deep level of processing zone minute multistep is processed the shortcoming that puts in place with this, reduced the conventional minute multistep problem that reprocessing wastes that puts in place.With respect to the reclaim fields from the sea laying structure of regional municipal engineering Soft Ground device of tradition, settle the processing scheme cost saving at one go and reach closely 40%, and saved the duration more than 30%, economic and social benefits are very remarkable, and duration and the expense of this programme are obviously saved.In general, the regional municipal engineering treatment of soft foundation new concept of reclaiming fields from the sea that the present embodiment proposes, has novelty, and reached the reduction of erection time, reduced the purpose of cost, some blank in the domestic regional municipal engineering Soft Ground field of reclaiming fields from the sea have been filled up, the harmonious development of promoted to reclaim fields from the sea regional municipal engineering treatment of soft foundation and urban environment and natural resource.

Claims (3)

1. laying structure of regional Soft Ground device of reclaiming fields from the sea, described soft foundation is made of Soft Soil Layer and the after-blow fill stratum that is covered on described Soft Soil Layer, described zone comprises that deep level of processing is regional and non-deep level of processing is regional, it is characterized in that setting the long plastic draining board that extends to the hydraulic reclamation soil layer from described Soft Soil Layer in described deep level of processing zone, the height of described long plastic draining board is higher than described hydraulic reclamation soil layer absolute altitude; Set short plastic draining board in described non-deep level of processing zone.
2. the laying structure of a kind of regional Soft Ground device of reclaiming fields from the sea according to claim 1, it is characterized in that described hydraulic reclamation soil layer top is provided with horizontal sand cushion, the height of described long and short plastic draining board is not more than the absolute altitude of described horizontal sand cushion, and the interval is embedded with chimney filter in described horizontal sand cushion.
3. the laying structure of a kind of regional Soft Ground device of reclaiming fields from the sea according to claim 1 is characterized in that the upper surface in described deep level of processing zone is provided with the preloading bed of material.
CN 201220603319 2012-11-15 2012-11-15 Arrangement structure of device for processing soft soil foundation in coastal reclamation region Active CN202925540U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106192903A (en) * 2016-08-01 2016-12-07 中国建筑土木建设有限公司路桥分公司 Tidal-flat area land-based area forms the construction method building island

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106192903A (en) * 2016-08-01 2016-12-07 中国建筑土木建设有限公司路桥分公司 Tidal-flat area land-based area forms the construction method building island
CN106192903B (en) * 2016-08-01 2018-09-25 中国建筑土木建设有限公司路桥分公司 Tidal-flat area land-based area forms the construction method for building island

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