CN104018487A - Vacuum preloading shallow-layer solidification device based on newly-reclaimed ultra-soft soil foundation and method of device - Google Patents
Vacuum preloading shallow-layer solidification device based on newly-reclaimed ultra-soft soil foundation and method of device Download PDFInfo
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- CN104018487A CN104018487A CN201410275426.8A CN201410275426A CN104018487A CN 104018487 A CN104018487 A CN 104018487A CN 201410275426 A CN201410275426 A CN 201410275426A CN 104018487 A CN104018487 A CN 104018487A
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Abstract
The invention relates to a vacuum preloading shallow-layer solidification device based on a newly-reclaimed ultra-soft soil foundation. The vacuum preloading shallow-layer solidification device is characterized by comprising a first woven fabric layer, a second vitex-fence layer, a third non-woven fabric layer, a plurality of sets of drainage plates, a drainage filtering pipe, a fourth geogrid layer, a fifth non-woven fabric layer and two layers of sealing films, wherein the first woven fabric layer, the second vitex-fence layer, the third non-woven fabric layer, the drainage plates, the drainage filtering pipe, the fourth geogrid layer, the fifth non-woven fabric layer and the two layers of sealing films are laid on the upper surface of the newly-reclaimed ultra-soft soil foundation in sequence, a sealed cavity is defined by the sealing films and the newly-reclaimed ultra-soft soil foundation in an enclosed mode; the outside of the sealed cavity is connected with a vacuumizing device. A method for conducting vacuum preloading shallow-layer solidification on the newly-reclaimed ultra-soft soil foundation through the shallow-layer solidification device comprises the following steps that (1) the vacuum solidification device is arranged on the newly-reclaimed ultra-soft soil foundation; (2) vacuumizing is carried out for a certain period of time, so that shallow-layer soil obtains definite bearing capacity rapidly. From the fundamental starting point that a silt reclamation force-holding work cushion layer is omitted, shallow-layer reinforcing technology is innovated so that construction of hitting and installing of a plastic drainage plate on a deep layer in a vacuum preloading mode can be satisfied without the need of silt reclamation after shallow-layer reinforcing is carried out.
Description
Technical field
The invention belongs to super soft ground reinforcing technique field, particularly relate to a kind of based on new hydraulic reclamation super soft ground vacuum preloading shallow-layer solidification equipment and method thereof.
Background technology
Along with the fast development of China's Coastal Areas economy, land resources growing tension, utilizes and carries out ground stabilization after basin and waterway dredging soil land reclamation again and become the Main Means of alleviating shortage of land resource.Because the dredging soil soil property of hydraulic reclamation mostly recently is mud, its moisture content exceedes 100%, and void ratio is greater than 2.0, and outward appearance is mud scum～stream mud shape, and not yet formation has the soil skeleton structure of intensity, and bearing capacity is almost nil.In the face of super soft ground like this, the main vacuum method that adopts is carried out consolidation process at present.In vacuum method construction technology, setting plastic draining board needs the special equipment that re-packs, and this equipment belongs to heavy-duty machinery, and weight is about 10-15 ton.How the mire forming at new hydraulic reclamation dredging soil re-packs to construct and becomes the key issue of ground processing, mainly comprises following several method at present for this problem:
The one, the equipment modification that re-packs of conventional rail mounted is become to crawler type, operation directly re-pack in the mire that can form at new hydraulically filled sludge.In the method, transform the equipment cost that re-packs higher, the equipment of re-packing after repacking can only fall back and construct in addition, and efficiency of construction is lower, easily causes disturbance to destroy to completing the region re-packing, and in the process that re-packs, anti-mud situation is serious, and follow-up vacuum preloading construction is had a certain impact.
The 2nd, allow mire that new hydraulic reclamation dredging soil forms first through airing after a while, make its top layer there is the crust layer of certain bearing capacity by the fixed formation of natural sediment, the more common working cushion layer that meets the equipment construction that re-packs that forms of the flour sand bed course of hydraulic reclamation 80cm～100cm.
The 3rd, on the mire forming at new hydraulic reclamation dredging soil, carry out the processing of shallow-layer vacuum preloading by artificial plate, make its top layer form one deck to have the crust layer of some strength and thickness, and then the common working cushion layer that meets the equipment construction that re-packs that forms of the flour sand of hydraulic reclamation 80cm～100cm.
Method two and method three all need can meet by the certain thickness flour sand bed course of hydraulic reclamation the requirement of the construction working bed course that re-packs, but due to transition exploitation and the use of flour sand in recent years, flour sand resource is more and more in short supply at present, and the construction of hydraulic reclamation flour sand is subject to weather effect larger, usually need long period of time just can complete, this certainly will make construction costs and duration be difficult to ensure.
In view of above three kinds of construction technologies are to super soft ground stabilization works cost, quality and the Different Effects of duration, we work out one " without sand working cushion layer " vacuum method, can make also can form without hydraulic reclamation flour sand the working cushion layer that meets follow-up plant equipment construction after shallow layer reinforcement processing.Allow vacuum pre-press reinforcing no longer disturbed in flour sand resource, duration and strengthening quality are all effectively ensured.
Summary of the invention
The present invention is fundamental starting point for the technical problem existing in solution known technology provides a kind of cancellation hydraulic reclamation flour sand to hold power working cushion layer, by innovation shallow layer reinforcement technical scheme, shallow layer reinforcement is processed after without hydraulic reclamation flour sand also can meet deep vacuum precompressed set plastic draining board construction based on new hydraulic reclamation super soft ground vacuum preloading shallow-layer solidification equipment and method thereof.
The technical scheme that the present invention takes for the technical problem existing in solution known technology is:
A kind of based on new hydraulic reclamation super soft ground vacuum preloading shallow-layer solidification equipment, it is characterized in that: shallow-layer solidification equipment is mainly included in the first floor establishment layer of cloth that new hydraulic reclamation super soft ground upper surface is laid; The second layer chaste tree basketry layer of laying at base fabric upper surface, the 3rd layer of nonwoven layer of laying at chaste tree basketry upper surface;
On above-mentioned new hydraulic reclamation super soft ground, lay on the basis of three layer construction, along the array band drain that on new hydraulic reclamation super soft ground, vertical direction is provided with, the degree of depth of described drainage plate striking is 4.5m; Group band drain comprises the main band drain of four quadrate layouts and is positioned at the auxiliary band drain at square center; Between main band drain, spacing is 0.8～1.0m, and between main band drain and auxiliary band drain, spacing is 0.56～0.71m;
The equal colligation in end of the array band drain of above-mentioned laying each band drain in the same direction, at same drainage pipe, forms several single single structures of considering;
Be equipped with the 4th layer of geogrids layer at the upper surface of above-mentioned single single chimney filter structure;
Upper surface the 4th layer of geogrids layer is laid layer 5 nonwoven layer;
Lay two-layer diaphragm seal at the upper surface of layer 5 nonwoven layer, described diaphragm seal and above-mentioned new hydraulic reclamation super soft ground enclose the cavity of a sealing, and above-mentioned first floor base fabric, second layer chaste tree basketry layer, the 3rd layer of nonwoven layer, the 4th layer of geogrids layer, layer 5 nonwoven layer and colligation are at the drainage pipe of band drain end;
The cavity of above-mentioned sealing connects vacuum extractor outward.
Utilize said apparatus based on new hydraulic reclamation super soft ground vacuum preloading shallow-layer curing,
1), on new hydraulic reclamation super soft ground, vacuum solidification device is set;
A, the first floor establishment layer of cloth of laying at new hydraulic reclamation super soft ground upper surface; Two adjacent base fabric lap widths are not less than 10cm; And adopt double line overlap overseam to connect;
B, the second layer chaste tree basketry layer of laying at base fabric upper surface;
C, the 3rd layer of nonwoven layer of laying at chaste tree basketry upper surface; Two adjacent base fabric lap widths are not less than 20cm, and adopt double line overlap overseam to connect;
D, on above-mentioned new hydraulic reclamation super soft ground, lay on the basis of three layer construction, along the band drain that on new hydraulic reclamation super soft ground, vertical direction plugs; Intercepting according to actual needs of band drain, its end asphalt sealing, the degree of depth of described drainage plate striking is 4.5m; Every group of band drain comprises the main band drain and the auxiliary band drain that is positioned at square center of four quadrate layouts, and between main band drain, spacing is 0.8～1.0m, and between main band drain and auxiliary band drain, spacing is 0.56～0.71m.
The equal colligation in end of the array band drain of e, above-mentioned laying each band drain in the same direction, at same drainage pipe, forms several single single structures of considering;
F, be equipped with the 4th layer of geogrids layer at the upper surface of above-mentioned single single chimney filter structure;
G, lay layer 5 nonwoven layer at the upper surface of above-mentioned the 4th layer of geogrids layer;
H, lay two-layer diaphragm seal at the upper surface of layer 5 nonwoven layer;
I, lay several vacuum extractors;
2), vacuumize during the control of turn on pump rate; During vacuumizing, be divided into two stages, try the stage of bleeding, formally bleed the stage;
A, divide three batches of circulations to open vacuum extractors in the examination stage of bleeding, first opens 1/3 vacuum extractor, and second batch is opened 2/3 vacuum extractor, opens whole vacuum extractors for the 3rd batch.Every batch of duration is after vacuum reaches 60KPa and stablizes 72 hours, to proceed to formally and bleed the stage for 5 days.；
B, formally bleed the stage, require vacuum extractor all to open, guarantee that vacustat is more than 60KPa, continuing to vacuumize the dead load time is 40～50 days; ;
C, formally bleed and carry out four-bladed vane detection on the 20th day, require soil body average strength within the scope of the 2.0～3.0m of ground top layer to be greater than 10kPa, continue to bleed if do not reach, within every 10 days, carry out a four-bladed vane and detect, intensity reaches rear unloading.
Advantage and good effect that the present invention has are: because the present invention adopts technique scheme, the present invention is had the following advantages:
1, illustrate according to " vacuum preloading tecnical regulations JTS147-2-2009 ", in the time that plastic draining distance between plates is less than 0.7m, very large to the disturbance of ground, plastic draining board sets expense to be increased more, and the minimizing of consolidation time not obvious, the plastic draining distance between plates that therefore vacuum preloading is conventional should be not less than 0.7m.And the present invention finds by research, in the time that processing vacuum preloading, shallow-layer further reduces plastic draining distance between plates, adopt square center lock pin to arrange, spacing between main band drain and auxiliary band drain is 0.56～0.71m, encryption drainage pipe is laid, and adopt single single tube structure, can in identical consolidation time, soil strength be improved rapidly, and after reinforcing, soil body four-bladed vane intensity increase by 4～5 times compared with traditional handicraft.
2, the clear and definite unloading index of shallow-layer vacuum preloading, requires shallow-layer to process within the scope of the 2.0～3.0m of groundwork top layer soil body average strength and is greater than 10kPa and can unloads.After guaranteeing that shallow-layer is processed, to hold under power flour sand bed course operating mode in nothing, bearing capacity of foundation soil also can meet the requirement of ram machine construction, has increased the safety guarantee coefficient of the construction that re-packs.
3, band drain is connected with chimney filter by carry out " parcel entirely " colligation from zip, more traditional connected mode is convenient, firm, ensure combining closely of plastic draining board and chimney filter, effectively reduced loss when vacuum passes to band drain by chimney filter, strengthened the consolidation effect of vacuum preloading.
In sum, the present invention mainly holds power working cushion layer as fundamental starting point to cancel hydraulic reclamation flour sand, by innovation shallow layer reinforcement technical scheme, also can meet deep vacuum precompressed and set the construction of plastic draining board after shallow layer reinforcement is processed without hydraulic reclamation flour sand.Allow vacuum pre-press reinforcing no longer be limited by flour sand, significantly reduce the use of flour sand resource, reduced to a certain extent construction costs and shortened the duration and also can avoid because of the resource environmental disruption that too much exploitation causes.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is plan structure schematic diagram of the present invention
Fig. 3 is every group of band drain distributed architecture schematic diagram;
Fig. 4 is drainage pipe and band drain syndeton schematic diagram.
In figure: 1, base fabric; 2, chaste tree basketry layer; 3, nonwoven layer; 4, band drain; 4-1, main band drain; 4-2, auxiliary band drain; 5, drainage pipe; 6, geogrids layer; 7, nonwoven layer; 8, diaphragm seal; 9, vacuum extractor.
Detailed description of the invention
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1 to Fig. 4, a kind of based on new hydraulic reclamation super soft ground vacuum preloading shallow-layer solidification equipment, shallow-layer solidification equipment is mainly included in the first floor establishment layer of cloth 1 that new hydraulic reclamation super soft ground upper surface is laid; The second layer chaste tree basketry layer 2 of laying at base fabric upper surface, the 3rd layer of nonwoven layer 3 of laying at chaste tree basketry upper surface;
On above-mentioned new hydraulic reclamation super soft ground, lay on the basis of three layer construction, along the array band drain 4 that on new hydraulic reclamation super soft ground, vertical direction is provided with, the depth H 1 of described drainage plate striking is 4.5m; Every group of band drain comprises the main band drain 4-1 and the auxiliary band drain 4-2 that is positioned at square center of four quadrate layouts; Here main band drain and auxiliary band drain all have same drain function, and the name is here only for ease of distinguishing.Between main band drain, spacing H2 is 0.8～1.0m, and between main band drain and auxiliary band drain, spacing H3 is 0.56～0.71m.
The equal colligation in end of the array band drain of above-mentioned laying each band drain 4 in the same direction, at same drainage pipe 5, forms several single single structures of considering; Adopt the mode of single single tube that chimney filter is directly connected with band drain.Plastic draining board is connected and uses from zip colligation with chimney filter " parcel entirely ".By carry out " parcel entirely " colligation from zip, ensure combining closely of plastic draining board and chimney filter, effectively reduce loss when vacuum passes to band drain by chimney filter, strengthen the consolidation effect of vacuum preloading.
Be equipped with the 4th layer of geogrids layer 6 at the upper surface of above-mentioned single single chimney filter structure;
Upper surface the 4th layer of geogrids layer is laid layer 5 nonwoven layer 7;
Lay two-layer diaphragm seal 8 at the upper surface of layer 5 nonwoven layer, described diaphragm seal and above-mentioned new hydraulic reclamation super soft ground enclose the cavity of a sealing, and above-mentioned first floor base fabric, second layer chaste tree basketry layer, the 3rd layer of nonwoven layer, the 4th layer of geogrids layer, layer 5 nonwoven layer and colligation are at the drainage pipe of band drain end;
The cavity of above-mentioned sealing connects vacuum extractor 9 outward.
Utilize said apparatus based on new hydraulic reclamation super soft ground vacuum preloading shallow-layer curing,
1), on new hydraulic reclamation super soft ground, vacuum solidification device is set;
A, the first floor establishment layer of cloth of laying at new hydraulic reclamation super soft ground upper surface; Two adjacent base fabric lap widths are not less than 10cm; And adopt double line overlap overseam to connect;
B, the second layer chaste tree basketry layer of laying at base fabric upper surface;
C, the 3rd layer of nonwoven layer of laying at chaste tree basketry upper surface; Two adjacent base fabric lap widths are not less than 20cm, and adopt double line overlap overseam to connect;
D, on above-mentioned new hydraulic reclamation super soft ground, lay on the basis of three layer construction, along the band drain that on new hydraulic reclamation super soft ground, vertical direction plugs; The degree of depth of described drainage plate striking is 4.5m; Every group of band drain comprises the main band drain 4-1 and the auxiliary band drain 4-2 that is positioned at square center of four quadrate layouts; Between main band drain, spacing is 0.8～1.0m, and between main band drain and auxiliary band drain, spacing is 0.56～0.71m.Manually plug plastic draining board: before construction, first, according to designing construction depth and exposing size, plastic draining board is cut into short slab.Then by one end wrench asphalt sealing, be mainly to prevent from causing drainage channel to stop up from band drain termination intake panel core in the stream mud at the bottom of plate in negative pressure ventilation process.Also need carry out construction lofting according to the spacing that re-packs of designing requirement, at the enterprising line identifier in the position that plugs in advance plastic draining board simultaneously.In plate process, to supervise workman band drain is inserted to desired depth, and check whether spacing meets design requirement, find the situation of the excessive or no marking of spacing, require in time to carry out complement.
The equal colligation in end of the array band drain of e, above-mentioned laying each band drain in the same direction, at same drainage pipe, forms several single single structures of considering;
F, be equipped with the 4th layer of geogrids layer at the upper surface of above-mentioned single single chimney filter structure;
G, lay layer 5 nonwoven layer at the upper surface of above-mentioned the 4th layer of geogrids layer;
H, lay two-layer diaphragm seal at the upper surface of layer 5 nonwoven layer;
I, lay several vacuum extractors;
When above-mentioned laying vacuum plant, the woven cloth of laying and nonwoven are not only for the personnel of subsequent handling construction provide operation side necessary, that have certain safety guarantee, also top layer mud scum and plastic draining wrench and horizontal drainage pipeline can be separated, be favourable to the permeability that ensures draining networking.Before woven cloth and geotextile laying, be first stitched at the scene entirety with portable sewing machine, it is tight that seam is wanted, and prevents that mud from emerging from seam crossing.In process of deployment, should ensure to lay smooth as far as possible and carry out in time ballast, preventing that it from being started or being subjected to displacement by wind.
2), vacuumize during the control of turn on pump rate; During vacuumizing, be divided into two stages, bleed stage, full pump of examination loads and bleeds the stage;
A, divide three batches of circulations to open vacuum extractors in the examination stage of bleeding, first opens 1/3 vacuum extractor, and second batch is opened 2/3 vacuum extractor, opens whole vacuum extractors for the 3rd batch.Every batch of duration is after vacuum reaches 60KPa and stablizes 72 hours, to proceed to formally and bleed the stage for 5 days.；
B, formally bleed the stage, require vacuum extractor all to open, guarantee that vacustat is more than 60KPa, continuing to vacuumize the dead load time is 40～50 days; ;
C, formally bleed and carry out four-bladed vane detection on the 20th day, require soil body average strength within the scope of the 2.0～3.0m of ground top layer to be greater than 10kPa, continue to bleed if do not reach, within every 10 days, carry out a four-bladed vane and detect, intensity reaches rear unloading.
Because the present invention adopts technique scheme, the present invention is had the following advantages:
1, illustrate according to " vacuum preloading tecnical regulations JTS147-2-2009 ", in the time that plastic draining distance between plates is less than 0.7m, very large to the disturbance of ground, plastic draining board sets expense to be increased more, and the minimizing of consolidation time not obvious, the plastic draining distance between plates that therefore vacuum preloading is conventional should be not less than 0.7m.And the present invention finds by research, in the time that processing vacuum preloading, shallow-layer further reduces plastic draining distance between plates, and the present invention finds by research, in the time that processing vacuum preloading, shallow-layer further reduces plastic draining distance between plates, adopt square center lock pin to arrange, spacing between main band drain and auxiliary band drain is 0.56～0.71m, encryption drainage pipe is laid, and adopt single single tube structure, can in identical consolidation time, soil strength be improved rapidly, and after reinforcing, soil body four-bladed vane intensity increase by 4～5 times compared with traditional handicraft.
2, the clear and definite unloading index of shallow-layer vacuum preloading, requires shallow-layer to process within the scope of the 2.0～3.0m of groundwork top layer soil body average strength and is greater than 10kPa and can unloads.After guaranteeing that shallow-layer is processed, to hold under power flour sand bed course operating mode in nothing, bearing capacity of foundation soil also can meet the requirement of ram machine construction, has increased the safety guarantee coefficient of the construction that re-packs.
3, band drain is connected with chimney filter by carry out " parcel entirely " colligation from zip, more traditional connected mode is convenient, firm, ensure combining closely of plastic draining board and chimney filter, effectively reduced loss when vacuum passes to band drain by chimney filter, strengthened the consolidation effect of vacuum preloading.
In sum, the present invention mainly holds power working cushion layer as fundamental starting point to cancel hydraulic reclamation flour sand, by innovation shallow layer reinforcement technical scheme, also can meet deep vacuum precompressed and set the construction of plastic draining board after shallow layer reinforcement is processed without hydraulic reclamation flour sand.Allow vacuum pre-press reinforcing no longer be limited by flour sand, significantly reduce the use of flour sand resource, reduced to a certain extent construction costs and shortened the duration and also can avoid because of the resource environmental disruption that too much exploitation causes.
The above is only to preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, every foundation technical spirit of the present invention is to any simple modification made for any of the above embodiments, and equivalent variations and modification, all belong in the scope of technical solution of the present invention.
Claims (2)
1. based on a new hydraulic reclamation super soft ground vacuum preloading shallow-layer solidification equipment, it is characterized in that: shallow-layer solidification equipment is mainly included in the first floor base fabric that new hydraulic reclamation super soft ground upper surface is laid; On base fabric, lay second layer chaste tree basketry layer, on chaste tree basketry layer, lay the 3rd layer of nonwoven layer;
On above-mentioned new hydraulic reclamation super soft ground, lay on the basis of three layer construction, plug array band drain along vertical direction on new hydraulic reclamation super soft ground, the degree of depth that described band drain plugs is 4.5m; Every group of band drain comprises the main band drain and the auxiliary band drain that is positioned at square center of four quadrate layouts, and between main band drain, spacing is 0.8～1.0m, and between main band drain and auxiliary band drain, spacing is 0.56～0.71m.
The end of the array band drain of above-mentioned laying each band drain in the same direction all with same drainage pipe colligation, form several single single filter structures;
Be equipped with the 4th layer of geogrids layer at the upper surface of above-mentioned single single chimney filter structure;
Upper surface the 4th layer of geogrids layer is laid layer 5 nonwoven layer;
Lay two-layer diaphragm seal at the upper surface of layer 5 nonwoven layer, described diaphragm seal and above-mentioned new hydraulic reclamation super soft ground enclose the cavity of a sealing, and the cavity of above-mentioned sealing connects vacuum extractor outward.
2. based on a new hydraulic reclamation super soft ground vacuum preloading shallow-layer curing, it is characterized in that:
1), on new hydraulic reclamation super soft ground, vacuum solidification device is set;
A, the first floor establishment layer of cloth of laying at new hydraulic reclamation super soft ground upper surface; Two adjacent base fabric lap widths are not less than 10cm; And adopt double line overlap overseam to connect;
B, the second layer chaste tree basketry layer of laying at base fabric upper surface;
C, the 3rd layer of nonwoven layer of laying at chaste tree basketry upper surface; Two adjacent base fabric lap widths are not less than 20cm, and adopt double line overlap overseam to connect;
D, on above-mentioned new hydraulic reclamation super soft ground, lay on the basis of three layer construction, along the band drain that on new hydraulic reclamation super soft ground, vertical direction plugs; Intercepting according to actual needs of band drain, its end asphalt sealing, the degree of depth of described drainage plate striking is 4.5m; Every group of band drain comprises the main band drain and the auxiliary band drain that is positioned at square center of four quadrate layouts, and between main band drain, spacing is 0.8～1.0m, and between main band drain and auxiliary band drain, spacing is 0.56～0.71m.
The end of the array band drain of e, above-mentioned laying each band drain in the same direction all adopts full package structure colligation on same drainage pipe, forms several single single filter structures;
F, be equipped with the 4th layer of geogrids layer at the upper surface of above-mentioned single single chimney filter structure;
G, lay layer 5 nonwoven layer at the upper surface of above-mentioned the 4th layer of geogrids layer;
H, lay two-layer diaphragm seal at the upper surface of layer 5 nonwoven layer;
I, lay several vacuum extractors;
2), vacuumize during the control of turn on pump rate; During vacuumizing, be divided into two stages, try the stage of bleeding, formally bleed the stage;
A, divide three batches of circulations to open vacuum extractors in the examination stage of bleeding, first opens 1/3 vacuum extractor, and second batch is opened 2/3 vacuum extractor, opens whole vacuum extractors for the 3rd batch.Every batch of duration is after vacuum reaches 60KPa and stablizes 72 hours, to proceed to formally and bleed the stage for 5 days.
B, formally bleed the stage, require vacuum extractor all to open, guarantee that vacustat is more than 60KPa, continuing to vacuumize the dead load time is 40～50 days;
C, formally bleed and carry out four-bladed vane detection on the 20th day, require soil body average strength within the scope of the 2.0～3.0m of ground top layer to be greater than 10kPa, continue to bleed if do not reach, within every 10 days, carry out a four-bladed vane and detect, intensity reaches rear unloading.
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| CN108729462A (en) * | 2017-04-20 | 2018-11-02 | 连云港港口工程设计研究院有限公司 | A kind of rapidly solidified method in blowing-filling sludge soft base surface layer |
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| CN108729462A (en) * | 2017-04-20 | 2018-11-02 | 连云港港口工程设计研究院有限公司 | A kind of rapidly solidified method in blowing-filling sludge soft base surface layer |
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