CN103993596B - A kind of box composite steel plate pile, vertical isolation engineering barrier and water-stop curtain - Google Patents
A kind of box composite steel plate pile, vertical isolation engineering barrier and water-stop curtain Download PDFInfo
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- CN103993596B CN103993596B CN201410129833.8A CN201410129833A CN103993596B CN 103993596 B CN103993596 B CN 103993596B CN 201410129833 A CN201410129833 A CN 201410129833A CN 103993596 B CN103993596 B CN 103993596B
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Abstract
The invention discloses a kind of box composite steel plate pile, vertical isolation engineering barrier and water-stop curtain, this box composite steel plate pile is made up of two hot rolling U-shaped steel sheet piles, two side plates, base plate and pump tubing length.The prefabricated flow process of box composite steel plate pile is as follows: be arranged in parallel two hot rolling U-shaped steel sheet piles; Side plate inserts the semi-circular fore shaft of hot rolling U-shaped steel sheet pile end by its semi-circular chute, is fixed on two hot rolling U-shaped steel sheet piles; Reinforcing bar is welded and fixed in one end of formed box body; Be welded and fixed continuation welding base plate on reinforcing bar.The present invention, with the prefabricated box composite steel plate pile of mode embedded, Type of Welding combines traditional hot rolling U-shaped steel sheet pile, significantly can reduce construction costs, shorten construction period; Comprehensively of many uses, be specially adapted to the urban industry contaminated site limiting cement material use; Control thickness and the material homogeneity of institute's constructing structure; Use traditional construction equipment, engineering method is easy, mechanization degree is high.
Description
Technical field
The invention belongs to construction of underground structure and environmental geotechnical technical field in geotechnical engineering, relate to a kind of box composite steel plate pile, vertical isolation engineering barrier and water-stop curtain.
Background technology
In recent years, due to national development strategy, economic restructuring demand, a large amount of industrial enterprise closes, resettlement turns factory, day by day manifests in its operation phase because " three wastes " deal with caused contaminated sites problem improperly.The soil base body of groundwater of former industrial sites and surrounding area thereof is subject to the pollution in wide area such as heavy metal, organic matter.On the other hand, because dripping liquid head severe overweight, bottom liner lost efficacy in municipal solid wastes landfill yard, and tailing dam all pollutes thing intrusion soil layer by precipitation affects etc. and spreads along Groundwater movement direction.The reparation that soil and body of groundwater pollute is thorough, sudden pollution accident etc. certainly will cause severe environments to destroy and social adverse effect, the such as Songhua River Pollution etc. of Jilin Chemical Shuan Ben factory.
Contaminated soil layer and body of groundwater have disguise, hysteresis quality, accumulation, be difficult to self-cleaning repair feature.At present artificial administer exist poor efficiency, cannot many limitation such as spread.Therefore, contaminated place, no matter whether carry out reclamation activities, the secondary barrier of contaminated site periphery seems particularly important.Global environment and technology foundation think that the engineering barrier of contaminated site periphery is the technology that an important restriction and even pollution abatement thing are migrated in soil layer.Engineering barrier can limit pollution site influence scope reduce the risk that pollutant enters geologic medium around effectively.Meanwhile, engineering barrier for the mankind find thoroughly, economical and efficiently contaminated site recovery technique provide the sufficient time and ensure.
Traditional quarantine measures comprise: agitation pile diaphragm wall, high-pressure rotary jet grouting pile, water-stop curtain, Artificial Frozen Soil barrier etc.The diaphragm wall of pile body form usually exist actual degree of engagement between stake low, there is crack defect between stake.Moreover piling wall or water-stop curtain are quoted from municipal civil engineering or the construction of traffic ground mostly, because its design original intention is intensity, stable, water sealing and seepage resistane, when therefore constructing, first-selected cement is as main material.For ubiquity organic pollution, heavy metal contaminants, sulfate ion, and the contaminated liquid of chlorion, mixing of cement may make wall damage aggravate.Meanwhile, be that the quarantine measures of main additive all exist workability with increasing the length of time with cement material; Reach steady operation sexual needs longer cycle, but during this, ability of body of wall opposing corrosion failure is lower, cannot meet salvaging demand.
For the isolated controlling project of urban industry contaminated site, strict restriction or refusal adopt cement material, and restriction vertical isolation engineering barrier width becomes one of main design requirement that current owner unit proposes.This is owing to using cement material, amplifying the design constraints of the vertical isolation engineering barrier of the width actual usage space of follow-up underground structure, causing the waste of valuable urban land resource.
It is a kind of isolation control method replacing traditional quarantine measures that soil-swell soil vertically isolates engineering barrier.Current construction method is realized by milling slot, material backfill.Construction technology mechanization degree is lower, may cause certain human error and caused quality problems thereof, is mainly reflected in the control of width of wall body, vertical verticality, and may occurs in digging process that soil box caves in.
In addition, soil-swell soil is vertically isolated swell soil volume in Engineering Barrier Materials and is subject to construction workability requirement restriction, and usual swell soil volume is no more than 15%.Swell soil self has extremely strong water-swellable performance, therefore when swell soil volume reaches or exceeds 15%, first meet water aquation swell soil part and will form fine and close parcel to non-aquation soil particle, cause soil-swell soil vertically to isolate the uneven and soil block of the aquation of Engineering Barrier Materials entirety to unite phenomenon, also cause construction mix difficulty.Meanwhile, under high swell soil volume condition, the mix of backfilling material and difficulty thereof, bentonitic loss amount huge (swell soil adheres to mixing plant) when adopting traditional mechanical stirring equipment.This also makes to have to strengthen retardance Contaminants Transport and improve the novel binder materials that soil-swell soil vertically isolates engineering barrier corrosion resistance and cannot be applied to practice of construction engineering.
Summary of the invention
Technical problem: the invention provides a kind of mechanization degree high, reduces the construction costs cost of vertical isolation engineering barrier, shortens the engineering time of vertical isolation engineering barrier, improves the box composite steel plate pile of construction quality.A kind of vertical isolation engineering barrier and the water-stop curtain that adopt above-mentioned box composite steel plate pile are provided simultaneously.
Technical scheme: box composite steel plate pile of the present invention, it is the hot rolling U-shaped steel sheet pile be arranged in parallel by two, the box-shaped precast part that two side plates and the base plate that can overturn downwards are formed, the two ends of side plate are provided with the contrary semi-circular chute of opening direction, side plate inserts the semi-circular fore shaft of hot rolling U-shaped steel sheet pile end by this semi-circular chute, be fixedly connected with hot rolling U-shaped steel sheet pile, be connected with between the base of two hot rolling U-shaped steel sheet piles be arranged in parallel and be spaced and the one group of reinforcing bar be positioned at above base plate, vertically isolate for making the gap that Engineering Barrier Materials falls into below between reinforcing bar.
In preferred version of the present invention, lay in advance and fix pumping flexible pipe in the inner chamber of box composite steel plate pile, box composite steel plate pile plugs after in soil layer, by pumping flexible pipe with vertically isolate Engineering Barrier Materials pumping equipment and be connected.
In preferred version of the present invention, base plate comprises flank shrouding and one-way turnover, flank shrouding is fixedly connected with the base of two side plates with a hot rolling U-shaped steel sheet pile, and a side of one-way turnover is flexibly connected with a side of flank shrouding, and can overturn downwards along this side.
In preferred version of the present invention, the spacing of two hot rolling U-shaped steel sheet piles is 70mm to 150mm.
The vertical isolation engineering barrier of employing of the present invention above-mentioned box composite steel plate pile, comprise multiple facades that head and the tail connect, facade is made up of multiple box composite steel plate pile connected successively, is connected and fixed between two adjacent box composite steel plate piles by the fore shaft of hot rolling U-shaped steel sheet pile end.
The water-stop curtain of the above-mentioned box composite steel plate pile of employing of the present invention, comprise multiple facades that head and the tail connect, facade is made up of multiple box composite steel plate pile connected successively, is connected and fixed between two adjacent box composite steel plate piles by the fore shaft of hot rolling U-shaped steel sheet pile end.
Adopt box composite steel plate pile of the present invention, carry out box composite steel plate pile, vertical isolation engineering barrier and water-stop curtain, comprise the following steps:
The first step: in the construction point position of contaminated site outer peripheral areas, the extending direction of vertically isolating engineering barrier plugs at least 5 box composite steel plate piles successively, two adjacent box composite steel plate piles connect in end, are provided with the pumping flexible pipe of vertically isolating Engineering Barrier Materials for pumping in the inner chamber of box composite steel plate pile;
Second step: extract first box composite steel plate pile plugged, vertically isolate Engineering Barrier Materials by pumping flexible pipe to pumping in the inner chamber of box composite steel plate pile simultaneously, in withdrawal process, base plate overturns downwards and opens, and vertical isolation Engineering Barrier Materials falls into soil layer;
3rd step: extract first box composite steel plate pile is plugged to the next construction point position adjacent with last box composite steel plate pile;
4th step: repeat the flow process of the first step to the 3rd step, until complete the construction of a vertical isolation engineering barrier facade;
5th step: according to the first step to the method for the 4th step, completes the construction of all facades of vertical isolation engineering barrier, and each facade head and the tail connect, and forms a complete vertical isolation engineering barrier.
In above-mentioned construction method of the present invention, vertical isolation Engineering Barrier Materials is mixed by the unpolluted in-situ soil of contaminated site periphery, swell soil and binder materials and forms.
In above-mentioned construction method of the present invention, the transmission coefficient of vertical isolation Engineering Barrier Materials requires to be less than 10
-9m/s.
In above-mentioned construction method of the present invention, the initial water content modulation of vertical isolation Engineering Barrier Materials is determined according to pumping equipment denseness control overflow in practice of construction.
Beneficial effect: compared with prior art, the present invention has the following advantages:
1. reduce the construction costs cost of vertical isolation engineering barrier.Vertical isolation Engineering Barrier Materials in the technical program adopts the mode of mechanical pumping to fill in underground layer, adopt box composite steel plate pile to have the advantage recycling, reclaim.Construction costs cost can be reduced to 1/2 to 1/4 than excavating equipment construction; Engineering time can be saved to 1/5; Engineering barrier width can be reduced to 1/2 to 1/3.
2. improve the shaping of vertical isolation engineering barrier rear material, size homogenieity, and the verticality of body of wall.Width in vertical isolation engineering barrier construction in the technical program, degree control are controlled by prefabricated box composite steel plate pile, have more quality control advantage than adopting the manual control of excavating equipment.
3. effectively the actual swell soil volume of engineering barrier is vertically isolated in raising, and construction technology is suitable for adding novel binder materials, thus vertical anti-permeability performance of isolating engineering barrier under improving contaminated liquid effect.Tradition milling slot, material backfill carry out soil-swell soil vertically isolate the construction technology of engineering barrier under swell soil volume be restricted, and the homogenieity of Engineering Barrier Materials cannot be ensured.All kinds of being suitable for, improves the binder materials blocking Contaminants Transport effect and corrosion resistance, because its denseness is comparatively large, is therefore also difficult to realize large-area applications by traditional construction technique.The invention provides a kind of construction method can passing through to add binding agent or increase the swell soil volume upper limit, and ensure that soil-swell soil vertically isolates the overall homogenieity of engineering barrier, and then strengthen impervious, retardance Contaminants Transport effect.
Accompanying drawing explanation
Fig. 1 is the position view of vertical isolation engineering barrier in the present invention and contaminated site.
Fig. 2 a is the box composite steel plate pile schematic diagram in the present invention.
Fig. 2 b is the box composite steel plate pile connected mode schematic diagram in the present invention.
Fig. 3 a to Fig. 3 d is the schematic flow sheet of construction method of the present invention.
Fig. 4 is the actual anti-permeability performance the result of vertical isolation Engineering Barrier Materials under lead nitrate solution effect using polyacrylamide as binder materials in the present invention.
Have in figure: contaminated site pollution sources 1, box composite steel plate pile 2, hot rolling U-shaped steel sheet pile 21, side plate 22, base plate 23, pumping flexible pipe 3, construction equipment 4, U-shaped steel sheet pile set equipment 41, U-shaped steel sheet pile pile pulling device 42, pumping equipment 43, vertical isolation engineering barrier 5, contaminated site scope 6, existing adjacent building 7.
Detailed description of the invention
Below in conjunction with Figure of description and embodiment, technical scheme of the present invention is described in detail.
Box composite steel plate pile mentioned in the present invention is made up of NSP-IIIw type hot rolling U-shaped steel sheet pile in Larsen steel sheet pile, also can require to change hot rolling U-shaped steel sheet pile type according to actual condition and construction equipment; Pollutant type comprises heavy metal contaminants, organic pollutant, and heavy metal-organic matter combined type pollutant.In the present invention, mentioned U-shaped steel sheet pile sets equipment 41, U-shaped steel sheet pile pile pulling device 42, and pumping equipment 43 is the conventional construction equipment of geotechnical engineering construction, can ensure operability of the present invention and popularization.
Figure 1 shows that the pollution sources 1 in soil layer caused by industrial pollution place or Solid Waste Landfills migrate to clean body of groundwater by the mode such as convection current, diffusion.Therefore can pass through box composite steel plate pile and serial construction equipment 4, adopt the measure of vertical isolation engineering barrier 5 to carry out control treatment, avoid periphery water, the soil body polluted; Existing adjacent building 7 underground structure is corroded.
Box composite steel plate pile in the present invention shown in Fig. 2 and on-link mode (OLM) schematic diagram thereof.To be that two isometric hot rolling U-shaped steel sheet piles are parallel combine box composite steel plate pile 2 main body.Two hot rolling U-shaped steel sheet pile 21 length, according to the processing of isolated controlling pollutant depth requirements, are generally 6 to 15m.Two hot rolling U-shaped steel sheet piles 21 are parallel to each other; Both sides are fixed by side plate 22; Bottom is fixed by base plate 23.
Lay pumping flexible pipe 3 in the inner chamber of box composite steel plate pile 2, vertically isolate Engineering Barrier Materials for pumping.By being fixed on hot rolling U-shaped steel sheet pile 21, to avoid pump to occur fold, knotting, or there is the phenomenons such as run-down in pumping flexible pipe 3.Spacing between two hot rolling U-shaped steel sheet piles controls as 70mm to 150mm.Wherein, for the more weak pollution sources of low concentration, corrosivity (such as, city slightly get dirty underground water), or time for the purpose of sealing, the spacing of two hot rolling U-shaped steel sheet piles can select 70mm to 100mm; On the contrary, for when there are high concentration, pollution sources (such as Landfills leachate, mine wastewater etc.) that corrosivity is high, then the spacing of two hot rolling U-shaped steel sheet piles should reach 150mm.Repair case with chemical plant, Jiangsu Province contaminated site isolated controlling, the spacing of two hot rolling U-shaped steel sheet piles is 110mm.
Box composite steel plate pile 2 is connected by the semi-circular fore shaft of single hot rolling U-shaped steel sheet pile 21 both sides each other, fixing.This connected mode belongs to traditional hot rolling U-shaped steel sheet pile connected mode, and construction technology is ripe.Therefore can be guaranteed in box composite steel plate pile click joint place service behaviour.
In a preferred embodiment of the present invention, base plate 23 comprises flank shrouding and one-way turnover, flank shrouding is fixedly connected with the base of two side plates 22 with a hot rolling U-shaped steel sheet pile 21, and a side of one-way turnover is flexibly connected with a side of flank shrouding, and can overturn downwards along this side.
Figure 3 shows that the schematic flow sheet of box composite steel plate pile in the present invention, vertical isolation engineering barrier and water-stop curtain.
The first step: in the construction point position of contaminated site outer peripheral areas, the extending direction of vertically isolating engineering barrier sets equipment 41 by U-shaped steel sheet pile and plugs 7 box composite steel plate piles 2 successively; Two adjacent box composite steel plate piles 2 are connected by the semi-circular fore shaft of hot rolling U-shaped steel sheet pile 21 both sides in end; The pumping flexible pipe 3 of vertically isolating Engineering Barrier Materials for pumping is provided with in the inner chamber of box composite steel plate pile 2; Joint occlusion in box composite steel plate pile between hot rolling U-shaped steel sheet pile and Pile arrangement consistent with traditional single hot rolling U-shaped steel sheet pile form of construction work (semi-circular fore shaft is connected).
Second step: extract first box composite steel plate pile plugged by U-shaped steel sheet pile pile pulling device 42, vertically isolates Engineering Barrier Materials through pumping flexible pipe 3 to pumping in the inner chamber of box composite steel plate pile by pumping equipment 43 simultaneously; In withdrawal process, base plate 23 upset is downwards opened, and vertical isolation Engineering Barrier Materials falls into soil layer; Pumping pressure and flow-control regulate according to the actual conditions of pumping equipment 43 and pile pulling speed.
3rd step: extract first box composite steel plate pile and again set equipment 41 by U-shaped steel sheet pile and plug to the next construction point position adjacent with last box composite steel plate pile;
4th step: repeat the flow process of the first step to the 3rd step, until the construction completing a vertical isolation engineering barrier facade;
5th step: according to the first step to the method for the 4th step, completes the construction of all facades of vertical isolation engineering barrier, and each facade head and the tail connect, and forms a complete vertical isolation engineering barrier.
Vertical isolation Engineering Barrier Materials is made up of the unpolluted in-situ soil of contaminated site periphery, swell soil and binding agent.The effect of binding agent is to improve the resistance to corrosion of engineering barrier under the effect of the pollutant such as heavy metal, salting liquid, and avoid anti-permeability performance to fail, carboxymethyl cellulose gum can be selected to stick the new material such as agent (CMC), polyacrylamide (PAM), also according to Practical Project barrier curring time, resistance to overturning can be ensured.Such as, the carboxymethyl cellulose gum adding 3 ‰ in sand-swell soil composite soil material sticks agent, the chemical compatibility of vertical isolation Engineering Barrier Materials can be improved, ensure the anti-permeability performance under pollutant effect, and make vertically to isolate in 2 hours that Engineering Barrier Materials is pumped to soil layer shaping rapidly.In addition, in conjunction with actual demand, Engineering Barrier Materials can add all kinds of cement material as water-stop curtain underground structure.
The proportioning (mass ratio of in-situ soil, swell soil, binding agent three) of vertical isolation Engineering Barrier Materials is less than 10 according to meeting vertical isolation Engineering Barrier Materials transmission coefficient
-9the designing requirement of m/s controls.Usually, under original position soil layer many sandy soils condition, it is 8% to 15% that swell soil volume controls; Under in original position soil layer, fine particle content reaches the condition of 40%, swell soil volume can suitably reduce, and is 5% to 10%.Binding agent volume, for CMC and PAM material, is generally 0.5 ‰ to 1%; Binding agent volume is too high will cause vertical isolation Engineering Barrier Materials pumping difficulties in construction.When constructing according to interpolation cement, cement mixing content should control as 30kg/m
3to 100kg/m
3.
Existing construction technology code or standard are to vertically isolation Engineering Barrier Materials desired consistency is not yet clear and definite, therefore in the present invention, the initial water content of vertical isolation Engineering Barrier Materials is modulated according to " Concrete Pumping Construction tecnical regulations " (JGJ/T 10-2011) and " Standard for test methods of properties of ordinary concrete mixture standard " (GB/T 50080-2002), slump value requirement corresponding to the pumping height of pumping equipment in practice of construction 43, ensures that material meets pumping desired consistency.Specifically, adopt the little aggregate concrete pump of conventional concrete pumping equipment HBTS15 type microlith as pumping equipment in the present invention 43, it is 50m that theoretical maximum fed distance horizontal and vertical is respectively 300m and 80m pumping height, then according to Concrete Pumping Construction schematic design requirement in " Concrete Pumping Construction tecnical regulations " (JGJ/T 10-2011), the slump for construction material requires as 100mm to 180mm.Therefore, according to the described slump experiment of " Standard for test methods of properties of ordinary concrete mixture standard " (GB/T 50080-2002), determine to meet the water content when construction material slump is 100mm to 180mm, as the initial water content before its pumping.
Be that simulation in-situ soil, polyacrylamide (PAM) are as binding agent with kaolin, choose Changzhou and produce sodium modified calcium-base swell soil, laboratory test checking is carried out to the impermeability of vertical isolation Engineering Barrier Materials under the effect of plumbi nitras contaminated liquid and chemical compatibility.Getting swell soil volume is 5%, and polyacrylamide (PAM) volume gets 0.5 ‰ and 1.0 ‰ respectively; Specimen coding " BiPAMj " represents that swell soil volume be i, PAM volume is j.Sample initial water content is adjusted to liquid limit, to ensure that in construction simulation process, vertical isolation Engineering Barrier Materials has certain mobility, meets construction pumping requirements.The plumbum ion concentration of plumbi nitras contaminated liquid is 60mmol/L.
Fig. 4 is the vertical isolation Engineering Barrier Materials anti-permeability performance the result under the effect of plumbi nitras contaminated liquid using polyacrylamide as binding agent in the present invention.Result of the test shows, and under identical void ratio e condition, two groups of samples all can ensure good anti-permeability performance under the corrosion function of heavy metal lead, and transmission coefficient (k) is less than 10
-9m/s.Demonstration test result shows, when being 5% with swell soil volume, the polyacrylamide (PAM) adding 0.5 ‰ to 1.0 ‰ can improve vertical seepage resistance demand and chemical compatibility of isolating Engineering Barrier Materials further as binding agent.
Above-described embodiment should be understood only for illustration of the detailed description of the invention of technical solution of the present invention, and be not used in and limit the scope of the invention.After having read the present invention, those skilled in the art are to the amendment of various equivalents of the present invention and replace the protection domain all falling within the application's claim and limit.
Claims (1)
1. a box composite steel plate pile, it is characterized in that, this steel sheet pile is by two hot rolling U-shaped steel sheet piles be arranged in parallel (21), the box-shaped precast part that two side plates (22) and the base plate (23) that can overturn downwards are formed, the two ends of side plate (22) are provided with the contrary semi-circular chute of opening direction, side plate (22) inserts the semi-circular fore shaft of hot rolling U-shaped steel sheet pile (21) end by described semi-circular chute, be fixedly connected with hot rolling U-shaped steel sheet pile (21), be connected with between the base of two hot rolling U-shaped steel sheet piles be arranged in parallel (21) and be spaced and the one group of reinforcing bar be positioned at above base plate (23), vertically isolate for making the gap that Engineering Barrier Materials falls into below between reinforcing bar.
2
.according to box composite steel plate pile according to claim 1, it is characterized in that, lay in advance in the inner chamber that described hot rolling U-shaped steel sheet pile (21), side plate (22) and base plate (23) surround and fix pumping flexible pipe (3).
3
.according to box composite steel plate pile according to claim 1, it is characterized in that, base plate (23) comprises flank shrouding and one-way turnover, flank shrouding is fixedly connected with the base of two side plates (22) with a hot rolling U-shaped steel sheet pile (21), one side of one-way turnover is flexibly connected with a side of flank shrouding, and can overturn downwards along this side.
4
.according to box composite steel plate pile according to claim 1, it is characterized in that, the spacing of described two hot rolling U-shaped steel sheet piles (21) is 70 mm to 150 mm.
5
.a kind of vertical isolation engineering barrier adopting box composite steel plate pile described in claim 1,2,3 or 4, it is characterized in that, this project barrier comprises multiple facades that head and the tail connect, described facade is made up of multiple box composite steel plate pile (2) connected successively, is connected and fixed between two adjacent box composite steel plate piles (2) by the fore shaft of hot rolling U-shaped steel sheet pile (21) end.
6
.a kind of water-stop curtain adopting box composite steel plate pile described in claim 1,2,3 or 4, it is characterized in that, this water-stop curtain comprises multiple facades that head and the tail connect, described facade is made up of multiple box composite steel plate pile (2) connected successively, is connected and fixed between two adjacent box composite steel plate piles (2) by the fore shaft of hot rolling U-shaped steel sheet pile (21) end.
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| CN201410129833.8A CN103993596B (en) | 2014-04-01 | 2014-04-01 | A kind of box composite steel plate pile, vertical isolation engineering barrier and water-stop curtain |
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| CN103993596B true CN103993596B (en) | 2015-09-09 |
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| JPH06128947A (en) * | 1992-10-16 | 1994-05-10 | Tokyu Constr Co Ltd | Construction method for steel-made underground continuous wall |
| JP2002285544A (en) * | 2001-03-26 | 2002-10-03 | Toyo Constr Co Ltd | Box-type steel sheet pile for use in cofferdam constructing method |
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| CN1869340A (en) * | 2005-05-23 | 2006-11-29 | 上海市第七建筑有限公司 | Combined box type steel sheet pile construction method of dock wall |
| CN101016742A (en) * | 2002-10-31 | 2007-08-15 | 住友金属工业株式会社 | Steel wall and the manufacture method thereof |
| CN203834461U (en) * | 2014-04-01 | 2014-09-17 | 东南大学 | Box-shaped composite steel sheet pile, vertical isolation engineering barrier and water-stop curtain |
-
2014
- 2014-04-01 CN CN201410129833.8A patent/CN103993596B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0431504A (en) * | 1990-05-29 | 1992-02-03 | Nippon Steel Corp | Construction method of continuous underground wall |
| JPH06128947A (en) * | 1992-10-16 | 1994-05-10 | Tokyu Constr Co Ltd | Construction method for steel-made underground continuous wall |
| JP2002285544A (en) * | 2001-03-26 | 2002-10-03 | Toyo Constr Co Ltd | Box-type steel sheet pile for use in cofferdam constructing method |
| CN101016742A (en) * | 2002-10-31 | 2007-08-15 | 住友金属工业株式会社 | Steel wall and the manufacture method thereof |
| CN1869340A (en) * | 2005-05-23 | 2006-11-29 | 上海市第七建筑有限公司 | Combined box type steel sheet pile construction method of dock wall |
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