CN101914925A - Basement by using optimized composite prefabricated arch wall as external wall - Google Patents

Basement by using optimized composite prefabricated arch wall as external wall Download PDF

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CN101914925A
CN101914925A CN2010102523091A CN201010252309A CN101914925A CN 101914925 A CN101914925 A CN 101914925A CN 2010102523091 A CN2010102523091 A CN 2010102523091A CN 201010252309 A CN201010252309 A CN 201010252309A CN 101914925 A CN101914925 A CN 101914925A
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arch
basement
prefabricated arch
composite prefabricated
construction
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CN101914925B (en
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王胜利
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LANZHOU NANTE DIGITAL TECHNOLOGY Co Ltd
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LANZHOU NANTE DIGITAL TECHNOLOGY Co Ltd
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Abstract

The invention discloses a basement by using an optimized composite prefabricated arch wall as an external wall. The basement comprises the external wall, basement upright posts/upright post piles, a horizontal supporting beam, a connecting beam/ring beam/lintel, a floor, a foundation and a bottom basement bottom plate, and is characterized in that the basement also comprises an inverted arch slab below the bottom basement bottom plate, wherein the external wall is the optimized composite prefabricated arch wall consisting of a prefabricated arch wall and a cast-in-place water-proof concrete wall; the connecting beam/ring beam/lintel is fixed on the optimized composite prefabricated arch wall of the floor; a drain pipe is previously buried in the connecting beam/ring beam/lintel; the foundation is a strip-shaped foundation which is positioned at the bottom of the optimized composite prefabricated arch wall and provided with a drain groove; the foundation is butted with the inverted arch slab; the concave surface of the inverted arch slab faces the bottom basement bottom plate; and a water drainage channel is formed between the foundation and the inverted arch slab and communicated with a water collection tank. The optimized composite prefabricated arch wall is combined with an underground main structure of a high-rise building, so the problems such as supporting and load bearing, construction safety, displacement prevention and the like can be solved, the money spent for supporting a foundation pit is halved, and low resource consumption and low energy consumption are ensured.

Description

Utilize the basement of optimizing composite prefabricated arch wall as external wall
Patent application of the present invention is to divide an application; Be be that November 19, application number in 2008 are 200810182255.9 the applying date, the dividing an application of application for a patent for invention that denomination of invention is the compound arch wall of optimization that combines with agent structure of precast arch piece, supporting.Technical field the invention belongs to construction work member field and highrise building or underground building foundation pit supporting construction category, particularly relates to a kind of multifunctional precast arch piece; The invention still further relates to multi-functional space enclosing structure and underground agent structure exterior walls such as having carrying, supporting, the compound arch wall of optimization that specifically a kind of supporting and protection structure combines with agent structure the invention still further relates to and utilizes the basement of optimizing composite prefabricated arch wall as external wall.
The background technology building unit is prefabricated to be the important symbol of Building technology development, also is the inexorable trend of production-line style construction.But present prefabricated units function singleness, interchangeability is poor, is unfavorable for the raising of large-scale industrial production and quality, benefit.
Traditional Base hole supporting technology is by means such as retaining wall, support, rock-reinforcings, reaches retaining soil, waterproof, antiseepage, prevents displacement, the purpose that creates good conditions for main structure construction.Along with the also increase day by day of the underground degree of depth of China's building, deep foundation pit technology grows up thereupon.In the ten big technology of Ministry of Construction's popularization in 2005, deep foundation pit support comprises composite soil nailing wall support technology, prestressed anchor construction technology, combination interior support technology, shaped steel cement-soil compound agitation pile supporting and protection structure technology and freezes the campshed law technology, but ubiquity takes up an area of greatly, investment is many, equipment requires high deficiency.In April, 2008; the Department of Science and Technology; the Ministry of Construction is for promoting; the construction design and construction of guiding and standard China deep excavation project; started Eleventh Five-Year Plan science and technology support plan key project " research of underground excavation project rock-reinforcing key technology "; comprise base pit engineering key technology and method research; foundation ditch groundwater control method and monitoring of leakage technical research; pattern foundation pit supporting structure new technology and new material research; pattern foundation pit supporting structure is optimized integrated system and four problems of deep big foundation pit engineering demonstration; purpose is a collection of base pit engineering designs with independent intellectual property right of research and development; construction; monitoring technology and method, the minimizing accident of proposition one cover comprehensive integration; reduce cost; the protection environment; the base pit engineering safe mass guarantee system that economizes on resources.
In fact, supporting and protection structure can be regarded as by the two large divisions and form: the one, and retaining wall, the 2nd, support.The two independence or be used in combination and just formed various support systems.Retaining wall comprises the support of steel wood, sheet pile supporting, castinplace pile, deep-mixed pile and diaphragm wall.Support comprises shores and draws anchor; Draw anchor to divide single anchor, many anchors again.
Development along with the deep-foundation pit engineering technology, open caisson or caisson that cement mixing method, soil nailing wall, drilled pile hole digging pile, punching stake, tube-sinking cast-in-situ pile, precast reinforced concrete piles, diaphragm wall and SMW worker's method diaphragm wall and special structure are used are widely used, but still are the technology based on foundation ditch temporary lining generally.Point out as " China's deep-foundation pit engineering Recent Progress in recent years ": " though deep-foundation pit engineering belongs to temporary work; its technical complexity far is far more than nonvolatil foundation structure or superstructure; careless slightly; not only will jeopardize the safety of foundation ditch own; and can bring disaster to construction of structures, road and bridge and the various underground installation that closes on, bring about great losses.In addition, many technical datas when deep-foundation pit engineering design needs with excavation construction are foundation, tend in the excavation construction process to occur to be difficult to precognition in advance and handle afterwards, cause that the inside and outside soil deformation of supporting and protection structure internal force and displacement and foundation ditch takes place by all unexpected variations.Even also there is the cost height in the diaphragm wall in the fashionable world, will handles spoir and waste mud, cell wall caves in and all problems of seepage.
The summary of the invention the technical problem to be solved in the present invention be to provide a kind of simple in structure, make easily, the multifunctional precast arch piece of efficient rapid construction.The compound arch wall of the optimization that provides a kind of supporting to combine with agent structure is provided second technical problem that the present invention will solve.
It is as follows that the present invention solves the problems of the technologies described above the technical scheme of being taked: a kind of multifunctional precast arch piece, it is characterized in that it comprises the connection rib that arch bar and two ends are provided with, and arch bar and connection rib include cage of reinforcement and are coated on the concrete of cage of reinforcement periphery; Cage of reinforcement comprises several distribution bars affixed between two main muscle and the main muscle, the two ends of main muscle are provided with extends crotch connection rib concrete rear end face, that bend laterally, the centre is provided with extends the anchoring moving bar arch bar back, both sides extension to the left and right, and anchoring moving bar external part is provided with the folding hook to the centerline direction bending; Connection rib is provided with and is used for the interconnective connecting hole of adjacent arch sheet.
This multifunctional precast arch piece provided by the present invention is that construction work, underground construction, construction of tunnel are prefabricated, a new road has been walked out in batch production, standardization.
Multifunctional precast arch piece is used for the highrise building pattern foundation pit supporting structure, can realize the unification of outer wall of basement and supporting and protection structure simultaneously, replaces current advanced heaviness, the diaphragm wall of high price, solves stressed, waterproof, all problems of draining simultaneously.Remove to keep diaphragm wall low noise, low vibrations, rigidity is big, distortion is little, outside advantages such as surrounding enviroment influences is little, also having need not special-purpose machinery, construction is fast, low, the impervious ability of cost is strong, need not to adopt the outer rotary churning pile water stopping in hole, the anti-drainage measure of buttress and inwall can solve anti-drainage problem economical and practically in the hole.
Multifunctional precast arch piece is used for retaining wall: can save the lot of materials resource, and the reduction of erection time, and have reliable workmanship and durability.
Multifunctional precast arch piece is used for the earthing exterior wall and the earthing top board of backer or hillside earth: remove and to have solved retaining wall and exterior wall unites two into one, saved outside one body of wall, also saved the soil, because one to three exterior wall closely contacts with massif, utilize stratum characteristic cool in summer and warm in winter, saved the energy.
Handle spoir and waste mud, exist cell wall to cave in and all problems of seepage at diaphragm wall cost height, needs, it is a kind of under low consumption high-performance prerequisite that second technical problem that the present invention will solve is to provide, realize safety, high-quality, fast, protection environment purpose, have the optimization composite prefabricated arch wall that the supporting and protection structure of every function of diaphragm wall combines with agent structure; This optimization composite prefabricated arch wall has solved the pattern foundation pit supporting structure problem automatically when not digging the underground agent structure of foundation ditch adverse construction method.
The present invention solves the technical scheme that second technical problem take: the optimization composite prefabricated arch wall that a kind of supporting and protection structure combines with agent structure, it is characterized in that: this optimization composite prefabricated arch wall comprises prefabricated arch wall and cast-in-place waterproof concrete wall, the mutual fissure of displacement of construction joint of the construction joint of prefabricated arch wall and cast-in-place waterproof concrete wall; Cast-in-place waterproof concrete wall is located between the prefabricated arch wall outside and the clay model; Prefabricated arch wall is mutually permanently connected by polylith precast arch piece upper and lower, left and right and constitutes; Sleeper master muscle is arranged vertically the crotch place of two adjacent in the horizontal direction precast arch pieces from bottom to top, each floor of below ground, respectively encircle the crotch cross fixation of adjacent two precast arch pieces of lamella in sleeper master muscle, the connecting hole of adjacent two precast arch pieces is installed connecting bolt, with adjacent two precast arch pieces fixedly connected or/and in encircleing lacing wire near several piece precast arch piece drawknot is fixed together; Layer of concrete between the connection rib of precast arch piece, sleeper master muscle and the clay model constitutes sleeper.
Further, strengthening lacing wire, difference to be encircleed the anchoring moving bar of adjacent two precast arch pieces of lamella fixedly connected, constitutes the rhombus steel mesh reinforcement.
Optimization composite prefabricated arch wall provided by the invention is different from by increasing the self-support supporting scheme of supporting member; Also be different from the scheme that the diaphragm wall by thick and heavy costliness combines with the agent structure part; More be different from and combine needs the contrary of extra-fill of backbreaking with the agent structure exterior wall and make the prefabricated arch wall scheme, but do not increasing substantially under the prerequisite of agent structure workload, adopt agent structure and the comprehensive scheme that combines of optimization composite prefabricated arch wall.
The 3rd technical problem that the present invention will solve is to provide a kind of basement of optimizing composite prefabricated arch wall as external wall that utilizes, and comprises exterior wall, basement column/stand column pile, horizontal shore, linking beam/collar tie beam/lintel, floor, basis and bottom basement bottom board; It is characterized in that: it also comprises the anti-arch board that is positioned at below the bottom basement bottom board; Exterior wall is the optimization composite prefabricated arch wall that prefabricated arch wall and cast-in-place waterproof concrete wall constitute; This floor is optimized above the composite prefabricated arch wall fixedly linking beam/collar tie beam/lintel, and linking beam/collar tie beam/lintel is embedded with tapping pipe, and the basis is to be positioned at the strip foundation of optimizing the composite prefabricated arch wall bottom, and strip foundation is provided with the sluicing groove; Dock with anti-arch board on the basis, and the concave surface of anti-arch board constitutes drainage channel between the two towards the bottom basement bottom board, and drainage channel is communicated with collecting-tank.
Optimizing composite prefabricated arch wall combines with the underground agent structure of highrise building, can easily solve supporting carrying, construction safety, prevent all problems of displacement, and, save the pattern foundation pit supporting structure fund at double, having tangible low consumption is that resource consumption is few, energy consumption is low, time loss is few, capital consumption is low; High-performance is stressed high-performance, use multi-functional advantage.Optimizing composite prefabricated arch wall not only as retaining soil, waterproof enclosure wall, also is basement load-bearing exterior wall.Its wall thickness need not increase thickness and just can solve pattern foundation pit supporting structure, retaining soil, waterproof, antiseepage, protection against the tide, ventilation, heat insulation all problems, and have functions such as noise reduction, light trough, decoration by underground agent structure load-bearing exterior wall control.
Optimize composite prefabricated arch wall and be used for the shallow foundation hole, can the directly positive practice construct; Deep foundation ditch should be pressed reverse construction, and its construction process divides two kinds of first post method and rear pillar methods:
Elder generation's post method is applicable to broken ground, and construction process is at first construction works stand column pile and column, as the vertical support system of underground structure.Cut the earth again to the basement roof lower edge, build basement first floor beam and slab structure with clay model, as the underground structure horizontal support elements.Then, wall displacement outside B1, excavation highly equals the small-sized tunnel of floor height, width<3m, and optimizes composite prefabricated arch wall with digging with building B1.After exterior wall is finished, can cut out this layer surplus earth, and the beam slab of construction B1 structure, simultaneously, connect high ground floor pillar and wallboard, construction ground floor structure; Continue it, use same quadrat method, construct underground two layers exterior wall, the earthwork and beam slab and F2/B2 structure are finished until underground bottom exterior wall, and are built base plate and finish until engineering.Shortcoming be lack small-sized, flexibly, digging machine efficiently, the shoveling progress is slowed down, but has saved the construction of continuous concrete wall time.
The rear pillar method is applicable to firm hard formation, and construction process is at first to cut the earth to the basement roof lower edge, builds basement first floor beam and slab structure with clay model, as the underground structure horizontal support elements.Then, in B1 exterior wall and post net position, one side or two sides excavation highly equal the small-sized tunnel of floor height, width<3m, and with digging with building B1 optimization composite prefabricated arch wall and column, but exterior wall and a column of the post net spacing of at every turn only constructing, and adjust superstructure bearing safety degree, and finish the assembly unit cast of optimizing composite prefabricated arch wall and the upright work of frame of steel column or steel pipe column as early as possible in the bottom cut-out.After exterior wall and column are finished, can cut out this layer surplus earth, and the beam slab of construction B1 structure, make post, wall, beam, hardening is combined into integral body.Continue it, use same quadrat method, construct underground two layers exterior wall, column, the earthwork and beam slab are finished until underground bottom exterior wall and column, and build arch raft foundation base plate after intensity reaches designing requirement, carry out the superstructure construction again.Shortcoming is that construction speed is slow slightly, but reduction effect is more remarkable.
Optimization composite prefabricated arch wall of the present invention is a supporting and protection structure and the innovation of the comprehensive technical scheme that combines of agent structure, being different from the prior art feature is to adopt novel optimization composite prefabricated arch wall to replace diaphragm wall, with the small-sized cavern construction under the protection of deep big foundation pit construction becoming top board, the outer wall of basement construction is become the job practices of constructing less than the small-sized cavern abutment wall of floor height, it is not digging foundation ditch, is not doing special pattern foundation pit supporting structure member, in steady construction, easily solved influence in agent structure to the intensive building of periphery; Solved the construction safety problem; Be improve the quality, reduce cost, protect environment, new effective way economizes on resources
Optimization composite prefabricated arch wall of the present invention is in the underground agent structure of construction, automatically solve foundation ditch temporary lining problem, comprise problems such as enclosure wall, retaining soil, waterproof, antiseepage, anti-displacement, and do not need to spend fund, material, the energy and the time of special temporary lining additive decrementation.
Key of the present invention is the diaphragm wall that replaces the fashionable world with the optimization composite prefabricated arch wall of prefabricated and cast-in-place combination, adopt overall contrary the work, layering, method is just being made in segmentation, replace diaphragm wall with optimizing composite prefabricated arch wall, do not need pattern foundation pit supporting structure separately, when finishing underground main structure construction, the safe construction of settling a dispute by the parties concerned themselves, stable and the peripheral stable problem of foundation ditch, not only can have the retaining soil that diaphragm wall has, dash, impervious, the function of carrying, and has construction fast, stressed immediately, the degree of safety height, the resist displacement ability is strong, malformation is little, and surrounding enviroment are influenced advantages such as minimum.Simultaneously, optimize composite prefabricated arch wall and also possess heat insulation, moistureproof, waterproof, drain function, and can be used as the usefulness of light trough, ventilation, finishing.Optimizing composite prefabricated arch wall need not special equipment, is convenient to large-scale industrialization production, and construction can be saved a large amount of energy, material and construction fund, 1/5 to 1/10 of the suitable diaphragm wall of its cost fast.
The scope of application of the present invention is also wide more than diaphragm wall, except that whole being suitable for of five class base pit engineerings that diaphragm wall is suitable for; Both, also be applicable to the small size underground construction applicable to the large tracts of land underground construction; Both be applicable to big depth underground engineering, also be applicable to little depth underground engineering; Both be applicable to complex-shaped underground construction, also be applicable to the underground construction of simple shape.To the size of environmental requirement, working space, good adaptive capacity is arranged all.As the deep foundation of big depth underground engineering or highrise building, available tunneling reverse construction; The shallow foundation of little depth underground engineering or multistory building, the positive practice construction of available open cut.Also extend to the retaining wall engineering, facts have proved, optimize compound retaining wall force of gravity formula retaining wall attenuate 90%.
Its theory and practice of optimization composite prefabricated arch wall of the present invention is according to being:
1, optimize stressedly, give full play to concrete resistance to compression advantage, can the attenuate wall thickness more than 40%;
Optimize and work by the multispan double-arch structure immediately after composite prefabricated arch wall is installed, the horizontal earth pressure that can will act in foundation ditch is converted into arch ring axle power, this arch ring axle power makes the arch cross section be in the small eccentric pressure state, avoid the arch ring cross section be subjected to curved pull open bad, because concrete crushing strength is higher approximately 10 times than tensile strength, each cross section pressurized has been given full play to concrete resistance to compression advantage.Therefore, under same safety factor, the design thickness that is subjected to the kinking structure than diaphragm wall, steel wood knee wall, sheet pile support wall, perfusion piling wall, deep-mixed pile wall isoline is attenuate significantly.As diaphragm wall thickness be 60~100cm, optimize composite prefabricated arch wall as long as 35~45cm, and, save a large amount of reinforcing bars; Optimize composite prefabricated arch wall and finish and is connected with last lower ring beam or adopts reinforcement to encircle sheet, more help optimizing stressed then by barrel shell work.
2, reduce span of arch degree, displacement is further reduced;
Under the same thickness situation, reduce span and equal to increase rigidity; Optimizing composite prefabricated arch wall is that prefabricated arch wall and the cast-in-place waterproof concrete wall that the arch sheet of 1m is built constitutes by span, than the contrary little manyfold of span of making prefabricated arch wall, cement mixing pile prefabricated arch wall, castinplace pile prefabricated arch wall of the steel concrete of building by foundation ditch span or post net span, the corresponding increase of its rigidity, displacement further reduces.
3, adopt the smooth arch of little ratio of rise to span of optimizing arch convergence district;
Can not only adapt to the variation that load distributes, stress performance is best generally, and axle power is big, and is eccentric little, helps lateral earth pressure is pulled open the bad compression damage that changes into to structure curved, improve greatly supporting capacity.The arch springing horizontal thrust makes sleeper or structural upright be in triaxial stress state, improves the anti-bending strength of post.When the arch springing horizontal thrust acts on sleeper or structural upright, left and right sides thrust is cancelled out each other, sleeper or structural upright are under the situation that horizontal thrust is pushed and vertical load pushes and are bent, and the component that points to the generation moment of flexure of basement inside reduces with the horizontal thrust increase, helps whole opposing displacement.
4, deepening big foundation pit construction is top board protection shallow little constructing tunnel down, the assurance construction safety;
For the difficulty of construction that deep big foundation pit increases, available overall contrary the work, layering, segmentation are just being constructed as method and are being solved.The foundation pit side-wall area of so each exposure is very little, highly is no more than floor height, and length is no more than a post net length, and safety will greatly improve.
5, utilize the certainly steady time of precast arch piece and country rock, land movement around preventing;
Country rock or pit earthwork all have certain for the steady time after excavating, and increase gradually even press also.Because of precast arch piece has reached design strength, utilize optimization composite prefabricated arch wall that precast arch piece makes up as body of wall internal mold, the soil body as external mold, can finish installation in quick before country rock is pressed, general about two hours, can be stressed immediately after installation and the pouring cast-in-situ concrete, even the cast-in-situ concrete ot-yet-hardened can not bear any horizontal force, only depend on the thick optimization precast arch piece of 6cm just can bear the lateral pressure of 400KPa.In addition, finished stratum displacement work with the optimization composite prefabricated arch wall at the utmost point in short time, this on foundation pit walls horizontal support, that be no more than floor height, that exposed area is very little is arranged, fully can be littler than the displacement of standard control, make the safety problem of neighboring buildings, road, pipe network more guaranteed.
6, the four sides supporting construction that existing cantilevered space enclosing structure is become after three surface bearing structures of work progress or construction are finished has improved stress performance, has reduced the buried depth of space enclosing structure;
There is the single stake of the cantilevered space enclosing structure insertion depth should not be less than 1 times of cutting depth; Cantilevered arcuate peripheral protection structure insertion depth can be littler.The present invention builds by the agent structure requirement, does not need to increase insertion depth.
7, adopt arch formula raft foundation to solve the protuberance problem, replace complicated anti-grand structural system or thick and heavy negative;
Dongfanghong underground commercial center, Lanzhou is positioned at high water level area, center, Lanzhou, the long 200m of foundation ditch, wide 100m, the maximum buried depth 10.2m of engineering, there is 7.2m to be embedded in the water, on the design basis of the original abutment wall bar base of agent structure, independent foundation under column, adopts to add contact beam and arch formula raft foundation, in antiarch, add gravel french drain counterweight, successfully solved protuberance and anti-floating problem.Formally came into operation intact so far normal business from 1996.
8, adopt cast-in-place waterproof concrete and optimize the arch sheet fissure of displacement, eliminate the construction straight joint, forbid that reinforcing bar penetrates, measures such as space draining that mud jacking leak stopping, part are provided with expansion sealing rod and arch sheet inboard, satisfactorily resolved the anti-drainage problem of Underwater Engineering;
9, the cast-in-place waterproof concrete layer that is provided with of the outside, be convenient to vertical layered closely knit making firm by ramming, do not exist bottom land layer sediment to influence the problem of bearing capacity, and utilize native external mold that cast-in-place waterproof concrete is closely contacted with the peripheral soil body, utilize country rock frictional force and cohesion, improve shock resistance and exterior wall bearing capacity.
10, utilize to optimize the space that composite prefabricated arch wall is saved, can solve problems such as draining, damp proof insulation, heat insulation, ventilation, light trough and decoration support,
Below, will obscure easily in existing three big advanced technologies of the present invention and the present invention and be compared:
The first, make prefabricated arch wall relatively with contrary
2007 registration geotechnical engineering teachers training schools already take an examination and review study course, the 4th edition introduction: " the contrary prefabricated arch wall structure of doing is arc-planes such as excavation of foundation pit is circular, ellipse; and make reinforced concrete prefabricated arch wall along the foundation pit side-wall layering is contrary; utilize the effect of arch will be converted into tangential force in the prefabricated arch wall perpendicular to the soil pressure of body of wall, to make full use of the compressive strength of walls concrete.Can adopt closed or non-closed prefabricated arch wall according to geological conditions, foundation ditch flat shape and foundation ditch periphery site condition etc. in the design.Because body of wall internal force is mainly compressive stress, given full play to the high characteristic of concrete compressive strength, so thickness of wall body can be thinner, just may satisfy intensity and stable requirement without anchor pole or interior support under a lot of situations.Though, even arch ring need adopt methods such as cement mixing method or chemical grouting to form water-stop curtain sometimes.But its cost still is lower than general piling wall supporting and protection structure about 50%.This structure generally adopts the cast-in-situ steel reinforced concrete prefabricated arch wall structure of layer and section construction.The prefabricated arch wall cross section is preferably zigzag, and the upper and lower end of buttress adds girt strip usually.When excavation slope ground is narrower, can add girt strip but should thicken buttress.The contrary prefabricated arch wall horizontal direction construction section length of doing should not surpass 12m, and weak soil layer or layer of sand section length should not surpass 8m.The vertical direction layer height should not surpass 2.5m.Prefabricated arch wall structural concrete strength grade should not be lower than C25, the upper track prefabricated arch wall closes up and concrete strength reach design strength 70% after, just can descend the construction of road prefabricated arch wall.”
Optimization composite prefabricated arch wall of the present invention also is to be connected and fixed the composite structure that the prefabricated arch wall that constituted and cast-in-situ concrete combine by precast arch piece, is with the contrary difference of making prefabricated arch wall:
1, the contrary prefabricated arch wall structure of doing is with the supporting and protection structure of the on-the-spot placing of steel bar concrete, still needs to build in addition the agent structure outer wall of basement;
The present invention is the composite structure of precast arch piece and the on-the-spot placing of concrete, does not need to build in addition the agent structure outer wall of basement, and itself has the double action of space enclosing structure and outer wall of basement.
2, the contrary arch ring rise f>0.12L that makes the prefabricated arch wall structure, L is the foundation ditch length of side; Therefore, occupied ground is bigger, only be suitable for foundation ditch periphery place allow barricade in level to the arch camber part or be suitable for the foundation ditch of circular arc;
The length L of arch ring rise f<0.12L of the present invention, precast arch piece is unified to be 1m, and by optimizing the design of convergence district, can adapt to loads change, not be subjected to the restriction of the foundation ditch length of side and foundation ditch shape, can press the shape and size construction of main building basement or underground construction design fully.
3, be no fixed section retaining structure against making the prefabricated arch wall support system, can produce integral slipping and bottom heave;
The present invention optimizes composite prefabricated arch wall and utilizes the agent structure beam slab as horizontal support, utilizes the agent structure column as vertical support, utilizes supporting arch raft foundation base plate as anti-grand structure, can not produce integral slipping and bottom heave.
4, the contrary prefabricated arch wall structure of doing itself can not be used as the waterproof system, and when underground water, the methods such as cement mixing method or chemical grouting of using form water-stop curtain.
The present invention has complete waterproof, antiseepage, drainage system, needs except that indivedual a large amount of water burst holes generally need not build water-stop curtain the method water blockoff such as chemical grouting.
5, be zigzag against doing the prefabricated arch wall cross section, its vertical spacing should not be greater than 2.5m, when dark and supporting height one zigzag prefabricated arch wall is not enough when foundation ditch, can form by several prefabricated arch wall is superimposed, along the indentation of prefabricated arch wall height several girt strip or thickening buttress are set, this just need take the place beyond the large amount of building; After engineering is finished, excavate the place that the takies backfill of taking a lot of work again more.
It is I word cross section that the present invention optimizes composite prefabricated arch wall, is located at the outer wall displacement of underground agent structure, does not take building place in addition.Both few earth excavation also need not backfill after engineering is finished.Its vertical degree of depth open cut can reach 10m when just doing, and floor height is no more than 10m can both meet the demands in that tunneling is contrary when doing.
6, against being applicable to non-weak soil, phreatic low place as prefabricated arch wall, cutting depth generally should not surpass 12m.
The scope of application of the present invention is wider, and the geology that can make diaphragm wall can both adapt to, and the under ground portion total depth is satisfying under the prerequisite of bearing capacity of foundation soil, and is unrestricted substantially.
7, lower against making prefabricated arch wall pattern foundation pit supporting structure cost, only is 30%~60% of slope protection pile cost generally, remarkable in economical benefits; Cost of the present invention is lower, except that the necessary spending of underground agent structure, does not increase the expense of temporary support structures substantially.
The second, compare with self-support supporting construction
Self-support supporting construction is thought: pattern foundation pit supporting structure soil pressure load does not rely on supporting forces such as the drag, anchor-hold of geotechnical engineering, and relies on structure self-supporting power independently to bear.And be divided into multi-arch type and shore two kinds of self-support supporting construction and circular ring type straight wall self-support supporting constructions.Be with difference of the present invention:
1, the self-support supporting construction patent of invention is described: pattern foundation pit supporting structure relies on structure self-supporting power independently to bear.In fact the structure of its indication is except that comprising existing agent structure, also comprise a series of structures that newly add, as except that existing frame back support, increasing the measure that belongs to working measure shores, comprise detachable tool shore with base plate under plate under shore, it is that the tool steel structure is shored that instrument is shored, and will remove after the construction; Shore under the plate be base plate next time property steel concrete shore.
And the present invention only utilizes the support of existing frame back, need not to increase to the measure that construction is provided with and shores.
2, the anti-grand structural system of self-support supporting construction is divided single anti-grand structure and comprehensive anti-grand structure two big classes.Single anti-grand structure comprises that the anti-grand structure of supporting, straight wall resist three kinds on grand structure, the anti-grand structure of counterweight.Counterweight resists grand structure to be divided into the anti-grand structure of building counterweight again and soil body counterweight resists two kinds on grand structure.The anti-grand structure of soil body counterweight capacitance divider again resists grand structure and slip casting to resist two kinds on grand structure.Comprehensive anti-grand structure is made up of 3 kinds or 2 kinds of single anti-grand structures ... in fact, anti-grand structure can be considered the virtual base plate that has equal anti-grand ability with the structure base plate, and virtual base plate is laid in before soil excavation and is difficult to construction below the structure base plate.
The present invention need not complicated anti-grand structure, relies on quick, section construction arch formula raft foundation, just can resist the foundation pit deformation protuberance.
3, the space enclosing structure of self-support supporting construction is a beam and slab structure, is made of soldier pile and arch bar.Be divided into supporting beam plated construction and composite beam plated construction; The supporting beam plated construction is only made supporting usefulness, belongs to working measure, and after the engineering construction, supporting and protection structure is ineffective; The composite beam plated construction is composited by the supporting arch bar of bearing soil pressure and formal building cast-in-situ reinforced concrete structure arch bar, does not in fact save.
The optimization composite prefabricated arch wall that the present invention uses is born space enclosing structure and external wall dual role, and, have the member combination by self and main body underground structure, need not to increase soldier pile and just can finish pattern foundation pit supporting structure work voluntarily.
4, the circular ring type straight wall self-support supporting construction of self-support supporting construction is a reinforced concrete structure, divides diaphragm wall annulus straight wall, hole digging pile annulus straight wall, agitation pile annulus straight wall.
Optimization composite prefabricated arch wall of the present invention not only can conveniently be combined into the annulus straight wall, the straight wall of one-tenth arbitrary shape also capable of being combined, and also construction is fast, and can be stressed immediately behind the precast arch piece installation in position concrete perfusion.As being used for temporary shaft, available 37 lime earth substitutes concrete, after engineering is finished, optimizes the arch sheet and can reclaim.
In a word, self-support supporting construction is independently to bear soil pressure with structure self-supporting power, but these structures not all are that underground agent structure is necessary also, but the extra structure that increases; The present invention relies on existing agent structure and essential optimization composite prefabricated arch wall in conjunction with replacing supporting and protection structure fully, can save pattern foundation pit supporting structure great amount of investment and time, can solve the pattern foundation pit supporting structure problem simultaneously again.
The 3rd, compare with supporting and protection structure and the comprehensive combination technology of agent structure
The method that deep foundation pit supporting structure combines with agent structure partly is used for agent structure with temporary lining, has realized the unification of two walls, and engineering is significantly saved.Three kinds of combining with agent structure of deep foundation pit supporting structure are dissimilar:
1, the interim fender body of periphery substitutes the system that supports in conjunction with hole inner beam plate body system, except that needs construction water-stop curtain, the temporary linings such as (with reinforced concrete bored pile, SMW worker's method and boring interlock stake) of interim fender body, also need a small amount of shaped steel to support temporarily, and the outer wall of basement of building separately, fender body takes up space still bigger, be unfavorable for that the land for building utilizes, the earthwork of digging also needs backfill more.
2, peripheral diaphragm wall " unification of two walls " is in conjunction with interim support system in the hole, and with diaphragm wall double as outer wall of basement, the workload of having saved conventional outer wall of basement has reduced fender body and taken up space, and has reduced soil excavation and backfill.But underground each layer needs all to be provided with that steel concrete supports or steel supports as interim horizontal support, and underground each layer all needs interim column is set, treat that agent structure is finished and can be stressed after, could remove.
3, the comprehensive coupling system of supporting and protection structure and agent structure, space enclosing structure adopts the diaphragm wall of " unification of two walls ", the horizontal beam plate body system of underground structure substitutes horizontal support, the column of structure and stand column pile are used reverse construction as vertical support system, owing to cancelled interim support, need not to consider interim support replacement, than the obvious progress of said system, but diaphragm wall cost height, construction quality instability need the special-purpose machinery construction.In four kinds of combinations of diaphragm wall and outer wall of basement " unification of two walls ", wherein separate wall, overlap wall, these three kinds of modes of composite prefabricated arch wall still need establish the agent structure exterior wall in addition, even the combination of single wall, for solving diaphragm wall antiseep problem, still need be at underground continuous wall groove width of cloth parting place arranged outside high-pressure rotary jet grouting pile, the inboard is provided with structural stud and inwall, forms the damp proof insulation space, and ponding is caused sump discharge by curb, vertical tube.Therefore, do not obtain the effect of real " unification of two walls ", expend still bigger.
The outstanding effect of optimizing composite prefabricated arch wall is as follows:
1, optimizes composite prefabricated arch wall and save the pattern foundation pit supporting structure wall one, enlarged usable floor area.Thinner thickness of the present invention is about diaphragm wall 1/2~1/3.Inside has hollowed out area savings concrete has increased free space.In the individual layer floor height 4m, square dark beam need not be set generally, only need in the junction of two adjacent arch sheets 3 of vertical reinforcements to be set, connect with last lower ring beam, it is very remarkable to save steel.
2, build the every heavy 50kg of precast arch piece that optimizes composite prefabricated arch wall, be convenient to Fast Installation, behind the placing of concrete, can be stressed immediately.Precast arch piece is even the pumping of concrete ot-yet-hardened of prefabricated arch wall back also can bear the pressure of 400KPa immediately.And along with pumping of concrete is increased by densification and intensity, supporting capacity can further improve.Optimize composite prefabricated arch wall from the installation of cutting the earth, only need several hrs just force-applied, both reduced soil body open-assembly time, increase with soil pressure again and adapt, effectively reduced soil deformation and, be applicable to the building dense area the periphery influence.
3, optimize composite prefabricated arch wall without template, internal mold is the thick optimization arch sheet of 6cm, and external mold is a clay model.Concrete closely contacts with the soil body, helps increasing cohesion and frictional force, improves carrying and shock resistance.
4, optimize composite prefabricated arch wall produces perpendicular direction under the lateral earth pressure effect horizontal thrust, sleeper is under the clamping of precast arch piece horizontal thrust, improved the bending resistance of sleeper.
5, substituting horizontal inner supporting body with beam and slab structure is, adds and utilizes clay model, saves template, supports about 80% than the foundation ditch method.
6, body of wall need not to put the slope, has reduced and has backbreak and the backfilling working amount.
7, after the underground space forms, can make full use of, solve the narrow difficult problem in construction plant.
8, construction under top board protection, favourable safety, favourable minimizing environmental noise and airborne dust, favourable winter, rainy season normal construction.
9, optimize composite prefabricated arch wall except that having reasonable stressed function, anti-drain function, stress adjustment function, anti-drain function is played in the inner space that utilizes pre-arch sheet to save; Light trough, decoration functions; Effects such as functions such as heat insulation, ventilation, antiseepage, protection against the tide and noise reduction.
10, ground is just done, and the ground subinverse is done, construction simultaneously, and the duration shifts to an earlier date, for vertical built by separate periods creates conditions.
Optimization composite prefabricated arch wall of the present invention can not excavate foundation ditch, without diaphragm wall, the method for support specially, retaining wall or rock-reinforcing is optimized composite prefabricated arch wall and the comprehensive combination of agent structure but rely on, bracing of foundation pit wall and structure outer unite two into one, and do not establish interim enclosure wall in addition.Basement beam slab stanchion need not to increase interim support system as support system.By scientific and reasonable construction; quickly and reliably replace the method for the underground space; automatically realize that pattern foundation pit supporting structure, structure are steady certainly, reduce and prevent that surrounding soil is out of shape and displacement; reach safe mass, reduction cost, the reduction of erection time of the under ground portion that guarantees underground construction or highrise building, protection environment, aim of saving.Therefore, applicable to basement in high rise building, large-scale underground store and underground parking, subway station and underground transportation junction, underground substation etc.
The multi-functional earthing local-style dwelling houses in five Li Pu hillside, the underground auditorium of Lanzhou garrison command, mountain, Gansu Province Department of Construction Gaolan earthing solar energy housing are built in the Lanzhou, Lanzhou capital construction commission White Pagoda Hill Park earthing solar energy housing is built, implement successfully Dongfanghong underground commercial center, Lanzhou to optimize composite prefabricated arch wall; The underground auditorium of Lanzhou garrison command building area 2183m2 wherein, span 20.26m; Be local 2 layers of ground, underground 1 layer is that the master is the long span building of assisting for underground local 2 layers, with the construction of contrary sequence method clay model, need not support built, more similar engineering economy concrete 65.5%.Utilize the cut-out of optimizing composite prefabricated arch wall as between washroom, makeup, enlarged usable floor area, utilization rate reaches 86%.
Description of drawings Fig. 1 is the structural representation of precast arch piece,
Fig. 2 is the structural representation of second kind of precast arch piece,
Fig. 3 is the structural representation of the third precast arch piece,
Fig. 4 is the improvement structural representation of Fig. 1,
Fig. 5 is the improvement structural representation of Fig. 2,
Fig. 6 is the improvement structural representation of Fig. 3,
Fig. 7 is the structural representation of arch sheet cage of reinforcement,
Fig. 8 is the schematic diagram of the bar construction of thin floor among Fig. 2,
Fig. 9 is a structural representation of optimizing the composite prefabricated arch wall section,
Figure 10 is the outside elevational schematic view that connects of prefabricated arch wall,
Figure 11 is with the sheet that the binds schematic diagram that binds,
Figure 12 is with the reinforced sheet schematic diagram that binds,
Figure 13 utilizes to optimize the total structure figure that composite prefabricated arch wall is built basement,
Figure 14 is the enlarged drawing of A portion among Figure 13.
Among the figure: 1-arch bar, 101-connection rib, 102-lacing wire groove, 2-connecting hole, the 3-cage of reinforcement, 4-approaches floor, the 5-spilled water hole, the 6-concrete, 7-grout hole, 8-master's muscle, the 801-crotch, 9-anchoring moving bar, 901-rolls over hook, the 10-distribution bar, 11-approaches the floor reinforcing bar, and 1101-encloses muscle, 1102-approaches the floor distribution bar, 12-sleeper master muscle, the cast-in-place waterproof concrete wall of 13-, 14-reserves and takes on layer of sand, 15-country rock clay model, 16-linking beam extremely, collar tie beam or lintel, 17-column or stand column pile, 18-floor, 19-horizontal shore, the 20-water-proof decoration plate, 21-bottom basement bottom board, 22-basis sluicing groove, the 23-basis, 24-anti-arch board, 25-expansion sealing rod, the 26-tapping pipe, the stress at place, 27-crack is adjusted lacing wire, and 28-sleeper: 29-strengthens lacing wire, the 30-prefabricated arch wall, the 31-connecting bolt
Specific embodiment embodiment 1 is as shown in Figure 1: a kind of multifunctional precast arch piece that present embodiment provided, it is ordinary tablet of the present invention, it comprises the connection rib 101 that arch bar 1 and two ends are provided with, referring to Fig. 7, arch bar 1 and connection rib 101 include cage of reinforcement 3 and are coated on the concrete 6 of cage of reinforcement 3 peripheries, referring to Fig. 9; Cage of reinforcement 3 comprises seven affixed distribution bars 10 between two main muscle 8 and the two main muscle 8, the two ends of main muscle 8 are provided with extends crotch 801 connection rib concrete rear end face, that bend laterally, intermediate distribution muscle 10 is provided with and extends anchoring moving bar 9 arch bar 1 back, both sides extension to the left and right, and anchoring moving bar 9 external parts are provided with the folding hook 901 to the centerline direction bending; Connection rib 101 is provided with connecting hole 2.Anchoring moving bar 9 is for carrying lifting and anchoring.During installation, connecting bolt passes the connecting hole 2 of adjacent arch sheet, and adjacent arch sheet is connected as one, and the fixture when connecting bolt also can be used as finishing uses.Ratio of rise to span of the present invention is preferably less than 1/8 smooth arch, belongs to the arch in the arch convergence district.Like this, not only the load changes in distribution is had bigger adaptive capacity, and axle power is big, eccentric little, help curved the pulling open badly of structure being changed lateral earth pressure into compression damage, improve supporting capacity greatly.
Embodiment 2 is as shown in Figure 2: in order to improve the integral rigidity of arch sheet, this multifunctional precast arch piece that present embodiment provided has thin floor 4 in a side increase of arch bar 1, to improve the integral rigidity of arch sheet; Referring to Fig. 8, thin floor 4 comprises the thin floor concrete that approaches floor reinforcing bar 11 and be coated on thin floor reinforcing bar 11, and thin floor reinforcing bar 11 is made up of circle muscle 1101 and the thin floor distribution bars 1102 that are fixedly arranged in the circle muscle 1101.
Thin floor 4 also can be located at the both sides of arch bar 1.The thickness of thin floor 4 is 25mm.
This arch sheet that is provided with thin floor 4 is referred to as reinforced sheet, and it is used for stressed bigger position, change greatly as geological conditions extreme difference, pressure from surrounding rock, and unpredicted location.When floor height surpasses 4m, also can set up one to several layers reinforced sheet at the body of wall middle part.
Perfect as present embodiment, the middle part of thin floor 4 is provided with spilled water hole 5, just in case underground certain layer has a small amount of infiltration, can infiltration be discharged to the bottom drainage channel by spilled water hole 5 and flow to the collecting-tank eliminating.
This multifunctional precast arch piece that embodiment 3 present embodiments are provided, be called the sheet that binds, its structure is as shown in Figure 3: a side at arch bar 1 middle part is provided with grout hole 7, bind sheet in order to build to build the last layer of under various places floor exterior wall, after the installation of lastblock arch sheet, to grout hole 7 grouting, that the concrete spouting that kills the shoulder position is closely knit.
The optimum specifications of the multifunctional precast arch piece that each embodiment provided is: long 1m, wide 30cm, thick 6cm, rise 10cm.
Perfect as precast arch piece, referring to Fig. 4 to Fig. 6: connection rib 101 outsides are provided with lacing wire groove 102.This structure is used for the geological conditions extreme difference, country rock changes greatly, and unpredicted place, as adjusting vertical stress, preventing stressed irregular usefulness.
Embodiment 4 as Fig. 9 with shown in Figure 10: the optimization composite prefabricated arch wall that a kind of supporting and protection structure combines with agent structure, it is characterized in that: this optimization composite prefabricated arch wall comprises prefabricated arch wall 30 and cast-in-place waterproof concrete wall 13, the mutual fissure of displacement of construction joint of the construction joint of prefabricated arch wall 30 and cast-in-place waterproof concrete wall; Cast-in-place waterproof concrete wall 13 is located between prefabricated arch wall 30 outsides and the country rock clay model 15; Prefabricated arch wall 30 is mutually permanently connected by polylith precast arch piece upper and lower, left and right and constitutes; Sleeper master muscle 12 is arranged vertically crotch 801 places of two adjacent in the horizontal direction precast arch pieces from bottom to top, each floor of below ground, respectively encircle crotch 801 cross fixation of adjacent two precast arch pieces of lamella in sleeper master muscle 12, the connecting hole 2 of adjacent two precast arch pieces is installed connecting bolt 31, and adjacent two precast arch pieces are fixedly connected; When deforming sign, also can pass through connecting hole 2, near several piece precast arch piece drawknot is fixed together with lacing wire 27 in the long arch; To bring into play the common stressed effect of each sheet, to prevent the generation in crack; Layer of concrete between the connection rib 101 of precast arch piece, sleeper master muscle 12 and the country rock clay model 15 constitutes sleeper 28.
Utilize the crotch 801 of arch sheet master muscle 8 to intersect, play the effect of stirrup by sleeper master muscle 12.Sleeper master muscle 12 extend in upper and lower end collar tie beam or the lintel.The sleeper 28 that is made of the layer of concrete between connection rib 101, sleeper master muscle 12 and the country rock clay model 15 of precast arch piece is to improve to optimize the stressed ingredient of composite prefabricated arch wall.After arch sheet installation, utilize that the arch sheet is made internal mold, the stratum is that clay model is made external mold, pour into a mould cast-in-place waterproof concrete after, sleeper forms automatically, it is one of main member that bears lateral pressure and vertical load.
Very big for lateral pressure, and indivedual positions in the distributed pole inequality, as optimizing the perfect of composite prefabricated arch wall, referring to Fig. 9 and Figure 10: strengthen folding hook 901 places that anchoring moving bars 9 that lacing wire 29 is fixedly connected on adjacent two precast arch pieces of different arch lamellas expose, formation rhombus steel mesh reinforcement.To strengthen the mass action of optimizing composite prefabricated arch wall, solve stressed irregular problem.
Referring to Figure 13:, optimize composite prefabricated arch wall vertical abutment joint place expansion sealing rod 25 is set as optimizing the further perfect of composite prefabricated arch wall.
Shown in Figure 11 is to optimize composite prefabricated arch wall to take on processing mode extremely with the sheet that binds: when optimizing composite prefabricated arch wall and be filled into last layer, except that the main muscle welding of guaranteeing sleeper or overlap joint quality, can pour into dry pea gravel concreten or the expansive concrete that is higher than member label one-level by sheet grout hole 7 pressure that bind, the concrete that 14 places are takeed in certain assurance extremely is full closely knit.
Shown in Figure 12 is to optimize composite prefabricated arch wall to take on processing mode extremely with reinforced sheet: at the superiors' mounting arch sheet not, and adopt inversion to strengthen the arch sheet at following one deck, directly fill up tamping with artificial with the dry microlith waterproof concrete or the expansion waterproof concrete that are higher than member label one-level, concrete is filled out on the limit, pound with hammer on the limit, and the concrete of guaranteeing to take on extremely 14 places is full closely knit.Arrive the upright again part plan template in edge within the walls, to increase top waterproof thickness.
Embodiment 5 is as Figure 13 and shown in Figure 14: a kind of basement of optimizing composite prefabricated arch wall as external wall that utilizes comprises exterior wall, basement column 17, horizontal shore 19, linking beam, collar tie beam or lintel 16, floor 18, basis 23 and bottom basement bottom board 21; It is characterized in that: it also comprises the anti-arch board 24 that is positioned at below the bottom basement bottom board 21; Exterior wall is the optimization composite prefabricated arch wall that prefabricated arch wall 30 and cast-in-place waterproof concrete wall 13 constitute; This floor is optimized above the composite prefabricated arch wall fixedly linking beam, collar tie beam or lintel, linking beam, collar tie beam or lintel are embedded with tapping pipe 26, basis 23 is to be positioned at the strip foundation 23 of optimizing the composite prefabricated arch wall bottom, strip foundation 23 is provided with to the inclined-plane of indoor direction inclination, and the inclined-plane is provided with sluicing groove 22; Strip foundation 23 is docked with anti-arch board 24, and the concave surface of anti-arch board 24 constitutes drainage channel between the two towards bottom basement bottom board 21, and drainage channel is communicated with collecting-tank.
Perfect as this basement for indoor heat insulating, damp proof insulation and attractive, decorative effect, has water-proof decoration plate 20 in the installed inside of prefabricated arch wall 30.
Further perfect as this basement in order to increase the supporting capacity of bottom basement bottom board 21, is equipped with parapet, as the supporting wall of bottom basement bottom board 21 between bottom basement bottom board 21 and anti-arch board 24.
Further perfect as this basement avoids underground water to cause anti-arch board 24 to float for sending out, and is placed with gravel on anti-arch board 24, and the french drain between the gravel slit is as the gutter.
Further perfect again as this basement, 24 of adjacent anti-arch boards install expansion sealing rod 25 additional.
Optimize composite prefabricated arch wall not only small and exquisite, flexible, save, also need not special-purpose machinery and construction in advance, be utilize precast arch piece to make internal mold, the country rock clay model is made external mold, is building under the basement roof protection, construct by the layer and section tunneling and finish.When optimizing the composite prefabricated arch wall construction,, adhere to the principle of " operation is closelyed follow " with the method for building the minitunnel abutment wall, segmentation successively advances and finishes.Just doing the principle construction by overall contrary work, layering.

Claims (6)

1. one kind is utilized the basement of optimizing composite prefabricated arch wall as external wall, comprises exterior wall, basement column/stand column pile, horizontal shore, linking beam or collar tie beam or lintel, floor, basis and bottom basement bottom board; It is characterized in that: it also comprises the anti-arch board (24) that is positioned at below the bottom basement bottom board (21); Exterior wall is the optimization composite prefabricated arch wall that prefabricated arch wall (30) and cast-in-place waterproof concrete wall (13) constitute; This floor is optimized above the composite prefabricated arch wall fixedly linking beam, collar tie beam or lintel (16), linking beam, collar tie beam or lintel pre-(16) are embedded with tapping pipe (26), basis (23) is to be positioned at the strip foundation (23) of optimizing the composite prefabricated arch wall bottom, and strip foundation (23) is provided with sluicing groove (22); Strip foundation (23) is docked with anti-arch board (24), and the concave surface of anti-arch board (24) constitutes drainage channel between the two towards bottom basement bottom board (21), and drainage channel is communicated with collecting-tank.
2. a kind of basement of optimizing composite prefabricated arch wall as external wall that utilizes as claimed in claim 1, it is characterized in that: strip foundation (23) is provided with to the inclined-plane of indoor direction inclination, and the inclined-plane is provided with sluicing groove (22).
3. a kind of basement of optimizing composite prefabricated arch wall as external wall that utilizes as claimed in claim 1, it is characterized in that: the installed inside of prefabricated arch wall (30) has water-proof decoration plate (20).
4. a kind of basement of optimizing composite prefabricated arch wall as external wall that utilizes as claimed in claim 1 is characterized in that: be equipped with parapet between bottom basement bottom board (21) and the anti-arch board (24).
5. as any described a kind of basement of optimizing composite prefabricated arch wall as external wall that utilizes of claim 1 to 4, it is characterized in that: anti-arch board is placed with gravel above (24), and the french drain between the gravel slit is as the gutter.
6. a kind of basement of optimizing composite prefabricated arch wall as external wall that utilizes as claimed in claim 5 is characterized in that: install expansion sealing rod (25) between the adjacent anti-arch board (24) additional.
CN2010102523091A 2008-11-19 2008-11-19 Basement by using optimized composite prefabricated arch wall as external wall Expired - Fee Related CN101914925B (en)

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