CN104060629A - Covered top-down excavation subway station overlapped wall construction method and movable side wall formwork jumbo - Google Patents

Covered top-down excavation subway station overlapped wall construction method and movable side wall formwork jumbo Download PDF

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Publication number
CN104060629A
CN104060629A CN201410311428.8A CN201410311428A CN104060629A CN 104060629 A CN104060629 A CN 104060629A CN 201410311428 A CN201410311428 A CN 201410311428A CN 104060629 A CN104060629 A CN 104060629A
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China
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plate
construction
diaphragm
template
board
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CN201410311428.8A
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Chinese (zh)
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CN104060629B (en
Inventor
王业强
甘建波
张学文
杜湘豪
唐雨
崔红琴
杨杰
何碧波
徐步齐
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中铁十二局集团第七工程有限公司
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Publication of CN104060629A publication Critical patent/CN104060629A/en
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Abstract

The invention discloses a covered top-down excavation subway station overlapped wall construction method and a movable side wall formwork jumbo. The construction method mainly comprises the following steps of: S1, carrying out construction of underground continuous walls; S2, carrying out construction of a top plate and side walls below the top plate; S3, carrying out construction of a middle plate, the side walls above the middle plate and side walls below the middle plate; S4, carrying out construction of the side walls at the middle section of a first ground floor; S5, carrying out construction of a primary bottom plate; S6, carrying out construction of the side walls at the middle section of a second ground floor; and S7, carrying out construction of a secondary bottom plate. According to the method, when the top plate is constructed, the side walls below the top plate are constructed; when the middle plate is constructed, the side walls above the middle plate and the side walls below the middle plate are constructed; and the method has the advantages of high construction efficiency of the side walls at the middle section and high construction quality. The movable side wall formwork jumbo mainly comprises a side wall formwork, a bracket and a movable underframe; the side wall formwork is provided with a concrete pouring port; a chute plate is fixedly arranged above the side wall formwork; and the jumbo has the advantages of reliability of assembling quality of the side wall formwork and convenience for pouring concrete to the side wall sections at the joints of the side walls and the top plate as well as the middle plate.

Description

Lid digs contrary the do superimposed wall construction method in subway station and portable side wall formwork jumbo

Technical field

The present invention relates to lid and dig the contrary device of making Construction Method of Metro Station and being applied to the method, relate in particular to lid and dig contrary the do superimposed wall construction method in subway station and portable side wall formwork jumbo.

Background technology

When lid digs the contrary side wall of making subway station agent structure and diaphragm wall and adopts superimposed wall system, beam main tendon, the main muscle of plate, side wall tension rib all need be pre-buried in diaphragm wall, this embedded ribs not only quantity is many, and easily cause embedded ribs to misplace because placement of cage of reinforcing bar is inaccurate, embedded ribs cannot effectively be connected, cannot play due effect, thereby affect structural entity quality.Simultaneously, station adopts lid to dig contrary sequence method, ground next, the construction after top board, middle plate complete respectively of two layers of side wall, be difficult to carry out concreting with the side wall section of top board, middle plate link position because of limited space, under normal circumstances, side wall concrete adopts the method construction of scaffold building full framing, side wall template, support need mount and dismount repeatedly, large, the consuming time length of workload, affects programming greatly, also has higher potential safety hazard simultaneously; And, be subject to lid to dig the impact of reverse construction operation, the constuction joint position concreting of side wall and plate junction operates very difficult and compactness and cannot ensure.

Summary of the invention

The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, provide a kind of can raising and top board, the construction quality of middle plate link position side wall section and the lid of efficiency of construction dig contrary the do superimposed wall construction method in subway station and portable side wall formwork jumbo.

For solving the problems of the technologies described above, the present invention by the following technical solutions:

A kind of lid digs the contrary superimposed wall construction method in subway station of doing, described superimposed wall comprises a pair of diaphragm wall, be located at the top board between a pair of diaphragm wall, middle plate, first phase base plate and the second stage of base plate, and the side wall arranging along a pair of diaphragm wall inner side, each body of wall and plate body are constructed according to the following steps:

S1: construction of diaphragm wall;

S2: top board and the side wall construction of top board below: excavation top board foundation ditch and top board below side wall groove, carry out successively again diaphragm wall dabbing and chemical cleaning project, template construction, arrangement of reinforcement construction and concrete pouring construction, side wall waterproof construction, form the top board and the top board below side wall that are connected as a single entity with diaphragm wall;

S3: middle plate and middle plate top side wall, middle plate below side wall construction: top board and top board below side wall concrete reach after design strength, carry out B1 soil excavation, plate foundation ditch and middle plate below side wall groove in formation, carry out successively again diaphragm wall dabbing and chemical cleaning project, template construction, side wall waterproof construction, arrangement of reinforcement construction and concrete pouring construction, in the time of template construction, above middle plate foundation ditch, be provided in forming the template of side wall above plate, side wall above the middle plate that formation and diaphragm wall are connected as a single entity after concrete pouring construction and middle plate, middle plate below side wall,

S4: B1 interlude side wall construction: middle plate and middle plate top side wall, middle plate below side wall reach after design strength, B1 interlude side wall is constructed, form the B1 interlude side wall between top board below side wall and middle plate top side wall;

S5: first phase construction of bottom plates: to underground two layers of soil excavation, clear up and tamp after substrate, then to first phase construction of bottom plates, forming the first phase base plate being connected as a single entity with diaphragm wall;

S6: underground two layers of interlude side wall construction: first phase base plate reaches after design strength, carry out underground two layers of interlude side wall construction, the underground two layers of interlude side wall in formation between plate below side wall and first phase base plate;

S7: the second stage of construction of bottom plates: underground two layers of interlude side wall reach after design strength, carry out the second stage of construction of bottom plates, forms the second stage of base plate being connected as a single entity with underground two layers of interlude side wall.

Described step S1: construction of diaphragm wall, comprises step by step following:

S1.1: by measuring setting-out construction guide wall of underground continuous wall, framing job-hopping excavation diaphragm wall foundation trench, and make diaphragm wall reinforcing cage;

S1.2: at diaphragm wall reinforcing cage top, U-shaped is set and hangs muscle, pass and hang muscle with steel shoulder pole, diaphragm wall reinforcing bar cage hoisting is entered to groove, steel shoulder pole is placed in leads wall end face, hang before muscle at making U-shaped, measurement leads wall end face absolute altitude H1, according to diaphragm wall reinforcing cage cage top design elevation H2 and steel shoulder pole thickness H3, calculating the length that U-shaped hangs muscle is L, design formulas: L=(H1-H2)+H3;

S1.3: with 25m 3the speed concreting of/h, building the conduit insertion concrete degree of depth is 1.5m~3m.

In the time carrying out described step S4 and step S6, with portable side wall formwork jumbo auxiliary construction, described portable side wall formwork jumbo comprises side wall template, described side wall template offers concreting mouth and top is installed with chute plate, after described side wall template is placed in to position to be onstructed, portable side wall formwork jumbo is fixed, then completed concreting by described concreting mouth and chute plate.

A kind of portable side wall formwork jumbo, comprise support that side wall template, many Pin are longitudinally arranged in parallel and underframe movably, described side wall template is installed on described support, described support is installed on described underframe, described side wall template offers concreting mouth, and side wall template top is installed with chute plate.

Described underframe comprises underframe longeron and body transom, and each body transom is longitudinally distributed between described underframe longeron and with underframe longeron and is fixedly connected with, and described underframe longeron is provided with longitudinal roller and transverse-roller.

Described underframe longeron comprises the channel-section steel of two opposing Two bors d's oeuveres welding of opening, and described longitudinal roller and transverse-roller are located between two channel-section steels, and described transverse-roller is positioned at body transom and underframe longeron junction.

Described is set up in body transom top, above described transverse-roller, be provided with locator card, described locator card middle part hollow to upper process be step and longitudinally the left and right sides be provided with expansion edge, on both sides expansion edge, open screwed hole, the junction of both sides expansion edge and central protrusion is provided with the locating slot of transverse-roller, described locator card middle part is fastened on described frame bottom and is fixedly connected with support, and both sides are expanded edge and are connected with described underframe longeron bolt.

Described support is at right angles trapezoidal, comprise support brace, the vertically rack rod of layout and the rack cross-bar that Duo Gen transverse horizontal is arranged, described rack cross-bar is fixedly arranged between support brace and rack rod, between adjacent stent cross bar, be provided with cross bar knighthead, between rack cross-bar and rack rod, be provided with vertical rod knighthead, described side wall template is installed on rack rod by template back arris.

Described support brace and rack rod are formed by connecting by two or more, and each section of support brace and rack rod end are provided with junction plate, on described junction plate, establish screw.

The rack cross-bar two ends that are positioned at described frame bottom are provided with the installing tache with screw, each vertical rod knighthead is fixedly connected with by anchoring beam, described anchoring beam comprises at least two band steels, reserved anchor bolt installing space between adjacent band steel, between each band steel, longitudinally uniform welding has reinforcement steel plate, is also installed with the parallel bracing piece connector of many rows on described support brace.

Compared with prior art, the invention has the advantages that:

Lid of the present invention digs the contrary superimposed wall construction method in subway station of doing, in top board construction, side wall below top board is constructed, centering plate upper and lower side wall construction in middle plate construction, again interlude side wall is built, well solve top board and side wall junction, middle plate and the side wall problem that even concrete at place is difficult to build in prior art, greatly improved efficiency of construction and the construction quality of interlude side wall.The present invention is in the time carrying out construction of diaphragm wall, at diaphragm wall reinforcing cage top, U-shaped is set and hangs muscle, in the time that diaphragm wall reinforcing bar cage hoisting is entered to groove, be placed in and lead wall end face with steel shoulder pole, U-shaped hangs the length of muscle in advance by leading wall end face absolute altitude H1, diaphragm wall reinforcing cage cage top design elevation H2 and steel shoulder pole thickness H3 determine, like this can be to diaphragm wall reinforcing cage precise positioning, ensure each pre-buried beam, the position of the main muscle of plate and connector is accurate, thereby guarantee beam, the main muscle of plate and connector can play effective connection function, improve integrally-built quality.When B1 interlude side wall of the present invention and underground two layers of interlude side wall construction, with portable side wall formwork jumbo auxiliary construction, formwork jumbo is can integrated moving in place, do not need repeatedly to carry out template installation, dismounting and carrying, simple to operation, efficiency of construction is higher, construction quality is more reliable.

Portable side wall formwork jumbo of the present invention, side wall template is arranged on removable underframe by support in advance, do not need repeatedly to carry out formwork assembling and disassembling, side wall template assembly reliable in quality, in side wall template, offer concreting mouth, side wall template top is provided with chute plate and facilitates the concreting of side wall and top board junction, side wall and middle plate junction.

Brief description of the drawings

Fig. 1 is that lid of the present invention digs the contrary flow chart of making the superimposed wall construction method in subway station.

Fig. 2 is that lid of the present invention digs the contrary flow chart of making construction of diaphragm wall step in the superimposed wall construction method in subway station.

Fig. 3 is that diaphragm wall reinforcing bar cage hoisting of the present invention enters groove schematic diagram in place.

Fig. 4 is that lid of the present invention digs the contrary structural representation of making the superimposed wall in subway station.

Fig. 5 is the structural representation of the portable side wall formwork jumbo of the present invention.

Fig. 6 is the structural representation of the portable side wall formwork jumbo of the present invention medium-height trestle.

Fig. 7 is the structural representation of removable underframe in the portable side wall formwork jumbo of the present invention.

Fig. 8 is the structural representation of chute plate in the portable side wall formwork jumbo of the present invention.

Fig. 9 is the side wall formwork structure schematic diagram that in the portable side wall formwork jumbo of the present invention, band is built mouth.

Figure 10 is locator card right half part structural representation in the portable side wall formwork jumbo of the present invention.

In figure, each label represents:

100, diaphragm wall; 110, diaphragm wall foundation trench; 120, lead wall; 130, diaphragm wall reinforcing cage; 140, hang muscle; 150, steel shoulder pole; 200, top board; 300, middle plate; 400, first phase base plate; 500, the second stage of base plate; 600, side wall; 610, top board below side wall; 620, middle plate top side wall; 630, middle plate below side wall; 640, B1 interlude side wall; 650, underground two layers of interlude side wall; 700, portable side wall formwork jumbo; 710, side wall template; 711, concreting mouth; 712, chute plate; 713, chute mouth; 714, template back arris; 720, support; 721, locator card; 7211, expand edge; 7212, locating slot; 722, rack cross-bar; 7221, installing tache; 723, rack rod; 724, support brace; 7241, connector; 725, cross bar knighthead; 726, vertical rod knighthead; 727, junction plate; 728, anchoring beam; 729, strengthen steel plate; 730, underframe; 731, underframe longeron; 732, body transom; 733, longitudinal roller; 734, transverse-roller.

Detailed description of the invention

Fig. 1 to Fig. 4 shows lid of the present invention and digs the contrary a kind of embodiment that makes the superimposed wall construction method in subway station, the lid of the present embodiment digs the contrary superimposed wall construction method in subway station of doing, superimposed wall comprises a pair of diaphragm wall 100, be located at top board 200, middle plate 300, first phase base plate 400 and the second stage of base plate 500 between a pair of diaphragm wall 100, and the side wall 600 arranging along a pair of diaphragm wall 100 inner sides, each body of wall and plate body are constructed according to the following steps:

S1: diaphragm wall 100 is constructed;

S2: top board 200 and top board below side wall 610 are constructed: diaphragm wall 100 dabbings and cleaning: excavation top board foundation ditch and top board below 20cm side wall groove, again dabbing is carried out in diaphragm wall 100 surfaces, pre-buried tie bar, connector are exposed, pull straight tension rib, open connector over cap, clean folder mud and butter;

Template construction: after top board foundation ditch, top board beam and side wall channel excavation put in place, perform the thick C20 concrete of 10cm on undisturbed soil surface as topotype, top board beam, side wall groove side surface are built the thick brick wall of 12cm sand finish by laying bricks or stones as side form, topotype, brick wall are laid sheet iron and are isolated, and are convenient to later stage topotype concrete, masonry walls cuts;

Side wall waterproof construction: after the surperficial dabbing of diaphragm wall 100, spraying cement-based capillary crystalline waterproof coating, quantity for spray control is 1.5kg/m 2, after side wall channel excavation puts in place, channel bottom is longitudinally installed rubber watertight strip along station pit, and waterstop is arranged on groove centre position, and half embeds in the fine sand of channel bottom tiling, and half embeds in side wall steel mesh reinforcement;

Arrangement of reinforcement construction: reinforcing bar binding is undertaken by station longitudinal length subdivision, and beam, post and access are avoided in junction, each unit; In diaphragm wall 100, pre-buried tie bar, through side wall steel mesh reinforcement, performs crotch and connects, and main muscle connector is installed in the vertical main muscle of side wall bottom, when connector is installed, the thick fine sand of one deck 20cm that tiles in side wall groove, one of connector is tightened with main muscle, and other end is inserted in fine sand and is protected; Layering colligation top board 200, top board beam steel, according to the horizontal bar that is linked in sequence of " first two ends, rear centre ", two ends horizontal bar is connected with pre-buried connector in diaphragm wall 100, on same level line, between horizontal bar, welds;

Concrete pouring construction: adopt concrete pump or pump truck subdivision to carry out concreting, complete successively side wall, top board beam, top board and build;

Top board 200 and the top board below side wall 610 that rear formation and diaphragm wall 100 be connected as a single entity of having constructed;

S3: middle plate 300 and middle plate top side wall 620, middle plate below side wall 630 are constructed: top board 200 and top board below side wall 610 concrete reach after design strength, carry out B1 soil excavation, plate foundation ditch and middle plate below side wall groove in formation, then carry out successively:

Diaphragm wall 100 dabbings and chemical cleaning project: identical with S2;

Template construction: topotype, the side form construction method of middle plate 300, middle plate-girder and middle plate below side wall 630 are identical with S2, middle plate top side wall 620 constructions at middle plate 300 40cm places, top adopt punching block, fix by pull bar;

Side wall waterproof construction: after the surperficial dabbing of diaphragm wall 100, spraying cement-based capillary crystalline waterproof coating, quantity for spray control is 1.5kg/m 2, middle plate 300 is longitudinally installed waterstop with middle plate top side wall 620, side wall 630 constuction joint positions, junction, middle plate below along foundation ditch, and upper end waterstop is fixed on side wall reinforcing bar and exposes 1/2, and lower end waterstop mounting method is identical with S2;

Arrangement of reinforcement construction: when the vertical main muscle colligation of side wall, adopt sash weight messenger wire, main muscle is aimed at lengthways main steel bar connector pre-buried in the side wall 610 of top board below, main muscle is the reserved lap length in one end upwards, it is main muscle diameter that adjacent main muscle lap length is set to respectively 10d, 45d(d), connector is installed in the downward one end of main muscle, and connector inserts in the fine sand of side wall channel bottom laying, and other Joint Re-bar Constructions are identical with S2;

Concrete pouring construction: identical with S2;

Constructed middle plate 300 that rear formation and diaphragm wall 100 be connected as a single entity and middle plate top side wall 620, middle plate below side wall 630;

S4: B1 interlude side wall 640 is constructed: middle plate 300 and middle plate top side wall 620, middle plate below side wall 630 reach after design strength, and B1 interlude side wall 640 is constructed, and carry out successively:

Diaphragm wall 100 dabbings and chemical cleaning project: identical with S2;

Waterproof construction: after the surperficial dabbing of diaphragm wall 100, spraying cement-based capillary crystalline waterproof coating, quantity for spray control is 1.5kg/m 2, after having sprayed, before and after each side wall unit, rubber watertight strip is vertically installed on edge respectively, waterstop is arranged in the middle of end mould, half embeds in side wall steel mesh reinforcement, second half exposes, in the time that constructing, next unit side wall embeds in steel mesh reinforcement, waterstop upper end and top board below side wall 610 embedded water stop band overlap joints, waterstop lower end and middle plate top side wall 620 embedded water stop band overlap joints, the waterstop inner side pre-buried in B1 interlude side wall 640 upper and lower side constuction joint positions longitudinally buried the disposable Grouting Pipe of φ 12mm underground along foundation ditch, after side wall concrete final set, inject high-strength cement slurry, prevent that concrete setting contraction from producing constuction joint,

Arrangement of reinforcement construction: complete after the 640 inner side transverse horizontal reinforcing bars layings of B1 interlude side wall, carry out vertical main muscle colligation, main muscle upper end and top have applied in the side wall 610 of top board below pre-buried connector and have tightened and be connected, in lower end and middle plate top side wall 620, vertical main muscle is welded to connect, finally carry out B1 interlude side wall 640 transverse horizontal reinforcing bar bindings, and be connected with pre-buried tie bar in diaphragm wall 100;

Template construction: with portable side wall formwork jumbo 700 auxiliary constructions, portable side wall formwork jumbo 700 comprises side wall template 710, side wall template 710 offers concreting mouth 711 and top is installed with chute plate 712, and side wall template 710 is placed in behind position to be onstructed fixing portable side wall formwork jumbo 700;

Concrete pouring construction: B1 interlude side wall 640 height 4.15m in the present embodiment, divide two-layer employing ground pump to carry out concreting, it is 2.15m that first floor is built open height, pump line discharge port, vibrating head are inserted to first row and build mouth, until concrete stops building while rising to 2.0m, sealing first row is built mouth, then build second layer concrete from the chute plate 712 at side wall template 710 tops, in the time that exceeding top constuction joint 10cm, concrete stops building, when concrete starts initial set, artificial chisel, except the part of superelevation, is repaired surface smooth;

After completing construction, form the B1 interlude side wall 640 between top board below side wall 610 and middle plate top side wall 620;

S5: first phase base plate 400 is constructed: to B1 soil excavation, clear up and tamp after substrate, then first phase base plate 400 is constructed, carrying out successively:

Diaphragm wall 100 dabbings and cleaning: identical with S2;

Cushion construction: after underground two layers of excavation of foundation pit put in place, remove substrate compacting, build the thick C20 concrete cushion of 18cm;

Waterproof construction: bed course top applies the thick waterproofing mortar of mixing capillary crystalline waterproof coating material of 2cm, at first phase base plate 400 with side wall 600 junctions along the longitudinal embedded water stop band of foundation ditch

Arrangement of reinforcement construction: while carrying out colligation first phase baseplate reinforcing bar, between horizontal bar, be welded to connect, lower edge reinforcing bar horizontal bar two ends are connected with the pre-buried connector of diaphragm wall 100, upper limb reinforcing bar horizontal bar two ends perform 90 ° of elbows and are connected with side wall reinforcing bar, tension rib bottom performs crotch and is connected with lower edge reinforcing bar, the reserved 10d(d in top is tension rib diameter) lap length, and it is pre-buried to be 90 ° of bendings, for being connected with the second stage of base plate 500;

Concrete pouring construction: identical with S2;

After completing construction, form the first phase base plate 400 being connected as a single entity with diaphragm wall 100;

S6: underground two layers of interlude side wall 650 are constructed: first phase base plate 400 reaches after design strength, carries out underground two layers of interlude side wall 650 and constructs, and carries out successively:

Diaphragm wall 100 dabbings and cleaning: identical with S4;

Waterproof construction: identical with S4;

Arrangement of reinforcement construction: pre-buried the second stage of base plate horizontal bar, horizontal bar two ends mantle fiber, one end is connected with the interior pre-buried connector of diaphragm wall 100, and the other end is installed connector;

Template construction: identical with S4;

Concrete pouring construction: in the present embodiment, underground two layers of interlude side wall 650 are highly 7.0m, on portable side wall formwork jumbo 700,2.15m, 4.15m and 6.15m At The Height are offered concreting mouth and are carried out concreting, the same S4 of casting method respectively;

Completing the underground two layers of interlude side wall 650 between plate below side wall 630 and first phase base plate 400 in forming after construction;

S7: the second stage of base plate 500 is constructed: underground two layers of interlude side wall 650 reach after design strength, carries out the second stage of base plate 500 and constructs, and carries out successively:

Diaphragm wall 100 dabbings and cleaning: identical with S5;

First phase base plate 400 dabbings and cleaning: identical with cleaning method with diaphragm wall 100 dabbings;

Waterproof construction: identical with S5;

Arrangement of reinforcement construction: while carrying out the second stage of base plate steel bar binding, base plate horizontal bar is connected with the pre-buried connector of side wall, is connected by pre-buried tie bar between first phase base plate 400 and the second stage of base plate 500;

Concrete pouring construction: identical with S5;

After completing construction, form the second stage of base plate 500 being connected as a single entity with underground two layers of interlude side wall 650.

The present invention when top board 200 is constructed to top board below side wall 610 construct, when middle plate 300 is constructed, above centering plate, below side wall 620, middle plate, side wall 630 is constructed, respectively B1 interlude side wall 640, underground two layers of interlude side wall 650 are built again, avoid top board 200 and side wall 600 junctions, middle plate 300 and the problem that side wall 600 constuction joint position, junction concrete are difficult to build, greatly improved efficiency of construction and the construction quality of side wall 600; In the time that B1 interlude side wall 640 and underground two layers of interlude side wall 650 are carried out to concreting, the portable side wall formwork jumbo 700 of employing with chute plate 712 coordinates the chute mouth 713 that forms concreting, be convenient to B1 interlude side wall 640 and underground two layers of interlude side wall 650 concrete pouring construction, improved efficiency of construction and construction quality.

In the present embodiment, step S1: diaphragm wall 100 is constructed, comprises step by step following:

S1.1: by measuring setting-out construction guide wall of underground continuous wall 120, framing job-hopping excavation diaphragm wall foundation trench 110, and make diaphragm wall reinforcing cage 130;

S1.2: at diaphragm wall reinforcing cage 130 tops, U-shaped is set and hangs muscle 140, pass and hang muscle 140 with steel shoulder pole 150, diaphragm wall reinforcing cage 130 is lifted into groove, steel shoulder pole 150 is placed in leads wall 120 end faces, hang before muscle 140 at making U-shaped, measure and lead wall 120 end face absolute altitude H1, according to diaphragm wall reinforcing cage 130 cage top design elevation H2 and steel shoulder pole 150 thickness H3, the length that calculating U-shaped hangs muscle 140 is L, design formulas: L=(H1-H2)+H3;

S1.3: with 25m 3the speed concreting of/h, building the conduit insertion concrete degree of depth is 1.5m~3m.

Carrying out diaphragm wall 100 while constructing, at diaphragm wall reinforcing cage 130 tops, U-shaped is set and hangs muscle 140, in the time diaphragm wall reinforcing cage 130 being lifted into diaphragm wall foundation trench 110, be placed in and lead wall 120 end faces with steel shoulder pole 150, U-shaped hangs the length of muscle 140 in advance by leading wall 120 end face absolute altitude H1, diaphragm wall reinforcing cage 130 cage top design elevation H2 and steel shoulder pole 150 thickness H3 determine, like this can be to diaphragm wall reinforcing cage 130 precise positionings, ensure each pre-buried beam, the position of the main muscle of plate and connector is accurate, thereby guarantee beam, the main muscle of plate and connector can play effective connection function, improve the integrally-built quality of superimposed wall.

Fig. 5 to Figure 10 shows a kind of embodiment of the portable side wall formwork jumbo of the present invention, the portable side wall formwork jumbo of the present embodiment, comprise side wall template 710, the support 720 that many Pin are longitudinally arranged in parallel and movably underframe 730, side wall template 710 is installed on support 720, support 720 is installed on underframe 730, side wall template 710 offers concreting mouth 711, side wall template 710 tops are installed with chute plate 712, by side wall template 710 is arranged on removable underframe 730 by support 720 in advance, do not need repeatedly to carry out formwork assembling and disassembling, the assembled reliable in quality of side wall template 710, in side wall template 710, offer concreting mouth 711, side wall template 710 tops are provided with chute plate 712 and are convenient to interlude side wall concrete and build.

In the present embodiment, underframe 730 comprises underframe longeron 731 and body transom 732, each body transom 732 is longitudinally distributed between underframe longeron 731 and with underframe longeron 731 and is fixedly connected with, underframe longeron 731 is provided with longitudinal roller 733 and transverse-roller 734, is convenient to the integrated moving of chassis and in place by longitudinal roller 733 and transverse-roller 734 are set.

In the present embodiment, underframe longeron 731 comprises the channel-section steel of two opposing Two bors d's oeuveres welding of opening, and longitudinally roller 733 and transverse-roller 734 are located between two channel-section steels, and transverse-roller 734 is positioned at body transom 732 and underframe longeron 731 junctions.

In the present embodiment, support 720 is located at body transom 732 tops, above transverse-roller 734, be provided with locator card 721, locator card 721 middle part hollows to upper process be step and longitudinally the left and right sides be provided with expand edge 7211, on both sides expansion edge 7211, open screwed hole, the junction of both sides expansion edge 7211 and central protrusion is provided with the locating slot 7212 of transverse-roller 734, locator card 721 middle parts are fastened on support 720 bottoms and are fixedly connected with support 720, both sides are expanded edge 7211 and are connected with underframe longeron 731 bolts, realize being fixedly connected with of support 720 and underframe 730, stabilized structure is reliable.

In the present embodiment, support 720 is at right angles trapezoidal, comprise support brace 724, the vertically rack rod 723 of layout and the rack cross-bar 722 that Duo Gen transverse horizontal is arranged, rack cross-bar 722 is fixedly arranged between support brace 724 and rack rod 723,722 of adjacent stent cross bars are provided with cross bar knighthead 725, between rack cross-bar 722 and rack rod 723, be provided with vertical rod knighthead 726, side wall template 710 is installed on rack rod 723 by template back arris 714.

In the present embodiment, support brace 724 and rack rod 723 are formed by connecting by two or more, each section of support brace 724 and rack rod 723 ends are provided with junction plate 727, on junction plate, establish screw, connect many rod members by threaded engagement, can adapt to different side wall construction heights, keep away the long strength deficiency that causes of rod member size.

In the present embodiment, on support brace 724, be also installed with the parallel bracing piece connector 7241 of many rows, adopt long steel pipe, fastener, will connect with row's bracing piece connector 7241, further reinforce each Pin support 720.Rack cross-bar 722 two ends that are positioned at support 720 bottoms are provided with the installing tache 7221 with screw, in installing tache 7221, penetrate Lengthened bolt, and Lengthened bolt is fixed on ground.Each vertical rod knighthead 726 is fixedly connected with by anchoring beam 728, anchoring beam 728 comprises at least two band steels, reserved high-strength bolt installing space between adjacent band steel, between each band steel, longitudinally uniform welding has the steel plate 729 of reinforcement, strengthen intensity and reliability that steel plate 729 further promotes anchoring beam 728, adopt φ 32mm high-strength bolt through anchoring beam installing space, to become miter angle to be connected fastening with ground pre-embedded anchoring bolts, realizes the in place of chassis and fix.

Although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention.Any those of ordinary skill in the art, in the situation that not departing from technical solution of the present invention scope, can utilize the technology contents of above-mentioned announcement to make many possible variations and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solution of the present invention,, all should drop in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to the technology of the present invention essence.

Claims (10)

1. a lid digs the contrary superimposed wall construction method in subway station of doing, described superimposed wall comprises a pair of diaphragm wall (100), be located at the top board (200) between a pair of diaphragm wall (100), middle plate (300), first phase base plate (400) and the second stage of base plate (500), and the side wall (600) arranging along a pair of diaphragm wall (100) inner side, it is characterized in that: each body of wall and plate body are constructed according to the following steps:
S1: diaphragm wall (100) construction;
S2: top board (200) and top board below side wall (610) construction: excavation top board foundation ditch and top board below side wall groove, carry out successively again diaphragm wall (100) dabbing and chemical cleaning project, template construction, side wall waterproof construction, arrangement of reinforcement construction and concrete pouring construction, form the top board (200) and the top board below side wall (610) that are connected as a single entity with diaphragm wall (100);
S3: middle plate (300) and middle plate top side wall (620), middle plate below side wall (630) construction: top board (200) and top board below side wall (610) concrete reach after design strength, carry out B1 soil excavation, plate foundation ditch and middle plate below side wall groove in formation, carry out successively again diaphragm wall (100) dabbing and chemical cleaning project, template construction, side wall waterproof construction, arrangement of reinforcement construction and concrete pouring construction, in the time of template construction, above middle plate foundation ditch, be provided in forming the template of side wall (620) above plate, after concrete pouring construction, form the middle plate (300) and the middle plate top side wall (620) that are connected as a single entity with diaphragm wall (100), middle plate below side wall (630),
S4: B1 interlude side wall (640) construction: middle plate (300) and middle plate top side wall (620), middle plate below side wall (630) reach after design strength, B1 interlude side wall (640) is constructed, form the B1 interlude side wall (640) between top board below side wall (610) and middle plate top side wall (620);
S5: first phase base plate (400) construction: to underground two layers of soil excavation, clear up and tamp after substrate, then to first phase base plate (400) construction, forming the first phase base plate (400) being connected as a single entity with diaphragm wall (100);
S6: underground two layers of interlude side wall (650) construction: first phase base plate (400) reaches after design strength, carry out underground two layers of interlude side wall (650) construction, the underground two layers of interlude side wall (650) in formation between plate below side wall (630) and first phase base plate (400);
S7: the second stage of base plate (500) construction: underground two layers of interlude side wall (650) reach after design strength, carry out the second stage of base plate (500) construction, form the second stage of base plate (500) being connected as a single entity with underground two layers of interlude side wall (650).
2. lid according to claim 1 digs against making the superimposed wall construction method in subway station, it is characterized in that: described step S1: diaphragm wall (100) construction, comprises step by step following:
S1.1: by measuring setting-out construction guide wall of underground continuous wall (120), framing job-hopping excavation diaphragm wall foundation trench (110), and make diaphragm wall reinforcing cage (130);
S1.2: at diaphragm wall reinforcing cage (130) top, U-shaped is set and hangs muscle (140), pass and hang muscle (140) with steel shoulder pole (150), diaphragm wall reinforcing cage (130) is lifted into groove, steel shoulder pole (150) is placed in leads wall (120) end face, hang muscle (140) at making U-shaped front, wall (120) end face absolute altitude H1 is led in measurement, according to diaphragm wall reinforcing cage (130) cage top design elevation H2 and steel shoulder pole (150) thickness H3, the length that calculating U-shaped hangs muscle (140) is L, design formulas: L=(H1-H2)+H3;
S1.3: with 25m 3the speed concreting of/h, building the conduit insertion concrete degree of depth is 1.5m ~ 3m.
3. lid according to claim 1 digs the contrary superimposed wall construction method in subway station of doing, it is characterized in that: in the time carrying out described step S4 and step S6, with portable side wall formwork jumbo (700) auxiliary construction, described portable side wall formwork jumbo (700) comprises side wall template (710), described side wall template (710) offers concreting mouth (711) and top is installed with chute plate (712), after described side wall template (710) is placed in to position to be onstructed, portable side wall formwork jumbo (700) is fixed, complete concreting by described concreting mouth (711) and chute plate (712) again.
4. a portable side wall formwork jumbo, it is characterized in that: comprise support (720) that side wall template (710), many Pin are longitudinally arranged in parallel and underframe (730) movably, described side wall template (710) is installed on described support (720), described support (720) is installed on described underframe (730), described side wall template (710) offers concreting mouth (711), and side wall template (710) top is installed with chute plate (712).
5. portable side wall formwork jumbo according to claim 4, it is characterized in that: described underframe (730) comprises underframe longeron (731) and body transom (732), each body transom (732) is longitudinally distributed between described underframe longeron (731) and with underframe longeron (731) and is fixedly connected with, and described underframe longeron (731) is provided with longitudinal roller (733) and transverse-roller (734).
6. portable side wall formwork jumbo according to claim 5, it is characterized in that: described underframe longeron (731) comprises the channel-section steel of two opposing Two bors d's oeuveres welding of opening, described longitudinal roller (733) and transverse-roller (734) are located between two channel-section steels, and described transverse-roller (734) is positioned at body transom (732) and underframe longeron (731) junction.
7. portable side wall formwork jumbo according to claim 6, it is characterized in that: described support (720) is located at body transom (732) top, be provided with locator card (721) in described transverse-roller (734) top, described locator card (721) middle part hollow to upper process be step and longitudinally the left and right sides be provided with and expand edge (7211), on both sides expansion edge (7211), open screwed hole, the junction of both sides expansion edge (7211) and central protrusion is provided with the locating slot (7212) of transverse-roller (734), described locator card (721) middle part is fastened on described support (720) bottom and is fixedly connected with support (720), both sides are expanded edge (7211) and are connected with described underframe longeron (731) bolt.
8. according to portable side wall formwork jumbo described in claim 4 or 7, it is characterized in that: described support (720) is at right angles trapezoidal, comprise support brace (724), the rack rod (723) of vertically arranging and the many rack cross-bars (722) that transverse horizontal is arranged, described rack cross-bar (722) is fixedly arranged between support brace (724) and rack rod (723), between adjacent stent cross bar (722), be provided with cross bar knighthead (725), between rack cross-bar (722) and rack rod (723), be provided with vertical rod knighthead (726), described side wall template (710) is installed on rack rod (723) by template back arris (714).
9. portable side wall formwork jumbo according to claim 8, it is characterized in that: described support brace (724) and rack rod (723) are formed by connecting by two or more, each section of support brace (724) and rack rod (723) end are provided with junction plate (727), and described junction plate is established screw on (727).
10. portable side wall formwork jumbo according to claim 9, it is characterized in that: rack cross-bar (722) two ends that are positioned at described support (720) bottom are provided with the installing tache (7221) with screw, each vertical rod knighthead (726) is fixedly connected with by anchoring beam (728), described anchoring beam (728) comprises at least two band steels, reserved anchor bolt installing space between adjacent band steel, between each band steel, longitudinally uniform welding has reinforcement steel plate (729), is also installed with the parallel bracing piece connector (7241) of many rows on described support brace (724).
CN201410311428.8A 2014-07-02 2014-07-02 The superimposed wall construction method in covered back-digging subway station and portable side wall formwork jumbo CN104060629B (en)

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CN104314069A (en) * 2014-10-15 2015-01-28 中国建筑第八工程局有限公司 Positioning construction method for reserved steel bars of side walls in reverse construction
CN104314069B (en) * 2014-10-15 2016-03-09 中国建筑第八工程局有限公司 Side wall reserved steel bar positioning construction method in reverse construction
CN104695488B (en) * 2015-03-17 2016-08-17 深圳大学建筑设计研究院 A kind of underground outer water proof structure of overlapping wall
CN104695488A (en) * 2015-03-17 2015-06-10 深圳大学建筑设计研究院 Underground composite wall external water-proofing structure
CN105804115A (en) * 2016-02-29 2016-07-27 济南轨道交通集团有限公司 Integrated construction device and construction method for fabricated diaphragm wall or precast pile and fabricated underground station
CN106049531B (en) * 2016-06-08 2018-06-12 瑞洲建设集团有限公司 High-moisture ultra-soft soil box multicell cast in place frame method for tunnel construction
CN106049531A (en) * 2016-06-08 2016-10-26 杭州江润科技有限公司 Construction method for high-water-content ultra-soft soil box type multi-chamber cast-in-place frame tunnel
CN106988319A (en) * 2017-04-10 2017-07-28 中铁隧道集团有限公司 A kind of rapid constructing method of large deep foundation pit agent structure side wall
CN107938701A (en) * 2017-11-23 2018-04-20 上海建科工程咨询有限公司 Subway station covered back-digging overlapping wall construction technology based on prefabricated ground-connecting-wall
CN108571009A (en) * 2018-05-04 2018-09-25 中国建筑第四工程局有限公司 A kind of full covered back-digging subway station side wall construction method
CN108999194A (en) * 2018-08-20 2018-12-14 中铁十二局集团有限公司 A kind of constructing structure and construction method of Deep Foundation Pit of Metro Stations Partial Inverse work
CN110080295A (en) * 2019-04-23 2019-08-02 中铁第四勘察设计院集团有限公司 A kind of lid of assembled vault greatly across no column underground structure digs full-reverse construction method
CN110258640A (en) * 2019-07-11 2019-09-20 吉林大学 A kind of construction method of the overlapping wall system of covered back-digging
CN110258640B (en) * 2019-07-11 2020-07-03 吉林大学 Construction method of superposed wall system for cover-excavation top-down construction

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