CN110004981A - A kind of combined assembled underground structure and reversed construction method - Google Patents
A kind of combined assembled underground structure and reversed construction method Download PDFInfo
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- CN110004981A CN110004981A CN201910356659.3A CN201910356659A CN110004981A CN 110004981 A CN110004981 A CN 110004981A CN 201910356659 A CN201910356659 A CN 201910356659A CN 110004981 A CN110004981 A CN 110004981A
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- prefabricated
- plate
- top plate
- underground structure
- steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
- E02D29/055—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench further excavation of the cross-section proceeding underneath an already installed part of the structure, e.g. the roof of a tunnel
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
Abstract
It include subterranean wall, steel construction card slot, prestressing force jack, main structure column the invention discloses a kind of combined assembled underground structure；Composite water-proof prestressing force top plate is collectively formed in prefabricated top beam, prefabricated top plate, top plate in-situ layer, waterproof roofing layer；Compound middle plate is collectively formed in prefabricated middle stringer, prefabricated middle plate, middle plate in-situ layer；Composite waterproof bottom board is collectively formed in prefabricated bed course, base plate waterproofing, cast-in-place bottom plate；Composite water-proof wall is collectively formed in subterranean wall, side wall waterproof layer, side wall in-situ layer；Plate in composite water-proof prestressing force top plate, combined prestressing force, composite waterproof bottom board are respectively formed effective connection between composite water-proof wall, form full packet waterproof combined assembled underground structure entirely；The problem of to overcome full assembled underground structure percolating water, breach the limitation of assembled underground structure application range, extensive use of the fabricated construction in underground engineering can be effectively promoted in water rich strata, the area application that surrounding enviroment are complicated, Deformation control is high.
Description
Technical field
The invention belongs to underground engineering fields, and in particular to a kind of combined assembled underground structure and reversed construction method,
It is particularly suitable for combined assembled Metro Station Structure and its construction.
Background technique
Existing construction of underground structure such as Metro Station Structure, there are two types of structure type, assembled underground structure and Quan Ming
Cast-in-place underground structure is dug, but all there is respective defect.
Assembled underground structure there are the problem of include:
(1) assembled only one of waterproof system of prefabricated components, there are biggish hidden leakage defects at seam and node；Underground knot
Structure waterproofing grade is level-one, does not allow leak, body structure surface is without wet stain；Therefore, in region of FuShui, assembled underground structure application
By very big restriction, at present at home using few；
(2) because of construction and equipment requirement inner support cannot be arranged, therefore be only applicable to geology in full assembled underground structure
Condition is good, the area of inner support can be substituted with anchor cable；It is answered in middle part, south, southeast weak soil, region of FuShui deep basal pit cable bolting
With being managed and being forbidden, the application of assembled underground structure complete so is greatly restricted, and can not be promoted and applied；
(3) be only applicable in the simple underground double-layer structure of rule, F3/B3, four layers or three across four across etc. structures just can not
Using, it is difficult to it realizes standardization and is widely applied, economic benefits are not high；
(4) full fabricated construction prefabricated components weight is big, and component pattern is complicated, and assembled difficulty is big, and required precision is high, to applying
Work Processes and apparatus requires high.
Just because of full assembled fails to be widely applied, has only done pilot work in individual cities there are problem above.
Full excavation and cast-in-place underground structure is widely used in underground engineering now, there are the problem of include:
(1) a large amount of concrete support, scaffold and template are intersected, and earth excavation, construction environment is poor, and quality is difficult to guarantee；
(2) a large amount of concrete support is poured and is abolished, bracing members are set up, template system construction, occupies long in time limit, investment
It is high；
(3) open cut deformation is big, and especially a large amount of concrete supports and steel branch will be arranged to protect surrounding enviroment in ultra-deep foundation pit
Support, temporary project investment cost are high；
(4) equipment complex pipeline, by beating the fixed bracket such as anchor bolt or expansion bolt, to cast-in-place concrete, there are one for construction
Determine the damage of degree, anchor bolt quality is difficult to be effectively ensured, and durability is poor, needs to regularly replace maintenance, and maintenance difficulties are big, expense
It is high；
(5) cast-in-place rail road against the wind, difficulty of construction is big, and the period is long, is the pain spot and difficult point of construction site.
Therefore, the underground structures such as subway station need the key technical problem that solves to include:
(1) full assembled underground structure, seam is more, and waterproof problem is prominent；
(2) inner support, weak soil and the very big limitation problem of region of FuShui application range can not be arranged in full assembled underground structure；
(3) gap is larger between the prefabricated components of full assembled underground structure, and stress transmitting is uneven, cannot form whole knot
Structure, the deformation that cannot be well adapted for inside and outside foundation pit, there are security risks；
(4) excavation and cast-in-place underground structure temporary project (inner support and template) investment is high, long in time limit, expensive time-consuming, simultaneously
Influence construction quality；
(5) fixation of underground structure comprehensive pipeline and the problem that installation quality is poor, durability is poor, maintenance cost is high；
(6) rail against the wind usually construct after completing AT STATION in road by main body, and construction space is narrow, and difficulty is big, and the period is long.
Summary of the invention
For at least one of prior art the above defects or improvement requirements, the present invention provides a kind of combined assembled
Underground structure and reversed construction method, the problem of overcoming full assembled underground structure percolating water, breach assembled underground knot
The limitation of structure application range can effectively promote dress in water rich strata, the area application that surrounding enviroment are complicated, Deformation control is high
Extensive use with formula structure in underground engineering.A large amount of inner supports and mould of the present invention instead of conventional excavation and cast-in-place structure
Plate is reduced investment outlay；Can prefabricated components be arranged with pre-add axis pressure, balance and the deformation for offsetting assembled gap simultaneously, can effectively be protected
Protect surrounding enviroment, it is ensured that deep pit monitor.Construction of underground structure high quality is realized in prefabricated components batch production production and mechanized construction
And superior quality, substitute traditional furred ceiling finishing, pre-buried channel flow realizes comprehensive pipeline standardization and mechanization installation, reduce investment outlay and
Duration, green construction, energy conservation and environmental protection is technologically advanced, realizes sustainable development and green construction, exploitativeness is strong, in underground work
Journey field has wide application space.
To achieve the above object, according to one aspect of the present invention, a kind of the inverse of combined assembled underground structure is provided
Make construction method, includes the following steps:
S1, construction subterranean wall and main structure column, wherein in subterranean wall the pre-buried prefabricated middle plate of installation steel construction card slot；
S2, crown beam and retaining wall are applied；
S3, it is excavated under top plate beam in terms of spoil, and hoisting prefabricated top beam and prefabricated top plate, wherein prefabricated top plate work
Prefabricated pipeline bracket is embedded in factory's manufacturing process；
S4, the top plate prestressing force jack first passed through between crown beam and prefabricated top plate apply prestressing force to prefabricated top plate, then
Top plate in-situ layer is poured, and top plate flexible waterproof layer of constructing, wherein longitudinally disposed along top plate according to the needs for being unearthed and feeding
Several unearthed and feed openings；
S5, under the support of precast beam system, synchronize downward earth excavation into lower layer under plate-girder in terms of spoil；
S6, using upper layer be unearthed and feed opening, hoisting prefabricated middle stringer and prefabricated middle plate, wherein prefabricated middle plate batch production system
Setting is embedded with the suspension mounting groove in prefabricated pipeline bracket, preheating embedding line casing and prefabricated rail road against the wind, suspension peace during making
Tankage is formed by aftermentioned inverted T-shaped steel bushing；
S7, apply prestressing force to prefabricated middle plate first with the middle board prestress jack in steel construction card slot, then pour
Plate in-situ layer, wherein the unearthed and feed opening of middle plate is corresponding with upper layer；
S8, under the support of precast beam, synchronize downward excavation；And synchronous construction basement one side wall waterproof layer and underground
One layer of side wall in-situ layer；
S9, S5-S7 is recycled downwards, be excavated to foundation pit bottom；
S10, bed course is installed, applies base plate waterproofing, cast-in-place bottom plate；
S11, construction backplane level side wall waterproof layer and backplane level side wall in-situ layer；Synchronous successively polishing is unearthed and feed opening.
Preferably, after S11 further include:
In S12, the completion of combined assembled underground structure main body and adjacent interval coverage after shield-tunneling construction completion, pass through
The pre-buried suspension mounting groove of prefabricated middle plate installs prefabricated rail road against the wind.
Preferably, subterranean wall uses concrete placed under water ground-connecting-wall or prefabricated subterranean wall.
Preferably, in step S1, the construction method of main structure column is pile foundation of first constructing, then lifts steel column and insert
Enter pile foundation, steel column forms steel tube concrete superposed column using steel core concrete column, steel reinforced concrete or external wrapping concrete.
Preferably, reserved groove, prefabricated top beam reserved protrusion tongue and groove when crown beam is constructed, the lifting for prefabricated top plate are pacified
It puts；
Subterranean wall is in the pre-buried steel construction card slot of middle plate elevation location, the reserved protrusion tongue and groove of prefabricated middle stringer, used in prefabricated
The lifting of plate is placed.
To achieve the above object, it is another aspect of this invention to provide that additionally providing a kind of combined assembled underground structure,
In:
Including subterranean wall, main structure column；Underground coping is equipped with the steel of crown beam, the pre-buried prefabricated middle plate of installation in middle part
Structure card slot；Prefabricated top beam is equipped at the top of main structure column, middle part is equipped with prefabricated middle stringer；Between crown beam and prefabricated top plate
Equipped with top plate prestressing force jack, middle board prestress jack is equipped between steel construction card slot and prefabricated middle plate；
It is set between the prefabricated top plate that is arranged between prefabricated top beam, crown beam and prefabricated top beam, adjacent two prefabricated top beam
Composite water-proof is collectively formed in prefabricated top plate, the top plate in-situ layer on top plate, the top plate flexible waterproof layer on top plate in-situ layer set
Prestressing force top plate；
Prefabricated middle plate, the adjacent two prefabricated middle stringer being arranged between prefabricated middle stringer, steel construction card slot and prefabricated middle stringer
Between the prefabricated middle plate, the middle plate in-situ layer on middle plate that are arranged plate in combined prestressing force is collectively formed；
Composite water-proof bottom is collectively formed in prefabricated bed course that substrate is set gradually from bottom to up, base plate waterproofing, cast-in-place bottom plate
Plate；
It is collectively formed to inward side to the side wall waterproof layer and side wall in-situ layer set gradually in subterranean wall and subterranean wall
Composite water-proof wall；
Plate in composite water-proof prestressing force top plate, combined prestressing force, composite waterproof bottom board are each formed between composite water-proof wall
Effect connection, forms full packet waterproof combined assembled underground structure entirely.
Preferably, prefabricated top plate is hung with prefabricated pipeline bracket by built-in groove, forms integral prefabricated part.
Preferably, prefabricated middle plate is hung with prefabricated pipeline bracket and prefabricated rail road against the wind by built-in groove, and up and down
Equipped with preheating embedding line casing, integral prefabricated part is formed.
Preferably, main structure column includes pile foundation and steel column, and steel column is inserted into pile foundation, and steel column uses steel pipe
Concrete column, steel reinforced concrete or external wrapping concrete form steel tube concrete superposed column.
Preferably, groove is reserved on the inside of crown beam, the reserved protrusion tongue and groove in prefabricated top beam two sides, prefabricated middle stringer two sides are reserved
Protrude tongue and groove.
Preferably, in combined assembled underground structure and reversed construction method above-mentioned, the prefabricated rail in subway station is used
Road against the wind, in which: road includes rail wall, rail road right-side wall, rail top air channel base plate, inverted U-shaped against the wind on the left of road against the wind to prefabricated rail against the wind
Reinforcing bar, longitudinal perforation, longitudinally locked reinforcing bar；
Road right-side wall, rail top air channel base plate constitute bathtub construction to the rail against the wind for road left side wall, rail against the wind；The rail is against the wind
The top of wall, rail road right-side wall against the wind is embedded with several inverted U-shaped reinforcing bars along longitudinal direction on the left of road, the inverted U-shaped reinforcing bar it is upper
Protruding side wall top portion, portion formed closed loop, for wear pin provoke the inverted U-shaped reinforcing bar and integrally embedment subway station it is prefabricated
It pours and is integrated in the prefabricated hole slot of middle plate；
Wall and rail are against the wind in road right-side wall, perforation opens up along longitudinal direction below the inverted U-shaped reinforcing bar on the left of road against the wind for the rail
There is longitudinal perforation, for penetrating the longitudinally locked reinforcing bar, to fix the adjacent prefabricated rail of two panels road against the wind.
Preferably, road further includes operation hand hole and steel bushing to prefabricated rail against the wind；
The longitudinal direction in the every prefabricated rail end of the longitudinally locked reinforcing bar in road and contiguous prefabricated rail road against the wind against the wind
The end of locking reinforcing bar is fastenedly connected by the steel bushing；
The operation hand hole is formed in the local wide at longitudinal perforation both ends, is open to side wall lateral outer side
Hole slot is fastenedly connected for the steel bushing and provides operating space and can be filled sealing.
Preferably, road further includes elastic sealing gasket to prefabricated rail against the wind；
In prefabricated rail, road seam crossing is laid against the wind for the seam crossing of the prefabricated middle plate of road and subway station and adjacent rail against the wind
Elastic sealing gasket, to rail, road is sealed against the wind；
Prefabricated rail against the wind the seam crossing of the prefabricated middle plate of road and subway station elastic sealing gasket setting the rail against the wind
On the left of road wall and rail against the wind on the right side of road coping, the inverted U-shaped reinforcing bar lateral side；
Adjacent rail against the wind road seam crossing elastic sealing gasket along rail against the wind road flute profile be arranged.
Preferably, in combined assembled underground structure and reversed construction method above-mentioned, the prefabricated rail in subway station is used
The connecting joint structure in road and prefabricated middle plate against the wind, in which: including the prefabricated rail in foregoing subway station road, subway against the wind
The prefabricated middle plate stood；
Several special T steel sets are embedded in the prefabricated middle plate, plate thickness direction up and down；Two special T
Shape steel bushing partner lateral setting, corresponding respectively to the rail, wall, rail against the wind stretch out at the top of road right-side wall on the left of road against the wind
The inverted U-shaped reinforcing bar, for its insertion；
The special T steel set is upper and lower T shape dimerous, and the pin is stuck in the top of the T shape.
Preferably, the special T steel set top is horizontal bush, lower part is vertical sleeve, in the prefabricated middle plate
In prefabrication casting process, it is respectively formed the middle plate groove on top and the middle plate vertical core of lower part；
The inverted U-shaped reinforcing bar passes through in the middle plate vertical core, and protrudes into the middle plate groove；The pin is arranged in institute
It states in plate groove, across the top closed loop of the inverted U-shaped reinforcing bar, and is crossed on the both ends of the middle plate vertical core, provokes support
The inverted U-shaped reinforcing bar；
Packing material is poured in the middle plate groove and middle plate vertical core, road is connected as with prefabricated middle plate against the wind by prefabricated rail
One entirety.
Preferably, connecting joint structure further includes spacer bar；
The multipair special T steel set is arranged successively along the longitudinal direction of subway station, and every a pair special T steel set is internal
Between, between the adjacent pairs of special T steel set general frame is fixed as by the spacer bar, and be embedded to institute
State pouring in material for prefabricated middle plate.
Preferably, the pin shape is wedge shape, and the absolute altitude for adjusting prefabricated rail road against the wind makes described in it is bonded
Prefabricated middle plate.
Preferably, tube coupling seam crossing in road uses the positive Parapet slot interface of the yin of reserved mesoporous to contiguous prefabricated rail against the wind, and in yin-yang
Grouting Pipe is set on Parapet slot interface.
Preferably, in combined assembled underground structure and reversed construction method above-mentioned, the prefabricated rail in subway station is used
The construction method of the connecting joint structure of road and prefabricated middle plate against the wind, wherein include the following steps:
S1, prefabricated rail road against the wind is made in factory, prefabricated rail pre-buried several reinforcing bars of falling shape in road both ends side wall top against the wind；Work
The special T steel set of factory's processing and fabricating；
In S2, construction binding before slab muscle, the special T steel set of pre-buried factory's production；By special T shape when pouring middle plate
Steel bushing forms the middle plate groove on top and the middle plate vertical core of lower part in middle plate, to make prefabricated middle plate；
S3, in the construction of subway station hoisting prefabricated middle plate in place after, by prefabricated rail after road transports scene to against the wind, top
Hold in the palm prefabricated rail road to predetermined position against the wind；
S4, the prefabricated rail of jacking below road to prefabricated middle plate, make in inverted U-shaped reinforcing bar insertion in plate vertical core, and extend out to against the wind
In middle plate groove；
S5, pin is squeezed into reserved middle plate groove, passes through inverted U-shaped reinforcing bar, pin both ends are taken in middle plate vertical core
Both sides form shoulder pole shape, inverted U-shaped reinforcing bar are provoked, to fix prefabricated rail road against the wind；
S6, the longitudinally locked steel that TBE (threaded both ends) is penetrated in prefabricated the rail against the wind reserved longitudinal perforation of road left and right side walls
Muscle, making the prefabricated rail newly installed, road is fixed in road against the wind with upper a piece of prefabricated rail against the wind；
S7, S3-S6 is repeated, until all prefabricated rails are installed in road against the wind, and realizes fastening；
Road assembly finishes against the wind for S8, rail, finally special T steel set in pour sealing material, make prefabricated middle plate with it is prefabricated
Road forms entirety to rail against the wind.
Preferably, after the completion of S5, at this point, road is fitted closely with prefabricated middle plate prefabricated rail against the wind, against the wind by rail
Wall and rail road right-side wall top preset elastic sealing gasket against the wind on the left of road realize the close of prefabricated rail road and prefabricated middle plate against the wind
Envelope；
After S8, further includes:
S9, filler is injected out of the prefabricated rail of two panels against the wind the pre-buried Grouting Pipe of road seam crossing, blind guarantees closed
Property.
Above-mentioned preferred feature can be combined with each other as long as they do not conflict with each other.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, have below beneficial to effect
Fruit:
(1) environmental protection and energy saving, green construction: no concrete inner support constructs and abolishes work, without setting up a large amount of steel branch
Support, scaffold and template, environmental protection and energy saving, green construction.
(2) composite construction quality is high, and waterproof performance is good: by a layer concrete cast-in-place on prefabricated components, then adding one
Layer flexible waterproof layer, the full packet waterproof of this cast-in-place, prefabricated, flexible water " three-in-one " combined assembled underground structure entirely, gram
Fabricated construction waterproof problem and application limitation are taken, waterproof quality and performance greatly promote, and can meet water rich strata a century work
Journey waterproof and life requirement can effectively promote extensive use of the combined assembled structure in underground engineering.
(3) speed of application is fast, saves the duration: without a large amount of concrete support of constructing, reducing inner support construction and hardening
Duration；Inner support system is formed by splicing prefabricated components, efficiently quickly；Cast-in-place concrete layer can be opened with lower part cubic metre of earth
Synchronous progress is dug, earth excavation is on earth；Prefabrication cast-in-place structure forms dry working environment, can not be by the interference of wind and frost sleet, wind
The without hindrance construction of rain.It is unearthed according to construction and feeds needs, main body is longitudinally disposed a certain number of unearthed AT STATION every a distance
Feed opening.The above several points resultant force, can greatly save the duration, accelerate construction progress.Top plate precast beam system, in-situ layer and waterproof
After the completion of layer, can move back pipeline and backfill earthing, resume traffic, can reduce the influence to urban transportation and pipeline.
(4) it is not necessarily to inner support and template system, cost saving: the advantages of utilizing efficient prefabricated components, rapid shaping,
The inner support and scaffold template system of underground engineering are substituted, from top to bottom adverse construction method underground main structure, it is big that no setting is required
Concrete support, bracing members and the interim column of amount can greatly save engineering throwing without a large amount of scaffold and template is arranged
Money.
(5) pre-add axis pressure apparatus is arranged in precast assembly component, precast beam component can be arranged pre-add axis pressure, balance
Deformation with assembled gap is offset, can effectively protect surrounding enviroment, it is ensured that deep pit monitor.Geological conditions is poorer, foundation pit is deeper, more
Wide, bigger, prefabricated more prominent with cast-in-place concrete inner support system advantage, economic benefits are also higher.
(6) it realizes clear-water concrete style, substitution finishing: by using punching block with ribbing, with official documents and correspondence, realizing quality
Precast construction that is good, having certain stereoscopic effect, substitutes traditional finishing, reduces investment outlay.
(7) by the pre-buried channel flow on prefabricated components, line equipment is hung, it can be achieved that mechanization installation and assembled are applied
Work, the method for substituting traditional big expansion bolt of punching, improves durability and quality, has efficiently solved traditional anchor bolt fixation
Problem.
(8) prefabricated rail road against the wind, batch production production and mechanization installation can reduce the construction in cast-in-place concrete rail road against the wind
Difficulty improves effect and quality, accelerates construction progress.
Detailed description of the invention
Fig. 1 is the whole schematic elevation view of combined assembled underground structure of the invention；
Fig. 2 is one of the process schematic of reversed construction method of combined assembled underground structure of the invention；
Fig. 3 is the two of the process schematic of the reversed construction method of combined assembled underground structure of the invention；
Fig. 4 is the three of the process schematic of the reversed construction method of combined assembled underground structure of the invention；
Fig. 5 is the overall schematic of the combined assembled underground structure after present invention completion；
Fig. 6 is the general flow chart of the reversed construction method of combined assembled underground structure of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.The present invention is described in more detail With reference to embodiment.
As a kind of better embodiment of the invention, as shown in Figure 1,5, combined assembled underground structure of the invention,
Wherein:
Including subterranean wall 1, main structure column；Underground coping is equipped with the pre-buried prefabricated middle plate of installation in crown beam 5, middle part
Steel construction card slot 2, positioning and rest when for the lifting of prefabricated middle plate, the height of card slot is greater than middle plate thickness, when subterranean wall card slot
Absolute altitude there are when error allow both relative movement, can still ensure in plate be located at designed elevation；It is set at the top of main structure column
There are prefabricated top beam 8, middle part to be equipped with prefabricated middle stringer 15.Main structure column includes pile foundation 3 and steel column 4, and steel column 4 needs
It is inserted into 3 certain depth of pile foundation, guarantees that the two realizes reliable connection；Steel column 4 using steel core concrete column, steel reinforced concrete or
External wrapping concrete forms steel tube concrete superposed column.Top plate prestressing force jack 11, steel are equipped between crown beam 5 and prefabricated top plate 9
Middle board prestress jack 19 is equipped between structure card slot 2 and prefabricated middle plate 16.In view of prefabricated components installation positioning need to be reserved
Certain error, it is pre- to top plate prefabricated components, middle plate respectively by top plate prestressing force jack 11, middle board prestress jack 19
Component processed applies transverse prestress, to balance and offset reserved error, controls the deformation of subterranean wall, it is ensured that foundation pit and periphery construction
The safety and stability of object.Each prefabricated board locks rod iron by using deformed bar or section by section, longitudinally (in paper just by prefabricated board
To) tensioning fixation is carried out into an entirety.
The prefabricated top plate 9 that is arranged between prefabricated top beam 8, crown beam 5 and prefabricated top beam 8, adjacent two prefabricated top beam 8 it
Between the prefabricated top plate 9, the top plate in-situ layer 12 on top plate, the top plate flexible waterproof layer 13 on top plate in-situ layer that are arranged be collectively formed
Composite water-proof prestressing force top plate.
It is the prefabricated middle plate 16 that is arranged between prefabricated middle stringer 15, steel construction card slot 2 and prefabricated middle stringer 15, adjacent two prefabricated
Plate in combined prestressing force is collectively formed in middle plate in-situ layer 20 on the prefabricated middle plate 16 that is arranged between middle stringer 15, middle plate.
Prefabricated bed course 23 that substrate is set gradually from bottom to up, base plate waterproofing 24, cast-in-place bottom plate 25 are collectively formed compound
Waterproof bottom plate.
It is collectively formed to inward side to the side wall waterproof layer and side wall in-situ layer set gradually in subterranean wall 1 and subterranean wall
Composite water-proof wall.
As shown in Figure 1, prefabricated top plate 9 is hung with prefabricated pipeline bracket 10 by built-in groove, integral prefabricated part is formed.It is prefabricated
Middle plate 16 is hung with prefabricated pipeline bracket 10 and prefabricated rail road 28 against the wind by built-in groove, and is equipped with preheating embedding line set up and down
Pipe 18 forms integral prefabricated part.Groove, the reserved protrusion tongue and groove in prefabricated 8 two sides of top beam, prefabricated middle stringer are reserved on the inside of crown beam 5
The reserved protrusion tongue and groove in 15 two sides, is placed convenient for the lifting of prefabricated top plate 9 and prefabricated middle plate 16.
Plate in composite water-proof prestressing force top plate, combined prestressing force, composite waterproof bottom board are each formed between composite water-proof wall
Effect connection the problem of forming full packet waterproof combined assembled underground structure entirely, overcome full assembled underground structure percolating water, is dashed forward
The limitation of assembled underground structure application range has been broken, can have been answered in water rich strata, the area that surrounding enviroment are complicated, Deformation control is high
With can effectively promote extensive use of the fabricated construction in underground engineering.The present invention is instead of conventional excavation and cast-in-place structure
A large amount of inner supports and template, reduce investment outlay；Pre-add axis pressure can be set to prefabricated components simultaneously, balance and offset assembled gap
Deformation, can effectively protect surrounding enviroment, it is ensured that deep pit monitor.Underground is realized in prefabricated components batch production production and mechanized construction
Structural Engineering high quality and superior quality, substitute traditional furred ceiling finishing, and pre-buried channel flow realizes comprehensive pipeline standardization and mechanization
Installation, reduces investment outlay and the duration, and green construction, energy conservation and environmental protection is technologically advanced, realizes sustainable development and green construction, can be real
Shi Xingqiang has wide application space in underground engineering field.
As shown in figures 1 to 6, the reversed construction method of combined assembled underground structure of the invention includes the following steps (step
Rapid S1-S4 is shown in that Fig. 2, S5-S8 are shown in that Fig. 3, S9-S11 are shown in Fig. 4, sees that Fig. 5, general flow chart are shown in Fig. 6 after S12 completion):
S1, construction subterranean wall 1 and main structure column, wherein in subterranean wall 1 the pre-buried prefabricated middle plate of installation steel construction card
Slot 2；In step S1, subterranean wall 1 uses concrete placed under water ground-connecting-wall or prefabricated subterranean wall；The construction party of main structure column
Method is pile foundation 3 of first constructing, then lifts steel column 4 and be inserted into pile foundation 3, and steel column 4 uses steel core concrete column, fashioned iron coagulation
Soil or external wrapping concrete form steel tube concrete superposed column.
S2, crown beam 5 and retaining wall 6 are applied.
S3, it is excavated under top plate beam 7 in terms of spoil, and hoisting prefabricated top beam 8 and prefabricated top plate 9, wherein prefabricated top
Prefabricated pipeline bracket 10 is embedded in plate batch production manufacturing process.Preferably, reserved groove, prefabricated top beam 8 when crown beam 5 is constructed
Reserved protrusion tongue and groove, the lifting for prefabricated top plate 9 are placed.
S4, the top plate prestressing force jack 11 first passed through between crown beam 5 and prefabricated top plate 9 apply pre- answer to prefabricated top plate 9
Power, then top plate in-situ layer 12 is poured, and top plate flexible waterproof layer 13 of constructing, wherein according to the needs for being unearthed and feeding, along top plate
Longitudinally disposed several unearthed and feed openings.
S5, under the support of precast beam system, synchronize downward earth excavation into lower layer under plate-girder 14 in terms of spoil.
Preferably, between S4-S5, after the completion of top plate precast beam system, in-situ layer and waterproof layer, it can move back pipeline and backfill is covered
Soil resumes traffic, and can reduce the influence to urban transportation and pipeline.
S6, using upper layer be unearthed and feed opening, hoisting prefabricated middle stringer 15 and prefabricated middle plate 16, wherein prefabricated Zhong Ban factory
Change manufacturing process in setting be embedded with prefabricated pipeline bracket 17, preheating embedding line casing 18 and prefabricated rail against the wind road 28 suspension installation
Slot 29.Subterranean wall 1 is in the pre-buried steel construction card slot 2 of middle plate elevation location, the reserved protrusion tongue and groove of prefabricated middle stringer 15, used in prefabricated
The lifting of plate 16 is placed.When lifting, it is inserted into the reserved steel construction card slot 2 of diaphram wall 1, is placed in prefabricated on one side on one side
On the reserved middle stringer tongue and groove of stringer 15.
S7, apply prestressing force to prefabricated middle plate 16 first with the middle board prestress jack 19 in steel construction card slot 2, then pour
Build middle plate in-situ layer 20, wherein the unearthed and feed opening of middle plate is corresponding with upper layer.
S8, under the support of precast beam, synchronize downward excavation；And synchronous construction basement one side wall waterproof layer 21 and ground
Next layer of side wall in-situ layer 22.
S9, S5-S7 is recycled downwards, be excavated to foundation pit bottom.
S10, the prefabricated bed course 23 of installation, base plate waterproofing 24, cast-in-place bottom plate 25 are applied.
S11, construction backplane level side wall waterproof layer 26 and backplane level side wall in-situ layer 27；Synchronous successively polishing is unearthed and charging
Hole.
Preferably, after S11 further include:
In S12, the completion of combined assembled underground structure main body and adjacent interval coverage after shield-tunneling construction completion, pass through
The pre-buried suspension mounting groove 29 of prefabricated middle plate installs prefabricated rail road 28 against the wind.
Full packet waterproof of the invention combined assembled underground structure and construction method entirely, without setting up in entire work progress
Support and template, under plate upper plate can synchronous construction operation, the time for waiting age to be formed greatly shortens, and has green construction, fast
Convenient, the safe and efficient, environmental protection and energy saving of speed, a series of advantages such as reduce investment outlay, have wide application space.
Top plate and middle plate prefabricated member and in-situ layer substitution inner support and template, work progress, utilizes setting from top to bottom
Unearthed feed opening, be unearthed, charging, the disengaging of hoisting prefabricated middle plate, make-up machinery, bottom plate closing and side wall it is complete it is rear after, main body knot
Structure has completed.
Structure cast-in-place layer, including top plate in-situ layer, middle plate in-situ layer, cast-in-place bottom plate, using prefabricated components as mould when pouring
Plate can save a large amount of templates.
Complete combined assembled Underground Construction method, constructs from top to bottom, using top plate prefabricated components and in-situ layer, in
Plate prefabricated member and in-situ layer substitute inner support system, can effectively protect foundation pit periphery building, save a large amount of construction investments.
Complete combined assembled Underground Construction method, constructs from top to bottom, using top plate prefabricated components and in-situ layer, in
Plate prefabricated member and in-situ layer substitute inner support system, can effectively protect foundation pit periphery building, save a large amount of construction investments.It examines
Certain error need to be reserved by considering prefabricated components installation positioning, pass through top plate prestressing force jack, middle board prestress jack point
It is other that transverse prestress is applied to top plate prefabricated components, middle plate prefabricated member, to balance and offset reserved error, control subterranean wall
Deformation, it is ensured that the safety and stability of foundation pit and periphery building.Each prefabricated board locks steel by using deformed bar or section by section
Prefabricated board longitudinal (direction in paper) is carried out tensioning fixation into an entirety by stick.
Each prefabricated components splicing assembly of structure is completed, and mounting structure is formed by tongue-and-groove, high strength exploitation；Preformed pad
Cast-in-place concrete structure also can be used in layer.
Combined assembled underground structure of the invention and its construction method are suitable for basement one, two layers and more layers, can
According to requirement of engineering suitable for no column single span, single-column twin spans, twin columns three across or more across multi-layer underground structure.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of reversed construction method of combined assembled underground structure, which comprises the steps of:
S1, construction subterranean wall (1) and main structure column, wherein in subterranean wall (1) the pre-buried prefabricated middle plate of installation steel construction card
Slot (2)；
S2, crown beam (5) and retaining wall (6) are applied；
S3, it is excavated under top plate beam in terms of spoil (7), and hoisting prefabricated top beam (8) and prefabricated top plate (9), wherein prefabricated
Prefabricated pipeline bracket (10) are embedded in top plate batch production manufacturing process；
S4, the top plate prestressing force jack (11) first passed through between crown beam (5) and prefabricated top plate (9) apply to prefabricated top plate (9)
Prestressing force, then top plate in-situ layer (12) are poured, and construct top plate flexible waterproof layer (13), wherein according to the need for being unearthed and feeding
It wants, along the longitudinally disposed several unearthed and feed openings of top plate；
S5, under the support of precast beam system, synchronize downward earth excavation into lower layer under plate-girder in terms of spoil (14)；
S6, using upper layer be unearthed and feed opening, hoisting prefabricated middle stringer (15) and prefabricated middle plate (16), wherein prefabricated Zhong Ban factory
Change manufacturing process in setting be embedded with prefabricated pipeline bracket (17), preheating embedding line casing (18) and prefabricated rail against the wind road (28) hang
It hangs mounting groove (29)；
S7, apply prestressing force to prefabricated middle plate (16) first with the middle board prestress jack (19) in steel construction card slot (2), then
Pour middle plate in-situ layer (20), wherein the unearthed and feed opening of middle plate is corresponding with upper layer；
S8, under the support of precast beam, synchronize downward excavation；And synchronous construction basement one side wall waterproof layer (21) and underground
One layer of side wall in-situ layer (22)；
S9, S5-S7 is recycled downwards, be excavated to foundation pit bottom；
S10, the prefabricated bed course (23) of installation, base plate waterproofing (24), cast-in-place bottom plate (25) are applied；
S11, construction backplane level side wall waterproof layer (26) and backplane level side wall in-situ layer (27)；Synchronous successively polishing is unearthed and charging
Hole.
2. the reversed construction method of combined assembled underground structure as described in claim 1, it is characterised in that:
After S11 further include:
In S12, the completion of combined assembled underground structure main body and adjacent interval coverage after shield-tunneling construction completion, by prefabricated
The pre-buried suspension mounting groove (29) of middle plate installs prefabricated rail road (28) against the wind.
3. the reversed construction method of combined assembled underground structure as described in claim 1, it is characterised in that:
Subterranean wall (1) uses concrete placed under water ground-connecting-wall or prefabricated subterranean wall.
4. the reversed construction method of combined assembled underground structure as described in claim 1, it is characterised in that:
In step S1, the construction method of main structure column is first to construct pile foundation (3), then lift steel column (4) insertion pile foundation
Plinth (3), steel column (4) form steel tube concrete superposed column using steel core concrete column, steel reinforced concrete or external wrapping concrete.
5. the reversed construction method of combined assembled underground structure as described in claim 1, it is characterised in that:
Reserved groove, prefabricated top beam (8) reserved protrusion tongue and groove when crown beam (5) is constructed, the lifting for prefabricated top plate (9) are pacified
It puts；
Subterranean wall (1) is used in the pre-buried steel construction card slot (2) of middle plate elevation location, the reserved protrusion tongue and groove of prefabricated middle stringer (15)
The lifting of prefabricated middle plate (16) is placed.
6. a kind of combined assembled underground structure, it is characterised in that:
Including subterranean wall (1), main structure column；Underground coping is equipped with the pre-buried prefabricated middle plate of installation in crown beam (5), middle part
Steel construction card slot (2)；Prefabricated top beam (8) are equipped at the top of main structure column, middle part is equipped with prefabricated middle stringer (15)；Crown beam
(5) top plate prestressing force jack (11) is equipped between prefabricated top plate (9), between steel construction card slot (2) and prefabricated middle plate (16)
Equipped with middle board prestress jack (19)；
The prefabricated top plate (9) that is arranged between prefabricated top beam (8), crown beam (5) and prefabricated top beam (8), adjacent two prefabricated top are vertical
Prefabricated top plate (9), the top plate in-situ layer (12) on top plate, the top plate flexible water on top plate in-situ layer being arranged between beam (8)
Composite water-proof prestressing force top plate is collectively formed in layer (13)；
The prefabricated middle plate (16) that is arranged between prefabricated middle stringer (15), steel construction card slot (2) and prefabricated middle stringer (15), adjacent two
Combined prestressing force is collectively formed in middle plate in-situ layer (20) on the prefabricated middle plate (16) that is arranged between prefabricated middle stringer (15), middle plate
Middle plate；
Prefabricated bed course (23) that substrate is set gradually from bottom to up, base plate waterproofing (24), cast-in-place bottom plate (25) are collectively formed multiple
Close waterproof bottom plate；
It is collectively formed to inward side to the side wall waterproof layer and side wall in-situ layer set gradually in subterranean wall (1) and subterranean wall multiple
Close mine dam；
Plate in composite water-proof prestressing force top plate, combined prestressing force, composite waterproof bottom board are respectively formed between composite water-proof wall and effectively connect
It connects, forms full packet waterproof combined assembled underground structure entirely.
7. combined assembled underground structure as claimed in claim 6, it is characterised in that:
Prefabricated top plate (9) is hung with prefabricated pipeline bracket (10) by built-in groove, forms integral prefabricated part.
8. combined assembled underground structure as claimed in claim 6, it is characterised in that:
Prefabricated middle plate (16) is hung with prefabricated pipeline bracket (10) and prefabricated rail road (28) against the wind by built-in groove, and up and down
Equipped with preheating embedding line casing (18), integral prefabricated part is formed.
9. combined assembled underground structure as claimed in claim 6, it is characterised in that:
Main structure column includes pile foundation (3) and steel column (4), and steel column (4) is inserted into pile foundation (3), and steel column (4) uses
Steel core concrete column, steel reinforced concrete or external wrapping concrete form steel tube concrete superposed column.
10. combined assembled underground structure as claimed in claim 6, it is characterised in that:
Groove is reserved on the inside of crown beam (5), the reserved protrusion tongue and groove in prefabricated top beam (8) two sides, prefabricated middle stringer (15) two sides are reserved
Protrude tongue and groove.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700272A (en) * | 2019-10-31 | 2020-01-17 | 广东省水利水电第三工程局有限公司 | Closed construction method |
| CN111593861A (en) * | 2020-04-14 | 2020-08-28 | 中铁第四勘察设计院集团有限公司 | Connecting structure of prefabricated rail top air duct and structural slab and construction method thereof |
| WO2021031859A1 (en) * | 2019-08-22 | 2021-02-25 | 上海建工二建集团有限公司 | Slab lowering construction method for underground structure in reverse construction method |
| CN113846695A (en) * | 2021-11-30 | 2021-12-28 | 中铁建工集团有限公司 | Reverse construction method basement construction method |
| CN114775690A (en) * | 2022-06-17 | 2022-07-22 | 北京建工土木工程有限公司 | Temporary bearing device for roof by cover-excavation method and construction method thereof |
| CN115341576A (en) * | 2022-09-19 | 2022-11-15 | 中铁第六勘察设计院集团有限公司 | Control method and device for inducing uplift deformation of underlying tunnel by foundation pit excavation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912010A (en) * | 2014-04-04 | 2014-07-09 | 北京城建设计发展集团股份有限公司 | Construction method of open excavation prefabricated underground structure |
| CN105951880A (en) * | 2016-05-09 | 2016-09-21 | 江苏鸿基节能新技术股份有限公司 | Assembled underground structure of precast concrete planks and construction method thereof |
| CN106168035A (en) * | 2016-08-17 | 2016-11-30 | 广州地铁设计研究院有限公司 | The subassembly formula construction method of subassembly formula underground structure and underground structure |
| CN205776348U (en) * | 2016-06-24 | 2016-12-07 | 中国建筑股份有限公司 | A kind of overlapping monoblock type pipe gallery prefabricated assembly structural |
| CN109235499A (en) * | 2018-07-20 | 2019-01-18 | 广州地铁设计研究院股份有限公司 | A kind of open cut hypogee Standard formula construction method |
| CN210086295U (en) * | 2019-04-29 | 2020-02-18 | 中铁第四勘察设计院集团有限公司 | Compound assembled underground structure |
-
2019
- 2019-04-29 CN CN201910356659.3A patent/CN110004981A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912010A (en) * | 2014-04-04 | 2014-07-09 | 北京城建设计发展集团股份有限公司 | Construction method of open excavation prefabricated underground structure |
| CN105951880A (en) * | 2016-05-09 | 2016-09-21 | 江苏鸿基节能新技术股份有限公司 | Assembled underground structure of precast concrete planks and construction method thereof |
| CN205776348U (en) * | 2016-06-24 | 2016-12-07 | 中国建筑股份有限公司 | A kind of overlapping monoblock type pipe gallery prefabricated assembly structural |
| CN106168035A (en) * | 2016-08-17 | 2016-11-30 | 广州地铁设计研究院有限公司 | The subassembly formula construction method of subassembly formula underground structure and underground structure |
| CN109235499A (en) * | 2018-07-20 | 2019-01-18 | 广州地铁设计研究院股份有限公司 | A kind of open cut hypogee Standard formula construction method |
| CN210086295U (en) * | 2019-04-29 | 2020-02-18 | 中铁第四勘察设计院集团有限公司 | Compound assembled underground structure |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021031859A1 (en) * | 2019-08-22 | 2021-02-25 | 上海建工二建集团有限公司 | Slab lowering construction method for underground structure in reverse construction method |
| CN110700272A (en) * | 2019-10-31 | 2020-01-17 | 广东省水利水电第三工程局有限公司 | Closed construction method |
| CN111593861A (en) * | 2020-04-14 | 2020-08-28 | 中铁第四勘察设计院集团有限公司 | Connecting structure of prefabricated rail top air duct and structural slab and construction method thereof |
| CN113846695A (en) * | 2021-11-30 | 2021-12-28 | 中铁建工集团有限公司 | Reverse construction method basement construction method |
| CN113846695B (en) * | 2021-11-30 | 2022-03-15 | 中铁建工集团有限公司 | Reverse construction method basement construction method |
| CN114775690A (en) * | 2022-06-17 | 2022-07-22 | 北京建工土木工程有限公司 | Temporary bearing device for roof by cover-excavation method and construction method thereof |
| CN115341576A (en) * | 2022-09-19 | 2022-11-15 | 中铁第六勘察设计院集团有限公司 | Control method and device for inducing uplift deformation of underlying tunnel by foundation pit excavation |
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