CN106869172A - In-situ deposited prefabricated split-mounting type subway underground station construction method - Google Patents
In-situ deposited prefabricated split-mounting type subway underground station construction method Download PDFInfo
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- CN106869172A CN106869172A CN201710213504.5A CN201710213504A CN106869172A CN 106869172 A CN106869172 A CN 106869172A CN 201710213504 A CN201710213504 A CN 201710213504A CN 106869172 A CN106869172 A CN 106869172A
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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
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Abstract
The invention discloses a kind of in-situ deposited prefabricated split-mounting type subway underground station construction method, in its foundation ditch constructed after the completion of excavation of subway foundation pit supporting, step one, the bottom that baseplate reinforcing bar is placed in foundation ditch, on the baseplate reinforcing bar correspondence bottom column and bottom side wall at be provided with dowel, after-pouring underplate concrete；The construction of step 2, bottom column and bottom side wall；Step 3, the construction of middle plate；Step 4, repeat step two and step 3, complete the superstructure construction of subway underground station, and the top board and the above to subway foundation pit carry out backfill earthing afterwards；Wherein, top board is that reinforcing bar is equipped with superimposed sheet, and top board, its two ends reserved steel bar on request.The present invention realizes the industrial streamlined production of subway underground station structure major part structure.
Description
Technical field
Technical field of construction is built the present invention relates to subway underground station.It is more particularly related to a kind of cast-in-place
Precast assembly combined type subway underground station construction method.
Background technology
The excavation method of subway underground station mainly includes cut and cover method, cap excavation method, shallow burial hidden digging.Various excavation methods
When the construction of subway underground station structure is related to, the structure such as side wall, column, base plate, middle plate, top board of station structure is often adopted
With live formwork supporting plate, poured in place concrete, job-cured side.This cast-in-place construction method has good integrity, rigidity
Greatly, the advantages of antidetonation impact is good.But exist for adaptation job site scheduling and green construction requirement apparent
Drawback.Substantial amounts of template, and the workload at scene is not only needed to beat, the duration is also more long.Cast-in-place wet trade will also result in environment
Water pollution, noise pollution and air pollution.Compared to traditional cast-in-place construction, the construction of precast assembly combined type then has compares
Obvious advantage.The component of subway underground station can be including middle plate, beam, side wall superimposed sheet, top board superimposed sheet and column etc.
Factory or precasting yard are first made, and are then installed at the construction field (site).Joint reinforcing bar is reserved while prefabricated, it is convenient follow-up
The cast-in-place connection in joint is carried out at the scene forms overall.Additionally, be that these prefabricated components are decorated in factory or precasting yard,
The engineering time can further be shortened.A large amount of templates can be saved using precast assembly combined type form of construction work, improve construction bar
Part is raised labour productivity, accelerating construction progress.The discharge capacity and noise pollution degree of building waste are also lower than traditional handicraft very
It is many, more conform to the requirement of the standard and green construction of modern architecture.And the precast assembly combination of subway underground station at present
Construction not yet finds application.Based on this, in-situ deposited prefabricated split-mounting type subway underground station construction method is proposed.
The content of the invention
It is an object of the invention to solve at least the above, and provide the advantage that at least will be described later.
It is real it is a still further object of the present invention to provide a kind of in-situ deposited prefabricated split-mounting type subway underground station construction method
The industrial streamlined production of subway underground station structure major part structure is showed.
In order to realize these purposes of the invention and further advantage, there is provided a kind of in-situ deposited prefabricated split-mounting type ground
In iron underground station construction method, its foundation ditch constructed after the completion of excavation of subway foundation pit supporting, comprise the following steps：
Step one, construction of bottom plates：Baseplate reinforcing bar is placed in the bottom of foundation ditch, on the baseplate reinforcing bar correspondence bottom column and
Be provided with dowel at bottom side wall, after-pouring underplate concrete, treat that underplate concrete intensity meets and require, remove bottom
Foundation ditch is supported；
The construction of step 2, bottom column and bottom side wall：
The reserved dowel of the upper end of prefabricated side wall superimposed sheet, lower end is provided with grout sleeve, and prefabricated side wall is folded
The inside wall of plywood is provided with side reinforcing bar, and the reserved dowel of upper end of prefabricated pile, lower end set grout sleeve；First will be prefabricated
The side reinforcing bar of side wall superimposed sheet is connected with corresponding base plate dowel, then erecting side wall superimposed sheet and prefabricated pile, specifically
For, respectively by the connection of the grout sleeve of prefabricated side wall superimposed sheet and prefabricated pile corresponding with base plate dowel, to junction and
Gap between prefabricated side wall superimposed sheet and foundation pit enclosure structure passes through grout sleeve casting concrete so that bottom column, bottom
Layer side wall, base plate and foundation pit enclosure structure form entirety, and conserve to intensity satisfaction requirement；
Step 3, the construction of middle plate：Prefabricated longeron is overlapped on bottom column, the reinforcing bar of contiguous prefabricated longeron termination is connected,
And pour the joint of prefabricated longeron, after joint concrete strength meets and requires, set up prefabricated middle plate, the prefabricated middle plate tool
The company for having the dowel of the dowel and contiguous prefabricated middle plate connection being connected with bottom side wall and being connected with last layer column
Connect muscle；To prefabricated middle plate and bottom side wall junction, contiguous prefabricated middle plate junction casting concrete, maintenance to intensity meets will
Ask, remove the foundation ditch support in middle level；
Step 4, repeat step two and step 3, complete the superstructure construction of subway underground station, afterwards iron-based over the ground
The top board and the above in hole carry out backfill earthing；Wherein, top board is that reinforcing bar is equipped with superimposed sheet, and top board, and its two ends is pressed will
Seek reserved steel bar.
Preferably, also including waterproof construction：
Before baseplate reinforcing bar erection, first laying water-proof coiled material covers the whole bottom surface of base plate, and waterproof roll both sides length
Degree is pre- to be left to the top for extending to side wall, and height of side wall includes the height of bottom side wall and upper strata side wall；
After baseplate reinforcing bar erection, the vertical pre-embedded steel slab sealing of length direction in base plate side wall and the junction of base plate
Band, pours underplate concrete again afterwards.
Preferably, the upper end of the bottom column and the upper end of bottom side wall are respectively provided with bracket.
Preferably,
Circular column leg, and circle are respectively and fixedly provided with the middle part of the middle part and prefabricated pile lower end of the prefabricated side wall superimposed sheet lower end
Post leg is slightly longer than grout sleeve, to support prefabricated side wall superimposed sheet and prefabricated pile.
Preferably, also including multiple support bars, Specific construction step is：
When prefabricated side wall superimposed sheet and the grout sleeve of prefabricated pile the dowel connection corresponding with base plate in step 2, and
After circular column leg supports prefabricated side wall superimposed sheet and prefabricated pile, the support bar is obliquely installed, and by fixture and prefabricated side wall
Superimposed sheet, prefabricated pile and base plate are fixed, and support bar is removed again after the completion of the construction of middle plate.
Preferably, when the position of plate in erection and top board runs into prop, the middle plate and top board with it is interim
The infall of pillar is reserved with gap, and in the reserved connection reinforcing bar of opening position, after after prop dismounting, connects adjacent middle plate and slit
Reinforcing bar and adjacent top board opening position connection reinforcing bar, and casting concrete are connected at mouthful.
Preferably, junction pours specifically, junction first is divided into inner ring and outer rings, inner ring is directly outer shroud
1~3 times of diameter, in inner ring formwork, and in inner ring casting concrete, after after inner ring concrete initial set, takes inner ring template away, it
Afterwards in outer shroud formwork, the first fiberglass gridding cloth is fixed in the circle of outer Monday of inner ring concrete, afterwards from outer shroud formwork to the
Second fiberglass gridding cloth of downward-sloping 30 °~60 ° of the direction setting ring-type of one fiberglass gridding cloth, and in outer shroud by
Multiple second fiberglass gridding cloths are up to arranged with, the spacing of adjacent second fiberglass gridding cloth is 8~10cm, afterwards
The casting concrete in outer shroud formwork.
The present invention at least includes following beneficial effect：
1st, the present invention is by in-situ deposited prefabricated assembling and construction method, has saved column, and middle plate underground station structure of awaiting a subway is mixed
The curing time of soil is coagulated, the superimposed sheet and prefabricated pile of this external wall can be decorated during prefabricated to its surface,
Avoid and individually fitted up on a large scale again after the completion of the structure construction of subway underground station, greatly save the finishing time, because
This present invention can significantly improve the build efficiency of subway underground station, accelerate construction speed, so reduce it is right
The time of road traffic influence；
2nd, the present invention relates to the prefabricated of component, when this construction method of use on a large scale, reduction duration, machine can be reached
Toolization substitutes manual site and constructs, and reduces the use of template, steel pipe, brings obvious economic benefit；
3rd, substantial amounts of use prefabricated components of the invention instead of original cast-in-place structural, reduce cast-in-place wet work, because
And many side walls are reduced, and the support shuttering of middle plate etc., common noise, dust, wood chip etc. are largely reduced in subway work, ground
Construction space and construction environment in iron underground station are greatly improved；
4th, the substantial amounts of prefabricated components employed in precasting yard production of the present invention, prefabricated components are in factory or precasting yard
Unified in mechanical streamline to produce manufacture, control accuracy is high, has better quality compared to cast-in-place structural.In addition prefabricated components
Harmful effect by season is small, therefore the present invention can on the whole lift subway underground station structure construction quality.
Construction method of the invention realizes the industrial streamlined production of subway underground station structure (middle plate, column etc.),
Sectional, is combined, energy-saving and emission-reduction with national industrial policies so that subway underground station architecture quality has preferably guarantee,
Adapt to live rapid assembling combination construction.Due to using prefabricated component, prefabrication and site operation can synchronously carry out,
Particularly factory greatly shortens curing period, is obviously improved construction speed, shortens the duration, reduces the influence of road pavement traffic.Simultaneously
Due to the prefabricated quality that can ensure component, this safe and reliable economy of invention, construction risk is small.
Further advantage of the invention, target and feature embody part by following explanation, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Brief description of the drawings
Fig. 1 is the structural representation of foundation ditch after the completion of excavation of subway foundation pit supporting of the present invention；
Fig. 2 is construction of bottom plates schematic diagram of the present invention；
Fig. 3 is bottom column of the present invention and bottom side wall construction schematic diagram；
Fig. 4 is the structural representation of support bar temporary support of the present invention；
Fig. 5 for the present invention in grillage set schematic diagram；
Fig. 6 is that plate pours the schematic diagram being connected with bottom column and bottom side wall in the present invention；
Fig. 7 is upper strata column of the present invention and upper strata side wall construction schematic diagram；
Fig. 8 is that upper strata column of the present invention and upper strata side wall complete the schematic diagram after pouring；
Fig. 9 is top board beam of the present invention, the schematic diagram of template erection；
Figure 10 pours top board for the present invention, and the schematic diagram of the foundation ditch support of top layer is removed afterwards；
Figure 11 is the structural representation of the subway underground station after present invention backfill earthing；
Figure 12 is the structural representation of subway underground station construction at prop；
Figure 13 is the longitudinal spliced schematic diagram of the middle plate with gap；
Figure 14 is adjacent middle plate opening position connection bar connecting and completes the structural representation after pouring.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
In the description of the invention, term " transverse direction ", " longitudinal direction ", " on ", it is D score, "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " top ", " bottom ", " interior ", " outward " are based on orientation shown in the drawings or position
Relation is put, the description present invention is for only for ease of and is simplified description, be not to indicate or imply that the device or element of meaning are necessary
With specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
Such as Fig. 1-11, the present invention provides a kind of in-situ deposited prefabricated split-mounting type subway underground station construction method, such as Fig. 1 institutes
Show, in its foundation ditch constructed after the completion of excavation of subway foundation pit supporting, foundation ditch includes armored concrete Guan Liang 1, enclosure wall 2, branch
The foundation ditch support 4 of the foundation ditch support 5, middle level with bottom from the bottom to top and the foundation ditch support of top layer in foundation ditch after the completion of shield
3；
Construction method is comprised the following steps：
As shown in Fig. 2 step one, base plate 7 are constructed：Foundation ditch will be placed according to construction requirement and the baseplate reinforcing bar of specification colligation
Bottom, on the baseplate reinforcing bar according to detailing requiments correspondence bottom column and bottom side wall at be provided with dowel 6, pour afterwards
Underplate concrete is built, is treated that underplate concrete intensity meets and is required, remove the foundation ditch support of bottom, due in the technical program, side
Wall uses prefabricated+cast-in-place form, therefore to the fixing by gross bearings of the dowel of correspondence side wall on base plate compared to directly having used
Complete prefabricated side wall precision prescribed is low, reduces difficulty of construction, is needed between base plate and prefabricated side wall in the prior art
Side is set and leads wall connection, while the construction error requirement control of dowel in wall is led within ± 4mm, and the application, due to side
Wall is cast-in-place using superimposed sheet and part, can be adjusted according to actual dowel location-appropriate, therefore construction error requirement control
Within ± 10mm, the engineering time is saved on the contrary compared to prior art.Pre- embedded reinforcing bar conduct in prefabricated superimposed sheet
Follow-up side reinforcing bar, on the other hand can improve the bending resistance shearing strength of superimposed sheet up to more than 300%, therefore superimposed sheet is from intensity
Meet as the condition of side wall template；The construction method of cast-in-place+prefabricated side wall, only needs prefabricated to side wall folded in work progress
Plywood is lifted, positioned and fixed temporarily, relatively whole precast wall body.The prefabricated superimposed sheet scale of construction is smaller, and loop wheel machine is hung
Dress Capability Requirement can reduce up to 50% or so；Simultaneously as the relatively complete prefabricated side wall light about 80% or so of quality, prefabricated overlapping
Requirement of the plate to temporary support intensity and quantity is much lower, can totally reduce by about 80% temporary support component；Using it is prefabricated+
Cast-in-place construction scheme, waterproof roll can be laid in wall in advance, after carry out it is cast-in-place, by waterproof roll imbed side wall in, can protect
Shield waterproof roll damage.
In addition, side wall is using cast-in-place+prefabricated：Prefabricated superimposed sheet therein can replace the effect of template, it is to avoid construction is existing
The extensive formwork in field.And cast-in-place concrete in side wall with the joint of middle plate etc. is also inevitable in itself, therefore side wall is used
Part is cast-in-place not to result in extra equipment increase etc..
As shown in Figure 3-4, step 2, bottom column and bottom side wall construction：The upper end of prefabricated side wall superimposed sheet 8 is reserved
Dowel, lower end is provided with grout sleeve, and the inside wall of prefabricated side wall superimposed sheet (is close to the one of foundation pit enclosure structure
Face) it is provided with side reinforcing bar and prefabricated side wall superimposed sheet is extended in lower end, (axial bearing capacity of prefabricated pile is more live existing for prefabricated pile 10
Post is poured to improve up to more than 20%) the reserved dowel of upper end, lower end grout sleeve is set；First by prefabricated side wall superimposed sheet
Side reinforcing bar connected with corresponding base plate dowel, can for example be connected by screw shell, then erecting side wall overlapping
Plate and prefabricated pile, specifically, respectively connecting the grout sleeve of prefabricated side wall superimposed sheet and prefabricated pile dowel corresponding with base plate
Connect, to the gap between junction and prefabricated side wall superimposed sheet and foundation pit enclosure structure by grout sleeve casting concrete,
So that bottom column, bottom side wall 11, base plate and foundation pit enclosure structure form entirety, and conserve to intensity satisfaction requirement；Its
In, template consumption is saved as a face of template using enclosure wall 2 when prefabricated side wall superimposed sheet is poured, 12 is existing in figure
Pour post plate joint.
As seen in figs. 5-6, step 3, the construction of middle plate：(prefabricated stringer designs are up big and down small ladder to overlap prefabricated longeron 14
Shape structure) on bottom column, the reinforcing bar of contiguous prefabricated longeron termination is connected, and the joint of prefabricated longeron is poured, treat joint
After concrete strength meets requirement, prefabricated middle plate 13 is set up afterwards, the prefabricated middle plate has the connection being connected with bottom side wall
Muscle and the dowel and the dowel with the connection of upper strata column of contiguous prefabricated middle plate connection；To prefabricated middle plate and bottom side wall
Junction, contiguous prefabricated middle plate junction casting concrete, maintenance to intensity meet requirement, remove the foundation ditch support in middle level.
In above-mentioned technical proposal, middle plate is in subway station as a load-carrying member, precast concrete steady quality, whole
Life cycle effect on environment is minimum；The making quality of prefabricated board is secure, and its bending resistance is improved compared with condition of equivalent thickness Bars In Poured Concrete Slab
More than 20%.Therefore, under the premise of equal bearing capacity is met, it is relatively more thinner that prefabricated board can make.
As Figure 7-8, step 4, upper strata column and upper strata side wall construction：Upper layer side wall superimposed sheet is set up using loop wheel machine
And the prefabricated pile on upper strata, the reserved dowel of upper end of same upper strata side wall superimposed sheet, lower end is provided with grout sleeve,
And the inside wall of upper strata side wall superimposed sheet is provided with side reinforcing bar；The upper end of the prefabricated pile on upper strata reserved dowel, lower end
Grout sleeve is set；Prefabricated pile is same can be repaiied in construction advance luggage, to save the duration.Afterwards with step 2 in erection
Connected mode is identical, and with each junction of plate in concreting upper strata side wall and subway station structure.
As shown in figure 9, step 5, the erection prefabricated longeron of top layer are on the column of upper strata, the upper end of prefabricated longeron is wider, is easy to
Follow-up top layer template is set up, and connects the reinforcing bar of contiguous prefabricated longeron termination, and pours the joint of prefabricated longeron, treats that joint is mixed
After solidifying soil intensity meets and requires, top board 15 is set up afterwards, the same step 3 of erection mode different from middle plate is herein that top board is folded
Plywood, is equipped with reinforcing bar in top board superimposed sheet, superimposed sheet two ends reserved steel bar on request.
As shown in figs. 10-11, step 6, pour joint at subway underground station top board structure and top board, maintenance is extremely
Concrete roof intensity reaches requirement, forms casting top slab 16.After treating that intensity reaches requirement, the foundation ditch support of top layer is removed.
Step 7, the superstructure construction for completing subway underground station, the top board and the above to subway foundation pit are carried out afterwards
Backfill earthing 17, you can recover traffic above-ground.
In another technical scheme, also including waterproof construction：
Before baseplate reinforcing bar erection, first laying water-proof coiled material covers the whole bottom surface of base plate, and waterproof roll both sides length
Degree is pre- to be left to the top for extending to side wall, and height of side wall includes the height of bottom side wall and upper strata side wall, it is necessary to explanation is anti-
The length of water coiled material not enough extends to side wall from base plate, accordingly, it would be desirable to multiple waterproof roll splicings.
After baseplate reinforcing bar erection, the vertical pre-embedded steel slab sealing of length direction in base plate side wall and the junction of base plate
Band, pours underplate concrete again afterwards.
In the above-mentioned technical solutions, for compared to station construction under existing subway, the construction of fertile groove, one are reduced
As the construction of fertile groove be that the later stage is still with element in order to carry out waterproof construction and fix prefabricated side wall temporarily in building enclosure
Concrete backfill, not only increases construction cost and extends the duration, and the width of general fertilizer groove is suitable with lateral wall width, is
0.8~1m, the foundation ditch both sides of subway underground station will reserve fertile groove, therefore width will at least increase in excavation pit
1.6m, again increases excavation cost and difficulty of construction.Used using cast-in-place+prefabricated side wall concrete that can be saved by about one time
Amount；Meanwhile, the presence of fertile groove increases the width of excavation of foundation pit, in the strict urban district of effect on environment requirement, has its certain
Limitation.Cast-in-place+prefabricated construction subway station side wall can evade this problem, reduce excavation of foundation pit to the shadow that around settles
Ring.
In another technical scheme, the upper end of the bottom column and the upper end of bottom side wall are respectively provided with bracket,
Herein, the bracket framework of prefabricated side wall superimposed sheet is arranged on its top, after final side wall superimposed sheet completes to pour, the top of formation
Area is big, is similar to up big and down small trapezoidal bracket；The bracket that same prefabricated pile top is set is directly upper big for what is poured
Under small trapezium structure, inside has reinforcing bar, sets bracket and be for facilitating setting up for prefabricated longeron.
In another technical scheme, the middle part of the prefabricated side wall superimposed sheet lower end and the middle part of prefabricated pile lower end
Circular column leg is respectively and fixedly provided with, and circular column leg is slightly longer than grout sleeve, to support prefabricated side wall superimposed sheet and prefabricated pile.
In the above-mentioned technical solutions, connecting temporarily between prefabricated side wall superimposed sheet and building enclosure (ground-connecting-wall) is eliminated
Connect, directly poured to be integrated afterwards and save the engineering time as a part for support by circular column leg.
In another technical scheme, also including multiple support bars, Specific construction step is：
When prefabricated side wall superimposed sheet and the grout sleeve of prefabricated pile the dowel connection corresponding with base plate in step 2, and
After circular column leg supports prefabricated side wall superimposed sheet and prefabricated pile, the support bar 9 is obliquely installed, and by fixture and prefabricated side wall
Superimposed sheet, prefabricated pile and base plate are fixed, and support bar is removed again after the completion of the construction of middle plate.
In the above-mentioned technical solutions, support bar set-up mode such as Fig. 4, support bar by fixture two ends respectively with prefabricated side
Wall superimposed sheet and base plate are fixed, likewise, many support bars prop up bottom column from both sides, what is more optimized ensure that bottom side
Wall and bottom column it is spacing, prevent from inclining.
Temporary support (support bar) is used to be supported side wall superimposed sheet with this construction method, it is convenient and swift.Avoid
Temporary support load is delivered in building enclosure, in case producing hidden danger to the general safety of building enclosure；Temporary support, with pre-
The component being embedded on prefabricated component and plate is consolidated.Temporary support stress, power transmission are rationally simple.
Such as Figure 12-14, in another technical scheme, it is necessary to explanation be from left to right horizontal in Fig. 1~Figure 12
To, it is from front to back longitudinal direction, when the position of plate in erection and top board runs into prop 18, (prop is typically all to tear open
Removed again after supporting 3 except the foundation ditch of top layer), the middle plate and top board are reserved with gap, gap with the infall of prop
Positioned at the side of middle plate and top board longitudinal direction, an entirety is spliced into along the upper two middle plates 13 in longitudinal direction or two gap of top board 20,
Passed through for prop, and connection reinforcing bar 19 is reserved on the side of gap longitudinal direction, after after prop dismounting, connects adjacent middle plate gap
Place's connection reinforcing bar and adjacent top board opening position connection reinforcing bar, and casting concrete.
In another technical scheme, junction pours specifically, junction first is divided into inner ring and outer rings, inner ring
It is directly 1~3 times of outer annular diameter, in inner ring formwork, and in inner ring casting concrete, after after inner ring concrete initial set, takes away
Inner ring template, afterwards in outer shroud formwork, fixes the first fiberglass gridding cloth, afterwards by outer in the circle of outer Monday of inner ring concrete
Ring formwork sets the second fiberglass gridding cloth of ring-type to downward-sloping 30 °~60 ° of the direction of the first fiberglass gridding cloth,
And multiple second fiberglass gridding cloths are from top to bottom provided with outer shroud, the spacing of adjacent second fiberglass gridding cloth is 8
~10cm, the afterwards casting concrete in outer shroud formwork.
After being poured due to existing junction, easily there is crackle in the later stage, for this problem, in the technical program, leads to
Cross it is secondary pour and the first fiberglass gridding cloth be set and the second fiberglass gridding cloth, junction can be significantly improved
Anti-crack ability, improves construction quality.Compare through overtesting, a direct formwork pours junction, and its factor of safety against cracking is
Infiltration grade resistant to pressure is less than P12 more than P8 within 1.27, the 28th day, and formwork is poured and sets glass fibre twice using this method
Grid cloth, its factor of safety against cracking is 1.48, and the 28th day infiltration grade resistant to pressure is more than P12.
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in specification and implementation method
With, it can be applied to various suitable the field of the invention completely, for those skilled in the art, can be easily
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the legend with description.
Claims (7)
1. a kind of in-situ deposited prefabricated split-mounting type subway underground station construction method, it is constructed and is completed in excavation of subway foundation pit supporting
In foundation ditch afterwards, it is characterised in that comprise the following steps：
Step one, construction of bottom plates：Baseplate reinforcing bar is placed in the bottom of foundation ditch, correspondence bottom column and bottom on the baseplate reinforcing bar
Dowel is provided with side wall, after-pouring underplate concrete, treat underplate concrete intensity meet require, remove bottom foundation ditch
Support；
The construction of step 2, bottom column and bottom side wall：
The reserved dowel of the upper end of prefabricated side wall superimposed sheet, lower end is provided with grout sleeve, and prefabricated side wall superimposed sheet
Inside wall be provided with side reinforcing bar, the reserved dowel of upper end of prefabricated pile, lower end set grout sleeve；First by prefabricated side wall
The side reinforcing bar of superimposed sheet is connected with corresponding base plate dowel, then erecting side wall superimposed sheet and prefabricated pile, specifically, point
Not by the connection of the grout sleeve of prefabricated side wall superimposed sheet and prefabricated pile corresponding with base plate dowel, to junction and prefabricated
Gap between side wall superimposed sheet and foundation pit enclosure structure passes through grout sleeve casting concrete so that bottom column, bottom side
Wall, base plate and foundation pit enclosure structure form entirety, and conserve to intensity satisfaction requirement；
Step 3, the construction of middle plate：Prefabricated longeron is overlapped on bottom column, the reinforcing bar of contiguous prefabricated longeron termination is connected, and pour
Build the joint of prefabricated longeron, after joint concrete strength meets and requires, set up prefabricated middle plate, the prefabricated middle plate have with
The dowel of bottom side wall connection and the dowel and the dowel with the connection of last layer column of contiguous prefabricated middle plate connection；
To prefabricated middle plate and bottom side wall junction, contiguous prefabricated middle plate junction casting concrete, maintenance to intensity meets requirement, tears open
Except the foundation ditch in middle level is supported；
Step 4, repeat step two and step 3, complete the superstructure construction of subway underground station, afterwards to subway foundation pit
Top board and the above carry out backfill earthing；Wherein, top board is that reinforcing bar is equipped with superimposed sheet, and top board, and its two ends is pre- on request
Stay reinforcing bar.
2. in-situ deposited prefabricated split-mounting type subway underground station construction method as claimed in claim 1, it is characterised in that also wrap
Include waterproof construction：
Before baseplate reinforcing bar erection, first laying water-proof coiled material covers the whole bottom surface of base plate, and the length of waterproof roll both sides is pre-
The top for extending to side wall is left to, height of side wall includes the height of bottom side wall and upper strata side wall；
After baseplate reinforcing bar erection, the vertical pre-embedded steel slab waterstop of length direction in base plate side wall and the junction of base plate, it
Pour underplate concrete again afterwards.
3. in-situ deposited prefabricated split-mounting type subway underground station construction method as claimed in claim 1, it is characterised in that described
The upper end of bottom column and the upper end of bottom side wall are respectively provided with bracket.
4. in-situ deposited prefabricated split-mounting type subway underground station construction method as claimed in claim 1, it is characterised in that
Circular column leg, and circular column leg are respectively and fixedly provided with the middle part of the middle part and prefabricated pile lower end of the prefabricated side wall superimposed sheet lower end
Grout sleeve is slightly longer than, to support prefabricated side wall superimposed sheet and prefabricated pile.
5. in-situ deposited prefabricated split-mounting type subway underground station construction method as claimed in claim 4, it is characterised in that also wrap
Multiple support bars are included, Specific construction step is：
When prefabricated side wall superimposed sheet and the grout sleeve of prefabricated pile the dowel connection corresponding with base plate in step 2, and cylinder
After leg supports prefabricated side wall superimposed sheet and prefabricated pile, the support bar is obliquely installed, and is overlapped with prefabricated side wall by fixture
Plate, prefabricated pile and base plate are fixed, and support bar is removed again after the completion of the construction of middle plate.
6. in-situ deposited prefabricated split-mounting type subway underground station construction method as claimed in claim 1, it is characterised in that work as frame
If the position of middle plate and top board runs into prop, the middle plate and top board are reserved with open-minded with the infall of prop
Mouthful, and in the reserved connection reinforcing bar of opening position, after after prop dismounting, connecting adjacent middle plate opening position connection reinforcing bar and adjacent
Top board opening position connects reinforcing bar, and casting concrete.
7. in-situ deposited prefabricated split-mounting type subway underground station construction method as claimed in claim 1, it is characterised in that connection
Place is poured specifically, junction first is divided into inner ring and outer rings, inner ring is directly 1~3 times of outer annular diameter, in inner ring branch
Mould, and in inner ring casting concrete, after after inner ring concrete initial set, take inner ring template away, it is mixed in inner ring afterwards in outer shroud formwork
Coagulate soil outer Monday circle fix the first fiberglass gridding cloth, afterwards from direction from outer shroud formwork to the first fiberglass gridding cloth
Downward-sloping 30 °~60 ° the second fiberglass gridding cloths of setting ring-type, and from top to bottom it is provided with multiple second glass in outer shroud
Glass fibrous mesh cloth, the spacing of adjacent second fiberglass gridding cloth is 8~10cm, pours coagulation in outer shroud formwork afterwards
Soil.
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| CN201710213504.5A CN106869172B (en) | 2017-04-01 | 2017-04-01 | In-situ deposited prefabricated split-mounting type subway underground station construction method |
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| CN201710213504.5A CN106869172B (en) | 2017-04-01 | 2017-04-01 | In-situ deposited prefabricated split-mounting type subway underground station construction method |
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| CN110318426B (en) * | 2019-08-07 | 2024-01-09 | 哈尔滨工业大学 | Assembled steel-concrete mixed structure subway station and assembling method |
| CN110512647B (en) * | 2019-08-28 | 2021-06-25 | 北京工业大学 | Partial assembly type subway station structure design and construction method |
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| CN111074941A (en) * | 2019-12-31 | 2020-04-28 | 中车建设工程有限公司 | Large-span composite structural underground station and construction method thereof |
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| CN111364509A (en) * | 2020-03-24 | 2020-07-03 | 石家庄铁源工程咨询有限公司 | Construction method for underground space below existing road |
| CN111519824A (en) * | 2020-04-14 | 2020-08-11 | 中铁第四勘察设计院集团有限公司 | Prefabricated station platen, assembly type station and construction method of assembly type station |
| CN113006133B (en) * | 2021-01-29 | 2022-10-14 | 广州地铁设计研究院股份有限公司 | Construction method of middle plate hole suitable for assembly type station |
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