CN107542108B - A kind of reverse construction method of building basement structure - Google Patents

A kind of reverse construction method of building basement structure Download PDF

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Publication number
CN107542108B
CN107542108B CN201611198350.9A CN201611198350A CN107542108B CN 107542108 B CN107542108 B CN 107542108B CN 201611198350 A CN201611198350 A CN 201611198350A CN 107542108 B CN107542108 B CN 107542108B
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construction
basement
pillar
excavation
layer
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CN107542108A (en
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王立军
祝浩
周新科
廖俊侨
雷勇军
沈俊川
祁永平
龙平
廖斌
陈焕旭
刘昆
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Shenzhen Jianye Engineering Group Co Ltd
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Shenzhen Jianye Engineering Group Co Ltd
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Abstract

A kind of reverse construction method of building basement structure, solve the problems, such as land subsidence around foundation pit, road, building, the difficulty of underground utilities deformation dislocation and excavation of foundation pit subsequent construction, after the engineering method in earlier molding pile hole using underground structure pile is poured, it is realized in the method for carrying out underground structure part adverse construction method, the construction method is realized by following steps: the pile hole construction of basement structure is carried out on 1 ground, pile hole is divided into basement space size stake holes part below and passes through the post holes part of basement space size.2. stake concreting.3. pillar concreting.4. basement negative one layer structure excavation of earthwork is removed.5. basement negative one layer exterior wall concrete structure construction.6. structure construction is removed in basement negative one layer excavation of earthwork.7. construction is removed in the minus two layers of excavation of earthwork of basement.8. minus two layers of the crossbeam of basement, floor construction are constructed.Beneficial effect is that construction method is simple, high-efficient, at low cost.

Description

A kind of reverse construction method of building basement structure
A kind of reverse construction method of building basement structure
Technical field
The present invention relates to a kind of construction techniques, especially a kind of reverse construction method of building basement structure.
Background technique
Since reform and opening-up, domestic city construction scale constantly expands, and building density and height also increase therewith, Deep, Large Foundation Pit has been generally used with the increase of building density and height.The prior art is being applied using first excavation foundation pit The method of work, but being continuously increased with cutting depth, the cone of depression influence area range that precipitation is formed also constantly expands, right The influence of existing building is also increasing around foundation pit, the prior art cause land subsidence around foundation pit, road, building, The difficulty of underground pipelines deformation dislocation and excavation of foundation pit subsequent construction.
Goal of the invention
To solve land subsidence around above-mentioned foundation pit, road, building, underground utilities deformation dislocation and excavation of foundation pit is subsequent applies The difficult problem of work, the present invention disclose a kind of reverse construction method of building basement structure, build for Around Object is intensive, the area of underground utilities complexity, makees integrated construction using inverse in underground structure part, obtains better effects.
The method that the present invention realizes that goal of the invention uses is:
A kind of reverse construction method of building basement structure, which uses pours in earlier molding pile hole After underground structure pile, then the method for carrying out underground structure part adverse construction method is realized, the construction method is by following steps reality It is existing:
The pile hole construction of basement structure is carried out on step 1. ground, and retaining wall processing is carried out to the pile hole of formation, In the construction of pile hole, pile hole is divided into basement space size stake holes part below and passes through the post holes of basement space size Part, the column for being greater than 0.8-1.2 meters of pillar overall size for passing through the aperture size of post holes part of basement space size Sub- construction space.
Step 2. stake concreting: stake steel reinforcement cage is fitted in place in stake holes partial hole, is poured after multiple line is errorless Build inner concrete, at stake concreting to pillar joint bar anchored end bottom absolute altitude, the secondary filling after the binding installation of column joint bar Stake concrete is infused to designed elevation;
Step 3. pillar concreting:
Pillar reinforcing bar is tied up, the binding of column tie-bar is carried out in the post holes of post holes part and is pressed when the binding of pillar reinforcing bar is installed The horizontal embedded ribs of fixed underground room exterior wall and pillar hoop shearing resistance embedded ribs are installed according to underground floor absolute altitude and design position;
Fixed post template is installed, the installation of post template is fixed, by stencil design requirement in the post holes of post holes part It carries out from bottom to top;
Pillar concrete is poured to pillar designed elevation in the fixed post template of installation;
Step 4. basement negative one layer structure excavation of earthwork is removed;
After the completion of stake concrete and pillar concreting, using mechanical and artificial combination to basement negative one layer Structure excavation of earthwork is removed, and is excavated and is carried out Demolition Construction to the post template of negative one layer after removing.
Step 5. basement negative one layer exterior wall concrete structure construction;
It should be inserted into external wall construction in time in basement negative one layer structure excavation of earthwork reset procedure, each construction height is answered It is determined depending on periphery soil body situation scene by design specification, when exterior wall horizontal reinforcement is constructed using the method and pillar of single-selded lap joint Reserving rib welding, when upper section Retaining wall, should reserve vertical bar and connect with lower section vertical bar, horizontal steel plate for sealing water is arranged or waterproof is recessed Slot;
Step 6. basement structure construction;
After the completion of basement negative one layer excavation of earthwork is removed, according to substrate soil property situation casting concrete bed course, bed course is thick Degree should meet rigidity requirement, prevent basement negative one layer roof plate template from sinking, bed course absolute altitude should be with the minus two floors board bottom of basement Absolute altitude is consistent, and crossbeam, floor construction shuttering supporting bottom of upright rod should add backing plate, prevents bed course part differential settlement, carries out Basement negative one layer crossbeam, floor construction concreting;
Construction is removed in the minus two layers of excavation of earthwork of step 7. basement;
After basement negative one layer crossbeam, floor construction concrete reach the strength of mould stripping of code requirement, support frame is removed Body carries out the excavation of earthwork of two layers of underground and removes, and the excavation of earthwork removing of two layers of underground is tunneling, using the stage excavation earthwork, often Thickness degree is less than 1 meter, and the foundation pit side of earth excavation and exterior wall back gauge are not less than 2 meters, and grade of side slope should be full according to soil property situation The slope requirement of sufficient natural discharging slope pours minus two according to substrate soil property situation after the completion of the minus two layers of excavation of earthwork of basement is removed Layer concrete bed course;
Minus two layers of the crossbeam of step 8. basement, floor construction construction;
The negative two-layer structure crossbeam of basement, floor slab construction are carried out on the minus two layer concretes bed course of basement, due to underground Room pillar is constructed in advance, and each layer crossbeam in underground, floor successively pour from top to bottom with soil excavation progress, by reserving on column Frictional force receiving basement floor live load and self weight between shear reinforcement and ring beam and pillar, the crossbeam of every layer of basement, Synchronous construction is answered in floor construction concreting.
The invention has the advantages that construction method is simple, high-efficient, at low cost, can solve ground around foundation pit Depression, road, building, underground utilities deformation misplaces and the technical problems such as the difficulty of excavation of foundation pit subsequent construction.This construction Be primarily adapted for use in engineering pile be caisson geology location, close to buildings and ambient enviroment it is sensitive to sedimentation and deformation, construction work The Large Underground Structure engineering that phase is nervous, construction site is narrow, surrounding buildings density is big.
The present invention is described in detail with reference to the accompanying drawing.
Attached drawing 1 is construction flow chart of the present invention.
Specific embodiment:
The technological principle that the present invention constructs are as follows: the construction method of multi-storey basement of the present invention is a kind of " closed " construction party Method.Its technological principle is that the construction of pile hole is excavated in the ground earthwork, and in the construction of pile hole, pile hole is divided into basement space ruler Very little stake holes part below and the post holes part for passing through basement space size, for passing through the post holes portion of basement space size Point aperture size be greater than 0.8-1.2 meters of pillar overall size of pillar construction space, inner concrete pour after in stake holes Implement the pillar of underground structure, the horizontal reinforcement of reserved beam shear reinforcement and wall is needed in pillar work progress.Then negative one is carried out Layer earth excavation, it is inverse in digging process to pour the progress supporting of barricade side slope.First floor crossbeam, floor construction are poured again, are utilized It is as the horizontally-supported of underground structure.Underground Construction is according to said method successively completed from top to bottom, until structure back cover.
The construction method is realized by following steps:
The pile hole construction of basement structure is carried out on step 1. ground, and retaining wall processing is carried out to the pile hole of formation, In the construction of pile hole, pile hole is divided into basement space size stake holes part below and passes through the post holes of basement space size Part, the column for being greater than 0.8-1.2 meters of pillar overall size for passing through the aperture size of post holes part of basement space size Sub- construction space.
Pile hole is constructed outside in strict accordance with pertinent regulation, standard construction, the technical measures for use of constructing are as follows:
In the construction of pile hole, reinforced concrete core-tube, the aperture size for passing through the post holes part of basement space size is big In 0.8-1.2 meters of pillar overall size, enlarged diameter is dimensioned to meet pillar construction operation, most preferably takes 800~1000mm For benefit, the bottom absolute altitude for expanding stake holes is lower than 30~50mm of bottom end of pillar bottom joint bar.
When drift sand situation is lighter, shorten the cutting depth of this circulation to 0.5m, when reducing the exposure for digging layer hole wall Between, breast wall concrete perfusion is carried out in time, when pile hole wall slump, when having silt flow into without that can form pile hole, can use spinning Knitting bag, gradually heap is stifled, forms the outer wall in pile hole, and control and guarantee that inner wall meets design requirement.
When quicksand is more serious, it is straight with hole outer diameter that with the method for lower steel bushing, steel bushing is similar to the punching block of retaining wall Diameter can be divided into 4~6 sections of circular arcs, adds rib appropriate, is mutually connected with bolt or reinforcing bar latch closure, excavate 0.5m or so, Can fragment sleeve is packed into, go deep into bottom hole and be no less than 0.2m, insertion top concrete guard wall outside portion is less than 0.5m, after dress i.e. Formwork is poured breast wall concrete, if be put into after sleeve quicksand still on gush, use concrete enclosing bottom hole after prominent dig out can be taken Method, after concrete coagulation, by the clear scalpriform pile post holes of the concrete of hole center portion position.
Step 2. stake concreting: stake steel reinforcement cage is fitted in place in stake holes partial hole, is poured after multiple line is errorless Build inner concrete, at stake concreting to pillar joint bar anchored end bottom absolute altitude, the secondary filling after the binding installation of column joint bar Stake concrete is infused to designed elevation.
Stake concreting:
It is in place using tower crane or crane installation after stake fabrication of reinforcing cage is good, the errorless after-pouring inner concrete of multiple line, stake At sub- concreting to column joint bar anchored end bottom absolute altitude, secondary pouring stake concrete is to setting after the binding installation of pillar joint bar Count absolute altitude.
Step 3. pillar concreting:
Pillar reinforcing bar is tied up, the binding of column tie-bar is carried out in the post holes of post holes part and is pressed when the binding of pillar reinforcing bar is installed The horizontal embedded ribs of fixed underground room exterior wall and pillar hoop shearing resistance embedded ribs are installed according to underground floor absolute altitude and design position.
Fixed post template is installed, the installation of post template is fixed, by stencil design requirement in the post holes of post holes part It carries out from bottom to top;
Pillar concrete is poured to pillar designed elevation in the fixed post template of installation.
Basement structure pillar concrete is poured in stake holes
Axis side is put in a walling crib, and carries out paint marks;Axis is fallen on the concrete of stake top again, in stake Pillar is put on the concrete of top and goes out joint bar position, binds column joint bar, steel pipe frame positioning;Column joint bar concrete is poured using automotive pump, Concreting is high to design base top mark.
Pillar main reinforcement and joint bar use straight screw connection, first set up steel pipe lantern stand, make the positioning of pillar reinforcing bar, guarantee reinforcing bar Plan-position and verticality.Bar bender carries out the binding of column tie-bar in pillar hole.Since operating space is limited in hole, pillar Stirrup can only entangle pillar main reinforcement from top, be fastened with rope, slide into lower part, bind column tie-bar from the bottom up.Pillar reinforcing bar is tied up When pricking installation, the horizontal embedded ribs of fixed underground room exterior wall are installed according to underground floor absolute altitude and design position and pillar hoop shearing resistance is pre- Bury muscle.
Post template fabrication and installation.Detailed template assembly figure was drawn out before making template and production drawing is used to Instruct the production and installment work of template.After template construct, template is hung in hole in place using crane or tower crane.Pillar Template is reinforced using steel pipe tie+jacking.The spacing of steel pipe column hoop, generally 400- are calculated according to pillar size and height 1000mm;Jacking quantity is arranged by pillar cross-sectional width, with steel pipe support on pile concrete retaining wall after jacking.Tie installation is answered It is carried out from bottom to top by stencil design requirement, 200mm is started setting up in pouring concrete stake.Post template after the installation is completed, The verticality of template should be checked comprehensively, diagonal line length is poor, the projects such as sectional dimension, support must securely, built-in fitting, reservation member, Reserving hole forbids leakage to set, it is necessary to accurate, firm.
Pillar concreting.The watering of reply template is wet before pouring, and the cleanout of column template should remove sundries and product It is re-closed after water.Quick-fried mould is forbidden in pillar concreting, carpenter should be arranged to keep mould when pouring, and situation such as occurs and handles in time. If pillar height is greater than 2 meters, concreting should use tumbling barrel or conduit.
Step 4. basement negative one layer structure excavation of earthwork is removed;
After the completion of stake concrete and pillar concreting, using mechanical and artificial combination to basement negative one layer Structure excavation of earthwork is removed, and is excavated and is carried out Demolition Construction to the post template of negative one layer after removing.
This layer of earthwork is that open type excavates removing, carries out excavation removing using excavator, dump truck transports over-the-counter spoil ground. Rainy day construct when and soft foundation earthwork transportation road, making slabstone is answered, when necessary place mat thick steel plate, to guarantee that the earthwork is normal Transport.Temporary road specifically moves towards determining according to on-site actual situations, and width should meet the requirement of earthwork transportation.Excavation of earthwork is clear Stop excavating when except 300mm above to designed elevation, using hand excavation to designed elevation.Grade of side slope should be according to soil property feelings Condition meets the slope requirement of natural discharging slope.
The reinforced concrete core-tube poured when former construction stake post holes is cut in earth excavation using rock drill, using useless Old template carries out package protection to pillar, causes to damage to pillar during preventing retaining wall from abolishing.
External wall construction should be inserted into time in excavation of earthwork reset procedure, it is existing that each construction height should regard periphery soil body situation Field determines (generally mono- section of 1.5m).Reserving rib welds when exterior wall horizontal reinforcement is constructed using the method and former pillar of single-selded lap joint It connects.Outer wall template is single-side support system.Scaffold support, template install firm supporting, must not be loosened, run mould, sinking etc. Phenomenon.It should ensure that DESIGN OF RETAINING WALLS shape, size and location are accurate, and easy to disassemble.Since the second section barricade, template should be propped up If angle is convenient for concreting, concreting is higher by barricade top 10-20cm, guarantees that concrete pours to template angle top Build quality.After template to be removed, angle concrete is manually cut.
When upper section Retaining wall, vertical bar should be reserved and connect with lower section vertical bar, horizontal steel plate for sealing water or waterproof groove are set.Gear After wall is constructed, if there is infiltration phenomenon, infiltration can be dredged in seepage part drilling setting drainage hole and drainpipe.
Step 5. basement negative one layer exterior wall concrete structure construction;
It should be inserted into external wall construction in time in basement negative one layer structure excavation of earthwork reset procedure, each construction height is answered It is determined depending on periphery soil body situation scene by design specification, when exterior wall horizontal reinforcement is constructed using the method and pillar of single-selded lap joint Reserving rib welding, when upper section Retaining wall, should reserve vertical bar and connect with lower section vertical bar, horizontal steel plate for sealing water is arranged or waterproof is recessed Slot.
Step 6. basement structure construction;
After the completion of basement negative one layer excavation of earthwork is removed, according to substrate soil property situation casting concrete bed course, bed course is thick Degree should meet rigidity requirement, prevent basement negative one layer roof plate template from sinking, bed course absolute altitude should be with the minus two floors board bottom of basement Absolute altitude is consistent, and crossbeam, floor construction shuttering supporting bottom of upright rod should add backing plate, prevents bed course part differential settlement, carries out Basement negative one layer crossbeam, floor construction concreting;
Construction is removed in the minus two layers of excavation of earthwork of step 7. basement;
After basement negative one layer crossbeam, floor construction concrete reach the strength of mould stripping of code requirement, support frame is removed Body carries out the excavation of earthwork of two layers of underground and removes, and the excavation of earthwork removing of two layers of underground is tunneling, using the stage excavation earthwork, often Thickness degree is less than 1 meter, and the foundation pit side of earth excavation and exterior wall back gauge are not less than 2 meters, and grade of side slope should be full according to soil property situation The slope requirement of sufficient natural discharging slope pours minus two according to substrate soil property situation after the completion of the minus two layers of excavation of earthwork of basement is removed Layer concrete bed course.
After first floor contignation concrete reaches the strength of mould stripping of code requirement after ground, supporting frame is removed, carries out ground Under minus two layers of excavation of earthwork remove, this layer and the following floor earthwork are tunneling.The earthwork, every thickness degree are removed using layer digging Less than 1 meter, excavates the foundation pit side for removing the earthwork and exterior wall back gauge is not less than 2 meters, grade of side slope should meet according to soil property situation The slope requirement of natural discharging slope.Excavator should regard story height, structural post span, layout and soil property situation and select long-armed digging Pick machine, crawler belt grab bucket shovel vertical transport are unearthed.Unearthed sequence should from soil outlet to building intermediate region extend, then again to Surrounding expands.Temporary road should carry out cure process according to soil property situation.
It excavates and pastes reflection alarming band in every pillar external corner before removing, and detailed safe practice friendship is carried out to driver Bottom forbids to encounter structural post, crossbeam and floor in the construction process.
Minus two layers of the crossbeam of step 8. basement, floor construction construction;
The negative two-layer structure crossbeam of basement, floor slab construction are carried out on the minus two layer concretes bed course of basement, due to underground Room pillar is constructed in advance, and each layer crossbeam in underground, floor successively pour from top to bottom with soil excavation progress, by reserving on column Frictional force receiving basement floor live load and self weight between shear reinforcement and ring beam and pillar, the crossbeam of every layer of basement, Synchronous construction is answered in floor construction concreting.
The processing of underground structure bean column node
After excavation of earthwork is scavenged into floor bottom absolute altitude, cure process is carried out to substrate depending on soil body situation, then carries out underground Structural beam slab construction.Since basement pillar is constructed in advance, and each layer beam slab in underground is layer-by-layer from top to bottom with soil excavation progress It pours, therefore the processing of bean column node is the priority control project of underground structure.
It is living that basement floor is born by the frictional force reserved between shear reinforcement (or bar planting) and crossbeam and pillar on column Load and self weight.Ring beam tie is set i.e. in the crossbeam high scope of basement floor, and sectional dimension should be through designing with arrangement of reinforcement It is determined after checking computations, the height of tie is preferably consistent with the main depth of beam of basement.Basement girder reinforcing bar anchors into tie, anchoring Length should meet the requirement of related specifications, atlas.The reinforcing bar of tie, template system peace, concreting should be with the beam slab of basement Structure synchronization construction.
Needed pillar surface dabbing before construction first, high-frequency low vibration machinery selected to carry out dabbing, when dabbing operation The old face of concrete thoroughly chisels out, and exposes novel concrete layer, and dabbing operation Shi Buying hurts the structure of building.
Tie main reinforcement and want muscle using two " door " word hoop single-selded lap joints.Basement girder steel bar end must reach column Side, and bent anchor 15d, slab muscle are anchored into beam.Reinforcing bar at tie is closeer, is shaken when casting concrete using minor diameter vibrating spear It smashes, anti-leak-stopping stick avoids quality defect of concrete.Figure is shown in the processing of basement bean column node.
In the embodiment of the present invention, step 6,7 and step 8 are repeated, realizes the construction of basement multilayer.
The present invention is in construction, the anti-floating bottom plate and anchor bolt construction that are related to
If basement bottom board absolute altitude is lower than level of ground water, then bottom plate just needs to consider the requirement of anti-floating.Structural beams can be used Plate anti-floating can also be used anti-floating bottom plate+anti-float anchor rod form, no matter is both needed to after design checking, be determined using which kind of form Specific arrangement and method for construction.Structural beams, floor slab construction and basic beam slab are essentially identical;Anti-float anchor rod+anti-floating construction of bottom plates needs It is noted that several points:
(1) precipitation should all be carried out to basis using water pump or other dewatering measures in entire work progress, makes underground water It is best for keeping below anti-floating bottom plate 1-1.5m.
(2) dowel should be made to be located in the middle part of anchor hole for anchor rod anchored section, place simultaneously ensures that cement mortar protective course thickness is greater than 25mm.
(3) anchor pole should be tested before anchor pole full-scale construction to determine rock-bolt length.Test should according to different soil layer situations, Rock-bolt length and design resistance to plucking force request determine experimental group number.The group number of every case at least takes 1 group, and every group of anchor pole number must not Less than 3;The foundation that test report determines this place rock-bolt length as designer should be formed after the completion of test.
(4) pile hole, which enters after medium weathering rock stratum reaches projected depth, answers timely borehole cleaning, is inserted into dowel and grouting, especially It is that anchoring section will take measures to remove rock slag, meeting crack in hole cannot block, and slurry placement should be allowed closely knit, guarantee mortar and palisades Between it is well-bonded.To make in anchoring section cement mortar packing real, grout pipe will be inserted into bottom hole, be perfused since the lowermost portion, with Remaining water in evacuation aperture.
(5) anchor pole, should be with protection casing pipe-following drilling in soil layer section such as soil layer collapse hole or mud, quicksand.
(6) it should be appropriately adjusted according to site operation situation when anchor hole is in the milk, deteriorate rock mass to avoid because pressure is excessive Crack.
(7) it should take measures to guarantee that anchor pole anchors into length in middle weathered rock when constructing.When reaching drilling depth, take out More complete core, it is necessary to reach middle weathering standard through geological survey units identification, anchoring section beginning can be used as.When encountering broken shape rock When body, the anchorage length of anchor pole should be surveyed according to the concrete condition at scene by ground, designer is separately fixed.
Construction anti-floating bottom plate, anti-floating base plate thickness are determined by design after to anti-float anchor rod construction.Anti-float anchor rod upper end It anchors into anti-floating bottom plate, is formed whole.
Purpose monitoring
It in the method for the present invention construction, should be monitored, since monitoring basement constructing to after basement completion three A month.Gradient, inclined direction, the position of Ramp rates and ground fractures, trend, length, width including Nearby Structure Degree, variation degree are monitored.
Level of ground water is also coped in implementation process to be monitored.Water level pipe is set in through hole, using the methods of water-level gauge It measures.Water table measure precision not preferably less than 10mm.
Reinforce on-the-spot make an inspection tour and monitoring, the data of monitoring counted, arrange, are analyzed, in time reports analysis result, The case where such as there are monitoring data beyond corresponding specification, should early warning immediately, stop field operation, and report at relevant departments' discussion Reason scheme.
Case history 1 of the present invention
Precious energy century city project East hotel and Office Building Project
Precious energy century city project East hotel and Office Building Project are located at Ganzhou City, Jiangxi Province Ganjiang River source main road and Rui Jinlu Intersection.This engineering structure system is steel and concrete column framed-tube structure;The number of plies is 43 layers on the ground, F3/B3, building structure Total height is 182.05m.Building uses function: hotel, office and mating.Overall floorage 66035.91 ㎡ in ground builds base 1862.33 ㎡ of floor space, main building are 43 layers of office building and hotel, and the high 3.9 ~ 6.55m of layer, total high 182.05m are 3 layers of basement, high 15.2m frame structure.Ground is in business business district, and nearby residents building is more, and construction site is narrow.The engineering is opened in January, 2016 Work, in July, 2018 are completed.
For this engineering since geologic condition and surrounding enviroment factor influence, -2, -3 layers use reverse construction.According to contrary sequence method Construction needs, and -2, -3 layers of pillar primary concreting to -1 layer of beam bottom, -2 layers of contignation need after-pouring to construct.It is all made of this work Method construction, achieves good economic benefit and social benefit.
Case history 2 of the present invention
Foshan treasured energy JinRong Building engineering
Foshan treasured energy JinRong Building engineering is located at Fushan City, Guangdong Province Foshan new city south of the Five Ridges main road and Fuhua road northeast with one voice Angle.3 layers of this engineering underground, 31 layers, 149.5m, 81959.34 ㎡ of overall floorage, wherein 19791.72 ㎡ of underground on the ground, on the ground 62167.62㎡.Engineering is Frame-Shear wall, is gone into operation in September, 2014, and in July, 2017 is completed.This engineering is due to week Surrounding environment limitation, -2, -3 layers are pressed reverse construction, have been saved project cost in construction, have been increased the effective of contrary sequence method basement Usable floor area achieves good economic benefit and social benefit.
This engineering method not only ensure that construction speed, also achieve very big economic benefit, and profit is up to 20%.Pass through simultaneously The final acceptance inspeciton of construction quality, reaches design and code requirement, and qualification rate shows this engineering method in reverse construction up to 100% In have a wide range of applications.

Claims (2)

1. a kind of reverse construction method of building basement structure, which, which uses, pours ground in earlier molding pile hole After flowering structure pile, then the method for carrying out underground structure part adverse construction method is realized, it is characterised in that: the construction method by with Lower step is realized:
The pile hole construction of basement structure is carried out on step 1. ground, and retaining wall processing, pile are carried out to the pile hole of formation In the construction of hole, pile hole is divided into basement space size stake holes part below and passes through the post holes portion of basement space size Point, the pillar for being greater than 0.8-1.2 meters of pillar overall size for passing through the aperture size of post holes part of basement space size Construction space;
Step 2. stake concreting: stake steel reinforcement cage is fitted in place in stake holes partial hole, the errorless after-pouring stake of multiple line Core concrete, at stake concreting to pillar joint bar anchored end bottom absolute altitude, the secondary pouring stake after the binding installation of column joint bar Sub- concrete is to designed elevation;
Step 3. pillar concreting:
Pillar reinforcing bar is tied up, the binding of column tie-bar is carried out in the post holes of post holes part, when the binding of pillar reinforcing bar is installed, according to ground Lower floor absolute altitude and design position install the horizontal embedded ribs of fixed underground room exterior wall and pillar hoop shearing resistance embedded ribs;
Fixed post template is installed, the installation of post template is fixed, by stencil design requirements in the post holes of post holes part under oneself And upper progress;
Pillar concrete is poured to pillar designed elevation in the fixed post template of installation;
Step 4. basement negative one layer structure excavation of earthwork is removed;
After the completion of stake concrete and pillar concreting, using mechanical and artificial combination to basement negative one layer structure Excavation of earthwork is removed, and is excavated and is carried out Demolition Construction to the post template of negative one layer after removing;
Step 5. basement negative one layer exterior wall concrete structure construction;
It should be inserted into external wall construction in time in basement negative one layer structure excavation of earthwork reset procedure, each construction height should regard week Side soil body situation scene is determined that exterior wall horizontal reinforcement is reserved when constructing using the method and pillar of single-selded lap joint by design specification Muscle welding, when upper section Retaining wall, should reserve vertical bar and connect with lower section vertical bar, horizontal steel plate for sealing water or waterproof groove is arranged;
Step 6. basement structure construction;
After the completion of basement negative one layer excavation of earthwork is removed, according to substrate soil property situation casting concrete bed course, cushion thickness is answered Meet rigidity requirement, prevents basement negative one layer roof plate template from sinking, bed course absolute altitude should be with the minus two floors board bottom absolute altitude of basement Unanimously, crossbeam, floor construction shuttering supporting bottom of upright rod should add backing plate, prevent bed course part differential settlement, carry out underground Room negative one floor crossbeam, floor construction concreting;
Construction is removed in the minus two layers of excavation of earthwork of step 7. basement;
After basement negative one layer crossbeam, floor construction concrete reach the strength of mould stripping of code requirement, supporting frame is removed, into The excavation of earthwork of two layers of row underground is removed, and the excavation of earthwork removing of two layers of underground is tunneling, using the stage excavation earthwork, every thickness degree Less than 1 meter, the foundation pit side of earth excavation and exterior wall back gauge are not less than 2 meters, and grade of side slope should meet nature according to soil property situation The slope requirement of slope pours minus two layers of coagulation according to substrate soil property situation after the completion of the minus two layers of excavation of earthwork of basement is removed Soil padding;
Minus two layers of the crossbeam of step 8. basement, floor construction construction;
The negative two-layer structure crossbeam of basement, floor slab construction are carried out on the minus two layer concretes bed course of basement, due to basement column Sub construction in advance, and each layer crossbeam in underground, floor successively pour from top to bottom with soil excavation progress, by reserving shearing resistance on column Frictional force between reinforcing bar and ring beam and pillar bears basement floor live load and self weight, crossbeam, the floor of every layer of basement Structural concrete, which pours, answers synchronous construction.
2. a kind of reverse construction method of building basement structure according to claim 1, it is characterised in that: repeat to walk Rapid 7 and step 8, realize the construction of basement multilayer.
CN201611198350.9A 2016-12-22 2016-12-22 A kind of reverse construction method of building basement structure Active CN107542108B (en)

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CN109778906A (en) * 2019-01-31 2019-05-21 重庆科技学院 The construction method of the small-sized material storage room in underground
CN111764578A (en) * 2020-07-07 2020-10-13 中建一局集团建设发展有限公司 Reverse construction pile column structure and construction method thereof
CN111998839B (en) * 2020-07-10 2021-06-15 北京城建集团有限责任公司 Support column positioning and verticality detection system based on reverse construction method
CN111877399A (en) * 2020-07-28 2020-11-03 南通隆嘉机械科技有限公司 Construction method for rapid channel sinking culvert construction by reverse operation
CN111851584A (en) * 2020-07-31 2020-10-30 山东建筑大学 Construction method of reinforced concrete frame structure column foundation enclosure beam in reverse construction method
CN111779027A (en) * 2020-08-18 2020-10-16 北京中岩智泊科技有限公司 Construction method for constructing underground garage through cover-excavation top-down construction

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