CN107542108A - 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
CN107542108A
CN107542108A CN201611198350.9A CN201611198350A CN107542108A CN 107542108 A CN107542108 A CN 107542108A CN 201611198350 A CN201611198350 A CN 201611198350A CN 107542108 A CN107542108 A CN 107542108A
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construction
basement
pillar
excavation
earthwork
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CN107542108B (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, solves the problems, such as the difficulty of land subsidence around foundation ditch, road, building, underground utilities deformation dislocation and excavation of foundation pit subsequent construction, the engineering method in the pile hole being molded in advance using after pouring underground structure pile, realize that the construction method is realized by following steps in the method for carrying out underground structure part adverse construction method:The pile hole construction of basement structure is carried out on 1 ground, pile hole is divided into the stake holes part below basement space size and passes through the post holes part of basement space size.2. stake concreting.3. pillar concreting.4. the excavation of earthwork of basement negative one Rotating fields is removed.5. basement negative one layer exterior wall concrete structure construction.6. structure construction is removed in the excavation of earthwork of basement negative one layer.7. construction is removed in the minus two layers of excavation of earthwork of basement.8. the crossbeam that minus two layers of basement, floor construction are constructed.Beneficial effect is, construction method is simple, efficiency high, cost are low.

Description

A kind of reverse construction method of building basement structure
Technical field
The present invention relates to a kind of construction techniques, particularly a kind of reverse construction method of building basement structure.
Background technology
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.Prior art is being applied using first excavation foundation ditch The method of work, but being continuously increased with cutting depth, the cone of depression influence area scope that precipitation is formed also constantly expands, right The influence of existing building is also increasing around foundation ditch, prior art cause land subsidence around foundation ditch, road, building, Underground pipelines deformation dislocation and the difficulty of excavation of foundation pit subsequent construction.
Goal of the invention
To solve land subsidence around above-mentioned foundation ditch, road, building, underground utilities deformation dislocation and excavation of foundation pit subsequent construction The problem of difficult, the present invention discloses a kind of reverse construction method of building basement structure, close for Around building Collection, the complicated area of underground utilities, make integrated construction using inverse in underground structure part, obtain better effects.
The present invention realizes that the method that goal of the invention uses is:
A kind of reverse construction method of building basement structure, the engineering method use and pour underground in the pile hole being molded in advance After structure pile pillar, realize that the construction method is realized by following steps in the method for carrying out underground structure part adverse construction method:
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 the stake holes part below basement space size and passes through the post holes portion of basement space size Divide, the pillar of pillar overall size 0.8-1.2 rice is more than 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, 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 post joint bar colligation installation Stake concrete is noted to designed elevation;
Step 3. pillar concreting:
Pillar reinforcing bar is tied up, the colligation of column tie-bar is carried out in the post holes of post holes part, when the colligation of pillar reinforcing bar is installed, according to ground Lower floor absolute altitude and design attitude install the horizontal embedded ribs of fixed underground room exterior wall and pillar hoop shearing resistance embedded ribs;
The fixed post template of installation, the installation of post template are 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;
The excavation of earthwork of step 4. basement negative one Rotating fields is removed;
After the completion of stake concrete and pillar concreting, using mechanical and artificial combination to basement negative one Rotating fields 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;
External wall construction should be inserted in time in basement negative one Rotating fields 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 being constructed using the method for single-selded lap joint with pillar by design specification Muscle weld, it is upper section Retaining wall when, should reserve vertical bars with it is lower save vertical bars be connected, horizontal steel plate for sealing water or waterproof groove are set;
Step 6. basement structure construction;
After the completion of the excavation of earthwork of basement negative one layer is removed, according to substrate soil property situation casting concrete bed course, cushion thickness 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 plate 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, is entered The excavation of earthwork of two layers of row underground is removed, and it is tunneling that the excavation of earthwork of two layers of underground, which is removed, using the stage excavation earthwork, per thickness degree Less than 1 meter, foundation ditch side and the exterior wall back gauge of earth excavation are not less than 2 meters, and grade of side slope should meet nature according to soil property situation The slope requirement of slope, after the completion of the minus two layers of excavation of earthwork of basement is removed, minus two layers of coagulation is poured according to substrate soil property situation Soil padding;
The crossbeam that minus two layer of step 8. basement, floor construction construction;
Basement is carried out on the minus two layer concretes bed course of basement and bears two-layer structure crossbeam, floor slab construction, due to basement post 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 post Frictional force between reinforcing bar and ring beam and pillar bears basement floor live load and deadweight, crossbeam, the floor of every layer of basement Structural concrete, which pours, answers synchronous construction.
The invention has the advantages that construction method is simple, efficiency high, cost are low, can solve ground around foundation ditch Depression, road, building, underground utilities deform the technical problems such as the difficulty of dislocation and excavation of foundation pit subsequent construction.This construction It is primarily adapted for use in that geology location, close to buildings and surrounding environment that engineering pile is caisson be sensitive to sedimentation and deformation, construction work Phase anxiety, the Large Underground Structure engineering that construction site is narrow, surrounding buildingses density is big.
The present invention is described in detail below in conjunction with the accompanying drawings.
Accompanying drawing 1 is construction flow chart of the present invention.
Embodiment:
The technological principle that the present invention constructs is:The construction method of multi-storey basement of the present invention is a kind of " closed " construction 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 size Following stake holes part and the post holes part for passing through basement space size, the post holes part for passing through basement space size Aperture size be more than the pillar construction space of pillar overall size 0.8-1.2 rice, inner concrete is real in stake holes after pouring The pillar of underground structure is applied, the horizontal reinforcement of reserved beam shear reinforcement and wall is needed in pillar work progress.Then negative one layer is carried out 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, utilize it Horizontal support as 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, pile are carried out to the pile hole of formation In the construction of hole, pile hole is divided into the stake holes part below basement space size and passes through the post holes portion of basement space size Divide, the pillar of pillar overall size 0.8-1.2 rice is more than for passing through the aperture size of post holes part of basement space size Construction space.
The construction of pile hole in strict accordance with pertinent regulation, standard construction outside, the technical measures that use of constructing for:
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 more than post Sub- overall size 0.8-1.2 rice, enlarged diameter are dimensioned to meet pillar construction operation, most preferably take 800~1000mm as benefit, The bottom absolute altitude for expanding stake holes is less than 30~50mm of bottom of pillar bottom joint bar.
When drift sand situation is lighter, shorten the cutting depth of this circulation to 0.5m, during 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 be used and be spun Knit the gradual heap of bag to block up, form the outer wall in pile hole, and control and ensure that inwall meets design requirement.
When quicksand is more serious, with the method for lower steel bushing, steel bushing is similar to the punching block of retaining wall, is straight using hole external diameter Footpath, 4~6 sections of circular arcs are divided into, along with appropriate rib, are mutually connected with bolt or reinforcing bar latch closure, excavating 0.5m or so, Can burst sleeve is loaded, go deep into bottom hole and be no less than 0.2m, insertion top concrete guard wall outside portion is less than 0.5m, is after dress Formwork pours into a mould 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, 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 post joint bar colligation installation Stake concrete is noted to designed elevation.
Stake concreting:
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 mixes Solidifying soil is poured to the absolute altitude of post joint bar anchored end bottom, after the colligation of pillar joint bar installation after secondary pouring stake concrete to design mark It is high.
Step 3. pillar concreting:
Pillar reinforcing bar is tied up, the colligation of column tie-bar is carried out in the post holes of post holes part, when the colligation of pillar reinforcing bar is installed, according to ground Lower floor absolute altitude and design attitude install the horizontal embedded ribs of fixed underground room exterior wall and pillar hoop shearing resistance embedded ribs.
The fixed post template of installation, the installation of post template is fixed, by stencil design requirement in the post holes of post holes part Carry 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 into a mould in stake holes
Axis side is put in a walling crib, and carries out paint marks;Axis is fallen within the concrete of stake top again, mixed on stake top Pillar is put on solidifying soil and goes out joint bar position, colligation post joint bar, steel pipe frame positioning;Post joint bar concrete, coagulation are poured using automotive pump Soil pours high to design base top mark.
Pillar cage bar uses straight screw connection with joint bar, first sets up steel pipe lantern stand, makees the positioning of pillar reinforcing bar, ensures reinforcing bar Plan-position and perpendicularity.Bar bender carries out the colligation of column tie-bar in pillar hole.Because operating space is limited in hole, pillar Stirrup can only entangle pillar cage bar from top, be fastened with rope, slip into bottom, from the bottom up colligation column tie-bar.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 attitude and pillar hoop shearing resistance is pre- Bury muscle.
Post template fabrication and installation.Detailed template assembly figure was drawn out before template is made and makes drawing and is used for Instruct the making 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 set by pillar cross-sectional width, with steel pipe support on pile concrete retaining wall after jacking.Tie installation should Carried out from bottom to top by stencil design requirement, 200mm is started setting up in pouring concrete stake.After post template installs, The perpendicularity of template should be checked comprehensively, diagonal line length is poor, the project such as sectional dimension, support must firmly, built-in fitting, reservation member, Reserving hole forbids leakage to set, it is necessary to accurate, firm.
Pillar concreting.Reply template watering moistening before pouring, the cleanout of column template should remove debris and product It is re-closed after water.Quick-fried mould is forbidden in pillar concreting, when pouring carpenter should be arranged to keep mould, situation timely processing such as occurs. If pillar is highly more than 2 meters, concreting should use tumbling barrel or conduit.
The excavation of earthwork of step 4. basement negative one Rotating fields is removed;
After the completion of stake concrete and pillar concreting, using mechanical and artificial combination to basement negative one Rotating fields 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 spoil ground outside the venue. Rainy day construct when and soft foundation earthwork transportation road, making slabstone is answered, if necessary place mat steel plate, to ensure that the earthwork is normal Transport.Specifically trend determines that width should meet the requirement of earthwork transportation according to on-site actual situations to temporary road.Excavation of earthwork is clear Except being excavated to stopping during designed elevation above 300mm, using hand excavation to designed elevation.Grade of side slope should be according to soil property feelings Condition, meet the slope requirement of natural discharging slope.
The reinforced concrete core-tube poured during former construction stake post holes, cut in earth excavation using rock drill, using useless Old template carries out parcel protection to pillar, prevents retaining wall from causing to damage to pillar during abolishing.
External wall construction should be inserted in time in excavation of earthwork reset procedure, each construction height should show depending on 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 for single-selded lap joint with former pillar Connect.Outer wall template is single-side support system.Scaffold support, model sheetinstallat firm supporting, there must not be loosening, run mould, sinking etc. Phenomenon.It should ensure that DESIGN OF RETAINING WALLS shape, size and position are accurate, and it is easy to disassemble.Since the second section barricade, template should prop up If angle is easy to concreting, concreting is higher by barricade top 10-20cm, ensures that concrete pours to template angle top Build quality.After template to be removed, artificial chisel removes angle concrete.
During upper section Retaining wall, vertical bars should be reserved and be connected with lower section vertical bars, horizontal steel plate for sealing water or waterproof groove are set.Gear After wall is constructed, if there is infiltration phenomenon, it can be drilled in seepage part and set osculum and drainpipe to dredge infiltration.
Step 5. basement negative one layer exterior wall concrete structure construction;
External wall construction should be inserted in time in basement negative one Rotating fields 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 being constructed using the method for single-selded lap joint with pillar by design specification Muscle weld, it is upper section Retaining wall when, should reserve vertical bars with it is lower save vertical bars be connected, horizontal steel plate for sealing water or waterproof groove are set.
Step 6. basement structure construction;
After the completion of the excavation of earthwork of basement negative one layer is removed, according to substrate soil property situation casting concrete bed course, cushion thickness 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 plate 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, is entered The excavation of earthwork of two layers of row underground is removed, and it is tunneling that the excavation of earthwork of two layers of underground, which is removed, using the stage excavation earthwork, per thickness degree Less than 1 meter, foundation ditch side and the exterior wall back gauge of earth excavation are not less than 2 meters, and grade of side slope should meet nature according to soil property situation The slope requirement of slope, after the completion of the minus two layers of excavation of earthwork of basement is removed, minus two layers of coagulation is poured according to substrate soil property situation Soil padding.
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 is removed using layer digging, per thickness degree Less than 1 meter, excavate the foundation ditch 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 order should extend from soil outlet to building intermediate region, then again to Surrounding expands.Temporary road should carry out cure process according to soil property situation.
Excavate and paste reflection alarming band in every pillar external corner before removing, and detailed safe practice is carried out to driver and handed over Bottom, forbid to encounter structural post, crossbeam and floor in work progress.
The crossbeam that minus two layer of step 8. basement, floor construction construction;
Basement is carried out on the minus two layer concretes bed course of basement and bears two-layer structure crossbeam, floor slab construction, due to basement post 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 post Frictional force between reinforcing bar and ring beam and pillar bears basement floor live load and deadweight, crossbeam, the floor of every layer of basement Structural concrete, which pours, answers synchronous construction.
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 structure Beam-Slab Construction.Because basement pillar is constructed in advance, and each layer beam slab in underground successively pours from top to bottom with soil excavation progress, Therefore the processing of bean column node is the priority control project of underground structure.
Basement floor is born by the frictional force reserved on post between shear reinforcement (or bar planting) and crossbeam and pillar to live Load and deadweight.Ring beam tie is set i.e. in the crossbeam high scope of basement floor, and its sectional dimension should be through design with arrangement of reinforcement Determined after checking computations, the height of tie is preferably highly consistent with basement girder.Basement girder reinforcing bar is anchored 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 is constructed.
Needed pillar surface dabbing before construction first, dabbing carried out from high-frequency low vibration machinery, during dabbing operation The old face of concrete is thoroughly chiseled out, and exposes novel concrete layer, and the structure of building should not be hurt during dabbing operation.
Tie cage bar and muscle is wanted to use two " door " word hoop single-selded lap joints.Basement girder steel bar end must reach post Side, and bent anchor 15d, slab muscle are anchored into beam.Reinforcing bar at tie is closeer, is shaken using minor diameter vibrating spear during casting concrete Smash, anti-leak-stopping rod, avoid causing quality defect of concrete.Figure is shown in the processing of basement bean column node.
In the embodiment of the present invention, repeat step 6,7 and step 8, realize that basement multilayer is constructed.
The present invention is in construction, the anti-floating bottom plate and anchor bolt construction that are related to
As basement bottom board absolute altitude is less than level of ground water, then bottom plate just needs to consider the requirement of anti-floating.It can be resisted using structural beam slab It is floating, the form of anti-floating bottom plate+anti-float anchor rod can be also used, no matter is both needed to using which kind of form after design checking, it is determined that specifically 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 should be noted Once some:
(1) water pump or other dewatering measures all should be used to carry out precipitation to basis in whole work progress, keeps underground water It is optimal less than anti-floating bottom plate 1-1.5m.
(2) anchor rod anchored section should be such that dowel is located in the middle part of anchor hole, and place simultaneously ensures that cement mortar protective course thickness is more than 25mm.
(3) anchor pole should be tested before anchor pole full-scale construction to determine rock-bolt length.Experiment should according to different soil layer situations, Rock-bolt length and design withdrawal resistance require to determine experimental group number.The group number of each situation 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 experiment.
(4) timely borehole cleaning is answered in pile hole after reaching projected depth into medium weathering rock stratum, inserts dowel and grouting, especially It is that anchoring section will take measures to remove rock slag, meeting crack in hole can not be blocked, and slurry placement should be allowed closely knit, ensure mortar and palisades Between it is well-bonded.To make in anchoring section cement mortar packing real, grout pipe wants patchhole bottom, irrigates 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) should be appropriately adjusted when anchor hole is in the milk according to site operation situation, to avoid deteriorating rock mass because pressure is excessive Crack.
(7) should take measures to ensure 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 top can be used as.When running into broken shape rock During body, the anchorage length of its anchor pole should be surveyed according to the concrete condition at scene by ground, designer is separately fixed.
Anti-floating bottom plate of being constructed after anti-float anchor rod construction is treated, anti-floating base plate thickness is determined by design.Anti-float anchor rod upper end Anchor into anti-floating bottom plate, formed overall.
Purpose monitoring
It in the inventive method construction, should be monitored, monitor after being completed since construction basement to basement three months. Gradient, incline direction, the position of Ramp rates and ground fractures including Nearby Structure, trend, length, width, change Change degree is monitored.
Level of ground water is also tackled in implementation process to be monitored.By setting water level pipe in hole, the methods of using water-level gauge Measure.Water table measure precision not preferably less than 10mm.
Strengthen on-the-spot make an inspection tour and monitoring, the data of monitoring counted, arrange, analyzed, in time report analysis result, Such as there is the situation that Monitoring Data exceeds 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 of Jiangxi Province Ganjiang River source main road and had a common boundary with Rui Jin road Place.This engineering structure system is steel and concrete post framed-tube structure;The number of plies is 43 layers on the ground, F3/B3, and building structure is always high Spend for 182.05m.Building uses function:Hotel, office and supporting.The ㎡ of ground overall floorage 66035.91, build basal surface 1862.33 ㎡ of product, main building are 43 layers of office building and hotel, and 3.9 ~ 6.55m of floor height, always high 182.05m, 3 layers of basement are high 15.2m frame structure.Ground is in business business district, and nearby residents building is more, and construction site is narrow and small.The engineering is opened in January, 2016 Work, in July, 2018 are completed.
For this engineering because 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.Use this work Method is constructed, and achieves good economic benefit and social benefit.
Case history 2 of the present invention
Foshan is precious can JinRong Building engineering
The precious energy JinRong Building engineering in Foshan is located at Fushan City, Guangdong Province Foshan new city south of the Five Ridges main road and Fuhua road northeast corner with one voice.This 3 layers of engineering underground, 31 layers, 149.5m, the ㎡ of overall floorage 81959.34, wherein the ㎡ of underground 19791.72 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 is limited, and -2, -3 layers are pressed reverse construction, have been saved construction costs in construction, have been increased the effective of contrary sequence method basement Usable floor area, achieve 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, qualification rate show 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, the engineering method uses and pours ground in the pile hole being molded in advance After lower structure pile pillar, realized in the method for carrying out underground structure part adverse construction method, 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 the stake holes part below basement space size and passes through the post holes portion of basement space size Divide, the pillar of pillar overall size 0.8-1.2 rice is more than 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 post joint bar colligation installation Sub- concrete is to designed elevation;
Step 3. pillar concreting:
Pillar reinforcing bar is tied up, the colligation of column tie-bar is carried out in the post holes of post holes part, when the colligation of pillar reinforcing bar is installed, according to ground Lower floor absolute altitude and design attitude install the horizontal embedded ribs of fixed underground room exterior wall and pillar hoop shearing resistance embedded ribs;
The fixed post template of installation, the installation of post template are 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;
The excavation of earthwork of step 4. basement negative one Rotating fields is removed;
After the completion of stake concrete and pillar concreting, using mechanical and artificial combination to basement negative one Rotating fields 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;
External wall construction should be inserted in time in basement negative one Rotating fields 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 being constructed using the method for single-selded lap joint with pillar by design specification Muscle weld, it is upper section Retaining wall when, should reserve vertical bars with it is lower save vertical bars be connected, horizontal steel plate for sealing water or waterproof groove are set;
Step 6. basement structure construction;
After the completion of the excavation of earthwork of basement negative one layer is removed, according to substrate soil property situation casting concrete bed course, cushion thickness 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 plate 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, is entered The excavation of earthwork of two layers of row underground is removed, and it is tunneling that the excavation of earthwork of two layers of underground, which is removed, using the stage excavation earthwork, per thickness degree Less than 1 meter, foundation ditch side and the exterior wall back gauge of earth excavation are not less than 2 meters, and grade of side slope should meet nature according to soil property situation The slope requirement of slope, after the completion of the minus two layers of excavation of earthwork of basement is removed, minus two layers of coagulation is poured according to substrate soil property situation Soil padding;
The crossbeam that minus two layer of step 8. basement, floor construction construction;
Basement is carried out on the minus two layer concretes bed course of basement and bears two-layer structure crossbeam, floor slab construction, due to basement post 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 post Frictional force between reinforcing bar and ring beam and pillar bears basement floor live load and deadweight, crossbeam, the floor of every layer of basement Structural concrete, which pours, answers synchronous construction.
A kind of 2. 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 that basement multilayer is constructed.
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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CN108560728A (en) * 2018-02-12 2018-09-21 杨春 Loose tool pouring type integral top lifting construction method
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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
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
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
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
CN111998839A (en) * 2020-07-10 2020-11-27 北京城建集团有限责任公司 Support column positioning and verticality detection system based on reverse construction method
CN112482437A (en) * 2020-10-15 2021-03-12 上海建工二建集团有限公司 Integrated vertical supporting system for reverse construction pile and construction method thereof

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108560728A (en) * 2018-02-12 2018-09-21 杨春 Loose tool pouring type integral top lifting construction method
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
CN111998839A (en) * 2020-07-10 2020-11-27 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
CN112482437A (en) * 2020-10-15 2021-03-12 上海建工二建集团有限公司 Integrated vertical supporting system for reverse construction pile and construction method thereof

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