CN103615001A - Bored pile construction method for reinforcing cage framework layered installation - Google Patents
Bored pile construction method for reinforcing cage framework layered installation Download PDFInfo
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- CN103615001A CN103615001A CN201310613695.6A CN201310613695A CN103615001A CN 103615001 A CN103615001 A CN 103615001A CN 201310613695 A CN201310613695 A CN 201310613695A CN 103615001 A CN103615001 A CN 103615001A
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Abstract
The invention discloses a bored pile construction method for reinforcing cage framework layered installation. The bored pile construction method for reinforcing cage framework layered installation comprises the steps of (a) making preparation for construction, (b) setting out a pile position, (c) manufacturing a pile casing and pre-burying the pile casing, (d) drilling a bore, (e) reinforcing a dado, (f) cleaning the bore for the first time, (g) manufacturing reinforcing cage frameworks and installing the reinforcing cage frameworks in a layered mode, (h) placing a guide tube, (i) cleaning the bore for the second time, (j) pouring concrete, (k) recycling the pile casing and (l) backfilling the pile bore. According to the bored pile construction method for reinforcing cage framework layered installation, the reinforcing cage frameworks are placed in the bore in a layered mode, aligned one by one and welded, so that a reinforcing cage is installed, and a traditional method that the reinforcing cage is directly installed is replaced; the reinforcing cage can be stably placed in the bore, and the reinforcing cage is prevented from colliding against the wall of the bore and prevented from deforming; in addition, the reinforcing cage can be accurately located to the center of a bore site, and the reinforcing cage is prevented from floating or sinking in the process of concrete pouring. Besides, by the adoption of the bored pile construction method for reinforcing cage framework layered installation, the speed is high, a construction period is short, and the quite high scientific performance and the feasibility are achieved.
Description
Technical field
The invention belongs to ground pile-driving method technical field, be specifically related to a kind of bored pile construction method that reinforcement cage skeleton layering is installed.
Background technology
Development along with market economy, construction market day by day perfect, root pile due to its applicability extensively, flexible structure, construction be simple, extensive use in Base Consolidation Engineering, because root pile construction is simple, less demanding to machinery, there is many qualitative problems of construction, so the general bored pile construction method that adopts is carried out ground piling at present.Bored pile construction method takes to transfer reinforcing cage step behind boring clear complete hole at present, the whole reinforcing cage of making is sling, put into hole, but following problems may be encountered: reinforcing cage volume is excessive, the arm that need to the promote certain altitude reinforcing cage of just slinging, makes troubles to constructor; Reinforcing cage, in decentralization process, because weight is large, easily rocks, and collision hole wall, causes the hole that collapses; When reinforcing cage is transferred, be not easy accurately to navigate to Kong Wei center, easily cause floating or sinking when concreting, affect workmanship.
Summary of the invention
The invention provides a kind of bored pile construction method that reinforcement cage skeleton layering is installed, object is to transfer reinforcement cage skeleton by layering, then weld together, formation meets the reinforcing cage of designing requirement, can steadily transfer reinforcing cage like this, avoid colliding hole wall, and can accurately navigate to Kong Wei center, avoid rising of steel cage or sinking when concreting.
The present invention adopts following technical scheme:
The bored pile construction method that reinforcement cage skeleton layering is installed, is characterized in that comprising the steps:
(a) preparation of construction:
According to the constructor in Design of Construction Organization, construction equipment and material etc., carry out construction site layout, build operation platform;
(b) setting-out stake position:
According to the layout of the axis in the drawing of design and stake, utilize total powerstation to measure unwrapping wire, set up on construction ground and control net again, then control point and bench mark being carried out to cement mortar fixes, then according to controlling net, adopt transit to carry out stake position and accurately follow closely with timber setting-out ， pile center position, for precise control nails on iron nail again and accurately locates on stake top, with cross pile form, establish fender pile simultaneously;
(c) casing is made with pre-buried:
Select steel casing, with reinforcing bar, draw Zhuan Wei center, adjust casing plan-position, then bury casing underground, then use clay backfill casing surrounding;
(d) drilling and forming hole:
First set up drilling cramp, adjust rig position, center, align piles hole, then according to geologic report, after casing is buried underground and located, on the burr-drill of rig, do length mark, rig adopts revolution and impacts the mode of creeping into mutually combining, and stablizes and holes from top to bottom, and utilize drill bit impact mode to carry out pulping to the percussion of earth, with clear water, regulate mud balance, form mud off;
(e) retaining wall is reinforced:
Assembly pulley and electric block are first installed, and then at retaining wall place additional bar, then concreting carries out deburring reinforcing;
(f) clear hole once:
When rig is drilled into after designing requirement hole depth, lift from drill bit, with sediment at the bottom of flushing liquor clean-out opening;
(g) reinforcement cage skeleton is made and layering installation:
Pass through master drawing, by design size, be welded and fixed disk, then on disk, bend reinforcing rib, and two-sided firm welding, then on reinforcing rib, by the main muscle radical of design, equidistantly divide good welding position, and in welding position, main muscle and reinforcing rib are welded, form reinforcement cage skeleton, then in reinforcement cage skeleton outside, by design pitch dot interlace, weld spiral stirrup, and by designing requirement size welding protective layer reinforcing bar, Deng welding, finish, after reinforcement cage skeleton moulding, the reinforcement cage skeleton of slinging, two ropes that are parallel to each other are passed to reinforcement cage skeleton bottom, and the two ends of rope are bundled on timber, untie again rope, reinforcement cage skeleton is slowly put into hole, when 2/3 of reinforcement cage skeleton enters in hole, with steel plate, reinforcement cage skeleton is supported on the substrate in aperture, the two ends of rope are bundled on timber simultaneously, then sling second reinforcement cage skeleton putting down, when second reinforcement cage skeleton and first reinforcement cage skeleton match, weld second reinforcement cage skeleton and first reinforcement cage skeleton, then the skeleton of moulding of slinging, extract steel plate out, untie rope, put into 2/3 place, hole, circulation said process welded reinforcement skeleton, when the reinforcement cage skeleton of moulding sinks to design elevation, in reinforcement cage skeleton surrounding, protection cushion block is set, finally by being welded and fixed the reinforcement cage skeleton of moulding,
(h) conduit is transferred:
According to axis, in the junction in aperture, conduit is set, and between aperture and conduit, sealing ring is set, then transfer conduit;
(i) secondary pile hole cleaning:
Adopt direct circulation method to carry out secondary pile hole cleaning;
(j) concreting:
With conduit to concreting in stake hole;
(k) reclaim casing;
(l) backfill stake hole:
Aperture backfill earth to falling after rise, then injects concrete, seals aperture.
The present invention, owing to having adopted technique scheme, has following beneficial effect:
1, adopt layer-stepping mode that reinforcement cage skeleton is put into hole, consistency from top to bottom welds one by one, completing reinforcing cage installs, having replaced traditional approach directly installs whole reinforcing cage, this mounting means can steadily be transferred reinforcing cage, avoids colliding hole wall, avoids reinforcing cage distortion, can accurately navigate to Kong Wei center again, avoid rising of steel cage or sinking when concreting simultaneously; 2, take direct circulation mode to carry out secondary pile hole cleaning, in conduit, form flow velocity, the great direct circulation of flow, carry residue, play fabulous clear hole effect.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is the structured flowchart of the bored pile construction method of a kind of reinforcement cage skeleton layering installation of the present invention.
The specific embodiment
This construction method comprises the steps:
(a) preparation of construction:
According to the constructor in Design of Construction Organization, construction equipment and material etc., carry out construction site layout, build operation platform.
(b) setting-out stake position:
According to the layout of the axis in the drawing of design and stake, utilize total powerstation to measure unwrapping wire, set up on construction ground and control net again, then control point and bench mark being carried out to cement mortar fixes, then according to controlling net, adopt transit to carry out stake position and accurately follow closely with timber setting-out ， pile center position, for precise control nails on iron nail again and accurately locates on stake top, with cross pile form, establish fender pile simultaneously.
(c) casing is made with pre-buried:
Select steel casing, with reinforcing bar, draw Zhuan Wei center, adjust casing plan-position, then bury casing underground, then use clay backfill casing surrounding.Casing plays spud pile position, as drilling guide to effect, protect aperture not cave in simultaneously, in the isolation surface water and retaining hole, water level exceeds working water level, safeguards hole wall.
Pre-buried casing will carry out in strict accordance with requiring: the casing internal diameter of 1, choosing is than the stake large 30cm in footpath; 2, casing center vertical curve and pile foundation center line overlap, and deviation is less than 40mm, and angle of inclination deviation is less than 1%; 3, casing end face 0.2m above ground level.
(d) drilling and forming hole:
Set up drilling cramp, adjust rig position, center, align piles hole, rig necessary firm supporting in place, straight, level, guarantee " car, center of turntable, stake position " center " sight alignment, accomplish not run-off the straight and displacement in construction, according to geologic report, after casing is buried underground and is located, this engineering selects GPS-20 type slewing drilling machine to creep into, on the drill bit of rig, do length mark, rig adopts revolution and impacts the mode of creeping into mutually combining, stablize and hole from top to bottom, start slowly to creep into, when substantially entering soil layer, acceleration is crept into, frequency remains on 40～45 times/min, general stroke is no more than 6m, and utilize drill bit impact mode to carry out pulping to the percussion of earth, with clear water, regulate mud balance, in construction, mud balance general control is more than 1.3, mud forms mud skin at hole wall surface in cyclic process, just formed mud off, if while running into underground obstacle in boring, should creep into reliablely and stablely to adjust starter high velocity, low pressure.
(e) retaining wall is reinforced:
Assembly pulley and electric block are first installed, and then at retaining wall place additional bar, then concreting carries out deburring reinforcing.
(f) clear hole once:
When rig is drilled into after designing requirement hole depth, lift from drill bit, with sediment at the bottom of flushing liquor clean-out opening, sediment thickness at the bottom of minimizing hole, guarantees bearing capacity of pile foundation, makes mud balance be less than 1.1 simultaneously, is conducive to concreting.
(g) reinforcement cage skeleton is made and layering installation:
Pass through master drawing, by design size, be welded and fixed disk, then on disk, bend reinforcing rib, and two-sided firm welding, then on reinforcing rib, by the main muscle radical of design, equidistantly divide good welding position, and in welding position, main muscle and reinforcing rib are welded, form reinforcement cage skeleton, then in reinforcement cage skeleton outside, by design pitch dot interlace, weld spiral stirrup, and by designing requirement size welding protective layer reinforcing bar, Deng welding, finish, after reinforcement cage skeleton moulding, select the 16T type automobile reinforcement cage skeleton of slinging, two ropes that are parallel to each other are passed to reinforcement cage skeleton bottom, and the two ends of rope are bundled on timber, untie again rope, reinforcement cage skeleton is slowly put into hole, when 2/3 of reinforcement cage skeleton enters in hole, with steel plate, reinforcement cage skeleton is supported on the substrate in aperture, the two ends of rope are bundled on timber simultaneously, then sling second reinforcement cage skeleton putting down, when second reinforcement cage skeleton and first reinforcement cage skeleton match, weld second reinforcement cage skeleton and first reinforcement cage skeleton, then the skeleton of moulding of slinging, extract steel plate out, untie rope, put into 2/3 place, hole, circulation said process welded reinforcement skeleton, when the reinforcement cage skeleton of moulding sinks to design elevation, in reinforcement cage skeleton surrounding, protection cushion block is set, , the intensity of protection cushion block should be not less than concrete strength of pile, finally by being welded and fixed the reinforcement cage skeleton of moulding.
(h) conduit is transferred:
The conduit that adopts screwed connection, arranges conduit according to axis in the junction in aperture, and between aperture and conduit, sealing ring is set, and while hanging, seasonable position is placed in the middle, and axis is straight, stablely transfers conduit, avoids scraping hitting hole wall.
(i) secondary pile hole cleaning:
Adopt direct circulation method to carry out secondary pile hole cleaning, direct circulation mode is to utilize air compressor machine compressed air, by airduct, deliver to gas slurry blender in hole, in conduit, form slurry gas mixture, blender bottom forms negative pressure, due to suction function, mud below rises, and under the synergy of the momentum of calming the anger, constantly mend slurry, continue to rise, rise to after the mud of blender and gas form gas pulp mixture and continue to rise, thereby form flow velocity, the great direct circulation of flow, carry residue, play fabulous clear hole effect.
(j) concreting:
With diameter 20cm conduit, to concreting in stake hole, concreting need be controlled Essentials for quality control: 1, before concreting at the bottom of reply hole at the bottom of elevation, conduit mouth elevation, mud property index and precipitation thickness detect; 2, concreting should not stop by continuous placing, when concrete face approaches reinforcing cage position, should slow down speed of perfusion, prevents rising of steel cage; 3, after first batch of concrete has been built, the conduit depth of burying must not be less than 1m, in normal casting process, should someone measure, and removes in time conduit, and buried depth should be controlled at 4～6m.
(k) reclaim casing:
After concreting completes, reclaim casing, reduce construction cost.
(l) backfill stake hole:
Aperture backfill earth to falling after rise, then injects concrete, seals aperture.
This construction method progress is fast, duration is short, be applicable to various weak soils, sandy soil, clay class composite soil, drilling-machine shifter, peace is torn open conveniently, work plane is little, be applicable to place wide, in work progress, the main layer-stepping mode that adopts is put into hole by reinforcement cage skeleton simultaneously, consistency from top to bottom welds one by one, completing reinforcing cage installs, having replaced traditional approach directly installs whole reinforcing cage, this mounting means can steadily be transferred reinforcing cage, avoid colliding hole wall, avoid reinforcing cage distortion, can accurately navigate to Kong Wei center again simultaneously, avoid rising of steel cage or sinking when concreting, also take direct circulation mode to carry out secondary pile hole cleaning, in conduit, form flow velocity, the great direct circulation of flow, carry residue, play fabulous clear hole effect.This construction method has been given prominence to high science and feasibility.
This construction method safety measure:
1, as far back as personnel's medical fitness, the disease of operation without prejudice and physiological defect, and through professional training, examine qualified obtaining after operation card, can take appointment with certificate.
2, operating personnel, in operation process, should concentrate one's energy, and proper operation must not be left without authorization work position or by machinery, give other persons without license and handle, and forbids unrelated person to enter in the operating room of operating area.
3, plant equipment should correctly be used by the requirement of its performance, reduces the plant equipment of safety device or safety device inefficacy and must not use.
4, operator should observe the relevant maintenance regulation of plant equipment, conscientiously carries out in time maintenance works at different levels, often keeps mechanical serviceable condition.
5, automatic alarm, the recoil simulator such as the automatic controls in rigorous dismounting plant equipment and various safety caging device and monitoring indicator table, alarm buzzer, the eliminating of its debugging and fault should be responsible for carrying out by professional.
6, carry out the machinery of many classes of operations, should carry out shift system, conscientiously fill in the record of relieving, succeed personnel on inspection mechanical errorless after, can carry out work.
7, site operation person in charge should be mechanical work provides the indispensable condition such as road, water power, machinery or stopping spot, and eliminates mechanical work is had and hindered or unsafe factor, and night work should arrange sufficient illumination.
8, machinery must rationally use according to technical performance supporting capacity and the service condition proper operation of delivery test manual regulation, rigorous overload operation or expand arbitrarily the scope of application.
9, plant equipment must not be moved in spite of illness, should first shutdown inspection when discovery in service is undesired, after fixing a breakdown, can use.
10, forbid to operate against regulations, the effect order of all these rules of violation, after operating personnel should first give reasons, can refuse to carry out, and because the people that issues an order forces all accidents of operating against regulations and causing, by issuing an order, people bears.
11, new machine, through the machinery of overhaul or technological transformation, must be tested and test running by the requirement of shop instructions.
While 12, using machinery and safety in production to conflict, must first obey safety requirements.
13, the lubrication oil (fat) that machine maintenance is used, should meet kind and the trade mark of product description defined, and on time, quarterly, by matter, increase or change.
14, when plant equipment has an accident or during not accomplished serious accident, must rescue in time, keep the scene intact, and report leader and relevant department listen marquis to process immediately, the accident of urging should be processed by the principle of " four do not let slip ".
15, man-machine fixing, determine machine and determine people, operating personnel must do the regular servicing of plant equipment well, before start, after shutdown, do well to clean, lubricate, adjustment, firm and anticorrosive work, often keep the kilter of plant equipment.
16, all electromechanical equipments are from After Hours cutting off the electricity supply.
This construction method environmental practice:
1, job site keeps good construction environment and construction order, does a good job of it on-the-spot appearance management, defines construction equipment and parks place, and plant equipment, material are parked neatly.
2, guarantee job site the coast is clear, smooth, clean and tidy, main builder's road carries out necessary maintenance work.
3, project management department's construction of listing, lays engineering billboard, work written instructions board, and safety warning-panel etc., the content that makes to construct is very clear, rational and orderly.
4, after completion, carry out on request the cleaning work of job site, accomplish to have lived, expect clearly, place is clear.
5, strictly control the pollution of Construction on Environment, scene environment pollution is around reduced to minimum.
6, after completion, in time job site is cleared up, made great efforts to recover the looks before use, infringement is reduced to minimum degree.
These are only specific embodiments of the invention, but technical characterictic of the present invention is not limited to this.Anyly take the present invention as basis, for solving essentially identical technical problem, realize essentially identical technique effect, done ground simple change, be equal to and replace or modification etc., be all covered by among protection scope of the present invention.
Claims (1)
1. the bored pile construction method that reinforcement cage skeleton layering is installed, is characterized in that comprising the steps:
(a) preparation of construction:
According to the constructor in Design of Construction Organization, construction equipment and material etc., carry out construction site layout, build operation platform;
(b) setting-out stake position:
According to the layout of the axis in the drawing of design and stake, utilize total powerstation to measure unwrapping wire, set up on construction ground and control net again, then control point and bench mark being carried out to cement mortar fixes, then according to controlling net, adopt transit to carry out stake position and accurately follow closely with timber setting-out ， pile center position, for precise control nails on iron nail again and accurately locates on stake top, with cross pile form, establish fender pile simultaneously;
(c) casing is made with pre-buried:
Select steel casing, with reinforcing bar, draw Zhuan Wei center, adjust casing plan-position, then bury casing underground, then use clay backfill casing surrounding;
(d) drilling and forming hole:
First set up drilling cramp, adjust rig position, center, align piles hole, then according to geologic report, after casing is buried underground and located, on the burr-drill of rig, do length mark, rig adopts revolution and impacts the mode of creeping into mutually combining, and stablizes and holes from top to bottom, and utilize drill bit impact mode to carry out pulping to the percussion of earth, with clear water, regulate mud balance, form mud off;
(e) retaining wall is reinforced:
Assembly pulley and electric block are first installed, and then at retaining wall place additional bar, then concreting carries out deburring reinforcing;
(f) clear hole once:
When rig is drilled into after designing requirement hole depth, lift from drill bit, with sediment at the bottom of flushing liquor clean-out opening;
(g) reinforcement cage skeleton is made and layering installation:
Pass through master drawing, by design size, be welded and fixed disk, then on disk, bend reinforcing rib, and two-sided firm welding, then on reinforcing rib, by the main muscle radical of design, equidistantly divide good welding position, and in welding position, main muscle and reinforcing rib are welded, form reinforcement cage skeleton, then in reinforcement cage skeleton outside, by design pitch dot interlace, weld spiral stirrup, and by designing requirement size welding protective layer reinforcing bar, Deng welding, finish, after reinforcement cage skeleton moulding, the reinforcement cage skeleton of slinging, two ropes that are parallel to each other are passed to reinforcement cage skeleton bottom, and the two ends of rope are bundled on timber, untie again rope, reinforcement cage skeleton is slowly put into hole, when 2/3 of reinforcement cage skeleton enters in hole, with steel plate, reinforcement cage skeleton is supported on the substrate in aperture, the two ends of rope are bundled on timber simultaneously, then sling second reinforcement cage skeleton putting down, when second reinforcement cage skeleton and first reinforcement cage skeleton match, weld second reinforcement cage skeleton and first reinforcement cage skeleton, then the skeleton of moulding of slinging, extract steel plate out, untie rope, put into 2/3 place, hole, circulation said process welded reinforcement skeleton, when the reinforcement cage skeleton of moulding sinks to design elevation, in reinforcement cage skeleton surrounding, protection cushion block is set, finally by being welded and fixed the reinforcement cage skeleton of moulding
(h) conduit is transferred:
According to axis, in the junction in aperture, conduit is set, and between aperture and conduit, sealing ring is set, then transfer conduit;
(i) secondary pile hole cleaning:
Adopt direct circulation method to carry out secondary pile hole cleaning;
(j) concreting:
With conduit to concreting in stake hole;
(k) reclaim casing;
(l) backfill stake hole:
Aperture backfill earth to falling after rise, then injects concrete, seals aperture.
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| CN201310613695.6A CN103615001A (en) | 2013-11-27 | 2013-11-27 | Bored pile construction method for reinforcing cage framework layered installation |
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