CN109457694A - A kind of variable diameters steel reinforcement cage enlarged footing anti-floating or pressure bearing pile and construction in conjunction with mixing pile or rotary churning pile - Google Patents
A kind of variable diameters steel reinforcement cage enlarged footing anti-floating or pressure bearing pile and construction in conjunction with mixing pile or rotary churning pile Download PDFInfo
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- CN109457694A CN109457694A CN201811533682.7A CN201811533682A CN109457694A CN 109457694 A CN109457694 A CN 109457694A CN 201811533682 A CN201811533682 A CN 201811533682A CN 109457694 A CN109457694 A CN 109457694A
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/14—Sealing joints between adjacent sheet piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Based on variable diameters steel reinforcement cage enlarged footing anchor pole anti-floating or pressure bearing pile, including rotary churning pile or mixing pile in conjunction with mixing pile or rotary churning pile；Being equipped with variable diameters steel reinforcement cage in the construction hole that the lap-joint of the stake core or stake of rotary churning pile or mixing pile is arranged or directly drilling, hole is skeleton using slip casting or concrete perfusion as the Composite Bolt of pile body or pressure bearing pile.Variable diameters steel reinforcement cage enlarged footing anchor pole prepares the enlarged footing Composite Bolt (or pressure bearing pile) formed in conjunction with mixing pile construction or high-pressure rotary jet grouting pile, even existing anti-volt campshed cooperation is as antiseepage barricade it is also possible to as anti-floating tension anchor pole or pressure-bearing pile foundation.
Description
Technical field
The present invention relates to the variable diameters steel reinforcement cages that the improvement of mixing pile or rotary churning pile, especially mixing pile or rotary churning pile combine
Enlarged footing anti-floating or pressure bearing pile (including anchor pole) and engineering method.
Background technique
Rotary churning pile is a kind of existing stake and with ready-made construction method.Rotary churning pile will be closed using drilling equipped with speciality
Predetermined position is arrived under the Grouting Pipe of golden nozzle, cement grout is passed through to the special spray head of drilling rod end using high-pressure pump, with high speed
Level sprays into the soil body, cuts soil layer by the impact force of liquid, while drilling rod one side is rotated with certain speed (20r/min),
One face low speed (15~30cm/min) is promoted slowly, and the soil body and cement slurry is made to be thoroughly mixed solidification, high pressrue jet apparatus slurry
Liquid sufficiently mixes with the slurries of injection after removing the soil body and forms column (whirl spraying) circle cross section stake.Swaying-jet-grouting, top spray are also all high
The spray pattern of grouting is pressed, but identical with the form of construction work of whirl spraying, therefore not independent list is into pile foundation.Rotary churning pile formation has
The cylinder induration (i.e. rotary churning pile) of some strength (0.5~8.0MPa), so that ground be made to be reinforced.The characteristics of rotary churning pile
It is: the shearing strength of ground can be improved；Can be using slim hole whirl spraying at 8~10 times of major diameter induration bigger than hole, it can
For existing building foundation stabilization without disturbing the soil body nearby；Construction noise is low, with small vibration；It can be used for any soft layer,
Controllable reinforcing scope；Equipment is simpler, light, and mechanization degree is high；Material source is wide, and easy construction, speed is fast, at low cost
Deng.High-pressure rotary jet grouting pile is mixed cement slurry penetrating soil layer with the soil body with the nozzle of high-pressure rotary, and the cement for forming lap connection adds
Solid.Construction area is few, with small vibration, noise is lower, but is easy pollution environment, and higher cost cannot make to spray for special
The soil property of grout cures should not use.Single tube: spraying cement slurries, stake diameter is minimum, and stake diameter is general≤0.6m, it is commonly used in pine
It dissipates, in slightly close layer of sand, the general < 200kg/m of cement consumption, normal construction speed is generally in 20cm/min.It is two-tube: spraying cement
Slurries and air, the general 0.6m~0.8m of stake diameter, be commonly used in in close layer of sand, the general < 300kg/m of cement consumption is normally applied
Work speed is generally in 10~20cm/min.
Building enclosure high-pressure rotary jet grouting pile is suitable for processing mud, muck soil, stream modeling, soft modeling or plastic cohesive soil, element and fills out
The soil layers such as soil, silt, sand, gravelly soil, and work as and contain more large-size rock fragment, a large amount of plant roots and stems in soil layer or have more
Organic matter and excessive groundwater velocity when, then need prudent to determine its applicability using or according to site test results.?
In construction method, single pipe method, dual tube method, tri-tube method can be respectively adopted；Can be divided into again on spray pattern whirl spraying, fixed spray and
Three kinds of swaying-jet-grouting, reinforcement depth such as is generally higher than 5.0m. it is fast with pile-forming speed, high-efficient, construction is without friction, noiseless at the spies
Point；But cement slurry loss (waste) is more in construction, will cause a certain range of construction environment pollution.Rotary churning pile (reinforcing body) can
For existing building and new building foundation stabilization, the soil layer of the engineerings such as deep basal pit, subway is reinforced or waterproof.And in foundation pit enclosure
It is mostly used in the form of fixed spray or swaying-jet-grouting separately as antiseepage curtain wall in engineering, or cooperates (do stake between directional swing spray) with anti-volt campshed
It is used as antiseepage barricade.
Mixing pile is also a kind of existing stake and with ready-made construction method；Deep-mixed pile is commonly referred to as mixing pile,
Also known as deep cement-mixed pile, suitable for handle normal consolidation mud and muck soil, plain fill, silt, cohesive soil and
The soil layers such as the loosening sand without flowing underground water.Reinforcement depth is generally higher than 5.0m. in construction method, uses reinforcing material by it
The state of material can be divided into slurries paddling process (wet process, i.e. this detailed rules and regulations deep water mud paddling process) and powder paddling process (dry method) two
Kind construction type.According to the stress of sitework geological conditions and superstructure load requirement and cement earth pile, deep layer is stirred
The soil cement reinforcing body for mixing stake formation, can be used as base pit engineering and goes along with sb. to guard him barricade, seepage proof curtain；The composite foundation vertically carried；Greatly
Volume cement stabilized soil etc..
Deep-mixed pile is to stir stratum in the method for machinery rotation, while pouring into cement grout or spraying into cement powder,
Pile body is thoroughly mixed to form with the soil body.The shape of deep-layer stirring reinforcing body can be divided into column, wall-like, grid-like and blocky etc..Its
In, cylindrical strengthening body form is chiefly used in the composite foundation of reinforcement of soft soil；Wall-like, grid-like reinforcing body form, mainly as deep base
What hole was excavated goes along with sb. to guard him a grade wall, seepage proof curtain；Blocky reinforcing body form, it is big to be chiefly used in superstructure Unit area loading, unevenly
The stringent structures ground of settlement Control.But no matter that reinforcing body form, Deep Mixing Piles Construction all have pile-forming speed
Fastly, the features such as high-efficient, at low cost, without friction, noiseless, pollution-free.
Above two stake belongs to the method and technique of basement process, further includes powder spray Jiao method: use dry cement as
The Deep Mixing Method of curing agent.Abbreviation dry method.Deep mixing method: use cement slurry as the Deep Mixing Method of curing agent.
Abbreviation wet process.Soil cement Jiao mix process: it is mechanical by special deep-layer stirring using cement as the host agent of curing agent, by curing agent
With foundation soil action of forced stirring, make weak soil scleroma at the basement process side of the pile body with globality, water stability and some strength
Method.The prior art may not make in pressure bearing pile and tension anchor pole and its preparation generally.
Rotary churning pile or mixing pile include the rotary churning pile or mixing pile of single tube, dual tube method, triple pipe constructions；Rotary churning pile stirs
It mixes the stake core of stake or the lap-joint construction hole of stake or variable diameters steel reinforcement cage and rod assembly is transferred in direct drilling → reaming is constructed →
→ slip casting or concrete perfusion → Composite Bolt (or pressure bearing pile) pile.
Summary of the invention
Object of the present invention is to propose a kind of variable diameters steel reinforcement cage enlarged footing anchor pole and work in conjunction with mixing pile or rotary churning pile
The variable diameters steel reinforcement cage enlarged footing anchor pole or pile foundation that method, mixing pile or rotary churning pile combine become powerful tension anchor pole anti-floating
Or pressure bearing pile.
The technical scheme is that variable diameters steel reinforcement cage enlarged footing anchor pole anti-floating in conjunction with mixing pile or rotary churning pile or
Based on pressure bearing pile, including rotary churning pile or mixing pile；It is applied what the lap-joint of the stake core or stake of rotary churning pile or mixing pile was arranged
Work hole directly drills, and it is skeleton using slip casting or concrete perfusion as the Composite Bolt of pile body that variable diameters steel reinforcement cage is equipped in hole
Or pressure bearing pile.
A kind of variable diameters steel reinforcement cage enlarged footing anchor pole anti-floating or pressure-bearing pile work method in conjunction with mixing pile or rotary churning pile, including
Following steps: fixed pile, stake machine in place, mixing pile or Construction of High Pressure Jet Grouting Pile and reserved anchor pole or pressure-bearing pile driving construction hole or straight are surveyed
Connect drilling, the lower part reaming in hole construction, decentralization variable diameters steel reinforcement cage and rod assembly, reaming at variable diameters steel reinforcement cage release become larger
As the diameter steel reinforcement cage of design size, in Large-size rebar cage and entire construction hole slip casting or concrete perfusion, variable diameters
Composite Bolt or pressure bearing pile of the steel reinforcement cage stake in conjunction with mixing pile or high-pressure rotary jet grouting pile.
It is including the overlap joint of the stake core or stake of single tube, dual tube method, triple tube or the rotary churning pile of multitube construction or mixing pile
Locate the construction hole of setting or directly drills.
In the interval (lap-joint) of dual tube method high-pressure rotary jet grouting pile: in the interval of dual pipe high-pressure rotary jet grouting pile, or
The interval setting construction hole of two adjacent dual pipe high-pressure rotary jet grouting piles directly drills.
Single tube, dual tube method, the rotary churning pile of triple pipe constructions or mixing pile stake core initial set front and back during carry out construction change
Diameter steel reinforcement cage enlarged footing Composite Bolt or pressure bearing pile.
Reserved anchor pole or pressure-bearing pile driving construction hole after the completion of mixing pile construction or high-pressure rotary jet grouting pile, have some strength to pile body
Anchor pole or the reaming of pressure bearing pile bottom end are carried out afterwards, transfer variable diameters steel reinforcement cage and rod assembly, it is compound that slip casting or perfusion fill concrete
Anchor pole or pressure bearing pile stake pile.
The utility model has the advantages that rotary churning pile (reinforcing body) and mixing pile before the present invention are with can be used for existing building and new building
Base is reinforced, and the soil layer of the engineerings such as deep basal pit, subway is reinforced or waterproof.Rotary churning pile is in Foundation Pit Support Engineering mostly to determine spray or swaying-jet-grouting
Form is used separately as antiseepage curtain wall, or is used as antiseepage barricade to use with anti-volt campshed cooperation (do stake between directional swing spray).But
Because existing rotary churning pile (reinforcing body) and mixing pile are far not enough to the anchor pole and pile foundation as stress in intensity, and solution of the present invention
Determined this problem, by mixing pile, rotary churning pile operation, realize to mud and muck soil, plain fill, silt, cohesive soil and
The processing of the weak soils such as the loosening sand without flowing underground water makes its scleroma at globality, water stability and some strength
Pile body soil layer.The enlarged footing that the preparation of variable diameters steel reinforcement cage enlarged footing anchor pole is formed in conjunction with mixing pile construction or high-pressure rotary jet grouting pile is multiple
It closes anchor pole (or pressure bearing pile), even existing anti-volt campshed cooperation (doing directional swing spray between stake) is used as antiseepage barricade simultaneously,
It can be used as anti-floating tension anchor pole or pressure-bearing pile foundation.Construction cost is low, and effect is good.
Detailed description of the invention
Fig. 1 is bored concrete pile schematic diagram of the present invention；In bored concrete pile itself a, bored concrete pile plus variable diameters steel reinforcement cage b, bored concrete pile become
Diameter steel reinforcement cage composite pile c.
Fig. 2 uses engineering process schematic diagram of the present invention in mixing pile for the present invention；Step explanation: step in Fig. 2: positioning a,
Stir sinking b, whitewashing stirring rises c, d is completed in whitewashing stirring, injecting cement paste initial set transfers to steel pipe e, machinery or high-pressure rotary-spray under
Portion's reaming f, sinking variable diameter steel reinforcement cage and anchor pole g, variable diameter steel reinforcement cage expand mechanism opening h, variable diameter steel reinforcement cage is expanded to design ruler
Very little i, slip casting or concrete perfusion j.
Fig. 3 is present invention perfusion stirring or high-pressure rotary jet grouting pile mechanical flow diagram；
Fig. 4 is mixing pile mechanical flow diagram of the present invention.
Specific embodiment
Embodiment: variable diameters steel reinforcement cage enlarged footing anchor pole or pressure bearing pile in conjunction with mixing pile or rotary churning pile are including single
The construction hole of lap-joint's setting of pipe, the stake core of dual tube method, the rotary churning pile of triple pipe constructions or mixing pile or stake is directly bored
Hole constructs through reaming, transfers variable diameters steel reinforcement cage and rod assembly, slip casting or concrete perfusion, Composite Bolt (or pressure bearing pile)
Pile.
Variable diameters steel reinforcement cage and rod assembly → slip casting are transferred in construction hole or direct drilling → reaming is constructed → or perfusion is mixed
Solidifying soil → Composite Bolt (or pressure bearing pile) pile.
It is in place to survey fixed pile → stake machine for variable diameters steel reinforcement cage enlarged footing anchor pole and engineering method in conjunction with mixing pile or rotary churning pile
The lower part reaming in → mixing pile or Construction of High Pressure Jet Grouting Pile and reserved anchor pole (or pressure bearing pile) construction hole or direct drilling → hole is applied
The release of variable diameters steel reinforcement cage is at Large-size rebar cage → in major diameter at work → decentralization variable diameters steel reinforcement cage and rod assembly, reaming
Steel reinforcement cage and entire construction hole slip casting or concrete perfusion → variable diameters steel reinforcement cage stake are in conjunction with mixing pile or high-pressure rotary jet grouting pile
Composite Bolt (or pressure bearing pile) pile.
It is including stake core or the lap-joint's setting of stake of single tube, dual tube method, the rotary churning pile of triple pipe constructions or mixing pile
Construction hole or directly drill.
The interval (lap-joint) of dual tube method high-pressure rotary jet grouting pile: both can in the interval of dual pipe high-pressure rotary jet grouting pile,
Can also in the interval of two adjacent dual pipe high-pressure rotary jet grouting piles, single tube, dual tube method, triple pipe constructions rotary churning pile or
The stake core initial set left and right time of mixing pile carries out construction variable diameters steel reinforcement cage enlarged footing Composite Bolt (or pressure bearing pile).
Reserved anchor pole (or pressure bearing pile) construction hole either after the completion of mixing pile construction or high-pressure rotary jet grouting pile, has to pile body
Anchor pole (or pressure bearing pile) bottom end reaming is carried out after some strength, variable diameters steel reinforcement cage is transferred and pull rod is total, and slip casting or perfusion fill mixed
Solidifying soil Composite Bolt (or pressure bearing pile) stake pile displacement.
The construction skill of variable diameters steel reinforcement cage enlarged footing Composite Bolt (or pressure bearing pile) stake in conjunction with mixing pile or rotary churning pile
Art measure, quality assurance measure and construction procedure are as follows:
(1), engineering survey
1. doing control stake, pilot measurement level: control point theodolite, the level provided by surveyor according to construction unit is surveyed
It puts, it is ensured that the bearing accuracy of excavation of foundation pit, and current natural ground elevation is measured, and make visible marking, really
Protect it is deep stir that the embedded depth of stake, stake is long and stake top absolute altitude meets design requirement, control point and bench mark need to make unwrapping wire figure.
2. measuring stake position: pressing figure measuring with instrument and steel ruler on working face by surveyor, and hammered into bamboo chip or timber
As label in soil, it is ensured that the lap of splice of adjacent studs meets design requirement.
(2), place cleaning barrier
Place cleaning barrier is answered to remove brickbat, stone when before going into operation, to avoid the deep construction for stirring stake is influenced.
(3), mixing pile or corresponding stake machine when Construction of High Pressure Jet Grouting Pile are in place
1., the welding of mixing pile or Construction of High Pressure Jet Grouting Pile drilling rod, stirring pipe must be secured, guarantee concentricity, must not have
Bending asks management to measure the length of stirring pipe, length of blade after being welded into, the data of measurement to meet design embedded depth, stake it is long,
Etc. fill in receipt after technical requirements.
2., the installation of stake machine must be horizontal, firm.Machine bottom must be leveled up with sleeper, be padded, and sleeper uses 50cm × side 50cm
Wood.Rack and stirring pipe must be vertical, and the stirring-head align piles heart, pile position deviation≤50mm, degree control is within 1%.It stirs
It mixes the red paint of Guan Shangyong and makes label to ensure that embedded depth meets design requirement, accuracy, the verticality of stake of stake position meet rule
The requirement of model, it is ensured that the overlap joint of adjacent studs is tight, meets 200mm, accomplishes non-leakage.
3., feed pipe for mortar must use high-pressure rubber pipe, must not be damaged, joint is with 8#Iron wire, which must not tighten, to be leaked.
(4), cement slurry is prepared: cement mixed ratio 15%, the ratio of mud 0.50.It can be prepared according to design requirement.
1., cement be 42.5 grades of general silicon, must simultaneously provide the quality certificate of the batch when providing cement.After cement is marched into the arena
Necessary sampling inspection can come into operation after stability and intensity are qualified, and cement should be in safe keeping after marching into the arena, and must not make moist change
Matter agglomeration.
2., strictly by 15% additive ratio control cement consumption, prepare cement slurry by 0.50 ratio of mud.It must be stringent
Single pile cement consumption is controlled, must not put, to ensure the requirement of the compression strength, barrier properties of soil cement, be put after the screen to filtrate less
Enter and continue to stir in slurry storing tank, cement slurry must not precipitate isolation.
(5), stir and whitewash
1., slurry pump pump pressure, defeated slurry amount, mortar should be demarcated before construction reach the mouth spray time through feed pipe for mortar and promote speed
The construction parameters such as degree, and carry out piling experiment.
2., mixing pile stirring when the speed sunk be 0.8m/min, make to be stirred soil layer and sufficiently shred, stir sink down into design in advance
After depth, i.e., with reverse agitating function while promotion of whitewashing, promotion speed is 0.5m/min, is thoroughly mixed cement slurry and the soil body
Uniformly, it is ensured that the intensity of pile body.Sinking is stirred again and whitewashing stirring promotion is identical as just control method is stirred.
High-pressure rotary jet grouting pile spray pressure: 20Mpa；Promote speed: 0.2m/min.High pressure jet grouting carries out from bottom to top,
When Grouting Pipe cannot once promote completion and need to unload pipe in several times, unloading the lap of splice sprayed after pipe cannot be less than 10cm.Rotation
During spraying pile driving construction, the pressure of cement mixed weight and cement flow should be rationally determined according to construction site.
3., can stir promotions after confirmation whitewashing, whitewashing must not be interrupted halfway.
4., reserved anchor pole (or pressure bearing pile) constructs hole after the completion of mixing pile construction or high-pressure rotary jet grouting pile, have one to pile body
Anchor pole (or pressure bearing pile) bottom end reaming is carried out after determining intensity, variable diameters steel reinforcement cage is transferred and pull rod is total, slip casting or perfusion fill coagulation
Native Composite Bolt (or pressure bearing pile) stake pile displacement.
5., post-stressed tensioning fixation can be carried out according to design requirement anchor pole (or pressure bearing pile) rod piece.
6., every pile should make detailed construction note, record cement consumption, promotes record and pumping at additive amount
Slurries or concrete time etc..
Composite Bolt (or pressure bearing pile) construction method [two]
Composite Bolt (or pressure bearing pile) of the anchor pole (or pressure bearing pile) in conjunction with bored concrete pile
The construction technology of Composite Bolt (or pressure bearing pile) stake:
(i), Composite Bolt (or pressure bearing pile) construction and quality assurance measure of the anchor pole (or pressure bearing pile) in conjunction with bored concrete pile
1, Composite Bolt (or pressure bearing pile) pile constructing process of anchor pole (or pressure bearing pile) in conjunction with bored concrete pile
The positioning of stake position is accurately carried out according to stake bit plan, by design aperture, hole depth using engineering driller rotary drilling, rotation
Dig drilling machine, long-spiral drilling machine, other mechanically or manually pore-formings.
Using first time borehole cleaning is carried out after mechanical hole building immediately, steel reinforcement cage is then placed by drilling machine (or crane) and pull rod is total
At and conduit, then using the direct circulation of 3PNL slush pump carry out second of borehole cleaning, it is ensured that bottom hole sediment be not more than 10cm, using conduit
Underwater grouting pours concrete, cement mortar, cement slurry or lapidation grouting pile-forming, waste pulp discharged in drilling and concrete pouring process
Input blowdown vehicle, transported outward by dedicated slurry transport truck, ensure in this way it is high-quality, efficiently complete construction task.
2, Composite Bolt (or pressure bearing pile) pile construction technology measure of the anchor pole (or pressure bearing pile) in conjunction with bored concrete pile, quality are protected
Card measure
Composite Bolt (or pressure bearing pile) stake category concealed work will be pressed strictly in work progress for its technological characteristics of construction
Process quality index, carries out process self-test, handover inspection, reinspection system, and emphasis does a good job of it measurement and positioning, pore-forming and borehole cleaning, a steel
Muscle cage and pull rod always place, the technology measure of catheter installation and secondary pile hole cleaning and the processes such as concrete stirring and perfusion.
(1) measurement and positioning: J2 theodolite, S3 level and 50m steel tape measuring are used.
1. all measurement control points will be located at not by the region of Influence of Pile Foundation and fixation, to be protected in the construction process
And often control point is corrected.The Control Survey Triangulation Network for Construction set and level control point are surveyed according to construction site, surveyor presses stake
Bit plan carries out the setting-out of stake position and the measurement of aperture absolute altitude, during measuring stake position, to have inspection step by step, pay special attention to check
The operation of theodolite and the precision set apart from survey.
2. casing plays spud pile position, casing diameter should be greater than 100mm or more, buried depth 1.5m or so than design aperture.
When embedded casing, the verticality of casing is paid attention to, tamped between casing and hole wall with element soil, keep casing firm, straight.Check that casing buries
If stability, verticality and centering, check casing center and stake position center it is whether consistent, deviation is within 2cm.
3. drilling machine must consolidate in place, perpendicular to the ground, center line should be directed at casing center to drilling cramp, make drilling tool center, shield
Cylinder center and stake position center are all a line, and deviation guarantees within 2cm.
(2) pore-forming and a borehole cleaning: engineering driller direct circulation drilling and forming hole.
1. specifying pile installation, technical parameter and construction precautions after every preparation is ready before pore-forming, drill
Poured support stake, which will be implemented to jump because stake spacing is small, beats.
2. measuring each board drilling tool length with steel ruler before spudding in, hole depth is calculated according to elevation of borehole, design bottom hole absolute altitude.
When whole hole, remaining ruler on correct measurement machine is long to control stake, reaches design requirement.
3. borer frame is fixed using the high drilling rod of the cage type bit and straightness of good concentricity, to reduce because of drill bit
The oversize for shaking and generating.
4. drilling the incipient stage, when drilling, will gently press slow play, slow-speed of revolution drilling, can fast drilling after 10m.
5. adjusting mud property according to strata condition, high density, high viscosity mud off are used in upper soil horizon, is prevented
Sandy soil collapses hole.
6. to be frequently checked drill head frame pulley blocks, turntable and drill bit in drilling process whether in same vertical line, accomplish
Diligent correction, such as finds hole deviation, timely well straightening cleaning bottom of hole.
7. carrying out a borehole cleaning after pore-forming immediately, drilling tool above mentioned into 10cm or so when a borehole cleaning turns round at a slow speed and send slurry, mud
Specific gravity is starched in 1.25g/cm3Left and right, viscosity 22 " -26 ", a borehole cleaning is not until having spare, landwaste to return out in mud.
(3) fabrication of reinforcing cage
Fabrication of reinforcing cage according to design drawing technical requirements (type of arrangement of reinforcement, rank, diameter, cage length, radical, spacing,
Main reinforcement be staggered distance etc.) merogenesis processing.Fabrication of reinforcing cage forms on production rack, reinforces first by design requirement production molding
Stirrup puts on main reinforcement position on stirrup, while also putting on stirrup position by design requirement in main reinforcement, then on station
Two Reinforced Hoop rib rings are placed in main reinforcement length range, the quantity of steel reinforcement cage main reinforcement welding point in the same plane must not surpass
The 50% of main reinforcement radical is crossed, adjacent two connector is staggered distance for >=35d, by main reinforcement (being staggered), the righting of reinforcing rib mutual alignment
Stirrup is allowed to overlap molding with part main reinforcement, then Reinforced Hoop rib ring, main reinforcement is put in place welding fabrication, finally puts on spiral shell
Stirrup is revolved, is separated uniformly by spiral bar marked in main reinforcement position, and welded by design requirement point.
Fabrication of reinforcing cage tolerance:
Main reinforcement spacing: ± 10mm
Stirrup spacing or spiral bar screw pitch: ± 20mm
Steel reinforcement cage diameter: ± 10mm
Length of reinforcing cage: ± 50mm
(4) steel reinforcement cage and anchor pole (or pressure bearing pile) body of rod assembly are placed
1. steel reinforcement cage and anchor pole (or pressure bearing pile) body of rod are placed after pore-forming and a borehole cleaning quality examination are qualified,
Steel reinforcement cage will prevent deformation, bending in the handling process.Check type, arrangement of reinforcement, straightness and the lifting point intensity of steel reinforcement cage.
2. steel reinforcement cage and anchor pole (or pressure bearing pile) body of rod assembly enter hole placement, operation is steady, right when in tripping in hole
Quasi- hole center and righting are put into slowly after keeping vertical.Forbid to collide hole wall when hanging.
3. steel reinforcement cage and anchor pole (or pressure bearing pile) body of rod are always placed, steel reinforcement cage is placed and aperture welding quality is by Quality Inspector
It rechecks and handles hidden project visa.
(5) catheter installation and secondary pile hole cleaning
1. conduit is made of steel pipe, the joint of conduit is screwed connection, and leakproofness well must not leak.
2. in catheter placement procedure, joint screw thread will be tightened.
3. conduit carries out secondary pile hole cleaning after transferring to bottom hole.
4. must carry out secondary pile hole cleaning before concrete pouring, bored concrete pile uses slush pump direct circulation borehole cleaning.
5. secondary pile hole cleaning will ensure that bottom hole sediment thickness within 10cm, and is able to maintain wall stability, secondary pile hole cleaning mud
Specific gravity is starched in≤1.25g/cm3, viscosity 18 " -22 "
6. must be poured in 30 minutes after secondary pile hole cleaning is qualified, measured hole bottom sediment again or clear is otherwise needed
Hole.
(6) it is perfused
1. bored concrete pile is perfused using concrete, cement bonded sand or cement slurry, cement mortar.
2. must have concrete ratio report, cement quality certificate, cement and sand, Shi Fujian return on qualification before concrete pouring.
Make conduit bottom end apart from bottom hole 50cm or so 3. conduit above mentions when pouring, it can be suitable convenient for mud in water proof bolt and conduit
Benefit discharge.
4. water proof bolt will have good water isolating and can pass through conduit.
5. calculating beginning quantity when first watering, guarantee 1.0m or more in first watering rear tube bottom end embedment concrete.
6. filling process will be carried out continuously, concrete face lifting height is measured in time, promotes conduit in time, accomplish that diligent survey frequently is pulled out,
Keep pipe laying depth in 2-6m.
7. more than stake top absolute altitude superfilled height is greater than 5% and no less than 1m of pile body length to ensure stake top concrete quality.
8. after every pile perfusion, measuring concrete top mark height by Quality Inspector, calculating fullness coefficient, then check and accept and handle hidden
Project visa.
9. post-stressed tensioning fixation can be carried out according to design requirement anchor pole (or pressure bearing pile) rod piece.
10. bored concrete pile does one group of test block daily, indicates and send laboratory test resistance to compression after pile No. and making date, mark are supported 28 days
Intensity.
(7) mud outward transport
Waste pulp discharged in drilling and concrete pouring process input pollution discharge pond, are thrown aside by the outward transport of dedicated slurry transport truck in slag
Soil does the place of agreement.
Claims (6)
1. variable diameters steel reinforcement cage enlarged footing anchor pole anti-floating or pressure bearing pile in conjunction with mixing pile or rotary churning pile, including rotary churning pile or stir
Based on mixing stake；It is characterized in that rotary churning pile or mixing pile stake core or stake lap-joint setting construction hole or directly brill
Hole, it is skeleton using slip casting or concrete perfusion as the Composite Bolt of pile body or pressure bearing pile that variable diameters steel reinforcement cage is equipped in hole.
2. a kind of variable diameters steel reinforcement cage enlarged footing anchor pole anti-floating or pressure-bearing pile work method in conjunction with mixing pile or rotary churning pile, feature
It is to include the following steps: that surveying fixed pile, stake machine in place, mixing pile or Construction of High Pressure Jet Grouting Pile and reserved anchor pole or pressure bearing pile applies
Variable diameters steel reinforcement cage at work hole or directly drilling, the lower part reaming in hole construction, decentralization variable diameters steel reinforcement cage and rod assembly, reaming
Release becomes larger as the diameter steel reinforcement cage of design size, in Large-size rebar cage and entire construction hole slip casting or perfusion coagulation
Soil, Composite Bolt or pressure bearing pile of the variable diameters steel reinforcement cage stake in conjunction with mixing pile or high-pressure rotary jet grouting pile.
3. variable diameters steel reinforcement cage enlarged footing anchor pole anti-floating according to claim 2 in conjunction with mixing pile or rotary churning pile is held
Piling engineering method, characterized in that including the stake core of single tube, dual tube method, triple tube or the rotary churning pile of multitube construction or mixing pile
Stake lap-joint setting construction hole or directly drilling.
4. variable diameters steel reinforcement cage enlarged footing anchor pole anti-floating according to claim 3 in conjunction with mixing pile or rotary churning pile is held
Piling engineering method, characterized in that in the interval (lap-joint) of dual tube method high-pressure rotary jet grouting pile: between dual pipe high-pressure rotary jet grouting pile
Interval setting construction hole or directly drilling every place, or in two adjacent dual pipe high-pressure rotary jet grouting piles.
5. variable diameters steel reinforcement cage enlarged footing anchor pole anti-floating according to claim 2 in conjunction with mixing pile or rotary churning pile is held
Piling engineering method, characterized in that single tube, dual tube method, the rotary churning pile of triple pipe constructions or mixing pile stake core initial set front and back during
Carry out construction variable diameters steel reinforcement cage enlarged footing Composite Bolt or pressure bearing pile.
6. variable diameters steel reinforcement cage enlarged footing anchor pole anti-floating according to claim 2 in conjunction with mixing pile or rotary churning pile is held
Piling engineering method, characterized in that reserved anchor pole or pressure-bearing pile driving construction hole after the completion of mixing pile construction or high-pressure rotary jet grouting pile have to pile body
Anchor pole or the reaming of pressure bearing pile bottom end are carried out after having some strength, variable diameters steel reinforcement cage is transferred and pull rod is total, slip casting or perfusion fill mixed
Solidifying soil Composite Bolt or pressure bearing pile stake pile.
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|---|---|---|---|
| CN201811533682.7A CN109457694A (en) | 2018-12-14 | 2018-12-14 | A kind of variable diameters steel reinforcement cage enlarged footing anti-floating or pressure bearing pile and construction in conjunction with mixing pile or rotary churning pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811533682.7A CN109457694A (en) | 2018-12-14 | 2018-12-14 | A kind of variable diameters steel reinforcement cage enlarged footing anti-floating or pressure bearing pile and construction in conjunction with mixing pile or rotary churning pile |
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| CN109457694A true CN109457694A (en) | 2019-03-12 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110172969A (en) * | 2019-06-17 | 2019-08-27 | 中交第三公路工程局有限公司 | Quadruple pipe Construction of High Pressure Jet Grouting Pile method |
| CN111851482A (en) * | 2020-08-28 | 2020-10-30 | 江苏景源万河环境科技有限公司 | Prestressed anchor rod pile for reinforcing foundation through rotary spraying, powder spraying or stirring pile and construction method |
| CN113047275A (en) * | 2021-03-29 | 2021-06-29 | 江苏富路建设有限公司 | Construction method of enlarged footing concrete anchor rod |
| CN113585249A (en) * | 2021-07-30 | 2021-11-02 | 燕山大学 | Three-layer structure expanded end anchor rod system and construction method |
| CN114808950A (en) * | 2022-05-22 | 2022-07-29 | 赵关保 | Concrete cast-in-place pile with pile end reinforcing body capable of providing uplift resistance and construction method |
| CN115075226A (en) * | 2022-07-01 | 2022-09-20 | 中铨建设集团有限公司 | Construction method for assembled high-pressure jet grouting reducing telescopic reinforcement cage expansion anchor cable |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110172969A (en) * | 2019-06-17 | 2019-08-27 | 中交第三公路工程局有限公司 | Quadruple pipe Construction of High Pressure Jet Grouting Pile method |
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| CN111851482A (en) * | 2020-08-28 | 2020-10-30 | 江苏景源万河环境科技有限公司 | Prestressed anchor rod pile for reinforcing foundation through rotary spraying, powder spraying or stirring pile and construction method |
| CN113047275A (en) * | 2021-03-29 | 2021-06-29 | 江苏富路建设有限公司 | Construction method of enlarged footing concrete anchor rod |
| CN113585249A (en) * | 2021-07-30 | 2021-11-02 | 燕山大学 | Three-layer structure expanded end anchor rod system and construction method |
| CN114808950A (en) * | 2022-05-22 | 2022-07-29 | 赵关保 | Concrete cast-in-place pile with pile end reinforcing body capable of providing uplift resistance and construction method |
| CN115075226A (en) * | 2022-07-01 | 2022-09-20 | 中铨建设集团有限公司 | Construction method for assembled high-pressure jet grouting reducing telescopic reinforcement cage expansion anchor cable |
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