CN109371974A - A kind of PHC tubular pole implantation construction method suitable for hard geology - Google Patents
A kind of PHC tubular pole implantation construction method suitable for hard geology Download PDFInfo
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- CN109371974A CN109371974A CN201811249872.6A CN201811249872A CN109371974A CN 109371974 A CN109371974 A CN 109371974A CN 201811249872 A CN201811249872 A CN 201811249872A CN 109371974 A CN109371974 A CN 109371974A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/06—Placing concrete under water
-
- 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
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of PHC tubular poles suitable for hard geology to be implanted into construction method, it drills first with rotary drilling rig to complete hard rock stratum, upper flow regime pea gravel concreten is perfused after pore-forming, before concrete initial set, PHC tubular pole is implanted into concrete with one heart to designed elevation, after concrete setting, PHC tubular pole and stake week concrete are combined into stiff composite pile, apply to pile for prestressed pipe in embedded rock pile, PHC tubular pile body concrete strength height and the big advantage of rock bearing capacity are given full play to, to improve bearing capacity of single pile.It is the piling Technology for integrating technical advance, reliability and economic rationality that PHC tube pile construction technology is planted after rotary digging drilling hole；The advantages of having many advantages, such as high efficiency, high intensity, economy, environmental protection, can giving full play to PHC tubular pole, reducings the construction costs under conditions of guaranteeing safety, quality, duration, new selection is provided to rock-socketed pile type selecting.
Description
Technical field
The present invention relates to technical field of building construction, in particular to a kind of PHC tubular pole implantation suitable for hard geology is applied
Work method.
Technical background
In pile foundation engineering application at present, under the conditions of the hard geology such as karst area, pile foundation is mainly with the filling of brill (punching) hole
It infuses based on stake, directly load is transferred on lava, improve bearing capacity of single pile by increasing stake diameter；Since scar is uneven
And it is irregular, the construction of pile for prestressed pipe conventional method is also easy to produce sliding pile, broken pile, can not also pass through hard interbedded layer or boulder, only when
When upper overburden layer is deep enough and can provide higher pile side friction, prestressed pipe pile foundation is just properly selected, it is general using friction
Stake, does not touch basement rock.But pile for prestressed pipe stake side development of resistance in soil layer is incomplete, pile body under vertical compression load
Concrete high-strength degree can not give full play to, and pile sinking generates soil compaction effect and can cause not to close to buildings, pipe network and road
It is big to result in pile for prestressed pipe application limitation in the hard geology such as karst area for good influence.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of PHC tubular pole plants suitable for hard geology
Enter construction method, outstanding features, the economic benefit such as fast, safe and reliable, at low cost, quality controllable are bright with speed of application for this method
It is aobvious.
The technical solution of the present invention is as follows: a kind of PHC tubular pole suitable for hard geology is implanted into construction method, first with rotation
Drill hole of drilling machine is dug to complete hard rock stratum, PHC tubular pole is implanted into coagulation before concrete initial set by concrete perfusion after pore-forming with one heart
To designed elevation in soil, PHC tubular pole and stake week concrete are combined into stiff composite pile after concrete setting.It specifically includes following
Step:
(1) surveying setting-out: stake position, which is surveyed to set, carries out construction layout by from entirety to the principle of part；The central point of stake position, before pore-forming
With total station repetition measurement, the central point of stake is first made, original ground absolute altitude is measured, is all around symmetrical arranged outside 2~4m of stake holes center
Site localization fender pile, bracing wire is in cross true fixed pile when construction；
(2) it buries casing: carrying out shield-tube embedment work after each position determines；It is tamped around casing with clay, casing center
And the centrical deviation of stake is not greater than 50mm；The measured hole deep datum mark front and back with sediment thickness is controlled when construction keeps one
It causes；
(3) rotary drilling rig is in place: place is flattened before rotary drilling rig is in place, weaker soil property will change filling out,
Its bearing capacity is set to meet the force request under rotary drilling rig peak load operating condition；When drilling machine is in place, the property of rotary drilling rig is first checked
Whether energy state is good, guarantees that rotary drilling rig is working properly；The position of drilling machine is determined by surveying the stake level set, and guarantees to revolve
Dig drilling machine stablize, by manual leveling to guarantee that drilling rod is vertical after, using automatic control system adjustment drilling rod keep vertical state,
Bit central uses locator align piles position, and position error is not more than 20mm；
(4) rotary drilling rig drills: according to geological condition controlled footage speed in rotary drilling rig boring procedure: being got by hard formation soft
When stratum, suitably accelerate rate of penetration；When soft formation becomes hard formation, deceleration slow-motion；It is appropriate to increase in the stratum of easy undergauge
Add cleaning bottom of hole number, prevents undergauge；Hard plastic layer is crept into using fast revolving speed, to improve drilling efficiency；It is deep that drilling reaches predetermined drilling
After degree, lift drilling rod, measurement hole depth, aperture, hole wall verticality and sediment thickness；
(5) it pore-forming and verifies: after pore-forming reaches designed elevation, hole depth, aperture, hole wall verticality and sediment thickness being checked
After qualification, stop bore operation, cleans out the heavy quarrel in a bottom；
(6) conduit is installed: conduit decentralization should it is vertical, put down gently, in order to avoid collision hole wall, errorless on inspection after transferring conduit to bottom hole
Afterwards, lift conduit control base opening apart from 0.3~0.5m of bottom hole, and be located at drilling center；Conduit should measure conduit when installing section by section
Physical length is simultaneously sequentially numbered, and is made a record to control pipe laying depth during filling concrete；
(7) conduit pouring underwater concrete: is sunk into the depth away from 300~500mm of bottom hole in the state that conduit bottom is open
Place, continuous pouring concrete above mention conduit, and mouth is embedded in concrete lower 1 meter or more always under conduit, and filling concrete finishes,
Extract casing；The implantation of PHC tubular pole is completed before concrete initial set；
(8) it hangs stake positioning: being put a little, marked on the concrete for pour completion with total station；The PHC tubular pole of horizontal handling is adopted
With both ends hook block method, single-point method is used when holding up, and lifts by crane process held stationary；
(9) hammer piling: stake machine is in place, and first segment PHC tubular pole is hung and is sent to stake machine, after the welding of PHC tubular pole pile top, carries out slotting
Stake feeds stake with the suspension hook on stake machine, and align piles position falls PHC tubular pole, carries out hammer piling；During PHC tubular pole injection, stake
The center line of hammer, pile cover and pile body should be overlapped, and guarantee first segment PHC tubular pole lifts by crane perpendicularity deviation when being inserted into ground in place not
It obtains and is greater than 0.5%；
(10) pile extension: pile extension is carried out when first segment PHC tubular pole is apart from 0.5~1.0 meter of ground, the second section PHC tubular pole is hung to
The top of first segment PHC tubular pole, section is kept straight up and down；Pile extension uses steel end plate welding method, and carbon dioxide gas arc welding is right
PHC pipe pile joint is welded, and dislocation deviation is not more than 5mm；
(11) terminate pile sinking: after stake machine stops injection, PHC tubular pole verticality must not exceed 1%.
Further, in the step (2), casing internal diameter is greater than 200~250mm of bit diameter, 1.0~1.5m of length,
At least 300mm above ground level at the top of casing.
Further, it in the step (3), needs to carry out drilling rod vertical adjustment, construction before rotary drilling rig bore operation
Check the verticality of pore-forming repeatedly by the three-dimensional vertical control system of rotary drilling rig itself in the process, it is ensured that pore-forming pile verticality
It is≤1% long.
Further, in the step (5), the standard of passed examination are as follows: hole depth, aperture are not less than design code, hole wall
The error of perpendicularity is not more than 1%；Sediment thickness≤50mm.
Further, in the step (7), the concrete is upper flow regime pea gravel concreten, and is added with efficient diminishing
Agent and retarder.
Further, pore-forming time and concreting time were separated by no more than 4 hours.
Further, the PHC tubular pile body strength grade of concrete is not less than C80.
Further, the PHC pipe pile joint is fast mechanical connector, the PHC pipe pile joint natural cooling after being welded
After could continue injection or pressure, the natural cooling time is not less than 8min.
The beneficial effects of the present invention are: the PHC tubular pole that the present invention is suitable for hard geology is implanted into construction method, first with rotation
Drill hole of drilling machine is dug to complete hard rock stratum, upper flow regime pea gravel concreten is perfused after pore-forming, before concrete initial set, by PHC tubular pole
With one heart to designed elevation in implantation concrete, after concrete setting, it is compound that PHC tubular pole with stake week concrete is combined into stiffness
Stake, makes pile for prestressed pipe really become embedded rock pile, gives full play to concrete strength of pile height and the big advantage of rock bearing capacity, with
Improve bearing capacity of single pile.It is collection technical advance, reliability and economical rationality that PHC tube pile construction technology is planted after rotary digging drilling hole
Property in one piling Technology；Have many advantages, such as high efficiency, high intensity, economy, environmental protection, PHC tubular pole can be given full play to
The advantages of, it reducings the construction costs under conditions of guaranteeing safety, quality, duration, new selection is provided to rock-socketed pile type selecting,
PHC tubular pole is set to shine commercial viability more powerful out in embedded rock pile；The master of PHC tube pile construction technology is planted after rotary digging drilling hole
Wanting stressed member is prestressed high-strength concrete pile, improves the equipment rate of pile foundation engineering, and active response is national current
Greatly develop the policy requirements of assembled architecture.
Detailed description of the invention
Fig. 1 is the process flow chart that the PHC tubular pole suitable for hard geology of the invention is implanted into construction method.
Specific embodiment
As shown in Figure 1, a kind of PHC tubular pole suitable for hard geology of the present invention is implanted into construction method, comprising the following steps:
(1) surveying setting-out: stake position, which is surveyed to set, carries out construction layout by from entirety to the principle of part；The central point of stake position, before pore-forming
With total station repetition measurement, the central point of stake is first made, original ground absolute altitude is measured, is all around symmetrical arranged outside 2~4m of stake holes center
Site localization fender pile, bracing wire is in cross true fixed pile when construction；
(2) it buries casing: carrying out shield-tube embedment work after each position determines；Casing internal diameter should be greater than bit diameter 200mm,
1.0~1.5m of length, casing top 300mm above ground level；It is tamped around casing with clay, casing center and stake are centrical partially
Difference is not greater than 50mm；The measured hole deep datum mark front and back with sediment thickness is controlled when construction to be consistent；
(3) rotary drilling rig is in place: place is flattened before rotary drilling rig is in place, weaker soil property will change filling out,
Its bearing capacity is set to meet the force request under rotary drilling rig peak load operating condition；When drilling machine is in place, the property of rotary drilling rig is first checked
Whether energy state is good, guarantees that rotary drilling rig is working properly；, need to adjust drilling rod before rotary drilling rig bore operation
It hangs down, the three-dimensional vertical control system in work progress by rotary drilling rig itself checks the verticality of pore-forming repeatedly, it is ensured that pore-forming
Pile verticality≤1% is long；The position of drilling machine is determined by surveying the stake level set, and guarantees that rotary drilling rig is stablized, and passes through hand
After dynamic leveling is to guarantee that drilling rod is vertical, vertical state is kept using automatic control system adjustment drilling rod, bit central is using positioning
Device align piles position, position error are not more than 20mm；
(4) rotary drilling rig drills: according to geological condition controlled footage speed in rotary drilling rig boring procedure: being got by hard formation soft
When stratum, suitably accelerate rate of penetration；When soft formation becomes hard formation, deceleration slow-motion；It is appropriate to increase in the stratum of easy undergauge
Add cleaning bottom of hole number, prevents undergauge；Hard plastic layer is crept into using fast revolving speed, to improve drilling efficiency；It is deep that drilling reaches predetermined drilling
After degree, lift drilling rod, measurement hole depth, aperture, hole wall verticality and sediment thickness；
(5) it pore-forming and verifies: after pore-forming reaches designed elevation, hole depth, aperture, hole wall verticality and sediment thickness being checked
After qualification, stop bore operation, cleans out the heavy quarrel in a bottom；The standard of passed examination are as follows: hole depth, aperture are not less than design rule
Fixed, the hole wall error of perpendicularity is not more than 1%；Sediment thickness≤50mm；
(6) conduit is installed: conduit decentralization should it is vertical, put down gently, in order to avoid collision hole wall, errorless on inspection after transferring conduit to bottom hole
Afterwards, lift conduit control base opening apart from 0.3~0.5m of bottom hole, and be located at drilling center；Conduit should measure conduit when installing section by section
Physical length is simultaneously sequentially numbered, and is made a record to control pipe laying depth during filling concrete；
(7) conduit pouring underwater concrete: is sunk into the depth away from 300~500mm of bottom hole in the state that conduit bottom is open
Place, continuous pouring concrete above mention conduit, and mouth is embedded in concrete lower 1 meter or more always under conduit, and filling concrete finishes,
Extract casing；The implantation of PHC tubular pole is completed before concrete initial set；The concrete is upper flow regime pea gravel concreten, and is added
Added with high efficiency water reducing agent and retarder, good workability, mobility are made it have；
(8) it hangs stake positioning: being put a little, marked on the concrete for pour completion with total station；The PHC tubular pole of horizontal handling is adopted
With both ends hook block method, single-point method is used when holding up, and lifts by crane process held stationary；
(9) hammer piling: stake machine is in place, and first segment PHC tubular pole is hung and is sent to stake machine, after the welding of PHC tubular pole pile top, carries out slotting
Stake feeds stake with the suspension hook on stake machine, and align piles position falls PHC tubular pole, carries out hammer piling；During PHC tubular pole injection, stake
The center line of hammer, pile cover and pile body should be overlapped, and guarantee first segment PHC tubular pole lifts by crane perpendicularity deviation when being inserted into ground in place not
It obtains and is greater than 0.5%；
(10) pile extension: pile extension is carried out when first segment PHC tubular pole is apart from 0.5~1.0 meter of ground, the second section PHC tubular pole is hung to
The top of first segment PHC tubular pole, section is kept straight up and down；Pile extension uses steel end plate welding method, and carbon dioxide gas arc welding is right
PHC pipe pile joint is welded, and dislocation deviation is not more than 5mm；
(11) terminate pile sinking: the control standard that Driven Piles terminate pile sinking should be met the following requirements: 1, terminating pile sinking should be marked with stake end
Based on height control, supplemented by penetration control；Stake end reach hard, hard plastic cohesive soil, in the close above silt, sand, rubble class
It, should be based on penetration control, supplemented by the control of stake end absolute altitude when soil and decomposed rock；2, pile penetration has reached and stake end absolute altitude does not reach
Then, 3 gusts of hammering should be continued, the pile penetration hit by every gust 10 adds their confirmation no more than numerical value as defined in related specifications and regulation,
Construction control pile penetration should negotiate to determine by test with design when necessary；After stake machine stops injection, PHC tubular pole verticality must not
More than 1%.
In addition, the pore-forming time is unsuitable too long with concreting time, it is no more than 4 hours；Each stake holes will at least carry out
The inspection of bottom hole sediment thickness three times is respectively: just when pore-forming, before catheter installation and after conduit decentralization before concrete casting.
After last time borehole cleaning is qualified, placing concrete should be started in 2 hours.To guarantee construction quality and project progress, constructed
Cheng Zhong must guarantee Finish time with concrete company close ties, rational allocation pump truck and concrete distribution time.
When having the short time to rest in filling process, frequent pilot manifold makes concrete keep enough mobility, Yi Mianfa
Raw plugging phenomenon should stop being perfused if plugging phenomenon occurs, be inserted into after horse back cleaning and dredging conduit 0.5 under perfusion face~
Continue to be perfused at 1.0m, interval time cannot be longer than 1 hour and must assure that the concrete poured is not up to the presetting period.
The PHC tubular pile body strength grade of concrete is not less than C80, and PHC pipe pile joint, which is located in humus, preferably to be used
Fast mechanical connector；When using welding point, pile extension steel components should apply anticorrosion wear-resistant coating or increase throat depth, corrosion
Allowance should not be less than 2mm；The PHC tubular pole applied under chloride ion corrosion environment, pile concrete should add reinforcing steel bar corrosion inhibitor and
Mineral admixture, the tubular pole applied under sulphate corrosion environment, pile concrete should be using sulfate-resistant cement or admixture mines
Polymer blends material；It could continue injection or pressure after PHC pipe pile joint natural cooling after being welded, the natural cooling time is not less than
8min。
A kind of PHC tubular pole suitable for hard geology of the present invention is implanted into construction method, mainly has the advantage that
One, it is able to solve PHC pipe pile end and is difficult to the problem of passing through hard geology, and using hard geology as supporting course, fill
The high advantage of PHC tubular pile body bearing capacity is waved in distribution；
Two, the soil compaction effect for completely eliminating PHC tubular pole traditional construction technique avoids pile sinking to the adjacent stake, adjacent building of having constructed
The influence of object, underground utilities, slope stability and deep basal pit stability, conducive to the protection to adjacent stake and periphery existing building；
Three, this engineering method rotary digging drilling hole perfusion pea gravel concreten and implantation PHC tubular pole is combined stiff composite pile with one heart, can get
Higher bearing capacity of single pile (experimental data comparison is shown in Table 1), compared with the conventional borehole bored concrete pile of identical bearing capacity of single pile,
Construction effect is high, obtaining case unit capacity, cost is relatively low；
Four, this engineering method improves the equipment rate of pile foundation engineering, and active response is national currently to greatly develop assembled architecture
Policy；
Five, suitable for upper overburden layer, shallower, overlaying bedrock is hard rock to this engineering method, rock stratum is unevenly distributed, scar fluctuating is big, soft or hard
The pile foundation engineering of the complex geological conditions such as alternating layers alternation sum karst area, with good economic efficiency and social benefit push away
Wide application prospect is very wide.
By taking the construction of A real estate project pile foundation engineering as an example, the PHC tubular pole that the present invention is suitable for hard geology is implanted into construction party
Method, by summarizing for many years on the basis of pile foundation construction in karst area experience, in conjunction with plant PHC tube pile construction after rotary digging drilling hole
Technology has given full play to the advantages of PHC tubular pile body high-bearing capacity, improves construction effect.Single pile pilot hole 800mm implantation
600mm PHC tubular pole and 1000mm rotary digging stake project cost, work efficiency comparison are as shown in table 2 and table 3.
In the project by rotary digging drilling hole after plant PHC tube pile construction technology items process strict implement implement,
It is compared at completed 170 pile (total 2945.6m) and uses rotary digging stake, shortened the construction period 5 days, by daily project flower
Take 8000 yuan of calculating, then saves 40,000 yuan.About 420,000 yuan of fee of material, machinery cost etc. are reduced, amounts to and reduces cost 46
Wan Yuan.By successful application to engineering practice, the engineering method is fast, safe and reliable, at low cost, quality controllable etc. prominent with speed of application
Feature out, economic benefit are obvious.
Table 1: vertical bearing capacity of single pile characteristic value test data contrast table under the conditions of identical geology
Table 2: PHC tubular pole and rotary digging stake Cost Comparison and Analysis table are planted after rotary digging drilling hole
Table 3: PHC tubular pole and rotary digging stake work efficiency comparative analysis table are planted after rotary digging drilling hole
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, it is any without
The variation or simple replacement that creative work is expected are crossed, should be all included within the scope of the present invention.
Claims (9)
1. a kind of PHC tubular pole suitable for hard geology is implanted into construction method, it is characterised in that: first with rotary drilling rig drill to
PHC tubular pole, is implanted into concrete to design with one heart before concrete initial set and marks by complete hard rock stratum, concrete perfusion after pore-forming
Height, PHC tubular pole and stake week concrete are combined into stiff composite pile after concrete setting.
2. the PHC tubular pole according to claim 1 suitable for hard geology is implanted into construction method, which is characterized in that specific
The following steps are included:
(1) surveying setting-out: stake position, which is surveyed to set, carries out construction layout by from entirety to the principle of part；The central point of stake position, before pore-forming
With total station repetition measurement, the central point of stake is first made, original ground absolute altitude is measured, is all around symmetrical arranged outside 2~4m of stake holes center
Site localization fender pile, bracing wire is in cross true fixed pile when construction；
(2) it buries casing: carrying out shield-tube embedment work after each position determines；It is tamped around casing with clay, casing center
And the centrical deviation of stake is not greater than 50mm；The measured hole deep datum mark front and back with sediment thickness is controlled when construction keeps one
It causes；
(3) rotary drilling rig is in place: place is flattened before rotary drilling rig is in place, weaker soil property will change filling out,
Its bearing capacity is set to meet the force request under rotary drilling rig peak load operating condition；When drilling machine is in place, the property of rotary drilling rig is first checked
Whether energy state is good, guarantees that rotary drilling rig is working properly；The position of drilling machine is determined by surveying the stake level set, and guarantees to revolve
Dig drilling machine stablize, by manual leveling to guarantee that drilling rod is vertical after, using automatic control system adjustment drilling rod keep vertical state,
Bit central uses locator align piles position, and position error is not more than 20mm；
(4) rotary drilling rig drills: according to geological condition controlled footage speed in rotary drilling rig boring procedure: being got by hard formation soft
When stratum, suitably accelerate rate of penetration；When soft formation becomes hard formation, deceleration slow-motion；It is appropriate to increase in the stratum of easy undergauge
Add cleaning bottom of hole number, prevents undergauge；Hard plastic layer is crept into using fast revolving speed, to improve drilling efficiency；It is deep that drilling reaches predetermined drilling
After degree, lift drilling rod, measurement hole depth, aperture, hole wall verticality and sediment thickness；
(5) it pore-forming and verifies: after pore-forming reaches designed elevation, hole depth, aperture, hole wall verticality and sediment thickness being checked
After qualification, stop bore operation, cleans out the heavy quarrel in a bottom；
(6) conduit is installed: conduit decentralization should it is vertical, put down gently, in order to avoid collision hole wall, errorless on inspection after transferring conduit to bottom hole
Afterwards, lift conduit control base opening apart from 0.3~0.5m of bottom hole, and be located at drilling center；Conduit should measure conduit when installing section by section
Physical length is simultaneously sequentially numbered, and is made a record to control pipe laying depth during filling concrete；
(7) conduit pouring underwater concrete: is sunk into the depth away from 300~500mm of bottom hole in the state that conduit bottom is open
Place, continuous pouring concrete above mention conduit, and mouth is embedded in concrete lower 1 meter or more always under conduit, and filling concrete finishes,
Extract casing；The implantation of PHC tubular pole is completed before concrete initial set；
(8) it hangs stake positioning: being put a little, marked on the concrete for pour completion with total station；The PHC tubular pole of horizontal handling is adopted
With both ends hook block method, single-point method is used when holding up, and lifts by crane process held stationary；
(9) hammer piling: stake machine is in place, and first segment PHC tubular pole is hung and is sent to stake machine, after the welding of PHC tubular pole pile top, carries out slotting
Stake feeds stake with the suspension hook on stake machine, and align piles position falls PHC tubular pole, carries out hammer piling；During PHC tubular pole injection, stake
The center line of hammer, pile cover and pile body should be overlapped, and guarantee first segment PHC tubular pole lifts by crane perpendicularity deviation when being inserted into ground in place not
It obtains and is greater than 0.5%；
(10) pile extension: pile extension is carried out when first segment PHC tubular pole is apart from 0.5~1.0 meter of ground, the second section PHC tubular pole is hung to
The top of first segment PHC tubular pole, section is kept straight up and down；Pile extension uses steel end plate welding method, and carbon dioxide gas arc welding is right
PHC pipe pile joint is welded, and dislocation deviation is not more than 5mm；
(11) terminate pile sinking: after stake machine stops injection, PHC tubular pole verticality must not exceed 1%.
3. the PHC tubular pole according to claim 2 suitable for hard geology is implanted into construction method, it is characterised in that: it is described
In step (2), casing internal diameter is greater than 200~250mm of bit diameter, 1.0~1.5m of length, at the top of casing it is above ground level at least
300mm。
4. the PHC tubular pole according to claim 2 suitable for hard geology is implanted into construction method, it is characterised in that: it is described
In step (3), needs to carry out drilling rod vertical adjustment before rotary drilling rig bore operation, pass through rotary drilling rig itself in work progress
Three-dimensional vertical control system check the verticality of pore-forming repeatedly, it is ensured that pore-forming pile verticality≤1% is long.
5. the PHC tubular pole according to claim 2 suitable for hard geology is implanted into construction method, it is characterised in that: it is described
In step (5), the standard of passed examination are as follows: hole depth, aperture are not less than design code, and the hole wall error of perpendicularity is not more than 1%；It is heavy
Slag thickness≤50mm.
6. the PHC tubular pole according to claim 2 suitable for hard geology is implanted into construction method, it is characterised in that: it is described
In step (7), the concrete is upper flow regime pea gravel concreten, and is added with high efficiency water reducing agent and retarder.
7. the PHC tubular pole according to claim 2 suitable for hard geology is implanted into construction method, it is characterised in that: pore-forming
Time and concreting time were separated by no more than 4 hours.
8. the PHC tubular pole according to claim 2 suitable for hard geology is implanted into construction method, it is characterised in that: it is described
PHC tubular pile body strength grade of concrete is not less than C80.
9. the PHC tubular pole according to claim 2 suitable for hard geology is implanted into construction method, it is characterised in that: it is described
PHC pipe pile joint is fast mechanical connector, could continue injection or pressure after the PHC pipe pile joint natural cooling after being welded,
The natural cooling time is not less than 8min.
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| CN112609687A (en) * | 2020-11-17 | 2021-04-06 | 中国建筑第八工程局有限公司 | PHC pipe pile planting construction method |
| CN112942341A (en) * | 2021-02-06 | 2021-06-11 | 中建四局建设发展有限公司 | Construction method for implanting prefabricated pipe pile into complex geology |
| CN113152450A (en) * | 2021-04-22 | 2021-07-23 | 广东际安工程管理有限公司 | Application of prestressed concrete pipe pile planting technology in complex foundation |
| CN113235575A (en) * | 2020-12-15 | 2021-08-10 | 陈汝连 | Construction method of rotary excavated pile in bridge construction |
| CN113431039A (en) * | 2021-06-08 | 2021-09-24 | 中交一公局集团有限公司 | Construction method of bridge implanted pile |
| CN113668493A (en) * | 2021-08-18 | 2021-11-19 | 中建一局集团建设发展有限公司 | Construction method of prestressed pipe pile reinforcement system in soft soil geology |
| CN113774906A (en) * | 2021-07-29 | 2021-12-10 | 安徽省交通规划设计研究总院股份有限公司 | Construction process for implanting composite-section hollow pile by filling mortar into expanded lead hole |
| CN114329953A (en) * | 2021-12-27 | 2022-04-12 | 中建铁路投资建设集团有限公司 | Method for judging whether screw pile enters bearing stratum or not |
| CN114319354A (en) * | 2022-01-21 | 2022-04-12 | 中国建筑第八工程局有限公司 | Construction method for implanting prestressed high-strength concrete pipe pile |
| CN114482013A (en) * | 2022-02-14 | 2022-05-13 | 安徽省交通规划设计研究总院股份有限公司 | Suspended rock-socketed composite pile structure for hole-expanding precast pile and construction method of suspended rock-socketed composite pile structure |
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| CN112609687A (en) * | 2020-11-17 | 2021-04-06 | 中国建筑第八工程局有限公司 | PHC pipe pile planting construction method |
| CN113235575A (en) * | 2020-12-15 | 2021-08-10 | 陈汝连 | Construction method of rotary excavated pile in bridge construction |
| CN112942341A (en) * | 2021-02-06 | 2021-06-11 | 中建四局建设发展有限公司 | Construction method for implanting prefabricated pipe pile into complex geology |
| CN113152450A (en) * | 2021-04-22 | 2021-07-23 | 广东际安工程管理有限公司 | Application of prestressed concrete pipe pile planting technology in complex foundation |
| CN113431039A (en) * | 2021-06-08 | 2021-09-24 | 中交一公局集团有限公司 | Construction method of bridge implanted pile |
| CN113774906A (en) * | 2021-07-29 | 2021-12-10 | 安徽省交通规划设计研究总院股份有限公司 | Construction process for implanting composite-section hollow pile by filling mortar into expanded lead hole |
| CN113668493A (en) * | 2021-08-18 | 2021-11-19 | 中建一局集团建设发展有限公司 | Construction method of prestressed pipe pile reinforcement system in soft soil geology |
| CN114329953A (en) * | 2021-12-27 | 2022-04-12 | 中建铁路投资建设集团有限公司 | Method for judging whether screw pile enters bearing stratum or not |
| CN114319354A (en) * | 2022-01-21 | 2022-04-12 | 中国建筑第八工程局有限公司 | Construction method for implanting prestressed high-strength concrete pipe pile |
| CN114482013A (en) * | 2022-02-14 | 2022-05-13 | 安徽省交通规划设计研究总院股份有限公司 | Suspended rock-socketed composite pile structure for hole-expanding precast pile and construction method of suspended rock-socketed composite pile structure |
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