CN108775036A - A kind of construction method for replacing bored concrete pile - Google Patents
A kind of construction method for replacing bored concrete pile Download PDFInfo
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- CN108775036A CN108775036A CN201810600480.3A CN201810600480A CN108775036A CN 108775036 A CN108775036 A CN 108775036A CN 201810600480 A CN201810600480 A CN 201810600480A CN 108775036 A CN108775036 A CN 108775036A
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- Prior art keywords
- old
- stake holes
- pile
- pile body
- casing
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
Abstract
The present invention relates to the technical fields of rotary digging bored concrete pile, disclose a kind of construction method for replacing bored concrete pile, include the following steps：(1) full-rotating drill sinking sleeve under the periphery of old pile body makes old pile body be isolated with the soil body to the bottom of old pile body, extracts old pile body, forms old stake holes；(2) old stake holes backfills soil-cement, and backfill while pulls out casing；(3) soil-cement is tamped, stands one week；(4) outer casing, then embedded interior casing are buried, for interior casing in outer casing, outer casing is equipped with location structure；The lower part of interior casing sinks down into the lower section of the bottom of old stake holes；(5) soil body for excavating the inside of interior casing forms new stake holes；(6) steel reinforcement cage is transferred, concrete perfusion forms new pile body.Entirety pulls out old pile body, and work efficiency higher is conducive to recycle and manage；Old stake holes backfill, reduces the hidden danger of quality of new stake holes；By this construction method the replacement of old pile body and new pile body is realized in urban project update.
Description
Technical field
The present invention relates to the technical field for replacing bored concrete pile, more particularly to a kind of construction method for replacing bored concrete pile.
Background technology
With the needs of urban construction and development, can be gradually decreased for the land used of Yingcheng City construction, therefore, urban renewal is
The trend of urban modernization construction, still, there are the old foundation piles of a large amount of existing buildings in the place of this intermediate item, new build occur
Project pile foundation is overlapping with old stake or partly overlapping phenomenon occurs.
Currently, for the processing of the old stake of urban renewal project, under normal circumstances, using impact crushing method, using jump bit
The concrete of old stake and steel reinforcement cage are crushed from top to bottom, in such method impact process, often need to replace electromagnet,
Ensure the absorption of old reinforcing bar, cumbersome, speed of application is slow, and processing time length, comprehensive cost are high.
In addition, old stake is constructed after abolishing when new pile, the backfill in old stake holes easily generates collapse hole situation, makes new foundation pile
Construction quality be difficult to be effectively ensured.
Invention content
The purpose of the present invention is to provide a kind of construction methods for replacing bored concrete pile, it is intended to solve in the prior art in city
In project update, it is difficult to realize the problem of old pile body is replaced with new pile body.
The invention is realized in this way a kind of construction method for replacing bored concrete pile, includes the following steps：
(1) the old pile body on construction ground is pulled out；Cushion cap concrete around the pile crown and pile crown of old stake is abolished, pile crown steel is made
Muscle reveals；Using full-rotating drill, sinking sleeve makes old pile body and the soil body to the bottom of old pile body under the periphery of old pile body
Isolation, is integrally extracted old pile body by crane；After old pile body is pulled out, old stake holes is formed；
(2) full-rotating drill has bucket, backfills soil-cement in the old stake holes by the bucket, institute
It states full-rotating drill and gradually pulls out described sleeve pipe upward while backfilling soil-cement；
(3) soil-cement in old stake holes is tamped by the bucket, by roll compacting with soil-cement
Old stake holes stands one week；
(4) according to design requirement, after burying outer casing in the construction ground using hydraulic vibration driver, then embedded interior casing,
The interior casing has gap in the outer casing between the interior casing and the outer casing；The outer casing is set
There is the location structure being pre-positioned to the stake position center of the interior casing, when the interior casing sinks, the positioning knot
Structure extends to the gap and contradicts the outer surface of the interior casing；The lower part of the interior casing sinks down into the bottom of the old stake holes
The lower section in portion；
(5) soil body in the inside of interior casing is excavated using Spiral digging machine, forms new stake holes；
(6) steel reinforcement cage is vertically transferred using crane, the steel reinforcement cage is transferred to design position, using cage body limiting device
The fixed steel reinforcement cage；Filling concrete is carried out by the way that conduit is perfused, perfusion condensation forms new pile body.
Further, connecting plate is connected on the pile body reinforcing bar, the connecting plate is connected to transverse direction by steel wire rope
The transverse bar of arrangement drives the transverse bar to rotate so that the old pile body is in described sleeve pipe using the full convolution drilling machine
Rotation, until the old pile body is detached with the soil body.
Further, the connecting plate is equipped with buckle, the stress when transverse bar is equipped with multiple liftings for the crane
Lifting lug；The buckle and the lifting lug are fixed in the both ends of steel wire rope respectively.
Further, when carrying out the old stake holes backfill, if without more ponding in the old stake holes, using soil-cement
It is backfilled, the ranging from 3-8% of cement mixed weight.
Further, the hydraulic vibration driver is equipped with the hydraulically operated fixture for the outer casing and the interior casing to be clamped；
When the outer casing or the interior casing is clamped in the hydraulically operated fixture, the outer casing and the interior casing are perpendicular in institute respectively
State construction ground arrangement.
Further, the location structure includes multiple locating rods, and the locating rod extends to institute through the outer casing
It states gap and forms positioning end；When the interior casing sinks to the inside of the outer casing, multiple locating rods are around described interior
Casing arranges that the positioning end of the locating rod contradicts the outer surface of the interior casing respectively.
Further, during filling concrete, the height that lining rope detection concrete rises is used for multiple times, and in this process,
Concrete Continuous Perfusion.
Further, the perfusion depth of tremie control is in 2-6m.
Further, the Spiral digging machine excavates the soil body of the inside of the interior casing, forms new stake holes；It is wanted according to design
It asks, the new stake holes is in coincidence status or described in intersection or the new stake holes and the old stake holes with the old stake holes
New stake holes is in the old separated state of stake holes or the new stake holes in the old stake holes.
Compared with prior art, a kind of construction method for replacing bored concrete pile provided by the invention, using full-rotating drill knot
It closes loop wheel machine and integrally pulls out old pile body, work efficiency higher, and be conducive to the recycling and management of live building waste, to ambient enviroment shadow
Sound is small, realizes environmentally protective construction；Old stake holes is backfilled using soil-cement, not only reduces the quality of new pile pore-forming
Hidden danger also provides good site condition for large-scale rotary digging construction equipment machine-walking；It is sunk to by hydraulic vibration driver vibrations
Outer casing and interior casing, the soil body in the inside for excavating interior casing by Spiral digging machine, form new stake holes；It is applied using inside and outside double casings
Work technique, effectively prevents that collapse hole phenomenon occurs, improves the embedded efficiency and quality of interior casing, finally lifts steel reinforcement cage and carries out
Filling concrete forms new pile body, and old pile body and new pile body are realized in urban project update by this construction method
It replaces.
Description of the drawings
Fig. 1 is the schematic diagram that a kind of new stake holes of construction method for replacing bored concrete pile provided in an embodiment of the present invention is formed；
Fig. 2 is a kind of three-dimensional signal for hanging out old pile body of construction method for replacing bored concrete pile provided in an embodiment of the present invention
Figure；
Fig. 3 is the connection structure that a kind of old pile body of construction method for replacing bored concrete pile provided in an embodiment of the present invention is pulled out
Stereoscopic schematic diagram；
Fig. 4 is that a kind of inbuilt solid of double casings of construction method for replacing bored concrete pile provided in an embodiment of the present invention is shown
It is intended to.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The same or similar label correspond to the same or similar components in the attached drawing of the present embodiment；In description of the invention
In, it is to be understood that if there is the orientation or positional relationship of the instructions such as term "upper", "lower", "left", "right" for based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated dress
It sets or element must have a particular orientation, with specific azimuth configuration and operation, therefore the use of position relationship described in attached drawing
Language only for illustration, should not be understood as the limitation to this patent, for the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term is understood as the case may be.
The realization of the present invention is described in detail below in conjunction with specific embodiment.
Referring to Fig.1 shown in -4, preferred embodiment is provided for the present invention.
A kind of construction method for replacing bored concrete pile provided by the invention, for solving in urban project update, it is difficult to real
The problem of existing old pile body is replaced with new pile body.
A kind of construction method for replacing bored concrete pile, includes the following steps：
(1) the old pile body 30 on construction ground is pulled out；Cushion cap concrete around the pile crown and pile crown of old stake is abolished, pile crown is made
Reinforcing bar 32 reveals；Using full-rotating drill 50, sinking sleeve 80 makes to the bottom of old pile body 30 under the periphery of old pile body 30
Old pile body 30 is isolated with the soil body, is extracted 30 entirety of old pile body by crane 40；After old pile body 30 is pulled out, old stake holes 31 is formed；
(2) full-rotating drill 50 has bucket, soil-cement 20 is backfilled in old stake holes 31 by bucket, full circle swinging is bored
Machine 50 gradually pulls out casing 80 upward while backfilling soil-cement 20；
(3) soil-cement 20 in old stake holes 31 is tamped by bucket, by roll compacting have soil-cement 20
Old stake holes 31 stand one week；
(4) according to design requirement, after burying outer casing 12 in construction ground using hydraulic vibration driver 60, then embedded interior casing
10, interior casing 10 has gap in outer casing 12 between interior casing 10 and outer casing 12；Outer casing 12 is equipped with positioning and ties
The stake position center of structure, the internal casing of location structure 10 is pre-positioned, when interior casing 10 sinks, between location structure extends to
Gap and the outer surface for contradicting interior casing 10；The lower part of interior casing 10 sinks down into the lower section of the bottom of old stake holes 31；
(5) soil body in the inside of interior casing 10 is excavated using Spiral digging machine, forms new stake holes 11；
(6) using crane 40, vertically decentralization steel reinforcement cage, steel reinforcement cage are transferred to design position, solid using cage body limiting device
Determine steel reinforcement cage；Filling concrete is carried out by the way that conduit is perfused, perfusion condensation forms new pile body.
A kind of construction method of above-mentioned replacement bored concrete pile integrally pulls out old pile body using full-rotating drill 50 in conjunction with loop wheel machine
30, work efficiency higher, and be conducive to the recycling and management of live building waste, and it is small to surrounding environment influence, it realizes environmentally protective
Construction；Old stake holes 31 is backfilled using soil-cement 20, not only reduces the hidden danger of quality of new pile pore-forming, is also large size
Rotary digging construction equipment machine-walking provides good site condition；Outer casing and interior shield are sunk to by the vibrations of hydraulic vibration driver 60
Cylinder 10, excavates the soil body of the inside of interior casing, forms new stake holes 11；Using inside and outside double casing construction technologies, effectively prevent sending out
Raw collapse hole phenomenon, improves the embedded efficiency and quality of interior casing 10, finally, lifts steel reinforcement cage and carries out filling concrete,
New pile body is formed, by this construction method, in urban project update, realizes that old pile body is replaced with new pile body.
Before old pile body 30 is pulled out, cushion cap concrete around the pile crown and pile crown of old pile body 30 is abolished first, is dug out
Pile crown reinforcing bar 32；Loop wheel machine is welded by connecting plate 34 and pile crown reinforcing bar 32, convenient for pulling out for old pile body 30.
Furthermore pile crown reinforcing bar 32 is connected with connecting plate 34；Connecting plate 34 is connected to the cross of lateral arrangement by steel wire rope 35
To on bar 36, transverse bar 36 is driven to rotate using full convolution drilling machine 50 so that the rotation in casing 80 of old pile body 30, until old stake
Body 30 is detached with the soil body；It is convenient for pulling out old pile body in this way.
Transverse bar 36 is sling by crane 40, transverse bar 36 drives connecting plate 34 by steel wire rope 35, old to drive
Pile body 30 is whole to be extracted；In this way, the work efficiency that old pile body 30 is pulled out is high, also, be conducive to recycling and the pipe of live building waste
Reason.
Alternatively, after old pile body 30 is detached with the soil body, lifting lug 37 is connected using the suspender of crane 40, passes through 35 band of steel wire rope
Dynamic connecting plate 34, to drive old pile body 30 integrally to extract.
Connecting plate 34 is equipped with buckle 33, and transverse bar 36 is equipped with the lifting lug 37 of multiple stress when being lifted by crane for crane 40；Steel wire
The both ends difference fixed card buckle 33 and lifting lug 37 of rope 35；Under the action of buckling 33 with lifting lug 37, it is convenient for the peace of steel wire rope 35
If meanwhile steel wire rope 35 can be recycled；In addition, under the cooperation of each buckle 33, lifting lug 37 and steel wire rope 35, old pile body 30
That pulls out more stablizes, and improves working security.
Before full-rotating drill 50 is in place, place around smooth old pile foundation, consequently facilitating full-rotating drill 50 is in place.
Buildings in general pile foundation mostly uses pile for prestressed pipe and bored concrete pile, pile for prestressed pipe diameter it is common for 500mm,
600mm, bored concrete pile foundation stake diameter are generally 600mm, 800mm, big stake diameter about 1000mm, 1200mm or so.
The diameter of 50 casing 80 of full-rotating drill, stake of 80 diameter of casing than old pile body 30 are determined according to the diameter of old pile foundation
The big 400mm of diameter.
The both sides of full-rotating drill 50 are respectively equipped with counter-force seat 70, and 70 pairs of full-rotating drills 50 of counter-force seat play support and make
With；Enhance the safety in utilization of full-rotating drill 50.
When carrying out the backfill of old stake holes 31, if being backfilled using soil-cement 20, water without more ponding in old stake holes 31
The range 3-8% of mud incorporation, it is ensured that backfill intensity avoids backfill section uneven, loose easy collapse hole, to ensure the pile of new pile
Quality.
If there is more ponding in old stake holes 31, backfilled using graded broken stone, it is ensured that backfill intensity avoids backfill section not
, loose easy collapse hole, to ensure the pile quality of new pile.
Hydraulic vibration driver 60 is equipped with hydraulically operated fixture 61, and hydraulically operated fixture 61 is for being clamped outer casing 12 and interior casing 10；Work as liquid
When outer casing 12 or interior casing 10 is clamped in pressure fixture 61, outer casing 12 and interior casing 10 are perpendicular in construction ground arrangement respectively；From
And enhance the up rightness that outer casing and interior casing 10 sink.
Furthermore location structure includes multiple locating rods 13, and locating rod 13 extends to gap through outer casing 12 and forms positioning
End；When interior casing 10 sinks to the inside of outer casing 12, multiple locating rods 13 are arranged around interior casing 10, the positioning of locating rod 13
End contradicts the outer surface of interior casing 10 respectively；Under the mating reaction of locating rod 13 and outer casing 12, make the positioning of interior casing 10
Accurately, it is convenient for 10 sinking verticality of casing in control, makes the quality that follow-up new pile body is formed more preferably.
The depth ratio of the depth that interior casing 10 sinks and old stake holes 31 is 12:10；When new 11 pore-forming of stake holes, by mud balance
It suitably tunes up, to play reinforcement effect to backfill position.
Specifically, during filling concrete, the height that lining rope detection concrete rises is used for multiple times, grasps concrete at any time
Fluence is poured, prevents collapse hole phenomenon and occurs, meanwhile, it avoids that perfusion is caused to waste.
During filling concrete, concrete Continuous Perfusion；It avoids perfusion conduit that plugging occurs, causes perfusion accident.
Depth of tremie control is perfused in 2-6m；Ensure the effect of perfusion.
Spiral digging machine excavates the soil body of the inside of interior casing 10, forms new stake holes 11, and new stake holes 11 is in intersect with old stake holes 31
State；The replacement for completing bored concrete pile in this way promotes the pile quality of new pile body while saving place.
New stake holes 11 and old stake holes 31 are in coincidence status, realize the replacement of old stake holes 31 and new stake holes 11, while being ensured new
The pile quality of pile body.
New stake holes 11 and 31 separated state of old stake holes, realize the replacement of old stake holes 31 and new stake holes 11, while ensureing new
The pile quality of pile body.
New stake holes 11 is in the inside of old stake holes 31, realizes the replacement of old stake holes 31 and new stake holes 11, while ensureing new pile
The pile quality of body.
The construction procedure of reinforcing bar cage hoisting and filling concrete is as follows：
1), steel reinforcement cage main reinforcement welding is connected using mechanical sleeve, to ensure main reinforcement protective layer thickness, steel reinforcement cage each week
Concrete protective block is arranged in side spacing 3-5m.
2), steel reinforcement cage is hung using crane 40, alignment hole position when lifting, hang it is straight help steady, slowly transfer.Cage body, which is transferred to, to be set
It after counting position, is fixed using cage body limiting device in aperture, prevents steel reinforcement cage from occurring altering under floating when concrete is perfused
3) catheter installation, is perfused.Before perfusion, the suitable conduit of diameter is selected；Before downcomer, every section conduit is carried out detailed
It checks, the sealing water pressure test need to be done when using for the first time；Catheter connector bit encryption seal and coating butter, it is ensured that sealing can
It leans on, conduit bottom is from bottom hole 300-500mm.When transferring conduit, tune, which connects, matches catheter length.
4), before perfusion, after borehole cleaning, water proof plug is put into conduit, water proof plug uses rubber ball, installs first watering
Hopper covers sealing baffle, then carries out concrete material perfusion.To ensure first watering quality, ensure concrete first watering buried depth 0.8
Meter or more, suitable hopper is measured using side and carries out first watering.
5), during filling concrete, concrete lifting height is detected through common lining rope, promotes dismounting conduit in due course, conduit buries
Deep control is forbidden conduit bottom end proposing concrete face in 2-6m；Concrete pouring is carried out continuously, and to avoid plugging, causes perfusion thing
Therefore.
6) height difference that special messenger measures depth of tremie and the inside and outside concrete face of pipe, is set, Underwater Concrete cast record is filled in, grasps at any time every
Pile concrete pours fluence, prevents collapse hole phenomenon and occurs.
7), consider that stake top has certain laitance, the superfilled 80~100cm of height of stake top concrete, to ensure stake top concrete strength, simultaneously
It avoids again superfilled too many and causes to waste.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. a kind of construction method for replacing bored concrete pile, which is characterized in that include the following steps：
(1) the old pile body on construction ground is pulled out；Cushion cap concrete around the pile crown and pile crown of old stake is abolished, keeps pile crown reinforcing bar aobvious
Expose；Using full-rotating drill, sinking sleeve makes old pile body be isolated with the soil body to the bottom of old pile body under the periphery of old pile body,
Old pile body is integrally extracted by crane；After old pile body is pulled out, old stake holes is formed；
(2) full-rotating drill has bucket, and soil-cement is backfilled in the old stake holes by the bucket, described complete
Slewing drilling machine gradually pulls out described sleeve pipe upward while backfilling soil-cement；
(3) soil-cement in old stake holes is tamped by the bucket, the old stake with soil-cement of compacting will be rolled
Hole stands one week；
(4) according to design requirement, after burying outer casing in the construction ground using hydraulic vibration driver, then embedded interior casing, it is described
Interior casing has gap in the outer casing between the interior casing and the outer casing；The outer casing be equipped with pair
The location structure that the stake position center of the interior casing is pre-positioned, when the interior casing sinks, the location structure prolongs
It extends to the gap and contradicts the outer surface of the interior casing；The lower part of the interior casing sinks down into the bottom of the old stake holes
Lower section；
(5) soil body in the inside of interior casing is excavated using Spiral digging machine, forms new stake holes；
(6) steel reinforcement cage is vertically transferred using crane, the steel reinforcement cage is transferred to design position, is fixed using cage body limiting device
The steel reinforcement cage；Filling concrete is carried out by the way that conduit is perfused, perfusion condensation forms new pile body.
2. a kind of construction method for replacing bored concrete pile as described in claim 1, which is characterized in that connect on the pile body reinforcing bar
It is connected to connecting plate, the connecting plate, in the transverse bar of lateral arrangement, is driven by steel wire rope connection using the full convolution drilling machine
The transverse bar rotation so that the old pile body rotates in described sleeve pipe, until the old pile body is detached with the soil body.
3. a kind of construction method for replacing bored concrete pile as claimed in claim 2, which is characterized in that the connecting plate is equipped with card
Button, the lifting lug of stress when the transverse bar is equipped with multiple liftings for the crane；The card is fixed at the both ends of steel wire rope respectively
Button and the lifting lug.
4. a kind of construction method of replacement bored concrete pile as described in claim 1-3 any one, which is characterized in that described in progress
When old stake holes backfill, backfilled using soil-cement, the ranging from 3-8% of cement mixed weight.
5. a kind of construction method of replacement bored concrete pile as described in claim 1-3 any one, which is characterized in that the hydraulic pressure
Vibration hammer is equipped with the hydraulically operated fixture for the outer casing and the interior casing to be clamped；The outer casing is clamped in the hydraulically operated fixture
Or when the interior casing, the outer casing and interior casing is perpendicular respectively is arranged in the construction ground.
6. a kind of construction equipment for replacing bored concrete pile as claimed in claim 5, which is characterized in that the hydraulic vibration driver is equipped with
Hydraulically operated fixture described in two groups, hydraulically operated fixture described in two groups is in same level and positioned opposite；The hydraulically operated fixture includes two
Towards or away from from grip block；From top to bottom, the thickness of the grip block gradually decreases.
7. a kind of construction method of replacement bored concrete pile as described in claim 1-3 any one, which is characterized in that the positioning
Structure includes multiple locating rods, and the locating rod extends to the gap through the outer casing and forms positioning end；When described interior
When casing sinks to the inside of the outer casing, multiple locating rods are around the interior casing arrangement, the positioning of the locating rod
End contradicts the outer surface of the interior casing respectively.
8. a kind of construction method of replacement bored concrete pile as described in claim 1-3 any one, which is characterized in that concrete fills
During note, the height that lining rope detection concrete rises is used for multiple times, and in this process；Concrete Continuous Perfusion.
9. a kind of construction method of replacement bored concrete pile as described in claim 1-3 any one, which is characterized in that the perfusion
The scope control of depth of tremie is in 2-6m.
10. a kind of construction method of replacement bored concrete pile as described in claim 1-3 any one, which is characterized in that the rotation
Digging machine excavates the soil body of the inside of the interior casing, forms new stake holes；According to design requirement, the new stake holes and the old stake holes
With the old stake holes it is in detach with the old stake holes in coincidence status or the new stake holes in intersection or the new stake holes
State or the new stake holes are in the old stake holes.
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| CN201810600480.3A CN108775036A (en) | 2018-06-12 | 2018-06-12 | A kind of construction method for replacing bored concrete pile |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111305209A (en) * | 2020-02-25 | 2020-06-19 | 深圳市工勘岩土集团有限公司 | Sinking method for super-long steel casing of large-diameter super-deep cast-in-place pile |
| CN113529714A (en) * | 2021-07-17 | 2021-10-22 | 南京桥新建设有限公司 | Construction method for replacing old pile |
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| CN107338795A (en) * | 2017-06-09 | 2017-11-10 | 中铁建大桥工程局集团第五工程有限公司 | A kind of full-sleeve pulls out post row's formula bored pile construction method |
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Application publication date: 20181109 |