CN109555116A - A kind of high density karst intense development area fully-sleeved filled pile construction method - Google Patents
A kind of high density karst intense development area fully-sleeved filled pile construction method Download PDFInfo
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- CN109555116A CN109555116A CN201811324393.6A CN201811324393A CN109555116A CN 109555116 A CN109555116 A CN 109555116A CN 201811324393 A CN201811324393 A CN 201811324393A CN 109555116 A CN109555116 A CN 109555116A
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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
- E02D5/38—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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
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Abstract
The invention discloses a kind of high density karst intense development area fully-sleeved filled pile construction methods, include the following steps: preparation of construction, measure of pile position unwrapping wire, full circle swinging machine is in place, and casing, measurement adjustment verticality are placed in lifting, casing drilling is simultaneously grabbed except dregs, for the clear soil of casing drilling to designed elevation, cleaning hole bottom sediment checks hole depth, makes steel reinforcement cage, and hang steel reinforcement cage, conduit, casting concrete are placed, concrete, the displacement of full circle swinging jacketing machine are measured；In the present invention, using the analogue technique of bored concrete pile, solution cavity, soil cave model based on BIM, lead to before making excavation to known soil cave, solution cavity mortar depositing construction scheme；By the model of foundation, the shallower solution cavity of unknown large volume and buried depth is found, safety is carried out to construction personnel and is told somebody what one's real intentions are, and takes corresponding safety prevention measure, avoids safety accident.
Description
Technical field
The invention belongs to filling pile construction technical fields, and in particular to a kind of high density karst intense development area full-sleeve
Cast-in-place pile construction method.
Background technique
With the advance of city modernization, subway has been built in more and more city both at home and abroad, and subway becomes one
The mark of urban modernization, many construction projects are close to subway line, to subway tunnel perimeter settlement of foundation and soil deformation control
System is stringenter, necessarily becomes the important content of engineering construction to the protection of subway tunnel in the process close to subway construction, and
South China construction project multidigit in basement rock in limestone depression hydrogeological zone, place be limestone, scar fluctuations compared with
Greatly, and karst is relatively developed, and how to be guaranteed that construction period subway line safety protects pile foundation construction quality and duration again, is the type
The problem of construction.
Conventional borehole bored concrete pile has the drawback that the quality of stake is not easy to control and guarantees, is easy in concrete perfusion
In the process, there is the phenomenon that broken pile, necking down, dew muscle and interburden layer；Pile body diameter changes greatly, and hole bottom sediment is not easy to remove dry
Only, therefore the bearing capacity of single pile changes greatly.
It may cause mechanical equipment inclination in foundation construction, collapse, spillage may be caused in pile foundation construction, is collapsed
Phenomena such as hole, solution cavity are located at the section of level of ground water aggregation development in basement rock, and solution cavity is mainly unfavorable to the influence of pile foundation construction,
Possible spillage, card hammer, concrete casting difficulty etc. are mainly shown as in pore forming process；To improve Construction of Engineering Pile efficiency, guaranteeing
Construction quality is relied on the stake based on BIM, the analogue technique of hole model, cutter head load intelligent automatic control system and is based on novel
Drill control technology, makes high density karst intense development area fully-sleeved filled pile construction technology, guarantees both quality and quantity to ensure safety
The case where complete pile foundation construction.
Summary of the invention
The purpose of the present invention is to provide a kind of high density karst intense development area fully-sleeved filled pile construction method, with
It solves conventional borehole bored concrete pile mentioned above in the background art and is difficult to control and guarantees with the quality of stake, be easy mixed in perfusion
During solidifying soil, there is the phenomenon that broken pile, necking down, dew muscle and interburden layer；Pile body diameter changes greatly, and hole bottom sediment is not easy
It removes completely, therefore the bearing capacity of single pile changes greatly, and may cause mechanical equipment inclination in foundation construction, collapses, in stake
Phenomena such as may causing spillage, collapse hole when foundation construction, solution cavity are located at the section of level of ground water aggregation development in basement rock, solution cavity
The mainly unfavorable problem of the influence to pile foundation construction.
To achieve the above object, the invention provides the following technical scheme: a kind of high density karst intense development area is a full set of
Pipe perfusion pile construction method, includes the following steps:
Step 1: preparation of construction: the analogue technique of bored concrete pile, solution cavity, soil cave model based on BIM, by reconnoitring in detail
The report of stage geotechnical engineering investigation, tube wave detecting achievement, advance drilling and physical prospecting report, the stake design drawing provided in conjunction with designing unit
Paper establishes soil cave, solution cavity model using place function using the software of drawing three-dimensional complex object, three-dimensional using soil cave, solution cavity
Position is linked with bored concrete pile and bottom plate three-dimensional position, shows the three-dimensional position relationship of soil cave, solution cavity and bored concrete pile, bottom plate, is formulated
Out to known soil cave, solution cavity mortar depositing construction scheme before excavation；
Step 2: measure of pile position unwrapping wire: pile center's point coordinate is calculated according to the coordinate that design drawing provides, using total station
Setting-out on the spot is carried out according to ground polygon control survey point, and protects stake position central point；
Step 3: full circle swinging machine is in place: mobile full circle swinging drill machine with casing makes drill machine with casing holding tube device center to correct position
Corresponding stake position center；
Step 4: casing is placed in lifting: placement casing is put into the set with cutting edge in the case where major-minor fixture fully opens
Pipe；
Step 5: measurement adjustment verticality: being monitored with theodolite or plummet, and casing measures verticality situation after being held tightly,
And do micro adjustment；
Step 6: casing drilling is simultaneously grabbed except dregs: it covers effective positional cylinder and clamps, shake and push pile pipe, indentation, with grab bucket
Soil is taken out of casing, on one side grab soil, while continue push casing；
Step 7: the clear soil of casing drilling to designed elevation: the clear soil of casing drilling is until reach the absolute altitude being pre-designed；
Step 8: cleaning hole bottom sediment checks hole depth: removing mud；
Step 9: production steel reinforcement cage, and hang steel reinforcement cage: in steel reinforcement cage processing site, steel is processed by design specification requirement
Muscle cage after steel reinforcement cage shapes, is hung in place in stake holes；
Step 10: place conduit, casting concrete: conduit continuous pouring, casing buried depth use underwater concrete when perfusion
Perfusion construction；
Step 11: measurement concrete: the concrete after filling is measured；
Step 12: the displacement of full circle swinging jacketing machine: full circle swinging jacketing machine is removed.
As a preferred technical solution of the invention, the software of the drawing three-dimensional complex object is Autodesk
One of Civil 3d, Autodesk Revit, Autodesk 3d max.
As a preferred technical solution of the invention, the shake pushes pile pipe, compression distance 2.5-3.5m.
As a preferred technical solution of the invention, the conduit continuous pouring, the break period is no more than 45 minutes.
As a preferred technical solution of the invention, slump keeps 200mm at the solution cavity.
As a preferred technical solution of the invention, each drilled footage per shift of all casing drill are as follows: backfill layer 18-
22 meters；28-32 meters of layer of the earthwork；By force, middle weathered rock formation 2-5 meters.
Compared with prior art, the beneficial effects of the present invention are:
(1) using the analogue technique of bored concrete pile, solution cavity, soil cave model based on BIM, pass through detailed phase of exploration ground work
Journey exploration report, tube wave detecting achievement, advance drilling and physical prospecting report are used in conjunction with the stake design drawing that designing unit provides
Autodesk Revit establishes soil cave, solution cavity model using place function, using soil cave, solution cavity three-dimensional position and bored concrete pile and
The link of bottom plate three-dimensional position, shows the three-dimensional position relationship of soil cave, solution cavity and bored concrete pile, bottom plate, makes excavation
It is preceding to known soil cave, solution cavity mortar depositing construction scheme；
(2) it by the model established, finds the shallower solution cavity of unknown large volume and buried depth, safety is carried out to construction personnel
It tells somebody what one's real intentions are, and takes corresponding safety prevention measure, avoid safety accident, pass through soil cave, solution cavity model and drilled grout hole mould
Type compares, and can obtain the depth that each drilling is accurately crept into, and as the depth reference of drilled grout hole construction, reduces few brill and surpasses
It bores, and can obtain side's amount of grouting material, realize construction Precise control；
(3) drill machine with casing uses cutter head load automatic control system, when cutting hard rock, by the automatic control of computer,
Intelligent control casing shoe cutter head load and rotary torque are allowed to not change with the variation of casing wt and formation resistance, can
Cutter head is protected well and effectively improves stock-removing efficiency；
(4) pile, peculiar load-sensitive is perfused for solution cavity using the drilling control technology of " idling revolution " in Karst Cave Formation
It is " idle.
Detailed description of the invention
Fig. 1 is flow chart of the invention；
Specific embodiment
A kind of high density karst intense development area fully-sleeved filled pile construction method, includes the following steps:
Step 1: preparation of construction: the analogue technique of bored concrete pile, solution cavity, soil cave model based on BIM, by reconnoitring in detail
The report of stage geotechnical engineering investigation, tube wave detecting achievement, advance drilling and physical prospecting report, the stake design drawing provided in conjunction with designing unit
Paper, using the software of drawing three-dimensional complex object, the software of drawing three-dimensional complex object be Autodesk Civil 3d,
One of Autodesk Revit, Autodesk 3d max, by comparison, preferably Autodesk Revit studies Revit
Place, body can be used in the selection and feasibility analysis of solution cavity modeling pattern, the order that 3 D complex body is established in Revit
Amount, conventional model race, wherein it is too cumbersome to build complex object for scale of construction order, is not easy to control surface shape by boring point；Often
Scale race, which builds solution cavity model, need to first establish log sheet, and the column that respectively drilled by line establishes solution cavity body, and this method is to table
Up to the relatively good control of single solution cavity, but when drawing multiple solution cavities lines connection subjectivity it is big, and the solution cavity model formed is by more
A section composition, on morphological appearance with solution cavity is practical is not inconsistent, find that solution cavity model is built in place order can more embody by comparison
Form of the solution cavity in ground end, strong operability is easy to control to establish soil cave, solution cavity model using place function, utilizes soil cave, solution cavity
Three-dimensional position is linked with bored concrete pile and bottom plate three-dimensional position, shows the three-dimensional position relationship of soil cave, solution cavity and bored concrete pile, bottom plate,
It makes before excavation to known soil cave, solution cavity mortar depositing construction scheme；
Step 2: measure of pile position unwrapping wire: pile center's point coordinate is calculated according to the coordinate that design drawing provides, using total station
Setting-out on the spot is carried out according to ground polygon control survey point, and protects stake position central point, the operational procedure details of single pile: places roadbed
The stake position center base board that plate protects its central alignment is also known as guide table, length and width 4.5m, high 30cm, four corner sides
There is a lifting lug, main material is welded with the steel plate of 2cm thickness, its major function has had two o'clock following: pinpointing the work of guiding
With: after measuring pile center, the central point periphery for the stake that measuring goes out dug out with digging machine to the foundation pit of deep 30cm or so, then by roadbed
Plate is embedding wherein, allows the center of base board and the center of stake to overlap, casing will not sideslip when pile foundation construction；Improve the strong of roadbed
Degree, base board surfacing is special operation platform needed for all kinds of pile foundation constructions, it has certain thickness, is unlikely to deform,
Again because itself area is big, after ground face contact, the ground after being equivalent to hardening saves hard with certain bearing capacity
Concrete needed for changing, and solve the problems, such as foundation bearing；
Step 3: full circle swinging machine is in place: mobile full circle swinging drill machine with casing makes drill machine with casing holding tube device center to correct position
The corresponding base board center center Ji Zhuanwei；
Step 4: casing is placed in lifting: placement casing is put into the set with cutting edge in the case where major-minor fixture fully opens
Pipe steadily slowly should avoid it from colliding with host body, make its blade tip and ground after disposing casing during hanging casing
There are working space 150mm or so between face；
Step 5: measurement adjustment verticality: being monitored with theodolite or plummet, and casing measures verticality situation after being held tightly,
And micro adjustment is done, bury the 1st, Section 2 casing, it is necessary to which vertical, this is the key that determine vertical degree of the peg hole precision, is set on drilling machine
There is verticality device, it is ensured that borehole perpendicularity in construction corrects the angle of construction middle sleeve, with Section 1 casing group at any time
The 1st group of casing closed must keep very high precision, carefully be pressed into, the vertical precision of complete set of pipe pile is almost by the 1st group
The vertical precision of casing determines, the 1st group of casing install after with 2 theodolites or 2 groups of plummets from two orthogonal direction schools
Just its verticality, Bian Jiaozheng, Bian Huizhuan casing, side indentation, constantly check verticality；
Step 6: seven, eight: casing drilling and grab except dregs, the clear soil of casing drilling to designed elevation, cleaning hole bottom sediment,
Check hole depth: lifting first segment pipe is in stake machine jaw, the centering stake heart, the effective positioning oil of the steel bushing by bottom equipped with special cutter head
Cylinder clamps, and shakes and pushes pile pipe, and compression distance is about 2.5-3.5m, and soil is then taken out of casing with grab bucket, on one side grab it is native, while
Continue push casing, remain that casing base opening is ahead of depth≤2.5m of excavation face, compression distance depending on specific soil property,
If harder clay, head is not high, then pressure pipe depth can be reduced suitably；It is viscous if the high stream modeling of soft plastic clay or head
Soil, then pressure pipe depth can suitably deepen, and after first segment casing is all pressed into soil, more than ground stay 1.2-1.5m, in order to
Adapter tube, detect verticality, such as it is unqualified, carry out correction adjustment, as qualification if install the second section casing continue pushing take soil, such as
This continues, and native operation is grabbed in pause when construction is to scar, and notice management, owner, Di Kandeng relevant departments confirm scar, use after confirmation
Continue rock drilling operation to design requirement depth is met with the rock equipment Spiral digging machine that is nested, confirms supporting course；There is crack at whole hole metapore bottom
When water, is rushed under water with the distinctive ancillary equipment of whole-pipe cast-in-situ pile and grab come cleaning eye bottom sediment or taken with gas and return round-robin method；
It is the principle according to pressure equilibrium that gas, which takes and returns round-robin method,；Principle when whole hole metapore ground swell goes out stream plastic clay, according to equilibrium pressure
Enough water is injected into hole, inside and outside retaining hole after the balance of pressure, then is grabbed to fish for sediment or taken with gas with underwater punching and is returned circulation
Sediment is cleared up, the stream plastic clay in hole can be diluted to mud in the case where meeting water agitation, fill the water pressure inside and outside retaining hole on one side
Balance takes out mud with heavy slurry bucket on one side, until cleaning out, reinforms the examination of the relevant departments such as management, owner；After borehole cleaning such as
Actual apertures bottom absolute altitude with survey suggestion base absolute altitude and be consistent substantially, then no longer carry out pricker spy, if actual apertures bottom absolute altitude with survey and build
When view base absolute altitude is not consistent, require to make pricker spy processing according to geological survey units；
Step 9: production steel reinforcement cage, and hang steel reinforcement cage: in steel reinforcement cage processing site, design specification is pressed in steel reinforcement cage processing
It is required that steel reinforcement cage to be processed into the cage of two kinds of forms, pore-forming carries out placing steel reinforcement cage work, steel reinforcement cage processing after the assay was approved
After forming, in crane large arm job area, hang in stake holes in place, when steel reinforcement cage handling, should prevent torsion, bending, slowly under
It puts, avoids collision steel bushing tube wall, steel reinforcement cage is using lifting, and another length of reinforcing cage is more than 9m using overlap joint, and overlap joint welding meets
Code requirement, according to practical geological condition, for steel reinforcement cage after special processing, measuring the pouring side of concrete can be opposite at solution cavity
Control；
Step 10: place conduit, casting concrete: concrete uses Shang Tong factory C30 commerical ready-mixed concrete, using leading in construction
Continuous pouring is perfused in pipe, and the break period is no more than 45 minutes, and conduit must not collide steel reinforcement cage when being promoted, and steel sleeve is filled with concrete
Note paragraph by paragraph on pull out, rise to pull out casing and should shake and pull out slowly, retaining sleeve is straight, casing buried depth 2-6m, and slump is use up at solution cavity
Amount keeps 200mm or so, is commonly called as backhander engineering method using the construction of underwater gliders method when perfusion, to avoid hole wall collapse, one
Side pour concrete one side tube drawing, retaining sleeve do not extract concrete surface, until concreting is all extracted to effective stake top casing,
The geological hydrology condition of report display is surveyed in base area, in conjunction with construction machinery situation, execution conditions under normal circumstances, every full set
The each drilled footage per shift of pipe drilling machine are as follows: layer 18-22 meters of backfill；28-32 meters of layer of the earthwork；By force, middle weathered rock formation 2-5 meters；Solution cavity is met,
Rear secondary drilling need to be tamped or directly make retaining wall grout with steel pile casting；
Step 11: measurement concrete: the concrete after filling is measured；
Step 12: the displacement of full circle swinging jacketing machine: full circle swinging jacketing machine is removed.
Software function contrast table
Key problem in technology control point:
The control of the verticality of stake: verticality carries out stringent control, meets code requirement, to control in pore forming process
The verticality of stake, it is necessary to do a good job of it the work of following two link: the straight degree inspection and correction of casing: casing march into the arena before to its into
Row alignment, it is ensured that Construction of Engineering Pile verticality；The verticality of stake in pore forming process is monitored and is checked；The monitoring of ground verticality:
Ground selects two mutually orthogonal directions using the verticality of the casing of plumb bob monitoring ground above section, and discovery deviation is at any time
It corrects, this detection should be adhered to all along in the pore forming process of every pile, cannot interrupt；Verticality inspection in hole: every section
Before casing installs lower casing joint after having pressed, all needing to stop carries out in hole that verticality inspection is using inspection in plumb bob hole, no
It need to rectify a deviation when qualified, until qualified just can be carried out next section set pipe construction；Whole hole perpendicularity inspection: complete in every pile pore-forming
Finish, it is necessary to carry out measuring for verticality, two mutually orthogonal directions is selected to measure.
Cutter head load automatic control system: drill machine with casing uses cutter head load automatic control system, when cutting hard rock, leads to
The automatic control of computer, intelligent control casing shoe cutter head load and rotary torque are crossed, is allowed to not with casing wt and formation resistance
Variation and change, can be good at protecting cutter head and effectively improve stock-removing efficiency.
Karst Cave Formation " idling revolution ": Karst Cave Formation is perfused using the drilling control technology of " idling revolution " for solution cavity
Pile, peculiar load-sensitive " idling drilling " function, retaining sleeve low speed rotation, it is automatic up and down, avoid be in the milk super side, broken pile.
Verticality correction: in whole-pipe cast-in-situ pile pore forming process as discovery perpendicularity deviation it is excessive, it is necessary in time into
Row correction adjustment, the common method of correction have: being rectified a deviation using drill oil cylinder, if deviation is not more than or casing buries not
Deep, 5m or less can reach directly using the verticality of two jacking cylinders and two push cylinder adjusting sleeve pipes of drilling machine
The purpose of correction backfills the earthwork, tube drawing re-calibrates, or according to practical geology if deviation is excessive or casing buries relatively deeply
Situation is in former stake position periphery pilot hole.
Solution cavity, back filled region processing and the processing of underground obstacle: to solve the uncontrollability of concreting amount therefore to steel
Muscle cage carries out special processing: wrapping up iron sheet on the outside of steel reinforcement cage, the thickness of iron sheet is selected according to the depth in hole and the height of solution cavity
Degree and package section, between iron sheet and steel reinforcement cage protective layer distance 2cm use again spiral bar or it is other have certain rigidity and tension
The good material of performance is on the outside of iron sheet plus ties up, and forms double-jacket tube form；The processing flow of steel reinforcement cage package iron sheet: to solve coagulation
The uncontrollability of the soil amount of pouring thus special processing is carried out to steel reinforcement cage: iron sheet is wrapped up on the outside of steel reinforcement cage, according to the depth in hole and
The height of solution cavity come select iron sheet thickness and package section, protective layer distance 2cm uses spiral bar again between iron sheet and steel reinforcement cage
Or other materials good with certain rigidity and tensile property on the outside of iron sheet plus are tied up, and double-jacket tube form is formed；Overcome steel reinforcement cage
Floating rising of steel cage refers to since the gap between internal surface of sleeve pipe and steel reinforcement cage outer rim is smaller, it is upper pull out casing when, steel
Muscle cage is possible to sleeve with floating together, exactly, should be known as " hanging cage " of steel reinforcement cage, this is because steel reinforcement cage is vertical
It is up subjected to displacement, it with steel reinforcement cage is the factor analyzed except object that actual cause, which is due to the external world, such as in casing, concrete
The reasons such as coarse aggregate steel reinforcement cage is mechanically tangled or is blocked, and then moved up as external constraint is up walked, influence
There are many reason, and precautionary measures mainly have: the aggregate size of reinforced concrete pile concrete should be as small as possible, not preferably greater than 20mm；Reinforcing bar
One block of sheet metal or reinforced concrete block more smaller than steel reinforcement cage diameter burn-on to increase its anti-floating ability in cage bottom portion；It must at hole perpendicularity
Design and code requirement must be reached；Fabrication of reinforcing cage must satisfy design specification requirement, according to the size of stake diameter: 800mm,
1000mm；General steel reinforcement cage and steel reinforcement cage maximum outside diameter≤660mm, the 860mm especially handled；Concrete slump 18-20cm, and easily
Property must reach design specification requirement, when pouring concrete, conduit sealing must be intact, and guarantees depth of tremie, by underwater irrigation technology,
Before placing concrete, the length of placement catheter is from bottom hole 30-60cm；When pouring, 2-6m in depth of tremie concrete is kept.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of high density karst intense development area fully-sleeved filled pile construction method, which comprises the steps of:
Step 1: preparation of construction: the analogue technique of bored concrete pile, solution cavity, soil cave model based on BIM passes through detailed phase of exploration
Geotechnical engineering investigation report, tube wave detecting achievement, advance drilling and physical prospecting report, in conjunction with designing unit provide stake design drawing,
Using the software of drawing three-dimensional complex object, soil cave, solution cavity model are established using place function, utilizes soil cave, solution cavity three-dimensional position
It sets and is linked with bored concrete pile and bottom plate three-dimensional position, show the three-dimensional position relationship of soil cave, solution cavity and bored concrete pile, bottom plate, make
To known soil cave, solution cavity mortar depositing construction scheme before excavation；
Step 2: measure of pile position unwrapping wire: according to design drawing provide coordinate calculate pile center's point coordinate, using total station according to
Surface traverse control point carries out setting-out on the spot, and protects stake position central point；
Step 3: full circle swinging machine is in place: mobile full circle swinging drill machine with casing to correct position keeps drill machine with casing holding tube device center corresponding
Stake position center；
Step 4: casing is placed in lifting: placement casing is put into the casing with cutting edge in the case where major-minor fixture fully opens；
Step 5: measurement adjustment verticality: being monitored with theodolite or plummet, and casing measures verticality situation after being held tightly, and does
Micro adjustment；
Step 6: casing drilling is simultaneously grabbed except dregs: it covers effective positional cylinder and clamps, shake and push pile pipe, indentation, with grab bucket from set
Soil is taken in pipe, on one side grab soil, while continue push casing；
Step 7: the clear soil of casing drilling to designed elevation: the clear soil of casing drilling is until reach the absolute altitude being pre-designed；
Step 8: cleaning hole bottom sediment checks hole depth: removing mud；
Step 9: production steel reinforcement cage and hangs steel reinforcement cage: in steel reinforcement cage processing site, by design specification requirement screwing steel bars cage,
After steel reinforcement cage shapes, hang in place in stake holes；
Step 10: place conduit, casting concrete: conduit continuous pouring, casing buried depth use underwater gliders when perfusion
Method construction；
Step 11: measurement concrete: the concrete after filling is measured；
Step 12: the displacement of full circle swinging jacketing machine: full circle swinging jacketing machine is removed.
2. a kind of high density karst intense development area fully-sleeved filled pile construction method according to claim 1, special
Sign is: the software of the drawing three-dimensional complex object is Autodesk Civil 3d, Autodesk Revit, Autodesk
One of 3d max.
3. a kind of high density karst intense development area fully-sleeved filled pile construction method according to claim 1, special
Sign is: the shake pushes pile pipe, compression distance 2.5-3.5m.
4. a kind of high density karst intense development area fully-sleeved filled pile construction method according to claim 1, special
Sign is: the conduit continuous pouring, and the break period is no more than 45 minutes.
5. a kind of high density karst intense development area fully-sleeved filled pile construction method according to claim 1, special
Sign is: slump keeps 200mm at the solution cavity.
6. a kind of high density karst intense development area fully-sleeved filled pile construction method according to claim 1, special
Sign is: each drilled footage per shift of all casing drill are as follows: layer 18-22 meters of backfill；28-32 meters of layer of the earthwork；By force, middle weathered rock formation
2-5 meters.
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| CN110593255A (en) * | 2019-08-29 | 2019-12-20 | 中电建十一局工程有限公司 | Full-casing secant pile construction method suitable for sandy gravel soil layer |
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| CN114837209A (en) * | 2022-05-19 | 2022-08-02 | 中铁三局集团第二工程有限公司 | Construction method of deep sand layer large-diameter pile foundation in karst development area |
| CN115369867A (en) * | 2022-08-18 | 2022-11-22 | 广州市第二建筑工程有限公司 | BIM-based lead hole pile sinking construction method |
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| CN111709614A (en) * | 2020-05-27 | 2020-09-25 | 中国电建集团华东勘测设计研究院有限公司 | Seven-step quality management method for pile foundation based on BIM model |
| CN112597572A (en) * | 2020-12-17 | 2021-04-02 | 中国十九冶集团有限公司 | BIM technology-based pile foundation soil penetration depth determination method |
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| CN113653150B (en) * | 2021-09-17 | 2023-01-24 | 北京城乡建设集团有限责任公司 | Construction method for drilling through sewage pipeline by rotary drilling machine |
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| CN115369867A (en) * | 2022-08-18 | 2022-11-22 | 广州市第二建筑工程有限公司 | BIM-based lead hole pile sinking construction method |
| CN115404850A (en) * | 2022-10-09 | 2022-11-29 | 中铁一局集团天津建设工程有限公司 | Steel reinforcement cage for cast-in-place concrete pile and construction method of cast-in-place concrete pile |
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