CN105887814A - Rotary excavating rock-embedded pedestal pile construction method - Google Patents
Rotary excavating rock-embedded pedestal pile construction method Download PDFInfo
- Publication number
- CN105887814A CN105887814A CN201610247705.2A CN201610247705A CN105887814A CN 105887814 A CN105887814 A CN 105887814A CN 201610247705 A CN201610247705 A CN 201610247705A CN 105887814 A CN105887814 A CN 105887814A
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- China
- Prior art keywords
- hole
- reaming
- scarfing cinder
- drilling
- rotary excavating
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
Abstract
The invention discloses a rotary excavating rock-embedded pedestal pile construction method. The rotary excavating rock-embedded pedestal pile construction method comprises the steps of rotary excavating drilling, drilling bucket slag removing and concrete pouring, specifically, repeated perforating and hole expanding processes are conducted through a rotary excavating drilling machine, perforated holes are equal in diameter, and perforating and hole expanding are conducted alternately; and drilling bucket slag removing is conducted by lifting and cleaning slurry in the holes through a flat bottom slag removing drilling bucket for three to five times. According to the rotary excavating rock-embedded pedestal pile construction method, rotary excavating mechanical perforating is adopted, the construction efficiency is high, the cost is low, and the construction quality is reliable; a pedestal expanding straight-line segment can be formed through the hole expanding method, and the rock-embedded effect can be formed; hole expanding can be segmentedly conducted in the mode that hole guiding is conducted at first, and then hole expanding is conducted, so that power provided by the torque and a power head of a drill pipe in the pedestal expanding process is greatly reduced, and a large-diameter pedestal expanding segment can be achieved; the slag removing method can effectively remove deposited slag in the hole bottoms including the perforated parts; and the rotary excavating rock-embedded pedestal pile construction method is not influenced by underground water, the hole diameter, the hole depth and other conditions, the construction noise is small, the disturbance to the surrounding environment is small, and the application range is wider.
Description
Technical field
The invention belongs to technical field of building construction, relate to a kind of construction method being applied to pile foundation engineering,
It is applicable to the rotation that supporting course is soft rock strata digs pedestal pile constructing process particularly to a kind of.
Background technology
For embedding rock club-footed pile, the general method using artificial base expanding and base expanding.Artificial base expanding and base expanding method often by stratum,
Subsoil water and aperture, hole depth restriction, pore-forming need to use a large amount of armored concrete to do retaining wall, cause not
The serious waste of Renewable resource, pore-forming cost is high；Manual pore-forming exists the most hidden simultaneously
Suffering from, the personal safety of serious threat workman, construction efficiency is relatively low.Therefore, along with foundation pile construction warp
The continuous accumulation tested, and the research of all kinds of novel device, technology and application, it is desirable to have new embedding rock
Pedestal pile constructing process replaces tradition pedestal pile constructing process.
Summary of the invention
The problem to be solved in the present invention be aiming at above not enough provide a kind of full pile body mechanization pore-forming,
Reaming sector hole type is prone to the Novel rotary ensured, construction quality is good, work efficiency is high, safe and reliable, cost is low
Dig embedding rock hole-expanding pile construction method；The inventive method, and can be according to different base expanding and base expanding not by influence on groundwater
Basis pile-type selects different-diameter drilling work.
The present invention is achieved through the following technical solutions:
Embedding rock pedestal pile constructing process is dug in a kind of rotation, waters including rotary digging drilling hole, drilling bucket scarfing cinder and concrete
Build.
Specifically include following processing step:
One, rotary digging drilling hole uses repeatedly pore-forming, chambering process；
1, pore-forming: first use Guan Bi bucket (double open) drill bit equal diameter drill to proceed to supporting course.
2, reaming: then change reaming bit and strut the reaming blade of drill bit and be allowed to rotary cutting stratum and expand
Big hole wall, after reaming aperture puts in place, drill bit is automatically to UR, when creeping into difficulty, stops reaming,
Change the drill bit of a little specification than reamer chassis into carry out scarfing cinder and draw hole, draw hole depth less than setting
The meter degree of depth.Draw after hole completes, then change reaming bit into, after UR, reaming, embedding rock can be formed
The required straight line reaming section of stake.If reaming section is longer, then segmentation is needed to carry out reaming.After reaming completes, hole
Bottom perimeter forms inclined-plane.
3, Pore Diameter Detection: after reaming completes, detects pore-forming pass, detection content include aperture,
Reaming section height.
Two, scarfing cinder uses 3～5 flat scarfing cinder drilling bucket cleanings to propose mud in hole；
4, drilling bucket scarfing cinder: before scarfing cinder, adds water in hole, proposes mud in hole with flat scarfing cinder drilling bucket,
Owing to being inclined-plane at the bottom of reaming periphery hole, upper carry scarfing cinder bucket during, utilize negative pressure, make reaming section week
Center at the bottom of the sediment access aperture on limit, in clear hole makes hole repeatedly, dregs reduces, and generally need to remove 3～5 times,
Can be less to dregs in hole clearly.
5, sediment detection: after scarfing cinder completes, sediment at the bottom of hole is detected, sediment meets design requirement,
Lower step operation can be carried out.
6, secondary scarfing cinder: before transferring steel reinforcement cage, again to carrying out scarfing cinder at the bottom of stake.
Three, concreting；
7, steel reinforcement cage is installed: after scarfing cinder completes.Use crane immediately that reinforcing bar cage hoisting is in place, lay
Position, hole should be directed at, hang and directly hold up steady, slowly put down, it is to avoid collision hole wall and free-falling, in place after should
Fix immediately.
8, placing concrete: by underwater casting mode casting concrete, when the water is insufficient, add in hole
Water, should ensure that and be preferably 300mm-500mm to the distance at the bottom of hole bottom conduit, during first penetration concrete,
Should there be enough storage levels, below Transducers Embedded in Concrete perfusion face of conduit, should not be less than 0.8m, perfusion
Underwater concrete must be constructed continuously, and last groundwater increment should control, and the super height that fills is preferably
0.8m-1.0m。
Compared with prior art, the invention have the advantages that:
1, the present invention uses rotary drilling machinery pore-forming, and efficiency of construction is high, low cost, reliable construction quality.
2, the expanding method that the present invention uses, it is possible to form base expanding and base expanding straightway, the effect of embedding rock can be formed.
3, the present invention uses and draws Kong Houzai reaming, if reaming section is longer, then needs segmentation to carry out reaming, this
The power that sample greatly reduces the moment of torsion of drilling rod during base expanding and base expanding and unit head provides, it is possible to achieve bigger
The base expanding and base expanding section of diameter.
4, the clinker removal method that the present invention uses, can sediment at the bottom of cleaning hole effectively, including reaming part.
5, the present invention is not affected by conditions such as subsoil water, aperture, hole depths, and construction noise is little, to periphery
Environmental perturbation is few, and range of application is the most extensive.
Accompanying drawing explanation
Fig. 1 reaming procedure schematic diagram；
Fig. 2 scarfing cinder principle schematic.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further described, and detailed description of the invention is to this
Further illustrating of bright principle, limits the present invention never in any form, skill same or like with the present invention
Art is without departing from the scope of protection of the invention.
In conjunction with accompanying drawing 1 and Fig. 2.
1, construction technology process
Preparation of construction → stake holes unwrapping wire location → perforation of boring machine → continue creeps into, deslagging, pore-forming → be drilled into
Supporting course → discriminating stratum → creep into again downwards → reaming → draw downwards hole is to designing the reaming of hole depth → more extremely
Add water in projected depth → scarfing cinder bucket scarfing cinder → pass detection → hole → scarfing cinder again → sediment detection (if
Heavy quarrel is unsatisfactory for adding water at present scarfing cinder) → wait that placing concrete → secondary mechanical is cut clearly → lower reinforcing bar
Cage → casting concrete.
2, key points for operation
(1) rig location: the coordinate, the relevant data such as elevation that first provide design drawing are carried out conscientiously
Check, confirm that errorless rear employing total powerstation carries out the setting-out of stake position, after pile center's setting-out, along stake
The heart draws cross hairs to beyond 1.5m and perform fender pile labelling.
(2) perforate: perforate can be carried out after completing pile foundation site localization.Drilling equipment is in place, rise act bores
Bar, installing drilling bucket, adjust drilling rod perpendicularity, alignment stake holes center, then start carries out rotation and takes soil
Perforate is that steel pile casting is embedding prepares.Casing end face is measured with level instrument after steel pile casting installation
Elevation is also marked, for drilling depth and the auxiliary measuring of concreting height.
(3) creep into and fetch earth: after borer drill rod is turned back to stake holes position, drilling bucket vertically put down and start to turn
Moving and fetch earth, how many according to height and test and judge drilling bucket being filled soil under drilling rod, a bucket should be first before unloading soil
Reversely rotate 2 weeks and utilize friction that movable floor is closed charging aperture, can slowly drilling bucket be promoted afterwards
And remove casing and unload soil.Rising or falling speed should not be too fast, should be maintained at about 0.4m/s.
(4) reaming: after boring to design supporting course, change drill bit into reaming bit, put into hole to two
Side opening wall reaming, after reaming aperture puts in place, drill bit is automatically to UR, when creeping into difficulty, stops
Reaming, changes a little specification and drill bit than reamer chassis into and carries out scarfing cinder and draw hole, draw hole depth not
Exceed projected depth.After completing after drawing, then change reaming bit into, if reaming section is longer, then need segmentation
Carry out reaming.
(5) pass detection: after reaming completes, pore-forming pass is detected, detection content include aperture,
Reaming section height.Before construction, pass detection device is demarcated.
(6) scarfing cinder
During clear hole, first with flat scarfing cinder drilling bucket, boring mud in hole is cleaned out, the completeest after, add clear water,
Adding the most about 1.5m, be repeatedly lifted up no less than 3 times up and down with cleanout bit in hole, wash clean expands
Hole section mud cake on the wall of borehole.Again the water in hole and the clear bottom bucket of mud that washes out are cleaned out aperture, behind clear hole,
Detection sediment, it is ensured that sediment thickness≤5cm at the bottom of hole.
(7) sediment detection
Utilize paddle type mill Settled-material detection apparatus that the sediment at the bottom of hole is detected.If sediment thickness is less than 50mm.
Lower construction together can be carried out.As being unsatisfactory for code requirement, then need artificial clear hole.Sediment detection uses hammer
Hit formula Settled-material detection apparatus the sediment at the bottom of hole is detected.Detection at twice, is clear at machinery for the first time
Behind complete hole, second time is before pouring concrete.
(6) secondary scarfing cinder
Before descending reinforcing cage, again with flat scarfing cinder bucket again to carrying out scarfing cinder at the bottom of hole, the completeest after immediately under
Put steel reinforcement cage, casting concrete.
(8) steel reinforcement cage is transferred
Steel reinforcement cage uses crane once to lift in place.Deformation should be prevented when carrying and lifting, lay reply
Position, quasi-hole, hangs and directly holds up steady, slowly put down, it is to avoid collision hole wall and free-falling, in place after should be immediately
Fixing.
(9) casting concrete
During underwater casting mode casting concrete, should ensure that bottom conduit to the distance at the bottom of hole be preferably
300mm-500mm, during first penetration concrete, should have enough storage levels, and coagulation once imbedded by conduit
Soil should not be less than 0.8m below perfusion face, and pouring underwater concrete must be constructed continuously, be filled for the last time
Fluence should control, and the super height that fills is preferably 0.8m-1.0m.
As it is shown in figure 1, Fig. 1 is reaming procedure schematic diagram, in each figure of Fig. 1: 1 is severely-weathered layer, 2
Being middle weathered layer, 3 is boring mud in hole, and 4 is muddy water in hole, and 5 is equal diameter hole, and 6 is reaming；Figure
1A is equal diameter hole pore-forming view, and Figure 1B is reaming view, Fig. 1 C be draw poroid
State schematic diagram, Fig. 1 D is reaming view again.Pore forming process is illustrated from Figure 1A to Fig. 1 D.
As in figure 2 it is shown, Fig. 2 is scarfing cinder principle schematic, in each figure of Fig. 2,1 is severely-weathered layer, 2
Being middle weathered layer, 3 is boring mud in hole, and 4 is muddy water in hole, and 5 is equal diameter hole, and 6 is reaming, and 7 are
Flat scarfing cinder drilling bucket；Fig. 2 A is pass schematic diagram after reaming, and Fig. 2 B is first time scarfing cinder schematic diagram,
Fig. 2 C is schematic diagram after scarfing cinder for the first time, and Fig. 2 D is second time scarfing cinder, and Fig. 2 E is that second time is clear
Schematic diagram after slag, Fig. 2 F is third time scarfing cinder schematic diagram；Scarfing cinder is illustrated from Fig. 2 A to Fig. 2 F
Journey.
Claims (4)
1. embedding rock pedestal pile constructing process is dug in a rotation, it is characterised in that:
Including rotary digging drilling hole, drilling bucket scarfing cinder and concreting step:
Rotary digging drilling hole uses rotary drilling rig repeatedly pore-forming, chambering process；Wherein pore-forming is equal diameter hole, and pore-forming is with reaming alternately；
Drilling bucket scarfing cinder uses 3～5 flat scarfing cinder drilling bucket cleanings to propose mud in hole.
2. dig embedding rock pedestal pile constructing process according to claim 1 rotation, it is characterised in that:
Described pore-forming is to use the double first-class diameter that spuds in of Guan Bi bucket to creep into supporting course；
Described reaming is to change reaming bit after pore-forming to strut the reaming blade of drill bit and be allowed to rotary cutting stratum and expand hole wall, after reaming aperture puts in place, drill bit is automatically to UR, when creeping into difficulty, stop reaming, change the drill bit of a little specification than reamer chassis into carry out scarfing cinder and draw hole, draw hole depth less than projected depth；Draw after hole completes, then change reaming bit into and carry out reaming and complete an alternate cycles；After reaming completes, hole bottom perimeter forms inclined-plane.
3. dig embedding rock pedestal pile constructing process according to claim 1 rotation, it is characterised in that:
Described drilling bucket scarfing cinder includes: before scarfing cinder, add water in hole, and flat scarfing cinder drilling bucket proposes mud in hole, utilizes inclined-plane at the bottom of reaming periphery hole, upper carry scarfing cinder bucket during, make center at the bottom of sediment access aperture, in clear hole makes hole repeatedly, dregs reduces, and removes 3～5 times；After scarfing cinder completes, sediment at the bottom of hole is detected.
4. dig embedding rock pedestal pile constructing process according to claim 1 rotation, it is characterised in that:
Described concreting includes: install steel reinforcement cage, placing concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610247705.2A CN105887814A (en) | 2016-04-19 | 2016-04-19 | Rotary excavating rock-embedded pedestal pile construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610247705.2A CN105887814A (en) | 2016-04-19 | 2016-04-19 | Rotary excavating rock-embedded pedestal pile construction method |
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| Publication Number | Publication Date |
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| CN105887814A true CN105887814A (en) | 2016-08-24 |
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| CN201610247705.2A Pending CN105887814A (en) | 2016-04-19 | 2016-04-19 | Rotary excavating rock-embedded pedestal pile construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110468833A (en) * | 2019-08-19 | 2019-11-19 | 江苏路航建设工程有限公司 | Drilled grouting piles under water constructing device and its application method for cruiseway |
| WO2022095548A1 (en) * | 2020-11-04 | 2022-05-12 | 成都欣皓地基基础工程有限责任公司 | Square pile construction method and device for rotary drilling rig |
| CN114555888A (en) * | 2021-01-04 | 2022-05-27 | 成都欣皓地基基础工程有限责任公司 | Square pile construction method and equipment for rotary drilling rig |
| CN115233660A (en) * | 2022-07-25 | 2022-10-25 | 中国建筑一局(集团)有限公司 | High-strength concrete and engineering pile enlarged footing construction process applying same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468833A (en) * | 2019-08-19 | 2019-11-19 | 江苏路航建设工程有限公司 | Drilled grouting piles under water constructing device and its application method for cruiseway |
| CN110468833B (en) * | 2019-08-19 | 2020-11-27 | 江苏路航建设工程有限公司 | Water cast-in-situ bored pile construction device for inland waterway and use method thereof |
| WO2022095548A1 (en) * | 2020-11-04 | 2022-05-12 | 成都欣皓地基基础工程有限责任公司 | Square pile construction method and device for rotary drilling rig |
| US11891892B2 (en) | 2020-11-04 | 2024-02-06 | Chengdu Xinhao Foundation Engineering Co., Ltd. | Square pile construction method and equipment of a rotary drilling rig |
| CN114555888A (en) * | 2021-01-04 | 2022-05-27 | 成都欣皓地基基础工程有限责任公司 | Square pile construction method and equipment for rotary drilling rig |
| CN114555888B (en) * | 2021-01-04 | 2023-01-31 | 成都欣皓地基基础工程有限责任公司 | Square pile construction method and equipment for rotary drilling rig |
| CN115233660A (en) * | 2022-07-25 | 2022-10-25 | 中国建筑一局(集团)有限公司 | High-strength concrete and engineering pile enlarged footing construction process applying same |
| CN115233660B (en) * | 2022-07-25 | 2024-02-02 | 中国建筑一局(集团)有限公司 | High-strength concrete and engineering pile enlarged head construction process using same |
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Application publication date: 20160824 |