CN106638603A - Pipe pile core pulling device and pile core pulling method thereof - Google Patents
Pipe pile core pulling device and pile core pulling method thereof Download PDFInfo
- Publication number
- CN106638603A CN106638603A CN201611254634.5A CN201611254634A CN106638603A CN 106638603 A CN106638603 A CN 106638603A CN 201611254634 A CN201611254634 A CN 201611254634A CN 106638603 A CN106638603 A CN 106638603A
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- CN
- China
- Prior art keywords
- core
- funnel
- stake
- soil
- pile
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/08—Removing obstacles
-
- 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
- E02D5/58—Prestressed concrete piles
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- 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)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a core pulling device and a core pulling method thereof, particularly relates to a pipe pile core pulling device and a pile core pulling method thereof and belongs to the technical field of machineries. The structure of the pipe pile core pulling device comprises an air compressor, wherein the air compressor comprises a funnel soil taking machine and an operation connection rod; an air compression pipe of the air compressor is connected with the operation connection rod; the operation connection rod passes through the funnel soil taking machine and is connected with the bottom of the funnel soil taking machine. The pile core pulling device and the core pulling method thereof are disclosed in allusion to the problem of pile core pulling construction on the basis of extensive construction of pre-stressed pipe piles; the pile core pulling device is capable of removing soil in the pipe piles, removing hard solids such as stones in the pile cores, taking out the broken stones in narrow space of the pipe piles, reducing extrusion on the side walls of the piles during exploding and taking out soil and sludge in the pipe piles, and is high in soil removal quality, high in construction efficiency and simple and rapid to operate.
Description
Technical field
The present invention relates to one kind draws core apparatus and its draws core method, more particularly to a kind of pile tube draws a core apparatus and its draws stake
Core method, belongs to field of mechanical technique.
Background technology
Prestressed concrete pipe pile has the advantages that low cost, easy construction, in waterwork, industrial building, civilian builds
Build and be widely applied in bridge foundation engineering, if prestressed pipe pile foundation is provided without shoe and pile cover, need to carry out
Draw the pouring construction of a core and inner concrete.Pile tube inner concrete is except improving construction and the stress condition of stake top
Outward, shearing resistance also can be played a role, its depth and quality for drawing a core directly affect the perfusion depth of inner concrete and
Quality, so as to affect the transmission of its bearing capacity, withdrawal resistance.Or pile foundation adopts the form of construction work of " first cut the earth and drive piles afterwards ", when
Earthwork construction is in rainy season again, just need to build the unearthed passage of slag laying with hard, just fall into such part pile tube endoporus a large amount of
The block hard objects such as stone, fragment of brick, its core is blocked, bring to the follow-up pouring for drawing a core and inner concrete
Very big difficulty.
The content of the invention
The purpose of the present invention is the defect existed for prior art, proposes that a kind of pile tube draws a core apparatus and its draws a core
Method, quickly and easily completes the clear geotechnique of a core and makees, it is ensured that work progress it is safe and efficient.
Present invention firstly provides a kind of pile tube draws a core apparatus, a kind of pile tube draws a core apparatus, including air compressor machine, the sky
Press funnel soil sampler and operation connecting rod, it is characterised in that：The pneumatic tube attended operation connecting rod of the air compressor machine, the behaviour
Make connecting rod and be connected through funnel soil sampler and with the silk tooth joint of the bottom setting of funnel soil sampler.It is former according to buoyancy, funnel
Reason, is scooped into rubble, soil in funnel device using water buoyancy and air pressure, and stone, soil are taken out.This device can not only be in pipe
Chisel crushed stone, extruding when reduction is abolished to stake side wall, moreover it is possible to take out soil in pile tube, mud, clearly are taken out in stake narrow space
Soil property amount is high, efficiency of construction is high, simple and quick.
The pneumatic tube of operation connecting rod and the air compressor machine, funnel soil sampler are connected for silk tooth, described to operate connecting rod two
End is fixed by the rotation of silk tooth.
The operation connecting rod is formed with the PPR pipe of outer silk tooth for two ends, and the pipe has enough intensity, pliability and hollow
Meet pneumatic conveying, it is ensured that action bars can easily go deep into stake in-core, meet pneumatic conveying and operation is required.
The upper end open of the funnel soil sampler, bottom lock, containing three-level step, the bore of every grade of step is from top to bottom
Successively decrease step by step, connected by silk tooth between every grade of step.
The first order step bore of the funnel soil sampler is 200mm, second level step bore is 100mm, third level platform
Rank bore is 50mm, and each rank is highly 50mm.Rubble, the soil that to fall into funnel with water " boiling " etc. is conducive to take out,
Screw thread between each step, can be according to the flexible connection disassembling of caliber size.Bottommost single order is connected with clear native bar, interface
It is equipped with screw thread, it is ensured that it is reliably connected.The funnel soil sampler side wall and bottom be provided with hole uniformly at intervals, aperture Φ
5mm, spacing 30mm, it is ensured that water energy quickly flows out, bottommost single order is connected after closing with rod member, constitutes complete funnel and fetches earth
Device.
The present invention further provides pile tube draws a core method, comprise the following steps：
The first step, the clear soil height of design, dig the broken stone for getting lodged in an in-core, with the pneumatic pick with the drilling rod of stake core dimensional fits
The stone of the broken stake in-core of layering chisel；
Second step, take out stake in-core and dig broken stone, first inject water in stake in-core, reuse pile tube and draw a core apparatus and take
Soil；
3rd step, repeat the first step and second step to the clear native height for reaching design by stake side wall, pile crown cleaning and dirty
Water is extracted out, and pile tube side wall and pile crown are cleaned with giant, after first pile crown is cleaned up, then rinses a side wall mud
Soil, after cleaning up, sewage pump by pipe mud extract out, circulation flushing inwall, be finally reached pile crown, stake core side wall cleaning,
Without soil.
In the first step of said method, clear soil height H=design height+0.5m, during layering chisel crushed stone, per layer cuts depth
Degree≤30mm, drilling rod intersects drop point into quincunx spacing 30mm when cutting, and ballast grain sizes are controlled in 30mm～50mm.
In the second step, when fetching earth, after funnel soil sampler, operation connecting rod are connected with air compressor machine, control air pressure is 0.3
～0.5MPa, stretches into an in-core, treats that funnel soil sampler is expired by stake in-core water logging, and the water management of stake in-core is flooding rubble 300mm
～500mm, starts and toward the agitation of stake core bottom, bottom rubble is fallen into funnel with waterborne floating, and operates continuously 3-5min, will leak
Bucket soil sampler is extracted, and completes once to fetch earth.
Height control is fetched earth every time in 290-320mm, preferred 300mm.
The present invention draws a difficult problem for core construction for it on the basis of prestressing pipe pile construction is wide, and proposition is drawn
Stake and draws core method at core apparatus, can remove the soil in pile tube, can also remove the rigid solids such as a core energy stone, can not only be
Chisel crushed stone is taken out in pile tube narrow space, the extruding to stake side wall when abolishing is reduced, moreover it is possible to take out soil in pile tube, mud,
Clear soil property amount is high, efficiency of construction is high, simple and quick.
Description of the drawings
Fig. 1 draws a core (funnel soil sampler) construction process for pile tube.
Fig. 2 draws the structural representation of a core apparatus for pile tube.
Fig. 3 is the structural representation of funnel soil sampler.
Specific embodiment
Embodiment
As shown in Figure 1-Figure 3, pile tube draws a core apparatus, including air compressor machine 1, the He of air compressor machine funnel soil sampler 3 to the present embodiment
Operation connecting rod 4, the attended operation connecting rod 4 of pneumatic tube 2 of air compressor machine, operation connecting rod 4 passes through funnel soil sampler 3 and and funnel
The silk tooth joint connection that the bottom of soil sampler is arranged.Operation connecting rod 4 is connected with the pneumatic tube 2 of air compressor machine for silk tooth, action bars 4
It is connected 6 by inside and outside silk tooth with funnel soil sampler 3.Operation connecting rod 4 is formed with the PPR pipe of outer silk tooth for two ends, caliber Φ 25,
After PPR pipe and air compressor machine connection, air-flow is extruded from funnel bottom.The built-in silk tooth in air compressor machine tracheae termination junction, PPR pipe is external
Silk tooth, after tracheae is connected with action bars silk tooth, then is blocked with dop 5.The upper end open of funnel soil sampler, bottom lock, contain
Three-level step, the bore of every grade of step from top to bottom successively decreases step by step, is connected by silk tooth between every grade of step.Funnel soil sampler
The bore of first order step 7 is 200mm, the bore of second level step 8 is 100mm, the bore of third level step 9 is 50mm, each rank height
It is 50mm.There is bottommost single order to be connected with clear native bar, bottommost single order end 30mm arranges internal thread tooth and is connected with action bars
(action bars is away from end 60mm scope peripheral hardware silk teeth), it is ensured that it is reliably connected.In the side wall of funnel soil sampler and between bottom is provided with
Every uniform hole, aperture Φ 5mm, spacing 30mm, it is ensured that water energy quickly flows out, bottommost single order is connected after closing with rod member, structure
Into complete funnel soil sampler.
During clear soil, carry out as follows：
1st, the broken stone for getting lodged in an in-core is dug
The stone of an in-core is abolished with the pneumatic pick of overlength drilling rod.And incorporation engineering groundwater pressure is larger pre- with pile tube 7
Stay core soil soil pressure or a water pressure floating factor, the inner concrete perfusion basis that the clear soil height of stake core is required in design drawing
Upper corresponding increase 500mm, i.e., clear soil height H=design height+0.5m, it is fixed along with pneumatic pick is in stake operating space 500mm suitable for reading
The pneumatic pick drilling rod of corresponding length processed.
First by design drawing requirement, stake core is identified into mark by the pile tube that stone is blocked, anti-floating is identified respectively
Stake, anti-floating and uplift pile and compressive pile, further according to live practice of construction situation and schedule requirement, arrange two groups of people to dig anti-floating respectively
Stake and the stone of compressive pile stake in-core.According to stake in-core stone number, layering stone is dug into broken, per layer cuts depth and is less than
30mm, drilling rod intersects drop point into quincunx spacing 30mm when cutting so as to which ballast grain sizes are controlled in 30mm～50mm.
2nd, the stone of stake in-core is taken out
Draw a core funnel and draw a core technological process：Stake core water filling → funnel is connected → draws out rubble (stake in-core with air compressor machine
Stone number, stone digs broken by layering, and rubble is taken out in layering) → cleaning pile lining → extraction stake in-core sewage → draw a core tests
Receive.
According to the actual conditions of each pile for prestressed pipe stake in-core, appropriate water is injected in stake in-core so as to stake in-core
Water management is flooding rubble 300mm～500mm, if the stake in-core depth of water exceedes this depth, should be first with sewage pump by stake in-core
Water is evacuated to after this depth, is reused funnel soil sampler and is fetched earth, it is to avoid stake in-core water is too deep, and air pressure cannot be by bottom rubble and water one
Rise " boiling ".
After funnel soil sampler action bars is connected with air compressor machine, air pressure is controlled, slowly stretch into an in-core, treat funnel by stake core
After interior water logging is full, start and toward the agitation of stake core bottom, make bottom rubble float with water " boiling " and fall into funnel, operate continuously
3min or so, funnel soil sampler is extracted, and is completed and is once fetched earth, and is fetched earth according to how many repetitions of rubble in stake.Due to stake core
Interior stone needs layering to cut, therefore rubble takes out and to be also layered taking-up, and then clear soil height control every time press in 300mm or so
The step of " stone cuts → rubble taking-up ", repeats, until it reaches the clear soil depth of stake core.
3rd, stake side wall, pile crown cleaning and sewage are extracted out
Stake core fetches earth and completes, and borehole cleaning depth is endured strict scrutiny, it is necessary to reaches design and fetches earth depth+500mm, to depth
Not enough, the construction for carrying out next process is forbidden.Stake core borehole cleaning depth is met after requirement, with giant to pile tube side wall and stake
Head is cleaned.After first pile crown is cleaned up, then a side wall soil is rinsed, after cleaning up, sewage pump is by the mud in pipe
Extract out, such circulation flushing inwall, be finally reached pile crown, stake core side wall cleaning, without soil, after concreting is effectively ensured,
With stake side wall, pile crown it is bonding.
In addition to above-mentioned enforcement, the present invention can also have other embodiment.All employing equivalents or equivalent transformation are formed
Technical scheme, all fall within the protection domain of application claims.
Claims (10)
1. a kind of pile tube draws a core apparatus, including air compressor machine, the air compressor machine funnel soil sampler and operation connecting rod, and its feature exists
In：The pneumatic tube attended operation connecting rod of the air compressor machine, the operation connecting rod fetches earth through funnel soil sampler and with funnel
The silk tooth joint connection that the bottom of device is arranged.
2. according to claim 1 pile tube draws a core apparatus, it is characterised in that：The air pressure of the operation connecting rod and air compressor machine
Pipe, funnel soil sampler are the connection of silk tooth, and the operation connecting rod two ends are fixed by the rotation of silk tooth.
3. according to claim 2 pile tube draws a core apparatus, it is characterised in that：The operation connecting rod is formed with outer silk for two ends
The PPR pipe of tooth.
4. according to claim 1 pile tube draws a core apparatus, it is characterised in that：Upper end open, the bottom of the funnel soil sampler
Portion closing, containing three-level step, the bore of every grade of step is from top to bottom successively decreased step by step, is connected by silk tooth between every grade of step.
5. according to claim 4 pile tube draws a core apparatus, it is characterised in that：The first order bench port of the funnel soil sampler
Footpath is 200mm, second level step bore is 100mm, third level step bore is 50mm, and each rank is highly 50mm.
6. according to claim 4 pile tube draws a core apparatus, it is characterised in that：The side wall of the funnel soil sampler and bottom set
There is hole uniformly at intervals.
7. a kind of pile tube draws a core method, comprises the following steps：
The first step, the clear soil height of design, dig the broken stone for getting lodged in an in-core, are layered with the pneumatic pick with the drilling rod of stake core dimensional fits
Dig the stone of broken stake in-core；
Second step, take out stake in-core and dig broken stone, first inject water in stake in-core, reuse pile tube and draw a core apparatus and fetch earth；
3rd step, repeat the first step and second step and take out in stake side wall, pile crown cleaning and sewage to the clear native height for reaching design
Go out, pile tube side wall and pile crown are cleaned with giant, after first pile crown is cleaned up, then rinse a side wall soil, clearly
After wash clean, sewage pump by pipe mud extract out, circulation flushing inwall, be finally reached pile crown, stake core side wall cleaning, without mud
Soil.
8. according to claim 7 pile tube draws a core method, it is characterised in that：In the first step, clear soil height H=designs
Highly+0.5m, during layering chisel crushed stone, per layer cuts depth≤30mm, and drilling rod intersects to fall into quincunx spacing 30mm when cutting
Point, ballast grain sizes are controlled in 30mm～50mm.
9. according to claim 7 pile tube draws a core method, it is characterised in that：In the second step, when fetching earth, funnel fetches earth
After device, operation connecting rod are connected with air compressor machine, control air pressure stretches into an in-core in 0.3～0.5MPa, treats funnel soil sampler by stake
In-core water logging is expired, and the water management of stake in-core is flooding rubble 300mm～500mm, starts and toward the agitation of stake core bottom, makes bottom broken
Stone is fallen into funnel with waterborne floating, and operates continuously 3-5min, and funnel soil sampler is extracted, and completes once to fetch earth.
10. according to claim 9 pile tube draws a core method, it is characterised in that：Height control is fetched earth every time in 290-
320mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611254634.5A CN106638603A (en) | 2016-12-30 | 2016-12-30 | Pipe pile core pulling device and pile core pulling method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611254634.5A CN106638603A (en) | 2016-12-30 | 2016-12-30 | Pipe pile core pulling device and pile core pulling method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106638603A true CN106638603A (en) | 2017-05-10 |
Family
ID=58835634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611254634.5A Pending CN106638603A (en) | 2016-12-30 | 2016-12-30 | Pipe pile core pulling device and pile core pulling method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106638603A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578328A (en) * | 2019-10-11 | 2019-12-17 | 东阳阿语机械科技有限公司 | Equipment for removing pile core sand for building |
| CN111139831A (en) * | 2019-11-21 | 2020-05-12 | 中国建筑第四工程局有限公司 | Pile core cleaning method |
| CN112095607A (en) * | 2020-07-30 | 2020-12-18 | 北京建工土木工程有限公司 | Device and method for quickly removing pile core soil of precast tubular pile |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11131470A (en) * | 1997-10-30 | 1999-05-18 | Daido Concrete Co Ltd | Treating method for pile head inner part in precast pile burying method |
| CN204023574U (en) * | 2014-07-09 | 2014-12-17 | 中国十七冶集团有限公司 | Assembly type draws a core mud device |
| CN204185860U (en) * | 2014-11-06 | 2015-03-04 | 中建八局第一建设有限公司 | A kind of prefabricated tubular pile stake core soil is drawn except shovel |
| CN204419095U (en) * | 2015-01-14 | 2015-06-24 | 赵连平 | Slag cleaning device at the bottom of gaslift hole |
| CN204456158U (en) * | 2014-12-25 | 2015-07-08 | 中铁大桥局集团有限公司 | Quick drawing out soil equipment under a kind of deep water conditions |
| CN105821880A (en) * | 2016-03-24 | 2016-08-03 | 江苏建筑职业技术学院 | Device and method for removing slag of cast-in-situ bored pile through flushing and slag fetching |
| CN206385542U (en) * | 2016-12-30 | 2017-08-08 | 中国核工业华兴建设有限公司 | A kind of pile tube draws a core apparatus |
-
2016
- 2016-12-30 CN CN201611254634.5A patent/CN106638603A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11131470A (en) * | 1997-10-30 | 1999-05-18 | Daido Concrete Co Ltd | Treating method for pile head inner part in precast pile burying method |
| CN204023574U (en) * | 2014-07-09 | 2014-12-17 | 中国十七冶集团有限公司 | Assembly type draws a core mud device |
| CN204185860U (en) * | 2014-11-06 | 2015-03-04 | 中建八局第一建设有限公司 | A kind of prefabricated tubular pile stake core soil is drawn except shovel |
| CN204456158U (en) * | 2014-12-25 | 2015-07-08 | 中铁大桥局集团有限公司 | Quick drawing out soil equipment under a kind of deep water conditions |
| CN204419095U (en) * | 2015-01-14 | 2015-06-24 | 赵连平 | Slag cleaning device at the bottom of gaslift hole |
| CN105821880A (en) * | 2016-03-24 | 2016-08-03 | 江苏建筑职业技术学院 | Device and method for removing slag of cast-in-situ bored pile through flushing and slag fetching |
| CN206385542U (en) * | 2016-12-30 | 2017-08-08 | 中国核工业华兴建设有限公司 | A kind of pile tube draws a core apparatus |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578328A (en) * | 2019-10-11 | 2019-12-17 | 东阳阿语机械科技有限公司 | Equipment for removing pile core sand for building |
| CN111139831A (en) * | 2019-11-21 | 2020-05-12 | 中国建筑第四工程局有限公司 | Pile core cleaning method |
| CN111139831B (en) * | 2019-11-21 | 2021-04-27 | 中国建筑第四工程局有限公司 | Pile core cleaning method |
| CN112095607A (en) * | 2020-07-30 | 2020-12-18 | 北京建工土木工程有限公司 | Device and method for quickly removing pile core soil of precast tubular pile |
| CN112095607B (en) * | 2020-07-30 | 2021-11-02 | 北京建工土木工程有限公司 | Device and method for quickly removing pile core soil of precast tubular pile |
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Application publication date: 20170510 |