CN106677169B - It is adapted to the squeezed screw thread pile construction method that spins of severe cold weather - Google Patents
It is adapted to the squeezed screw thread pile construction method that spins of severe cold weather Download PDFInfo
- Publication number
- CN106677169B CN106677169B CN201710034868.7A CN201710034868A CN106677169B CN 106677169 B CN106677169 B CN 106677169B CN 201710034868 A CN201710034868 A CN 201710034868A CN 106677169 B CN106677169 B CN 106677169B
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- Prior art keywords
- concrete
- stake
- well
- casing
- drilling rod
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
Abstract
The squeezed screw thread pile construction method that spins for being adapted to severe cold weather is provided, save the concrete delivery pipe being arranged inside drilling rod, the efferent duct of concrete mixer is directly placed into the pillar being arranged in stake well and is poured concrete, effectively shorten concrete conveyance when outer distance, concrete caused by avoiding because of severe cold weather freezes blocking in delivery pipe leads to be unable to the technical problem of normal construction.
Description
Technical field
The invention belongs to technical field of civil engineering, and in particular to a kind of squeezed Screw Pile of spinning for being adapted to severe cold weather is applied
Engineering method.
Background technique
Squeezed screw thread (screw rod) construction method that spins is the mature stake method of current application, because that it is with following advantage is extensive
Using: first is that because its pile body has shallow thread, therefore friction stress can be changed to shearing stress, to do the bearing capacity of high stake；
Second is that stake soil combination roughness is greater than general pile body, ultimate bearing capacity can achieve 1.5-2 times of general stake；Third is that can reach
To stake end without loosened soil, rotary squeezing bored concrete pile bulk settling, which is less than, takes great soil group type stake, end resistance be effectively played；Fourth is that spiral shell
The presence of tooth makes pile body not lose cohesive strength, and rotary squeezing bored concrete pile constructively takes the shape that pile body has shallow thread
Formula makes stake under vertical uniform load q, does not occur soil body void region between thread and thread, will not therefore cause bearing capacity
Loss shows the stress characteristic of the whole stress of stake soil, compatible deformation, and showing pile body surface, there are shallow threads for improving stake
Bearing capacity, reduce sedimentation important in inhibiting, the result of finite element stimulation also demonstrates this important function.The construction
Although method have many advantages, such as it is above-mentioned, there is also its limitation, when requirement of engineering is especially severe cold weather construction in winter,
It can not be just normally carried out using the construction method.It is well known that in order to continuously to being poured concrete in stake well, usually inside drilling rod
Equipped with concrete delivery pipe, which is connected to concrete mixer efferent duct, and outlet end is placed in drilling rod
Inside is close to the position of rod bit.When stake well gets into predetermined depth, drilling rod bores and is lifted certain altitude under stopping, starting at this time
Concrete mixer, concrete is entered in the concrete delivery pipe inside drilling rod by concrete mixer efferent duct, in concrete
Under Gravitative Loads, concrete reaches drilling rod and enters in a well close to bit head position and along drill bit periphery, when concrete is in stake well
Height when reaching setting height, promote drilling rod again and repeat before the step of, gradually stake well is filled up with concrete；One
After the completion of stake well construction, need drilling-machine shifter to continue to next station to drill out a well, then transportable concrete pump truck arrives again
Right position, which is set, supplies concrete to stake well.In this work progress, there are the technical problems that two o'clock can not overcome at present: first is that drilling rod
Internal concrete delivery pipe outlet end apart from rod bit apart from close, when drill bit continuous work and ground level underlying geological shape
When state is poor, drill bit is easy to fever and generates heat, the inevasible concrete delivery pipe being transmitted to inside drilling rod of the heat
At outlet end, the solidification of concrete heat causes to block at concrete delivery pipe outlet end, causes construction and security risk；Second is that
According to the depth of stake well, the length of usual drilling rod can be greater than the depth of stake well, and when drilling rod is lifted to the limit, concrete mixer is defeated
Outlet pipe is in order to achieve the purpose that be connected to drilling rod inner concrete delivery pipe input end, and the length of concrete mixer efferent duct is very
Long, when upper station casting concrete has residual and meets severe cold weather inside it, remaining concrete is easy to pumping
Freeze in vehicle efferent duct and extremely difficult removing, influences the normal work of concrete mixer when next station.Drawbacks described above constrains
The using area of squeezed screw thread (screw rod) method of spinning and time in season, it is therefore necessary to propose to improve.
Summary of the invention
Present invention solves the technical problem that: a kind of squeezed screw thread pile construction method that spins being adapted to severe cold weather is provided, is saved
The concrete delivery pipe being arranged inside drilling rod is removed, the efferent duct of concrete mixer is directly placed into the pillar being arranged in stake well
Be poured concrete, effectively shorten concrete conveyance when outer distance, concrete is in delivery pipe caused by avoiding because of severe cold weather
In freeze blocking and lead to be unable to the technical problem of normal construction.
The technical solution adopted by the present invention: it is adapted to the novel construction method of the squeezed Screw Pile of whirl spraying of severe cold weather, under including
State step:
1) suitable drilling rod is selected according to stake well, and need not setting concrete delivery pipe inside drilling rod；
2) well is formed using the routine techniques for squeezed Screw Pile method of spinning, then directly promotes drilling rod Dao stake well outside
Portion；
3) mantle rock of stake bottom is tamped using conventional tamping unit；
4) be arranged in stake well outer diameter be less than the casing of stake well internal diameter and make casing lower end and stake bottom keep away from
From；
5) concrete mixer is placed in outside a well suitable position and outputs it pipe and be directly placed into casing upper port, started
Concrete mixer, concrete are directly entered in casing；
6) concrete entered in casing is fallen using self weight, and enters a bottom from casing lower port, with coagulation
The gap of the continuous injection of soil, casing lower end and stake bottom is filled and between casing excircle and stake well inner wall
Filling is turned in gap, solves the segregation phenomenon that concrete is generated because of stake well depth；
7) after concrete fills well, casing is promoted to outside a well, then be inserted into reinforcing bar in the concrete into stake well
Cage, to concrete setting.
Above-mentioned steps 4) in, the casing lower end is the one third of stake well depth at a distance from stake bottom, (specifically may be used
With reference to the data in terms of concrete underwater grouting).
Above-mentioned steps 5) in, the hopper with taper inclination angle, the output of the concrete mixer are set at casing upper port
Pipe is placed in hopper.
Above-mentioned steps 4) in, the outer diameter of the casing and the internal diameter ratio of stake well are 1:2-5.
Above-mentioned steps 3) in, the tamping unit is that hoist engine driving compacting long tube tamps the mantle rock of stake bottom.
The present invention compared with prior art the advantages of:
1, the concrete delivery pipe being arranged inside drilling rod is saved, the efferent duct of concrete mixer is directly placed into and is arranged in stake
Concrete is poured in pillar in well, effectively shorten concrete conveyance when outer distance, avoid mixing caused by because of severe cold weather
Solidifying soil freezes blocking in delivery pipe leads to the technical problem for being unable to normal construction；
2, the concrete delivery pipe being arranged inside drilling rod is saved, it can be to avoid in the prior art because Driller Exothermic passes heat
It is delivered to blocking caused by drilling rod inner concrete delivery pipe outlet end；
3, casing is set in stake well, is fallen into the concrete in casing using self weight, and enter from casing lower port
Stake bottom, with the continuous injection of concrete, the gap of casing lower end and stake bottom is filled and to casing excircle
Filling is turned in gap between stake well inner wall, solves the segregation phenomenon that concrete is generated because of stake well depth；
4, the concrete delivery pipe being arranged inside drilling rod is saved, applying for squeezed screw thread (screw rod) construction method that spins just is expanded
Work area domain and time in season, effectively save enterprise construction cost greatly improve working efficiency；
5, hopper with angle is set at casing upper port, effectively prevent the surface dust of a well head is secondary to enter in stake well
Portion.
Specific embodiment
A kind of embodiment of the invention is described below.
It is adapted to the squeezed screw thread pile construction method that spins of severe cold weather, includes following step:
1) suitable drilling rod is selected according to stake well, and need not setting concrete delivery pipe inside drilling rod；
2) well is formed using the routine techniques for squeezed Screw Pile method of spinning, then will bores -5 bars and is directly promoted to stake well
It is external；
3) mantle rock of stake bottom is tamped using conventional tamping unit；The tamping unit is that hoist engine driving is rammed
True length pipe tamps the mantle rock of stake bottom, is not limited to such mode, is as long as the surface dust of stake bottom can be tamped
It can；
4) be arranged in stake well outer diameter be less than the casing of stake well internal diameter and make casing lower end and stake bottom keep away from
From；Specifically, the casing lower end (specifically refers to concrete water for the one third of stake well depth at a distance from stake bottom
Data in terms of lower perfusion)；The outer diameter of the casing and the internal diameter ratio of stake well are 1:2-5 (1:2；1-3；1-5), between the two
Gap needs to guarantee that concrete smoothly turns over filling between casing and stake well；
5) concrete mixer is placed in outside a well suitable position and outputs it pipe and be directly placed into casing upper port, started
Concrete mixer, concrete are directly entered in casing；Hopper with taper (45 degree) inclination angle is set at casing upper port, it is described
The efferent duct of concrete mixer is placed in hopper, effectively prevent the surface dust of a well head is secondary to enter inside stake well；
6) concrete entered in casing is fallen using self weight, and enters a bottom from casing lower port, with coagulation
The gap of the continuous injection of soil, casing lower end and stake bottom is filled and between casing excircle and stake well inner wall
Filling is turned in gap, solves the segregation phenomenon that concrete is generated because of stake well depth；
7) after concrete fills well, casing is promoted to outside a well, then be inserted into reinforcing bar in the concrete into stake well
Cage, to concrete setting.
Squeezed screw thread (screw rod) method of spinning is a kind of mature well known pile making method, and concrete operations process is no longer superfluous herein
It states；Severe cold weather described in above-mentioned technical proposal, typically referring to subzero can lead to the weather temperature that concrete freezes.
Above-described embodiment, only presently preferred embodiments of the present invention, is not intended to limit the invention practical range, therefore all with this
The equivalence changes that content described in invention claim is done should all be included within scope of the invention as claimed.
Claims (2)
1. being adapted to the squeezed screw thread pile construction method that spins of severe cold weather, it is characterised in that include following step:
1) suitable drilling rod is selected according to stake well, and need not setting concrete delivery pipe inside drilling rod；
2) well is formed using the routine techniques for squeezed Screw Pile method of spinning, then directly promotes drilling rod to outside stake well；
3) mantle rock of stake bottom is tamped using conventional tamping unit；
4) outer diameter is arranged in stake well to be less than the casing of stake well internal diameter and casing lower end is made to keep at a distance with stake bottom；
5) concrete mixer is placed in outside a well suitable position and outputs it pipe and be directly placed into casing upper port, start coagulation
Native pump truck, concrete are directly entered in casing；
6) concrete entered in casing is fallen using self weight, and enters a bottom from casing lower port, with concrete
The gap of constantly injection, casing lower end and stake bottom is filled and to the gap between casing excircle and stake well inner wall
Filling is turned over, the segregation phenomenon that concrete is generated because of stake well depth is solved；
7) after concrete fills well, casing is promoted to outside a well, then be inserted into steel reinforcement cage in the concrete into stake well, to
Concrete setting；
Above-mentioned steps 4) in, the casing lower end is the one third of stake well depth at a distance from stake bottom；The casing
The internal diameter of outer diameter and stake well ratio is 1:2-5；
Above-mentioned steps 5) in, the hopper with taper inclination angle is set at casing upper port, and the efferent duct of the concrete mixer is set
In in hopper.
2. the squeezed screw thread pile construction method that spins according to claim 1 for being adapted to severe cold weather, it is characterised in that: above-mentioned
In step 3), the tamping unit is that hoist engine driving compacting long tube tamps the mantle rock of stake bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710034868.7A CN106677169B (en) | 2017-01-17 | 2017-01-17 | It is adapted to the squeezed screw thread pile construction method that spins of severe cold weather |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710034868.7A CN106677169B (en) | 2017-01-17 | 2017-01-17 | It is adapted to the squeezed screw thread pile construction method that spins of severe cold weather |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106677169A CN106677169A (en) | 2017-05-17 |
| CN106677169B true CN106677169B (en) | 2019-05-31 |
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ID=58859286
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710034868.7A Active CN106677169B (en) | 2017-01-17 | 2017-01-17 | It is adapted to the squeezed screw thread pile construction method that spins of severe cold weather |
Country Status (1)
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06136745A (en) * | 1992-04-28 | 1994-05-17 | J D F:Kk | Construction method for hollow widened bottom cast-in-place concrete pile |
| CN100402759C (en) * | 2006-04-26 | 2008-07-16 | 万军 | Screw-thread bored concrete pile piling method |
| CN101250880B (en) * | 2007-12-19 | 2010-12-08 | 中铁大桥局集团第一工程有限公司 | Method for embedding and fixing steel tube concrete pile and steel tube pile anchor |
| CN102425160A (en) * | 2011-08-31 | 2012-04-25 | 中国建筑第二工程局有限公司 | Method for constructing engineering pile by combining rotary drilling rig with manual pile base chambering |
| CN104631442B (en) * | 2014-12-24 | 2016-11-02 | 福建工程学院 | Full-sleeve fetches earth and vibrates squeezed cast-in-place pile construction method |
| CN104762957B (en) * | 2015-04-22 | 2016-05-18 | 中冶成都勘察研究总院有限公司 | A kind of spiral pore-forming rams the construction method that expands CFG stake |
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Effective date of registration: 20220819 Address after: Room 1803, Building F, Changhe International, Fengcheng Eighth Road, Economic and Technological Development Zone, Xi'an City, Shaanxi Province 710018 Patentee after: Shaanxi Yuanji Geotechnical Development Co.,Ltd. Address before: Environmental Protection New Material Industrial Park, Qianyang County, Baoji City, Shaanxi Province, 721100 Patentee before: SHAANXI LONGJI MACHINERY EQUIPMENT CO.,LTD. |
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