CN106930274A - The a full set of cylinder rotatory boring castinplace pile construction method that a kind of reinforcing bar cage location is fixed - Google Patents

The a full set of cylinder rotatory boring castinplace pile construction method that a kind of reinforcing bar cage location is fixed Download PDF

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Publication number
CN106930274A
CN106930274A CN201710193115.0A CN201710193115A CN106930274A CN 106930274 A CN106930274 A CN 106930274A CN 201710193115 A CN201710193115 A CN 201710193115A CN 106930274 A CN106930274 A CN 106930274A
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steel
drill bit
full
flap valve
reinforcing bar
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CN201710193115.0A
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CN106930274B (en
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王浩
刘发明
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Southeast University
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Southeast University
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same

Abstract

The invention discloses a full set of cylinder rotatory boring castinplace pile construction method that a kind of reinforcing bar cage location is fixed, drilled to designed elevation in position to be onstructed using the rig with flap valve drill bit, then flap valve drill bit is opened, the foot of hole is delivered to by the steel bushing central cavity steel reinforcement cage vertically, finally by conduit through the opening of the steel bushing and flap valve drill bit to the foot of hole concrete perfusion, steel bushing is lifted up simultaneously, until the flap valve drill bit is extracted from drilling.The a full set of cylinder rotatory boring castinplace pile construction method fixed by the reinforcing bar cage location of above-mentioned optimization design, change drilling and forming hole mode on the basis of full circle swinging drill construction technique, need not stop to bore and be fetched earth from steel bushing, greatly speed up construction speed, and reduce pollution of the mud to construction site surrounding enviroment, in addition pass through steel bushing in drill bit lifting process to foot of hole concrete perfusion, significantly control pile quality, improve the efficiency of construction of bored concrete pile.

Description

The a full set of cylinder rotatory boring castinplace pile construction method that a kind of reinforcing bar cage location is fixed
Technical field
Returned the present invention relates to road and bridge, technical field of building construction, more particularly to a full set of cylinder that a kind of reinforcing bar cage location is fixed Turn bored pile construction method.
Background technology
With China's modernization construction develop rapidly and Development of China's Urbanization quickening, elevated bridge and skyscraper Construction has turned into the important component in the big construction of China, great development.A large amount of uses of bored concrete pile can ensure to be building work Cheng Jianshe provides solid foundation, and the correlation technique on bored concrete pile is also improved and tends to ripe in succession.But in practice of construction In there is also much with society, the discordant factor of environment, cause construction costs higher, construction operation intensity is big, the time is long Influenceed etc. series of negative.Traditional filling pile construction engineering method is primarily present two problems of aspect:One is due to bottom hole sediment Thicker, rising of steel cage and position are not fixed and make the bearing capacity of pile relatively low, do not reach design strength requirement;The opposing party's face Easily there is broken pile, bottleneck stake, hang some quality problems piles such as pin stake.These long-span bridge girder constructions and super-high buildings are made to pile foundation With more sensitive, pile base construction method is for the aspect important such as pile quality, construction speed, engineering cost.
Full circle swinging cast-in-situ bored pile be in recent years China engineering construction field frequently with a kind of pile foundation construction method, The improvement of its construction method is one of focus of current structure foundation engineering research.In filling pile construction control process, change Drilling mode, various pile modes are combined, simplify the measures such as construction technology using more.Wherein, pile mode measure (bag is changed Include hammering pile, vibration pile and blasting pile-forming etc.) it is currently to improve one of mostly important means of filling pile construction engineering method, can Effectively to omit the operations such as a large amount of earthwork excavation and fillings, support assembly and disassembly and the laying of precipitation facility, mechanized construction level is improved, so that real Pile quality is now controlled, improved construction operation environment, reduce settlement of foundation and is obtained the purposes such as good economic benefit.
Existing engineering practice shows, using mud off pore-creating filling pile in work progress, there is casing and brill Machine separate operaton, prepare various suitable mud and be used for retaining wall, need constantly to stop to bore and grab soil, reinforcing bar cage location and do not fix rushing The harmful effect factor such as protective layer thickness deficiency is caused, low stake holes deflection, drilling efficiency, complicated construction technique, construction is produced Quality problems and irrational constructions such as cost increase.Especially when more long unfavorable by construction interference and pile body When factor influences, the shift phenomenon of reinforcing bar cage location happens occasionally.Generate such as rising of steel cage, steel reinforcement cage perpendicularity not Foot, the steel reinforcement cage length of embedment in concrete are not enough, steel reinforcement cage shifts to an earlier date stress generation moderate finite deformation etc. construction quality hidden danger and asks Topic, causes to occur to hang some armored concrete problems such as pin stake, reinforcing steel bars exposed, reduces the design strength of pile body and durable Property.
The content of the invention
To solve technical problem present in background technology, the present invention proposes that a full set of cylinder that a kind of reinforcing bar cage location is fixed is returned Turn bored pile construction method.
The a full set of cylinder rotatory boring castinplace pile construction method that a kind of reinforcing bar cage location proposed by the present invention is fixed, including it is following Method:
S1, drilled to designed elevation in position to be onstructed using rig, the rig include the steel bushing being vertically arranged and Installed in the flap valve drill bit of steel bushing bottom;
S2, the flap valve of the flap valve drill bit in S1 is opened, by opening for the cavity in the middle part of the steel bushing and flap valve drill bit Mouth is delivered to the foot of hole by steel reinforcement cage vertically;
S3, by conduit through the opening of the steel bushing and flap valve drill bit to the foot of hole concrete perfusion, together When steel bushing is lifted up, until the flap valve drill bit from drilling in extract.
Preferably, in S1, the flap valve drill bit is coaxially arranged with the steel bushing.
Preferably, in S2, the steel reinforcement cage includes many stress cage bars, steel diaphragm, spiral hoops, and many stress cage bars are put down Row in axial arranged and around circumference distribution, around many stress cage bars arrange and fixed with stress cage bar, steel by spiral hoop Dividing plate has loop configuration, and steel diaphragm is provided with multiple through holes passed through for stress cage bar.
Preferably, the steel reinforcement cage include along stress cage bar length direction arrange multiple steel diaphragms, two neighboring steel every The distance between plate is not more than 4 meters;Preferably, the internal diameter of the steel diaphragm is D1 and external diameter is D2, D1/D2 >=70%.
Preferably, in S2, before steel reinforcement cage to be put into drilling, the residual body refuse to foot of hole is cleared up.
Preferably, in S2, foot of hole is cleared up by introducing water and discharging mud to foot of hole.
Preferably, the conduit pipe of vertical direction extension is provided with the wall of steel bushing side, is provided with flap valve drill bit and is led with described The apopore of aquaporin connection.
Preferably, in S2, the relative density A to the mud of foot of hole discharge is detected, when A≤1.1, Stop cleaning.
Preferably, flap valve drill bit is provided with wolf's fang projection away from steel bushing one end.
Preferably, in S3, during steel bushing is lifted, steel bushing is driven to reversely rotate.
In the present invention, a full set of cylinder rotatory boring castinplace pile construction method that the reinforcing bar cage location for being proposed is fixed, using tool The rig for having flap valve drill bit drills to designed elevation in position to be onstructed, then opens the flap valve of flap valve drill bit, by described Steel reinforcement cage is delivered to the foot of hole vertically for the opening of cavity and flap valve drill bit in the middle part of steel bushing, is passed through finally by conduit The opening of the steel bushing and flap valve drill bit is to the foot of hole concrete perfusion, while steel bushing is lifted up, until The flap valve drill bit is extracted from drilling.The a full set of cylinder Rotary drilling fixed by the reinforcing bar cage location of above-mentioned optimization design is irrigated Pile construction method, changes drilling and forming hole mode on the basis of existing full circle swinging drill construction technique, without stopping boring from steel bushing In fetch earth, greatly speed up construction speed, and reduce pollution of the mud to construction site surrounding enviroment, lifted in drill bit in addition By steel bushing to foot of hole concrete perfusion in journey, pile quality is significantly controlled, improve the efficiency of construction of bored concrete pile.
Brief description of the drawings
Fig. 1 is the stream of a full set of cylinder rotatory boring castinplace pile construction method that a kind of reinforcing bar cage location proposed by the present invention is fixed Cheng Tu.
Fig. 2 is the brill of a full set of cylinder rotatory boring castinplace pile construction method that a kind of reinforcing bar cage location proposed by the present invention is fixed Head pierces the structural representation in drilling.
Fig. 3 is the steel of a full set of cylinder rotatory boring castinplace pile construction method that a kind of reinforcing bar cage location proposed by the present invention is fixed The structural representation of the steel diaphragm of muscle cage.
Specific embodiment
As shown in Figures 1 to 3, Fig. 1 is a full set of cylinder Rotary drilling perfusion that a kind of reinforcing bar cage location proposed by the present invention is fixed The flow chart of pile construction method, Fig. 2 is a full set of cylinder rotatory boring castinplace pile that a kind of reinforcing bar cage location proposed by the present invention is fixed The drill bit of construction method pierces the structural representation in drilling, and Fig. 3 is a kind of the complete of reinforcing bar cage location fixation proposed by the present invention The structural representation of the steel diaphragm of the steel reinforcement cage of sleeve rotatory boring castinplace pile construction method.
Referring to figs. 1 to 3, a full set of cylinder rotatory boring castinplace pile construction party that a kind of reinforcing bar cage location proposed by the present invention is fixed Method, comprises the following steps:
S1, drilled to designed elevation in position to be onstructed using rig, the rig includes the He of steel bushing 1 being vertically arranged Installed in the flap valve drill bit 2 of the bottom of steel bushing 1;
S2, the flap valve of the flap valve drill bit 2 in S1 is opened, by the cavity at the middle part of the steel bushing 1 and flap valve drill bit 2 Opening is delivered to the foot of hole by steel reinforcement cage vertically;
S3, by conduit through the opening of the steel bushing 1 and flap valve drill bit 2 to the foot of hole concrete perfusion, Steel bushing 1 is lifted up simultaneously, until the flap valve drill bit 2 is extracted from drilling.
In the present embodiment, a full set of cylinder rotatory boring castinplace pile construction method that the reinforcing bar cage location for being proposed is fixed, adopts Drilled to designed elevation in position to be onstructed with the rig with flap valve drill bit 2, then open the flap valve of flap valve drill bit 2, led to Steel reinforcement cage is delivered to the foot of hole vertically for the opening of the cavity and flap valve drill bit 2 of crossing the middle part of the steel bushing 1, finally by Conduit through the opening of the steel bushing 1 and flap valve drill bit 2 to the foot of hole concrete perfusion, while by steel bushing 1 to Upper lifting, until the flap valve drill bit 2 is extracted from drilling.The a full set of cylinder fixed by the reinforcing bar cage location of above-mentioned optimization design Rotatory boring castinplace pile construction method, changes drilling and forming hole mode on the basis of existing full circle swinging drill construction technique, without Stop boring and fetched earth from steel bushing 1, greatly speed up construction speed, and reduce pollution of the mud to construction site surrounding enviroment, this By steel bushing 1 to foot of hole concrete perfusion in external drill bit lifting process, pile quality is significantly controlled, improve bored concrete pile Efficiency of construction.
The specific work process of a full set of cylinder rotatory boring castinplace pile construction method that the reinforcing bar cage location of the present embodiment is fixed In, previously according to design drawing requirement, position the position of cast-in-situ bored pile;In S1, sling steel bushing with crawler crane at stake position Cylinder 1, and the flap valve drill bit 2 of the lower end of steel bushing 1 is closed, and slowly puts down steel bushing 1 and steel flap valve drill bit 2 behind align piles position again Assembly, makes the assembly vertical with soil body surface, then drives steel bushing 1 to drive flap valve drill bit 2 to rotate, make assembly by Gradually sink, in the assembly sinking watching, it is ensured that hole position is accurate and gradient;In S2, treat that the assembly sinks down into During designed elevation, steel bushing 1 is rotated backward, allow the assembly to be promoted to away from bottom hole preset height 400mm, open flap valve drill bit 2 flap valve, steel reinforcement cage is hung using crawler belt;In S3, conduit is installed, and irrigated to foot of hole by steel bushing 1 from conduit Concrete, in filling process, while and be lifted up steel bushing 1, until casting complete.
In S1, in the specific embodiment of rig, the flap valve drill bit 2 is coaxially arranged with the steel bushing 1, it is ensured that Boring work stabilization.
In the specific design mode of flap valve drill bit 2, the flap valve of flap valve drill bit 2 is mutually twisted in boring procedure, and flap valve is bored First 2 are provided with wolf's fang projection away from the one end of steel bushing 1, can adapt to drilling through for competent bed, greatly improve its boring work efficiency.
In S2, in the specific design of steel reinforcement cage, the steel reinforcement cage includes many stress cage bars 3, steel diaphragms 4, spiral Hoop 5, many stress cage bars 3 parallel to it is axial arranged and around circumference distribution, spiral hoop 5 is around many cloth of stress cage bar 3 Put and fixed with stress cage bar 3, steel diaphragm 4 has loop configuration, steel diaphragm 4 is provided with multiple for leading to that stress cage bar 3 is passed through Hole, by setting steel diaphragm 4, during concrete perfusion, it is ensured that the position stabilization of stress cage bar 3 does not offset, and meets stress While the perpendicularity of cage bar 3, it is ensured that the protective layer thickness outside stress cage bar 3;Further, the steel reinforcement cage includes edge The distance between multiple steel diaphragms 4 of the length direction of stress cage bar 3 arrangement, two neighboring steel diaphragm 4 are not more than 4 meters, such shape Into steel reinforcement cage can both meet the requirement of cover to reinforcement, it is also possible to increase the globality of pile body, be greatly enhanced pile body Bearing capacity and anti seismic efficiency.
In the specific design of steel diaphragm 4, the internal diameter of the steel diaphragm 4 is D2 for D1 and external diameter, D1/D2 >=70%, The concreting hole not less than the diameter of 70% steel diaphragm 4 is left in the center of steel diaphragm 4, has so both alleviated steel diaphragm 4 Quality, has also consolidated the position of reinforcing bar, it is ensured that the construction quality of pile body.
In other specific embodiments, before steel reinforcement cage to be put into drilling, the residual body refuse to foot of hole is carried out Cleaning, it is ensured that later stage pouring quality;In a specific embodiment, in S2, water and mud is discharged by being introduced to foot of hole Foot of hole is cleared up, specifically, the conduit pipe of vertical direction extension is provided with the side wall of steel bushing 1, in flap valve drill bit 2 The apopore connected with the conduit pipe is provided with, bottom hole is cleared up using jetting device, in order to ensure cleaning effect, In scale removal process, the relative density A to the mud of foot of hole discharge is detected, when A≤1.1, that is, thinks borehole cleaning It is qualified, stop cleaning.
In S3, during steel bushing 1 is lifted, steel bushing 1 is driven to reversely rotate;Specifically, in filling process, On the one hand rotate backward and extract steel bushing 1 upwards, on the other hand by conduit pipe and apopore jetting, using the anti-of water punching Active force accelerates the lifting speed of steel bushing 1, while being also beneficial to further borehole cleaning, it is ensured that the environment of underwater concreting Quality.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto, Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its Inventive concept is subject to equivalent or change, should all be included within the scope of the present invention.

Claims (10)

1. a full set of cylinder rotatory boring castinplace pile construction method that a kind of reinforcing bar cage location is fixed, it is characterised in that including following side Method:
S1, drilled to designed elevation in position to be onstructed using rig, the rig includes the steel bushing (1) being vertically arranged and peace Mounted in the flap valve drill bit (2) of steel bushing (1) bottom;
S2, the flap valve opening by the flap valve drill bit (2) in S1, by the cavity in the middle part of the steel bushing (1) and flap valve drill bit (2) Opening steel reinforcement cage is delivered to the foot of hole vertically;
S3, by conduit through the opening of the steel bushing (1) and flap valve drill bit (2) to the foot of hole concrete perfusion, Steel bushing (1) is lifted up simultaneously, until the flap valve drill bit (2) is extracted from drilling.
2. a full set of cylinder rotatory boring castinplace pile construction method that reinforcing bar cage location according to claim 1 is fixed, its feature It is that in S1, the flap valve drill bit (2) is coaxially arranged with the steel bushing (1).
3. a full set of cylinder rotatory boring castinplace pile construction method that reinforcing bar cage location according to claim 1 is fixed, its feature It is that in S2, the steel reinforcement cage includes many stress cage bars (3), steel diaphragm (4), spiral hoops (5), many stress cage bars (3) Parallel to it is axial arranged and around circumference distribution, spiral hoop (5) arranged around many stress cage bars (3) and with stress cage bar (3) fixed, with loop configuration, steel diaphragm (4) is provided with multiple through holes passed through for stress cage bar (3) to steel diaphragm (4).
4. a full set of cylinder rotatory boring castinplace pile construction method that reinforcing bar cage location according to claim 3 is fixed, its feature It is that the steel reinforcement cage includes the multiple steel diaphragms (4) arranged along stress cage bar (3) length direction, two neighboring steel diaphragm (4) The distance between be not more than 4 meters;Preferably, the internal diameter of the steel diaphragm (4) is D1 and external diameter is D2, D1/D2 >=70%.
5. a full set of cylinder rotatory boring castinplace pile construction method that reinforcing bar cage location according to claim 1 is fixed, its feature It is that in S2, before steel reinforcement cage to be put into drilling, the residual body refuse to foot of hole is cleared up.
6. a full set of cylinder rotatory boring castinplace pile construction method that reinforcing bar cage location according to claim 5 is fixed, its feature It is in S2, foot of hole to be cleared up by introducing water and discharging mud to foot of hole.
7. a full set of cylinder rotatory boring castinplace pile construction method that reinforcing bar cage location according to claim 6 is fixed, its feature It is to be provided with logical with the water guide in the conduit pipe that vertical direction extension is provided with the wall of steel bushing (1) side, flap valve drill bit (2) The apopore of road connection.
8. a full set of cylinder rotatory boring castinplace pile construction method that reinforcing bar cage location according to claim 6 is fixed, its feature It is that in S2, the relative density A to the mud of foot of hole discharge is detected, when A≤1.1, stops cleaning.
9. a full set of cylinder rotatory boring castinplace pile construction method that reinforcing bar cage location according to claim 1 is fixed, its feature It is that it is raised that flap valve drill bit (2) is provided with wolf's fang away from steel bushing (1) one end.
10. a full set of cylinder rotatory boring castinplace pile construction method that reinforcing bar cage location according to claim 1 is fixed, its feature It is in S3, during steel bushing (1) is lifted, to drive steel bushing (1) to reversely rotate.
CN201710193115.0A 2017-03-28 2017-03-28 A kind of a full set of cylinder rotatory boring castinplace pile construction method that reinforcing bar cage location is fixed Active CN106930274B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108316286A (en) * 2018-03-28 2018-07-24 中交公局第三工程有限公司 Based on the construction process for bored pile under complicated geological hydrologic condition
CN112281823A (en) * 2020-10-12 2021-01-29 杜文中 Laminated pouring type concrete pile and pouring process thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201649074U (en) * 2010-01-14 2010-11-24 孔超 Pile-forming device with valve pile shoe rectangular immersed tube concrete cast-in-place pile
CN203174597U (en) * 2013-01-15 2013-09-04 五冶集团上海有限公司 Flap type pile point of tube-sinking cast-in-situ pile
CN105780763A (en) * 2015-12-08 2016-07-20 河南锦源基础工程有限公司 Construction method of medium-hole vibrating casing wall protection type long spiral cast-in-situ bored pile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201649074U (en) * 2010-01-14 2010-11-24 孔超 Pile-forming device with valve pile shoe rectangular immersed tube concrete cast-in-place pile
CN203174597U (en) * 2013-01-15 2013-09-04 五冶集团上海有限公司 Flap type pile point of tube-sinking cast-in-situ pile
CN105780763A (en) * 2015-12-08 2016-07-20 河南锦源基础工程有限公司 Construction method of medium-hole vibrating casing wall protection type long spiral cast-in-situ bored pile

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108316286A (en) * 2018-03-28 2018-07-24 中交公局第三工程有限公司 Based on the construction process for bored pile under complicated geological hydrologic condition
CN108316286B (en) * 2018-03-28 2020-04-21 中交一公局集团有限公司 Cast-in-situ bored pile construction process based on complex geological hydrological condition
CN112281823A (en) * 2020-10-12 2021-01-29 杜文中 Laminated pouring type concrete pile and pouring process thereof
CN112281823B (en) * 2020-10-12 2022-02-18 赣杰建设集团有限责任公司 Laminated pouring type concrete pile and pouring process thereof

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