CN105064334A - Construction method for cast-in-situ bored pile - Google Patents

Construction method for cast-in-situ bored pile Download PDF

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Publication number
CN105064334A
CN105064334A CN201510472010.XA CN201510472010A CN105064334A CN 105064334 A CN105064334 A CN 105064334A CN 201510472010 A CN201510472010 A CN 201510472010A CN 105064334 A CN105064334 A CN 105064334A
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CN
China
Prior art keywords
push
bench
construction
steel pipe
head
Prior art date
Application number
CN201510472010.XA
Other languages
Chinese (zh)
Inventor
朱雁飞
王祺
庄欠伟
吕建中
吴兆宇
彭世宝
杨正
陆晓华
李钦
陈哲
张弛
Original Assignee
上海盾构设计试验研究中心有限公司
上海隧道工程有限公司
Priority date (The priority date 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 date listed.)
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Application filed by 上海盾构设计试验研究中心有限公司, 上海隧道工程有限公司 filed Critical 上海盾构设计试验研究中心有限公司
Priority to CN201510472010.XA priority Critical patent/CN105064334A/en
Publication of CN105064334A publication Critical patent/CN105064334A/en

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Abstract

A construction method for a cast-in-situ bored pile includes the following steps that a, the pile is positioned, a push bench is assembled in the perpendicular direction, a machine head of the push bench is connected with steel pipe joints, the machine head and the steel pipe joints are jointly fixed to the back of the push bench and the lower portion of a jack, and therefore the axes of the steel pipe joints and the axis of the machine head of the push bench can coincide with each other; b, the push bench is started to perpendicularly drill the machine head and the steel pipe joints downwards, the corresponding new steel pipe joint is connected and arranged between the jack and the machine head each time the push bench conducts pushing downwards by a distance, the machine head continues to conduct drilling after installation is completed, and downward pushing is conducted in a circulation manner in this way; c, after drilling is conducted to the preset hole depth, the machine head of the push bench is pulled back and pulled out of a pile hole step by step, and meanwhile concrete slurry is poured into the pile hole step by step through an inner pipeline in the push bench; and d, the machine head completely retreats from the ground, grouting is completed at the same time, and the cast-in-place pile is solidified and formed after the concrete curing time is up. By means of the construction method, construction steps are simplified, efficiency is improved, cost is saved, the protection wall strength is improved, the safety coefficient is increased, the full-automatic and mechanical construction process is achieved, and the construction method is suitable for stratums of various structures.

Description

A kind of construction method of bored pile

Technical field

The present invention relates to a kind of construction method of castinplace pile, be specifically related to a kind of construction method of bored pile, belong to building with regard to technical field.

Background technology

In building foundation engineering, along with the development of the piling machinery of pore-forming operation, boring is applied to the foundation basic construction engineerings such as highrise building field, highway bridge and large-scale structure gradually.In order to adapt to the various construction requirements of building field widely, various ways is needed to carry out pile foundation boring perfusion.The fields such as present heavy construction and large bridge, more and more higher to the requirement of pile foundation boring, bore diameter is more and more accurate, and hole wall verticality requires more and more higher, also more and more higher to the requirement situation of construction field geology, thus also more and more higher to the requirement of bored pile construction method.

Summary of the invention

The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of construction method of carrying out bored pile at vertical direction is provided, it simplifies construction sequence in the process of boring, form the bored pile that hole shape is regular, reach and save hole wall reinforcement material, reduce the effect of engineering time and saving construction cost.

To achieve these goals, the technical solution used in the present invention is as follows:

A construction method for bored pile, comprises the following steps:

A) guide pile position, vertically assembles push-bench, is fixed to the rear by the below with jack of described push-bench, makes the dead in line of the head of the axis of described steel pipe joint and described push-bench together with the head of this push-bench and steel pipe joint being connected also;

B) start described push-bench described head and described steel pipe joint to be crept into vertically downward, every propelling downwards one segment distance, between described jack and head, be hinged with new steel pipe joint, after installation, described head continues to creep into, and so circulation advances downwards;

C) boring is to after predetermined hole depth, is progressively retracted by the head of described push-bench and extracts stake holes, meanwhile by the internal duct of described push-bench progressively to concrete perfusion slurries in stake holes;

D) described head exits ground completely, has poured into simultaneously, after the concrete curing time terminates, and castinplace pile solidification forming.

Preferably, described push-bench adopts push pipe mode to carry out stake holes to creep into.

Preferably, described step b) in, the unearthed mode of described push-bench adopts screw machine to be unearthed or mud and water balance control technology is unearthed.

Compared with prior art, the present invention adopts push-bench to carry out the construction of bored pile, the requirement of all kinds of structure stratum such as Soft Soil Layer, sand stone layer, rubble boulder bed, lithosphere and compound stratum to boring can be adapted to, obvious to the supporting effect of hole wall, the protection of borehole wall need not be carried out in addition or reinforce action, save hole wall reinforcement cost, to the ground such as sedimentation or protuberance because the distortion that pressure produces has great control; Meanwhile, low to the requirement of construction plant, efficiency of construction is high, is using manpower and material resources sparingly and while time cost, is significantly improve safety factor.

Accompanying drawing explanation

Fig. 1 is the Initial condition of push-bench in the present invention.

Fig. 2 is that in the present invention, push-bench is holed the state put in place completely.

Fig. 3 is the state that in the present invention, push-bench carries out filling concrete while exiting.

Fig. 4 be in the present invention castinplace pile complete after state.

Detailed description of the invention

The embodiment of the construction method of bored pile of the present invention is described below in conjunction with accompanying drawing.Those of ordinary skill in the art should be realized that, in the case of without departing from the spirit of the present invention, can revise by various different mode to described embodiment.Therefore, embodiment is illustrative in essence, instead of for limiting the scope of the invention.

The present embodiment is used for composite construction stratum, and refer to Fig. 1, it comprises Soft Soil Layer 6, sand stone layer 7, rubble boulder bed 8 and lithosphere 9.The construction process of the construction method of bored pile of the present invention is as follows:

First, the first step is guide pile position, determines stake position needed for job site according to construction drawing; Then vertically push-bench is assembled, refer to Fig. 1,5 are leaned on to be arranged on pull bar 4 the rear of push-bench, by pull bar 4 fixation on the ground, jack 1 being installed on the rear of push-bench leans on 5, position is right against the normal position of stake, by push-bench can pulling-back type head 2 to connect with steel pipe joint 3 and together be fixed to the rear below leaning on 5 and jack 1 of described push-bench, make the dead in line of the axis of described steel pipe joint 3 and the head 2 of described push-bench.Described head 2 can select arbitrary dimension model.

Second step, starts described push-bench, and described head 2 and described steel pipe joint 3 are crept into vertically downward by the rear active force leaning on 5 to provide of push-bench, refer to Fig. 2, every propelling downwards one segment distance, and between jack 1 and head 2, new steel pipe joint 3 is installed in adjunction; The diameter of this steel pipe joint 3 is determined by the diameter of required boring, and length adopts construction module, and the drilling depth of described push-bench is controlled accurately by the steel pipe joint quantity of regular length; After new steel pipe joint 3 installation, described head 2 continues downward propelling, and continue in progradation to install new steel pipe joint 3, so circulate propelling; Mode of being unearthed in progradation selects screw machine to be unearthed or mud and water balance system is unearthed.

Then, 3rd step, hole to after reaching the predetermined degree of depth of design, refer to Fig. 3, progressively retracted by the passage in steel pipe joint 3 that extract can pulling-back type head 2, the injected hole of pulling-back type head 2 inside progressively can inject concrete slurry 10 in bored stake holes meanwhile by push-bench, the height of the injection of concrete slurry 10 is along with can exiting of pulling-back type push-bench head 2 and raising.

Finally, the 4th step, push-bench can exit ground completely by pulling-back type head 2, pour into post simultaneously and also complete and build, refer to Fig. 4, after the concrete curing time terminates, castinplace pile solidification forming.

In the present invention, size and the degree of depth of described push-bench boring can adjust according to practice of construction field condition, and carry out adjusting a cubic metre of earth formula according to stratum, job site geological condition.

From description above with put into practice, adopt the present invention to carry out construction drill castinplace pile, simplify construction sequence, improve construction overall efficiency, achieve high efficiency pore-forming; Improve borehole wall-protection intensity simultaneously, have great control to ground deformation; Again, achieve full-automation and the mechanization of work progress, construction safety coefficient increases greatly.

Claims (3)

1. a construction method for bored pile, is characterized in that: described construction method comprises the following steps:
A) guide pile position, vertically assembles push-bench, is fixed to the rear by the below with jack of described push-bench, makes the dead in line of the head of the axis of described steel pipe joint and described push-bench together with the head of this push-bench and steel pipe joint being connected also;
B) start described push-bench described head and described steel pipe joint to be crept into vertically downward, every propelling downwards one segment distance, between described jack and head, be hinged with new steel pipe joint, after installation, described head continues to creep into, and so circulation advances downwards;
C) boring is to after predetermined hole depth, is progressively retracted by the head of described push-bench and extracts stake holes, meanwhile by the internal duct of described push-bench progressively to concrete perfusion slurries in stake holes;
D) described head exits ground completely, has poured into simultaneously, after the concrete curing time terminates, and castinplace pile solidification forming.
2. the construction method of bored pile according to claim 1, is characterized in that: described push-bench adopts push pipe mode to carry out stake holes and creeps into.
3. the construction method of bored pile according to claim 1, is characterized in that: described step b) in, the unearthed mode of described push-bench adopts screw machine to be unearthed or mud and water balance control technology is unearthed.
CN201510472010.XA 2015-08-05 2015-08-05 Construction method for cast-in-situ bored pile CN105064334A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510472010.XA CN105064334A (en) 2015-08-05 2015-08-05 Construction method for cast-in-situ bored pile

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CN105064334A true CN105064334A (en) 2015-11-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107059907A (en) * 2017-06-15 2017-08-18 北京市市政工程研究院 A kind of construction method for the pin-connected panel tubular construction that utilization push pipe head is excavated

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2329707Y (en) * 1998-05-04 1999-07-21 地质矿产部勘探技术研究所 Pipe tamper
JPH11200363A (en) * 1998-01-08 1999-07-27 Nkk Corp Cast-in-place pile, building method therefor, and steel pipe member with blade used therefor
CN2383888Y (en) * 1999-07-07 2000-06-21 李训华 Improved fast pile-driver
CN101105032A (en) * 2006-07-10 2008-01-16 张厚 Hydraulic ceiling coil pore-forming technique and device
CN101173517A (en) * 2006-10-31 2008-05-07 上海市基础工程公司 Pile-pulling construction method
CN101736744A (en) * 2009-12-25 2010-06-16 张子良 Self-balancing sinking large-diameter tubular pile and construction method thereof
CN102605772A (en) * 2012-04-05 2012-07-25 深圳市金泰建设工程有限公司 Construction method for revolving digging cast-in-place pile
CN104265321A (en) * 2014-08-06 2015-01-07 上海隧道工程有限公司 Ultra-large full-face rectangular pipe jacking tunneling construction method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11200363A (en) * 1998-01-08 1999-07-27 Nkk Corp Cast-in-place pile, building method therefor, and steel pipe member with blade used therefor
CN2329707Y (en) * 1998-05-04 1999-07-21 地质矿产部勘探技术研究所 Pipe tamper
CN2383888Y (en) * 1999-07-07 2000-06-21 李训华 Improved fast pile-driver
CN101105032A (en) * 2006-07-10 2008-01-16 张厚 Hydraulic ceiling coil pore-forming technique and device
CN101173517A (en) * 2006-10-31 2008-05-07 上海市基础工程公司 Pile-pulling construction method
CN101736744A (en) * 2009-12-25 2010-06-16 张子良 Self-balancing sinking large-diameter tubular pile and construction method thereof
CN102605772A (en) * 2012-04-05 2012-07-25 深圳市金泰建设工程有限公司 Construction method for revolving digging cast-in-place pile
CN104265321A (en) * 2014-08-06 2015-01-07 上海隧道工程有限公司 Ultra-large full-face rectangular pipe jacking tunneling construction method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107059907A (en) * 2017-06-15 2017-08-18 北京市市政工程研究院 A kind of construction method for the pin-connected panel tubular construction that utilization push pipe head is excavated

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Application publication date: 20151118