CN107653878A - Cast-in-situ bored pile is reusable to be longitudinally separated formula steel pile casting construction - Google Patents

Cast-in-situ bored pile is reusable to be longitudinally separated formula steel pile casting construction Download PDF

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Publication number
CN107653878A
CN107653878A CN201610590653.9A CN201610590653A CN107653878A CN 107653878 A CN107653878 A CN 107653878A CN 201610590653 A CN201610590653 A CN 201610590653A CN 107653878 A CN107653878 A CN 107653878A
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CN
China
Prior art keywords
pile casting
steel pile
semicanal
cast
reusable
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Pending
Application number
CN201610590653.9A
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Chinese (zh)
Inventor
王琴
傅弘纲
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ANJI ZHENGYUAN WPC DECORATION MATERIAL Co Ltd
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ANJI ZHENGYUAN WPC DECORATION MATERIAL Co Ltd
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Priority to CN201610590653.9A priority Critical patent/CN107653878A/en
Publication of CN107653878A publication Critical patent/CN107653878A/en
Pending legal-status Critical Current

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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
    • E02D5/38Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/385Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes

Abstract

A kind of cast-in-situ bored pile of present invention offer is reusable to be longitudinally separated formula steel pile casting construction, and it comprises the following steps:(1)Surveying setting-out, bury casing;(2)Drill hole of drilling machine, and steel pile casting is with proceeding to desired depth;(3)Measure hole depth, first time borehole cleaning;(4)Steel reinforcement cage and installation conduit are installed, carry out second of borehole cleaning;(5)Filling concrete;(6)After concrete solidification, steel pile casting is torn open, extracted, the steel pile casting that can be reused.

Description

Cast-in-situ bored pile is reusable to be longitudinally separated formula steel pile casting construction
Technical field
The invention belongs to Architectural Equipment field, and in particular, it is related to, and cast-in-situ bored pile is reusable to be longitudinally separated Formula steel pile casting construction.
Background technology
In the work progress of cast-in-situ bored pile, steel pile casting is in spud pile position, protection aperture, maintenance head height etc. Have the function that irreplaceable.For most of cast-in-situ bored pile, steel pile casting is not involved in the stress of pile foundation, therefore in theory Construction should be pulled out after terminating, but during practice of construction, the recovery of steel pile casting often runs into three main difficulties: First, the solidification of concrete causes extraction steel pile casting to produce disturbance to concrete and influence its intensity;Second, steel pile casting tilts Inestimable resistance will be caused etc. factor;Third, the length of steel pile casting is larger, pull-out resistance accordingly increases, it is necessary to match somebody with somebody in addition Standby large-scale crane, this will greatly increase production cost;Therefore, part engineering often abandons for the consideration of economic and technical Recovery to steel pile casting, or even the consumption of steel pile casting is directly included in cost by disposable amortization, this has resulted in great deal of steel Waste and cost increase, so being improved existing steel pile casting.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide a kind of steel pile casting that can be reused.
The present invention solves technical scheme used by above-mentioned technical problem:Cast-in-situ bored pile is reusable to be longitudinally separated formula Steel pile casting construction, comprises the following steps:(1)Surveying setting-out, bury casing;(2)Drill hole of drilling machine, and steel pile casting is with proceeding to Desired depth;(3)Measure hole depth, first time borehole cleaning;(4)Steel reinforcement cage and installation conduit are installed, carry out second of borehole cleaning;(5)It is mixed Solidifying soil perfusion;(6)After concrete solidification, steel pile casting is torn open, extracted.
Preferably, after rig is in place, base accomplishes fluently level, center of turntable and the centrical tolerance of stake with horizon rule Less than 20mm, error of the rotating disk on 4 directions is less than 1/300.
Preferably, the steel pile casting diameter is bigger 10cm than design stake footpath, steel pile casting center and stake position centerline deviation are not 20mm, casing and surrounding vertical must be more than, steel pile casting should expose original ground 40cm~60cm, is layered back around casing with clay Fill out compacting.
Preferably, hole perpendicularity deviation is pressed no more than 1/100 during drilling, drilling depth cannot be less than designing hole depth, surpass It cannot be greater than 30cm deeply.
Preferably, steel reinforcement cage merogenesis makes, length 9.0m, merogenesis is hung, and lifting is welded;The big knot of cage bar with 50% staggers, but face weld length should be greater than or equal to 10d;Weld width not should be greater than 0.7d, and thickness is not less than 0.35d.
Preferably, steel pile casting includes left semicanal and right semicanal, the left semicanal can combine shape with the section of right semicanal It is described to be arranged on left semicanal with being equipped with longitudinal flange on the end face of right semicanal into a complete circle, the left semicanal Connected between longitudinal flange on longitudinal flange and right semicanal by connector, the longitudinal flange on the left semicanal and right semicanal On longitudinal flange between form gap, the separator for being used for separating connector is provided with the gap.
Preferably, the both ends of the cylinder are equipped with transverse flange.
Preferably, the separator includes separating knife and connecting rope, the connecting rope is connected with separating knife.
Preferably, the left semicanal is welded with hanger with right semicanal.
The beneficial effects of the invention are as follows:Steel pile casting diameter is bigger 10cm than design stake footpath, steel pile casting center and stake position center line Deviation cannot be greater than 20mm, casing and surrounding vertical, can facilitate steel pile casting attended operation, and after rig is in place, base must be used Horizon rule accomplishes fluently level, reaches smooth, firm, to ensure not run-off the straight and movement in drilling;When steel pile casting is reclaimed, Connector is separated first, is pulled connecting rope, is enabled to separating knife to be moved in gap, so as to cut off connector so that Left semicanal separates with right semicanal, then after cylinder directly is splitted into two halves, first pulls the hanger being arranged on left semicanal, left semicanal with After slow setting soil stake separation, the hanger on right semicanal is pulled, resistance when reclaiming cylinder thus can be greatly reduced and to concrete The influence of pile body, when cylinder is connected with cylinder, it is attached by the cylinder of transverse flange two, connector is preferably Iron wire, while certain intensity can be born, additionally it is possible to so that separating knife is easily cut off, so that when separation more Convenient, this engineering method principle is simple, easy to use, practical, maintenance cost is low, has stronger applicability and promotional value, Enabling to steel pile casting, construction cost is relatively low using often.
Brief description of the drawings
Fig. 1 is the structural representation of steel pile casting of the present invention;
Fig. 2 is the structural representation of separator of the present invention.
In figure:1st, left semicanal;2nd, right semicanal;3rd, hanger;4th, separating knife;5th, connecting rope;6th, transverse flange;7th, longitudinal method It is blue.
Embodiment
Formula steel pile casting construction, its feature are longitudinally separated referring to figs. 1 to shown in Fig. 2, cast-in-situ bored pile is reusable It is:Comprise the following steps:(1)Surveying setting-out, bury casing;(2)Drill hole of drilling machine, and steel pile casting is with proceeding to desired depth; (3)Measure hole depth, first time borehole cleaning;(4)Steel reinforcement cage and installation conduit are installed, carry out second of borehole cleaning;(5)Filling concrete; (6)After concrete solidification, steel pile casting is torn open, extracted;
After rig is in place, base accomplishes fluently level with horizon rule, and center of turntable is less than 20mm, rotating disk with the centrical tolerance of stake Error on 4 directions is less than 1/300;
The steel pile casting diameter is bigger 10cm than design stake footpath, and steel pile casting center cannot be greater than 20mm with stake position centerline deviation, protect Cylinder and surrounding vertical, steel pile casting should expose original ground 40cm~60cm, be tamped around casing with clay back-filling in layers;
Hole perpendicularity deviation, which is pressed, during drilling is no more than 1/100, and drilling depth cannot be less than designing hole depth, and ultra-deep cannot be greater than 30cm;
Steel reinforcement cage merogenesis is made, and length 9.0m, merogenesis is hung, and lifting is welded;The big knot of cage bar staggers with 50%, but face Weld length should be greater than or equal to 10d;Weld width not should be greater than 0.7d, and thickness is not less than 0.35d;
Steel pile casting includes left semicanal and right semicanal, and the left semicanal can combine to form one completely with the section of right semicanal Circle, the left semicanal is with being equipped with longitudinal flange, the longitudinal flange being arranged on left semicanal and the right side on the end face of right semicanal Connected between longitudinal flange on semicanal by connector, the longitudinal flange on the left semicanal and the longitudinal flange on right semicanal Between form gap, the separator for being used for separating connector is provided with the gap, the both ends of the cylinder are equipped with transverse direction Flange, the separator include separating knife and connecting rope, and the connecting rope is connected with separating knife, the left semicanal and right semicanal It is welded with hanger.
The geologic information provided according to construction drawing(Bored pile construction position geology is divided into backfill, sand bed, silty and glued Soil, silt clay, mud, gravel layer), and cast-in-situ bored pile design parameter(End-bearing pile, stake footpath 800mm, stake is long to be justified with entering Gravel bed 800mm is defined), determine cast-in-situ bored pile pore-creating machinery for GPS-10 or GPS-15 types convolution rig;
Cast-in-situ bored pile design stake footpath is 800mm, and steel pile casting internal diameter should be bigger 100~200mm than design stake footpath, determines in steel pile casting Footpath is 900mm;Data of surveying is mended according to address, layer of sand buried depth is 3.5m~10.5m below original ground, determines that steel pile casting length is 11.5m~12.0m;
Steel pile casting is rolled using 8mm thickness A3 steel plates and formed, and length, site operation machinery, construction can be actually used according to steel pile casting Condition is divided into 2 semicircles or 4 1/4 circles;Obvious numeral mark should be marked on every steel pile casting, is easy to Rapid Combination, For ease of the installation and dismounting of steel pile casting, it is respectively 2.5m~3.0m often to save length;Transverse flange is used between two section steel pile castings Drilled bolt connection, and 12 Φ 21mm bolts hole, 8 floors are uniformly laid on flange.Four during to reduce steel pile casting press-in, extracting The frictional force of all soil layers, it is 12mm from flange thickness, width 30mm, the flange with nodal plate and the junction of piece is cut into 45 ° of angles, with the connection saved between steel pile casting using longitudinal flange drilling iron wire colligation connection, to ensure that separating knife passes through performance Well, longitudinal flange spacing 30mm.The spacing of wells is 300mm on longitudinal flange, is connected using No. 8 iron wire colligations;
Welding hanger 1 is right on the downside of every steel pile casting flange suitable for reading, and hanger is bent using Φ 18mmA3 round steel and formed, and periphery is protected with steel Cylinder welding.As the attachment means for being longitudinally separated formula steel pile casting, hanger material is forbidden to replace using screw-thread steel, and steel wire rope uses Φ 16 models(6*37+1FC), for convenience of dismantling, connection is buckled using U-shaped between steel wire rope and hanger;
Stake position is released using total powerstation by design drawing requirement, makes elevation, stake position central spot plugs bar dowel and is identified as circle The heart;
Casing diameter is bigger 10cm than design stake footpath, if casing center cannot be greater than 20mm, casing and week with stake position centerline deviation Enclose vertically, for ease of steel pile casting attended operation, steel pile casting should expose original ground 50cm or so, be layered back around casing with clay Fill out compacting;
After rig is in place, base must accomplish fluently level with horizon rule, reach smooth, firm, to ensure not run-off the straight in drilling And movement;Center of turntable should be less than 20mm with the centrical tolerance of stake, and error of the rotating disk on 4 directions is less than 1/300;
This engineering the drilling perfusion pile length is 22.0m or so, and 12.0m or so below original ground need to bury steel pile casting, for convenience of steel The extraction that is embedded and ensureing steel pile casting of casing, need to bury steel pile casting part and use 900mm drill bit pore-formings, be changed into after penetrating layer of sand 800mm drill bits pore-forming extremely designs stake bottom elevation;
In pore forming process, maximum rate of penetration cannot be greater than 1.0m/min, when creeping into silt clay, suitable control pressure Power(5~25kpa of clay, 5~15kpa of sand)And rotating speed(40~70r/min of clay, sand 40r/min, minimum pump amount are 50m/h), prevent it is expanding excessive, and will less carry drilling tool, should gently be carried when changing drilling rod, with avalanche prevention hole;
In pore forming process, often creeping into 2.0~3.0m or so needs in time to be pressed into steel pile casting, prevents the hole that collapses, steel pile casting needs all the time Basset 50cm or so, is easy to the overlap joint of two section steel pile castings;
The viscosity control of mud is less than 4.0% in 18~20s, silt content;In argillic horizon during pore-forming, the proportion control of mud is exported System is 1.15~1.20, in pore-forming during sandy soils, layer of sand etc. easily collapse hole soil layer, the specific gravity control of deslagging mud 1.20~ 1.30, and the less mud of silt content should be selected;
Drilling pouring pile hole perpendicularity deviation, which is pressed, is no more than 1/100, and drilling depth cannot be less than designing hole depth, and ultra-deep must not be big In 30cm;
Pouring pile hole should make full use of drilling rod to carry out first time borehole cleaning in the original location, until slurry is returned in aperture to bottom hole designed elevation For proportion continuously less than 1.10-1.20, the work of first time borehole cleaning can be terminated less than 50mm by measuring bottom hole sediment thickness;
Steel reinforcement cage merogenesis is made, and length 9.0m, merogenesis is hung, and lifting is welded;The big knot of cage bar staggers with 50%, but face Weld length should be greater than or equal to 10d;Weld width not should be greater than 0.7d, and thickness is not less than 0.35d.Fabrication of reinforcing cage deviation control System is shown in Table;
Fabrication of reinforcing cage deviation controls
In order to ensure that the placement depth of steel reinforcement cage meets designed elevation, specific elevation dimension is determined by builder before laying, it is determined that Hangs muscle length, to ensure deviation within ± 100mm.When steel reinforcement cage is hung into hole, hole wall must not be collided, to prevent from irrigating coagulation Steel reinforcement cage displacement and rising phenomenon occur when native, to that must fix after design attitude under steel reinforcement cage, to ensure protection of steel bar gabion Layer deviation ± 20mm, cage top, bottom absolute altitude deviation are between ± 50mm, when steel reinforcement cage is hung, it should be ensured that drilling is same with steel reinforcement cage Heart degree;
Drilling pours a concrete and uses 250mm diameter pipes, and the sealing property of conduit should be checked before installation, that is, checks conduit whether there is leakage Water, the fine or not situation of conduit connection sealing ring should be according to the long accurate metering pipe total length of stake.
After steel reinforcement cage, conduit install, should as early as possible, carry out secondary pile hole cleaning, re-enter 1.05~1.08 new mud Slurry is circulated, and the mud that a large amount of boring muds are suspended with stake holes is replaced out, and clean-out opening bottom.Mud balance is necessary after borehole cleaning Within 1.20, precipitation thickness is less than 50mm;
The perfusion of underwater concrete should be carried out after second of borehole cleaning in 30min, slump control 18~22cm it Between.Underwater gliders should be carried out continuously, and depth of tremie should control cannot be less than 2.0m in 5.0~7.0m, the minimum depth.Fill Design more than stake top absolute altitude 80cm must be exceeded by noting pile concrete influx height;
Cast-in-place pile concrete hole to be drilled can carry out steel pile casting and remove work when reaching 70% of design strength or so, underwater general For 7 days or so, underground was generally 3 days or so;Dismantling step is as follows:
(1)The separator preset using lifting machine (can use the stake machine or PC220 excavators of bored concrete pile) lifting, was lifted Using the iron wire between cutter cut-out casing longitudinal flange in journey, steel pile casting is set to be separated into 2 or 4(It can be led to according to geological condition Overtesting determines);
(2)After steel pile casting separation, the hanger that steel pile casting is connected using steel wire rope is extracted steel pile casting piecewise.
Embodiment described above is a kind of preferable scheme of the present invention, not the present invention is made any formal Limitation, there are other variants and remodeling on the premise of without departing from the technical scheme described in claim.

Claims (9)

1. cast-in-situ bored pile is reusable to be longitudinally separated formula steel pile casting construction, it is characterised in that:Comprise the following steps:
(1)Surveying setting-out, bury casing;
(2)Drill hole of drilling machine, and steel pile casting is with proceeding to desired depth;
(3)Measure hole depth, first time borehole cleaning;
(4)Steel reinforcement cage and installation conduit are installed, carry out second of borehole cleaning;
(5)Filling concrete;
(6)After concrete solidification, steel pile casting is torn open, extracted.
2. cast-in-situ bored pile according to claim 1 is reusable to be longitudinally separated formula steel pile casting construction, its feature It is:After rig is in place, base accomplishes fluently level with horizon rule, and center of turntable is less than 20mm with the centrical tolerance of stake, turns Error of the disk on 4 directions is less than 1/300.
3. cast-in-situ bored pile according to claim 1 is reusable to be longitudinally separated formula steel pile casting construction, its feature It is:The steel pile casting diameter is bigger 10cm than design stake footpath, and steel pile casting center cannot be greater than 20mm with stake position centerline deviation, protect Cylinder and surrounding vertical, steel pile casting should expose original ground 40cm~60cm, be tamped around casing with clay back-filling in layers.
4. cast-in-situ bored pile according to claim 1 is reusable to be longitudinally separated formula steel pile casting construction, its feature It is:Hole perpendicularity deviation, which is pressed, during drilling is no more than 1/100, and drilling depth cannot be less than designing hole depth, and ultra-deep cannot be greater than 30cm。
5. cast-in-situ bored pile according to claim 1 is reusable to be longitudinally separated formula steel pile casting construction, its feature It is:Steel reinforcement cage merogenesis is made, and length 9.0m, merogenesis is hung, and lifting is welded;The big knot of cage bar staggers with 50%, but face Weld length should be greater than or equal to 10d;Weld width not should be greater than 0.7d, and thickness is not less than 0.35d.
6. cast-in-situ bored pile according to claim 1 is reusable to be longitudinally separated formula steel pile casting construction, its feature It is:Steel pile casting includes left semicanal and right semicanal, and the left semicanal can combine to form one completely with the section of right semicanal Circle, the left semicanal is with being equipped with longitudinal flange, the longitudinal flange being arranged on left semicanal and the right side on the end face of right semicanal Connected between longitudinal flange on semicanal by connector, the longitudinal flange on the left semicanal and the longitudinal flange on right semicanal Between form gap, the separator for being used for separating connector is provided with the gap.
7. cast-in-situ bored pile according to claim 6 is reusable to be longitudinally separated formula steel pile casting construction, its feature It is:The both ends of the cylinder are equipped with transverse flange.
8. cast-in-situ bored pile according to claim 7 is reusable to be longitudinally separated formula steel pile casting construction, its feature It is:The separator includes separating knife and connecting rope, and the connecting rope is connected with separating knife.
9. cast-in-situ bored pile according to claim 8 is reusable to be longitudinally separated formula steel pile casting construction, its feature It is:The left semicanal is welded with hanger with right semicanal.
CN201610590653.9A 2016-07-23 2016-07-23 Cast-in-situ bored pile is reusable to be longitudinally separated formula steel pile casting construction Pending CN107653878A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112092154A (en) * 2019-06-17 2020-12-18 陕西晟泰源水泥制品有限公司 Prefabricated inspection well preformed hole forming device and forming method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102720186A (en) * 2012-07-10 2012-10-10 上海港务工程公司 Underwater once pouring method for variable cross-section bored cast-in-place pile
CN102995632A (en) * 2012-11-21 2013-03-27 中国石油天然气集团公司 Cast-in-situ bored pile technique
CN103615001A (en) * 2013-11-27 2014-03-05 宁波盛宏建设工程有限公司 Bored pile construction method for reinforcing cage framework layered installation
CN204690743U (en) * 2015-03-12 2015-10-07 温州宏源水电建设有限公司 A kind of steel pile casting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102720186A (en) * 2012-07-10 2012-10-10 上海港务工程公司 Underwater once pouring method for variable cross-section bored cast-in-place pile
CN102995632A (en) * 2012-11-21 2013-03-27 中国石油天然气集团公司 Cast-in-situ bored pile technique
CN103615001A (en) * 2013-11-27 2014-03-05 宁波盛宏建设工程有限公司 Bored pile construction method for reinforcing cage framework layered installation
CN204690743U (en) * 2015-03-12 2015-10-07 温州宏源水电建设有限公司 A kind of steel pile casting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112092154A (en) * 2019-06-17 2020-12-18 陕西晟泰源水泥制品有限公司 Prefabricated inspection well preformed hole forming device and forming method

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Application publication date: 20180202