CN109577197A - A kind of construction method of thick sand bed Pile In Karst Area - Google Patents

A kind of construction method of thick sand bed Pile In Karst Area Download PDF

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Publication number
CN109577197A
CN109577197A CN201811307666.6A CN201811307666A CN109577197A CN 109577197 A CN109577197 A CN 109577197A CN 201811307666 A CN201811307666 A CN 201811307666A CN 109577197 A CN109577197 A CN 109577197A
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CN
China
Prior art keywords
construction
pile
drilling
sand bed
steel pile
Prior art date
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.)
Pending
Application number
CN201811307666.6A
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Chinese (zh)
Inventor
安东阁
刘继鹏
庞前凤
张学良
王渊博
徐小燕
陈登舟
霍耀耀
马玉峰
汪艺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway 22nd Bureau Group Co Ltd
China Railway 22nd Bureau Group Urban Rail Engineering Co., Ltd.
Original Assignee
China Railway 22nd Bureau Group Co Ltd
China Railway 22nd Bureau Group Urban Rail Engineering Co., Ltd.
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.)
Filing date
Publication date
Application filed by China Railway 22nd Bureau Group Co Ltd, China Railway 22nd Bureau Group Urban Rail Engineering Co., Ltd. filed Critical China Railway 22nd Bureau Group Co Ltd
Priority to CN201811307666.6A priority Critical patent/CN109577197A/en
Publication of CN109577197A publication Critical patent/CN109577197A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/10Deep foundations
    • E02D27/12Pile foundations

Abstract

The invention discloses a kind of construction methods of thick sand bed Pile In Karst Area, including steel pile casting treatment process or cement stabilization treatment process.It is proved by the Construction practices of two kinds of measures, especially to be had a clear superiority in terms of cost control, artificial and operation using redrilling after cement stabilization compared with the measure that steel pile casting follows up, is greatly improved work efficiency, accelerates progress, remarkable in economical benefits.By the construction technology research to thick sand bed karst pile foundation, unfavorable geology karst piling Technology is grasped, the technique and engineering method of similar geological condition karst pile foundation construction are formed.By this engineering construction, construction experience is had accumulated, provides technological reserve for other similar engineering.

Description

A kind of construction method of thick sand bed Pile In Karst Area
Technical field
The present invention relates to technical field of building construction more particularly to a kind of construction methods of thick sand bed Pile In Karst Area.
Background technique
In bridge construction, such as bridge process, and mainly with across being set with rivers, as hydrology bridge.Bridge site landforms Type is based on river second bottom, and front and back abutment is nearby located at high terrace, and river second bottom, topography is flat open, ground Absolute altitude is in 40~42m or more;It is warded off as paddy field, local wasteland, trunk river is same rivers on the way, and water channel and pool are fragmentary more Distribution;The area of part construction area nearby takes sand to form about 160m one wide, the deeply big pool of about 6~8m because of excavation, at present Layer of sand is also in exploitation, therefore, very big difficulty will be present in this kind of territorial environment construction bridge.
So quality controls the big engineering of difficulty for complex geologic conditions, need by being applied to thick sand bed karst pile foundation Work technology is studied, so as to improve the economic benefit of pile foundation construction, guarantees construction quality, safety, schedule requirement, after being Continuous layer of sand karst pile foundation construction provides foundation.
Summary of the invention
The object of the present invention is to provide one kind be subsequent layer of sand karst pile foundation construction provide convenience and construct according to According to thick sand bed Pile In Karst Area construction method.
To achieve the goals above, the invention provides the following technical scheme:
A kind of construction method of thick sand bed Pile In Karst Area of the invention, including following technique:
Steel pile casting treatment process or cement stabilization treatment process.
Further, when which uses steel pile casting treatment process, mainly include the following steps:
The selection of S1, test pile;
S2, pile foundation steel pile casting follow-up construction technology;
S3, cost analysis.
Further, when construction is using steel pile casting treatment process, in the step S1:
63-1# pile foundation, stake diameter 1.0m, hole depth 33m are chosen in steel pile casting measure of following up, and sand layer thickness reaches 9.7m.
Further, when construction is using steel pile casting treatment process, in the step S2:
Steel pile casting wall thickness uses the steel plate of δ=14mm, weld seam all double grooves weldering, every section production length be 3m, 6m, 9m;
The step S2 pile foundation steel pile casting follow-up construction technology specifically includes that
A1, levelling of the land and positioning;
A2, outer steel pile casting is buried;
A3, outer steel pile casting is buried;
A4, punching to solution cavity top;
Processing at the top of A5, solution cavity;
A6, decentralization steel pile casting;
A7, normal pore-forming to stake bottom absolute altitude.
Further, when which uses cement stabilization treatment process, mainly include the following steps:
The selection of B1, test pile;
The selection of B2, drilling machine;
B3, cement stabilization construction technology;
B4, cost analysis.
Further, when construction is using cement stabilization treatment process, in the step B1:
63-2# pile foundation, stake diameter 1.0m, hole depth 23.5m are chosen in cement stabilization measure, and sand layer thickness reaches 7.7m.
Further, when construction is using cement stabilization treatment process, in the step B2:
Drilling machine selects CZ-80 percussive drill, the rated power 75KW of the drilling machine, and the stroke of the drilling machine is 50~ 110cm。
Further, when construction is using cement stabilization treatment process, in the step B3:
Drilling is earlier to select φ 1.5m drill bit to creep into bedrock surface position, and mud balance is enlarged to not in drilling process mesoporous Less than 1.5g/cm3, bagged cement is added in drilling process in drilling, promotion is uniform by cement and mud mix up and down for drill bit, To be drilled proceed to after bedrock surface stagnates 2 days mud and reaches certain intensity in conjunction with cement;
It changes the outfit and φ 1.0m drill bit and creeps into again, mud balance is maintained between 1.2~1.4 in drilling process mesoporous, is bored Machine is normally crept into up to use small stroke drilling machine in pore-forming, drilling process, and stroke controls between 0.5~0.8m.
In the above-mentioned technical solutions, the construction method of a kind of thick sand bed Pile In Karst Area provided by the invention, have with It is lower the utility model has the advantages that
Construction technology of the invention can choose two kinds of construction methods, i.e. steel pile casting treatment process and cement stabilization handles work Skill, wherein proved by the Construction practices of two kinds of measures, especially followed up with redrilling after use cement stabilization compared with steel pile casting Measure has a clear superiority in terms of cost control, artificial and operation, is greatly improved work efficiency, accelerates progress, Remarkable in economical benefits.By the construction technology research to thick sand bed karst pile foundation, unfavorable geology karst piling Technology is grasped, Form the technique and engineering method of similar geological condition karst pile foundation construction.By this engineering construction, construction experience is had accumulated, is Other similar engineering provides technological reserve.
Specific embodiment
A kind of construction method of thick sand bed Pile In Karst Area of the invention, including following technique:
Steel pile casting treatment process or cement stabilization treatment process.
Preferably, in above-mentioned construction method, when which uses steel pile casting treatment process, mainly include the following steps:
The selection of S1, test pile;
S2, pile foundation steel pile casting follow-up construction technology;
S3, cost analysis.
Further, when construction is using steel pile casting treatment process, in step S1:
63-1# pile foundation, stake diameter 1.0m, hole depth 33m are chosen in steel pile casting measure of following up, and sand layer thickness reaches 9.7m.
Further, when construction is using steel pile casting treatment process, in step S2:
Steel pile casting wall thickness uses the steel plate of δ=14mm, weld seam all double grooves weldering, every section production length be 3m, 6m, 9m;
Step S2 pile foundation steel pile casting follow-up construction technology specifically includes that
A1, levelling of the land and positioning;
A2, outer steel pile casting is buried;
A3, outer steel pile casting is buried;
A4, punching to solution cavity top;
Processing at the top of A5, solution cavity;
A6, decentralization steel pile casting;
A7, normal pore-forming to stake bottom absolute altitude.
Steel pile casting wall thickness uses the steel plate of δ=14mm, rolls processing and fabricating in factory's domestic appliance concentration, weld seam is all double Face groove welding, every section production length are 3.0m, 6.0m, 9,0m, and steel pile casting follow-up mainly prevents from causing in pile foundation drilling process The collapse hole of chiltern overburden layer and surface layer.The drill bit of φ 1.0m is extended to φ 1.2m first, above normal drilling to solution cavity about At 1m, equipment is squeezed into using truck crane ancillary vibration hammer etc., steel pile casting merogenesis is squeezed into soil layer to scar.
At normal drilling to about 1m above solution cavity, 150KW vibration hammer is assisted using 25T truck crane, first by steel pile casting merogenesis Soil layer is squeezed into scar, then carries out back drilled as holes.In the work progress of sinking steel pile casting, vibration hammer must be steady, securely welds At the top of steel pile casting, and it is placed in the middle in the plan-position of casing top surface, avoid bias that casing is caused to generate inclination as far as possible.It adopts simultaneously With the verticality of the good each section casing connection of horizontal ruler strict control, it must not exceed the 1/200 of job specfication, it is vertical to make every effort to steel pile casting It buries.If once discovery has the tendency that deflection, corrected at once, it would be possible to which the unfavorable factor glanced off is eliminated in rudiment shape In state.
The attachment weld of each section steel pile casting is all fully welded using two-sided bevel, and the seam of two section casings removes welding Outside, also the straight degree of casing body need to be made to reach to guarantee that its size is accurate in the reinforcement steel band that seam crossing welds 50mm wide, δ=10mm To requirement, the vertical walls of entire interior casing are in line.Such as the requirement of verticality supergage, then interface position is leveled using parallels, Then two section steel pile castings are welded, after preliminarily stabilised, then are fully welded.After weld seam is cooling, the whereabouts construction of steel pile casting is carried out, Above-mentioned operation circulation carries out.
The weight of every meter of steel pile casting is 10.92Kg/m2*1m*3.768m=41.147Kg, and the unit price for being transported to scene is 4700 Member/T, every meter of steel pile casting material cost are 4700*0.041147=193.4 member;Mechanical equipment: 2000 yuan/machine-team of crane, vibration Hammer 1200 yuan/machine-team, the welding of scene cooperation casing, installer 4 (200 yuan/work day) into shape, steel pile casting uses the form of follow-up It is installed, pile foundation creeps into period average out to 4 days to bedrock surface and steel pile casting welding installation, and in summary factor uses steel The measure cost-per-meter valence of casing follow-up is about 1843 yuan.
It preferably, mainly include walking as follows when which uses cement stabilization treatment process in above-mentioned construction method It is rapid:
The selection of B1, test pile;
The selection of B2, drilling machine;
B3, cement stabilization construction technology;
B4, cost analysis.
Further, when construction is using cement stabilization treatment process, in step B1:
63-2# pile foundation, stake diameter 1.0m, hole depth 23.5m are chosen in cement stabilization measure, and sand layer thickness reaches 7.7m.
Further, when construction is using cement stabilization treatment process, in step B2:
Drilling machine selects CZ-80 percussive drill, the rated power 75KW of drilling machine, and the stroke of drilling machine is 50~110cm.
Further, when construction is using cement stabilization treatment process, in step B3:
Drilling is earlier to select φ 1.5m drill bit to creep into bedrock surface position, and mud balance is enlarged to not in drilling process mesoporous Less than 1.5g/cm3, bagged cement is added in drilling process in drilling, promotion is uniform by cement and mud mix up and down for drill bit, To be drilled proceed to after bedrock surface stagnates 2 days mud and reaches certain intensity in conjunction with cement;
It changes the outfit and φ 1.0m drill bit and creeps into again, mud balance is maintained between 1.2~1.4 in drilling process mesoporous, is bored Machine is normally crept into up to use small stroke drilling machine in pore-forming, drilling process, and stroke controls between 0.5~0.8m.
Pile foundation is crept into bedrock surface position, and 5 workers (200 yuan/work day) amount in the process is added packed water in pile foundation Mud 3.8t (every linear meter(lin.m.) needs cement 0.49t) is stagnated after 2 days cement slurries reach some strength in conjunction with cement and is re-started drilling (foramen primum to be drilled into is deep, stops drilling after borehole cleaning, creeps into again after cement rendering dado solidification);Bagged cement cost is 350 yuan/T, Pile foundation is crept into bedrock surface drilling cycle average out to 4 days, and in summary factor is about using cement stabilization measure cost-per-meter valence 690 yuan.
In the above-mentioned technical solutions, the construction method of a kind of thick sand bed Pile In Karst Area provided by the invention, have with It is lower the utility model has the advantages that
Construction technology of the invention can choose two kinds of construction methods, i.e. steel pile casting treatment process and cement stabilization handles work Skill, wherein proved by the Construction practices of two kinds of measures, especially followed up with redrilling after use cement stabilization compared with steel pile casting Measure has a clear superiority in terms of cost control, artificial and operation, is greatly improved work efficiency, accelerates progress, Remarkable in economical benefits.By the construction technology research to thick sand bed karst pile foundation, unfavorable geology karst piling Technology is grasped, Form the technique and engineering method of similar geological condition karst pile foundation construction.By this engineering construction, construction experience is had accumulated, is Other similar engineering provides technological reserve.
It is above that certain exemplary embodiments of the invention are only described by way of explanation, undoubtedly, for ability The those of ordinary skill in domain without departing from the spirit and scope of the present invention can be with a variety of different modes to institute The embodiment of description is modified.

Claims (8)

1. a kind of construction method of thick sand bed Pile In Karst Area, which is characterized in that including following technique:
Steel pile casting treatment process or cement stabilization treatment process.
2. a kind of construction method of thick sand bed Pile In Karst Area according to claim 1, which is characterized in that the construction is adopted When with steel pile casting treatment process, mainly include the following steps:
The selection of S1, test pile;
S2, pile foundation steel pile casting follow-up construction technology;
S3, cost analysis.
3. a kind of construction method of thick sand bed Pile In Karst Area according to claim 2, which is characterized in that construction uses When steel pile casting treatment process, in the step S1:
63-1# pile foundation, stake diameter 1.0m, hole depth 33m are chosen in steel pile casting measure of following up, and sand layer thickness reaches 9.7m.
4. a kind of construction method of thick sand bed Pile In Karst Area according to claim 2, which is characterized in that construction uses When steel pile casting treatment process, in the step S2:
Steel pile casting wall thickness uses the steel plate of δ=14mm, and all double groove welderings of weld seam, every section production length is 3m, 6m, 9m;
The step S2 pile foundation steel pile casting follow-up construction technology specifically includes that
A1, levelling of the land and positioning;
A2, outer steel pile casting is buried;
A3, outer steel pile casting is buried;
A4, punching to solution cavity top;
Processing at the top of A5, solution cavity;
A6, decentralization steel pile casting;
A7, normal pore-forming to stake bottom absolute altitude.
5. a kind of construction method of thick sand bed Pile In Karst Area according to claim 1, which is characterized in that the construction is adopted When with cement stabilization treatment process, mainly include the following steps:
The selection of B1, test pile;
The selection of B2, drilling machine;
B3, cement stabilization construction technology;
B4, cost analysis.
6. a kind of construction method of thick sand bed Pile In Karst Area according to claim 5, which is characterized in that construction uses When cement stabilization treatment process, in the step B1:
63-2# pile foundation, stake diameter 1.0m, hole depth 23.5m are chosen in cement stabilization measure, and sand layer thickness reaches 7.7m.
7. a kind of construction method of thick sand bed Pile In Karst Area according to claim 5, which is characterized in that construction uses When cement stabilization treatment process, in the step B2:
Drilling machine selects CZ-80 percussive drill, the rated power 75KW of the drilling machine, and the stroke of the drilling machine is 50~110cm.
8. a kind of construction method of thick sand bed Pile In Karst Area according to claim 5, which is characterized in that construction uses When cement stabilization treatment process, in the step B3:
Drilling is earlier to select φ 1.5m drill bit to creep into bedrock surface position, and mud balance, which is enlarged to, in drilling process mesoporous is not less than Bagged cement is added in drilling process in drilling by 1.5g/cm3, and promotion is uniform by cement and mud mix up and down for drill bit, to be drilled It proceeds to after bedrock surface and stagnates 2 days mud and reach certain intensity in conjunction with cement;
It changes the outfit and φ 1.0m drill bit and creeps into again, mud balance is maintained between 1.2~1.4 in drilling process mesoporous, and drilling machine is just Often up to use small stroke drilling machine in pore-forming, drilling process, stroke controls between 0.5~0.8m drilling.
CN201811307666.6A 2018-11-05 2018-11-05 A kind of construction method of thick sand bed Pile In Karst Area Pending CN109577197A (en)

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CN107905118A (en) * 2017-12-26 2018-04-13 杭州市城市建设基础工程有限公司 Large bridge pile base construction method
CN107938676A (en) * 2017-11-21 2018-04-20 重庆建工市政交通工程有限责任公司 A kind of pile base construction method for passing through full packing type solution cavity
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103469789A (en) * 2013-09-30 2013-12-25 中铁二十局集团有限公司 Karst-area underwater bridge pier drilled pile construction method
JP2016180249A (en) * 2015-03-24 2016-10-13 五洋建設株式会社 Pile head part joining method and pile head part support structure for precast concrete member
CN105714772A (en) * 2016-02-22 2016-06-29 北龙建设集团有限公司 Re-drilling concrete wall protecting method for hole formation of rock-socketed pile in karst region
CN205399438U (en) * 2016-02-22 2016-07-27 北龙建设集团有限公司 Karst area embedded rock pile pore -forming bores concrete dado structure again
CN107938676A (en) * 2017-11-21 2018-04-20 重庆建工市政交通工程有限责任公司 A kind of pile base construction method for passing through full packing type solution cavity
CN107938650A (en) * 2017-12-22 2018-04-20 中交第三航务工程局有限公司宁波分公司 The method for filling and treating of underground karst cavity
CN108149672A (en) * 2017-12-22 2018-06-12 中交第三航务工程局有限公司宁波分公司 The processing method of underground karst cavity
CN107905118A (en) * 2017-12-26 2018-04-13 杭州市城市建设基础工程有限公司 Large bridge pile base construction method
CN108589718A (en) * 2018-03-30 2018-09-28 中交路桥北方工程有限公司 Piles in Karst Region base construction method

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