CN103306275A - Construction method for preformed end bearing pile in lava region - Google Patents
Construction method for preformed end bearing pile in lava region Download PDFInfo
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- CN103306275A CN103306275A CN2013102706236A CN201310270623A CN103306275A CN 103306275 A CN103306275 A CN 103306275A CN 2013102706236 A CN2013102706236 A CN 2013102706236A CN 201310270623 A CN201310270623 A CN 201310270623A CN 103306275 A CN103306275 A CN 103306275A
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Abstract
A construction method for a preformed end bearing pile in a lava region belongs to the technical field of construction of a pile foundation of a large-tonnage road, bridge, or house in the building industry. The invention provides the construction method for the preformed end bearing pile in the lava region. The construction method for the preformed end bearing pile in the lava region is implemented according to the following sequences: (1) forming a pore; (2) pouring a filler; and (3) pressing the pile. A static pressure large-tonnage pile machine is used to press a reinforced concrete preformed end bearing pile in a CFG (cement flyash gravel) pile in the pore till a bearing stratum set in the design, and two or more reinforced concrete preformed end bearing piles are pressed according to the design requirements to complete the construction. The method provided by the invention is simple in operation, easy in implementation, and wide in scope of geological environments, both the quality of the pile and the construction speed are guaranteed, the cost is also lowered, and the difficult problem of application of the end bearing pile of the static pressure large-tonnage preformed pile in the lava region is solved.
Description
Technical field
The invention belongs to the pile foundation construction technical field in builing industry large-tonnage road, bridge, house, be specifically related to a kind of job practices for the prefabricated end bearing pile in lava area.
Background technology
Existing patented technology such as application number are 200810197604.4 patent of invention " a kind of job practices of static pressure high-tonnage precast end-bearing pile ", this invention belongs to the high tonnage preformed pile of a kind of static pressure end bearing pile construction technology, in the lava geological environment, have slightly thick but when failing to reach the dirt band of design load bearing requirements, can't use when running into.
In the prior art, the pile foundation construction in builing industry large-tonnage road, bridge, house mainly adopts four kinds of punching (brill) hole cast-in-place concrete piles, Static Pressure Precast Piles, driven precast pile, the high tonnage preformed pile of static pressure end bearing pile.Punching (brill) hole cast-in-place concrete pile: be mainly used in the high tonnage foundation construction of heavy caliber, be characterized in that pile body is long, diameter is large, can be deep to the rock stratum, but its cost is high, easily occurs running pulp during construction, destroys the geological hydrology environment; And long construction period, easily produce serious mass defect during construction.Be difficult for clearly totally constriction occuring easily such as residue at the bottom of the hole, pile shaft concrete strength is difficult to control, and concrete piles forms broken pile, and two, three class stakes occur more during detection.Static Pressure Precast Piles: be mainly used in city house foundation construction on the middle and senior level, be characterized in: pile body is long, and cost is high, and cushion cap is large, by force preformed pile is pressed in the soil with external force during construction, and pile body is subjected to external force excessive, cracky, and during detection, two, three class stakes occur more.More crucial is to be difficult to use at karst area and lava geological environment.Driven precast pile: be mainly used in away from the city, the area of geology low bearing capacity is characterized in that noise is large, because use oil hammer, so serious environment pollution belongs to filtering technique and job practices.
Summary of the invention
Above-mentioned deficiency for prior art, the technical problem to be solved in the present invention provides a kind of job practices for the prefabricated end bearing pile in lava area, its easy construction, and whole work progress noise is low, emission-free discharging, speed of application is fast, and is little to the geology Hydrological Effects, belongs to the environment-friendly type construction, the construction investment controllability is strong, pile quality is good, and applicable geological environment is wide, can solve the difficult problem that the existing high tonnage preformed pile of static pressure end bearing pile technology is difficult to use in lava geology area.
Technical scheme of the present invention is: a kind of job practices step in the following order for the prefabricated end bearing pile in lava area is carried out:
(1) pore-forming: with punching or drilling machine, in the position of setting, be pressed into reinforced concrete prefabricated end bearing pile quantity and take up an area dimensional requirement punching or boring by the plan regulation, until then the bearing stratum of design code is cleaned out residue in the hole;
(2) perfusion inserts: punching or boring are finished and through after the assay was approved, are inserted conduit, and the form of construction work of pressing pouring concrete pile is poured into inserts in the hole, make it form the CFG stake; Described inserts is one or more mixtures in sand, microlith powder, slag, the tabia etc.;
(3) piling: in the hole, be pressed into reinforced concrete prefabricated end bearing pile in the CFG stake with the high tonnage stake of static pressure machine, until the bearing stratum of design setting, be pressed into two or many reinforced concrete prefabricated end bearing piles by designing requirement, a kind of construction for the prefabricated end bearing pile in lava area finished.
Method of the present invention is simple to operate, implements easily, and applicable geological environment is wide, can guarantee quality of pile, can guarantee speed of application again, can also reduce cost, can solve the high tonnage preformed pile of static pressure end bearing pile in the difficult problem that lava geology area uses, be a kind of job practices that is worthy to be popularized and uses.
Advantage of the present invention:
1, construction equipment is convenient, only uses the high tonnage stake of punching or drilling machine and static pressure machine.
2, whole work progress noise is low, and emission-free discharging is little to the geology Hydrological Effects.
3, speed of application is fast, pore-forming is up to the standards and can pours into immediately inserts formation CFG stake, the CFG stake that inserts forms, do not bear the function of carrying, only play the effect of the bearing stratum of setting when soil removal and replacement makes precast reinforced concrete piles can be depressed into smoothly design and the construction of punching (brill) hole, need not to wait its formation intensity and carry out trace routine, as long as the CFG pile driving construction is finished, construct followed by just being pressed into precast reinforced concrete piles.
4, quality is good, is pressed into precast reinforced concrete piles in the CFG stake with the high tonnage stake of static pressure machine in the hole, during construction because precast pile is not subjected to the horizontal external effect, so precast pile can not be subject to breakage in installation.Because be preformed pile, so can not occur that constriction, pile shaft concrete strength are difficult to control, concrete piles forms broken pile yet, the phenomenon that Driven Piles pile body hammer splits, the pile crown hammer breaks can not occur yet, greatly improved seismic performance of building, especially use in lava geology area, bearing stratum is to reach the complete rock that design specifications requires, and bearing capacity is uniform and stable, settling amount is very little, and the house can not produce because sedimentation is uneven the crack.
5, belong to the environment-friendly type job practices, whole stake is comprised of one or more mixture inserts in precast reinforced concrete piles and sand, microlith powder, slag, the tabia etc., can not pollute surrounding enviroment and destroy the on-site geological hydrology environment of building project.
6, the investment controllability is strong, particularly in lava geology area, Static Pressure Precast Piles, driven precast pile, these three kinds of job practicess of the high tonnage preformed pile of static pressure end bearing pile can't directly be used basically, normally used is punching (brill) hole cast-in-place concrete pile, in lava geology area, its geological condition is more complicated all usually, generally there is Soft Soil Layer, rock crevice, the burning into sand layer, underground underground river, one or more phenomenons of fusion hole etc., when the Concrete Grouting Pale of punching (brill) hole, pressure is larger when constructing because of filling concrete, the stream slurry often appears, running pulp, the super filling problem of concrete is caused in swell aperture etc. of compressing, according to statistics, the super filling amount of concrete is minimum all reaches three times of design theory value, and many is more than ten times of design theory value, causes investment clearly to control.A kind of for the prefabricated end bearing pile in lava area, when the perfusion inserts makes it form the CFG pile driving construction in the hole, do not need intensified pressure, reduced stream slurry, running pulp, the compressing aperture problem that swells, preformed pile is can not change its shape and volume when construction, thereby reaches the investment controllability of building project.
The specific embodiment
A kind of job practices for the prefabricated end bearing pile in lava area, step is in the following order carried out:
(1) pore-forming: with punching or drilling machine, the position of setting, be pressed into reinforced concrete prefabricated end bearing pile quantity and take up an area dimensional requirement punching or boring by the plan regulation, until the bearing stratum of design code is (in the lava area, require punching or be bored into the complete rock stratum that reaches the design load bearing requirements), then residue in the hole is cleaned out;
(2) perfusion inserts: punching or boring are finished and through after the assay was approved, insert conduit, press the form of construction work of pouring concrete pile, in the hole, pour into inserts, make it form the CFG stake, the function of carrying is not born in the CFG stake that inserts forms, only play the effect of the bearing stratum of setting when soil removal and replacement makes precast reinforced concrete piles can be depressed into smoothly design and punching or drilling construction, need not to wait its formation intensity and carry out trace routine; Described inserts is one or more mixtures in sand, microlith powder, slag, the tabia etc.
(3) piling: in the hole, be pressed into reinforced concrete prefabricated end bearing pile in the CFG stake with the high tonnage stake of static pressure machine, until the bearing stratum of design setting, be pressed into two or many reinforced concrete prefabricated end bearing piles by designing requirement, a kind of construction for the prefabricated end bearing pile in lava area finished.
The present invention is not only applicable in the lava area, and all can use at various geological environments.
Claims (4)
1. job practices that is used for the prefabricated end bearing pile in lava area, it is characterized in that: described a kind of job practices step in the following order for the prefabricated end bearing pile in lava area is carried out:
(1) pore-forming: with punching or drilling machine, in the position of setting, be pressed into reinforced concrete prefabricated end bearing pile quantity and take up an area dimensional requirement punching or boring by the plan regulation, until then the bearing stratum of design code is cleaned out residue in the hole;
(2) perfusion inserts: punching or boring are finished and through after the assay was approved, are inserted conduit, and the form of construction work of pressing pouring concrete pile is poured into inserts in the hole, make it form the CFG stake;
(3) piling: in the hole, be pressed into reinforced concrete prefabricated end bearing pile in the CFG stake with the high tonnage stake of static pressure machine, until the bearing stratum of design setting, be pressed into two or many reinforced concrete prefabricated end bearing piles by designing requirement, a kind of construction for the prefabricated end bearing pile in lava area finished.
2. a kind of job practices for the prefabricated end bearing pile in lava area according to claim 1 is characterized in that: the described bearing stratum that directly hole is rushed or is drilled into design code with punching or drilling machine of step (1).
3. a kind of job practices for the prefabricated end bearing pile in lava area according to claim 1 is characterized in that: the amount of the described perfusion inserts of step (2) is to pour at the bottom of design the pile foundation cushion cap.
4. a kind of job practices for the prefabricated end bearing pile in lava area according to claim 1, it is characterized in that: described inserts is one or more mixtures in sand, microlith powder, slag, the tabia etc.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013102706236A CN103306275A (en) | 2013-06-19 | 2013-06-19 | Construction method for preformed end bearing pile in lava region |
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| CN2013102706236A CN103306275A (en) | 2013-06-19 | 2013-06-19 | Construction method for preformed end bearing pile in lava region |
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| CN103306275A true CN103306275A (en) | 2013-09-18 |
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| CN2013102706236A Pending CN103306275A (en) | 2013-06-19 | 2013-06-19 | Construction method for preformed end bearing pile in lava region |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459051A (en) * | 2020-11-09 | 2021-03-09 | 中国瑞林工程技术股份有限公司 | Construction method for solving problem of excessive irrigation and sediment of pile foundation in karst area |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1272573A (en) * | 2000-04-03 | 2000-11-08 | 王光明 | Lime concrete composite pile and its construction method |
| CN201190278Y (en) * | 2008-05-15 | 2009-02-04 | 浙江中富建筑集团股份有限公司 | Concrete long-corn cement soil composite pile |
| CN101672036A (en) * | 2008-11-12 | 2010-03-17 | 武汉天际建筑工程有限公司 | Construction method of static pressure high-tonnage precast end-bearing pile |
| JP4669494B2 (en) * | 2007-04-06 | 2011-04-13 | 新日本製鐵株式会社 | Steel pipe pile construction method |
| CN202730791U (en) * | 2012-08-10 | 2013-02-13 | 福建省华荣建设集团有限公司 | Composite pile foundation of building |
-
2013
- 2013-06-19 CN CN2013102706236A patent/CN103306275A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1272573A (en) * | 2000-04-03 | 2000-11-08 | 王光明 | Lime concrete composite pile and its construction method |
| JP4669494B2 (en) * | 2007-04-06 | 2011-04-13 | 新日本製鐵株式会社 | Steel pipe pile construction method |
| CN201190278Y (en) * | 2008-05-15 | 2009-02-04 | 浙江中富建筑集团股份有限公司 | Concrete long-corn cement soil composite pile |
| CN101672036A (en) * | 2008-11-12 | 2010-03-17 | 武汉天际建筑工程有限公司 | Construction method of static pressure high-tonnage precast end-bearing pile |
| CN202730791U (en) * | 2012-08-10 | 2013-02-13 | 福建省华荣建设集团有限公司 | Composite pile foundation of building |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112459051A (en) * | 2020-11-09 | 2021-03-09 | 中国瑞林工程技术股份有限公司 | Construction method for solving problem of excessive irrigation and sediment of pile foundation in karst area |
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Application publication date: 20130918 |