CN103321217A - Composite foundation pile for lava regions - Google Patents
Composite foundation pile for lava regions Download PDFInfo
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- CN103321217A CN103321217A CN2013102681972A CN201310268197A CN103321217A CN 103321217 A CN103321217 A CN 103321217A CN 2013102681972 A CN2013102681972 A CN 2013102681972A CN 201310268197 A CN201310268197 A CN 201310268197A CN 103321217 A CN103321217 A CN 103321217A
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Abstract
The invention discloses a composite foundation pile for lava regions, and belongs to the technical field of pile foundation construction for large-tonnage roads, bridges and houses in the building industry. The composite foundation pile for the lava regions comprises a CFG (cement fly-ash gravel) pile and two or more precast end-bearing piles, and is characterized in that the precast end-bearing piles are arranged in the CFG pile, one type of filling sand, fine stone particles, slag, concrete and the like or one or a plurality of mixtures of the filling sand, the fine stone particles, the slag, the concrete and the like is mixed to form the CFG pile, and the precast end-bearing piles are positioned in the CFG pile. The composite foundation pile has the advantages that the composite foundation pile is simple in structure, easy to implement and wide in applicable geological environments, the quality of the pile and the construction speed can be guaranteed, the cost further can be reduced, and the problem of difficulty in applying static-pressure high-tonnage precast end-bearing piles to the lava geological regions can be 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 ground composite pile for the lava area.
Background technology
Existing patented technology such as application number are 200510040317.9 patent of invention " construction process for composite pile of foundation and pile tip displacement regulating device thereof ", this invention provides a kind of construction process for composite pile of foundation that inhomogeneous granite residual soil uses that is suitable for, 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 ground composite pile for the 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: a kind of ground composite pile for the lava area, made by CFG stake and prefabricated end bearing pile, it is characterized in that: comprise prefabricated end bearing pile more than two or two in the described ground composite pile, described CFG stake is made with one or more mixture mixs wherein such as inserts sand, microlith powder, slag, tabias; Described prefabricated end bearing pile is arranged in the CFG stake.
A kind of job practices of the ground composite pile for the lava area:
(1) pore-forming: with punching or drilling machine, in the position of setting, be pressed into 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: be pressed into prefabricated end bearing pile in the CFG stake with the high tonnage stake of static pressure machine in the hole, until the bearing stratum of design setting is pressed into prefabricated end bearing pile more than two or two by designing requirement, a kind of ground composite pile construction for the lava area is 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, convenient construction is only used the high tonnage pile machine equipment of punching or drilling machine and static pressure.
2, the 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 preformed pile 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 preformed pile 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, environmental protection.The ground composite pile is comprised of one or more mixture inserts in preformed pile 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 the three kinds of stakes 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.
Description of drawings
Fig. 1 is the structural representation of ground composite pile of the present invention.
Among the figure: CFG stake 1, prefabricated end bearing pile 2, prefabricated end bearing pile 3.
The specific embodiment
Below in conjunction with the description of drawings the invention process.A kind of ground composite pile for the lava area, made by CFG stake 1 and reinforced concrete prefabricated end bearing pile 2, reinforced concrete prefabricated end bearing pile 3, it is characterized in that: the mixture mixs such as described CFG stake 1 usefulness inserts sand, microlith powder, slag, tabia are made; Described reinforced concrete prefabricated end bearing pile 2 and reinforced concrete prefabricated end bearing pile 3 are arranged in CFG stake 1.
A kind of job practices of the ground composite pile for the lava area:
(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 reinforced concrete prefabricated end bearing pile more than two or two by designing requirement, a kind of ground composite pile construction for the lava area is finished.
The present invention is not only applicable in the lava area, and all can use at various geological environments.
Claims (1)
1. ground composite pile that is used for the lava area, made by CFG stake and prefabricated end bearing pile, it is characterized in that: comprise prefabricated end bearing pile more than two or two in the described ground composite pile, described CFG stake is made with one or more mixture mixs wherein such as inserts sand, microlith powder, slag, tabias; Described prefabricated end bearing pile is arranged in the CFG stake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102681972A CN103321217A (en) | 2013-06-19 | 2013-06-19 | Composite foundation pile for lava regions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102681972A CN103321217A (en) | 2013-06-19 | 2013-06-19 | Composite foundation pile for lava regions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103321217A true CN103321217A (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102681972A Pending CN103321217A (en) | 2013-06-19 | 2013-06-19 | Composite foundation pile for lava regions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917402A (en) * | 2017-03-20 | 2017-07-04 | 陈甫 | A kind of CFG pile precast piles head and CFG pile construction methods |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0552366B2 (en) * | 1986-05-07 | 1993-08-05 | Tokyu Kensetsu Kk | |
| 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 |
| CN201943069U (en) * | 2010-12-01 | 2011-08-24 | 张继红 | Precast compacting-enlarging 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 |
-
2013
- 2013-06-19 CN CN2013102681972A patent/CN103321217A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0552366B2 (en) * | 1986-05-07 | 1993-08-05 | Tokyu Kensetsu Kk | |
| 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 |
| CN201943069U (en) * | 2010-12-01 | 2011-08-24 | 张继红 | Precast compacting-enlarging 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917402A (en) * | 2017-03-20 | 2017-07-04 | 陈甫 | A kind of CFG pile precast piles head and CFG pile construction methods |
| CN106917402B (en) * | 2017-03-20 | 2019-03-05 | 陈甫 | A kind of CFG pile precast pile head and CFG pile construction method |
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Application publication date: 20130925 |