CN203346875U

CN203346875U - Foundation composite pile for lava area

Info

Publication number: CN203346875U
Application number: CN2013203834063U
Authority: CN
Inventors: 潘建杰; 蒋科化
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-06-19
Filing date: 2013-06-19
Publication date: 2013-12-18
Anticipated expiration: 2023-06-19

Abstract

The utility model provides a foundation composite pile for a lava area, and belongs to the technical field of pile foundation construction of large-tonnage roads, bridges and houses in the construction industry. The foundation composite pile for the lava area is composed of a CFG pile and prefabricated end bearing piles. The foundation composite pile for the lava area is characterized in that the CFG pile comprises two or more prefabricated end bearing piles, and the prefabricated end bearing piles are placed in the CFG pile. The foundation composite pile for the lava area is simple in structure, easy to implement, wide in applied geological environment, capable of guaranteeing the quality of the pile and capable of guaranteeing the construction speed and further lowering cost, and the difficult problem that the static pressure large-tonnage prefabricated pile end bearing piles are applied to lava geological areas can be solved.

Description

A kind of composite pile of the ground for the lava area

Technical field

The utility model belongs to the pile foundation construction technical field in builing industry large-tonnage road, bridge, house, is specifically related to a kind of composite pile of the ground for the lava area.

Background technology

The patent of invention that existing patented technology is 200510040317.9 as application number " 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 is used that is suitable for, in the lava geological environment, have slightly thick but while failing to reach the dirt band of design load bearing requirements, can't use when running into.

In 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 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.As residue at the bottom of hole is difficult for clearly totally, constriction easily occurring, pile shaft concrete strength is difficult to control, and concrete piles forms broken pile, and during detection, two, three class stakes occur more.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, during construction, by external force, by force preformed pile is pressed in soil, and pile body is subject 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 city, the area of geology low bearing capacity, be characterized in that noise is large, because use oil hammer, so serious environment pollution belongs to filtering technique and job practices.

The utility model content

Above-mentioned deficiency for prior art, the technical problems to be solved in the utility model is to provide a kind of composite pile of the ground for the lava area, its easy construction, and whole work progress noise is low, emission-free discharge, speed of application is fast, 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 existing high tonnage preformed pile of static pressure end bearing pile technology and be difficult to a difficult problem of using in lava geology area.

Technical scheme: a kind of composite pile of the ground for the lava area, by CFG stake and prefabricated end bearing pile, made, it is characterized in that: comprise prefabricated end bearing pile more than two or two in described ground composite pile, described for the CFG stake one or more mixture mixs wherein such as inserts sand, microlith powder, slag, tabia make; Described prefabricated end bearing pile is arranged in the CFG stake.

A kind of job practices of the composite pile of the ground 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 hole;

(2) perfusion inserts: punching or boring complete and, through after the assay was approved, insert conduit, and the form of construction work of pressing pouring concrete pile is poured into inserts in hole, make it form the CFG stake; Described inserts is one or more mixtures in sand, microlith powder, slag, 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 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 composite pile of the ground for the lava area has been constructed.

Of the present utility model simple in structure, to implement easily, applicable geological environment is wide, can guarantee the quality of stake, can guarantee speed of application again, can also reduce costs, can solve the difficult problem that the high tonnage preformed pile of static pressure end bearing pile uses in lava geology area, be a kind of job practices that is worthy to be popularized and uses.

Advantage of the present invention:

1, convenient construction, only use the high tonnage pile machine equipment of punching or drilling machine and static pressure.

2, the work progress noise is low, and emission-free discharge 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, without waiting it form intensity and carry out trace routine, as long as the CFG pile driving construction completes, followed by just being pressed into the precast reinforced concrete piles construction.

4, quality is good, with the high tonnage stake of static pressure machine, in hole, in the CFG stake, is pressed into preformed pile, during construction because precast pile is not subject 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, pile crown is hammered into shape broken can not occur yet, greatly improved seismic performance of building, especially in lava geology area, use, 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 house can not produce because sedimentation is uneven crack.

5, environmental protection.The ground composite pile is that one or more mixture inserts in preformed pile and sand, microlith powder, slag, tabia etc. form, and 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, while constructing because of filling concrete, pressure is larger, 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, many is more than ten times of design theory value, cause investment clearly to control.A kind of for the prefabricated end bearing pile in lava area, when in hole, the perfusion inserts makes it form the CFG pile driving construction, 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 accompanying drawing explanation

The structural representation that Fig. 1 is a kind of ground composite pile of the utility model.

In figure: CFG stake 1, prefabricated end bearing pile 2, prefabricated end bearing pile 3.

The specific embodiment

Below in conjunction with accompanying drawing explanation the utility model, implement.A kind of composite pile of the ground 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 use 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 composite pile of the ground 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 hole;

(3) piling: with the high tonnage stake of static pressure machine, be pressed into reinforced concrete prefabricated end bearing pile in the CFG stake in hole, 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 composite pile of the ground for the lava area has been constructed.

The utility model is not only applicable in the lava area, and all can use at various geological environments.

Claims

1. the composite pile of the ground 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 described ground composite pile, described prefabricated end bearing pile is arranged in the CFG stake.