CN102535452A

CN102535452A - Novel engineering pile

Info

Publication number: CN102535452A
Application number: CN2010105891606A
Authority: CN
Inventors: 王云艇
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-15
Filing date: 2010-12-15
Publication date: 2012-07-04

Abstract

The invention relates to a novel engineering pile, which belongs to the technical field of buildings and pile foundations of structures. As a result, a new pile type, a new structure and an innovative construction method are adopted for improving single-pile bearing capacity, ensuring pile quality, avoiding pile scrappage during construction, accelerating construction progress and the like against the pile foundation being in line with the result. The technical scheme of the result comprises the following steps of: mechanical equipment is used for punching and drilling a pile hole till a supporting course, pumping slurry out of the hole without pouring concrete, hoisting a preformed pile into the hole till the lower end part of the pile reaches the supporting course, and sinking the preformed pile through a vibration method or a hammering method or other methods so as to insert the end of the pile into the supporting course by a certain scale; and filling up a gap between the preformed pile and the pile hole by pressure grouting so as to improve friction force in the lateral direction of the pile. When the preformed pile which is driven into the pile hole comprises multiple joints, the pile needs to be connected; and due to the particularity produced by implementation of the result, when the pile is connected, a fixer is required, and the structure and a using method of the fixer are of one part of contents of the result.

Description

A kind of new type of engineering stake

Affiliated technical field, background technology

Affiliated technical field: building, structure pile foundation technology field

Background technology: the existing technology that improves bearing capacity of single pile has stake end enlarged footing technology, two road enlarged footing technology (on pile body, doing enlarged footing).

Precast reinforced concrete piles buries behind the pile sinking, and bearing capacity of pile tip and pile body frictional resistance are all big, by the stake type of extensive employing, when ground has hard soil layer to penetrate, then should adopt other type.Long spiral shell is exerted pressure and irritated castinplace pile is new science and technology stake type, advantage many (short etc.) like the duration, and if its drill bit is the sharp subdrilling head of employing and on cutting edge, weld carbide bit; Then can bore hardpan; The length of this stake can reach 30m, when surpassing situation such as this length, also should adopt other types.The stake type of existing engineering piles has multiple, and various stake types are applicable to the situation that it is suitable for, and wants plasma discharge when multiple stake type is constructed, and can not the mud in the stake hole be drained entirely, and sediment can reduce the bearing capacity of stake at the bottom of the hole.

Many engineering piles might produce the situation that broken pile etc. is scrapped stake in construction.The books that reflect this achievement figure viewed from behind technology: " ground foundation engineering " (second edition), Chinese Water Conservancy water power publishing house 2010.3 second editions; " Foundation Design " China Electric Power Publishing House 2009.2 publishes; " ground and basis " BJ University Press 2010.10 publishes

Summary of the invention

The present invention adopts the job practices of new stake type, new construction and innovation, makes to be fit to use the pile foundation of this achievement to improve bearing capacity of single pile, to ensure quality of pile, to avoid constructing that king-pile is scrapped and accelerating construction progress etc., and this achievement technical scheme is:

1, dash, bore the stake hole to bearing stratum with plant equipment, after mud is extracted out in the hole, placing of concrete not; But will give in system stake lifting goes into, the through bearing stratum of stake end, a dimensioning bassets on the stake top; Then make and give the system stake and sink to some extent, make the stake end insert bearing stratum one dimensioning, thereby improve bearing capacity of pile tip with vibratory drilling method or hammering method or additive method; The space of giving between system stake and the stake hole is filled up with pressure grouting, thereby improves the frictional resistance of stake side direction.

2, for pressure grouting, the system of the giving stake of going into the post hole has two kinds of special constructions, and the first is equipped with grout pipe in the inboard of stake outer surface; It two is equipped with grout pipe in stake inside; The grout pipe of both of these case has many pulp holes on the side of stake external surface; This hole small pipeline outer with passing to stake is connected, and during pressure grouting, the pressure slurry gets into grout pipe and flows into the space between stake and the stake hole through the slurry outlet on its side, small pipeline; If also will be in the milk to the stake bottom, then grout pipe should extend the absolute altitude of stake bottom.

3, for a certain reason, the grouting that can take in addition has two kinds, and the first is by existing technology grouting, and it also is conventional giving the system pilework; It two is to make a grouting pipeline with giving system stake hollow part, and the horizontal small pipeline of hollow part and its side UNICOM is to an outer wall.

When 4, going into the giving system stake more piece is arranged an of hole, carry out will using a kind of fixator in the stake connection, its base plate is processed by steel plate; The centre is great circle hole Q, and Q is slightly little for the stake boring ratio, and fixator is placed on the aperture in a hole when using; The Q center overlaps with stake center, hole, and when two joint stakes were connected, joint stake A up grasped its position by lifting machine; Another joint below stake B insert among the Q and the certain size that bassets, pass the horizontal hole G of B stake upper end section with a pipe P, the P two ends are by two bearing supports on the fixator; This two bearing is positioned on the base plate at Q diameter line two ends, after connection A, the B two joint stakes; Mobile P pipe makes its disengaging B stake and operates lifting machine and lets two of A, B having connected move down, and the operating process of connection more piece stake by that analogy.

5, P pipe can a pipe; But also 2-section pipe, if adopt 2-section pipe, this 2-section pipe inserts the two ends of G hole respectively during use.

6, insert bearing stratum one dimensioning in the end of below pile cutoff in order to yield system stake, this pile cutoff lower end should be pointed metalwork.

7, to the stake hole and give the space between the system stake; Adopt the used material of slip casing by pressure; The additive etc. that research is used cement, clay, swell soil, flyash, fine sand and can be produced certain effect; Its blend proportion according to project situation experimentize select excellent, thereby ensure the quality of products and practice thrift engineering cost.

8, give employed innovation utensil in innovation structure and the construction of system stake; All to calculate, confirm size, grasp the principle of not only safety but also joint money with principles such as structural mechanics; Size is neither less than normal not bigger than normal yet, according to the engineering actual conditions confirm the calculated data that will use.

Description of drawings

Fig. 1 is the preformed pile constructional drawing that is equipped with grout pipe, and a. component is an elevation; B, c component are section legends.Each symbolic representation: 1-preformed pile; 2-pulp hole; The pointed metalwork in 3-stake bottom; The 4-grout pipe; 5-pulp small pipeline; 6-hollow preformed pile hollow part.

Fig. 2 is the fixator constructional drawing, comprises plan view and lateral view, each symbolic representation:

The 1-base plate; Da Yuan hole, 2-centre; The 3-bearing; The 4-bolt hole; 5-timber hole.

The specific embodiment

Be fit to use the pile foundation engineering of this achievement, its Construction unit and this achievement patentee implement this patent achievement in signatory back.

Claims

1. the present invention adopts the job practices of new stake type, new construction and innovation, makes to be fit to use the pile foundation of this achievement to improve bearing capacity of single pile, to ensure quality of pile, to avoid constructing that king-pile is scrapped and accelerating construction progress etc., and this achievement characteristic is:

Dash, bore the stake hole to bearing stratum with plant equipment, after mud is extracted out in the hole, placing of concrete not; But will give in system stake lifting goes into, the through bearing stratum of stake end, a dimensioning bassets on the stake top; Then make and give the system stake and sink to some extent, make the stake end insert bearing stratum one dimensioning, thereby improve bearing capacity of pile tip with vibratory drilling method or hammering method or additive method; The space of giving between system stake and the stake hole is filled up with pressure grouting, thereby improves the frictional resistance of stake side direction.

2. the new technology of raising bearing capacity of single pile according to claim 1 is characterized in that: for pressure grouting, the system of the giving stake of going into the post hole has two kinds of special constructions, and the first is equipped with grout pipe in the inboard of stake outer surface; It two is equipped with grout pipe in stake inside; The grout pipe of both of these case has many pulp holes on the side of stake external surface; This hole small pipeline outer with passing to stake is connected, and during pressure grouting, the pressure slurry gets into grout pipe and flows into the space between stake and the stake hole through the slurry outlet on its side, small pipeline; If also will be in the milk to the stake bottom, then grout pipe should extend the absolute altitude of stake bottom.

3. the new technology of raising bearing capacity of single pile according to claim 1 is characterized in that: for a certain reason, the grouting that can take in addition has two kinds, and the first is by existing technology grouting, and it also is conventional giving the system pilework; It two is to make a grouting pipeline with giving system stake hollow part, and the horizontal small pipeline of hollow part and its side UNICOM is to an outer wall.

4. the new technology of raising bearing capacity of single pile according to claim 1 is characterized in that: when going into the giving system stake more piece is arranged an of hole, carry out will using a kind of fixator in the stake connection; Its base plate is processed by steel plate, and the centre is great circle hole Q, and Q is slightly little for the stake boring ratio; Fixator is placed on the aperture in a hole when using, and the Q center overlaps with stake center, hole, when two joint stakes are connected; One joint stake A up grasps its position by lifting machine, another joint below stake B insert among the Q and the certain size that bassets, pass the horizontal hole G of B stake upper end section with a pipe P; The P two ends are by two bearing supports on the fixator, and this two bearing is positioned on the base plate at Q diameter line two ends, after connection A, the B two joint stakes;, mobile P pipe makes its disengaging B stake and operates lifting machine and lets two of A, B having connected move down, and the operating process of connection more piece stake is by that analogy.

5. fixator according to claim 4 is characterized in that: P pipe can a pipe; But also 2-section pipe, if adopt 2-section pipe, this 2-section pipe inserts the two ends of G hole respectively during use.

6. the new technology of raising bearing capacity of single pile according to claim 1 is characterized in that: insert bearing stratum one dimensioning in the end of below pile cutoff in order to yield system stake, this pile cutoff lower end should be pointed metalwork.

7. the new technology of raising bearing capacity of single pile according to claim 1; It is characterized in that: to the stake hole and give the space between the system stake; Adopt the used material of slip casing by pressure; The additive etc. that research is used cement, clay, swell soil, flyash, fine sand and can be produced certain effect, its blend proportion according to project situation experimentize select excellent, thereby ensure the quality of products and practice thrift engineering cost.

8. the new technology of raising bearing capacity of single pile according to claim 1; It is characterized in that: give employed innovation utensil in innovation structure and the construction of system stake; All to calculate, confirm size, grasp the principle of not only safety but also joint money with the structural mechanics principle; Size is neither less than normal not bigger than normal yet, according to the engineering actual conditions confirm the calculated data that will use.