CN1113530A - Construction method of foundation piles on soft stratum - Google Patents
Construction method of foundation piles on soft stratum Download PDFInfo
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- CN1113530A CN1113530A CN 95101013 CN95101013A CN1113530A CN 1113530 A CN1113530 A CN 1113530A CN 95101013 CN95101013 CN 95101013 CN 95101013 A CN95101013 A CN 95101013A CN 1113530 A CN1113530 A CN 1113530A
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- pipe
- hole
- stake
- stake pipe
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The method for building foundation piles, especially the piles in stratum under sea, river and lake include such steps as inserting auger drill in column tube, drilling in while dropping the tube down, forming a space cavity at the lower end of the column tube, taking auger drill up and making the top of the column tube over the water level, expanding the cavity by explosion in it, inserting reinforcing bar cage in it, and pouring concrete to form a foundation pile with bigger lower end.
Description
The present invention relates to a kind of job practices of foundation pile, especially refer to the construction method of foundation piles on stratum at the bottom of seabed, the rivers and lakes.
At present, the tradition construction method of foundation piles has two kinds, wherein a kind of driller's method of directly getting into the cave by auger, because of getting out the uneven structural instability of convex-concave, in whole getting into the cave under the impact of fluid concrete, the instability of hole wall (loose structure soil layer) structure soil block can be brought in the concrete ground foundation pile, reduce the foundation pile quality, the hole wall is to foundation pile holding power also deficiency (frictional force) simultaneously, only depend on the end, hole to support, for the hole wall of soft stratum (as: stratum at the bottom of depression, rivers and lakes and the ocean) in addition avalanche appears and the hole under fall into; Another kind is to insert deep drilling downwards gradually in the steel column pipe with auger, the stake pipe also drops to the end thereupon gradually, after taking out auger, the piling bar pipe is up carried one section, then pour into a mould a section concrete, step pouring concrete and form foundation pile according to this, it is less that the unstable structure piece of hole wall is brought the concrete ground foundation pile into, but owing to need maintain about one month when the fluid concrete of water-bed stratum, actual piling bar pipe is to withdraw from, have to lose piling bar pipe (corroding gradually) on water-bed stratum, cause waste, the hole wall holding power deficiency that gets out simultaneously is also little with hole end contact area at the bottom of the foundation pile again, therefore, foundation pile is still sunk easily.
In view of this, the purpose of this invention is to provide the construction method of foundation piles on a kind of soft stratum, insert with auger in the stake pipe of stacked connection, deep drilling is under the stake pipe, under the stake pipe, explode again, and the stake pipe firmly forms the foundation pile of form upside down of pestering with cast-in-situ concrete.
The object of the present invention is achieved like this: its key step is:
One, insert in the column jecket with auger, get into the cave in the limit, the stake tube edge descends, and up to the approaching hole bottom of desiring to punch, a stake pipe stops to descend, and auger still gets out hole, a space outside this pipe bottom;
Two, take out auger, adjust each pipe end face and be on the same horizontal plane;
Three, in hole, the space of stake pipe bottom, throw in the blasting charge, the blast of then igniting enlarges the hole, space, lateral dimension especially, simultaneously closely knit hole soil layer;
Four, plant reinforcing bar dragon in stake pipe hollow and hole, above-mentioned space;
Five, cast-in-situ concrete is full of hole, above-mentioned space and stake pipe hollow, makes stake pipe, reinforcing bar dragon and cast-in-situ concrete firmly condense into the foundation pile of form upside down of pestering.
Above-mentioned stake pipe is to be exposed to give by stake pipe on the band shoulder, several king-pile pipe and one to stay a following pipe of reinforcing bar to constitute, and each other successively to bore the stacked combination of end face.
Above-mentioned stake pipe is the concrete pile pipe, also can be plastics stake pipe.
Because adopt such scheme: not only wall holding power in hole is big, and support area in the end, hole enlarges again, add that the hole bottom is closely knit, therefore foundation pile can not sunk, and the intensity height of foundation pile own, appearance are not subject to the side shearing corrosion of water slug and destroy, in addition, be convenient to make each foundation pile end face on a horizontal plane.
The present invention is further described below in conjunction with drawings and Examples:
Hole, the space blast view of Fig. 1 exemplary embodiments of the present invention.
Fig. 2 exemplary embodiments plant of the present invention reinforcing bar dragon view.
Fig. 3 exemplary embodiments cast-in-situ concrete of the present invention view.
Among the figure: 1, stake pipe 11, go up stake pipe 12, king-pile pipe 13, following and manage 131, give and stay that reinforcing bar 2, the blasting charge 3, space cheat 4, the reinforcing bar dragon
The key step of exemplary embodiments construction of the present invention is:
One, insert stake pipe 1(concrete pile pipe with auger) in, stake pipe 1-limit descends when getting into the cave on one side, up near the hole bottom (by the degree of depth of foundation pile requirements) desiring to punch, stake pipe 1 stops to descend, and auger still gets out a space and cheats 3 outside this manages 1 bottom; Its king-pile pipe 1 is to be exposed by stake pipe 11 on the band shoulder, several king-pile pipe 12 and one to give following of staying reinforcing bar 131 and manage 13 and constitute, and each other successively with the awl stacked combination of end face (detachable structure), this pipe 1 can be the concrete pile pipe, also can be plastics stake pipe;
Two, taking-up auger, the stake of going up of adjustment and replacing differing heights manages 11, makes with pipe 1 end face to be on the same horizontal plane, so that the building on the foundation pile needs;
Three, in the space hole 3 of 1 bottom is managed in stake, throw in the blasting charge 2, lead-in wire is outside stake pipe end face, and the blasting charge 2 is lighted in control then, through blast the hole, space is enlarged, lateral dimension especially, and stratum, closely knit hole strengthens the holding power on stratum, hole simultaneously;
Four, manage plant reinforcing bar dragon 4 in 1 hollow and the hole 3, above-mentioned space in stake, to increase the intensity of foundation pile;
Five, cast-in-situ concrete is full of hole, above-mentioned space 3 and stake pipe 1 hollow, makes reinforcing bar dragon 4, stake pipe 1(especially give and stay reinforcing bar 131) firmly condense into the foundation pile of form upside down of pestering with cast-in-situ concrete.
The present invention has following advantage in sum:
One, the foundation pile peripheral wall is to give pile pipe processed and hole wall friction holding power is big, and carrying is big, gives again the corrosion of side shearing and destruction that pile pipe processed is not subject to water slug;
Two, the bottom of foundation pile is the mushroom capitiform, thereby big with hole bottom contact area, and carrying is big;
Three, foundation pile is firmly to be condensed by pile pipe, reinforcing bar dragon and cast-in-place concrete, intensity height own;
Four and the foundation pile end face easily be adjusted at a horizontal plane, be convenient to the needs of superstructure.
Claims (3)
1, the construction method of foundation piles on a kind of soft stratum is characterized in that construction sequence is:
One, insert in the column jecket with auger, get into the cave in the limit, the stake tube edge descends, and up to the approaching hole bottom of desiring to punch, a stake pipe stops to descend, and auger still gets out hole, a space outside this pipe bottom;
Two, take out auger, adjust each pipe end face and be on the same horizontal plane;
Three, in the hole, space of stake pipe bottom, throw in the blasting charge, the blast of then igniting enlarges the hole, space, especially lateral dimension, stratum, closely knit hole simultaneously;
Four, plant reinforcing bar dragon in stake pipe hollow and hole, above-mentioned space;
Five, cast-in-situ concrete is full of hole, above-mentioned space and stake pipe hollow, and stake pipe, reinforcing bar dragon and cast-in-situ concrete firmly condense into the foundation pile of form upside down of pestering.
2, by the construction method of foundation piles on the described soft stratum of claim 1, it is characterized in that: above-mentioned stake pipe is by stake pipe on the band shoulder, and several king-pile pipes and one expose the following pipe that gives staying reinforcing bar and constitutes, and each other successively to bore the stacked combination of end face.
3, by the construction method of foundation piles on the described soft stratum of claim 1, it is characterized in that: above-mentioned stake pipe is concrete pile pipe or plastics stake pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95101013 CN1113530A (en) | 1995-01-05 | 1995-01-05 | Construction method of foundation piles on soft stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95101013 CN1113530A (en) | 1995-01-05 | 1995-01-05 | Construction method of foundation piles on soft stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1113530A true CN1113530A (en) | 1995-12-20 |
Family
ID=5073732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95101013 Pending CN1113530A (en) | 1995-01-05 | 1995-01-05 | Construction method of foundation piles on soft stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1113530A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100429353C (en) * | 2006-06-27 | 2008-10-29 | 中国矿业大学 | Explosion-enlarging stake construction process |
| CN101153489B (en) * | 2006-09-21 | 2010-06-16 | 王国奋 | Bottom expanding and piling method by demolishing of pipe sank prefabricated steel concrete bottom expansion pile |
| CN101153490B (en) * | 2006-09-21 | 2010-06-23 | 王国奋 | Bottom expanding and piling method by demolishing of pipe sank prefabricated steel concrete bottom expansion pile |
-
1995
- 1995-01-05 CN CN 95101013 patent/CN1113530A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100429353C (en) * | 2006-06-27 | 2008-10-29 | 中国矿业大学 | Explosion-enlarging stake construction process |
| CN101153489B (en) * | 2006-09-21 | 2010-06-16 | 王国奋 | Bottom expanding and piling method by demolishing of pipe sank prefabricated steel concrete bottom expansion pile |
| CN101153490B (en) * | 2006-09-21 | 2010-06-23 | 王国奋 | Bottom expanding and piling method by demolishing of pipe sank prefabricated steel concrete bottom expansion pile |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |