CN103437336A - PVC hole-pipe gravel pile and soft foundation processing method thereof - Google Patents
PVC hole-pipe gravel pile and soft foundation processing method thereof Download PDFInfo
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- CN103437336A CN103437336A CN2013103800822A CN201310380082A CN103437336A CN 103437336 A CN103437336 A CN 103437336A CN 2013103800822 A CN2013103800822 A CN 2013103800822A CN 201310380082 A CN201310380082 A CN 201310380082A CN 103437336 A CN103437336 A CN 103437336A
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Abstract
The invention discloses a PVC hole-pipe gravel pile and a soft foundation processing method of the PVC hole-pipe gravel pile, and relates to the technical field of soft foundation processing. According to the structure of the PVC hole-pipe gravel pile, a concrete pile tip (60) and a novel pipe rock pile are connected with each other. The novel pipe rock pile comprises a PVC hole pipe (20) and a gravel pile body (10) arranged in the PVC hole pipe (20), wherein a novel cushion layer is arranged on the top of the novel pipe rock pile in a connected mode, and is connected with a first steel-plastic geogrid (31), a first gravel layer (41), a second steel-plastic geogrid (32), a second gravel layer (42) and a surface soil layer (50) in sequence, and a drainage system (70) is communicated with the novel cushion layer. According to the PVC hole-pipe gravel pile and the soft foundation processing method of the PVC hole-pipe gravel pile, construction is easy and convenient, cost is low, the controllable degree of quality is high, and the PVC hole-pipe gravel pile and the soft foundation processing method of the PVC hole-pipe gravel pile are applicable to a soft foundation processing project which is large in area, and has high requirements for the bearing capacity and differential settlement control.
Description
Technical field
The present invention relates to the soft foundation processing technology field, relate in particular to the method for a kind of PVC pipe broken stone pile with holes and soft ground treatment thereof.
Background technology
In infrastructure construction, soft foundation must carry out the ground processing because supporting capacity is low greatly with settlement after construction, to improve its bearing capacity, reduce distortion and to strengthen liquefaction performance resistivity.In current soft foundation is processed, broken stone pile is one of method of being used widely.Broken stone pile is to utilize the modes such as vibration, impact or water punching in soft foundation after pore-forming, again sandstone is squeezed in pore-forming, form the closely knit pile body formed by rubble of certain diameter, can performance displacement, the multiple actions such as compacted, draining and reinforcement, there are less expensive, easily construction and the characteristics such as speed is fast.But, because broken stone pile is comprised of granular material, after bearing load, can produce radial deformation, pile body easily produces bulging in weak soil around and destroys, and so just makes that drainage channel is impaired, pile strength reduces, and causes consolidation effect not good.For this reason, more existing patents have been carried out some improvement to this stake type:
1, a kind of concrete core broken stone pile (ZL:200610037621.2) of Zhao Wei Ping invention, adopt the stake core of Prefabricated Concrete stake as broken stone pile, bear vertical load and it is passed to lower sleeping hardpan, but the problem that this method still can not fine solution rubble bloats.
2, a kind of dual radial mesh cage broken stone pile (ZL:201020603436.7) of centre halfback Wang invention, stake side in broken stone pile arranges the lateral restraint cylinder mould, to improve the broken stone pile bearing capacity and to reduce sedimentation, but problem is the easy corrosion of rebar cylinder mould, its construction technology is also more complicated, and workmanship is difficult to control.
3, a kind of vertical tube type grating reinforced stone column (ZL:200620074257.2) of brilliant army invention, wrap up a tubular type geo-grid on the top of common broken stone pile periphery, limit lateral bloats distortion, improve bearing capacity, but the intensity of tubular type geo-grid is less, also only can effectively improve the top layer bearing capacity, limited to the raising effect of total bearing capacity.
As from the foregoing, utilize at present the method for broken stone pile soft ground treatment also to have some limitations at aspects such as bearing capacity and quality control on construction assurances; For this reason, the technical scheme that the present invention proposes can improve supporting capacity and the consolidation rate of broken stone pile significantly, promotes the treatment effect of soft foundation, produces good economic benefit.
Summary of the invention
Purpose of the present invention just is to overcome the shortcoming and defect that prior art exists, and the method for a kind of PVC pipe broken stone pile with holes and soft ground treatment thereof is provided.
The object of the present invention is achieved like this:
One, PVC pipe broken stone pile with holes
Be placed in the PVC pipe broken stone pile with holes in the underground hole of soft foundation, by broken stone pile, PVC pipe with holes, steel plastic geogrid, macadam, topsoil, concrete pile tip and drainage system, formed, steel plastic geogrid comprises the 1st steel plastic geogrid and the 2nd steel plastic geogrid, and macadam comprises the 1st macadam and the 2nd macadam;
From bottom to top, concrete pile tip and New pipe stone mar interconnect, and described New pipe stone mar comprises the broken stone pile arranged in PVC pipe with holes and pipe thereof;
Be connected with novel bed course at the top of New pipe stone mar, be connected with the 1st steel plastic geogrid, the 1st macadam, the 2nd steel plastic geogrid, the 2nd macadam and topsoil in turn;
Drainage system and novel bed course are communicated with;
The thickness of the 1st macadam and the 2nd macadam is 20～40cm, and the thickness of topsoil is 20～30cm.
Two, use the method for PVC pipe broken stone pile with holes soft ground treatment
This method comprises the following steps:
1. vibration sinking tube pore-forming
Adopt the vibrating type pile driver, on the earth's surface of soft foundation, by vibration, squeeze into, the pile driver immersed tube is vertically clamp-oned and sunk to projected depth in soft foundation, pile driver immersed tube bottom is placed prefabricated concrete pile tip in advance, with the pile driver immersed tube, together sink, after vibration sinking tube, formed a cylindrical shape underground hole-forming in soft foundation;
2. PVC pipe with holes is installed
Adopt the elevator wire sling on the vibrating type pile driver, the PVC pipe merogenesis with holes that the preprepared external diameter is slightly less than to pile driver immersed tube internal diameter is lowered in the pile driver immersed tube, between PVC pipe with holes, adopt union to carry out effectively connecting fast, the total length of PVC pipe with holes is consistent with designing pile length;
3. stone mar is managed in construction
By the hopper on the vibrating type pile driver, drop into sand material until be filled to earth's surface in PVC pipe with holes in the pile driver immersed tube, then the pile driver immersed tube slowly to be extracted, the broken stone pile in PVC pipe with holes and pipe is stayed in soft foundation, has formed the pipe stone mar;
4. lay bed course
Lay bed course on the top of pipe stone mar, lay successively the 1st steel plastic geogrid, the 1st macadam, the 2nd steel plastic geogrid, the 2nd macadam and topsoil from bottom to top;
Steel plastic geogrid adopts the steel moulding material, and the thickness of macadam 30 is 20～40cm, and the thickness of topsoil 50 is 20～30cm;
5. the construction drainage system, be connected with bed course.
Working mechanism:
After pipe stone mar, bed course and drainage system complete, form a kind of composite foundation; When applying preloading carrying out precompressed on composite foundation, the pore water of foundation soil is under the subsidiary stress effect, and the drainage channel formed by the pipe stone mar upwards enters in bed course, finally by drainage system, flows out; Foundation soil is constantly fixed in drainage procedure, intensity and non-deformability all are improved gradually, and pipe stone mar itself has possessed supporting capacity preferably due to PVC pipe constraint with holes being arranged, the speed that these have accelerated the foundation soil discharging consolidation on the whole, improved the supporting capacity of soft foundation.
The present invention has following advantages and good effect:
1. easy construction, cost is lower;
2. quality controllable degree is high, has improved soft foundation supporting capacity and non-deformability, has shortened the time that soft foundation is processed;
3. be suitable for larger area, bearing capacity and relative settlement are controlled to the soft foundation processing engineering had higher requirements.
The accompanying drawing explanation
Fig. 1 is the floor map of PVC pipe broken stone pile with holes.
Fig. 2 is the elevational schematic view of PVC pipe broken stone pile with holes.
In figure:
00-soft foundation, 01-earth's surface, 02-underground hole-forming;
10-broken stone pile;
20-PVC pipe with holes;
30-steel plastic geogrid, the 31-the 1 steel plastic geogrid, the 32-the 2 steel plastic geogrid;
40-macadam, the 41-the 1 macadam, the 42-the 2 macadam;
50-topsoil;
60-concrete pile tip;
70-drainage system;
A-pile driver immersed tube.
english to Chinese:
PVC:Polyvinylchlorid, be a kind of plastic pipe, and Main Ingredients and Appearance is polyvinyl chloride, adds in addition other one-tenth to assign to strengthen its heat resistance, toughness and ductility etc.
The specific embodiment
Below in conjunction with drawings and Examples, describe in detail:
One, PVC pipe broken stone pile with holes
As Fig. 1,2, be placed in the underground hole-forming 02 of soft foundation 00, by broken stone pile 10, PVC pipe 20 with holes, steel plastic geogrid 30, macadam 40, topsoil 50, concrete pile tip 60 and drainage system 70, formed; Steel plastic geogrid 30 comprises the 1st steel plastic geogrid 31 and the 2nd steel plastic geogrid 32, and macadam 40 comprises the 1st macadam 41 and the 2nd macadam 42;
From bottom to top, concrete pile tip 60 and New pipe stone mar interconnect, and described New pipe stone mar comprises the broken stone pile 10 arranged in PVC pipe 20 with holes and pipe thereof;
Be connected with novel bed course at the top of New pipe stone mar, described novel bed course is connected with the 1st steel plastic geogrid the 31, the 1st macadam the 41, the 2nd steel plastic geogrid the 32, the 2nd macadam 32 and topsoil 50 in turn;
The thickness of the 1st macadam 41 and the 2nd macadam 42 is respectively 20～40cm, and the thickness of topsoil 50 is 20～30cm.
Two, method
As Fig. 1,2, this method construction is simple, after in the pile driver immersed tube A that utilizes the vibrating type pile driver that concrete pile tip 60 will be installed squeezes into soft foundation 00, be lowered to PVC pipe 20 with holes, form broken stone pile 10 after recharging rubble, then steel plastic geogrid 30 and macadam 40 are laid respectively in layering, and are communicated with drainage system 70, finally fill topsoil 50, complete the processing to soft foundation 00.
The concrete step of implementing is gathered as follows:
1. vibration sinking tube pore-forming
Adopt the vibrating type pile driver, on the earth's surface 01 of soft foundation 00, by vibration, squeeze into, pile driver immersed tube A is vertically clamp-oned and sink to the interior projected depth of soft foundation 00, the bottom of pile driver immersed tube A is placed prefabricated concrete pile tip 60 in advance, with the pile driver immersed tube, A together sinks, after vibration sinking tube, formed a cylindrical shape underground hole-forming 02 in soft foundation 00;
Underground hole-forming 02 provides condition for the installation of PVC pipe 20 with holes and the filling of rubble.
2. PVC pipe 20 with holes is installed
Adopt the elevator wire sling on the vibrating type pile driver, PVC pipe 20 merogenesis with holes that the preprepared external diameter are slightly less than to pile driver immersed tube A internal diameter are lowered in pile driver immersed tube A, between PVC pipe 20 with holes, adopt union to carry out effectively connecting fast, the total length of PVC pipe 20 with holes is consistent with designing pile length;
Inserting as the filling of next step sand material and forming elongated even, closely knit and continuous broken stone pile 10 of PVC pipe 20 with holes provides assurance.
3. the New pipe stone mar of constructing
By the hopper on the vibrating type pile driver, drop into metaling until be filled to earth's surface 01 in PVC pipe 20 with holes in pile driver immersed tube A, then pile driver immersed tube A is slowly extracted, 10 of broken stone pile in PVC pipe 20 with holes and pipe thereof are stayed in soft foundation 00, have formed a kind of New pipe stone mar;
And the peripheral clearance that pile driver immersed tube A stays after extracting in soft foundation 00 will be by the retraction of the soil body automatic filling, after pile driver immersed tube A extracts, the New pipe stone mar can bear vertical load preferably, also can bear certain horizontal loading, good consolidation draining passage simultaneously, thus bearing capacity and the good effect of its fixed performance of quickening for improving soft foundation 00.
4. lay novel bed course
Lay the mattress layer on the top of New pipe stone mar, described novel bed course lays the 1st steel plastic geogrid the 31, the 1st macadam the 41, the 2nd steel plastic geogrid the 32, the 2nd macadam 32 and topsoil 50 from bottom to top successively;
Steel plastic geogrid adopts the steel moulding material, and the thickness of macadam 30 is 20～40cm, and the thickness of topsoil 50 is 20～30cm.
Novel bed course like this can play the bearing capacity that improves earth's surface 01, coordinates stake, native sedimentation and the effect such as top drainage passage is provided.
5. the construction drainage system 70, with novel bed course, are connected.
The underground water that assurance New pipe stone mar and novel bed course ooze out is discharged in time.
Claims (2)
1. a PVC pipe broken stone pile with holes is characterized in that:
Be placed in the underground hole-forming (02) of soft foundation (00), by broken stone pile (10), PVC pipe with holes (20), steel plastic geogrid (30), macadam (40), topsoil (50), concrete pile tip (60) and drainage system (70), formed, steel plastic geogrid (30) comprises the 1st steel plastic geogrid (31) and the 2nd steel plastic geogrid (32), and macadam (40) comprises the 1st macadam (41) and the 2nd macadam (42);
From bottom to top, concrete pile tip (60) and New pipe stone mar interconnect, and described New pipe stone mar comprises the broken stone pile (10) arranged in PVC pipe with holes (20) and pipe thereof;
Be connected with novel bed course at the top of New pipe stone mar, described novel bed course is connected with the 1st steel plastic geogrid (31), the 1st macadam (41), the 2nd steel plastic geogrid (32), the 2nd macadam (32) and topsoil (50) in turn;
Drainage system (70) and novel bed course are communicated with;
The thickness of the 1st macadam (41) and the 2nd macadam (42) is respectively 20～40cm, and the thickness of topsoil (50) is 20～30cm.
2. utilize the method for a kind of PVC claimed in claim 1 pipe broken stone pile with holes soft ground treatment, it is characterized in that:
1. vibration sinking tube pore-forming
Adopt the vibrating type pile driver, earth's surface (01) in soft foundation (00) is above squeezed into by vibration, pile driver immersed tube (A) is vertically clamp-oned and sunk to the interior projected depth of soft foundation (00), pile driver immersed tube (A) bottom is placed prefabricated concrete pile tip (60) in advance, with pile driver immersed tube (A), together sink, after vibration sinking tube, formed a cylindrical shape underground hole-forming (02) in soft foundation (00);
PVC pipe with holes (20) 2. is installed
Adopt the elevator wire sling on the vibrating type pile driver, PVC pipe with holes (20) merogenesis that the preprepared external diameter is slightly less than to pile driver immersed tube (A) internal diameter is lowered in pile driver immersed tube (A), between PVC pipe with holes (20), adopt union to carry out effectively connecting fast, the total length of PVC pipe with holes (20) is consistent with designing pile length;
3. the New pipe stone mar of constructing
By the hopper on the vibrating type pile driver, drop into metaling until be filled to earth's surface (01) in PVC pipe with holes (20) in pile driver immersed tube (A), then pile driver immersed tube (A) is slowly extracted, broken stone pile (10) in PVC pipe with holes (20) and pipe thereof is stayed in soft foundation (00), has formed a kind of New pipe stone mar;
4. lay novel bed course
Lay the mattress layer on the top of New pipe stone mar, described novel bed course lays the 1st steel plastic geogrid (31), the 1st macadam (41), the 2nd steel plastic geogrid (32), the 2nd macadam (32) and topsoil (50) from bottom to top successively;
Steel plastic geogrid adopts the steel moulding material, and the thickness of macadam 30 is 20～40cm, and the thickness of topsoil 50 is 20～30cm;
5. construction drainage system (70), be connected with novel bed course.
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| CN2013103800822A CN103437336A (en) | 2013-08-27 | 2013-08-27 | PVC hole-pipe gravel pile and soft foundation processing method thereof |
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| CN2013103800822A CN103437336A (en) | 2013-08-27 | 2013-08-27 | PVC hole-pipe gravel pile and soft foundation processing method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103911983A (en) * | 2014-04-17 | 2014-07-09 | 山东大学 | Tire-gravel drainage pile composite foundation treatment method |
| CN104179166A (en) * | 2014-08-22 | 2014-12-03 | 中国建筑西南勘察设计研究院有限公司 | Rigid pile composite foundation and construction method thereof |
| CN104746507A (en) * | 2015-04-01 | 2015-07-01 | 江苏建院营造有限公司 | Construction waste recycling drainage CFG pile foundation and construction method thereof |
| CN111997037A (en) * | 2020-08-14 | 2020-11-27 | 丁思华 | Drainage consolidation method for implementing soft soil foundation by utilizing natural gravitational potential energy |
| CN111997038A (en) * | 2020-08-24 | 2020-11-27 | 丁思华 | Construction method for implementing deep soft soil reinforcement and replacement treatment under throwing and filling block stone layer |
| CN112227344A (en) * | 2020-10-11 | 2021-01-15 | 福建新华夏建工有限公司 | Soft foundation reinforcement construction method with good reinforcement effect |
| CN113293664A (en) * | 2021-05-21 | 2021-08-24 | 湖南中耀交通工程有限公司 | Large-area weak roadbed reinforcing structure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103911983A (en) * | 2014-04-17 | 2014-07-09 | 山东大学 | Tire-gravel drainage pile composite foundation treatment method |
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| CN104179166A (en) * | 2014-08-22 | 2014-12-03 | 中国建筑西南勘察设计研究院有限公司 | Rigid pile composite foundation and construction method thereof |
| CN104746507A (en) * | 2015-04-01 | 2015-07-01 | 江苏建院营造有限公司 | Construction waste recycling drainage CFG pile foundation and construction method thereof |
| CN111997037A (en) * | 2020-08-14 | 2020-11-27 | 丁思华 | Drainage consolidation method for implementing soft soil foundation by utilizing natural gravitational potential energy |
| CN111997038A (en) * | 2020-08-24 | 2020-11-27 | 丁思华 | Construction method for implementing deep soft soil reinforcement and replacement treatment under throwing and filling block stone layer |
| CN112227344A (en) * | 2020-10-11 | 2021-01-15 | 福建新华夏建工有限公司 | Soft foundation reinforcement construction method with good reinforcement effect |
| CN113293664A (en) * | 2021-05-21 | 2021-08-24 | 湖南中耀交通工程有限公司 | Large-area weak roadbed reinforcing structure |
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Application publication date: 20131211 |