CN202148522U - Soft soil foundation long concrete short gravel (LCSG) pile and vacuum preloading joint treatment device - Google Patents
Soft soil foundation long concrete short gravel (LCSG) pile and vacuum preloading joint treatment device Download PDFInfo
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- CN202148522U CN202148522U CN201120231629U CN201120231629U CN202148522U CN 202148522 U CN202148522 U CN 202148522U CN 201120231629 U CN201120231629 U CN 201120231629U CN 201120231629 U CN201120231629 U CN 201120231629U CN 202148522 U CN202148522 U CN 202148522U
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Abstract
The utility model discloses a soft soil foundation long concrete short gravel (LCSG) pile and vacuum preloading joint treatment device, which comprises a LCSG pile, a horizontal cushion layer and a vacuum preloading system. The LCSG pile is composed of a long concrete pile core and a short gravel pile sleeve, and the pile core and the gravel pile sleeve are formed together in pouring mode. The length of the gravel pile sleeve is one second to two thirds of the length of the concrete pile core. The horizontal cushion layer is composed of medium sand and coarse sand. A vacuum pressurization system comprises a vacuum pump, a preloading pipeline, a sealing device and the like. Other vertical drainage channels and vacuum pressing pipelines are no longer arranged in the system independently, and parts of functions are achieved by the gravel pile sleeve of the LCSG pile. The soft soil foundation LCSG pile and vacuum preloading joint treatment device has the functions of controlling total sedimentation, reducing lateral direction deformation, avoiding foundation soil liquefaction and removing foundation shearing and damage which are caused by loading and the like. The soft soil foundation LCSG pile and vacuum preloading joint treatment device is simple and capable of reducing cost and reasonably shortening construction period.
Description
Technical field:
The utility model belongs to the Soft Ground field, relates to compound broken stone pile of the long core concrete of a kind of soft foundation (Long-Concrete Short-Gravel stake is hereinafter to be referred as " LCSG stake ") and vacuum pre-pressed joint treating apparatus.
Background technology:
At present, structure such as the increasing highrise building in coastal area, speedway, airport, harbour, factory building, warehouse, oil pipe are built on deep soft foundation.The upper load that this type structure bear is very big, and very responsive to sedimentation.Coastal soft foundation has usually that moisture content is big, void ratio is big, at the bottom of the intensity, consolidation rate waits characteristics slowly; What have then is easy to generate liquefaction under dynamic load function, the forfeiture supporting capacity.After top structure construction finished, soft foundation had one usually and lasted 3 to 5 years even vertical sedimentation and lateral deformation process for more time, and the use that this will have a strong impact on the top structure is necessary natural soft soil foundation is carried out consolidation process.
The large tracts of land reinforcing soft ground adopts preloading and vacuum method usually, and these two kinds of methods all can make foundation strength improve and fulfil certain settling amount ahead of schedule.Preloading is before structure are built use, and filling out the preloading material through interim heap increases soil body total stress, and then ground is applied precompressed; But it needs preloading materials such as a large amount of soil bodys, piece stone, and is causing foundation instability producing bigger lateral deformation near place, the face of land easily, in the applying of actual engineering, has received certain restriction.Vacuum method is through vacuumizing, and under the constant situation of soil body total stress, reduces pore water pressure, increases soil body effective stress, and inner external pressure difference produces the precompressed effect, and the pore water in the soil is discharged; But generally about 80kPa, the precompressed effect is less than normal for its precompression, and the duration is longer, can not satisfy the instructions for use of top structure.No matter be piling prepressing or vacuum preloading, they all are limited to the raising of soft foundation bearing capacity, can't satisfy the requirement of big load in top or special function of use under a lot of situation.
The utility model content:
For remedying the deficiency of traditional vacuum prepressing ground foundation treatment method; The purpose of the utility model provides a kind of soft foundation LCSG stake and vacuum pre-pressed joint treating apparatus; It is characterized in that: comprise the pile foundation layer of being made up of some LCSG stakes, described LCSG stake comprises the concrete pile core, and is arranged at the peripheral rubble pile protection of concrete pile core; Horizontal bed course is arranged at the top of pile foundation layer, and the vacuum preloading system is arranged at the top of horizontal bed course.
Further:
Described LCSG stake, the length of concrete pile core is greater than the length of rubble pile protection.
The diameter of concrete pile core is that 0.4m, length are 20.0m, and the diameter of rubble pile protection is that 0.5m, length are 12m, and the spacing between the LCSG stake is 2.5m.
The diameter of concrete pile core is that 0.6m, length are 30.0m, and the diameter of rubble pile protection is that 0.8m, length are 20m, and the spacing of LCSG stake is 3.0m.
Described horizontal bed course adopts medium sand or coarse sand, and horizontal cushion thickness is 0.3～0.5m, in whole ground scope, lays.
The vacuum preloading system comprises vacuum preloading pipeline and obturator, vacuum pump, and vacuum preloading pipeline and obturator are layed in the top of horizontal bed course, and vacuum pump links to each other with the vacuum preloading pipeline.
Described vacuum preloading pipeline adopts outsourcing 90g/m
2The chimney filter of non-woven geotextile, described obturator adopts factory's heat seal one-shot forming caulking gum film or PVC diaphragm seal.
Described vacuum pump adopts jet vacuum pump, and every jet vacuum pump control area is 800m
2, vacuum reached more than 80 kPa in lasting 10 days under diaphragm seal.
The beneficial effect of the utility model is: the LCSG pile body of the utility model has the distortion of carrying, limit lateral, vertical reinforcement, prevent the effect of liquefying; Simultaneously foundation soil there is compacted effect; The vertical pressurization passageway of its rubble pile protection double as vacuum preloading has reduced the vertical drainage body construction sequence of traditional vacuum precompressed; Horizontal bed course mainly has top layer vacuum pressure and the effect of adjustment stake with the inter-pile soil stress distribution of transmitting; Vacuum preloading mainly has preconsolidation, acceleration draining, reduces the effect of settlement after construction.The utlity model has the control total settlement, reduce lateral deformation, prevent to liquefy, eliminate the effects such as ground shear failure that quick loading causes; Equipment is simple, reduce cost and can reasonably shorten the construction period.
Description of drawings:
Fig. 1 is the sketch map of LCSG stake of the utility model soft foundation and vacuum pre-pressed joint treating apparatus.
Among the figure: the 1st, the concrete pile core; The 2nd, the rubble pile protection; 1 and 2 common formation LCSG stakes; The 3rd, horizontal bed course; The 4th, vacuum preloading pipeline and obturator; The 5th, vacuum pump.
The specific embodiment:
Embodiment 1:
As shown in Figure 1, Fig. 1 is a kind of soft foundation LCSG stake and the piling prepressing united treating apparatus of present embodiment, and described combined apparatus comprises:
The pile foundation layer; The pile foundation layer comprises some LCSG stakes; Every LCSG stake comprises the concrete pile core 1 that is formed by cylindrical concrete spouting; With the rubble pile protection 2 that concrete pile core 1 is cast in, concrete pile core 1 is formed the LCSG stake with rubble pile protection 2, and the length of concrete pile core 1 is greater than the length of rubble pile protection 2; The diameter of the concrete pile core 1 of LCSG stake in the present embodiment is that 0.4m, length are 20.0m, and the diameter of rubble pile protection 2 is that 0.5m, length are 12m, and the spacing between the LCSG stake is 2.5m.
The vacuum preloading system comprises precompressed pipeline and obturator 4, vacuum pump 5; Vacuum preloading pipeline and obturator 4 adopt outsourcing 90g/m respectively
2The chimney filter of non-woven geotextile and at factory's heat seal one-shot forming caulking gum film; Vacuum pump 5 adopts jet vacuum pump, and every control area is 800m
2, vacuum reached more than 80 kPa in lasting 10 days under diaphragm seal.
The soft foundation LCSG stake of present embodiment and vacuum pre-pressed joint processing method comprise the steps:
1, lays horizontal bed course 3 on the soft foundation surface;
2, set broken stone pile to its design elevation through immersed tunnelling method;
3, through immersed tunnelling method in position (step 2 piling place) set concrete pile core 1 to its design elevation, the rubble pile body that simultaneously sets step 2 is extruded into the annular pile protection 2 that is looped around around concrete pile core 1 top, forms LCSG stake (1+2);
4, different places set the LCSG stake successively according to design attitude in the place;
5, on the ground of accomplishing fluently the LCSG stake, lay vacuum preloading pipeline and obturator 4;
6, carry out vacuum preloading through vacuum pump 5 and load, prepressing water discharge is accomplished ground treatment construction and is done to designing requirement.
This processing method has the control total settlement, reduces lateral deformation, prevents to liquefy, eliminate the effects such as ground shear failure that quick loading causes; Equipment is simple, reduce cost, and can will shorten about 1/3 the duration.
Embodiment 2:
A kind of soft foundation LCSG stake of present embodiment and piling prepressing united treating apparatus and method are with embodiment 1; Difference is: the diameter of the concrete pile core 1 of LCSG stake in the present embodiment is that 0.6m, length are 30.0m; The diameter of rubble pile protection 2 is that 0.8m, length are 20m, and the spacing of LCSG stake is 3.0m; Horizontal bed course 3 adopts medium sand, and horizontal cushion thickness 0.5m lays in whole ground scope; Vacuum preloading pipeline and the airtight facility precompressed 4 employing outsourcing 90g/m of system thereof
2The chimney filter of non-woven geotextile and PVC diaphragm seal; Vacuum pump 5 adopts jet vacuum pump, and every control area is made as 800m
2Require under the diaphragm seal vacuum to continue to reach more than 80 kPa in 10 days simultaneously.
The utlity model has the control total settlement, reduce lateral deformation, prevent to liquefy, eliminate the effects such as ground shear failure that quick loading causes; Equipment is simple, reduce cost, and can will shorten about 1/3 the duration.
Claims (8)
1. soft foundation LCSG stake and vacuum pre-pressed joint treating apparatus; It is characterized in that: comprise the pile foundation layer of forming by some LCSG stakes; Described LCSG stake comprises the concrete pile core; And be arranged at the peripheral rubble pile protection of concrete pile core, and horizontal bed course is arranged at the top of pile foundation layer, and the vacuum preloading system is arranged at the top of horizontal bed course.
2. a kind of soft foundation LCSG according to claim 1 stake and vacuum pre-pressed joint treating apparatus is characterized in that: described LCSG stake, the length of concrete pile core is greater than the length of rubble pile protection.
3. a kind of soft foundation LCSG according to claim 1 stake and vacuum pre-pressed joint treating apparatus; It is characterized in that: described LCSG stake; The diameter of concrete pile core is that 0.4m, length are 20.0m, and the diameter of rubble pile protection is that 0.5m, length are 12m, and the spacing between the LCSG stake is 2.5m.
4. a kind of soft foundation LCSG according to claim 1 stake and vacuum pre-pressed joint treating apparatus; It is characterized in that: described LCSG stake; The diameter of concrete pile core is that 0.6m, length are 30.0m, and the diameter of rubble pile protection is that 0.8m, length are 20m, and the spacing of LCSG stake is 3.0m.
5. a kind of soft foundation LCSG according to claim 1 stake and vacuum pre-pressed joint treating apparatus is characterized in that: described horizontal bed course adopts medium sand or coarse sand, and horizontal cushion thickness is 0.3～0.5m.
6. a kind of soft foundation LCSG according to claim 1 stake and vacuum pre-pressed joint treating apparatus; It is characterized in that: described vacuum preloading system comprises vacuum preloading pipeline and obturator, vacuum pump; Vacuum preloading pipeline and obturator are layed in the top of horizontal bed course, and vacuum pump links to each other with the vacuum preloading pipeline.
7. a kind of soft foundation LCSG according to claim 6 stake and vacuum pre-pressed joint treating apparatus is characterized in that: described vacuum preloading pipeline adopts outsourcing 90g/m
2The chimney filter of non-woven geotextile, described obturator adopts rubber sealing film or PVC diaphragm seal.
8. a kind of soft foundation LCSG according to claim 6 stake and vacuum pre-pressed joint treating apparatus is characterized in that: described vacuum pump adopts jet vacuum pump, and every jet vacuum pump control area is 800m
2, vacuum reached more than 80 kPa in lasting 10 days under diaphragm seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120231629U CN202148522U (en) | 2011-07-04 | 2011-07-04 | Soft soil foundation long concrete short gravel (LCSG) pile and vacuum preloading joint treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120231629U CN202148522U (en) | 2011-07-04 | 2011-07-04 | Soft soil foundation long concrete short gravel (LCSG) pile and vacuum preloading joint treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202148522U true CN202148522U (en) | 2012-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120231629U Expired - Fee Related CN202148522U (en) | 2011-07-04 | 2011-07-04 | Soft soil foundation long concrete short gravel (LCSG) pile and vacuum preloading joint treatment device |
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| Country | Link |
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| CN (1) | CN202148522U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102304913A (en) * | 2011-07-04 | 2012-01-04 | 绍兴文理学院 | LCSG (Long-Concrete Short-Gravel) pile and vacuum prepressing combined processing method and device for soft soil foundation |
| CN103628467A (en) * | 2013-12-24 | 2014-03-12 | 山东大学 | Foundation treatment method based on dynamic accurate control on nonuniform settlement |
-
2011
- 2011-07-04 CN CN201120231629U patent/CN202148522U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102304913A (en) * | 2011-07-04 | 2012-01-04 | 绍兴文理学院 | LCSG (Long-Concrete Short-Gravel) pile and vacuum prepressing combined processing method and device for soft soil foundation |
| CN103628467A (en) * | 2013-12-24 | 2014-03-12 | 山东大学 | Foundation treatment method based on dynamic accurate control on nonuniform settlement |
| CN103628467B (en) * | 2013-12-24 | 2015-10-28 | 山东大学 | Based on the method for processing foundation that differential settlement dynamically accurately controls |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120222 Termination date: 20140704 |
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| EXPY | Termination of patent right or utility model |