CN201411688Y - Reinforcing thick coating deep-burying soft-soil reducing plastic sleeve composite pile - Google Patents
Reinforcing thick coating deep-burying soft-soil reducing plastic sleeve composite pile Download PDFInfo
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- CN201411688Y CN201411688Y CN2009200367941U CN200920036794U CN201411688Y CN 201411688 Y CN201411688 Y CN 201411688Y CN 2009200367941 U CN2009200367941 U CN 2009200367941U CN 200920036794 U CN200920036794 U CN 200920036794U CN 201411688 Y CN201411688 Y CN 201411688Y
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Abstract
The utility model relates to a reinforcing thick coating deep-burying soft-soil reducing plastic sleeve composite pile. The upper part of a pile body is a small-diameter plastic sleeve, the lower partis a large-diameter plastic sleeve, and the reducing part is connected with a reducing plastic sleeve joint; the lower end of the large-diameter sleeve is connected with a pile point; the outer wallof the sleeve is provided with a hole and the surround is wrapped with geotextile; and the small-diameter sleeve is filled with granular material, and the large diameter sleeve is filled with the granular material and is injected with seriflux to form the slurry fixing granular material pile body, and a seriflux diffusion area is formed on the periphery of the pile body. The upper part of the pilebody of the composite pile is arranged in a hard thick-covering layer and is made of granular pile; and the lower part of the pile body is arranged in a deep-bury soft-soil layer, so a rigid pile isadopted. The pile has the advantages of reasonable structure, being economic and practical, improving the performance of the soil properties around the pile, and improving the bearing capacity of thepile body. The utility model is a reasonable and economic pile for reinforcing and processing thick covering layer deep-bury soft-soil foundation.
Description
Technical field
The utility model relates to a kind of stake type of soft soil foundation, particularly a kind of variable diameter plastic sleeve mixed pile of reinforcing thick-covering and deep-burying soft soil layer.
Background technology
In subgrade construction; run into top through regular meeting and have thick-covering (more than 5～10m), the bottom is the ground of buried bury; such as two sides, the Qiantang River, Zhejiang towards the marine plain district (Hangzhou Wan south bank; areas such as Xiaoshan, Shaoxing, Yuyao are more common); table portion is generally silt, flour sand layer; thickness is generally greater than 10m, and it is the weak soil layer down.Wherein upper cover layer sometimes for geological conditions compare better, closely knit flour sand, sand, silt, clay etc., does not generally need special processing; Though but sometimes be silt, compressibilty is still bigger, typically the thick-layer powder soil horizon that distributes as two sides, the Qiantang River, be the Holocene series deposition, part is modern ground or the accumulation of human embankment, and top layer part soil body natural void ratio is big, the standard blow number is low, and is loosely organized, and Ip is between 7～10.In addition, if top sand or flour sand layer are easy liquefied foundation, when seismic design, need resist liquefaction to handle.The bottom is buried bury: mud or mucky soil, and thickness is big, and intensity is low, bad hydraulic permeability.This thick-covering and deep-burying soft soil ground generally need carry out ground and handle in the higher location of banketing, if do not handle, will have the sedimentation and deformation of long period, has settlement after construction distortion in various degree.This ground is if (when surpassing 10～15m), near the higher highway section of banketing the end of the bridge works also should adopt rigid pile to handle to deep-burying soft soil thickness greatly.This is because the bottom weak soil is partly big by the general poor processing effect of draining precompressed, secondary consolidation, is difficult to satisfy the settlement after construction requirement; Though and employing pellet stake mode has vibration preferably fine and close good with acceleration discharging consolidation action effect to upper cover layer, bottom weak soil intensity is low, pile quality can't guarantee, drainage path is long, does not generally also adopt; The cement mixing pile Scheme of Strengthening is handled the degree of depth on the one hand and is not reached requirement, and the more closely knit soil layer difficulty of construction in top is very big, generally also improper.So often needing rigid pile such as pile for prestressed pipe, plastic sleeve concrete pile at last handles.But, rigid pile often expense is very high, under the particularly this situation with thick-covering, soil layer all adopts unified some waste of rigid pile up and down, it is the most reasonable and economical often can not handling or adopt the pellet stake to vibrate that densification and draining precompressed handle for upper cover layer in fact, even adopts band drain to handle to get final product.Certainly, it then is more rational partly adopting rigid pile to handle for the bottom deep-burying soft soil.Therefore according to this situation, if it is reliable to develop a kind of easy construction, it then is very reasonable and economic foundation consolidating technology for this deep-burying soft soil ground that top adopts pellet stake, bottom to adopt the composite pile type technology of rigid pile, and variable diameter plastic sleeve mixed pile is exactly a kind of novel foundation treatment technology at this specific ground exploitation.
Summary of the invention
The purpose of this utility model just is to provide a kind of variable diameter plastic sleeve mixed pile of reinforcing thick-covering and deep-burying soft soil layer.
The technical solution of the utility model:
A kind of reinforcing thick-covering and deep-burying soft soil variable diameter plastic sleeve mixed pile, it is characterized in that pile body top is minor diameter plastic bushing 2, the bottom is a major diameter plastic bushing 4, the reducing place connects with variable diameter plastic sleeve joint 3, the lower end of major diameter plastic bushing 4 is inserted in the sleeve pipe socket 10 and is fixedlyed connected with stake point 9, be furnished with perforate 5 on the tube wall of minor diameter plastic bushing 2 and major diameter plastic bushing 4, plastic bushing peripheral wrapping geotextiles or filter cloth 6, insert pellet 1 in the minor diameter plastic bushing 2, insert pellet 1 in the major diameter plastic bushing 4 and inject slurries, forming the solid pellet pile body 7 of slurry, is all slurries of stake diffusion region 8 in the pile body periphery.
Above-mentioned stake point 9 is to enlarge the conical stake point of precast concrete, and central authorities are provided with the sleeve pipe socket 10 of PVC material, are with a recessed annulus outside it, perhaps are designed to the platform 11 of step.
Above-mentioned geotextiles or filter cloth 6, perhaps determining deviation is wrapped in plastic bushing perforate 5 places.
Above-mentioned pellet 1 is rubble, gravel, flyash, building crushed stone, building waste and slag.
The piling method of the variable diameter plastic sleeve mixed pile of thick-covering and deep-burying soft soil layer is:
(1) with particular manufacturing craft precast concrete pile point 9, this point is conical;
(2) verify the thick-covering I degree of depth in detail by the static sounding in-situ testing method, the deep-burying soft soil layer II degree of depth before setting;
(3) come designing pile length arrange in pairs or groups large and small diameter plastic bushing 4 and 2 according to the thick-covering I degree of depth and the deep-burying soft soil layer II degree of depth, and adopt variable diameter plastic sleeve joint 3 to connect;
(4) prepare slightly to be longer than the variable diameter plastic sleeve of designing pile length, and the plastic sheath tube wall is according to designing requirement perforate 5 at a certain distance, the sleeve pipe periphery with geotextiles or filter cloth 6 parcels firmly;
(5) lower end of the major diameter plastic bushing 4 with holes of peripheral outsourcing geotextiles or filter cloth 6 is inserted in the sleeve pipe socket 10 is connected the hemi-closure space of formation upper opening with precast pile tip 9;
(6) lifting sets machine immersed tube mouth, and the large and small diameter plastic bushing 4 and 2 that will connect stake point 9 with rope inserts in the immersed tube;
(7) open and to set machine, the align piles position sets plastic bushing to the design stake dark, pulls out immersed tube on then, large and small plastic bushing 4 and 2 and stake point 9 stay in the ground;
(8) Grouting Pipe under, and in the major diameter plastic bushing 4 of deep-burying soft soil layer II part, throw in pellet 1;
(9) in major diameter plastic bushing 4, carry out after slip casting to deep-burying soft soil layer II top (being that thick-covering is low) have slurries to emerge, begin to pull out Grouting Pipe, limit tube drawing marginal not slurry, and the top mends and to fill out pellet, and pellets 1 form the solid pellet pile body 7 of slurry by slurry infiltration in the deep-burying soft soil layer II part major diameter plastic bushing 4;
(10) pellet 1 in the input thick-covering I part minor diameter plastic bushing 2, not slip casting forms vertical drainage body.
(11) pile spacing by design sets the variable diameter plastic sleeve mixed pile group with the same method of above-mentioned (1)-(10) step, thereby the ground of top thick-covering, bottom deep-burying soft soil layer structure is carried out consolidation process.
All single wall PVC plastic bushings of screw thread inside and outside the utility model pile body can adopt, or other plastic bushings, the shell material cheapness, and certain flexibility can be arranged, therefore can insert easily to set in the machine immersed tube and set, can satisfy earlier plastic bushing is all set the operations such as carrying out lapidation slip casting again that finishes, improve efficiency of construction, save construction costs.Simultaneously, use single wall screw plastic casing, the gluing of slip casting and pellet forms in the sleeve pipe glued pile body and sleeve pipe interlock are tight, have strengthened the contact friction force of stake with the soil body, have improved the bearing capacity of stake, have given full play to the effect of casing threads.
Also can not wash geotextiles or filter cloth during slip casting open to the pile peripheral earth osmotic grouting, and take certain pressure slip casting to make to be wrapped in the geotextiles or the filter cloth in hole week to expand to the pile body outer process, be similar to " Bottle gourd pile " of sugarcoated haws along the microscler forming shape of stake, the contact action that this has strengthened between stake soil equally improves load-carrying properties.
The utility model adopts precast concrete to enlarge the stake point, and the stake point can adopt various ways (taper shape, cross etc.), can select for use by design according to different actual conditions.Default and the close-connected sleeve pipe socket of plastic bushing in the stake point.
The utility model with plastic bushing set finish after, lay Grouting Pipe and throw in granule grouting, after slip casting adopts weak soil layer top (being that thick-covering is low) to have slurries to emerge, begin to pull out Grouting Pipe, the method of the limit even slip casting in tube drawing limit, pipe-pulling speed is controlled according to grouting amount, and can be uninterrupted continuously, but also multiple mode and combination such as determining deviation slip casting.In the process of slip casting because the vibration of Grouting Pipe can cause the aperture building stones to sink, constantly feed supplement and recharge operation in the slip casting process, Grouting Pipe can repeat recycling.
To top have thick-covering (more than 5～10m), the bottom is the ground of buried bury, the top thick-covering is generally good water permeability, reinforces the lower soil layer of requirement, adopt the stake of plastic bushing pellet to handle: by the vibration densification of work progress, and the raising soil strength is handled in the back as the prepressing water discharge body as excellent drainage channel; Bottom mud equal strength is low, the demanding weak soil layer of reinforcing adopts plastic bushing granule grouting pile (or concrete pile) rigid pile composite foundation technology to handle; Covering layer soil strength itself is higher relatively and progressively improve in draining precompressed process, the different distortion of distortion bottom pile body and inter-pile soil can well be regulated and adapt to thicker like this covering layer (generally greater than more than the 5m) voluntarily, can form native arching action, be to form between top roadbed and the bottom rigid pile composite foundation a well distortion transition zone, make that the top differential settlement reduces, the deadline is fast.
Technical characterstic is:
(1) reduces construction costs.Compare with the long rigid pile of full stake, the pellet stake of minor diameter has been adopted on top, can satisfy the reinforcing requirement equally, but expense can reduce greatly.
(2) top is the plastic bushing pellet stake of minor diameter, it or not rigid pile, and following rigid pile is because diameter is bigger than top, slip casting enlarges the pile body effect in addition, top exists thick-covering, can regulate and adapt to distortion voluntarily, does not need to be provided with cover plate or pile cover, therefore long with adopting full stake rigid pile is compared, and is also saving construction costs in addition on the one hand in a large number.
(3) the bottom pile body has absorbed plastic bushing pellet stake (TGG stake) pile depth controlled, can not vibrate the soil compaction broken pile, pile side friction height, inter-pile soil intensity recover advantage such as fast, that soil compaction effect is little.
(4) after the plastic bushing of outsourcing geotechnique filter cloth was adopted on top, more reliable than general pellet stake pile quality, drainage effect was good.
Two kinds of stake types mix use, promptly adopt different stake types to come directed the reinforcing at the different soil bodys, finish but once construct, and have both satisfied to reinforce requiring also to have reduced construction costs.
The utility model has These characteristics simultaneously, thereby significantly improves load-carrying properties and pile quality, effectively consolidation process thick-covering and deep-burying soft soil layer ground.
Description of drawings
Fig. 1---variable diameter plastic sleeve mixed pile structural representation
Fig. 2---the structural representation of the concrete precast pile point of band groove;
Fig. 3---the structural representation of step-like concrete precast pile point.
Among the figure: hole, 6-geotextiles or the filter cloth on 1-pellet, 2-minor diameter plastic bushing, 3-variable diameter plastic sleeve joint, 4-major diameter plastic bushing, the 5-plastic bushing, the solid pellet pile body of 7-slurry, all slurries of 8-stake diffusion region, 9-precast pile tip, 10-sleeve pipe socket, 11-spill annulus, 12-step platform, I-thick-covering, II-deep-burying soft soil layer, III-hardpan or relative hardpan.
The specific embodiment
As Fig. 1, make prefabricated expansion stake point 9 with the sharp mould 4 of the special stake of developing; According to thick-covering I, deep-burying soft soil layer II, hardpan or the distribution situation of hardpan III relatively, be ready to screw plastic casing 2,4, sleeve pipe the 2, the 4th, by designing requirement along pile body perforate at a certain distance; Sleeve pipe 2,4 is connected firmly with variable diameter plastic sleeve joint 3 and glue by designing pile length, when if sleeve pipe 2,4 needs to take over separately, adopt the special joint of correspondingly-sized to connect, wrap up with geotextiles or filter cloth 3 at the side-wall hole place, the plastic bushing of slightly being longer than designing pile length that will connect then is connected closely with prefabricated concrete stake point 9, forms the hemi-closure space of upper opening; Lifting sets the machine immersed tube to certain altitude, and the plastic bushing that connects the stake point is inserted in the immersed tube, and unlatching sets machine align piles position and sets to projected depth; Promote immersed tube, plastic bushing is then stayed in the ground; Following Grouting Pipe is also thrown in pellet in plastic bushing; Open grouting equipment, after slip casting has slurries to emerge to weak soil layer top (being that thick-covering is low), begin to pull out Grouting Pipe, limit tube drawing marginal not slurry, and mend to fill out and recharge, under certain grouting pressure effect, prose style free from parallelism material in the plastic bushing 4 forms the solid pellet pile body 7 of slurry, the geotextiles 3 that is wrapped in 4 hole weeks of plastic bushing is washed open, and slurries form slurries diffusion region 8 to the pile peripheral earth infiltration, effectively all soil nature matter of improvement stake; Perhaps grouting pressure is not washed geotextiles 3 open, and under pressure, geotextiles 3 is outwards outstanding to expand, and forms the cucurbit pile body of similar compass shape, can improve the native contact performance of stake equally.
Principle of the present utility model and technology also can be applicable to other Measures for Making Ground and Foundation.
Claims (4)
1. reinforcing thick-covering and deep-burying soft soil variable diameter plastic sleeve mixed pile, it is characterized in that pile body top is minor diameter plastic bushing (2), the bottom is major diameter plastic bushing (4), the reducing place connects with variable diameter plastic sleeve joint (3), the lower end of major diameter plastic bushing (4) is inserted in the sleeve pipe socket (10) and is fixedlyed connected with stake point (9), be furnished with perforate (5) on the tube wall of minor diameter plastic bushing (2) and major diameter plastic bushing (4), plastic bushing peripheral wrapping geotextiles or filter cloth (6), insert pellet (1) in the minor diameter plastic bushing (2), insert pellet (1) in the major diameter plastic bushing (4) and inject slurries, forming the solid pellet pile body (7) of slurry, is stake all slurries diffusion regions (8) in the pile body periphery.
2. variable diameter plastic sleeve mixed pile according to claim 1, it is characterized in that described stake point (9) is for enlarging the conical stake point of precast concrete, central authorities are provided with the sleeve pipe socket (10) of PVC material, are with a recessed annulus (11) outside it, perhaps are designed to the platform (12) of step.
3. variable diameter plastic sleeve mixed pile according to claim 1 is characterized in that described geotextiles or filter cloth (6), locates the determining deviation parcel in plastic bushing perforate (5), perhaps with the peripheral all wrappings of plastic bushing.
4. variable diameter plastic sleeve mixed pile according to claim 1 is characterized in that described pellet (1) is rubble, gravel, flyash, building crushed stone, building waste or slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200367941U CN201411688Y (en) | 2009-02-25 | 2009-02-25 | Reinforcing thick coating deep-burying soft-soil reducing plastic sleeve composite pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200367941U CN201411688Y (en) | 2009-02-25 | 2009-02-25 | Reinforcing thick coating deep-burying soft-soil reducing plastic sleeve composite pile |
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| Publication Number | Publication Date |
|---|---|
| CN201411688Y true CN201411688Y (en) | 2010-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200367941U Expired - Fee Related CN201411688Y (en) | 2009-02-25 | 2009-02-25 | Reinforcing thick coating deep-burying soft-soil reducing plastic sleeve composite pile |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469792A (en) * | 2013-09-09 | 2013-12-25 | 广东省第二建筑工程公司 | Method for conducting grouting construction at back of pile bottom of cast-in-place pile |
| CN103938610A (en) * | 2014-04-21 | 2014-07-23 | 云南省交通规划设计研究院 | Construction pile tube and technology of variable cross-section reinforced gravel pile for reinforcing soft foundation |
| CN109137924A (en) * | 2018-08-07 | 2019-01-04 | 河海大学 | It is a kind of that the long structure and method of deep soft soil stake is reduced by form compound foundation |
| CN115110523A (en) * | 2022-08-04 | 2022-09-27 | 中国水利水电科学研究院 | Grouting repair method for integrity defects of screw pile |
-
2009
- 2009-02-25 CN CN2009200367941U patent/CN201411688Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469792A (en) * | 2013-09-09 | 2013-12-25 | 广东省第二建筑工程公司 | Method for conducting grouting construction at back of pile bottom of cast-in-place pile |
| CN103469792B (en) * | 2013-09-09 | 2015-05-06 | 广东省第二建筑工程公司 | Method for conducting grouting construction at back of pile bottom of cast-in-place pile |
| CN103938610A (en) * | 2014-04-21 | 2014-07-23 | 云南省交通规划设计研究院 | Construction pile tube and technology of variable cross-section reinforced gravel pile for reinforcing soft foundation |
| CN103938610B (en) * | 2014-04-21 | 2016-06-29 | 云南省交通规划设计研究院 | The construction pile pipe of the variable cross-section Reinforced Gravel Pile of a kind of strengthening soft foundation and technique |
| CN109137924A (en) * | 2018-08-07 | 2019-01-04 | 河海大学 | It is a kind of that the long structure and method of deep soft soil stake is reduced by form compound foundation |
| CN115110523A (en) * | 2022-08-04 | 2022-09-27 | 中国水利水电科学研究院 | Grouting repair method for integrity defects of screw pile |
| CN115110523B (en) * | 2022-08-04 | 2024-05-17 | 中国水利水电科学研究院 | Screw pile integrity defect grouting repairing method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100224 Termination date: 20130225 |