CN204059332U - A kind of concrete precast pipe pile and piling prepressing Soft Ground device - Google Patents

A kind of concrete precast pipe pile and piling prepressing Soft Ground device Download PDF

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Publication number
CN204059332U
CN204059332U CN201420287212.8U CN201420287212U CN204059332U CN 204059332 U CN204059332 U CN 204059332U CN 201420287212 U CN201420287212 U CN 201420287212U CN 204059332 U CN204059332 U CN 204059332U
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China
Prior art keywords
pile
pipe pile
phc
layer
concrete precast
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Expired - Fee Related
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CN201420287212.8U
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Chinese (zh)
Inventor
李誉
汪巍
蒋兴华
黄颐
宴鸿新
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QINGDAO COAST DEFENCE ENGINEERING BUREAU
HAINAN TONGCHENG BUILDING ENGINEERING Co Ltd
Original Assignee
QINGDAO COAST DEFENCE ENGINEERING BUREAU
HAINAN TONGCHENG BUILDING ENGINEERING Co Ltd
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Priority to CN201420287212.8U priority Critical patent/CN204059332U/en
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Publication of CN204059332U publication Critical patent/CN204059332U/en
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Abstract

The utility model provides a kind of concrete precast pipe pile and piling prepressing Soft Ground device, comprises the pile foundation layer, leveling course, geotextiles, horizontal mattress layer, precompressed heap carrier layer and the gutter that are made up of some PHC-SG stakes; PHC-SG stake comprises PHC pipe pile core, and is arranged at the rubble pile protection of described PHC pipe pile core periphery; Described leveling course is arranged at above described pile foundation layer, and described geotextiles is arranged at above described leveling course; Described horizontal mattress layer is arranged at above described geotextiles, and described precompressed heap carrier layer is arranged at above described horizontal mattress layer; Described gutter is arranged at below described geotextiles, and the position relative with described geotextiles is provided with at least two through holes.The utility model set Vertical Settlement of concrete long stake and compacted, the drainage of lateral deformation control and rubble stub, thus improve foundation strength, reduce the settling amount after being completed; There is the acceleration consolidation of preloading simultaneously, effectively reduce the duration.

Description

A kind of concrete precast pipe pile and piling prepressing Soft Ground device
Technical field
The utility model belongs to Soft Ground field, particularly relate to a kind of concrete precast pipe pile (Prestressed High-intensity Concrete Short-Gravel stake, hereinafter referred to as " PHC-SG stake ") and piling prepressing Soft Ground device.
Background technology
Along with the development of China's infrastructure, the structure such as the increasing highrise building in coastal area, urban operating mechanism, speedway are built on deep soft foundation.These soft foundations have the features such as moisture content is large, void ratio is large, intensity is low, consolidation rate is slow usually; usually larger Vertical Settlement and lateral deformation can be produced after the construction of top structure; and this sedimentation and deformation process maintains the longer time, usually the longer time is needed to terminate.Sedimentation and deformation process will have a strong impact on inherently safe and the result of use thereof of the structure built thereon so for a long time, be necessary to carry out consolidation process to it.
The method of reinforced soft soil ground process mainly contains three classes.The first kind reduces sedimentation, namely carries out replacement Treatment to weak soil, replaces natural weak soil, as dirt displacement method with harder soil or constructional materials.Equations of The Second Kind is Accelerated subsidence method, and namely before building structure, make the sedimentation of soft foundation fulfil a part ahead of schedule by engineering means or its settling rate is accelerated, fast and stable, as preloading.3rd class, between the first kind and Equations of The Second Kind, has the effect reducing sedimentation and Accelerated subsidence, as broken stone pile method simultaneously.For the ground with deep soft soil, all there is certain defect in above-mentioned three class methods.As dirt displacement method needs a large amount of replacing materials, this just determines can not, also need not replace deep soft soil foundation; The preconsolidation time required for preloading is long, by the increase of the lengthening and engineering cost that cause the duration, may cause the shear failure of ground; The settling amount that broken stone pile method reduces is limited and usually producing larger lateral deformation near earth's surface place, affect the monolithic stability of superstructure; PHC pile tube can be used as the engineering pile of superstructure, directly bears the whole load of superstructure.
Utility model content
The purpose of this utility model is to provide a kind of concrete precast pipe pile and piling prepressing Soft Ground device, to solve the problem of prior art.
The utility model realizes like this, a kind of concrete precast pipe pile and piling prepressing Soft Ground device, is characterized in that: comprise the pile foundation layer, leveling course, geotextiles, horizontal mattress layer, precompressed heap carrier layer and the gutter that are made up of some PHC-SG stakes;
Described PHC-SG stake comprises PHC pipe pile core, and is arranged at the rubble pile protection of PHC pipe pile core periphery;
Described leveling course is arranged at above described pile foundation layer, and described geotextiles is arranged at above described leveling course;
Described horizontal mattress layer is arranged at above described geotextiles, and described precompressed heap carrier layer is arranged at above described horizontal mattress layer;
Described gutter is arranged at below described geotextiles, and the position relative with described geotextiles is provided with at least two through holes.
Preferably:
Described gutter adopts polyvinyl-chloride drainage pipe.
Described gutter diameter is 300 millimeters, and the upper semi-circle that described gutter is relative with described geotextiles arranges the through hole of 10 millimeters at interval of 100 millimeters.
Further:
Described PHC pipe pile core is poured into by cylindrical concrete and forms.
The length of described rubble pile protection is the half of PHC pipe pile core length, and broken stone pile cover is looped around the top of PHC pipe pile core; Rubble pile protection and concrete pile core form PHC-SG stake.
Preferably:
The diameter of PHC pipe pile core is 0.4m, wall thickness 95mm, and enters completely decomposed layer, and the spacing that diameter is about 0.60m, length is 10m, PHC-SG stake of rubble pile protection is 2.5m.
Or the diameter of PHC pipe pile core is 0.5m, wall thickness 100mm, and length is 30.0m, the spacing that diameter is about 0.8m, length is 15m, PHC-SG stake of rubble pile protection 2 is 3.5m.
Described horizontal mattress layer is the compound of rubble, coarse sand or rubble and coarse sand, and preferably, horizontal mattress layer adopts grating continuous print rubble, and the thickness of horizontal mattress layer is 0.5m ~ 0.6m, lays within the scope of whole ground.
Described precompressed heap carrier layer is soil, building stones or compound that is native and building stones.
Preferably:
Precompressed heap carrier layer is clay, and the height of precompressed heap carrier layer is 4.0m, and point two-stage applies, every grade of preloading height 2.0m.
Precompressed heap carrier layer is silt and block stone compound, and the height of precompressed heap carrier layer is 5.4m, point three grades of applyings, every grade of preloading height 1.8m.
In the utility model, PHC-SG pile body has the effect of carrying, limit lateral distortion, vertical drainage consolidation, has crowd in-out effects to foundation soil simultaneously; Mattress layer mainly has the effect providing follow-up work-yard, horizontal drainage and adjustment stake and inter-pile soil stress distribution, forms vertical, the horizontal drainage channel that intersects together with rubble pile protection; The effect that preloading mainly has preconsolidation, accelerates draining, reduces settlement after construction; Further, the water that the gutter arranged below geotextiles is mainly used to be arranged on earth's surface flows into gutter by the through hole on gutter, and is discharged by the outlet at gutter two ends, makes soft soil consolidation.The utility model not only can control Vertical Settlement, but also can limit lateral displacement, the consolidation settlement that can also provide vertical and horizontal drainage channel simultaneously, accelerate soft foundation, the using function of the structure such as highrise building, urban operating mechanism, speedway, reasonably construction period can be guaranteed and reduce engineering cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment PHC-SG stake and piling prepressing Soft Ground device;
The gutter cross-sectional structure schematic diagram that Fig. 2 provides for the utility model embodiment;
The disc top view that the gutter that Fig. 3 provides for the utility model embodiment is relative with geotextiles.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, Fig. 1 is a kind of PHC-SG stake and the piling prepressing Soft Ground device of the present embodiment, and described Soft Ground device comprises three parts:
Part I is by PHC pipe pile core 1, and rubble pile protection 2 is arranged at the periphery of PHC pipe pile core 1, and in the present embodiment, the length of PHC pipe pile core 1 is greater than the length of rubble pile protection 2, and rubble pile protection 2 is looped around the top of PHC pipe pile core 1; Rubble pile protection 2 and concrete pile core 1 form PHC-SG stake.The length of rubble pile protection 2 is determined according to the relative depth of soft foundation, is preferably the half of PHC pipe pile core 1 length.The PHC pipe pile core 1 of PHC-SG stake in the present embodiment adopts PHC-AB400 (95), then the diameter of described PHC pipe pile core is 0.4m, wall thickness 95mm, and enters completely decomposed layer, the spacing that diameter is about 0.60m, length is 10m, PHC-SG stake of rubble pile protection 2 is 2.5m; It should be noted that, in the utility model, PHC pipe pile core 1 is a kind of prefabricated tubular pile of annular.
Part II is leveling course 5, and leveling course 5 is arranged at the top of PHC-SG stake, and be laid on the earth's surface in PHC-SG stake, described geotextiles is arranged at the top of described leveling course 5 leveling course 5 horizontal homogeneous, and described gutter 6 is arranged at below described geotextiles.
Part III is horizontal mattress layer 3, and horizontal mattress layer 3 is the compound of rubble, coarse sand or rubble and coarse sand.
In the present embodiment, horizontal mattress layer 3 adopts grating continuous print rubble, and the thickness of horizontal mattress layer 3 is 0.5m, lays within the scope of whole ground;
Part IV is precompressed heap carrier layer 4, precompressed heap carrier layer 4 is arranged at the top of horizontal mattress layer 3, precompressed heap carrier layer 4 is soil, building stones or compound that is native and building stones, and it mainly plays the densification soil body, impels the discharge of water in the soil body and fulfil partial consolidation sedimentation ahead of schedule.In the present embodiment, precompressed heap carrier layer 4 adopts native clay, and the height of precompressed heap carrier layer 4 is 4.0m, and point two-stage applies, every grade of preloading height 2.0m.
The soft foundation PHC-SG stake of the present embodiment and piling prepressing soft-soil foundation treatment method, comprise the steps:
The first step, lays leveling course 5 on earth's surface, described leveling course 5 lays geotextiles, is provided with gutter 6 below described geotextiles;
The effect of described geotextiles is conducive to the moisture that the soil body squeezes out to pass through;
Optionally, described gutter 6 adopts polyvinyl chloride (PVC, Polyvinyl chloride polymer) gutter, optionally, described gutter 6 diameter is 300 millimeters, as shown in Figures 2 and 3, the upper semi-circle that described gutter 6 is relative with described geotextiles arranges the through hole of 10 millimeters at interval of 100 millimeters.
Second step, described geotextiles is laid horizontal mattress layer 3, on the ground laying horizontal mattress layer 3, sets broken stone pile to design elevation by immersed tunnelling method;
Horizontal mattress layer 3 adopts grating continuous print rubble, and horizontal mattress layer 3 thickness 0.5m, lays within the scope of whole ground;
3rd step, by hammering method in position (i.e. step 2 piling place) set PHC concrete precast pipe pile 1 to its design elevation, the rubble pile body that step 2 sets is extruded into the annular encapsulation 2 being looped around PHC concrete precast pile 1 top periphery simultaneously, forms PHC-SG stake (1-2);
4th step, according to designing requirement, at difference place, place, sets PHC-SG stake (1+2) by abovementioned steps according to design attitude successively;
The diameter of the PHC pipe pile core 1 of the PHC-SG stake set is 0.4m, length is 20.0m, and the spacing that diameter is about 0.5m, length is 10m, PHC-SG stake of rubble pile protection 2 is 2.5m.
5th step, horizontal mattress layer 3 is supplied in the PHC-SG stake position set;
6th step, horizontal mattress layer 3 applies precompressed heap carrier layer 4; Precompressed heap carrier layer 4 adopts native clay, and waste height is 4.0m, and a point two-stage applies every grade of preloading height 2.0m.
7th step, after being depressed into design time in advance, shedding precompressed heap carrier layer 4, completes basement process work.
Embodiment 2:
A kind of PHC-SG stake of the present embodiment and piling prepressing Soft Ground device, its structure is with embodiment 1, difference is: the PHC pipe pile core 1 of PHC-SG stake in the present embodiment adopts PHC-AB500 (100), then the diameter of described PHC pipe pile core is 0.5m, wall thickness 100mm, length are 30.0m, the spacing that diameter is about 0.8m, length is 15m, PHC-SG stake of rubble pile protection 2 is 3.5m; Horizontal mattress layer 3 adopts grating continuous print rubble, coarse sand compound, and thickness 0.6m lays within the scope of whole ground; Precompressed heap carrier layer 4 adopts local silt and block stone compound, and waste height is 5.4m, point three grades of applyings, every grade of preloading height 1.8m.
After testing, adopt PHC-SG stake of the present utility model and piling prepressing Soft Ground devices and methods therefor, controlling Vertical Settlement, limit lateral displacement, vertical and horizontal drainage channel be provided, accelerate the consolidation settlement of soft foundation etc. in, there is remarkable engineering effort, the using function of the structure such as highrise building, speedway, reasonably construction period can be guaranteed and reduce engineering cost.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.

Claims (8)

1. concrete precast pipe pile and a piling prepressing Soft Ground device, is characterized in that: comprise the pile foundation layer, leveling course, geotextiles, horizontal mattress layer, precompressed heap carrier layer and the gutter that are made up of some concrete precast pipe piles;
Described concrete precast pipe pile comprises PHC pipe pile core, and is arranged at the rubble pile protection of described PHC pipe pile core periphery;
Described leveling course is arranged at above described pile foundation layer, and described geotextiles is arranged at above described leveling course; Described horizontal mattress layer is arranged at above described geotextiles, and described precompressed heap carrier layer is arranged at above described horizontal mattress layer;
Described gutter is arranged at below described geotextiles, and the position relative with described geotextiles is provided with at least two through holes.
2. a kind of concrete precast pipe pile according to claim 1 and piling prepressing Soft Ground device, is characterized in that: described gutter adopts polyvinyl-chloride drainage pipe.
3. a kind of concrete precast pipe pile according to claim 2 and piling prepressing Soft Ground device, it is characterized in that: described gutter diameter is 300 millimeters, the upper semi-circle that described gutter is relative with described geotextiles arranges the through hole of 10 millimeters at interval of 100 millimeters.
4. a kind of concrete precast pipe pile according to claim 1 and piling prepressing Soft Ground device, is characterized in that: the length of described rubble pile protection is the half of PHC pipe pile core length, and broken stone pile cover is looped around the top of PHC pipe pile core; Rubble pile protection and concrete pile core form PHC-SG stake.
5. a kind of concrete precast pipe pile according to claim 1 and piling prepressing Soft Ground device, it is characterized in that: the diameter of described PHC pipe pile core is 0.4m, wall thickness 95mm, and enter completely decomposed layer, the diameter of rubble pile protection is about 0.60m, length is 10m, and the spacing of concrete precast pipe pile is 2.5m.
6. a kind of concrete precast pipe pile according to claim 1 and piling prepressing Soft Ground device, it is characterized in that: the diameter of described PHC pipe pile core is 0.5m, wall thickness 100mm, length is 30.0m, the diameter of rubble pile protection 2 is about 0.8m, length is 15m, and the spacing of concrete precast pipe pile is 3.5m.
7. a kind of concrete precast pipe pile according to claim 1 and piling prepressing Soft Ground device, is characterized in that: precompressed preloading layer pile height is 4.0m, point two-stage, every grade of preloading height 2.0m.
8. a kind of concrete precast pipe pile according to claim 1 and piling prepressing Soft Ground device, is characterized in that: precompressed preloading layer pile height is 5.4m, divides three grades, every grade of preloading height 1.8m.
CN201420287212.8U 2014-05-30 2014-05-30 A kind of concrete precast pipe pile and piling prepressing Soft Ground device Expired - Fee Related CN204059332U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105064387A (en) * 2015-08-17 2015-11-18 合肥市市政设计院有限公司 Method for adjusting anti-thrust rigidity of pile group foundation
CN107130579A (en) * 2017-05-17 2017-09-05 重庆教育建设(集团)有限公司 Without muscle spread foundation constructing device and the dual composite foundation construction method of hard and soft
CN108999178A (en) * 2018-08-06 2018-12-14 宁波市交通规划设计研究院有限公司 A kind of Soft Soil Subgrade Treatment Method of soil body hardening form compound foundation
CN110206027A (en) * 2019-06-18 2019-09-06 中国五冶集团有限公司 A method of preventing that stake is drifted about in deep high flow plastic cumulosol
CN110565619A (en) * 2019-09-17 2019-12-13 浙江海洋大学 Foundation tamping device for civil engineering

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105064387A (en) * 2015-08-17 2015-11-18 合肥市市政设计院有限公司 Method for adjusting anti-thrust rigidity of pile group foundation
CN107130579A (en) * 2017-05-17 2017-09-05 重庆教育建设(集团)有限公司 Without muscle spread foundation constructing device and the dual composite foundation construction method of hard and soft
CN108999178A (en) * 2018-08-06 2018-12-14 宁波市交通规划设计研究院有限公司 A kind of Soft Soil Subgrade Treatment Method of soil body hardening form compound foundation
CN110206027A (en) * 2019-06-18 2019-09-06 中国五冶集团有限公司 A method of preventing that stake is drifted about in deep high flow plastic cumulosol
CN110565619A (en) * 2019-09-17 2019-12-13 浙江海洋大学 Foundation tamping device for civil engineering
CN110565619B (en) * 2019-09-17 2021-04-23 浙江海洋大学 Foundation tamping device for civil engineering

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Granted publication date: 20141231

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