CN103485334A - Bi-layer plastic-bushing inverted-arch cambered hollow special-shaped pile and construction method - Google Patents
Bi-layer plastic-bushing inverted-arch cambered hollow special-shaped pile and construction method Download PDFInfo
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- CN103485334A CN103485334A CN201310426114.8A CN201310426114A CN103485334A CN 103485334 A CN103485334 A CN 103485334A CN 201310426114 A CN201310426114 A CN 201310426114A CN 103485334 A CN103485334 A CN 103485334A
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- 229920003023 plastic Polymers 0.000 claims description 97
- 230000003014 reinforcing effect Effects 0.000 claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 12
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- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- 238000012545 processing Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
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Abstract
The invention relates to a bi-layer plastic-bushing inverted-arch cambered hollow special-shaped pile and a construction method. The pile is characterized by structurally comprising the inverted-arch cambered hollow special-shaped pile, a pile toe arranged at the bottom end of the special-shaped pile and fixed through fixing parts, and a precast reinforced concrete pile tip; a cemented soil layer is arranged on the outer side of a pile body; a cross section of the special-shaped pile is Y-shaped or X-shaped, and bushings with threads are arranged in a round hole in the center of the pile body and on the outer side of the pile body; a reinforcement cage, which is in the same shape as the pile body but slightly smaller than the pile body, is arranged in the pile body; horizontal and longitudinal tensile reinforcements are arranged in the reinforcement cage; and the fixing parts corresponding to the bushings and an immersed tube are arranged on the top face of the precast reinforced concrete pile tip. During construction, the pile toe and the inner bushing are fixed firstly, then the reinforcement cage and the outer bushing are sleeved, and concrete is poured between the inner bushing and the outer bushing as well as between the outer bushing and the immersed tube to respectively form a concrete pile core and a pile-side cemented soil layer. Area of the cross section of the pile body is small, consumption of building materials is reduced, bearing capacity is high, and the pile body is high in capability of resisting to environmental erosion.
Description
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Technical field
The present invention relates to a kind of Novel pile body structure and job practices, being particularly related to a kind of pile body cross section is the antiarch curve hollow shaped pile that Y shape or X-shaped, pile body center and the outside are provided with the double-layer plastic sleeve pipe of establishing the deformed bar cage in threaded plastic bushing, pile body, belong to the foundation engineering field, the ground be applicable in the engineerings such as building construction, highway, municipal administration, airport, dykes and dams is processed.
Background technology
Along with the development of China's modernization, the scale of infrastructure and the load of building are increasing, also more and more higher to the requirement of ground.The purpose that ground is processed is by a series of engineering measures, technical measures, structural measure, increases strength and stability, the minimizing foundation deformation of ground.At present, common method for processing foundation comprises composite foundation facture, consolidation, cushion, dynamic compaction etc., and various processing methods all have the corresponding scope of application and pluses and minuses.
Consider that composite foundation has the advantages such as consolidation effect is good, the duration is short, settlement after construction is little, in Base Consolidation Engineering, be widely applied, composite foundation reinforcing method commonly used has tube-sinking cast-in-situ pile, precast square pile, pile for prestressed pipe, plastic sleeve concrete pile etc., and it is circular or square that the transverse shape of pile body is generally.In above-mentioned treatment process of composite foundation, pile tube is to apply comparatively general a kind ofly, often is divided into pile for prestressed pipe and non-prestressed pile tube two classes, and it has bearing capacity of single pile can be high, applied widely, pile quality reliable, save the advantages such as constructional materials.But, because the pile body sectional area of pile tube is less, the ability that opposing lateral deformation and external environment corrode is poor.Tube-sinking cast-in-situ pile is to utilize sinking apparatus, to sink in soil with the steel pipe of steel concrete shoe (valve type pile shoe), form the stake hole, then put into cage of reinforcement concreting, extract sleeve pipe thereupon, vibration while utilizing tube drawing, by the concrete tamping, just forms needed castinplace pile.The pile body that tube-sinking cast-in-situ pile has avoided general bored pile pile top surface dust to cause sinks, and holds hypodynamic problem, has also effectively improved pile body surface laitance phenomenon simultaneously, and in addition, this technique is also more saved material.But construction quality is wayward, the too fast stake shortea that easily causes of tube drawing, and owing to being Squeezing Soil Pile, the stake of having poured into a mould in advance is vulnerable to soil compaction effect and produces inclined fracture and even misplace.
Shaped pile is also progressively applied in engineering in recent years, as Y shape stake, X-shaped stake, the stake of H shape etc., wherein antiarch curved surface Y, X-shaped stake are widely used shaped pile in current engineering, two kinds of stake types are the innovative techniques with China's independent intellectual property right, Y, X-shaped stake stake cambered inwards curved surface that week has, may be defined as the antiarch curved surface, the typical circular stake has cambered outwards curved surface, may be defined as the right arch curved surface.Y, its common trait of X-shaped stake for a change the traditional idea of stake " non-circle side ", there is cambered inwards antiarch curved surface, enlarge principle according to the uniform section special-shaped periphery, derive from the circular stake of tradition, as comparing with the circular stake of area of Y shape stake and diameter 377mm commonly used, girth is its 1.46 times, can adopt prefabricated pile or common tube-sinking cast-in-situ pile device context cast pile.Though this shaped pile has good mechanical characteristic, because thinner its corrosion resistance of pile lining is poor, stake side shear strength is on the low side.The more difficult control of construction quality of existing shaped pile, the uniformity that is mainly reflected in pile is inadequate, pile breaking phenomenon is outstanding etc.
Have at present the Novel pile body structure of establishing plastic bushing in the pile body outside, as plastic sleeve concrete pile, by prefabricated water proof pile top, screw plastic casing, concrete, pile cover (cover plate) etc., formed, suitable engineering background with also obtained relative engineering effort preferably under geological conditions, but its pile body cross section is circular, with the double-layer plastic sleeve pipe antiarch curve hollow shaped pile of this application, at aspects such as work progress, connected mode, stress performances, has larger difference.
In sum, although existing each method for processing foundation has been obtained good consolidation effect and economic benefit under suitable engineering specifications, some types corrode, resist lateral deformation, improve stock utilization, improve the aspect such as pile body stress performance and remain certain shortcoming resisting external environment.Given this, according to current actual conditions and technical condition, need at present a kind of antiseptic property of invention is good, supporting capacity is high, constructional materials is low-consuming Novel pile body structure and job practices badly, to meet the needs of Base Consolidation Engineering.
Summary of the invention
The object of the present invention is to provide that a kind of stress performance is good, supporting capacity is high, decay resistance is strong, and double-layer plastic sleeve pipe antiarch curve hollow shaped pile structure and the job practices that can save constructional materials, to enrich method for processing foundation, to improve the ground stabilization quality.
In order to realize above-mentioned technical purpose, the present invention has adopted following technical scheme:
A kind of double-layer plastic sleeve pipe antiarch curve hollow shaped pile, is characterized in that comprising antiarch curve hollow shaped pile and precast reinforced concrete pile point; Y-shaped or the X-shaped in the cross section of antiarch curve hollow shaped pile, the circular hole of connectivity is established at the pile body center vertically, and pile body center and the pile body outside are respectively equipped with threaded sleeve pipe;
Establish in pile body with pile body with shape but than the reinforcing cage of the little 100～200mm of pile body, horizontal tension rib is set in reinforcing cage;
It is conical that the bottom of precast reinforced concrete pile point is, and at the end face of precast reinforced concrete pile point, establishes the fixture corresponding with profile, the size of sleeve pipe, reinforcing cage, immersed tube, and this fixture is specially protruding falcon, tube connector or groove.
Described internal and external casing is threaded plastic bushing, the Y-shaped or X-shaped of outer side sleeve, and inboard sleeve pipe is rounded, and each saves between sleeve pipe and casing joint and adopts the mode of adhesive or riveted joint to be fixedly connected with.Described internal and external casing is single wall screw pvc pipe, PE pipe or HDPE pipe.
Between the adjacent stirrup of described precast reinforced cage, horizontal tension rib is set, between this horizontal tension rib and stirrup, vertical applied force reinforcing bar by colligation or be welded to connect, and laterally an end of tension rib is fixed in the middle part of stirrup, the other end is vertical fixing with contiguous stirrup.
Concrete perfusion in cavity between the threaded plastic bushing of inner circular and outside special-shaped casing tube, form the concrete pile core of Y-shaped or X-shaped; In the immersed tube inboard, the Grouting Pipe spacing ring is set, after the concrete pile core has filled, by Grouting Pipe, evenly is pressed into cement paste in the cavity between sleeve pipe and immersed tube laterally, form a stake side cement soil layer.
A kind of job practices of double-layer plastic sleeve pipe antiarch curve hollow shaped pile comprises the following steps:
Step 3, by the casing joint inner and outer tubes of spreading bilayer sleeve respectively, make the sleeve pipe total length surpass designing pile length 200mm ~ 300mm;
Step 4, first the threaded plastic bushing of the inner circular at pile body center is connected to sealing with the protruding falcon of precast pile tip with casing joint, and use the PVC adhesive cementation, again precast reinforced cage is placed in to the outside of the circular threaded plastic bushing of pile body center inside, finally be socketed outer side sleeve, and outer side sleeve is connected and seals with the tube connector of precast pile tip;
Step 6, the immersed tube, pile body central circular sleeve pipe, outer side sleeve, the Grouting Pipe that adopt the stake pile driver to connect with precast pile tip, evenly squeeze in ground together with reinforcing cage;
Step 7, lifting immersed tube, stay pile body central circular sleeve pipe, reinforcing cage, outer side sleeve in foundation soil body;
Step 9, after all pile body sleeve pipes are pressed into ground, to concrete perfusion jolt ramming in the cavity between pile body central circular sleeve pipe and outer side sleeve, form the concrete pile core of Y-shaped or X-shaped;
the present invention has the following advantages and beneficial effect:
(1) stake of antiarch curve special is due to the existence of antiarch curved surface, can improve the stress performance of pile body in the situation that the fixing expansion of cross sectional area pile body girth, improved the ability of pile body opposing transverse bending moment, moment of torsion.
(2) plastic bushing of pile body inboard and arranged outside both can be used as the template of pile body concreting, had improved pile quality; Can, by concrete pile core and external environment isolation, improve the corrosion resistance of pile body again.
(3) sidewall of pile body outer side sleeve is shape of threads, can strengthen the frictional resistance of pile body and the extraneous soil body, improves the supporting capacity of pile body.
(4) by the Grouting Pipe between outside Special plastic sleeve pipe and circular immersed tube to stake side soil body mud jacking, can form certain thickness stake side cement soil layer stake week, improve pile body and the adhesion strength of the stake side soil body and the supporting capacity of a side soil body.
(5) precast pile tip adopts anticorrosion concrete prefabricated, and the pile top end face preset can with the close-connected sleeve pipe plug of double-layer plastic sleeve pipe and tube connector, can guarantee that sleeve pipe and pile top are airtight to be connected, cut off contacting of underground water and concrete pile body from bottom.
In a word, characteristics of the present invention are to have advantages of the stake of antiarch curve special and pile tube simultaneously, not only can improve stress performance, the increase pile side friction of pile body, and can improve the supporting capacity of corrosion resistance and the stake side soil body of pile body, can also save the consumption of pile body constructional materials, there is technical economic benefit preferably.
The accompanying drawing explanation
Fig. 1 is the combination stereogram of double-layer plastic sleeve pipe antiarch curve hollow shaped pile of the present invention;
Fig. 2 is the sectional drawing of double-layer plastic sleeve pipe antiarch curve hollow shaped pile of the present invention;
Fig. 3 is the cross-sectional drawing of double-layer plastic sleeve pipe antiarch curve hollow shaped pile of the present invention;
Fig. 4 is the cross-sectional drawing of double-layer plastic sleeve pipe antiarch curve hollow shaped pile reinforcing cage of the present invention;
Fig. 5 is the sectional drawing of double-layer plastic sleeve pipe antiarch curve hollow shaped pile precast concrete pile pile top of the present invention;
Fig. 6 is the plan view of double-layer plastic sleeve pipe antiarch curve hollow shaped pile precast concrete pile pile top of the present invention;
Fig. 7 is the construction process figure of double-layer plastic sleeve pipe antiarch curve hollow shaped pile of the present invention.
In figure: the threaded plastic bushing of 1-inner circular, 2-outside Y-bandage screw plastic casing, 3-deformed bar cage, 4-inboard cover pipe connected pipe, 5-inboard plastic bushing connects protruding falcon, 6-outer side sleeve tube connector, 7-outside plastic bushing connects protruding falcon, 8-immersed tube connecting groove, 9-precast reinforced concrete pile point, 10-stake side cement soil layer, the horizontal tension rib of 11-reinforcing cage, 12-reinforcing cage Reinforcement, 13-reinforced concrete pile core, 14-reinforcing cage lateral tie, 15-Grouting Pipe, 16-immersed tube, 17-cast-in-situ steel reinforced concrete pile cover, 18-plastic bushing joint.
Specific embodiment
The design and construction technical requirements of pile body deformed bar cage, the design and construction technical requirements of precast pile tip, the design and construction technical requirements of pile body concrete, reinforcing cage, stake side cement-soil, the bonding construction technical requirement of plastic bushing and casing joint etc., in present embodiment, be not repeated, emphasis is set forth the embodiment that the present invention relates to structure.
Fig. 1 is the combination stereogram of double-layer plastic sleeve pipe antiarch curve hollow shaped pile; Fig. 2 is the sectional drawing of double-layer plastic sleeve pipe antiarch curve hollow shaped pile of the present invention, and Fig. 3 is the cross-sectional drawing of double-layer plastic sleeve pipe antiarch curve hollow shaped pile.
Shown in Fig. 1,2,3, double-layer plastic sleeve pipe antiarch curve hollow shaped pile, the threaded plastic bushing 1 of inner circular mainly arranged by the pile body center and outside Y-bandage screw plastic casing 2, deformed bar cage 3, precast reinforced concrete pile point 9, stake side cement soil layer 10, reinforced concrete pile core 13, cast-in-situ steel reinforced concrete pile cover 17 form.
The cross section of antiarch curve special stake is Y-shaped, and circular threaded plastic bushing 1 is established at the pile body center, outside Y-bandage screw plastic casing 2.
The threaded plastic bushing 1 of inner circular, outside Y-bandage screw plastic casing 2, all adopt single wall PVC plastic film capicitor, every joint cover pipe range 6m; The nominal diameter of the threaded plastic bushing 1 of inner circular is 200mm; The outsourcing circular diameter of outside Y-bandage screw plastic casing 2 is 600mm, and the open arc spacing is 300mm.
The threaded plastic bushing 1 of inner circular, outside Y-bandage screw plastic casing 2 all adopt the plastic bushing joint 18 of corresponding size to connect, and plastic bushing joint 18 is double-decker, adopts the PVC straight coupling, and the bellmouth degree of depth is 50mm; Firm by PVC adhesive glue bonding between the threaded plastic bushing 1 of every joint inner circular or outside Y-bandage screw plastic casing 2 and plastic bushing joint 18.
The external diameter of immersed tube 16 is 700mm, adopts seamless steel pipe.The strength grade of steel is Q345, thickness 20mm, and dimensions meets the requirement of the existing related specifications of standard.
In double-layer plastic sleeve pipe antiarch curve hollow shaped pile end, precast reinforced concrete pile point 9 is set, Fig. 5 is the sectional drawing of double-layer plastic sleeve pipe antiarch curve hollow shaped pile precast concrete pile pile top; Fig. 6 is the plan view of double-layer plastic sleeve pipe antiarch curve hollow shaped pile precast concrete pile pile top; Shown in Fig. 4,5,6, in double-layer plastic sleeve pipe antiarch curve hollow shaped pile end, precast reinforced concrete pile point 9 is set, precast reinforced concrete pile point 9 is reinforced concrete structure, adopt the circular pile top that diameter is 800mm, it is conical that the pile top bottom is, cone height is 300mm, and top is cylindrical, and the cylinder height is 250mm; The strength grade of concrete of precast reinforced concrete pile point 9 is C30, adopts corrosion resistant concrete to build, and requires the pile top surfacing closely knit, honeycomb, pitted skin and the losing angle phenomenon that must not have area to be greater than 1%; The III grade reinforcing steel that the inner employing of pile top diameter is 12mm.
Precast reinforced concrete pile point 9 is connected by inserting mode with hollow shaped pile, and the upper face center of precast reinforced concrete pile point 9 is provided with the inboard cover pipe connected pipe 4 consistent with threaded plastic bushing 1 caliber of inner circular and is connected protruding falcon 5 with inboard plastic bushing; The diameter that inboard plastic bushing connects protruding falcon 5 is 180mm, exceeds upper surface 150mm; The diameter of inboard cover pipe connected pipe 4 is 240mm, exceeds upper surface 200mm, stretches into pile top concrete 200mm.
For the ease of fixing shaped pile, the periphery that connects protruding falcon 5 at the upper surface of precast reinforced concrete pile point 9, inboard plastic bushing arranges the fixture consistent with opposite sex stake cross section, be embodied in: the outer side sleeve tube connector 6 corresponding with Y-bandage screw plastic casing 2 positions, the outside, size, profile is set and is connected protruding falcon 7 with outside plastic bushing, outside plastic bushing connects that protruding falcon 7 is rectangular or fan is annular; Outside plastic bushing connects protruding falcon 7, exceeds upper surface 150mm, and wide is 50mm, and limit (arc) is long is 200mm; Outer side sleeve tube connector 6 exceeds upper surface 200mm, and limit (arc) is long for 200mm, stretches into pile top concrete 200mm.
Inboard cover pipe connected pipe 4, outer side sleeve tube connector 6 all adopt light surface and PVC pipe, and pipe thickness is 10mm, and quality and dimensional requirement meet the current specifications requirement.
The upper surface of precast reinforced concrete pile point 9 also is provided with immersed tube connecting groove 8, the external diameter 700mm of this groove 8, and bottom land width 30mm, groove depth is 150mm.
Fig. 4 is the cross-sectional drawing of double-layer plastic sleeve pipe antiarch curve hollow shaped pile reinforcing cage; Shown in Fig. 4, the transverse shape of the precast reinforced cage 3 of abnormity is Y-shaped, its outsourcing circular diameter is 500mm, comprise the horizontal tension rib 11 of reinforcing cage, reinforcing cage Reinforcement 12, reinforcing cage lateral tie 14, horizontal tension rib 11 1 ends of reinforcing cage are located at the middle part of stirrup, and the other end is vertical with contiguous stirrup; Laterally between tension rib 11 and stirrup 14, reinforcing cage Reinforcement 12, the employing colligation is connected; Reinforcement 12 adopts the III level indented bars that diameter is 22mm; The horizontal tension rib 11 of reinforcing cage and lateral tie 14 all adopt the I grade reinforcing steel that diameter is 10mm, and the horizontal tension rib 11 of reinforcing cage vertically is spaced apart 200mm.
After immersed tube 16 and precast reinforced concrete pile point 9 are squeezed into ground, in the toroidal cavity formed at outside Y-bandage screw plastic casing 2 and immersed tube 16, insert Grouting Pipe 15, Grouting Pipe adopts the pvc pipe that diameter is 30mm; Can form a side cement soil layer 10 by this Grouting Pipe 15 to mud jacking in the soil body of the pile body outside.
The concrete of reinforced concrete pile core 13 adopts the pea gravel concreten of C30, requires the concrete aggregate maximum particle diameter to be no more than 25mm, and the concrete work performance meets the current specifications requirement; And, during concreting, need along full stake is long, vibrate evenly with vibrating head.
Fig. 7 is the construction process figure of double-layer plastic sleeve pipe antiarch curve hollow shaped pile of the present invention, and shown in Fig. 7, the work progress of double-layer plastic sleeve pipe antiarch curve hollow shaped pile comprises:
Step 3, with the casing joint respectively threaded plastic bushing 1 of inner tube inner circular and the outer tube outside Y-bandage screw plastic casing 2 of spreading bilayer sleeve, make the sleeve pipe total length surpass designing pile length 200mm ~ 300mm;
Step 4, first the threaded plastic bushing 1 of the inner circular at pile body center is connected to sealing with the protruding falcon 5 of precast pile tip 9 with casing joint 4, and use the PVC adhesive cementation, again precast reinforced cage 3 is placed in to the outside of the circular threaded plastic bushing 1 of pile body center inside, finally be socketed outer side sleeve outside Y-bandage screw plastic casing 2, and outer side sleeve outside Y-bandage screw plastic casing 2 is connected and seals with the tube connector of precast pile tip 9;
Step 6, the threaded plastic bushing 1 of immersed tube 16, inner circular, outside Y-bandage screw plastic casing 2, the Grouting Pipe 15 that adopt the stake pile driver to connect with precast pile tip 9, evenly squeeze in ground together with reinforcing cage 3;
Step 7, lifting immersed tube 16, stay the threaded plastic bushing 1 of circle, outside Y-bandage screw plastic casing 2, Grouting Pipe 15 in foundation soil body;
Step 9, after all pile body sleeve pipes are pressed into ground, concrete perfusion jolt ramming in the cavity between circular threaded plastic bushing 1 and outside Y-bandage screw plastic casing 2 to the inside, form Y-shaped concrete pile core;
According to the content of above embodiment record, described shaped pile cross section can be also X-shaped, and related content is not specifically set forth, but also within protection scope of the present invention.
Claims (8)
1. a double-layer plastic sleeve pipe antiarch curve hollow shaped pile, is characterized in that comprising antiarch curve hollow shaped pile and precast reinforced concrete pile point; Y-shaped or the X-shaped in the cross section of antiarch curve hollow shaped pile, the circular hole of connectivity is established at the pile body center vertically, and pile body center and the pile body outside are respectively equipped with threaded sleeve pipe;
Establish in pile body with pile body with shape but than the reinforcing cage of the little 100～200mm of pile body, horizontal tension rib is set in reinforcing cage;
It is conical that the bottom of precast reinforced concrete pile point is, and at the end face of precast reinforced concrete pile point, establishes the fixture corresponding with profile, the size of sleeve pipe, reinforcing cage, immersed tube, and this fixture is specially protruding falcon, tube connector or groove.
2. double-layer plastic sleeve pipe antiarch curve hollow shaped pile according to claim 1, it is characterized in that described internal and external casing is threaded plastic bushing, Y-shaped or the X-shaped of outer side sleeve, inboard sleeve pipe is rounded, and each saves between sleeve pipe and casing joint and adopts the mode of adhesive or riveted joint to be fixedly connected with.
3. double-layer plastic sleeve pipe antiarch curve hollow shaped pile according to claim 2, is characterized in that described internal and external casing is single wall screw pvc pipe, PE pipe or HDPE pipe.
4. double-layer plastic sleeve pipe antiarch curve hollow shaped pile according to claim 1, it is characterized in that, between the adjacent stirrup of described precast reinforced cage, horizontal tension rib is set, between this horizontal tension rib and stirrup, vertical applied force reinforcing bar by colligation or be welded to connect.
5. double-layer plastic sleeve pipe antiarch curve hollow shaped pile according to claim 4, is characterized in that an end of horizontal tension rib is fixed in the middle part of stirrup, and the other end is vertical fixing with contiguous stirrup.
6. double-layer plastic sleeve pipe antiarch curve hollow shaped pile according to claim 1, is characterized in that concrete perfusion in the cavity between the threaded plastic bushing of inner circular and outside special-shaped casing tube, forms the concrete pile core of Y-shaped or X-shaped.
7. double-layer plastic sleeve pipe antiarch curve hollow shaped pile according to claim 1, it is characterized in that, in the immersed tube inboard, the Grouting Pipe spacing ring is set, evenly be pressed into cement paste in cavity between sleeve pipe and immersed tube laterally by Grouting Pipe after the concrete pile core has filled, form a stake side cement soil layer.
8. the job practices based on claim 1 to 7 any one double-layer plastic sleeve pipe antiarch curve hollow shaped pile is characterized in that comprising the following steps:
Step 1, smooth location, the sand cushion that laying depth is 200mm ~ 300mm, hardcore bed or the slag blanket of gently delaying;
Step 2, precast reinforced concrete pile point, pile top end face diameter is than the large 150mm ~ 250mm of outside immersed tube, and is provided for the cover pipe connected pipe and the protruding falcon that are connected with the double-layer plastic sleeve pipe at its end face, with pile body, surveys the groove that immersed tube is connected outward;
Step 3, by the casing joint inner and outer tubes of spreading bilayer sleeve respectively, make the sleeve pipe total length surpass designing pile length 200mm ~ 300mm;
Step 4, first the threaded plastic bushing of the inner circular at pile body center is connected to sealing with the protruding falcon of precast pile tip with casing joint, and also cementing with the PVC cementing agent, again precast reinforced cage is placed in to the outside of the circular threaded plastic bushing of pile body center inside, finally be socketed outer side sleeve, and outer side sleeve is connected and seals with the tube connector of precast pile tip;
Step 5, first adopt lifting rope to stretch in the steel pipe immersed tube of the outside from the bottom of outside steel pipe immersed tube with the sleeve pipe of pile top, then the grouting behind shaft or drift lining pipe is inserted in the immersed tube spacing ring, finally immersed tube is connected with precast pile tip closely;
Step 6, the immersed tube, pile body central circular sleeve pipe, outer side sleeve, the Grouting Pipe that adopt the stake pile driver to connect with precast pile tip, evenly squeeze in ground together with reinforcing cage;
Step 7, lifting immersed tube, stay pile body central circular sleeve pipe, reinforcing cage, outer side sleeve in foundation soil body;
Step 8, pile driver is moved to next position;
Step 9, after all pile body sleeve pipes are pressed into ground, to concrete perfusion jolt ramming in the cavity between pile body central circular sleeve pipe and outer side sleeve, form the concrete pile core of Y-shaped or X-shaped;
Step 10, by the grouting behind shaft or drift lining pipe, inject concrete in the cavity between sleeve pipe and immersed tube laterally, form a stake side cement soil layer;
Step 11, in the stake topmast, establish template, concreting forms cast-in-place pile cover; After concrete curing expires 28 days, build and lay the thick sand cushion of 300mm ~ 700mm in the stake top casting, and lay geo-grid at the sand cushion top.
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| CN104141304A (en) * | 2014-08-06 | 2014-11-12 | 冠鲁建设股份有限公司 | Extrusion formed precast pile stiffness core and cement soil combined Y-shaped pile and construction method thereof |
| CN104234044A (en) * | 2014-09-24 | 2014-12-24 | 杭州江润科技有限公司 | Freezing process hole protecting special-shaped pile forming method |
| CN104234045A (en) * | 2014-09-01 | 2014-12-24 | 安徽省交通建设有限责任公司 | Vibrating immersed tube dry material perfusion special-shaped woven bag pile and construction method |
| CN106351209A (en) * | 2016-09-21 | 2017-01-25 | 成都启立辰智科技有限公司 | Concrete pile |
| CN111101504A (en) * | 2019-12-30 | 2020-05-05 | 中交武汉港湾工程设计研究院有限公司 | Stabilized soil extrusion curing precast pile and soft foundation treatment method applied to same |
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| CN104234044B (en) * | 2014-09-24 | 2015-12-30 | 杭州江润科技有限公司 | A kind of freezing process guard aperture shaped pile piling method |
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| CN111101504A (en) * | 2019-12-30 | 2020-05-05 | 中交武汉港湾工程设计研究院有限公司 | Stabilized soil extrusion curing precast pile and soft foundation treatment method applied to same |
| CN114351771A (en) * | 2021-12-02 | 2022-04-15 | 西安理工大学 | Soil-squeezing pedestal pile model for collapsible loess foundation reinforcement and use method thereof |
| CN114351771B (en) * | 2021-12-02 | 2023-07-21 | 西安理工大学 | Soil squeezing pedestal pile model for collapsible loess foundation reinforcement and use method thereof |
| CN116639946A (en) * | 2023-06-26 | 2023-08-25 | 王曦锐 | Sludge curing agent and sludge in-situ curing method |
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