CN203924036U - A kind of pile for prestressed pipe of outsourcing active material pile body - Google Patents
A kind of pile for prestressed pipe of outsourcing active material pile body Download PDFInfo
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- CN203924036U CN203924036U CN201420252579.6U CN201420252579U CN203924036U CN 203924036 U CN203924036 U CN 203924036U CN 201420252579 U CN201420252579 U CN 201420252579U CN 203924036 U CN203924036 U CN 203924036U
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Abstract
The utility model relates to a kind of pile for prestressed pipe of outsourcing active material pile body, it is characterized in that the long outsourcing geotechnique of the full stake of pile for prestressed pipe cloth bag, and stake bottom is provided with prefabricated expansion pile top, and the bottom binding of geotechnological cloth bag is fixed on prefabricated expansion pile top; In geotechnique's cloth bag, ring-stiffened body is set, ring-stiffened body bottom is fixedly connected with dowel in prefabricated expansion pile top; The outer latticed hoop constraint body of lock ring of geotechnique's cloth bag, is filled with active material between pile for prestressed pipe and geotechnological cloth bag, after active material imbibition, is tightly strangled formation block-like protrusions by latticed hoop constraint body.The utility model has utilized active material hydration swelling effect, coordinate the latticed hoop constraint body of geotechnological cloth bag and outsourcing moulding, can improve pile body performance, and after pile for prestressed pipe outsourcing active material pile body, can avoid underground water corrosion pile concrete, there is higher technical economic benefit.
Description
Technical field
The utility model relates to a kind of pile for prestressed pipe of outsourcing active material pile body, after being particularly related to a kind of active material aquation, retrain the high-strength pipe pile that is shaped, is wrapped in pile for prestressed pipe outward, belong to ground process field, be applicable to the foundation treatment engineering in soft clay area, underconsolidated soil area, be particularly useful for adopting mud off to draw hole and plant pile driving construction pile foundation, have the foundation treatment engineering under the operating modes such as underground water corrosion concrete.
Background technology
Weak soil is generally the soft fine soil grain of moulding stream and mould state, as mud and mucky soil, peat soil and bog soil, and the saturated cohesive soil of other high-compressibilities, silt etc., wherein mud and mucky soil are the main Types of weak soil.Soft Ground is exactly the stress layer under the basis of building or equipment to be improved to the intensive treatment of its strength and stability, to improve or the native state of consolidated subsoil, makes it to meet the technical measures of engine request.
At present, in the time that the ground of soft clay area is processed, often consider to adopt the processing methods such as consolidation, Piles for Friction Piles method.Wherein, consolidation is first the vertical drainage bodies such as sand drain (sand wick or plastic drain) to be set in ground, then utilizes upper load to load precompressed to place, pore water in the soil body is discharged, fixed gradually, ground generation sedimentation, the method that intensity progressively improves simultaneously.Piles for Friction Piles is the main ground stabilization mode that relies on the frictional resistance of stake side soil to support vertical load, and under ultimate limit states, stake top vertical load is born by pile side resistance completely, and end resistance is little of ignoring.
Except above-mentioned common soft-soil foundation treatment method, existing a kind of novel soft-soil foundation treatment method---the method (CN 102168420 B) of processing soft soil base by geotextile light active material piles, this technology is utilized the water absorbing properties of active material, make soil solidifying, and hydration swelling, under the parcel of geotechnological cloth bag, pile body is more closely knit.Relatively traditional consolidation, is implanted into active material pile body at ground, can suitably improve bearing capacity of foundation soil.But active material stake is due to materials limitations, self bearing capacity, compared to reinforced concrete pile body bearing capacity, is not well positioned to meet some building bearing capacity of foundation soil requirements, has certain limitation.And, because geotechnological cloth bag (steel sleeve is extracted before cloth bag active material aquation) is only wrapped up in outside, after pile body expands, geotechnique's cloth bag easily breaks, or due to periphery soil property inequality, finally cause active material pile body pile irregular, its transmission force property is weakened to some extent.
Composite foundation has the advantages such as consolidation effect is good, the duration is short, settlement after construction is little, in reinforced soft soil ground engineering, is also widely used.The stake type that can be used for composite foundation stabilization is more, and wherein, pile tube has that folk prescription bearing capacity of concrete-filled is high, side friction is large and the advantage such as anti-bending strength is good, selected by increasing Soft Ground engineering.But pile tube, because its pile body is relatively thin, has under corrosive geological conditions at underground water, after pile concrete is etched, pile foundation supporting capacity is obviously weakened, and cannot meet design requirement.
In addition, for problems such as pile tube corrosion and pile side friction deficiencies, existing cement slotting stake and the quiet brill of stake side slip casting are planted the technology such as stake, implant slip casting compound pile (CN 203213101 U) as example taking one, this technology adopts draws hole early stage, improve a prefabricated tubular pile lower speed, and successfully solved prefabricated tubular pile and press down generation soil compaction effect and affect surrounding building problem; Increase pile body side friction and stake side soil strength by the slip casting of stake side, not only improved bearing capacity of pile foundation, also utilized cement-soil parcel to avoid pile tube directly to contact external environment condition, made pile tube there is good durability.But, due to the inhomogeneity of the ground depths soil body, by the die-cut pile peripheral earth of manual control grouting pressure, there is larger deviation in all cement-soils of stake and the design of formation, and in order to ensure the full property of cement-soil, grouting amount is bigger than normal, on part of cement slurries, overflow, and draw hole and also may adopt mud off early stage, if can not effectively guide dredging, easily cause construction plant muddy, even contaminated environment.
In sum, existing achievement in research is respond well to reinforced soft soil ground under suitable engineering specifications, as active material stake have pile-forming speed fast, discharge the advantages such as interstitial hydraulic pressure is effective, and high, the easy to control the quality system of pile for prestressed pipe intensity, working procedure are simple etc.But still deposit certain deficiency, be mainly reflected in that single-activity material pile body bearing capacity is low, thin-wall pipe pile poor durability, the slip casting of stake side under corrosivity operating mode forms the aspects such as cement-soil shape is wayward.Given this, based on the actual needs of current engineering, urgently invent at present a kind ofly taking prefabricated pipe as novel pile body main, active material outsourcing protection pile tube, this type can produce positive impact to bearing capacity of pile foundation, and has better durability.
Summary of the invention
The purpose of this utility model is to provide that a kind of pile body supporting capacity is high, pile body excellent in durability, can absorb the outsourcing active material pile body pile for prestressed pipe of moisture in a side soil body or mud.
For realizing above-mentioned technical purpose, the utility model has adopted following technical scheme:
A pile for prestressed pipe for outsourcing active material pile body, is characterized in that the long outsourcing geotechnique of the full stake of pile for prestressed pipe cloth bag, and stake bottom is provided with prefabricated expansion pile top, and the bottom binding of geotechnological cloth bag is fixed on prefabricated expansion pile top; In geotechnique's cloth bag, ring-stiffened body is set, ring-stiffened body bottom is fixedly connected with dowel in prefabricated expansion pile top; The outer latticed hoop constraint body of lock ring of geotechnique's cloth bag, is filled with active material between pile for prestressed pipe and geotechnological cloth bag, after active material imbibition, is tightly strangled formation block-like protrusions by latticed hoop constraint body.
Described geotechnological cloth bag is sewed up and is formed by anti-filter geotextiles, and it is cylindric that entirety is, and diameter is 1.10 ~ 1.25 times of pile for prestressed pipe external diameter, and is not less than prefabricated expansion pile top maximum outside diameter.Geotechnique's cloth bag is made material need have anti-filter function and higher tensile property,
Described ring-stiffened body adopts reinforcing bar or steel moulding material to make, and also can adopt the good hard material of other independence, is arranged at pile for prestressed pipe with geotechnological cloth bag encloses in the space forming, and geotextiles is apart from remaining between 30 ~ 50mm.
Described latticed hoop constraint body should adopt tabular high-strength elastic material, the need self without rotproofness do suitable preservative treatment, preferably adopting steel to mould grid makes, for cylindric, diameter is identical with expansion pile top maximum outside diameter, one circle can be divided into 6 ~ 10 grids, and grid vertical height is suitable between 500 ~ 1200mm.
The discrete material that active material is combined by design proportioning by lime, flyash and slag, active material absorbs stake side moisture, and slurry becomes outsourcing active material pile body admittedly, simultaneously due to bulking effect, expands the geotechnological cloth bag of outsourcing.
Described block-like protrusions maximum outside diameter is greater than prefabricated expansion pile top maximum outside diameter, utilizes discrete material hydration swelling to be squeezed in a side soil body.
The prefabricated expansion pile top of outsourcing active material pile body pile for prestressed pipe, is made up of enlarged footing and connected unit, adopts reinforcing bar and concrete monobloc cast to form, and entirety is sealing pile top; Enlarged footing maximum external diameter is pile for prestressed pipe 1.05 ~ 1.20 times, lower diameter is dwindled gradually; Connected unit is cylindric, height 300 ~ 500mm, and upper surface is planted dowel in advance, and side is provided with embedded groove, and inner reserved vestibule is pile tube patchhole, can reserved steel bar concrete perfusion in it, improve pile tube and prefabricated expansion pile top bonding strength.
The construction method of outsourcing active material pile body pile for prestressed pipe, mainly comprises the following steps:
1) preparation of construction: make required prefabricated expansion pile top, ring-stiffened body and latticed hoop constraint body according to designing requirement, sew up geotechnological cloth bag, and place is peaceful, machinery is marched into the arena;
2) pile body combination: pile for prestressed pipe bottom connects prefabricated expansion pile top, and strengthen connecting at the inner concrete perfusion of pile tube patchhole;
3) attached connection: be socketed successively ring-stiffened body in pile for prestressed pipe outside, the dowel welding in ring-stiffened body and prefabricated expansion pile top, is fixed in the embedded groove on precast pile tip with the colligation of latticed hoop constraint body after geotechnological cloth bag is folding;
4) bore and scrape out hole: utilize machinery to form and plants a vestibule, carry out mud off, bury if desired casing underground, vestibule diameter is determined according to pile for prestressed pipe external diameter, guaranteeing that prefabricated expansion pile top presses down can reaming;
5) pile body presses down: during the pile body after combination is pressed in hole, while pressing down, should keep pile body straight down, press down after certain depth, bury casing underground in aperture, prevent orifice deformation;
6) pour into active material: pile body presses down piecemeal, progressively launch, promote geotechnological cloth bag, and gradation pours into graininess active material in geotechnological cloth bag simultaneously;
7) preliminary pile: treat that pile for prestressed pipe presses to design bottom surface absolute altitude, geotechnological cloth bag Synchronous lifting is to pushing up and pour into full active material, appropriate compacting;
8) pile body expands: active material fully absorbs aquation expansion after moisture in a side soil body or mud, under geotechnological cloth bag and the constraint of latticed hoop constraint body, forms block-like protrusions.
the utlity model has following feature and beneficial effect:
(1) the utlity model has when drawing hole embedded pile advantage, because its outsourcing has the active material of water absorbing properties, moisture in slurry coat method while absorbing pore-forming and the stake side soil body, impels a side soil body that larger bearing capacity and side friction is provided, and can reduce discarded slurry amount spill-out.
(2) after the active material hydration swelling of the utility model outsourcing, can expand active material pile body external diameter, and under the latticed hoop constraint body in outside and the constraint of geotechnological cloth bag, its surface is strangled out block-like protrusions and is squeezed in a side soil body, the pile side friction loss that the precast pile tip reaming effect of having avoided tradition to draw hole embedded pile causes.
(3) active material expands under obligatory point and geotechnological cloth bag parcel, and the active material pile body of formation is more closely knit, has more stable moulding effect, has further improved vertical, level and the anti-seismic performance of pile body.
(4) after pile body pile described in the utility model, pile for prestressed pipe outsourcing active material pile body and geotechnological cloth bag, and be provided with prefabricated expansion pile top at stake end, pile tube main body does not directly contact external environment condition, improve the durability of pile tube, at underground water, concrete has been existed and under corrosive operating mode, there is stronger applicability.
In a word, the utility model has the effect of discharging consolidation and composite consolidation ground concurrently, drawing hole compared to tradition, to plant pile construction technology pile foundation supporting capacity loss little, take full advantage of active material and absorb the hydration swelling effect after stake side moisture, pile body form stable, not only improve strength of the mixing pile and pile side friction, and reduced mud contamination, there is certain environmental benefit.
Brief description of the drawings
Fig. 1 is the schematic diagram of a kind of outsourcing active material of the utility model pile body pile for prestressed pipe;
Fig. 2 is the thin portion of prefabricated expansion pile top described in the utility model structural representation;
Fig. 3 is anabolic process schematic diagram before a kind of outsourcing active material of the utility model pile body pile for prestressed pipe pile;
Fig. 4 is the construction process schematic diagram of a kind of outsourcing active material of the utility model pile body pile for prestressed pipe;
Wherein: 1-pile for prestressed pipe; 2-ring-stiffened body; 3-active material pile body; 4-geotechnique cloth bag; The latticed hoop constraint body of 5-; 6-block-like protrusions; The prefabricated expansion pile top of 7-; 8-steel strand; 9-dowel; 10-pile tube patchhole; 11-connected unit; 12-embedded groove; 13-enlarged footing; 14-active material; The 15-stake side soil body.
Detailed description of the invention
In present embodiment, geotechnological cloth bag stitching, reinforcing body and constraint system are done requirement, the requirement of prefabricated expansion pile top manufacturing technology, prefabricated and the piling construction technical requirements of pile for prestressed pipe, active material mix-design requirement etc. is not repeated, and emphasis is set forth embodiment of the present utility model.
Fig. 1 is the schematic diagram of a kind of outsourcing active material of the utility model pile body pile for prestressed pipe; Fig. 2 is the thin portion of prefabricated expansion pile top described in the utility model structural representation; Fig. 3 is anabolic process schematic diagram before a kind of outsourcing active material of the utility model pile body pile for prestressed pipe pile.Shown in Fig. 1 ~ 3, a kind of outsourcing active material pile body pile for prestressed pipe mainly comprises: pile for prestressed pipe 1, active material pile body 3 and prefabricated expansion pile top 7.Wherein active material pile body is made up of active material 14, geotechnological cloth bag 4, latticed hoop constraint body 5 and the block-like protrusions 6 of ring-stiffened body 2, aquation; And prefabricated expansion pile top comprises several parts such as dowel 9, pile tube patchhole 10, connected unit 11, embedded groove 12 and enlarged footing 13.
The present embodiment is using the pile for prestressed pipe of external diameter 600mm, wall thickness 110mm as main pile body.
Ring-stiffened body 2 adopts diameter 780mm, the reinforcing cage of main muscle diameter 12mm.Geotechnique's cloth bag 4 is in unstressed effect situation, diameter is generally active material pile body 3 and designs 0.9 ~ 1.0 times of external diameter, the present embodiment is got 1100mm, selection has the geotextiles of spinning of anti-filter effect, this material has good anti-filter effect and decay resistance, can keep powerful and elongation fully under dry and wet state.Latticed 5 diameter 950mm(weeks of hoop constraint body are about 3000mm), adopt steel to mould grid, this material produces high tensile modulus under low strain capacity, and there is higher decay resistance, according to the utility model design needs, grid grid specification adopts 600mm × 375mm, and a hoop net trellis hoop constraint body 5 can be divided into 8 lattice, while expanding outwardly from grid after squeezed geotechnological cloth bag 4 after active material 14 imbibitions, be not subject to larger resistance, ensured the formation quality of block-like protrusions 6.Active material pile body 3 is the front external diameter of hydration swelling and latticed hoop constraint body 5 equal diameters not, fully after imbibition, according to the general inflatable 1.2 times of left and right of design, under the present embodiment condition, can make more than active material pile body diameter reaches 1100mm, ensure that it is wrapped in pile for prestressed pipe 1 thickness and is not less than 200mm outward.Length and the conventional specification of pile for prestressed pipe 1 of ring-stiffened body 2, active material pile body 3, geotechnological cloth bag 4, latticed hoop constraint body 5 etc. are basic identical, can be slightly short.
According to pile for prestressed pipe 1 specification and above-mentioned each scantling, prefabricated expansion pile top 7 is pier-stage type solid steel reinforced concrete pile top, molding is in advance built and is formed, each spot size is as follows: dowel 9 implantation depths are not less than 100mm, reserved connecting length 150mm left and right, adopts the above indented bars of diameter 12mm; Pile tube patchhole 10 internal diameter 600mm, the degree of depth is 200mm; Connected unit 11 internal diameters are 600mm, external diameter 900mm, and height 200mm, the embedded groove 12 of the 20mm that caves inward is enclosed in its outside reserved 1 ~ 2; Enlarged footing 13 external diameters are that 1000mm section height is 500mm, and bottom 200mm height section external diameter is progressively contracted to 600mm.
Pile body construction method described in the utility model is as follows:
Make in advance ring-stiffened body 2, geotechnological cloth bag 4, latticed hoop constraint body 5 and the prefabricated expansion pile top 7 that construction needs, proportioning active material 14, and pile for prestressed pipe 1 is transported to construction plant.
Aperture apparatus (as rotary digging drilling machine) is drawn in employing, and in design stake position, place is drilled with 600 ~ 800mm vestibule, for preventing hole wall collapse, can be aided with mud off, and drilling depth is slightly less than designing pile length.
After pile for prestressed pipe 1 and prefabricated expansion pile top 7 are combined, successively ring-stiffened body 2, geotechnological cloth bag 4 and latticed hoop constraint body 5 are fixed on to the each link position of prefabricated expansion pile top 7 place by welding or steel strand 8 colligations, wherein geotechnological cloth bag folding placement in 4 early stages, sack is temporarily fixed on the horizontal grid of latticed hoop constraint body 5.
After pile body has combined, can adopt pile vibrosinking equipment, by pressing down pile for prestressed pipe 1, whole pile body be pressed down and entered in the soil body, press down after 2000mm, steel casing is set in aperture, prevent orifice deformation, ensure that active material pile body 14 is shaped.While pressing to geotechnological cloth bag 4 sack height, time-out presses down, and geotechnological cloth bag 4 sacks are upwards promoted to 1 ~ 2 latticed hoop constraint body 5 horizontal grid place height in road temporary fixed, pours into active material 14 by batch meter or high-pressure pump in geotechnological cloth bag 4.After filling, can again start sinking apparatus, by mechanical oscillation, make active material 14 vibratory compactions, again sink down into after geotechnological cloth bag 4 sack height, promote equally sack, pour into active material 14.By that analogy, until pile sinking is to designing bottom surface absolute altitude, last feed supplement compacting.
Finally, active material 14 continues to absorb the stake side soil body 15 interior moisture, and (pile body presses down in process, absorb the moisture in a part of soil body or slurry coat method), through fully forming active material pile body 2 after aquation, be wrapped in pile for prestressed pipe 1 outward, and because hydration swelling effect and geotechnological cloth bag 4 and wrapping up in of obligatory point 5 are tied up, forming block-like protrusions 6, extruding enters in a side soil body 15.Implement pile body described in the utility model by above-mentioned construction method, not only improved that pile body is vertical, level and anti-seismic performance and endurance quality, and can accelerate soil solidifying, improve side friction, realize the utility model object.
Fig. 4 is the construction process schematic diagram of the utility model outsourcing active material pile body pile for prestressed pipe, and as shown in Figure 4, its construction method mainly comprises the following steps:
1) preparation of construction: make required prefabricated expansion pile top 7, ring-stiffened body 2 and latticed hoop constraint body 5 according to designing requirement, sew up geotechnological cloth bag 4, and place is peaceful, machinery is marched into the arena;
2) pile body combination: pile for prestressed pipe 1 end connects prefabricated expansion pile top 7, be socketed according to this ring-stiffened body 2 in pile tube outside, geotechnological cloth bag 4(is folding) and latticed hoop constraint body 5, and be individually fixed on precast pile tip 7;
3) bore and scrape out hole: utilize machinery to form and plants a vestibule, can carry out mud off, bury if desired casing underground, vestibule diameter is determined according to pile for prestressed pipe 1 external diameter, guaranteeing that prefabricated expansion pile top 7 presses down can reaming;
4) pile body presses down: during the pile body after combination is pressed in hole, while pressing down, should keep pile body straight down;
5) pour into active material: pile body presses down piecemeal, progressively launch, promote geotechnological cloth bag 4, and gradation pours into graininess active material 14 in geotechnological cloth bag 4 simultaneously;
6) preliminary pile: treat that pile for prestressed pipe 1 presses to design bottom surface absolute altitude, the full active material 14 of geotechnological cloth bag 4 Synchronous lifting top sets perfusion;
7) pile body expansion: after active material 14 fully absorbs the interior moisture of the stake side soil body 15 or mud, aquation also expands forms block-like protrusions 6 under geotechnological cloth bag 4 and 5 constraints of latticed hoop constraint body.
Claims (7)
1. a pile for prestressed pipe for outsourcing active material pile body, is characterized in that the long outsourcing geotechnique of the full stake of pile for prestressed pipe cloth bag, and stake bottom is provided with prefabricated expansion pile top, and the bottom binding of geotechnological cloth bag is fixed on prefabricated expansion pile top; In geotechnique's cloth bag, ring-stiffened body is set, ring-stiffened body bottom is fixedly connected with dowel in prefabricated expansion pile top; The outer latticed hoop constraint body of lock ring of geotechnique's cloth bag, is filled with active material between pile for prestressed pipe and geotechnological cloth bag, after active material imbibition, is tightly strangled formation block-like protrusions by latticed hoop constraint body.
2. the pile for prestressed pipe of outsourcing active material pile body according to claim 1, it is characterized in that described geotechnological cloth bag is formed by the stitching of anti-filter geotextiles, it is cylindric that entirety is, and diameter is 1.10 ~ 1.25 times of pile for prestressed pipe external diameter, and be not less than prefabricated expansion pile top maximum outside diameter.
3. the pile for prestressed pipe of outsourcing active material pile body according to claim 1, is characterized in that described ring-stiffened body adopts reinforcing bar or steel moulding material to make, and is arranged at pile for prestressed pipe and geotechnological cloth bag encloses in the space forming.
4. the pile for prestressed pipe of outsourcing active material pile body according to claim 1, is characterized in that described latticed hoop constraint body adopts tabular steel to mould grid and makes, and for cylindric, diameter is identical with expansion pile top maximum outside diameter.
5. the pile for prestressed pipe of outsourcing active material pile body according to claim 1, is characterized in that described active material is combined by design proportioning by lime, flyash and slag, and active material absorbs stake side moisture, and slurry becomes outsourcing active material pile body admittedly.
6. the pile for prestressed pipe of outsourcing active material pile body according to claim 1, is characterized in that described block-like protrusions maximum outside diameter is greater than prefabricated expansion pile top maximum outside diameter, utilizes discrete material hydration swelling to be squeezed in a side soil body.
7. the pile for prestressed pipe of outsourcing active material pile body according to claim 1, is characterized in that, described prefabricated expansion pile top is made up of enlarged footing and connected unit, adopts reinforcing bar and concrete monobloc cast to form, and entirety is sealing pile top; Enlarged footing maximum external diameter is pile for prestressed pipe 1.05 ~ 1.20 times, lower diameter is dwindled gradually; Connected unit is cylindric, height 300 ~ 500mm, and upper surface is planted dowel in advance, and side is provided with embedded groove, and inner reserved vestibule is pile tube patchhole.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104005404A (en) * | 2014-05-16 | 2014-08-27 | 杭州江润科技有限公司 | Prestressed pipe pile coated with active material pile body and construction method |
| CN105350533A (en) * | 2015-12-04 | 2016-02-24 | 中铁第四勘察设计院集团有限公司 | Novel deep soft soil foundation strengthening pile |
| CN107938665A (en) * | 2017-11-30 | 2018-04-20 | 嘉兴龙鼎大型混凝土构件有限公司 | A kind of pretensioned prestressing high-performance concrete pipe pile |
| CN109113058A (en) * | 2018-08-15 | 2019-01-01 | 绿山高科建设科技有限公司 | A kind of new type cement soil composite pile |
| CN109868807A (en) * | 2019-03-13 | 2019-06-11 | 岩土科技股份有限公司 | A kind of expansion Pulling-Resistant Anchor Rod stake suitable for weak soil and loose ground |
| CN110593280A (en) * | 2019-08-30 | 2019-12-20 | 河海大学 | Sap concrete anti-skidding expansion pile for slope reinforcement and construction method thereof |
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| CN107938665A (en) * | 2017-11-30 | 2018-04-20 | 嘉兴龙鼎大型混凝土构件有限公司 | A kind of pretensioned prestressing high-performance concrete pipe pile |
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| CN109868807A (en) * | 2019-03-13 | 2019-06-11 | 岩土科技股份有限公司 | A kind of expansion Pulling-Resistant Anchor Rod stake suitable for weak soil and loose ground |
| CN110593280A (en) * | 2019-08-30 | 2019-12-20 | 河海大学 | Sap concrete anti-skidding expansion pile for slope reinforcement and construction method thereof |
| CN110700240A (en) * | 2019-09-27 | 2020-01-17 | 中国一冶集团有限公司 | Grouting tubular pile and construction method thereof |
| CN115324033A (en) * | 2022-08-16 | 2022-11-11 | 中天建设集团有限公司 | Precast tubular pile construction method based on built-in high-expansion material self-expansion pile shoe structure |
| CN115324033B (en) * | 2022-08-16 | 2024-04-12 | 中天建设集团有限公司 | Prefabricated pipe pile construction method based on built-in high-expansion material self-expanding pile shoe structure |
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