CN109736303A - It is a kind of to press pour water soil static pressure pipe pile structure and construction method - Google Patents
It is a kind of to press pour water soil static pressure pipe pile structure and construction method Download PDFInfo
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- CN109736303A CN109736303A CN201910033286.6A CN201910033286A CN109736303A CN 109736303 A CN109736303 A CN 109736303A CN 201910033286 A CN201910033286 A CN 201910033286A CN 109736303 A CN109736303 A CN 109736303A
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- 239000002689 soil Substances 0.000 title claims abstract description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000010276 construction Methods 0.000 title claims abstract description 40
- 230000003068 static effect Effects 0.000 title claims abstract description 28
- 239000004568 cement Substances 0.000 claims abstract description 72
- 230000002787 reinforcement Effects 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims abstract description 4
- 238000005553 drilling Methods 0.000 claims description 19
- 230000000996 additive effect Effects 0.000 claims description 9
- 239000010881 fly ash Substances 0.000 claims description 9
- 239000000654 additive Substances 0.000 claims description 8
- 239000011440 grout Substances 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 239000010813 municipal solid waste Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005429 filling process Methods 0.000 claims description 3
- 239000003673 groundwater Substances 0.000 claims description 3
- 239000003864 humus Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 17
- 238000002156 mixing Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 5
- 238000010008 shearing Methods 0.000 abstract description 5
- 230000007812 deficiency Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- KQTVWCSONPJJPE-UHFFFAOYSA-N etridiazole Chemical compound CCOC1=NC(C(Cl)(Cl)Cl)=NS1 KQTVWCSONPJJPE-UHFFFAOYSA-N 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- -1 rubble Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Abstract
It is a kind of to press pour water soil static pressure pipe pile structure and construction method, belong to building lot structure and construction method technical field, for improving strength of the mixing pile, vertical bearing capacity, bending resistance, tension and shearing strength, to improve consolidated subsoil ability.Its technical solution is: tubular pole is disposed vertically, and locator is the frame of reinforcement welding, and retainer rings are wound on tubular pole bottom, and locator and tubular pole outer wall are welded to connect, and cement earth pile is looped around tubular pole periphery, and the diameter of cement earth pile is one times or more of tubular pole diameter.The present invention solves various bearing piles itself and the deficiency of construction in existing basement process, pressure pours water soil static pressure pipe pile structure and construction method can effectively improve strength of the mixing pile and vertical bearing capacity, bending resistance, tension and shearing strength with higher, to greatly improve consolidated subsoil ability, it is adapted to the basement process requirement of a variety of geological conditions, facilitate construction simultaneously, cost can be effectively reduced, meeting environmental requirements, there is extensive popularizing value.
Description
Technical field
The present invention relates to a kind of tube pile structure of building lot and construction methods, belong to building lot structure and construction method
Technical field.
Background technique
Currently, with the implementation of a large amount of various capital construction projects, industrial project, under a variety of different geological conditions
Carrying out foundation construction becomes the normality of building trade.The different constraints of geological conditions and ground environment and making for building
Type design all brings new challenge to basement process.Existing frequently-used method for processing foundation has: cement mixing method, compacting water
Soil stake, lime-soil compaction pile, prefabricated tubular pile, cement fly ash gravel pile (CFG) etc..
The construction is simple, cheap of cement mixing method, rammed concrete pile and lime-soil compaction pile, but pile strength compared with
It is low, it is limited to improve foundation bearing capacity ability, and can not bear to shear, is easy to produce moderate finite deformation and destruction.
Cement fly ash gravel pile adds water to mix and stir by cement, flyash, rubble, aggregate chips or sand, with inter-pile soil, mattress
Layer composite foundation is collectively formed, have easy construction, noise is low, progress is fast, Bearing Capacity of Composite Foundation is higher, can Reducing distortion,
Pile body the advantages that arrangement of reinforcement project cost is not lower.But pile quality is not easily controlled, and is easy to appear pile deflection, is altered hole, necking down, stake
Body adds mud, broken pile and other issues, and the mechanical influence constructed is larger, and frequent occurrence situations such as plugging, drilling difficulty, pile body is not
The disadvantages of arrangement of reinforcement pile body horizontal resist forces are lower.
Prestressed pipe pile vertical carrying capacity is very high, and because it is prefabricated in the factory, pile quality is easily guaranteed that, and consumed reinforcing bar,
Concrete is saved a lot compared to cast-in-situ bored pile.Since pile body is furnished with reinforcing bar, pile body horizontal resist forces are stronger.Under heavily contaminated weather
It can construct, guarantee the duration.The construction method of tubular pole is generally static pressure method or hammering method, is suitable for soft layer.Encountering heavily fortified point
Pan soil, thick-layer sand, banket etc. geological conditions when, pile sinking is difficult, need to can construct by pilot hole, and to construction machinery require compared with
Height, while affecting again to bearing capacity.
Since common method for processing foundation used at present has respective deficiency, it designs a kind of with more high-strength
Degree and bearing capacity, easy for construction, low-cost bearing pile and construction method are very necessary.
Summary of the invention
Pour water soil static pressure pipe pile structure and construction method are pressed technical problem to be solved by the invention is to provide a kind of, this
Kind of [1] soil cement static pressure pipe pile structure and construction method can effectively improve strength of the mixing pile and vertical bearing capacity, have compared with
High bending resistance, tension and shearing strength, so that consolidated subsoil ability is greatly improved, meanwhile, have and facilitates construction, reduces cost
Advantage.
The technical solution for solving above-mentioned technical problem is:
A kind of to press soil static pressure pipe pile structure of pouring water, it includes pressing pour water soil stake, tubular pole, locator, and tubular pole is disposed vertically, fixed
Position device is the frame of reinforcement welding, and retainer rings are wound on tubular pole bottom, and locator and tubular pole outer wall are welded to connect, soil cement anchor ear
It is wound on tubular pole periphery, the diameter of cement earth pile is greater than tubular pole diameter 300mm or more.
Above-mentioned pressure is poured water soil static pressure pipe pile structure, and the cement earth pile is made of water, cement, soil and additive, wherein
The mass ratio of water, cement and soil is 0.45:0.2:1, and soil selects the scene soil without containing rubbish and organic matter, and additive is selected micro-
One or more of swelling agent, retardation water reducing agent, cellulose, flyash.
Above-mentioned pressure is poured water soil static pressure pipe pile structure, and the tubular pole is prefabricated tubular pile, and the section of tubular pole is circle.
Above-mentioned pressure is poured water soil static pressure pipe pile structure, and the locator is made of two circular planes and multiple pull rods, and two
A circular planes up and down place by parallel coaxial, and the excircle of two circular planes has more vertical steel bar rod connections, each
Circular planes are made of an outer toroid, an interior annular and an equilateral triangle, outer toroid and interior annular coaxial placement, inner circle
Ring is positive inscribed circle of a triangle, and the vertex of equilateral triangle and outer toroid are welded to connect, the equilateral triangle in two circular planes
Be staggeredly placed, two equilateral triangles in the horizontal plane be projected as regular hexagon, the diameters of two outer toroids and cement earth pile
Outer diameter is identical, and the diameter of two interior annulars and the outer diameter of tubular pole match, and the outer wall end plate of tubular pole and two interior annulars are welded
Connection.
A kind of above-mentioned pressure is poured water the construction method of soil static pressure pipe pile structure, it is carried out using following steps:
A. prepare before construction: surveying setting-out stake position first, then long-spiral drilling machine positions, and drilling machine carries out drilling construction afterwards in place,
Drilling depth and aperture are in strict accordance with pressing the design requirement for soil static pressure pipe pile of pouring water to execute, and the soil that pore-forming is dug out is it is noted that protect
Shield, to prepare cement grout；
B. prepare cement grout according to the ratio, wherein water: cement: soil=0.45:0.2:1 (mass ratio), additive can be according to water
Soil workability and construction requirement addition, such as micro-expanding agent, retardation water reducing agent, cellulose, flyash, scene use blender
It is mixed and stirred, Soil-cement side's amount will meet pile requirement；
C. tubular pole is prepared according to design requirement；
D. make locator, outer circle ring diameter and the bore diameter of locator match, the inner circle ring diameter of locator with
Tubular pole outer diameter matches, and locator and tubular pole are welded to connect；
E. [2] soil cement, the cement soil pressure mixed and stirred is filled into drilling, must not be interrupted in filling process, and pressure filling side, which is measured, is
Tubular pole volume is subtracted at pore volume, considers that soil cement loss preferably fits live soil property situation and increases groundwater increment；
F. tubular pole is installed and locator is hung down the tubular pole connected and locator with loop wheel machine before soil cement ot-yet-hardened
Straight cutting enters in soil cement, contacts locator periphery with hole wall, slowly sinks to, as difficult in sunk, can be in stake
Very useful vibrator auxiliary is sunk；When higher to requirement for bearing capacity, static pressure method can be used or hammering method auxiliary is sunk.
G. pile body is conserved, and curing time must not be less than 21 days, after pile body reaches intensity requirement, clips protection portion
The cement earth pile divided, place cleaning carry out detection test.
The beneficial effects of the present invention are:
The present invention increases tubular pole in cement earth pile, and tubular pole is controlled by locator and positioned, used with existing basement process each
Kind bearing pile, which compares, to be had the advantage that
(1) bearing capacity is high: increasing 4-5 times than light water soil stake, increases 20%-30% than tubular pole；
(2) pile strength is high: having prefabricated tubular pile in pile body, pile quality is easy to control, and increases pile body tension, bending resistance and shearing resistance
Intensity；
(3) easy for construction: special machine is not needed, construction can be completed using conventional mechanical, it is simple to operate；
(4) save material: compared with CFG traditional, due to the raising of bearing capacity, it is long and increase stake spacing to shorten stake, saving
Material；
(5) environmentally friendly: drilling, which is unearthed, prepares cement grout, dissolves almost without dregs, tubular pole be it is prefabricated free from environmental pollution, can be dirty in weight
It constructs under dye weather, guarantees the duration.
The present invention is initiating in capital construction field of foundation treatment, solves various bearing piles of existing basement process itself and applies
The deficiency of work.Pressure of the invention pours water soil static pressure pipe pile structure and construction method can effectively improve strength of the mixing pile and vertical
Bearing capacity, bending resistance, tension and shearing strength with higher are adapted to a variety ofly to greatly improve consolidated subsoil ability
The basement process requirement of matter condition, while facilitating construction, cost can be effectively reduced, it meets environmental requirements, in industry has
Extensive popularizing value.
Detailed description of the invention
Fig. 1 is that pressure of the invention is poured water the structural schematic diagram of soil static pressure pipe pile；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is locator structure schematic diagram；
Fig. 4 is construction method process flow chart of the invention.
It is marked in figure as follows: cement earth pile 1, tubular pole 2, locator 3, outer toroid 4, interior annular 5, steel bar rod 6, positive triangle
Shape 7.
Specific embodiment
Pressure of the invention soil static pressure pipe pile of pouring water is made of cement earth pile 1, tubular pole 2, locator 3.
Fig. 1,2 displays, pressing the outside for soil static pressure pipe pile of pouring water is cement earth pile 1, and tubular pole 2 is located in cement earth pile 1, with
The casting of cement earth pile 1 is integrated, and locator 3 is looped around 2 bottom of tubular pole, and locator 3 and 2 outer wall of tubular pole are welded to connect.
Cement earth pile 1 is made of water, cement, soil and additive, and wherein the mass ratio of water, cement and soil is 0.45 to 0.2
Than 1, soil selects the scene soil without containing rubbish and humus, and additive can be added according to soil cement workability and construction requirement,
Such as micro-expanding agent, retardation water reducing agent, cellulose, flyash.
Tubular pole 2 is circular cross-section, and specific surface area is maximum, and the side friction provided is maximum.1 diameter of cement earth pile is tubular pole
2 diameters are greater than 3000mm or more, to guarantee that soil cement can provide shaft resistance, i.e., do not occur soil cement and tubular pole section is broken
Bad situation.
Peripheral cement earth pile 1 is flush to prefabricated tubular pile 2, to guarantee soil cement 1 and the common bearing load of tubular pole 2, guarantees stake
Body total quality is also beneficial to protect pile body when construction in later period.
Fig. 2,3 displays, 3 outer diameter of locator are close to stake holes side wall, and internal diameter welds together with prefabricated tubular pile 2, and locator 3 is high
It spends consistent with 2 end plate height of tubular pole.
Locator 3 is made of two circular planes and multiple pull rods 6, and two circular planes up and down place by parallel coaxial, and two
The excircle of a circular planes has more vertical steel bar rods 6 to connect.Each circular planes are by one outer toroid 4, one
Annulus 5 and an equilateral triangle 7 form, and 5 coaxial placement of outer toroid 4 and interior annular, interior annular 5 is the inscribed circle of equilateral triangle 7
It is welded to connect, the vertex of equilateral triangle 7 and outer toroid 4 are welded to connect.
Equilateral triangle 7 in two circular planes is staggeredly placed, and the projection of two equilateral triangles 7 in the horizontal plane is positive six
It is angular.
The diameter of two outer toroids 4 is identical as the outer diameter of cement earth pile 1, the diameter of two interior annulars 5 and the outer diameter of tubular pole 2
Match, the outer wall of tubular pole 2 and two interior annulars 5 are welded to connect.
Pressure of the invention is poured water the construction method of soil static pressure pipe pile structure, it is carried out using following steps:
A. prepare before construction: surveying setting-out stake position first, then long-spiral drilling machine positions, and drilling machine carries out drilling construction afterwards in place,
Drilling depth and aperture are in strict accordance with pressing the design requirement for soil static pressure pipe pile of pouring water to execute, and the soil that pore-forming is dug out is it is noted that protect
Shield, to prepare cement grout；
B. prepare cement grout according to the ratio, wherein water: cement: soil=0.45:0.2:1 (mass ratio), additive can be according to water
Soil workability and construction requirement addition, such as micro-expanding agent, retardation water reducing agent, flyash, scene are mixed using blender
To meet pile requirement with, Soil-cement side amount；
C. tubular pole 2 is prepared according to design requirement；
D. locator 3 is made, 4 diameter of outer toroid of locator 3 matches with bore diameter, and the interior annular 5 of locator 3 is straight
Diameter matches with 2 outer diameter of tubular pole, and locator 3 and tubular pole 2 are welded to connect；
E. casting cement soil, the cement soil pressure mixed and stirred is filled into drilling, must not be interrupted in filling process, pressure the side of fillinging measure be at
Pore volume subtracts tubular pole volume, considers that soil cement loss preferably fits live soil property situation and increases groundwater increment；
F., tubular pole 2 and locator 3, before soil cement ot-yet-hardened, the tubular pole 2 and locator that will have been connected with loop wheel machine are installed
3 are inserted perpendicularly into soil cement, contact 3 periphery of locator with hole wall, slowly sink to, as difficult in sunk, can
It assists in stake top vibrator；
G. pile body is conserved, and curing time must not be less than 21 days, after pile body reaches intensity requirement, clips protection part
Cement earth pile, place cleaning carry out detection test.
One embodiment of the present of invention is as follows:
Certain engineering is constructed using the method, it is desirable that single pile vertical resistance pressure characteristic load bearing capacity >=1300kN.Water is selected by calculating
1 diameter of soil stake is 800mm, and 2 diameter of tubular pole is 500mm, the long 21m of stake.
Construction method:
The cement mixed weight of cement earth pile 1 is 20%, i.e., cement+a certain proportion of bentonite of live sand+20%, water: cement:
Soil=0.45:0.2:1 (mass ratio).
It is drilled by long-spiral drilling machine (model C FG30-800mm), is connect by conveying pipeline in drilling rod with ground pump, it will be preparatory
The soil cement mixed and stirred mixes and stirs material pressure and pours into hole.
Pile for prestressed pipe 2 uses PHC500AB100-10, and 9, it is selected from national standard drawings " prestressed concrete pipe pile ", pile body is mixed
The seepage-resistant grade for coagulating soil is not lower than P10, and mixes anti-corrosive rust inhibitor, and thickness of protection tier is not less than 35mm, using static pressure
Thin wall tubular pile machine press fitting, executes by related specifications when pipe pile joint welds
Locator 3 is formed by HRB400 reinforcement welding, bar diameter 20mm, 3 height 200mm of locator, the inner circle of locator 3
Ring diameter is 500mm, and outer circle ring diameter is 800mm.
Claims (5)
- The soil static pressure pipe pile structure 1. a kind of pressure is poured water, it is characterised in that: it includes pressing soil stake (1) of pouring water, tubular pole (2), determining Position device (3), tubular pole (2) is disposed vertically, locator 3() be reinforcement welding frame, locator (3) is looped around tubular pole (2) bottom, Locator (3) and tubular pole (2) outer wall are welded to connect, and cement earth pile (1) is looped around tubular pole (2) periphery, the diameter of cement earth pile (1) It is greater than 300mm or more for tubular pole (2) diameter.
- 2. pressure according to claim 1 is poured water soil static pressure pipe pile structure, it is characterised in that: the cement earth pile (1) by Water, cement, soil and additive composition, wherein the mass ratio of water, cement and soil is 0.5 to 0.2 to 1, and soil, which is selected, does not contain rubbish With the scene soil of humus, additive selects one or more of micro-expanding agent, retardation water reducing agent, flyash.
- The soil static pressure pipe pile structure 3. pressure according to claim 1 is poured water, it is characterised in that: the tubular pole (2) is prefabricated Tubular pole, the section of tubular pole (2) are circle.
- The soil static pressure pipe pile structure 4. pressure according to claim 1 is poured water, it is characterised in that: the locator (3) is by two A circular planes and multiple pull rods (6) composition, two circular planes up and down place by parallel coaxial, the excircle of two circular planes There are more vertical pull rod (6) connections, each circular planes are by an outer toroid (4), an interior annular (5) and a positive triangle Shape (7) composition, outer toroid (4) and interior annular (5) coaxial placement, interior annular (5) are that the inscribed circle of equilateral triangle (7) welds company It connecing, the vertex and outer toroid (4) of equilateral triangle (7) are welded to connect, and the equilateral triangle (7) in two circular planes is staggeredly placed, Two equilateral triangles (7) in the horizontal plane be projected as regular hexagon, the diameters of two outer toroids (4) and cement earth pile (1) Outer diameter is identical, and the outer diameter of the diameter and tubular pole (2) of two interior annulars (5) matches, the outer wall of tubular pole (2) and two interior annulars (5) it is welded to connect.
- 5. a kind of pressure using 4 any one of Claims 1-4 is poured water, the pressure of soil static pressure pipe pile structure is poured water soil static tube Pile construction method, it is characterised in that: it is carried out using following steps:A. prepare before construction: surveying setting-out stake position first, then long-spiral drilling machine positions, and drilling machine carries out drilling construction afterwards in place, Drilling depth and aperture are in strict accordance with pressing the design requirement for soil static pressure pipe pile of pouring water to execute, and the soil that pore-forming is dug out is it is noted that protect Shield, to prepare cement grout；B. cement grout is prepared according to the ratio, and wherein the mass ratio of water, cement and soil is 0.45:0.2:1, and soil is selected and do not contained The scene soil of rubbish and humus, additive select one or more of micro-expanding agent, retardation water reducing agent, flyash, scene It is mixed and stirred using blender, Soil-cement side's amount will meet pile requirement；C. tubular pole (2) are prepared according to design requirement；D. locator (3) are made, outer toroid (4) diameter of locator (3) matches with bore diameter, locator (3) Interior annular (5) diameter matches with tubular pole (2) outer diameter, and locator (3) and tubular pole (2) are welded to connect；E. casting cement soil, the cement soil pressure mixed and stirred is filled into drilling, must not be interrupted in filling process, pressure the side of fillinging measure be at Pore volume subtracts tubular pole (2) volume, considers that soil cement loss preferably fits live soil property situation and increases groundwater increment；F., tubular pole (2) and locator (3) are installed, before soil cement ot-yet-hardened, with loop wheel machine by the tubular pole connected (2) and Locator (3) is inserted perpendicularly into soil cement, is contacted locator (3) periphery with hole wall, is slowly sunk to, in case of under Heavy difficulty can assist in stake top vibrator；G. pile body is conserved, and curing time must not be less than 21 days, after pile body reaches intensity requirement, clips protection part Cement earth pile, place cleaning carry out detection test.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331722A (en) * | 2019-07-26 | 2019-10-15 | 中国兵器工业北方勘察设计研究院有限公司 | A kind of prefabricated pile static pressure construction positioning device and construction method |
| CN111058457A (en) * | 2019-12-13 | 2020-04-24 | 中冶天工集团有限公司 | Composite stirring pile with prefabricated reinforced concrete pipe pile inserted inside and construction method |
| CN112726582A (en) * | 2021-01-08 | 2021-04-30 | 中国建筑第二工程局有限公司 | PHC cement soil mixing composite pile construction process |
| CN114411712A (en) * | 2022-02-15 | 2022-04-29 | 浙江意力管业科技有限公司 | Static pressure tubular pile with high bearing capacity |
| CN115324281A (en) * | 2022-08-22 | 2022-11-11 | 华南理工大学 | Compacted confined cement column for resource utilization of engineering muck and construction method thereof |
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| CN209854709U (en) * | 2019-01-14 | 2019-12-27 | 中国兵器工业北方勘察设计研究院有限公司 | Pressure-grouting cement soil static pressure pipe pile structure |
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| CN112726582A (en) * | 2021-01-08 | 2021-04-30 | 中国建筑第二工程局有限公司 | PHC cement soil mixing composite pile construction process |
| CN114411712A (en) * | 2022-02-15 | 2022-04-29 | 浙江意力管业科技有限公司 | Static pressure tubular pile with high bearing capacity |
| CN114411712B (en) * | 2022-02-15 | 2024-01-23 | 浙江意力管业科技有限公司 | Static pressure tubular pile with high bearing capacity |
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