CN101974905A - Pile-embedding method for hollow pile and auger drill for implementing same - Google Patents
Pile-embedding method for hollow pile and auger drill for implementing same Download PDFInfo
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- CN101974905A CN101974905A CN 201010515147 CN201010515147A CN101974905A CN 101974905 A CN101974905 A CN 101974905A CN 201010515147 CN201010515147 CN 201010515147 CN 201010515147 A CN201010515147 A CN 201010515147A CN 101974905 A CN101974905 A CN 101974905A
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Abstract
The invention relates to a pile-embedding method for a hollow pile. The pile-embedding method comprises the following steps of: hoisting the hollow pile to a pile-embedding position and hanging the hollow pile vertical to the ground; penetrating a central through hole of the hollow pile from top to bottom by using an auger drill with a reamer bit to reach the ground and starting to drill and carry soil; after the reamer bit is extended to the underground, carrying soil and expanding the reamer bit at the same time; along with the deep penetration of the drilling and soil-carrying operation, conveying the soil by using the auger drill; and embedding the hollow pile into the drill hole gradually until the hollow pile reaches to the set depth. The invention also provides the auger drill for implementing the pile-embedding method. Due to the construction by the auger drilling, soil-carrying and pile-embedding method, the problems of difficult soil extrusion in the pile-embedding process and difficult pile-embedding operation on hard-soil foundation can be solved; the project schedule is accelerated; the quality of the pile body is guaranteed; and adverse influence of construction on the ambient environment is reduced to a maximum degree.
Description
Technical field
The invention belongs to the realm of building construction, relate to the auger that the building pile foundation site operation is planted piling method and implemented this method, this method can effectively solve problems such as soil compaction effect, pan soil matter, noise, environment pollution.
Background technology
At present at the construction field (site), planting a mode mainly is hammering and static pressure.Stake is planted in hammering, static pressure method is planted the model that the condition that all will consider the ground soil property is selected finished peg for use.
(comprise immersed tube and tube drawing) in traditional work progress because the exciting of stake machine makes the soil body of stake point produce vibration, and be that medium is propagated to periphery, thereby excite the vibrations of surrounding building with the soil body.When vibrations surpass certain limit, will have a negative impact to surrounding environment, jeopardize the stability and security of surrounding buildings thing and underground pipeline facility etc., disturb resident's operate as normal and life, and may cause some contradictions, construction costs and progress are caused adverse effect.
When silent piling, pile body is by in the rapid injection soil, pile peripheral earth is extruded simultaneously, when the direct impact force to the soil body of stake point substantially exceeds soil body ultimate strength, the power of original balance system promptly destroys in the pile peripheral earth, cause the new balance after total stress increases in the soil, and this total stress almost all is converted into pore water pressure, form excess pore water pressure, according to the actual test result in scene, this excess pore water pressure value can reach heavy 2～4 times of upper strata earthing, the soil body is under this pressure effect, produce vertically upward the protuberance displacement and the soil compaction displacement of horizontal direction, land movement and horizontal range that excess pore water pressure causes are inversely proportional to, and are directly proportional with vertical depth.Because the transmission coefficient in the saturated clay is very little, excess pore water pressure dissipates very slow, reaches the several months sometimes.Adjacent building in the excess pore water pressure influence basin, structure and underground utilities, owing to the displacement deformation of the vertical protuberance of basic earth and side direction soil compaction causes damaging, and distance is nearer, and harm is bigger.
Summary of the invention
The technical problem to be solved in the present invention provides planting piling method and implementing the auger of this method of a kind of hollow pile, to reduce or to avoid problem noted earlier.
A kind of hollow pile of the present invention plant piling method, this hollow pile has a central through hole along its length direction, this method comprises the steps:
Described hollow pile is lifted on plants a position and vertically be suspended on the ground;
The auger that will have reaming bit penetrates the central through hole of described hollow pile from top to bottom and arrives at ground and begins boring extracting soil, and reaming bit was in and closed up state this moment;
After described reaming bit stretches into underground, in the operation of fetching earth, launch described reaming bit, described reaming bit launches the vertical outline of the diameter of back boring greater than described hollow pile;
Along with boring extracting soil deepens continuously, the soil that drills through is along with auger is carried up, with described hollow pile gradually in the implant bore, till described hollow pile reaches set depth.
Preferably, after described hollow pile reaches set depth, build enlarged footing in described foot of hole injection by the hollow drill pipe of described auger.
Preferably, after described enlarged footing was built and finished, the hollow drill pipe gunite in the central through hole of described boring and described hollow pile by described auger reached until cement paste till the height of setting, promotes auger afterwards.
Preferably, water filling in the central through hole of hollow pile in the process that described auger promotes.
Preferably, the pile extension step that further comprises many hollow piles in the process planting of described hollow pile.
Above-mentioned hollow pile preferably passes through the heating and cooling surface maintenance, concrete grammar is as follows: surface conditioning agent of the present invention is coated on interior recess, leave standstill 16-18 hour (preferred 17 hours), programming rate be 15～35 ℃/h (preferred 25 ℃/h), constant temperature phase temperature range is 85～95 ℃ (preferred 90 ℃), constant temperature time 13～15 hours (preferred 14 hours), cooling rate be 10～30 ℃/h (preferred 20 ℃/h); Wherein,
The preferred by weight proportioning of described surface conditioning agent dry weight component is: 0.005 part of cellulose ether, 0.01 part in methyl hydroxyethylcellulose ether, 15 parts of sodium alginates, 5 parts of DBSAs, 3 parts of sulfo-succinic acids, 7 parts in graphite, 100 parts of inserts French chalk add 1～2 times of mixing and stirring of water by mixed weight portion.
Coating thickness should be basic demand can cover the surface fully, and the thickness of coating is no more than 1 centimetre, and preferred thickness is 0.1-0.3 centimetre.The source is business procurement, and commercial grade can reach requirement of the present invention, and above-mentioned component all comes from commercial the purchase and obtains.
Deployable and the close up reaming bit that above-mentioned auger comprises the drilling rod of a hollow and is arranged at described drill rod end.
Above-mentioned reaming bit comprises a rigid connector that is fixedly connected on described drilling rod end, a mobilizable nonrigid connector, an oil cylinder, a plurality of curved booms, a plurality of straight-arms and a drill bit of fixedlying connected with described oil cylinder; Wherein, an end of described straight-arm connects described rigid connector, and the middle part of described straight-arm connects described nonrigid connector by described curved boom; Described nonrigid connector is enclosed within the outside of described oil cylinder and can drives it by described oil cylinder and moves up and down.
Above-mentioned drill bit is a hollow structure, is evenly distributed with a plurality of spray-holes around described drill bit.
Above-mentioned oil cylinder comprises a cylinder body and an extrusome, has a hollow aperture in the middle of described cylinder body and the described extrusome, and described nonrigid connector is enclosed within on the described extrusome, and fixedlys connected with described extrusome;
Wherein, described oil cylinder outer setting has an oil cylinder protective cover; described oil cylinder protective cover has the space of a spill; its center has a pod apertures; the inwall of described pod apertures can stretch in the through hole of described oil cylinder; described oil cylinder protective cover is fixedlyed connected with the cylinder body of described oil cylinder, and the described oil cylinder protective cover outside has flange, and described flange is fixedlyed connected with described rigid connector.
Be described in detail as follows:
For solving the problems of the technologies described above, the present invention proposes a kind of piling method of planting of hollow pile, this hollow pile has a central through hole along its length direction, and this method comprises the steps:
Described hollow pile is lifted on plants a position and vertically be suspended on the ground;
The auger that will have reaming bit penetrates the central through hole of described hollow pile from top to bottom and arrives at ground and begins boring extracting soil, and reaming bit was in and closed up state this moment;
After described reaming bit stretches into underground, in the operation of fetching earth, launch described reaming bit, described reaming bit launches the vertical outline of the diameter of back boring greater than described hollow pile;
Along with boring extracting soil deepens continuously, the soil that drills through is along with auger is carried up, with described hollow pile gradually in the implant bore, till described hollow pile reaches set depth.
Preferably, after described hollow pile reaches set depth, build enlarged footing in described foot of hole injection by the hollow drill pipe of described auger.
Preferably, after described enlarged footing was built and finished, the hollow drill pipe gunite in the central through hole of described boring and described hollow pile by described auger reached until cement paste till the height of setting, promotes auger afterwards.
Preferably, water filling in the central through hole of hollow pile in the process that described auger promotes.
Preferably, the pile extension step that further comprises many hollow piles in the process planting of described hollow pile.
The present invention also provides a kind of auger that this plants piling method of implementing, deployable and the close up reaming bit that described auger comprises the drilling rod of a hollow and is arranged at described drill rod end.
Preferably, described reaming bit comprises a rigid connector that is fixedly connected on described drilling rod end, a mobilizable nonrigid connector, an oil cylinder, a plurality of curved booms, a plurality of straight-arms and a drill bit of fixedlying connected with described oil cylinder; Wherein, an end of described straight-arm connects described rigid connector, and the middle part of described straight-arm connects described nonrigid connector by described curved boom; Described nonrigid connector is enclosed within the outside of described oil cylinder and can drives it by described oil cylinder and moves up and down.
Preferably, described drill bit is a hollow structure, is evenly distributed with a plurality of spray-holes around described drill bit.
Preferably, described oil cylinder comprises a cylinder body and an extrusome, has a hollow aperture in the middle of described cylinder body and the described extrusome, and described nonrigid connector is enclosed within on the described extrusome, and fixedlys connected with described extrusome.
Preferably; described oil cylinder outer setting has an oil cylinder protective cover; described oil cylinder protective cover has the space of a spill; its center has a pod apertures; the inwall of described pod apertures can stretch in the through hole of described oil cylinder; described oil cylinder protective cover is fixedlyed connected with the cylinder body of described oil cylinder, and the described oil cylinder protective cover outside has flange, and described flange is fixedlyed connected with described rigid connector.
Adopt auger boring of the present invention to fetch earth to plant the piling method construction can solve to plant in the process soil compaction and pan soil quality base to plant a difficult problem, speed up the work, guarantee pile quality, minimizing is constructed to the adverse effect of surrounding environment to greatest extent.
The piling method easy construction of planting of the present invention; processing ease; and will squeeze the soil stake and be improved as the low soil stake of squeezing; reduce super interstitial hydraulic pressure rising and soil body protuberance and displacement; thereby got rid of when planting adjacent structure; road; harmful effects such as structure; revolve and dig brill and can reduce the reaming coefficient; be adapted to soil layer and soft rock; solved the difficulty of construction under the specified conditions that pass through hard folder soil layer etc.; the external protection of the slurry of pressure injection formation simultaneously can strengthen the shearing resistance of finished peg; anti-impact force; high-durability; performances such as friction factor are used the useless slurry in the finished peg production, the secondary pollution that does not produce muddy water.
Description of drawings
The following drawings only is intended to the present invention done and schematically illustrates and explain, not delimit the scope of the invention.Wherein,
Fig. 1 shows is the enforcement schematic diagram of planting piling method according to a kind of hollow pile of a specific embodiment of the present invention;
Fig. 2 shows is decomposition diagram according to the auger of a specific embodiment of the present invention;
What Fig. 3 showed is the decomposition diagram of the reaming bit among Fig. 2;
Fig. 4 shows is use figure under the auger rounding state shown in Figure 2;
Fig. 5 shows is use figure under the auger deployed condition shown in Figure 2;
What Fig. 6 showed is the sectional view of oil cylinder protective cover shown in Figure 2;
What Fig. 7 showed is the sectional view of drill bit shown in Figure 2.
The specific embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast description of drawings the specific embodiment of the present invention.Wherein, identical parts adopt identical label.
Fig. 1 shows is the enforcement schematic diagram of planting piling method according to a kind of hollow pile of a specific embodiment of the present invention, as shown in the figure, the piling method of planting according to the present invention is primarily aimed at hollow pile and implements, wherein, this hollow pile 1 has a central through hole 11 along its length direction, hollow pile shown in the figure 1 is a hollow square pile, certainly, those skilled in the art are to be understood that, this hollow pile 1 can also be a kind of pile tube, perhaps can be the hollow pile of any one section form, special-shaped hollow pile etc. for example.
The piling method of planting of the present invention comprises the steps:
The fixed stake of setting-out position is accurately reserved the stake position and is put a site in the job site of smooth densification, carry out sign.Hollow pile 1 is lifted on plants a position and vertically being suspended on the ground.
The auger 2 that will have reaming bit 21 penetrates the central through hole 11 of hollow pile 1 from top to bottom and arrives at ground and begins boring extracting soil, and reaming bit was in and closed up state this moment.The auger of herein using with reaming bit 21 2 can be any auger that can be used for ream operation.
After reaming bit 21 stretches into underground, in the operation of fetching earth, launch reaming bit 21, as shown in Figure 1, at this moment, reaming bit 21 launches the vertical outline of the diameter of back boring 3 greater than hollow pile 1.
Along with boring extracting soil deepens continuously, the soil that drills through is along with auger 2 is carried, with hollow pile 2 gradually in the implant bore 3, till hollow pile 2 reaches set depth, promptly boring extracting soil with plant a step and carry out simultaneously.
In another specific embodiment of the present invention, can after 2 constructions of first hollow pile, hang in second hollow pile, the two is connect to obtain the hollow pile of Len req.
In addition, after the degree of depth that gets into design, stop, shrinking reaming bit 21, measure hole depth, aperture, confirm that the stake point reaches design elevation.After the prescribed depth of the most advanced and sophisticated arrival of stake supporting layer, can also further carry out the build of enlarged footing.For example, can spray the build enlarged footing in boring 3 bottoms by the hollow drill pipe of auger 2.Certainly, it will be appreciated by those skilled in the art that also and can after boring, auger 2 be taken out, utilize other instrument to build enlarged footing then.In a specific embodiment, can go out water under high pressure from the two-way nozzle ejection of auger, carry out the excavation of supporting layer, the rotation of auger switches to low speed, make root fixer (cement paste) from the both direction high-pressure injection, promote auger simultaneously lentamente, build enlarged footing.Then the also gunite in the hollow part of hollow pile till the height of regulation, promotes auger, the end of job that the napiform root at the most advanced and sophisticated position of stake is built.Fixedly starchization by spray at the most advanced and sophisticated position of stake fuses pile body and enlarged footing, thereby obtains bigger holding power.
Further, can also inject deployed mud, it be mixed, with remaining earth material until specified altitude by the pile-end pressure grouting technology.Slip casing by pressure can make slurry be enclosed in the hollow part and the external surface of finished peg, and stir repeatedly on marginal not slurry limit, treats cement paste setting and hardening gradually, to improve the bearing capacity and the erosion-resisting ability of shock resistance of stake.Mud also can adopt the useless slurry in the process that manufactures a finished product, and has not only solved useless slurry pollution problems and can also save departmental cost.
Cause spherical support end structural damage for avoiding underground water to enter central through hole under pressure, the limit is toward the water filling of central through hole internal diameter, and the limit promotes auger, and construction finishes.
Do not rise in the central through hole simultaneously in the cement paste of sclerosis fully for avoiding underground water in the soil body to enter under pressure also, this process can cause spherical support end structural damage under effect of water pressure, therefore in central through hole water filling with the balance that keep-ups pressure.In addition, in the boring extracting soil process, should guarantee the verticality of holing, make hole body gradient in allowed band, to guarantee during pile extension that stake is on same axis up and down, joint connects and must require to carry out in strict accordance with operation, guarantees that pile driving pressure and stake end enter bearing stratum depth and all adhere to specification when planting.
The present invention also provides a kind of above-mentioned auger of planting piling method that is used to implement, as shown in Figure 2, its demonstration be decomposition diagram according to the auger 2 of a specific embodiment of the present invention, deployable and the close up reaming bit 21 that this auger 2 comprises the drilling rod 22 of a hollow and is arranged at drilling rod 22 ends.
What Fig. 3 showed is the amplification decomposition diagram of reaming bit 21, as shown in the figure, reaming bit 21 comprises a rigid connector 211 that is fixedly connected on drilling rod 22 ends by the bolt (not shown), a mobilizable nonrigid connector 213, an oil cylinder 212, a plurality of curved booms 214 and a plurality of straight-arm 215 and a drill bit 216 of fixedlying connected by the bolt (not shown) with described oil cylinder 212; Wherein, the number of curved boom 214 is the twice of the number of straight-arm 215; One end of described straight-arm 215 connects described rigid connector 211, and the middle part of described straight-arm 215 connects described nonrigid connector 213 by described curved boom 214; Described nonrigid connector 213 is enclosed within the outside of described oil cylinder 212 and can drives it by described oil cylinder 212 and moves up and down.
Specifically, comprise three shown in Fig. 3 around drill bit 216 equally distributed straight-arms 215,215 pairs of each straight-arms should have two curved booms 214 that are connected with its middle part.Drill bit 216 has three breach 2161 corresponding to the position at straight-arm 215 places, is used for when straight-arm 215 draws in 2161 (as shown in Figure 4) of retraction breach, to reduce the size of reaming bit 21 as far as possible.Straight-arm 215 is provided with a plurality of hocks that stretch out to the inside 2151, is used for improving when straight-arm 215 launches the cutting force to soil layer.
Drill bit 216 is used for excavating, and groundwork is broken stone, and drill bit is that alloy is made.Drill bit 216 is a hollow structure, is evenly distributed with a plurality of spray-holes 2162 around drill bit 216, is used for ejecting water under high pressure in the process of building enlarged footing, carries out the excavation of supporting layer.
Oil cylinder 212 is the vertically-displacable jack, and structure is identical with general oil cylinder, comprises a cylinder body 2121 and an extrusome 2122, has a hollow aperture 2123 in the middle of cylinder body 2121 and the extrusome 2122.Nonrigid connector 213 is enclosed within on the extrusome 2122 of oil cylinder 212, and fixedlys connected with extrusome 2122, and in a specific embodiment, nonrigid connector 213 welds together with extrusome 2122.
Cylinder body 2121 is arranged on the top of rigid connector 211, and the connector 211 that is fixed is sealed in the inside of drilling rod 22.Extrusome 2122 pass rigid connector 211 middle parts through hole 2111 and can telescopic moving in through hole 2111.
For protection oil cylinder 212 does not contact with cement etc., an oil cylinder protective cover 217 can also be set, in oil cylinder 212 outsides referring to Fig. 6 sectional view in drilling rod 22.Oil cylinder protective cover 217 has the space of a spill, and its center has a pod apertures 2171, and the inwall 2172 of pod apertures 2171 can stretch in the through hole 2123 of oil cylinder 212, and the movable part with protection oil cylinder 212 makes it not contact cement paste.After oil cylinder protective cover 217 covers on the oil cylinder 212, can oil cylinder protective cover 217 be fixedlyed connected with the cylinder body 2121 of oil cylinder 212 by modes such as welding.Oil cylinder protective cover 217 outsides have flange 2173, and flange perimeter has connecting hole 2174, are used for fixedlying connected with rigid connector 211 by bolt.On oil cylinder protective cover 217 outer walls oil pipe hole 2175 is set also.The oil pipe (not shown) of control oil cylinder 212 is passed and is passed oil pipe hole 2175 after the cavity of drilling rod 22 and link to each other with oil cylinder 212, with stretching by oil pipe control oil cylinder 212.Also be provided with the buckle of fixing described oil pipe in the cavity of drilling rod 22.
When using, as shown in Figure 4, extrusome 2122 withdrawals of oil cylinder 212 drive nonrigid connector 213 and move upward, and make straight-arm 215 draw in the breach 2161 by curved boom 214.When needs straight-arm 215 launched, the extrusome 2122 of oil cylinder 212 stretched out, and drove nonrigid connector 213 and moved downward, and launched thereby drive straight-arm 215 by curved boom 214.
In mining process,, can in boring 3, inject cement paste, inject high pressure water etc. by the drilling rod 22 of hollow, the pod apertures 2171 of oil cylinder protective cover 217, the through hole 2123 of oil cylinder 212 and the drill bit 216 of hollow.
The above only is the schematic specific embodiment of the present invention, is not in order to limit scope of the present invention.Any those skilled in the art, equivalent variations, the modification of being done under the prerequisite that does not break away from design of the present invention and principle and combining all should belong to the scope of protection of the invention.
Claims (10)
- A hollow pile plant piling method, this hollow pile has a central through hole along its length direction, this method comprises the steps:Described hollow pile is lifted on plants a position and vertically be suspended on the ground;The auger that will have reaming bit penetrates the central through hole of described hollow pile from top to bottom and arrives at ground and begins boring extracting soil, and reaming bit was in and closed up state this moment;After described reaming bit stretches into underground, in the operation of fetching earth, launch described reaming bit, described reaming bit launches the vertical outline of the diameter of back boring greater than described hollow pile;Along with boring extracting soil deepens continuously, the soil that drills through is along with auger is carried up, with described hollow pile gradually in the implant bore, till described hollow pile reaches set depth.
- 2. the piling method of planting according to claim 1 is characterized in that, after described hollow pile reaches set depth, builds enlarged footing by the hollow drill pipe of described auger in described foot of hole injection.
- 3. the piling method of planting according to claim 2, it is characterized in that, after described enlarged footing is built and finished, by hollow drill pipe gunite in the central through hole of described boring and described hollow pile of described auger, reach until cement paste till the height of setting, promote auger afterwards.
- 4. the piling method of planting according to claim 3 is characterized in that, water filling in the central through hole of hollow pile in the process that described auger promotes.
- 5. according to the described piling method of planting of one of claim 1-4, it is characterized in that the pile extension step that further comprises many hollow piles in the process planting of described hollow pile.
- 6. the piling method of planting according to claim 5, it is characterized in that, described hollow pile preferably passes through the heating and cooling surface maintenance, concrete grammar is as follows: surface conditioning agent of the present invention is coated on interior recess, leave standstill 16-18 hour (preferred 17 hours), programming rate be 15～35 ℃/h (preferred 25 ℃/h), constant temperature phase temperature range is 85～95 ℃ (preferred 90 ℃), constant temperature time 13～15 hours (preferred 14 hours), cooling rate be 10～30 ℃/h (preferred 20 ℃/h); Wherein,The preferred by weight proportioning of described surface conditioning agent dry weight component is: 0.005 part of cellulose ether, 0.01 part in methyl hydroxyethylcellulose ether, 15 parts of sodium alginates, 5 parts of DBSAs, 3 parts of sulfo-succinic acids, 7 parts in graphite, 100 parts of inserts French chalk add 1～2 times of mixing and stirring of water by mixed weight portion.Coating thickness should be basic demand can cover the surface fully, and the thickness of coating is no more than 1 centimetre, and preferred thickness is 0.1-0.3 centimetre.The source is business procurement, and commercial grade can reach requirement of the present invention, and above-mentioned component all comes from commercial the purchase and obtains.
- 7. implement the described auger of planting piling method of one of claim 1-5 for one kind, it is characterized in that, deployable and the close up reaming bit that described auger comprises the drilling rod of a hollow and is arranged at described drill rod end.
- 8. auger according to claim 6 is characterized in that, described reaming bit comprises a rigid connector that is fixedly connected on described drilling rod end, a mobilizable nonrigid connector, an oil cylinder, a plurality of curved booms, a plurality of straight-arms and a drill bit of fixedlying connected with described oil cylinder; Wherein, an end of described straight-arm connects described rigid connector, and the middle part of described straight-arm connects described nonrigid connector by described curved boom; Described nonrigid connector is enclosed within the outside of described oil cylinder and can drives it by described oil cylinder and moves up and down.
- 9. auger according to claim 7 is characterized in that, described drill bit is a hollow structure, is evenly distributed with a plurality of spray-holes around described drill bit.
- 10. auger according to claim 7, it is characterized in that described oil cylinder comprises a cylinder body and an extrusome, have a hollow aperture in the middle of described cylinder body and the described extrusome, described nonrigid connector is enclosed within on the described extrusome, and fixedlys connected with described extrusome;Wherein, described oil cylinder outer setting has an oil cylinder protective cover; described oil cylinder protective cover has the space of a spill; its center has a pod apertures; the inwall of described pod apertures can stretch in the through hole of described oil cylinder; described oil cylinder protective cover is fixedlyed connected with the cylinder body of described oil cylinder, and the described oil cylinder protective cover outside has flange, and described flange is fixedlyed connected with described rigid connector.
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| CN 201010515147 CN101974905B (en) | 2010-10-22 | 2010-10-22 | Pile-embedding method for hollow pile and auger drill for implementing same |
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| CN102373708A (en) * | 2011-02-23 | 2012-03-14 | 上海城地建设发展有限公司 | Pile sinking device and method for middle digging pulling-anchoring method pre-stressed centrifugal pipe pile (square pile) |
| CN102383429A (en) * | 2011-01-18 | 2012-03-21 | 上海城地建设发展有限公司 | Device for sinking pile while digging soil in center of large-diameter pipe pile and use method thereof |
| CN103243713A (en) * | 2013-05-07 | 2013-08-14 | 天津建城基业集团有限公司 | Method for planting prestressed pipe pile at one step |
| JP2016048012A (en) * | 2014-08-28 | 2016-04-07 | 株式会社技研製作所 | Square columnar pile |
| CN106245528A (en) * | 2016-08-17 | 2016-12-21 | 王文龙 | Detritus cutter |
| CN112343501A (en) * | 2020-11-04 | 2021-02-09 | 张静 | Pile driver is used in road bridge construction |
| CN115125942A (en) * | 2022-07-22 | 2022-09-30 | 广东省源天工程有限公司 | Steel-pipe pile foundation strengthening mechanism |
| CN115191207A (en) * | 2022-08-25 | 2022-10-18 | 东北电力大学 | Integrated multi-functional full-automatic running gear who plants trees |
| CN117108207A (en) * | 2023-10-24 | 2023-11-24 | 烟台鲁东勘察测绘有限公司 | Automatic reaming device for geotechnical engineering investigation |
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