CN108252297B - A kind of anchor thorn bored concrete pile and its construction method - Google Patents
A kind of anchor thorn bored concrete pile and its construction method Download PDFInfo
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- CN108252297B CN108252297B CN201810054107.2A CN201810054107A CN108252297B CN 108252297 B CN108252297 B CN 108252297B CN 201810054107 A CN201810054107 A CN 201810054107A CN 108252297 B CN108252297 B CN 108252297B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
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- Engineering & Computer Science (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention provides a kind of anchor thorn bored concrete pile and its construction method, including pile body, back taper outside, interior back taper and hangnail, pile body one end is equipped with expansion arc, the side wall of pile body is equipped with through hole, hangnail is located in through hole, reinforcing bar is installed in the middle part of interior back taper, reinforcing bar one end is upward through pile body, the other end is connect with a back taper outside, it is moved upwards by outer back taper of reinforcing bar driving and interior back taper, deformation occurs and is inserted into the soil body for a back taper extrusion expansion section outside, the side wall that interior back taper extruding hangnail extends through pile body, which moves out, to be pierced into the soil body, further increase the bearing capacity and stability of anchor thorn bored concrete pile.Anchor thorn bored concrete pile of the present invention more commonly expands stake with bigger bearing capacity, it settles small, stability is good, construction is simple, the features such as low cost, it is suitble to the strengthening of foundation of the engineerings such as highway, dyke, house, the engineerings such as groynes protection, river protection against erosion, coastal waters hydrological observation, protection of landslide.
Description
Technical field
The present invention relates to a kind of anchor thorn bored concrete pile and its construction methods, belong to reinforcing soft foundation field.
Background technique
For a long time, the problem for the treatment of of soft foundation of highway and dyke is always extensive concern.Past often utilizes stake
Reinforcing soft foundation is carried out, but the stake in soft base only relies on frictional force in side-pile so the sedimentation of stake is big, the effect of this reinforcing soft foundation
And bad and cost is also high, difficulty of construction is also big.At the same time, under the overall background of " ocean power " strategy, coastal waters beach
Hydrological observation be protect Offshore Ecology environment an important means.But since the ground of coastal waters beach is soft, offshore beach is coated
Observation stake equally have sedimentation big, the problems such as wind and wave resistance, tidal competence are poor, and difficulty of construction is big.It can be seen that how inexpensive
Ground, easily, effectively improve bearing capacity and stability of the stake in soft base and have become a urgent problem,
Its meaning is self-evident.
Summary of the invention
Goal of the invention: the technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide one kind to lead to
Anchor after expansion twice and soft base firm connection pierces bored concrete pile, and the basis of the engineerings such as highway, dyke, house is suitble to add
Gu engineerings such as groynes protection, river protection against erosion, coastal waters hydrological observation, the protection of landslide.
The present invention also provides the construction methods of above-mentioned anchor thorn bored concrete pile.
In order to solve the above-mentioned technical problem, the invention discloses a kind of anchors to pierce bored concrete pile, including pile body, opens back taper outside, is interior
Back taper and hangnail are opened, described pile body one end is equipped with expansion arc, and the side wall of the pile body is equipped with through hole, and hangnail is located at through hole
It is interior；Reinforcing bar is installed in described in the middle part of back taper, reinforcing bar one end is upward through pile body, and the other end is connect with a back taper outside, passes through steel
Outer back taper of muscle driving and interior back taper are moved upwards into pile body, outside back taper extrusion expansion section its deformation occurs, make to expand
Duan Zhangkai is simultaneously inserted into inside soil body, and the side wall that interior back taper extruding hangnail extends through pile body is moved out and is pierced into the soil body
Portion, to further fix anchor thorn bored concrete pile.
Wherein, the hangnail is located at one end size inside pile body greater than through hole, and the other end is fixed after passing through through hole
Cutting ferrule is installed, prevents hangnail from falling during filling pile construction.
The outer back taper longitudinal section is isosceles trapezoid, and base diameter is greater than the initial diameter of expansion arc, top diameter
Less than expansion arc initial diameter；Back taper is the centrum on a pinnacle in described, and base diameter is less than two phases on pile body side wall
To the maximum distance between hangnail, that is, guarantee that an interior back taper can be pulled out out of pile body.
Described outer is equipped with a bolt clutch between back taper and interior back taper, the bolt clutch is a circle with the end
Ring, bottom are equipped with spring, and relative position is equipped with L-type card slot on ring wall；Card slot precession or back-out can be prolonged by being equipped in L-type card slot
Bolt；Reinforcing bar lower end connecting bolt opens back taper connecting bolt clutch bottom outside；Bolt prolongs to be entered at the top of L-type card slot, is then revolved
Turn and squeeze spring, be caught in L-type card slot bottom under the action of the spring, separate pressing spring at present and rotate, to screw out L-type card slot
It is simultaneously left at the top of L-type card slot bottom；Back taper and interior back taper separation will be opened outside by bolt clutch, thus individually will be interior
Back taper takes out inside pile body.
The expansion arc periphery is cased with a spring band, guarantees that expansion arc is indeformable in the process of sinking, does not expand, but works as
When carrying out expansion construction, due to the expansion of expansion arc, spring band is squeezed will automatic upward sliding.
The pile body is made of the above steel pipe connection of a section, and two adjacent section steel pipes are connected by steel bushing in pile body,
It is connected by the way of being welded using hickey or directly.
Counter-force lid and reaction frame are additionally provided at the top of the pile body, the counter-force is placed at the top of pile body, the reaction frame peace
End is covered loaded on counter-force, the chain block of connection reinforcing bar is equipped at the top of reaction frame.
Wherein, reaction plate that can be up and down is equipped in the middle part of the reaction frame, the reaction plate lower part is equipped with jack,
Top is equipped with the collet of fixed steel bars, and collet interior, which is equipped with, passes through vertical channel for reinforcing bar, and side, which is equipped with, can screw in compression reinforcing bar
Bolt.
Further, the optional hand jack of the jack or hydraulic jack are matched when selecting hydraulic jack
The standby power distribution cabinet for driving its load.
The construction method of above-mentioned anchor thorn bored concrete pile, includes the following steps:
S1, ground pore-forming: ground pore-forming is carried out in the way of the punching of shock and vibration, hammering or water；
S2, anchor thorn bored concrete pile production: hangnail is run through into side wall inside pile body, and is fixedly mounted in perforative external one end
Reinforcing bar is passed through interior back taper and connect with bolt by cutting ferrule, and a back taper is placed in below expansion arc and connect with bolt clutch bottom outside,
Bolt is caught in L-type card slot, and expansion arc periphery puts on spring band；
S3, judge whether to connect steel pipe as needed；
S31, direct pile sinking: if not needing to connect steel pipe, anchor thorn bored concrete pile is sent into pile sinking in pore-forming；
S32, adapter tube pile sinking: if desired connecing steel pipe, then by steel bushing joint steel pipe at the top of pile body, required for reaching
Pile body length, then by anchor thorn bored concrete pile be sent into pore-forming in pile sinking；
S4, expansion stake are promoted: after the completion of pile sinking, anchor thorn bored concrete pile being promoted 0.1~0.5m upwards；
S5, installation are mechanical: installing counter-force lid and reaction frame at the top of anchor thorn bored concrete pile, will pull calabash on reaction frame
Reed connects reinforcing bar；
S6, judge whether that jack is installed as needed；
S61, chain block drawing back taper: if not needing installation jack, by outside chain block drawing back taper and
Interior back taper；
S62, jack drawing back taper: if desired installing jack, then reaction plate, reaction plate lower part are installed on reaction frame
Jack is installed, top installation collet simultaneously fixes reinforcing bar, and jack driving reaction plate moves upwards, and passes through outside reinforcing bar drawing
Back taper and interior back taper；
S7, separation outer back taper and interior back taper: after expansion arc is fully expanded, simultaneously Swiveling Rebar is pushed, by bolt
It is screwed out from L-type card slot, separation outer back taper and interior back taper continue a back taper in drawing, it made to squeeze hangnail through pile body
Side wall enters the soil body, and interior back taper is pulled out out of pile body；
S8, the fast hard material of perfusion: after pulling, outer back taper is pushed, then fast hard material is perfused in anchor thorn bored concrete pile；
S9, detection are checked and accepted: being carried out an acceptance inspection according to construction requirement.
In step S8, the fast hard material includes the component based on mass percentage as follows: 5~15% cinders, 25~
35% sand, 25~35% cement and 25~35% coarse aggregates, preferably 10% cinder, 30% sand, 30% cement and 30% thick bone
Material has the characteristics that rapid heat dissipation, can be improved the hydration rate of cement due to containing cinder in formula, thus improves fast hard
The intensity of material.
The present invention is realized using the expansion arc of outside drawing back taper extrusion expansion stake to be expanded for the first time, is continued up in drawing
Back taper is opened, hangnail is squeezed and extends through the side wall of pile body and be pierced into the soil body, to realize that the expansion twice of anchor thorn bored concrete pile is solid
It is fixed；After expansion construction terminates, back taper pushing will be opened outside using reinforcing bar and will be separated with anchor thorn bored concrete pile bottom, then pierces and is perfused toward anchor
The fast hard material of perfusion in stake, fast hard material can form a hard basis in the bottom of stake, and the bearing area at stake bottom increases in addition
Greatly, the bearing capacity and stability of anchor thorn bored concrete pile will be significantly improved under the two interaction, the more common stake of bearing capacity improves
50% or so.
The utility model has the advantages that
1, the application anchor thorn bored concrete pile, which uses, adds hangnail on expansion arc top, passes through outside drawing back taper, interior back taper
Extrusion expansion section and hangnail respectively, so that the expansion arc deformation of expansion stake enters the soil body, hangnail is pierced into soil through the side wall of pile body
Body, so that have anchor thorn bored concrete pile supports and fixes effect twice, sedimentation is small, stability is good；
2, the application can be taken out interior back taper to repeat using outside bolt clutch separation back taper and interior back taper
It uses.
3, the construction machinery of the application anchor thorn bored concrete pile cooperates jack drawing back taper using chain block, can precisely control
The speed pulled up is made, the accuracy and success rate of construction are improved.
Detailed description of the invention
The present invention is done with reference to the accompanying drawings and detailed description and is further illustrated, of the invention is above-mentioned
And/or otherwise advantage will become apparent.
Fig. 1 is the overall structure figure of anchor thorn bored concrete pile；
Fig. 2 is the drawing process figure of anchor thorn bored concrete pile；
Fig. 3 is the construction completion figure of anchor thorn bored concrete pile；
Fig. 4 is anchor thorn bored concrete pile bolt clutch configuration schematic diagram；
Fig. 5 is anchor thorn bored concrete pile joint structure；
Fig. 6 is anchor thorn construction process of bored concrete pile flow chart.
Specific embodiment
According to following embodiments, the present invention may be better understood.
As shown in Figure 1 to Figure 3, the pile body 6 of anchor thorn bored concrete pile is made of two section steel pipes, passes through steel bushing between two section steel pipes
Cylinder 7 connects, first withDrill bit be equally spaced two circle apertures on steel bushing, the number of every circle aperture is 6~8
It is a, then by two steel pipes insertion steel bushing 7 of spreading, allow every circle aperture on steel bushing 7 to be respectively aligned to respective steel pipe, most
It is welded on respective steel pipe using each aperture on electric weld handle steel bushing 7 afterwards.
6 lower end of pile body has expansion arc 9, and mobilizable hangnail 61 across side wall through hole 63 is equipped with inside pile body 6,
Reinforcing bar 10-1 passes through an interior back taper 11 and connect with the bolt 143 of bolt clutch 14, and the other end passes through pile body 6 and reaction frame 1 pushes up
The chain block 2 in portion connects, and bolt 143 is caught in L-type card slot 142, outside 10 connecting bolt clutch of back taper, 14 bottom；Expansion
9 peripheries of section are cased with a spring band 8, and hangnail 61 is located at one end outside 6 side wall of pile body and cutting ferrule 62 is fixedly mounted；10 longitudinal section of back taper is
Isosceles trapezoid, base diameter be greater than expansion arc 9 initial diameter, top diameter be less than expansion arc 9 initial diameter, interior
Back taper 11 is the centrum on a pinnacle, and base diameter is less than the maximum distance on 6 side wall of pile body between two opposite hangnails 61.
Counter-force lid 5 is equipped at the top of pile body 6,5 upper end of counter-force lid is equipped with reaction frame 1, connection reinforcing bar is equipped at the top of reaction frame 1
The chain block 2 of 10-1；Reaction plate 1-1 that can be up and down is equipped in the middle part of reaction frame 1, the lower part reaction plate 1-1 is equipped with hydraulic
The jack 4 of driving, top are equipped with the collet 13 of fixed steel bars 10-1, and 1 lower part of reaction frame is equipped with fixed plate 16 and hold-doun nut
15, reinforcing bar 10-1 sequentially pass through fixed plate 16, hold-doun nut 15 and collet 13, are revolved by the bolt 13-1 that 13 side of collet is arranged
Tightly reinforcing bar is fixed, jack 4 passes through the control load of power distribution cabinet 3.
As shown in figure 4, bolt clutch 14 is an annulus with the end, bottom is equipped with spring 141, and relative position is set on ring wall
There is L-type card slot 142, two L-type card slots are reversed, and bolt 143 enters from 142 head of L-type card slot, rotation and lower pressing spring 141,
Under 141 elastic acting force of spring, it is caught in 142 tail portion of L-type card slot；When separation, bolt 143 pushes and screws out 142 tail of L-type card slot
Portion is left from 142 head of L-type card slot.
As shown in figure 5, collet 13 includes one for the reinforcing bar 10-1 longitudinal groove 131 passed through and a transverse concave groove 132, bolt
13-1 is screwed in transverse concave groove 132 and is compressed reinforcing bar 10-1.
As indicated in fig. 6 and fig. 3, the construction method of anchor thorn bored concrete pile includes the following steps:
S1, ground pore-forming: ground pore-forming is carried out in the way of shock and vibration, hammering or water punching etc.；
S2, anchor thorn bored concrete pile production: hangnail 61 is passed through to the side wall of pile body 6 from through hole 63, and perforative in hangnail 61
Cutting ferrule 62 is fixedly mounted in external one end, and reinforcing bar 10-1 is passed through interior back taper 11 and is connect with bolt 143, a back taper 10 is placed in swollen outside
Swollen section 9 lower section is connect with 14 bottom of bolt clutch, and bolt 143 is caught in L-type card slot 142, and 9 periphery of expansion arc puts on spring band
8；
S32, then anchor is pierced with reaching required pile body length in 6 top joint steel pipe of pile body by steel bushing 7
Bored concrete pile is sent into pile sinking in pore-forming；
S4, expansion stake are promoted: after the completion of pile sinking, anchor thorn bored concrete pile is promoted into 0.1~0.5m upwards, it is reserved enough at stake bottom
Filling concrete space；
S5, installation are mechanical: counter-force lid 5 and reaction frame 1 are installed at the top of anchor thorn bored concrete pile, by the hand on reaction frame 1
Cucurbit 2 is drawn to connect reinforcing bar 10-1；
S62, jack drawing back taper: installing reaction plate 1-1 on reaction frame 1, and jack 4 is installed in the lower part reaction plate 1-1,
Top installation collet 13 simultaneously fixes reinforcing bar 10-1, and jack 4 drives reaction plate 1-1 to move upwards by power distribution cabinet 3, passes through steel
Back taper 10 and an interior back taper 11 will open back taper using separator 14 after expansion arc 9 is fully expanded outside outside muscle 10-1 drawing
10 and interior back taper 11 separate, continue drawing back taper 11, so that it is squeezed hangnail 61 and enter the soil body through the side wall of pile body 6, and
Interior back taper 11 is pulled out out of pile body 6；
S7, separation outer back taper and interior back taper: after expansion arc 9 is fully expanded, pushing simultaneously Swiveling Rebar 10-1, will
Bolt 143 is screwed out from L-type card slot 142, and separation outer back taper 10 and interior back taper 11 continue a back taper 11 in drawing, squeeze it
The side wall that thorn 61 is overwhelmed through pile body 6 enters the soil body, and interior back taper 11 is pulled out out of pile body 6；
S8, the fast hard material of perfusion: after pulling out, outer back taper is pushed using reinforcing bar, then perfusion is fast in anchor thorn bored concrete pile
Hard material 12 (10% cinder, 30% sand, 30% cement and 30% coarse aggregate)；
S9, detection are checked and accepted: being carried out an acceptance inspection according to construction requirement.
The present invention provides a kind of anchor thorn bored concrete pile and its thinkings and method of construction method, implement the technical solution
Method and approach it is very much, the above is only a preferred embodiment of the present invention, it is noted that for the general of the art
For logical technical staff, various improvements and modifications may be made without departing from the principle of the present invention, these improve and
Retouching also should be regarded as protection scope of the present invention.The available prior art of each component part being not known in the present embodiment is subject to reality
It is existing.
Claims (10)
1. a kind of anchor pierces bored concrete pile, which is characterized in that including pile body (6), open back taper (10), interior back taper (11) and hangnail outside
(61), described pile body (6) one end is equipped with expansion arc (9), and the side wall of the pile body (6) is equipped with through hole (63), hangnail (61) position
In through hole (63)；It is installed with reinforcing bar (10-1) in the middle part of back taper (11) in described, the one end reinforcing bar (10-1) is upward through pile body
(6), the other end is connect with back taper (10) outside, upward by outer of reinforcing bar (10-1) driving back taper (10) and interior back taper (11)
Movement, opening back taper (10) extrusion expansion section (9) outside, deformation occurs, and interior back taper (11) squeezes hangnail (61) and extend through pile body
(6) side wall moves out.
2. a kind of anchor according to claim 1 pierces bored concrete pile, which is characterized in that the hangnail (61) is located in pile body (6)
One end size in portion is greater than through hole (63), and the other end is fixedly installed with cutting ferrule (62) after passing through through hole (63).
3. a kind of anchor according to claim 2 pierces bored concrete pile, which is characterized in that outer back taper (10) longitudinal section is etc.
Waist is trapezoidal, and base diameter is greater than the initial diameter of expansion arc (9), and top diameter is less than expansion arc (9) initial diameter；In described
The centrum that back taper (11) are a pinnacle is opened, base diameter is less than on pile body (6) side wall between two opposite hangnail (61) most
Big distance.
4. a kind of anchor according to claim 3 pierces bored concrete pile, which is characterized in that outer back taper (10) and the interior back taper
(11) a bolt clutch (14) is equipped between, the bolt clutch (14) is an annulus with the end, and bottom is equipped with spring
(141), relative position is equipped with L-type card slot (142) on ring wall；Being equipped in L-type card slot (142) can be along card slot precession or back-out
Bolt (143)；Reinforcing bar (10-1) lower end connecting bolt (143) opens back taper (10) connecting bolt clutch (14) bottom outside.
5. a kind of anchor according to claim 4 pierces bored concrete pile, which is characterized in that expansion arc (9) periphery is cased with a bullet
Spring buckle (8).
6. a kind of anchor according to claim 5 pierces bored concrete pile, which is characterized in that the pile body (6) is by the above steel pipe of a section
Connection composition, two adjacent section steel pipes are connected by steel bushing (7).
7. a kind of anchor according to claim 6 pierces bored concrete pile, which is characterized in that be equipped at the top of pile body (6) counter-force lid (5) and
Reaction frame (1), the counter-force lid (5) are placed at the top of pile body (6), and the reaction frame (1) is installed on counter-force lid (5) upper end, counter-force
The chain block (2) of connection reinforcing bar (10-1) is equipped at the top of frame (1).
8. a kind of anchor according to claim 7 pierces bored concrete pile, which is characterized in that being equipped in the middle part of the reaction frame (1) can
Up and down reaction plate (1-1), the reaction plate lower part (1-1) are equipped with jack (4), and top is equipped with fixed steel bars (10-1)
Collet (13).
9. the construction method of the thorn bored concrete pile of anchor described in claim 8, which comprises the steps of:
S1, ground pore-forming；
S2, anchor thorn bored concrete pile production: hangnail (61) is run through into side wall inside pile body (6), and is fixed in perforative external one end
It installs cutting ferrule (62), reinforcing bar (10-1) is passed through interior back taper (11) and is connect with bolt (143), back taper (10) is opened outside and is placed in expansion
It is connect below section (9) with bolt clutch (14) bottom, bolt (143) is caught in L-type card slot (142), expansion arc (9) periphery set
Upper spring hoop (8)；
S3, judge whether to connect steel pipe as needed；
S31, direct pile sinking: if not needing to connect steel pipe, anchor thorn bored concrete pile is sent into pile sinking in pore-forming；
S32, adapter tube pile sinking: if desired connecing steel pipe, then by steel bushing (7) in pile body (6) top joint steel pipe, needed for reaching
Then anchor thorn bored concrete pile is sent into pile sinking in pore-forming by the pile body length wanted；
S4, expansion stake are promoted: after the completion of pile sinking, anchor thorn bored concrete pile being promoted upwards；
S5, installation are mechanical: counter-force lid (5) and reaction frame (1) are installed at the top of anchor thorn bored concrete pile, it will be on reaction frame (1)
Chain block (2) connects reinforcing bar (10-1)；
S6, judge whether that jack is installed as needed；
S61, chain block drawing back taper: if not needing installation jack, pass through outside chain block (2) drawing back taper (10)
With interior back taper (11)；
S62, jack drawing back taper: if desired installing jack, then installs reaction plate (1-1) on reaction frame (1), reaction plate
Jack (4) are installed in the lower part (1-1), and collet (13) and reinforcing bar (10-1) is fixed, jack (4) driving reaction plate is installed on top
(1-1) is moved upwards, and passes through outside reinforcing bar (10-1) drawing back taper (10) and interior back taper (11)；
S7, separation outer back taper and interior back taper: after expansion arc (9) is fully expanded, pushing simultaneously Swiveling Rebar (10-1), will
Bolt (143) is screwed out from L-type card slot (142), and separation outer back taper (10) and interior back taper (11) continue a back taper in drawing
(11), so that it is squeezed hangnail (61) and enter the soil body through the side wall of pile body (6), and will be drawn out of pile body (6) for interior back taper (11)
Out；
S8, the fast hard material of perfusion: after pulling, outer back taper (10) is pushed, then fast hard material is perfused in anchor thorn bored concrete pile；
S9, detection are checked and accepted.
10. a kind of construction method of anchor thorn bored concrete pile according to claim 9, which is characterized in that described fast in step S8
Hard material includes the component based on mass percentage as follows: 5~15% cinders, 25~35% sand, 25~35% cement and
25~35% coarse aggregates.
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| CN1032499C (en) * | 1992-07-01 | 1996-08-07 | 能源部电力建设研究所 | Perfusion pile under-reaming press head and reaming method |
| CN2153578Y (en) * | 1993-02-27 | 1994-01-19 | 吴宝君 | High efficiency ground pile |
| JP5237726B2 (en) * | 2008-08-22 | 2013-07-17 | 基礎工事株式会社斉藤組 | Assembly rebar |
| CN201280720Y (en) * | 2008-09-08 | 2009-07-29 | 安徽省高速公路总公司 | Minor diameter self-balancing filling pile root key pushing device |
| CN205501994U (en) * | 2016-03-21 | 2016-08-24 | 中国化学工程重型机械化公司 | All steel sleeve pipe dado bored concrete pile of high bearing capacity |
| CN107460870B (en) * | 2017-09-21 | 2018-09-14 | 河海大学 | A kind of coastal waters beach hydrometric station stake bar |
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