CN105040698B - The piling drive mechanism of comprehensive piling machine - Google Patents

The piling drive mechanism of comprehensive piling machine Download PDF

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CN105040698B
CN105040698B CN201510467584.8A CN201510467584A CN105040698B CN 105040698 B CN105040698 B CN 105040698B CN 201510467584 A CN201510467584 A CN 201510467584A CN 105040698 B CN105040698 B CN 105040698B
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drilling rod
piling
hammer
pile hammer
passage
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CN105040698A (en
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周兆弟
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周兆弟
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Abstract

The invention belongs to Architectural Equipment technical field, especially relate to the piling drive mechanism of a kind of comprehensive piling machine.It solve the problems such as existing piling machine operating type is single.Including the rack body vertically arranged, there is inside rack body vertical direction and run through the construction passage of whole rack body, rack body upper end is provided with upper frame body, in upper frame body, portion has the drilling rod placed cavity being connected with construction passage, if being provided with the safety chuck with dry pipe body being positioned at above construction passage in drilling rod placed cavity, safety chuck connects has adjustable drilling rod to drive structure, upper frame body side is provided with the piling hammer body being positioned at above construction passage, and piling hammer body connects has adjustable pile hammer to drive structure.The advantage of the piling drive mechanism of the most comprehensive piling machine is: having rotation piling and jump bit two kinds of operating types of piling, two kinds of model of action do not interfere with each other and easy switching, drive good stability, and protection effect is good, and safety is high.

Description

The piling drive mechanism of comprehensive piling machine
Technical field
The invention belongs to Architectural Equipment technical field, especially relate to a kind of comprehensive piling machine Piling drive mechanism.
Background technology
At present, piling machinery construction site used has two kinds: a kind of rotation piling Machine, the structure of this piling machine is to utilize the drilling rod hanger bracket of hoist engine pull-up, by boring Bar is holed;Another kind is jump bit piling machine, and the structure of this piling machine is to utilize volume Raising machine pull-up jump bit repeatedly to fall, promote and realize piling, two kinds of piling modes are each There are pluses and minuses, if a kind of piling mode needs to need during difficulty to change a kind of piling mode, Such as, when swivelling pile driver cannot bore, need additionally to call jump bit piling machine, This greatly increases construction cost, and need to remove swivelling pile driver, more again Jump bit piling machine is installed, increases difficulty of construction, reduce efficiency of construction.
In order to solve the problem that prior art exists, people have carried out long-term exploration, have carried Go out solution miscellaneous.Such as, Chinese patent literature discloses a kind of hydraulic pressure Combination jump bit rig [application number: 201410740085.7], it includes power source, whole Body frame, walking mechanism, attitude mechanism, liftable pipe winding mechanism, upper unit head, under Unit head, hoist engine, drilling tool clamper, Combined hydraulic jump bit drill bit.Walking mechanism For crawler travel, hydraulic speed reducer driving, integral-rack is installed on walking mechanism main body On;Power source, attitude mechanism, unit head, liftable pipe crimping are installed on integral-rack Mechanism, Combined hydraulic jump bit drill bit.Such scheme to some extent solves existing Piling machine cannot have to rotate simultaneously drives piles and the problem of jump bit piling, but the program Still also exist: operation easier is big, and protection effect is poor, and easily interfere during construction asks Topic.
Summary of the invention
It is an object of the invention to for the problems referred to above, it is provided that a kind of simple and reasonable, drive The piling drive mechanism of the comprehensive piling machine that dynamic stability is good.
For reaching above-mentioned purpose, present invention employs following technical proposal: this is comprehensively driven piles The piling drive mechanism of machine, including the rack body vertically arranged, described props up Frame body interior has vertical direction and runs through the construction passage of whole rack body, its feature Being, described rack body upper end is provided with upper frame body, and in described upper frame body, portion has The drilling rod placed cavity being connected with construction passage, is provided with in drilling rod placed cavity and is positioned at construction If the safety chuck with dry pipe body above passage, described safety chuck connects to be had and can drive Dynamic safety chuck moves along construction passage axial reciprocating and safety chuck can be driven horizontal along construction passage Driving structure to the adjustable drilling rod of movement, described upper frame body side is provided with and is positioned at construction Piling hammer body above passage, described piling hammer body connection has can drive piling hammer body edge Construction passage axial reciprocating moves and piling hammer body can be driven along construction passage transverse shifting Adjustable pile hammer drives structure.During construction, rack body is arranged on translation mechanism, So that rack body can laterally and longitudinally move, can be driven by adjustable drilling rod Structure drives safety chuck lifting so that drilling rod moves down and realization of holing rotates and beats Stake, when needs switch to jump bit piling, can move rack body so that beating Pile monkey body moves to the position of original safety chuck, and drives structure by adjustable pile hammer Realize the lifting of piling hammer body.
In the piling drive mechanism of above-mentioned comprehensive piling machine, described construction passage by Respectively axially extended hammer passage, drilling rod passage and drive passage cross connection successively and Become, and described pile hammer body is positioned at above hammer passage, described drilling rod placed cavity position Being connected above drilling rod passage and with drilling rod passage, described upper frame body side is provided with position In driving the side frame body above passage.So make to rotate piling and both jump bit piling Between do not interfere with each other, and protection effect when can improve operation.
In the piling drive mechanism of above-mentioned comprehensive piling machine, on described rack body Have along the axially extended opening of rack body near hammer passage side, and described opening Mouth is connected with hammer passage.So it is easily installed piling hammer body and drill rod assemblies.
In the piling drive mechanism of above-mentioned comprehensive piling machine, described adjustable drilling rod Being arranged on interior and along construction passage horizontally set the drilling rod of upper frame body translates to drive structure to include Guide rail, described drilling rod translating rails slides and is provided with drilling rod translating trolleys, and described Drilling rod translating trolleys is provided with and drilling rod translating trolleys can be driven the most past along drilling rod translating rails The drilling rod trolley translation assembly of multiple movement, between described drilling rod translating trolleys and side frame body It is provided with the safety chuck that safety chuck can be driven to move axially and drives assembly.
In the piling drive mechanism of above-mentioned comprehensive piling machine, described drilling rod dolly is put down Move assembly include some be arranged on drilling rod translating trolleys outer circumferential and with drilling rod translating rails The drilling rod trolley idler wheels leant, is provided with on upper frame body and has the first of the first expansion link Driver, and the first expansion link end of the first described driver and drilling rod translating trolleys It is connected.I.e. control drilling rod translating trolleys by the first driver to move, thus realize boring The transverse shifting of pole socket.
In the piling drive mechanism of above-mentioned comprehensive piling machine, described safety chuck drives Assembly includes at least two drilling rod cable wire roller along drilling rod translating trolleys horizontally set, institute Drilling rod pull rope, and described drilling rod pull rope one it is arranged with on the drilling rod cable wire roller stated End is arranged on drilling rod and drives on hoist engine, and the other end is connected with safety chuck.Driven by drilling rod Dynamic hoist engine controls moving up and down of safety chuck, thus realizes the rising of drilling rod, whereabouts Process.
In the piling drive mechanism of above-mentioned comprehensive piling machine, described adjustable piling Hammer drives structure to include being arranged on upper frame body upper end and the piling along construction passage horizontally set Hammer translating rails, described pile hammer translating rails slides and is provided with pile hammer translating trolleys, And described pile hammer translating trolleys is provided with and pile hammer translating trolleys can be driven along pile hammer The pile hammer trolley translation assembly that translating rails axial reciprocating moves, described piling hammer out Move and between dolly and side frame body, be provided with the pile hammer driving that piling hammer body can be driven to move axially Assembly.
In the piling drive mechanism of above-mentioned comprehensive piling machine, described pile hammer dolly Translation assembly include some be arranged on pile hammer translating trolleys outer circumferential and with piling hammer out Move the pile hammer trolley idler wheels that leans of guide rail, upper frame body is provided with and has second and stretch Second driver of bar, and the second expansion link end and piling of the second described driver Hammer translating trolleys is connected.I.e. control pile hammer translating trolleys by the second driver to move, Thus realize the adjustment of piling hammer body lateral attitude.
In the piling drive mechanism of above-mentioned comprehensive piling machine, described pile hammer drives Assembly includes at least two pile hammer cable wire rolling along pile hammer translating trolleys horizontally set Wheel, described pile hammer cable wire roller is arranged with pile hammer pull rope, and described beating Pile monkey pull rope one end is arranged on pile hammer and drives on hoist engine, the other end and piling hammer body It is connected.Hoist engine is driven to control the drive piles rising of hammer body, dropping process by pile hammer.
In the piling drive mechanism of above-mentioned comprehensive piling machine, described pile hammer drives Hoist engine and drilling rod drive hoist engine to be arranged in side frame body.So make whole support The good stability of body, is difficult to tilt phenomenon occur, and preferably, pile hammer here Hoist engine and drilling rod is driven to drive hoist engine all to use hydraulic winch.
Compared with prior art, the advantage of the piling drive mechanism of this comprehensive piling machine exists In: having rotation piling and jump bit two kinds of operating types of piling, two kinds of model of action are mutual Not disturbing and easy switching, drive good stability, protection effect is good, and safety is high.
Accompanying drawing explanation
Fig. 1 is the structural representation under use state of the present invention.
Fig. 2 is the enlarged drawing in Fig. 1 at A.
Fig. 3 is the partial structurtes schematic diagram of the present invention.
Fig. 4 is the structural representation of medium-height trestle body of the present invention.
In figure, rack body 1, opening 11, construction passage 2, hammer passage 21, brill Bar passage 22, drive passage 23, upper frame body 3, drilling rod placed cavity 31, side frame body 32, Safety chuck 6, drilling rod body 61, adjustable drilling rod drive structure 7, drilling rod translating rails 71, Drilling rod translating trolleys 72, drilling rod trolley idler wheels the 73, first driver 74, first are stretched Bar 741, drilling rod cable wire roller 75, drilling rod drive hoist engine 76, piling hammer body 8, can Mode pile hammer drive structure 9, pile hammer translating rails 91, pile hammer translating trolleys 92, Pile hammer trolley idler wheels the 93, second driver the 94, second expansion link 941, pile hammer steel Rope roller 95, pile hammer drive hoist engine 96.
Detailed description of the invention
With detailed description of the invention the present invention done further details of theory below in conjunction with the accompanying drawings Bright.
As shown in Fig. 1-2 and Fig. 4, the piling drive mechanism of this comprehensive piling machine, bag Including the rack body 1 vertically arranged, rack body 1 is internal has vertical direction Running through the construction passage 2 of whole rack body 1, rack body 1 upper end is provided with upper frame body 3, Upper frame body 3 is internal has the drilling rod placed cavity 31 being connected with construction passage 2, at drilling rod If being provided with the brill with dry pipe body 61 being positioned at above construction passage 2 in placed cavity 31 Pole socket 6, safety chuck 6 connect have can drive safety chuck 6 along construction passage 2 axial reciprocating Move and safety chuck 6 can be driven to drive along the adjustable drilling rod of construction passage 2 transverse shifting Structure 7, upper frame body 3 side is provided with the piling hammer body 8 being positioned at above construction passage 2, beats Pile monkey body 8 connect have can drive drive piles hammer body 8 along construct passage 2 axial reciprocating move and Piling hammer body 8 can be driven to drive knot along the adjustable pile hammer of construction passage 2 transverse shifting Structure 9, during construction, rack body 1 is arranged on translation mechanism, so that support is originally Body 1 can laterally and longitudinally move, and structure 7 can be driven to drive by adjustable drilling rod Safety chuck 6 lifts so that drilling rod 61 moves down and realization of holing rotates piling, when needing During jump bit to be switched to piling, rack body 1 can be moved so that hammer body of driving piles 8 positions moving to original safety chuck 6, and drive structure 9 by adjustable pile hammer Realize the lifting of piling hammer body 8.
Specifically, the construction passage 2 in the present embodiment is led to by the most axially extended hammer Road 21, drilling rod passage 22 form with driving passage 23 cross connection successively, and pile hammer Body 8 is positioned at above hammer passage 21, and drilling rod placed cavity 31 is positioned at above drilling rod passage 22 And be connected with drilling rod passage 22, upper frame body 3 side is provided with and is positioned on driving passage 23 The side frame body 32 of side, so makes to rotate piling and does not does mutually between the two with jump bit piling Disturb, and protection effect when can improve operation.Install during in order to construct piling hammer body 8 with Drill rod assemblies, rack body 1 here has along support near hammer passage 21 side The axially extended opening of body 1 11, and opening 11 is connected with hammer passage 21.
Further, as Figure 1-3, the adjustable drilling rod in the present embodiment drives knot Structure 7 includes that being arranged on interior and along construction passage 2 horizontally set the drilling rod of upper frame body 3 translates Guide rail 71, drilling rod translating rails 71 slides and is provided with drilling rod translating trolleys 72, and drilling rod Translating trolleys 72 is provided with and drilling rod translating trolleys 72 can be driven along drilling rod translating rails 71 The drilling rod trolley translation assembly that axial reciprocating moves, drilling rod translating trolleys 72 and side frame body Be provided with between 32 safety chuck 6 can be driven to move axially safety chuck drive assembly, wherein, Here drilling rod trolley translation assembly include some be arranged on drilling rod translating trolleys 72 circumference Outside and the drilling rod trolley idler wheels 73 leant with drilling rod translating rails 71, at upper frame body 3 It is provided with first driver 74 with the first expansion link 741, and the first driver 74 The first expansion link 741 end be connected with drilling rod translating trolleys 72, i.e. by first driving Device 74 controls drilling rod translating trolleys 72 and moves, thus realizes the horizontal shifting of safety chuck 6 Dynamic.Here safety chuck drives assembly to include that at least two is horizontal along drilling rod translating trolleys 72 The drilling rod cable wire roller 75 arranged, drilling rod cable wire roller 75 is arranged with drilling rod pull rope, And drilling rod pull rope one end is arranged on drilling rod and drives on hoist engine 76, the other end and safety chuck 6 are connected, and drive hoist engine 76 to control moving up and down of safety chuck 6 by drilling rod, from And realize the rising of drilling rod 61, dropping process.
Further, adjustable pile hammer here drives structure 9 to include being arranged on top Support body 3 upper end and the pile hammer translating rails 91 along construction passage 2 horizontally set, piling Slide on hammer translating rails 91 and be provided with pile hammer translating trolleys 92, and pile hammer translation is little Car 92 is provided with and pile hammer translating trolleys 92 can be driven axial along pile hammer translating rails 91 The pile hammer trolley translation assembly moved back and forth, pile hammer translating trolleys 92 and side frame body It is provided with between 32 and the piling pile hammer that moves axially of hammer body 8 can be driven to drive assembly, wherein, Here pile hammer trolley translation assembly includes some being arranged on pile hammer translating trolleys 92 Outer circumferential and the pile hammer trolley idler wheels 93 leant with pile hammer translating rails 91, Upper frame body 3 is provided with second driver 94 with the second expansion link 941, and second Second expansion link 941 end of driver 94 is connected with pile hammer translating trolleys 92, i.e. Control pile hammer translating trolleys 92 by the second driver 94 to move, thus realize beating The adjustment of pile monkey body 8 lateral attitude, pile hammer here drives assembly to include at least two Along the pile hammer cable wire roller 95 of pile hammer translating trolleys 92 horizontally set, pile hammer steel It is arranged with pile hammer pull rope on rope roller 95, and pile hammer pull rope one end is arranged on and beats Pile monkey drives on hoist engine 96, and the other end is connected with piling hammer body 8, i.e. passes through pile hammer Elevator 96 machine is driven to control the drive piles rising of hammer body 8, dropping process.So that Both sides, frame body 1 upper end weight balancing, pile hammer drives hoist engine 96 to drive volume with drilling rod Raise machine 76 to be arranged in side frame body 32, so make stablizing of whole rack body 1 Property good, be difficult to that tilt phenomenon occurs, pile hammer here drives hoist engine 96 to drive with drilling rod Dynamic hoist engine 76 all uses hydraulic winch.
The principle of the present embodiment is: during construction, realizes support originally by translation mechanism Laterally and longitudinally moving of body 1, when needs carry out rotating piling, the first driver 74 Control drilling rod translating trolleys 72 to move, thus the lateral attitude realizing safety chuck 6 adjust, Drive hoist engine 76 to control moving up and down of safety chuck 6 by drilling rod again, thus realize The rising of drilling rod 61, dropping process, complete to rotate piling process, when needs switch to During jump bit piling, rack body 1 can be moved so that hammer body 8 of driving piles moves to The originally top of the position of safety chuck 6, and control pile hammer by the second driver 94 Translating trolleys 92 moves, thus realizes the adjustment of piling hammer body 8 lateral attitude, then passes through Pile hammer drives elevator 96 machine to control the drive piles rising of hammer body 8, dropping process, until Complete jump bit piling.
Specific embodiment described herein is only to present invention spirit theory for example Bright.Those skilled in the art can be to described specific embodiment Make various amendment or supplement or use similar mode to substitute, but without departing from The spirit of the present invention or surmount scope defined in appended claims.
Although the most more employ rack body 1, opening 11, construction passage 2, Hammer passage 21, drilling rod passage 22, driving passage 23, upper frame body 3, drilling rod placed cavity 31, side frame body 32, safety chuck 6, drilling rod body 61, adjustable drilling rod drive structure 7, Drilling rod translating rails 71, drilling rod translating trolleys 72, drilling rod trolley idler wheels 73, first drive Dynamic device the 74, first expansion link 741, drilling rod cable wire roller 75, drilling rod drive hoist engine 76, Piling hammer body 8, adjustable pile hammer drive structure 9, pile hammer translating rails 91, beat Pile monkey translating trolleys 92, pile hammer trolley idler wheels the 93, second driver 94, second stretch Contracting bar 941, pile hammer cable wire roller 95, pile hammer drive the terms such as hoist engine 96, but It is not precluded from using the probability of other term.These terms are used to be only used to more square Just the essence of the present invention is described and explained;It is construed as any additional limit System is all contrary with spirit of the present invention.

Claims (9)

1. a piling drive mechanism for comprehensive piling machine, including vertically arrange Rack body (1), described rack body (1) inside has vertical direction and runs through whole The construction passage (2) of rack body (1), it is characterised in that described rack body (1) Upper end is provided with upper frame body (3), and described upper frame body (3) is internal to be had and construction passage (2) The drilling rod placed cavity (31) being connected, is provided with in drilling rod placed cavity (31) and is positioned at construction Passage (2) if top the safety chuck (6) with dry pipe body (61), described brill Pole socket (6) connection has can drive safety chuck (6) edge construction passage (2) axial reciprocating shifting Move and safety chuck (6) can be driven along the adjustable drilling rod of construction passage (2) transverse shifting Driving structure (7), described upper frame body (3) side is provided with and is positioned at construction passage (2) The piling hammer body (8) of top, described piling hammer body (8) connection has can drive pile hammer Body (8) moves along construction passage (2) axial reciprocating and can drive piling hammer body (8) edge The adjustable pile hammer of construction passage (2) transverse shifting drives structure (9);Described executes Work passage (2) is by axially extended hammer passage (21), drilling rod passage (22) respectively Form with driving passage (23) cross connection successively, and described piling hammer body (8) position In hammer passage (21) top, described drilling rod placed cavity (31) is positioned at drilling rod passage (22) above and it is connected with drilling rod passage (22), described upper frame body (3) side It is provided with and is positioned at the side frame body (32) driving passage (23) top.
The piling drive mechanism of comprehensive piling machine the most according to claim 1, it is special Levying and be, described rack body (1) is upper has edge near hammer passage (21) side Rack body (1) axially extended opening (11), and described opening (11) with hit Hammer passage (21) is connected.
The piling drive mechanism of comprehensive piling machine the most according to claim 1 and 2, It is characterized in that, described adjustable drilling rod drives structure (7) to include being arranged on upper frame body (3) the drilling rod translating rails (71) of in and edge construction passage (2) horizontally set, described The upper slip of drilling rod translating rails (71) be provided with drilling rod translating trolleys (72), and described Drilling rod translating trolleys (72) is provided with and drilling rod translating trolleys (72) can be driven to put down along drilling rod Moving the drilling rod trolley translation assembly that guide rail (71) axial reciprocating moves, described drilling rod is put down Moving to be provided with between dolly (72) and side frame body (32) to drive safety chuck (6) axially to move Dynamic safety chuck drives assembly.
The piling drive mechanism of comprehensive piling machine the most according to claim 3, it is special Levying and be, described drilling rod trolley translation assembly includes some being arranged on drilling rod translating trolleys (72) outer circumferential and the drilling rod trolley idler wheels that leans with drilling rod translating rails (71) (73), upper frame body (3) is provided with have the first expansion link (741) first driving Device (74), and the first expansion link (741) end of described the first driver (74) It is connected with drilling rod translating trolleys (72).
The piling drive mechanism of comprehensive piling machine the most according to claim 3, it is special Levying and be, described safety chuck drives assembly to include that at least two is along drilling rod translating trolleys (72) drilling rod cable wire roller (75) of horizontally set, described drilling rod cable wire roller (75) On be arranged with drilling rod pull rope, and described drilling rod pull rope one end is arranged on drilling rod and drives On hoist engine (76), the other end is connected with safety chuck (6).
The piling drive mechanism of comprehensive piling machine the most according to claim 5, it is special Levying and be, described adjustable pile hammer drives structure (9) to include being arranged on upper frame body (3) Upper end and the pile hammer translating rails (91) along construction passage (2) horizontally set, described The upper slip of pile hammer translating rails (91) be provided with pile hammer translating trolleys (92), and institute The pile hammer translating trolleys (92) stated is provided with and can drive pile hammer translating trolleys (92) The pile hammer trolley translation assembly moved along pile hammer translating rails (91) axial reciprocating, It is provided with to drive between described pile hammer translating trolleys (92) and side frame body (32) and beats The pile hammer that pile monkey body (8) moves axially drives assembly.
The piling drive mechanism of comprehensive piling machine the most according to claim 6, it is special Levying and be, described pile hammer trolley translation assembly includes that some pile hammer that is arranged on translate Dolly (92) outer circumferential and the pile hammer leant with pile hammer translating rails (91) Trolley idler wheels (93), is provided with on upper frame body (3) and has the second expansion link (941) Second driver (94), and second expansion link (941) of described the second driver (94) End is connected with pile hammer translating trolleys (92).
The piling drive mechanism of comprehensive piling machine the most according to claim 6, it is special Levying and be, described pile hammer drives assembly to include that at least two is along pile hammer translating trolleys (92) pile hammer cable wire roller (95) of horizontally set, described pile hammer cable wire roller (95) it is arranged with pile hammer pull rope on, and described pile hammer pull rope one end is arranged Driving on hoist engine (96) in pile hammer, the other end is connected with piling hammer body (8).
The piling drive mechanism of comprehensive piling machine the most according to claim 8, it is special Levying and be, described pile hammer drives hoist engine (96) to drive hoist engine (76) with drilling rod It is arranged in side frame body (32).
CN201510467584.8A 2015-07-31 2015-07-31 The piling drive mechanism of comprehensive piling machine Active CN105040698B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105484262B (en) * 2016-01-30 2017-06-23 周兆弟 Piling machine
CN105714767B (en) * 2016-01-30 2017-10-10 周兆弟 The perfusion system of piling machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3420320A (en) * 1967-02-23 1969-01-07 Marutai Doboku Co Ltd Pile driver
US4785892A (en) * 1984-11-08 1988-11-22 Luen Lam M Pile driver, pile drawer and/or drilling machine
CN2375670Y (en) * 1999-06-03 2000-04-26 孙新河 Multi-functional pile driver
CN1594756A (en) * 2004-07-13 2005-03-16 蔡崇晓 Drilling and pressing type pile press and construction technology
CN202214727U (en) * 2011-08-29 2012-05-09 中联重科股份有限公司 Pile driver
CN104763328A (en) * 2015-04-02 2015-07-08 宁波易和桩基工程技术开发有限公司 Hydraulic reaming circulation drilling machine and reaming pile construction technology thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3420320A (en) * 1967-02-23 1969-01-07 Marutai Doboku Co Ltd Pile driver
US4785892A (en) * 1984-11-08 1988-11-22 Luen Lam M Pile driver, pile drawer and/or drilling machine
CN2375670Y (en) * 1999-06-03 2000-04-26 孙新河 Multi-functional pile driver
CN1594756A (en) * 2004-07-13 2005-03-16 蔡崇晓 Drilling and pressing type pile press and construction technology
CN202214727U (en) * 2011-08-29 2012-05-09 中联重科股份有限公司 Pile driver
CN104763328A (en) * 2015-04-02 2015-07-08 宁波易和桩基工程技术开发有限公司 Hydraulic reaming circulation drilling machine and reaming pile construction technology thereof

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