CN102628272B - Apparatus for separating construction component from pile foundation - Google Patents
Apparatus for separating construction component from pile foundation Download PDFInfo
- Publication number
- CN102628272B CN102628272B CN201210119551.0A CN201210119551A CN102628272B CN 102628272 B CN102628272 B CN 102628272B CN 201210119551 A CN201210119551 A CN 201210119551A CN 102628272 B CN102628272 B CN 102628272B
- Authority
- CN
- China
- Prior art keywords
- telescopic hydraulic
- hydraulic
- pile foundation
- hydraulic oil
- telescopic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The invention discloses an apparatus for separating a construction component from a pile foundation, comprising a vibratory hammer mechanism, a hydraulic jacking system which provides power for the vibratory hammer mechanism to rise upward, a hydraulic station which controls the opening and shutting of an oil path of the hydraulic jacking system, and a hydraulic clamp which is used for clamping the construction component. The hydraulic jacking system includes a telescopic hydraulic cylinder group which comprises at least two pairs of telescopic hydraulic cylinders, wherein the two telescopic hydraulic cylinders in each pair are disposed longitudinally and piston rods of the two telescopic hydraulic cylinders abut against each other. The telescopic hydraulic cylinder group arranged in the apparatus provided by the invention comprises at least two pairs of telescopic hydraulic cylinders, wherein the two telescopic hydraulic cylinders are longitudinally arranged and abut against each other in each pair. The two telescopic hydraulic cylinders run separately and work together to enable the vibratory hammer mechanism to drive the hydraulic clamp which is used for clamping the construction component to rise upward, completing the separation of the construction component from the pile foundation smoothly and rapidly. The construction component pulled out by adopting the apparatus of the invention can be used repeatedly, which greatly saves construction cost.
Description
Technical field
The present invention relates to bridge construction technical field, particularly relate to a kind of pile foundation construction components apart device.
Background technology
The pile foundation construction of bridge is very important link in bridge construction work progress.Divide by construction method, pile foundation is divided into bored pile, driven pile, silent piling, tube-sinking cast-in-situ pile, explosion expanded piling, hollow tube pile.Wherein, in the pile foundation construction method of drill-pouring, prior art generally will use steel pile casting as construction additional device, and steel pile casting generally designs embedded depth and is about 10m ~ 60m.During construction, usually adopt vibrating hammer that steel pile casting is squeezed into soil layer soil and use large-scale auger and large-scale punching machine to carry out construction pore-creating in the region that steel pile casting sidewall surrounds afterwards, after pore-forming, carry out scarfing cinder, after scarfing cinder completes, disposablely pour into cement concrete.Prior art, by the restriction of self construction party skill, steel pile casting cannot be extracted, and then the turnover that can not realize steel pile casting is reused after cement concrete pours into stake holes.And if extract steel pile casting by force, then can affect construction quality again, so just make in each pile foundation construction, steel pile casting is all retained in pile foundation, and a steel pile casting can only use once, and construction cost is high.
Summary of the invention
The application applicant proposed a kind of pile foundation construction method, after pore-forming, isolator is put in stake holes, then pour into a mould, after casting complete, the part in isolator is extracted, again steel pile casting is extracted, so just make steel pile casting and construction accessory part (part for isolator) to be pulled out, and then recycling.
In view of this, the object of the present invention is to provide a kind of pile foundation construction components apart device, steel pile casting and other construction accessory parts can be extracted smoothly, reduce construction cost.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of pile foundation construction components apart device, involving vibrations hammer mechanism, for vibrating hammer mechanism upwards rise provide the hydraulic jacking system of power, the opening and closing of hydraulic control jack-up system oil circuit Hydraulic Station and for clamp construction assembly hydraulic clip, described hydraulic jacking system comprises telescopic hydraulic oil cylinder group, described telescopic hydraulic oil cylinder group comprises at least two pairs of telescopic hydraulic oil cylinders, in often pair of telescopic hydraulic oil cylinder, two telescopic hydraulic oil cylinders are setting up and down and the piston rod of two telescopic hydraulic oil cylinders is connected to together.
Preferably, described hydraulic jacking system also comprises hydraulic pressure holder, and in often pair of telescopic hydraulic oil cylinder, one of them is connected with hydraulic pressure holder, and another is connected with vibrating hammer mechanism.
Preferably, described vibrating hammer mechanism involving vibrations hammer and the vibrating hammer bearing that is positioned at below vibrating hammer.
Preferably, described vibrating hammer mechanism involving vibrations hammer and the vibrating hammer bearing be positioned at below vibrating hammer, another telescopic hydraulic oil cylinder is connected with described vibrating hammer bearing.
Preferably, described hydraulic jacking system also comprises several piston oil-cylinders, is connected with described hydraulic pressure holder.
Preferably, the pipeline between hydraulic jacking system and Hydraulic Station is provided with hand-operated valve.
Compared with prior art, pile foundation construction components apart device of the present invention, can be applied in pile foundation construction, after construction completes, steel pile casting and other construction assemblies is extracted smoothly, is separated with pile foundation; The telescopic hydraulic oil cylinder group arranged is owing to comprising at least two to upper and lower two telescopic hydraulic oil cylinders abutted, these two each self-operatings of telescopic hydraulic oil cylinder, vibrating hammer mechanism is jointly made to drive the hydraulic clip upwards jacking of clamping construction assembly, smoothly, being separated of construction assembly and pile foundation is completed quickly, construction assembly can be pulled out, reuse, greatly saved construction cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of pile foundation construction components apart device one preferred embodiment of the present invention;
Fig. 2 constructs the pile foundation construction method of components apart device after pore-forming, the position relationship schematic diagram of steel pile casting and stake holes in application drawing 1;
Fig. 3 is the structural representation that in Fig. 2, stake holes puts into isolator;
Fig. 4 is the structural representation of isolator in Fig. 3;
Fig. 5 is the schematic diagram at B place in Fig. 4;
Fig. 6 is the top view of isolator in Fig. 4;
Fig. 7 is the structural representation of fixture in Fig. 6;
Fig. 8 is isolator scheme of installation;
Fig. 9 is the schematic diagram in stake holes after fluid concrete;
Figure 10 is the schematic diagram pulling out the second plate body and the 3rd plate body;
Figure 11 is the schematic diagram extracting stake holes after the second plate body and the 3rd plate body;
Figure 12 is the schematic diagram in the vibration steel pile casting periphery soil before pull steel protective-cylinder;
Figure 13 is the top view (not containing pile foundation) of Figure 12;
Figure 14 is the schematic diagram of pull steel protective-cylinder;
Figure 15 is the top view (not containing pile foundation) of Figure 14.
Detailed description of the invention
In order to make those skilled in the art understand technical scheme of the present invention better, below by specific embodiment, the present invention is described in further detail by reference to the accompanying drawings.
See Fig. 1, the pile foundation construction components apart device involving vibrations hammer mechanism in the present embodiment, hydraulic clip, hydraulic jacking system, Hydraulic Station.
Wherein, vibrating hammer mechanism involving vibrations hammer 14 and the vibrating hammer bearing 15 that is positioned at below vibrating hammer.Hydraulic jacking system comprises telescopic hydraulic oil cylinder group 16 and piston oil-cylinder 17, hydraulic pressure holder 18.Telescopic hydraulic oil cylinder group 16 comprises 8 telescopic hydraulic oil cylinders, and wherein four telescopic hydraulic oil cylinder 16a and four piston oil-cylinders 17 are arranged on hydraulic pressure holder 18 respectively, and hydraulic pressure holder 18 is arranged on above pile foundation.The out-of-flatness of pile foundation top, four piston oil-cylinders of setting, by adjusting the length that respective piston rod stretches out, make hydraulic pressure holder be horizontal.Vibrating hammer 14 and bearing 15 thereof are arranged on hydraulic jacking system, bearing 15 is connected with four telescopic hydraulic oil cylinder 16b of telescopic hydraulic oil cylinder, telescopic hydraulic oil cylinder 16a and telescopic hydraulic oil cylinder 16b is the form that mirror image abuts against, namely along the set-up mode that a certain plane symmetrically abuts.The hydraulic clip 10 arranged below bearing is used for clamping steel pile casting.
Telescopic hydraulic oil cylinder and piston oil-cylinder are connected with a Hydraulic Station 20 respectively by hydraulic oil pipe group 19, and hydraulic oil pipe group 19 comprises multiple oil pipe, and each oil pipe is provided with a hand-operated valve 21.
The pile foundation construction method utilizing the construction components apart device of the present embodiment to carry out comprises the steps:
1, the formation of pile foundation
1) stake holes is become
On ground to be onstructed, vibrating hammer is adopted to exert a force to steel pile casting, construct in the region using large-scale auger and large-scale punching machine to surround at steel pile casting sidewall after being squeezed into soil layer, form stake holes 2, see Fig. 2, steel pile casting 1 stretches in ground, and the soil outside steel pile casting is followed successively by mucky soil A1, powder fine sand A2, clay A3 from top to bottom; A loess retaining wall 3 is formed inside steel pile casting 1;
2) isolator is put into
After pile foundation pore-forming, put into isolator, isolator coordinates schematic diagram see Fig. 3 with stake holes.See Fig. 4, Fig. 5, Fig. 6, this isolator is the cylindrical of hollow, its sidewall is surrounded by multiple split, after each split impales, inner side is linked together by clamping ring 5, along the longitudinal direction of each split, can according to actual conditions, arrange multiple clamping ring, clamping ring 5 is multistage body, and each section is connected by automatic-separation mechanism 6.Wherein, see Fig. 5, Fig. 6, each split comprises the first plate body 41, second plate body 42, the 3rd plate body 43 from inside to outside successively, and in order to weight reduction, cost-saving, the 3rd plate body 43 is spliced by plastic plate 43a and steel plate 43b.Wherein, the first plate body can adopt plank or plastic plate to make; Second plate body adopts steel plate to make.Linked together by easily broken screw 44 between first plate body and the second plate body.Linked together by steel screw between second plate body and the 3rd plate body.
See Fig. 7, this automatic-separation mechanism 6 is a connecting element, this connecting element is formed by two assemblies 61,62 grafting, two assemblies 61,62 in automatic-separation mechanism are divided on adjacent different clamping ring segment body, wherein assembly 61 is provided with groove, assembly 62 is provided with the projection of groove fit, and this projection stretches in groove, is then connected by easily broken screw 63.
Above easily broken screw refers to the screw of stressed rear easy fracture, and the low material of intensity can be adopted to make, as timber, brittle plastic etc.
See Fig. 8, in practice of construction, general darker due to the stake holes degree of depth, so the isolator arranged is also longer, for the ease of producing, transporting, isolator is generally longitudinally divided into more piece, is followed successively by top joint C1, standard knot C2, bottom joint C3 from top to bottom, wherein, standard knot can arrange multiple according to actual needs.The bottom of top joint is connected with the upper end of standard knot, the upper end that bottom and the bottom of standard knot are saved is connected, for the ease of connecting, in joint bottom, top, the lower end of the first plate body and the second plate body grows one section, for being connected with standard knot than the lower end of the 3rd plate body; The upper end of standard knot and bottom, correspondingly, the end of the 3rd plate body grows one section than the end of the first plate body and the second plate body, in the upper end of bottom joint, the lower end of the first plate body and the second plate body grows one section than the lower end of the 3rd plate body, for being connected with the bottom of standard knot; Such top joint and standard knot and bottom are saved and can be coupled together.During installation, first crossbeam 7 and sliding seat 8 are erected on the aperture of stake holes, then by crossbeam and sliding seat, bottom joint is put into stake holes, and the 3rd plate body that the top saved bottom is protruded is connected with the second plate body that standard knot bottom is protruded, after completing the installation of bottom joint and standard knot, then move down, carry out the connection of top joint and standard knot again, the second plate body that standard knot top is protruded is connected with the 3rd plate body that joint bottom, top is protruded, namely the installation that standard knot and top are saved is completed, then the barrier assembly entirety connected is moved down, bottom joint is contacted with the bottom of stake holes, namely the installation of isolator in stake holes is completed.If standard knot itself is longer, be made up of several merogenesis, then need each joint to link together in installation process.
3) cast forms pile foundation
Putting into the stake holes casting cement concrete of isolator, to form pile foundation, see Fig. 9, wherein, the peripheral diameter of isolator should be less than stake holes diameter and be about about 50mm and just can put into, period is poured at cement concrete, assembly 61 and the assembly 62 of the automatic-separation mechanism that clamping ring is arranged are subject to cement concrete and impact and be separation trend, easily broken broken screw is driven in separation process, final assembly 61 is thoroughly separated with assembly 62, make by assembly 61, each segment body of 62 clamping rings connected is separated, each split of the isolator be attached thereto is driven to move to the position of loess retaining wall, space between 3rd plate body and loess retaining wall is eliminated, 3rd plate body and loess retaining wall are close to, reach the designing requirement of pile foundation.
2, the second plate body and the 3rd plate body is extracted
See Figure 10, Figure 11, at pile foundation cement concrete after the assay was approved, adopt loop wheel machine 12 that vibrating hammer 11 and hydraulic clip 10 are hung tight, 3rd plate body protrudes from a pile foundation part, hydraulic clip 10 can clamp this ledge of the 3rd plate body, and Vibration on Start-up hammer utilizes underground water to make lubricating system and the 3rd plate body in isolator split and the second plate body of being attached thereto are extracted.Automatically disconnect connect the easily broken screw under tension of the second plate body and the first plate body in withdrawal process after, the first plate body and the clamping ring be arranged on inside the first plate body and automatic-separation mechanism are retained in pile foundation.Remaining second plate body and the 3rd school body can be extracted as stated above, can reuse.
3, steel pile casting is extracted
1) loosen the soil
See Figure 12,13, after extracting the second plate body and the 3rd plate body, utilize hydraulic clip 10 to clamp Larsen steel plate 13, then by the effect of vibration of vibrating hammer 11, Larsen steel plate is shaken into 12-16 rice in steel pile casting circumferential perimeter, periphery earth is shaken pine;
2) pull steel protective-cylinder
See Figure 14, Figure 15, during use, start hydraulic clip, locking steel pile casting, adopt large-scale crane that vibrating hammer is hung tight, opening power, startup Hydraulic Station, open hand-operated valve c, telescopic hydraulic oil cylinder 16a upwards jacking first segment, top lifting height is 1.8M.After first segment completes, open hand-operated valve f, the downward jacking first segment of telescopic hydraulic oil cylinder 16b, top lifting height is 1.8M.Save jacking through telescopic hydraulic oil cylinder 16a, 16b two, steel pile casting completes top lifting height 3.6M; Open hand-operated valve c again, telescopic hydraulic oil cylinder 16a upwards jacking second section, top lifting height is 1.6M, after second section completes, opens hand-operated valve f, the downward jacking of telescopic hydraulic oil cylinder 16b, and second section top lifting height is 1.6M.After second section jacking completes, through twice jacking, the own top lifting height of steel pile casting is to 6.8M, and other joint numbers have also operated by above-mentioned steps, repeat no more herein.Through each four joint jackings of telescopic hydraulic oil cylinder 16a, 16b, the total top lifting height of steel pile casting is to 12M, by hand-operated valve d, e, telescopic hydraulic oil cylinder oil cylinder 16a, 16b are returned, after first paragraph work completes, oxygen cutting or other equipment can be adopted to carry out cutting section to steel pile casting, and the steel pile casting cut can adopt loop wheel machine to transport, first paragraph work completes, and residue steel pile casting can complete by above-mentioned steps section construction.
In the present embodiment, use to the steel pile casting being embedded in underground be extracted turnover, because the space in steel pile casting is less, the degree of depth is comparatively dark, so adopt telescopic hydraulic oil cylinder.Telescopic hydraulic oil cylinder is divided into four joints that work, and first segment effective travel is 1.8M, and second section effective travel is 1.6M, and Section of three effective travel is 1.4M, and Section of four effective travel is 1.2M, and the total kilometres of each telescopic hydraulic oil cylinder are 6M.Due to steel pile casting, to be embedded in underground darker, sandy soil layer frictional resistance is larger, in use telescopic hydraulic cylinder jacking process, adopt the mode of merogenesis jacking, the first segment of telescopic hydraulic oil cylinder is basic pressure, the pressure of the relative first segment of pressure of second section decreases, merogenesis why is in use wanted to carry out jacking, because after the work of jacking first segment completes, the steel pile casting be embedded in sandy soil layer also reduces relatively, frictional resistance also reduces relatively, telescopic hydraulic oil cylinder adopts merogenesis jacking, steel pile casting frictional resistance constantly reduces, steel pile casting is also just extracted naturally smoothly.
Above to invention has been detailed introduction, applying specific case and setting forth principle of the present invention and embodiment in literary composition, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (6)
1. a pile foundation construction components apart device, it is characterized in that, involving vibrations hammer mechanism, for vibrating hammer mechanism upwards rise provide the hydraulic jacking system of power, the opening and closing of hydraulic control jack-up system oil circuit Hydraulic Station and for clamp construction assembly hydraulic clip, described hydraulic jacking system comprises telescopic hydraulic oil cylinder group, described telescopic hydraulic oil cylinder group comprises at least two pairs of telescopic hydraulic oil cylinders, in often pair of telescopic hydraulic oil cylinder, two telescopic hydraulic oil cylinders are setting up and down and the piston rod of two telescopic hydraulic oil cylinders is mirror image is connected to together; Described telescopic hydraulic oil cylinder adopts merogenesis jacking.
2. pile foundation construction components apart device as claimed in claim 1, it is characterized in that, described hydraulic jacking system also comprises hydraulic pressure holder, and in often pair of telescopic hydraulic oil cylinder, one of them is connected with hydraulic pressure holder, and another is connected with vibrating hammer mechanism.
3. pile foundation construction components apart device as claimed in claim 1, is characterized in that, described vibrating hammer mechanism involving vibrations hammer and the vibrating hammer bearing be positioned at below vibrating hammer.
4. pile foundation construction components apart device as claimed in claim 2, is characterized in that, described vibrating hammer mechanism involving vibrations hammer and the vibrating hammer bearing be positioned at below vibrating hammer, another telescopic hydraulic oil cylinder is connected with described vibrating hammer bearing.
5. pile foundation construction components apart device as claimed in claim 2, it is characterized in that, described hydraulic jacking system also comprises several piston oil-cylinders, is connected with described hydraulic pressure holder.
6. pile foundation construction components apart device as claimed in claim 1, it is characterized in that, the pipeline between hydraulic jacking system and Hydraulic Station is provided with hand-operated valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210119551.0A CN102628272B (en) | 2012-04-20 | 2012-04-20 | Apparatus for separating construction component from pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210119551.0A CN102628272B (en) | 2012-04-20 | 2012-04-20 | Apparatus for separating construction component from pile foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102628272A CN102628272A (en) | 2012-08-08 |
| CN102628272B true CN102628272B (en) | 2015-02-04 |
Family
ID=46586651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210119551.0A Expired - Fee Related CN102628272B (en) | 2012-04-20 | 2012-04-20 | Apparatus for separating construction component from pile foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102628272B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2307824Y (en) * | 1997-04-28 | 1999-02-17 | 东台工程机械股份有限公司 | Hydraulic pipe drawing device |
| WO1999011871A1 (en) * | 1997-09-04 | 1999-03-11 | Stephen Chelminski | A method system and apparatus for driving and pulling pilings |
| CN2436554Y (en) * | 2000-06-30 | 2001-06-27 | 牧一征 | Vibration placing/removing machine for non-extruding pile wall-protecting pipe |
| WO2003097945A1 (en) * | 2002-05-17 | 2003-11-27 | Raunisto Yrjoe | A device producing hammering |
| CN2654688Y (en) * | 2003-11-27 | 2004-11-10 | 中铁工程机械研究设计院 | High frequency hydraulic vibration pile pulling sinker with pile picker |
| CN2837384Y (en) * | 2005-10-31 | 2006-11-15 | 上海五冶冶金建设有限公司机械化施工分公司 | Hydraulic lifting device |
| CN202577303U (en) * | 2012-04-20 | 2012-12-05 | 肇庆南桂钢模板有限公司 | Separating device for pile foundation construction assembly |
-
2012
- 2012-04-20 CN CN201210119551.0A patent/CN102628272B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2307824Y (en) * | 1997-04-28 | 1999-02-17 | 东台工程机械股份有限公司 | Hydraulic pipe drawing device |
| WO1999011871A1 (en) * | 1997-09-04 | 1999-03-11 | Stephen Chelminski | A method system and apparatus for driving and pulling pilings |
| CN2436554Y (en) * | 2000-06-30 | 2001-06-27 | 牧一征 | Vibration placing/removing machine for non-extruding pile wall-protecting pipe |
| WO2003097945A1 (en) * | 2002-05-17 | 2003-11-27 | Raunisto Yrjoe | A device producing hammering |
| CN2654688Y (en) * | 2003-11-27 | 2004-11-10 | 中铁工程机械研究设计院 | High frequency hydraulic vibration pile pulling sinker with pile picker |
| CN2837384Y (en) * | 2005-10-31 | 2006-11-15 | 上海五冶冶金建设有限公司机械化施工分公司 | Hydraulic lifting device |
| CN202577303U (en) * | 2012-04-20 | 2012-12-05 | 肇庆南桂钢模板有限公司 | Separating device for pile foundation construction assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102628272A (en) | 2012-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104563118B (en) | The pre-poured built pile construction method of full-sleeve vibration soil taking | |
| CN101761081A (en) | Construction method and equipment of holding and pressing type static-pressure driven cast-in-place pile | |
| CN102561329B (en) | Construction method of underwater concrete cast-in-place pipe pile | |
| CN104631442A (en) | Full casing pipe soil taking vibration construction method for squeezed and expanded cast-in-place pile | |
| CN102828507B (en) | The construction treating methods of major diameter cast-in-situ concrete composite pile | |
| CN102619220B (en) | Pile foundation construction method | |
| CN102345287A (en) | Construction method of large-diameter cast-in-situ thin-wall concrete composite pile and special hole forming device | |
| CN110004929A (en) | The reusable plucking apparatus of cast-in-situ bored pile steel pile casting in water | |
| CN202577303U (en) | Separating device for pile foundation construction assembly | |
| CN102628272B (en) | Apparatus for separating construction component from pile foundation | |
| CN103741690B (en) | A kind of soil plug compensates pile tube and extracts construction method and soil plug used compensation pile tube pile pulling device thereof | |
| CN108385674A (en) | High-bearing capacity thin-wall steel tube concrete pile construction method and device and its application | |
| CN102677657A (en) | Construction method of row cast thin-walled concrete compound pile wall and special hole forming device thereof | |
| CN202644520U (en) | Auxiliary component for pile foundation construction | |
| CN114319329B (en) | Anchor rod static pressure pipe pressing device and cast-in-place pile construction method | |
| CN102505691A (en) | Prefabricating pipe pile construction method | |
| CN103306276A (en) | New dry construction method for drilled (punched) hole filling pile surrounded by mud | |
| CN102619221B (en) | Pile foundation construction auxiliary assembly | |
| US20150299976A1 (en) | Method for manufacturing a pile | |
| JP2015187330A (en) | Construction method of cofferdam cum steel pipe sheet pile foundation | |
| CN202577304U (en) | Automatic segregator | |
| CN106567386A (en) | Pouring type pile driver and pile driving method therefor | |
| CN104018503B (en) | A kind of major diameter shakes the heavy tube drawing Static pressure pile driver of pipe boring and construction technology | |
| CN105178315A (en) | Pouring type pile driver and pile driving method using pile driver | |
| CN102808406A (en) | Construction method for row composite piling wall and special hole forming machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20170420 |