CN204298820U - A kind of single sleeve pile pulling device - Google Patents
A kind of single sleeve pile pulling device Download PDFInfo
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- CN204298820U CN204298820U CN201420684810.9U CN201420684810U CN204298820U CN 204298820 U CN204298820 U CN 204298820U CN 201420684810 U CN201420684810 U CN 201420684810U CN 204298820 U CN204298820 U CN 204298820U
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- sleeve
- steel wire
- neck ring
- pile pulling
- pulling device
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Abstract
A kind of single sleeve pile pulling device, described single sleeve pile pulling device mainly comprises a cylindric pile pulling sleeve, described sleeve lining is at least provided with collar together, or sleeve outer wall is at least provided with together outer collar, or sleeve outer wall be provided with inwall simultaneously together with outer collar, interior collar.Sleeve bottom arranges back cover component, and this back cover component comprises ring like steel wire rope and puts groove, spring storage tank in advance.Sleeve outer wall is provided with steel wire cable protective cover, little wire line thimble and upper uniform 4 fixing steel wire cables thereof; wherein 2 steel wire cable two ends are connected with little wire line thimble with sleeve lining respectively; other two steel wire cable one end are connected with little wire line thimble; one end leads directly to sleeve top by steel wire cable protective cover, and sleeve top is connected and fixed.The utility model equipment construction is simple, disposablely can pull out whole pile body, not stay hidden danger, convenient construction, save time, laborsaving, is that pile foundation construction creates convenience in the future.
Description
Technical field
The utility model belongs to construction implement technical field, be mainly used in the extending old building in city, resettlement, need stake old in the pile foundation in original ground, the pulling out of old basis, comprising the pile-type such as prefabricated pile, cast-in-place concrete pile, high-pressure rotary jet grouting pile, cement mixing pile, is one of core of the pile foundation technology pulled out in original ground.
Background technology
Along with the expansion of the danger aging blocks room in city, factory building, demolishing buildings cleaning, transformation, resettlement, the exploitation of the underground space are the problems that must solve to old concrete residual in original ground, pulling out of old pile foundation.Pull out original pile foundation in current engineering, adopt water under high pressure, high pressure gas, form mud at sleeve and original pile body, noise is large, time-consuming, effort, contaminated environment have certain potential safety hazard, there is certain deficiency.
Utility model content
The utility model object be solve to old concrete residual in original ground, old pile foundation pull out problem, a kind of single sleeve pile pulling device is provided.
Single sleeve pile pulling device that the utility model provides, auxiliary equipment comprises a whole set of vibration hammer equipment ripe in prior art and hydraulically operated fixture, and single sleeve pile pulling device described in addition mainly comprises a cylindric pile pulling sleeve (sleeve 0).Described sleeve lining is at least fixedly installed neck ring (sleeve 1) together; Or described sleeve outer wall is at least fixedly installed outer neck ring (sleeve 2) together; Or, described sleeve lining, outer wall to be at least fixedly installed together simultaneously neck ring with together with outer neck ring (sleeve 3).Specifically select the sleeve of which kind of version, the needs of, stake footpath long according to the stake of institute's pile pulling, geological conditions, select at the construction field (site) flexibly.
Described sleeve bottom is provided with a semiclosed back cover component simultaneously, and the annular wire rope that this back cover component comprises the setting of sleeve bottom inwall puts groove and spaced spring storage tank in advance.Spring storage tank upper end is provided with a spring and rope over cap, an extension spring that spring and rope over cap can be made to be in closed condition is provided with between bottom spring and rope over cap and spring storage tank, steel wire rope puts in groove the little wire line thimble having and be coiled in sleeve lining in advance, uniformly on little wire line thimble be fixed with 4 steel wire cables, wherein the two ends of 2 steel wire cables are fixedly linked with sleeve lining and little wire line thimble respectively, other 2 steel wire cable one end and little wire line thimble are fixedly linked, the steel wire cable protective cover that the other end is arranged in sleeve wall leads directly to sleeve top, this 2 steel wire cables are strained at top, steel wire cable drives little wire line thimble and other 2 steel wire cables, lower spring and rope over cap is pulled to open at steel wire cable, now little wire line thimble and other 2 steel wire cables are put in groove in advance from annular wire rope and are drawn out, semiclosed back cover structure is formed.
The effect of the extension spring arranged in spring storage tank is; under spring tension effect; spring and rope over cap are in closed condition; sleeve can be made like this when shaking and pile pulling is risen; the steel wire rope that steel wire cable is put in groove is not in advance disturbed by the soil body of sleeve in upper and lower process; being conducive to sleeve sinks down into when requiring the degree of depth, the smooth opening of semi-closed structure part.Sleeve pile pulling is complete, and after being promoted to earth's surface, taken out by pile body, then again kept in the center by semi-closed structure part, namely steel wire cable is put in groove in advance, and under the pulling force effect of spring, spring and rope over cap are closed again.
Described interior neck ring or outer neck ring were around the inside and outside wall of sleeve one week, and be highly 100mm ~ 500mm, thickness is 10mm ~ 50mm.For the sleeve being provided with neck ring or outer neck ring in multiple tracks, between described interior neck ring or outer neck ring, be spaced apart 2m ~ 10m.
Described sleeve wall is also provided with the aperture of many group diameter 4cm ~ 10cm, same group of aperture is evenly arranged in the barrel surface of sleeve sustained height.2m ~ 10m is spaced apart between each group of aperture that described sleeve wall is arranged.
Stake diameter large 100mm ~ 1000mm, sleeve underground length 1D ~ 5D larger than pile body length, D that described sleeve diameter ratio is to be transferred to are pile body diameter.
Advantage of the present utility model and good effect:
The utility model, for the drawback of prior art, have developed sleeve pile pulling device and sinking, pile pulling process technology, overcomes the defect of prior art.Sleeve pile pulling device and sinking, pile pulling process can be cleaned, at a high speed, effectively be gone to pull out various pile-type.
In sleeve stack shell, neck ring and arranging of outer neck ring can cut the sleeve medial and lateral soil body in construction, cut the soil body out with sleeve stack shell apart from becoming large, and the frictional force of the inside and outside wall of sleeve stack shell and the soil body is reduced greatly, thus reduce pile pulling power, convenient construction, substantially increases the operating efficiency of pile pulling.
The utility model equipment construction is simple, do not need mud circulation, at sleeve bottom, semi-closed structure component can be installed, form semiclosed back cover structure, according to the need of, if desired, this back cover structure can be opened, and opens disposablely to pull out whole pile body afterwards, does not stay hidden danger, convenient construction, save time, laborsaving, create convenience for pile foundation construction in the future.
Accompanying drawing explanation
Fig. 1 is ordinary cartridge 0 schematic diagram not with outer neck ring, interior neck ring.
Fig. 2 is sleeve 1 schematic diagram with interior neck ring, and in middle part, neck ring is 11, neck ring is 14 in bottom.
Fig. 3 is sleeve 2 schematic diagram with outer neck ring, and outside middle part, neck ring is 22, neck ring is 23 outside bottom.
Fig. 4 be middle and bottom while with sleeve 3 schematic diagram of outer neck ring and interior neck ring, outside middle part, neck ring is 32, neck ring is 31 in middle part, neck ring is 33 outside bottom, neck ring is 34 in bottom.
Fig. 5 is that pile body 4 coordinates schematic diagram with ordinary cartridge 0;
Fig. 6 is that pile body 4 coordinates schematic diagram with the sleeve 2 with outer neck ring;
In figure, 13 is the apertures organizing diameter 4cm ~ 10cm more, and same group of aperture is evenly arranged in the barrel surface of sleeve sustained height.
Fig. 7 is that the steel wire cable in the semiclosed back cover component of sleeve bottom does not open side-looking state diagram; See detail drawing 11
4 is pile body; Steel wire cable 6 prevents to put in groove 18 in advance at steel wire rope; 7 is the steel wire cable protective cover in sleeve wall; 8 for being spring and rope over cap; 9 is spring; 10 is spring storage tank; 12 is sleeve top pile pulling steel wire rope;
Sleeve 1 (2,3) fingerstall cylinder 1, sleeve 2 or sleeve 3;
Fig. 8 is that the steel wire cable in the semiclosed back cover component of sleeve bottom has opened side-looking state diagram; See detail drawing 12
4 is pile body; Steel wire cable 6 is opened; 7 is the steel wire cable protective cover in sleeve wall; 10 is spring storage tank; 12 is sleeve top pile pulling steel wire rope; 18 put groove in advance for steel wire rope, are in blank state; Sleeve 1 (2,3) fingerstall cylinder 1, sleeve 2 or sleeve 3;
Fig. 9 is that the steel wire cable in the semiclosed back cover component of sleeve bottom is not opened and overlooked state diagram;
Steel wire cable 6 is positioned at steel wire rope and puts groove 18 in advance; 7 is the steel wire cable protective cover in sleeve wall; 9 is spring; 12 is sleeve top pile pulling steel wire rope; 18 put groove in advance for steel wire rope;
Figure 10 is that the steel wire cable in the semiclosed back cover component of sleeve bottom has been opened and top view under being in tension;
In figure, 6 is the steel wire cable in semiclosed back cover component, opens; 7 is the steel wire cable protective cover in sleeve wall; 9 is spring, and 15 for after semi-closed structure part opens, the little wire line thimble formed under a stretching force; 18 put groove in advance for steel wire rope, and steel wire cable is opened, and are in blank state;
Figure 11: the detail drawing when steel wire cable in the semiclosed back cover component of sleeve bottom is not opened.
Steel wire cable 6 prevents to put in groove 18 in advance at steel wire rope; 7 is the steel wire cable protective cover in sleeve wall; 8 for being spring and rope over cap; 9 is spring; 10 is spring storage tank;
Figure 12: the detail drawing when steel wire cable in the semiclosed back cover component of sleeve bottom is opened.
Steel wire cable 6 is opened; Rope over cap 8 is opened; 10 is spring storage tank; 12 is sleeve top pile pulling steel wire rope; 18 put groove in advance for steel wire rope, are in blank state;
Figure 13 is that sleeve 1 (2,3) sinks, opens closure structures 6, upper pile pulling body process schematic;
Detailed description of the invention
One, single sleeve pile pulling device
Single sleeve pile pulling device that the utility model provides, auxiliary equipment comprises a whole set of vibration hammer equipment ripe in prior art and hydraulically operated fixture, and single sleeve pile pulling device described in addition mainly comprises a cylindric pile pulling sleeve, and sleeve is divided into following several:
As the sleeve 0 in Fig. 1, its outer wall does not establish outer neck ring, inwall not to establish interior neck ring.
As the sleeve 1 in Fig. 2, the top of inwall, centre and bottom are provided with interior neck ring, and top and middle interior neck ring are 11, neck ring is 14 in bottom.
As the sleeve 2 in Fig. 3, the top of outer wall, centre are provided with outer neck ring 22, and outside bottom, neck ring is 23.
As the sleeve 3 in Fig. 4, the top of outer wall is provided with outer neck ring 32, and the centre of inwall is provided with interior neck ring 31, and it is 33 and interior neck ring 34 that the outer wall of bottom and inwall are provided with outer neck ring simultaneously.
Fig. 5 is that ordinary cartridge 0 extracts pile body 4;
Fig. 6 is that namely sleeve 2 will extract pile body 4;
In Fig. 5, Fig. 6,13 is the apertures organizing diameter 4cm ~ 10cm more, and same group of aperture is evenly arranged in the barrel surface of sleeve sustained height.
Fig. 7 installs semiclosed back cover component in the bottom of sleeve 1,2,3, and sleeve sinks down into pile body lower end, the state that semiclosed back cover component is not opened.
Fig. 8: sleeve 1 (2,3) sinks to designated depth; when top tense wire rope 12; under a stretching force; steel wire rope 12 is by steel wire cable protective cover 7; pull the steel wire cable 6 of semiclosed back cover structure; the steel wire cable 6 of the semiclosed back cover structure below pile body 4 is opened, and semiclosed back cover structure is formed.During pile pulling, pile body weight transfer gives the steel wire cable 6 of semiclosed back cover structure, then passes to sleeve 1 (2,3) by the steel wire cable 6 of semiclosed back cover structure.Steel wire cable protective cover in sleeve wall, through to the top of sleeve.
Accompanying drawing 9: steel wire cable 6 is not opened, is now positioned at steel wire cable and puts groove 18 in advance.
Accompanying drawing 10: steel wire cable 6 (little wire line thimble) is opened.Uniformly on little wire line thimble be fixed with 4 steel wire cables; wherein the two ends of 2 steel wire cables are connected with little wire line thimble with sleeve lining respectively; other 2 steel wire cable one end are connected with little wire line thimble; the other end leads directly to sleeve top through steel wire cable protective cover; this 2 steel wire cables are strained at top; steel wire cable drives little wire line thimble and other 2 steel wire cables, and little wire line thimble and other 2 steel wire cables are put in groove in advance from annular wire rope and are drawn out, and semiclosed back cover structure is formed.
Steel wire cable protective cover 7 in sleeve wall, through to the top of sleeve.
Bush material can be made by rigid materials such as stainless steel, steel, iron, copper, aluminium oxide.
A whole set of vibration hammer equipment () in figure slightly.
Hydraulically operated fixture () is mainly used to clamp sleeve top in figure slightly, and sleeve can be moved freely upper and lower, left and right.
1, the sleeve that the utility model provides has Multiple Type, specifically selects the sleeve of which kind of version, and the needs of, stake footpath long according to the stake of institute's pile pulling, geological conditions, select at the construction field (site) flexibly, respectively:
(0) outer wall does not arrange the ordinary cartridge that outer neck ring, inwall do not arrange interior neck ring, as Fig. 1.
(1) outer wall does not arrange outer neck ring, and inwall arranges the sleeve of interior neck ring, as Fig. 2.
(2) outer wall arranges outer neck ring, and inwall does not arrange the sleeve of interior neck ring, as Fig. 3.
(3) outer wall arranges outer neck ring, and inwall arranges the sleeve of interior neck ring, as Fig. 4.
(4) sleeve bottom in (1), (2), (3) installs the back cover component of special construction, forms semiclosed back cover structure, as Fig. 7 and Fig. 8.
Such as: if pull out sleeve and pile body simultaneously, the sleeve adopting (0) or (2) form is needed; If first pull out sleeve, then pile pulling body, need the sleeve adopting (1) or (3) form.Also sleeve shown in (4) can be adopted.
2, sleeve wall is arranged the aperture 13 of many group diameter 4cm ~ 10cm, same group of aperture is evenly arranged in the barrel surface of sleeve sustained height, avoid sleeve sinking or on pull out in process with the effect of soil body generation vacuum suction, 2m ~ 10m of being separated by between each group aperture.
3, to sleeve shown in (1), (3), its inwall, every 2m ~ 10m, arranges one or multi-channel interior neck ring.To sleeve shown in (2), (3), its outer wall, every 2m ~ 10m, arranges one or multi-channel outer neck ring.The concrete distance of outer neck ring and interior neck ring is long according to stake, stake footpath and soil mass property decide, and such as at softer muck soil, spacing distance shortens, and at the argillic horizon that plasticity is stronger, spacing distance is larger.Interior neck ring and outer neck ring were around the inside and outside wall of sleeve one week, and height 100mm ~ 500mm, thickness 10mm ~ 50mm, concrete height and thickness, decide according to soil mass property.Its effect is in hammering sinking watching, sleeve stack shell and interior neck ring, outer neck ring cut the sleeve medial and lateral soil body, cut the soil body out with sleeve stack shell apart from becoming large, and the frictional force of the inside and outside wall of sleeve stack shell and the soil body is reduced greatly, thus reduce pile pulling power, convenient construction, substantially increases the operating efficiency of pile pulling.
4, sleeve diameter 100mm ~ 1000mm larger than stake diameter to be extracted, concrete size is long according to stake, stake footpath and soil mass property decide.Sleeve underground length 1D ~ 5D (pile body diameter) larger than pile body length, concrete size is long according to stake, stake footpath and soil mass property decide.
5, install special back cover component at sleeve bottom, form semiclosed back cover structure, during pile pulling, pile body and the soil body gravity be attached on pile body are born by semiclosed back cover structure and sleeve.Especially, when the withdrawal resistance of pile body self is not enough to bear suffered larger withdrawal resistance, pile body can rupture, and now bears pressure by semiclosed back cover structural member.
6, the effect of outer neck ring: under a bushing in heavy process, the soil body outside further cutting sleeve, when there is space between the soil body outside sleeve outer wall and its, between the soil body and sleeve outer wall, frictional force disappears, even if the soil body outside sleeve has resilience to sleeve outer wall direction, and contact with sleeve outer wall, now frictional force is also than originally greatly reducing.
The effect of interior neck ring: under a bushing in heavy process, interior neck ring cuts the sleeve lining soil body, make to occur space between the soil body and sleeve lining, between the soil body and sleeve lining, frictional force disappears, even if the soil body inside sleeve has resilience to sleeve lining direction, and contact with sleeve lining, now frictional force is also than originally greatly reducing.
7, the effect 1 of sleeve: under a bushing in heavy process, sleeve wall, interior neck ring, outer neck ring cut the sleeve medial and lateral soil body, reduce or eliminate the cohesive force of sleeve medial and lateral frictional resistance and stake end and supporting course soil.
Sleeve effect 2: during pile pulling, if there is part pile body to stay in the soil body, sink sleeve again, utilizes the frictional resistance of sleeve and pile body and pile peripheral earth, when extracting sleeve, is jointly pulled out together with pile body.
Sleeve effect 3: support the outside soil body.
8, when the steel wire cable of the semiclosed back cover structure of sleeve bottom installation is opened, back cover structure is formally formed, and during pile pulling, pile body and the soil body weight be attached on pile body are born by steel wire cable, and the pressure that steel wire cable bears passes to sleeve.
Two, the process that sleeve sinks, pile body is pulled out:
1, excavate stake top earthing, expose stake top.According to long, the stake footpath of stake, geological conditions, select sleeve flexibly.Such as select with outer neck ring, interior neck ring, sleeve bottom with the sleeve of semi-closed structure part simultaneously.Or select without outer neck ring, interior neck ring, and sleeve bottom is with the sleeve of semi-closed structure part.
2, use vibration hammer and fixture to clamp sleeve, make bushing core align piles center, Vibration on Start-up is hammered into shape, shakes sleeve by the place of stake top.
3, vibrations limit in sleeve limit sinks, and rule of thumb, can advance during sleeve sinks along pile body direction, if find that sleeve has skewness serious, adjusts tup direction at any time.
4, the sinking watching of sleeve is also sleeve wall, outer neck ring, interior neck ring cut the process of pile peripheral earth, when sinking down into the required degree of depth, namely sleeve bottom exceed with stake bottom 1D ~ 5D (D is pile body diameter) distance time, stop sinking.Now, pile body is encased completely by sleeve.
5, keep original position constant, fully shake certain hour, by vibrations sleeve, outer neck ring, interior neck ring cut pile peripheral earth, make the side friction of the inside and outside wall of sleeve and the cohesive force of stake end and supporting course soil greatly reduce even to disappear.
6, start pile pulling device, prepare pile pulling work.
Before sleeve starts to promote pile pulling, the steel wire rope 12 of tension on sleeve top, the semi-enclosed back cover component of sleeve bottom is opened (as Figure 10), pile body and the soil body deadweight be attached on pile body are born jointly by back cover component and sleeve, the pressure that semiclosed back cover component bears is delivered on sleeve again, on when pulling out sleeve, pile body together by pull out to earth's surface (as Figure 11).
On pull out earth's surface after, then sleeve and pile body are lain on the ground, now, the side friction between sleeve wall and pile body reduces, and utilizes hydraulic test or other plant equipment to be pulled out from sleeve by pile body.
Backfill soil is carried out to the stake holes of extracting, and tamps.
Claims (10)
1. a single sleeve pile pulling device, is characterized in that described sleeve pile pulling device mainly comprises a cylindric pile pulling sleeve, described sleeve bottom is provided with a semiclosed back cover component simultaneously, and the annular wire rope that this back cover component comprises the setting of sleeve bottom inwall puts groove and spaced spring storage tank in advance, spring storage tank upper end is provided with a spring and rope over cap, between bottom spring and rope over cap and spring storage tank, an extension spring that spring and rope over cap can be made to be in closed condition is set, steel wire rope puts in groove the little wire line thimble having and be coiled in sleeve lining in advance, uniformly on little wire line thimble be fixed with 4 steel wire cables, wherein the two ends of 2 steel wire cables are fixedly linked with sleeve lining and little wire line thimble respectively, other 2 steel wire cable one end and little wire line thimble are fixedly linked, the steel wire cable protective cover that the other end is arranged in sleeve wall leads directly to sleeve top.
2. single sleeve pile pulling device according to claim 1, is characterized in that described sleeve lining is at least fixedly installed neck ring together.
3. single sleeve pile pulling device according to claim 1, is characterized in that described sleeve outer wall is at least fixedly installed outer neck ring together.
4. single sleeve pile pulling device according to claim 2, is characterized in that described sleeve outer wall is at least fixedly installed outer neck ring together simultaneously.
5. single sleeve pile pulling device according to claim 2, it is characterized in that described interior neck ring was around sleeve lining one week, be highly 100mm ~ 500mm, thickness is 10mm ~ 50mm.
6. single sleeve pile pulling device according to claim 4, it is characterized in that described outer neck ring was around sleeve outer wall one week, be highly 100mm ~ 500mm, thickness is 10mm ~ 50mm.
7. the single sleeve pile pulling device according to claim 4 or 6, is characterized in that the sleeve for being provided with neck ring or outer neck ring in multiple tracks, is spaced apart 2m ~ 10m between described interior neck ring or outer neck ring.
8. the single sleeve pile pulling device according to any one of claim 1 to 6, it is characterized in that the aperture described sleeve wall being provided with many group diameter 4cm ~ 10cm, same group of aperture is evenly arranged in the barrel surface of sleeve sustained height.
9. single sleeve pile pulling device according to claim 8, is characterized in that being spaced apart 2m ~ 10m between each group of aperture that described sleeve wall is arranged.
10. the single sleeve pile pulling device according to any one of claim 1 to 6 or 9, it is characterized in that described sleeve diameter compares stake diameter to be transferred to large 100mm ~ 1000mm, sleeve underground length 1D ~ 5D larger than pile body length, D is pile body diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420684810.9U CN204298820U (en) | 2014-11-17 | 2014-11-17 | A kind of single sleeve pile pulling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420684810.9U CN204298820U (en) | 2014-11-17 | 2014-11-17 | A kind of single sleeve pile pulling device |
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| Publication Number | Publication Date |
|---|---|
| CN204298820U true CN204298820U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420684810.9U Active CN204298820U (en) | 2014-11-17 | 2014-11-17 | A kind of single sleeve pile pulling device |
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| CN (1) | CN204298820U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790397A (en) * | 2015-05-05 | 2015-07-22 | 张继红 | Sleeve method damaged pile treatment and construction method and construction device using same |
| CN108797592A (en) * | 2018-06-28 | 2018-11-13 | 中交上海航道局有限公司 | A kind of Two bors d's oeuveres channel steel applied to building structure pile foundation assists pile pulling device |
| CN108842773A (en) * | 2018-06-28 | 2018-11-20 | 中交上海航道局有限公司 | A kind of single sleeve auxiliary pile pulling device applied to building structure pile foundation |
-
2014
- 2014-11-17 CN CN201420684810.9U patent/CN204298820U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790397A (en) * | 2015-05-05 | 2015-07-22 | 张继红 | Sleeve method damaged pile treatment and construction method and construction device using same |
| CN108797592A (en) * | 2018-06-28 | 2018-11-13 | 中交上海航道局有限公司 | A kind of Two bors d's oeuveres channel steel applied to building structure pile foundation assists pile pulling device |
| CN108842773A (en) * | 2018-06-28 | 2018-11-20 | 中交上海航道局有限公司 | A kind of single sleeve auxiliary pile pulling device applied to building structure pile foundation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 300191 No. 428 Hongqi South Road, Tianjin, Nankai District Patentee after: Tianjin survey and Design Institute Group Co., Ltd Patentee after: TIANJIN BOCHUAN GEOTECHNICAL ENGINEERING Co.,Ltd. Address before: 300191 No. 428 Hongqi South Road, Tianjin, Nankai District Patentee before: Kanjoin in Tianjin City Patentee before: TIANJIN BOCHUAN GEOTECHNICAL ENGINEERING Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |