CN202925578U - Rapid connecting piece for use in pile foundation static load detection - Google Patents
Rapid connecting piece for use in pile foundation static load detection Download PDFInfo
- Publication number
- CN202925578U CN202925578U CN 201220633472 CN201220633472U CN202925578U CN 202925578 U CN202925578 U CN 202925578U CN 201220633472 CN201220633472 CN 201220633472 CN 201220633472 U CN201220633472 U CN 201220633472U CN 202925578 U CN202925578 U CN 202925578U
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- connector
- reinforcing steel
- presstressed reinforcing
- pile foundation
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Abstract
The utility model discloses a rapid connecting piece for use in pile foundation static load detection. The rapid connecting piece comprises a prestressed tendon for connecting and sub-connectors, wherein at least one end part of the prestressed tendon for connecting can be in axial stopping connection with the sub-connectors; one ends, which are back to the prestressed tendon for connecting, of the sub-connectors are provided with positioning holes of which the diameter can contract; and adjusting pieces are arranged, and can be used for adjusting the diameters of the positioning holes. Through the sub-connectors on the end part of the prestressed tendon for connecting, rapid and detachable connection with pile foundation steel bars is realized, the connecting speed is high, the connecting positions between the steel bars and the sub-connectors are convenient to adjust, pile bolck steel bars are stressed uniformly, convenience is brought to connection, high-rise operation can be avoided, the working difficulty and working risk are lowered, materials are saved, material waste is avoided, repeated detection can be performed, and the detection success rate is increased.
Description
Technical field
The utility model relates to a kind of static load of pile foundation checkout equipment, Quick connection part during particularly a kind of static load of pile foundation detects.
Background technology
it is to detect of paramount importance project as foundation that static load of pile foundation provides an important means of parameter and measurement pile foundation construction quality as Pile Foundations Design all the time, in recent years, fast development along with China's economy, be subjected to the restriction in soil and the needs of civil air defense constructions and installations, China's building has presented upwards more and more higher, downward deeper and deeper developing state, correspondingly more and more to the pile foundation engineering amount, and vertically pulling-resistant bearing capacity and vertical compression requirement for bearing capacity to single pile are more and more higher, adopt in the single pile vertical resistance pressure bearing capacity in anchored pile-testing method detection and unit for single-pile vertical anti-pulling loading test, how will be connected with the girder of test for the stake of bearing resistance to plucking, success is carried out balance with the power that uplift resistance and jack apply, the speed of pile foundation detection and the successful of test will directly be affected, two kinds of detection methods commonly used are respectively anchored pile-testing method detection and uplift pile detection at present, below these two kinds of detection methods are introduced:
According to " architecture foundation pile detection technique rules ", anchored pile-testing method in the single pile vertical resistance pressure loading test is to provide counter-force by anchoring pile, anchoring pile is by being delivered to power on girder, provide counter-force to be used to apply the load of test pile by girder, (typical force diagram is seen Fig. 1), its key that whether tests successfully is whether the uplift resistance of anchoring pile meets the demands and how anchoring pile effectively offers girder with counter-force.
For the anchored pile-testing method in the single pile vertical resistance pressure loading test, it is relatively simple that the detection of uplift pile loads, its basic principle is that the counter-force of resistance to plucking is provided by two piers, pass through girder, by the jack load application, jack is arranged by dual mode usually: the two ends jack loads; Middle jack loads, and (typical force diagram is seen Fig. 2) its key that whether tests successfully is whether the bearing capacity of foundation soil of buttress point meets the demands and how uplift pile effectively offers girder with counter-force.
By to two kinds of test method introductions, can find a general character how be exactly girder effectively to be connected with the stake that is used for providing resistance to plucking whether successfully directly determining to detect.
According in recent years anchored pile-testing method being detected and uplift pile detection finding, test in two kinds of detection methods is to weld or mechanical connection by stake top reinforcing bar and connecting reinforcement one end with girder and the stake power transmission that uplift effect is provided, the other end of connecting reinforcement correspondingly with girder on (or jack top, this kind situation appear at the jack of uplift pile in detecting in the middle of load mode) extension blue welding or adopt the nut mechanical connection.
This kind method connects the following problem that mainly exists:
1, during load application, owing to all being rigidly connected, can occur that the reinforcing bar that part connects is long, the part reinforcing bar is short, stake top reinforcing steel bar bear is inhomogeneous, thereby can cause the part reinforcing bar to destroy in advance, thereby causes detecting unsuccessfully;
2, for being welded to connect, need to consume a large amount of welding rod and artificial, especially in the detection of high tonnage, often this just needs cost a plurality of artificial, when especially the indigo plant of the extension on carrying out girder is connected with reinforcing bar, owing to belonging to senior engineer's operation, also can cause the accident generations such as falling of employee.
3, for mechanical connection, for welding, reduced welding, also corresponding meeting reduces much manually, but must reserve silking at stake top reinforcing bar and connecting reinforcement, is used for mechanical connection, and these are reserved silking and all will can not use in follow-up use, have also caused certain waste.
4, no matter be mechanical connection or be welded to connect, all need to use connecting reinforcement, these reinforcing bars because welding section is all cut, substantially all can't be reused thereby make when detecting next time after the complete pile of every detection again, thereby lot of materials and the wasting of resources have also been caused, and for mechanical connection, if it is bad to reserve the silking design, also can cause connection highly not to be inconsistent, cause again and make, produce unnecessary waste
5, in above connection, all adopted and hung indigo plant, especially in being welded to connect, hang the deadweight of source body larger, often all needing when mounted to use crane just can install, increased difficulty, on the other hand, due to frequent welding, part is hung indigo plant and is just damaged after using several times, on the other hand, be all directly to be placed on girder owing to hanging indigo plant, and sectional dimension is greater than girder, if a side reinforcing bar destroys, can cause and hang the uneven stressed of indigo plant, thereby cause the generation quality accident of dropping of hanging indigo plant, also cause the failure that detects.
Summary of the invention
In order to make up above deficiency, the utility model provides Quick connection part in a kind of static load of pile foundation detection, during this static load of pile foundation detects, Quick connection part has realized that the pile foundation reinforcing bar is connected with detection the quick of girder, has reduced the work risk, has saved material, and the success that is conducive to static loading test is carried out.
The utility model for the technical scheme that solves its technical problem and adopt is: Quick connection part during a kind of static load of pile foundation detects, comprise and connecting with presstressed reinforcing steel and sub-connector, at least one end of described connection use presstressed reinforcing steel can axial retention be connected with sub-connector, the end that sub-connector connects dorsad with presstressed reinforcing steel is provided with the locating hole that a diameter can shrink, be provided with an adjustment part, this adjustment part can be adjusted the locating hole diameter.
As further improvement of the utility model, it is flexible connecting with presstressed reinforcing steel, and its two ends are connected with a sub-connector axial retention respectively.
As further improvement of the utility model, described connection with the structure that presstressed reinforcing steel and sub-connector can axial retention be connected is: described sub-connector also is provided with towards an end that connects with presstressed reinforcing steel the locating hole that a diameter can shrink, also be provided with the adjustment part that can adjust this locating hole diameter, connection can be dismantled stop with presstressed reinforcing steel and is inserted in locating hole.
As further improvement of the utility model, the structure that described adjustment part can be adjusted the locating hole diameter is: the end of described sub-connector is provided with the first voussoir of an axial retention, it is inboard that locating hole is positioned at the first voussoir, this the first voussoir sidewall offers at least one cracking along generatrix direction, described voussoir lateral wall is provided with screw thread, adjustment part is the wedged hole of inside wall and the first voussoir coupling, is provided with internal thread in this wedged hole, and described adjustment part is threaded with wedged hole.
As further improvement of the utility model, also be provided with the second voussoir of an axial retention in described sub-connector, be arranged with a wedge-shaped sleeve that matches outside this second voussoir, also be installed with one in sub-connector and tighten up platform, the described platform that tightens up is provided with the through hole that presstressed reinforcing steel for connection wears, tighten up platform and be positioned at the second voussoir towards a side that connects with presstressed reinforcing steel, also be provided with a spanner, handle and the wrench body of described spanner are axially arranged with angle along sub-connector, and described wrench body is located in wedge-shaped sleeve and tightens up between platform.
As further improvement of the utility model, the little end of the end relative diameter that described first and second voussoir diameter is large is towards the sub-connector axial inner.
As further improvement of the utility model, described connection with the structure that presstressed reinforcing steel and sub-connector can axial retention be connected is: sub-connector is provided with a connecting hole towards an end that connects with presstressed reinforcing steel, described connection is inserted in this connecting hole with presstressed reinforcing steel, and it is inboard in the end wall of this end of sub-connector by connector backstop to connect an end that stretches in connecting hole with presstressed reinforcing steel.
As further improvement of the utility model, connection with presstressed reinforcing steel only an end be connected with the sub-connector axial retention, also be provided with one and hang indigo plant, hang indigo plant and be provided with some perforation, described connection with presstressed reinforcing steel dorsad an end of sub-connector be inserted in this perforation, connect stretch out perforation with presstressed reinforcing steel the end by connector backstop outside the sidewall of hanging blue sub-connector dorsad.
As further improvement of the utility model, on described extension basket, two rows are lined up in perforation, and this two row is corresponding and be arranged in parallel one by one.
As further improvement of the utility model, also be provided with flexible steel plate, described flexible steel plate surface is coated with lubrication oil, connects to walk around with presstressed reinforcing steel the surface that flexible steel plate scribbles lubrication oil.
Useful technique effect of the present utility model is: the utility model is realized being connected with the quick distachable of pile foundation reinforcing bar by the sub-connector of connection presstressed reinforcing steel end, its connection speed is fast, the link position of reinforcing bar and sub-connector is easy to adjust, guarantees that a top reinforcing steel bar bear is even, and it is easy to connect, can avoid work high above the ground, reduce work difficulty and work risk, saved material, avoided waste of material, but duplicate detection has improved the chance of success that detects.
Description of drawings
Fig. 1 is that anchored pile-testing method detects schematic diagram;
Fig. 2 is that uplift pile detects schematic diagram;
Fig. 3 all establishes the detection principle schematic of sub-connector with presstressed reinforcing steel two ends for this connection;
Fig. 4 establishes the detection principle schematic of sub-connector with presstressed reinforcing steel one end for this connection;
Fig. 5 is sub-connector the first syndeton schematic diagram;
Fig. 6 be in Fig. 5 A-A to cutaway view Amplified image;
Fig. 7 is sub-connector the second syndeton schematic diagram;
Fig. 8 is for hanging blue front view;
Fig. 9 is for hanging blue top view.
The specific embodiment
embodiment: Quick connection part during a kind of static load of pile foundation detects, comprise and connecting with presstressed reinforcing steel 1 and sub-connector 2, at least one end of described connection use presstressed reinforcing steel 1 can axial retention be connected with sub-connector 2, the end that sub-connector 2 connects dorsad with presstressed reinforcing steel 1 is provided with the locating hole 3 that a diameter can shrink, be provided with an adjustment part 4, this adjustment part 4 can be adjusted locating hole 3 diameters, during use, connect to be connected with detection girder 12 with presstressed reinforcing steel 1 and (connect with presstressed reinforcing steel 1 when selecting, select than the 13 high reinforcing bars of thick intensity of reinforcing bar on pile foundation, avoid it to destroy in advance), connection use presstressed reinforcing steel 1 end is connected with sub-connector 2, then in the locating hole 3 that the reinforcing bar on pile foundation is inserted, with adjustment part 4 with locating hole 3 reduced, and then clamping reinforcing bar, this has just realized fast the pile foundation reinforcing bar and has detected being connected of girder 12, can determine clamped position according to the length of different reinforcing bars in connection procedure, guarantee that every reinforcing bar is all stressed even, and the mode that this kind is fixedly clamped, a large amount of connection work of having avoided welding to be connected with screw fixation method, can not destroy end reinforced, pile foundation can be carried out repeated detection, it is high that assurance is detected as power, accuracy in detection is high.
Described connection is flexible with presstressed reinforcing steel 1, its two ends are connected with sub-connector 2 axial retention respectively, a connection forms a combination with presstressed reinforcing steel 1 and two sub-connectors 2, during use, to connect to hang over presstressed reinforcing steel 1 and detect on girder 12, hanging down the reinforcing bar on pile foundation connected from detecting girder 12 both sides in its two ends, has avoided like this workman's work high above the ground, improved the safety of workman's work.
Described connection with the structure that presstressed reinforcing steel 1 and sub-connector 2 can axial retention be connected is: described sub-connector 2 also is provided with towards an end that connects with presstressed reinforcing steel 1 locating hole 3 that a diameter can shrink, also be provided with the adjustment part 4 that can adjust these locating hole 3 diameters, connection can be dismantled stop with presstressed reinforcing steel 1 and is inserted in locating hole 3.
the structure that described adjustment part 4 can be adjusted locating hole 3 diameters is: the end of described sub-connector 2 is provided with the first voussoir 5 of an axial retention, locating hole 3 is positioned at the first voussoir 5 inboards, these the first voussoir 5 sidewalls offer at least one cracking along generatrix direction, described voussoir lateral wall is provided with screw thread, adjustment part 4 is the wedged hole of inside wall and the first voussoir 5 couplings, be provided with internal thread in this wedged hole, described adjustment part 4 is threaded with wedged hole, adjustment part 4 is by rotating along the first voussoir 5 axial feeds or withdrawing from, just realized the radial clamping of the first voussoir 5 or unclamped, because the first voussoir 5 sidewalls are provided with cracking along generatrix direction, the contraction of locating hole 3 is realized in the first voussoir 5 gap that is subject to will reducing after radial clamping power cracking, opposite adjustment part 4 withdraws from, the first voussoir 5 sidewall clamping forces reduce, cracking on the first voussoir 5 sidewalls recovers under the effect of the first voussoir 5 self material elastic force, realized the expansion of locating hole 3, this is simple in structure, easy to operate, clamping force is large, reinforcing bar effectively can be clamped, certainly except this kind structure, it can also be other structure, be two halves formula structure as locating hole 3 sidewalls, adjustment part 4 is eccentric wheel apparatus, eccentric wheel apparatus drives the contraction that locating hole 3 two halves formula sidewall move toward one another realize locating hole 3, also or sub-connector 2 sidewalls are provided with the radial hole that is communicated with locating hole 3, be provided with the radially spheroid of hole slip in radial hole, the spherical part sidewall can reach in locating hole 3, but spheroid can not fall in locating hole 3 fully, it is outside that adjustment part 4 axially can Elastic Sliding be sheathed on locating hole 3 sidewalls along sub-connector 2, adjustment part 4 inside walls are taper surface, this taper surface is tight against the surface that spheroid is exposed to sub-connector 2 outsides, as long as make so the inboard taper surface of adjustment part 4 hold out against spheroid, spheroid just to the interior motion of locating hole 3 with steel bar clamping, for increase adds the power of holding, the structures such as texture or sawtooth can also be set at spherome surface, to be all those skilled in the art be equal to replacing structure according to what the art of this patent was easy to expect to this class formation, belong to this patent protection domain.
also be provided with the second voussoir 6 of an axial retention in described sub-connector 2, this the second voussoir 6 outsides are arranged with a wedge-shaped sleeve that matches 7, also be installed with one in sub-connector 2 and tighten up platform 8, the described platform 8 that tightens up is provided with the through hole that presstressed reinforcing steel 1 for connection wears, tighten up platform 8 and be positioned at the second voussoir 6 towards a side that connects with presstressed reinforcing steel 1, also be provided with a spanner 9, the handle of described spanner 9 and spanner 9 bodies are axially arranged with angle along sub-connector 2, described spanner 9 bodies are located in wedge-shaped sleeve 7 and tighten up between platform 8, to connect when being connected with sub-connector 2 with presstressed reinforcing steel 1, first will connect with presstressed reinforcing steel 1 and insert in the second voussoir 6, then the handle on moving wrench 9, spanner 9 is in the situation that tighten up platform 8 and rotate as fulcrum like this, just heading on wedge-shaped sleeve 7 endwisely slips, and then the second voussoir 6 is tightened up connection is clamped with presstressed reinforcing steel 1, the second 6 pairs of voussoirs connection is only tightened up with presstressed reinforcing steel 1, namely need only strain and get final product, must be not stressed yet, then be used in and clamp fixing with presstressed reinforcing steel 1 by the first voussoir 5 connection, can avoid like this connecting with presstressed reinforcing steel 1 and shake when working and get loose, further guarantee to connect with the connective stability of presstressed reinforcing steel 1 with sub-connector 2.
The little end of the end relative diameter that described first and second voussoir diameter is large is towards sub-connector 2 axial inner, like this, connect when 2 generations pull to sub-connector with the reinforcing steel bar bear on presstressed reinforcing steel 1 and pile foundation, 2 of sub-connectors can be pressed from both sides tighter and tighter to them under the frictional force effect, and can not produce looseningly, guarantee the stability that connects.
Described connection with the structure that presstressed reinforcing steel 1 and sub-connector 2 can axial retention be connected is: sub-connector 2 is provided with a connecting hole towards an end that connects with presstressed reinforcing steel 1, described connection is inserted in this connecting hole with presstressed reinforcing steel 1, and it is inboard in the end wall of sub-connector 2 these ends by connector backstop to connect an end that stretches in connecting hole with presstressed reinforcing steel 1, connector can be nut, can be also Wedge gripping.
described connection use presstressed reinforcing steel 1 an only end is connected with sub-connector 2 axial retention, also be provided with one and hang blue 10, hang blue 10 and be provided with some perforation 11, described connection with presstressed reinforcing steel 1 dorsad an end of sub-connector 2 be inserted in this perforation 11, connect the end of stretching out perforation 11 with presstressed reinforcing steel 1 by connector backstop in hanging indigo plant 10 dorsad outside the sidewall of sub-connector 2, if stake top reinforcing bar is odd number row, also can adopt a sub-connector 2, set up on the top of girder 12 this moment and hang blue 10, utilize and hang indigo plant 10 and be connected with presstressed reinforcing steel 1 connection, wherein connector can be nut, it can be also Wedge gripping.
On described extension blue 10, two rows are lined up in perforation 11, and this two row is corresponding and be arranged in parallel one by one.
Also be provided with flexible steel plate 11, described flexible steel plate surface is coated with lubrication oil, connect and walk around with presstressed reinforcing steel 1 surface that flexible steel plate scribbles lubrication oil, can reduce like this friction of presstressed reinforcing steel and steel plate and steel plate and girder 12, especially in the corner of girder 12, adopt flexible steel plate to carry out transition.
Claims (10)
1. Quick connection part during a static load of pile foundation detects, it is characterized by: comprise connecting with presstressed reinforcing steel (1) and sub-connector (2), at least one end of described connection use presstressed reinforcing steel (1) can axial retention be connected with sub-connector (2), the end that sub-connector (2) connects dorsad with presstressed reinforcing steel (1) is provided with the locating hole (3) that a diameter can shrink, be provided with an adjustment part (4), this adjustment part (4) can be adjusted locating hole (3) diameter.
2. Quick connection part during static load of pile foundation according to claim 1 detects is characterized by: it is flexible connecting with presstressed reinforcing steel (1), and its two ends are connected with a sub-connector (2) axial retention respectively.
3. Quick connection part during static load of pile foundation according to claim 1 and 2 detects, it is characterized by: described connection with the structure that presstressed reinforcing steel (1) and sub-connector (2) can axial retention be connected is: described sub-connector (2) also is provided with towards an end that connects with presstressed reinforcing steel (1) locating hole (3) that a diameter can shrink, also be provided with the adjustment part (4) that can adjust this locating hole (3) diameter, connection can be dismantled stop with presstressed reinforcing steel (1) and is inserted in locating hole (3).
4. Quick connection part during according to claim 1 or 3 described static load of pile foundation detect, it is characterized by: the structure that described adjustment part (4) can be adjusted locating hole (3) diameter is: the end of described sub-connector (2) is provided with first voussoir (5) of an axial retention, locating hole (3) is positioned at the first voussoir (5) inboard, this the first voussoir (5) sidewall offers at least one cracking along generatrix direction, described voussoir lateral wall is provided with screw thread, adjustment part (4) is the wedged hole of inside wall and the first voussoir (5) coupling, be provided with internal thread in this wedged hole, described adjustment part (4) is threaded with wedged hole.
5. Quick connection part during static load of pile foundation according to claim 4 detects, it is characterized by: the second voussoir (6) that also is provided with an axial retention in described sub-connector (2), be arranged with a wedge-shaped sleeve that matches (7) outside this second voussoir (6), also be installed with one in sub-connector (2) and tighten up platform (8), the described platform (8) that tightens up is provided with the through hole that presstressed reinforcing steel (1) for connection wears, tighten up platform (8) and be positioned at the second voussoir (6) towards a side that connects with presstressed reinforcing steel (1), also be provided with a spanner (9), the handle of described spanner (9) and spanner (9) body are axially arranged with angle along sub-connector (2), described spanner (9) body is located in wedge-shaped sleeve (7) and tightens up between platform (8).
6. Quick connection part during static load of pile foundation according to claim 5 detects is characterized by: the little end of the end relative diameter that described first and second voussoir diameter is large is towards sub-connector (2) axial inner.
7. Quick connection part during static load of pile foundation according to claim 1 and 2 detects, it is characterized by: described connection with the structure that presstressed reinforcing steel (1) and sub-connector (2) can axial retention be connected is: sub-connector (2) is provided with a connecting hole towards an end that connects with presstressed reinforcing steel (1), described connection is inserted in this connecting hole with presstressed reinforcing steel (1), and it is inboard in the end wall of this end of sub-connector (2) by connector backstop to connect an end that stretches in connecting hole with presstressed reinforcing steel (1).
8. Quick connection part during static load of pile foundation according to claim 1 detects, it is characterized by: connection use presstressed reinforcing steel (a 1) only end is connected with sub-connector (2) axial retention, also be provided with one and hang blue (10), hang blue (10) and be provided with some perforation (11), described connection with presstressed reinforcing steel (1) dorsad an end of sub-connector (2) be inserted in this perforation (11), connect the end of stretching out perforation (11) with presstressed reinforcing steel (1) by connector backstop in extension indigo plant (10) dorsad outside the sidewall of sub-connector (2).
9. Quick connection part during static load of pile foundation according to claim 8 detects is characterized by: two rows are lined up in described extensions blue (10) upper perforation (11), and this two row is correspondence and being arranged in parallel one by one.
10. Quick connection part during static load of pile foundation according to claim 1 detects is characterized by: also be provided with flexible steel plate (11), described flexible steel plate surface is coated with lubrication oil, connects and walks around with presstressed reinforcing steel (1) surface that flexible steel plate scribbles lubrication oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220633472 CN202925578U (en) | 2012-11-26 | 2012-11-26 | Rapid connecting piece for use in pile foundation static load detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220633472 CN202925578U (en) | 2012-11-26 | 2012-11-26 | Rapid connecting piece for use in pile foundation static load detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202925578U true CN202925578U (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220633472 Withdrawn - After Issue CN202925578U (en) | 2012-11-26 | 2012-11-26 | Rapid connecting piece for use in pile foundation static load detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202925578U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835318A (en) * | 2012-11-26 | 2014-06-04 | 昆山市建设工程质量检测中心 | Quick connecting piece in pile foundation static load test |
| CN113882442A (en) * | 2021-11-18 | 2022-01-04 | 山东天齐建筑科技有限公司 | Device for connecting loading main beam and counter-force pile in foundation pile static load test |
-
2012
- 2012-11-26 CN CN 201220633472 patent/CN202925578U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835318A (en) * | 2012-11-26 | 2014-06-04 | 昆山市建设工程质量检测中心 | Quick connecting piece in pile foundation static load test |
| CN103835318B (en) * | 2012-11-26 | 2016-03-30 | 昆山市建设工程质量检测中心 | Quick connection part during static load of pile foundation detects |
| CN113882442A (en) * | 2021-11-18 | 2022-01-04 | 山东天齐建筑科技有限公司 | Device for connecting loading main beam and counter-force pile in foundation pile static load test |
| CN113882442B (en) * | 2021-11-18 | 2022-12-20 | 山东天齐建筑科技有限公司 | Device for connecting loading main beam and counter-force pile in foundation pile static load test |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130508 Effective date of abandoning: 20160330 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |