CN110747851A - Earth anchor for electric power construction - Google Patents
Earth anchor for electric power construction Download PDFInfo
- Publication number
- CN110747851A CN110747851A CN201911017617.3A CN201911017617A CN110747851A CN 110747851 A CN110747851 A CN 110747851A CN 201911017617 A CN201911017617 A CN 201911017617A CN 110747851 A CN110747851 A CN 110747851A
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- anchor
- hole
- fixed slot
- electric power
- power construction
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/80—Ground anchors
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a ground anchor for electric power construction, which comprises an anchor post, wherein a lifting driving mechanism is arranged at the center of the upper surface of the anchor post, a pushing mechanism is arranged in the anchor post positioned below the lifting driving mechanism, the pushing mechanism is connected with the lifting driving mechanism, and two positioning mechanisms are symmetrically arranged in the anchor post relative to the pushing mechanism. The whole operation is simple and convenient.
Description
Technical Field
The invention belongs to the technical field of electric power construction, and particularly relates to a ground anchor for electric power construction.
Background
The ground anchor is commonly used for anchoring various devices and equipment, external force borne by an object can be transmitted to a foundation through the ground anchor, the ground anchor is an important stressed structure, two types of ground anchors commonly used in the current electric power construction are mainly used, one type is that a ground anchor pit is dug firstly, the ground anchor is buried in the pit, soil is backfilled and tamped for use, the common material of the ground anchor is a round log, a steel pipe, prefabricated concrete or steel plate combined welding structure, the ground anchor needs to be dug and original state soil is damaged in use, the tensile resistance of the ground anchor is reduced, the workload is large, a large field needs to be occupied, the ground anchor is difficult to recover after use, and great manpower and financial waste is caused; the other type is a spiral anchor, also called a ground auger ground anchor, which is formed by welding a spiral plate on the top end of a steel chisel, and the ground auger is screwed into the ground when in use and is screwed out in the opposite direction when not in use, because the stress direction of the ground anchor and the anchor rod form a certain included angle when in use, the anchor rod is easy to bend, so that the aim of recycling can not be achieved, and the ground anchor for electric power construction needs to be designed.
Disclosure of Invention
The invention aims to provide a ground anchor for power construction to solve the problems, and solves the problems that one ground anchor needs to dig a pit and destroy original soil in use, the tensile resistance of the ground anchor is reduced, the workload is large, a large field needs to be occupied, the ground anchor is not easy to recover after use, and the other ground anchor is difficult to recycle because the stress direction of the other ground anchor forms a certain included angle with an anchor rod when in use, and the anchor rod is easy to bend so as not to be reused.
In order to solve the above problems, the present invention provides a technical solution:
earth anchor for electric power construction, including an anchor post, the center department of anchor post upper surface is provided with a lift actuating mechanism, is located the inside pushing mechanism that is provided with of anchor post of lift actuating mechanism below position, pushing mechanism is connected with lift actuating mechanism, the inside of anchor post is the symmetry form about pushing mechanism and is provided with two positioning mechanism, is located two positioning mechanism's below all is provided with a canceling release mechanical system, two canceling release mechanical system's inside all is provided with a spring stop gear.
Preferably, the lifting driving mechanism comprises a threaded hole, the threaded hole is formed in the center of the upper surface of the anchor post, a threaded rod is connected to the threaded hole in an inner threaded mode, the upper end of the threaded rod penetrates through an orifice of the threaded hole and extends upwards to the outside of the anchor post, and a rotating handle is fixedly connected to one end, located outside the anchor post, of the threaded rod.
Preferably, the pushing mechanism comprises a lifting cavity which is arranged in a rectangular shape, the lifting cavity is arranged inside the anchor post which is arranged below the threaded hole, the upper end cavity wall of the lifting cavity is communicated with the lower end hole opening of the threaded hole, two sliding grooves are vertically formed in two opposite cavity walls of the lifting cavity, a sliding block is connected in each sliding groove in a sliding mode, one end, opposite to each other, of each sliding block penetrates through the corresponding groove opening of each sliding groove and extends into the lifting cavity, one end, located in the lifting cavity, of each sliding block is fixedly connected with a pushing block, and the lower end of each pushing block is arranged in an isosceles triangle.
Preferably, the two positioning mechanisms respectively comprise a positioning hole, the two positioning holes are symmetrically formed in two opposite cavity walls at the lower end of the lifting cavity, a positioning plate is connected to each of the two positioning holes in a sliding mode, opposite ends of the two positioning plates penetrate through corresponding orifices of the positioning holes and extend into the lifting cavity and are arranged in an offsetting mode, the top end side wall of one side, where the two positioning plates abut against each other, of the two positioning plates is arranged in an inclined mode, and one end, far away from each of the two positioning plates, of each positioning mechanism penetrates through the corresponding orifice of the positioning hole and extends out of the anchor column.
Preferably, two the canceling release mechanical system all includes a fixed slot, two the fixed slot is seted up respectively on the lower extreme pore wall of two locating holes, corresponds two the equal fixedly connected with fixed block of locating plate lower surface of fixed slot position, two the lower extreme of fixed block all runs through the notch that corresponds the fixed slot and extends to in the fixed slot, two the fixed block is located equal fixedly connected with spring on the lateral wall of one side of fixed slot, two the one end difference fixed connection that the fixed block was kept away from to the spring is on the corresponding cell wall of fixed slot.
Preferably, the two spring limiting mechanisms respectively comprise a through hole, the through holes respectively penetrate through two ends of the fixed blocks located in the fixed grooves, each through hole is internally provided with a fixed rod in a sliding connection mode, two ends of each fixed rod respectively penetrate through two end hole openings corresponding to the through holes and extend into the fixed grooves, two ends of each fixed rod located in the fixed grooves are respectively fixedly connected to two opposite groove walls of the fixed grooves, and the rod walls of the fixed rods corresponding to the two spring positions are respectively sleeved in the two springs.
Preferably, the upper surface of the anchor post is fixedly connected with a fixed pull ring, and the lower end of the anchor post is fixedly connected with an anchor head.
Preferably, the lower end of the threaded rod penetrates through the lower end hole of the threaded hole and extends into the lifting cavity, and the lower end rod wall of the threaded rod in the lifting cavity is rotatably connected to the center of the upper surface of the pushing block through a bearing.
The invention has the beneficial effects that:
1. the invention relates to a ground anchor for electric power construction, which is provided with a threaded hole, a threaded rod, a rotating handle, a lifting cavity, a sliding chute, a sliding block, a pushing block, a positioning hole, a positioning plate, a fixing groove and a fixing block.
2. The invention relates to a ground anchor for electric power construction, which is provided with a threaded hole, a threaded rod, a rotating handle, a lifting cavity, a sliding chute, a sliding block, a pushing block, a positioning hole, a positioning plate, a fixing groove, a fixing block, a spring, a through hole and a fixing rod.
Description of the drawings:
for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a partial sectional view of the invention in a bottom view;
FIG. 3 is a partial top structural cross-sectional view of the present invention;
FIG. 4 is a schematic structural view of a partial non-operating state of the present invention;
FIG. 5 is a schematic view of a partial operating state structure of the present invention;
fig. 6 is an enlarged schematic view of a portion a of fig. 1 according to the present invention.
In the figure: 1. an anchor post; 2. a lifting drive mechanism; 21. a threaded hole; 22. a threaded rod; 23. rotating the handle; 3. a pushing mechanism; 31. a lifting cavity; 32. a chute; 33. a slider; 34. a pushing block; 4. a positioning mechanism; 41. positioning holes; 42. positioning a plate; 5. a reset mechanism; 51. fixing grooves; 52. a fixed block; 53. a spring; 6. a spring limiting mechanism; 61. a through hole; 62. fixing the rod; 7. fixing a pull ring; 8. an anchor head.
The specific implementation mode is as follows:
as shown in fig. 1 to 6, the following technical solutions are adopted in the present embodiment:
an earth anchor for electric power construction comprises an anchor post 1, a lifting driving mechanism 2 is arranged at the center of the upper surface of the anchor post 1, a pushing mechanism 3 is arranged inside the anchor post 1 which is positioned below the lifting driving mechanism 2, the pushing mechanism 3 is connected with the lifting driving mechanism 2, two positioning mechanisms 4 are symmetrically arranged inside the anchor post 1 relative to the pushing mechanism 3, a reset mechanism 5 is arranged below the two positioning mechanisms 4, a spring limiting mechanism 6 is arranged inside the two reset mechanisms 5, the anchor post 1 is firstly inserted into the ground, the pushing mechanism 3 is driven to descend by the lifting driving mechanism 2, the positioning mechanisms 4 are pushed into the ground outside the anchor post 1 to improve the tensile resistance of the earth anchor, and when the earth anchor needs to be taken out, the pushing mechanism 3 is lifted by the lifting driving mechanism 2 to release the extrusion on the positioning mechanisms 4, the positioning mechanism 4 can be reset under the action of the resetting mechanism 5, the ground anchor can be conveniently recovered, and the whole operation is simple and convenient.
Wherein, lift actuating mechanism 2 includes a screw hole 21, screw hole 21 sets up the center department at 1 upper surface of post, screw hole 21 internal thread is connected with a threaded rod 22, the drill way that screw hole 21 was run through to the upper end of threaded rod 22 upwards extends to outside post 1, threaded rod 22 is located post 1 outer one end fixedly connected with one and rotates handle 23, insert at post 1 and establish behind the completion rethread rotation handle 23 and drive threaded rod 22 and carry out corotation, through the threaded connection relation of threaded rod 22 with screw hole 21, threaded rod 22 carries out the rotary type and descends.
Wherein, pushing mechanism 3 includes a lift chamber 31 that is the rectangle setting, lift chamber 31 sets up inside 1 anchor posts that are located screw hole 21 below position, the upper end chamber wall of lift chamber 31 is linked together with the lower extreme drill way of screw hole 21, it has two spouts 32 to be vertical form on the double-phase relative chamber wall of lift chamber 31, equal sliding connection has a slider 33 in two spouts 32, two sliders 33 one end in opposite directions all run through the notch that corresponds spout 32 and extend to in the lift chamber 31, two sliders 33 are located the common fixedly connected with one of one end in lift chamber 31 and promote piece 34, the lower extreme that promotes piece 34 is the setting of isosceles triangle piece, under slider 33 and spout 32 spacing, it can only carry out vertical lift to promote piece 34, make threaded rod 22 can drive and promote piece 34 and carry out vertical lift.
Wherein, two positioning mechanism 4 all include a locating hole 41, two locating holes 41 are the symmetry form and offer on the two-phase opposite chamber wall of lift chamber 31 lower extreme, equal sliding connection has a locating plate 42 in two locating holes 41, two locating plate 42 one end in opposite directions all run through the corresponding drill way of locating hole 41 and extend to in the lift chamber 31 and be the setting of offseting form, all be the slope form setting on the top lateral wall of two locating plate 42 offseting one side, the one end that two locating plate 42 kept away from mutually all runs through the corresponding drill way of locating hole 41 and extends to outside the anchor post 1, its lower extreme at first offsets with the slope mouth that two locating plate 42 offseted department respectively when pushing block 34 descends, and promote locating plate 42 to both ends through the angle of slope, make the one end that two locating plate 42 kept away from mutually all extend to in the outer soil of anchor post 1, and then improved the stretching resistance of earth anchor.
Wherein, two canceling release mechanical system 5 all include a fixed slot 51, two fixed slots 51 are seted up respectively on the lower extreme pore wall of two locating holes 41, the equal fixedly connected with fixed block 52 of locating plate 42 lower surface that corresponds two fixed slot 51 positions, the lower extreme of two fixed blocks 52 all runs through the notch that corresponds fixed slot 51 and extends to in the fixed slot 51, two fixed blocks 52 are located equal fixedly connected with spring 53 on the lateral wall of one side in the fixed slot 51, the one end that fixed block 52 was kept away from to two spring 53 is fixed connection respectively on the corresponding cell wall of fixed slot 51, fixed block 52 resets under spring 53's elastic force effect, fixed block 52 drives locating plate 42 and gets back to in locating hole 41 when the fixed slot 51 removes, and then has released the location to the earth anchor, can take out the earth anchor.
Wherein, two spring stop gear 6 all include a through-hole 61, two through-holes 61 run through respectively and set up the one end that is located fixed slot 51 at two fixed blocks 52, equal sliding connection has a dead lever 62 in two through-holes 61, the both ends of two dead levers 62 run through the both ends drill way that corresponds through-hole 61 respectively and extend to in the fixed slot 51, two dead levers 62 are located the both ends difference fixed connection in fixed slot 51 on the double-phase to the cell wall of fixed slot 51, the pole wall that two dead levers 62 correspond two springs 53 positions is established respectively in two springs 53, spacing spring 53 carries out, avoid spring 53 to produce the slope and then cause spring 53's damage, it is spacing to carry out fixed block 53 simultaneously, the steady slip of fixed block 52 with locating plate 42 has been guaranteed.
Wherein, the upper surface of the anchor post 1 is fixedly connected with a fixed pull ring 7, and the lower end of the anchor post 1 is fixedly connected with an anchor head 8.
Wherein, the lower end of the threaded rod 22 penetrates through the lower end opening of the threaded hole 21 and extends into the lifting cavity 31, and the lower end rod wall of the threaded rod 22 in the lifting cavity 31 is rotatably connected to the center of the upper surface of the pushing block 34 through a bearing.
The using state of the invention is as follows: the invention relates to a ground anchor for electric power construction, when in use, firstly, an anchor post 1 and an anchor head 8 are vertically inserted in the ground, after the insertion is finished, a rotating handle 23 drives a threaded rod 22 to rotate forwards, the threaded rod 22 descends in a rotating mode through the threaded connection relationship between the threaded rod 22 and a threaded hole 21, meanwhile, as the threaded rod 22 and a pushing block 34 are connected in a rotating mode through a bearing, and under the limit of a sliding block 33 and a sliding groove 32, the pushing block 34 can only vertically ascend and descend, the threaded rod 22 drives the lower end of the pushing block 34 to firstly abut against an inclined opening at the abutting part of two positioning plates 42 respectively, and pushes the positioning plates 42 to two ends through inclined angles, so that the far ends of the two positioning plates 42 extend into the ground outside the anchor post 1, the lifting of the positioning plates 42 drives a fixing block 52 to synchronously move in a fixing groove 51 to limit the positioning plates 42, the positioning plate 42 is prevented from being separated from the anchor column 1, so that the tensile resistance of the ground anchor is improved, and the undisturbed soil is not damaged while the workload is small; when the ground anchor needs to be taken out, the handle 23 is rotated to drive the threaded rod 22 to rotate reversely, so that the threaded rod 22 drives the pushing block 34 to ascend to the top end of the lifting cavity 31 to release the extrusion on the positioning plate 42, the fixing block 52 resets under the elastic action of the spring 53 at the moment, the fixing block 52 drives the positioning plate 42 to return to the positioning hole 41 while moving in the fixing groove 51, the positioning on the ground anchor is released, the ground anchor can be taken out, the whole operation is simple and convenient, and the ground anchor can be used for multiple times.
While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (8)
1. Anchor for electric power construction, its characterized in that includes an anchor post (1), the center department of anchor post (1) upper surface is provided with a lift actuating mechanism (2), is located anchor post (1) inside of lift actuating mechanism (2) below position is provided with a pushing mechanism (3), pushing mechanism (3) are connected with lift actuating mechanism (2), the inside of anchor post (1) is the symmetry form about pushing mechanism (3) and is provided with two positioning mechanism (4), is located two the below of positioning mechanism (4) all is provided with a canceling release mechanical system (5), two the inside of canceling release mechanical system (5) all is provided with a spring stop gear (6).
2. The earth anchor for electric power construction according to claim 1, wherein: lifting drive mechanism (2) include a screw hole (21), screw hole (21) are seted up in the center department of anchor post (1) upper surface, screw hole (21) internal thread connection has a threaded rod (22), the upper end of threaded rod (22) runs through the drill way of screw hole (21) and upwards extends to outside anchor post (1), threaded rod (22) are located one rotation handle (23) of the outer one end fixedly connected with of anchor post (1).
3. The earth anchor for electric power construction according to claim 2, wherein: pushing mechanism (3) are including one lift chamber (31) that is the rectangle setting, set up in anchor post (1) that is located screw hole (21) below position lift chamber (31) inside, the upper end chamber wall in lift chamber (31) is linked together with the lower extreme drill way of screw hole (21), it has offered two spout (32), two to be vertical form on the double-phase chamber wall in lift chamber (31) equal sliding connection has a slider (33), two in spout (32) the notch that corresponds spout (32) is all run through to slider (33) one end in opposite directions and extend to lift chamber (31), two the common fixedly connected with piece of one end that slider (33) are located lift chamber (31) promotes piece (34), the lower extreme that promotes piece (34) is the setting of isosceles triangle piece.
4. The earth anchor for electric power construction according to claim 3, wherein: two positioning mechanism (4) all include a locating hole (41), two locating hole (41) are the symmetry form and offer on the double-phase opposite chamber wall of lift chamber (31) lower extreme, two equal sliding connection has a locating plate (42) in locating hole (41), two locating plate (42) one end in opposite directions all runs through the corresponding drill way of locating hole (41) and extends to in lift chamber (31) and be the setting of offseting form, two all be the slope form setting on the top lateral wall on one side is offseted in locating plate (42), two the one end that locating plate (42) kept away from mutually all runs through the corresponding drill way of locating hole (41) and extends outside anchor post (1).
5. The earth anchor for electric power construction according to claim 4, wherein: two canceling release mechanical system (5) all include a fixed slot (51), two fixed slot (51) are seted up respectively on the lower extreme pore wall of two locating holes (41), correspond two the equal fixedly connected with fixed block (52) of locating plate (42) lower surface of fixed slot (51) position, two the lower extreme of fixed block (52) all runs through the notch that corresponds fixed slot (51) and extends to in fixed slot (51), two fixed block (52) are located equal fixedly connected with spring (53) on one side lateral wall in fixed slot (51), two the one end difference fixed connection that fixed block (52) were kept away from in spring (53) is on the corresponding cell wall of fixed slot (51).
6. The earth anchor for electric power construction according to claim 5, wherein: two spring stop gear (6) all include a through-hole (61), two through-hole (61) run through respectively set up two fixed block (52) are located the one end in fixed slot (51), two equal sliding connection has a dead lever (62) in through-hole (61), two the both ends of dead lever (62) run through the both ends drill way that corresponds through-hole (61) respectively and extend to in fixed slot (51), two both ends that dead lever (62) are located fixed slot (51) are fixed connection respectively on the double-phase relative cell wall of fixed slot (51), two the pole wall that dead lever (62) correspond two springs (53) positions is established respectively in two springs (53).
7. The earth anchor for electric power construction according to claim 1, wherein: the upper surface of the anchor column (1) is fixedly connected with a fixed pull ring (7), and the lower end of the anchor column (1) is fixedly connected with an anchor head (8).
8. The earth anchor for electric power construction according to claim 3, wherein: the lower end of the threaded rod (22) penetrates through a lower end hole of the threaded hole (21) and extends into the lifting cavity (31), and the lower end rod wall of the threaded rod (22) in the lifting cavity (31) is rotatably connected to the center of the upper surface of the pushing block (34) through a bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911017617.3A CN110747851A (en) | 2019-10-24 | 2019-10-24 | Earth anchor for electric power construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911017617.3A CN110747851A (en) | 2019-10-24 | 2019-10-24 | Earth anchor for electric power construction |
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| Publication Number | Publication Date |
|---|---|
| CN110747851A true CN110747851A (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911017617.3A Pending CN110747851A (en) | 2019-10-24 | 2019-10-24 | Earth anchor for electric power construction |
Country Status (1)
| Country | Link |
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| CN (1) | CN110747851A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111648638A (en) * | 2020-06-11 | 2020-09-11 | 广东恒业水泥制品有限公司 | Novel concrete electric wire pole convenient to adjust electric wire tensioning degree |
| CN112647755A (en) * | 2021-01-05 | 2021-04-13 | 中冶建工集团有限公司 | Ground supporting box |
| CN112982666A (en) * | 2021-03-18 | 2021-06-18 | 叶远庚 | Steel construction earthquake-resistant structure for construction |
| CN113585488A (en) * | 2021-07-28 | 2021-11-02 | 上海绿地建设(集团)有限公司 | Assembled building supporting seat |
| CN114318962A (en) * | 2021-12-23 | 2022-04-12 | 山东鲁道建设工程有限公司 | Railway turnout area line reinforcing construction method |
| CN114482697A (en) * | 2021-12-25 | 2022-05-13 | 客来福家居股份有限公司 | Split handle, door body applying split handle and split handle installation process |
| CN115467326A (en) * | 2022-08-26 | 2022-12-13 | 天津送变电工程有限公司 | Extruding-expanding drill type ground anchor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106480883A (en) * | 2016-12-09 | 2017-03-08 | 重庆工商职业学院 | New earth anchor |
| CN208219644U (en) * | 2018-03-11 | 2018-12-11 | 肖礼全 | A kind of oil exploitation is with beating ground pile |
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2019
- 2019-10-24 CN CN201911017617.3A patent/CN110747851A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106480883A (en) * | 2016-12-09 | 2017-03-08 | 重庆工商职业学院 | New earth anchor |
| CN208219644U (en) * | 2018-03-11 | 2018-12-11 | 肖礼全 | A kind of oil exploitation is with beating ground pile |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111648638A (en) * | 2020-06-11 | 2020-09-11 | 广东恒业水泥制品有限公司 | Novel concrete electric wire pole convenient to adjust electric wire tensioning degree |
| CN112647755A (en) * | 2021-01-05 | 2021-04-13 | 中冶建工集团有限公司 | Ground supporting box |
| CN112982666A (en) * | 2021-03-18 | 2021-06-18 | 叶远庚 | Steel construction earthquake-resistant structure for construction |
| CN113585488A (en) * | 2021-07-28 | 2021-11-02 | 上海绿地建设(集团)有限公司 | Assembled building supporting seat |
| CN114318962A (en) * | 2021-12-23 | 2022-04-12 | 山东鲁道建设工程有限公司 | Railway turnout area line reinforcing construction method |
| CN114482697A (en) * | 2021-12-25 | 2022-05-13 | 客来福家居股份有限公司 | Split handle, door body applying split handle and split handle installation process |
| CN115467326A (en) * | 2022-08-26 | 2022-12-13 | 天津送变电工程有限公司 | Extruding-expanding drill type ground anchor |
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Application publication date: 20200204 |
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