CN114351750A - Bridge pile foundation structure suitable for rock mass abrupt slope - Google Patents
Bridge pile foundation structure suitable for rock mass abrupt slope Download PDFInfo
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- CN114351750A CN114351750A CN202210169166.0A CN202210169166A CN114351750A CN 114351750 A CN114351750 A CN 114351750A CN 202210169166 A CN202210169166 A CN 202210169166A CN 114351750 A CN114351750 A CN 114351750A
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Abstract
The invention relates to the technical field of building engineering, and particularly provides a bridge pile foundation structure suitable for a rocky steep slope, which comprises a plurality of pile foundation units, wherein each pile foundation unit comprises a fixed foundation, a first supporting pile and a second supporting pile, the fixed foundation is arranged on the rocky steep slope, the first supporting piles are sequentially stacked on the fixed foundation, the second supporting piles are arranged on the uppermost first supporting piles, and a bridge is arranged above the second supporting piles of the pile foundation units; the upper and lower both ends of first support pile and second support pile all are equipped with the fixed disk, are equipped with a plurality of pre-buried bolts on fixed basis, and the pre-buried bolt upper end is connected with the nut after passing the fixed disk of the first support pile of lower extreme, and the fixed disk that adjacent first support pile is close to each other passes through the bolt and is connected with the nut. The number of the first supporting piles can be flexibly selected, and the adjustment is convenient; the nuts at different module connecting positions can be limited, so that loosening is prevented, and the strength of a bridge pile foundation is increased; the disassembly is convenient.
Description
Technical Field
The invention relates to the technical field of constructional engineering, and particularly provides a bridge pile foundation structure suitable for a rocky abrupt slope.
Background
The bridge is the indispensable partly of people daily life now, and it can be connected the place that has the separation, and the bridge is built in many places, has wherein to establish the bridge in rock matter abrupt slope department, and the rock matter abrupt slope is big, and the prefabricated post of complete length is not good to be carried, increases the degree of difficulty of construction, and cast-in-place time is too of a specified duration again, can influence the progress of construction like this.
Disclosure of Invention
In order to solve the technical problem, the invention provides a bridge pile foundation structure suitable for a rocky abrupt slope
The invention is realized in this way, a bridge pile foundation structure suitable for rocky steep slopes comprises a plurality of pile foundation units, each pile foundation unit comprises a fixed foundation, a plurality of first supporting piles and a second supporting pile, the fixed foundation is arranged on the rocky steep slope, the first supporting piles are sequentially stacked on the fixed foundation, the second supporting piles are arranged on the uppermost first supporting piles, and a bridge is arranged above the second supporting piles of the pile foundation units;
the upper and lower both ends of first support pile and second support pile all are equipped with the fixed disk, are equipped with a plurality of pre-buried bolts on fixed basis, and the pre-buried bolt upper end is connected with the nut after passing the fixed disk of the first support pile of lower extreme, and the fixed disk that adjacent first support pile is close to each other passes through the bolt and is connected with the nut.
Preferably, a first rotating rod is rotatably arranged inside each first supporting pile, a second rotating rod is rotatably arranged inside each second supporting pile, a third rotating rod is rotatably arranged inside each fixed foundation, the upper end and the lower end of each first rotating rod and the upper end and the lower end of each second rotating rod are respectively provided with a rotating wheel, the lower end head of each first rotating rod and the lower end head of each second rotating rod are respectively connected with a clamping head, the upper end head of each first rotating rod and the upper end head of each third rotating rod are respectively connected with a plug, the upper end of each plug is clamped and matched with a clamping groove of the corresponding clamping head, and the lower end of each third rotating rod is connected with a driving assembly;
a plurality of inverted U-shaped first sliding frames are arranged on the outer side of the lower end of the first supporting pile and the outer side of the lower end of the second supporting pile, a plurality of U-shaped second sliding frames are arranged on the outer side of the upper end of the second supporting pile, sliding holes are formed in the inner portions, close to one side of the first supporting pile and one side of the second supporting pile, of the first sliding frames, sliding holes are formed in the inner portions, close to one side of the second supporting pile and one side of the second supporting pile, of the second sliding frames, sliding blocks are connected to the inner portions, close to the first supporting pile and one side of the second supporting pile, of the first sliding frames, second springs are arranged in the sliding holes, first springs are arranged in the accommodating holes, clamping blocks are connected to one sides, close to the first supporting pile and the second supporting pile, of the first springs, and clamping holes are formed in positions, corresponding to the accommodating holes, of the fixed disc; a plurality of first pull ropes are wound on each rotating wheel, the other ends of the first pull ropes penetrate through the fixed disc, the first sliding frame, the second sliding frame and the second spring at corresponding positions to be connected to the sliding block, one end of each second pull rope is also connected with the sliding block, and the other end of each second pull rope penetrates through the first sliding frame, the second sliding frame and the first spring at corresponding positions to be connected with the clamping block; grooves matched with the nuts in shape are formed in the first sliding frame and the second sliding frame, and the elastic force of the second spring is larger than that of the first spring.
Further preferably, drive assembly includes fourth bull stick, fifth bull stick and carousel, and the fourth bull stick level sets up inside fixed basis, the vertical setting of fifth bull stick is inside fixed basis, the lower extreme of third bull stick and the one end of fourth bull stick, the other end of fourth bull stick all are connected through gear engagement with the lower extreme of fifth bull stick, and the upper end of fifth bull stick is worn out fixed basis upper surface and is connected with the carousel, is equipped with the handle on the carousel.
Preferably, the inside swing joint of carousel has L shape pole, the last end of L shape pole with the top of handle all is fixed with the ring, the jack has been seted up at the top of fixed basis, the bottom of L shape pole is located the inside of jack.
Preferably, a support plate is fixed on the outer side wall of the second support pile and the outer side wall of the first support pile, and a third spring is fixedly connected between the support plate and the sliding frame.
Preferably, the upper end of the first rotating rod and the upper end of the third rotating rod are connected with the plug in a vertical sliding mode, the upper ends of the first rotating rod and the third rotating rod are both connected with fourth springs, and the other ends of the fourth springs are fixedly connected with the plug.
Preferably, the first sliding frame and the second sliding frame are both provided with clamping cylinders, one sides of the clamping cylinders corresponding to the nuts are provided with bayonets, and the bayonets are matched with the nuts in shape.
Further preferably, the bottom of the fixed disk, which is in contact with the bolt, is provided with a limit groove, and the limit groove is matched with the shape of the lower end of the bolt.
Preferably, one side of the fixture block, which is far away from the first spring, is an inclined surface.
Further preferably, the first support pile and the second support pile each comprise an inner support column and a reinforcing layer outside the support column.
Compared with the prior art, the invention has the advantages that:
1. firstly, the number of the first supporting piles can be flexibly selected according to the gradient of the rock steep slope, and the adjustment is convenient;
2. the nuts at different module connecting positions can be limited, so that loosening is prevented, and the strength of a bridge pile foundation is increased; 3. the disassembly is convenient.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a first support pile according to the present invention;
FIG. 3 is an enlarged schematic view of the invention at A in FIG. 1;
FIG. 4 is an enlarged view of the structure of FIG. 1 at B;
FIG. 5 is an enlarged view of the structure of FIG. 4 at C;
FIG. 6 is an enlarged view of FIG. 4 at D according to the present invention;
fig. 7 is a schematic view of the internal structure of a second support pile according to the present invention;
FIG. 8 is a schematic view of the cartridge of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 8, the present invention provides a bridge pile foundation structure suitable for a rocky steep slope, including a plurality of pile foundation units, each pile foundation unit including a fixed foundation 4, a plurality of first support piles 3 and a second support pile 35, the fixed foundation 4 being disposed on the rocky steep slope, the first support piles 3 being sequentially stacked on the fixed foundation 4, the second support piles 35 being disposed on the uppermost first support pile 3, the bridge 1 being disposed above the second support piles 35 of the plurality of pile foundation units;
the upper and lower both ends of first support pile 3 and second support pile 35 all are equipped with fixed disk 9, are equipped with a plurality of buried bolts 24 in advance on fixed foundation 4, and buried bolt 24 upper end is connected with nut 10 after passing the fixed disk 9 of the first support pile 3 of lower extreme, and the fixed disk 9 that adjacent first support pile 3 is close to each other passes through bolt 18 and nut 10 and connects.
When the bridge is erected on the rocky steep slope by using the method, the number and the distribution of the required pile foundation units are set according to the scale of the bridge, then the fixed foundation 4 is poured at the distribution position of each pile foundation unit, then the plurality of first supporting piles 3 are sequentially stacked on the fixed foundation 4, finally the second supporting piles 35 are stacked on the uppermost first supporting pile 3, the bridge 1 is arranged on the second supporting piles 35, and the fixed foundation 4, the first supporting piles 3 and the second supporting piles 35 are sequentially and fixedly connected, so that the erection of the bridge is completed. The invention can flexibly select the number of the first supporting piles 3 according to different slopes.
As the bridge is exposed outdoors for a long time, the nut 10 for fixing is easy to loosen, and the safety of the bridge is affected, as an improvement of the technical scheme, the invention is provided with a fixing and limiting structure of the nut, specifically, a first rotating rod 23 is rotatably arranged inside each first supporting pile 3, a second rotating rod 39 is rotatably arranged inside each second supporting pile 35, a third rotating rod 26 is rotatably arranged inside each fixed foundation 4, the upper end and the lower end of the first rotating rod 23 and the upper end and the lower end of the second rotating rod 39 are respectively provided with a rotating wheel 32, the lower end of the first rotating rod 23 and the lower end of the second rotating rod 39 are respectively connected with a clamping head 31, the upper end of the first rotating rod 23 and the upper end of the third rotating rod 26 are respectively connected with a plug 8, the upper end of the plug 8 is clamped and matched with a clamping groove of the clamping head 31 at a corresponding position, and the lower end of the third rotating rod 26 is connected with a driving component;
a plurality of inverted U-shaped first sliding frames 6 are arranged on the outer side of the lower end of the first supporting pile 3 and the outer side of the lower end of the second supporting pile 35, a plurality of U-shaped second sliding frames 41 are arranged on the outer side of the upper end of the second support pile 35, sliding holes 22 are formed in the inner portion, close to the first support pile 3 and the second support pile 35, of the first sliding frame 6 and the inner portion, close to the second support pile 35, of the second sliding frame 41, a sliding block 21 is connected in each sliding hole 22 in a sliding mode, a second spring 20 is arranged at the lower end of each sliding block 21, accommodating holes 14 are formed in the inner portions, far away from the first support pile 3 and the second support pile 35, of the first sliding frame 6 and the second sliding frame 41, first springs 12 are arranged in the accommodating holes 14, clamping blocks 13 are connected to the sides, close to the first support pile 3 and the second support pile 35, of the first springs 12, and clamping holes 15 are formed in the fixed disc 9 and in positions corresponding to the accommodating holes 14; a plurality of first pull ropes 19 are wound on each rotating wheel 32, the other ends of the first pull ropes 19 penetrate through the fixed disc 9, the first sliding frame 6, the second sliding frame 41 and the second spring 20 at corresponding positions and are connected to the sliding block 21, one end of each second pull rope 11 is also connected with the sliding block 21, and the other end of each second pull rope penetrates through the first sliding frame 6, the second sliding frame 41 and the first spring 12 at corresponding positions and is connected with the fixture block 13; the first sliding frame 6 and the second sliding frame 41 are internally provided with grooves matched with the shape of the nut 10, and the elastic force of the second spring 20 is larger than that of the first spring 12.
After the first support pile 3 and the second support pile 35 are installed, the third rotating rod 26 is rotated through the driving assembly, the third rotating rod 26 drives the plug 8 to rotate, the plug 8 is clamped in the chuck 31, the plug 31, the plurality of first rotating rods 23 and the second rotating rods 23 rotate along with the plug, so as to drive the rotating wheels 32 at all positions to rotate, the rotating wheels 32 strain the first pulling ropes 19, the sliding blocks 21 compress the second springs 20 and slide downwards, so as to release the second pulling ropes 11, under the pushing action of the first springs 12, the clamping blocks 13 move towards the clamping holes 15, when the second springs 20 are not compressed downwards any more and the rotating rods continue to rotate, the first pulling ropes 19 pull the first sliding frame 6 downwards and the second sliding frame 41 upwards, the nuts 10 at all positions are sleeved in the sliding frame, the nuts 10 are limited, and the vertical sizes of the accommodating holes 14 can ensure that the first springs 12 cannot be squeezed between the sliding frame 6 and the fixed disc 9 when the sliding frames slide upwards, damaging the first spring 12.
As a driving assembly's an implementation, driving assembly includes fourth bull stick 28, fifth bull stick 33 and carousel 37, and fourth bull stick 28 level sets up inside fixed basis 4, the vertical setting of fifth bull stick 33 is inside fixed basis 4, the lower extreme of third bull stick 26 and the one end of fourth bull stick 28, the other end of fourth bull stick 28 and the lower extreme of fifth bull stick 33 all pass through gear 27 meshing connection, and the upper end of fifth bull stick 33 is worn out fixed basis 4 upper surface and is connected with carousel 37, is equipped with handle 38 on carousel 37.
When the handle 38 is driven, the driven rotary disc 37 rotates, the rotary disc 37 drives the fifth rotary rod 33 to rotate, and the fifth rotary rod 33, the fourth rotary rod 28 and the third rotary rod 26 are sequentially driven by the gear 27 to realize driving.
In order to fix the position of the driving assembly after the driving assembly is in place, as an improvement, an L-shaped rod 34 is movably connected inside the rotary disc 37, the upper end of the L-shaped rod 34 and the top of the handle 38 are both fixed with a circular ring 25, the top of the fixed base 4 is provided with a jack 36, and the bottom of the L-shaped rod 34 is located inside the jack 36.
After the position is adjusted, the L-shaped rod 34 is inserted into the hole of the rotary disc 37 and then inserted into the insertion hole 36 of the fixed base 4, and then the bolt passes through the handle 38 and the ring 25 on the L-shaped rod 34, so that the position is fixed.
In order to facilitate disassembly, as an improvement, a support plate 7 is fixed on both the outer side wall of the second support pile 35 and the outer side wall of the first support pile 3, and a third spring 5 is fixedly connected between the support plate 7 and the sliding frame 6.
During disassembly, the third rotating rod 26 is rotated in the opposite direction by the driving assembly, and the latch 13 comes out of the latch hole 15 through a series of transmissions, and the sliding frame 6 is separated from the nut 10 under the pulling action of the third spring 5.
The upper end of the first rotating rod 23 and the upper end of the third rotating rod 26 are connected with the plug 8 in a vertical sliding mode, the upper end of the first rotating rod 23 and the upper end of the third rotating rod 26 are both connected with a fourth spring 30, and the other end of the fourth spring 30 is fixedly connected with the plug 8. In this way, the plug 8 can be moved, and the plug 8 cannot be crushed when not accurately inserted into the chuck 31 during splicing.
In order to further match the nut 10, as an improvement, a clamping cylinder 17 is arranged inside the first sliding frame 6 and the second sliding frame 41, a bayonet 2 is arranged on one side of the clamping cylinder 17 corresponding to the nut 10, and the bayonet 2 is matched with the nut 10 in shape.
In order to limit the lower end of the bolt 18, as an improvement of the technical scheme, the bottom of the fixed plate 9, which is in contact with the bolt 18, is provided with a limiting groove 16, and the limiting groove 16 is matched with the shape of the lower end of the bolt.
When the sliding frame slides upwards or downwards, in order to facilitate sliding, one side of the fixture block 13 away from the first spring 12 is an inclined surface. The inclined surface on the first sliding frame and the inclined surface on the second sliding frame are opposite in direction.
Preferably, each of the first 3 and second 35 support piles includes an inner support column 29 and a reinforcing layer 40 outside support column 29.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The bridge pile foundation structure is characterized by comprising a plurality of pile foundation units, wherein each pile foundation unit comprises a fixed foundation (4), a plurality of first supporting piles (3) and a second supporting pile (35), the fixed foundation (4) is arranged on the rocky steep slope, the first supporting piles (3) are sequentially stacked on the fixed foundation (4), the second supporting piles (35) are arranged on the uppermost first supporting piles (3), and the bridge (1) is arranged above the second supporting piles (35) of the pile foundation units;
the upper and lower both ends of first support pile (3) and second support pile (35) all are equipped with fixed disk (9), are equipped with a plurality of buried bolt in advance (24) on fixed foundation (4), and buried bolt in advance (24) upper end is passed and is connected with nut (10) behind fixed disk (9) of first support pile (3) of lower extreme, and adjacent first support pile (3) are close to fixed disk (9) of each other and are passed through bolt (18) and nut (10) and be connected.
2. The bridge pile foundation structure suitable for the rocky steep slope according to claim 1, a first rotating rod (23) is rotatably arranged in each first supporting pile (3), a second rotating rod (39) is rotatably arranged in each second supporting pile (35), a third rotating rod (26) is rotatably arranged in each fixed foundation (4), rotating wheels (32) are respectively arranged at the upper end and the lower end of the first rotating rod (23) and the upper end and the lower end of the second rotating rod (39), the lower end of the first rotating rod (23) and the lower end of the second rotating rod (39) are respectively connected with a clamping head (31), the upper end of the first rotating rod (23) and the upper end of the third rotating rod (26) are respectively connected with a plug (8), the upper end of the plug (8) is clamped and matched with a clamping groove of the clamping head (31) at a corresponding position, and the lower end of the third rotating rod (26) is connected with a driving assembly;
the lower end of the first support pile (3) is provided with a plurality of inverted U-shaped first sliding frames (6) on the outer side of the lower end of the second support pile (35), the upper end of the second support pile (35) is provided with a plurality of U-shaped second sliding frames (41), the first sliding frames (6) are close to the inner parts of one sides of the first support pile (3) and the second support pile (35), the inner parts of one sides of the second sliding frames (41) close to the second support pile (35) are provided with sliding holes (22), each sliding hole (22) is internally provided with a sliding block (21) in a sliding connection mode, the lower end of each sliding block (21) is provided with a second spring (20), the first sliding frames (6), the inner parts of the second sliding frames (41) are far away from the first support pile (3), one side of the second support pile (35) is provided with accommodating holes (14), first springs (12) are arranged in the accommodating holes (14), and the first springs (12) are close to the first support pile (3), One side of the second support pile (35) is connected with a clamping block (13), and a clamping hole (15) is formed in the position, corresponding to the accommodating hole (14), on the fixed disc (9); a plurality of first pull ropes (19) are wound on each rotating wheel (32), the other ends of the first pull ropes (19) penetrate through a fixed disc (9), a first sliding frame (6), a second sliding frame (41) and a second spring (20) at corresponding positions and are connected to a sliding block (21), one end of each second pull rope (11) is also connected with the sliding block (21), and the other end of each second pull rope penetrates through the first sliding frame (6), the second sliding frame (41) and the first spring (12) at corresponding positions and is connected with a clamping block (13); grooves matched with the shape of the nut (10) are formed in the first sliding frame (6) and the second sliding frame (41), and the elastic force of the second spring (20) is larger than that of the first spring (12).
3. The bridge pile foundation structure suitable for the rock steep slope of claim 2, wherein the driving assembly comprises a fourth rotating rod (28), a fifth rotating rod (33) and a rotary table (37), the fourth rotating rod (28) is horizontally arranged inside the fixed foundation (4), the fifth rotating rod (33) is vertically arranged inside the fixed foundation (4), the lower end of the third rotating rod (26) is meshed with one end of the fourth rotating rod (28), the other end of the fourth rotating rod (28) is meshed with the lower end of the fifth rotating rod (33) through a gear (27), the upper end of the fifth rotating rod (33) penetrates through the upper surface of the fixed foundation (4) to be connected with the rotary table (37), and a handle (38) is arranged on the rotary table (37).
4. The bridge pile foundation structure suitable for the rock steep slope according to claim 3, wherein an L-shaped rod (34) is movably connected to the inside of the rotary table (37), a circular ring (25) is fixed to the upper end of the L-shaped rod (34) and the top of the handle (38), a jack (36) is formed in the top of the fixed foundation (4), and the bottom of the L-shaped rod (34) is located inside the jack (36).
5. The bridge pile foundation structure suitable for the rocky steep slope according to claim 2, wherein a support plate (7) is fixed on the outer side wall of the second support pile (35) and the outer side wall of the first support pile (3), and a third spring (5) is fixedly connected between the support plate (7) and the sliding frame (6).
6. The bridge pile foundation structure suitable for the rocky steep slope according to claim 2, wherein the upper ends of the first rotating rod (23) and the third rotating rod (26) are connected with the plug (8) in a vertical sliding manner, a fourth spring (30) is connected to each of the upper ends of the first rotating rod (23) and the third rotating rod (26), and the other end of the fourth spring (30) is fixedly connected with the plug (8).
7. The bridge pile foundation structure suitable for the rocky steep slope according to claim 2, wherein a clamping cylinder (17) is arranged inside each of the first sliding frame (6) and the second sliding frame (41), a bayonet (2) is arranged on one side, corresponding to the nut (10), of the clamping cylinder (17), and the bayonet (2) is matched with the nut (10) in shape.
8. The bridge pile foundation structure suitable for the rocky steep slope according to claim 2, wherein the bottom of the fixed plate (9) in contact with the bolt (18) is provided with a limiting groove (16), and the limiting groove (16) is matched with the shape of the lower end of the bolt.
9. The bridge pile foundation structure suitable for the rocky steep slope according to claim 2, wherein the side of the fixture block (13) far away from the first spring (12) is an inclined surface.
10. Bridge pile foundation structure suitable for use on rocky slopes, according to claim 2, wherein the first (3) and second (35) support piles each comprise an inner support column (29) and a reinforcing layer (40) outside the support column (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210169166.0A CN114351750A (en) | 2022-02-23 | 2022-02-23 | Bridge pile foundation structure suitable for rock mass abrupt slope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210169166.0A CN114351750A (en) | 2022-02-23 | 2022-02-23 | Bridge pile foundation structure suitable for rock mass abrupt slope |
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| Publication Number | Publication Date |
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| CN114351750A true CN114351750A (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210169166.0A Pending CN114351750A (en) | 2022-02-23 | 2022-02-23 | Bridge pile foundation structure suitable for rock mass abrupt slope |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130121622A (en) * | 2012-04-27 | 2013-11-06 | (주)아리터 | Connecting apparatus for supporting pile, supporting pile with the same and construction method of supporting pile using the same |
| CN110396917A (en) * | 2019-07-13 | 2019-11-01 | 济邦建设集团有限公司 | A kind of spliced pier stud of viaduct |
| CN210507142U (en) * | 2019-04-29 | 2020-05-12 | 中交四航局第一工程有限公司 | Positioning adjustment device for concrete assembled bridge pier |
| CN213013848U (en) * | 2020-05-13 | 2021-04-20 | 江苏瑞沃建设集团有限公司 | Connection structure of assembled bridge |
| CN214401463U (en) * | 2021-02-02 | 2021-10-15 | 陈巍 | Bridge pile foundation reinforced structure convenient to construction |
-
2022
- 2022-02-23 CN CN202210169166.0A patent/CN114351750A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130121622A (en) * | 2012-04-27 | 2013-11-06 | (주)아리터 | Connecting apparatus for supporting pile, supporting pile with the same and construction method of supporting pile using the same |
| CN210507142U (en) * | 2019-04-29 | 2020-05-12 | 中交四航局第一工程有限公司 | Positioning adjustment device for concrete assembled bridge pier |
| CN110396917A (en) * | 2019-07-13 | 2019-11-01 | 济邦建设集团有限公司 | A kind of spliced pier stud of viaduct |
| CN213013848U (en) * | 2020-05-13 | 2021-04-20 | 江苏瑞沃建设集团有限公司 | Connection structure of assembled bridge |
| CN214401463U (en) * | 2021-02-02 | 2021-10-15 | 陈巍 | Bridge pile foundation reinforced structure convenient to construction |
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