CN114592429A - Arch rib and wind bracing assisted splicing construction system and construction method of tied arch bridge - Google Patents
Arch rib and wind bracing assisted splicing construction system and construction method of tied arch bridge Download PDFInfo
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- CN114592429A CN114592429A CN202111587919.1A CN202111587919A CN114592429A CN 114592429 A CN114592429 A CN 114592429A CN 202111587919 A CN202111587919 A CN 202111587919A CN 114592429 A CN114592429 A CN 114592429A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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Abstract
本发明公开了一种系杆拱桥拱肋及风撑辅助拼接施工体系及施工方法，包括拱肋拼接可调支架体系、风撑安装支架，其中拱肋拼接可调支架体系包括多个拱肋拼接可调支架，由各个拱肋拼接可调支架配合支撑两道纵向的拱肋，风撑安装支架用于将待拼接风撑吊至两道拱肋之间。本发明方法通过拱肋拼接可调支架体系、风撑安装支架完成拱肋与风撑拼接前的组装对位工作，完成后可拆去拱肋拼接可调支架体系、风撑安装支架。本发明减少了现场搭设临时支架的作业量，作业效率高，为风撑的安装提供稳定可靠的支撑，保证了风撑的安装精度。
The invention discloses a tie-rod arch bridge arch rib and wind bracing auxiliary splicing construction system and construction method, including an arch rib splicing adjustable bracket system and a wind bracing installation bracket, wherein the arch rib splicing adjustable bracket system comprises a plurality of arch rib splicing The adjustable bracket is spliced by each arch rib and the adjustable bracket supports two longitudinal arch ribs, and the wind brace installation bracket is used to hoist the wind brace to be spliced between the two arch ribs. The method of the invention completes the assembling and alignment work before the arch rib and the wind bracing are spliced through the arch rib splicing adjustable bracket system and the wind bracing installation bracket, and the arch rib splicing adjustable bracket system and the wind bracing installation bracket can be removed after completion. The invention reduces the workload of erecting temporary supports on site, has high working efficiency, provides stable and reliable support for the installation of the wind bracing, and ensures the installation accuracy of the wind bracing.
Description
Technical Field
The invention relates to the field of tied arch bridge arch rib wind bracing construction systems, in particular to a tied arch bridge arch rib and wind bracing auxiliary splicing construction system and a construction method.
Background
The arch rib is used as a main bearing component of the arch bridge, and the construction quality of the arch rib is directly related to the bearing capacity of the bridge. However, the arch rib structure has large size and complicated line type, so that the construction difficulty is also high. When the arch rib is assembled on site, a temporary support frame is usually required to be erected to temporarily support the arch rib segment. However, due to the change of the axis of the arch rib, temporary support frames with different heights need to be erected, the field operation amount is extremely large, and the construction period is long. In order to improve the stability of the arch ribs, a wind brace is usually required to be arranged between the two arch ribs, so that the transverse stability of the arch ribs is improved; however, because the wind brace is installed in high-altitude operation, the general crane is difficult to hoist the wind brace to a specified height; in the installation process, need provide reliable and stable support for the wind brace, guarantee the installation accuracy of wind brace and operating personnel's safety.
Disclosure of Invention
The invention aims to provide a tie rod arch bridge arch rib and wind brace auxiliary splicing construction system and a construction method aiming at the problem of great construction difficulty in the tie rod arch bridge arch rib and wind brace construction process.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
tie rod arched bridge arch rib and wind brace are supplementary to splice construction system, including adjustable support system of arch rib concatenation, wind brace installing support, wherein:
the adjustable arch rib splicing support system comprises a plurality of adjustable arch rib splicing supports distributed in a transverse and longitudinal array mode, each adjustable arch rib splicing support comprises a vertical outer supporting steel cylinder (21), an inner telescopic steel cylinder (25) is vertically and slidably mounted in each outer supporting steel cylinder (21), the upper end of each inner telescopic steel cylinder (25) penetrates out of the upper end of each outer supporting steel cylinder (21), a hoisting and lifting device is mounted at the top of each outer supporting steel cylinder (21), the hoisting and lifting device is connected with the inner telescopic steel cylinder (25), and the inner telescopic steel cylinders (25) are driven to vertically slide by the hoisting and lifting device; the top of each inner telescopic steel cylinder (25) is respectively fixedly supported with a first hydraulic jack (35), the ejector rod end of each first hydraulic jack (35) is vertically upward, the ejector rod ends of the first hydraulic jacks (35) in the same transverse direction are jointly supported and fixed with a distribution cross beam (4), so that a plurality of distribution cross beams (4) in different transverse directions are arranged, sliding blocks (41) are respectively installed at the two transverse sides of the top of each distribution cross beam (4) in a transverse sliding mode, a lead screw driving mechanism is respectively installed on each distribution cross beam (4) corresponding to each sliding block (41), the lead screw driving mechanisms are connected with the corresponding sliding blocks (41) to form a lead screw sliding block mechanism, and a second hydraulic jack (45) with the ejector rod end vertically upward is respectively fixed on each sliding block (41); each distribution crossbeam (4) is matched with and used for placing two longitudinally extending arch ribs (6), wherein one arch rib is supported by the ejector rod ends of the second hydraulic jacks (45) on the sliders (41) on one side in the same transverse direction on each distribution crossbeam (4), and the other arch rib is supported by the ejector rod ends of the second hydraulic jacks (45) on the sliders (41) on the other side in the same transverse direction on each distribution crossbeam (4);
the wind bracing mounting bracket comprises an upper bearing rod (53) which is transversely arranged at the top of the two arch ribs (6) in a pressing mode, a lower bearing rod (54) is arranged below the two arch ribs (6) and corresponds to the upper bearing rod (53), hoisting devices are respectively arranged on two transverse sides of the top of the upper bearing rod (53), the hoisting devices are connected with the lower bearing rod (54), and the lower bearing rod is hoisted by the hoisting devices; a plurality of vertical jacks (58) are fixed on the lower bearing rod (54), the top rod ends of the vertical jacks (58) vertically and upwards support the wind braces (61) to be spliced together, clamping devices are respectively fixed on the lower bearing rod (54) outside two symmetric sides of the wind braces (61), and the clamping devices are respectively clamped and supported on the corresponding sides of the wind braces (61); the lower support rod (54) and the wind bracing (61) are integrally hoisted to the position, between two arch ribs (6), of the wind bracing (61) by the hoisting device on the upper bearing rod (53) so as to assist two splicing ends of the subsequent wind bracing (61) to be spliced to the two arch ribs (6) in a one-to-one correspondence manner.
The invention also comprises a plurality of longitudinally extending rails (14), the longitudinal direction of each rail (14) is longitudinally corresponding to the longitudinal direction of a transverse-longitudinal array formed by the plurality of arch rib splicing adjustable supports, the bottoms of the outer supporting steel cylinders (21) in each arch rib splicing adjustable support in the same longitudinal direction are slidably installed on the corresponding longitudinal rails (14), and the rails (14) are provided with brake blocks (13).
In each arch rib splicing adjustable support, a hoisting lifting device at the top of an outer support steel cylinder (21) comprises a plurality of lifting motors (31), steel wire ropes (32) are respectively wound on output shafts of the lifting motors (31), each steel wire rope (32) respectively penetrates downwards into the outer support steel cylinder (21), and the rope end of each steel wire rope (32) is respectively and fixedly connected with an inner telescopic steel cylinder (25);
and guide pulleys (29) are respectively and rotatably arranged on the extension paths of the inner wall of the outer support steel cylinder (21) and the outer wall of the inner telescopic steel cylinder (25) positioned in the outer support steel cylinder (21) corresponding to each steel wire rope (32), and the corresponding steel wire ropes (32) are wound by the guide pulleys (29).
In each arch rib splicing adjustable support, a vertical limiting shaft (23) is fixed at the bottom in an outer supporting steel cylinder (21), a buffer bottom plate (22) is vertically and slidably mounted on the limiting shaft (23), a compression spring (24) sleeved outside the limiting shaft (23) is connected between the bottom of the buffer bottom plate (22) and the bottom in the outer supporting steel cylinder (21), a bottom plate through hole (27) is formed in the position, corresponding to the limiting shaft (23), of the bottom of an inner telescopic steel cylinder (25), and the limiting shaft (23) can penetrate through the bottom plate through hole (27) in the bottom of the inner telescopic steel cylinder (25).
In each arch rib splicing adjustable support, a plurality of locking through holes (210) are respectively formed in the side wall of an outer supporting steel cylinder (21) and the side wall of an inner telescopic steel cylinder (25), locking screw rods (33) are configured in the locking through holes (210), the locking screw rods (33) can penetrate through the locking through holes in the side wall of the outer supporting steel cylinder (21) in a threaded mode and then are screwed into the locking through holes in the side wall of the inner telescopic steel cylinder (25), and heads exposed out of the locking through holes in the side wall of the outer supporting steel cylinder (21) are reserved on the locking screw rods (33); in the arch rib splicing adjustable support system, adjustable telescopic rods (34) are respectively arranged between the transversely adjacent arch rib splicing adjustable supports and the longitudinally adjacent arch rib splicing adjustable supports, and two ends of each adjustable telescopic rod (34) are respectively screwed at the exposed heads of locking screw rods (33) on the side walls of the outer support steel cylinders (21) in the two corresponding adjacent arch rib splicing adjustable supports.
In each arch rib splicing adjustable bracket, the screw rod driving mechanism comprises a screw rod motor (42), and the screw rod output end of the screw rod motor (42) is screwed through the threaded through hole of the corresponding slide block (41), so that a screw rod slide block mechanism is formed.
In each arch rib splicing adjustable support, a cushion block (44) is fixed at the top of a sliding block (41), and the cushion block (44) and a second hydraulic jack (45) are matched to jointly support the corresponding arch rib (6); and a locking support rod (43) is further arranged between the two transverse sides of each sliding block (41) and the corresponding side of the bottom of the corresponding arch rib (6), one end of each locking support rod (43) is hinged to the corresponding side of the corresponding sliding block (41), and the other end of each locking support rod (43) is hinged to the corresponding side of the bottom of the corresponding arch rib (6).
The wind brace mounting bracket further comprises limiting rods (51) which are arranged on the upper surface and the lower surface of the arch rib (6) in a pressing mode, the limiting rods (51) on the upper surface and the lower surface are connected through split bolts (52), the limiting rods (51) are fixed on the upper surface and the lower surface of the arch rib (6), the upper bearing rod (53) is tightly attached to the limiting rod (51) on the upper surface when being arranged on the arch rib (6) in a pressing mode, the limiting of the upper bearing rod (53) is achieved through the limiting rod (51) on the upper surface, the lower bearing rod (54) is tightly attached to the limiting rod on the lower surface when the wind brace (61) is located between two arch ribs (6) in a hanging mode, and the limiting of the lower bearing rod (54) is achieved through the limiting rod on the lower surface.
In the wind brace mounting bracket, a hoisting device at the top of an upper carrier bar (53) is a crane (56), and slings of the crane (56) are respectively connected to a lower carrier bar (54).
In the wind brace mounting bracket, the clamping devices on the two sides of the lower bearing rod (54) respectively comprise a reaction frame (57) and a horizontal jack (59), the reaction frame (57) is fixed on the lower bearing rod (54), the horizontal jack (59) is fixed on the reaction frame (57), and the top rod end of the horizontal jack (59) horizontally abuts against the corresponding side of the wind brace (61).
In the wind brace mounting bracket, the lower bearing rod (54) is also provided with a plurality of telescopic screws (510) in a screwing way, and when the lower bearing rod (54) is hung to the wind brace (61) and positioned between two arch ribs (6), the upper ends of the telescopic screws (510) respectively abut against the bottoms of the arch ribs (6).
A construction method for splicing arch ribs and wind braces of a tied arch bridge comprises the following construction steps:
step 1, installing and fixing a track (14);
step 2, transporting the arch rib splicing adjustable support to a construction site, supporting a supporting pulley (11) of the arch rib splicing adjustable support in a track (14), sliding the arch rib splicing support to a specified position along the track (14), and then placing a brake block (13) on the track (14);
step 3, starting a lifting motor (31) on the outer support steel cylinder (21), adjusting the extension length of the inner telescopic steel cylinder (25), and after the height of the inner telescopic steel cylinder (25) is adjusted to be in place, using a locking screw (33) to penetrate through a locking through hole (210) to lock the relative positions of the inner telescopic steel cylinder (25) and the outer support steel cylinder (21); connecting and fixing the adjacent arch rib splicing adjustable supports by using an adjustable telescopic rod (34), and fixing two ends of the adjustable telescopic rod (34) by using locking screw rods (33) respectively;
step 7, adjusting the elevation and the plane position of the wind brace (61) through a vertical jack (58) and a horizontal jack (59) on the lower bearing rod (54), and connecting the wind brace (61) with the arch rib (6) after the adjustment is in place;
and 8, after the arch rib (6) and the wind brace (61) are installed in place, respectively detaching the wind brace installation support and the arch rib splicing adjustable support from top to bottom.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
1. the adjustable arch rib splicing support provided by the invention can be quickly installed in place, the workload of building a temporary support on site is greatly reduced, and the operation efficiency is high.
2. The height of the adjustable arch rib splicing support can be adjusted, the height is adjusted primarily through the inner telescopic steel cylinder, and then the height is adjusted accurately through the hydraulic jack on the support, so that the installation precision is high.
3. The wind bracing on the arch rib is hoisted in place through the wind bracing mounting bracket, and stable and reliable support is provided for the installation of the wind bracing.
4. The wind brace mounting bracket is provided with a horizontal jack and a vertical jack, and before the wind brace is mounted and fixed, the position of the wind brace is accurately adjusted, so that the mounting accuracy of the wind brace is ensured.
Drawings
FIG. 1 is a schematic view (front view) of the working state of an adjustable support for splicing arch ribs;
FIG. 2 is a schematic view (side view) of the working state of the rib splicing adjustable bracket;
FIG. 3 is a cross-sectional view of an adjustable rib splice bracket;
FIG. 4 is a partial structural view of the adjustable support for rib splicing in a contracted state;
FIG. 5 is a partial structural view of the adjustable support for rib splicing in an extended state;
FIG. 6 is a schematic structural view (front view) of the wind brace mounting bracket in an operating state;
fig. 7 is a structural schematic diagram (side view) of the wind brace mounting bracket in an operating state.
The figure is marked with: 11-supporting pulleys, 12-bearing plates, 13-brake blocks, 14-rails, 21-outer supporting steel cylinders, 22-buffer bottom plates, 23-limiting shafts, 24-compression springs, 25-inner telescopic steel cylinders, 26-stiffening plates, 27-bottom plate through holes, 28-fixed lug plates, 29-guide pulleys, 210-locking through holes, 31-lifting motors, 32-steel wires, 33-locking screws, 34-adjustable telescopic rods, 35-hydraulic jack I, 4-distribution cross beams, 41-sliding blocks, 42-screw rod motors, 43-locking supporting rods, 44-cushion blocks, 45-hydraulic jack II, 51-limiting rods, 52-split bolts, 53-upper bearing rods and 54-lower bearing rods, 55-connecting rod, 56-crane, 57-reaction frame, 58-vertical jack, 59-horizontal jack, 510-telescopic screw rod, 6-arch rib and 61-wind brace.
Detailed Description
For a better understanding of the present invention, the following embodiments will be described in detail with reference to fig. 1 to 7, and the following embodiments are implemented on the premise of the technical solution of the present invention, and the detailed embodiments are given, but the scope of the present invention is not limited to the following embodiments.
The invention relates to a tied arch bridge arch rib and wind brace auxiliary splicing system, which consists of an arch rib splicing adjustable support and a wind brace mounting support; as shown in fig. 1, 2 and 3, the adjustable arch rib splicing support comprises a supporting pulley 11, a supporting plate 12, an outer supporting steel cylinder 21, an inner telescopic steel cylinder 25, a lifting motor 31, a distribution beam 4 and the like, wherein the supporting pulley 11 is installed below the supporting plate 12, the outer supporting steel cylinder 21 is installed above the supporting plate 12, the inner telescopic steel cylinder 25 is located in the outer supporting steel cylinder 21, locking through holes 210 are formed in the outer supporting steel cylinder 21 and the inner telescopic steel cylinder 25, locking screws 33 are inserted into the locking through holes 210, the lifting motor 31 is located at the top of the outer supporting steel cylinder 21, and a steel wire rope 32 on the lifting motor 31 is fixed on a fixing lug plate 28 at the bottom end of the inner telescopic steel cylinder 25; the top of the inner telescopic steel cylinder 25 is provided with a first hydraulic jack 35, and the distribution crossbeam 4 is supported on the adjacent first hydraulic jack 35; two ends of the distribution beam 4 are respectively provided with a screw motor 42, the screw motor 42 is connected with a sliding block 41, the sliding block 41 is provided with a cushion block 44 and a second hydraulic jack 45, and the arch rib 6 is supported on the cushion block 44 and the second hydraulic jack 45; be equipped with adjustable telescopic link 34 between the adjustable support of rib concatenation, the tip and the locking screw 33 of adjustable telescopic link 34 are fixed, through set up adjustable telescopic link 34 between adjacent rib concatenation adjustable support, can show the stability that promotes the adjustable support of rib concatenation. The supporting pulley 11 is supported on the rail 14, the brake block 13 is arranged between the supporting pulley 11 and the rail 14, and the position of the arch rib splicing adjustable support can be quickly adjusted by arranging the rail 14, so that the field operation efficiency is improved. And a locking support rod 43 is arranged between the sliding block 41 and the arch rib 6, and after the arch rib 6 is adjusted in position, the locking support rod 43 is used for further fixing, so that the splicing precision of the arch rib 6 is ensured.
As shown in fig. 3, a stiffening plate 26 is arranged on the top plate of the inner telescopic steel cylinder 25, and a bottom plate through hole 27 is arranged on the bottom plate of the inner telescopic steel cylinder 25; as shown in fig. 4 and 5, a buffer bottom plate 22, a limiting shaft 23 and a compression spring 24 are arranged on the bottom plate of the outer support steel cylinder 21, the limiting shaft 23 is fixed on the bottom plate of the outer support steel cylinder 21, the compression spring 24 is sleeved on the limiting shaft 23, the buffer bottom plate 22 is supported on the compression spring 24, the bottom plate of the inner telescopic steel cylinder 25 can be supported on the buffer bottom plate 22, and the limiting shaft 23 can pass through a bottom plate through hole 27 of the inner telescopic steel cylinder 25. The top of the outer supporting steel cylinder 21 and the bottom of the inner telescopic steel cylinder 25 are both provided with guide pulleys 29, and by arranging the guide pulleys 29, the friction force between the inner telescopic steel cylinder 25 and the outer supporting steel cylinder 21 can be reduced, and the reliability of a telescopic structure is improved.
As shown in fig. 6 and 7, the wind bracing mounting bracket is composed of a limiting rod 51, a tie bolt 52, an upper bearing rod 53, a lower bearing rod 54, a connecting rod 55 and the like, the limiting rod 51 is mounted and fixed on the upper and lower surfaces of the arch rib 6 by using the tie bolt 52, the two upper bearing rods 53 or the lower bearing rods 54 are fixed by using the connecting rod 55, the upper bearing rod 53 is supported on the arch rib 6 and clings to the limiting rod 51 on the arch rib 6, small cranes 56 are arranged at two ends of the upper bearing rod 53, the lower bearing rod 54 is lifted to the lower side of the arch rib 6 by the cranes 56, a reaction frame 57, a vertical jack 58, a horizontal jack 59 and a telescopic screw 510 are arranged on the lower bearing rod 53, the wind bracing 61 is supported on the vertical jack 58, and the telescopic screw 510 butts against the lower surface of the arch rib 6.
The arch rib and wind brace splicing construction method based on the tied arch bridge arch rib and wind brace auxiliary splicing system comprises the following construction steps:
step 1. installing and fixing the rail 14.
And 2, transporting the arch rib splicing adjustable support to a construction site, supporting a supporting pulley 11 of the arch rib splicing adjustable support in a rail 14, sliding the arch rib splicing support to a specified position along the rail 14, and then placing a brake block 13 on the rail 14.
Step 3, starting a lifting motor 31 on the outer support steel cylinder 21, adjusting the extension length of the inner telescopic steel cylinder 25, and after the height of the inner telescopic steel cylinder 25 is adjusted in position, using a locking screw 33 to penetrate through a locking through hole 210 to lock the relative positions of the inner telescopic steel cylinder 25 and the outer support steel cylinder 21; the adjustable supports for splicing adjacent arch ribs are connected and fixed by using an adjustable telescopic rod 34, and two ends of the adjustable telescopic rod 34 are fixed by using locking screw rods 33 respectively.
And 4, supporting the two ends of the distribution beam 4 on first hydraulic jacks 35, and adjusting the heights of the first hydraulic jacks 35 to enable the distribution beam 4 to be horizontal.
And 7, adjusting the elevation and the plane position of the wind brace 61 through the vertical jack 58 and the horizontal jack 59 on the lower bearing rod 54, and connecting the wind brace 61 with the arch rib 6 after the adjustment is in place, as shown in the attached figures 6 and 7.
And 8, after the arch rib 6 and the wind brace 61 are installed in place, respectively detaching the wind brace installation support and the arch rib splicing adjustable support from top to bottom.
The present invention has been described in detail with reference to the embodiments, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111587919.1A CN114592429B (en) | 2021-12-23 | 2021-12-23 | Auxiliary splicing construction system and construction method for tied arch bridge arch rib and air bracing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111587919.1A CN114592429B (en) | 2021-12-23 | 2021-12-23 | Auxiliary splicing construction system and construction method for tied arch bridge arch rib and air bracing |
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| Publication Number | Publication Date |
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| CN114592429A true CN114592429A (en) | 2022-06-07 |
| CN114592429B CN114592429B (en) | 2023-12-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115125841A (en) * | 2022-06-10 | 2022-09-30 | 中电建路桥集团有限公司 | Component multi-angle adjustment positioner |
| CN116043704A (en) * | 2023-01-04 | 2023-05-02 | 中国化学工程第三建设有限公司 | A mixed construction method of single and double limbs for long-span steel arch bridges |
| CN116988361A (en) * | 2023-07-12 | 2023-11-03 | 安徽省路港工程有限责任公司 | Steel tube concrete main arch ring and its construction method |
| CN119658640A (en) * | 2025-02-17 | 2025-03-21 | 保利长大工程有限公司 | An auxiliary installation system capable of improving the splicing accuracy of loose-joined brackets |
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| US20210164176A1 (en) * | 2020-11-12 | 2021-06-03 | China Railway No.3 Engineering Group Co.Ltd | Method For Installing Steel Tube Arches |
| CN113699887A (en) * | 2021-08-19 | 2021-11-26 | 中交二公局第三工程有限公司 | Polygonal steel arch rib assembling and positioning device and using method thereof |
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| CN103628417A (en) * | 2013-12-19 | 2014-03-12 | 中铁六局集团有限公司 | Coordinate adjustment device for mounting arch section of steel arch pipe by supporting method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115125841A (en) * | 2022-06-10 | 2022-09-30 | 中电建路桥集团有限公司 | Component multi-angle adjustment positioner |
| CN116043704A (en) * | 2023-01-04 | 2023-05-02 | 中国化学工程第三建设有限公司 | A mixed construction method of single and double limbs for long-span steel arch bridges |
| CN116988361A (en) * | 2023-07-12 | 2023-11-03 | 安徽省路港工程有限责任公司 | Steel tube concrete main arch ring and its construction method |
| CN119658640A (en) * | 2025-02-17 | 2025-03-21 | 保利长大工程有限公司 | An auxiliary installation system capable of improving the splicing accuracy of loose-joined brackets |
| CN119658640B (en) * | 2025-02-17 | 2025-04-15 | 保利长大工程有限公司 | Auxiliary installation system capable of improving splicing precision of split bracket |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114592429B (en) | 2023-12-08 |
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