CN114197315A - Construction method of spiral hyperbolic structure obliquely pulled by space cable-plane combined system - Google Patents
Construction method of spiral hyperbolic structure obliquely pulled by space cable-plane combined system Download PDFInfo
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- CN114197315A CN114197315A CN202111610951.7A CN202111610951A CN114197315A CN 114197315 A CN114197315 A CN 114197315A CN 202111610951 A CN202111610951 A CN 202111610951A CN 114197315 A CN114197315 A CN 114197315A
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- 238000000034 method Methods 0.000 claims description 19
- 238000004458 analytical method Methods 0.000 claims description 11
- 238000004088 simulation Methods 0.000 claims description 9
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
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- 238000005452 bending Methods 0.000 description 2
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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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention discloses a construction method of a spiral hyperbolic structure obliquely pulled by a space cable-plane combined system, which belongs to the technical field of building construction and comprises the following steps: at least two conversion joints are arranged on the spiral ramp segment; building a jig frame, wherein the jig frame comprises a joist, the joist is arranged at a designated position, the upper surface of the joist is provided with at least two vertical supporting sections, and when the joist is arranged at the designated position, the conversion sections are correspondingly arranged on the vertical supporting sections one by one; adjusting the segmented posture of the spiral ramp to a design posture, and connecting the conversion sections with the vertical supporting sections in a one-to-one correspondence manner through connecting pieces; forming spiral ramps after the installation of all the spiral ramp sections is completed, installing a stay cable on each spiral ramp section, and performing initial installation and pre-tightening on the stay cables; disassembling the connecting piece; and finally tensioning the stay cable in place. The invention can quickly finish the construction of the spiral hyperbolic structure which is obliquely pulled by the space cable-plane combination system with high quality.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of a spiral hyperbolic structure obliquely pulled by a space cable-plane combined system.
Background
In the field of cable-stayed bridge construction, the most common construction method is cantilever construction. The method is characterized in that beam body segments are symmetrically assembled sequentially from two sides of a tower column by using hoisting equipment, a stay cable is stayed to be a section after the section is assembled, extra temporary support is not needed during construction, and bridge bodies on two sides of the tower column symmetrically extend outwards in a self-balancing mode until the bridge bodies on two sides are closed.
However, in some non-linear cable-stayed bridge construction, the self-balancing construction cannot be performed on site due to the asymmetry of the bridge structure.
Disclosure of Invention
The invention aims to provide a construction method of a spiral hyperbolic structure obliquely pulled by a space cable-plane combination system, which can quickly finish the construction of the spiral hyperbolic structure with high quality.
As the conception, the technical scheme adopted by the invention is as follows:
a construction method of a spiral hyperbolic structure obliquely pulled by a space cable-plane combined system comprises the following steps:
s1, installing at least two conversion joints on the spiral ramp segment;
s2, setting up a jig frame, wherein the jig frame comprises a joist, the joist is arranged at a designated position, the upper surface of the joist is provided with at least two vertical supporting sections, and when the joist is arranged at the designated position, the conversion sections are correspondingly arranged on the vertical supporting sections one by one;
s3, adjusting the posture of the spiral ramp segment to a design posture, and connecting the conversion sections with the vertical support sections in a one-to-one correspondence manner through connecting pieces;
s4, forming the spiral ramps after the installation of all the spiral ramp sections is completed, installing stay cables on each spiral ramp section, and performing initial installation and pre-tightening on the stay cables;
s5, disassembling the connecting piece;
and S6, finally tensioning the stay cable in place.
Optionally, a first flange is arranged at the lower end of the conversion joint, and the first flange extends along the horizontal direction; a second flange is arranged at the upper end of the vertical supporting section and extends along the horizontal direction;
in step S3, the connecting members connect the second flanges and the first flanges in a one-to-one correspondence.
Optionally, in the step S6, during the final tensioning of the stay cable, the first flange is gradually lifted upwards to be separated from the second flange.
Optionally, a tetrafluoroethylene pad is attached to the upper surface of the second flange.
Optionally, the jig frame further comprises a lower support longitudinal beam, and a plurality of longitudinal beams are arranged on the lower surface of the joist at intervals;
in step S2, the lower support stringer is buried in a buried position so that the joist is located at the predetermined position.
Optionally, before the step S1, the following steps are also required:
and S0, carrying out whole-process construction simulation technical analysis.
Optionally, the step S0 includes:
s01, determining the machining, manufacturing and mounting accuracy of the spiral hyperbolic structure according to the requirements of a design drawing;
s02, determining the number of the spiral ramp sections of the spiral double-curved structure and the construction sequence of each spiral ramp section;
s03, integrally modeling the spiral hyperbolic structure, and performing construction simulation analysis;
and S04, determining and optimizing the deformation preset integer value and the stress monitoring value of each spiral ramp segment in the construction process.
Optionally, the stay cable comprises:
the anchor cup connecting plate is fixedly arranged on the spiral ramp segment;
the cable comprises a cable body, wherein one end of the cable body is provided with an anchor cup type cable head, the other end of the cable body is provided with a fork ear type cable head, and the fork ear type cable head is configured to be connected with an ear plate;
in step S1, the anchor cup type cable head is attached to the anchor cup attaching plate when the stay cable is attached.
Optionally, a sleeve is sleeved on the free end of the anchor cup type cable head;
in step S1, when the stay cable is installed, the sleeve is welded to the anchor cup connecting plate by adjusting the axial posture of the sleeve until the fork lug type cable head at the other end of the stay cable can be butted against the lug plate in parallel.
Optionally, in step S3, the connecting member is a bolt.
The invention provides a construction method of a spiral hyperbolic structure obliquely pulled by a space cable-plane combined system, which completes construction of the spiral hyperbolic structure by adopting a mode of building temporary supports. When needing to support, will change festival and vertical braces festival and pass through the connecting piece one-to-one and be connected, support after the completion dismantle the connecting piece can, easy operation, the efficiency of construction is high. The stay cable is finally tensioned after the connecting piece is disassembled, so that the upward and horizontal reaction force can be completely released in the tensioning process of the bridge body, the prestress value of the stay cable with the design requirement cannot be consumed in advance, and the stress requirement of the design on the structure is met.
Drawings
FIG. 1 is a schematic diagram of a spiral hyperbolic structure that is obliquely pulled by a spatial cable-plane combination system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a construction method of a spiral hyperbolic structure obliquely pulled by a space cable-plane combination system according to an embodiment of the present invention;
FIG. 3 is a schematic view of a jig frame and a spiral ramp segment when the jig frame is connected according to an embodiment of the invention;
FIG. 4 is a schematic view of a connection of a first flange and a second flange provided by an embodiment of the present invention;
fig. 5 is a schematic view of a stay cable according to an embodiment of the present invention installed on a spiral ramp section.
In the figure:
1. segmenting the spiral ramp; 11. a conversion section; 111. a first flange;
2. a jig frame; 21. a lower support stringer; 22. a joist; 23. a vertical support section; 231. a second flange;
3. a stay cable; 31. an anchor cup connecting plate; 32. a cable body; 321. an anchor cup type cable head; 322. a fork lug type cable head; 323. a sleeve; 33. an ear plate;
4. a connecting member;
5. tetrafluoroethylene backing plate.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 5, the present embodiment provides a construction method of a spiral hyperbolic structure inclined by a spatial cable-plane combination system, which includes the following steps:
s1, installing at least two conversion joints 11 on the spiral ramp segment 1;
s2, building a jig frame 2, wherein the jig frame 2 comprises a joist 22, the joist 22 is arranged at a designated position, the upper surface of the joist 22 is provided with at least two vertical supporting sections 23, and when the joist 22 is arranged at the designated position, the conversion sections 11 are correspondingly arranged on the vertical supporting sections 23 one by one;
s3, adjusting the posture of the spiral ramp segment 1 to a designed posture, and correspondingly connecting the conversion sections 11 with the vertical support sections 23 one by one through the connecting pieces 4; specifically, the three-dimensional posture of the spiral ramp segment 1 in the air is adjusted;
s4, forming the spiral ramps after the installation of all the spiral ramp sections 1 is completed, installing a stay cable 3 on each spiral ramp section 1, and performing initial installation and pre-tightening on the stay cable 3;
s5, disassembling the connecting piece 4;
and S6, finally tensioning the stay cable 3 in place.
Specifically, in step S3, the connecting member 4 is a bolt.
The construction method of the spiral hyperbolic structure inclined by the space cable-plane combination system provided by the embodiment completes the construction of the main structure of the spiral hyperbolic structure by setting up the temporary support. When needing to support, the conversion joint 11 and the vertical support joint 23 are connected in a one-to-one correspondence mode through the connecting pieces 4, and after the support is completed, the connecting pieces 4 are detached. The stay cable 3 is finally tensioned after the connecting piece 4 is disassembled, so that the upward and horizontal reaction force can be completely released in the tensioning process of the bridge body, the prestress value of the stay cable 3 required by design can not be consumed in advance, and the stress requirement of the design on the structure is met.
In this embodiment, the spiral ramp segment 1 is connected to the surrounding building by stay cables 3.
In this embodiment, the jig frame 2 is a temporary supporting device, and a plurality of vertical supporting sections 23 are provided to form a multi-point supporting type temporary supporting device. Specifically, in the actual construction process, the number and the distribution form of the vertical support sections 23 may be set as needed.
Further, in the stage of construction scheme formulation, in order to ensure the safety of the installation and use states of the spiral ramp, the main structure of the spiral ramp and the jig frame 2 are integrally modeled, and the interaction among the hyperbolic bridge body structure, the flexible stay cable and the floor frame structure is comprehensively considered through the analysis of the whole-process construction simulation technology, so that the deformation pre-adjustment value and the stress monitoring value of each construction stage are obtained. Specifically, before step S1, the following steps are also required:
and S0, carrying out whole-process construction simulation technical analysis.
Specifically, step S0 includes:
s01, determining the machining, manufacturing and mounting accuracy of the spiral hyperbolic structure according to the requirements of a design drawing;
s02, determining the number of spiral ramp sections 1 of the spiral hyperbolic structure and the construction sequence of each spiral ramp section 1;
s03, integrally modeling the spiral hyperbolic structure, and performing construction simulation analysis;
and S04, determining and optimizing the deformation preset integer value and the stress monitoring value of each spiral ramp segment 1 in the construction process.
Specifically, in the analysis of the whole-process construction simulation technology, the jig frame 2 and the conversion joint 11 also adopt the digital modeling technology to realize the processing, assembly and pre-assembly in a factory in the same batch as the spiral ramp section 1. After the component is transported to the site, rapid assembly is only needed.
Specifically, in the present embodiment, the upper end of the conversion section 11 is set out in the factory in advance according to the profile of the bottom of the bridge body and is assembled on the spiral ramp segment 1.
Specifically, in the present embodiment, the jig frame 2 further includes a lower support longitudinal beam 21, and a plurality of longitudinal beams 21 are disposed on the lower surface of the joist 22 at intervals.
In step S2, the lower support side member 21 is buried in the embedded position so that the joist 22 is located at the predetermined position.
Referring to fig. 5, in the present embodiment, the stay cable 3 includes an anchor cup connecting plate 31 and a cable body 32.
The anchor cup connecting plate 31 is fixedly arranged on the spiral ramp segment 1; one end of the cable body 32 is provided with an anchor cup type cable head 321, and the other end of the cable body 32 is provided with a fork ear type cable head 322, and the fork ear type cable head 322 is configured to be connected with the ear plate 33. In step S1, when the stay cable 3 is attached, the anchor cup type cable head 321 is attached to the anchor cup attachment plate 31.
Further, a sleeve 323 is sleeved on the free end of the anchor cup type cable head 321. In step S1, when the stay cable 3 is attached, the axial posture of the sleeve 323 is adjusted until the fork lug type cable head 322 at the other end of the stay cable 3 can be abutted against the upper lug plate 33 in parallel, and the sleeve 323 is welded to the anchor cup connecting plate 31. When the stay cable 3 is tensioned by the tool, the anchor cup type cable head 321 also plays a fulcrum role of the tensioning reaction force.
Further, the fork lug type cord head 322 is connected with the ear plate 33.
When the stay cable 3 is tensioned, the active tensioning end is arranged at the bottom of the anchor cup connecting plate 31, the tool support can obtain a stable reaction force point by clamping the anchor cup connecting plate 31, and the conventional fork-type cable head is omitted and needs to serve as a temporary reaction frame by additionally welding lug plates around the conventional fork-type cable head. After the conventional fork lug type cable head is tensioned, the temporary reaction frame needs to be cut off, polished and repaired with paint, so that the operation is complicated.
As shown in fig. 1, the hyperbolic spiral structure is a spiral ascending structure, i.e. a spiral ramp. The plurality of stay cables 3 form a stay cable group. Fig. 1 includes 4 stay cable groups. The plurality of stay cables 3 in each stay cable group are arranged in a fan shape with the lug plate 33 as the center, and the spatial angles of the cable bodies 32 connected to the spiral ramp are different. The fork-type cable head 322 and the ear plate 33 have very high butt joint precision.
In the prior art, both ends of a stay cable body are fork lug type cable heads. When the stay cable in the prior art is applied to the embodiment, the bending phenomenon of the cable head is difficult to avoid.
In order to avoid the cable head bending phenomenon, the present embodiment provides the stay cable 3, wherein one end of the cable body 32 is provided with an anchor cup type cable head 321, and the other end of the cable body 32 is provided with a fork ear type cable head 322. The anchor cup type cable head 321 is connected with the spiral ramp, and the anchor cup connecting plate 31 and the bin dividing plate on the spiral ramp form a whole plate, so that collision with other partition plates for many times is avoided, and the processing efficiency is improved.
Further, in this embodiment, the lower end of the converting joint 11 is provided with a first flange 111, and the first flange 111 extends in the horizontal direction; the upper end of the vertical support section 23 is provided with a second flange 231, and the second flange 231 extends in the horizontal direction.
In step S3, the connectors 4 connect the second flanges 231 and the first flanges 111 in a one-to-one correspondence.
Further, in step S6, during the final tension of the stay cable 3, the first flange 111 is gradually lifted up and separated from the second flange 231.
Preferably, a tetrafluoroethylene pad 5 is attached to the upper surface of the second flange 231. In this embodiment, the tetrafluoroethylene backing plate 5 is attached to the upper surface of the second flange 231, so that the frictional resistance when the first flange 111 slides horizontally relative to the second flange 231 can be reduced.
In this embodiment, the spiral ramp section 1 is connected to the surrounding building by stay cables 3. During preliminary connection, the cable body 32 of the stay cable 3 is not subjected to final tensioning temporarily, after all the connecting pieces 4 are disassembled, the jig frame 2 and the spiral ramp section 1 are in a disengagement state, upward and horizontal support counter forces of the jig frame 2 on the spiral ramp are released, downward support counter forces are reserved, and the stay cable 3 is subjected to final tensioning at the moment.
Specifically, in the tensioning stage of the cable body 32, the tetrafluoroethylene backing plate 5 with low friction resistance is adhered to the lower surface of the first flange 111, and since the conversion joint 11 is connected with the spiral ramp segment 1 into a whole, the conversion joint 11 can move smoothly in the force bearing direction on the upper surface of the second flange 231 until the conversion joint 11 is lifted upwards and separated from the jig frame 2, and unloading of the temporary support is completed.
The construction method of the spiral hyperbolic structure inclined by the space cable-plane combined system provided by the embodiment comprises three technologies, namely a construction predeformation analysis technology, a temporary supporting device technology and a stay cable tensioning technology.
The construction pre-deformation analysis technology is step S0, and the construction pre-deformation analysis technology mainly solves the problem of deformation control of the spiral ramp and provides a theoretical pre-deformation value quantified on site as an auxiliary reference. The temporary supporting device technology comprises a step S1, a step S2 and a step S3, and mainly solves the problems of structural stress conversion and structural unloading during construction. The stay cable tensioning technology comprises the steps of S4 and S6, and mainly solves the problem of linkage control of the flexible cable body tensioning stage and the deformation of the spiral ramp structure.
In the stay cable tensioning technology, the stay cable tensioning control adopts the principle of taking force control as a main principle and shape control as an auxiliary principle, the vertical deformation of a box girder is controlled on the basis of achieving prestress, and the length of a screw rod is adjusted through a stay cable and the data of an auxiliary oil pressure gauge is used for controlling the tensioning force of the stay cable. According to the simulation result, the stay cable 3 adopts a tensioning method of batch and stage. The stay cable 3 adopts a single-end tensioning mode, and the anchor cup type cable head 321 is an active tensioning end.
When the spiral ramp is constructed on site, the spiral ramp segments 1 are spliced section by section from bottom to top, so that the spiral ramp is formed. After the spiral ramp is integrally formed, 32 stay cables 3 in 4 batches are installed in place, the stay cables 3 are initially installed and pre-tightened, namely the stay cables 3 are initially twisted, a single-end tensioning mode is adopted when the stay cables 3 are initially installed and pre-tightened, and the active tensioning end is arranged at the lower hanging point of the stay cable 3. Then the connection between the jig frame 2 and the spiral ramp section 1 is released, namely the upward restraint state of the spiral ramp is released. Then the stay cables 3 are finally tensioned in place in batches, when the stay cables 3 are finally tensioned in place, the tension force of the stay cables 3 is controlled by adjusting the length of the screw rods of the stay cables 3 and assisting oil pressure gauge data until the cable force value reaches the initial state design requirement, and final screwing is finished; in the process of finally tensioning the stay cable 3 in place, the spiral ramp is gradually lifted upwards to form a separation state with the jig frame 2. And finally, dismantling all the jig frames 2 on the site after the retest and adjustment is finished.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A construction method of a spiral hyperbolic structure obliquely pulled by a space cable-plane combined system is characterized by comprising the following steps:
s1, installing at least two conversion joints (11) on the spiral ramp segment (1);
s2, setting up a jig frame (2), wherein the jig frame (2) comprises a joist (22), the joist (22) is arranged at a designated position, at least two vertical supporting sections (23) are arranged on the upper surface of the joist (22), and when the joist (22) is arranged at the designated position, the conversion sections (11) are correspondingly arranged on the vertical supporting sections (23);
s3, adjusting the posture of the spiral ramp segment (1) to a design posture, and connecting the conversion sections (11) with the vertical support sections (23) in a one-to-one correspondence manner through connecting pieces (4);
s4, forming the spiral ramps after the installation of all the spiral ramp sections (1) is completed, installing stay cables (3) on each spiral ramp section (1), and performing initial installation and pre-tightening on the stay cables (3);
s5, disassembling the connecting piece (4);
and S6, finally tensioning the stay cable (3) in place.
2. The construction method of the spiral hyperbolic structure inclined by a space cable-plane combined system according to claim 1, characterized in that a first flange (111) is provided at the lower end of the transition joint (11), the first flange (111) extends in the horizontal direction; a second flange (231) is arranged at the upper end of the vertical supporting section (23), and the second flange (231) extends along the horizontal direction;
in the step S3, the connecting members (4) connect the second flange (231) and the first flange (111) in a one-to-one correspondence.
3. The method for constructing a helical hyperbolic structure stayed by a space cable-plane composite system according to claim 2, wherein the first flange (111) is gradually lifted up and separated from the second flange (231) during the final tension of the stay cable (3) in the step S6.
4. The construction method of the helical hyperbolic structure inclined by a space cable-plane combined system according to claim 2, wherein a tetrafluoroethylene backing plate (5) is attached to the upper surface of the second flange (231).
5. The construction method of the spiral hyperbolic structure obliquely pulled by the space cable-plane combined system according to claim 1, wherein the jig frame (2) further comprises lower support longitudinal beams (21), and a plurality of longitudinal beams (21) are arranged on the lower surface of the joist (22) at intervals;
in step S2, the lower support side member (21) is buried in a buried position so that the joist (22) is positioned at the predetermined position.
6. The method for constructing a helical hyperbolic structure inclined-pulled by a spatial cable-plane combination system according to claim 1, further comprising, before step S1, the steps of:
and S0, carrying out whole-process construction simulation technical analysis.
7. The method for constructing a helical hyperbolic structure inclined-pulled by a spatial cable-plane combination system according to claim 6, wherein the step S0 includes:
s01, determining the machining, manufacturing and mounting accuracy of the spiral hyperbolic structure according to the requirements of a design drawing;
s02, determining the number of the spiral ramp sections (1) of the spiral double-curved structure and the construction sequence of each spiral ramp section (1);
s03, integrally modeling the spiral hyperbolic structure, and performing construction simulation analysis;
s04, determining and optimizing the deformation preset integer value and the stress monitoring value of each spiral ramp segment (1) in the construction process.
8. The method for constructing a helical hyperbolic structure stayed by a space cable-plane combined system according to claim 1, wherein the stay cable (3) includes:
the anchor cup connecting plate (31) is fixedly arranged on the spiral ramp segment (1);
a cable body (32), wherein one end of the cable body (32) is provided with an anchor cup type cable head (321), the other end of the cable body (32) is provided with a fork ear type cable head (322), and the fork ear type cable head (322) is configured to be connected with an ear plate (33);
in step S1, the anchor cup type cable head (321) is attached to the anchor cup attachment plate (31) when the stay cable (3) is attached.
9. The construction method of the helical hyperbolic structure inclined by a spatial cable-plane combined system according to claim 8, wherein a sleeve (323) is sleeved on the free end of the anchor cup type cable head (321);
in the step S1, when the stay cable (3) is installed, the axial posture of the sleeve (323) is adjusted until the fork lug type cable head (322) at the other end of the stay cable (3) can be abutted on the lug plate (33) in parallel, and the sleeve (323) is welded to the anchor cup connecting plate (31).
10. The method for constructing a helical hyperbolic structure inclined by a space cable-plane combined system according to any one of claims 1 to 9, wherein in step S3, the connecting member (4) is a bolt.
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| KR102244346B1 (en) * | 2020-10-14 | 2021-04-26 | 대영스틸산업주식회사 | Field Assembly-type Observation Bridge and Construction Method thereof |
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| CN111519512A (en) * | 2020-05-19 | 2020-08-11 | 江苏华通工程检测有限公司 | Combined bridge tower of curve-shaped cable-stayed bridge for super-large-span pedestrian landscape and construction method |
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