CN113174863B - Construction method of cable-stayed suspension cable cooperation system bridge - Google Patents
Construction method of cable-stayed suspension cable cooperation system bridge Download PDFInfo
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- CN113174863B CN113174863B CN202110483809.4A CN202110483809A CN113174863B CN 113174863 B CN113174863 B CN 113174863B CN 202110483809 A CN202110483809 A CN 202110483809A CN 113174863 B CN113174863 B CN 113174863B
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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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Abstract
The application relates to a construction method of a cable-stayed suspension cable cooperation system bridge, which relates to the technical field of bridge engineering, wherein a hoisting opening is formed between a cable-stayed area beam section and a suspension cable area beam section of the cable-stayed suspension cable cooperation system bridge, and the construction method comprises the following steps: dividing a cross section beam section of the cable-stayed suspension cable cooperation system bridge into a plurality of sections according to preset dividing conditions, wherein a second mounting position for mounting a pair of temporary suspenders is reserved on each section; the preset dividing conditions are as follows: the number of segments is equal to the number of pairs of permanent hangers of the cross-beam segment, and each segment has a first mounting location thereon for mounting a pair of permanent hangers; hoisting the segment to a hoisting port; respectively hoisting a permanent suspender and a temporary suspender on the first installation position and the second installation position; and the rest can be done in the same way until all the segments are hoisted to form the beam segment of the cross area. And two pairs of permanent suspenders are not needed for hoisting and supporting, so that the scale of the cable crane is reduced, and the construction cost is reduced.
Description
Technical Field
The application relates to the technical field of bridge engineering, in particular to a construction method of a cable-stayed suspension cable cooperation system bridge.
Background
The cable-stayed suspension cable cooperation system is a novel structural system integrating the advantages of a cable-stayed bridge and a suspension bridge, and can ensure that the overall stress performance of the structure is improved while the structure has larger span. At present, a suspension cable-stayed cooperative system bridge is generally provided with a cross section of a suspension rod and a suspension cable, so that the structural rigidity can be changed uniformly and smoothly while the problem of fatigue of the suspension rod at the end is solved, and the stress of a main beam is improved.
In the related art, a cable-stayed suspension cable cooperation system bridge is disclosed, which includes at least two pylons arranged along a bridge direction, and a main cable and a main beam connecting the plurality of pylons, wherein a part of the main beam located between the two pylons includes: the two sections of the beam sections of the cable-stayed area are respectively arranged close to one bridge tower, and the beam sections of the cable-stayed area are connected with the adjacent bridge towers through the stay cables of the cable-stayed area; the crossing area beam section is provided with two sections which are respectively connected with one cable-stayed area beam section, the crossing area beam section is connected with an adjacent bridge tower through crossing area stay cables and is connected with a main cable through crossing area suspension rods, and each crossing area stay cable and each crossing area suspension rod are respectively anchored at different upper chord nodes of the crossing area beam section; and the suspension cable zone beam section is positioned between the two cross zone beam sections and is connected with the main cable through the suspension cable zone suspender. Through with suspension cable and jib anchor point staggered arrangement on crossing district's beam segment, avoided setting up complicated mixed anchoring structure on the girder, also can solve suspension cable and jib space conflict problem.
However, due to the fact that the anchoring points of the stay cables and the suspension rods on the cross-area beam section are arranged in a staggered mode, when the cross-area beam section is hoisted, the cross-area beam section is divided into a plurality of sections, and each section needs to be hoisted at least corresponding to two pairs of suspension rods so as to guarantee balance of the sections; each section at least comprises four beam sections, so that the weight of the lifted section is large, the lifting weight of the cable crane is large, and the construction difficulty and cost are increased.
Disclosure of Invention
The embodiment of the application provides a construction method of a cable-stayed suspension cable cooperation system bridge, and aims to solve the problems that in the related art, the sections of beam sections in a cross area comprise at least four beam section sections, so that the weight of the lifted sections is large, the lifting weight of a cable crane is large, and the construction difficulty and cost are increased.
In a first aspect, a construction method for a cable-stayed suspension cable cooperation system bridge is provided, wherein a hoisting opening is formed between a cable-stayed area beam section and a suspension cable area beam section of the cable-stayed suspension cable cooperation system bridge, and the construction method comprises the following steps:
dividing a cross section beam section of the cable-stayed suspension cable cooperation system bridge into a plurality of sections according to preset dividing conditions, wherein a second mounting position for mounting a pair of temporary suspension rods is reserved on each section; the preset dividing conditions are as follows: the number of segments is equal to the number of pairs of permanent hangers of the cross-sectional beam section, and each segment has a first mounting location thereon for mounting a pair of permanent hangers;
hoisting the segment to the hoisting port;
respectively hoisting a permanent suspender and a temporary suspender on the first installation position and the second installation position;
and the rest is done in the same way until all the sections are hoisted to form the beam section of the cross area.
In some embodiments, the preset dividing condition further includes: a third mounting location on each of said segments containing a pair of stay cables; a gap or partial overlap exists between the third mounting location and the second mounting location.
In some embodiments, when the third mounting position is fully coincident with the second mounting position; after hoisting all the segments, the method also comprises the following steps:
removing all temporary suspenders;
and anchoring the stay cables at the second mounting position to form the cross-sectional beam section.
In some embodiments, the length of the segment is the length between two segments of the cross-sectional beam segment.
In some embodiments, hoisting the temporary boom at the second installation location specifically comprises the steps of:
removably connecting a bottom end of the temporary boom to the segment;
and the top end of the temporary suspender is detachably connected with a main cable of the cable-stayed suspension cable cooperation system bridge through a locking structure.
In some embodiments:
the temporary suspension rod is U-shaped and comprises a first section, a second section and an arc-shaped third section, wherein the first section and the second section are vertically arranged side by side, and the arc-shaped third section is connected between the first section and the second section; the first section and the second section are arranged on the sections at intervals along the transverse bridge direction;
the locking structure includes:
the locking clamp is matched with the main cable and clamped on the main cable, and the locking clamp is provided with cable bearing grooves distributed along the circumferential direction of the locking clamp; the third section is wound in the cable bearing groove;
the fixing clamp is horizontally clamped on the first section and the second section and used for tightening the transverse distance between the first section and the second section, so that the transverse distance between the first section and the second section is equal to the transverse distance between the bottom ends of the first section and the second section.
In some embodiments, the length of the temporary boom is as follows:
L＝2×L0-2×(ΔL1+ΔL2+ΔL3)
in the above formula:
in the formula: l is the length of the temporary hanging rod; t is the beam-end internal force of the first section or the second section; e is the modulus of elasticity of the temporary suspender; gamma is the volume weight of the temporary suspender; a is the cross-sectional area of the temporary suspender; r is the sum of the radius of the cable bearing groove and the radius of the cross section of the temporary suspender; h is1The vertical distance between the connecting point between the first section and the segment and the fixing clip; h is2The vertical distance between the circle center of the cable bearing groove and the fixing clamp is the vertical distance; d is the lateral distance between the bottom ends of the first and second segments.
In some embodiments, the method of construction further comprises the step of acquiring a beam-end internal force of the first section.
In some embodiments, the step of obtaining the beam-end internal force of the first section specifically includes:
establishing a finite element model, and simulating the hoisting process of the beam section in the cross area;
when the closure opening meets a preset closure condition, acquiring the beam end internal force of a temporary suspender in the finite element model; the preset closure conditions are as follows: and the displacement difference and the rotation angle difference between the beam sections at the two ends of the closure opening meet a threshold value.
In some embodiments, after forming the cross-sectional beam section, the method further comprises the steps of:
and respectively connecting the two ends of the cross area beam section with the cable-stayed area beam section and the suspension cable area beam section to form the cable-stayed suspension cable cooperation system bridge.
The beneficial effect that technical scheme that this application provided brought includes: according to the dividing conditions of the embodiment of the application, one section does not exceed four sections of the beam section of the intersection area, and two pairs of permanent suspenders are not needed for hoisting and supporting, so that the weight of the section is greatly reduced, the scale of the cable crane is reduced, the construction cost is reduced, and the phenomenon that the internal force of the permanent suspenders is too large in the construction process is avoided; and one section only needs to use a pair of permanent suspenders and a pair of temporary suspenders to hoist and support, so that one section is larger than one section of the beam section in the crossing area, the excessive use of the temporary suspenders is avoided, and the closure efficiency is improved.
The embodiment of the application provides a construction method of a cable-stayed suspension cable cooperation system bridge, and because the embodiment of the application divides the cross section of the cable-stayed suspension cable cooperation system bridge into a plurality of sections according to the preset dividing conditions, the preset dividing conditions are as follows: the number of the sections is equal to the number of pairs of permanent suspenders of the beam sections of the intersection area, and each section is provided with a first mounting position for mounting a pair of permanent suspenders, so that one section of the embodiment of the application does not exceed four sections of the beam sections of the intersection area, and two pairs of permanent suspenders are not needed for hoisting and supporting, thereby greatly reducing the weight of the sections, reducing the scale of the cable crane, reducing the construction cost and avoiding overlarge internal force of the permanent suspenders in the construction process; and one section only needs to use a pair of permanent suspenders and a pair of temporary suspenders to hoist and support, so that one section is larger than one section of the beam section in the crossing area, the excessive use of the temporary suspenders is avoided, and the closure efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a cable-stayed suspension cable cooperation system bridge provided in an embodiment of the present application;
fig. 2 is a schematic view of a construction state of a cable-stayed suspension cable cooperation system bridge according to an embodiment of the present application;
FIG. 3 is a view taken along line A-A of FIG. 2;
FIG. 4 is a schematic view of a segment according to an embodiment of the present disclosure;
fig. 5 is a locking structure of the locking structure provided in the embodiment of the present application;
fig. 6 is a sectional configuration view of a locking structure provided in an embodiment of the present application.
In the figure: 1. a cable-stayed zone beam section; 2. a span wire zone beam section; 3. hoisting ports; 4. a cross-zone beam section; 40. a segment; 41. a second mounting location; 42. internode; 5. a permanent hanger bar; 50. a first mounting location; 6. a temporary boom; 60. a first stage; 61. a second stage; 62. a third stage; 7. a locking structure; 70. locking and clamping; 71. a cable bearing groove; 72. a fixing clip; 8. a main cable; 9. a stay cable; 90. a third mounting location; 91. an anchor plate; 92. and (4) an anchoring structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1-3, an embodiment of the present application provides a construction method of a cable-stayed suspension cable cooperative system bridge, where the cable-stayed suspension cable cooperative system bridge includes a cable-stayed section 1, a suspension section 2, and a crossing section 4, the cable-stayed section 1 and the suspension section 2 are constructed first, after the construction is completed, a hoisting opening 3 is formed between the cable-stayed section 1 and the suspension section 2, and since a mid-span bridge structure is symmetrically arranged about a symmetric center line of a main beam, the installation of the crossing section 4 is also symmetric about the symmetric center line of the main beam, and hereinafter, only the construction of the crossing section 4 on the left side is described, and the installation method of the crossing section 4 on the right side is consistent with that on the left side. The construction method comprises the following steps:
s1: dividing a cross section beam section 4 of the cable-stayed suspension cable cooperation system bridge into a plurality of sections 40 according to preset dividing conditions, wherein a second installation position 41 for installing a pair of temporary suspenders 6 is reserved on each section 40; the preset dividing conditions are as follows: the number of segments 40 is equal to the number of pairs of permanent booms 5 of the cross-beam segment 4, and each segment 40 has a first mounting location 50 for mounting a pair of permanent booms 5;
s2: hoisting the segment 40 to the hoisting port 3 by using a cable crane, and connecting the segment 40 with the installed suspension cable zone beam segment 2;
s3: hoisting the permanent boom 5 and the temporary boom 6 on the first installation location 50 and the second installation location 41, respectively;
s4: and analogizing until all the segments 40 are hoisted to form a cross-area beam segment 4, wherein two ends of the cross-area beam segment 4 are respectively connected with the cable-stayed area beam segment 1 and the suspension cable area beam segment 2 to form the cable-stayed suspension cable cooperation system bridge.
The pair of permanent suspension bars 5 in the embodiment of the present application refers to two permanent suspension bars 5 symmetrically disposed along the transverse center line of the bridge, and the pair of temporary suspension bars 6 refers to two temporary suspension bars 6 symmetrically disposed along the transverse center line of the bridge. According to the dividing conditions of the embodiment of the application, one section 40 does not exceed four sections 42 of the beam section 4 in the intersection area, and two pairs of permanent suspenders 5 are not needed for hoisting and supporting, so that the weight of the section 40 is greatly reduced, the scale of the cable crane is reduced, the construction cost is reduced, and the overlarge internal force of the permanent suspenders 5 in the construction process is avoided; and one section 40 only needs to use one pair of permanent suspension rods 5 and one pair of temporary suspension rods 6 for hoisting support, so that one section is larger than one internode 42 of the beam section 4 at the intersection area, the excessive use of the temporary suspension rods 6 is avoided, and the closure efficiency is improved.
Optionally, the preset dividing condition further includes: a third mounting location 90 on each segment 40 containing a pair of stay cables 9; there is a gap or partial overlap between the third mounting location 90 and the second mounting location 41. The pair of stay cables 9 are two stay cables 9 symmetrically arranged along the transverse center line of the bridge.
Since the portion between the first installation position 50 and the third installation position 90 adjacent to each other on the cross-section beam segment 4 is a section 42 of the cross-section beam segment 4, each segment 40 includes a first installation position 50 and a third installation position 90, and in order to maintain the balance of hoisting, both ends of the segment 40 need to be provided with space for construction operation, so that one segment 40 is certainly larger than one section 42 and smaller than three sections 42. According to actual construction needs, the second installation position 41 is selected to be arranged at the third installation position 90 or spaced from the third installation position 90, so long as the temporary suspender 6 is conveniently installed and the permanent suspender 5 and the temporary suspender 6 are ensured to keep the segment 40 balanced when the segment 40 is hoisted.
Preferably, when the third mounting location 90 is fully coincident with the second mounting location 41; after hoisting all the segments 40, the method further comprises the following steps:
s5: removing all the temporary suspenders 6;
s6: the stay cables 9 are anchored at the second mounting location 41 to form the cross-sectional beam section 4.
The anchor plate 91 for anchoring the stay cable 9 is reserved on the segment 40 of the embodiment of the application, and because the anchor plate 91 is obliquely arranged, the anchor structure 92 is arranged on the anchor plate 91 for anchoring the temporary suspender 6, so that the temporary suspender 6 can be prevented from being directly connected with the segment 40 to damage the segment 40; after all the segments 40 have been hoisted, all the temporary booms 6 and the anchoring structures 92 are removed, and the stay cables 9 are anchored to the anchor plates 91 without damaging either the segments 40 or the anchor plates 91.
Referring to fig. 4, preferably, the length of segment 40 is the length of two internodes 42 of the beam segment 4 at the intersection.
Since the portion of the cross-sectional beam segment 4 between the first installation location 50 for installing the permanent suspension bar 5 and the third installation location 90 for installing the stay cable 9 is one joint 42 of the cross-sectional beam segment 4, and the length of the segment 40 of the embodiment of the present application is the length of two joints 42 of the cross-sectional beam segment 4, it is described that the segment 40 of the embodiment of the present application includes the portion between the first installation location 50 and the third installation location 90, and the first installation location 50 and the third installation location 90 extend out of the two ends by half of the joint 42 to form two joints 42; the symmetry of the permanent 5 and temporary 6 booms is ensured so that the balance of the segments 40 is maintained.
Further, in step S3, hoisting the temporary boom 6 at the second installation position 41 specifically includes the following steps:
s30: removably attaching the bottom end of the temporary boom 6 to the segment 40;
s31: the top end of the temporary suspender 6 is detachably connected with a main cable 8 of the cable-stayed suspension cable cooperation system bridge through a locking structure 7.
The bottom and the top of the temporary suspender 6 are respectively detachably connected with the segment 40 and the main cable 8, so that the temporary suspender 6 is detached after construction is completed, and the temporary suspender 6 is conveniently recycled.
Referring to fig. 5 and 6, further, the temporary suspension bar 6 is U-shaped, and the temporary suspension bar 6 includes a first section 60 and a second section 61 arranged vertically side by side, and an arc-shaped third section 62 connected between the first section 60 and the second section 61; and first section 60 and second section 61 are spaced apart on segment 40 along the transverse bridge; the locking structure 7 comprises a locking clamp 70 and a fixing clamp 72, the locking clamp 70 is matched with the main cable 8 and clamped on the main cable 8, and the locking clamp 70 is provided with cable bearing grooves 71 distributed along the circumferential direction; the third section 62 is wound in the cable bearing groove 71; the retaining clip 72 is clamped horizontally to the first and second segments 60, 61 and is used to tighten the lateral distance between the first and second segments 60, 61 so that the lateral distance between the first and second segments 60, 61 is equal to the lateral distance between the bottom ends of the first and second segments 60, 61.
The temporary suspension rod 6 is made of a high-strength steel wire rope, and the diameter of the locking clamp 70 is larger than the transverse distance between the bottom ends of the first section 60 and the second section 61, so that the top ends of the first section 60 and the second section 61 need to be tightened by the fixing clamp 72 for the stability of the temporary suspension rod 6, and the stability of the internal force of the beam end of the temporary suspension rod 6 is ensured.
Furthermore, the length of the reasonable temporary suspender 6 is determined by design, so that the linear shape of the beam section of the closure port suspension section is matched with that of the inclined-pulling section beam section 1, and the accurate closure of the beam section 4 at the intersection area is ensured. The closure opening is formed by a suspension section beam section and a diagonal-pulling section beam section 1, wherein the suspension section beam section and the diagonal-pulling section beam section are formed by the lifted section 40 and the suspension cable section beam section 2 before the last section 40 is not lifted.
The length of the temporary boom 6 is as follows:
L＝2×L0-2×(ΔL1+ΔL2+ΔL3)
in the above formula:
in the formula: l is the length of the temporary boom 6; t is the beam-end internal force of the first section 60 or the second section 61; e is the modulus of elasticity of the temporary suspension rod 6; gamma is the volume weight of the temporary suspender 6; a is the cross-sectional area of the temporary suspender 6; r is the sum of the radius of the cable bearing groove 71 and the radius of the cross section of the temporary suspender 6; h is1The vertical distance between the connection point between the first segment 60 and the segment 40 to the retaining clip 72; h is2The vertical distance between the circle center of the cable bearing groove 71 and the fixing clamp 72 is shown; d is the lateral distance between the bottom ends of the first and second sections 60, 61.
This application embodiment calculates the length that obtains interim jib 6 through above-mentioned computational formula to in using to actual construction, satisfy the closure condition with the beam-ends internal force of guaranteeing interim jib 6, make the closure mouth suspend section beam section linear and draw district's beam section 1 phase-match to one side, guarantee the accurate closure of crossing district's beam section 4.
Preferably, the construction method further includes S7: the step of acquiring the beam-end internal force of the first section 60.
Further, the step of obtaining the beam-end internal force of the first section 60 specifically includes:
s70: establishing a finite element model, and simulating the hoisting process of the beam section 4 in the cross area;
s71: when the closure opening meets the preset closure condition, acquiring the beam end internal force of the temporary suspender 6 in the finite element model; the preset closure conditions are as follows: the displacement difference and the rotation angle difference between the beam sections at the two ends of the closure opening meet a threshold value.
The embodiment of the application simulates the hoisting process of the beam section 4 in the intersection area in the finite element model, and adjusts the internal force of the beam end of the temporary suspender 6, so that the closure opening meets the preset closure condition, and when the closure opening meets the preset closure condition, the internal force of the beam end of the temporary suspender 6 in the finite element model, and the internal force of the beam end is taken as the internal force of the beam end of the U-shaped temporary suspender 6 in actual construction, and then the length of the temporary suspender 6 is obtained according to the formula, so that the stability of the internal force of the beam end of the temporary suspender 6 in the construction process is ensured, and the accurate closure of the beam section 4 in the intersection area is realized.
Optionally, after the beam segment 4 of the intersection zone is formed, the following steps are further included:
s8: and respectively connecting two ends of the cross area beam section 4 with the cable-stayed area beam section 1 and the suspension cable area beam section 2 to form the cable-stayed suspension cable cooperation system bridge.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A construction method of a cable-stayed suspension cable cooperation system bridge is characterized in that a hoisting opening (3) is formed between a cable-stayed zone beam section (1) and a suspension zone beam section (2) of the cable-stayed suspension cable cooperation system bridge, and the construction method comprises the following steps:
dividing a cross section beam section (4) of the cable-stayed suspension cable cooperation system bridge into a plurality of sections (40) according to a preset dividing condition, wherein a second installation position (41) for installing a pair of temporary suspension rods (6) is reserved on each section (40); the preset dividing conditions are as follows: the number of segments (40) being equal to the number of pairs of permanent booms (5) of the cross-sectional beam segments (4) and each segment (40) having a first mounting location (50) for mounting a pair of permanent booms (5);
hoisting the segment (40) to the hoisting opening (3);
hoisting a permanent boom (5) and a temporary boom (6) on the first installation location (50) and the second installation location (41), respectively;
and the like until all the segments (40) are hoisted to form the cross-section beam segment (4).
2. The construction method of a cable-stayed suspension cable cooperation system bridge according to claim 1, wherein the preset division condition further includes: -a third mounting location (90) on each of said segments (40) comprising a pair of stay cables (9); a gap or partial overlap exists between the third mounting location (90) and the second mounting location (41).
3. A method of constructing a cable-stayed bridge according to claim 2, wherein when the third installation location (90) is completely coincident with the second installation location (41); after hoisting all the segments (40), the method also comprises the following steps:
removing all temporary booms (6);
-anchoring the stay cables (9) in the second mounting location (41) to form the cross-sectional beam section (4).
4. A method of constructing a cable-stayed bridge according to claim 1, c h a r a c t e r i z e d in that the length of the segment (40) is the length of two internodes (42) of the cross-sectional beam section (4).
5. The construction method of a cable-stayed suspension cable cooperative system bridge according to claim 1, wherein the step of hoisting the temporary suspension rod (6) at the second installation position (41) comprises the following steps:
-detachably connecting the bottom end of the temporary boom (6) with the segment (40);
and the top end of the temporary suspender (6) is detachably connected with a main cable (8) of the cable-stayed suspension cable cooperation system bridge through a locking structure (7).
6. The construction method of the cable-stayed suspension cable cooperation system bridge as claimed in claim 5, wherein:
the temporary suspension rod (6) is U-shaped, and the temporary suspension rod (6) comprises a first section (60) and a second section (61) which are vertically arranged side by side, and an arc-shaped third section (62) connected between the first section (60) and the second section (61); and the first section (60) and the second section (61) are arranged on the segment (40) at intervals along the transverse bridge direction;
the locking structure (7) comprises:
the locking clamp (70) is matched with the main cable (8) and clamped on the main cable (8), and rope bearing grooves (71) distributed along the circumferential direction of the locking clamp (70) are formed in the locking clamp (70); the third section (62) is wound in the cable bearing groove (71);
-a retaining clip (72) horizontally clamped on the first (60) and second (61) sections and adapted to tighten the transverse distance between the first (60) and second (61) sections so that the transverse distance between the first (60) and second (61) sections is equal to the transverse distance between the bottom ends of the first (60) and second (61) sections.
7. The construction method of a cable-stayed suspension cable cooperative system bridge according to claim 6, wherein the length of the temporary suspension bar (6) is as follows:
L＝2×L0-2×(ΔL1+ΔL2+ΔL3)
in the above formula:
in the formula: l is the length of the temporary boom (6); t is the beam-end internal force of the first section (60) or the second section (61); e is the modulus of elasticity of the temporary suspension rod (6); gamma is the volume weight of the temporary suspender (6); a is the cross-sectional area of the temporary suspension rod (6); r is the sum of the radius of the cable bearing groove (71) and the cross-sectional radius of the temporary suspender (6); h is1Is the vertical distance between the connection point between the first segment (60) and the segment (40) to the retaining clip (72); h is2The vertical distance between the circle center of the cable bearing groove (71) and the fixing clamp (72) is defined; d is the lateral distance between the bottom ends of the first (60) and second (61) segments.
8. A method of constructing a cable-stayed bridge according to claim 7, characterized in that the method further comprises the step of taking the beam-end internal force of the first section (60).
9. The construction method of the cable-stayed suspension cable cooperation system bridge according to claim 8, wherein the step of acquiring the beam-end internal force of the first section (60) specifically comprises the steps of:
establishing a finite element model, and simulating the hoisting process of the beam section (4) in the cross area;
when the closure opening meets a preset closure condition, acquiring the beam end internal force of a temporary suspender (6) in the finite element model; the preset closure conditions are as follows: and the displacement difference and the rotation angle difference between the beam sections at the two ends of the closure opening meet a threshold value.
10. A method for constructing a cable-stayed suspension cable co-operating system bridge according to claim 1, characterized in that after the cross-sectional beam section (4) is formed, the method further comprises the steps of:
and respectively connecting two ends of the cross area beam section (4) with the cable-stayed area beam section (1) and the suspension area beam section (2) to form the cable-stayed suspension cooperation system bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110483809.4A CN113174863B (en) | 2021-04-30 | 2021-04-30 | Construction method of cable-stayed suspension cable cooperation system bridge |
Applications Claiming Priority (1)
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| CN101418543B (en) * | 2008-11-21 | 2013-08-28 | 上海市政工程设计研究总院 | Self-anchored rope-suspension bridge inclined drawing construction method |
| KR100969005B1 (en) * | 2009-11-06 | 2010-07-09 | 동아대학교 산학협력단 | Constructing method of suspension bridge and temporary cable therefor |
| KR101618787B1 (en) * | 2014-02-13 | 2016-05-09 | 김남희 | Hybrid cable structure system using radial hangers and earth-anchored cables and construction method thereof |
| CN105274941B (en) * | 2015-10-29 | 2017-04-12 | 中交第二航务工程局有限公司 | General construction method for partially ground-anchored cable-stayed suspension bridge |
| CN105421236B (en) * | 2015-10-29 | 2017-04-12 | 中交第二航务工程局有限公司 | Closing method for cable-stayed and suspension composite bridge |
| CN112144371A (en) * | 2020-09-30 | 2020-12-29 | 中铁大桥勘测设计院集团有限公司 | Cable-stayed suspension cable cooperation system bridge |
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