Method and device for positioning space special-shaped steel arch bridge inhaul cable
Technical Field
The invention relates to the technical field of bridge cable construction, in particular to a method and a device for positioning a space special-shaped steel arch bridge cable.
Background
The cable bridge has the advantages of strong spanning capability, high pressure bearing capability, attractive appearance and the like, and has become one of the preferred schemes for urban bridge construction along with the great improvement of the modernized comprehensive strength of our country and the requirements of urban economic development and urban three-dimensional landscape development.
The suspension cable is used as a link for connecting the arch rib and the main beam and is anchored on the steel anchor box of the arch rib and the anchor plate of the beam surface. When the axes of the arch rib steel anchor box and the beam surface anchor plate are inconsistent, the stress state of the sling can be changed, so that the local shearing force is applied to the part of the sling, and the service life of the sling is influenced. Therefore, the whole stress system formation of the bridge is directly influenced by the accurate positioning construction of the suspension cables and the beam surface anchor plates.
Therefore, a technical scheme is needed at present to solve the technical problems that in the construction process of the sling, the sling is partially sheared due to the fact that the axes of the arch rib steel anchor box and the beam surface anchor plate are inconsistent, the service life of the sling is affected, and the structural stability of the bridge is affected.
Disclosure of Invention
The invention aims to: aiming at the technical problems that in the construction process of a sling, the sling is partially sheared due to the fact that the axes of an arch rib steel anchor box and a beam surface anchor plate are inconsistent, the service life of the sling is influenced, and the structural stability of a bridge is influenced, a positioning method and a positioning device for a space special-shaped steel arch bridge inhaul cable are provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for positioning a space special-shaped steel arch bridge inhaul cable comprises the following steps:
s1, fixing a traction rope at the circle center of a sling mounting hole on the steel anchor box;
s2, stretching a traction rope into the arch rib guide rope pipe along the upper end of the arch rib guide rope pipe, stretching the traction rope into the anchor pulling plate guide rope pipe to be connected with a hanging ring on the anchor pulling plate, and adjusting the traction rope to enable the traction rope to be in a stretched straight state;
s3, measuring the distance between the traction rope and the inner wall of the anchor plate cable guide pipe at the position of the anchor plate cable guide pipe orifice, and correspondingly adjusting the position of the anchor plate to enable the traction rope to be positioned on the center line of the anchor plate cable guide pipe;
and S4, welding and fixing the anchor plate and the beam surface, and removing the traction rope.
The invention relates to a method for positioning a spatial special-shaped steel arch bridge inhaul cable, which is characterized in that one end of a traction rope is fixed at the circle center position of a sling installation hole on a steel anchor box, the other end of the traction rope is connected with a hanging ring for installing the sling on an anchor pull plate, the position of the anchor pull plate is correspondingly adjusted by measuring the distance from the traction rope to the inner wall of an anchor pull plate cable guide pipe, so that the traction rope is positioned on the center line of the anchor pull plate cable guide pipe, the axis alignment of the anchor pull plate cable guide pipe and an arch rib cable guide pipe is realized, and the installation accuracy of the sling in the arch rib cable guide pipe and the anchor pull plate cable guide pipe is further improved.
As a preferable embodiment of the present invention, in the step S1, a bracket is manufactured, the pulling rope is connected to the bracket, and the pulling rope is fixed at the center of the sling installation hole through the bracket. The support is arranged on the steel anchor box, so that the traction rope is arranged at the circle center of a sling mounting hole of the steel anchor box, the support is convenient to fix with the steel anchor box, and the support can be fixed on the steel anchor box by adopting a steel wire binding or bolt fastening mode.
As a preferable scheme of the invention, the support is in a cross shape, and the traction rope is fixed at the center of the support. The center of the cross-shaped support is conveniently used as a reference to be aligned with the circle center of the sling mounting hole on the steel anchor box, so that the positioning of the traction rope is more accurate.
As the preferable scheme of the invention, the center of the bracket is provided with a hanging buckle. Make the haulage rope can be on hanging to detain and carry out the ligature, in the taut in-process of follow-up construction haulage rope, because the haulage rope with hang to detain and be connected, the haulage rope itself can not appear offset on the support because of the atress, has ensured that the location of haulage rope is accurate.
According to the preferable scheme of the invention, two auxiliary lines which are perpendicular to each other are drawn on the steel anchor box along the diameter direction of the sling installation hole, and the cross-shaped bracket is overlapped with the auxiliary lines and installed. The diameter of a sling mounting hole is found out by a steel ruler, the maximum chord length is taken as the diameter direction, a first auxiliary line is drawn on a steel anchor box along the steel ruler, then the position of the maximum chord length of the sling mounting hole is found out along the direction perpendicular to the first auxiliary line, a second auxiliary line is drawn on the steel anchor box along the steel ruler, the intersection point position of the two auxiliary lines is the circle center position of the sling mounting hole, then a cross-shaped support is superposed with the two auxiliary lines, the center of the cross-shaped support can be superposed with the circle center of the sling mounting hole, and a traction rope is fixed at the circle center position of the sling mounting hole.
As a preferable scheme of the invention, the hauling cable is a steel wire rope. The steel wire rope is not easy to deform and break in the process of straightening, and the stability of the positioning process is improved.
In a preferred embodiment of the present invention, the pulling rope is provided with a turn buckle, and in step S2, the pulling rope is straightened by adjusting the turn buckle. The usable lead screw of turn buckle is flexible, can adjust wire rope's elasticity to make the effect of straightening of haulage rope better, and then promote the positioning accuracy of anchor arm-tie board.
In a preferred embodiment of the present invention, in step S3, the distance between the hauling cable and the inner wall of the anchor plate cable guide tube is measured in at least three directions, and the distance between the hauling cable and the inner wall of the anchor plate cable guide tube is made to be the same by swinging the anchor plate. The distances from at least three directions of the traction rope to the inner wall of the anchor plate are measured, so that the contact ratio of the traction rope after the distance adjustment and the center line of the guide cable pipe of the anchor plate is higher, namely the contact ratio of the guide cable pipe of the anchor plate after the adjustment of the anchor plate and the center line of the guide cable pipe of the arch rib is higher, and the accurate installation of the guide cable is further ensured.
As a preferable aspect of the present invention, in step S3, the position of the anchor plate is adjusted by a jack, and the anchor plate is temporarily supported by using a steel bar after the adjustment is completed. The jack can realize the small-amplitude swing of anchor plate to carry out the position fine setting of anchor plate, adjust and accomplish and use the shaped steel to support anchor plate, be convenient for weld anchor plate and roof beam face in the follow-up construction.
The utility model provides a space dysmorphism steel arched bridge cable positioner, includes cross support, support center department even has wire rope, the last basket of flowers bolt that is equipped with of wire rope.
According to the positioning device for the spatial special-shaped steel arch bridge inhaul cable, the steel wire rope can be accurately fixed at the circle center position of the sling installation hole in the steel anchor box through the cross-shaped support, the other end of the steel wire rope is connected with the hanging ring for installing the sling on the anchor pull plate, the position of the anchor pull plate is correspondingly adjusted by measuring the distance from the traction rope to the inner wall of the anchor pull plate cable guide pipe, so that the traction rope is positioned on the center line of the anchor pull plate cable guide pipe, the axis alignment of the anchor pull plate cable guide pipe and the arch rib cable guide pipe is realized, and the installation accuracy of the sling in the arch rib cable guide pipe and the anchor pull plate cable guide pipe is further improved.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. before the sling is installed, the anchor plate on the beam surface is accurately positioned through the traction rope, so that the axes of the anchor plate guide cable pipe and the arch rib guide cable pipe are aligned, and the installation accuracy of the sling in the arch rib guide cable pipe and the anchor plate guide cable pipe is improved;
2. the anchor plate is pre-positioned by the traction rope, so that a complex alignment procedure in the subsequent sling installation process is omitted, the weight of the traction rope is light, the operation is more convenient, and the installation efficiency of the sling is improved;
3. the construction method has the advantages that the operation process is simple, the construction time is effectively shortened, the arch rib and the beam body structure can form a stress system as soon as possible, and the structural safety of the bridge is ensured.
Drawings
FIG. 1 is a schematic construction diagram of an arch rib in the method for positioning the guy cable of a spatial special-shaped steel arch bridge according to the invention;
FIG. 2 is a schematic construction view of a spatial special-shaped steel arch bridge stay cable positioning method on a beam surface;
FIG. 3 is a schematic structural diagram of a spatial special-shaped steel arch bridge inhaul cable positioning device of the invention;
the labels in the figure are: 1-arch rib, 2-beam surface, 3-steel anchor box, 31-sling mounting hole, 4-anchor plate, 5-arch rib guide cable pipe, 6-anchor plate guide cable pipe, 7-traction rope, 8-bracket, 81-hanging buckle and 9-turnbuckle.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1, fig. 2 and fig. 3, the method for positioning the guy cable of the spatial special-shaped steel arch bridge of the present embodiment includes the following steps:
s1, fixing a traction rope 7 at the circle center of the sling mounting hole 31 on the steel anchor box 3;
s2, stretching the traction rope 7 into the arch rib guide rope tube 5 along the upper end of the arch rib guide rope tube, stretching the traction rope 7 into the anchor pulling plate guide rope tube 6 to be connected with the hanging ring 41 on the anchor pulling plate 4, enabling the traction rope 7 to be in a stretched straight state, and adjusting the traction rope 7 to enable the traction rope 7 to be in the stretched straight state;
s3, measuring the distance between the traction rope 7 and the inner wall of the anchor plate cable guide tube 6 at the position of the orifice of the anchor plate cable guide tube 6, and correspondingly adjusting the position of the anchor plate 4 to ensure that the traction rope 7 is positioned on the central line of the anchor plate cable guide tube 6;
and S4, welding and fixing the anchor plate 4 and the beam surface 2, and removing the traction rope 7 and the bracket 8.
The invention relates to a method for positioning a spatial special-shaped steel arch bridge inhaul cable, wherein one end of a traction rope 7 is fixed at the circle center position of a sling installation hole 31 on a steel anchor box 3 on an arch rib 1, the other end of the traction rope 7 extends to a beam surface 2 to be connected with a hanging ring 41 used for installing the sling on an anchor pull plate 4, the position of the anchor pull plate 4 is correspondingly adjusted by measuring the distance between the traction rope 7 and the inner wall of an anchor pull plate guide cable pipe 6, so that the traction rope 7 is positioned on the central line of the anchor pull plate guide cable pipe 6, the axis alignment of the anchor pull plate guide cable pipe 6 and the arch rib guide cable pipe 5 is realized, and the installation accuracy of the sling in the arch rib guide cable pipe 5 and the anchor pull plate guide cable pipe 6 is further improved.
Specifically, in step S1, the bracket 8 is manufactured, the hauling cable 7 is connected to the bracket 8, the hauling cable 7 is fixed to the center of the sling mounting hole 31 by the bracket 8, the bracket 8 is mounted on the steel anchor box 3, the hauling cable 7 is mounted to the center of the sling mounting hole 31 of the steel anchor box 3, the bracket 8 is convenient to fix to the steel anchor box 3, and the bracket 8 can be fixed to the steel anchor box 3 by steel wire binding or bolt fastening.
Specifically, the traction rope 7 is a steel wire rope, the steel wire rope is not easy to deform and break in the process of straightening, and the stability in the positioning process is improved; further, be equipped with turn buckle 9 on the haulage rope 7 in step S2, through adjusting turn buckle 9, make haulage rope 7 be in the state of stretching tightly, turn buckle 9 usable lead screw is flexible, can adjust wire rope' S elasticity to make haulage rope 7 stretch tightly directly the effect better, and then promote the positioning accuracy of anchor plate 4.
Specifically, in step S3, the distance between the pulling rope 7 and the inner wall of the anchor plate cable guiding tube 6 is measured at least along three directions, and the distance between the pulling rope 7 and the inner wall of the anchor plate cable guiding tube 6 is the same by swinging the anchor plate 4, and in this step, the distance between the pulling rope 7 and the inner wall of the anchor plate cable guiding tube 6 is measured at least along three directions, so that the coincidence degree between the pulling rope 7 adjusted by the distance and the center line of the anchor plate cable guiding tube 6 is higher, that is, the coincidence degree between the anchor plate cable guiding tube 6 and the center line of the arch rib cable guiding tube 5 is higher after the anchor plate 4 is adjusted, thereby ensuring the accurate installation of the cable guiding tube; more specifically, in step S3, the position of the anchor plate 4 is adjusted by a jack, the anchor plate 4 is temporarily supported by the use of the tool steel after the adjustment is completed, the jack can swing the anchor plate 4 by a small amount, so that the position of the anchor plate 4 is finely adjusted, the tool steel is used to support the anchor plate 4 after the adjustment is completed, and the anchor plate 4 is welded to the beam surface 2 in the subsequent construction.
Example 2
As shown in fig. 1 and 3, the difference between this embodiment and embodiment 1 is that the support 8 is cross-shaped, and the hauling cable 7 is fixed to the center of the support 8, so that the center of the cross-shaped support 8 is used as a reference to align with the center of the sling mounting hole 31 on the steel anchor box 3, thereby positioning the hauling cable 7 more accurately.
Preferably, the center of the support 8 is provided with a hanging buckle 81, so that the traction rope 7 can be bound on the hanging buckle 81, and in the tensioning process of the traction rope 7 in subsequent construction, because the traction rope 7 is connected with the hanging buckle 81, the traction rope 7 can not generate position deviation on the support 8 due to stress, and the accurate positioning of the traction rope 7 is ensured.
Preferably, two auxiliary lines which are perpendicular to each other are drawn on the steel anchor box 3 along the diameter direction of the sling mounting hole 31, the cross-shaped support 8 and the auxiliary lines are installed in a superposition mode, specifically, the diameter of the sling mounting hole 31 is found out through a steel ruler, the maximum chord length is taken as the diameter direction, a first auxiliary line is drawn on the steel anchor box 3 along the steel ruler, then the position of the maximum chord length of the sling mounting hole 31 is found out along the direction perpendicular to the first auxiliary line, a second auxiliary line is drawn on the steel anchor box 3 along the steel ruler, the intersection point position of the two auxiliary lines is the circle center position of the sling mounting hole 31, then the cross-shaped support 8 and the two auxiliary lines are superposed, the center of the cross-shaped support 8 can be superposed with the circle center of the sling mounting hole 31, and the traction rope 7 can be fixed at the circle center position of the sling mounting hole 31.
Example 3
As shown in fig. 1, fig. 2 and fig. 3, this embodiment provides a device for positioning a space special-shaped steel arch bridge guy cable, such as the device used in the method for positioning a space special-shaped steel arch bridge guy cable described in embodiment 2, which includes a cross-shaped bracket 8, wherein a steel wire rope is connected to the center of the bracket 8, and a basket bolt 9 is arranged on the steel wire rope.
According to the positioning device for the spatial special-shaped steel arch bridge inhaul cable, the steel wire rope can be accurately fixed at the circle center position of the sling installation hole 31 on the steel anchor box 3 through the cross-shaped support 8, the other end of the steel wire rope is connected with the hanging ring 41 used for installing the sling on the anchor pull plate 4, the position of the anchor pull plate 4 is correspondingly adjusted by measuring the distance between the traction rope 7 and the inner wall of the anchor pull plate guide cable pipe 6, the traction rope 7 is positioned on the central line of the anchor pull plate guide cable pipe 6, the axis alignment of the anchor pull plate guide cable pipe 6 and the arch rib guide cable pipe 5 is realized, and the installation accuracy of the sling in the arch rib guide cable pipe 5 and the anchor pull plate guide cable pipe 6 is further improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.