CN113605251B - Arch bridge cable adjusting method - Google Patents
Arch bridge cable adjusting method Download PDFInfo
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- CN113605251B CN113605251B CN202111085871.4A CN202111085871A CN113605251B CN 113605251 B CN113605251 B CN 113605251B CN 202111085871 A CN202111085871 A CN 202111085871A CN 113605251 B CN113605251 B CN 113605251B
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses an arch bridge cable adjusting method, which discloses a base point for determining the height of a bridge deck, wherein a Beidou GNSS displacement measuring system at the position of the base point is fixedly installed at the base point; an arch rib displacement Beidou GNSS measurement system and a bridge deck displacement Beidou GNSS measurement system are respectively arranged at the upper end and the lower end of two slings to be cable-adjusted on the arch rib and the bridge deck, and the Beidou GNSS displacement measurement system at the fixed position is arranged at the bottom end of the sling adjacent to the bridge deck displacement Beidou GNSS displacement measurement system; the arch bridge cable adjusting method disclosed by the invention carries out construction cable adjustment by using the principle that bridge deck elevation control is taken as a main principle and sling internal force control is taken as an auxiliary principle through a base point position arch rib displacement Beidou GNSS displacement measurement system and a bridge deck displacement Beidou GNSS displacement measurement system in real time, and can ensure that the cable force of a bridge reaches a design required value and simultaneously meet the construction requirements of integral synchronous tensioning and synchronous cable adjustment of sling of a sling arch bridge.
Description
Technical Field
The invention relates to the field of cable adjustment of arch bridges, in particular to a cable adjustment method of an arch bridge.
Background
With the development of transportation, the construction number of the sling arch bridge is continuously increased, after the arch bridge is constructed, the sling transmits load borne by a beam part to the tied arch rib at the upper end and then transmits the load to the four-corner arch base through the arch rib, and although the installation and tensioning process of the sling is basically the last step of a full bridge, the step is related to the service life and the safety of the sling bridge.
The traditional suspension cable installation and tensioning processes are all manually operated handle type oil pumps are adopted to drive a jack, and the suspension cable is tensioned one by one. The traditional tensioning buckle hanging load-adjusting method has the advantages that the construction efficiency is low, the reading of an oil pressure gauge swinging by an oil pump pointer is easy to make mistakes, the response is not timely, and the construction mode cannot ensure that the bridge cable force reaches the design required value.
Disclosure of Invention
The invention aims to provide an arch bridge cable adjusting method to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides an arch bridge cable adjusting method, which comprises the following steps:
determining a base point of the height of the bridge floor, setting a base point at any end of the bridge floor, and fixedly installing a Beidou GNSS displacement measurement system at the base point;
determining two suspension cables to be adjusted, wherein arch rib and bridge deck are respectively provided with an arch rib displacement Beidou GNSS displacement measuring system and a bridge deck displacement Beidou GNSS displacement measuring system at the upper end and the lower end of the two suspension cables to be adjusted, and the bottom ends of the suspension cables adjacent to the bridge deck displacement Beidou GNSS displacement measuring system are provided with a set-position Beidou GNSS displacement measuring system;
connecting a tensioning system for drawing the slings above the two slings to be adjusted, wherein the tensioning system is fixedly connected with the arch rib;
the tensioning system works to drive the two suspension cables of the cable to be adjusted to ascend, the arch rib elevations and the suspension cable beam elevations of the suspension cables are measured in real time through the base point position Beidou GNSS displacement measuring system, the arch rib displacement Beidou GNSS displacement measuring system and the bridge deck displacement Beidou GNSS displacement measuring system, and whether the cable adjustment of the two suspension cables of the cable to be adjusted is completed or not is judged by combining the suspension cable force of the tensioning system;
and step five, determining two suspension cables of the next group of cables to be adjusted, and executing the steps two to four until all the suspension cables are adjusted.
Preferably, the arch bridge comprises arch ribs, a bridge deck and a plurality of suspension cables arranged between the arch ribs and the bridge deck, wherein two rows of the suspension cables are arranged in parallel; two suspension cables of the cable to be adjusted are symmetrically arranged on two sides of the bridge floor.
Preferably, the tensioning system comprises a jack arranged above the sling to be adjusted, and the jack is communicated with an oil pump; the lifting jack is connected with a tension sensor, and data measured by the tension sensor is the sling force required by the sling.
Preferably, the arch rib displacement Beidou GNSS displacement measurement system comprises a third displacement Beidou GNSS displacement measurement system and a sixth displacement Beidou GNSS displacement measurement system, and the third displacement Beidou GNSS displacement measurement system and the sixth displacement Beidou GNSS displacement measurement system are respectively and fixedly arranged at the connecting part of the arch rib and two slings to be cabled; bridge floor displacement big dipper GNSS displacement measurement system includes second displacement big dipper GNSS displacement measurement system and fifth displacement big dipper GNSS displacement measurement system, the position big dipper GNSS displacement measurement system of having fixed includes first displacement big dipper GNSS displacement measurement system and fourth displacement big dipper GNSS displacement measurement system, first displacement big dipper GNSS displacement measurement system, second displacement big dipper GNSS displacement measurement system, fourth displacement big dipper GNSS displacement measurement system, fifth displacement big dipper GNSS displacement measurement system all fix the fixed department that sets up at bridge floor and hoist cable, and first displacement big dipper GNSS displacement measurement system and fourth displacement measurement set up on treating the hoist cable that has adjusted the cable that the hoist cable is adjacent.
Preferably, the position of the base point position Beidou GNSS displacement measurement system in the first step is set as an original point, the data measured by the first displacement Beidou GNSS displacement measurement system, the second displacement Beidou GNSS displacement measurement system, the third displacement Beidou GNSS displacement measurement system, the fourth displacement Beidou GNSS displacement measurement system, the fifth displacement Beidou GNSS displacement measurement system and the sixth displacement Beidou GNSS displacement measurement system are position differences relative to the base point position Beidou GNSS displacement measurement system, the data measured by the displacement Beidou GNSS displacement measurement system comprises three groups of data of transverse displacement, longitudinal displacement and vertical displacement, the sling displacement completed by cable deployment is measured by the first displacement Beidou GNSS displacement measurement system and the fourth displacement Beidou GNSS displacement measurement system, the sling beam elevation of the sling to be deployed is measured by the second displacement Beidou GNSS displacement measurement system and the fifth displacement Beidou GNSS displacement measurement system, and the sling rib elevation of the sling to be deployed is measured by the third displacement Beidou GNSS displacement measurement system and the sixth displacement GNSS displacement measurement system.
Preferably, the base point position Beidou GNSS displacement measurement system, the first displacement Beidou GNSS displacement measurement system, the second displacement Beidou GNSS displacement measurement system, the third displacement Beidou GNSS displacement measurement system, the fourth displacement Beidou GNSS displacement measurement system, the fifth displacement Beidou GNSS displacement measurement system and the sixth displacement Beidou GNSS displacement measurement system form a Beidou displacement measurement system.
The invention discloses the following technical effects: the invention measures the elevation of the arch rib of the sling and the elevation of the sling beam in real time through a base point position Beidou GNSS displacement measurement system, an arch rib displacement Beidou GNSS displacement measurement system and a bridge floor displacement Beidou GNSS displacement measurement system, and judges whether the sling meets the requirement of cable adjustment or not by combining the sling force of a tensioning system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of an arch bridge structure according to the present invention;
wherein, 1 is the arch rib, 2 is the bridge floor, and 3 is the hoist cable, and 4 are stretch-draw system, 10 are base point position big dipper GNSS displacement measurement system, and 11 are arch rib displacement big dipper GNSS displacement measurement system, and 12 are bridge floor displacement big dipper GNSS displacement measurement system, and 13 are the position big dipper GNSS displacement measurement system that has been fixed.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
Referring to fig. 1, the arch bridge of the invention comprises arch ribs 1, a bridge deck 2 and a plurality of slings 3 arranged between the arch ribs 1 and the bridge deck 2, wherein two rows of the slings 3 are arranged in parallel; two suspension cables 3 of the cable to be adjusted are symmetrically arranged at two sides of the bridge deck 2.
The invention provides an arch bridge cable adjusting method, which comprises the following steps:
determining a base point of the height of the bridge deck 2, setting a base point at any end of the bridge deck 2, and fixedly installing a Beidou GNSS displacement measurement system 10 at the position of the base point;
determining two suspension cables 3 to be cabled, respectively installing an arch rib displacement Beidou GNSS displacement measuring system 11 and a bridge deck displacement Beidou GNSS displacement measuring system 12 at the upper end and the lower end of each of the two suspension cables 3 to be cabled, and installing a set position Beidou GNSS displacement measuring system 13 at the bottom end of each suspension cable 3 adjacent to the bridge deck displacement Beidou GNSS displacement measuring system 12 by using the arch ribs 1 and the bridge deck 2;
thirdly, a tensioning system 4 for drawing the slings 3 is connected above the two slings 3 to be adjusted, and the tensioning system 4 is fixedly connected with the arch rib 1; the tensioning system 4 comprises a jack arranged above the sling 3 to be adjusted, and the jack is communicated with an oil pump; the jack is connected with a tension sensor, and data measured by the tension sensor is the sling force required by the sling 3.
The tensioning system 4 works to drive the two suspension cables 3 to be subjected to cable adjustment to rise, the heights of the suspension cable arch ribs and the heights of the suspension cable beams are measured in real time through the base point position Beidou GNSS displacement measurement system 10, the arch rib displacement Beidou GNSS displacement measurement system 11 and the bridge deck displacement Beidou GNSS displacement measurement system 12, and whether cable adjustment of the two suspension cables 3 to be subjected to cable adjustment is completed or not is judged by combining the suspension cable force of the tensioning system 4; and the Beidou GNSS displacement measurement system 13 which is already set is used as reference data to be compared with the data of the bridge deck displacement Beidou GNSS displacement measurement system 12 below the two slings 3 to be cabled, so that the accuracy of the slings is ensured. The invention measures the elevation of the arch rib of the sling and the elevation of the sling beam in real time through a base point position Beidou GNSS displacement measurement system, an arch rib displacement Beidou GNSS displacement measurement system and a bridge floor displacement Beidou GNSS displacement measurement system, and judges whether the sling meets the requirement of cable adjustment or not by combining the sling force of a tensioning system.
And step five, determining two slings 3 of the next group of slings to be adjusted, and executing the steps two to four until all the slings 3 are adjusted.
The arch rib displacement Beidou GNSS displacement measurement system 11 comprises a third displacement Beidou GNSS displacement measurement system and a sixth displacement Beidou GNSS displacement measurement system, and the third displacement Beidou GNSS displacement measurement system and the sixth displacement Beidou GNSS displacement measurement system are respectively and fixedly arranged at the connecting part of the arch rib 1 and the two slings 3 to be cabled; bridge floor displacement big dipper GNSS displacement measurement system 12 includes second displacement big dipper GNSS displacement measurement system and fifth displacement big dipper GNSS displacement measurement system, the position big dipper GNSS displacement measurement system 13 includes first displacement big dipper GNSS displacement measurement system and fourth displacement big dipper GNSS displacement measurement system, first displacement big dipper GNSS displacement measurement system, second displacement big dipper GNSS displacement measurement system, fourth displacement big dipper GNSS displacement measurement system, fifth displacement big dipper GNSS displacement measurement system all fixes the fixed department that sets up at bridge floor 2 and hoist cable 3, first displacement big dipper GNSS displacement measurement system and fourth displacement measurement set up on treating the hoist cable 3 of having cable of adjusting that cable 3 is adjacent. The Beidou GNSS displacement measuring system with the base point position comprises a Beidou GNSS displacement measuring system 10, a first displacement Beidou GNSS displacement measuring system, a second displacement Beidou GNSS displacement measuring system, a third displacement Beidou GNSS displacement measuring system, a fourth displacement Beidou GNSS displacement measuring system, a fifth displacement Beidou GNSS displacement measuring system and a sixth displacement Beidou GNSS displacement measuring system, the Beidou GNSS displacement measuring system is accurate in positioning, and accuracy of measuring the heights of the arch ribs and the lifting cable beams of the lifting cable in real time is improved.
Setting the position of the base point position Beidou GNSS displacement measuring system 10 in the first step as an origin, wherein data measured by the first displacement Beidou GNSS displacement measuring system, the second displacement Beidou GNSS displacement measuring system, the third displacement Beidou GNSS displacement measuring system, the fourth displacement Beidou GNSS displacement measuring system, the fifth displacement Beidou GNSS displacement measuring system and the sixth displacement Beidou GNSS displacement measuring system are position differences relative to the base point position Beidou GNSS displacement measuring system 10, data measured by the displacement Beidou GNSS displacement measuring systems comprise three groups of data of transverse displacement, longitudinal displacement and vertical displacement, sling 3 displacement which is completed by cable adjustment is measured by the first displacement Beidou GNSS displacement measuring system and the fourth displacement Beidou GNSS displacement measuring system, sling height of a sling beam of a sling 3 to be adjusted is measured by the second displacement Beidou GNSS displacement measuring system and the fifth displacement Beidou GNSS displacement measuring system, and the third displacement Beidou GNSS displacement measuring system and the sixth displacement measuring system measure sling rib elevations of the sling 3 to be adjusted.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (3)
1. An arch bridge cable adjusting method is characterized in that: the arch bridge comprises arch ribs, a bridge deck and a plurality of suspension cables arranged between the arch ribs and the bridge deck, wherein two rows of the suspension cables are arranged in parallel; two suspension cables of the cable to be adjusted are symmetrically arranged on two sides of the bridge floor; an arch bridge cable adjusting method comprises the following steps:
determining a base point of the height of the bridge floor, setting a base point at any end of the bridge floor, and fixedly installing a Beidou GNSS displacement measurement system at the base point;
determining two suspension cables to be adjusted, respectively mounting an arch rib displacement Beidou GNSS (global navigation satellite system) measuring system and a bridge deck displacement Beidou GNSS measuring system at the upper end and the lower end of each of the two suspension cables to be adjusted on the arch rib and the bridge deck, and mounting a set position Beidou GNSS displacement measuring system at the bottom end of each suspension cable adjacent to the bridge deck displacement Beidou GNSS measuring system;
connecting a tensioning system for drawing the slings above the two slings to be adjusted, wherein the tensioning system is fixedly connected with the arch rib;
the tensioning system works to drive the two suspension cables to be adjusted to ascend, the arch rib elevations and the suspension cable beam elevations of the suspension cables are measured in real time through the base point position Beidou GNSS displacement measuring system, the arch rib displacement Beidou GNSS measuring system and the bridge deck displacement Beidou GNSS measuring system, and whether the two suspension cables to be adjusted are adjusted or not is judged by combining the suspension cable force of the tensioning system;
determining two suspension cables of the next group of suspension cables to be adjusted, and executing the steps from two to four until all the suspension cables are adjusted;
the arch rib displacement Beidou GNSS displacement measuring system comprises a third displacement Beidou GNSS displacement measuring system and a sixth displacement Beidou GNSS displacement measuring system, and the third displacement Beidou GNSS displacement measuring system and the sixth displacement Beidou GNSS displacement measuring system are respectively and fixedly arranged at the connecting positions of the arch rib and the two slings of the cable to be adjusted; the bridge deck displacement Beidou GNSS displacement measuring system comprises a second displacement Beidou GNSS displacement measuring system and a fifth displacement Beidou GNSS displacement measuring system, the positioned Beidou GNSS displacement measuring system comprises a first displacement Beidou GNSS displacement measuring system and a fourth displacement Beidou GNSS displacement measuring system, the first displacement Beidou GNSS displacement measuring system, the second displacement Beidou GNSS displacement measuring system, the fourth displacement Beidou GNSS displacement measuring system and the fifth displacement GNSS displacement measuring system are all fixedly arranged at the fixed positions of the bridge deck and the sling, and the first displacement Beidou GNSS displacement measuring system and the fourth displacement measuring system are arranged on the sling of the cable to be adjusted adjacent to the sling;
setting the position of the base point position Beidou GNSS displacement measurement system in the first step as an origin, wherein data measured by the first displacement Beidou GNSS displacement measurement system, the second displacement Beidou GNSS displacement measurement system, the third displacement Beidou GNSS displacement measurement system, the fourth displacement Beidou GNSS displacement measurement system, the fifth displacement Beidou GNSS displacement measurement system and the sixth displacement Beidou GNSS displacement measurement system are position differences relative to the base point position Beidou GNSS displacement measurement system, data measured by the displacement Beidou GNSS displacement measurement system comprise three groups of data including transverse displacement, longitudinal displacement and vertical displacement, sling displacement completed by cable adjustment is measured by the first displacement Beidou GNSS displacement measurement system and the fourth displacement Beidou GNSS displacement measurement system, the second displacement Beidou GNSS displacement measurement system and the fifth displacement GNSS displacement measurement system measure the height of a sling beam of a sling to be adjusted, and the third displacement Beidou GNSS displacement measurement system and the sixth displacement measurement system measure the height of an arch rib of the sling to be adjusted.
2. The arch bridge cable adjusting method according to claim 1, wherein: the tensioning system comprises a jack arranged above a sling of the cable to be adjusted, and the jack is communicated with an oil pump; the lifting jack is connected with a tension sensor, and data measured by the tension sensor is the sling force required by the sling.
3. The arch bridge cable adjusting method according to claim 1, wherein: the Beidou displacement measurement system is composed of a base point position Beidou GNSS displacement measurement system, a first displacement Beidou GNSS displacement measurement system, a second displacement Beidou GNSS displacement measurement system, a third displacement Beidou GNSS displacement measurement system, a fourth displacement Beidou GNSS displacement measurement system, a fifth displacement Beidou GNSS displacement measurement system and a sixth displacement Beidou GNSS displacement measurement system.
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| CN202111085871.4A CN113605251B (en) | 2021-09-16 | 2021-09-16 | Arch bridge cable adjusting method |
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| CN202111085871.4A CN113605251B (en) | 2021-09-16 | 2021-09-16 | Arch bridge cable adjusting method |
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| CN113605251B true CN113605251B (en) | 2022-11-29 |
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