Construction monitoring method for exchanging course of half/through arch bridge suspender

A construction monitoring and boom technology, applied in bridges, bridge maintenance, bridge reinforcement, etc., can solve the problems of rare and insufficient booms, and achieve the effect of strengthening the identification of structural parameters, small temperature error, and stable performance.

Inactive Publication Date: 2007-08-15
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing examples show that the effective life of the suspenders is generally only 3-16 years, which is much lower than the 100-year design basis of the bridge, which means that the replacement of the arch bridge suspenders is unavoidable
However, there are few examples of the replacement of suspenders at present, and the experience of the design and construction units for the replacement of arch bridge suspenders shows a serious shortage. The construction monitoring method is particularly important

Method used

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  • Construction monitoring method for exchanging course of half/through arch bridge suspender
  • Construction monitoring method for exchanging course of half/through arch bridge suspender

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The layout of an arch bridge is shown in Figure 1. The calculated span is 71.6 meters, and the height loss is 14.32 meters. sidewalk), navigation requires 300 tons. Design load: steam-20, hanging-100, crowd load 4KN / m2.

[0043]The construction monitoring method in the arch bridge suspender replacement process, the steps are as follows:

[0044] 1. Establish a spatial reference finite element model for calculation and analysis. Figure 2 shows the established spatial finite element model. In the model, arch ribs, transverse beams, and tie beams are set as beam elements, and suspenders are set as truss elements. Among them, there are 129 beam units and 34 truss units.

[0045] 2. Monitoring means

[0046] A. Three-dimensional monitoring, monitoring point layout, as shown in Figure 3.

[0047] ① Arrangement of control points: A control point is arranged on both sides of the bridge and on both sides of the canal. The control points form a quadrilateral shape of the ear...

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Abstract

The invention relates to a construction detection used in the hanger rod exchange of middle and lower arc bridges. The invention comprises that building arc bridge spatial reference limit model, analyzing the force state of bridge, simulating the whole construction, the construction uses arc bridge three-dimension position detection, bridge sink detection, displacement detection between arc rib and beam, hanger rod force detection, structural stress detection and long-time detection, then comparing the data of detection with the reference limit model, to correct the model, to be used in next reference limit model. The invention can confirm the flexibility less than theory value and confirm the hang force in design range, to improve safety or the like.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a construction monitoring method during the replacement process of suspenders of mid- and bottom-through arch bridges. Background technique [0002] With the development of my country's economy and the construction of key projects, the traffic volume of highways continues to increase, the increase of heavy vehicles, the emergence and increase of over-limit transportation, and overloading phenomena, etc., the load of highway bridges is becoming more and more serious, and the lack of bridge bearing capacity is common. Especially for bridges built in the 1960s and 1970s, the design load standard was relatively low. In addition, the old bridges were partially aged and damaged, and the contradiction between the bearing capacity of the bridge and the load of passing vehicles became more and more prominent. The reconstruction and reinforcement of bridges is a major...

Claims

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Application Information

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IPC IPC(8): E01D22/00
Inventor 熊学玉汪继恕汪克来王斌
Owner TONGJI UNIV
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