Adjustable suspended cable method for testing bridge deflection

A bridge deflection and adjustable technology, applied in the direction of elastic testing, machine/structural component testing, measuring devices, etc., can solve problems such as inconvenient operation and bulky measuring system, and achieve time-consuming and labor-consuming, small equipment volume, The effect of reasonable structural design

Inactive Publication Date: 2016-02-17
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide an adjustable suspension method for testing bridge deflection, which is suitable for small spans and large spans, especially for overhead arch bridges, and solves the problems in the prior art. In the process of bridge deflection measurement, in order to ensure the measurement accuracy, the measurement system is bulky and the operation is inconvenient.

Method used

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  • Adjustable suspended cable method for testing bridge deflection
  • Adjustable suspended cable method for testing bridge deflection
  • Adjustable suspended cable method for testing bridge deflection

Examples

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Embodiment

[0044] This embodiment provides an adjustable suspension cable method for testing bridge deflection, such as Figure 1 to Figure 6 As shown, an arch bridge with a total length of 81m and an upper structure of 60m, the bridge deck width: net -7.0+2×1.25m (sidewalk and guardrail), the lower structure is a gravity abutment and an enlarged foundation. The main cable 8 uses 7*7=49 strands of steel wire twisted to form a steel wire rope with a diameter of 4 mm. The method specifically includes the following steps:

[0045] Step 1. Before measuring the deflection of the bridge 15, drive the M8 type expansion bolt 2 with ring type into the pre-determined position in the anti-collision wall 4, install the sliding rail 5 on the expansion bolt 2, and install the column 6 on the sliding rail 5. The column 6 and the sliding track 5 are locked by a lock nut 3, and the top of the column 6 is installed with a 6000U8*45*13 fixed pulley 7;

[0046] Step two, the main cable 8 is turned by the fixed...

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Abstract

The invention provides an adjustable suspended cable method for testing bridge deflection. A main cable is erected above a bridge crash barrier at two sides of the bridge; a pulley carriage is suspended on the main cable; a crossbeam transversely and horizontally placed below the bridge bottom is suspended on the pulley carriage; a remote control winch capable of enabling the crossbeam to life vertically is arranged on the crossbeam; multiple dial gauge frames for fixing dial gauges can be arranged on the crossbeam according to test requirements, and when the deflection is measured, the remote control winch is adjusted to enable the measurement head of each dial gauge to abut against the bottom of an arch rib; and a winch is arranged on an anti-crash wall outside a bridge span, the winch drives the pulley carriage via a traction rope to move on the main cable, and thus the dial gauge can reach a target measurement point. A test loading vehicle passes across the surface of the bridge, and the dial gauges are matched with a data acquisition instrument for automatically acquiring the bridge deflection data.

Description

Technical field [0001] The invention belongs to the field of road bridges, relates to the measurement of bridge deflection, and in particular relates to an adjustable suspension cable method for testing bridge deflection. Background technique [0002] Bridge deflection is a very important data for bridge structures. It directly reflects the vertical overall stiffness of the bridge structure, judges the weak parts of the bridge and the integrity of the structure, and is used in bridge verification, dangerous bridge reconstruction, and new bridge acceptance. Need to accurately measure the static and dynamic deflection values ​​of the bridge. At present, there are many methods for measuring bridge deflection at home and abroad, which are mainly divided into two categories, namely fully manual measurement method and automatic measurement method; the fully manual measurement method includes mechanical measurement method and optical instrument measurement method, and mechanical measure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M5/00
Inventor 王晓明杨纪鹏杨辉东孙天杨国俊乔星昇段玮
Owner CHANGAN UNIV
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