Abutment node stress monitoring method of steel tube concrete arch bridge
A steel tube concrete and stress monitoring technology, applied in the direction of measuring force, measuring devices, instruments, etc., can solve the problems of limited accuracy of monitoring equipment and complicated force conditions, and achieve the effects of low cost, easy implementation, and good application effect
Inactive Publication Date: 2011-04-27
CHINA RAILWAY SIXTH GRP CO LTD +2
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However, due to the complex stress on the arch foot and the limitation of the accuracy of monitoring equipment, it is difficult to achieve
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[0020] The method for monitoring the stress of the arch foot node of a concrete filled steel pipe arch bridge provided by the present invention will be described below in conjunction with the accompanying drawings and specific embodiments.
[0021] Such as figure 1 , figure 2 As shown, the stress monitoring method of the arch foot node of the concrete-filled steel tube arch bridge provided by the invention comprises the following steps carried out in order:
[0022] 1) After the erection of multiple concrete-filled steel tubes 2 constituting the arch rib 1 is completed, in order to monitor the axial stress on the upper and lower sides of the end of the arch rib 1, a A surface-type steel string sensor 3 is respectively arranged on the circumferential surface, and a protective box is added to prevent it from colliding and falling off during subsequent construction, and then the detection line connected to it is drawn out; the setting position of the surface-type steel string s...
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The invention discloses an abutment node stress monitoring method of a steel tube concrete arch bridge. The monitoring method comprises the following steps of: preliminarily arranging a plurality of steel wire sensors on key points with great abutment stress after erecting formwork before casting the abutment part of the steel tube concrete arch bridge; then, daily reading the stress values of the sensors by a monitoring staff and correcting the stress values with temperature values at the same moment so that an engineering staff randomly monitors the stress conditions of the abutment position during the construction and the operation of the steel tube concrete arch bridge, the problems of complicate abutment node stress, monitoring difficulty or great monitoring data error of the steel tube concrete arch bridge can be solved, and the whole stress performance and the safe reliability of the whole bridge can be speculated. The method has the advantages of easy implementation, lower cost, good application effect, and the like and can be popularized and applied to construction operation of similar bridge key parts.
Description
technical field [0001] The invention belongs to the technical field of bridges, in particular to a method for monitoring the stress of the arch foot nodes of a steel tube concrete arch bridge. Background technique [0002] The concrete-filled steel tube arch bridge is an arch-shaped bridge whose arch ribs are made of steel tube concrete. Its main feature is that the steel tubes are filled with concrete. Due to the hoop effect of the steel pipe, the concrete is in a three-dimensional compression state, which can significantly increase the compressive strength of the concrete. Due to the advantages of good economy and large spanning capacity, the CFST arch bridge has been popularized and applied rapidly in our country. The concrete-filled steel tube arch bridge is basically a hingeless arch, and the arch foot joints must ensure that the arch ribs are completely consolidated in the abutment of the abutment. For non-thrust under-supported arch-girder composite bridges and rigi...
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IPC IPC(8): G01L1/00
Inventor 马祥春李自林喻春林贾建国王金海唐红何震恽振波刘振张志伟
Owner CHINA RAILWAY SIXTH GRP CO LTD