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Исследование грузоподъемности и транспортно-эксплуатационных характеристик мостов

Исследование грузоподъемности и транспортно-эксплуатационных характеристик мостов

Abstract

В статье приведены результаты исследования транспортно-эксплуатационных характеристик моста, расположенного в Липецкой области в зоне действия Тербунского лесхоза. Для восстановления несущей способности левобережной опоры моста по разработкам и при непосредственном участии авторов были проведены работы по инъекционному закреплению грунтов в зоне опоры. На основании лабораторных исследований был подобран состав для закрепления грунтов. Авторами были проведены испытания моста статистической нагрузкой. Испытания моста показали, что и в результате инъекционного закрепления грунтов восстановлена несущая способность свайного фундамента, а деформации опоры прекратились. Для оценки надежности и эффективности ремонтных работ были проведены статистические испытания моста. В качестве испытательной нагрузки использовались колонны грузовых машин КАМАЗ, которые устанавливались на проезжей части моста в положения, обеспечивающие максимальные усилия и деформации в расчетных сечениях. Интенсивность испытательной нагрузки составила 86+92 % от расчетных нагрузок Н-13, Т-13. В процессе испытаний замеряли: прогибы концов речных консолей, середины подвески и середины пролетного строения 1-2; местные фибровые деформации для подсчета напряжений в ребрах балок в середине пролета 1…2 м и в опорном сечении на опоре 2; вертикальные и горизонтальные перемещения опоры 1. Представлены некоторые рекомендации и предложения по дальнейшей эксплуатации моста.

The article presents the results of a study of transportperformance bridge located in the Lipetsk region in range Terbunsky forestry. To recover the carrying capacity of the bridge on the left bank development support and direct participation of the authors of the works on injection grouting in the area of support. Based on laboratory studies was matched composition for grouting. The authors performed a statistical test of the bridge load. Bridge test showed that as a result of injection grouting restored pile foundation bearing capacity and deformation of the support stopped. To assess the reliability and effectiveness of repairs were carried out statistical tests of the bridge. The test load used columns KAMAZ trucks, which were installed on the roadway of the bridge in the provisions to ensure maximum effort and strain in the calculated cross sections. The intensity of the test load was 86 +92 % of design load H -13, T-13. During the tests measured : all deflections river consoles mid suspension and midspan of 1-2 ; local fiber strain for counting the edges of the beams at voltages at midspan 1... 2 m and at the reference section to the support 2; vertical and horizontal movement of the support 1. presents some recommendations and suggestions for the further operation of the bridge.

Keywords

МОСТ, ГРУЗОПОДЪЁМНОСТЬ, ТРАНСПОРТНО-ЭКСПЛУАТАЦИОННЫЕ ХАРАКТЕРИСТИКИ, ДЕФОРМАЦИЯ, ФУНДАМЕНТ, ПРОЛЕТ, СЕЧЕНИЕ, КОНСОЛЬ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold