Acoustic Non-Destructive Testing Technology in Concrete Bridge Inspection and Pile Foundation Detection

This article takes the actual construction project of a certain concrete bridge project as an example to analyze the application of acoustic non-destructive testing technology in its detection.It includes an overview of a certain bridge construction project studied and acoustic non-destructive testing technology and the application of acoustic non-destructive testing technology in actual testing.This analysis hopes to provide some guidelines for acoustic non-destructive testing of modern concrete bridge projects.

Analysis of Bridge Inspection Technology for Highway Reconstruction and Expansion

This article focuses on bridge testing technologies in highway construction and expansion projects.It provides an overview of the inspection process for bridges in highway reconstruction and expansion projects,the main inspections,and strategies for improving the quality of inspections.Relevant units should conduct bridge inspections using appearance inspections,special inspections,and bearing capacity assessments in highway reconstruction and expansion projects.To effectively improve testing quality,relevant units should also focus on establishing and improving testing standards,strengthening material testing,and improving the overall quality of the testing personnel.This research aims to enhance the quality of highway reconstruction and expansion projects by supporting the sensible application of bridge inspection technology.

Applications of Ultrasonic Detection Technology in Bridge Concrete Pile Foundation Detection

In this paper,the application strategy of ultrasonic detection technology in the detection of concrete foundation piles is analyzed using a construction project as an example.It includes a basic overview of the project,an overview of ultrasonic testing technology in bridge concrete pile foundation testing,and an analysis of its practical application in the concrete pile foundation testing of this project.The objective of this analysis is to provide some reference for the application of ultrasonic testing technology and the improvement of the quality of bridge concrete pile foundation testing.

Technologies for Asphalt Pavement Surface Testing in Road and Bridge Construction

Asphalt pavement is currently one of the main components in the construction of roads and bridges.However,from a practical point of view,various quality problems are prone to occur in the surface layer of asphalt pavement,which will lead to the poor overall quality of road and bridge projects.Therefore,it should be applied reasonably.Advanced testing technologies are used to test the mixture quality,compaction,segregation,thickness,and other aspects of the asphalt pavement surface layer,so as to improve the quality of the asphalt pavement surface layer,and then improve the overall quality of road and bridge construction.Therefore,this paper mainly analyzes the technologies for asphalt pavement surface layer testing in road and bridge engineering construction.

Technical Analysis of Highway Bridge Static Load Test

Highway bridges are an important part of the transportation industry and can promote social economic construction and development.In actual operation,highway bridges are often damaged due to overload and natural factors,which tend to affect the safety and shorten the service life of these bridges.Assessing the overall state and performance of highway bridges is therefore a key element.Static load test,which is a type of sustainable detection experiment,has many advantages,including low cost,high efficiency,and high accuracy.In this paper,the bridge structure is analyzed through the application of theoretical calculations and relevant comparisons,so as to judge the operating state of the bridge.

Application Strategy of CBR Test in Highway Engineering

California Bearing Ratio(CBR)test is highly professional and requires a high level of skills.In order to improve the accuracy of the test results,the relevant staff will not only need to understand the rules and procedures involved in the test,they would also need to be meticulous in their work to avoid human errors,provide good data support for highway engineering,and improve the overall quality of the project.Therefore,this paper presents an analysis of the application of CBR test in highway engineering,which can provide reference for engineering and promote the development of the highway industry.

Design of comprehensive test system for detecting overlying strata mining-induced fractures on surface with radon gas

Based on radon gas properties and its existing projects applications, we firstly attempted to apply geo- physical and chemical properties of radon gas in the field of mining engineering, and imported radioac- tive measurement method to detect the development process of the overlying strata mining-induced fractures and their contained water quality in underground coal mining, which not only innovates a more simple-fast-reliable detection method, but also further expands the applications of radon gas detection technology in mining field. A 3D simulation design of comprehensive testing system for detecting strata mining-induced fractures on surface with radon gas (CTSR) was carried out by using a large-scale 3D solid model design software Pro/Engineer (Pro/E), which overcame three main disadvantages of ''static design thought, 2D planar design and heavy workload for remodification design'' on exiting design for mining engineering test systems. Meanwhile, based on the simulation design results of Pro/E software, the sta- bility of the jack-screw pressure bar for the key component in CTSR was checked with a material mechan- ics theory, which provided a reliable basis for materials selection during the latter machining process.

基于振动台试验的加筋土柔性桥台抗震设计参数取值方法对比分析

目前土工合成材料加筋土柔性桥台(GRS桥台)在静力荷载作用下的设计、施工已有标准化的技术指南,但对于GRS桥台的抗震设计方法,只有一些原则性和框架性的建议,没有具体参数的取值方法,需要进一步完善。首先对国内、外相关规范或标准中关于加筋土挡墙抗震设计参数取值的方法进行列表汇总与比较,定性地分析其异同。在此基础上,结合1g重力场下的振动台缩尺模型试验监测数据,通过试验实测值与规范取值的对比,检验现有加筋土挡墙抗震设计参数取值方法对GRS桥台的适用性,并提出相关建议。研究结果表明:GRS桥台产生较大变形的临界加速度至少为0.6g,大于一般加筋土挡墙的0.3g~0.4g;在达到临界加速度(0.6g)之前,GRS桥台基本不受损伤且侧向变形增量不超过0.5%,因此建议GRS桥台的抗震设计按桥台侧向变形增量不超过0.5%进行控制。在此前提条件下,国外NCMA、FHWA和AASHTO规范对于水平地震系数的取值方法基本适用于GRS桥台,可用于GRS桥台整体外部稳定性的验算;对于GRS桥台面层顶部局部稳定性的验算,则需借鉴国内公路规范的理念,进一步研究提出更为合理的加速度放大系数取值方法。NCMA规范关于筋材轴力动力增量的取值方法适用于GRS桥台,且在设计上偏于安全;FHWA和AASHTO规范的方法则需修正后才能使用。

采用后张预制板技术的组合梁负弯矩段长期抗裂性能研究

组合梁负弯矩区在受拉的不利作用下容易出现混凝土开裂、挠度过大等病害,混凝土长期收缩徐变作用会进一步加重这些病害,严重影响组合梁桥的受力性能。该文提出一种后张预制板抗裂技术,在考虑收缩徐变作用的情况下,基于依托案例进行有限元数值模拟分析,验证该技术的有效性。为考虑收缩徐变作用,该文基于AAEM法的收缩徐变计算原理,编写了适用于ABAQUS显/隐式的时变效应程序,并基于组合梁长期试验验证时变效应程序及有限元建模方法的可行性。研究结果表明:基于AAEM法编写的收缩徐变预测模型及有限元建模方法有较好的适用性,与试验结果较为吻合,误差较小;后张预制板抗裂技术有效降低了因收缩徐变引起的挠度增加、预应力损失,提高了桥梁受力性能。该文可为组合梁负弯矩区开裂问题提供技术参考,也为有限元模拟考虑收缩徐变效应提供一定理论基础。

基于模态柔度的损伤连续梁桥虚拟荷载试验方法研究

为了快速评估连续梁桥承载能力和实际运营状态,提出基于模态柔度的虚拟荷载试验方法。以某实际工程(40+40+40)m的3跨连续梁桥为研究对象,采用数值模拟方法对其进行深入分析;将主梁单元的弹性模量折减30%模拟梁桥损伤,在白噪声激励下,运用SSI(stochastic subspace indentification)模态参数识别技术识别损伤梁桥的模态参数,进一步构建位移柔度矩阵;设计虚拟荷载试验方案,预测损伤梁桥在虚拟荷载下的模态挠度,计算结构校验系数。结果表明:环境激励下,只需在3跨连续梁桥四分点截面布置42个测点即可准确识别连续梁桥的动力特性参数;仅需前6阶模态参数即可预测虚拟荷载试验下连续梁桥关键截面的模态挠度;偏载、中载工况下3跨连续梁桥的结构校验系数均大于1,表明梁桥的承载能力不满足设计要求,需要及时维修养护。基于模态柔度的虚拟荷载试验方法在评估3跨连续梁桥的实际承载能力领域有一定应用潜力,可为工程实践提供可靠的技术支持。

基于实测频率振型的大跨斜拉桥响应面模型修正研究

为了验证基于实测频率和振型的响应面模型修正方法的准确性与可行性,以某大跨斜拉桥为工程背景,分别进行静载试验和环境激励下的模态测试。以竖向前4阶实测频率及振型作为状态变量,选取合理的修正参数,进行中心复合试验设计;采用考虑交互项的响应面模型进行数据拟合,并计算参数R^(2)值的范围,进行精度检验;分析频率及振型的改变率,将修正后模型的挠度与实测挠度进行对比,验证该模型修正的准确性。结果表明:在参数范围内,各响应面模型的R^(2)值均接近于1,拟合精度较高;修正后模型的频率与振型均接近实测值,能准确反映桥梁的动力特性;修正后模型的挠度计算值与实测值最大误差不超过7.98%,满足工程精度要求,能够真实反映大跨斜拉桥的工作状态。研究证明了基于实测频率与振型的响应面模型修正方法对大跨斜拉桥的适用性和可行性,可为实际工程中类似桥梁的模型修正提供参考。

蓄能发光涂层应急照明试验测试及其在桥涵通道工程中的应用前景分析

试验测试蓄能发光涂料涂层的亮度余辉,分析其涂层厚度与亮度关系,结果显示,多功能蓄能发光涂料涂层在厚度为0.35 mm时,余辉时间为13.5 h,蓄能发光涂层亮度随厚度先增加后达到饱和状态,负离子释放量超过1500个/cm^(3),在桥涵隧道工程中具有较好的应用前景。

既有桥梁检测与加固工程关键技术研究

为了提升既有桥梁的安全性能及延长其使用寿命,本文通过介绍既有桥梁检测与加固工程的概况,详细分析了桥梁检测点的布置方法、荷载布置与检测技术、桥梁承载能力的评定标准,并基于评定结果提出了针对性的桥梁加固施工方案。研究结果表明,科学合理的检测点布置和荷载设计能够有效评估桥梁的实际承载能力,而基于评估结果的加固施工措施能够显著提高桥梁的结构强度和稳定性,为既有桥梁的安全运营提供了有力的技术支撑。

新型无人机检测技术在桥梁检测工程中的应用策略

文章研究了新型无人机检测技术在桥梁检测工程中的应用策略,在明确无人机检测技术适用性的基础上,从总体检测流程、无人机路径规划、摄影图像预处理、裂缝边缘分割、裂缝信息获取等方面出发,分析了桥梁检测工程中新型无人机检测技术应用要点,有利于提高桥梁检测的全面性和精确度,为桥梁维护管理提供科学决策。

高速公路路基检测技术及试验数据处理

为了研究高速公路路基检测技术及试验数据处理,提高公路路基的整体稳定性和结构强度,论文总结了高速公路路基检测中存在的问题,包括室内检测具有局限性以及检测指标不一致,研究了高速公路路基质量的检测方式,包括压实质量检测、弯沉检测、含水率检测、击实试验,并提出几项常见且实用的路基检测试验数据处理方式,如表格法、图示法、经验公式法。

后张法预应力混凝土桥梁施工技术应用研究

为了提升桥梁工程施工技术水平,总结了预应力混凝土的基本理论,从检查工作、张拉方式、张拉顺序等方面阐述了后张法张拉预应力混凝土构件的准备工作。同时,以市政某空心板桥梁为研究对象,分析了后张法张拉预应力混凝土的具体施工工艺,并对张拉效果进行评价。结果表明,板梁的伸长率均小于6%,满足规范和设计文件要求。

公路水泥稳定级配碎石层试验检测技术的应用分析

水泥稳定碎石基层施工质量直接关乎公路的总体品质,并对公路未来的安全稳定运行具有深远影响。鉴于此,强化水泥稳定碎石层的试验与检测工作显得尤为关键。本文通过对公路水泥稳定碎石层的试验检测技术的分析,提出了详尽的技术应用策略,旨在为同类工程项目提供有价值的参考借鉴,以促进工程质量的全面提升。

试论建筑工程检测技术的应用与发展

建筑工程是我国城镇化的支撑产业之一。建筑工程的质量关系到居民的生命健康与财产安全。建筑工程的检测工作是安全工作的重点。科技进步使得建筑工程的检测技术不断更新,检测的范围扩大,检测的精度也得到提高。本篇文章介绍当前建筑工程结构检测技术的检测内容和具体手段,以此为根据分析建筑工程结构检测技术发展的方向与趋势,以期促进建筑工程检测技术的进一步发展。

基于桩基检测技术的建筑工程混凝土结构检测探讨

通过探讨低应变检测法、声波透射法及钻芯法在混凝土结构完整性、承载力及缺陷识别与定位中的具体应用,揭示了这些技术在现代建筑工程中的不可替代性。综合分析表明:桩基检测技术不仅是确保建筑工程质量和安全的重要工具,而且在推动建筑行业技术进步中发挥着重要作用。

市政道桥工程试验检测问题与优化措施

本研究探讨了市政道桥工程中常见的试验检测问题及其优化措施,发现主要问题包括检测设备的陈旧、检测人员的专业水平不足、检测标准的不统一以及检测流程的不完善,这些问题直接影响了工程质量控制及评估工作的实效性。针对这些问题,本文认为工程要从更新检测设备、加强人员培训、统一检测标准、优化检测流程等主要方面着手,同时引入先进的检测技术和信息化管理系统,为市政基础设施的可持续发展提供坚实保障。