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BUILDING RESPONSE TO EXCAVATION-INDUCED GROUND MOVEMENTS.

机译：建筑对开挖引起的地面运动的响应。

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摘要

Case histories of the distortion of and damage to structures adjacent to tunnels and excavations were investigated. Both ground movements and building response were measured at two test sites in Washington, D.C. The structures at the two test sites were instrumented to measure settlement and tilt of the walls and foundations, and lateral and diagonal displacements between the column lines and the bearing walls at various floor levels. From these data, the angular distortion, tilt, lateral extension, shearing and bending of the structures were determined.; Additional data were gathered at other sites in Washington, D.C., and Chicago through construction records and field inspections. The ground surface settlement data, building response data, and the progress of excavation data were compared and related.; Supporting analyses and parameter studies were made and related to the field data. A deep beam model that included the effect of horizontal strain was employed to investigate the response of brick bearing walls to excavation-induced ground movements. The FINITE program was used to model the behavior of frame structures adjacent to open cuts.; Criteria, that considered both lateral strain and angular distortion were developed. The criteria compared favorably to the field data gathered, existing criteria for buildings settling under their own weight (no lateral strains), and criteria (based on lateral strains only) for damage due to mining. As lateral extension strain increased, the tolerance of structures to angular distortion decreased. Minor architectural damage to brick bearing wall structures developed when angular distortions and lateral extension, due to excavation-induced ground movements, were both approximately 1/1000. Infill frames began to experience damage at angular distortions and lateral strains of about 1/750. In contrast, minor damage to buildings settling due to self-weight began at about 1/500. For structures adjacent to excavations, the convex-shaped settlement profile produced a condition where the lateral strains and angular distortions were additive in their effect on the total extension strains in the buildings.; The study showed that the most useful relationships between building damage and distortions could be established when both lateral strains and angular distortions were measured. However, some estimate of the lateral ground strains affecting a structure could be made based upon the settlement slopes if the settlement profile shape, and the size and position of the structure with respect to the settlement profile were known. Once a reasonable estimate of the ground movements caused by an excavation was made, the figures and tables presented in this report could be used to estimate the response of a structure and the resulting damage.
机译：研究了邻近隧道和基坑的结构变形和损坏的案例历史。在华盛顿特区的两个测试点都测量了地面运动和建筑物响应。在这两个测试点处的结构进行了测量，以测量墙和地基的沉降和倾斜以及柱线与承重墙之间的横向和对角位移。各种楼层。根据这些数据，确定结构的角度变形，倾斜，横向延伸，剪切和弯曲。通过施工记录和现场检查，在华盛顿特区和芝加哥的其他地点收集了更多数据。比较并关联了地表沉降数据，建筑物响应数据和开挖进度。进行了辅助分析和参数研究，并与现场数据相关。采用包括水平应变影响的深梁模型来研究砖瓦承重墙对开挖引起的地面运动的响应。 FINITE程序用于对邻近明挖的框架结构的行为进行建模。制定了同时考虑横向应变和角度变形的标准。该标准与收集的现场数据，现有建筑物在其自身重量下沉降的标准（无侧向应变）以及因采矿造成的破坏的标准（仅基于侧向应变）进行了比较。随着横向拉伸应变的增加，结构对角度变形的容忍度降低。当由开挖引起的地面运动引起的角度变形和横向延伸都大约为1/1000时，对承重墙结构的轻微建筑破坏。填充框架在角度变形和横向应变约为1/750时开始受到损坏。相反，由于自重而对建筑物沉降造成的轻微损坏始于大约1/500。对于邻近基坑的结构，凸形沉降轮廓产生了一种条件，其中横向应变和角度变形会影响建筑物中的总拉伸应变。研究表明，当同时测量横向应变和角度变形时，可以建立建筑物损坏与变形之间最有用的关系。但是，如果沉降轮廓的形状以及结构相对于沉降轮廓的尺寸和位置是已知的，则可以根据沉降斜率对影响结构的侧向地面应变进行一些估算。一旦对开挖引起的地面运动做出了合理的估计，本报告中提供的图和表就可以用来估计结构的响应以及由此造成的破坏。

著录项

  • 作者

    BOSCARDIN, MARCO DAVID.;

  • 作者单位

    University of Illinois at Urbana-Champaign.;

  • 授予单位 University of Illinois at Urbana-Champaign.;
  • 学科 Engineering Civil.; Geological Survey.
  • 学位 Ph.D.
  • 年度 1980
  • 页码 298 p.
  • 总页数 298
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

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