超载预压 meaning in English
surcharge preloading
Examples
- The quality requirement is very high on expressway soft foundation improvement compared to the super pre - loading and the jet - powder pile , the vacuum - heaped load combining pre - compression is cheaper and its intensify effect is distinct
高速公路软基处理质量要求高，与传统等超载预压和粉喷桩加固软基相比，真空堆载联合预压加固效果明显，费用低。 - That is , the partially penetrating sand drain ground is viewed as the double - layered ground , and its consolidation is analyzed with 1 - d consolidation theory , through the transformation from 3 - d consolidation to 1 - d consolidation in the region of sand drain . this can overcome the disadvantage that the excess pore water is discontinuous between the region of sand drain and under - lying soft layer . to the double - layered ground , based on the consolidation mechanism under surcharge , the excess pore water pressure calculation formula is deduced under the condition of multilevel equably loading or unloading , which perfects the consolidation theory
然后，在充分考虑竖井区井阻、涂抹作用以及土体结构损伤破坏对固结影响的基础上，将未打穿竖井地基合理地转化为双层地基，按一维固结理论计算，克服了传统固结计算方法在竖井处理区与下卧层交界面处存在孔压间断的缺点；在此基础上，从超载预压法的基本原理出发，分析了双层地基超载预压固结、沉降机理，推导了多级等速加、卸载情况下双层地基的固结计算公式，进一步完善了双层地基固结理论。 - Through analyzing the in - situ data such as total settlement , layered settlement and pore water pressure , the actual deformation behavior of soft foundation are mastered . after summarizing the methods of predicting settlement of soft foundation and bring forward a method to predict the post construction settlement of the surcharge preloading soft foundation . and the engineering application of the predicting foundation settlement based on “ law of massaction ” and the traditional predicting methods are compared , the results shows that the model is useable and it deserves more validation in more projects
本文以深圳湾软基处理工程试验区为背景,通过对浅层沉降、分层沉降、孔隙水压力等资料的分析,掌握了软基变形的实际性状;在总结软基路堤沉降预测方法的基础上,探讨了软基超载预压工后沉降预测的参数反演法;并对地基沉降预测的“质量作用定律”模型的工程应用与传统的预测方法进行了对比,验证这种方法是可行的,得出了一些有用的结论。 - It indicts that , in the deep & thick soft ground improved by preloading or surcharge loading with sand drain partially penetrating , post - construction settlement mostly results from the dissipation of remained excess pore water pressure and the proportion of compress occurred in under - lying soft layer to total post - construction settlement is becoming larger with the time
而后，结合工程实例，分析了超载预压时间、超载大小以及竖井处理深度对深厚软土末打穿竖井地基有效应力面积比r的影响，探讨用r作为深厚软土未打穿竖井超载预压地基卸载控制标准的可行性。 - Finally , two examples show that , the availability and practicability of the new model is verified . the analysis of calculation result of berthiervill test embackment shows different part of compression curve have different influence upon the course of consolidation , and correct coefficient and viscous effect have great significance on deformation forecast . associated with the wenzhou airport runway engineering , the reason of increasing of pore - water pressuer in under - lying soft layer and post - construction settlement are given
最后，通过两个工程实例的分析来说明本文模型的有效性和实用性:一是对berthiervill填土试验场的软基实测数据和理论成果进行对比分析，阐明考虑结构性扰动和粘滞性效应对分析天然粘土固结压缩性的重要性;二是对温州机场袋装砂井超载预压工程进行数值模拟，指出停荷预压期间下卧层孔压增加和工后沉降大的原因。