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本文以京津塘高速公路软土地基沉降的环境为背景，针对沉降设计标准中的团结问题，以检验和完善设计、指导施工为目的的大型试验工程为依托，以近3年多的观测资料为依据，主要阐述：次团结的发生与机理；次团结在垂直排水团结中的意义、作用及其地位；当前国内外在软土地基处理设计中次团结的考虑与量值的推算；京津塘高速公路对次固结的分析研究；并着重阐述应用沉降速率分析法，对3年来大量的沉降观测资料的统计分析研究，推算出京津塘高速公路津塘段路堤作用下软土地基的次团结量值。
In this paper, the environment of settlement of soft soil foundation of Beijing-Tianjin-Tangshan Expressway is taken as the background. In view of the solidarity in settlement design standards, based on the large-scale pilot project for the purpose of testing and perfecting the design and guidance construction, Based on, it mainly elaborates the occurrence and mechanism of secondary solidarity, the meaning, function and status of secondary solidarity in vertical drainage solidarity; the current consideration and quantity calculation of secondary solidarity in soft soil ground treatment design at home and abroad; Expressway sub-consolidation analysis and analysis; and emphatically elaborated the application of sedimentation rate analysis method, statistical analysis of a large number of subsidence observations over the past three years to calculate the subgrade under the Jintang Expressway Jintang section under Unity value.