Study on Stabilizing Mechanism of Deep Excavation in Soft Clay Groud

软土地基深基坑稳定机理研究

• 批准号: 07650581
• 负责人: TAMANO Tomio
• 金额: $ 1.41万
• 依托单位: OSAKA SANGYO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650581/
• 关键词: Excavation; Soft Ground; Earth Pressure; Water Pressure; Trench; Clay; Field Test; 軟弱粘土; 石垣; 静止土圧; 主働土圧; 受働土圧; 掘削; 受動土圧

In recent years, the utilization of underground spaces has become a recognized necessity and deep excavations have been carried out extensively in urban areas. In such cases, it is important to elucidate the stabilization mechanism of the excavation. Particularly in the case of ground consisting of a soft clay, some aspects of its mechanical behavior remain to be studied.The purpose of this report is to contribute the design of lateral supporting systems for excavation. The following two subjects were mainly studied.(1) Earth and water pressures acting on braced walls in soft clayThe mechanical behavior of earth and water pressures acting on the back-and excavation-side braced walls in soft clay was investigated based on the results of detailed field measurements. Because mechanical behavior strongly depends on such factors as wall deformation, the groundwater state, and the deformation and strength properties of the soil, this study clarifies the relationship between mechanical behavi … More or and these factors. In particular, passive earth pressure on the excavation-side wall is separated into the two factors as an incremental term related to wall displacement towards the excavation side and a decremental term related to decrease of overburden pressure due to excavation.(2) Stabilizing mechanism of slurry trench excavation in soft clayThe stabilizing mechanism of a slurry trench excavation in soft clay under normal consolidation was investigated. Diaphragm wall construction, using the slurry trench method, is increasingly being applied to soft clay. To ensure the reliability of this method, it is important to clarify the stabilizing mechanism of slurry trench excavation. In this research it was recognized that the mechanism of trench wall stability in soft clay was to be studied. Consequently, normally consolidated soft clay yeilds only a slight trench displacement which achieves a balance between slurry and lateral pressures, thus permitting use of the diaphragm wall employing the slurry trench method. Less

近年来，地下空间的利用已成为人们认识到的必要性，在城市地区进行了深基坑开挖，在这种情况下，阐明开挖的稳定机制非常重要。软粘土，其力学行为的某些方面仍有待研究。本报告的目的是为开挖侧向支护系统的设计做出贡献。主要研究了以下两个主题。（1）作用在支撑上的土压力和水压力。墙壁由于力学行为很大程度上取决于墙体变形、地下水状态等因素，因此根据详细的现场测量结果，研究了软粘土中作用在后侧和开挖侧支撑墙上的土压力和水压力的力学行为。以及土壤的变形和强度特性，本研究阐明了机械行为与这些因素之间的关系，特别是，开挖侧壁上的被动土压力被分为两个因素，作为与相关的增量项。壁位移(2)软粘土泥浆沟开挖的稳定机制研究了正常固结条件下软粘土泥浆沟开挖的稳定机制。泥浆沟法越来越多地应用于软土，为了确保该方法的可靠性，阐明泥浆沟开挖的稳定机理非常重要。认识到需要研究软粘土中沟槽壁稳定性的机制，通常固结的软粘土仅产生轻微的沟槽位移，这实现了泥浆和侧向压力之间的平衡，从而允许使用采用泥浆沟槽的连续墙。方法.Les

项目成果

玉野富雄: "大深度地下工事に際しての地下水状態調査" 地盤工学会誌. Vol.43 No.9. 33-35 (1995)

Tomio Tamano：“深层地下施工期间的地下水状况调查”日本岩土工程学会杂志第 43 卷第 33-35 期（1995 年）。

玉野 富雄: "沖積層の開削を考える" 平成8年度地盤工学会関西支部講話会. 1-1 (1996)

玉野富夫：“关于冲积层开挖的思考”1996年日本岩土工程学会关西分会讲座1-1（1996）。

玉野富雄: "Numerical analysis of deep excavation" Proc.of the 5th Int.Symp.on Numerical Models Geomechanics. Vol.1. 539-544 (1995)

Tomio Tamano：“深部开挖的数值分析”Proc.of the 5th Int.Symp.on Numerical Models Geomechanics Vol.1 (1995)。

T.Tamano・S.Fukui・H.Suzuki・K.Heshita: "Stabilizing mechanism of slurr trench walls in soft clay" Proc.of the 1th ARC on SMFE,ISMFE. Vol.1. 357-360 (1995)

T. Tamano、S.Fukui、H.Suzuki、K.Heshita：“软粘土中泥浆沟壁的稳定机制”Proc.of the 1th ARC on SMFE,ISMFE Vol.1 (1995)。

玉野富雄: "Stabilizing mechanism of slurry trench walls in soft clay" 国際土質基礎工学会第10回アジア地域会議. Vol.1. 357-360 (1995)

Tomio Tamano：“软粘土中泥浆沟壁的稳定机制”，国际土壤工程学会第十届亚洲地区会议，第 1 卷（1995 年）。