本文選題：基坑 + 沉降��； 參考：《巖土工程學(xué)報》2015年S2期

【摘要】：提出了一種基坑施工引起緊鄰建筑物沉降的簡化計算方法,可根據(jù)基本工程信息快速推求建構(gòu)筑物基礎(chǔ)沉降。與之前的方法相比,既考慮了基礎(chǔ)剛度對沉降的影響,又避免了繁雜的有限元計算。在總結(jié)分析地表沉降特征和分布模式的基礎(chǔ)上,結(jié)合工程經(jīng)驗和數(shù)值分析探討了坑外土體沉降隨深度變化規(guī)律。根據(jù)規(guī)律總結(jié)出基坑開挖對周邊環(huán)境影響的分區(qū)特征,提出了坑外開挖面深度以上土體沉降分布曲線的簡化計算公式。由于建筑物基礎(chǔ)剛度遠大于周圍土體,假設(shè)其沉降主要來源于下臥土層變形,即建筑沉降等同于基底埋深處的土體沉降,從而得到了根據(jù)土體沉降分布曲線來描述建筑物沉降的簡化計算方法。算例分析表明,其計算值與實測值有較好的一致性,可為預(yù)測、分析緊鄰基坑施工的建筑物沉降提供參考。
[Abstract]:A simplified method for calculating the settlement of adjacent buildings caused by foundation pit construction is proposed, which can be used to calculate the foundation settlement of the building quickly according to the basic engineering information. Compared with the previous method, the influence of foundation stiffness on settlement is considered, and the complicated finite element calculation is avoided. On the basis of summing up and analyzing the characteristics and distribution patterns of surface subsidence, the variation law of soil settlement with depth outside the pit is discussed in combination with engineering experience and numerical analysis. Based on the rules, the zoning characteristics of the influence of excavation on the surrounding environment are summarized, and a simplified formula for calculating the distribution curve of soil settlement above the depth of excavation surface is proposed. Because the stiffness of the building foundation is much larger than that of the surrounding soil mass, it is assumed that the settlement mainly comes from the deformation of the underlying soil layer, that is, the building settlement is equal to the settlement of the soil in the depth of the basement. Thus, a simplified calculation method for describing the building settlement is obtained according to the soil settlement distribution curve. The analysis of an example shows that the calculated value is in good agreement with the measured value, which can be used as a reference for predicting and analyzing the settlement of the building adjacent to the foundation pit construction.
【作者單位】： 上海交通大學(xué)土木工程系;
【基金】：國家自然科學(xué)基金項目(41330633,41172251) 上海市科學(xué)技術(shù)委員會科研項目(13231200602)
【分類號】：TU753

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本文編號：2051389