本文關(guān)鍵詞： 不確定地層屬性 地下工程結(jié)構(gòu)設(shè)計體系 魯棒性 破壞機(jī)理 相關(guān)性　出處：《鐵道學(xué)報》2017年05期 　論文類型：期刊論文

【摘要】：提出地下工程結(jié)構(gòu)設(shè)計體系的魯棒性概念,建立地下結(jié)構(gòu)力學(xué)響應(yīng)與魯棒性的聯(lián)系,明確土壓對地下結(jié)構(gòu)魯棒性產(chǎn)生的控制性影響,以典型地下結(jié)構(gòu)樁基礎(chǔ)為樣本,討論主被動土壓-地下結(jié)構(gòu)位移-破壞機(jī)理-體系魯棒性之間的聯(lián)成關(guān)系。給出魯棒-應(yīng)力解析模型,對不確定地層屬性相關(guān)的軟硬互層(如特殊液化滑移)、交界面地層中地下結(jié)構(gòu)的魯棒響應(yīng)進(jìn)行針對性評價。結(jié)合地下工程典型樁基的破壞實例,分析其破壞機(jī)理及魯棒應(yīng)力響應(yīng)模式,以給出特殊邊界條件下的應(yīng)力解。對比樁基破壞的監(jiān)測調(diào)查實例發(fā)現(xiàn):樁基礎(chǔ)等典型地下結(jié)構(gòu)的整體魯棒性特征與地上結(jié)構(gòu)的鞭梢效應(yīng)不同,呈現(xiàn)與不確定地層屬性密切相關(guān)的類線性整體折斷+局部塌沉特點,初步驗證評價解析方法的有效性及實用性,為不確定地層屬性相關(guān)地下工程的魯棒性及地下結(jié)構(gòu)設(shè)計提供一種對比參考。
[Abstract]:The robustness of the concept of underground engineering structure design system, establishing the mechanical response of the underground structure and the robustness of the control effect, clear soil pressure generated on underground structural robustness, a typical underground structure pile foundation as a sample, discuss the main passive earth pressure and underground structure displacement and failure mechanism between the robustness of the system Liancheng. Give a robust stress analytical model of uncertain stratigraphic attributes related to soft and hard interbedded (such as special slip, robust to liquefaction) of underground structure in the formation of the interface for evaluation of response. Combined with the typical failure case of pile foundation of underground engineering, analyzes the failure mechanism and robust stress response mode to stress solution under special boundary conditions are given. Compared the pile foundation failure monitoring survey examples: characteristics and the overall robustness of the pile foundation and other typical underground structure on whiplash effect of structure is not the same, showing The characteristics of the linear global fracture and local collapse are closely related to the uncertain stratigraphic attributes. It preliminarily verifies the effectiveness and practicability of the evaluation and analysis method, and provides a reference for the uncertainty of the underground properties related to the formation attributes and the design of underground structures.

【作者單位】： 北京交通大學(xué)城市地下工程教育部重點實驗室;北京交通大學(xué)土木建筑工程學(xué)院;中國中建設(shè)計集團(tuán)有限公司;
【基金】：國家自然科學(xué)基金(51378051,51678038) 霍英東教育基金會應(yīng)用優(yōu)選資助(122009) 中國國家留學(xué)基金(201707095041)
【分類號】：TU93
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本文編號：1504511