2萬字           52頁

摘  要

目前國內(nèi)公路橋涵大多使用混凝土材料或石料，對于修建在膨脹土，軟土上的管涵而言，由于易產(chǎn)生地基沉降變形以及自身的壓縮變形，因此容易導(dǎo)致涵洞破壞。而鋼波紋管擁有很好的柔性和很高的強(qiáng)度，能夠改善對地基和基礎(chǔ)變形的適應(yīng)能力。本文以某高速路段鋼波紋管涵洞為研究背景，通過數(shù)值計(jì)算，對施工過程中鋼波紋管的應(yīng)力和變形變化規(guī)律進(jìn)行研究，主要工作如下：

（1）通過對鋼波紋管性能極限狀態(tài)的研究，探討其破壞過程和機(jī)理，并建立鋼波紋管在填土載荷作用下的內(nèi)力和變形公式。

（2）對鋼波紋管的波紋形狀、約束條件、邊界條件進(jìn)行簡化，建立計(jì)算模型，并對不同填土高度、壁厚和管徑下鋼波紋管的應(yīng)力和變形變化規(guī)律進(jìn)行研究。

（3）根據(jù)數(shù)值計(jì)算結(jié)果，結(jié)合施工工藝，對鋼波紋管的施工過程提出一些建議。

關(guān)鍵詞：鋼波紋管；應(yīng)力與變形；數(shù)值模擬；施工建議 

 

ABSTRACT

The culvert of bridge and road built in china are mostly made of concrete or rock.Some of them built on the soft soil or expansion soil are easy to be destroy, due to the settlement of foundation and the compression of itself.However,corrugated steel pipe can adapt the settlement of foundation,because it’s great tenacity and it has great strength.The background of the thesis is a foundation of a high road in guandong.We study the stress and the transformation of the corrugated steel pipe during the construction by numerical modeling.The main work is as follows:

(1)Performance limit of corrugated steel pipe are studied and discussed based on the analysis and concluded on the performance limit of the buried circular tube ,and and analyze the failure process and mechanism.Using the rotational symmetry shell theory,and establish the calculation formula of internal force and deformation of the corrugated steel pipe culvert.