【摘要】：采用各種探測(cè)手段揭示目標(biāo)介質(zhì)內(nèi)部構(gòu)造一直是工程界所關(guān)心的重要課題。以三維層狀介質(zhì)中的彈性場(chǎng)傳播特性為基礎(chǔ),建立基于橫波傳播特性的無(wú)損檢測(cè)方法。采用有限元數(shù)值模擬方法,針對(duì)含有低速夾層的水平層狀介質(zhì)模型,獲得下部介質(zhì)變化時(shí)橫波響應(yīng)波形數(shù)據(jù),并對(duì)其進(jìn)行波形形態(tài)、響應(yīng)能量等特性分析,揭示當(dāng)?shù)退賷A層介質(zhì)的物理參數(shù)改變時(shí),在模型表面接收到的橫波響應(yīng)特性與下部介質(zhì)的相對(duì)密實(shí)度等參數(shù)的關(guān)系,明確基于橫波傳播特性的無(wú)損檢測(cè)方法的有效性和精確性。在數(shù)值計(jì)算的基礎(chǔ)上,開(kāi)展沉管隧道底板灌砂全尺寸模型試驗(yàn)研究,采集灌砂施工前后的橫波響應(yīng)波形數(shù)據(jù),通過(guò)對(duì)橫波響應(yīng)波形形態(tài)及響應(yīng)能量分布進(jìn)行可視化處理,實(shí)現(xiàn)對(duì)沉管隧道底板灌砂效果的評(píng)價(jià)。
[Abstract]:It has been an important subject in engineering field to reveal the internal structure of target medium by various detection methods. Based on the propagation characteristics of elastic field in three dimensional layered media, a nondestructive testing method based on the propagation characteristics of shear wave is established. Based on the horizontal layered medium model with low velocity intercalation, the shear wave response waveform data are obtained by using finite element numerical simulation method, and the waveform shape and response energy are analyzed. When the physical parameters of the low-velocity intercalated medium change, the relation between the response characteristics of the shear wave received on the surface of the model and the relative density of the lower medium is revealed, and the validity and accuracy of the nondestructive testing method based on the propagation characteristics of the shear wave are clarified. On the basis of numerical calculation, the full-scale model test of sand filling on bottom plate of immersed tunnel is carried out, and the wave data of shear wave response before and after sand pouring are collected, and the shape of wave shape and response energy distribution of shear wave response are visualized. The effect of sand filling on bottom plate of immersed tunnel is evaluated.
【作者單位】： 上海交通大學(xué)船舶海洋與建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(11372180)
【分類(lèi)號(hào)】：U459.5

【相似文獻(xiàn)】

相關(guān)期刊論文 前3條

1 仝剛太;齊從軍;;丹豫高速公路武關(guān)河采金洞治理[J];徐州建筑職業(yè)技術(shù)學(xué)院學(xué)報(bào);2006年04期

2 楊修志;;片石灌砂基層在村村通工程中的應(yīng)用[J];公路交通技術(shù);2006年06期

3 劉仰韶;田卿燕;呂建兵;;公路橋涵臺(tái)背回填中粗砂相對(duì)密實(shí)度的質(zhì)量評(píng)定方法研究[J];公路;2005年12期

，

本文編號(hào)：2354239