【摘要】：本文描述一種直接利用地形數(shù)據(jù)估計(jì)區(qū)域性場(chǎng)地類(lèi)別的方法,地形坡度法。我們采用SRTM30 DEM數(shù)字地形高程模型計(jì)算地形坡度,收集整理了四川省范圍內(nèi)近800個(gè)實(shí)測(cè)鉆孔資料,計(jì)算或外推了四川省653個(gè)鉆孔的(?)_s(30)值(地表至地下30m的平均剪切波速);將四川省劃分成四川西南和四川盆地2個(gè)統(tǒng)計(jì)分區(qū),分別統(tǒng)計(jì)建立了地形坡度與(?)_s(30)的相關(guān)關(guān)系,推導(dǎo)獲得了缺少實(shí)測(cè)鉆孔地區(qū)的(?)_s(30)分布;最后根據(jù)美國(guó)NEHRP規(guī)范的場(chǎng)地分類(lèi)方法,獲得了四川省場(chǎng)地類(lèi)別劃分圖。文中對(duì)收集到的深度超過(guò)30m的268個(gè)實(shí)測(cè)鉆孔數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析,建立了適合于四川省新的(?)_s(30)對(duì)數(shù)外推關(guān)系,并與Boore (2004)的關(guān)系進(jìn)行對(duì)比分析。結(jié)果表明,(?)_s(30)的外推關(guān)系具有區(qū)域性特征,本文的結(jié)果更適合四川省。依據(jù)653個(gè)鉆孔的(?)_s(30)值和相應(yīng)的坡度值(GMT/ArcGIS兩種算法計(jì)算地形坡度,最大坡度值/平均坡度值),建立了四川省(四川西南和四川盆地)新的坡度與(?)_s(30)的相關(guān)關(guān)系,并與Wald (2007)的關(guān)系進(jìn)行了對(duì)比分析;同時(shí)對(duì)兩種關(guān)系在四川省內(nèi)的應(yīng)用結(jié)果進(jìn)行了對(duì)比研究。結(jié)果表明,(1)依據(jù)四川省內(nèi)實(shí)測(cè)鉆孔數(shù)據(jù)獲得本文的坡度與(?)_s(30)關(guān)系是對(duì)Wald (2007)關(guān)系在四川地區(qū)應(yīng)用的一種修正;(2) Wald (2007)關(guān)系應(yīng)用于四川省,將導(dǎo)致場(chǎng)地分類(lèi)整體偏硬。(3)通過(guò)對(duì)四川省內(nèi)特征地區(qū)場(chǎng)地條件的分析,說(shuō)明了本文場(chǎng)地類(lèi)別劃分結(jié)果基本可以反映出四川省的場(chǎng)地條件;(4) GMT和ArcGIS坡度算法估計(jì)的各類(lèi)場(chǎng)地宏觀分布基本一致,但針對(duì)較軟的場(chǎng)地時(shí)(主要位于四川西南部)存在一定差異。最后,本文以1:50萬(wàn)數(shù)字地質(zhì)圖獲得了四川省場(chǎng)地分類(lèi),并與本文結(jié)果進(jìn)行宏觀對(duì)比分析,簡(jiǎn)單說(shuō)明了本文的場(chǎng)地分類(lèi)結(jié)果基本可靠。本文建立的(?)_s(30)對(duì)數(shù)外推關(guān)系為利用大量的不足30m的鉆孔資料估計(jì)(?)_s(30)值提供了參考;建立的坡度與(?)_s(30)的相關(guān)關(guān)系為利用容易獲得的地形數(shù)據(jù)推測(cè)不容易獲得的(?)_s(30)分布的研究提供了參考;本文的四川省場(chǎng)地分類(lèi)結(jié)果基本可以反映四川省區(qū)域性場(chǎng)地條件,研究結(jié)果基本可靠,具有一定的實(shí)用價(jià)值。
[Abstract]:This paper describes a method of estimating regional site types directly from topographic data, the topographic slope method. We use the SRTM30 DEM digital topographic elevation model to calculate the slope of the terrain, and collect and organize the data of nearly 800 boreholes measured in Sichuan Province. The values of (?) s (30) of 653 boreholes in Sichuan Province (average shear wave velocity from surface to underground 30 m) have been calculated or extrapolated. Sichuan Province is divided into two statistical zones: southwest Sichuan and Sichuan Basin. The correlation between terrain slope and (?) _ s _ (30) is established respectively, and the distribution of (?) s _ (30) in the area lacking of borehole is derived. Finally, according to the site classification method of NEHRP Code, the site classification map of Sichuan Province is obtained. Based on the statistical analysis of 268 borehole data collected in depth over 30m, a new logarithmic extrapolation relation suitable for Sichuan Province (?) s (30) is established, and the relation with Boore (2004) is compared and analyzed. The results show that the extrapolation of (?) s (30) has regional characteristics, and the results in this paper are more suitable for Sichuan Province. Based on the (?) _ s (30) value and the corresponding slope value (GMT/ArcGIS) of 653 boreholes, the topographic slope, the maximum slope value and the average slope value are calculated. The correlation between new slope and (?) s (30) and Wald (2007) in Sichuan Province (southwest Sichuan and Sichuan Basin) was established. At the same time, the application results of the two kinds of relations in Sichuan province are compared. The results are as follows: (1) the relationship between slope and (?) _ s _ s (30) obtained from borehole data measured in Sichuan Province is a correction to the application of Wald (2007) relation in Sichuan area; (2) the application of) Wald (2007 relationship in Sichuan Province will result in the overall rigid site classification. (3) based on the analysis of the site conditions in the characteristic areas of Sichuan Province, It shows that the result of site classification in this paper can basically reflect the site conditions in Sichuan Province. (4) the macroscopic distribution of all kinds of sites estimated by GMT and ArcGIS slope algorithms is basically the same, but there are some differences for the softer sites (mainly located in southwestern Sichuan). Finally, the site classification of Sichuan Province is obtained by using 1: 500 000 digital geological map, and the results are compared with the results in this paper. It is shown that the results of site classification in this paper are basically reliable. The logarithmic extrapolation relation established in this paper provides a reference for estimating the value of (?) s (30) using a large number of borehole data of less than 30 m. The relationship between slope and (?) s (30) provides a reference for the study of the distribution of (?) s (30), which is difficult to obtain by using the easily obtained topographic data. The results of site classification in this paper can basically reflect the regional site conditions in Sichuan Province, and the results of the research are basically reliable and of certain practical value.
【學(xué)位授予單位】：中國(guó)地震局地球物理研究所
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：P315.9;TU435

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳鯤;俞言祥;高孟潭;高景春;;利用強(qiáng)震記錄校正的蘆山7.0級(jí)地震峰值加速度震動(dòng)圖[J];地震地質(zhì);2013年03期

2 陳鯤;俞言祥;高孟潭;;基于地震記錄的震動(dòng)圖校正方法研究[J];應(yīng)用基礎(chǔ)與工程科學(xué)學(xué)報(bào);2013年04期

3 陳鯤;高孟潭;;“抗大地震”與低超越概率水準(zhǔn)地震動(dòng)關(guān)系的討論[J];震災(zāi)防御技術(shù);2013年01期

4 劉愛(ài)文;廈珊;呂紅山;陳鯤;徐偉進(jìn);;汶川地震極重災(zāi)區(qū)通信基站典型震害及原因分析[J];電信工程技術(shù)與標(biāo)準(zhǔn)化;2012年12期

5 陳鯤;俞言祥;高孟潭;馮靜;;用有限強(qiáng)地震動(dòng)記錄校正等震線的估計(jì)研究[J];地震學(xué)報(bào);2012年05期

6 史大成;溫瑞智;杜春清;;區(qū)域性場(chǎng)地V_s30及峰值加速度放大系數(shù)估算方法[J];地震工程與工程振動(dòng);2012年04期

7 李俊;陳劍雄;陳槞;;基于地形傾斜值的場(chǎng)地效應(yīng)校正方法研究[J];中國(guó)地震;2012年01期

8 呂悅軍;彭艷菊;施春花;蘭景巖;;北京地區(qū)中硬場(chǎng)地地震動(dòng)效應(yīng)研究[J];防災(zāi)減災(zāi)工程學(xué)報(bào);2011年05期

9 陳鯤;俞言祥;高孟潭;呂紅山;;考慮震源破裂過(guò)程的青海玉樹(shù)地震震動(dòng)圖研究[J];中國(guó)地震;2011年01期

10 陳鯤;俞言祥;高孟譚;;2010年4月14日青海玉樹(shù)地震震動(dòng)圖[J];中國(guó)地震;2011年01期

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