ah09014xiu平原地區(qū)公路路基震害類型及機理分析最終修改稿-在線瀏覽
2024-09-30 17:02本頁面
【正文】 的強度線）?？梢妕2時刻的豎向地震力同樣導(dǎo)致了土體強度的降低，造成土坡的失穩(wěn)破壞。圖8 豎向地震力對土體單元應(yīng)力狀態(tài)的影響 Effects of vertical seismic force on stress state of soil elements 地震次生災(zāi)害的影響地震引起滑坡、崩塌、泥石流等次生地質(zhì)災(zāi)害，這些次生震害會破壞公路路基的穩(wěn)定性，引起路基路面的破損，影響公路的正常運營。3 路基震害的防治措施平原地區(qū)道路在選線上應(yīng)注意濕陷性黃土、軟土、膨脹土等的影響，還要在填料選擇、壓實質(zhì)量和防排水方面采取措施。地下水產(chǎn)降低了巖土體的抗剪強度，使高陡路塹邊坡變形失穩(wěn)加速。1）盡量避免在地勢低洼地帶、沿河或水渠修筑路基，不得已時，也應(yīng)盡量遠離河岸、水渠。同時，還要加強路基排水，避免路側(cè)積水。盡量使路肩與行車道部分具有相同的密實度。5）盡量采用黏性土做填筑路堤的材料，避免使用低塑性的粉土或砂土。1）根據(jù)地震破壞特點，平原地區(qū)公路路基的常見震害類型有：路基沉陷、地基液化、地裂縫以及路基路塹邊坡失穩(wěn)。3）平原區(qū)公路建設(shè)應(yīng)在道路選線、填料選擇、施工質(zhì)量等方面加強震災(zāi)的防治措施。 Tech(清華大學(xué)學(xué)報：自然科學(xué)報), 2007, 47(6): 789–792．[5] QIAN Peifeng(錢培風(fēng)). Vertical seismic load and earthquake resistant block building(豎向地震力和砌塊抗震研究)[M]. Beijing: China Land Press, 1997: 5–12．[6] CHEN Nianying(陳念英), ZENG Dundi(曾敦弟). Vertical seismic load and its hazards[J]. Journal of Chengdu University: Natural Science(成都大學(xué)學(xué)報：自然科學(xué)版), 1998, 17(2): 47–50.Classification of earthquake damage along roadbed in plain country and analyses of its mechanismHOU Chaoqun, WANG Xiaomou, ZHOU Zhijun, LI Haibin(School of Highway, Chang’an University, Xi’an 710064, China)Abstract: China is an earthquakeprone country. Earthquake brings great loss of life and property, for example, the Wenchuan Earthquake which happened on May 12, 2008 in Sichuan province of China. As an important lifeline engineering, highway transportation system is destroyed severely in this deadly disaster. The earthquake destroys side slope, roadbed, and pavement of highroad, impacts normal operating system of transportation in the disaster region, and
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