本文選題：土的抗剪強(qiáng)度 + 內(nèi)粘聚力��； 參考：《中國計(jì)量學(xué)院》2015年碩士論文

【摘要】：滑坡作為一種常見的地質(zhì)災(zāi)害,它對(duì)人類社會(huì)發(fā)展和經(jīng)濟(jì)建設(shè)的危害是世界性的�；聫谋举|(zhì)上說是土發(fā)生剪切破壞,形成破壞面,隨著破壞面逐漸擴(kuò)大,連接成片后導(dǎo)致土體滑動(dòng)。而土的抗剪強(qiáng)度是巖土體一項(xiàng)重要的物理性能指標(biāo),它取決于土壤的內(nèi)粘聚力和內(nèi)摩擦力,是反應(yīng)滑坡災(zāi)害隱患點(diǎn)是否可能發(fā)生災(zāi)害的重要參數(shù)之一。結(jié)合地形地貌以及其他因素分析滑坡災(zāi)害隱患點(diǎn)的土體抗剪強(qiáng)度,可實(shí)現(xiàn)滑坡災(zāi)害的預(yù)報(bào)。因此測(cè)量土的抗剪強(qiáng)度對(duì)于滑坡隱患點(diǎn)的監(jiān)測(cè)和預(yù)防具有重要意義。本文首先介紹了幾種國內(nèi)外滑坡監(jiān)測(cè)技術(shù),再分析比較了國內(nèi)外土的抗剪強(qiáng)度測(cè)量方法的發(fā)展現(xiàn)狀,為了實(shí)現(xiàn)滑坡隱患點(diǎn)的現(xiàn)場監(jiān)測(cè),本文提出一種裝置來實(shí)現(xiàn)現(xiàn)場測(cè)量土的抗剪強(qiáng)度。該裝置由十字板、扭矩傳感器、步進(jìn)電機(jī)、單片機(jī)硬件電路等結(jié)構(gòu)組成。測(cè)量時(shí)由單片機(jī)控制步進(jìn)電機(jī),步進(jìn)電機(jī)帶動(dòng)十字板在土體中發(fā)生剪切,在與十字板同軸的扭矩傳感器上測(cè)得與剪切力相關(guān)的扭矩信號(hào),通過一系列轉(zhuǎn)換電路將扭矩信號(hào)傳送到單片機(jī),由單片機(jī)進(jìn)行數(shù)據(jù)處理后計(jì)算出土的抗剪強(qiáng)度,通過RS232通訊將數(shù)據(jù)上傳給上位機(jī)。最后通過對(duì)杭州地區(qū)的軟粘土用非飽和土直接儀和本文設(shè)計(jì)的裝置進(jìn)行了抗剪強(qiáng)度測(cè)量實(shí)驗(yàn),對(duì)比兩者得到的數(shù)據(jù)并進(jìn)行誤差分析,結(jié)果表明本文設(shè)計(jì)的裝置符合測(cè)量要求。
[Abstract]:As a common geological hazard, landslide is a worldwide hazard to the development of human society and economic construction. The landslide is essentially a soil shear failure, forming a failure surface, with the gradual expansion of the failure surface, connected into pieces, resulting in soil sliding. The shear strength of the soil is an important physical performance index of rock and soil, which depends on the cohesive force and internal friction of the soil, and is one of the important parameters to reflect the potential disaster of the hidden danger point of landslide. The prediction of landslide disaster can be realized by analyzing the shear strength of soil in the hidden danger point of landslide by combining topographic and geomorphologic factors. Therefore, it is important to measure the shear strength of soil for monitoring and prevention of landslide hidden danger points. This paper first introduces several kinds of landslide monitoring techniques at home and abroad, and then analyzes and compares the development status of soil shear strength measurement methods at home and abroad, in order to realize the site monitoring of landslide hidden danger points. In this paper, a device is proposed to measure the shear strength of soil in situ. The device is composed of cross plate, torque sensor, step motor, single chip microcomputer hardware circuit and so on. The step motor is controlled by a single chip microcomputer, and the cross plate is shearing in the soil. The torque signal related to shear force is measured on the torque sensor of the cross plate coaxial. The torque signal is transmitted to the single chip microcomputer by a series of conversion circuits, and the shear strength of the excavated soil is calculated after the data processing by the single chip microcomputer, and the data is uploaded to the upper computer through RS232 communication. Finally, the experiment of shear strength measurement is carried out on the unsaturated soil direct instrument and the apparatus designed in this paper in Hangzhou area, the data obtained from them are compared and the error analysis is carried out. The results show that the device designed in this paper meets the requirements of measurement.
【學(xué)位授予單位】：中國計(jì)量學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P642.22;TU411.7

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本文編號(hào)：1806768