本文選題：土-水特征曲線　切入點(diǎn)：降雨入滲　出處：《浙江海洋大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：我國(guó)南方地區(qū)處于亞熱帶和熱帶季風(fēng)氣候,具有雨季長(zhǎng),雨量大等氣候特點(diǎn),降雨是導(dǎo)致滑坡自然災(zāi)害的最大誘因,雨水的入滲會(huì)增加邊坡土體重度,造成巖土體軟化,弱化其抗剪強(qiáng)度,增加邊坡失穩(wěn)的風(fēng)險(xiǎn)。邊坡排水措施是邊坡穩(wěn)定性的保障,而鑒于目前邊坡排水措施多種多樣卻又存在各種缺陷和限制的窘?jīng)r,研究更具有實(shí)用性和高效性的邊坡排水措施就成了當(dāng)前急需解決的重要工程問(wèn)題。這一問(wèn)題也是眾多巖土專家學(xué)者們一直以來(lái)關(guān)注的熱點(diǎn)。為了對(duì)這一問(wèn)題進(jìn)行研究,本文做了以下幾個(gè)方面的工作:首先以浙江省衢州市某高速公路邊坡項(xiàng)目為研究對(duì)象,進(jìn)行實(shí)地考察并采集工程現(xiàn)場(chǎng)土樣,通過(guò)室內(nèi)張力計(jì)與土壤含水量測(cè)定儀聯(lián)合試驗(yàn)獲取了土樣的土-水特征曲線,并運(yùn)用ChildsCollis-Geroge數(shù)學(xué)模型計(jì)算得出土樣滲透系數(shù)函數(shù)曲線,分析了土樣的特性。接著在獲取土樣參數(shù)的基礎(chǔ)上,基于飽和-非飽和土理論,運(yùn)用Geo-Studio有限元軟件建立邊坡模型,在所建邊坡模型內(nèi)部設(shè)置虹吸邊坡排水系統(tǒng),分析其提高邊坡穩(wěn)定性的效果,并就虹吸點(diǎn)布設(shè)位置以及虹吸點(diǎn)數(shù)量對(duì)提升邊坡穩(wěn)定性的效果影響進(jìn)行了研究,結(jié)果發(fā)現(xiàn)虹吸邊坡排水系統(tǒng)對(duì)邊坡穩(wěn)定性的提高具有明顯效果,并且虹吸點(diǎn)位置無(wú)論在水平還是豎直方向上設(shè)置,其排水效果與虹吸點(diǎn)設(shè)置深度并非呈現(xiàn)出線性關(guān)系,且可確定最佳位置;相對(duì)于單個(gè)虹吸點(diǎn)來(lái)說(shuō),虹吸點(diǎn)數(shù)量越多排水效果越好,但是,虹吸點(diǎn)數(shù)量超過(guò)一定值后,數(shù)量的改變對(duì)排水效果影響作用會(huì)下降。最后結(jié)合實(shí)際邊坡工程介紹了虹吸邊坡排水系統(tǒng)的設(shè)計(jì)方案和施工流程,用實(shí)際工程效果有力的證明了虹吸邊坡排水系統(tǒng)的實(shí)用性和高效性,并對(duì)工程應(yīng)用提出了實(shí)用性的建議。
[Abstract]:Southern China is in the subtropical and tropical monsoon climate, with the characteristics of long rainy season, heavy rainfall and so on. Rainfall is the biggest inducement of landslide natural disasters. The infiltration of Rain Water will increase the severity of slope soil and cause the softening of rock and soil. Weakening its shear strength and increasing the risk of slope instability. Slope drainage measures are the guarantee of slope stability, but in view of the variety of slope drainage measures, there are various defects and limitations. The study of more practical and efficient slope drainage measures has become an important engineering problem that needs to be solved at present. This problem is also a hot topic that many geotechnical experts and scholars have been paying close attention to all along. In order to study this problem, This paper has done the following work: firstly, taking a highway slope project in Quzhou City, Zhejiang Province as the research object, the field investigation is carried out and the soil samples are collected on the spot. The soil-water characteristic curve of the soil sample was obtained by using the laboratory tensometer and the soil moisture content tester, and the permeability coefficient function curve of the soil sample was calculated by using the ChildsCollis-Geroge mathematical model. Based on the theory of saturated-unsaturated soil, the slope model is established by using Geo-Studio finite element software, and the siphon slope drainage system is set up inside the model. The effect of improving slope stability is analyzed, and the effect of siphon location and number of siphon points on slope stability is studied. The results show that siphon slope drainage system has obvious effect on slope stability improvement. And the siphon point position is not linear with the siphon point setting depth, regardless of the horizontal or vertical position, and the best position can be determined, compared with the single siphon point, The more the number of siphon points, the better the drainage effect. However, when the number of siphon points exceeds a certain value, The effect of quantity change on drainage effect will decrease. Finally, the design scheme and construction process of siphon slope drainage system are introduced in combination with actual slope engineering. The practicability and efficiency of siphon slope drainage system are proved by the practical engineering effect, and some practical suggestions for engineering application are put forward.
【學(xué)位授予單位】：浙江海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U416.14

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