發(fā)布時(shí)間：2018-06-18 06:17

  本文選題：吹填砂 + 粉細(xì)砂　； 參考：《水運(yùn)工程》2016年05期

【摘要】：針對(duì)汕頭東部經(jīng)濟(jì)帶吹填粉細(xì)砂,通過(guò)動(dòng)三軸試驗(yàn),研究粉粒含量、黏粒含量、初始相對(duì)密實(shí)度、固結(jié)應(yīng)力、固結(jié)應(yīng)力比對(duì)吹填粉細(xì)砂動(dòng)強(qiáng)度的影響規(guī)律。試驗(yàn)結(jié)果表明,吹填粉細(xì)砂動(dòng)強(qiáng)度隨粉粒含量增加而降低,破壞振次相同時(shí),粉粒含量為18%時(shí)的動(dòng)強(qiáng)度為粉粒含量為0時(shí)的1/2。動(dòng)強(qiáng)度在粉粒含量為6%~9%時(shí)降低幅度出現(xiàn)突變,相同破壞振次下,降低幅度約為22%。吹填粉細(xì)砂抗液化強(qiáng)度并不是隨著黏粒含量的增加而單調(diào)增加的,臨界黏粒含量值為12%。初始相對(duì)密實(shí)度對(duì)吹填粉細(xì)砂動(dòng)強(qiáng)度影響較小。固結(jié)應(yīng)力小于200 k Pa時(shí),吹填粉細(xì)砂動(dòng)強(qiáng)度隨固結(jié)應(yīng)力的增加而增加;大于200 k Pa時(shí),試樣已接近最小孔隙比,增加固結(jié)應(yīng)力已不能增大試樣密實(shí)度,動(dòng)強(qiáng)度不再增加。當(dāng)固結(jié)比小于2時(shí),吹填粉細(xì)砂動(dòng)強(qiáng)度隨固結(jié)應(yīng)力比的增加而增加。
[Abstract]:Based on the dynamic triaxial test, the effect of silt content, clay content, initial relative compactness and consolidation stress ratio on the dynamic strength of silty sand in the eastern economic belt of Shantou was studied by means of dynamic triaxial test. The results show that the dynamic strength of fine sand decreases with the increase of silt content, and the dynamic strength of silt is 1 / 2 of that of 0 when the damage vibration frequency is the same. When the content of powder is 6 ~ 9, the dynamic strength has a sudden change in decreasing amplitude, and under the same damage vibration times, the decreasing amplitude is about 22. The liquefaction resistance of fine sand is not monotonously increased with the increase of clay content, and the critical clay content is 12. The initial relative compactness has little effect on the dynamic strength of fine sand. When the consolidation stress is less than 200 KPA, the dynamic strength of the fine sand increases with the increase of the consolidation stress, and when the consolidation stress is greater than 200 KPA, the specimen is close to the minimum void ratio, the compactness of the specimen can not be increased by increasing the consolidation stress, and the dynamic strength is no longer increased. When the consolidation ratio is less than 2, the dynamic strength of fine sand increases with the increase of consolidation stress ratio.
【作者單位】： 中交交通基礎(chǔ)工程環(huán)保與安全重點(diǎn)實(shí)驗(yàn)室;中交四航工程研究院有限公司;中交四航局港灣工程設(shè)計(jì)院有限公司;
【分類號(hào)】：P75;TU41
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本文編號(hào)：2034483