The study solves engineering problem as follows : ( 1 ) the systematic study on the historical course of xigeda strata deposit and geologic environment includes strata , lithologic characters and constitution et in the liangshan and panzhihua region . the results show that the xichang - panzhihua express way is controlled by the anninghe fault and the xigeda fault , the earthquake frequently happen in the region of pass , the different sedimentation number is more great , they effect the road building , safety in operation and structure belong road ( 2 ) because in some place the xigeda strata is foundation and roadbed , the study on the basic properties of the xigeda strata include density , moisture content plastic and liquid limit graduation . the results show that the xigeda strata is deposition in lake , the main component is mudstone and sandstone , the fine particle is main , it has some viscosity , the moisture content of mudstone is different the it of sandstone , the other property are likeness . the xigeda strata has no dilatation on total , some claystone have low and medium dilatation ; ( 3 ) the study on the basic properties of xigeda filler include the composition of matter the biggest standard dry density , , the optimum moisture content the results show that xigeda filler can use as road material , it is well grade filler and admixture filler on essence , its compaction index should change in different place because the property is controlled by mudstone and sandstone that change is great in different place ; ( 4 ) the study on the xigeda filler craft used as express way roadbed , includes suitable thickness , compaction numbers and methods and equipment choice et 公路沿線廣泛分布有昔格達(dá)地層,昔格達(dá)地層能否用作高速公路路基填料,國(guó)內(nèi)沒有先例,本論文就是結(jié)合導(dǎo)師的科研項(xiàng)目,在非典期間,現(xiàn)場(chǎng)長(zhǎng)達(dá)5個(gè)月的工作,完成了從試驗(yàn)、現(xiàn)場(chǎng)施工工藝到路堤分層沉降監(jiān)測(cè)等工作,是面對(duì)生產(chǎn)實(shí)際,認(rèn)識(shí)昔格達(dá)地層的性質(zhì)和其作為地基、路基和填料應(yīng)用中面臨的問題進(jìn)行的研究。主要的研究?jī)?nèi)容有:對(duì)攀西地區(qū)地層巖性、構(gòu)造等地質(zhì)環(huán)境和昔格達(dá)地層的沉積歷史過程作了系統(tǒng)的分析,研究表明西攀高速公路主要受安寧河斷裂和昔格達(dá)斷裂影響,通過地區(qū)地震活動(dòng)頻繁,差異沉降較大,對(duì)公路建設(shè)、安全運(yùn)行和沿線構(gòu)筑物設(shè)計(jì)有較大影響;由于昔格達(dá)地層在有些路段作為地基、有些作為路基,對(duì)其基本性質(zhì)進(jìn)行了研究:包括天然密度、含水量、塑液限、顆粒級(jí)配等指標(biāo)的試驗(yàn)研究。研究成果表明:昔格達(dá)地層為湖相沉積,主要為砂巖和泥巖,它以細(xì)粒組為主,同時(shí)粘粒的存在,使其具有一定粘性。