發(fā)布時間：2018-05-22 18:11

  本文選題：湖泊相軟土地基 + 離心模型試驗��； 參考：《河北工業(yè)大學》2014年碩士論文

【摘要】：湖泊相濕地（或古湖泊相濕地）在我國的南北部地區(qū)廣泛的分布，并形成了沼澤性的濕地軟土或軟粘土。和東部沿海的平原地區(qū)所廣泛分布的軟土有所不同，平原的湖泊濕地地區(qū)的公路軟土地基有它自己較為鮮明的特點，，主要會以兩種形式出現(xiàn)：第一種為分布于河流兩岸的漫灘淤積地帶，另一種為分布于古平原內(nèi)陸湖泊邊緣地帶及一些低洼地區(qū)，即是常說的平原濕地。目前全國有多條高速公路或鐵路穿越過湖泊濕地，該路段的軟土或軟弱土地基，會帶來大量沉降，而且達到沉降穩(wěn)定的時間比較長、使得成本增加以及出現(xiàn)運行期間工程質(zhì)量事故等隱患。 本論文研究對象“邢衡高速”衡水段臨近衡水湖，土體主要由粉土、粘土和粉質(zhì)粘土構(gòu)成，由于粘土層含水率較高，為典型的湖泊相軟土，因而處理方式的選擇成為本項目的主要研究方向。本文通過離心模型試驗的方法，系統(tǒng)研究不同高速公路路基處理方法對本段試驗段公路后期沉降產(chǎn)生的影響，即采用水泥攪拌樁方式和真空堆載聯(lián)合預壓方式處理，并觀測湖泊相軟土地基加固的工后沉降影響情況，進而以此為基礎(chǔ)研究“刑衡高速”衡水段的路基處理方法的選擇。研究結(jié)論對于彌補現(xiàn)行處理方法的不足具有重要的理論意義和工程實用價值，同時對于加快路基土固結(jié)，減少工后沉降具有十分重要的意義。
[Abstract]:The lacustrine wetland (or paleo-lacustrine wetland) is widely distributed in the north and south of China and forms marsh soft soil or soft clay. Different from the soft soil widely distributed in the eastern coastal plain area, the highway soft soil foundation in the plain lake wetland area has its own distinct characteristics. There are two main forms: the first is the floodplain silting zone on both sides of the river, the other is the plain wetland, which is distributed in the edge of the inland lake and some low-lying areas of the ancient plain. At present, there are many highways or railways across the country that have passed through lakes and wetlands. The soft soil or soft soil foundation of this section of the road will bring a great deal of settlement, and it will take a long time for the settlement to stabilize. Causes the cost to increase as well as appears during the operation the project quality accident and so on hidden danger. The research object of this paper is "Xingheng High-speed" Hengshui section near Hengshui Lake, the soil is mainly composed of silt, clay and silty clay, because of the high moisture content of clay layer, it is a typical lacustrine soft soil. Therefore, the choice of processing mode has become the main research direction of this project. In this paper, the influence of different highway subgrade treatment methods on the late settlement of highway in this section is studied systematically by centrifugal model test, that is, cement mixing pile and vacuum surcharge combined preloading are adopted. The influence of post-construction settlement on the reinforcement of lake soft soil foundation is observed, and the choice of subgrade treatment method in Hengshui section of "Criminal Heng Heng High Speed" is studied. The conclusion of the study is of great theoretical significance and engineering practical value to make up for the deficiency of current treatment methods, at the same time, it is of great significance to accelerate the consolidation of subgrade soil and reduce the settlement after construction.
【學位授予單位】：河北工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U416.1

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本文編號：1923115