淺談佛山一環的軟基處理.rar

淺談佛山一環的軟基處理
【摘   要】文章敘述了佛山一環軟基處理試驗段的試驗方案及其試驗數據分析，并提出了幾種常用軟基處理方法在該一級路使用時的適用條件及一些新工藝使用簡介與展望。
　　【關鍵詞】試驗段；軟基處理；水載法；電滲
  
      一、前言：軟基處理的必需性
　　佛山市擬建設環城公路主干線（簡稱佛山一環）為一級公路兼城市快速路。地理位置處于珠江三角洲地區，沿線范圍內普遍分布有軟土地基，該類軟土具有含水量、壓縮性高、滲透性低、天然強度低的特點，是典型的珠江三角洲地區軟土。因此，在建設高等級公路時，必須進行軟基加固處理。
      按照工可階段的設想，本工程路基項目的施工期僅為1年左右，相比其他珠江三角洲地區高速公路建設的經驗（合理工期應不少于18個月），本工程工期顯得較緊。
      本工程的路基寬度大（包括綠化帶約120m～150m），而且要求的質量標準高于一般公路工程（特別是工后沉降標準）。存在路基橫向排水難度大、汽車荷載的影響深度大等特點。
　　二、試驗段軟基處理方案介紹
　　（一）試驗段概況。為了摸清本路段軟基處理的工程參數，建設單位有針對性地設置了佛山一環軟基處理試驗段，并邀請廣東省航盛工程有限公司巖土分公司進行本試驗段研究工作。
     本試驗段選址在樁號K11+880～K12+270處。路基長390m，寬120m。
      工可勘察資料和補充勘察資料表明，本段非水塘路段表層普遍存在1m左右的硬殼層或耕植土層，軟土層包括淤泥、淤泥質土、淤泥質砂層等。軟土（淤泥、淤泥質土等）厚度較均勻，厚度約7.5～10m。部分路段軟土層夾薄砂層較多或含砂量較大。軟土有機質含量較少，約1.34～2.65%。軟土層下普遍下臥砂層。部分路段砂層下面分布一層淤泥質粘土，如最近的鉆探表明，K12+015附近的鉆孔表明，18～32m深度范圍內存在淤泥質粘土層。標貫試驗表明，研究段的砂層為非液化砂層。地下水對混凝土、鋼筋無腐蝕性。
　　（二）軟基處理方案選擇。地基處理方案的選擇受軟土空間分
Foshan, a ring of soft ground
Abstract Foshan part article describes the test section of soft ground and the pilot program test data analysis, and proposed several common methods of soft ground level road use in the conditions of application and use of new technology introduction and Prospect.
Key words test section; soft ground; water-borne method; electro-osmotic
   
      I. Introduction: the necessity Soft
Foshan main road to be built ring (the part of Foshan) for a highway and urban expressway. Location in the Pearl River Delta region, along the general distribution within the soft soil of the soft soil with water content, high compressibility, low permeability, low strength characteristics of the natural, is typical of the Pearl River Delta region of soft soil. Therefore, highway construction, the need for soft soil treatment.
      In accordance with the stages of work can be envisaged, this project embankment construction project is only one of about a year, compared to other highway construction experience in the Pearl River Delta region (a reasonable period of not less than 18 months), duration of the project appear more compact .
      The project's foundation is wide (including the green belt of about 120m ~ 150m), and the required quality standards higher than the road works (particularly the settlement after the standard). Horizontal subgrade drainage difficult existence, car loads of great depth and so on.
Second, test program description section of soft ground
(A) of the test section profile. To find out the road the treatment of soft engineering parameters, the construction unit to set a targeted part of Foshan Soft test section and invite Air Shing Engineering Co., Ltd. Guangdong Branch to conduct geotechnical studies of the test section.
     The test section is located in the Stake K11 +880 ~ K12 +270 office. Embankment length 390m, width 120m.
      Survey data and additional work to survey data show that non-reservoir sections in this paragraph about the hard shell surface layer of common 1m or Cultivate soil, soft soil, including mud, silty soil, silty sand and so on. Soft soil (silt, silty soil, etc.) than the thickness of uniform thickness of about 7.5 ~ 10m. Thin sections of soft soil folder large amount of sand more or sand. Soft soil organic matter content less, about 1.34 ~ 2.65%. Soft soil under the common underlying sand. The following sections of the distribution layer of sand silt clay, such as the recent drilling shows, K12 +015 in the vicinity of the borehole show that, 18 ~ 32m depth range of memory in the silt clay layer. Standard penetration test showed that non-liquefaction of sand sand section. Groundwater on the concrete, steel non-corrosive.
(B) of the soft ground treatment scheme. Ground Treatment options by the soft soil spatial
 

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