【正文】 l lead to greater error. The lateral deformation of Soft soil deformation of elastic deformation includes not only, also contains plastic deformation. Embankment loads, soft soil consolidation process, the lateral deformation also increase gradually, the settlement of soil caused not only the main stress, but also because the soil drainage consolidation in the lateral deformation of the continuous development of. With the size of the lateral deformation of soil properties, soft soil subgrade height, the position of related to such factors. If the settlement calculation don39。 Input layer is reflected embankment sinking The main factors (such as down construction loading method, construction of loading rate, construction intermittent period, the sedimentation value etc.)。 外文原文 Soft soil subgrade settlement calculation problem is discussed Abstract: in the soft soil area build highway, the most important is to control the embankment settlement. Explore soft soil subgrade settlement calculation method, analyzes the influence on settlement, and points out some main factors existing in soft soil subgrade settlement calculation of the difficulties and problems, and finally puts forward some Suggestions. Keywords: soft soil subgrade settlement calculation 1 introduction With the development of social economy, in order to satisfy the requirements, our traffic modernization construction of highspeed road urgently needed. The roadbed uneven settlement will destroy or reduce the quality of highway, affecting driving fort and safety. Built in the soft soil area highway, the most critical issue is control of subgrade settlement. Therefore, highway roadbed subsidence analysis and putation has attracted widespread attention. This paper of soft clay subgrade settlement putation problem is discussed. 2 soft soil subgrade settlement calculation The position of 210 settlement Built in the soft soil area highway roadbed subsidence, must cause. Usually think settlement by the instantaneous settlement, the Lord is with consolidation settlement secondary consolidation settlement of three parts. namely S = Sa + Sd + Se Type: Sd instantaneous settlement, because the lateral deformation of soil caused additional settlement。加載速率對初期沉降有明顯影響，而對后期沉降影響不大。另一方面，當?shù)叵滤缓芨邥r，沉至地下水位以下的填土?xí)艿礁×ψ饔?，?dǎo)致基底附加壓力減少。建立起反映路基沉降影響因素與路基沉量之間的映射關(guān)系的神經(jīng)網(wǎng)絡(luò)后，就可以用已有的沉降觀測資料對網(wǎng)絡(luò)進行學(xué)習(xí)訓(xùn)練，待到網(wǎng)絡(luò)誤差小于預(yù)先設(shè)定值時，網(wǎng)絡(luò)就能夠抽取并記憶填土的力學(xué)性質(zhì)和變形特性，再輸人要進行預(yù)測的加載情況，就可以通過網(wǎng)絡(luò)預(yù)測出將要發(fā)生的沉降變形情況。由于采用豁彈性模型，次固結(jié)的影響可以得到考慮。高速公路軟土路基沉降隨時間的關(guān)系一般較符合雙曲線形式圖。應(yīng)力路徑法對于認識沉降機理，分析常規(guī)計算中可能產(chǎn)生的誤差趨勢，都是很有益的。采用次固結(jié)系數(shù)計算。 Sa— 次固結(jié)沉降，由于土體蠕變而發(fā)生的沉降 。路基的不均勻沉降會破壞或降低高速公路的質(zhì)量，影響行車的舒適性和安全性。在軟土地區(qū)修筑高速公路，最關(guān)鍵的問題就是控制路基的沉降。 由于土體側(cè)向變形引起的那部分沉降，其實并不是瞬時發(fā)生的，它在沉降的整個過程顯示出其影響，對此作了詳細的論證。工程實際中經(jīng)常采用主固結(jié)沉降乘以一個修正系數(shù) m.，的辦法來計算總沉降量。但該法 使用較為麻煩，試驗技術(shù)要求過高，目前尚未被工程界采用。但也有人認為雙曲線方程本身沒有反映出地基土的固結(jié)速度，與沉降速率缺乏內(nèi)在的聯(lián)系，用指數(shù)曲線法擬合更恰當。 人工神經(jīng)網(wǎng)絡(luò)法 人工神經(jīng)網(wǎng)絡(luò)法自 20 世紀 80 年代中后期以來，迅速發(fā)展為一個前沿研究領(lǐng)域，并廣泛應(yīng)用于各 個學(xué)科。神經(jīng)網(wǎng)絡(luò)法預(yù)測沉降尤其適合于只有一些沉降觀測資料而無土性參數(shù)的 J清況，與實測沉降誤差較小，有一定的發(fā)展前景。常規(guī)計算很難考慮這兩方面的影響。填筑速率過快，土體沒有充分固結(jié)，會造成較大的工后沉降。 Sd primary consolidation settlement with jose, is the volume of soil caused by pression deformation of settlement。 Layer of soil mechanics to reflect nature and deformation characteristics (such as soil severely, intensity index and the pression coefficient, permeability, consolidation coefficient, etc.). Establish reflect embankment settlement factors and the amount of roadbed sink the mapping relationship between after the neural work, we can use the existing settlement observational data of work by learning training, s tay to work error is less than previously set value, the work can extract and memorize the filled soil mechanics properties and deformation characteristics, again lose people to loading of predicting, can predict through the work will occur settlement deformation. Nn forecasting set