【正文】 ......14 ......................................................................................................................................14 .............................................................................................................................15 土釘墻的構(gòu)造 .........................................................................................................................................15 土釘支 護(hù)原理與方案設(shè)計(jì)概則 .............................................................................................................17 土釘支護(hù)原理 .....................................................................................................................................17 土釘方案設(shè)計(jì)的必要條件 .....................................................................................................................20 工程地質(zhì)及區(qū)域地質(zhì) 勘察數(shù)據(jù) .......................................................................................................20 工程條件及周圍環(huán)境 ........................................................................................................................20 確定擬建工程基坑邊壁破壞模式 ...................................................................................................20 工程保養(yǎng)期 .........................................................................................................................................20 基坑邊壁最大允許變形量 ................................................................................................................20 西華大學(xué)畢業(yè)設(shè)計(jì)說明書 現(xiàn)場(chǎng)試驗(yàn)資料 .....................................................................................................................................21 確定邊壁臨界自穩(wěn)高度、臨界自穩(wěn)長(zhǎng)度和臨 界自穩(wěn)時(shí)間 ............................................................21 降雨和疏水條件 ..................................................................................................................................21 監(jiān)控與回饋設(shè)計(jì) ..................................................................................................................................21 土釘墻設(shè)計(jì)的基本程序 ..........................................................................................................................22 非支護(hù)條件下邊壁穩(wěn)定性分析 .........................................................................................................22 計(jì)算確定支護(hù)參數(shù) ..............................................................................................................................22 支護(hù)條件下邊壁穩(wěn)定性校核 ..............................................................................................................22 設(shè)計(jì)注意事項(xiàng) ..........................................................................................................................................23 穩(wěn)定性系數(shù) ...........................................................................................................................................23 拉應(yīng)力 ...................................................................................................................................................23 超前土釘 ...............................................................................................................................................23 預(yù)應(yīng)力土釘 ...........................................................................................................................................24 基坑壁腳移位 ,基礎(chǔ)隆起防治 .............................................................................................................24 附加荷載 ...............................................................................................................................................24 邊壁滑塌防治 .......................................................................................................................................24 水患防治 ...............................................................................................................................................25 4 土釘墻設(shè)計(jì) ............................................................................................................... 26 影響土釘墻設(shè)計(jì)的因素 ..........................................................................................................................26 土釘墻設(shè)計(jì)步驟 ......................................................................................................................................26 土釘設(shè)計(jì)計(jì)算 ........................................................................................................................................27 噴射混凝土面層設(shè)計(jì) ..........................................................................................................................35 土釘墻設(shè)計(jì)和計(jì)算 ..................................................................................................................................36 土釘設(shè)計(jì)計(jì)算 ........................................................................................................................................36 噴射混凝土面層設(shè)計(jì) ..........................................................................................................................45 5 土釘施工工藝和方法 ................................................................................................ 47 6 結(jié)論 ............................................................................................................................. 49 總結(jié)與體會(huì) ..................................................................................................................... 50 西華大學(xué)畢業(yè)設(shè)計(jì)說明書 謝 辭 ............................................................................................................................... 50 【參考文獻(xiàn)】 ................................................................................................................. 52 5 西華大學(xué)畢業(yè)設(shè)計(jì)說明書 四川美術(shù)館新館建設(shè)項(xiàng)目基坑降水及護(hù)壁設(shè)計(jì) 摘 要 土釘墻設(shè)計(jì)中，由于工程 現(xiàn)場(chǎng)下部土層較好，通過朗肯主動(dòng)土壓力計(jì)算確定只需在上層填土部分進(jìn)行土釘墻支護(hù)。 關(guān)鍵詞： 基坑，土釘墻，強(qiáng)度， 穩(wěn)定性 ，排水， 沉降 6 西華大學(xué)畢業(yè)設(shè)計(jì)說明書 The design of foundation pit p