【正文】 目前國內(nèi)多數(shù)應(yīng)用容許應(yīng)力法設(shè)計(jì)擋土墻。本工程將采用俯斜式擋土墻，常用的重力式擋土墻，一般由墻身、基礎(chǔ)、排水設(shè)施和沉降、伸縮縫等幾部分組成。本工程中出現(xiàn)的岸坡破壞類型幾乎全為此形式，當(dāng)然，凍融風(fēng)化，雨水沖刷的破壞也不能忽略?？梢?，當(dāng)大氣降水率大于邊坡土體的人滲率時(shí)，降雨人滲對邊坡穩(wěn)定的影響較大。將第4 層土重度增加少許，應(yīng)用畢肖普條分法法分別計(jì)算， k 值只相應(yīng)減小微乎其微。 地下水地下水對邊坡穩(wěn)定的影響主要與其不穩(wěn)定滲流有關(guān)。雙層結(jié)構(gòu)根據(jù)坡體各土層組合情況又可分為以下兩種：① 腳槽基礎(chǔ)為粘性土，坡體為粘性土夾砂性土，抗沖刷能力和岸坡穩(wěn)定性次之；② 坡體為粘性土夾砂性土，腳槽基礎(chǔ)為砂性土，抗沖刷能力最弱，岸坡穩(wěn)定性最差。第四節(jié) 影響岸坡穩(wěn)定的因素分析影響岸坡穩(wěn)定的因素有內(nèi)因和外因兩個(gè)方面。其中：s siiii Fm???tancos???iiisQWK)(以下為用 bishop 條分法所做的岸坡穩(wěn)定性分析表格計(jì)算，假設(shè) =. sF1 2 3 4 5 6 7 8 9 10 11 12 13　im?　iK土條 編號土條寬(m)i?(176。把滑動(dòng)土體當(dāng)成一個(gè)剛體，滑動(dòng)土體的重量 W，將使土體繞圓心 O 旋轉(zhuǎn)，滑動(dòng)力矩為 Ms＝W d。第一節(jié) 岸坡穩(wěn)定性驗(yàn)算參數(shù)勘區(qū)航道沿線的護(hù)岸在不同程度上均有破壞、損毀，其主要原因除為人類活動(dòng)、船行波、軟土地基以外，護(hù)岸基底土體抗沖能力較差，在船行波沖刷淘蝕作用下，易發(fā)生岸坡崩塌及淺層滑坡等不良物理地質(zhì)現(xiàn)象，特別是護(hù)岸基礎(chǔ)施工時(shí)對邊坡穩(wěn)定有不利影響,故須進(jìn)行邊坡穩(wěn)定性驗(yàn)算，建議采用下表推薦值:　　 邊坡穩(wěn)定性驗(yàn)算土性指標(biāo)推薦值快 剪 固 剪單元土體名稱及編號天然重度（KN/m 3） C(Kpa) Ф( 度) C(Kpa) Ф( 度)②粉質(zhì)粘土及粘土 16 6 12 13③淤泥及淤泥質(zhì)粉質(zhì)粘土 6 3 11 7③1 粉質(zhì)粘土 11 9 13 15③2 粉砂 / 25 10 28③3 粉土 / / / /④粘土及粉質(zhì)粘土 30 13 37 15④1 粉細(xì)砂 / / / /④3 粉土 10 24 / /④4 淤泥質(zhì)粉質(zhì)粘土 / / / /I 區(qū)⑤粘土及粉質(zhì)粘土 45 12 40 15②粉質(zhì)粘土及粘土 5 18 13③淤泥及淤泥質(zhì)粉質(zhì)粘土 9 3 9 8③1 粉質(zhì)粘土 11 3 10 16③2 粉砂 5 26 6 28④粘土及粉質(zhì)粘土 32 11 24 14④1 粉細(xì)砂 / / 6 33④2 中粗礫砂 / / / /④3 粉土 12 25 6 27④4 淤泥質(zhì)粉質(zhì)粘土 20 7 15 14Ⅱ區(qū)⑤粘土及粉質(zhì)粘土 36 15 22 17②粉質(zhì)粘土及粘土 13 8 16 14③淤泥及淤泥質(zhì)粉質(zhì)粘土 10 3 11 8④粘土及粉質(zhì)粘土 40 13 20 16④1 粉細(xì)砂 / / / /④3 粉土 / / / /④4 淤泥質(zhì)粉質(zhì)粘土 / / / /Ⅲ區(qū)⑤粘土及粉質(zhì)粘土 40 15 28 15第二節(jié) 護(hù)岸上的作用分類護(hù)岸上的作用可分為下列三類:(1)永久作用:自重力、土重力、靜水壓力、浮托力、由永久作用引起的土壓力和剩余水壓力等。⑤粘土及粉質(zhì)粘土（Q 4al ）： 褐黃色混灰綠色，含云母、鐵錳質(zhì)結(jié)核及鈣質(zhì)膠結(jié)塊，刀切較光滑，一般呈硬塑～可塑狀態(tài)，平均埋深 米，揭示平均層厚 米，大部分鉆孔該層未揭穿。16 號橫剖圖所在位置的地質(zhì)層及亞層的土性特征分述如下：②粉質(zhì)粘土及粘土（Q 4al ）：黃褐色、褐色，濕～飽和，一般呈可塑狀態(tài)，局部硬塑，混砂，含云母及鐵錳氧化物，較多植物根系及腐植質(zhì)，高壓縮性，低強(qiáng)度，為地表硬殼層，～ 米，平均層厚 米。根據(jù)本次勘察地質(zhì)調(diào)查發(fā)現(xiàn)，航道沿線的不良地質(zhì)作用主要有：坍塌、不均勻沉降、地震效應(yīng)等，分述如下： 坍塌據(jù)航道沿線的地質(zhì)調(diào)查發(fā)現(xiàn)，本段航道沿線兩岸植被較為發(fā)育，部分航段岸邊發(fā)育有較多的蘆葦，在植被不發(fā)育的局部航段，岸坡存在坍塌現(xiàn)象，規(guī)模相對較小，長度在 300米以內(nèi)，范圍分布在自然土坡堤岸的沿線，坍塌類型主要有船行波淘蝕作用、船舶作業(yè)撞擊作用、人類活動(dòng)使上部荷載壓載損毀等，產(chǎn)生坍塌現(xiàn)象的主要原因，是由于自然土坡堤岸未進(jìn)行岸坡護(hù)理，組成岸坡的土體強(qiáng)度太弱，抗沖能力差造成的。該含水層與航道河水相通，兩者之間水力聯(lián)系密切。第四節(jié) 水文地質(zhì)條件勘區(qū)附近海域?yàn)椴徽?guī)半日潮，在自然條件下，河道的感潮河段較長，農(nóng)田受海水倒灌的影響，大多為鹽堿地，但興修水利工程后，一般情況下已不受海水倒灌的影響，河道水位基本上受制于人工調(diào)節(jié)，水面與岸坡頂部的高差基本上維持在 0。③1 粉質(zhì)粘土（ Q4al）：灰～褐灰色，局部灰黑色，飽和，流塑狀態(tài)，含云母，少量貝殼及腐植物，局部混砂團(tuán)。根據(jù)國家標(biāo)準(zhǔn)《建筑抗震設(shè)計(jì)規(guī)范》 （GB500112022）及 《中國地震動(dòng)參數(shù)區(qū)劃圖》（GB183062022） ，勘區(qū)的地震動(dòng)反應(yīng)譜特征周期為 ，地震動(dòng)峰值加速度為 ，設(shè)計(jì)分組為第三組，按該標(biāo)準(zhǔn)附錄 D“關(guān)于地震基本烈度向地震動(dòng)參數(shù)過渡的說明 ”，本區(qū)的地震動(dòng)參數(shù)對應(yīng)的地震基本烈度為Ⅶ度。第二節(jié) 區(qū)域地質(zhì)構(gòu)造及地震 區(qū)域地質(zhì)構(gòu)造受地質(zhì)構(gòu)造控制，連云港地區(qū)的山體一般為西北角翹起，東南坡平緩，山體巖性基本上由變質(zhì)巖組成。氣象特征如下： 水文連云港港疏港航道北起燒香河老閘以西600m處（中云臺物流園區(qū)規(guī)劃東邊界），沿?zé)愫酉蛭髂稀猎粕坪咏粎R處進(jìn)入云善河向南→至云善河閘處向西南至善南閘→進(jìn)入鹽河向南→流經(jīng)灌云縣城→穿過新沂河→至灌南縣鹽灌船閘引航道與鹽河交汊處，航道工程全，匯入黃海；唯鹽河、云善河呈南北走向，溝通其它各河道。48′，北緯 34176。本人于 2022 年 9 月份有幸在此項(xiàng)目中實(shí)習(xí)，對本工程段的各方面情況有基本的了解，認(rèn)識到本工程的最終目的是河道疏浚，也了解到在對待護(hù)岸工程的方案上，大家各有不同的傾向，從不同的角度來看，各種方案都有其合理性。關(guān)鍵詞：河道疏浚 護(hù)岸工程 岸坡穩(wěn)定性 畢肖普條分法 迭代實(shí)現(xiàn) 理正軟件 擋土墻設(shè)計(jì)ABSTRACTLianyungang port is delta main ports and Jiangsu largest seaport, it is the most economical and convenient in North and Midwest to the sea, the new Eurasian Continental Bridge bridgehead, is a hinterland container transport between Asia and Europebased and assume an important international container transit port land and water transport. With economic development, the shipping industry in Lianyungang, will have greater evelopment. In this process, channel dredging will be a problem that we have to face. River dredging must consider all aspects of the factors. This article focuses mainly on river cleanup of the bank slope engineering.This article begins with talk of the Lianyungang location, geography, meteorology and hydrology,on the project in Lianyungang, the importance of river dredging done in the brief talked about some of the bank protection works topography, regional geological structure, stratigraphy, hydrogeology, engineering geological conditions, etc, in order to lay the foundation for further the fourth chapter, discusses on some of the geotechnical characteristics of bank protection on the part of the rock revetment was layered description, a preliminary discussion of some of the new revetment and sea delivery system structural characteristics of each shore part of the geotechnical characteristics of households to discuss and clarify the existence of the bank protection engineering geological problems, specifically the later chapters to solve the the fifth chapter,we entered design of bank protection works, talking about the design of bank protection works, including an engineering design based on revetment bank protection engineering design specifications and use of of the revetment slope stability analysis in the importance of engineering design,Chapter VI of this paper are listed in a separate slope stability was devoted, by Bishop slice method slope stability analysis,and then analyzed the factors that affect slope VII of the discussion focused on the design of retaining walls, first discussed the retaining wall according to survey data of the type, materials used, more, I use software to design retaining then do a series with the theoretical formula checking, checking all the results meet the requirements. Finally,the design of the settlement joint and drainage facilities was given.Core part of this article is part of the project through the revetment discusses the geological conditions,when the proposed dredging the river bank slope stability problems, and triggered a series of engineering geological problems, then these questions do focus on the main part of the analysis and stability analysis and design of retaining walls are used theoretical calculations and the reasons are a bination of software.Keywords：Channel dredging Bank protection works Bank Stability Bishop slice method Retaining Wall Iteration目錄第一章 緒論 ...................................................................................................................................1第二章 自然地理?xiàng)l件 ............................................................................................................