fx雅砻江锦屏二级电站模萨沟沟水处理改建工程实施性施工组织设计.doc
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1、Gay is now a provincial key construction project of aluminum Ltd-province with an annual output of 50,000 tons of technical innovation project of environmental protection and energy saving of electrolytic aluminum project manager. In this technological transformation projects, he has overall respons
2、ibility for the day-to-day affairs of the project. In order to ensure that southern companys control the scale of investment, strengthen field management, pay special attention to project progress, and ensure a successful operation, the overall goal. He and Engineering Department under the leadershi
3、p of all the staff in the companys technical command, on the difficulties and to overcome technical difficulties in the process, work hard, have made outstanding achievements, mainly reflected in the following aspects: first, careful organization and management achieved remarkable results. Technical
4、 innovation project of the year, started and completed a series of bids and completed to date, from production engineering to put into production after nearly a year, has achieved very significant results. A project first 56 slots from dismantling the old slot just 168 days, civil engineering, insta
5、llation, commissioning, guarantee engineering quality under the premise, on the production side transformation under difficult conditions, created the national industrys fastest speeds. II 32 large prebaked electrolytic cell on November 7 has been installed, marks has an annual production capacity o
6、f 50,000 tons of electrolytic aluminum production capacity of aluminum. Entire project almost 8 months earlier than planned, achieved the goal of production transformation benefits that year, created favorable conditions for aluminum through South. Second, effectively control the investment. Project
7、 is subject to a scientific approach to bidding, bidding to make savings of 20 million Yuan, in the implementation process of the project, every domestic prices of steel, cement and other building materials, the old buildings on the base encountered great difficulties in dealing with significant inc
8、rease in the volume of civil engineering, but through rationalization and optimization, project control in fixed investment of 350 million Yuan. Third, environmental energy-saving effect of the project. Project investment of nearly 30 million Yuan, using large prebake technology and aluminum oxide d
9、ense phase and hyper dense phase conveying technology, fluoride and other harmful gases purification efficiency of up to 98%. Compared with Soderberg cell before the modification, power consumption can be reduced by 1500 tons of electrolytic aluminum, and project environmental protection and energy
10、saving effect is obvious. Four are in a relatively short period of time to the normal production. After four months of efforts, a project has put into operation all the 54 240KA large cell into regular production, stable current channel conditions and all the economic indicators are good, current ef
11、ficiency in October had reached 93%, is close to and reach the domestic advanced level. In the case of production half of the cell, this effect can be achieved and better level in the industry. 50,000 tons of electrolytic modification process, from preliminary study to equipment selection, cost cont
12、rol, project progress, quality control and coordination among the various sub-projects and various professional, technical command under the correct leadership, both from an overall perspective, emphasis on integrity, and earnestly implement the relevant laws and regulations, strictly act according
13、to the contract. He tried to learn relevant knowledge, good style of business, operational and organizational coordination ability, project efficiency, quality and safety assurance system in place, with all units involved with the coordination and good .雅砻江锦屏二级电站模萨沟沟水处理改建工程实施性施工组织设计第一章 施工总布置设计说明1.1编
14、制依据1、雅砻江锦屏二级水电站模萨沟沟水处理改建工程施工招标文件第卷、第卷、第卷;2、雅砻江锦屏二级水电站模萨沟沟水处理改建工程施工招标文件补遗第一号;3、招标单位组织的现场考察所得资料;4、国家有关行业标准及水利部现行标准及规范;5、我单位施工类似工程的相关经验。1.2工程概况1.2.1 设计概况本工程是保证雅砻江锦屏工程东端模萨沟弃渣场渣体稳定、水土保持和环境保护所建,将老庄子泉和模萨沟流域的洪水直接排泄至雅砻江,是电站建设的关键性辅助工程,包括新建排水隧洞(长1325.0m、石方洞挖方5.5万m3,喷射混凝土963m3,混凝土1.2万m3)、原排水洞出口端封堵和三股水便道交通洞及其他临时
15、设施项目。新建排水隧洞连接段选在距原排水洞出口约504m,桩号“排0+760.983m”处,连接段进口底板高程EL1603.12m。新建隧洞平面上呈折线布置,起始部分和原排水洞夹角44.94,按方位角N7.5W布置,通过一转弯半径100m,转折角29.5的弯道转为N25E,尾部和出口段采用一 转弯半径80m,转折角60的弯道连接。新建隧洞长1334.60m,纵向坡度3%、出口段为10%,隧洞过水断面均为6.56.0m(bh)的城门洞型,顶拱和侧墙采用喷锚支护,底部混凝土抹平,局部围岩破碎洞段和进出洞口位置采用全断面钢筋混凝土衬砌。新建排水隧洞设计流量下均为无压明流。隧洞出口位于三股水陡崖上,长
16、约75m,其中起始25m为渐扩段,洞宽由6.5m扩大到9.0m,以缩小出口流速。渐扩段后为调整段和出洞口,出洞口底板高程约1563.19m。水流出洞后以瀑布形式下泄至三股水沟谷并流入雅砻江。新建排水洞建成后,原排水洞出口段500余米和原泄槽即失去功能。在原排水洞和新建排水洞交叉口处设置混凝土堵头,堵头长约6.0m,采用C20混凝土浇筑,顶拱进行回填灌浆,周边进行固结灌浆以防止过大的渗漏。为保证原排水洞洞口取水需要,堵头底部布置一直径供水钢管,接至原排水洞洞口取水管。并在新建排水洞洞口设一挡水坎,以雍高水深,满足枯水季节取水的需要。挡水坎高约1m,顶宽2m,尾部以1:3的斜坡与新建排水洞底板连接
17、。为避开泄水对原有地方道路的影响,在泄水点附近开挖三股泉交通洞绕行,该交通洞长209m,断面为3.03.0m(bh)的城门洞型。1.2.1.1主要工程内容1、主要工程项目包括:新建排水隧洞、原排水洞交叉端封堵和三股水交通洞等工程项目。2、主要工程数量如下表:表1.2-1 主要工程数量一览表序号项 目单位数量备 注1隧洞开挖工程1.1土方明挖m3420交通洞进出口1.2石方明挖m31801.1石方洞挖m3550852支护及排水工程2.1喷C25素砼m3965厚520cm2.2挂钢筋网t146.515*15cm2.3普通砂浆锚杆22,L=3.0m根55972.4普通砂浆锚杆25,L=4.5m根31
18、072.5普通砂浆锚杆28,L=6.0m根1142.6钢格栅制作及安装t282.7排水孔m3206直径50 m m,L=2.0m3混凝土工程3.1洞内C25模筑衬砌混凝土m369613.2洞内C25底板衬砌混凝土m312373.3钢管支墩混凝土C20m31013.4封堵混凝土C20m32633.5护坡混凝土C20m335203.6素混凝土C15m333混凝土垫层3.7钢筋t2783.8PVC止水带M550653型4钻孔及灌浆4.1衬砌混凝土回填灌浆m313044.2衬砌混凝土固结灌浆m314945砌体及防护工程5.1浆砌块石M10m318385.2干砌块石m32105.3钢筋石笼m32206钢
19、管安装工程6.1螺旋缝焊接钢管m20直径529mm,厚6mm6.2蝶阀DN500个11Mpa1.2.2工程地质及水文气象1.2.2.1水文气象条件雅砻江流域属川西高原气候区,主要受高空西风环流和西南季风影响。干湿季节分明,每年11月至次年4月为干季,日照多、湿度小,日温差大,降水极少,只占年雨量的510%;510月雨季,气候湿润,降雨集中,占全年雨量的9095%。流域内气温由北向南呈增高趋势,降雨量自西北向东南递增。根据厂区大水沟站的观测资料统计,多年平均降水量为955.9mm,降雨主要集中在59月,约占全年85.4%,多年平均雨日为153.8天,59月占全年降水日数的67.6%,多年平均气温
20、为18.1。本流域径流主要来源于降水,径流的年内变化与降水的变化趋势基本一致。根据泸宁水文站资料,历年实测最大流量为8680m/s(1954年8月2日),实测最小流量为271m/s(1985年2月11日),历年年水位变幅为7至12m。径流年内分配按补给情况可大致分为:丰水期611月,主要为降水补给,水量约占全年的81.5%;枯水期12月至次年5月,为地下水补给,水量约占全年的18.5%。1工程地质条件新建排水洞洞向N25E,沿线地形陡峻,坡角一般均大于45,大于80至垂直陡壁随处可见,常见有高差大于100m的基岩或角砾岩陡壁,可见大小不等的溶蚀孔洞,小者110mm,大者呈溶蚀洞穴,出口段位于三
21、股水第一股水处,隧洞出口处基岩裸露,为高度达百米的基岩陡壁,平均为63,基岩完整性较好。工程区主要出露上古生界上二叠统峨眉山玄武岩组、宣威组,中生界三叠系中统盐塘组(T2y3-4)、白山组(T2b)及上统(T312)、第四系覆盖层。现自老至新分述如下:(1)峨眉山玄武岩组(P2)分布于模萨沟口及厂房一带,岩性为灰绿浅绿色变玄武岩、片理化变玄武岩,玄武岩中局部具明显的气孔及杏仁状构造,气孔被压扁呈定向排列。顶部有0.42m厚的绿灰色变火山角砾凝灰岩、紫红色变基性凝灰岩。(2)宣威组(P2x)分布于一股水至模萨沟一带,呈NNE向带状展布。下部岩性为灰黄灰浅绿灰色中至厚层状变细粒岩屑杂砂岩、长英砂岩
22、、板岩,中部见厚约20m的灰色中厚层粉晶大理岩夹少量黄灰色板岩,上部为黄绿灰色中厚层状变岩屑杂砂岩夹同色变粉砂岩及板岩,顶部见黄灰色中晶大理岩、绢云条带大理岩。变砂岩、变粉砂岩及板岩层理清晰。东侧与上二叠统峨眉山玄武岩组(P2)及中三叠统盐塘组大理岩呈断层接触,西侧与中三叠统白山组(T2b)亦呈断层接触。厚约370m。(3)上三迭统(T3)工程区内仅见(T312),分布于模萨沟坝址及隧洞线以西,呈南北向展布,所见为一套连续沉积的青灰色中厚层状变中、细粒长英砂岩夹薄层砂质板岩,富含钙质和黄铁矿晶体;黑色板岩夹少量深灰色细砂岩或粉砂质板岩,层理清晰,含黄铁矿晶体,工程区内与下伏白山组呈整合接触。层
23、厚分别为200 m和175m。(4)新生界工程区广布着新生界堆积物,以崩坡积物和冲洪积物为主,厚度数米至数十米,覆盖于基岩之上。角砾岩:由崩坡积物滚块石经钙华胶结而成,工程区模萨沟内及雅砻江岸坡可见厚度大于20m以上,连片发育在模萨沟至一股水间雅砻江右岸,形成独特的角砾岩陡壁,在模萨沟两侧沟坡也能见到长数10米至100余米的角砾岩岩壁。残、坡、崩积物:残、坡积物大多为壤土夹碎块石,其厚度随地形坡度而异,陡处薄缓处厚。崩积物主要分布于悬崖陡壁下,常在山麓和沟侧形成崩坍倒石堆,在模萨沟坝址下游右岸见有厚度达20m以上的崩坍堆积物,块径悬殊,以0.51m居多。第一股水至第三股水间白山组大理岩陡壁下发
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