qf水电站趾板边坡加固处理施工技术.doc
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1、 水电站趾板边坡加固处理施工技术1工程概况吉林台一级水电站工程大坝坝高157m,为混凝土面板砂砾-堆石坝。坝段地处北天山纬向构造带西部的喀什河凹陷中部,V形河谷,走向310,谷坡陡峻,两岸坡度约45,冲沟发育,左右岸各有两个大的冲沟,切割深度4080m;发育有低序次的断层,按产状可分为NW、NE、近EW、近SN向四组,其中以NW向组发育规模较大;坝址卸荷裂隙发育,规模较大对坝址有影响的卸荷裂隙有6条,由于岩层走向和倾角影响,左岸不稳定体以崩塌为主,右岸以塌滑为主。2边坡加固处理技术趾板基础应将表面覆盖层和强风化岩层挖除,使其置于弱风化的岩石上。趾板上方的岩质岸坡按设计边坡1:0.3进行开挖,每
2、高差12m设一级2m宽的马道。开挖施工中对岩石岸坡应及时进行支护处理,以确保施工期和运行期安全。根据趾板岩石边坡开挖后揭露的不利结构面组合和破碎情况,主要采用了采用岩石锚杆、挂网喷砼和预应力锚索等的支护方式。21 锚杆、锚筋桩施工211 钻孔锚杆孔布设呈梅花型,孔、排间距分2m*2m和3m*3m两种,孔深分4.4m和3.9m两种,采用YT28手风钻成孔,孔径42mm。锚筋桩孔也呈梅花型布置,孔、排间距3m*3m,孔深9m,钻孔采用7655D风动凿岩机,孔径90mm。钻孔的倾角、方位角一般根据岩石节理、裂隙和破碎程度的不同而定,基本是垂直于构造产状成孔。212 锚杆、锚筋桩制安锚杆采用I级钢筋,
3、直径25mm,长度分4.5m和4m两种,外露10cm,便于挂网喷护。锚筋桩采用25mm螺纹钢,长度9m,三根焊接组合而成,使用滑轮组起吊,人工配合安装。213 灌浆选用42.5Mpa硅酸盐水泥,W/C=0.35纯水泥浆,用BW-250型泥浆泵注浆,注浆体配合比见表1。表1 注浆体配合比 水泥标号 水灰比(W/C) 注浆体单位材料用量/Kgm-3 水 水泥 减水剂(1.5%) 膨胀剂(10%) 42.5Mpa硅酸盐水泥 0.35 525 1500 22.5 150 22 喷射混凝土施工采用喷锚支护的施工方法,可有效调用岩体自身的强度和自稳能力,避免岩体继续风化、受水流的冲蚀和雨水的进入影响岩体节
4、理和裂隙的发育,并与锚杆相结合,提高岩体的整体抗滑能力。221 喷面清理与挂网喷射前,用高压风水联合冲洗将工作面上的松土、浮石等清理干净。用校直后的8钢筋,按照200mm*200mm的尺寸在岩面编制近似正方形网格,网和岩石面保持3-5cm间距,交结点用22号铁丝捆扎,钢筋网与锚杆外露端头点焊牢固。222 集料拌和选用新鲜的42.5Mpa硅酸盐水泥、中细砂和成熟度较高的砾石,配合比按照灰:砂:石=1:1.76:1.76实施,最大集料直径不超过10mm,采用混凝土搅拌机拌和并确认均匀后方可上机喷射。喷射混凝土配合比见表2。表2 喷射混凝土配合比 水泥标号 水灰比(W/C) 喷射混凝土单位材料用量/
5、Kgmorganization system and working mode, the selection of a number of municipal strengthening group to build innovation and strengthen the organization of the basic level organizations advanced model.(seven) the manual work of the Communist Youth League Organization published and League branch of ma
6、nual work, to promote the use of two manuals in the citys organizations at various levels. The county committee, directly under the group (work) is under the jurisdiction of grassroots League and group (total) using branch ratio shall not be less than 70%.Three, to further strengthen the groups lead
7、ership and team building(a) to strengthen the leagues leadership at all levels of construction. Continue to do a good job of municipal Party Committee Organization Department on the strengthening of the Communist Youth League cadres management opinions implementation. To promote the group counties (
8、autonomous counties, cities) Commission and city directly under the group (workers) appointed to carry out the Five team building activities. Improve the League Association Department working mechanism. Conscientiously fulfill the duties of CO, combined with the city group directly under (the) Commi
9、ttee of the general election and the adjustment, actively jointly with the unit where the party organization department good group leadership selection with the work. Do a good job in municipal Party committee assistant committee leadership and leading cadres of the annual assessment work, adhere to
10、 and improve the assistant secretary of the Communist Youth League talk system group To weave individual conversation and collective conversation, to strengthen the committees of all levels, the Standing Committee of the Standing Committee, the establishment of a sound system of central group learni
11、ng, the system of investigation and study, the system of important issues and the reporting system.(two) to strengthen the work of education and training of cadres to conscientiously implement the Central Committee. On the implementation of grassroots cadres training project and opinions on carrying
12、 out the mission municipal CYL Cadres training project implementation opinions, full implementation of the project of the City Youth League cadres training education. Focus on the county grassroots cadres and workers focused on training, the new school system vocational training League cadres, for t
13、he Municipal Organization Department jointly held the third session of the Communist Youth League system training cadres in party. Focusing on the construction of new socialist countryside, strengthening village cadres and rural construction team group member of the young team, the county organizati
14、ons at various levels throughout the year is expected to train 100 00 rural grassroots cadres, plans to train 1000 village secretary of the village Party branch.(three) actively promote grassroots cadres election work. Under the unified leadership of the party organization, to strengthen grassroots
15、organizations direct work, standardize the election work rules and procedures, in the designated candidate, open competition to democratically elected branch secretary at the same time, actively and steadily the development of Township, streets and other grassroots organizations in the direct electi
16、on of the pilot work, on the basis of summarizing the experience and gradually expand the scope of the pilot, and gradually formed a set of measures and cadres election system.(four) to strengthen the cadres testing exercise. To study the development of XX city from 2006 to 2008 cadres testing exerc
17、ise planning. To select outstanding cadres to the central mission in Beijing, Shanghai, Guangzhou and other central organs and sending work in developed areas. With the Central Committee the implementation of the western region and ethnic minorities cadres training plan . To carry out the eighth bat
18、ch of municipal organs attachment cadre management, selection, training work. The outstanding cadres to start the National Development Bank XX branch testing exercise.(five) to strengthen the group construction. The main position to play the role of Youth League cadre education and training as the c
19、ity, in accordance with the requirements of post training, further curriculum scientifically and rationally, adopt arrangement menu course, basic theory includes group work, focus, hot and difficult issues, to enhance the content and practice; to strengthen the construction of teaching staff, the in
20、tegration of teachers, establish a quality teacher training team, establish and implement course evaluation system; take delivery of training to the countryside, on-site training, and increase the rural grassroots cadres training efforts.Four, efforts to strengthen the work of young talent(a) to ten
21、th XX young 54 medal in recognition of the publicity, and actively explore the XX youth service. 54 Medal of institutionalization, standardization and socialization mechanism. Give full play to the XX award in recognition of 54 youth medal Association, Youth Award winner in the 54 chapter, investiga
22、tion activities. Who won the Youth Service medal, dedication to the society to create conditions, build the stage. During the 54, named in recognition of the tenth XX young 54 medal. The association of XX editing of young talent , the exchange of information and communication platform for the XX of
23、outstanding young talents.(two) the establishment of municipal Party committee of young talent information database. In accordance with the feasible, effective, classification management, implement step by step principle, the establishment of municipal Party committee of youth talent database; guidi
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