泵站外江围堰施工工艺要点

1.施工准备

围堰(yan)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)要(yao)(yao)求(qiu)在(zai)44d内完成，须预(yu)(yu)先做(zuo)(zuo)好(hao)(hao)(hao)人(ren)员(yuan)(yuan)(yuan)(yuan)、技(ji)术、材(cai)料、现(xian)场等(deng)(deng)准备工(gong)(gong)(gong)(gong)(gong)作(zuo)，避免(mian)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)中间环(huan)节的资(zi)源浪(lang)费情况(kuang)。配置(zhi)人(ren)员(yuan)(yuan)(yuan)(yuan)包括(kuo)技(ji)术人(ren)员(yuan)(yuan)(yuan)(yuan)、生产人(ren)员(yuan)(yuan)(yuan)(yuan)，专(zhuan)业施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)班组，做(zuo)(zuo)好(hao)(hao)(hao)人(ren)员(yuan)(yuan)(yuan)(yuan)配置(zhi)工(gong)(gong)(gong)(gong)(gong)作(zuo)后，组织(zhi)参(can)与人(ren)员(yuan)(yuan)(yuan)(yuan)熟悉(xi)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)图纸，明(ming)确施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)的重点、难点，并对施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)人(ren)员(yuan)(yuan)(yuan)(yuan)做(zuo)(zuo)好(hao)(hao)(hao)方案交(jiao)底。外江围堰(yan)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)会受到环(huan)境因素(su)影(ying)响，施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)期间需(xu)考虑江水(shui)水(shui)位变化(hua)、环(huan)境气候变化(hua)对现(xian)场施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)产生的影(ying)响。在(zai)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)现(xian)场平整场地，用(yong)(yong)于施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)材(cai)料堆放。按(an)照施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)设(she)计的标准要(yao)(yao)求(qiu)，共计需(xu)要(yao)(yao)使用(yong)(yong)土(tu)工(gong)(gong)(gong)(gong)(gong)布1.6万m2、牛皮砂4万m3、土(tu)工(gong)(gong)(gong)(gong)(gong)格栅1万m3、袋(dai)装砂0.54万m3，需(xu)提(ti)前(qian)做(zuo)(zuo)好(hao)(hao)(hao)材(cai)料的供应工(gong)(gong)(gong)(gong)(gong)作(zuo)，入(ru)场材(cai)料需(xu)提(ti)前(qian)抽检(jian)，检(jian)验合格后方可(ke)使用(yong)(yong)。机(ji)(ji)(ji)械设(she)备也(ye)应准备良(liang)好(hao)(hao)(hao)，确定(ding)好(hao)(hao)(hao)设(she)备的参(can)数、型号(hao)，预(yu)(yu)先检(jian)查投(tou)入(ru)机(ji)(ji)(ji)械的状况(kuang)，检(jian)查结果良(liang)好(hao)(hao)(hao)后方可(ke)投(tou)入(ru)使用(yong)(yong)，投(tou)入(ru)使用(yong)(yong)设(she)备包括(kuo)泥浆泵、全站仪、水(shui)准仪、装载(zai)机(ji)(ji)(ji)、挖掘机(ji)(ji)(ji)等(deng)(deng)。

2.放样测量

围堰(yan)施(shi)(shi)工对(dui)质(zhi)量(liang)要(yao)求较高(gao)(gao)，需(xu)(xu)要(yao)严(yan)格(ge)按(an)照(zhao)参数控制(zhi)(zhi)，避(bi)免工程误差产(chan)(chan)生(sheng)。因此，施(shi)(shi)工前期需(xu)(xu)做好放样(yang)测量(liang)作(zuo)(zuo)业，派遣(qian)专(zhuan)业能(neng)力较强的(de)员(yuan)工，沿轴(zhou)线复(fu)核，对(dui)比施(shi)(shi)工图纸(zhi)内(nei)容，确(que)定(ding)具体(ti)的(de)施(shi)(shi)工位(wei)置(zhi)(zhi)，标(biao)记围堰(yan)填筑高(gao)(gao)度等相关参数。测量(liang)期间(jian)使用(yong)(yong)全站仪、经纬仪，确(que)定(ding)平台控制(zhi)(zhi)点，利(li)用(yong)(yong)全球定(ding)位(wei)技术，确(que)定(ding)施(shi)(shi)工轴(zhou)线控制(zhi)(zhi)点位(wei)，加(jia)设(she)标(biao)杆用(yong)(yong)于标(biao)示，河床高(gao)(gao)程测量(liang)则(ze)使用(yong)(yong)水位(wei)仪器等。水位(wei)高(gao)(gao)程测量(liang)需(xu)(xu)在(zai)砂垫层施(shi)(shi)工前进行，测量(liang)后(hou)由(you)监理人员(yuan)确(que)认签(qian)字。断面布(bu)(bu)置(zhi)(zhi)则(ze)以20m为一(yi)个(ge)(ge)(ge)单位(wei)，每(mei)2m布(bu)(bu)设(she)一(yi)个(ge)(ge)(ge)测点，完成测量(liang)后(hou)配(pei)置(zhi)(zhi)校核断面，共计3个(ge)(ge)(ge)，间(jian)隔(ge)为5m。围堰(yan)轴(zhou)线定(ding)位(wei)则(ze)需(xu)(xu)严(yan)格(ge)明确(que)具体(ti)的(de)起点、拐点、终点，插入钢管作(zuo)(zuo)为标(biao)志，间(jian)隔(ge)控制(zhi)(zhi)在(zai)20m左右，结构(gou)层区域则(ze)在(zai)每(mei)间(jian)隔(ge)30m位(wei)置(zhi)(zhi)设(she)置(zhi)(zhi)标(biao)志，立(li)膜袋(dai)标(biao)杆，确(que)定(ding)标(biao)高(gao)(gao)。整(zheng)个(ge)(ge)(ge)施(shi)(shi)工过程中，为了避(bi)免位(wei)移(yi)、沉降(jiang)等问(wen)题产(chan)(chan)生(sheng)，共计设(she)置(zhi)(zhi)永久观测点3个(ge)(ge)(ge)。