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墩梁固结的措施

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墩梁固结的措施

发布日期:2016-07-27 作者: 点击:

墩梁固给可以采用(yong)临时固结措施(shi),也可从(cong)锚具构造上(shang)考虑(lv),常用(yong)的方法有以下几(ji)种。

  1.加临时锚固(gu)

  利用梁(liang)(liang)与墩(dun)(dun)的(de)(de)(de)双(shuang)排锚(mao)(mao)杆(gan)(gan)承受悬臂(bei)(bei)施(shi)(shi)工中(zhong)(zhong)产生(sheng)的(de)(de)(de)不(bu)平衡弯炬。这种方浮构(gou)造简单,制作和装诉方便(bian),安全可靠。通(tong)常锚(mao)(mao)杆(gan)(gan)的(de)(de)(de)下(xia)蝴(hu)顶埋在(zai)(zai)墩(dun)(dun)内。锚(mao)(mao)杆(gan)(gan)中(zhong)(zhong)段在(zai)(zai)混舞土块中(zhong)(zhong)穿过并(bing)锚(mao)(mao)在(zai)(zai)梁(liang)(liang)顶。锚(mao)(mao)杆(gan)(gan)的(de)(de)(de)致(zhi)呈(cheng)由施(shi)(shi)工弯饭计(ji)算(suan)确定(ding),为便(bian)于拆除,在(zai)(zai)每个混凝土块中(zhong)(zhong)间设有2Omm厚的(de)(de)(de)硫磺砂浆夹层。表示(shi)双(shuang)支(zhi)座墩(dun)(dun)采用临(lin)时(shi)(shi)(shi)锚(mao)(mao)固的(de)(de)(de)构(gou)造,在(zai)(zai)临(lin)时(shi)(shi)(shi)支(zhi)只佗(tuo)附近没有扁千斤顶。便(bian)于施(shi)(shi)工中(zhong)(zhong)的(de)(de)(de)辙调(diao)。表示(shi)单支(zhi)座墩(dun)(dun)上(shang)具有抗(kang)压功(gong)能的(de)(de)(de)临(lin)时(shi)(shi)(shi)固结排施(shi)(shi)。当(dang)桥墩(dun)(dun)上(shang)的(de)(de)(de)两排铭杆(gan)(gan)不(bu)址以抵(di)抗(kang)外4矩时(shi)(shi)(shi),可在(zai)(zai)墩(dun)(dun)两侧(ce)各挑出(chu)一个小刚臂(bei)(bei),锚(mao)(mao)杆(gan)(gan)设在(zai)(zai)刚臂(bei)(bei)上(shang),以增加(jia)抗(kang)弯力臂(bei)(bei)。

  2.利用安装梁增(zeng)加(jia)施工稳定(ding)

  悬(xuan)臂施(shi)(shi)(shi)工(gong)(gong)采(cai)用(yong)(yong)安装(zhuang)梁(liang)或龙门(men)起重(zhong)机时,在桥墩和梁(liang)临时固结(jie)的(de)(de)情况下,可以利用(yong)(yong)安装(zhuang)梁(liang)上的(de)(de)泣杆吊(diao)住(zhu)已施(shi)(shi)(shi)工(gong)(gong)完成的(de)(de)粱段,借以抵抗(kang)悬(xuan)传施(shi)(shi)(shi)工(gong)(gong)带来的(de)(de)不平衡匆矩(ju)。巴西的(de)(de)瑞。尼特朗(Rio-Niteroi)桥用(yong)(yong)龙门(men)架悬(xuan)竹拼装(zhuang)施(shi)(shi)(shi)工(gong)(gong)中(zhong)曾采(cai)用(yong)(yong)紧束上部结(jie)构(gou)的(de)(de)加固括施(shi)(shi)(shi)。必级指出.利用(yong)(yong)安装(zhuang)梁(liang)紧束已施(shi)(shi)(shi)工(gong)(gong)完成的(de)(de)梁(liang)段只能(neng)作(zuo)为(wei)施(shi)(shi)(shi)工(gong)(gong)加固的(de)(de)辅助(zhu)措施(shi)(shi)(shi)。在悬(xuan)竹施(shi)(shi)(shi)工(gong)(gong)之前还要对梁(liang)、墩傲相(xiang)应的(de)(de)固结(jie)处理。

  3.在(zai)墩旁(pang)设置临时支架

  墩(dun)旁(pang)的支架或支承(cheng)(cheng)与临(lin)时(shi)(shi)团给共(gong)同承(cheng)(cheng)担施工弯矩。为两(liang)侧支承(cheng)(cheng),从预应(ying)力(li)锚(mao)具受力(li)情况看两(liang)侧支承(cheng)(cheng)的受力(li)和稳定性要好些。临(lin)时(shi)(shi)支承(cheng)(cheng)可设在预埋的固定锚(mao)座上,也(ye)可在桥墩(dun)基础内设置预埋件用作临(lin)时(shi)(shi)支承(cheng)(cheng)的锚(mao)座。当临(lin)时(shi)(shi)支承(cheng)(cheng)可能出现拉力(li)的情况下,必须设粗抗拉设施。


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