橡(xiang)胶(jiao)抽(chou)拔(ba)管(guan)是一种用(yong)于(yu)混凝(ning)土(tu)(tu)构(gou)件小(xiao)直径成(cheng)孔的新(xin)型芯默(mo),它主要为桥梁上形成(cheng)较小(xiao)预应力孔而(er)设计,也(ye)(ye)可用(yong)于(yu)其它建(jian)筑(zhu)行(xing)业混凝(ning)土(tu)(tu)的成(cheng)也(ye)(ye)。它是利用(yong)其高强度,高弹性(xing)和橡(xiang)胶(jiao)体积不可压缩性(xing)能,在抽(chou)拔(ba)管(guan)内(nei)不加任何骨架材料,在管(guan)体轴向(xiang)受力时(shi),即会轴向(xiang)伸长(zhang),径向(xiang)自(zi)然弯(wan)细(xi),使(shi)管(guan)体和混凝(ning)土(tu)(tu)也(ye)(ye)壁(bi)出现(xian)向(xiang)隙而(er)逐步(bu)剥离拉出。抽(chou)拔(ba)有力,施工方便,可反复使(shi)用(yong),寿(shou)命长(zhang),表面光(guang)(guang)滑,平整度好,预留孔孔壁(bi)光(guang)(guang)滑,且抽(chou)拔(ba)时(shi)向(xiang)不受混凝(ning)土(tu)(tu)凝(ning)固时(shi)内(nei)的限制(zhi),经济效益是显而(er)易见的。
该产品主要用于各种规格的钢筋(jin)混凝土(tu)构(gou)件(jian)(jian)成(cheng)孔(kong),包括桩、屋架、屋面板、柱、梁(liang)、墙板等构(gou)件(jian)(jian)成(cheng)孔(kong)的新(xin)型工(gong)程橡(xiang)胶制品。橡(xiang)胶抽(chou)(chou)拔管(guan)(guan)与(yu)传统使(shi)(shi)用的钢质(zhi)(zhi)波纹管(guan)(guan)相比(bi),具(ju)有无(wu)可(ke)比(bi)拟(ni)的优点(dian),即(ji)施工(gong)装卸(xie)灵活、结(jie)构(gou)简单、造价低(di)(di)廉和能够重(zhong)复使(shi)(shi)用等特点(dian)。可(ke)用于直径(jing)50~90mm的混凝构(gou)件(jian)(jian)的成(cheng)孔(kong),使(shi)(shi)用温度在(zai)-10~80℃的范围(wei),特别适用于后张紧预应力(li)桥梁(liang)的抽(chou)(chou)孔(kong),它可(ke)使(shi)(shi)混凝土(tu)构(gou)件(jian)(jian)施工(gong)简便,抽(chou)(chou)孔(kong)快速,质(zhi)(zhi)量好,并能节约大量三材和劳(lao)力(li)。橡(xiang)胶抽(chou)(chou)拔管(guan)(guan)与(yu)其他橡(xiang)胶制品相比(bi),其技术难(nan)点(dian)在(zai)于挤出橡(xiang)胶制品需具(ju)有良好的弹性和伸长率,且硫化是在(zai)高(gao)(gao)温低(di)(di)压下(xia)进行,无(wu)模具(ju),这就需要在(zai)配方设计和工(gong)艺设计上要达到较高(gao)(gao)水(shui)平