承插式聲測管
優點是便於安裝,可用電焊焊在鋼筋骨架外,可代替部分鋼筋截麵,而且由於鋼管剛度較大.埋置後可基本上保持其平行度和平直度,許多大直徑灌注樁均采用鋼管作為聲測管。但鋼管的價格較貴:
鋼質波紋管
是一種較好的聲測管材料,它具有管壁薄、鋼材省和抗滲、耐壓、強度高、柔性好等特點,通常用於預應力結構中的後張法預留孔道:用yong做zuo聲sheng測ce管guan時shi。可ke直zhi接jie綁bang紮zha在zai鋼gang筋jin骨gu架jia上shang,接jie頭tou處chu可ke用yong大da一yi號hao波bo紋wen管guan套tao接jie。由you於yu波bo紋wen管guan很hen輕qing,因yin而er操cao作zuo十shi分fen方fang便bian,但dan安an裝zhuang時shi需xu注zhu意yi保bao持chi其qi軸zhou線xian的de平ping直zhi。
塑料管
聲sheng阻zu抗kang率lv較jiao低di,用yong做zuo聲sheng測ce管guan具ju有you較jiao大da的de透tou聲sheng率lv,通tong常chang可ke用yong於yu較jiao小xiao的de灌guan注zhu樁zhuang,在zai大da型xing灌guan注zhu樁zhuang中zhong使shi用yong時shi應ying慎shen重zhong,因yin為wei大da直zhi徑jing樁zhuang需xu灌guan注zhu大da量liang混hun凝ning土tu,水shui泥ni的de水shui化hua熱re不bu易yi發fa散san:鑒jian於yu塑su料liao的de熱re膨peng脹zhang係xi數shu與yu混hun凝ning土tu的de相xiang差cha懸xuan殊shu,混hun凝ning土tu凝ning固gu後hou塑su料liao管guan因yin溫wen度du下xia降jiang而er產chan生sheng徑jing向xiang和he縱zong向xiang收shou縮suo,有you可ke能neng使shi之zhi與yu混hun凝ning土tu局ju部bu脫tuo開kai而er造zao成cheng空kong氣qi或huo水shui的de夾jia縫feng,在zai聲sheng通tong路lu上shang又you增zeng加jia了le更geng多duo反fan射she強qiang烈lie的de界jie麵mian,容rong易yi造zao成cheng誤wu判pan。
聲測管的直徑,通常比徑向換能器的直徑大l0mm即可,常用規格是內徑50-60mm。guanzidebihouduitoushenglvdeyingxianghenxiao,suoyi,yuanzeshangduiguanbihoudubuzuoxianzhi,dancongjieshengyonggangliangdejiaodueryan,guanbizhiyaonengchengshouxinjiaohunningtudeceyali,zeyueboyuesheng。







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