低應變檢測樁身完整性

做(zuo)(zuo)好(hao)各項準(zhun)備工作(zuo)，開始(shi)檢測；接上(shang)電源，啟(qi)動采(cai)集器(qi)和(he)微(wei)(wei)機(ji)，稍等(deng)片刻，微(wei)(wei)機(ji)自檢完(wan)(wan)畢，使(shi)之(zhi)(zhi)進(jin)入(ru)低(di)應變測試狀態(tai)(tai)，屏幕上(shang)出(chu)(chu)(chu)現(xian)參數(shu)設(she)(she)置(zhi)表；通過微(wei)(wei)機(ji)鍵(jian)盤設(she)(she)置(zhi)合(he)適的儀器(qi)工作(zuo)參數(shu)。然(ran)后使(shi)之(zhi)(zhi)進(jin)入(ru)采(cai)集信(xin)號(hao)狀態(tai)(tai)；通過微(wei)(wei)機(ji)鍵(jian)盤設(she)(she)置(zhi)合(he)適的儀器(qi)工作(zuo)參數(shu)。然(ran)后使(shi)之(zhi)(zhi)進(jin)入(ru)采(cai)集信(xin)號(hao)狀態(tai)(tai)；使(shi)樁(zhuang)頂的傳感器(qi)和(he)連線(xian)等(deng)安裝(zhuang)無誤，使(shi)儀器(qi)進(jin)入(ru)等(deng)待采(cai)集信(xin)號(hao)狀態(tai)(tai)；用擊錘(chui)垂直(zhi)激振樁(zhuang)頂，使(shi)儀器(qi)觸發，屏幕上(shang)出(chu)(chu)(chu)現(xian)樁(zhuang)體(ti)振動的時(shi)域(yu)波(bo)形(xing)(xing)(xing)曲線(xian)；可以通過鍵(jian)盤操(cao)作(zuo)，對(dui)波(bo)形(xing)(xing)(xing)幅度進(jin)行(xing)調整(zheng)；通過對(dui)時(shi)域(yu)波(bo)形(xing)(xing)(xing)的形(xing)(xing)(xing)態(tai)(tai)及(ji)頻域(yu)分(fen)析，初(chu)步分(fen)析被(bei)測樁(zhuang)的完(wan)(wan)整(zheng)性，并決定時(shi)域(yu)波(bo)形(xing)(xing)(xing)曲線(xian)是存盤還是清(qing)除重測。必要(yao)時(shi)，可對(dui)時(shi)域(yu)波(bo)形(xing)(xing)(xing)進(jin)行(xing)較詳細的分(fen)析、處理和(he)判斷。當出(chu)(chu)(chu)現(xian)異(yi)常(chang)波(bo)形(xing)(xing)(xing)時(shi)，應改變傳感器(qi)和(he)錘(chui)擊點位(wei)置(zhi)，取得更(geng)多的波(bo)形(xing)(xing)(xing)圖，以便更(geng)準(zhun)確的分(fen)析。通過資料分(fen)析，判別(bie)有無斷裂、離析、夾泥或縮徑等(deng)缺(que)陷、并確定其部位(wei)，判別(bie)樁(zhuang)長及(ji)混凝土質(zhi)量是否滿足設(she)(she)計要(yao)求，對(dui)單(dan)樁(zhuang)完(wan)(wan)整(zheng)性做(zuo)(zuo)出(chu)(chu)(chu)評價。