1.新產品研(yan)發能力(li)相對不足

現在(zai)幾乎所有的(de)(de)旋(xuan)挖鉆(zhan)機制(zhi)造商都實(shi)現了產(chan)(chan)品(pin)的(de)(de)系(xi)列化(hua)(hua)，但是(shi)在(zai)向小型化(hua)(hua)和大(da)型化(hua)(hua)方向發展的(de)(de)同(tong)時，國(guo)內的(de)(de)生產(chan)(chan)企業(ye)研發能(neng)力(li)不(bu)足日益凸顯，制(zhi)造商普遍缺(que)乏(fa)對旋(xuan)挖鉆(zhan)機基礎性(xing)和適(shi)應性(xing)的(de)(de)研究(jiu)，建立在(zai)工程實(shi)際情況和客戶需求上的(de)(de)模擬(ni)工況研究(jiu)和產(chan)(chan)品(pin)多功能(neng)化(hua)(hua)的(de)(de)研究(jiu)更是(shi)乏(fa)善可陳，使(shi)得(de)研發出來的(de)(de)小型鉆(zhan)機或者超大(da)鉆(zhan)機缺(que)乏(fa)實(shi)用(yong)性(xing)與(yu)性(xing)。

2.集體性不適應

在國(guo)際(ji)(ji)化的(de)(de)背景下，旋挖鉆機取得了的(de)(de)成功，但是，面對復雜(za)多變的(de)(de)國(guo)際(ji)(ji)市場競爭(zheng)很多企業仍(reng)(reng)然表現得無(wu)所適從。以(yi)服務(wu)代替產(chan)品(pin)質量的(de)(de)做法并不符合國(guo)際(ji)(ji)慣例，此外，價格戰的(de)(de)陰(yin)影(ying)仍(reng)(reng)然困擾中國(guo)企業。

3.基礎性資源領域的(de)缺(que)失

在目前(qian)的(de)(de)(de)背后，是高0檔材料(liao)短(duan)缺，產品和工藝相(xiang)對落后、進口外購件依然緊(jin)缺的(de)(de)(de)現實(shi)，是原始、集(ji)成和引進消化吸(xi)收(shou)再能力缺乏(fa)的(de)(de)(de)現實(shi)。

小型旋挖(wa)機在鉆孔到(dao)位后(hou)，要做(zuo)到(dao)的(de)(de)(de)第0一(yi)(yi)步就是清(qing)(qing)孔。若是小型旋挖(wa)機鉆孔的(de)(de)(de)，應注意(yi)提升鉆錐20-30ｃｍ后(hou)繼續循環。可用相對(dui)密(mi)度(du)較低的(de)(de)(de)泥漿或清(qing)(qing)水(shui)(shui)壓入(ru)清(qing)(qing)孔，具體應視實際情(qing)(qing)況而定。如地下水(shui)(shui)位高時(shi)，地層(ceng)容易坍塌，泥漿相對(dui)密(mi)度(du)可大些，但(dan)過(guo)大會造成混(hun)凝土頂(ding)升困難(nan)，特別要注意(yi)的(de)(de)(de)是避(bi)免(mian)泥漿比(bi)重上(shang)下不(bu)一(yi)(yi)的(de)(de)(de)情(qing)(qing)況。清(qing)(qing)孔過(guo)程中(zhong)應注意(yi)保持水(shui)(shui)頭，經常(chang)檢測泥漿指標(biao)，一(yi)(yi)旦達標(biao)，迅速(su)起(qi)鉆。可用直徑(jing)(jing)比(bi)設計樁(zhuang)徑(jing)(jing)小5ｃｍ鋼筋(jin)圓圈放入(ru)孔內驗收樁(zhuang)徑(jing)(jing)，然后(hou)下鋼筋(jin)籠，盡可能縮短澆筑前的(de)(de)(de)操作時(shi)間，二(er)手旋挖(wa)鉆施工價格(ge)，減(jian)少沉淀量。

鉆(zhan)(zhan)孔對中(zhong)(zhong)過程中(zhong)(zhong)，比(bi)較易忽視的(de)就(jiu)是鉆(zhan)(zhan)機底座的(de)水(shui)平(ping)問題(ti)，這在一(yi)般(ban)成套設備中(zhong)(zhong)因為有(you)液壓調整(zheng)(zheng)裝置，問題(ti)不(bu)(bu)大，只(zhi)要注(zhu)意就(jiu)行了(le)；而(er)在自(zi)制的(de)鉆(zhan)(zhan)孔設備中(zhong)(zhong)，由于沒有(you)水(shui)平(ping)調整(zheng)(zheng)裝置，再加上(shang)有(you)時在水(shui)上(shang)搭設平(ping)臺，平(ping)臺本身即與水(shui)平(ping)面不(bu)(bu)平(ping)行，致使鉆(zhan)(zhan)桿夾具無法(fa)保持(chi)水(shui)平(ping)，引起鉆(zhan)(zhan)桿的(de)不(bu)(bu)垂直，從而(er)影響灌注(zhu)樁的(de)垂直性(xing)。

嚴(yan)(yan)禁(jin)用(yong)加深孔底深度的(de)方法代替清孔，這(zhe)將會極(ji)大地降(jiang)低(di)樁(zhuang)尖處土(tu)的(de)極(ji)限承載力，小型(xing)旋(xuan)挖(wa)鉆施工價格，也(ye)容(rong)易(yi)因泥漿(jiang)相(xiang)對(dui)密度過大而造(zao)成(cheng)夾泥或斷樁(zhuang)。將制(zhi)做好的(de)鋼筋(jin)籠(long)(long)(long)(long)下(xia)放(fang)(fang)時(shi)，應保(bao)(bao)(bao)證鋼筋(jin)籠(long)(long)(long)(long)的(de)焊接質量，成(cheng)籠(long)(long)(long)(long)圓直。應選(xuan)派經(jing)驗豐富、技(ji)術熟練(lian)的(de)人員操作(zuo)，為(wei)節(jie)省時(shi)間(jian)，可兩名人員同時(shi)操作(zuo)。要(yao)求嚴(yan)(yan)格按(an)圖施工制(zhi)作(zuo)，包括(kuo)鋼筋(jin)的(de)數量、鋼筋(jin)籠(long)(long)(long)(long)的(de)加強箍，這(zhe)樣(yang)才能保(bao)(bao)(bao)證下(xia)放(fang)(fang)時(shi)不變形。準確計算(suan)鋼筋(jin)籠(long)(long)(long)(long)的(de)置(zhi)(zhi)放(fang)(fang)位置(zhi)(zhi)，要(yao)保(bao)(bao)(bao)證伸進承臺(tai)部分的(de)鋼筋(jin)長度。下(xia)放(fang)(fang)時(shi)，隨時(shi)調整籠(long)(long)(long)(long)子的(de)位置(zhi)(zhi)，使籠(long)(long)(long)(long)中心與樁(zhuang)中心保(bao)(bao)(bao)持一(yi)致。為(wei)了保(bao)(bao)(bao)證中心的(de)一(yi)致性及(ji)保(bao)(bao)(bao)證鋼筋(jin)籠(long)(long)(long)(long)的(de)混(hun)凝(ning)土(tu)保(bao)(bao)(bao)護層的(de)厚度，沿鋼筋(jin)籠(long)(long)(long)(long)縱向設(she)置(zhi)(zhi)混(hun)凝(ning)土(tu)保(bao)(bao)(bao)護層墊塊。

而在(zai)自制的(de)(de)鉆(zhan)孔(kong)設(she)(she)備中，由于沒有水(shui)平調整裝置，再加上有時在(zai)水(shui)上搭(da)設(she)(she)平臺，平臺本身即與水(shui)平面不平行(xing)(xing)，致使鉆(zhan)桿夾具無法(fa)保持水(shui)平，廣東旋挖(wa)(wa)鉆(zhan)施(shi)工價格，引起鉆(zhan)桿的(de)(de)不垂直(zhi)，從而影(ying)響灌(guan)注樁的(de)(de)垂直(zhi)性。小型(xing)旋挖(wa)(wa)機在(zai)下導管前，寶峨旋挖(wa)(wa)鉆(zhan)施(shi)工價格，應對導管的(de)(de)連(lian)接進行(xing)(xing)水(shui)密試驗，并記錄各節長度和編號，便于澆筑過程中的(de)(de)長度計量。

在工(gong)程項(xiang)目施(shi)(shi)工(gong)中，旋挖鉆孔(kong)成樁(zhuang)施(shi)(shi)工(gong)技術屬(shu)于(yu)一種新(xin)的(de)技術手段，與(yu)現有(you)的(de)樁(zhuang)基成孔(kong)施(shi)(shi)工(gong)技術相(xiang)比，不僅成孔(kong)效(xiao)率有(you)很大(da)的(de)提(ti)升變化，而且鉆孔(kong)成樁(zhuang)施(shi)(shi)工(gong)效(xiao)果(guo)也比較好，具有(you)很大(da)的(de)應用(yong)價值。

這(zhe)是由于，旋(xuan)(xuan)(xuan)挖(wa)(wa)鉆(zhan)孔(kong)(kong)(kong)成(cheng)(cheng)(cheng)樁(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)技(ji)(ji)(ji)術(shu)(shu)在施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)過程(cheng)(cheng)中(zhong)是利用(yong)鉆(zhan)機設(she)備自身的(de)(de)(de)(de)(de)壓力實現鉆(zhan)進(jin)(jin)(jin)成(cheng)(cheng)(cheng)孔(kong)(kong)(kong)，并(bing)且(qie)(qie)鉆(zhan)孔(kong)(kong)(kong)過程(cheng)(cheng)中(zhong)能(neng)(neng)夠(gou)對于所成(cheng)(cheng)(cheng)孔(kong)(kong)(kong)洞中(zhong)的(de)(de)(de)(de)(de)雜物進(jin)(jin)(jin)行(xing)(xing)及時有效(xiao)的(de)(de)(de)(de)(de)清除，而(er)這(zhe)種將鉆(zhan)孔(kong)(kong)(kong)挖(wa)(wa)土(tu)(tu)及提土(tu)(tu)、卸土(tu)(tu)多項工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)作(zuo)同(tong)(tong)時實現的(de)(de)(de)(de)(de)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)技(ji)(ji)(ji)術(shu)(shu)，在很(hen)大(da)(da)程(cheng)(cheng)度(du)上(shang)提升了成(cheng)(cheng)(cheng)孔(kong)(kong)(kong)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)的(de)(de)(de)(de)(de)效(xiao)率，同(tong)(tong)時還能(neng)(neng)夠(gou)對鉆(zhan)孔(kong)(kong)(kong)成(cheng)(cheng)(cheng)樁(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)質量效(xiao)果進(jin)(jin)(jin)行(xing)(xing)保障(zhang)，施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)應(ying)用(yong)優勢自然(ran)高于一般的(de)(de)(de)(de)(de)樁(zhuang)(zhuang)(zhuang)(zhuang)基(ji)成(cheng)(cheng)(cheng)孔(kong)(kong)(kong)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)技(ji)(ji)(ji)術(shu)(shu)。 此外，在工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)程(cheng)(cheng)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)應(ying)用(yong)中(zhong)，旋(xuan)(xuan)(xuan)挖(wa)(wa)鉆(zhan)孔(kong)(kong)(kong)成(cheng)(cheng)(cheng)樁(zhuang)(zhuang)(zhuang)(zhuang)技(ji)(ji)(ji)術(shu)(shu)不(bu)(bu)僅(jin)具(ju)有較(jiao)強的(de)(de)(de)(de)(de)適(shi)應(ying)能(neng)(neng)力，能(neng)(neng)夠(gou)適(shi)用(yong)于多種樁(zhuang)(zhuang)(zhuang)(zhuang)基(ji)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)程(cheng)(cheng)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)，而(er)且(qie)(qie)在不(bu)(bu)同(tong)(tong)的(de)(de)(de)(de)(de)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)環(huan)境下(xia)(xia)，也(ye)能(neng)(neng)完成(cheng)(cheng)(cheng)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)任(ren)務，像(xiang)淤泥(ni)層(ceng)(ceng)、粘土(tu)(tu)層(ceng)(ceng)以及砂土(tu)(tu)層(ceng)(ceng)、巖(yan)層(ceng)(ceng)等不(bu)(bu)同(tong)(tong)地層(ceng)(ceng)性(xing)質的(de)(de)(de)(de)(de)樁(zhuang)(zhuang)(zhuang)(zhuang)基(ji)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)中(zhong)都能(neng)(neng)夠(gou)應(ying)用(yong)實現，應(ying)用(yong)范圍十分廣泛。對于建(jian)(jian)筑(zhu)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)程(cheng)(cheng)來講，旋(xuan)(xuan)(xuan)挖(wa)(wa)鉆(zhan)孔(kong)(kong)(kong)成(cheng)(cheng)(cheng)樁(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)技(ji)(ji)(ji)術(shu)(shu)相(xiang)對比較(jiao)常見(jian)，它(ta)進(jin)(jin)(jin)行(xing)(xing)樁(zhuang)(zhuang)(zhuang)(zhuang)基(ji)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)主要通過在地基(ji)上(shang)完成(cheng)(cheng)(cheng)不(bu)(bu)同(tong)(tong)比例的(de)(de)(de)(de)(de)樁(zhuang)(zhuang)(zhuang)(zhuang)孔(kong)(kong)(kong)設(she)置，然(ran)后(hou)在安(an)裝鋼筋籠的(de)(de)(de)(de)(de)情況下(xia)(xia)，與混凝土(tu)(tu)澆(jiao)筑(zhu)方式(shi)，實現樁(zhuang)(zhuang)(zhuang)(zhuang)基(ji)基(ji)礎的(de)(de)(de)(de)(de)加固(gu)完善，來確保建(jian)(jian)筑(zhu)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)程(cheng)(cheng)樁(zhuang)(zhuang)(zhuang)(zhuang)基(ji)效(xiao)果。根據這(zhe)一施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)過程(cheng)(cheng)就可(ke)以看出，旋(xuan)(xuan)(xuan)挖(wa)(wa)鉆(zhan)孔(kong)(kong)(kong)成(cheng)(cheng)(cheng)樁(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)技(ji)(ji)(ji)術(shu)(shu)進(jin)(jin)(jin)行(xing)(xing)建(jian)(jian)筑(zhu)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)程(cheng)(cheng)樁(zhuang)(zhuang)(zhuang)(zhuang)基(ji)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)應(ying)用(yong)不(bu)(bu)僅(jin)具(ju)有較(jiao)為突出的(de)(de)(de)(de)(de)自動化、機械化與簡單化特征，同(tong)(tong)時也(ye)在很(hen)大(da)(da)程(cheng)(cheng)度(du)上(shang)減輕(qing)了建(jian)(jian)筑(zhu)樁(zhuang)(zhuang)(zhuang)(zhuang)基(ji)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)人員的(de)(de)(de)(de)(de)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)作(zuo)量，大(da)(da)幅度(du)提升樁(zhuang)(zhuang)(zhuang)(zhuang)基(ji)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)作(zuo)效(xiao)率。后(hou)，旋(xuan)(xuan)(xuan)挖(wa)(wa)鉆(zhan)孔(kong)(kong)(kong)成(cheng)(cheng)(cheng)樁(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)技(ji)(ji)(ji)術(shu)(shu)在建(jian)(jian)筑(zhu)樁(zhuang)(zhuang)(zhuang)(zhuang)基(ji)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)應(ying)用(yong)中(zhong)，對建(jian)(jian)筑(zhu)樁(zhuang)(zhuang)(zhuang)(zhuang)基(ji)地層(ceng)(ceng)產生沖擊影響也(ye)比較(jiao)小(xiao)，且(qie)(qie)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)應(ying)用(yong)靈活性(xing)較(jiao)強，能(neng)(neng)夠(gou)結(jie)合施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)環(huan)境通過更換鉆(zhan)頭提高鉆(zhan)孔(kong)(kong)(kong)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)效(xiao)率，同(tong)(tong)時進(jin)(jin)(jin)行(xing)(xing)施(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)(gong)質量保障(zhang)。