鉆孔樁施工中正循環鉆機和反循環鉆機施工有何區別？

點擊數：61862017-05-15 10:16:22　來源:

鉆(zhan)孔樁施(shi)工中正循環鉆(zhan)機和反循環鉆(zhan)機施(shi)工有何區(qu)別(bie)？

答：正循(xun)環(huan)(huan)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)機(ji)和(he)反循(xun)環(huan)(huan)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)機(ji),都是通(tong)過(guo)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)井(jing)(jing)(jing)(jing)液(泥(ni)漿(jiang)(jiang))的(de)循(xun)環(huan)(huan)進(jin)行保護鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)井(jing)(jing)(jing)(jing)井(jing)(jing)(jing)(jing)壁和(he)出(chu)渣(zha)的(de),即通(tong)過(guo)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)井(jing)(jing)(jing)(jing)液(泥(ni)漿(jiang)(jiang))的(de)循(xun)環(huan)(huan),把(ba)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)孔(kong)里的(de)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)渣(zha)帶出(chu)來.它們在鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)進(jin)成(cheng)孔(kong)的(de)工(gong)藝上是相同(tong)的(de),適用的(de)地層也基(ji)本相同(tong).不同(tong)的(de)就(jiu)是鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)井(jing)(jing)(jing)(jing)液(泥(ni)漿(jiang)(jiang))的(de)循(xun)環(huan)(huan)方(fang)式(shi).正循(xun)環(huan)(huan)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)機(ji)的(de)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)井(jing)(jing)(jing)(jing)液(泥(ni)漿(jiang)(jiang))是由(you)泥(ni)漿(jiang)(jiang)泵從(cong)泥(ni)漿(jiang)(jiang)池里抽到鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿里,通(tong)過(guo)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿不斷的(de)輸送到鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)井(jing)(jing)(jing)(jing)里,然后(hou)從(cong)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)井(jing)(jing)(jing)(jing)井(jing)(jing)(jing)(jing)口自然的(de)排(pai)出(chu)來,同(tong)時(shi)把(ba)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)渣(zha)帶出(chu)到地面上來.由(you)于(yu)它是靠鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)井(jing)(jing)(jing)(jing)液(泥(ni)漿(jiang)(jiang))的(de)自然循(xun)環(huan)(huan)方(fang)式(shi)排(pai)渣(zha),所以循(xun)環(huan)(huan)能(neng)力和(he)排(pai)渣(zha)能(neng)力都比較(jiao)弱,只能(neng)排(pai)出(chu)一部分鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)渣(zha),而且(qie)顆(ke)粒比較(jiao)大的(de)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)渣(zha)也不能(neng)排(pai)出(chu)來,鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)井(jing)(jing)(jing)(jing)里殘留的(de)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)渣(zha)比較(jiao)多(duo),影響了(le)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)進(jin)速度,鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)具的(de)磨損也比較(jiao)大.
反循環鉆(zhan)(zhan)(zhan)機的鉆(zhan)(zhan)(zhan)井液(泥漿)的循環方式則正好相反,它的鉆(zhan)(zhan)(zhan)井液是(shi)用(yong)(yong)泥漿泵從(cong)鉆(zhan)(zhan)(zhan)井的井口(鉆(zhan)(zhan)(zhan)桿外面)向鉆(zhan)(zhan)(zhan)井里輸(shu)送,再(zai)用(yong)(yong)壓(ya)縮空氣或泥漿泵,從(cong)鉆(zhan)(zhan)(zhan)桿的中(zhong)間抽出來,所(suo)(suo)以(yi)循環能(neng)(neng)力和排(pai)(pai)渣能(neng)(neng)力都比(bi)較(jiao)強,不但排(pai)(pai)渣比(bi)較(jiao)干(gan)凈,而且顆粒比(bi)較(jiao)大(da)(da)的鉆(zhan)(zhan)(zhan)渣也能(neng)(neng)排(pai)(pai)出來,像雞蛋大(da)(da)的鉆(zhan)(zhan)(zhan)渣都能(neng)(neng)排(pai)(pai)出來.所(suo)(suo)以(yi)更適合(he)于在卵石層等(deng)顆粒比(bi)較(jiao)大(da)(da)的地層中(zhong)鉆(zhan)(zhan)(zhan)進成孔.