擠(ji)密(mi)(mi)(mi)(mi)(mi)樁基(ji)施(shi)(shi)(shi)工(gong)(gong)，灰(hui)土(tu)擠(ji)密(mi)(mi)(mi)(mi)(mi)樁施(shi)(shi)(shi)工(gong)(gong)，環(huan)保(bao)擠(ji)密(mi)(mi)(mi)(mi)(mi)樁施(shi)(shi)(shi)工(gong)(gong)，水泥土(tu)擠(ji)密(mi)(mi)(mi)(mi)(mi)樁施(shi)(shi)(shi)工(gong)(gong)，素土(tu)擠(ji)密(mi)(mi)(mi)(mi)(mi)樁施(shi)(shi)(shi)工(gong)(gong)，夯擴擠(ji)密(mi)(mi)(mi)(mi)(mi)樁施(shi)(shi)(shi)工(gong)(gong)，沉管擠(ji)密(mi)(mi)(mi)(mi)(mi)樁施(shi)(shi)(shi)工(gong)(gong)，強夯地(di)基(ji)施(shi)(shi)(shi)工(gong)(gong)，碎(sui)石擠(ji)密(mi)(mi)(mi)(mi)(mi)樁施(shi)(shi)(shi)工(gong)(gong)，擠(ji)密(mi)(mi)(mi)(mi)(mi)螺紋(wen)樁施(shi)(shi)(shi)工(gong)(gong)，鉆孔灌注(zhu)樁施(shi)(shi)(shi)工(gong)(gong)，軟土(tu)地(di)基(ji)施(shi)(shi)(shi)工(gong)(gong)，灰(hui)土(tu)樁施(shi)(shi)(shi)工(gong)(gong)，我公司(si)主營：擠(ji)密(mi)(mi)(mi)(mi)(mi)樁施(shi)(shi)(shi)工(gong)(gong)，擠(ji)密(mi)(mi)(mi)(mi)(mi)樁工(gong)(gong)程

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開塞控制

在(zai)澆混凝(ning)土(tu)后的(de)(de)3~5d，混凝(ning)土(tu)強(qiang)度達到(dao)C10~C15時(shi)方可進(jin)行開塞(sai)。開塞(sai)時(shi)間的(de)(de)早晚，對注漿較為關鍵。

控(kong)制注(zhu)漿(jiang)(jiang)時(shi)間是(shi)確保順利注(zhu)漿(jiang)(jiang)的(de)(de)重點(dian)。開(kai)(kai)塞時(shi)間早(zao)了(le)，混(hun)凝(ning)(ning)土(tu)(tu)未形(xing)成一定的(de)(de)強度(du)，在高(gao)壓(ya)水的(de)(de)沖射下會(hui)(hui)破(po)壞樁(zhuang)端的(de)(de)樁(zhuang)成形(xing)和混(hun)凝(ning)(ning)土(tu)(tu)強度(du);過(guo)遲，包裹注(zhu)漿(jiang)(jiang)后的(de)(de)混(hun)凝(ning)(ning)土(tu)(tu)強度(du)過(guo)大(da)，會(hui)(hui)造(zao)成注(zhu)漿(jiang)(jiang)頭橡膠膜打不開(kai)(kai)現(xian)象(xiang)，使預埋管報廢，終不能注(zhu)漿(jiang)(jiang)。開(kai)(kai)塞時(shi)要(yao)在現(xian)場觀察高(gao)壓(ya)注(zhu)漿(jiang)(jiang)泵的(de)(de)開(kai)(kai)塞壓(ya)力(li)，記錄開(kai)(kai)塞情(qing)況，要(yao)寫(xie)明(ming)開(kai)(kai)啟(qi)一根(gen)、兩根(gen)還是(shi)未開(kai)(kai)啟(qi)。

注漿控制

注漿時應注意(yi)相關(guan)檢查，只有情況符合施工要(yao)求(qiu)，才能(neng)確保工程質量。

首先檢查(cha)水泥(ni)，其不能(neng)有結塊現象(xiang)。核實(shi)進場(chang)的水泥(ni)量(liang)(liang)及水泥(ni)漿的水灰(hui)比(bi)，摻外加劑(ji)的，山(shan)西擠密樁施工廠家，檢查(cha)外加劑(ji)的摻量(liang)(liang)。檢查(cha)高壓(ya)注(zhu)(zhu)(zhu)漿泵(beng)的壓(ya)力表、閥門、管(guan)(guan)線完好狀況(kuang)(kuang)。注(zhu)(zhu)(zhu)漿開始記(ji)錄注(zhu)(zhu)(zhu)漿壓(ya)力。注(zhu)(zhu)(zhu)漿壓(ya)力過小，對樁端土、樁周土加固范圍(wei)滲入(ru)充填強度、深度小，加固作(zuo)用(yong)小;注(zhu)(zhu)(zhu)漿壓(ya)力過大(da)，可能(neng)會損壞注(zhu)(zhu)(zhu)漿管(guan)(guan)。因(yin)此要(yao)控(kong)(kong)制一個較合(he)適(shi)的注(zhu)(zhu)(zhu)漿壓(ya)力，一般為(wei)開塞(sai)壓(ya)力的一半。注(zhu)(zhu)(zhu)漿一般以(yi)注(zhu)(zhu)(zhu)入(ru)水泥(ni)量(liang)(liang)為(wei)主控(kong)(kong)因(yin)素，水泥(ni)注(zhu)(zhu)(zhu)入(ru)量(liang)(liang)達到(dao)預定量(liang)(liang)，無特殊情況(kuang)(kuang)即可停止注(zhu)(zhu)(zhu)漿。預定量(liang)(liang)可根據， 2根的注(zhu)(zhu)(zhu)漿情況(kuang)(kuang)進行修正(zheng)。現場(chang)監理人員要(yao)記(ji)錄每次(ci)水泥(ni)的用(yong)量(liang)(liang)，保(bao)證水泥(ni)的注(zhu)(zhu)(zhu)入(ru)量(liang)(liang)達到(dao)要(yao)求。

擠(ji)(ji)(ji)密(mi)樁(zhuang)(zhuang)(zhuang)基施(shi)工(gong)(gong)，灰(hui)(hui)土(tu)擠(ji)(ji)(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)，環(huan)保擠(ji)(ji)(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)，水泥土(tu)擠(ji)(ji)(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)，素(su)土(tu)擠(ji)(ji)(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)，夯擴擠(ji)(ji)(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)，沉管擠(ji)(ji)(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)，強夯地基施(shi)工(gong)(gong)，碎石擠(ji)(ji)(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)，擠(ji)(ji)(ji)密(mi)螺紋樁(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)，鉆孔灌注(zhu)樁(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)，軟土(tu)地基施(shi)工(gong)(gong)，灰(hui)(hui)土(tu)樁(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)，我公司主營：擠(ji)(ji)(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)，擠(ji)(ji)(ji)密(mi)樁(zhuang)(zhuang)(zhuang)工(gong)(gong)程

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成孔偏斜

成孔偏斜是指成孔壁(bi)樁孔出現較大(da)垂直偏差或彎(wan)曲。

其造成原因和處理方法主要有(you)：

施(shi)工現(xian)場(chang)地(di)面(mian)軟弱或軟硬不均(jun)(jun)勻(yun)，在支架(jia)上鉆(zhan)孔時，支架(jia)的承載力(li)(li)不足，發(fa)(fa)生不均(jun)(jun)勻(yun)沉(chen)降(jiang)，導致鉆(zhan)桿不垂直(zhi)，造成成孔偏斜。為避(bi)免(mian)事故發(fa)(fa)生，場(chang)地(di)必須(xu)夯實平整，軌道及枕木宜均(jun)(jun)勻(yun)著地(di)，支架(jia)的承載力(li)(li)應(ying)滿足要求，在發(fa)(fa)生不均(jun)(jun)勻(yun)沉(chen)降(jiang)時，必須(xu)隨時調整。 850G工程資料

未(wei)做好鉆(zhan)(zhan)機(ji)安裝(zhuang)工作，是造成成孔(kong)偏斜的隱患。因此要求安裝(zhuang)地基(ji)穩(wen)固(gu)。鉆(zhan)(zhan)機(ji)就位時，應使(shi)(shi)轉盤，底座水平(ping)，使(shi)(shi)天輪的輪緣、鉆(zhan)(zhan)桿(gan)的卡盤和護筒的中心在同一垂直線上，并(bing)在鉆(zhan)(zhan)進過程(cheng)中防止位移，在不均勻(yun)地層中鉆(zhan)(zhan)孔(kong)時，采用自(zi)重大、鉆(zhan)(zhan)桿(gan)剛度大的鉆(zhan)(zhan)機(ji)。

遇到土(tu)層(ceng)呈(cheng)斜狀分布或土(tu)層(ceng)中夾(jia)有大的(de)孤石或其(qi)它硬(ying)物等情形。鉆速要加慢(man)檔(dang)。另外(wai)安(an)裝導正裝置(zhi)也是(shi)防止孔斜的(de)簡單有效的(de)方法。

樁底沉渣量過多

對(dui)摩擦樁(zhuang)(zhuang)(zhuang)來說(shuo)，由于其受(shou)力(li)(li)機理是通過樁(zhuang)(zhuang)(zhuang)表(biao)面和周圍土壤之間的(de)磨擦力(li)(li)或依附力(li)(li)，逐(zhu)漸把荷載(zai)從樁(zhuang)(zhuang)(zhuang)頂傳(chuan)遞到周圍的(de)土體中(zhong)，如果在設計中(zhong)端部反力(li)(li)不(bu)大，端部的(de)沉(chen)渣量對(dui)樁(zhuang)(zhuang)(zhuang)承(cheng)載(zai)力(li)(li)亦(yi)影響(xiang)不(bu)大；而對(dui)于承(cheng)載(zai)樁(zhuang)(zhuang)(zhuang)來說(shuo)，如果沉(chen)渣量過大，勢(shi)必(bi)造成(cheng)樁(zhuang)(zhuang)(zhuang)受(shou)荷時發生大量沉(chen)降，同(tong)樣使樁(zhuang)(zhuang)(zhuang)的(de)承(cheng)載(zai)力(li)(li)失(shi)效，因此鉆孔灌注樁(zhuang)(zhuang)(zhuang)的(de)沉(chen)渣量檢查是施工控制中(zhong)的(de)一項關鍵工作(zuo)。

擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)基施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，灰土擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，環(huan)保擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，水泥土擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，素土擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，山西(xi)擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)(gong)(gong)程，夯擴擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，沉管擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，強夯地基施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，山西(xi)擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，碎石擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)螺紋樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，鉆孔灌注樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，山西(xi)擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)隊，軟土地基施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，灰土樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，我公司(si)主營：擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)(gong)，擠(ji)(ji)(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)工(gong)(gong)(gong)(gong)(gong)(gong)程

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旋挖灌注樁澆注水(shui)下混凝(ning)土要求

⑴對混凝土的技術要求

樁設計要(yao)求混(hun)凝土(tu)強度(du)為(wei)C30，配比由商品混(hun)凝土(tu)供應商提供，粗(cu)骨料（碎石(shi)）粒(li)徑不(bu)得大于(yu)25mm，坍落度(du)180～220mm，采用(yong)普(pu)通硅酸鹽(yan)水(shui)泥(ni)，可適(shi)當摻(chan)(chan)加減水(shui)劑，摻(chan)(chan)量(liang)根據(ju)試(shi)驗確定(ding)。配制的(de)混(hun)凝土(tu)應具有良好的(de)工作性能。

⑵混(hun)(hun)凝(ning)土澆(jiao)注(zhu)前(qian)由技術人員檢查混(hun)(hun)凝(ning)土塌落度并記錄。混(hun)(hun)凝(ning)土在運輸、澆(jiao)筑過(guo)程中不(bu)能產生離析現象。

⑶導管內使用的隔(ge)水塞球膽大小要(yao)合適，安裝要(yao)正，一(yi)般位(wei)于(yu)水面(mian)以上。灌(guan)注混(hun)(hun)凝土前孔(kong)口(kou)要(yao)蓋嚴，防止混(hun)(hun)凝土落入(ru)孔(kong)中污染泥漿(jiang)。

⑷混(hun)(hun)(hun)凝(ning)(ning)土(tu)首(shou)灌(guan)(guan)量(liang)應灌(guan)(guan)至導(dao)(dao)管(guan)下口(kou)2m以(yi)上，保證(zheng)首(shou)灌(guan)(guan)導(dao)(dao)管(guan)埋(mai)(mai)入(ru)混(hun)(hun)(hun)凝(ning)(ning)土(tu)為3m左(zuo)右(you)。混(hun)(hun)(hun)凝(ning)(ning)土(tu)澆(jiao)注(zhu)時(shi)，導(dao)(dao)管(guan)下口(kou)埋(mai)(mai)入(ru)混(hun)(hun)(hun)凝(ning)(ning)土(tu)的深度不(bu)小于2m，不(bu)大于6m，設專人及時(shi)測定，以(yi)便掌(zhang)握導(dao)(dao)管(guan)提(ti)升高(gao)度。每次拆卸(xie)導(dao)(dao)管(guan)，必(bi)(bi)須經過測量(liang)計算導(dao)(dao)管(guan)埋(mai)(mai)深，然后確定卸(xie)管(guan)長度，使混(hun)(hun)(hun)凝(ning)(ning)土(tu)處于流動狀態，并(bing)作好澆(jiao)注(zhu)施工記錄。混(hun)(hun)(hun)凝(ning)(ning)土(tu)灌(guan)(guan)注(zhu)必(bi)(bi)須連續進行(xing)，中間不(bu)得間斷(duan)。拆除后的導(dao)(dao)管(guan)放入(ru)架(jia)子(zi)中并(bing)及時(shi)清洗干凈。