擠(ji)(ji)密(mi)(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)基施(shi)工(gong)(gong)(gong)，古交沉管(guan)擠(ji)(ji)密(mi)(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)，灰土擠(ji)(ji)密(mi)(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)，環(huan)保擠(ji)(ji)密(mi)(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)，水泥土擠(ji)(ji)密(mi)(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)，素土擠(ji)(ji)密(mi)(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)，夯(hang)擴擠(ji)(ji)密(mi)(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)，沉管(guan)擠(ji)(ji)密(mi)(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)，強夯(hang)地基施(shi)工(gong)(gong)(gong)，碎石擠(ji)(ji)密(mi)(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)，擠(ji)(ji)密(mi)(mi)(mi)螺紋樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)，鉆孔灌注樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)，軟土地基施(shi)工(gong)(gong)(gong)，灰土樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)，我公司主營：擠(ji)(ji)密(mi)(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)工(gong)(gong)(gong)，擠(ji)(ji)密(mi)(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)工(gong)(gong)(gong)程

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鉆孔(kong)灌注樁后注漿(jiang)施工(gong)中應何控制。

一、方案審查控制

鉆(zhan)孔(kong)灌注(zhu)(zhu)樁(zhuang)后注(zhu)(zhu)漿技(ji)術(shu)施(shi)(shi)工，施(shi)(shi)工單位(wei)除了(le)要編制鉆(zhan)孔(kong)灌注(zhu)(zhu)樁(zhuang)施(shi)(shi)工方案外，還需編制注(zhu)(zhu)漿技(ji)術(shu)的(de)專項施(shi)(shi)工方案，提供各種注(zhu)(zhu)漿參數(shu)。

后注(zhu)(zhu)漿(jiang)技(ji)術是一種新技(ji)術，不(bu)同(tong)(tong)的(de)施工(gong)單位，因(yin)其人(ren)員的(de)技(ji)術水平(ping)、機(ji)械設備(bei)及工(gong)程所在地(di)工(gong)程土物理力(li)學性質和賦存狀態(tai)的(de)不(bu)同(tong)(tong)，選擇的(de)參數不(bu)盡相同(tong)(tong)。因(yin)此，10米沉管擠密樁施工(gong)，監理人(ren)員要依據掌握的(de)施工(gong)技(ji)術知識、實際經驗、相關資料和有關規范、標準，對方案選取的(de)參數進(jin)行認真的(de)審查。審核的(de)參數主要有：開(kai)塞時(shi)間(jian)、開(kai)塞壓力(li)、注(zhu)(zhu)漿(jiang)壓力(li)、注(zhu)(zhu)入(ru)水泥的(de)預控量(liang)。

二、鉆孔控制

鉆孔(kong)控制(zhi)主(zhu)要(yao)依據相關(guan)規范的(de)要(yao)求進(jin)行控制(zhi)。

鉆孔(kong)控(kong)制主要依(yi)據《建筑地基基礎工程質量施工驗收規(gui)(gui)范》《建筑樁基技(ji)術規(gui)(gui)范》的相關要求和(he)設計規(gui)(gui)范進(jin)行控(kong)制，重點控(kong)制孔(kong)深、孔(kong)徑(jing)和(he)垂直度，了解孔(kong)壁(bi)情況(kuang)，及(ji)時了解孔(kong)內情況(kuang)，是否有坍(tan)孔(kong)、漏水等現(xian)象(xiang)，以便在后(hou)注(zhu)漿施工時采取相應的技(ji)術措施。

擠(ji)密(mi)樁(zhuang)(zhuang)(zhuang)基(ji)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，灰土(tu)擠(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，環保擠(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，水泥(ni)土(tu)擠(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，素土(tu)擠(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，夯(hang)擴擠(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，沉管擠(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)聯系電話(hua)，沉管擠(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，強夯(hang)地基(ji)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，碎(sui)石擠(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，擠(ji)密(mi)螺紋(wen)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，鉆(zhan)孔灌(guan)注樁(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，軟(ruan)土(tu)地基(ji)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，灰土(tu)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，我(wo)公司主營：擠(ji)密(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)(shi)(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，擠(ji)密(mi)樁(zhuang)(zhuang)(zhuang)工(gong)(gong)(gong)(gong)(gong)程

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開塞控制

在澆混凝(ning)土(tu)(tu)后的(de)3~5d，混凝(ning)土(tu)(tu)強度達到C10~C15時方(fang)可進(jin)行開(kai)塞。開(kai)塞時間的(de)早(zao)晚，對注漿較(jiao)為關鍵。

控制注(zhu)(zhu)(zhu)漿時間是確保順利注(zhu)(zhu)(zhu)漿的重點。開(kai)塞(sai)時間早了，混凝土(tu)未形(xing)成(cheng)一定的強(qiang)(qiang)度(du)，在(zai)高壓水(shui)的沖(chong)射下會破壞樁端的樁成(cheng)形(xing)和混凝土(tu)強(qiang)(qiang)度(du);過(guo)遲，包裹注(zhu)(zhu)(zhu)漿后(hou)的混凝土(tu)強(qiang)(qiang)度(du)過(guo)大，會造成(cheng)注(zhu)(zhu)(zhu)漿頭橡膠膜(mo)打不開(kai)現象，使預(yu)埋管報廢，終(zhong)不能注(zhu)(zhu)(zhu)漿。開(kai)塞(sai)時要在(zai)現場(chang)觀察(cha)高壓注(zhu)(zhu)(zhu)漿泵的開(kai)塞(sai)壓力，記錄開(kai)塞(sai)情(qing)況，要寫明(ming)開(kai)啟(qi)(qi)一根、兩根還是未開(kai)啟(qi)(qi)。

注漿控制

注漿時(shi)應注意(yi)相關檢查，只有情況符合施(shi)工(gong)要求，才能確(que)保(bao)工(gong)程(cheng)質量。

首先檢(jian)查(cha)水(shui)泥(ni)(ni)，其不能(neng)有結塊現象。核實進場的(de)(de)水(shui)泥(ni)(ni)量及(ji)水(shui)泥(ni)(ni)漿(jiang)(jiang)的(de)(de)水(shui)灰比(bi)，摻外(wai)加(jia)劑(ji)的(de)(de)，檢(jian)查(cha)外(wai)加(jia)劑(ji)的(de)(de)摻量。檢(jian)查(cha)高壓(ya)(ya)注(zhu)(zhu)漿(jiang)(jiang)泵的(de)(de)壓(ya)(ya)力表、閥(fa)門(men)、管線(xian)完好狀況(kuang)。注(zhu)(zhu)漿(jiang)(jiang)開始記錄注(zhu)(zhu)漿(jiang)(jiang)壓(ya)(ya)力。注(zhu)(zhu)漿(jiang)(jiang)壓(ya)(ya)力過(guo)小(xiao)，對樁端(duan)土(tu)、樁周(zhou)土(tu)加(jia)固范圍滲入(ru)充填(tian)強度(du)、深度(du)小(xiao)，加(jia)固作用小(xiao);注(zhu)(zhu)漿(jiang)(jiang)壓(ya)(ya)力過(guo)大，可能(neng)會損壞注(zhu)(zhu)漿(jiang)(jiang)管。因此(ci)要控制一個較合(he)適的(de)(de)注(zhu)(zhu)漿(jiang)(jiang)壓(ya)(ya)力，一般(ban)為開塞壓(ya)(ya)力的(de)(de)一半。注(zhu)(zhu)漿(jiang)(jiang)一般(ban)以注(zhu)(zhu)入(ru)水(shui)泥(ni)(ni)量為主控因素，水(shui)泥(ni)(ni)注(zhu)(zhu)入(ru)量達(da)到(dao)預定(ding)量，無特(te)殊情(qing)況(kuang)即可停(ting)止注(zhu)(zhu)漿(jiang)(jiang)。預定(ding)量可根據， 2根的(de)(de)注(zhu)(zhu)漿(jiang)(jiang)情(qing)況(kuang)進行修正。現場監理人員要記錄每次水(shui)泥(ni)(ni)的(de)(de)用量，保證(zheng)水(shui)泥(ni)(ni)的(de)(de)注(zhu)(zhu)入(ru)量達(da)到(dao)要求。

擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)基施(shi)(shi)工(gong)(gong)，灰土(tu)(tu)(tu)擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)，環(huan)保擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)，水泥土(tu)(tu)(tu)擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)，素土(tu)(tu)(tu)擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)，夯擴擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)，沉(chen)管擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)，強(qiang)夯地基施(shi)(shi)工(gong)(gong)，碎石擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)，擠(ji)(ji)(ji)密(mi)(mi)螺紋樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)，鉆(zhan)孔灌注樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)，軟土(tu)(tu)(tu)地基施(shi)(shi)工(gong)(gong)，灰土(tu)(tu)(tu)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)，我公(gong)司主營：擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)，擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)工(gong)(gong)程(cheng)

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避免鉆孔(kong)灌注樁護(hu)筒底(di)部孔(kong)壁坍塌(ta)措施

　1、質量(liang)問題及現象

　孔壁坍塌；鉆(zhan)機傾(qing)斜。

　2、原因分析

　1）護(hu)筒(tong)底(di)部及周圍未用粘土回(hui)填或(huo)夯實不足，在鉆進過程中(zhong)或(huo)灌注(zhu)過程中(zhong)泥(ni)漿護(hu)筒(tong)底(di)掏空。

　2）由于提(ti)供的地(di)質鉆探資(zi)料不(bu)祥，使護(hu)筒底產(chan)處于淤泥或砂層少。

　3）護筒直徑較(jiao)小。

　4）地表水滲入護筒外圍填土(tu)中(zhong)，造成填土(tu)松軟。

避(bi)免鉆孔灌注樁(zhuang)護筒底(di)部(bu)孔壁坍塌措(cuo)施

　3、預防措施

　1）護筒底部應(ying)回填(tian)至少(shao)50cm厚的粘土，當土質為砂性(xing)土時(shi)護筒周(zhou)圍0.5-1.0m范圍內也(ye)應(ying)用粘土回填(tian)并夯實。

　2）根(gen)據設計部(bu)門提供的(de)地質資料，護筒底部(bu)應穿過淤泥(ni)和砂層。

　3）護筒直徑應大(da)于設計孔徑20-30cm（有鉆(zhan)(zhan)桿(gan)的正反循(xun)環鉆(zhan)(zhan)）、30-40cm（無鉆(zhan)(zhan)桿(gan)的潛(qian)水電鉆(zhan)(zhan)或沖擊(ji)鉆(zhan)(zhan)）。

　4）護筒出(chu)漿(jiang)孔(kong)處應(ying)用粘(zhan)土夯(hang)填，同(tong)時(shi)應(ying)保(bao)持出(chu)漿(jiang)順利，周(zhou)圍不(bu)得有(you)積水，避免(mian)護筒周(zhou)圍泥土流失(shi)，造成坍孔(kong)。