擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)基施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，灰土(tu)擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，環保擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，水泥土(tu)擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，素土(tu)擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，夯擴擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，沉(chen)管擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，強(qiang)夯地基施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，碎石擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，擠(ji)(ji)(ji)密(mi)(mi)螺紋樁(zhuang)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，鉆孔(kong)灌(guan)注樁(zhuang)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，軟土(tu)地基施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，灰土(tu)樁(zhuang)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，我公司主營：擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)，擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)工(gong)(gong)(gong)程

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避免鉆孔(kong)灌(guan)注樁護(hu)筒(tong)底部孔(kong)壁坍塌措施

　1、質量(liang)問題及(ji)現象

　孔壁(bi)坍塌；鉆機傾斜(xie)。

　2、原因分析

　1）護筒底部及周圍未用粘土(tu)回(hui)填或夯實不足，在鉆(zhan)進過程(cheng)中(zhong)或灌(guan)注(zhu)過程(cheng)中(zhong)泥(ni)漿(jiang)護筒底掏空。

　2）由于(yu)提供(gong)的地(di)質鉆探(tan)資料不祥，使護筒底產處于(yu)淤泥或砂層少。

　3）護筒直徑較小。

　4）地表水滲入護筒(tong)外圍填土中(zhong)，沉管(guan)擠密(mi)樁(zhuang)施工單位(wei)，造成填土松軟。

避免鉆孔灌注(zhu)樁護筒底(di)部孔壁坍塌措(cuo)施

　3、預防措施

　1）護(hu)筒(tong)底部應回(hui)填(tian)至少50cm厚(hou)的粘土(tu)(tu)，當土(tu)(tu)質(zhi)為砂性(xing)土(tu)(tu)時護(hu)筒(tong)周(zhou)圍0.5-1.0m范圍內(nei)也應用粘土(tu)(tu)回(hui)填(tian)并夯(hang)實。

　2）根(gen)據設計部門提供(gong)的地質資料，護筒底(di)部應穿過(guo)淤泥(ni)和(he)砂層。

　3）護筒(tong)直徑(jing)應大(da)于設計孔徑(jing)20-30cm（有鉆(zhan)(zhan)桿的(de)(de)正(zheng)反循環鉆(zhan)(zhan)）、30-40cm（無鉆(zhan)(zhan)桿的(de)(de)潛水電鉆(zhan)(zhan)或(huo)沖擊鉆(zhan)(zhan)）。

　4）護筒出(chu)漿(jiang)孔處(chu)應用粘土夯填，同(tong)時應保(bao)持出(chu)漿(jiang)順利(li)，周(zhou)圍(wei)不得有積水(shui)，避免(mian)護筒周(zhou)圍(wei)泥土流失，造成坍(tan)孔。

擠(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)基(ji)施(shi)(shi)工(gong)(gong)(gong)，灰(hui)土擠(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)，環保擠(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)，臨汾沉管擠(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)，水泥土擠(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)，素土擠(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)，夯擴擠(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)，沉管擠(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)，強夯地(di)基(ji)施(shi)(shi)工(gong)(gong)(gong)，碎石擠(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)，擠(ji)密(mi)(mi)螺紋樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)，鉆孔灌注樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)，軟土地(di)基(ji)施(shi)(shi)工(gong)(gong)(gong)，灰(hui)土樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)，我公司主營(ying)：擠(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)施(shi)(shi)工(gong)(gong)(gong)，擠(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)工(gong)(gong)(gong)程(cheng)

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鉆孔(kong)灌(guan)注樁(zhuang)后注漿施工中應(ying)何控制。

一、方案審查控制

鉆孔灌注(zhu)樁后(hou)注(zhu)漿(jiang)技(ji)術(shu)(shu)施(shi)(shi)工，樓房沉管擠密樁施(shi)(shi)工，施(shi)(shi)工單位除(chu)了要(yao)編(bian)制鉆孔灌注(zhu)樁施(shi)(shi)工方案(an)外，還需編(bian)制注(zhu)漿(jiang)技(ji)術(shu)(shu)的專項施(shi)(shi)工方案(an)，提(ti)供各(ge)種(zhong)注(zhu)漿(jiang)參數(shu)。

后注(zhu)漿技術是一種新技術，不(bu)同的(de)(de)施工(gong)單位(wei)，因其(qi)人(ren)員的(de)(de)技術水(shui)(shui)平、機械設(she)備及工(gong)程(cheng)所(suo)在(zai)地工(gong)程(cheng)土(tu)物(wu)理(li)力(li)學性質和(he)賦(fu)存狀態的(de)(de)不(bu)同，選擇(ze)的(de)(de)參數不(bu)盡相同。因此，監理(li)人(ren)員要依(yi)據掌(zhang)握的(de)(de)施工(gong)技術知識、實際(ji)經驗、相關資(zi)料(liao)和(he)有關規范、標準，對方(fang)案選取的(de)(de)參數進行認(ren)真(zhen)的(de)(de)審查。審核的(de)(de)參數主要有：開塞時間、開塞壓力(li)、注(zhu)漿壓力(li)、注(zhu)入水(shui)(shui)泥(ni)的(de)(de)預(yu)控量。

二、鉆孔控制

鉆孔控制主(zhu)要依(yi)據相關規范的要求(qiu)進行控制。

鉆孔(kong)控制主要依據《建(jian)筑地基(ji)基(ji)礎工(gong)程質量施工(gong)驗(yan)收規(gui)范(fan)》《建(jian)筑樁基(ji)技術規(gui)范(fan)》的相關要求和設計規(gui)范(fan)進行控制，重點控制孔(kong)深、孔(kong)徑(jing)和垂(chui)直度(du)，了解(jie)孔(kong)壁(bi)情(qing)況(kuang)，及時(shi)了解(jie)孔(kong)內情(qing)況(kuang)，是否有(you)坍孔(kong)、漏水等現象，以便在后注漿施工(gong)時(shi)采取相應的技術措(cuo)施。

擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)基施工(gong)(gong)(gong)(gong)，灰(hui)土(tu)(tu)擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施工(gong)(gong)(gong)(gong)，環保擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施工(gong)(gong)(gong)(gong)，水泥土(tu)(tu)擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施工(gong)(gong)(gong)(gong)，素土(tu)(tu)擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施工(gong)(gong)(gong)(gong)，夯擴擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施工(gong)(gong)(gong)(gong)，沉管(guan)擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施工(gong)(gong)(gong)(gong)，強夯地基施工(gong)(gong)(gong)(gong)，碎石擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施工(gong)(gong)(gong)(gong)，擠(ji)(ji)(ji)密(mi)(mi)螺(luo)紋樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施工(gong)(gong)(gong)(gong)，鉆孔(kong)灌注樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施工(gong)(gong)(gong)(gong)，軟(ruan)土(tu)(tu)地基施工(gong)(gong)(gong)(gong)，灰(hui)土(tu)(tu)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施工(gong)(gong)(gong)(gong)，我公司主(zhu)營：擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)施工(gong)(gong)(gong)(gong)，擠(ji)(ji)(ji)密(mi)(mi)樁(zhuang)(zhuang)(zhuang)(zhuang)(zhuang)工(gong)(gong)(gong)(gong)程

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樁基礎施工測量

高(gao)程(cheng)(cheng)測(ce)量(liang)：高(gao)程(cheng)(cheng)引測(ce)之(zhi)前首先要設置(zhi)水準點(dian)(dian)，設置(zhi)的原則主(zhu)要是便于(yu)(yu)保存與使用(yong)，數量(liang)上一般(ban)于(yu)(yu)多余(yu)2~3個。待設置(zhi)水準點(dian)(dian)完成后，高(gao)程(cheng)(cheng)測(ce)量(liang)應該按照(zhao)四等水準測(ce)量(liang)方法(fa)(fa)和要求進行，其往(wang)返較差(cha)，附合或環線(xian)閉合差(cha)不應大于(yu)(yu)20L，L為水準路線(xian)長(chang)度，單位為km，樁位點(dian)(dian)高(gao)程(cheng)(cheng)測(ce)量(liang)的測(ce)量(liang)方法(fa)(fa)一般(ban)為普(pu)通水準儀散點(dian)(dian)法(fa)(fa)，誤差(cha)上不應超過1cm。

建筑(zhu)(zhu)物軸線(xian)測(ce)(ce)設(she)(she)：根據設(she)(she)計(ji)圖紙(zhi)上(shang)注明的測(ce)(ce)量(liang)控制(zhi)點或(huo)基(ji)(ji)準(zhun)線(xian)來進行(xing)建筑(zhu)(zhu)物樁(zhuang)基(ji)(ji)礎的定位(wei)測(ce)(ce)量(liang)，通常取決于項目設(she)(she)計(ji)所提供的測(ce)(ce)量(liang)控制(zhi)點或(huo)基(ji)(ji)準(zhun)線(xian)與新建筑(zhu)(zhu)物的相關數(shu)據來進行(xing)，順(shun)序(xu)上(shang)首先測(ce)(ce)設(she)(she)建筑(zhu)(zhu)物定位(wei)矩形(xing)控制(zhi)網，然后測(ce)(ce)設(she)(she)建筑(zhu)(zhu)物樁(zhuang)位(wei)軸線(xian)，后測(ce)(ce)設(she)(she)承(cheng)臺樁(zhuang)位(wei)。

測量質量控制

在架設建(jian)筑物定位(wei)(wei)矩形(xing)網點的(de)過(guo)程中(zhong)，要埋(mai)設直徑為8cm，長度為35cm的(de)木樁，公路(lu)沉(chen)管擠密樁施工，埋(mai)設的(de)位(wei)(wei)置首(shou)先要便(bian)于作業，其次(ci)要便(bian)于保(bao)存(cun)，建(jian)議在木樁上的(de)中(zhong)心位(wei)(wei)置做好標記(ji)，木樁要使用水泥(ni)做加固保(bao)護，并定期做安全(quan)檢查。

對(dui)于工(gong)(gong)期(qi)較(jiao)長或規(gui)模較(jiao)大的工(gong)(gong)程應(ying)該埋設頂部為10cm×10cm，底(di)部為12cm×12cm，長80cm的水泥樁作為長期(qi)控制點。

必須加強檢查(cha)工作，包括樁位(wei)測(ce)量放(fang)線圖的(de)(de)所有計算數據。必須經(jing)第二個(ge)人進行的(de)(de)檢查(cha)，確認(ren)無誤后才(cai)(cai)能(neng)到(dao)現場(chang)測(ce)設。在(zai)建(jian)筑物(wu)定(ding)位(wei)測(ce)量成果(guo)經(jing)檢查(cha)滿足(zu)要求(qiu)后，才(cai)(cai)能(neng)測(ce)設建(jian)筑物(wu)樁位(wei)軸線進行建(jian)筑物(wu)的(de)(de)定(ding)位(wei)測(ce)量。