skjc-安江高速公路隧檢大青山簡(jiǎn)報(bào)

1、大青山隧道 2014-012 期檢測(cè)臨1、檢測(cè)內(nèi)容根據(jù)現(xiàn)場(chǎng)施工進(jìn)度，本次檢測(cè)作業(yè)范圍為：1B 標(biāo)大青山隧道進(jìn)口右告身段長(zhǎng)90m，樁號(hào)范圍為 YK8+740YK8+830 初期支護(hù)段。檢測(cè)項(xiàng)目為：錨桿長(zhǎng)度與注漿飽和度抽檢、噴射混凝土襯砌厚度、支護(hù)（襯砌）背后的空洞、鋼支撐間距檢測(cè)。2、檢測(cè)依據(jù)1.工程測(cè)量規(guī)范GB50026-20072.公路隧道設(shè)計(jì)規(guī)范JTG D70-20043.公路隧道施工技術(shù)規(guī)范JTG F60-20094.公路工程地質(zhì)勘察規(guī)范JTG C20-20115.公路工程質(zhì)量檢驗(yàn)評(píng)定標(biāo)準(zhǔn)JTG F80/1-20046.錨桿噴射混凝土支護(hù)技術(shù)規(guī)范GB 50086-20017.錨桿錨固質(zhì)量

2、無損檢測(cè)技術(shù)規(guī)程JGJ/T 182-20098.鉆芯法檢測(cè)混凝土強(qiáng)度技術(shù)規(guī)程CECS 03:20079.鐵路隧道襯砌質(zhì)量無損檢測(cè)規(guī)程TB 10223-200410.公路隧道施工技術(shù)細(xì)則JTG/T F60-200911.安江高速（江口至）高速公路兩階段施工圖設(shè)計(jì)3、檢測(cè)結(jié)果3.1 錨桿長(zhǎng)度與注漿飽和度檢測(cè)結(jié)果錨桿長(zhǎng)度與注漿飽和度檢測(cè)頻率按合同文件規(guī)定頻率抽檢（級(jí)圍巖抽檢3%，級(jí)圍巖抽檢 1%，級(jí)圍巖抽檢 0.2%），如現(xiàn)場(chǎng)錨桿端頭已被初噴覆蓋或無錨桿，則因現(xiàn)場(chǎng)情況而定。錨桿長(zhǎng)度與注漿飽和度采用錨桿質(zhì)量檢測(cè)儀檢測(cè)。按照錨桿錨固質(zhì)量無損檢測(cè)技術(shù)規(guī)范（JGJ/T 182-2009）要求，錨桿長(zhǎng)度及注漿

3、飽滿度評(píng)定方法為：檢測(cè)長(zhǎng)度不小于設(shè)計(jì)長(zhǎng)度的 95%、且不足長(zhǎng)度超過 0.5m 的錨桿，可長(zhǎng)度合格；單根錨桿錨固質(zhì)量等級(jí)全部達(dá)到級(jí)以上的合格，否則不合格；（錨固質(zhì)量分級(jí)如下：飽滿度90%、且長(zhǎng)度合格；：飽滿度 90%80%、且長(zhǎng)度合格；：飽滿度 80%75%、且長(zhǎng)度合格；：飽滿度75%、或長(zhǎng)度不合格；）。本次檢測(cè)大青山隧道 YK8+740YK8+830 初支段共抽檢錨桿質(zhì)量 72 根，合格65 根，為 90.3%。表 1 大青山隧道錨桿長(zhǎng)度及注漿飽和度檢測(cè)結(jié)果表測(cè)試測(cè)試位置設(shè)計(jì)直徑(mm)設(shè)計(jì)長(zhǎng)度(m)檢測(cè)長(zhǎng)度(m)外露長(zhǎng)度(m)砂漿飽和度(%)總體評(píng)價(jià)1YK8+747(左邊墻)253.53.4

4、0.0189類2YK8+748(左邊墻)253.53.480.0597類3YK8+749(左邊墻)253.53.40.0599類4YK8+749.5(左邊墻)253.53.460.0698類5YK8+750(左邊墻)253.53.480.0596類6YK8+751(左邊墻)253.53.460.0379類7YK8+752(左邊墻)253.53.440.0681類8YK8+753(左邊墻)253.53.360.0595類9YK8+754(左邊墻)253.53.440.0197類10YK8+755(左邊墻)253.53.460.0578類11YK8+756(左邊墻)253.53.440.0290類

5、12YK8+757(左邊墻)253.53.430.0590類13YK8+758(左邊墻)253.53.460.0590類14YK8+759(左邊墻)253.53.420.0286類15YK8+760(左邊墻)253.53.430.0277類16YK8+761(左邊墻)253.53.480.0497類17YK8+762(左邊墻)253.53.470.0699類18YK8+763(左邊墻)253.53.460.0293類19YK8+764(左邊墻)253.53.340.0284類20YK8+765(左邊墻)253.53.560.0395類21YK8+766(左邊墻)253.53.410.0485類

6、22YK8+767(左邊墻)253.53.50.0296類23YK8+768(左邊墻)253.53.460.0585類24YK8+769(左邊墻)253.53.440.0297類25YK8+770(左邊墻)253.53.410.0597類26YK8+771(左邊墻)253.53.40.0297類27YK8+772(左邊墻)253.53.010.0280不合格28YK8+773(左邊墻)253.53.480.0599類29YK8+774(左邊墻)253.53.420.0298類30YK8+775(左邊墻)253.53.360.0593類31YK8+776(左邊墻)253.53.410.0586類

7、32YK8+777(左邊墻)253.53.390.0150不合格33YK8+778(左邊墻)253.53.390.0292類34YK8+779(左邊墻)253.53.430.0595類35YK8+780(左邊墻)253.53.470.0599類36YK8+781(左邊墻)253.53.450.0398類37YK8+782(左邊墻)253.52.920.0250不合格38YK8+783(左邊墻)253.53.380.0475類39YK8+784(左邊墻)253.53.440.0594類40YK8+785.5(左邊墻)253.53.380.0484類41YK8+786(左邊墻)253.53.450

8、.0491類42YK8+787(左邊墻)253.53.380.0585類43YK8+788(左邊墻)253.53.390.0684類44YK8+788.5(左邊墻)253.51.720.0788不合格45YK8+789(左邊墻)253.52.040.0482不合格46YK8+790(左邊墻)253.53.440.0577類47YK8+791(左邊墻)253.53.430.0788類48YK8+792(左邊墻)253.53.390.0597類49YK8+793(左邊墻)253.53.410.0598類50YK8+794(左邊墻)253.53.40.0595類51YK8+794(左邊墻)253.5

9、3.460.0698類52YK8+800(右邊墻)253.53.480.0587類53YK8+799(右邊墻)253.53.470.0596類54YK8+798(右邊墻)253.53.370.0285類55YK8+797(右邊墻)253.53.470.0794類56YK8+796(右邊墻)253.53.410.0497類57YK8+794(右邊墻)253.53.450.0489類58YK8+793(右邊墻)253.53.380.0193類59YK8+791(右邊墻)253.52.320.0288不合格60YK8+790(右邊墻)253.53.410.0397類61YK8+789(右邊墻)253

10、.53.370.0597類62YK8+788(右邊墻)253.53.450.0778類63YK8+787(右邊墻)253.53.460.0281類64YK8+785(右邊墻)253.53.410.0383類65YK8+782(右邊墻)253.53.420.0276類66YK8+780(右邊墻)253.53.440.0291類67YK8+778(右邊墻)253.53.470.0793類68YK8+776(右邊墻)253.53.390.0297類69YK8+775(右邊墻)253.53.460.0580類70YK8+773(右邊墻)253.52.290.0499不合格71YK8+772(右邊墻)2

11、53.53.450.0282類72YK8+770(右邊墻)253.53.490.0393類3.2 噴射混凝土厚度、支護(hù)背后的空洞檢測(cè)結(jié)果噴射混凝土厚度、支護(hù)背后的空洞檢測(cè)根據(jù) JTG F60-2009：平均厚度設(shè)計(jì)厚度；檢查點(diǎn)的 90%設(shè)計(jì)厚度；最小厚度0.5 倍設(shè)計(jì)厚度，且50mm”。JTG F60-2009：“空洞檢測(cè)：無空洞、無雜物”。本次在 YK8+740YK8+830 段共檢測(cè)噴射混凝土厚度，厚度均滿足設(shè)計(jì)要求，背后有 2 處空洞、3 處不密實(shí)。表 2 大青山隧道初期支護(hù)缺陷檢測(cè)結(jié)果表表 3 大青山隧道噴射混凝土厚度檢測(cè)結(jié)果表部位樁號(hào)襯砌類型右邊墻(cm)右拱腰(cm)拱頂(cm)左

12、拱腰(cm)左邊墻(cm)平均值(cm)設(shè)計(jì)值（cm）YK8+740S-Vc24.731.331.226.626.930.424YK8+75024.728.630.627.931.0YK8+76033.033.827.333.124.9YK8+77034.932.032.832.332.4YK8+78031.926.034.334.630.2YK8+79033.733.630.827.925.7YK8+800S-Vb32.326.526.928.026.4YK8+81034.331.634.424.534.9YK8+82033.526.434.226.531.3測(cè)線樁號(hào)測(cè)線部位缺陷位置（樁號(hào)）缺陷類型YK8+740YK8+830右邊墻YK8+765不密實(shí)右拱腰YK8+780不密實(shí)左邊墻左拱腰YK8不密實(shí)拱頂YK8+760、YK8+820脫空3.3 鋼支撐間距檢測(cè)結(jié)果鋼支撐間距檢測(cè)根據(jù)JTG F80/1-2004：“安裝間距，規(guī)定值或允許偏差50mm”。本次檢測(cè)作業(yè)范圍為 YK8+740YK8+830 鋼支撐間距詳見表 4。表 4 大青山隧道鋼支撐間距檢測(cè)結(jié)果表以下無正文序號(hào)里程實(shí)測(cè)值設(shè)計(jì)值備注數(shù)量（榀）平均間距（cm）數(shù)量（榀）間距（cm）是否滿足規(guī)范要求1YK8+740YK8+7906183.363.580滿足2YK8+7