1江蘇省高速公路工程石灰粉煤灰穩(wěn)定土路面底基層施工指導(dǎo)意見.doc
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路面底基層是在基層下鋪筑的承重層，江蘇高速公路路面，采用石灰、粉煤灰穩(wěn)定土（簡稱二灰土）底基層，結(jié)構(gòu)厚度20cm。
高速公路施工難度大、技術(shù)要求高，因而在路面施工中，必須層層把關(guān)，嚴(yán)格要求。從底基層應(yīng)給予高度重視，防止在二灰土底基層施工中出現(xiàn)原材料質(zhì)量不合格、配合比不準(zhǔn)確、拌和不均勻、碾壓不密實、接縫不平整等質(zhì)量弊病，避免出現(xiàn)粘土夾層、起皮、松散、裂縫、彈簧、翻漿等質(zhì)量缺陷，以確保路面底基層的工程質(zhì)量。
根據(jù)交通部標(biāo)準(zhǔn)JTJ034-2000《公路路面基層施工技術(shù)規(guī)范》結(jié)合江蘇已建成高速公路路面施工經(jīng)驗，對路面二灰土底基層施工，提出如下指導(dǎo)意見。
一、 準(zhǔn)備工作
1、 必須配備齊全的施工機具和配件，做好開工前的保養(yǎng)、試機
工作，并保證在施工期間一般不發(fā)生有礙施工進度和質(zhì)量的故障。底基層采用單幅路拌法一層攤鋪施
r road sub-base under the pavement at the grassroots level of load-bearing layer, Jiangsu Expressway road, using lime, fly ash stabilized soil (referred to as lime and fly ash) sub-base, structural thickness of 20cm.
Highway construction difficult, technically demanding and therefore road construction, must be checks at each level, strict requirements. From the sub-base should be given high priority to prevent the sub-base construction in lime and inferior quality of raw materials appear to meet the ratio is not accurate, uniform mixing, rolling is not dense, uneven joints and other quality defects, to avoid the clay interlayer, since Paper, loose, cracks, springs, boiling and other defects, to ensure that the road sub-base of the project quality.
According to the Ministry of Communications standards JTJ034-2000 "Specification for Highway Pavement Base Construction" combined with Jiangsu Expressway road construction experience has been built on the road sub-base construction of the second lime, the following guidance.
First, preparatory work
1, must be equipped with a full range of construction machinery and accessories, do pre-construction maintenance, testing machine
Work, and to ensure that generally do not occur during the construction impede construction progress and quality of fault. Sub-base layer with single width road paving mix Method Shi