發(fā)布時(shí)間：2018-11-11 07:36

【摘要】：山區(qū)公路邊坡截排水系統(tǒng)對(duì)于保障路基邊坡穩(wěn)定性具有十分重要的作用。以江西安遠(yuǎn)~定南高速公路為例,對(duì)贛南山區(qū)高速公路邊坡截排水技術(shù)進(jìn)行探討。邊坡排水工程可分為邊坡截水和邊坡排水:(1)地表截水措施常見為截水溝和阻水堤,地下截水措施可采用充氣截排水;(2)挖方路段地表排水設(shè)施主要由截水溝、平臺(tái)溝(急流槽)及邊溝組成,邊溝下設(shè)縱向盲溝,填方路段主要由排水溝和涵洞組成,填挖方段坡面常設(shè)置泄水孔排除地下水,排水洞、水平排水孔、盲溝及豎井皆可應(yīng)用。截排水的目的是確保路基邊坡的穩(wěn)定,針對(duì)贛南地區(qū)邊坡5種常見的破壞模式,即沿原有結(jié)構(gòu)面滑動(dòng)、沿頂部拉裂滑動(dòng)、土體拉裂-崩塌、圓弧形滑動(dòng)、表面沖刷,分析水在破壞過程中所起的作用,提出相應(yīng)的截排水對(duì)策。以區(qū)域工程地質(zhì)條件為基礎(chǔ),結(jié)合贛南地區(qū)降雨量大的特點(diǎn),對(duì)常用的設(shè)計(jì)方案提出3點(diǎn)優(yōu)化建議:(1)變坡點(diǎn)及彎道附近,將邊溝適當(dāng)加寬或增設(shè)橫向排水管,并增加槽身粗糙度;(2)土質(zhì)高邊坡地下水豐富路段增設(shè)砂井,采用泄水孔穿連砂井;(3)對(duì)多節(jié)理裂隙巖質(zhì)破碎路段進(jìn)行注漿處理,將泄水孔加密,并使與節(jié)理裂隙面大角度相交,以21°~36°為最佳。
[Abstract]:The drainage system of highway slope in mountainous area plays an important role in ensuring the stability of roadbed slope. Taking Anyuan-Dingnan Expressway in Jiangxi Province as an example, the technique of cutting and drainage of expressway slope in Gannan Mountain area is discussed. Slope drainage works can be divided into slope interception and slope drainage: (1) the surface water interception measures are commonly used as gully and embankment; (2) the surface drainage facilities of the excavated section are mainly composed of intercepting gullies, platform trenches (jet channels) and edge ditches. There are longitudinal blind ditches under the edge trenches, and the fill sections are mainly composed of drainage ditches and culverts. Drainage holes are often set up on the slope of the fill and excavation sections to remove groundwater. Drainage holes, horizontal drainage holes, blind ditches and shafts can be used. The purpose of intercepting drainage is to ensure the stability of roadbed slope. In view of the five common failure modes of slope in south Jiangxi province, that is, sliding along the original structural plane, sliding along the top of the structure, pulling and collapsing of soil, arc sliding, and surface scouring, The function of water in the process of destruction is analyzed, and the corresponding countermeasures of intercepting and drainage are put forward. Based on the regional engineering geological conditions and the characteristics of heavy rainfall in south Jiangxi, three optimization suggestions are put forward for the commonly used design schemes: (1) widen the side gully properly or add the lateral drainage pipe in the vicinity of the variable slope point and the bend. And increase the roughness of the groove body; (2) the sand wells are added in the section of rich underground water on the high soil slope, and the drainage holes are used to penetrate the sand wells; (3) grouting treatment is carried out on the broken section of multi-joint fractured rock, the drainage hole is infilled and the joint fissure surface is intersected at a large angle, 21 擄~ 36 擄is the best.
【作者單位】： 江西省高速公路投資集團(tuán)有限責(zé)任公司;中國(guó)地質(zhì)大學(xué)(武漢)工程學(xué)院;
【基金】：江西省交通運(yùn)輸廳科技計(jì)劃項(xiàng)目,項(xiàng)目編號(hào)2015c0026
【分類號(hào)】：U417.3

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