本文選題：松軟地層　切入點(diǎn)：脈動(dòng)灌漿　出處：《巖土工程學(xué)報(bào)》2016年02期 　論文類型：期刊論文

【摘要】：漿體封閉脈動(dòng)灌漿是松軟地層防滲加固的有效手段,但封孔漿體的止?jié){機(jī)制尚不明確�；诠こ虜嗔蚜W(xué)以及賓漢姆流體同心環(huán)狀劈裂流動(dòng)模型,對(duì)脈動(dòng)灌漿封孔漿體的止?jié){機(jī)制進(jìn)行了定性分析,并基于能量守恒,推導(dǎo)出了脈動(dòng)灌漿封孔漿體止?jié){的控制方程。分析了脈動(dòng)灌漿封孔漿體的止?jié){能力與漿液流變性能、封孔漿體性能以及脈動(dòng)頻率的關(guān)系,封孔漿體的承載極限灌漿壓力隨漿液塑性黏度和屈服應(yīng)力的增大而增大,隨封孔漿體塑性強(qiáng)度的增大呈線性增加,隨脈動(dòng)持續(xù)時(shí)間的增加而減小,隨脈動(dòng)間隔時(shí)間的增大而增大,隨封孔高度的增加不斷增大。利用自制室內(nèi)試驗(yàn)裝置,驗(yàn)證了脈動(dòng)灌漿封孔漿體的止?jié){機(jī)制。在南水北調(diào)中線河南鶴壁段引水渠邊坡防滲工程中,針對(duì)松軟地質(zhì)條件,采用封孔漿體止?jié){技術(shù)對(duì)邊坡工程進(jìn)行了自下而上分段脈動(dòng)灌漿,灌后抽水試驗(yàn)表明地層滲透系數(shù)達(dá)到10-5~10-6cm/s,對(duì)比傳統(tǒng)灌漿工藝節(jié)省20%工作量。
[Abstract]:Slurry sealing pulsating grouting is an effective method for seepage prevention and reinforcement of soft ground, but the mechanism of slurry blocking is not clear. Based on engineering fracture mechanics and Bingham fluid concentric annular split flow model, The mechanism of pulsating grouting sealing slurry is qualitatively analyzed. Based on the conservation of energy, the governing equation of pulsating grouting sealing slurry is derived. With the increase of plastic viscosity and yield stress, the ultimate grouting pressure increases linearly with the increase of plastic strength. The pulsation duration decreases with the increase of pulsation duration, increases with the increase of pulsation interval time, and increases with the increase of sealing height. The mechanism of pulsating grouting sealing slurry is verified. In the seepage prevention project of the diversion canal slope in Henan Hebi section of the South-to-North Water transfer Project, the soft geological conditions are considered. The bottom up pulsating grouting of slope engineering was carried out by using the technology of blocking slurry with hole sealing. The pumping test after irrigation showed that the formation permeability coefficient reached 10 ~ (-5) ~ 10 ~ (-6) cm 路s ~ (-1), which saved 20% workload compared with the traditional grouting technology.
【作者單位】： 長(zhǎng)沙理工大學(xué)水利工程學(xué)院;湖南省水利水電科學(xué)研究所;湖南宏禹水利水電巖土工程有限公司;
【分類號(hào)】：TV43

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