本文選題：吹填土 + 真空預(yù)壓�。� 參考：《水利水運(yùn)工程學(xué)報(bào)》2017年02期

【摘要】：河湖清淤吹填土含水率高,流動(dòng)性大,具有污染性。無(wú)砂真空排水預(yù)壓法在固結(jié)硬化吹填土,提高其強(qiáng)度和承載力方面效果顯著。受環(huán)形流道、落淤分選的影響,同一堆泥場(chǎng)內(nèi)不同區(qū)域的地基沉降和超靜孔壓的變化存在一定差異性。無(wú)砂真空預(yù)壓法具有較好的阻隔、過(guò)濾、吸附有機(jī)污染物等凈化功能,經(jīng)歷堆置沉淀、負(fù)壓抽吸、尾水沉淀和水生植物過(guò)濾吸附后排放的水體中有機(jī)質(zhì)和總磷(TP)含量大幅減小,污染綜合指數(shù)由0.8~1.0降到0.7,基本滿(mǎn)足地表水Ⅲ類(lèi)水質(zhì)標(biāo)準(zhǔn)要求。固結(jié)后吹填土中的有機(jī)質(zhì)、總氮、總磷含量大幅度降低,有機(jī)污染指數(shù)提高了1個(gè)等級(jí)。重金屬含量符合土壤環(huán)境質(zhì)量Ⅲ類(lèi)標(biāo)準(zhǔn),重金屬的浸出毒性指標(biāo)低,對(duì)地表水無(wú)污染,重金屬污染程度的計(jì)算評(píng)價(jià)結(jié)果總體為輕微。
[Abstract]:River and lake dredging and filling have high moisture content, high fluidity and pollution. The sand-free vacuum drainage preloading method can improve the strength and bearing capacity of consolidation hardened fill. Due to the influence of annular channel and sedimentation separation, there are some differences in the variation of foundation settlement and superstatic pore pressure in different areas of the same pile of mud field. Vacuum preloading without sand has good purification functions such as blocking, filtering, adsorption of organic pollutants, etc. The contents of organic matter and total phosphorus in the discharged water body have been greatly reduced after heap precipitation, negative pressure suction, tail water precipitation and aquatic plant filtration and adsorption. The comprehensive index of pollution was reduced from 0.8 ~ 1.0 to 0.7, which basically met the requirements of water quality standards of class 鈪，

本文編號(hào)：2008083