【摘要】：針對(duì)現(xiàn)有雙環(huán)注水試驗(yàn)裝置在高滲透性土體中應(yīng)用時(shí)的缺陷,研制了一套輪換注水式雙環(huán)注水試驗(yàn)裝置。該裝置由注水系統(tǒng)和供水系統(tǒng)組成,巧妙地采用了在內(nèi)環(huán)、外環(huán)中分別設(shè)置兩組流量瓶向環(huán)內(nèi)輪換注水,外接水箱向注空的流量瓶中供水的結(jié)構(gòu)設(shè)計(jì),保證了試驗(yàn)過程環(huán)內(nèi)水頭高度的穩(wěn)定和連續(xù)注水。采用新研制的試驗(yàn)裝置測(cè)試安哥拉格埃路地層(Quelo)棕紅色砂土的滲透系數(shù),獲得了滿意的應(yīng)用效果。試驗(yàn)結(jié)果表明:安哥拉Quelo砂在天然狀態(tài)下的滲透系數(shù)在10~(-3)~10~(-2) cm/s數(shù)量級(jí),經(jīng)壓實(shí)后(重型擊實(shí)試驗(yàn)控制,壓實(shí)系數(shù)λ≥0.95)可降低1~3個(gè)數(shù)量級(jí);在同一孔隙比下,現(xiàn)場(chǎng)雙環(huán)注水試驗(yàn)結(jié)果高于室內(nèi)變水頭滲透試驗(yàn)結(jié)果約0.5個(gè)數(shù)量級(jí)。
[Abstract]:In view of the defects of the existing double ring water injection test device in high permeability soil, a set of rotation double ring water injection test device was developed. The device consists of a water injection system and a water supply system. The structure design of water supply in the inner ring and the outer ring is skillfully adopted. Two groups of flow bottles are arranged in the inner ring and the outer ring respectively to rotate water injection into the ring, and the external water tank supplies water to the empty flow bottle. The stability of the head height in the ring and the continuous water injection are ensured during the test. The permeability coefficient of (Quelo) brown-red sand in Geelu formation of Angola has been tested with a newly developed test device and satisfactory application results have been obtained. The results show that the permeability coefficient of Angolan Quelo sand in natural state ranges from 10 ~ (-3) to 10 ~ (-2) cm/s, and the compaction coefficient 位 鈮，

本文編號(hào)：2285429