五邑大学学报（自然科学版）
五邑大學學報（自然科學版）
오읍대학학보（자연과학판）
JOURNAL OF WUYI UNIVERSITY(NATURAL SCIENCE EDITION)
2015年
2期
31-37
,共7页
熊磊%李书杰%王列健%黄诗渊
熊磊%李書傑%王列健%黃詩淵
웅뢰%리서걸%왕렬건%황시연
基坑%降排水%渗流%有限元分析%浸润线%渗流量
基坑%降排水%滲流%有限元分析%浸潤線%滲流量
기갱%강배수%삼류%유한원분석%침윤선%삼류량
foundation pits%dewatering and drainage%seepage%finite element analyses%saturation lines%seepage flows
结合某沿海地区的大型挖入式海港的基坑降排水工程，基于二维渗流有限元法，对开挖基坑渗流量与止水帷幕距基坑开挖区的距离、基坑深度及止水帷幕入土深度之间的关系进行研究分析。结果表明：随着基坑开挖深度的增大，基坑海陆两侧渗流量均逐渐增加，当基坑深度达到20 m 以上时，海侧渗流量增幅显著增大，陆侧渗流量则继续保持缓慢增长趋势；随着止水帷幕与基坑开挖区距离的增加，海陆两侧渗流量均呈减小趋势，但减小幅度逐渐变小，在距离为100 m 时渗流量的降幅最大，当距离增大至300 m 以后，距离对渗流量的影响较小；随着止水帷幕入土深度的增加，基坑渗流量呈减小趋势，帷幕深入石灰岩层后，其深度增加则渗流量减小更为明显，在深度10～14 m 时降幅最大，但随着深度继续增加，防渗效果逐渐降低，建议止水帷幕入土深度尽可能达到14 m，以获得较为理想的防渗效果。
結閤某沿海地區的大型挖入式海港的基坑降排水工程，基于二維滲流有限元法，對開挖基坑滲流量與止水帷幕距基坑開挖區的距離、基坑深度及止水帷幕入土深度之間的關繫進行研究分析。結果錶明：隨著基坑開挖深度的增大，基坑海陸兩側滲流量均逐漸增加，噹基坑深度達到20 m 以上時，海側滲流量增幅顯著增大，陸側滲流量則繼續保持緩慢增長趨勢；隨著止水帷幕與基坑開挖區距離的增加，海陸兩側滲流量均呈減小趨勢，但減小幅度逐漸變小，在距離為100 m 時滲流量的降幅最大，噹距離增大至300 m 以後，距離對滲流量的影響較小；隨著止水帷幕入土深度的增加，基坑滲流量呈減小趨勢，帷幕深入石灰巖層後，其深度增加則滲流量減小更為明顯，在深度10～14 m 時降幅最大，但隨著深度繼續增加，防滲效果逐漸降低，建議止水帷幕入土深度儘可能達到14 m，以穫得較為理想的防滲效果。
결합모연해지구적대형알입식해항적기갱강배수공정，기우이유삼류유한원법，대개알기갱삼류량여지수유막거기갱개알구적거리、기갱심도급지수유막입토심도지간적관계진행연구분석。결과표명：수착기갱개알심도적증대，기갱해륙량측삼류량균축점증가，당기갱심도체도20 m 이상시，해측삼류량증폭현저증대，륙측삼류량칙계속보지완만증장추세；수착지수유막여기갱개알구거리적증가，해륙량측삼류량균정감소추세，단감소폭도축점변소，재거리위100 m 시삼류량적강폭최대，당거리증대지300 m 이후，거리대삼류량적영향교소；수착지수유막입토심도적증가，기갱삼류량정감소추세，유막심입석회암층후，기심도증가칙삼류량감소경위명현，재심도10～14 m 시강폭최대，단수착심도계속증가，방삼효과축점강저，건의지수유막입토심도진가능체도14 m，이획득교위이상적방삼효과。
In light of foundation pit drainage engineering of a big excavated port in China’s coastal area, based on the two-dimensional seepage finite element method, the foundation pit seepage flow, the distance from the stop-water heavy curtain to the foundation pit, relationship between the depth of the foundation pit excavation area and the stop-water heavy curtain were studied. The results show that with the increase of excavation depth, the foundation pit seepage flow gradually increased; when the foundation pit depth was more than 20 m, the sea side seepage flow increased significantly with the increase of the pit depth, and the land side seepage flow with minimal growth also increased; with the increase of the distance from the water-stop curtain to foundation pit excavation area, the foundation pit seepage flow was on a trend of decrease, but the range of decrease became smaller; the seepage flow declined most at the distance of 100 m, and when the distance increased to 300 m,the effect of distance on seepage flow was less. The seepage flow of foundation pit reduced with the increase of the depth of the water-stopping curtain, the impact of the increase of the depth on the reduced seepage flow became obvious when the curtain went deep into the limestone. The drop amplitude reached the largest at the depth of 10 m to 14 m, but with the increase of depth, the anti-seepage effect decreased gradually. It is suggested that the depth of the water-stop curtain just reach the value of 14m in order to achieve the ideal anti-seepage effect.
