东南大学学报(自然科学版)
東南大學學報(自然科學版)
동남대학학보(자연과학판)
Journal of Southeast University (Natural Science Edition)
2015年
5期
947-951
,共5页
遮帘式板桩码头结构%遮帘效应%墙桩间距%平均侧压力系数
遮簾式闆樁碼頭結構%遮簾效應%牆樁間距%平均側壓力繫數
차렴식판장마두결구%차렴효응%장장간거%평균측압력계수
sheet-pile barrier wharf structure%barrier effect%wall pile spacing%average lateral earth pressure coefficient
为了研究墙桩间距对遮帘效应的影响,利用京唐港32#原型观测试验揭示了遮帘式板桩码头结构的遮帘效应。分别采用离心模型试验和有限元模拟,对比码头开挖前后以及不同墙桩间距下前墙平均侧土压力系数、土压力分布及水平位移的变化情况。结果表明,码头开挖前,无遮帘桩情况下,前墙上平均侧土压力系数最大,且随墙桩间距的增大而减小;码头开挖后,随着墙桩间距的增大,前墙水平位移、前墙陆侧上土压力以及前墙与遮帘桩的相对水平位移增大,前墙陆侧对应桩间侧与对应桩侧上的土压力差值则逐渐减小。在实际工程施工条件允许的情况下,墙桩间距越小,遮帘式板桩码头结构的遮帘效应越明显。
為瞭研究牆樁間距對遮簾效應的影響,利用京唐港32#原型觀測試驗揭示瞭遮簾式闆樁碼頭結構的遮簾效應。分彆採用離心模型試驗和有限元模擬,對比碼頭開挖前後以及不同牆樁間距下前牆平均側土壓力繫數、土壓力分佈及水平位移的變化情況。結果錶明,碼頭開挖前,無遮簾樁情況下,前牆上平均側土壓力繫數最大,且隨牆樁間距的增大而減小;碼頭開挖後,隨著牆樁間距的增大,前牆水平位移、前牆陸側上土壓力以及前牆與遮簾樁的相對水平位移增大,前牆陸側對應樁間側與對應樁側上的土壓力差值則逐漸減小。在實際工程施工條件允許的情況下,牆樁間距越小,遮簾式闆樁碼頭結構的遮簾效應越明顯。
위료연구장장간거대차렴효응적영향,이용경당항32#원형관측시험게시료차렴식판장마두결구적차렴효응。분별채용리심모형시험화유한원모의,대비마두개알전후이급불동장장간거하전장평균측토압력계수、토압력분포급수평위이적변화정황。결과표명,마두개알전,무차렴장정황하,전장상평균측토압력계수최대,차수장장간거적증대이감소;마두개알후,수착장장간거적증대,전장수평위이、전장륙측상토압력이급전장여차렴장적상대수평위이증대,전장륙측대응장간측여대응장측상적토압력차치칙축점감소。재실제공정시공조건윤허적정황하,장장간거월소,차렴식판장마두결구적차렴효응월명현。
In order to study the influence of wall pile spacing on barrier effect,the Jingtang 32#proto-type observation experiment was carried out to reveal the barrier effect of sheet-pile barrier wharf struc-ture.The centrifuge experiments and the finite element models were used to contrast the changes of the average lateral earth pressure coefficient,the distribution of earth pressure and the horizontal displace-ment on the front wall before and after excavation with different wall pile spacings.The results show that before excavation and without barrier piles,the average lateral earth pressure coefficient on the front wall can achieve the maximum value,and it decreases with the increase of the wall pile spacing. After excavation,with the increase of the wall pile spacing,the horizontal displacement,the earth pressure on the front wall and the relative horizontal displacement between the front wall and the barri-er piles increase,but the difference value of the earth pressure between corresponding pile lateral and piles decreases.With the permission of the actual engineering conditions,the barrier effect of the sheet-pile barrier wharf structure becomes more obvious with the decrease of the wall pile spacing.