探矿工程-岩土钻掘工程
探礦工程-巖土鑽掘工程
탐광공정-암토찬굴공정
EXPLORATION ENGINEERING (DRILLING & TUNNELING)
2015年
4期
63-67
,共5页
软土地基%竖向荷载%水平承载力%水平载荷试验%预制方桩%单桩%群桩
軟土地基%豎嚮荷載%水平承載力%水平載荷試驗%預製方樁%單樁%群樁
연토지기%수향하재%수평승재력%수평재하시험%예제방장%단장%군장
soft soil foundation%vertical load%horizontal bearing capacity%horizontal load test%prefabricated square-pile%single pile%pile group
石油化工装置具有高、大、重及对地基承载力和沉降变形要求严格等特点，宁波镇海某石油化工项目位于沿海软土地基，工程地质条件差，风荷载大，对桩基的水平承载力要求较高。为了取得符合工程实际情况的桩基水平承载力参数，在工作区内开展了不同桩径、桩长、桩顶竖向荷载作用下的预制方桩桩基的水平静载荷试验。试验结果表明，在桩顶自由条件下，单桩水平承载力随着桩径和桩长的增加而增大，但并非是线性增长，而是呈幂函数增长关系；单桩水平承载力随着桩顶竖向荷载的增加同样呈幂函数增长关系；群桩水平承载力大于单桩水平承载力之和。
石油化工裝置具有高、大、重及對地基承載力和沉降變形要求嚴格等特點，寧波鎮海某石油化工項目位于沿海軟土地基，工程地質條件差，風荷載大，對樁基的水平承載力要求較高。為瞭取得符閤工程實際情況的樁基水平承載力參數，在工作區內開展瞭不同樁徑、樁長、樁頂豎嚮荷載作用下的預製方樁樁基的水平靜載荷試驗。試驗結果錶明，在樁頂自由條件下，單樁水平承載力隨著樁徑和樁長的增加而增大，但併非是線性增長，而是呈冪函數增長關繫；單樁水平承載力隨著樁頂豎嚮荷載的增加同樣呈冪函數增長關繫；群樁水平承載力大于單樁水平承載力之和。
석유화공장치구유고、대、중급대지기승재력화침강변형요구엄격등특점，저파진해모석유화공항목위우연해연토지기，공정지질조건차，풍하재대，대장기적수평승재력요구교고。위료취득부합공정실제정황적장기수평승재력삼수，재공작구내개전료불동장경、장장、장정수향하재작용하적예제방장장기적수평정재하시험。시험결과표명，재장정자유조건하，단장수평승재력수착장경화장장적증가이증대，단병비시선성증장，이시정멱함수증장관계；단장수평승재력수착장정수향하재적증가동양정멱함수증장관계；군장수평승재력대우단장수평승재력지화。
Petrochemical device is high, large and heavy, for which, the bearing capacity of foundation and the settlement deformation should be strictly controlled.The paper presents a petrochemical project in soft soil of Ningbo, because of the poor engineering geological conditions and large wind load, the horizontal bearing capacity is a very important factor.In or-der to achieve the horizontal bearing capacity parameters of pile foundation in accordance with the practical conditions, the horizontal static load test on the foundation of prefabricated square-pile is carried out under the conditions of different pile diameters, pile lengths and vertical loads on pile top in working area.The test results show that when the pile top is under the free condition, the horizontal bearing capacity of single pile increases along with the increase of diameter and the length of the pile, not being linear growth, but the power function relation.The horizontal bearing capacity of single pile increases along with the increase of vertical load on pile top, and also with power function relation.The horizontal bearing capacity of pile group is larger than the sum of that of single piles.
