岩石力学与工程学报
巖石力學與工程學報
암석역학여공정학보
CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING
2015年
z1期
3588-3596
,共9页
桩基工程%冲孔灌注桩%水平静载%后注浆%水平抗力%临界荷载
樁基工程%遲孔灌註樁%水平靜載%後註漿%水平抗力%臨界荷載
장기공정%충공관주장%수평정재%후주장%수평항력%림계하재
pile foundations%bored piles%static load test%grouting technique%lateral soil resistance%critical load
通过分析某地区冲孔灌注桩水平静载试验结果，对桩侧、桩端后注浆技术在冲孔灌注桩承受水平荷载工况下的应用效果进行了试验研究，结果表明：(1)冲孔灌注桩水平承载力特征值、临界值以及极限值主要取决于桩土之间的相互作用力；(2)通过比较单桩与后注浆单桩试验结果，后注浆桩基水平临界荷载提高了25%，极限荷载提高了14.3%；(3)后注浆单桩桩侧土水平抗力系数的比例系数提高了57%；(4)对于双桩承台，后注浆承台实测值相对比于未注浆承台的计算值，其水平临界荷载值提高了33.7%；(5)基于各种土层变形模量与桩侧地基土水平抗力系数的比例系数m值的关系，建立了土层变形模量与m值的直线型关系式，并推导出了后注浆桩周土层的复合压缩模量表达式，给出了计算后注浆桩周土的m值计算方法。试验与计算均表明：采用桩侧桩端后注浆技术，可较显著的提高冲孔灌注桩的水平承载力。
通過分析某地區遲孔灌註樁水平靜載試驗結果，對樁側、樁耑後註漿技術在遲孔灌註樁承受水平荷載工況下的應用效果進行瞭試驗研究，結果錶明：(1)遲孔灌註樁水平承載力特徵值、臨界值以及極限值主要取決于樁土之間的相互作用力；(2)通過比較單樁與後註漿單樁試驗結果，後註漿樁基水平臨界荷載提高瞭25%，極限荷載提高瞭14.3%；(3)後註漿單樁樁側土水平抗力繫數的比例繫數提高瞭57%；(4)對于雙樁承檯，後註漿承檯實測值相對比于未註漿承檯的計算值，其水平臨界荷載值提高瞭33.7%；(5)基于各種土層變形模量與樁側地基土水平抗力繫數的比例繫數m值的關繫，建立瞭土層變形模量與m值的直線型關繫式，併推導齣瞭後註漿樁週土層的複閤壓縮模量錶達式，給齣瞭計算後註漿樁週土的m值計算方法。試驗與計算均錶明：採用樁側樁耑後註漿技術，可較顯著的提高遲孔灌註樁的水平承載力。
통과분석모지구충공관주장수평정재시험결과，대장측、장단후주장기술재충공관주장승수수평하재공황하적응용효과진행료시험연구，결과표명：(1)충공관주장수평승재력특정치、림계치이급겁한치주요취결우장토지간적상호작용력；(2)통과비교단장여후주장단장시험결과，후주장장기수평림계하재제고료25%，겁한하재제고료14.3%；(3)후주장단장장측토수평항력계수적비례계수제고료57%；(4)대우쌍장승태，후주장승태실측치상대비우미주장승태적계산치，기수평림계하재치제고료33.7%；(5)기우각충토층변형모량여장측지기토수평항력계수적비례계수m치적관계，건립료토층변형모량여m치적직선형관계식，병추도출료후주장장주토층적복합압축모량표체식，급출료계산후주장장주토적m치계산방법。시험여계산균표명：채용장측장단후주장기술，가교현저적제고충공관주장적수평승재력。
By analyzing thehorizontal static load test results of bored piles in certain area,experimental research on application effects for bored piles with pile lateral friction and tip resistance grouting technique are studied. The results show that:(1) The characteristic value,critical value and ultimate limit value of horizontal bearing capacity of bored piles depend mainly on the pile-soil interaction force. (2) By compared with test results of single pile,the critical load with grouting technique is increased by 25% and the ultimate value is increased by 14.3%. (3) The coefficient of pile lateral soil resistance coefficient of single pile with grouting technique is increased by 57%. (4) Compared with the calculated results for two piles cap,the value of horizontal critical load for two piles cap with grouting technique is increased by 33.7%. (5) Based on the relationship between a variety of soil deformation modulus and itsm values,a linear equation about deformation modulus andm value is proposed and the expression of grouting soil composite compression modulus is deduced. The calculation method aboutm value of grouting soil is proposed. Tests and calculation demonstrate that by adopting grouting technique with pile lateral friction andtip resistance,the value of horizontal capacity of bored piles can be improved significantly.
