工程地质学报
工程地質學報
공정지질학보
2015年
3期
420-428
,共9页
桩-锚结构造价%关系曲线%多项式拟合%优化的变形协调条件%锚索拉力
樁-錨結構造價%關繫麯線%多項式擬閤%優化的變形協調條件%錨索拉力
장-묘결구조개%관계곡선%다항식의합%우화적변형협조조건%묘색랍력
The cost of pile-anchor cable structure%Relation curve%Polynomial fitting%Optimized deformation consistence condition%Anchor cable tensile force
桩－锚结构的计算包括锚索拉力计算和桩身内力计算，通过锚索拉力计算桩身内力，再通过桩身内力计算结构造价，锚索拉力将影响桩－锚结构造价的计算，因此，锚索拉力计算对桩－锚结构设计尤为重要。通过对桩－锚结构造价与锚索拉力之间的关系进行分析研究，从桩－锚结构造价与锚索拉力的关系曲线、多项式拟合以及优化的变形协调条件3个方面建立与桩－锚结构造价相匹配的锚索拉力的计算模型。结合桩身内力计算的“m”法和“K”法以及结构力学中的虚功原理和图乘法理论，编写 Visual C＋＋计算程序，通过不同的滑坡工程实例对不同锚索拉力作用下的桩－锚结构造价进行计算，获得锚索拉力与桩－锚结构造价的关系图。计算结果表明：桩－锚结构造价是随着锚索拉力的增大先减小后增加的。关系曲线模型和多项式拟合模型计算的与桩－锚结构最低造价相匹配的锚索拉力与优化的变形协调条件计算的锚索拉力十分接近，可选择其中任意一种计算方法计算得到的锚索拉力作为最终锚索拉力计算值。此时，桩身弯矩的正负极值并不相等，这也表明桩身正负弯矩的极值相等时的锚索拉力并不一定是最优的锚索拉力，因为此时桩身所处的受力状态虽然比较理想，但造价可能较高，经济效益不佳。
樁－錨結構的計算包括錨索拉力計算和樁身內力計算，通過錨索拉力計算樁身內力，再通過樁身內力計算結構造價，錨索拉力將影響樁－錨結構造價的計算，因此，錨索拉力計算對樁－錨結構設計尤為重要。通過對樁－錨結構造價與錨索拉力之間的關繫進行分析研究，從樁－錨結構造價與錨索拉力的關繫麯線、多項式擬閤以及優化的變形協調條件3箇方麵建立與樁－錨結構造價相匹配的錨索拉力的計算模型。結閤樁身內力計算的“m”法和“K”法以及結構力學中的虛功原理和圖乘法理論，編寫 Visual C＋＋計算程序，通過不同的滑坡工程實例對不同錨索拉力作用下的樁－錨結構造價進行計算，穫得錨索拉力與樁－錨結構造價的關繫圖。計算結果錶明：樁－錨結構造價是隨著錨索拉力的增大先減小後增加的。關繫麯線模型和多項式擬閤模型計算的與樁－錨結構最低造價相匹配的錨索拉力與優化的變形協調條件計算的錨索拉力十分接近，可選擇其中任意一種計算方法計算得到的錨索拉力作為最終錨索拉力計算值。此時，樁身彎矩的正負極值併不相等，這也錶明樁身正負彎矩的極值相等時的錨索拉力併不一定是最優的錨索拉力，因為此時樁身所處的受力狀態雖然比較理想，但造價可能較高，經濟效益不佳。
장－묘결구적계산포괄묘색랍력계산화장신내력계산，통과묘색랍력계산장신내력，재통과장신내력계산결구조개，묘색랍력장영향장－묘결구조개적계산，인차，묘색랍력계산대장－묘결구설계우위중요。통과대장－묘결구조개여묘색랍력지간적관계진행분석연구，종장－묘결구조개여묘색랍력적관계곡선、다항식의합이급우화적변형협조조건3개방면건립여장－묘결구조개상필배적묘색랍력적계산모형。결합장신내력계산적“m”법화“K”법이급결구역학중적허공원리화도승법이론，편사 Visual C＋＋계산정서，통과불동적활파공정실례대불동묘색랍력작용하적장－묘결구조개진행계산，획득묘색랍력여장－묘결구조개적관계도。계산결과표명：장－묘결구조개시수착묘색랍력적증대선감소후증가적。관계곡선모형화다항식의합모형계산적여장－묘결구최저조개상필배적묘색랍력여우화적변형협조조건계산적묘색랍력십분접근，가선택기중임의일충계산방법계산득도적묘색랍력작위최종묘색랍력계산치。차시，장신만구적정부겁치병불상등，저야표명장신정부만구적겁치상등시적묘색랍력병불일정시최우적묘색랍력，인위차시장신소처적수력상태수연비교이상，단조개가능교고，경제효익불가。
Designing of pile-anti-slide with anchor cable includes anchor cable tensile force and pile internal force. Pile internal force can be obtained by anchor cable tensile force.The cost of pile structure can be obtained by pile internal force.Then anchor cable tensile force affects the cost of pile-anchor cable structure.Therefore,anchor cable tensile force computing is especially important in the design of pile-anchor cable structure.This paper analyzes and studies the relationship between the cost of pile-anchor cable structure and anchor cable tensile force. It establishes anchor cable tensile force matching with the cost of pile-anchor cable structure calculation models from three aspects of relation curve model,polynomial fitting model and optimized deformation consistence condition model.It combines“m”and “K”methods of pile internal force calculation and structural mechanics’principle of virtual work and diagram multiplication method.A calculation programs by Visual C++is complied to calculate the cost of pile-anchor cable structure with different anchor cable tensile force through different case studies.It presents the relation diagrams between the cost of pile-anchor cable structure and anchor cable tensile force.The results show that the cost of pile-anchor cable structure first decreases and then increases with the increase of anchor cable tensile force.Three kinds of model calculation results of anchor cable tensile force matching with the cost of pile-anchor cable structure are very close.Anchor cable tensile force calculated by any method can be considered as the final anchor cable tensile force design value.At this point,the plus and minus extremums of bending moment of pile are not equal.This also shows that anchor cable tensile force is not necessarily the optimal when the plus and minus extremums of bending moment of pile are equal.Although pile body status is ideal at the moment,the cost may be higher,so that economic benefit is poor.
