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I摘要本设计为兖矿鲁化分馏塔的基坑支护设计。本设计是根据国家现行建筑基坑支护技术规程，在给定地质勘察报告的条件下，进行基坑支护设计，主要目的是掌握基坑支护的设计方法。本设计采用了钻孔灌注桩加锚杆的基坑支护结构。在土压力计算过程中，运用了朗肯土压力理论；在内力计算过程中，运用了等值梁法；在配筋计算过程中，参照了混泥土结构设计规范；在降水处理设计时参照了建筑基坑支护技术规程；计算过程中除了以国家现行建筑基坑工程技术规程为依据外，还大量的把实际经验运用其中，加强理论与实践的结合。此次设计的主要指导原则是如何保证基坑的安全可靠、方便施工，并达到经济的效果。通过这篇论文，直观的说明了基坑支护设计所需的各种参数。关键词：基坑支护；钻孔灌注桩；锚杆；降水处理IIAbstractThisdesignistheY.K.Luhuafractionatorfoundationpitsupportingdesign.Thedesignisbasedontheexistingnationalbuildingtechnicalreguationsexcarationgeologicalsurveyinthegivenconditionsofthereportdesignfoundationpit.Themainpurposeofthedesignistograspthedesignmethodsoffoundationpit.Thedesignhasusedthefoundationpitmethodsofboredcaissonpilewithpile-anchor.Duringthecalculatingofsoilpressure,putthesoilpressuretheoriesofW.J.M.Rankinetouse;Inthecourseofcalculatingininternalforce,makeuseoftheequivalentbeammethod;whenmatchingthesteeltocalculate,havecomplywiththecementstructuredesignspecificationnorm;Inthedesignofdraining,makeuseofthetechnicalspecificationforretaining.Andstrengthenedthecombinationoftheactualexperiencewiththetheories.Theguidelineofthisdesignishowtoguaranteethefoundationpitsafe,reliable,convenienttoconstruct,andwhetherreachtheeconomicresultornot.Throughthispapers,wecanseevariouskindsofparametersthatareneededinthefoundationpitdesign.Engineersandtechnicianscanconsultthedesignmethodofthistextwhilecarryingonthefoundationpitdesign.Keywords：foundationpit;boredcaissonpile;pile-anchor;drainingxx大学本科毕业设计（论文）目录I目录第一章前言················································································11.1场地工程地质条件··································································22.2本论文主要设计内容·······························································2第二章工程地质与水文地质概况····················································32.1场区工程地质条件··································································32.2水文地质条件········································································52.3基坑周边环境情况··································································5第三章基坑支护方案设计·····························································63.1设计优选··············································································63.1.1设计依据·····················································································63.1.2基坑支护方案优选········································································63.1.3支护方案设计分析········································································83.2支护方案的设计原则及计算参数的确定·····································83.2.1设计原则·····················································································83.2.2参数的初选··················································································9第四章基坑支护设计计算···························································104.1基坑支护设计的主要内容·······················································104.2设计计算············································································104.2.1水平荷载的计算···········································································114.2.2各层土的水平荷载计算································································124.2.3水平抗力计算·············································································164.2.4各层土水平抗力计算···································································174.2.5支点力计算················································································19xx大学本科毕业设计（论文）目录II4.2.6嵌固深度验算·············································································214.2.7灌注桩结构设计··········································································234.2.8桩身最大弯矩的计算···································································234.2.9桩身的配筋计算··········································································244.3锚杆计算············································································274.3.1锚杆设计主要内容······································································274.3.2锚杆设计···················································································274.3.3锚杆设计计算·············································································274.4稳定性验算·········································································314.4.1基坑稳定性验算··········································································314.4.2锚杆整体稳定性验算···································································354.4.3基坑底地基承载力验算································································364.4.4抗倾覆稳定性验算······································································38第五章截水、排水措施································································40第六章施工组织与监测······························································446.1支护结构的施工···································································446.1.1施工要求···················································································446.1.2支护桩施工················································································446.1.3锚杆施工···················································································456.1.4土方开挖········