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1、目录绪言一、集体实习概况1.回弹实验回弹实验是一种简单、轻便的实验。otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheN
2、orthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,MinistersandotherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiC
3、ommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCounty
4、partyCommitteeSecretary,MinistersandotherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeenth
5、eNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand2.点荷载试验实验对象是脆性材料，实验目的是测量抗拉、抗压强度。1.实验原理：点荷载试验对点荷载作用下使其破坏，破坏性质张（拉）裂。2.优点：①接触面积小，实验仪器小型轻便，便于携带。②可利用不规则形状，降低成本，节约时
6、间。③填补了常规实验无法进行的低强度和严重风化岩石的强度测量实验的空白。3.缺点：①基本原理及计算方法有待研究。②测得的数据较分散，其值一般较高，但可提高试验数量提高精度。4.公式：点荷载强度PLS=P/(Af)5.仪器设备：①加荷系统：加荷框架（底座、立柱）、油泵、千斤顶、加荷锥。②测量系统：油泵表。6.试样：试样每组至少15块，尺寸4～8见方。7.试样步骤：①测量试样尺寸②放入试验机③匀速加荷，使试样在10～60s内破坏，并记录油压表读数，如破坏面仅经过一个荷载点，则实验无效。8.资料整理：从试样中去掉两个最大值，两个最小值，按公式计算算术平均值，计算抗拉、抗压强度。抗拉：σt
7、=1.92PLS抗压：σl=17.86PLSotherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommit
