DZ_T0132-1994钻孔压水试验规程.pdf

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1、uz中华人民共和国地质矿产行业标准Dz/T0132一94钻孔压水试验规程1994一10一31发布1995一07一01实施中华人民共和国地质矿产部发布目次砚、1主题内容与适用范围·········”·········“·········，·”························..·..·..·..·..·.⋯⋯(1J、2试验方法·“····························⋯⋯”··········”····································⋯⋯

2、(1少、.3试段长度······························“·“············”··········································⋯⋯(1产、，4试验压力···································”······”···································⋯⋯(1产、.5试验阶段···”·”·····⋯⋯二”······································

3、·“······················⋯⋯.(12、.6试验钻孔与试验用水··························································”······..·..·.⋯⋯(1矛、少7试验设备与仪表，····················································································⋯⋯(2、、8洗孔·······················⋯⋯，’···

4、··························································⋯⋯(2了、.9试段隔离”···········································，’··············⋯⋯二~”········⋯⋯(2尹、.10水位观测·‘二’··⋯’二’二‘.................................................................I............“(2产、n压

5、力与流量观测······⋯⋯.!’····.··.·······.·..····‘·····················一t’···.···⋯⋯(2，、卫12资料整理···········································································⋯⋯(2产、，附录A条文解释(参考件)..........................................................................

6、........(5夕中华人民共和国地质矿行业标准Dz/T0132-94钻孔压水试验规程主题内容与适用范围1.1本规程规定了为测定岩体的透水性而进行的钻孔压水试验基本方法。1.2本规程适用于工程勘察中的钻孔压水试验工作试验方法2.1本规程采用吕荣试验法作为基本的钻孔压水试验方法。2.2钻孔压水试验一般随钻孔的加深自上而下地分段进行。3试段长度3.JI试段长度一般为5m.3，L断层破碎带，岩溶洞穴等特殊孔段，应根据具体情况确定试段长度。3.C魂J相邻试段应互相衔接。4试验压力41压水试验采用三级压力(h

7、,p,p0，一般分别为。.3MPa,0.6MPa和1.OMPae42当试段埋深小于30m或岩体软弱破碎时，应适当降低试验压力。43试验压力按公式(1)计算P=pr十pz一PS*******"",··，.··········。···，.，，，·一(1)式中:P试验压力，MPa;pp—压力表指示压力，MPa;Pz—压力表中心至压力计算零线的水柱压力，MPa;Ps—管路压力损失，MPa,4.4压力计算零线的确定方法4.4.1当地下水位在试段以下时，压力计算零线为通过试段中点的水平线。4.4.2当地下水位在试

8、段以上时，压力计算零线为地下水位线。4.4-3当地下水位在试段以内时，压力计算零线为通过地下水位以上试段中点的水平线。4.5管路压力损失宜根据实测资料确定。试验阶段5.1压水试验一般分为五个阶段，其试验压力分别为P3,p-P3,Pz,PIe5.2当试段的透水率(e)小于1Lu时，可不进行降压阶段的试验试验钻孔与试验用水5.1压水试验钻孔的孔径一般为59-150mmo中华人民共和国地质矿产部1994一10一31批准1995一07一01实施IDz/T0132