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动弹模与现在普遍使用的静弹模相比,更符合岩体天然状态的实际情况,具有经济、快速的优点。近十几年国外已广泛采用动弹模作为坝基、坝肩和各种地下结构的计算依据,国内各工程单位也日益予以重视,由於设备缺乏,这方面工作还不够普遍。本文从震动法的原理分析出发,介绍了利用现有国产电子设备,经过一部份自制配套所组装的GL-301组合式震探仪的使用情况,根据对三个工程的岩体测试资料,提出坚硬完整岩体动弹一般要高於静弹的1.5-3倍;风化破碎不宜取样的岩体,动弹显著低于静弹,并认为这正是动弹的优越性之一。
Compared with the commonly used static ammunition model, the dynamic ammunition model is more in line with the actual situation of the natural state of the rock mass, which has the advantages of economy and speediness. Nearly a dozen years abroad, it has been widely used as a basis for calculation of dam foundation, dam abutment and various underground structures. Domestic engineering units are also paying increasing attention. Due to lack of equipment, work in this area is still not yet widespread. Based on the principle analysis of the vibration method, this paper introduces the use of the GL-301 combined seismic detector which is made by using the existing domestic electronic equipment and a part of the homemade equipment. According to the rock mass test data of the three projects, It is suggested that the rock mass with hard and intact rock mass should be 1.5-3 times higher than that of the static bomb. The rock mass which is not suitable for sampling by weathered crushing should be significantly lower than that of the static rock mass, and this is one of the superiority of moving.