【摘要】：動力離心試驗的先進性和有效性已在國內(nèi)外巖土地震工程界形成廣泛共識,但其優(yōu)越性的充分發(fā)揮需要可靠量測技術(shù)作為基礎(chǔ)�？偨Y(jié)了動力離心試驗點位式量測技術(shù)常發(fā)生的故障形式,探討了孔隙水壓、加速度和位移3種常規(guī)點位式傳感器設(shè)計和量測改進方法,用以提高試驗數(shù)據(jù)可靠性,采用分體式結(jié)構(gòu)孔隙水壓力計增強了故障應(yīng)急能力和試驗可控性,用真空去離子飽和法提高透水石飽和速率和質(zhì)量,加速度計采用分體式結(jié)構(gòu),提高了試驗操作性和核心元件利用率,采用橡膠密封技術(shù)減小了動荷載中沉降和傾斜發(fā)生率。提出加速度計和位移計聯(lián)合測試與布設(shè)方法,可以獲取更為準(zhǔn)確的土體內(nèi)側(cè)向位移變化過程,具有較好靈活性。
[Abstract]:The advanced and effective dynamic centrifugal test has reached a wide consensus in the field of geotechnical seismic engineering at home and abroad, but the full play of its advantages needs reliable measurement technology as the basis. This paper summarizes the common fault forms of dynamic centrifugal test point position measurement technology, and probes into three conventional point position sensors design and measurement improvement methods of pore water pressure, acceleration and displacement, which are used to improve the reliability of test data. The fault emergency ability and test controllability are enhanced by using split structure pore water pressure gauge, and the saturation rate and quality of permeable stone are improved by vacuum deionization saturation method. The accelerometer adopts split structure, which improves the operation of the test and the utilization ratio of the core components, and the rubber sealing technology is used to reduce the incidence of settlement and tilt in the dynamic load. The joint test and arrangement method of accelerometer and displacement meter is put forward, which can obtain more accurate inner displacement change process of soil and has good flexibility.
【作者單位】： 中國地震局工程力學(xué)研究所地震工程與工程振動重點實驗室;加州大學(xué)戴維斯分校土工模擬中心;
【基金】：中央級公益性研究所基本科研業(yè)務(wù)費專項(No.2014B09) 國家自然科學(xué)基金(No.41272357)
【分類號】：TU41

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