CAJ | 학술논문

结合粒子图像测速（PIV）和近景摄影技术，建立了一种利用人工合成透明土的岩土物理模拟试验方法，非侵入观测和记录了浅基础沉降（SFS）引起的土体变形，并与利用天然土的传统模型试验进行了对比研究。透明土是由与熔融石英的折射率相匹配的孔隙溶液组成。采用激光面照射透明土模型并拍摄下 SFS 引起变形的数字图像，利用基于 MATLAB 的Geo-PIV软件获得了所产生的位移场。试验结果对比分析显示：与天然砂土中的相比，在透明土中SFS引起的扰动区域较大，最大剪应变扩大了约1.5倍，表层隆起范围约增加了30～50%；然而透明土中土体单元的运动趋势总体上与天然砂土中的相似，表明所建立的试验方法在机制研究上具有一定程度的适用性。
결합입자도상측속（PIV）화근경섭영기술，건립료일충이용인공합성투명토적암토물리모의시험방법，비침입관측화기록료천기출침강（SFS）인기적토체변형，병여이용천연토적전통모형시험진행료대비연구。투명토시유여용융석영적절사솔상필배적공극용액조성。채용격광면조사투명토모형병박섭하 SFS 인기변형적수자도상，이용기우 MATLAB 적Geo-PIV연건획득료소산생적위이장。시험결과대비분석현시：여천연사토중적상비，재투명토중SFS인기적우동구역교대，최대전응변확대료약1.5배，표층륭기범위약증가료30～50%；연이투명토중토체단원적운동추세총체상여천연사토중적상사，표명소건립적시험방법재궤제연구상구유일정정도적괄용성。
By combining the technologies of particle image velocimetry (PIV) and close-range photogrammetry, a procedure for geotechnical physical modelling using artificial synthetic transparent soil is developed. The soil deformation caused by the shallow foundation settlement (SFS) are measured and recorded non-intrusively. The conventional model test using natural soils is employed for the purpose of comparison. The transparent soil is made of a pore solution, the refractive index of which is matched with the refractive index of fused quartz. Transparent soil model is sliced by using a laser light sheet and digital images of soil deformations caused by SFS are captured. The MATLAB-based software, Geo-PIV, is employed to obtain the generated displacement fields. The results show that the SFS-induced disturbance zone is enlarged in transparent soil, the maximum shear strain expands by about 1.5 times, and the range of surface heaving increases by 30-50% in transparent soil compared with those in natural soil;however, the movement trends of soil elements in transparent soils are generally similar to those in natural soils, indicating that the proposed modelling methodology has applicability to mechanism study to some extent.