CAJ | 학술논문

针对普通真空预压法的真空度传递不足、孔隙水压力消散过慢，淤堵现象严重，工期漫长和深层土体加固效果欠佳等缺点，在以前的真空预压法的基础上，进行了新型分阶段真空预压试验研究，并和普通真空预压法模型试验的累积沉降量、真空度、孔隙水压力、抗剪强度、含水率和出水量等指标进行对比分析，试验结果表明：上层土体的各项参数大致相等，但其下层土体的各项指标明显优于后者。说明分阶段真空预压法能够较好地将真空度传递到深层土体、加快孔隙水压力消散、缓解淤堵现象、缩短工期，并取得良好加固效果。
침대보통진공예압법적진공도전체불족、공극수압력소산과만，어도현상엄중，공기만장화심층토체가고효과흠가등결점，재이전적진공예압법적기출상，진행료신형분계단진공예압시험연구，병화보통진공예압법모형시험적루적침강량、진공도、공극수압력、항전강도、함수솔화출수량등지표진행대비분석，시험결과표명：상층토체적각항삼수대치상등，단기하층토체적각항지표명현우우후자。설명분계단진공예압법능구교호지장진공도전체도심층토체、가쾌공극수압력소산、완해어도현상、축단공기，병취득량호가고효과。
In view of the defects of general vacuum preloading method such as vacuum degree delivery deficit, slow pore water pressure dissipation, serious siltation, long construction period and poor deep soil consolidation effect and so on, and on the basis of the previous vacuum preloading method, the new grading vacuum preloading experiment is studied. The cumulative settlement, vacuum degree, pore water pressure, shear strength, moisture content and water yield of the new method are compared with those of the general vacuum preloading model experiment. The experimental results show that: the upper soil parameters are roughly equal, but the lower soil indicators are superior to the latter. It indicates that the grading vacuum preloading method can well transfer vacuum to deep soil, accelerate the pore water pressure dissipation, mitigate siltation phenomenon, shorten time limit for a project, and achieve good reinforcement effect.