Soils may react to the impact of wheeling with volume-changed deformation by compaction and volume-constant deformation by shearing. The different deformation mechanisms with their deteriorated effects on soil pore functions have been studied frequently, but less is known about the compaction/shearing-induced deformation on structured soils as compared with homogenized substrates. In order to document both the effect of aggregation on soil deformation behaviors as well as the sensitivity due to texture, compaction and shearing measurements were performed on soil samples from the A- horizon of a homogenized Luvisol (a silt loam with a bulk density of 1.37 g cm^-3) and two structured Gleysols (clay loam soils with bulk densities of 1.34 g cm^-3 and 1.11 g cm^-3). The changes of vertical settlement (Δ$H$), air/water-filled pores ($\epsilon$/$\theta$), air permeability ($k_a$), and pore water pressure ($u_w$) during compaction and subsequent shearing were studied. Results showed that the soil deformation behaviors due to compaction and shearing depended highly on the level of applied normal stress, especially on structured soils. At a normal stress of 50 kPa, which was smaller than the precompression strength, the structured Gleysols had only minor compaction-induced deformation (Δ$H$: 0∼1 mm) and a contractive shear behavior. At a high normal stress of 200 kPa, which exceeded the precompression strength, both homogenized and structured soils displayed greater compaction-induced deformation (Δ$H$: 3.5∼6.0 mm) and a dilative shear behavior. Compared with static loading, cyclic loading resulted in further deformation and dilative shear behaviors in both structured and homogenized soils. In addition, the structured soils showed a smaller decrease in $\epsilon$/$\theta$ and maintained 10 times higher $k_a$ value than homogenized soils. However, shearing reduced the inter-aggregate pore continuity and enhanced the relative functionality of the sheared intra-aggregate pores, as was proofed by the more pronounced changes of $u_w$ (${\mathrm{\Delta }u}_w$) in the structured soils (from -93.0 hPa to +335.6 hPa) compared with that in the homogenized silt loam (from +2.1 hPa to +140.2 hPa). In conclusion, the well-structured clayey soils exhibited less deformation during compaction compared with the homogenized (tilled) soil with coherent structure and more silty texture. The dynamic stress application and shearing resulted in more intense weakening of soil structure because the accessibility of particle surfaces for mobilized water coincides with an enhanced stress dependent swelling and sliding due to the rapidly increased $u_w$.

土壤可能会通过压实引起的体积变化变形和剪切引起的体积恒定变形对车轮的影响做出反应。人们经常研究不同的变形机制及其对土壤孔隙功能的恶化影响，但与均质基质相比，对结构化土壤的压实/剪切引起的变形知之甚少。为了记录聚集对土壤变形行为的影响以及由于质地引起的敏感性，对来自均质 Luvisol（堆积密度为 1.37 g cm ^-3 ) 和两种结构的 Gleysols（粘壤土，体积密度分别为 1.34 g cm ^-3和 1.11 g cm ^-3）。垂直沉降的变化（Δ$H$), 充满空气/水的孔隙 ($\epsilon$/$\theta$）， 透气性 （${克}_{\mathrm{一种}}$) 和孔隙水压力 (${你}_{瓦}$) 在压实和随后的剪切过程中进行了研究。结果表明，由于压实和剪切引起的土壤变形行为高度依赖于施加的正应力水平，尤其是在结构化土壤上。在小于预压强度的 50 kPa 法向应力下，结构化 Gleysols 只有很小的压实变形（Δ$H$: 0∼1 mm) 和收缩剪切行为。在超过预压强度的 200 kPa 高正应力下，均质土和结构土均表现出更大的压实变形（Δ$H$: 3.5∼6.0 mm) 和扩张剪切行为。与静态加载相比，循环加载在结构化和均质化土壤中导致进一步的变形和膨胀剪切行为。此外，结构性土壤的减少幅度较小。$\epsilon$/$\theta$ 并保持高出 10 倍 ${克}_{\mathrm{一种}}$值高于均质土壤。然而，剪切降低了骨料间孔的连续性并增强了剪切后的骨料内孔的相对功能，这可以通过更显着的变化来证明${你}_{瓦}$ (${\mathrm{\Delta }你}_{瓦}$) 在结构化土壤中（从 -93.0 hPa 到 +335.6 hPa）与在均质粉砂壤土中（从 +2.1 hPa 到 +140.2 hPa）相比。总之，与具有连贯结构和更多粉质质地的均质（耕作）土壤相比，结构良好的粘土在压实过程中表现出较小的变形。动态应力的应用和剪切导致土壤结构更强烈的弱化，因为流动水的颗粒表面的可及性与由于快速增加的应力相关的膨胀和滑动相吻合。${你}_{瓦}$.