In-situ cement-mixing lattice-shaped ground improvement (lattice wall) is one of the effective countermeasures for liquefiable grounds. However, its high cost hinders its wide applicability. This is mainly due to the conventional concept of seismic designs which do not allow any liquefaction of the ground against earthquakes.

The recent seismic design code was revised to comply with the concept of performance-based design, which allows some displacement or slight damage to structures, such as pile foundations, during major earthquakes. In order to apply lattice walls to meet the concept of the recent design standard, especially against major earthquakes, it is necessary to establish a rational design method that considers the quantitative effect of lattice walls.

In this study, therefore, a series of 1-g field shaking table tests was performed with a lattice wall, and the effect of the wall was carefully evaluated through the quantitative measurement of the stress–strain relationship of the liquefiable ground inside the lattice wall and in the free ground (without a lattice wall). It became possible to quantitatively examine the effect of the wall by installing small accelerometers into the ground with precision.

Two major positive effects of the lattice wall were observed through the series of shaking table tests. One was the delay in the onset of liquefaction by the restriction of shear strain, and the other was the recovery of the shear stiffness of the ground even after the onset of liquefaction. These experimental results indicate that lattice walls can be applied as an effective liquefaction countermeasure method, especially when the performance-based design is applied to address large earthquakes.

现浇水泥搅拌格子状地基改良（格子墙）是液化地基的有效对策之一。但其高昂的成本限制了其广泛的应用。这主要是由于传统的抗震设计概念不允许地面在地震作用下发生液化。

最近的抗震设计规范进行了修订，以符合基于性能的设计理念，允许在大地震期间对桩基等结构产生一定的位移或轻微损坏。为了应用格构墙满足最新设计标准的理念，特别是抗大地震，有必要建立一种考虑格构墙定量效应的合理设计方法。

因此，本研究采用格构墙进行了一系列1 g现场振动台试验，通过定量测量格构墙内部可液化地面的应力-应变关系，仔细评估了墙体的效果和自由地面（没有格子墙）。通过在地面上精确安装小型加速度计，可以定量检查墙壁的影响。

通过一系列振动台测试观察到格子墙的两个主要积极作用。一是由于剪切应变的限制而延迟了液化的开始，二是即使在液化开始后地面的剪切刚度也恢复了。这些实验结果表明，格子墙可以作为一种有效的液化对策方法，特别是当基于性能的设计应用于应对大地震时。