Foundation Methods for the Soft Ground Reinforcement of Lightweight Greenhouse on Reclaimed Land: A review

Abstract

The demand for large-scale horticultural complexes utilizing reclaimed lands is increasing, and one of the pending issues for the construction of large-scale facilities is to establish foundation design criteria. In this paper, we tried to review previous studies on the method of reinforcing the foundation of soft ground. Target construction methods are spiral piles, wood piles, crushed stone piles and PF (point foundation) method. In order to evaluate the performance according to the basic construction method, pull-out resistance, bearing capacity, and settlement amount were measured. At the same diameter, pull-out resistance increased with increasing penetration depth. Simplified comparison is difficult due to the difference in reinforcement method, diameter, and penetration depth, but it showed high bearing capacity in the order of crushed stone pile, PF method, and wood pile foundation. In the case of wood piles, the increase in uplift resistance was different depending on the slenderness ratio. Wood, crushed stone pile and PF construction methods, which are foundation reinforcement works with a bearing capacity of 105 kN/m 2 to 826 kN/m 2 , are considered sufficient methods to be applied to the greenhouse foundation. There was a limitation in grasping the consistent trend of each foundation reinforcement method through existing studies. If these data are supplemented through additional empirical tests, it is judged that a basic design guideline that can satisfy the structure and economic efficiency of the greenhouse can be presented.

Long-Term Settlement Prediction of Ground Reinforcement Foundation Using a Deep Cement Mixing Method in Reclaimed Land

“…The high-spec prestressed high-strength concrete (PHC) pile reinforcement method is mainly applied to the ground foundation of large-scale horticultural complexes [4]. In the case of PHC piles, the foundation can be stably reinforced, but expensive construction costs are required.…”

“…In order to reduce the construction cost [5] and provide high construction convenience for construction requiring low bearing capacity [6], various construction methods, such as the soil cement mixing method, timber piles, and helical piles for reinforcing soft ground, have been proposed [7,8]. Since it is difficult to apply the compaction method to a thick buried layer such as a reclaimed land, this paper reviewed the structural safety of the deep cement mixing (DCM) method, which is one of the ground reinforcement methods for the construction of large-scale horticultural facilities [4,9].…”