Jason Wu

Chung Hua University · Department of Civil Engineering

Remediation of a complete destroyed slope is often difficult because of various geotechnical challenges and different constraints at the site. Many solutions have been developed; however, not all stabilization methods are appropriate for every type of slope failure. In addition to the technical considerations, aesthetic concerns and sustainability...

Compacted soil-cement has been used worldwide for subgrade stabilization. A case study is presented herein to show the beneficial of using this technique to restore a slope failure in a conjected residential area. Such approach is not common, however, the experience described herein has shown that the compacted soil-cement toe berm together with so...

Infrastructure sustainability has become a major global concern. Massive reservoir siltations (RS) have seriously disrupted the service of many reservoirs worldwide. The dredged siltations are difficult to stockpile, or dispose of, because of their high water content and soft nature. This study explores a novel approach using RS to produce controll...

Reservoir sediments (RS) are difficult to dispose of because of their high water content and soft nature. This study proposed a novel approach using RS as an ingredient in controlled low strength materials (CLSM) and then reinforced it with geobag to facilitate the storage and for backfill applications. Test results have shown that initially geotex...

The safety of the earth structures is highly dependent upon the fill compaction quality. Recently developed nondestructive testing techniques (NDT) present many advantages in comparison with conventional field density measurements. Therefore, use of NDT in monitoring of the fill quality appears to be attractive for future pavement geotechnics appli...

Failure studies are important for engineering practices. Lessons learned from failures provide valuable information to help ensure future success. This paper explores the causes of failure in mechanically stabilized earth (MSE) structures reinforced with geosynthetics. Nineteen cases of MSE failure are carefully examined and quantitatively studied....

Reservoirs in Taiwan have been experiencing severe siltation problems due to unfavorable environmental conditions and numerous harmful human factors. This research conducts a bench scale experimental study to explore the potential of using reservoir siltation (RS) in controlled low strength material (CLSM) particularly for subgrade applications. Te...

In this research, laboratory pullout tests were conducted on grouted soil nails to study the effect of wetting on the interface shear resistance between nail and soil during pullout. Deformed bars with equal size to the true soil nails were used as model nails. The soil used was silty fine sand collected at the site and prepared to a very dense con...

The disposal of on-site construction imperfect earth materials and the production of standard engineering aggregates for backfill have been facing increasingly environmental and ecological challenges in many densely populated metropolitan areas. This paper presents an experimental study using soft excavated surplus clay to produce a clay-based cont...

Over the past decade, most of the reservoirs in Taiwan have been experiencing serious siltation problems. Therefore, the removal of reservoir siltation (RS) and the resource recovery of dredged material have become critical issues for national security and economical development. Controlled low strength material (CLSM) mixed with non-standard recyc...

This study conducted laboratory and field pullout tests on grouted soil nails in sand to examine the interface shear resistance between nails and soil during pullout. The results indicated that the pullout strength found in the laboratory correlated reasonably well with that observed in the field. Such a finding makes the predication of field pullo...

As the uses of geosynthetic reinforced structures continue to increase, the possibility of their failure also continues to grow. In recent years, more failures of geosynthetic reinforced slopes initiated by intense rainfall have been reported. These incidents were likely the effect of water being absorbed by the unsaturated fill and thereby reducin...

The development of beneficial uses of recycled scrap tires is always in great demand around the world. The disposal of on-site surplus excavated soil and the production of standard engineering aggregates have also been facing increasing environmental and ecological challenges in congested islands, such as Taiwan. This paper presents an experimental...

Scrap tire disposal is a major environmental challenge around the world. This paper proposes a novel alternative using recycled crumb rubber as a controlled low strength material (CLSM) for bridge approach backfill. Laboratory tests performed to assess the engineering properties of CLSM consisted of recycled rubber fines and various ratios of nativ...

Failures of geosynthetic reinforced soil slope (RSS) initiated by intense rainfall have been often reported recently. These incidents were likely to be the effect of strength reduction upon wetting for unsaturated fill. This paper proposes a practical approach to evaluate the probable erroneous in analysis that responsible for such failures. A case...

This research investigated the performance of a soil-based flowable fill as an alternative backfill for pipeline construction. The excavated natural silty sand from a trench was used as the major ingredient in the flowable fill. The study consisted of two phases. In phase I, laboratory experiments were conducted to develop optimum mix formula. Test...

Compaction grouting has become a popular method for site improvement around the world. However, in saturated soft clays, the treatment often induces higher excess pore water pressure and limits the efficiency of the improvement. To take advantage of the prefabricated vertical drain (PVD) and compaction grouting, a radial ground improvement technolo...

Compaction grouting has become a popular method for site improvement around the world. However, in saturated soft clays, the treatment often induces higher excess pore water pressure and limits the efficiency of the improvement. To take advantage of the prefabricated vertical drain (PVD) and compaction grouting, a radial ground improvement technolo...