1. Site Investigation 2. Soil Classification 3. Rock Classification 4. Field Sampling and Testing 5. Soil Strength Parameters from Testing 6. Rock Strength Parameters from Testing 7. Soil Properties and the state of the Soil 8. Permeability and its influence 9. Rock Properties 10. Material and Testing Variability 11. Deformation Parameters 12. Earthworks 13. Subgrades and Pavements 14. Slopes 15. Terrain Assessment, Drainage and Erosion 16. Geosynthetics 17. File Specifications 18. Rock Mass Classification Systems 19. Earth Pressures 20. Retaining Walls 21. Soil Foundations 22. Rock Foundations 23. Movements 24. Appendix - Loading 25. References

background

Foundations and earth structures

Handbook of geotechnical investigation and design tables

Several methods are available for predicting the ultimate lateral resistance to piles in cohesionless soils. However, these methods often produce significantly different ultimate resistance values. This makes it difficult for practicing engineers to effectively select the appropriate method when designing laterally loaded piles in cohesionless soils. By analyzing the lateral soil resistance distribution along the width of the pile and based on the test results of model rigid piles in cohesionless soils collected from the published literature, a simple method is proposed for calculating the ultimate lateral resistance (including frontal soil resistance and side shear resistance) to piles in cohesionless soils. The calculated ultimate lateral resistance from the proposed method agrees well with that obtained from centrifugal tests of flexible model piles. Predicting the lateral load capacity of laboratory and field rigid test piles in cohesionless soils using the proposed method also yields satisfactory results.

Ultimate Lateral Resistance to Piles in Cohesionless Soils

: Lessons Learned/New Directions was prepared by the ITRC Permeable Reactive Barriers Team to update previous guidance written by the team. The goal for this document was to compile the information and data on permeable reactive barriers (PRBs) that have been generated over the last 10 years of technology development and research, as well as to provide information on noniron-based reactive media that can be used in PRBs. This document also provides an update on a developing technology somewhat related to PRBs in which source zone contamination is treated with iron-based reactive media. A PRB is defined as an in situ permeable treatment zone designed to intercept and remediate a contaminant plume. Zero-valent iron is the most common media used in PRBs to treat a variety of chlorinated organics, metals, and radionuclides. Reactive media such as carbon sources (compost), limestone, granular activated carbon, zeolites, and others had also been deployed in recent years to treat metals and some organic compounds. The proper design of a PRB is highly dependent on a complete and accurate site characterization. A conceptual site framework is discussed as a means to perform a detailed characterization for PRB deployment. Collection of hydrogeologic, geochemical, microbial, and geotechnical data along with the complete vertical and horizontal plume delineation are necessary to characterize a PRB site. The Triad concept is also introduced as a means to gather site data. The design of a PRB can be enhanced using probabilistic modeling to incorporate the variability of the input design parameters. Construction advancements include the use of biopolymer for trench stabilization or the use of vertical hydraulic fracturing for reactive media emplacement.

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Permeable Reactive Barriers: Lessons Learned/New Directions

Pile groups are frequently designed with equal or similar pile lengths. However, the significant interaction effects among equal-length piles imply that this may not be the optimized configuration. This paper presents the optimization analyses of piled rafts and freestanding pile groups, where pile lengths are varied across the group to optimize the overall foundation performance. The results of the analyses are applicable in cases where the piles derive a majority of the capacity from the frictional resistance. It is demonstrated that, with the same amount of total pile material, an optimized pile length configuration can both increase the overall stiffness of the foundation and reduce the differential settlements that may cause distortion and cracking of the superstructure. The benefits of the optimization can be translated to economic and environmental savings as less material is required to attain the required level of foundation performances. The reliability of the optimization benefits in relation to construction-induced variability is also discussed.

Theoretical Study on Pile Length Optimization of Pile Groups and Piled Rafts

A case study of damages of the Kandla Port and Customs Office tower supported on a mat–pile foundation in liquefied soils under the 2001 Bhuj earthquake

Foundations and earth structures

Citations

Handbook of geotechnical investigation and design tables

Ultimate Lateral Resistance to Piles in Cohesionless Soils

Permeable Reactive Barriers: Lessons Learned/New Directions

Theoretical Study on Pile Length Optimization of Pile Groups and Piled Rafts

A case study of damages of the Kandla Port and Customs Office tower supported on a mat–pile foundation in liquefied soils under the 2001 Bhuj earthquake

Related Papers (5)

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Analysis of Laterally Loaded Piles in Sand

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Pile Foundation Analysis and Design

Theoretical Soil Mechanics