This paper reviews the relationship between discontinuity geometry and load-settlement characteristics, for the particular case of weak rock intersected by horizontal and vertical joints. Data from large loading tests and full-scale foundation structures are reviewed, and the mechanisms controlling mass compressibility are postulated.

  • INTRODUCTION

  • THE COMPRESSIBILITY OF FRACTURED ROCK

  • THE OBSERVED COMPRESSIBILITY OF CHALK

  • DISCUSSION

  • CONCLUSIONS

  • REFERENCES

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