| Summary: | Grouted anchors have become a common technique in the application of earth retention systems, slope stability problems and tie-down structures in unfrozen soils due to its cost and time efficiency. However, within much of Alaska area, permafrost is a common type of soil and might contain large amount of visible ice. The highly time and temperature dependent properties of ice-rich soil make it a challenge for the application of anchors in permafrost area. This project valuates the effect of water content and temperature on the creep behavior of shallow anchors in cold room lab. Also, field test was conducted to determine effectiveness of three types of grouting materials, including Bentonite clay, Microsil Anchor Grout and special cement formula. The temperature along the anchor was monitored to evaluate the degradation of the surrounding frozen soil. Research results may be applicable in the design of shallow anchors in ice-rich permafrost at various ice content and temperature range. Also, the load distribution and the pullout test results could give a general guidance for the shallow anchor design in permafrost area. Table of Contents - iv List of Figures - viii List of Tables - xiv Chapter 1 Introduction - 1 1.1 General - 1 1.2 Problem Statement - 1 1.3 Objective - 2 1.4 Research Methodology - 2 Chapter 2 Literature Review - 4 2.1 Background on Grouted Anchors - 4 2.2 Creep Theory - 5 1. General Creep Behavior - 5 2. Creep Behavior of Ice - 6 3. Creep behavior of Frozen Soils - 8 2.3 Grouted Anchor Design in Permafrost - 10 1. Grouted Anchor Design Considerations - 11 2. Grouted Anchor Design in Ice-rich Soil - 14 Chapter 3 Laboratory Test - 19 3.1 Laboratory Pullout Test Preparation - 19 1. Soil Preparation - 19 2. Grouted Anchor Preparation - 20 3. Load Frame Preparation - 23 4. Calibration of the Testing Equipment - 26 3.2 Laboratory Pullout Test Procedures - 28 1. Preparing Anchor Test Specimens - 28 2. Load Frame Setup - 31 3. Testing Procedure Outline - 32 Chapter 4 Field Tests of Anchor in CRREL ...
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