Forced ramming construction method for high slope filling with Xigeda soil

Abstract

The invention discloses a forced ramming construction method, and in particular relates to a forced ramming construction method for filling foundation soil with Xigeda soil in a high slope area. In the method, the Xigeda soil is backfilled to a high slope zone of which the gradient is no less than 1:1.75, and then construction processes of main ramming, repeated ramming and full ramming are adopted; before the main ramming is performed, main ramming points are arranged in an area where the Xigeda soil are backfilled, the main ramming points are arranged in a shape of quincunx in the backfilling area, and the space between adjacent main ramming points is between 4 and 6 meters; the energy level of the main ramming is 6,000Kn.m, the ramming times of each point is between 10 and 14 times, and the average subsidence amount of the last three strikes is less than or equal to 8 centimeters. Through the process, the height of the gradient can reach over 8 meters, the internal friction angle of the high slope is no less than 20 degrees, the cohesive strength is no less than 30 kPa, and the compactedness is no less than 0.94. The forced ramming construction method solves the unresolved problem of the forced ramming construction of the Xigeda soil for the high slope filling at home and abroad.

Description

technical field [0001] The invention relates to a dynamic ramming construction method, in particular to a dynamic ramming construction method in which Xigeda soil is used for filling in high slope areas. Background technique [0002] The dynamic compaction construction method is a foundation construction method used for compacting the backfill foundation. For the foundation treatment of the high fill slope area, technical treatment measures such as reinforcement, stone addition, retaining wall, anti-slide pile, and grouting method are generally adopted at home and abroad. The method has a long construction period and high cost. [0003] Xigeda soil is a kind of silt loam, silt soil or their mixture. The primary minerals in this soil are mainly quartz and feldspar, and the secondary minerals are mainly montmorillonite, illite and kaolinite. friction angle The value is small, the cohesion C value is low, and the stability is poor. It is used as a filling material for dynam...

AI Technical Summary

Problems solved by technology

For the foundation treatment of the high fill slope area, technical treatment measures such as reinforcement, stone addition, retaining wall, anti-slide pile, and grouting method are generally adopted at home and abroad. The method has a long construction period and high cost

[0003] Xigeda soil is a kind of silt loam, silt soil or their mixture. The primary minerals in this soil are mainly quartz and feldspar, and the secondary minerals are mainly montmorillonite, illite and kaolinite. friction angle The value is small, the cohesion C value is low, and the stability is poor. It is used as a filling material for dynamic compaction. There are certain researches in China, but there is no research and application of treatment measures. It should be used as backfill material in high slope areas. At present, technical treatment measures such as reinforcement, stone addition, retaining wall, anti-slide pile, and grouting method are also adopted.

The soil quality in the Panzhihua area is dominated by Xigeda soil, and this area is also a hilly area with high mountains. When treating the foundation, there are often high slopes, so the cost of foundation treatment in these areas is high and the construction period is long.

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