Karst cave treating method suitable for pile foundation construction in karst area
A treatment method and technology for karst caves, which are applied in the fields of foundation structure engineering, sheet pile wall, soil protection, etc., can solve the problems of complex construction process and high cost, and achieve the effects of stable construction quality, strong operability and short construction period.
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[0031] refer to Figure 1 to Figure 4 , this embodiment provides a cave treatment method suitable for pile foundation construction in karst areas.
[0032] The karst cave treatment method suitable for pile foundation construction in karst areas includes the following steps:
[0033] The first step is to drill ahead of the pile position to find out the distribution of karst caves 5 at the pile position;
[0034] In the second step, after the drill hole 1 is drilled to the roof of the karst cave 5, the pile hammer 2 is used to repeatedly drill up and down to break through the roof of the karst cave 5. Once the mud level drops, the water level in the drill hole 1 changes greatly, and the mud consistency occurs. When the drilling speed changes or the drilling speed is significantly accelerated without deviation, it indicates that the pile hammer 2 has passed through the top of the cave 5 and entered the cave;
[0035] The third step is to lift the pile hammer 2;
[0036] The fo...
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