Mechanical hole forming technology applied to karst landform

Abstract

The invention relates to a mechanical hole forming technology applied to karst landform. The technology comprises the following steps of: laying off and positioning; digging a mud pit; burying a pile casing; arranging a drill in place and making mud; forming holes by using an impact machine, wherein when a karst cave is greater than or equal to 3m in depth during construction, a steel pile casing dado is arranged; pumping out sediment and supplementing mud; checking the sediment; clearing off the holes by using a home-made hole cleaning device; checking the holes; arranging a steel reinforcement cage; arranging guide pipes; and pouring underwater concrete. By the mechanical hole forming technology, the probability of occurrence of hole collapse, overfilling of concrete and the like can be lowered, karst cave areas can be effectively protected, the effect of saving concrete is achieved and the cost is further reduced; moreover, by the mechanical hole forming technology, a unit in charge of construction can be effectively helped to clear off sediment from the bottoms of holes, hole piles in collapsed holes can be cleared quickly, the specific depth of a hole pipe can be measured by construction workers.

Description

technical field [0001] The invention relates to a mechanical pore-forming method under special geological conditions, in particular to a mechanical pore-forming method applied to karst landforms with complex geology and many karst caves. Background technique [0002] Now for the treatment of karst landforms, most of our country adopts mud retaining wall method for construction. However, for areas with many karst caves and areas with particularly complex geological conditions, the use of mud retaining walls still cannot play a good supporting role, and phenomena such as hole collapse and concrete overfilling will occur; moreover, in the actual mechanical hole forming process , if there are many times of hole collapse, and the sand and silt are caused after the hole collapse, the specific hole depth cannot be measured. In the prior art, the sand and the like cannot be completely cleaned out by traditional mud flushing, and the specific hole depth cannot be measured. Hole pile...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the existing mechanical pore-forming technology under karst landform, and provide a new mechanical pore-forming method under karst landform. In areas with particularly complex geological conditions, it can improve the defects that the mud retaining method cannot play a good supporting role, reduce the probability of hole collapse, concrete overfilling and other phenomena; and effectively help the construction unit solve the cleaning of the bottom of the hole and speed up The hole cleaning speed of collapsed hole piles, and allows the construction personnel to measure the specific depth of hole piles

Images