Cast-in-place pile hole cleaning slag filtering device and method

Abstract

The invention relates to a cast-in-place pile hole cleaning slag filtering device and method. Based on direct circulation hole cleaning, drilling slag in slurry is filtered through a screen, thus, a settling method is replaced, the slag is discharged, the screen is obliquely arranged, and the filtered slag is automatically discharged through thrust of the slurry. According to the cast-in-place pile hole cleaning slag filtering device and method, the slag filtering effect is good, the hole cleaning time can be remarkably shortened, and the slurry obtained after hole cleaning is completed can berecycled conveniently; and the oblique screen is arranged and replaces a settling pond, the settling pond construction cost can be reduced, and meanwhile, the slurry preparation amount is decreased.

Description

technical field [0001] The invention relates to the field of urban infrastructure construction, in particular to a hole cleaning device and method for hole-filtering cast-in-place piles with mud retaining walls. Background technique [0002] In the urban infrastructure construction, the hole-forming process of mud retaining wall is often used in the construction. After the mud retaining wall is formed into holes, the hole cleaning and slag removal of the retaining wall mud should be carried out before pouring concrete, so that the density and sand content of the retaining wall mud can reach the level of pouring concrete. Require. [0003] At present, the construction methods of hole clearing and slag removal are usually positive circulation method and reverse circulation method. The positive circulation method is to use the mud prepared in advance and meet the requirements, and use the mud pump to send it into the bottom of the pile hole, and rely on the pressure of the mud ...

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Problems solved by technology

[0003] At present, the construction methods of hole clearing and slag discharge are usually positive circulation method and reverse circulation method. The positive circulation method is to use the mud prepared in advance and meet the requirements, and use the mud pump to send it into the bottom of the pile hole, and rely on the pressure of the mud pump to remove the original retaining wall. The mud is pressed out of the pile hole, and at the same time, the drilling slag is carried out, and flows into the sedimentation tank. The upper end of the sedimentation tank is connected with the upper end of the mud tank. Because the mud has high viscosity, high density, and a lot of sediment, only sedimentation is used to remove the drilling slag in the mud. The effect is very limited, and even some drilling slag is brought to the mud pool by the flowing mud before it can settle, so it takes a long time to clean the hole and discharge the slag, and after the hole cleaning is completed, the remaining mud contains more drilling slag, which is difficult to reuse , usually dehydrated and transported out; the reverse circulation method is that the mud pump directly pumps out the original mud from the bottom of the pile hole, and the prepared mud flows freely into the pile hole. The reverse circulation method also uses a sedimentation tank and relies on sedimentation To get rid of the drilling slag in the mud, there are also the above-mentioned technical problems

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