Foundation combined pile reinforcing method

Abstract

The invention provides a foundation combined pile reinforcing method, and belongs to the technical field of building construction methods. A pre-filling hole with the diameter larger than that of a shaped tube is punched in a designed position; a hole expanding auxiliary tool is inserted into the pre-filling hole; an explosion assembly is put from an opening in the upper end of the shaped tube, and the explosion assembly comprises a plurality of explosive packages which are connected in series so as to form a circle; a lead of the explosive package is ignited from the top of the shaped tube, and an expanding hole is formed in the bottom of the pre-filling hole; the shaped tube is rotated, the position of a radial sheet is adjusted, and then blasting is performed again according to the steps so as to increase the hole diameter of the expanding hole; and a reinforcement cage is placed in the pre-filling hole after the hole diameter of the expanding hole reaches the designed size, concrete is poured, the concrete is vibrated to fill the inner and outer sides of the expanding hole and the reinforcement cage, and ground piles which are used for connecting beam columns of a building foundation are formed after the concrete is dried and solidified. The foundation combined pile reinforcing method has the advantages of high strength, high stability and the like.

Description

technical field [0001] The invention belongs to the technical field of building construction methods, and relates to a foundation pile reinforcement method. Background technique [0002] There are many ways to deal with the foundation of buildings. Among them, concrete pile construction is a common foundation reinforcement method. After undertaking the beam-column structure of the building, it can enhance the bearing capacity and stability of the building. [0003] Cast-in-place piles are formed by opening holes directly at the designed pile positions, then adding reinforcement cages in the holes, and then pouring concrete. In order to further enhance the stability and bearing strength of cast-in-place piles, there is a construction method of blasting piles in the prior art. In the existing construction method of blasting piles, the explosive package is first put into the bottom of the pile hole. Gravel is splashed from the pile hole, and in order to make the impact force o...

AI Technical Summary

Problems solved by technology

In order to further enhance the stability and bearing strength of cast-in-place piles, there is a construction method of blasting piles in the prior art. In the existing construction method of blasting piles, the explosive package is first put into the bottom of the pile hole. Gravel is splashed from the pile hole, and in order to make the impact force of the explosion act on the periphery of the pile hole as much as possible, a certain amount of sand and stone should be put into the pile hole after the explosive package is put in to seal the pile hole. The disadvantages are: 1. After the blasting, the sand and stones will fill the space at the bottom of the pile hole, which affects the effect of "hole reaming", and the size of the reaming holes is affected by the sand and stones and becomes smaller; 2. Secondary blasting cannot be carried out. On the one hand, the second blasting needs to put sand and gravel again, which will further affect the size of the reaming hole; on the other hand, after the first blasting, the rock and soil near the reaming tends to harden, and is also compacted by the impact force of the blasting , the third aspect is that the position where the explosive package is placed again cannot be close to the periphery of the reaming hole, and the impact force on the rock and soil around the reaming hole during the blasting process will be greatly reduced; Some methods cannot ensure that the reaming tends to be uniform, that is to say, the reaming may be affected by the position of the explosive package, the degree of relaxation of various parts of the rock and soil, and the distribution of stones, etc., resulting in "relative pile hole offset" or irregular quarters. Affecting the quality of cast-in-situ piles will also increase the difficulty of pouring concrete and the distribution of concrete after pouring concrete. In some cases, "voids" may be formed between the soil layer and concrete; 4. The pile holes are opened according to the design position , if the single blasting cannot achieve the desired effect, and the secondary blasting is difficult to implement, it may be necessary to replace the position of the pile, which will affect the construction

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