A method of strengthening the foundation with piles

Abstract

The invention provides a foundation pile reinforcement method, which belongs to the technical field of building construction methods. Drill a pre-filling hole with a diameter larger than that of the molded pipe at the design position; insert the reaming auxiliary tool in the pre-filled hole; put the explosive component from the upper opening of the molded tube, and the explosive component includes a number of explosive packs connected in series; Ignite the lead wire of the explosive package at the top of the shaped tube to form an enlarged diameter hole at the bottom of the prefilled hole; rotate the shaped tube, adjust the position of the spoke, and blast again according to the above steps to increase the diameter of the enlarged hole; After the diameter of the hole reaches the design size, place a reinforcement cage in the pre-filled hole, pour concrete, and vibrate the concrete to fill the diameter-expanding hole and the inside and outside of the reinforcement cage. ground piles. The invention has the advantages of high strength, high stability and the like.

Description

A method of strengthening the foundation with piles technical field The invention belongs to the technical field of building construction methods, and relates to a kind of foundation pile reinforcement method. Background technique The treatment method of building foundation has a lot of, wherein, concrete piling is a common foundation reinforcement method, undertakes construction. The beam-column structure of the building can enhance the bearing capacity and stability of the building. [0003] The cast-in-place pile is directly formed by opening a hole in the designed pile position, then adding a reinforcement cage in the hole, and then pouring concrete. for In order to further enhance the stability and bearing strength of the cast-in-place pile, there is a construction method of blasting the cast-in-place pile in the prior art. In the blasting pile-filling construction method, the explosive pack is first put into the bottom of the pile hole, in order to avoid the gra...

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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