A pile-forming method based on recycled aggregate piles from construction waste

Abstract

The invention discloses a method for forming piles based on recycled aggregate piles from construction waste. The construction waste is used as the aggregate to make piles, and the construction waste is pretreated before the piles are formed. Then measure the pile position and bury the casing; use an auger to form a hole; pour a concrete cushion at the bottom of the hole; place a steel cage in the drilled hole; fill the casing with construction waste in layers and compact it with a column hammer to form a compact layer; pour concrete into the reinforcement cage, vibrate and compact it, then lift the casing to a certain height, fill in construction waste, and compact it with a column hammer, and repeat this until the thickness of the filler reaches the design level, pull out the casing, and put out Casings, forming piles based on recycled aggregate from construction waste. This kind of pile can take into account the advantages of resource recycling, energy saving and consumption reduction, environmental protection, good shear and compression resistance, small deformation, stable structure, good balance, high bearing capacity of single pile, and durability.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a method for forming piles based on recycled aggregate piles from construction waste. Background technique [0002] With the development of my country's urbanization process, the discharge of construction waste is increasing year by year, and the proportion of renewable components is also increasing. However, most construction waste is transported to the outskirts or surrounding cities for simple landfill or open storage without any treatment, which not only wastes land and resources, but also pollutes the environment. On the other hand, with the increasing population, the demand for sand and gravel aggregates in the construction industry continues to grow. For a long time, because sand and gravel aggregates are widely available and cheap, they are considered inexhaustible raw materials and have been exploited at will, resulting in resource depletion, lands...

AI Technical Summary

Problems solved by technology

[0003] Some problems in the current engineering field: when prefabricated piles and immersed tube piles are sunk by hammering or vibration method, the construction noise is large, pollutes the environment, and is not suitable for use around residential areas; prefabricated reinforced concrete piles, immersed tube piles ( No matter driven in, pressed in or vibrated), they all belong to soil-squeezing piles, and dense pile group construction in saturated soft soil will cause a sharp increase in super-pore water pressure in the soil, and surface uplift (for example, within a pile area of ​​50m, the total volume of the uplift is about 40% of the buried volume), horizontal displacement of shallow soil, horizontal displacement of deep soil, piles that were set up earlier are lifted and squeezed, even bent and broken, which will cause various hazards, including the sinking of the original building Or partially lifted to cause structural damage; limited by equipment capacity, the length of a single prefabricated pile should not be too long, generally within 30m. Since the section length specifications cannot be temporarily changed, when the pile sinking cannot reach the design elevation, the pile has to be cut; the joint of the prefabricated pile is often the weak link of the pile body, and the soil squeezing effect of the pile sinking can make the pile that was driven earlier be lifted , if the pile connection is not firm, the upper and lower sections of the pile can be disengaged, and the soil squeezing effect of the immersed tube grouting pile may also cause the adjacent piles whose concrete has not yet hardened to be cut; compaction, and fully mobilize the compacted pile material and the soil around the pile in the formed composite foundation to participate in the force. This method only forms a composite foundation and does not form a pile foundation.

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