Cement-soil mixing pile type and cast-in-place pile type crown beam construction method and crown beam system

Abstract

The invention provides a cement-soil mixing pile type and cast-in-place pile type crown beam construction method and a crown beam system. The method comprises the following steps that a construction site is leveled, surveying and setting-out are conducted, the axis is fixed, pile positions are arranged, and a groove is formed; a mixing pile machine is moved in place and leveled; the mixing pile machine carries out single-width and row-up mixing pile construction; hoisting an assembly type crown beam in place, and positioning and leveling the assembly type crown beam; profile steel cement soil mixing piles / sheet piles are inserted into the blank spaces in the assembly type top beam; after the assembly type top beam is installed within the range of the width, the mixing pile machine is moved to position the assembly type top beam of the next width section; connecting the assembled crown beams of all the sections into a whole; and after construction of a foundation pit or the underground structure is completed, the assembly type crown beam is dismantled and recycled. The structure is simple, easy and feasible, the crown beam system and the enclosure structure are well combined together and can be formed at a time, resources, manpower, the construction period and the manufacturing cost are saved, meanwhile, environmental pollution is avoided, reutilization can be achieved, and the purpose of further saving the resources and the manufacturing cost can be achieved.

Description

technical field [0001] The invention relates to the technical field of foundation pit engineering, in particular to a cement-soil mixing pile type crown beam construction method, a pouring pile type crown beam construction method and an assembled crown beam system. Background technique [0002] At present, my country's geotechnical engineering is developing vigorously, and there are more and more foundation pit projects, and various foundation pit support technologies have been widely used. As foundation pits are dug deeper and the surrounding environment becomes more and more complex, vertical foundation pit support structures are especially widely used. [0003] Among the vertical foundation pit support technologies, the most commonly used are steel sheet piles, steel cement-soil mixing piles, sheet piles, pipe piles, cast-in-place piles, and underground diaphragm walls. The above-mentioned enclosure structures are all in the form of a single root and single-width structu...

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Problems solved by technology

The problems brought about by this are: the construction of reinforced concrete crown beams requires traditional processes such as chiseling the original pile heads, binding steel bars, supporting formwork, and pouring concrete, which consumes a lot of manpower and material resources, increases the construction period, and pollutes the environment. At the same time, it caused a huge waste of resources; for the crown beam or purlin that used the previous steel structure, because it could not be integrated with reinforced concrete, cement soil and other structures, it only relied on the strength and stiffness of the steel structure itself to bear the force. Big discount

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