Construction method of water sealing system of deep foundation

Abstract

The invention provides a construction method of a water sealing system of a deep foundation. The construction method comprises the following steps: 1) constructing continuous piles or walls at the periphery of the deep foundation to be constructed, wherein the depth of the continuous piles or walls is not less than that of the deep foundation to be constructed; 2) continuously performing the operation in step 1) to form an outer closed circle around the deep foundation to be constructed through the continuous piles or walls; 3) reinforcing earth below the deep foundation to be constructed within the closed circle in a filler tamping and compacting and / or injecting and grouting manner; 4) continuously performing the operation in step 3) until all the soil in the closed circle is reinforced and a bottom closed layer is formed, wherein the bottom closed layer and the outer closed circle form a barrel-shaped water sealing system which encircles the deep foundation to be constructed; and 5) performing dewatering and earth excavating to form the deep foundation. With the adoption of the method, the formed water sealing system is stable in structure, and good in water insulation effect; large-area and long-time dewatering is avoided; the natural soil is fully utilized in the construction; the method is high in efficiency, low in cost, environmentally friendly, and free from pollution.

Description

technical field [0001] The application relates to the field of civil engineering, in particular to a construction method of a deep foundation water sealing system. Background technique [0002] With the rapid development of my country's construction industry and the continuous expansion of urban construction scale, the volume, area, height, and number of floors of buildings are also increasing. Therefore, the requirements for the bearing capacity of building foundations are getting higher and higher. The corresponding foundation The buried depth of the foundation is also increasing, and the application range and frequency of deep foundations, especially deep foundation pits, are also becoming wider and wider. Deep foundation projects are often located near dense existing buildings, roads and bridges, and underground pipelines, and their complexity is much higher than that of foundation structures or superstructures. Moreover, the treatment and construction of deep foundations...

AI Technical Summary

Problems solved by technology

However, the above-mentioned treatment method needs to continuously extract groundwater during the construction process. First, the treatment effect is slow and the construction cost increases. Second, groundwater resources have caused huge waste. Third, it is very easy to cause environmental pollution.

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