Construction method and construction structure for earth-rock foundation in complex karst geology

Abstract

The invention provides a construction method and construction structure for an earth-rock foundation in complex karst geology. The method is characterized in that when a rugged bearing layer and a mud groove are encountered in foundation construction, the mud groove is cleaned at first; for a deep mud groove area with the depth greater than 1.5 B, a shallow mud groove area with the depth greater than or equal to 1.5 B and the depth smaller than or equal to 1.5 B is cleaned for completely cleaning mud; after the replacement and filling conditions are met, a graded gravel cushion layer is constructed, and B refers to the long edge of the foundation; the extension length of the edge expanding area of the graded gravel cushion layer from the outer edge of the foundation is greater than or equal to 300 mmm, so that the stress requirement of the foundation is ensured; and after the construction of the graded gravel cushion layer is completed, concrete cushion layers are constructed above the graded gravel cushion layer and right under the foundation, and the width of the concrete cushion layers is at least 150 mm larger than the outer edge of the foundation. The technical problem of the foundation construction in the karst geology is solved, and the defects in the prior art are overcome. The construction method and construction structure belong to the field of building foundation construction.

Description

technical field [0001] The invention relates to a construction method and construction structure of an earth-rock foundation in complex karst geology, and belongs to the technical field of building foundation construction. Background technique [0002] In areas with rich karst geological development, uneven bearing layers and mud troughs are prone to appear during building foundation construction, which brings great challenges to building foundation construction. It is necessary to carry out large-scale excavation for the area below the bearing area of ​​the foundation, and in the process of large-scale excavation, it is easy to disturb the bearing layer of the foundation, destroy the bearing structure of the original bearing layer, and have a huge impact on the bearing capacity of the foundation. Therefore, the construction technology and requirements for foundation treatment are quite strict. Therefore, it is urgent to invent a construction method and construction structur...

AI Technical Summary

Problems solved by technology

It is necessary to carry out large-scale excavation for the area below the bearing area of ​​the foundation, and in the process of large-scale excavation, it is easy to disturb the bearing layer of the foundation, destroy the bearing structure of the original bearing layer, and have a huge impact on the bearing capacity of the foundation

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