Combined type casing milling joint device and construction method thereof

Abstract

The invention relates to a combined type casing milling joint device. The combined type casing milling joint device comprises a joint device and accessory devices; the joint device sequentially comprises a guide layer, a middle waterproof layer and an isolation layer; the inner side of the middle waterproof layer is bonded with the guide layer; the isolation layer is attached to the outer side of the middle waterproof layer in a non-fixed mode; the guide layer is used for being fixed to the side of a reinforcement cage in a profiling mode; the accessory devices are located on the two sides of the reinforcement cage and cover the milling area, and the gap between the milling area and the joint device is larger than zero; each accessory device is provided with a connecting structure, and the connecting structure and the isolation layer are connected into a whole. The anti-permeability of an underground connecting wall is improved, the flatness of the underground connecting wall is enhanced, and the guide layer is in a broken line shape, so that shear resistance of the joint is facilitated.

Description

technical field [0001] The invention relates to a combined casing milling joint device and a construction method thereof, belonging to the technical field of underground diaphragm wall construction. Background technique [0002] Although the underground diaphragm wall is a "diaphragm wall", the actual construction is to excavate grooves and pour concrete in sections. It is necessary to install joints at one or both ends of the groove section in contact with the soil layer to avoid direct contact between concrete and soil and ensure joints Has a certain ability to stop water. [0003] At present, when the ground wall enters a relatively hard soil layer or the depth of the groove is large, and the surrounding environmental protection requirements are high, the sleeve milling joint is generally used. This technology is a construction process based on a double-wheel milling machine. The milling wheel rotated by the double-wheel milling machine uses the alloy teeth on the millin...

AI Technical Summary

Problems solved by technology

However, the sleeve milling joint is essentially a flexible joint, especially for non-circular foundation pits. Once the foundation pit is deformed, water leakage is likely to occur at the joint position, and an additional separate water-stop curtain is required, which increases the project cost

[0005] In addition, the width of each trough section is narrow (for example, 2.8m), and the number of joints is large. When troughing, adjacent trough sections are likely to be uneven in the vertical direction of the ground wall, similar to the phenomenon of "staggered platform", which affects the quality of trough forming

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