Soil-rock binary foundation pit supporting structure system

Abstract

The invention belongs to the technical field of foundation pit engineering, and particularly relates to a soil-rock binary foundation pit supporting structure system. The soil-rock binary foundation pit supporting structure system comprises a soil retaining structure and a plurality of anchor supporting members used for supporting the soil retaining structure. The soil retaining structure is an end-suspended pile or an end-suspended wall. The bottom of the soil retaining structure extends into a slightly-weathered rock stratum of a soil-rock binary foundation pit, no rock shoulder is fixedly embedded in the bottom of the soil retaining structure, and a reinforcing mesh sprayed concrete facing structure is arranged on the pit wall of the slightly-weathered rock stratum below the bottom faceof the soil retaining structure. The bottom of the soil retaining structure extends into the slightly-weathered rock stratum, self-stabilization of the pit wall of the slightly-weathered rock stratumis fully utilized, the multiple anchor supporting members are combined, a safe and reliable supporting structure system is formed, no rock shoulder is fixedly embedded in the bottom of the soil retaining structure and pre-stressed anchor cable locking feet are not arranged at the bottom of the soil retaining structure, an outer contour line of the foundation pit is compact, the influence of occupied construction sites and earth excavation on the surrounding environment is reduced, working procedures are simplified, and meanwhile, the underground obstacle effect of locking foot pre-stressed anchor cables on the later underground space development is eliminated.

Description

technical field [0001] The invention belongs to the technical field of foundation pit engineering, and in particular relates to an earth-rock binary foundation pit supporting structure system. Background technique [0002] With the rapid development of my country's modernization drive, the cause of capital construction is booming. The construction of underground projects such as real estate basements, subways, intercity railways and high-speed rail underground stations, municipal underground passages, and civil air defense underground spaces is in the ascendant. In many urban building foundation pits in my country, there is a dual stratum of upper soil and lower rock. Soil-rock binary foundation pit refers to the foundation pit where the upper part of the foundation pit is located in the ordinary soil layer, and the lower part of the foundation pit has thicker moderately weathered rock layers and slightly weathered rock layers. . Deep foundation pits of urban buildings basi...

AI Technical Summary

Problems solved by technology

[0004] Prestressed anchor cable locking feet are installed on traditional hanging feet hanging wall (pile), but for urban underground space, prestressed anchor cable is likely to become an underground obstacle in the later development of underground space

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