A soil-rock dual element foundation pit support structure system

Abstract

The invention belongs to the technical field of foundation pit engineering, and specifically relates to an earth-rock binary foundation pit support structure system, including a soil retaining structure and multi-channel support and anchor components for supporting the soil retaining structure; the soil retaining structure is a hanging pile or Hanging foot wall; the bottom of the retaining structure extends into the micro-weathered rock formation of the soil-rock binary foundation pit, and there is no rock shoulder embedded in the bottom of the retaining structure, and steel bars are arranged on the pit wall of the micro-weathered rock formation below the bottom of the retaining structure Mesh shotcrete cladding structure. The present invention extends the bottom of the retaining structure into the micro-weathered rock stratum, fully utilizes the self-stabilization of the pit wall of the micro-weathered rock stratum, and combines multiple support and anchor components to form a safe and reliable support structure system. Shoulder embedding and prestressed anchor cable lock feet, the outer contour of the foundation pit is compact, which reduces the construction site occupation, earthwork excavation and the impact on the surrounding environment, simplifies the process, and eliminates the impact of the lock foot prestressed anchor cables on the later underground space development underground barrier effect.

Description

technical field [0001] The invention belongs to the technical field of foundation pit engineering, in particular to a soil-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 railway underground stations, municipal underground passages, and civil air defense underground spaces is in the ascendant. In many urban construction foundation pits in our country, there is a dual stratum of upper soil and lower rock. . The deep foundation pits of urban buildings basically do not have the conditions for grading and excavation. The foundation pit support system generally consists of lateral retaining structures (such as underground diaphragm walls or piles) and horizontal supports (such as steel supports, reinforced concrete supp...

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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