Quicksand high-rise residence foundation sump construction method

Abstract

The invention relates to a quicksand high-rise residence foundation sump construction method. The construction method includes the steps: digging a sump foundation ditch to a sump bottom level, digging a small water collection well in the middle of a sump, lowering a mud pump, and covering a sand-proof steel wire net for water drawing and discharging; vertically and downwards nailing scaffold steel pipes around the sump at intervals, and erecting a double-layer formwork on the outer sides of the scaffold steel pipes in a seam-staggered manner; erecting a suspending formwork on the inner sides of the scaffold steel pipes, pouring fine aggregate concrete between the suspending formwork and the double-layer formwork to build a retaining wall around the sump, removing the mud pump in the small water collection well, and pouring fine aggregate concrete concrete to build a sump bottom thick cushion layer; bricklaying a brick moulding bed on the inner side of the retaining wall, and plastering and leveling; waterproofing, and arranging a waterproof protection layer; binding rebars and erecting a formwork for the sump, closing a valve of the water collection well, and performing reinforced concrete raft pouring on the water collection well and a foundation together. By the quicksand high-rise residence foundation sump construction method, under the premise of being without water lowering and change filling, construction of the sump can be directly performed.

Description

technical field [0001] The invention relates to a building construction method, in particular to a construction method for a high-rise residential foundation sump pit in quicksand geology. Background technique [0002] There are generally sump pits on the ground floor of high-rise buildings, which are used for water collection and strong drainage of water leakage in buildings in sudden or special circumstances. In general, the designed depth of the sump is about 2 meters deep for the raft foundation of higher-rise buildings. After the large-scale excavation of the foundation pit is completed, the earthwork excavation at the sump is generally excavated locally. However, for some special geology, such as stagnant water or quicksand layer, which is often lower than the bottom elevation of the raft foundation and happens to be slightly higher than the bottom elevation of the sump pit, it cannot be directly carried out without precipitation treatment or special treatment of the f...

AI Technical Summary

Problems solved by technology

[0005] (1) Generally, precipitation, replacement, or grouting, reinforcement and other solidification and reinforcement treatments are required, which require a longer construction period and higher construction costs

[0006] (2) The traditional method is mainly for large-area foundation treatment, and it seems a waste of resources for small-area quicksand geological treatment

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