Reinforcement protection construction method of high steep old rubble retaining wall adjacent to deep foundation pit

Abstract

The invention discloses a reinforcement protection construction method of a high steep old rubble retaining wall adjacent to a deep foundation pit. The reinforcement protection construction method comprises the steps of adopting pressure grouting to reinforce a sinking water permeable sand layer in the foundation at the bottom of the rubble retaining wall; adding a reinforced concrete upstanding beam on a top beam of a supporting structure corresponding to the rubble retaining wall, filling the space between the upstanding beam and the retaining wall foot with plain concrete, and piling up pressure feet at the wall foot; adding a horizontal support on the top beam in the position of the upstanding beam; adding a prestressed foot locking anchor rope at the maximum horizontal deformation part in the pit; and arranging a pressure foot soil platform at the bottom of the pit corresponding to the rubble retaining wall. According to the reinforcement protection construction method, comprehensive reinforcement schemes of grouting at the foundation under the wall for reinforcement, piling up pressure feet at the wall foot, adding the horizontal support on the top beam, adding the prestressed foot locking anchor rope in the pit, arranging the pressure foot soil platform at the bottom of the pit, and the like, are adopted for reinforcement protection construction of the high steep old rubble retaining wall adjacent to the deep foundation pit, so that a temporary scaffold construction platform is not needed to be set up for aloft work, the wall structure of a rubble retaining wall body is not needed to be damaged, and the reinforcement protection for the rubble retaining wall is achieved during the pit excavation process through an external multiple-comprehensive technology measure.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a reinforcement and protection construction method for a high and steep old rubble retaining wall adjacent to a deep foundation pit. Background technique [0002] With the rapid development of cities, in order to improve land utilization, modern buildings are developing in depth and height. Buildings in central urban areas often adopt multi-storey basement structures. However, the conditions of the construction site and the surrounding environment are very different. On the one hand, the building foundation pit is getting deeper and deeper, sometimes even exceeding 20 meters; on the other hand, the surrounding buildings (structures) outside the red line of the site are also extremely complicated. In addition to subway tunnels and municipal roads, high and steep slopes and rubble retaining walls are also very common. On the retaining walls, there are often traffic ro...

AI Technical Summary

Problems solved by technology

The former can improve the integrity and overall rigidity of the rubble retaining wall structure, but the effect of grouting reinforcement cannot be accurately controlled, nor can it solve the deformation problem caused by the change of foundation stress during the excavation of deep foundation pits; although the latter It can solve the deformation problem of the retaining wall, but because the anchor cable construction needs to penetrate the rubble retaining wall, it will cause direct damage and injury to the wall structure

In addition, the construction of the two reinforcement methods requires the construction of a temporary construction operation platform for high-altitude operations, which not only increases the construction cost, but also presents construction inconvenience and construction safety hazards

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