Suspended formwork supporting device for casting lining on surface of underground continuous wall and construction method

Abstract

The invention discloses a suspended formwork supporting device for casting a lining on the surface of an underground continuous wall and a construction method. The device is arranged below the cast lining. The suspended formwork supporting device comprises a side formwork arranged vertically on the outer side of the cast lining and a bottom formwork parallel to the bottom face of the cast lining and making contact with the underground continuous wall. A horn opening for pouring concrete is formed in the upper portion of the side formwork. A powder spraying pile for supporting the bottom formwork is arranged below the side, close to the underground continuous wall, of the bottom formwork. Suspending steel bars for suspending the bottom formwork are arranged on the side, away from the underground continuous wall, of the bottom formwork. The suspended formwork supporting device has the technical beneficial effects of being good in construction operability, high in construction effect, safe, reliable, good in quality controllability and the like.

Description

technical field [0001] The invention belongs to the field of underground continuous wall construction devices. More specifically, the invention relates to a formwork support device and construction method for pouring a lining on the surface of an underground continuous wall. Background technique [0002] At present, deep foundation pits with underground diaphragm walls combined with lining support are widely used in suspension bridge anchorages, subway stations and other structures. Reinforced concrete structure lining support is mostly constructed by top-down layered pouring method. In the flowing plastic silt soft soil strata in the coastal areas of Guangdong, the main problem faced by the lining pouring is how to deal with the lining pouring foundation. The technical difficulties include: [0003] 1. The engineering geology of the deep and thick silt layer is extremely poor. The newly excavated silt layer is in a flow-plastic state, and the characteristic value of the b...

AI Technical Summary

Problems solved by technology

[0003] 1. The engineering geology of the deep and thick silt layer is extremely poor. The newly excavated silt layer is in a flow-plastic state, and the characteristic value of the bearing capacity is lower than 40kpa. It is difficult to control the base settlement during lining pouring

[0004] 2. The moisture content of saturated silt is high, and a large amount of underground water often accumulates in the lining basement during foundation pit excavation, resulting in difficulties in basement treatment

[0008] 2. The workload of excavation and replacement in the silt layer is large, and the construction efficiency is low, which does not conform to the principle of fast excavation and fast support for foundation pit support

[0011] During the construction of the existing hanging formwork support device for pouring the lining on the surface of the underground continuous wall, scaffolding needs to be erected from the foundation pit, and the workers stand on the scaffolding for construction, which leads to the workers needing to move the scaffolding to be able to move, and the moving The process of scaffolding will inevitably slow down the construction progress and indirectly increase the danger of workers

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