Non-inclined dry-operation open caisson capable of preventing water burst and land subsidence and construction method thereof

Abstract

The invention discloses a non-inclined dry-operation open caisson capable of preventing water burst and land subsidence and a construction method thereof. The non-inclined dry-operation open caisson capable of preventing the water burst and the land subsidence comprises a wall and a blade edge both made from reinforced concrete, wherein a water stop curtain and an uplift pile are arranged at the four sides of the open caisson; a bracket is arranged at the upper end of the outer wall of the open caisson; and the bracket is connected with the uplift pile by steel supports and lifting devices detached section by section. The construction method comprises the following steps of: firstly performing the construction of the water stop curtain and the uplift pile and then manufacturing the bottommost layer of the open caisson; after the desired strength of concrete is achieved, digging earth from the open caisson; uniformly controlling the lifting devices to sink the open caisson slowly, and then performing the construction of a former layer of open caisson upwards, continuing digging the earth and controlling the open caisson to sink to be at a designed elevation. Compared with the existing working well by using a retaining and protecting method, the non-inclined dry-operation open caisson capable of preventing the water burst and the land subsidence omits a foundation pit support with expensive construction cost, and the construction period is shorted; compared with the conventional open caisson, the non-inclined dry-operation open caisson capable of preventing the water burst and the land subsidence is safer, more environment-friendly, better in construction quality, non-inclined, and capable of performing dry operation without mud pollution; and therefore, the non-inclined dry-operation open caisson capable of preventing the water burst and the land subsidence is suitable for wide urban construction in China.

Description

technical field [0001] The invention relates to the field of building foundations, in particular to a caisson for anti-surge water, anti-ground subsidence, non-tilting dry operation and a construction method thereof. Background technique [0002] With the continuous expansion of the scale of urban construction in my country and the continuous improvement of urban construction requirements, many urban pipe networks have been transferred from surface laying to underground pipe jacking, and underground rail transit has also been widely used. This requires continuous excavation of working wells along the underground pipe network and subway lines or the entrances and exits of underground stations and stations. Usually, various working wells and foundation pits use reinforced concrete underground diaphragm walls, SMW construction methods, bored piles and high-pressure jet grouting supports. It is not only expensive, but also has a long construction period; although the cost of cai...

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Problems solved by technology

This requires continuous excavation of working wells along the underground pipe network and subway lines or the entrances and exits of underground stations and stations. Usually, various working wells and foundation pits use reinforced concrete underground diaphragm walls, SMW construction methods, bored piles and high-pressure jet grouting supports. It is not only expensive, but also has a long construction period; although the cost of caisson construction is relatively low, due to the different properties of the underground soil, the caisson is very easy to incline, and it is difficult to control its verticality. When the underground soil contains sand layers , it will produce quicksand, which will cause the ground outside the caisson to sink, and it cannot be used in urban construction with underground pipe networks.

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