Open caisson construction method of reinforced concrete for soft soil layer

Abstract

The invention provides an open caisson construction method of reinforced concrete for a soft soil layer. The open caisson construction method specifically comprises the followings steps: 10, barriers on the bottom of a wall blade of an open caisson are removed, water is supplied from a water source, and the water is pressurized to a pressure higher than 1.2 MPa; 20, the high-pressure water is utilized to impact soil mass in a tube body, and the broken soil mass and water sprayed from a water gun are mixed into slurry; 30, the slurry is pumped and delivered to the outside of the tube body of the open caisson; and 40, the tube body of the open caisson subsides gradually due to self gravity along with gradual reduction of soil surface in the tube body of the open caisson. The open caisson construction method disclosed by the invention can avoid over-digging of the bottom and the phenomena of sudden subsidence of the open caisson because hydraulic power is utilized to break oil, is easy to ensure the construction quality of the open caisson, can effectively control the soil breaking program and position, can enable the open caisson to subside steadily, is convenient for controlling the final subsiding elevation of the open caisson, and reduces the engineering cost.

Description

【Technical field】 [0001] The invention relates to a construction method of a reinforced concrete caisson, in particular to a construction method of a reinforced concrete caisson which utilizes hydraulic power to flush and suck mud and discharge soil. 【Background technique】 [0002] The caisson foundation has many advantages such as strong integrity, good stability, large bearing area, large vertical load and horizontal load, low cost, and good seismic performance. It has been widely used in many fields. . [0003] The existing reinforced concrete caisson construction method generally adopts manual excavation or large-scale mechanical excavation, and the subsidence rate will be too fast or sudden subsidence phenomenon will occur. The sinking of caissons by manual excavation is low in efficiency and labor-intensive; while the sinking of caissons by mechanical excavation requires large-scale mechanical equipment, high energy consumption, high cost, and hidden dangers in constr...

AI Technical Summary

Problems solved by technology

Moreover, these two construction methods are often difficult to control the verticality of the sinking of the caisson, and the construction is also troublesome.

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