City internal river watercourse desilting construction process

Abstract

The invention relates to a dredging construction technology for urban inland rivers, which belongs to general river engineering, and has a patent classification number: E02B1 / 00. It is characterized in that the process includes the following steps: (1) underwater dredging, excavation and loading: (2) waterway transportation: (3) unloading and storage: (4) returning to the dredging site with an empty ship; The advanced technology is especially suitable for the dredging construction of urban inland rivers; the selection of equipment is reasonable, the movement is flexible, the operation is convenient, safe and efficient, the quality of dredging is reliable, and it meets the requirements of environmental protection. It is a construction technology integrating excavation, transportation and unloading operations.

Description

Technical field [0001] The invention relates to a construction process for dredging urban inland rivers, belonging to an underwater dredging project of rivers, with a patent classification number: E02B1 / 00. Background technique [0002] my country has a vast territory and many urban rivers. As the blood of the city, each river has different functions such as drinking, flooding, drainage, tourism, and shipping. Therefore, in order to maintain the cleanliness, permanent safety and vitality of urban rivers, it is necessary to timely dredge the urban inland rivers. [0003] The dredging of urban inland rivers currently mainly relies on the following techniques: [0004] (1) Mud pump dredging: The equipment adopts hydraulic dredge, which is composed of vertical mud pump mud conveying system, high pressure pump mud flushing system, power distribution system or diesel generator system. Simulate the principle of water flow scouring, use hydraulic action to excavate, transport and fill so...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages are: the river needs to be closed in sections, and the water should be removed before implementation; the laying of mud pipelines should not exceed 100m, and a mud dump needs to be set up; it is impossible to crush and remove construction waste in the river

[0006] (2) Using cutter suction dredger: Disadvantages: 1) It needs a mud discharge site, and the mud discharge site occupies a lot of land; it needs to erect pipelines and multi-stage pressurized pump stations; Floating, blocking the channel and affecting the navigation of the river; 2) Limited by the height of the bridge, it is difficult for dredgers to pass; 3) It is necessary to remove a large amount of sundries such as underwater riprap and construction waste, which makes construction difficult and may easily cause damage to the reamer and Pipelines are clogged; 4) The slope tooth feet on the bank and the work under the bridge cannot be dredged in place at one time; 5) The secondary pollution of the backwater of the sludge discharge field needs to be treated

[0009] Disadvantages: 1) Flat barges and mud boxes are required for transportation, and the cost is high; 2) Amphibious excavators can only work in the range of 1.5-2 meters in water depth, and the excavation of deep trenches is limited; 3) Secondary transportation requires The 50t crawler crane lifts the closed box onto the transport vehicle and transports it to the mud discharge yard

Hoisting operations cannot be carried out when the wind force exceeds level 5, which is unsafe

[0010] In view of the shortcomings of the above-mentioned equipment in the dredging project, according to the special humanistic and environmental protection requirements of the city, and the complex geographical environment of the urban inland waterway, such as many bridges, many underwater pipelines and telecommunication optical cables, complex layout, and many construction wastes, etc.; People need a kind of technology that can overcome above-mentioned shortcoming, environment-friendly, urban inland river channel dredging

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