Self-elevating conveying and distributing system and construction method of cast roller compacted concrete dam

Abstract

The invention discloses a self-elevating conveying and distributing system and a construction method of a cast roller compacted concrete dam. The system comprises a dam outside feed device, a dam inside and outside transition belt, a dam inside conveying belt, a traveling unloader and a conveying belt jacking device, wherein the dam outside feed device is connected to the dam inside and outside transition belt, the dam inside and outside transition belt is connected to the dam inside conveying belt, and the conveying belt jacking device is used for supporting the dam inside conveying belt. Theconstruction method includes the steps: 1 mixing roller compacted concrete materials; 2 conveying the roller compacted concrete materials; 3 spreading the roller compacted concrete materials; 4 compacting the roller compacted concrete materials; 5 detecting compactness; 6 performing layer-by-layer construction until dam body construction is finished. According to the self-elevating conveying anddistributing system and the construction method of the cast roller compacted concrete dam, the dam outside feed device, the dam inside and outside transition belt and the dam inside conveying belt arecooperatively used for conveying roller compacted concrete, the transfer link of the roller compacted concrete in the conveying process is decreased, and the casting quality of the concrete can be effectively ensured.

Description

technical field [0001] The invention relates to the technical field of dam construction, in particular to a self-elevating material delivery and distribution system for pouring roller compacted concrete dams and a construction method thereof. Background technique [0002] At present, in the field of roller compacted concrete construction, the conveying and distribution of roller compacted concrete usually adopt the following methods: [0003] (1) Vehicle material transportation plan: Dump trucks transport RCC materials from the mixing station to the vicinity of the warehouse. Before entering the warehouse, the tires of the dump truck are washed. After that, the car needs to drive a section of gravel road to ensure the dehydration of the tires before entering the warehouse. Finally, unload the material evenly in sequence, and then use the bulldozer to level the material pile to complete the unwinding, and then vibrating the roller to compact the leveled concrete material. Di...

AI Technical Summary

Problems solved by technology

Disadvantages of this method: First, the car tires are not washed cleanly or dehydrated thoroughly, which is easy to pollute the warehouse number and affect the bonding quality of the roller compacted concrete layers; There are a lot of equipment in the warehouse, and there is a lot of mutual interference, which is prone to safety accidents; fourth, dump trucks frequently walk, brake, and turn in the warehouse, and frequently disturb the freshly received roller compacted concrete in the warehouse, which affects the increase in concrete strength; Fifth, when encountering corridors inside the dam, it is difficult for cars to cross the corridors;

Disadvantages of this method: First, because the coverage radius of the tower belt conveyor is generally within 100m, only part of the dam surface can be supplied and distributed, and dump trucks must be used to pick up and distribute materials in the warehouse for parts outside the coverage area. For transportation and unloading, there are many equipment in the warehouse, which is prone to safety accidents. The frequent disturbance of the dump truck to the roller compacted concrete that has just received the surface affects the increase in the strength of the concrete. Separation affects the quality of concrete; third, the tower conveyor is relatively heavy, and the installation and removal are risky and difficult;

This scheme has the following disadvantages: First, there are many equipments in the warehouse, which is prone to safety accidents; second, the frequent disturbance of dump trucks to the roller compacted concrete that has just received the surface affects the increase of concrete strength; third, the chute is easy to block the pipe, cleaning and It is difficult to install and dismantle, which affects the speed of concrete pouring

Images