A horizontal-vertical drainage plate-flocculation vacuum pre-pressed sludge treatment method

Abstract

The invention discloses a horizontal-vertical water draining plate-flocculation vacuum preloading sludge treatment method. The method comprises the steps that firstly, the top and the bottom of each reinforcing steel bar of each reinforcing steel bar frame are provided with electroosmosis electrodes, and the electroosmosis electrodes are connected with a power source through wires; secondly, sludge is blown and filled to the bottommost layer in a vacuum preloading groove, each reinforcing steel bar frame is sleeved with a support, and a clamp is used for tight clamping; thirdly, transverse water draining plates penetrate through the support, and one ends of the transverse water draining plates are connected with bent pipes; fourthly, the second step and the third step are repeated until sludge is blown and filled into the surface layer of the vacuum preloading groove; fifthly, vertical water draining plates are perpendicularly constructed between two adjacent rows of reinforcing steelbar frames, each row of vertical water draining plates are connected with one transverse water draining pipe, the multiple rows of transverse water draining plates are gathered through first joint pipes and are connected with a vacuum pump; and sixthly, the bent pipes are connected to first joint pipes through second joint pipes, then, a geotechnical cloth is laid, a seal film is laid, and finally, the vacuum pump and the power source are started. Through the method, the soil transverse displacement is small, the vacuum transmission is better, and soil reinforcing and electroosmosis water draining are considered.

Description

technical field [0001] The invention relates to a horizontal-vertical drainage board-flocculation vacuum pre-pressing sludge treatment method. Background technique [0002] At present, the vacuum preloading treatment of soft soil foundation is mainly to form negative pressure through vacuum devices and sealing systems, mainly using vertical plastic drainage boards as vertical drainage bodies to transmit negative pressure to the deep layer of the soil to form a gap between the drainage board and the outside world. The pressure difference in the soil promotes the water in the soil to flow through the pores of the soil, and the drainage board is much more permeable than the soil, so the fluid gathers and is drawn out to the drainage body, so the vertical drainage board reduces the drainage distance, It greatly shortens the consolidation time of the soil and improves the reinforcement effect of the soil. Therefore, it is widely used as an economical and reliable geotechnical mat...

AI Technical Summary

Problems solved by technology

However, vacuum preloading using vertical drainage boards also has its disadvantages in soft ground treatment: due to well resistance and smearing effects in the process of vacuuming, the degree of vacuum will vary with depth and radial direction during the transmission process. Attenuation, especially the vacuum preloading of vertical drainage boards. Due to the vertical consolidation of the soil caused by vacuum preloading, it is easy to bend and bend the drainage boards, which hinders the vacuum transmission and causes fine particles to enter the filter membrane and the board core. It causes the silting problem of the vertical drainage board, so the reinforcement effect on the soil at the bottom and the radial distance is not good, and it is easy to form a soil column near the drainage board, which blocks the drainage path and leads to uneven consolidation of the soil, and finally The average consolidation degree of the entire reinforced soil is not high, resulting in unsatisfactory reinforcement effect

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