A model device used to study the migration of polluted gases when pile foundations are laid in polluted sites

Abstract

The invention discloses a model device for studying migration of polluting gas during pile foundation hitting on a polluted site. The model device comprises a model box and polluting gas releasing equipment, wherein a gas dispersing pipe is arranged at the bottom of the inner side of the model box; the model box is sequentially filled with a soil layer, a fine sand layer and a gravel layer from the top to the bottom; a horizontal polluting gas isolating layer is arranged on the top surface of the soil layer; a gas collecting chamber is formed in the upper part of the model box; the gas collecting chamber is positioned above the horizontal polluting gas isolating layer; the gas collecting chamber comprises gas collecting subcells which are arranged in parallel; the horizontal polluting gas isolating layer is arranged on the bottom surface of each gas collecting subcell; each gas collecting subcell is connected with a gas collecting device; the polluting gas releasing equipment is connected with the gas dispersing pipe in the model box. The model device can effectively evaluate a migration process of the polluting gas during pile foundation construction on an organic polluted site.

Description

technical field [0001] The invention belongs to the technical fields of civil engineering, environmental engineering, and environmental geotechnical engineering, and specifically relates to a model device for studying the migration of polluted gas when pile foundations are laid in polluted sites. Background technique [0002] The pollution of organic pollutants to soil and groundwater is becoming more and more serious, which has great potential harm to the environment and human health. In order to ensure the sustainable development of the ecological environment, before the reuse of the polluted site, it needs to be treated and repaired. Horizontal isolation is an effective measure to control and remediate pollutants, and it is widely used in organic pollution sites. In engineering construction in polluted sites, especially pile foundation construction in organic polluted sites, the horizontal isolation structure will inevitably be destroyed. The destruction of the isolatio...

AI Technical Summary

Problems solved by technology

[0003] At present, a lot of work has been done on the migration of pollutant gases in the soil at home and abroad, but there are few studies on the migration process of pollutant gases in the process of pile foundation construction in organically polluted sites. There are great limitations in both numerical simulation and field test methods

Images