Bacillus lentus and method for generating by inducing bacillus lentus for reinforcing foundation

Abstract

The invention provides bacillus lentus and a method for generating by inducing bacillus lentus for reinforcing foundation, the bacillus lentus URIC, the bacillus lentus UR9D, and the bacillus lentus UR52 are preserved in China General Microbiological Culture Collection Center (CGMCC) on August 29, 2012; the method comprises: firstly, respectively fermenting and culturing a single bacterium colony of bacillus lentus in a fermentation medium, then grouting in two steps, filling bacteria liquid into a sand column pumped with deionized water, and filling a mixed solution of reaction solution calcium chloride and urea, to form a microbe-calcium carbonate-sand grains consolidating body in a sand grain-solution system, and furthermore to enhance bonding degree and intensity of the sand grains. The bacillus lentus and the method of the invention has advantages of short solidification time, good effect and low cost, and will not cause pollution on environment.

Description

Technical field [0001] The invention relates to the technical field of foundation reinforcement, in particular to Bacillus lentus and a method for inducing calcium carbonate to be produced for foundation reinforcement. Background technique [0002] Foundation reinforcement is an extensive and important engineering practice activity in civil and geotechnical engineering. Insufficient bearing capacity of the foundation soil will lead to the settlement of roads and railways, the instability of dams, dunes and slopes, and excessive erosion of coasts or river banks. Earthquakes or traffic vibrations can cause liquefaction of soft and loose foundation soil. Oil and gas drilling projects or excavation of foundation pits in loose rock and soil are often severely affected by quicksand and fluid soil. In economically developed deltas, land reclamation, reinforcement of weak foundations, and improvement of foundation density and stability are also important issues. [0003] Traditional che...

AI Technical Summary

Problems solved by technology

However, the traditional geotextile reinforcement technology has the problem of insufficient durability; the chemical grouting based on cement or lime or organic glue has a great impact on the environment, and greatly reduces the water permeability of the foundation, hindering the seepage of groundwater, and the single effective grouting radius is small, Low economic performance, which makes large-scale foundation reinforcement very difficult; and physical reinforcement methods such as foundation replacement, pile foundation and dynamic compaction have low technical and economic performance

Images