シールド工事から発生する泥土改良システムの開発 泥土圧シールド工法では、掘削土に加泥材を添加し、混合撹拌して塑性流動化を図っている。このため掘削土は泥状を呈し、一般に産業廃棄物(建設汚泥)として処理されている。
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Development of a system to treat and recycle sludge arising from shield work To reduce sludge generating from construction work and to recycle it for use as backfill and other materials, this system processes excavated soil in the mud discharge process of mud pressure shielding to (Categories 3 and 4) improved soil for use as construction soil. Features include the operation carried out in the mud discharge process and automatic addition of an improver according to mud flow rates measured with electromagnetic flowmeter and water contents with neutron moisture meter. The quality of improved soil is more stable than that obtained by conventional systems. This paper reports the details of the system, the improver, and various test results.
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