Synchronous grouting slurry for shield tunneling and preparation method thereof
A technology of simultaneous grouting and grouting, which is applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of high material cost and difficult disposal of by-product desulfurized gypsum, and achieves improved later strength and obvious construction. and economic benefits as well as technological innovation, good flow filling effect
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[0026] The present invention will be further described in detail below in conjunction with specific embodiments. The present invention takes a certain ultra-large diameter earth pressure balance shield tunnel project as an example, and provides detailed implementation methods and processes, but the protection scope of the present invention is not limited to the following embodiments.
[0027] In this embodiment, a new type of shield synchronous grouting slurry is used. Its composition is different from the traditional shield synchronous grouting material. Waste-made of materials including desulfurized gypsum. The test report of the desulfurized gypsum material when it enters the site is as follows-4:
[0028] Table 4
[0029] Test items
[0030] CaSO 3 .1 / 2H 2 O
[0031] The weight mixing ratio of the dry material components of the shield synchronous grouting slurry is: sand 68%, fly ash 20%, bentonite 3%, lime 2%, desulfurized gypsum 7%, and the material mixing ratio for pre...
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