Muck improvement material for earth pressure balance jacking pipe in anhydrous sand layer

Abstract

The invention relates to a muck improvement material for an earth pressure balance jacking pipe in an anhydrous sand layer, the muck improvement material is composed of an improver and a filler, the improver is formed by uniformly mixing and stirring bentonite, loess, an admixture and water, the bentonite is sodium bentonite, the loess is Q3 loess, the admixture is polyacrylamide (PAM) and water glass, the mass ratio of the sodium bentonite to the Q3 loess to the polyacrylamide (PAM) to the water glass to the water is 50-70: 30-40: 1-2: 20-30: 1000; the filler is formed by uniformly mixing andstirring loess and water, the loess is Q3 loess, and the mass ratio of the Q3 loess to the water in the filler is 1: 0.8-1. By applying the method, the improvement effect of muck cut off from the tunnel face in the soil cabin during jacking construction of the jacking pipe in the anhydrous sand layer can be effectively improved, the settlement displacement of the soil body in front of the tunnelface is effectively reduced, and the method has positive significance in jacking pipe engineering construction.

Description

technical field [0001] The invention relates to a material for pipe jacking construction and a preparation method thereof, in particular to a dreg improvement material for pipe jacking with earth pressure balance in an anhydrous sand layer, which is mainly used for slag in an anhydrous sand layer for earth pressure balance pipe jacking construction soil improvement. Background technique [0002] With the rapid development of domestic urbanization, due to the limited space above ground, underground space has been widely developed and utilized. Underground pipelines and underground passages have become an important part of the intricate network system of modern cities. The construction of urban underground pipeline network and underground transportation lines usually adopts two methods: open-cut construction and underground construction. Open-cut construction usually leads to damage to urban road surfaces, traffic congestion, and various environmental problems such as urban g...

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Problems solved by technology

At present, there is no relevant research on the materials and preparation methods of the muck modifier used in pipe jacking construction in anhydrous sand layers in China. The ingredients, proportions and preparation methods used in the construction are completely determined by experience, and there is no test data support. , the improvement effect on the dregs cut off from the face of the face during pipe jacking construction in anhydrous sand layers is poor, and it is difficult to discharge soil from the soil tank, and the pressure in the soil tank is high, which is prone to uplift

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