Construction method of water getting vertical shaft under complex geological condition

Abstract

The invention provides a construction method of a water getting vertical shaft under the complex geological condition, wherein the water getting vertical shaft is excavated in a tunneling mode of artificial mechanical breaking combined with explosion of a small explosive quantity. A lining of the water getting vertical shaft adopts the construction schemes of borehole grouting consolidation, temporary supporting and permanent lining parallel operation, frequency of supporting and lining is increased, and the single roundtrip lining height is reduced. Aiming at stratum situations of different lithological characters, different excavation and tunneling methods are adopted. Comprehensive construction measures such as air pick excavation and tunneling, short footage and close following of brick wall temporary support are adopted on loosen rocks and quicksand layers. The construction method has the advantages that in the whole construction process, effective dynamic management is carried out, the construction schemes take different adverse factors into consideration, and corresponding measures are made. In the construction, problems can be found and then processed timely, on-the-spot management is enhanced, construction is organized elaborately, and safety and high quality of construction of the water getting vertical shaft are ensured.

Description

technical field [0001] The invention relates to the field of construction, in particular to a construction method for shafts under complex geological conditions. Background technique [0002] The construction of the water intake shaft is an underground operation, which is relatively dangerous. In addition, the geological conditions are complex, the formation lithology changes greatly, and large-scale karst caves and quicksand appear, which adds difficulty and danger to the construction of the water intake shaft. According to geological data, the lower part of the shaft is in the fractured zone of the stratum, and the rock mass in the fractured zone is broken, showing a fragmented structure, disordered development, poor integration, and the gaps are filled with yellowish-brown silty sand. Moreover, karst is well developed in this layer, and the scale of the cave is large, and the space is filled with quicksand. The quicksand layer has no cohesion, is easy to collapse, and flo...

AI Technical Summary

Problems solved by technology

[0002] The construction of the water intake shaft is an underground operation, which is very dangerous. In addition, the geological conditions are complex, the formation lithology changes greatly, and large areas of karst caves and quicksand appear, which adds difficulty and danger to the construction of the water intake shaft.