A construction method of relay type water-stop curtain

Abstract

The invention provides a construction method of a relay type water-stop curtain, which belongs to the field of construction engineering. The inner and outer sides of the present invention adopt double-row water-stop curtains for lap joint construction. The outer common high-pressure rotary grouting pile water-stop curtains are constructed from the ground to the first water-resistant layer, and the inner water-stop curtains are constructed from the water level in the foundation pit to the first water-resistant layer. The second water-resistant layer completes the lap connection between the curtains to solve problems such as water-resistant layer breaks during the construction process; the broken position of the water-resistant layer is designed with ordinary high-pressure rotary grouting piles for the back-sealing design, and the inner and outer water-stop curtains are connected. At the head position, three rows of ordinary high-pressure jet grouting piles are used for the handover between the curtains on both sides; the relief wells are reasonably arranged between the inner and outer water-stop curtains to prevent sudden surges. The present invention provides a new construction method for the construction selection of the corresponding water-stop curtain for the excavation of relatively deep foundation pits, effectively overcomes construction problems such as discontinuous water-resisting layers in deep foundation pit construction, and the method design is reasonable, safe and reliable , Has a very good promotion value.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a construction method of a relay type water-stop curtain. Background technique [0002] Generally, during the construction of deep foundation pit water-stop curtain, it needs to be embedded into the stable water-resisting layer to form a closure and block the communication of water layers inside and outside the foundation pit, but there are the following problems: [0003] One is that the excavation of the deep foundation pit is relatively deep, and it is difficult to choose the construction type of the corresponding water-stop curtain; [0004] The second is that the water-repellent layer of deep foundation pit construction is not continuous. Although there are detailed survey data, the underground conditions are relatively complex, and the construction quality of the water-stop curtain is difficult to guarantee. After excavation, water seepage and leakage often...

AI Technical Summary

Problems solved by technology

[0005] The technical task of the present invention is to provide a relay-type water-stop curtain construction method to overcome the construction problems such as discontinuous water-resisting layer in deep foundation pit construction in view of the problems in the prior art that the construction type is difficult to choose and the construction quality is difficult to guarantee.

Images