Waterproof construction method for open-cut semi-reverse construction method tunnel enclosing purlin node
A construction method and reverse method technology, applied in water conservancy projects, artificial islands, underwater structures, etc., can solve problems such as unsatisfactory waterproof effect and damage to waterproof integrity, so as to facilitate popularization and utilization, improve waterproof effect, and ensure The effect of stability
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 The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
 The invention provides a waterproof construction method for the purlin node of the open-cut and semi-reverse construction tunnel, see for details figure 1 The construction method includes the following steps: a. Before the excavation of the foundation pit, construct the enclosure structure first. When the foundation pit is excavated to the bottom of the purlin, cut a tripod under the bottom of the purlin, and then follow the Lay the first waterproof coiled material on the side; b. Construct the surrounding ...
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