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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[0019] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0020] The invention provides a waterproof construction method for the purlin joints of open-cut and semi-reversed tunnels. For details, see figure 1 , the construction method comprises the following steps: a. Before the excavation of the foundation pit, construct the enclosure structure earlier. Lay the first waterproof membrane on the side; b. Construct the purlins and the supports connected to the purlins during construction. After the purlins are constructed, continue to excavate the foundation pit downwar...
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