Underground engineering waterproof structure and construction method thereof

Abstract

The invention discloses an underground engineering waterproof structure and a construction method thereof. The waterproof structure is as follows: an enclosure structure is arranged on the side wall of a foundation pit to be excavated, a concrete bedding course is arranged on the bottom surface of the foundation pit, a template is fixedly connected to the inner side surface of the enclosure structure; and waterproof roll layers are arranged on the inner side surface of the template and above the concrete bedding course respectively. The construction method comprises the following steps of S1,making the enclosure structure on the side wall of the foundation pit to be excavated, and excavating the foundation pit; S2, pouring the concrete bedding course at the bottom of the foundation pit; S3, fixing the template on the inner side of the enclosure structure, and laying the waterproof roll layer on the inner side surface of the template; S4, laying the waterproof roll layer above the concrete bedding course, and pouring a bottom plate waterproof protective layer on each waterproof roll layer; and S5, arranging an underground engineering main body structure on the inner side of each waterproof roll layer which is arranged on the side wall and on the bottom plate waterproof protective layer. By adopting the underground engineering waterproof structure and the construction method thereof, the waterproof construction progress of underground engineering can be accelerated, the comprehensive cost can be lowered, and the safety factor of operation in the underground engineering foundation pit can be improved.

Description

technical field [0001] The invention relates to the technical field of underground engineering construction, in particular to an underground engineering waterproof structure and a construction method thereof. Background technique [0002] Underground engineering refers to the construction of various types of underground buildings or structures in the soil layer or rock mass below the ground. It includes: underground railways, tunnels, parking lots, underground shopping malls, civil air defense, basements and pipe galleries, etc. With the continuous development of urban infrastructure, due to the construction and use of underground engineering has greatly improved the utilization rate of land use, the application of underground engineering is becoming more and more extensive, but at the same time it is also facing the waterproof problem of underground engineering. Waterproofing of underground works is an important part of the quality of the whole project. If there is no well...

AI Technical Summary

Problems solved by technology

[0004] When the actual waterproof construction of underground projects adopts external anti-interior bonding, there are generally two traditional methods: (1) build steel sheet pile enclosure structure or concrete enclosure structure on the side wall of the foundation pit, and lay brick membrane on the inner side of the concrete enclosure structure , Brick-laying membranes have to go through complex processes such as laying foundation cushions, masonry, and plastering; this process can easily lead to the following problems: a. The construction period required for laying brick membranes and plastering is long; b. The material cost and labor cost required for the membrane are high; c. Due to the long construction period and the long-term exposure of the foundation pit, the foundation pit is prone to the problem of soil uplift, which increases the instability of the foundation pit enclosure structure; (2) in the concrete The inner side of the enclosure structure is used as a side wall leveling layer, and then the waterproof membrane is fixed on the treatment layer through steel nails, such as the invention patent application with the application number 201610230067.3 "Construction of pre-paved anti-adhesive waterproof membrane for large-scale underground waterproofing engineering" Method", which discloses this method. Although this invention does not require brick laying membranes and reduces the process, it still needs to apply a treatment layer, that is, a side wall leveling layer, to fill the gaps or recesses between the concrete enclosure structures. Groove, this construction method has the following problems: a. The treatment layer needs to be leveled several times with fine stone concrete or mortar to achieve the leveling effect, and it must not be too thick, otherwise it is easy to fall off, so the construction speed is relatively slow, and it costs a lot of labor. Moreover, the construction period is long, which increases the instability factor of the foundation pit enclosure structure; b. Fixing the waterproof coiled material on the treatment layer through steel nails will also cause damage to the waterproof coiled material, thereby affecting the fully sealed waterproof effect

Images