Construction method of composite fireproof coating for foam glass insulation layer of highway tunnel in cold region
A foam glass and construction method technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of foam glass insulation board falling off, low moisture absorption rate, low water absorption rate, etc., and achieve increased structural strength, reliable stability, strong bond effect
Active Publication Date: 2020-01-31
ZHEJIANG ROAD & BRIDGE CONSTR
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Problems solved by technology
[0003] In the prior art, foam glass insulation board is usually used. As a kind of inorganic insulation material with good performance, foam glass insulation board has long service life, good volume stability, low water absorption rate, low moisture absorption rate and low water vapor permeability. , high flame retardancy, etc., it is used in the construction of tunnels in alpine regions, but the seams left during the installation process will cause insulation leaks and affect the overall insulation effect, and the relatively heavy weight of the foam glass insulation board makes the foam glass insulation board Safety accidents that fall off occur from time to time, seriously affecting the application prospect of foam glass insulation board insulation materials in the construction of tunnel insulation layers
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[0027] Example: such as Figures 1 to 6 Shown, a kind of construction method of foam glass insulation layer composite fireproof coating of highway tunnel in cold area, above-mentioned construction method comprises the following steps:
[0028] Step a: Fix the U-shaped fixture 4 on the second tunnel lining 7 with the locking piece 5. The locking piece 5 can use expansion bolts. The process of installing the expansion bolts is relatively simple, which is convenient for the operator to install. 7 is the molded concrete or reinforced concrete lining applied on the inner side of the initial support in the tunnel engineering construction, which together with the initial support form a composite initial laying. The second lining of the tunnel and the initial support are relatively speaking. Under the conditions of support, the inner layer lining is constructed with concrete and other materials to achieve the functions of strengthening support, optimizing the route waterproof and drai...
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Abstract
The invention relates to a construction method of foam glass insulation layer composite fireproof coating for a highway tunnel in a cold region. The construction method comprises the following steps that step a, U-shaped clamping pieces are fixed to a second lining of the tunnel with locking pieces; step b, keels are fixed on the U-shaped clamping pieces with fasteners; step c, foam glass insulation boards are fixed on the second lining of the tunnel, and a gap between the foam glass insulation boards and the tunnel second lining is filled with mortar adhesive; step d, gaps between every two foam glass insulation boards are filled with foaming cement; and step e, grid cloth is laid along the top surfaces of the foam glass insulation boards and the keels. According to the construction method, the gaps between every two foam glass insulation boards are filled with the foaming cement, the foaming cement is used as a heat insulation material for filling the gaps as well as filling heat insulation loopholes caused by the gaps, the foaming cement is beneficial to the popularization and application of the construction method in the technical field of tunnel insulation, and has higher benefits.
Description
technical field [0001] The invention relates to the technical field of tunnel heat preservation, in particular to a construction method of a foam glass heat insulation layer composite fireproof coating for highway tunnels in cold regions. Background technique [0002] Tunnel construction in alpine regions requires thermal insulation and waterproof layers to prevent various frost damage caused by water seepage and accumulated water. For example, frost heaving increases the volume of accumulated water by 9%, which adds huge pressure to the tunnel and changes the stress of the tunnel. The environment affects the stability and safety of the tunnel and reduces the service life of the tunnel. In the harsh climate and difficult geological environment in the alpine region, the tunnel must achieve thermal insulation effect and reduce the impact of frost heave on the tunnel, which puts high demands on thermal insulation. requirements. [0003] In the prior art, foam glass insulation ...
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IPC IPC(8): E21D11/10E21D11/00
CPCE21D11/00E21D11/10
Inventor 沈坚强支彥锋韦麟徐建国韦宇生黄新杨鹏春王端贵马辉
Owner ZHEJIANG ROAD & BRIDGE CONSTR