It is urgent to improve the level of tunnel waterproof
and drainage technology and realize the quantitative design of spraytype
waterproof. As a result, taking Donghuayuan Tunnel of BeijingZhangjiekou Highspeed Railway as an
example, the influencing factors such as the thickness of spraytype waterproof coating, including the engineering waterproof grade,
design service life, groundwater condition, tunnel longitudinal slope
direction, tunnel environment, spraying construction method, etc., are
analyzed. The quantitative design method of waterproof is proposed, which is
based on the basic value and recommended value of spray layer thickness at
different parts of the tunnel, and the thickness of waterproof layer is finally
determined by weighted correction. A fullyclosed spraytype quick setting rubber asphalt waterproof system suitable for
opencut tunnel is proposed, which has been
successfully applied to the Donghuayuan Tunnel waterproof design. The tunnel
automatic spraying waterproof equipment is developed, and the spraying
waterproof construction automation is realized through the computercontrolled running device and spraying manipulator, which can
replace the traditional manual spraying method. The practice shows that the
mechanical spraying efficiency is 4 times of that of the manual spraying, and
the qualified rate of waterproof inspection reaches 100%.
LYU Gang
,
WANG Ting
,
LIU Jianyou
,
YUE Ling
. Spraytype Waterproof Design and
Construction Technology of Donghuayuan Tunnel on
BeijingZhangjiakou Highspeed
Railway[J]. Tunnel Construction, 2020
, 40(12)
: 1757
-1764
.
DOI: 10.3973/j.issn.2096-4498.2020.12.010
