The present study aims to investigate the mechanical
properties of the circumferential joint of water conveyance shield tunnel at
the Sanmen nuclear power plant(phase Ⅱ). For this, radial and
tangential shear tests are conducted. In order to examine the shear properties
of circumferential joints under various residual loads, the radial shear test
is conducted under the ideal assembling condition and the concave and convex
tenon connection condition. In comparison, the tangential shear test is
conducted only under the ideal assembling condition. The results of the research
reveal the following: (1) Under ideal assembling condition, the shear force is
first borne by static friction and then by friction and tenon. Under the
concave and convex tenon connection condition, the shear force is borne by
friction and tenon. (2) The static friction, bolt, and tenon concrete act in
succession in the tangential shear test. (3) The radial shear stiffness ranges
from 4.67×108 to 1.42×109 N/m, and the tangential shear stiffness
ranges from 4.23×108 to 8.43×108 N/m before dislocation of
circumferential joints. (4) The larger is the longitudinal force, the higher is
shear stiffness.
LIU Xian
,
ZHAO Jibin
,
TAO Jing
,
ZHONG Runhui
,
ZHANG Fan
. Shear Mechanism of Circumferential Joint of Water
Conveyance Shield Tunnel Segment: a Case Study on Intake and Drainage Tunnels of Sanmen Nuclear Power Plant[J]. Tunnel Construction, 2022
, 42(10)
: 1703
-1711
.
DOI: 10.3973/j.issn.2096-4498.2022.10.004
