The influencing factors and their influencing degree
of economy of large crosssectional mechanized construction of
soft rock railway tunnel are of great significance. As a result, the
construction quantities of two mechanized construction design drawings, i.e.
the large crosssectional mechanized construction and
conventional mechanized construction(bench method) of soft rock tunnel of
ZhengzhouWanzhou Highspeed
Railway, are introduced, and three sets of budgeting schemes are established
from aspects of quantity optimization and technology variation based on
existing railway cost standard and partial unit price analysis on large crosssectional mechanized construction of soft surrounding rock. The
research results show that: (1) The advance reinforcement is the main economic
affecting factor of large crosssectional mechanized
construction. (2) Compared with the conventional mechanized construction
method, the budgeting index per meter of large crosssectional
mechanized construction in Grade Ⅳa, Ⅳb and Ⅴa surrounding rocks increases by
-9.41%, 10.81% and 6.24% respectively; and the monthly advance of large crosssectional mechanized construction in Grade Ⅳ and Ⅴ surrounding rocks increases by 9.33% and 22.22%
respectively, which shows obvious economy.
WU Wei
,
QIN Weihua
,
LUO Fujun
.
Economic Analysis on Large Crosssectional
Mechanized Construction of Soft
Rock Railway Tunnel
[J]. Tunnel Construction, 2020
, 40(12)
: 1775
-1780
.
DOI: 10.3973/j.issn.2096-4498.2020.12.012
