Excessive consumption of concrete is a common problem
in tunnel projects. Controlling excessive consumption of concrete is both the
key and most difficult aspect of construction cost control. Accordingly, to
effectively reduce construction costs, reasonably determine tunnel concrete
consumption standards, and perform construction management and control, the
consumption of concrete before and after construction is calculated and
evaluated in terms of the cause of concrete consumption, consumption
composition, consumption quantitative analysis, and the influence of the
outline of the secondary lining formwork trolley. The following results are
obtained. (1) The consumption of shotcrete in the primary support is mainly
related to the design quantity, rebound quantity, and average linear overbreak
quantity, and the theoretical consumption is approximately 1.6 to 3.8 times the
design quantity. (2) The consumption of concrete for secondary lining formwork
is mainly related to the design quantity and reserved deformation quantity, and
when the actual reserved deformation quantity is onethird
of the design reserved quantity, the theoretical consumption of concrete for
secondary lining formwork is approximately 1.04 to 1.12 times the design
quantity. (3) The structural strength and rigidity of the general secondary
lining formwork trolley are relatively large, meeting the requirements of selfweight or impact pressure of secondary lining formwork from concrete
pouring to initial setting, and the trolley contour does not need to be
enlarged to prevent deformation and falling back.
FANG Junbo
,
LUO Binzhi
,
LIU Hongzhen
. Quantitative Analysis and Calculation of Concrete
Consumption in Railway Tunnels[J]. Tunnel Construction, 2021
, 41(5)
: 721
-728
.
DOI: 10.3973/j.issn.2096-4498.2021.05.004