As a byproduct of urban pipe network
construction, pipe jacking waste soil is characterized by large volume, strong
regionallity, and complex composition. The pipe jacking waste soil is not easy
to drain and consolidate due to its surface active ingredients, which restricts
the refuse of waste soil resources. To address these problems, the waste soil
generated by the pipe jacking construction of the underground comprehensive
utility in Huanggang is used as raw materials to prepare selfcompacted pipe jacking controlled low strength materials (CLSM), and
the change laws of its fluidity, bleeding rate, and compressive strength are
studied by controlling the watersolid ratio, the
cement to waste soil quality ratio, and the fly ash to cement (F/C) ratio. The
test results show the following: (1) The watersolid
ratio plays a major role in the fluidity change of CLSM, while the compressive
strength decreases with the increase of F/C, and increases with an increase in
cement to waste soil quality ratio. (2) By controlling the watersolid ratio, the cement to waste soil quality ratio, and F/C ratio,
selfcompacting and highfluidity
materials with fluidity of 100~200 mm, bleeding rate of less than 3%, and
compressive strength of 0.35~0.7 MPa can be prepared, which meets the
requirements of the trench backfilling process in terms of working performance
and strength.
HUANG Rui, LIU Guoqiang, ZHU Youzeng, ZHANG Peng
. Controlled Low Strength Materials Based on Pipe
Jacking Waste Soil and Their Property Influencing
Factors[J]. Tunnel Construction, 2021
, 41(S2)
: 346
-352
.
DOI: 10.3973/j.issn.2096-4498.2021.S2.044
