1790
Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
2 SITE SITUATION
2.1
Status of construction markets
Related to the tunnel market in both Korea and abroad are
carried out using the field test and lab test. Although studies on
the maintaining the standard design of improved items are not
totally carried out, this is not yet enough to present accurate
comparison criteria since it is difficult to standardize the
property of the underground condition and the operation of
work situation in the field.
The promotion of domestic and foreign projects is seemed to
overcome the current business difficulties of the construction
industry in Korea by the slow growth of the domestic market.
The government has shown considerable interests in the
strategic approach of promoting construction projects for
development of trenchless methods.
Table 1 shows the status of construction on railway crossing
tunnel of Japan since 1986 and road tunnels market of Korea
recently in both quality and quantity. As the construction market
works on a cycle in an urban area, the market changes are pretty
good for works of trenchless tunnels. When the construction
cost of trenchless method is increasing as shown, the strength of
technology development will be greater in the future. When the
comparison of both methods is concerned, several construction
methods using trenchless are various according to the changes
of technology methods.
Table 1 Status of construction on railway and roads market
Item
Open cut
method
Trenchless
method
Remarks
No. of works
47
72
Japan
railway
Construction
cost(assumed,$)
-
133million(D)
223million(F)
Korea
roads
* D: Domestic market, F: Foreign market(predicted)
Table 2 shows the distribution ratio on railway construction
of trenchless method in Japan. According to the width of the
trenchless method, less than 10m is composed of about 50%. It
seems that trenchless methods are applied to mainly small
tunnels. According to the length of the trenchless method,
between 10m and 20m is composed of about 50%, also applied
to mainly small tunnels.
Table 3 shows the distribution ratio on railway tunnel
construction of trenchless method in Korea. According to the
width of the trenchless method, less than 15m is composed of
about 50%. It seems that trenchless methods are applied to
mainly small tunnels. According to the length of the trenchless
method, between 10m and 20m is composed of about 50%, also
applied to mainly small tunnels.
Table 2 Distribution ratio on railway construction of
trenchless method in Japan
Width
(m)
<10 10-20 20-30 >30
Ratio
(%)
48
39 10
3
Length
(m)
<10 10-20 20-30 30-40 40-50 >50
Ratio
(%)
17
49 11
9
4
10
Table 3 Distribution ratio on railway construction of
trenchless method in Korea
Width
(m)
<5
5-10 10-15 15-20 20-25 >25
Ratio
(%)
9
32 26
9
14
10
Length
(m)
<10 10-20 20-30 30-40 40-50 >50
Ratio
(%)
29
42 21
9
6
3
2.2
Status of Gwanggyo Project
Fig. 1 shows the field status, where Located at the best place of
Gwanggyo Mountain across Suwon city and Yongin city,
Gwanggyo Techno Valley (Project Agency : Gyeonggi Urban
Innovation Corporation) will be the center for the best science
technology, research and culture of the future. The Green
Network System, nature-friendly city planning, will lead to
environment-friendly business park of advanced countries that
links business and residence together in the southern part of
Seoul, Korea. Kyungbu Expressway takes traffic for South-
North, Youngdong Expressway for East-West, Youngdeok-
Yangjae Expressway for metropolitan traffic and Uiwang-
Gwacheon and national highway 42 & 43 lines for adjacent
areas, by which traffic in the area connects each other. A two-
lane traffic tunnel was to be constructed under the expressway
where many vehicles pass daily.
Figure 1 Field status in an urban area
The road tunnel construction is the scope to fulfill the
several important criteria of implementing construction projects
in developing regions, including the safety for gaining
