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Japan-Korea tunnelNagoya Castle Survey Slope Site

Japan-Korea Tunnel / Kyushu Karatsu Survey Slope (XNUMXst-XNUMXrd Phase Construction Section)

Japan-Korea Tunnel / Karatsu Nagoya Castle Survey Slope (planar / vertical cross section)

Survey of Karatsu, Saga Prefecture History of inclined shaft construction site (PDF / photo)

• (From January 24, 1 to December 1, 24)
• I. Assets
• Ⅰ-1. Current assets
• Ⅰ-2. Fixed assets
• Ⅱ. Debt section
• Ⅱ-1. Current liabilities
• Ⅲ. Net property section

Japan-Korea Tunnel Plan / Kyushu Karatsu Survey Slope XNUMXrd Phase Construction Temporary Design Plan Outline

Planning agency: International Highway Construction Corporation
Executing agency: Far East Development Co., Ltd.

1. Equipment overview

With a construction period of about 500 years since the start of the survey inclined shaft, the construction of the first and second surveyed inclined shafts was almost completed, and the stage of temporary equipment replacement, which was originally planned, was reached.Temporary equipment for the second phase construction, especially the capacity of the hoisting winch, etc. corresponds to the scale of excavation length of about 1,410 m, while for the third phase construction and below, the design inclined shaft length, temporary materials from XNUMX m, etc. The ability to unwind is required.
In addition, it is necessary to plan the expansion of power receiving equipment, water supply equipment, drainage equipment, air supply equipment, ventilation equipment, etc.In addition, along with the extension of construction, it will be necessary to construct new muddy water treatment facilities and injection facilities for flooding.However, if it is required to continue excavation for the time being, it is considered possible by changing the hoisting winch power receiving equipment and adding some other equipment.

XNUMX. Change of hoisting equipment

The equipment (PUC-500T) of about XNUMX m until the second phase construction is as shown after the item, but in the third phase and below, the equipment specification conditions differ greatly as the excavation extension increases.
The outline is shown below.

XNUMX-XNUMX Basic conditions	Mine inclination angle:☆　θ = 14 ° 02' Diagonal length:☆　L¹ = 1400m Hoisting distance:☆　L² = 1500m Weight of cargo: Mining vehicle 2700kgf / vehicle x 5400 vehicles = XNUMXkgf Mining vehicle contents: 1.7tf / m³ x 4.3m³ x 15300 = XNUMXkgf Car: 12-seater Hoisting speed:☆　υ = 150m / min ☆ mark is common to both mining car winding and human car winding
XNUMX-XNUMX Equipment specification	2-2-1 Mining car hoisting machine	XNUMX) Loading condition	W¹ Mining vehicle weight 2700kgf x 5400 = XNUMXkgf Load 1700kgf / m³ x 4.5m³ / car = 15300kgf ∴W¹ ＝ 5400 ＋ 15300 ＝ 20700kgf W² Wire rope own weight 2.59kg / m × 1500 = 3885kgf
		XNUMX) Rope tension	P＝W¹（sinθ＋μcosθ)＋W²（sinθ＋μ′cosθ)＝20700（sin14°02′＋1/60cos14°02′）＋3885（sin14°02′＋1/10cos14°02′）＝5430＋1320＝6750≒6800kgf And
		XNUMX) Motor output
		XNUMX) Rope factor of safety	Rope diameter used: φ25 (Toughrop) Breaking force used: BS = 50.1 tf
		XNUMX) operation	The operation shall be manual operation from the winding room. However, when operating in a certain section (wellhead → bottom), acceleration → full speed → deceleration → stop is automatically performed.Since the face part changes with excavation, the stop switch and the excess switch will be relocated.
	XNUMX-XNUMX-XNUMX Car hoisting machine	XNUMX) Loading condition	W¹ Vehicle weight 7160kgf (including hanging hardware) W² Wire rope own weight 1.99 × 1500m ＝ 2985 kgf
		XNUMX) Rope tension	P ＝ W¹ (sinθ ＋ μcosθ) ＋ W² (sinθ ＋ μ ′ cosθ) ＝ 2070 ＋ 1013 ＝ 3083 ≒ 3100kgf.
		XNUMX) Motor output
		XNUMX) Rope factor of safety	Rope diameter used: φ22 (Toughrop) Breaking force used: BS = 38.5 tf
		XNUMX) operation	Basically, Similar to mining car hoisting machine

XNUMX. XNUMX.Power equipment

The total power used in this construction is 948kw, but the plant equipment (22kw) and sprayer (15kw) are not used during excavation.Also, since the jumbo drill and the hoisting machine for scraping are not used at the same time, it is considered that 700kw of contract power is sufficient.

Survey slope construction site plan view of Karatsu, Saga Prefecture (new hoisting machine)

Survey slope construction site in Karatsu, Saga Prefecture (winding layout)