Progress Report > Package IB - South Tunnel Section

Physical Progress | Photographs | Construction Supervision

Physical Progress

Photographs

	South Portal Area - June 2003
	Installation of formwork for pedestrian walkway of eastern side
	Cleaning drainage ditch
	Construction of foundation beam
	Inspection of double welding connection
	Placement of concrete lining for layby
	Pull-out rockbolt
	Support for Main tunnel from Km 2+121 to Km 2+124
	Setting out and surveying face No. 7
	Placement of concrete ling for Electristatic Precipitator
	Construction of evacuation tunnel's cut and cover section
	Charging for blaasting of evacuation tunnel
	Installation of reinforced steel for casting girder
	Concrete sample of bridge's girder
	Mr. Tri of inspection committee of Communist Party visited the site

Construction Supervision

Summary

During the reporting period 79.4m of Evacuation Tunnel and 137.4m of Main Tunnel Top Heading was excavated, giving a total length of 2379.3m of Evacuation Tunnel and 2396.7m of Main Tunnel Top Heading excavated to date.

Bench excavation continued with 178m being excavated on the West Side and 129.4m excavated on the East Side.

Tunnel lining continued with 10m of main tunnel, 54.9m of layby and 26m of Electrostatic Precipitator completed.

Work commenced on the Evacuation Tunnel cut and cover section.

Overall a poor months progress, slightly down in the main tunnel excavation, but down around 30% in the Evacuation Tunnel.

The Main Tunnel is just over 1m from the PKIA/IB contract boundary.  To reduce PKIA delay a subcontract agreement was signed on June 28 2003 for PKIB to excavate and primary support 450m of PKIA tunnel.

The Main Tunnel is on schedule and the Evacuation Tunnel 5 weeks behind.

Main Tunnel

A total of 137.4m of Main Tunnel Top Heading was excavated over the reporting period, giving a total length of 2396.7m of Main Tunnel Top Heading excavated to date.

Face No.7:  

– 137.4m of Top Heading excavated from St. 2+259.3 to St. 2+396.7

Bench excavation

– 146m of bench excavated from St. 1+834 to St. 1+980 and 32m from St. 2+012 to St. 1+980 (West side).

– 112.1m of bench excavated from St. 1+793.5 to St. 1+905.6 and 17.3m from St. 1+990 to St. 2+007.3 (East side)

The large geological overbreak between St. 2+119.5 and St. 2+124.5 was backfilled with concrete.

Electrostatic Precipitator 

- Excavated 71.5m of bench from St. 0+076.25 to St. 0+147.78

Tunnel Lining

Concrete for Foundation Beam –99.5m Fr. St. 1+679.4 to St. 1+778.9   (West Side)

Concrete for Foundation Beam –129.9m Fr. St. 1+ 718.6 to St. 1+848.2 (East Side)

Concrete for Tunnel Lining – 10m (1 block) from St. 6+257.555 to St. 6+267.555

Concrete Lining of layby 54.9m (9 blocks)

Concrete lining for EP 26m

Backfill grouting of tunnel lining from block 36-65

Concrete for east side duct bank – 540m

Bridge No. 1

25m of girder cast

Access Road to Water Reservoir