📋 Tender Overview
The contractor exceeded 50 percent. advancement of boring a road tunnel in Stare Bogaczowice along the S3 expressway which is located between Bolkw and Kamienna Gra.The most important element of the construction of the S3 expressway on the Bolkw - Kamienna Gra North section is the construction of two road tunnels - TS-26 approx. 2300 m long and TS-32 approx. 320 m long. TS-26 tunnel The structure of the TS-26 tunnel consists of two main aisles for vehicle traffic - the left east 2 301.88 m long and the right west 2 272.20 m long eight transverse evacuation passages and one emergency passage in the middle of the tunnel. Current status of worksUntil August 23 this year. portals southern and northern tunnel drilled TS-26 nave Southwestern 879.50 m calotte upper part of the tunnel nave southeastern 889.40 m calotte nave northwestern 226.40 m calotte north-eastern nave 276.90 m calotte The advancement on the eastern thread is currently 52.7 and on the western thread - 50.09. The pace of boring the tunnel is approximately 252 mb per month for both aisles in total. If the current pace of work is maintained it is expected that the deadline for penetration of the tunnel will be in the first half of 2022. Currently on average about 81 machines and about 90 employees work on the TS-26 facility daily. The contractor has already started the construction of two of the eight transverse passages connecting both aisles of the tunnel. 100 cross-pass no. 7 has been completed and another cross-pass no. 8 is being completed. We wrote about it HERE. Boring method The TS-26 tunnel is a new Austrian NATM method which was selected among others by due to the geological structure of the rock mass the large cross-section of the tunnel and its length. The basic principle of the NATM method is to use the self-supporting effect of the rock mass as much as possible which is the basic element of the initial lining. The most important steps in this tunneling method are the correct excavation use of the natural stress distribution and immediate fabrication of the pre-support. TS-32 tunnel On the shorter road tunnel TS-32 on the S3 route the works related to excavation and securing the slopes were completed. The contractor has started the construction of concrete tunnel segments of which there will be 27 in total. The progress of works to date includes the execution of - 100 percent of excavations which in the conversion amount to 223 331 m3 - 100 percent. securing slopes - 8 out of 27 non-structural concrete segments - 12 percent. foundation reinforcement which equals 63000 kg of steel - 14 percent concrete foundations which is 657 m3. Drilling method The TS-32 road tunnel is implemented using the Cut Cover mining method i.e. open trench. Investment calendar - October 17 2018 - signing the contract with the contractor - October 31 2018 - signing the contract with the investors supervision - October 31 2019 - submission of an application for a permit to implement a road investment ZRID - August 21 2020 - obtaining a ZRID decision with immediate enforceability - II half of 2023 - contractual completion date of construction works. Contractor of works consortium of companies PORR SA from Warsaw leader PORR Bau GmbH from Vienna partner Investor supervision consortium of companies DT SA from Katowice Inko Consulting from Pszczyna Contract value PLN 1536561957.32 Contractual the value of the entire S3 expressway under construction from Bolkw to Lubawka is estimated at almost PLN 2.5 billion. The investment is co-financed by the European Union from the Cohesion Fund under the Infrastructure and Environment Operational Program.
