On the morning of April 16, Deputy Minister of Transport Nguyen Danh Huy held an online meeting with the field working group and representatives of relevant units in Phu Yen and Khanh Hoa provinces to discuss a plan to overcome the landslide incident at Bai Gio railway tunnel, soon reopen the North-South railway line, and ensure absolute safety.
Deputy Minister of Transport Nguyen Danh Huy requested the establishment of a forward command team to deal with the incident at Bai Gio tunnel.
“Handling the Bai Gio tunnel incident must comply with the 4 on-site principles according to emergency situations and ensure 5 requirements: earliest route clearance; fastest mobilization of forces; most creative solutions; absolute safety for officers, engineers, and workers participating in the fix; units must concentrate the highest resources to work 24/7, striving to complete the fix before April 22 in accordance with the Prime Minister's direction,” Deputy Minister Nguyen Danh Huy emphasized.
Appreciating the efforts of units and localities to urgently support, promptly handle and overcome the landslide incident, Deputy Minister Nguyen Danh Huy said that immediately after the incident occurred, the Ministry of Transport directed forces and organizations to overcome it.
On the morning of April 13, the Ministry reported to the Prime Minister. The Prime Minister directed the Ministry of Transport to urgently mobilize maximum resources to promptly overcome the landslide incident of Bai Gio tunnel, striving to open the route as soon as possible.
The Ministry of Transport also sent a document requesting the Traffic Police Department, the police of Phu Yen and Khanh Hoa provinces and related units to be on duty at the scene 24/7 to promptly find solutions, aiming to quickly and drastically implement the Prime Minister's instructions.
Units are focusing their maximum resources on 24/7 construction, striving to complete troubleshooting before April 22.
Regarding the next plan and direction of handling, Deputy Minister Nguyen Danh Huy emphasized that the field working group and experts all agreed that Bai Gio tunnel has very complex geology, has been under construction for a long time, the structure has degraded and the landslide has been in the forecast of the State management agency since 2020. During the process of solidifying Bai Gio tunnel, the incident occurred and fortunately did not cause damage to people and construction assets.
Based on the proposal of the consultant and the field working group, the Ministry's leaders basically agreed with the proposed plan, but in order to complete the incident resolution as quickly as possible, the Deputy Minister requested to immediately establish a Forward Command Team headed by the Deputy General Director of Project Management Board 85, the project investor; direct the assurance of 24/7 safe construction, periodically hold daily meetings with the Working Group of the Ministry of Transport; establish a Working Group of the Ministry of Transport headed by Deputy Minister Nguyen Danh Huy, hold daily meetings, grasp the daily and hourly construction progress to provide timely instructions.
The main force to fix the Bai Gio tunnel incident is Song Da 10 Company, Construction Investment and Construction Joint Stock Company 3 and Phu Khanh Railway Joint Stock Company.
The forward command team clearly defined the responsibilities of each unit, divided the workload during the incident response construction process with 3 main units, namely Song Da 10 Company, Construction Investment and Construction Joint Stock Company 3, and Phu Khanh Railway Joint Stock Company.
Units mobilize machinery, equipment, materials, human resources and are responsible for ensuring all finances during the repair construction process. Project Management Board 85 mobilizes additional units to provide sufficient and timely materials during the repair construction process,...
According to Mr. Dang Sy Manh, Chairman of the Board of Members of Vietnam Railway Corporation, on average, the railway industry transports 10 trains per day.
By the evening of April 15, more than 13,000 passengers had been transported on 38 passenger trains from Tuy Hoa station (Phu Yen) to Gia station (Khanh Hoa) and vice versa; free meals and drinks were provided; passenger trains continued to operate according to the plan for which passenger tickets had been sold, combined with improving the quality of passenger transport organization.
Chairman of the Board of Members of Vietnam Railway Corporation Dang Sy Manh (white shirt standing in the middle) was present at the scene to direct and encourage the construction units.
Due to the incident, 77 freight trains were blocked. The railway had to negotiate with the shipper to transfer the goods, and has so far transferred 16 trains through the incident area, prioritizing fresh, frozen and express goods.
" This is an incident beyond our ability and control, so the damage to railway transport is very large. The Corporation recommends that all levels consider funding sources and, to minimize damage, request that localities arrange transport vehicles to ensure the quantity and conditions for passenger service; recommend that competent authorities exempt road use fees for vehicles transporting passengers and goods through Deo Ca tunnel ...", Mr. Manh suggested.
Mr. Manh also recommended that after the Bai Gio tunnel incident is resolved, competent authorities should consider allocating capital for step 1 reinforcement for 12 weak tunnels on the route that need to be prioritized for treatment with an estimated cost of less than 500 billion VND and have a plan to treat 27 weak tunnels on the entire Thong Nhat railway line.
General Director of Vietnam Railway Corporation Hoang Gia Khanh (wearing a pith helmet on the far right) was present at the scene to direct the troubleshooting and encourage the construction units.
Reporting at the meeting, the representative of the on-site working group directly handling the landslide said that Bai Gio tunnel (tunnel No. 23) is a level II railway tunnel on the North-South railway line in Dong Bac village, Dai Lanh commune, Van Ninh district (Khanh Hoa), the route is at Km1230+991 - Km1231+385, nearly 394m long. The tunnel is being solidified, the capital source is from the medium-term public investment plan for the period 2016-2020.
On April 12, the contractor was ordered to block the tunnel from 9:32 a.m. to 1:32 p.m. for construction. At around 12:45 p.m., while demolishing the old concrete lining of the tunnel, due to weak ground conditions on the tunnel arch, a landslide occurred, with about 150 cubic meters of rock and soil falling. There were no casualties or damage to construction equipment, but train operations were interrupted.
Immediately after the incident, the investor, supervision consultant, and construction contractor coordinated with Vietnam Railway Corporation and related units to block off the Hao Son-Dai Lanh section, divert road traffic on the tunnel to handle the landslide.
By about 3:30 a.m. on April 13, authorities had basically removed all the landslide debris, preparing to place the type A support frame in the landslide location and spray concrete.
However, due to the complex geology above the tunnel lining (weathered rock), rocks continue to fall, not ensuring the safety of people and vehicles continuing to participate in the treatment. Weathered soil and rocks fall down, filling the cross-section of the tunnel. At present, large rocks have filled the hole in the tunnel dome with a volume of about 150m3. The geology above the tunnel is in the form of stacked rocks, intertwined with each other, creating large voids.
After installing all the support frames in place, the construction units will proceed to spray mortar and make concrete for the tunnel lining, striving to open the North-South railway line by April 22 at the latest.
During the night of April 13 and the morning of April 14, the relevant parties continued to survey and propose solutions, based on the principle of maintaining stability above and inside the tunnel for treatment. On April 15, the units reinforced the collapsed soil in the tunnel by spraying open-sided cement mortar, and placing anchors to create cells and hard bones.
On the top of the mountain, at the collapsed location, conduct geological exploration drilling, pump cement mortar into the collapsed soil to fill the gap, stabilize the rock mass on the top of the tunnel, and prevent further collapse.
After the collapse site was basically stabilized, on April 16, the units continued to prepare equipment to drill and insert anchors into the pit mouth and pump high-pressure grout to create stable adhesion, gradually excavate the collapsed rock mass in the tunnel, and install support frames as they dug.
After installing all the support frames in place, proceed with grouting and concrete lining the tunnel as per the approved design, striving to complete the treatment by April 22 at the latest to open the North-South train route.
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