Arriving at our exercise site are from:
**City Safety Supervision Bureau Chief Engineer, Comrade xx
**City Transportation Bureau, Deputy Director, Comrade xx
**City Construction and Development Corporation, Vice Chairman, xxx, General Manager, xxx, Deputy General Manager, xx , xx and the leadership of each section (office).
Arrived at the scene also participated in the construction of the ** expansion project director's office, the construction unit of the project manager, safety minister and involved in the tunnel operation of the head of the work area, the head of the work team, as well as the geological prediction of the unit in charge, etc., here we are involved in the project all the builders and the attention and support given to the relevant units to express our loyal thanks.
Next we invite:
Comrade xxx town government to speak
Comrade Duan minister of the armed forces department of the xxx government to speak
Comrade xx, deputy director of the ** Municipal Bureau of Safety Supervision, to speak
** Municipal Construction and Development Company leader xx to speak
Thank you for all the leaders and guests, and we invite ** Municipal Construction and Development Company general manager xxx to announce the start of the drill. Company's general manager xxx to announce the start of the exercise.
Please participate in the observation of the guests quickly to the observation area.
What we see below is the scene of production:
The ** same section of the Shipai Mountain Tunnel right hole is carrying out intense support operations in the tunnel, the tunnel existing construction workers 12. The safety administrator on site is conducting safety inspections.
**Expressway Expansion Project** section starting point (K245+700) is located in **** County Qingkou Town, along the way, the main control points are Qingkou Interchange, Foundation **Tunnel, Youshu Special Bridge, Acacia Ridge Tunnel, Taicheng Ridge Bridge, **Interchange, Fishing Creek Interchange, Shipai Mountain Tunnel, **Bridge, the end of the piling for the K300 +455, and **section starting point, the total length of about 55.245 kilometers.
Shipai Mountain Tunnel is a separated tunnel, which is constructed by China Railway 16 Bureau. The right tunnel is 785.0m long, and the left tunnel is 790m long, which is a center tunnel. The left and right lines of the tunnel inlet and outlet are used to cut bamboo type portal, set up between the left and right lines of a pedestrian cross-hole, hole and pedestrian cross-hole road surface are used in the form of concrete pavement.
Shipai Mountain Tunnel left and right line inlet and outlet are used to cut bamboo type portal, the portal set a certain length of the open hole, the open hole on the use of soil and stone mixed fill, backfill surface planting of grass and landscaping. Cave side slope using shotcrete, anchor rods, reinforcing steel mesh protection.
Shipai Mountain Tunnel was officially opened on March 6, 2009, excavation from the direction of the exit to the inlet digging, the use of the hole to strengthen the section and Ⅳ level of perimeter rock on the section of the excavation, and then under the trench construction to the palm surface, and then the full section of the excavation of the construction method, and now for the full section of the excavation. At present, the left hole has been constructed 280m, the right hole has been constructed 115m, and the construction of the second lining is being prepared.
A loud bang occurred on the site.
After the loud bang, the cave was dark, safety inspectors quickly ran to the tunnel entrance, the tunnel entrance has nearly 1,2,...... nearly ten people ran out of the cave. All of the personnel out of the cave ran to the duty room to pick up their own work license. On-site supervisors urgently attend the scene disposal.
Now you hear is the sound of ventilation equipment, strengthen ventilation is to ensure that the hole must be fresh air, to protect the physical health of the operating personnel and configuration, at the same time, the site personnel to open the temporary power equipment, to ensure that the hole lighting.
At the scene supervisors, safety management personnel are working with the work shift manager for the number of people counting, to determine the list of people not out of the tunnel. After confirmation, the safety management personnel reported to the project manager, the project manager clear instructions, requiring the site personnel to quickly start the emergency rescue plan.
After receiving the order, the foreman of the work shift quickly organized the personnel to the emergency warehouse to take out the rescue equipment for self-rescue. And enter the tunnel again.
The project manager rushed to the scene, to the site supervisors and safety personnel to understand the situation in the determination, to ** Expansion Company report.
Everyone is now seeing the construction unit to start the plan to implement self-rescue, successfully rescued a trapped person Everyone is now seeing the construction unit to start the plan to implement self-rescue, successfully rescued a trapped person
The site commander-in-chief, Comrade XXX, received the report and announced: "Immediately start the company's emergency rescue plan, immediately notify the emergency rescue personnel rushed to the site command."
The site deputy commander-in-chief (director office director xxx) rushed to the scene, notified: (1) everyone, please note that the right hole of the Shipai Mountain Tunnel collapsed, please quickly stop the construction workers to evacuate the construction area; (2) please quickly rush to the scene of the emergency response team; (3) please site order maintenance personnel to implement order control.
On-site rescue group, monitoring group, site maintenance group, medical rescue group and news investigation group respectively into the field to the site commander-in-chief reported in place:
So far, in accordance with the preparation of the emergency plan, on-site emergency response team has been all to the scene
Shipai Mountain Tunnel is in the Cambrian and Ordovician tuff distribution area, due to the development of dissolution holes in this area, caves and grooves, such as bad geological The body is prevalent. At the same time, the ancient crustal movement makes the region with many faults and joints, and there are a large number of fracture and broken zones during the tunnel construction, and geologic disasters such as caverns, water surges, mud surges, and tunnel collapses may occur at any time. The purpose of third-party forecasting and monitoring is to comprehensively adopt all kinds of international advanced geophysical exploration means and geological means to determine the nature, scale and orientation of the adverse geology in front of the palm face of the whole tunnel, to provide a scientific basis for avoiding the construction risk, and through monitoring and measuring, to understand the dynamic changes of the surrounding rock and supporting structure in time, to prevent the destruction of the supporting structure and the occurrence of accidents, so as to guide the construction and give feedback to the design.
In order to ensure that the construction of the project is carried out in a timely manner, it is necessary to monitor the measurement.
In order to ensure the safety, high quality and high efficiency of the tunnel construction, **Expansion Company signed a construction contract with the Institute of Geotechnical Mechanics of the Chinese Academy of Sciences **to carry out the over-forecasting and monitoring of the geological conditions of all the tunnels, and they set up the **Expansion Project Tunnel Over-forecasting and Monitoring Project Department in Panjiawan, which has eight members, including one senior engineer and seven engineers.
During the implementation of this project, this project department strictly follows the contract agreement, national norms and the requirements of the owner, and adopts the international advanced tunnel seismic prediction system TSP, GSSI geo-radar, Leica precision level meter and other advanced instruments to carry out the work of over-advance geologic forecasting and monitoring and measuring. From the revealed situation, the accuracy rate of forecasting adverse geological bodies (especially caverns) in front of the palm face reaches 100%, which achieves the purpose of over-advance forecasting and monitoring and measuring. Forecasting and monitoring project department will make persistent efforts, under the leadership of **Expansion Company and Superintendent's Office, and with the cooperation of all construction units, through solid and meticulous work, continue to escort the construction safety of Luyu Highway Tunnel.
What you see now is: the geological monitoring group has begun the rescue, rescuers have set up the monitoring instruments, and arranged for engineers with practical experience to enter the tunnel for initial exploration.
At present, the geological detection team into the tunnel personnel have come out, is and monitoring team leader for instrument detection results and site investigation results of the comprehensive analysis.
All the rescue personnel and equipment quickly into the rescue.
China Railway Sixteen Bureau Group Co., Ltd. won the bidding of the ** with the section, in order to high quality, high efficiency in the contract period to complete the construction task, the group company set up a comrade xxx for the project manager, comrade xxx for the chief engineer of China Railway Sixteen Bureau Group Co., Ltd. alteration project ** with the section of the project manager, at the same time, organizing the high quality, good performance, specialization of construction teams to undertake the construction of the section The main project Shipai Mountain Tunnel construction. The project department has a staff of 10 people, including 2 senior engineers, 4 engineers, 4 technicians.
**The same section of the line is 15,234 meters long, the line's main structure for the separation of a tunnel, culvert 19, large **2, roadbed earth and stone 1.2 million cubic meters, of which the controlling project Shipai Mountain Tunnel, the right line is 785 meters long, the left line is 790 meters long, since March 6 into the hole since the left cave excavation and support of 280 meters, the right cave excavation and support of 170 meters, the current major construction focus is on the left line of the uplift arch. The main construction focus is the left line of the arch and the second lining.
Since the project department entered the field, it has always inherited and carried forward the glorious tradition and excellent style of special hardship, special fighting and special dedication, adhering to the optimization of the quality of the 16th Bureau of China Railway, strengthening safety, landscaping, and the pursuit of a better. Corporate philosophy, in the ** Municipal Party Committee, the municipal government, ** Expansion Corporation, the Superintendent's Office, xxx township government and other leaders at all levels of care and guidance, standard management, fine construction, and brother units work hand in hand, to ensure that the construction progress, safety and quality.
The tunnel collapse is mainly due to geological factors and human factors,
⒈ geological factors
(1) the tunnel passes through the faults and their fracture zones, once excavated, the potential stress release, into the pressure fast, the surrounding rock instability and collapse.
(2) When passing through a variety of accumulators, due to the loose structure, no cementation between the particles or poor cementation, caused by the collapse after excavation.
(3) In the crushed structure stratum such as extrusion crushing zone, rock vein interspersed zone, and dense joints. The rock masses are squeezed and clamped each other, and once excavated, they are destabilized, and the surrounding rocks commonly fall off and collapse. In the case of the development of weak structural surface, or mud filling material is too much, are prone to produce a large collapse.
(4) thin layer of rock in the tectonic movement under the action of the formation of small folds, misalignment of the development of the section, the construction of the slump often occurs.
(5) rock layer soft and hard or have soft and weak interlayer ground rock body, in the role of groundwater, soft reluctance to greatly reduce the strength of the ground, and thus the occurrence of landslides.
(6) Groundwater softening, soaking, erosion, dissolution and other effects exacerbate the destabilization and collapse of the rock body.
2, human factors:
(1) improper choice of construction methods, or process spacing arrangement is unreasonable. The spacing of each process is drawn long, the strata exposure time is too long, causing the peripheral rock loosening, weathering, incurring the occurrence of landslides;
(2) spray anchors are not in time, or the quality of the concrete, the thickness does not meet the requirements;
(3) the use of steel support, the support erection quality is poor, the support and the surrounding rock is not close to the two gaps are not filled with solid, or not strong enough to link, not to meet the pressure lock of the surrounding rock needs to be The strength requirements of the surrounding rock pressure lock can not be met.
(4) sometimes pumping support operation is not appropriate, or when the support has appeared to be overstressed phenomenon and not in time to strengthen;
(5) blasting operations are not appropriate, the amount of drugs is too much;
(6) dealing with dangerous rock measures are not appropriate, causing the dangerous rock fall, pulling the collapse of the rock layer
Rescue process, found that the casualty, the 120 medical care team has arrived at the scene.
The ambulance waited outside the cordoned area;
two paramedics have taken the stretcher into the tunnel mouth waiting.
News investigators are working with the foreman, supervisors, safety officers to understand the cause of the accident and injuries
Measures to deal with the collapsed party
(1) If the collapsed party is small in size, and the collapsed party has been sprayed within the scope of the spraying of anchors, or has been set up a more solid component support, can be from the two ends or one end of the first up and then down to gradually remove the collapsed slag, along with digging along with the spray concrete, along with the temporary component support to support the roof, and then the temporary component support to support the roof. Set up temporary components to support the top;
(2) such as the collapse of a larger volume, or the surface has been sinking, or due to the collapse of the body blockage, can not enter the collapse range of support, it can be grouted to strengthen the slump, and then use the "through" approach in the slump body excavation, lining;
(3) dealing with the collapsed party should be strengthened at the same time the water drainage, that is, "the collapse of the first water treatment".
We see that the last worker in the hole was rescued, in the medical personnel to carry the ambulance, sent to the hospital for further examination and treatment. (Ambulance drive away)
At the same time, the rescue group reported the cave situation and rescue completed, news gathering and adjusting group informed of the situation to be announced to the public; geological monitoring group to report again on the geological monitoring situation: the cave geological situation is basically stable, no sign of further collapse, () and continue to carry out monitoring.
The field commander-in-chief, comrade xxx, after confirming the situation reported by the groups, reported to the commander-in-chief xxx: "Report to the commander-in-chief, the hole is trapped 1 person, has been successfully rescued and sent to the hospital for treatment, at present no life-threatening situation, the scene of the rescue work has been completed!"
The commander-in-chief (** general manager of the expansion company xxx) announced: "This drill is successful, lift the alert, the personnel collection."
Please observe the personnel to the cordon area to gather.
Emergency drills are an important part of our primary highway safety management, and we still have a long way to go to keep the safety posture of the two primary highways stable. To this end, we should always put the safety work in a very important position, actively summarize the emergency drill, with no slack, highly vigilant spirit, in-depth implementation of the laws and regulations of production safety and safety management guidelines, seriously and solidly do a good job in the safety management of the two first-class highway, to ensure that the two first-class highway construction during the safety of the production of the zero-accident established goals.
The leadership of the Municipal Bureau of Transportation to carry out the review of the exercise.
Thank you for the strong support of the Municipal Safety Supervision Bureau, Bureau of Transportation, Panjiawan Township Government, thank the Office of the Superintendent, the same section of the project department of the **, Geological Advance Forecasting Project Department and other units of the great assistance, thank the people along the ** Expansion Project for our strong support and cooperation. **Expansion Company emergency drill site meeting ended successfully. Thank you all!