Recently, the Lai Rong high-speed railway was reported to have cut corners during the construction process, which has aroused widespread attention and discussion. For such a major project, quality and safety are paramount. In order to clarify the facts, the State Railway Administration and Shandong Province jointly set up a high-level investigation team to conduct on-the-spot investigations and technical gatekeeping guidance for more than two months. In the end, the investigation team issued an investigation report and came to the following basic conclusions: Lai Rong high-speed railway did not cut corners and did not affect the safety of the project, but there were problems in design changes, construction management and project subcontracting.
1. There is no problem of cutting corners in Lai Rong high-speed railway
After the investigation team investigated the problem that the length of the threaded pile construction pile reflected by Sanjie Company did not meet the design standard, it was found that the thickness of the granite regolith and the undulation of the regolith interface in this section of the road changed greatly. According to the undulations of the bearing layer revealed by the results of infill geological exploration, the pile length of some threaded piles did not meet the design standards. However, the pile end of the threaded pile has entered a good bearing layer, and there is no cutting corners. In other words, although the pile length did not meet the design standards, the quality and safety of the threaded piles were not compromised.
Expansion: During the investigation, professionals went deep into the site and made detailed observations and measurements on the construction of threaded piles. They found that the geology of this section of the roadbed is complex and changeable, and the regolith thickness of the granite and the regolith interface are undulating. Therefore, in the construction process, there are certain difficulties in the requirements for pile length. Depending on the undulation of the granite bearing layer, the pile length of the threaded pile sometimes cannot fully meet the design standard, but it can still stably withstand the operating load of the vehicle. Therefore, the investigation team concluded that the actual situation of the threaded piles was consistent with the results of the infill geological survey, and there was no case of cutting corners.
2. The safety of the project has not been affected
Some are concerned that threaded pile lengths that do not meet design standards may affect the safety and quality of the project. However, according to the investigation results of the investigation team, the stability and post-construction settlement of the road section meet the requirements of the relevant railway codes, and there is no composite foundation quality problem or potential safety hazard. In addition, the Lairong high-speed railway has undergone a number of acceptances such as continuous dynamic testing of the whole line linkage, which meets the safety and stability requirements of high-speed train operation, and the track smoothness also meets the requirements.
Expansion: In order to ensure the safety and quality of the Lai Rong high-speed railway, during the construction of the project, the supervision unit, the construction unit and the design unit held several meetings to discuss solutions. After the technical guidance of experts, they ensured the stability and safety of the project. In addition, the Lairong high-speed railway has also carried out continuous dynamic testing of the whole line linkage, which verifies its stability and safety at a high speed of 350kmh. These scientific testing methods and strict acceptance standards provide strong support for the safe operation of high-speed rail.
3. There are problems in the project, such as design change, construction management and project subcontracting
The results of the investigation show that there are some problems in the construction process of the Lai Rong high-speed railway, such as design changes, construction management and project subcontracting. Especially in the case that the pile length cannot meet the standard in some road sections, the construction unit did not make design changes, but continued the construction after the communication between the supervision unit, the construction unit and the design unit. This practice does not meet the requirements of the code and can lead to unstable construction quality.
Expansion: Design changes are common in large-scale engineering construction, especially when encountering special geological conditions. If the pile length cannot meet the design standard during the construction process, the design change should be made in time to ensure the quality and safety of the project. However, during the construction of the Lai Rong high-speed railway, the design change procedure was not standardized, resulting in the pile length of some sections not meeting the design standards. The existence of this problem has a certain impact on the quality and stability of the project, and needs to attract the attention of relevant departments and construction parties.
After the results of the investigation, some netizens questioned the credibility of the investigation report. However, this investigation was jointly initiated by the State Railway Administration and Shandong Province, and the investigation team is highly professional and authoritative. The investigation involved a large number of people and the need to go through multiple arguments, basically ruling out the possibility of human manipulation. Therefore, the results of this survey have a high degree of credibility and prove that the construction party did not cut corners in the Lai Rong high-speed rail project.
In addition, for the questions of netizens, we need to make one thing clear: the special circumstances in the construction of the project are not the same as cutting corners. In the production process of the pile length of the Lairong high-speed railway project, the construction party carried out the construction in accordance with the design requirements, but when encountering special geological conditions, the pile length could not fully meet the design standards, and measures such as truncation were taken. However, this does not mean that the construction party cut corners, because the materials used throughout the project still meet the design requirements and meet the safety indicators. This situation is common in engineering construction, and it is not illegal or unqualified.
To sum up, although there are some problems in the construction process of the Lai Rong high-speed railway, the survey results show that there are no corners and safety hazards. The construction quality and safety of the high-speed rail project are still guaranteed. At the same time, the high-level investigation and multi-party argumentation of the investigation team also ensured the credibility of the investigation results. Finally, we need to give full trust to the builders of the Lai Rong high-speed railway, the State Railway Administration, and Shandong Province to continue to ensure the quality and safety of the project.