In the construction of deep foundation pits of municipal engineering, it is crucial to strengthen support to ensure the stability of the foundation pit. Steel sheet pile shoring plays an important role in engineering construction due to its strong technical role. This article discusses how to apply steel sheet pile shoring in the construction of deep foundation pits of municipal engineering. First, by analyzing the significance of the application of steel sheet pile shoring in the construction of deep foundation pits of municipal engineering, practical and feasible application measures are proposed, in order to fundamentally improve the quality and stability of deep foundation pits of municipal engineering, and form a strong and effective technical reference for other similar projects.
In some municipal engineering projects, the diameter of the drainage pipe is relatively large, which puts higher requirements on the excavation, and the excavation depth also increases accordingly. If the traditional pile foundation reinforcement method is used, when gradually reaching the deep area, the pressure of the soil will easily form a destructive force on the pile foundation, while the steel sheet pile shoring can make up for this technical defect. This is because the bearing capacity coefficient of its own structure is very high, which can not only play a strong reinforcement role, but also improve the stability of the base.
Municipal engineering construction projects are usually carried out around roads that have been officially opened. In the base support operation, based on the energy efficiency of steel sheet pile technology, the stability of the base can be improved, the safety of the base can be improved, and the adverse effects on the surrounding roads during construction can be reduced. If the deep foundation pit construction of the municipal engineering project is on the main road, it is even more necessary to control the construction technology, promote the construction project in an orderly manner, and complete the construction project as soon as possible on the basis of ensuring quality and quantity.
The application of steel sheet pile shoring structure has a faster construction progress and the construction quality can also meet the standard requirements. This is also the advantage of this support structure. Moreover, the cost of applying steel sheet pile shoring technology is not high, which is more in line with the economic and time-effectiveness requirements of the project. Steel sheet pile shoring is the focus of deep foundation pit construction in municipal engineering. It plays a positive and effective role, which can reduce the probability of safety accidents, avoid the sliding of surrounding soil, and reduce the adverse impact on surrounding roads and the environment.
Generally speaking, survey and pile position layout usually need to be completed in the early stage of construction. Professionals are responsible for the survey and measurement work. The reference during this period is the construction design drawings. In the actual construction stage, the location involved in the excavation operation should be marked, and the layout of the pipeline and the centerline position of the pile foundation construction should be clarified. It can be said that survey and measurement is a detailed work to grasp the actual situation of the construction site. In the actual survey and layout, as long as adverse factors are found, it is necessary to communicate and discuss with technical personnel, optimize the determined deep foundation pit steel sheet pile shoring plan, and promote the orderly progress of construction work.
In the trenching and piling stage, it is necessary to carry out trenching and piling operations in a planned manner according to the pile position layout parameters obtained from the construction site survey. Small excavators can be used to flexibly carry out excavation operations, and the on-site management personnel will dynamically monitor the depth and width indicators of the trenching to ensure that these two indicators are always in the standard range to prevent backfilling problems caused by excessive construction tasks.
In general, the steel sheet piles should be kept at a reasonable distance from each other, which is convenient for controlling the quality and effect of support, and can lay a solid environmental foundation for the orderly advancement of construction work. During the excavation operation, a suitable operation surface can be created based on the effective interval distance. The vertical angle control in the steel sheet pile driving is very important. Once the angle tilt occurs in the piling process, the support capacity of the steel sheet pile will be weakened. Therefore, the goals and key points of on-site quality supervision in trenching and piling operations should be clarified. If there are hard stones in the base layer during piling, the piling operation should be stopped, and the piling should be cleaned before continuing. In the piling operation, hydraulic equipment can be used to provide full pressure for the steel sheet piles, so that the pile body can enter the base layer. Because there are many variable factors in the base layer itself, based on this, in the pile foundation piling operation, it is necessary to ensure the compliance of the piling speed to prevent damage to the steel sheet piles and angle tilt problems.
In the construction of steel sheet pile shoring structure for deep foundation pit of municipal engineering, each construction link needs to be carried out continuously. After completing foundation measurement, layout and excavation and piling work, the foundation pit excavation stage is entered. According to the different depths of excavation, corresponding support welding construction should be carried out. During the construction of the project, two different depth steps are set to ensure quality and safety. First, when the excavation construction reaches a depth of 1.5m, the steel plate material of the two-way support is welded for the project to form the first level of support structure surface. Then enter the second stage of excavation engineering. The counting method used in the excavation process is the same. After reaching the expected depth, two supports need to be welded. Professional personnel provide on-site professional guidance according to different excavation steps. When the early working surface landslides or other support structure instability occurs during the excavation process, the excavation construction needs to be stopped in time and the current problems need to be solved.
After the above construction tasks are completed, the support structure welding is carried out at 1.5m above the ground in the deep foundation pit. The support welding work needs to be carried out horizontally first. After completing the horizontal link, it will proceed to the vertical welding. After completing the two tasks, the horizontal overall structure support welding will be carried out. The horizontal structure plays an important role in the load-bearing system. It is necessary to use a circular steel pipe with a diameter of 18 cm and use steel plates to strengthen both ends of the steel pipe.
After the support welding is completed, professional technicians need to enter the site to check whether there is a problem of material deformation in the welded structure system. Once material deformation occurs, the excavation construction needs to be stopped in time and the existing support system needs to be adjusted. Ensure that the support system can play a load-bearing role in the overall construction and achieve the expected safety effect. Only in this way can the subsequent construction tasks be carried out. Support welding is the basic part of the formation of the steel sheet pile shoring structure, and it is also related to the prerequisite standard for the subsequent construction tasks. Any safety hazards in the welding structure will affect the overall safety of the project. Therefore, the project has undergone a secondary quality inspection to ensure safety before subsequent construction.
It is the last step in the construction of the steel sheet pile shoring structure for deep foundation pits of municipal engineering. Before pulling out the piles, the temporary support system needs to be dismantled. Concrete materials are used for reinforcement in the deep foundation pit support of this project. After the concrete material construction is completed, the deep foundation pit is buried by backfilling technology. Therefore, the temporary support structure laid is dismantled in a certain order, and the support is also dismantled in the vertical and horizontal order. The concrete construction structure is left in the base layer, and the drainage pipeline route in the base layer has been completed.
After the support system is dismantled, the pile pulling treatment of the steel sheet pile shoring structure is realized. After the dismantling work is completed, the backfilling stage is immediately entered until the deep foundation pit is completely backfilled and firm. In the application of the above technical steps, the project fully considers the environmental characteristics and technical conditions of the construction site, and selects a high-quality and efficient support system construction mode, thereby effectively promoting the safe development of municipal engineering construction tasks.
3. Conclusion
In summary, the feasibility of applying steel sheet pile shoring technology in the deep foundation pit construction of municipal engineering is strong, and the actual effect is ancestor. The reason why steel sheet pile structure is widely used is that it occupies a small area during construction, has strong flexibility, can achieve high standards of support stability, and has controllable construction quality. Whether in the early or late stages of deep foundation pit construction in municipal engineering, the role played by steel sheet pile shoring cannot be underestimated. It is precisely because steel sheet pile shoring has strong construction advantages that it is suitable for promotional use in foundation pit support projects, truly improving the overall quality of municipal engineering.
1.The significance of the application of steel sheet pile shoring in deep foundation pits
(1) Preventing landslides of foundation pit walls
The application of steel sheet pile shoring technology in the construction of deep foundation pits of municipal engineering can improve the soft properties of the soil layer in the base layer, improve the stability coefficient of the soil wall around the deep foundation pit, and highlight the energy efficiency of reinforcement. The pile foundation can penetrate deeper into a wider range in the base layer. Based on the soft foundation soil, the pile foundation can eliminate the gaps between the soil to a certain extent, forming a strong reinforcement effect, reducing or even directly avoiding the problem of surrounding soil sliding.In some municipal engineering projects, the diameter of the drainage pipe is relatively large, which puts higher requirements on the excavation, and the excavation depth also increases accordingly. If the traditional pile foundation reinforcement method is used, when gradually reaching the deep area, the pressure of the soil will easily form a destructive force on the pile foundation, while the steel sheet pile shoring can make up for this technical defect. This is because the bearing capacity coefficient of its own structure is very high, which can not only play a strong reinforcement role, but also improve the stability of the base.
(2) Reduce the impact of construction on roads
Municipal engineering construction projects are usually carried out around roads that have been officially opened. In the base support operation, based on the energy efficiency of steel sheet pile technology, the stability of the base can be improved, the safety of the base can be improved, and the adverse effects on the surrounding roads during construction can be reduced. If the deep foundation pit construction of the municipal engineering project is on the main road, it is even more necessary to control the construction technology, promote the construction project in an orderly manner, and complete the construction project as soon as possible on the basis of ensuring quality and quantity.The application of steel sheet pile shoring structure has a faster construction progress and the construction quality can also meet the standard requirements. This is also the advantage of this support structure. Moreover, the cost of applying steel sheet pile shoring technology is not high, which is more in line with the economic and time-effectiveness requirements of the project. Steel sheet pile shoring is the focus of deep foundation pit construction in municipal engineering. It plays a positive and effective role, which can reduce the probability of safety accidents, avoid the sliding of surrounding soil, and reduce the adverse impact on surrounding roads and the environment.
2. Application measures in deep foundation pit steel sheet pile shoring engineering
(1) On-site survey and pile position layout
When the steel sheet pile shoring structure of deep foundation pit is under construction, it is necessary to first conduct in-depth survey work on the construction site, clearly understand the specific location of pile driving, and carry out on-site pile position layout work. In order to improve the reliability of on-site survey, modern survey instruments can be used to conduct another survey and inspection on the data information obtained after the survey work is completed to ensure that the pile position is consistent with the construction design plan.Generally speaking, survey and pile position layout usually need to be completed in the early stage of construction. Professionals are responsible for the survey and measurement work. The reference during this period is the construction design drawings. In the actual construction stage, the location involved in the excavation operation should be marked, and the layout of the pipeline and the centerline position of the pile foundation construction should be clarified. It can be said that survey and measurement is a detailed work to grasp the actual situation of the construction site. In the actual survey and layout, as long as adverse factors are found, it is necessary to communicate and discuss with technical personnel, optimize the determined deep foundation pit steel sheet pile shoring plan, and promote the orderly progress of construction work.
(2) Trenching and piling
In the trenching and piling stage, it is necessary to carry out trenching and piling operations in a planned manner according to the pile position layout parameters obtained from the construction site survey. Small excavators can be used to flexibly carry out excavation operations, and the on-site management personnel will dynamically monitor the depth and width indicators of the trenching to ensure that these two indicators are always in the standard range to prevent backfilling problems caused by excessive construction tasks.In general, the steel sheet piles should be kept at a reasonable distance from each other, which is convenient for controlling the quality and effect of support, and can lay a solid environmental foundation for the orderly advancement of construction work. During the excavation operation, a suitable operation surface can be created based on the effective interval distance. The vertical angle control in the steel sheet pile driving is very important. Once the angle tilt occurs in the piling process, the support capacity of the steel sheet pile will be weakened. Therefore, the goals and key points of on-site quality supervision in trenching and piling operations should be clarified. If there are hard stones in the base layer during piling, the piling operation should be stopped, and the piling should be cleaned before continuing. In the piling operation, hydraulic equipment can be used to provide full pressure for the steel sheet piles, so that the pile body can enter the base layer. Because there are many variable factors in the base layer itself, based on this, in the pile foundation piling operation, it is necessary to ensure the compliance of the piling speed to prevent damage to the steel sheet piles and angle tilt problems.
(3) Excavation of foundation pit
In the construction of steel sheet pile shoring structure for deep foundation pit of municipal engineering, each construction link needs to be carried out continuously. After completing foundation measurement, layout and excavation and piling work, the foundation pit excavation stage is entered. According to the different depths of excavation, corresponding support welding construction should be carried out. During the construction of the project, two different depth steps are set to ensure quality and safety. First, when the excavation construction reaches a depth of 1.5m, the steel plate material of the two-way support is welded for the project to form the first level of support structure surface. Then enter the second stage of excavation engineering. The counting method used in the excavation process is the same. After reaching the expected depth, two supports need to be welded. Professional personnel provide on-site professional guidance according to different excavation steps. When the early working surface landslides or other support structure instability occurs during the excavation process, the excavation construction needs to be stopped in time and the current problems need to be solved.
(4) Support welding
After the above construction tasks are completed, the support structure welding is carried out at 1.5m above the ground in the deep foundation pit. The support welding work needs to be carried out horizontally first. After completing the horizontal link, it will proceed to the vertical welding. After completing the two tasks, the horizontal overall structure support welding will be carried out. The horizontal structure plays an important role in the load-bearing system. It is necessary to use a circular steel pipe with a diameter of 18 cm and use steel plates to strengthen both ends of the steel pipe.After the support welding is completed, professional technicians need to enter the site to check whether there is a problem of material deformation in the welded structure system. Once material deformation occurs, the excavation construction needs to be stopped in time and the existing support system needs to be adjusted. Ensure that the support system can play a load-bearing role in the overall construction and achieve the expected safety effect. Only in this way can the subsequent construction tasks be carried out. Support welding is the basic part of the formation of the steel sheet pile shoring structure, and it is also related to the prerequisite standard for the subsequent construction tasks. Any safety hazards in the welding structure will affect the overall safety of the project. Therefore, the project has undergone a secondary quality inspection to ensure safety before subsequent construction.
(5) Pile extraction Pile extraction
It is the last step in the construction of the steel sheet pile shoring structure for deep foundation pits of municipal engineering. Before pulling out the piles, the temporary support system needs to be dismantled. Concrete materials are used for reinforcement in the deep foundation pit support of this project. After the concrete material construction is completed, the deep foundation pit is buried by backfilling technology. Therefore, the temporary support structure laid is dismantled in a certain order, and the support is also dismantled in the vertical and horizontal order. The concrete construction structure is left in the base layer, and the drainage pipeline route in the base layer has been completed.After the support system is dismantled, the pile pulling treatment of the steel sheet pile shoring structure is realized. After the dismantling work is completed, the backfilling stage is immediately entered until the deep foundation pit is completely backfilled and firm. In the application of the above technical steps, the project fully considers the environmental characteristics and technical conditions of the construction site, and selects a high-quality and efficient support system construction mode, thereby effectively promoting the safe development of municipal engineering construction tasks.
3. Conclusion
In summary, the feasibility of applying steel sheet pile shoring technology in the deep foundation pit construction of municipal engineering is strong, and the actual effect is ancestor. The reason why steel sheet pile structure is widely used is that it occupies a small area during construction, has strong flexibility, can achieve high standards of support stability, and has controllable construction quality. Whether in the early or late stages of deep foundation pit construction in municipal engineering, the role played by steel sheet pile shoring cannot be underestimated. It is precisely because steel sheet pile shoring has strong construction advantages that it is suitable for promotional use in foundation pit support projects, truly improving the overall quality of municipal engineering.
