What does SDDC pile mean? 5

SDDC pile is a deep super rammed pile in the hole.

The deep strong compaction pile method in the hole, referred to as DDC technology, is a foundation reinforcement technology developed on the basis of strong compaction technology, and is a foundation treatment technology integrating modern science and technology according to the mechanism of "dynamic consolidation". The difference between the deep strong compaction pile method in the hole and other technologies is that: the strong compaction is introduced into the depth of the foundation through the hole, and the filler in the hole is layered from bottom to top with a special-shaped heavy hammer to carry out the operation of the deep strong compaction pile method in the hole with high kinetic energy, overpressure and strong compaction, so that the filler in the hole is compacted and consolidated along the vertical deep depth while carrying out horizontal strong compaction reinforcement on the soil around the pile, and different processes are adopted for different soil qualities, so that the pile body obtains a bead-shaped, enlarged head and pallet-shaped, which is conducive to the close occlusion of the pile and the soil between the piles. Increase the frictional resistance between each other.

After DDC treatment, the overall stiffness of the foundation is uniform, and the bearing capacity can be increased by 2 to 9 times. The deformation modulus is high, the settlement deformation is small, it is not affected by groundwater, and the depth of foundation treatment can reach more than 30 meters.

Its construction is to first form a hole, and then fill the hole, with high kinetic energy, overpressure specific hammer in the deep field of the hole for punching and extrusion, so that the filler is extruded to the periphery and bottom of the hole under strong push. The high-compaction hammer operation is completed from the bottom up in the hole. The ramming energy can reach 20,000 kN m m2.

Depths can be up to 30m or deeper. The foundation treated by DDC technology can achieve no collapsibility, no liquefaction, low compression deformation, high bearing capacity and uniform stiffness. It can consume a large amount of construction and industrial waste, and use various inorganic solid wastes for foundation reinforcement treatment, reduce environmental pollution, and turn waste into treasure.

This technology has been applied in dozens of foundation treatment projects, eliminating the collapsibility of deep loess foundation, greatly improving the bearing capacity of the foundation, reducing the compressibility of the foundation, and the effect of foundation treatment is remarkable.

SDDC pile is: deep strong compaction pile method in the hole, referred to as DDC (Ruilitong patent) technology, which is a foundation reinforcement technology developed on the basis of strong compaction technology, and is a foundation treatment technology integrating modern science and technology according to the mechanism of "dynamic consolidation".

The production process of electricity is extremely complex, with multiple processes such as power generation, transmission, distribution, and consumption. Among them, power generation refers to the place where electric energy is produced, such as: thermal power units, hydropower units, etc.; Transmission refers to the operation of using high-voltage lines to complete power transmission; Substation refers to the use of high-voltage substation to convert high-voltage voltage, ultra-high-voltage voltage and other electrical energy into low-voltage electrical energy; Distribution is the final step, which reduces the voltage and delivers the electricity to the consumer.

The power transmission and transformation project of the power system attaches importance to the two steps of transmission and transformation. With the rapid increase in China's electricity demand, there is an urgent need for power system transmission and transformation projects to undertake the transmission and transmission of the power system. A number of power transmission and transformation projects together constitute the main frame of China's power grid.

At this stage, there are many electric rock pressure grades such as 110kv, 220kv, 330kv, 500kv in China's power transmission and transformation projects, of which 220kv is used more frequently in China; 330kV is commonly found in China's northwest power grid; The 500kV level is the highest, and the requirements for cost, capacity, and process are higher and more advanced. At present, China attaches great importance to the construction of 500kV power grid, which is the backbone of China's power grid. Power transmission and transformation engineering is an important engineering project in the construction of the main grid of the power grid, including transmission line engineering and substation engineering, which requires high costs, extremely complex engineering construction, and high construction technical requirements.

Power transmission and transformation projects generally include electrical installation, rough and automation, civil engineering, electrical equipment commissioning, system start-up and commissioning, etc. Among them, electrical installation includes the installation of primary equipment such as high-voltage equipment, and also includes the wiring and installation of secondary equipment such as protection and control systems; Communication and automation refers to communication engineering and substation automation; Civil engineering covers equipment foundation, building engineering, four-way and one-level, frame foundation, etc.; The commissioning of electrical equipment is to test and adjust the installed primary equipment and secondary equipment; System start-up and commissioning refers to the start-up and commissioning of the operation of transmission lines and substations after the construction of power transmission and transformation projects. The status quo of power system power transmission and transformation project management does not pay attention to the coordination of the project scheduleThe power system power transmission and transformation project is very different from other projects, and the requirements of the power system power transmission and transformation project are higher, and the construction progress is required to be carried out in strict accordance with the requirements of the regulations, so as to ensure that the project construction is completed on time.

At this stage, most of China's power enterprises do not pay attention to the management and coordination of the progress of power transmission and transformation projects, which seriously affects the quality of the project, which not only reduces the ability of construction personnel and engineers to control the progress of the project, but also has a great impact on the efficiency and quality of the project. A small number of power transmission and transformation projects only pay attention to the progress of the project, and lack the supervision of the project quality, resulting in the problem of urban power shortage.

The Super Down Hole Dynamic Consolidation method (SDDC pile) is a pile with high bearing capacity formed by the SDDC method, which is filled with construction waste, miscellaneous soil, plain soil, stone, ash, non-toxic industrial waste and their mixtures.

SDDC is a construction technology that integrates the natural science law of "super kinetic energy" and the mechanism of dynamic consolidation with modern science and technology, which is basically similar to the treatment of strong compaction foundation. The uniqueness is that the strong compaction construction technology is cleverly combined with the compacted pile construction technology to make it one, which is hammered into the hole first, and then hammered into the filler in the hole, with high pressure and strong kinetic energy in the hole "from bottom to top", so that all kinds of inorganic solid materials are strongly extruded to the periphery and the lower part of the hole, so as to achieve the effect of squeezing the foundation. According to different geological conditions, the backfill can be selected with different pile materials such as plain soil, ballast soil, gravel, ash soil, triple soil, Peibu fly ash, cement and panicle soil with a particle size of less than 1110-5 hole diameter and organic matter content of no more than 10%.

This not only solves the problem for the treatment of all kinds of difficult foundations, but also makes the urban construction waste and waste ballast "turn waste into treasure", and at the same time, it has played a good economic and environmental protection effect on the green environmental protection of human society by saving steel and cement, reducing project costs, eliminating inorganic pollutants, and human society. It has the advantages of unique mechanism, wide range of materials, easy operation and easy to master.

The difference between the two is in the word "super".

The Super Down Hole Dynamic Consolidation method (SDDC pile) is a pile with high bearing capacity formed by the SDDC method, which is filled with construction waste, miscellaneous soil, plain soil, stone, ash, non-toxic industrial waste and their mixtures.

The Down Hole Dynamic Consolidation method (DDC for short) DDC pile is filled with construction waste, miscellaneous soil, plain soil, stone, ash, non-toxic industrial waste and their mixtures, etc., and the DDC method is used to form a pile with high bearing capacity.

According to the specific problem type, the steps are disassembled, the cause is analyzed, the content is expanded, etc.

360 Q&A. 360 Q&A [cited on 2017-12-20].

The foundation treatment technology of DDC piles such as comprehensive heavy hammer tamping, strong tamping, bored piles, reinforced concrete prefabricated piles, ash soil piles, gravel piles, double ash piles, etc., absorbs and discards their defects, sets high energy, high pressure, strong compaction, and the effects of strong compaction in the treatment of weak soil layers.

DDC pile-through, machine tool hole (drilling or punching), through-hole channel foundation treatment, filler in the deep part, high-energy special gravity rammer for punching, smashing, extrusion, high pressure, strong and strong compaction, tamping operations to achieve the reinforcement of the foundation, so that the bearing properties of the foundation are significantly improved, and the general foundation treatment technology has significant characteristics of building foundation treatment.

DDC pile features.

1. Wide range of application;

2. It has high energy, overpressure and strong compaction effect;

3. High bearing capacity, deformation modulus, compression deformation;

4. Deep processing depth;

5. The overall stiffness of the base treatment is uniform;

6. Low cost and materials;

7. The construction period is fast, and the construction is fully mechanized;

8. Construction pollution.

SDDC pile is a patented technology of Beijing Ruilitong company, which is an enhanced version of DDC pile technology, which has been optimized on the basis of the original use, so as to be more convenient and practical.

1.It is a green project to use ballast as raw material, turn ballast into treasure and eliminate pollution.

2.It can save a lot of steel, cement and construction funds.

3.It is widely used in difficult foundation treatment projects in many fields in various regions of China.

4.It can deal with all kinds of difficult foundations, and can also eliminate the re-pollution of pollutants to the human living environment.

1. Wide range of application;

2. It has the effect of high kinetic energy, overpressure and strong compacting;

3. High bearing capacity, large deformation modulus and small compression deformation;

4. Deep processing depth;

5. The overall stiffness of the foundation is uniform after treatment;

6. The cost is low, and local materials can be used;

7. The construction period is fast, and the construction is fully mechanized;

8. The construction pollution is small.

The difference with other technologies is that: the strong compaction is introduced into the depth of the foundation through the hole, and the filler in the hole is layered from bottom to top with a special-shaped heavy hammer to carry out the deep strong compaction pile method operation in the hole with high kinetic energy, overpressure and strong extrusion key, so that the filler in the hole is compacted and consolidated along the vertical deep compacting and consolidating at the same time to carry out horizontal strong compaction reinforcement on the soil around the pile, and different processes are adopted for different soil qualities, so that the pile body obtains a bead-shaped, enlarged head and pallet-shaped, which is conducive to the close occlusion of the pile and the soil between the piles. Increase the frictional resistance between each other. After DDC treatment, the overall stiffness of the foundation is uniform, and the bearing capacity can be increased by 2 to 9 times. The deformation modulus is high, the settlement is small and the deformation is small, it is not affected by groundwater, and the depth of foundation treatment can reach more than 30 meters.