Successful use of Deep dynamic consolidation (DDC pile Company) technology backfill

One, DDC DDC pile pile presentation (Deep dynamic consolidation technique) is Beijing Rui Stratton Foundation Engineering LLC's proprietary and patented technology, which has been used in hundreds of projects, planning needs are satisfied. DDC pile judged by the Beijing Municipal Construction Committee "vassal table founding technical level," the Ministry of Construction for the preparation of technical regulations and determine the DDC DDC Pile reach the world advanced level. DDC Pile in 2001, 2005, 2008 and 2011 the Ministry of Construction has been implemented as a national key technology. 52nd in the world in November 2003 in Belgium, the DDC technology conference organized by creating get to enjoy the world's highest award - the Gold Award, which is the only gold medal China Foundation disposal technology achieved so far in the world. DDC is summarized pile hammer compaction, strong compaction, gravel pile, pile foundation lime, double-gray piles, bored piles, precast reinforced concrete pile foundation disposal technologies on the absorption of its interests, to abandon its flaws, set high kinetic energy, high pressure, high compaction effect on each one, the end of the disposal of the foundation soil. After the DDC is a hierarchical bottom-right hole filler high kinetic energy, ultra-pressure, high compaction of Deep dynamic consolidation operations, making the filler hole vertically deep compaction consolidation together on the pile soil compaction strong lateral reinforcement, on different soil, DDC piles of piles of information need not apply, the choice of different construction methods, making piles made beaded, expand and tray-shaped head, help between piles and piles soil tight bite, increasing the frictional resistance between each other, the overall stiffness of the foundation disposal uniform, carrying capacity can increase 2-9 times. About backfill and other fragile foundations, DDC pile can use special equipment to carry out the information filled in the hole punch, smashing, pressure, split the special operation, the filler vertically along the deep compaction of soil between piles strong lateral squeeze dense pile of loose change with soil beaded beneficial soil between piles and piles tight bite, increasing the sidewall friction resistance, useful reinforcement of the soil between piles. Examples of composite foundation bearing capacity of the DDC has been done has been reached 800kPa; and ground deformation modulus is high, the settlement of small deformation, without affecting the groundwater, foundation disposal depth of up to tens of meters. A wide range of application, can be used to dispose of all types of ground; the ground disposal project, the Deep dynamic consolidation and other skills comparison, can be applied to a variety of ground clutter strata reinforcement disposal, has broad applicability. Uneven ground such as for large thickness of the loess, miscellaneous fill, liquefaction ground, all kinds of fragile soils, collapsible soil and an acid, alkali and salt corrosion of the foundation, has a hard sandwich, stone and scrap garbage backfill foundation and a variety of messy construction sites, such as the disposal of underground civil air defense fortifications. By drilling, punching and other powerful techniques into the hole, as long as it constitutes the foundation pile hole, regardless of the presence or absence of groundwater wells can be selected reinforcement Disposal Act. Always, the choice of Deep dynamic consolidation of skills, can help eliminate collapsible soil liquefaction, which also combines the features and characteristics of bearing piles composite foundation stiffness uniform. Not only high capacity, small deformation and austerity. 2, material specifications for low, according to local conditions; one of the most significant feature of the skills that are local conditions. Whenever inorganic solid materials such as soil, sand, stone, broken bricks, concrete blocks, industrial waste, and mixtures thereof, etc. can use. And materials without harsh processing, who can fill the hole can use inorganic solid materials. Materials without long-distance transport. 3, with high kinetic energy, high pressure and strong compaction effect; an important feature of the skill that is because the hole tamping pile hammer usually 100kN - 180kN, based on demand may be greater. Constantly rushing, smashing effect under power, so that the filler hole constantly being high kinetic energy, high pressure and splitting compaction. Tamping energy E up to 2000kN · m / m - 3000kN · m / m or higher, it is usually Pounding energy 5--8 times, according to the engineering design needs but also for increase or decrease. 3, 1, for a wide range of hundreds of engineering examples, treated all kinds of difficult ground; 2, with high kinetic energy, ultra-pressure, high compaction results; 3, high capacity, deformation modulus, compression deformation is small ; 4, the depth of deep processing; 5, the overall stiffness of the ground even after treatment; 6, low cost local materials; 7, time is fast, fully mechanized construction, little affected by the seasons, high production efficiency; 8, construction hazards small ( vibration, noise, air pollution, etc.). 4, DDC pile foundation treatment with other methods of comparison with the strong 4.1 Comparison of dynamic compaction compaction method has been widely used in China, but its drawback is the large construction noise, pollution significantly, tamping energy per unit area is small, only when tamping is dynamic compaction, due to differences in the effective area and the affected zone, deep compaction is difficult to achieve the effect of strengthening the depth is limited. Foundations lie deep under layers of weakness, only to increase crane lifting capacity and increased lifting heavy hammer before work. Due to the above reasons, the promotion of the use of dynamic compaction is restricted in the project. DDC is a dynamic compaction pile hammer for deep hole filler, filler stratified compaction or side edges of the hole deep compaction jobs. Its low noise, low pollution, under the weight of a small, high-pressure special hammer effect, can produce thousands of kN? M / m2 high pressure and strong momentum. Due to the small diameter of the pile hammer, the hammer has the same weight and drop from the condition, the DDC unit area of ??tamping energy much larger than the dynamic compaction. When the construction of the deep and shallow stratified filling in the hole, layered Pounding side or edge fill ram, so the method has a high kinetic energy, high pressure, high compaction effect. Direct reinforcement in the deep layer of soft, bottom-uniform foundation reinforcement, DDC pile of project examples deepest processing has reached 60m, while the dynamic compaction generally less effective reinforcement depth of 10m, it is very important to the DDC technology One of the features. DDC pile pile hammer construct useful innovation. It is not a flat shape, but showed a rod or cone was olive-shaped, much more superior than the flat hammer. When the compaction of the lower filler is deep dynamic ram, smashing, compaction, is the driving force of the new packing upper ram, smashing, splitting and forced lateral compression. Through dynamic compaction pile hammer, the hammer side, have a great dynamic passive earth pressure, forcing the filler hammer bulldozing forced out to the periphery, between piles of soil compaction has also been strongly reinforced. This is a unique technology of two DDC pile. DDC pile foundation treatment, from top to bottom have been reinforced, was uniformly dense state. And on the strong foundation of Dynamic Compaction weak, there are weak when lying next layer, the foundation reinforcement reach the goal, which is three technical characteristics of the DDC. In conclusion, treatment with DDC pile foundation compactness and uniformity are good, reinforced high energy tamping great depth. The weight of a small pile hammer hammer compaction ratio, low condition of equipment requirements, pollution produced by small, has a big advantage over dynamic compaction. Second, the characteristics of the DDC: 1, for a wide range of planning, can be used to dispose of all types of foundations; ???? disposal in foundation engineering, Deep dynamic consolidation and other skills contrast, can be applied to a variety of ground clutter strata reinforcement disposal, with broad applicability. Uneven ground such as for large thickness of the loess, miscellaneous fill, liquefaction ground, all kinds of soft soil, collapsible soil and an acid, alkali and salt corrosion of the foundation, has a hard sandwich, stone and scrap waste backfill ground and a variety of messy construction sites, such as the disposal of underground civil air defense fortifications. By drilling, punching and other methods to force into the hole, as long as the constitution pile foundation hole, regardless of the presence or absence of groundwater wells can be selected reinforcement Disposal Act. In short, the choice of Deep dynamic consolidation of skills, can help eliminate the collapsible wet soil liquefaction, which also combines the features and characteristics of bearing piles composite foundation stiffness uniform. Not only high capacity, small deformation and austerity. 2, with a low material standard, tailored; one of the biggest features of skills, is able to tailor. Any inorganic solid materials such as soil, sand, stone, broken bricks, concrete blocks, industrial waste, and mixtures thereof, etc. can use. And without harsh processing materials, who can fill the hole of inorganic solid materials can use. Without long-distance transport of materials. 3, with high kinetic energy, high pressure and strong compaction effect; this skill is an important feature because of the hole in the pile hammer tamping generally 100kN - 180kN, more may be needed. Constantly red, hit the power under the action, so that the filler hole constantly being high kinetic energy, high pressure and splitting compaction. Tamping energy E up to 2000kN · m / m - 3000kN · m / m or higher, it is generally Pounding energy 5--8 times, according to the project plan needs but also for higher or lower. 4, significantly advancing the foundation bearing capacity; the choice of Deep dynamic consolidation, with high kinetic energy, high-pressure, high impact energy, the role of the foundation bearing capacity of the disposal of significant progress. Soil ballast pile fk = 1000kPa - 1800kPa, composite foundation fspk = 200kPa - 800kPa, natural foundation for the original three times --9 times. Hole filled with concrete compaction pile capacity than the general bearing capacity Bored forward twice disposal. 5, foundation reinforcement disposal great depth; general disposition depth 20m - 30m, up to 50m above the deepest time. And up and down evenly. Ground forces holding soil layer can be reinforced within the planning, weak lying under deep layer may also be reinforced, can significantly improve soil properties. 6, pile diameter, compaction reinforcement planning big pile beaded; kneading at high kinetic energy impact, the pile diameter is generally up to 500mm - 2500mm dominated in soft soil, with greater lateral squeeze dense effect. In layered soil, pile lanes beaded, between piles was "bite" and "hold fast" strong compaction appearance. The selection of coarse aggregate as reinforcement material, the pile foundation drainage channel is also conducive to the fullness of land drainage consolidation group. Can be reinforced with soil Planning pushed into the water within the soil reinforcement area to go outside. Soil improvement foundation, reinforcement planning big impact. 7. austerity high modulus composite foundation settlement deformation, bearing good traits; between piles and piles of soil with excellent job characteristics. Pile material was strong high pressure under the impact of kneading, between piles was obvious lateral kneading dense, so that after the disposal of composite foundation down evenly, domination, "hold fast" dense "bite" crunch modulus significantly forward, bearing traits improved significantly reduce ground crunch large deformation. E0 value of up to 30MPa - 40MPa more. 8, good social and economic benefits. Because of the skill with high kinetic energy, high pressure in the deep dynamic compaction characteristics of the hole, so little vibration, low noise, eliminating ballast soil contamination, can be widely used in the disposal of city construction projects of the foundation. To purify the human environment, waste, soil ballast "turning waste into treasure," spent a lot of waste. In recent years, almost a hundred bear foundation disposal project, will have more than one million tons of waste disposal for the foundation, together and reduce the vibration, noise, inorganic solid materials pollution on human society. Can save a lot of steel, cement, reduce project cost, reduce excavation and foundation reinforcement material reciprocating delivery costs for ground disposal and transport processes on the environment pollution. Three, DDC backfill soil foundation piles in the Shanxi Yangquan Coal unloading 800,000 tons of alumina and bauxite factory yard and other children of the large thickness of a miscellaneous fill foundation treatment works, engineering survey and geological conditions: ?? Yang coal Group proposed 800,000 tons of alumina factory on the outskirts of Yangquan, Yangquan raw bauxite ore district, north of Taihu their village, east of the camel Lingtou village, southwest for the next five Ducun. The alumina plant for large industrial plants. Is a national key project, the entire field area covers a total area of ??about 1,000 acres, invested 2.3 billion. The proposed site of the original ridge blossoming landscapes, undulating terrain, through the latter part of a large area of ??backfill. Bauxite and unloading yard, Bauxite homogenization yard, lime and other geological subkey digest large class miscellaneous fill gravel thickness, depth of about 40m, geological formations and downs uneven, and contains large stones, the largest particle size of about 3-4m. Second, the foundation treatment purposes and requirements: ?? 1, aluminum rear yard unloading and handling of composite foundation: fk≥350kPa, E0≥25MPa, processing depth -8.000m ~ -23.000m; ?? 2, homogenizing silo After digestion lime composite foundation: fk≥300kPa, E0≥25MPa, processing depth -4.000m ~ -19.000m; ?? 3, even after the overall stiffness of foundation treatment, meet the design requirements. Third, the treatment effect: After treatment DDC technology, pile bearing capacity is 607Kpa, pile bearing capacity of soil is 332Kpa, composite foundation bearing capacity exceeds the design requirements 350Kpa, composite foundation deformation modulus ESP reach 34Mpa More than design requirements 25Mpa. DDC technology 70000m2 ground handling during construction, the success in accordance with the original design intent, the scene nearly 100000m3 waste ballast soil of this area as SDDC foundation backfill material handling, turning waste into treasure for the country to save money more than 800 million. Praise Yangquan municipal government, Yangquan, design units, supervision units, reconnaissance units and peers. Summary of the meeting, deputy secretary of Yangquan heartfelt praise: "DDC technology is a frontier in nation-building, fully ultra-long promotion of new technologies." Zhengzhou Cable Factory miscellaneous backfill soil foundation treatment works a project overview and geological conditions in Zhengzhou Cable (Group) Co., Ltd. The new site is located in south-eastern suburbs of Zhengzhou City, Zhengzhou Economic Development Zone in the country, to the east by the open Fifth Avenue, west of Seventh Avenue through the open, the north of North Road, to the south by the north six-way, planning about 690 acres of land, the proposed plant # 2 aluminum alloy wire company building area 26378.18㎡, structure type gantry structure, height 11.4m, span 3 × 24 + 30m, single-column total load 430KN. The site belongs to the Yellow River alluvial plain landscape units, this site due to the formation of many local villagers dig sand pit, undulating terrain, ground elevation 87.6m ~ 99.8m, the largest relative height 12.2m, 2 # factory Central the total plant area The half was landfill, east miscellaneous soil backfill. The project site is divided into three engineering geological zones: Ⅰ area for flat-field region, the original topography, located in the western venues; Ⅱ sand pit area for distribution, human reasons for the formation, located in the eastern part of the site; Ⅲ area for landfill buried area for construction waste and garbage backfill formation, located in the middle of the venue. The water table elevation is about 85.8m, seismic fortification intensity is 7 degrees. Within the scope of the east building, 25% of the entire processing area for sand pit; the middle 50% of the entire processing area landfills, waste volume of approximately 260000m3. Because of the range of memory ??? handle a large number of the sand pit, newly backfill miscellaneous fill, large construction waste and garbage, and backfill thickness, is a high compressibility of soil, ground bearing capacity is low, even very poor. To ensure the structural safety of the plant, research institute decided to use Deep dynamic consolidation DDC pile foundation treatment technology for the project foundation treatment. Second, the ground handling requirements fk≥250kPa foundation bearing capacity of composite foundation ground part of the plant, the compression modulus Es≥20MPa, deformation modulus Eo≥20MPa; fk≥170kPa factory floor composite foundation bearing capacity, compression modulus Es≥15MPa, deformation modulus amount Eo≥15MPa, and uniform composite foundation stiffness. Third, the foundation backfill construction waste treatment method due to the accumulation of flora newly poor structural stability at impact 孔时容 prone to collapse into a hole phenomenon. It was decided to take the measures cited hole, then DDC impact compaction machine into the hole to the design depth. This measures to speed up the construction progress, shorten the construction period. Fourth, after the construction of the treatment effect of foundation treatment by Geophysical Exploration Center, China Earthquake Administration, Zhengzhou Institute survey works on the basis of ground treatment plant # 2 effect was detected after treatment DDC technology, composite foundation bearing capacity increase by 120kPa 250kPa, compression modulus increased from 8.5Mpa to 17.3Mpa; deformation modulus by 11.2Mpa increased to 34.4Mpa, the indicators are doubled, ground treatment effect is obvious. After two years of settlement observation, small and uniform foundation settlement, fully meet the needs of the upper structure. DDC technology itself to construction debris or dust as the pile material, low cost, the treatment effect is obvious. Ground treatment works originally planned 500 million, the actual cost of 2.9 million, saving a lot of money for the construction units. This project since November 15, 2002 started, excluding the impact of various factors, the actual construction 83 days. Consumptive construction waste 68626m3, complete compaction task 92424m3 pile material. After DDC technology, the original 220 000 m3 of construction waste is not only without excavation processing, and the processing of nearly 70,000 cubic meters of construction waste, turning waste into treasure, to achieve significant economic and social effects. Beijing highway overpass large thickness rings Fushi Fill foundation treatment works a project overview and geological conditions:? Beijing Fifth Ring Road Laoshan Road - the main road and Fushi Fushi Road overpass located west of Beijing Shijingshan District , proposed site distributed on a large miscellaneous pit, formerly quarries, gravel has been mined-upper, maximum depth of thirty meters, the most shallow than ten meters deep, forming shades, size is not and other quarry pit. After industrial waste, construction waste (concrete block maximum diameter 2-3m), garbage backfill, backfill time have long or short, filling thickness varies, wide distribution, bulk weight consolidation has not yet formed, UNEVEN therefore deformation, and has Collapsible. Its bearing capacity in just 100kPa, compression modulus of 5.0Mpa, the large thickness Fill foundation can not meet the design requirements. ??? Designed units and experts, the construction unit decided to use DDC Deep dynamic consolidation of the foundation ground treatment technologies for processing. Second, the foundation treatment purposes and requirements: ??? a bearing capacity of composite foundation must meet the requirements of processing fk≥200kPa; ??? 2, the overall stiffness of the foundation treatment uniform?. Third, the treatment effect: the construction unit commissioned a national third-party testing unit testing, test concluded: bearing capacity of the standard value fk≥200kPa, the overall stiffness of the uniform, to meet the design requirements. This project uses DDC hole deep compaction pile construction, pierced by a variety of miscellaneous junk backfill in the construction of large thickness to fill the pit, and achieved good technical results, the foundation stiffness even after treatment. This example shows that the hole deep compaction technique in dealing with large thickness DDC Fill foundation, with other technologies can not match advantage. Beijing Rui Stratton Foundation Engineering Co., Ltd. is a high-tech development and application of technology combined with traditional comprehensive national joint-stock construction enterprise qualification. The company, based on the traditional foundation treatment, also has nearly 10 patents by the chairman, Mr. Secretary Bingwen painstaking research engineer, where the DDC (Deep dynamic consolidation technique) is my company's leading products. Since its inception, has completed a large-scale industrial plants at home and abroad, one hundred thousand cubic meters of large storage tanks, large power plant main plant, cooling towers, chimneys, highways, bridges, directly under the national grain reserves, high-rise buildings, sewage treatment plants, defense projects and hundreds of rocket launchers and other satellite ground treatment works, the quality meet or exceed all design requirements, many times by industry authorities and construction units of the awards and praise, and won a good reputation in the community, is the capital Construction of a backbone enterprise architecture market. ??? The company has offices in Xi'an, Shanxi, Tianjin, Hebei, Henan, Gansu, Hunan, Hubei, Liaoning, Guizhou and other provinces and cities with projects department. Over the years, our company has carried out ground handling business and technology development of large construction projects in the North, East, Northeast, South, Northwest, Central Plains and other regions. ?? The company has always focused on the introduction of advanced technology and training of personnel, professional and technical level of the starting point for construction workers, rich practical experience, strong organization and discipline. The company has a professional staff of 500 people, senior technical staff of 80 people, all kinds of medium-sized and specialized construction equipment more than 300, with the ability to handle large, complex problems of large foundations. ?? Company fully implemented ISO9001 quality management system certification, with a complete quality management and quality assurance system, and flexible mechanisms and reliable reputation, integrity and willing to cooperate with each design and construction units, and work to build the future. Beijing Rui Stratton Foundation Engineering Co., Ltd. Contact: Mr. Secretary Tel: 010-63165853 Company Website: www.chinaddc.com Company Address: Beijing Fengtai District No. 58 Caihuying Western Building Wealth