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Boss He Yu-Residential Building in Huaihua, Hunan

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Boss He Yu-Residential Building in Huaihua, Hunan

  • Categories:Case
  • Time of issue:2021-08-05 09:59

(Summary description)He Yu, male, born in 1978. Served in the Beijing Pile Crane Division of Sany Group. I have been working in the after-sales service department since the beginning. The rotary drilling rig developed by Sany was commissioned and tested by him himself. Later, because of its rich experience in after-sales service. Responsible for the training of after-sales and marketing personnel in the company.

Boss He Yu-Residential Building in Huaihua, Hunan

(Summary description)He Yu, male, born in 1978. Served in the Beijing Pile Crane Division of Sany Group. I have been working in the after-sales service department since the beginning. The rotary drilling rig developed by Sany was commissioned and tested by him himself. Later, because of its rich experience in after-sales service. Responsible for the training of after-sales and marketing personnel in the company.

  • Categories:Case
  • Time of issue:2021-08-05 09:59
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Information

He Yu, male, born in 1978. Served in the Beijing Pile Crane Division of Sany Group. I have been working in the after-sales service department since the beginning. The rotary drilling rig developed by Sany was commissioned and tested by him himself. Later, because of its rich experience in after-sales service. Responsible for the training of after-sales and marketing personnel in the company.

He has been engaged in the training of after-sales and marketing personnel for many years. In addition to having a large number of trainees and such a huge resource, his many years of teaching experience and training process fully communicate and interact with trainees. Acquired keen market insight and judgment. It is believed that the pile foundation construction industry will remain the focus of national economic growth in the next 3-5 years. Resolutely decided to resign from Sany Heavy Industry in 2012 and began to enter the basic construction industry for construction.

In March 2012, Mr. He purchased a second-hand SR250 rotary drilling rig from Sany and began to enter the pile foundation construction industry. The equipment is mainly used in the construction of Xinning County, Shaoyang City, Hunan Province in his hometown. It is used for piling construction of plant foundations and building foundations for real estate. For piling construction and other projects, the diameter of the pile is mainly 800-1500mm, and the depth of the pile is generally 8-15m. The geological conditions are mainly backfilled soil, clay layer, and strongly weathered silty mudstone. It is smooth, regardless of the amount of construction work, as well as the speed and quality of the construction, but after finishing the construction of a real estate pile, I started to calculate the construction cost, and found that the fuel consumption of the construction cost accounted for a large part of the cost, which far exceeded my own Budget. After carefully analyzing each fuel consumption record, it is found that the fuel consumption of the pile with the hole diameter of 800-1000mm is close to that of the hole diameter of 1500mm. In other words, the cost of the KR250 rotary drilling rig is relatively large when the small hole is constructed, which causes a lot Waste. However, large models have great advantages when working with large pile diameters with an aperture of 1500mm, and have great profit margins. The 800-1000 pile holes with a small diameter are easy to construct with a small machine.

At that time, the small model of Sany Heavy Industry's rotary drilling rig was mainly SR150C. Compared with piles with a hole diameter of 800-1000mm, the fuel consumption was still large, the construction cost was high, and the transportation was also inconvenient. Two vehicles were required for transportation. high cost. It takes a long time to assemble the drilling rig, and the construction cannot be done immediately; when the space is small, the rotation space is insufficient, and the large rotary drilling rig cannot enter the site, which is very inconvenient. When all the questions are here, it is quite distressing. Just by chance, I heard that Jiangsu Taixin Machinery Co., Ltd. produces KR125 rotary drilling rigs. It is simply a product tailor-made for yourself.

This model is equipped with integral transportation with drill pipes, and only a trailer is required for transportation; the design is lightweight and can be constructed in a small space; it only takes half an hour from the pallet truck to the construction to be able to quickly construct, saving a lot of time; In the construction of the same small aperture, the fuel consumption is low.

In April 2013, the KR125 rotary drilling rig was purchased from Jiangsu Taixin Machinery Technology Co., Ltd., and the original SR250 rotary drilling rig was used for construction.

Second cooperation with Boss He

The project that Boss He and we are cooperating with is about the pile foundation construction of a building in Huitong County, Huaihua, Hunan. The local construction site is a typical geology: the stratum is distributed in order of plain fill, strongly weathered silty mudstone, and moderately weathered silty mudstone. According to geological reports and site surveys, its average uniaxial compressive strength is about 10MPa. Mudstone is mainly composed of clay minerals (such as hydromica, kaolinite, montmorillonite, etc.), followed by detrital minerals (quartz, feldspar, mica, etc.), epigenetic minerals (such as epidote, chlorite, etc.), and iron Manganese and organic matter. The texture is soft, the degree of consolidation is weaker than that of shale, and the recrystallization is not obvious.

The project is mainly located in the northern part of the county seat of Huitong County. The main task is to dig out the mountains and fill the valleys. The buildings in this community are mainly located on the mountainside, and the height of the buildings is a small 7-story tall building.

 

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Overall real estate vision

 

The construction equipment is the KR125 rotary drilling rig produced by Jiangsu Taixin Machinery, equipped with 800mm pick double bottom dredging bucket, dry hole operation. Huitong County is rich in water resources. When the borehole reaches 3m, you can see the water at the bottom of the borehole. Putting the steel cage and pouring concrete 30 minutes after the drilling is completed, otherwise there will be a lot of water in the hole, which can reach a depth of 4-5m. When pouring the concrete, a water pump needs to be used to pump the water out. The selection of drill rods, because of the on-site stratum and the performance of the KR125 rotary drilling rig, most of the piles in the project are between 8-9m, and the drill rods are 4× The rod does not need to be extended, the weight of the drill rod itself plus the pressure transmitted by the power head, the torque of the KR125 rotary drilling rig reaches 12.5Tm, which is enough to break the rock cutting. So as to achieve the purpose of drilling.

 

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The above picture is the concrete rock picture of the site construction

 

 

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The water surface can be clearly seen in the photo 30 minutes after the completion of the construction.

 

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Rock fragments poured out by drilling

 

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KR125 rotary drilling rig under construction

 

Epilogue: Considering the actual pile filling speed and the production speed of the steel cage, the construction site averages about 10 piles every day. The drilling rig itself, as well as the construction speed and quality are full of praise, thinking that the equipment is simply tailor-made for building piles. In addition, the payment terms of the construction site are good, and the accounts are settled at the end of each month. Greatly ease the financial pressure of the construction party. The construction party stated that a KR125 rotary drilling rig will be added by the end of the year.

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