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Tianjin Yuantai Derun Pipe Manufacturing Group Co., Ltd., established in March 2002, is the biggest manufacturer specializing in  ERW square&rectangular tube/pipe, hollow section structure pipe, galvanized pipe and spiral welding pipe in China. Annual output reaches 5 million tons.Yuantai Derun has 59 production lines of black ERW pipe, 10 production lines of galvanized pipe and 3 production lines of spiral welding pipe. Square pipe from 20*20*1mm to 500*500*40mm, rectangular pipe from 20*30*1.2mm to 400*600*40mm,  welded pipe from 2”—60” can be manufactured. Yuantai Derun can manufacture square rectangular pipes as per the standards of ASTM A500, JIS G3466, EN10219, DIN2240, BS1387, AS1163.

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January 1993

Key team members of Yuantai Derun group began technical job in Tianjin Daqiuzhuang tube factory.

June 2002

Tianjin Yuantai Industry & Trade Co., Ltd. was founded, specialize in square, rectangular hollow steel pipe, hot galvanized welded (hot dip galvanized) square tube, the registered capital is USD 10 million.

May 2004

One of Yuantai subsidiaries Tangshan Lituo Steel Tube Co., Ltd. was established, specialize in square rectangular straight welded hollow steel pipe, registered capital is USD 10 million.

April 2005

Yuantai Steel Square Pipe Co. Ltd. was established, specialize in square welding hollow steel tube and galvanized tube, the registered is USD 2 million.

March 2010

Tianjin Yuantai Runxiang commercial trade company was established, specialize in strip steel trade, galvanized pipe agent, etc., the registered capital is USD 2 million.

March 2010

Tianjin Yuantai Derun pipe manufacturing group Co. Ltd. was formally established, marking that the production of high-frequency welded black, galvanized square pipe, spiral welded pipe, pipe logistics and pipe trade as one of the large-scale joint enterprise Yuantai Derun group was formally established, the group registered capital is USD 20 million.

March 2010

Tianjin Yuantai Derun Investment Co., Ltd. was formally established, specialize in steel pipe industry chain,lower industry mergers and acquisitions and industrial real estate development, the registered capital is USD 2 million.

August 2013

Tianjin Derun Runfeng pipe manufacturing Co. Ltd was established, specialize in hot galvanized (hot galvanizing) processing business, the registered capital is USD 8 million.

March 2015

Tianjin Yuantai Yuanda anti-corrosion insulation pipe Co., Ltd. was established, specialize in spiral welded pipe production and sales, the registered capital is USD 2 million.

August 2015

Tangshan Yuantai Derun Pipe Co., Ltd. was established, specialize in steel strip, steel pipe trade, registered capital is USD 1 million.

March 2016

Tianjin Yuantai Derun International Trade Co., Ltd was established,mainly engaged in international import and export business for Yuantai Group, registered capital is USD 2 million.

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Pipe pile construction process-news-TIANJIN YUANTAI DERUN PIPE MANUFACTURING GROUP CO., LTD-
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Pipe pile construction process
Pipe pile construction process

1. Basic knowledge of pile foundation

(1) Pile foundation

Pile foundation is the most commonly used foundation form among deep foundations. It consists of several piles sunk into the soil and a cap or cap beam connecting the tops of the piles.


pipe piles3.jpg


(2)The function of piles

The function of the pile is to transfer the load of the upper building to the deeper soil layer with a stronger bearing capacity or to compact the weak soil layer to improve the bearing capacity and compactness of the foundation soil.

(3)Classification of piles

Classification according to stress conditions

End-bearing piles: They are piles that pass through soft soil layers and reach hard soil layers or rock layers. The rock layer's resistance mainly bears the upper structure's load; during construction, the penetration is mainly controlled, and the pile tip enters the depth of the bearing layer or the pile tip. The elevation can be used as a reference.

Friction pile: completely set in the soft soil layer, and the weak soil layer is compacted to improve the compactness and bearing capacity of the soil. The load of the superstructure is borne by the resistance of the pile tip and the friction resistance between the side of the pile body and the foundation soil. , during construction, the design elevation of the pile tip is mainly controlled, and the penetration can be used as a reference.

Classification by construction method

Prefabricated piles: According to the method of sinking into the soil, they can be divided into driven piles, water-driven piles, vibration piles, and static pressure piles.

Cast-in-place pile: A hole is drilled at the pile location, a steel frame is placed, and concrete is poured into the pile. Cast-in-place piles are divided into bored piles, excavated cast-in-place piles, punched cast-in-place piles, sunken tube cast-in-place piles, etc.