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Department of Structures and Materials, IWHR BEIJING IWHR-KHL Co.,Ltd.
www.khl.com.cn     2013-06-13 15:12         
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Department of Structures and Materials, IWHR

BEIJING IWHR-KHL Co.,Ltd.

 

 

Since its establishment in 1958, the Department of Structures & Materials of IWHR has been mainly focusing on conducting researches and providing engineering solutions for the applied fundamental theories and technical problems encountered in the design, construction and operation of large and intermediate scale hydraulic and hydropower projects. It has been actively involved in the related research topics granted by the national scientific and technological development programs, National Science Foundation, State Ministry of Water Resources and domestic hydropower development corporations of different river basins, creating scientific guides for engineering design, construction and macro-policy making of the state. Up to now, the department has undertaken several hundreds of science and technology development research projects on hydraulic and hydropower construction, among which some prominent names are the Three Gorges Project, Xiaolangdi, Xiaowan, Jinping Stage I, Xiluodu, Laxiwa, Longtan, Guanzhao, Shapai, Shuibuya, Hongjiadu, and central line of Water Transfer from South China to North China and has solved numerous complex engineering problems.

The Beijing IWHR-KHL Co., Ltd. was founded in 1993 as a technology-oriented enterprise through the reform of the scientific and technological development system of IWHR. With the Department of Structures and Materials of IWHR as the technical support and IWHR as the controlling stakeholder, the company has a registered capital asset of 15,710,000 RMB. As a high-tech enterprise belonging to the Beijing Zhongguancun Science and Technology Development Zone, the company is dedicated to the research, development, promotion and application of new construction materials and technologies and has become a modern enterprise with multiple functions of marketing, research, technology development, construction and manufacturing. It has passed the ISO9001-2000 certification and owns a class-II contractor qualification for the foundation treatment of hydraulic structures.

The company now has a staff totaling over 150, with more than 70% holding a bachelor degree or above and masters and Ph.D.s taking a proportion of more than 20%. Among them, more than 20% have senior professional titles. 

施工资质jhli20071226123615201

 

一、Research Areas and Business Scope

         Research on applied fundamental theories of high performance dam concrete materials

         RCC construction technologies

         Crack control technologies for the face slab concrete of CFRDs

         Durability and safety evaluation for hydraulic concrete

         Research on fully-graded dam concrete

         Development, manufacturing and research on special concrete chemical and mineral admixtures

         Research on concrete adaptable to special and extreme environmental conditions

         Inspection, safety evaluation, repairing and strengthening technologies and materials for hydraulic structures

         Research, development and manufacturing of new water-stop systems and materials for hydraulic structures

         Research and construction of hydraulic asphalt concrete

         Rock anchoring technology and application

         Technical consulting, service and cooperation for hydraulic and hydropower projects both abroad and at home

         Applied technology research on ecological hydraulics

二、Researches and Achievements

The department has undertaken more than 30 research projects granted by the National Science Foundation, over 100 from the national scientific and technological development programs, and more than 80 key projects entrusted by different state ministries. It has won 16 national scientific and technological progress and natural science awards, 62 awards from various state ministries and 28 patents. The department has also been in charge of or participated in the formulation of more than 20 national or industry standards. So far it has published over 50 technical books.

 

         

 

            

 

三、Testing Facilities

The department owns the Key Laboratory (structures and materials) of Water Project Construction and Safety under the state Ministry of Water Resources and also a structure and material testing sub-center affiliated with the engineering inspection center of IWHR. The laboratory covers an area of 3,000m2 and is equipped with more than 100 sets of main testing devices, among which are the first 15000kN servo-hydraulic closed loop universal testing machine in China, the first freeze-thaw testing machine for fully-graded concrete in China, the adiabatic temperature rise testing machine for fully-graded concrete, the large scale walk-in environment-simulating chamber, the low-temperature fracture testing machine for asphalt concrete, and other imported advanced apparatuses such as the thermal expansion coefficient testing device and the air void parameter graphic analysis device. The laboratory can now inspect and test more than 160 parameters for hydraulic structures and materials. 

           

               

四、Research on Concrete and New Materials in Hydraulic Engineering

Experimental research and mix proportion optimization for concrete in Three Gorges project: The notion of high performance dam concrete was introduced to optimize the concrete mix proportion for the project, resulting in saving 40~50kg/m3 of cementitious materials, lowering the adiabatic temperature rise and drying shrinkage, and enhancing the crack-proof property and durability of concrete. A total of 200 million RMB of investment was spared and the research achievement ranked at the first class level both abroad and at home.

Concrete mix proportion optimization and property experimental research for Xiaowan dam:With respect to the raw material characteristics, an optimized concrete mixture which met the design requirements and exhibited high strength, low hydration heat, high tensile strain capacity, low elastic modulus, high durability and non-shrinkage was developed. The results were successfully applied and played an important instructive role in the quality control, thermal cracking prevention and the actual dam concrete behavior analysis of the project.

Concrete mix proportion optimization and property experimental research for Longtan dam: The department was fully engaged in the research and consulting service of the Longtan RCC dam for the raw material selection, quality control, mix proportion optimization and property testing of fully-graded concrete, and came up with scientific and effective technical guidelines for the project. The research indicated that partially replacing fly ash with limestone powder would not affect the workability of RCC, and when compared with the reference RCC, the mechanical properties of RCC with 28kg/m3 of fly ash replaced by limestone powder didn’t experience any decrease.

 

 

Research on concrete mix proportion and alkali-aggregate reaction for the central line of Water Transfer from South China to North China project: Targeting at the prevalent alkali reactivity of aggregates found along the Taihang Mountain and Yanshan Mountain in mid-northern China, and also considering the specific concrete characteristics of the project, the “Technical Specification on Prevention from Alkali-Aggregate Reaction for Concrete Structures along the Central Line of Water Transfer from South China to North China Project” was formulated and promulgated into application. Through optimized selection of admixtures and mix proportions, the construction difficulties for the C50 concrete of Caohe River aqueduct and C60 concrete used in PCCP pipes along the Beijing section were successfully resolved.

      

五、Inspection, Safety Evaluation, Repairing and Strengthening Technologies and Materials for Hydraulic Structures

An inspection, safety evaluation, repairing and strengthening research center is set up within the department. It consists of experts and technical personnel specialized in the inspection and safety evaluation for hydraulic concrete structures and a construction team specialized in structural repairing and strengthening. The department has achieved a well-recognized reputation in the field inspection, safety evaluation and rehabilitation construction for hydraulic structures. In the last decade, it has completed about a hundred of inspection and safety evaluation works for reservoir dams, hydropower plants, tunnels, barrage sluices and water transferring aqueducts, and also finished repairing, strengthening, seepage control and abrasion prevention treatment construction jobs for more than a hundred of hydraulic and hydropower projects. Enormous engineering experiences have been accumulated during this process.

1、         Non-destructive inspection of concrete structures

With many advanced non-destructive inspection instruments such as the imported geoloical radar, ultrasonic detecting device, reinforcement corrosion detecting device, reinforment locating device and etc, the company is capable of performing the reconnaissance for defects in hydraulic structures and in-situ detection for concrete strength, carbonation depth, reinforement rebar corrosion, chloride ion contents, permeability coefficients, width and depth of cracks, separation of slabs from foundation, thickness variation of concrete linings and exterior water pressures.

 

     

2、         Safety evaluation for concrete structures

The company has completed safety evaluations for more than a hundred of hydraulic and hydropower projects, including the Fengman Dam, the barrage sluices of Sanshenggong on Yellow River, Sanjiadian in Beijing and Suxian in Anhui Province, the water transferring tunnel diverting Luanhe River to the city of Tianjin, the height increase for the Songyue Reservior dam in Jilin Province, concrete structures along Jing-Mi Water Canal System and etc.                     

                  

Long-term operation safety evaluation and feasibility study on extensive treatment plan for Fengman Dam: A thorough safety evaluation was made taking into consideration of the flood discharge capacity, the entire concrete quality, the sliding resistance and seismic parameters of the dam, thus to bring up complete strengthening plans. Through comprehensive evaluation of those options, a solid scientific basis was supplied to the feasibility of structural treatment for the dam.

Temperature and construction control technologies for building RCC dam in frigid and high-altitude areas: (1) Research on temperature control technology for new dam construction: Based on a RCC dam in Xinjiang province, the thermal cracking control study and analysis using dynamic-tracking simulation throughout the construction period were performed. The temperature and stress distributions within the dam body were precisely predicted to furnish feedback to design, guide construction and adjust the temperature control measures. (2) Research on temperature control technology for RCC dam height increase. Based on the height increase for Songyue RCC dam, studies on crack prevention of the elevated dam body, interaction between the old and new dam portions, stress distribution on the interface between old and new concrete, the dam height increase construction procedures and the upstream stress status of the old dam portion after height increase were conducted.

3、         Repairing and strengthening of concrete structures

The company owns specialized construction equipments and new repairing technologies and materials. It can undertake all kinds of rehabilitation works including full-scale structural repairing and strengthening, permeability control and leakage blocking, abrasion prevention, carbonation resistance, crack strengthening and seepage-preventing treatment, and reinforcing rebar anti-corrosion treatment for concrete structures.

In Xiaowan hydropower station, the entire dam upstream face was protected using sprayed flexible seepage-proof coatings and bonded GB flexible plates, with a total treatment area of 20,000 m2. After impoundment testing, it has achieved an excellent seepage control effect. The work has been designated as a “Model Project” by the owner – Xiaowan Hydropower Construction and Administration Bureau.

   

 

   

 

六、Research and Application of New Waterstop Structures and Materials for Hydraulic Concrete Structures

A new type GB waterstop structural system for high concrete-faced rockfill dams (CFRD) has been put forward, and a series of GB waterstop materials have been developed. They have been successfully applied not only in many high CFRDs like Shuibuya, Hongjiadu, Sanbanxi and Zipingpu in China but some international projects like Bakun in Malaysia and Nam Nugm 2 in Laos, among which 20 CFRDs exceed 100m in height.

 

                                                           Top waterstops of perimeter joint of Shuibuya CFRD

  

七、Core Products and Promotion

The company’s manufacturing plant covers an area of 20,000m2, producing GB series waterstop materials, SK series special concrete chemical admixtures and repairing materials and smart anchoring systems.

1、         GB series waterstop materials

1)Waterstop products

The development of GB waterstop products keeps a synchronized pace with the CFRD construction in China. Based on the key scientific and technological projects from the nation’s “7th-5 year”, “8th -5 year” and “9th-5 year” plan and China Guodian Coorporation, and through nearly 20 years of practical application and product upgrade, GB series waterstop materials with continuously improved properties have been developed and successfully adopted in more than 100 hydraulic and hydropower projects including Shuibuya, Hongjiadu, Sanbanxi, Bakun (Malaysia) and Nam Nugm 2 (Laos) both in China and abroad.

 

Dsc040561    Dsc04075(中2)    GB-Zhishuitiao

GB flexible filler           GB EPDM composite cover board        GB filler strip (plate)

 

止水带立式交叉接头盖板T型接头(没扁钢)波浪形止水带

Corrugated rubber waterstop      T-type joint of composite cover board       Spatial waterstop joint 

                                

       Other auxiliary products: GB composite rubber board, GB composite geo-membrane waterstop board, GB composite rubber waterstop, GBW water-expansive waterstop strip, composite corrugated rubber waterstop, SK sealing agent, SK primer and etc.

2)Construction equipment for waterstop materials

The GB flexible filler extruder can significantly enhance the filler compactness and accelerate the construction speed.

3)Application of GB waterstop materials in CFRDs higher than 100m

No.

Project

Location

Dam height

(m)

Year of

application

1

Shuibuya

Badong, Hubei

233

2004

2

Bagong

Malaysia

202

2005

3

Sanbanxi

Hunan

185

2005

4

Nan Ngum2

Laos

181

2007

5

Hongjiadu

Qianxi, Guizhou

179.5

2004

6

Mazar

Ecuador

166

2008

7

Jilintai

Nileke, Xinjiang

157

2004

8

Zipingpu

Dujiangyan, Sichuan

156

2004

9

Dongqing

Beipanjing, Guizhou

150

2008

10

Jiudianxia

Gannan, Gansu

145

2007

11

Wawushan

Sichuan

138

2005

12

Wuluwati

Hetian, Xinjiang

138

1999

13

Yinzidu

Pingba, Guizhou

129

2003

14

Gongboxia

Xunhua, Qinghai

127

2004

15

Jiemian

Jiemian, Fujian

126

2005

16

Eping

Zhuxi, Hubei

126

2003

17

Heiquan

Datong, Qinghai

123.5

2000

18

Qinshan

Zhouning, Fujian

122

2000

19

Aesa

Iran

120

2009

20

Bajiaohe

Hefeng, Hubei

115

2004

21

Jinzhaoqiao

Fujian

111

2006

22

Miaojiaba

Wenxian, Gansu

111

2009

23

Shuanggou

Fushun, Jilin

110

2008

24

Dongba

Guangxi

107

2004

25

Yutiao

Chongqing

106

2000

26

Liyutang

Chongqing

105

2006

27

Sia

Iran

104

2009

28

Sianjiang

Linchuan, Guangxi

103.4

2004

29

Panshitou

Hebi, Henan

103

2003

30

Chaishitan

Yiliang, Yunnan

103

1998

31

Wenquan

Yili, Xinjiang

102

2009

Not listed in the table: Some 100 projects including pumped storage power stations of Ming Tombs, Xilongchi, Langyashan and Pushihe and CFRDs of Jianyu, Daao, Yutang, meidai, Merowe(Sudan) ,and Glendoe (Scotlang).

4)Typical projects

水布垭2

Shuibuya CFRD (230m)          Qinshan hydropower plant - where the new waterstop structure was first employed

 

紫坪铺工程      洪家渡_1

Zipingpu CFRD - withstood the severe Wenchuan earthquake surpassing the design standard    Hongjiadu CFRD (179.5m)

2、         SK series concrete admixtures

With their excellent properties and follow-up technical services, the SK series special concrete admixtures have gained widespread compliments from our customers and been adopted in a great many projects.

Main products:

       SK polycarboxylate superplasticizer

        SK-2 highly effective water reducer

        SK-2R highly effective retarding water reducer

       SK-H air entraining agent

        SK-6 pumping concrete admixture

        SK-D concrete sulfate corrosion resisting admixture

        SK-G non-shrinkage self-compacting grout

        SK-T 土壤固化剂

大连英那河


Yingnahe hydropower plant (SK-2 highly effective water reducer)

沙坡头      丰满1

Shapotou hydraulic pivot                                   Fengman hydropower plant

(SK-D concrete sulfate corrosion resisting admixture)           SK-G non-shrinkage self-compacting grout

八、Seepage Control Technology and Construction of Hydraulic Asphalt Concrete

 

From October 2003 to June 2004, the company conducted the strengthening construction for the Nangongdong reservoir in Henan province. A total of 12,000m3 asphalt concrete slope facing covering an area of 2,500 m2 was paved, with the surface treated with white sealing coating for aging protection.

From March 2006 to November 2007, the company engaged in the upper reservoir asphalt concrete face slab construction for Baoquan pumped storage power station. The seepage control construction area totaled 166,000 m2. It is the first among the similar projects in China built by a domestic contractor. It features the steepest slope and severe construction interference compared with other projects. The completion of this project facilitates the promulgation and application of asphalt concrete seepage control technology in China.

九、Rock Anchoring Technology and Applications

Featured by the compression-distributing style prestressed anchoring cable system, the company now possesses a whole set of technologies consisting of slope stability analysis, slope strengthening and treatment plan formulation, anchoring cable product research and development, slope treatment construction and remote monitoring and analysis for slope stability. Up to now, it has undertaken consulting and construction works of slope strengthening and treatment for a number of large scale projects such as Xiaban hydraulic pivot in Xinjiang province, Pushi river pumped storage power plant, tail water platform in Three Gorges powerplant, Yixing pumped storage power plant and Tongziling hydropower plant.

 

   

 

 

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