Cost Management of Guan Gong Au Hydropower Station Project
Author: xiao tianyi Uploaded by: yeguiren Source: water conservancy engineering network 2005-09-12 00:00
Guan Gong Au Hydropower Station is located in the main stream of Luokou Creek in Qingliu County, Fujian Province. Luokou Creek is a tributary of Jiulong Creek and belongs to Shaxi water system of Minjiang River Basin. The project dam site is located in Changtan River and LuoKou Creek confluence upstream of about 700m on the LuoKou Creek, the dam site above the control basin area of 1220km2, the total reservoir capacity of 7.3 million m3, the project to power generation, the total installed capacity of the power station 2 × 8000kw, is the history of Qingliu County, the largest installed capacity of the hydroelectric power station. The hub of the power station consists of a barrage, a power diversion system, a plant behind the dam and a booster substation. The barrage is a fine aggregate concrete masonry gravity dam, with a maximum height of 39m, adopting the roof spillway flood relief and the wide-tailed pier bailing pool joint energy dissipation. The power station project by the Fujian Province, Fujian Province, Sanming Electricity Bureau, Xiamen Youen Power Co., Ltd. and the People's Government of Qingliu County, Fujian Province, a joint venture (investment ratio of 70%: 30%), the estimated total investment of 92.12 million yuan, and in July 2000, officially started, in November 2003 was completed and put into operation to generate electricity. The implementation of the project has established a series of systems such as owner responsibility system, bidding system, construction supervision system, contract management system, and other effective management of the project.
1 Implementation of the owner's responsibility system, improve the cost control initiative
Project owners as the direct managers and beneficiaries of the project, to the project planning, fund-raising, construction, operation, repayment of loans, asset preservation and other responsibility for the whole process, always aiming to improve the overall economic efficiency of the power station, control the quality of the project, project cost and schedule, which determines the role and status of the owner. Guan Gong Au Hydropower Station in the early stage of construction that is the formation of a competent project legal person, in accordance with the modern enterprise system set up the owner of the unit - Fujian Province Qingliu Guan Gong Au Electric Power Co. (hereinafter referred to as Guan Gong Au Power Co., Ltd.), and effectively fulfill the owner's responsibility, so that the enterprise has enough autonomy to reasonably allocate funds according to the actual progress of the project and the completion of the investment, make timely decisions to deal with various problems encountered in the process of construction, and dare to adopt new technologies, new techniques, in order to ensure that the construction of the project is of high quality and high speed, so that Guan Gong Au Hydropower Station is completed and put into operation on time.
2 Optimization of the design program, reduce project costs
Design is the foundation of the capital construction, hydropower station design is the most basic elements of the project investment, but also to control the project cost of the first link. Due to the complex geological structure of the Guan Gong Au hydropower station project, limited by the depth of the preliminary geological exploration work, the preliminary design review and approval of the original dam picking energy dissipation program requires additional geological exploration and demonstration, by the results of the hydraulic model test and the demonstration of the design program, the dissipation of the energy program changed to a wide-tailed pier bailing pool energy dissipation design, increasing the investment in a wide-tailed pier and the bailing pool, coupled with the actual excavation of the geological conditions than the estimated to be much worse, is a rare in Fujian Province, and the design is the most important part of the project. In addition, the actual excavation revealed much worse than predicted geological condition, which is a rare geological structure in Fujian Province, and the foundation excavation increased a lot, the foundation treatment was complicated, and the filling volume of the main project increased, which made the investment in civil engineering increased by more than 18 million yuan. Guan Gong Au Power Co., Ltd. for the actual project, pay close attention to the optimization of the design scheme, boldly implement new concepts, give full play to the ingenuity of engineers and technicians, and successively invited Hohai University, the Central South Academy, the Fujian Provincial Water Resources Department, Fujian Provincial Hydraulic Mechanics Association, such as the special committee of the well-known experts and scholars to the scene to guide, advise, solve engineering and technical problems, optimize the design scheme. Through the optimization of the design scheme, the project cost is saved, so that the total investment of the whole project is effectively controlled within the estimated budget.
(1) optimization of construction diversion scheme. The original design of the first phase of the diversion of the left bank nullah diversion. During the construction, when the first phase of the channelization nullah platform excavation is basically over, due to geological reasons, the left bank slope landslide (1 # landslide), the channelization nullah platform and dam dissipation bailing pool part of the overall coverage, the schedule was delayed for more than three months, the project construction is in a stalemate. The owner of the timely organization of the owner, design, supervision units and contractors of the technical force, and invited the experts of the South China Academy, to the scene **** good advice. After multiple program selection, careful argumentation, the design unit agreed to change the left bank nullah diversion program for the right bank nullah diversion, the first phase of the diversion nullah is arranged in the right bank of the power generation diversion system, the main plant tailpipe and the tail water channel location, and reserved longitudinal rock ridge as a longitudinal weir, the right bank diversion channel excavation and construction, to solve the problem of the diversion of the diversion of the diversion of the diversion project investment of more than 1.8 million yuan to shorten the main project excavation period. The construction period was snatched back, and a solid foundation was laid for the on-time completion of the power station.
(2) Optimization of dam face slurry masonry and dam body seepage control wall program. The original initial design of the dam upstream and downstream of the dam face using slurry square block stone structure, and in the upstream side of the dam body to set up a concrete seepage control wall, due to the limitations of the ground material conditions, the quarry test mining confirmed that the mining of square block stone. In the construction design, Guan Gong Au Power Co., Ltd. after demonstration, proposed to amend the upstream dam for the use of concrete seepage panels, and the abolition of the dam body seepage control wall, the downstream face of the dam using cast-in-place concrete dam face program, to provide the design unit demonstration, design, and successfully put into practice. Solve the problem of lack of ground material, saving the project cost of more than 600,000 yuan, and speed up the construction progress, shorten the construction period, improve the seepage control effect of the dam.
(3) Boosting substation layout optimization. The original design of step-up substation is arranged on the right bank of the dam downstream side (about 0-035m below the dam) on the top of the hill, the design elevation of 315.00m (the design elevation of the top of the dam and the elevation of the road surface on the dam is 294.00m). The arrangement of the program occupies more forest land, land acquisition and forest compensation costs; large amount of earth and rock excavation; the inner side of the dormitory building is adjacent to a forest farm, blasting danger; the main transformer and other equipment transportation problems are difficult to solve. For the actual project, combined with the experience accumulated in the construction process, we boldly explore, proposed to move the step-up substation from the top of the mountain to the right bank of the upstream side of the dam (0 + 010m above the dam), in the original a small concave, backfilled with stone slag (backfill has been 3 years long) on the platform (the dam standard contractors vehicle repair shop location), the design of the ground elevation of 298.00, only higher than the top of the dam elevation 4m, and will be the main transformer (1) and 35kv switch room layout in the field, slag filling as a booster station floor. Here there is a highway up to the dam, excavation is very small, does not occupy the forest land, the booster station layout is compact, equipment transportation is convenient, the program is better. Upon agreement, the design unit was provided to do optimization and design, and was implemented with good results. Optimization of this program, reducing the expropriation of forest land of more than 3200m2, reducing the earth and rock excavation of more than 60,000m3, *** save engineering cost of more than 2 million yuan, shorten the construction period of about 3 months, greatly reducing the cost of the project, so that the total investment of the entire project is effectively controlled in the proposed budget range.
(4) Funding program optimization. In the case of insufficient funds for construction, through the external attraction of the internal mechanism, the introduction of the Sanming Electricity Bureau, Xiamen Youen Electricity Co. million dollars.
3 through bidding, preferred contractors
(1) reasonable sub-bidding. Reasonable sub-bidding is the premise of bidding, but also to reduce construction interference, accelerate the progress of the project, reduce the cost of the project is a necessary condition. Ltd. in the construction of the initial, in line with the "possibility, divisibility, overall effectiveness" and other principles, give full consideration to both the formation of a competitive situation, but also to minimize construction disruption, to facilitate coordination between the construction units, the Guan Gong Au hydroelectric power plant main project is divided into five bids, namely, the barrage civil works The main project of Guan Gong Au Hydropower Station is divided into five standards, namely, barrage dam civil engineering standard (including earthwork excavation of plant and boosting substation), post-dam plant civil engineering standard (including boosting substation civil engineering), pressure steel pipe fabrication and installation engineering standard, steel gate fabrication and installation engineering standard, and hydroelectric turbine generator set fabrication and installation standard (including boosting substation equipment installation). At the same time, the electromechanical equipment and metal structure of a number of inquiry, merit-based procurement, engineering construction and equipment procurement in an open, fair and equitable competitive environment, give full consideration to the performance-price ratio, professionalism, corporate reputation and other elements, from the competition to select a good design, consulting, construction, supervision and supply of contracting units. Through the implementation of the competition mechanism, the use of the market at that time the advantage of low steel prices, turbine generator sets and electromechanical equipment, such as manufacturing and installation costs of the total contract price of only 8.8 million yuan, than the original estimate of 18.45 million yuan to save 9.65 million yuan. In this way, both to facilitate the control of project cost, but also to ensure the quality and progress of the project to create favorable conditions.
(2) reasonable bid evaluation and bidding. Considering the complex geology of Guan Gong Au hydropower station project, construction intensity, difficulty, high technology, tight schedule and other characteristics, for different engineering sub-bidding, the use of invitational bidding or open bidding to determine the construction unit, the qualification of the construction unit from the dam requirements, construction conditions, technical equipment level and other aspects of the clear requirements. The whole bidding process is always under the guidance of Fujian Provincial Bidding Office, under the supervision of Fujian Provincial Water Resources Department and other relevant departments, with "open, fair, just and transparent" principle of "three public and one transparent". Bid evaluation and bidding mainly from the schedule, quality, price, equipment capacity, construction experience, technical measures, contract reputation and other aspects of comparison, and to determine the duration of power generation of the main project for the quantitative analysis of the price and the overall benefits, and ultimately selected a number of domestic more excellent water conservancy and hydropower Minjiang Engineering Bureau, the first China Water Conservancy and Hydropower Bureau of Engineering, Fujian Province Water Conservancy and Hydropower Bureau of Engineering, Fujian Province, Nanping Electric Factory, Hunan Changsha Huaneng Automation Control Co. Ltd. and a number of domestic outstanding water conservancy and hydropower construction enterprises and equipment manufacturers with relevant manufacturing experience as a contractor.
Guangdong Au hydropower station project in the construction period, in addition to a few new items, the main project unit price almost no adjustment, investment growth is also within the scope of control, all kinds of equipment in the supply and installation of the period there is no claim and quotation adjustment events, all equipment in the initial operation stage are stable performance, normal operation. Guan Gong Au practice has proved that competition can promote technological progress, optimize the allocation of resources and promote the transformation of business practices, choose a reasonable offer to eliminate low bid, can ensure that the schedule, quality and control of project cost.
4 Implementation of engineering supervision system, the whole process of control
Engineering supervision is the middle link connecting the owner, contractor and the government's macro-management, the investment and construction activities of the project to carry out comprehensive supervision and management. Guan Gong Au hydropower station project by the China Water Conservancy and Hydropower Construction Engineering Consulting Zhongnan Company to undertake construction supervision, the implementation of all-weather, all-round, the whole process of the bystander supervision, in order to reasonably control the "progress, quality, investment" as the goal, strict checking, and conscientiously fulfill the "three control, a coordinating "Supervision duties. Supervision engineers mainly from the project, the use of materials and quantity measurement and other aspects of the project to control investment. In the actual work, firstly, do the inspection and review of the completed project, meanwhile, do the review of the application of major technical measures and the measurement of the volume of hidden works; secondly, determine the project settlement items and the use of materials in accordance with the contract documents, meanwhile, according to the principle and method of measurement of the volume of works stipulated in the provisions of the project, review and approve the settlement volume according to the progress. On this basis, the supervising engineer of Guan Gong Au Hydropower Station strictly examines and signs the monthly settlement statement and the calculation of project quantity, attached drawings and schedules of each construction unit, which is approved by the supervisor and then submitted to the owner for review, and then after verified by the financial management section of the project, the monthly project payment is paid in accordance with the provisions of the contract; and the technical visa of the supervising engineer is required to carry out the design changes and major technical measures occurred on the site. In this supervision system, Guan Gong Au hydroelectric power plant project construction has achieved fast speed, good quality, investment savings, high efficiency results, according to the plan as scheduled commissioning power generation, investment is also controlled within the budget estimates.
5 Strengthen contract management, strict control of investment
(1) adhere to the full implementation of contract management system. Guan Gong Au hydropower station project from design to construction is always in the form of a contract to regulate the behavior of the two sides, clear responsibilities of the two sides, the contract as a lever and bridge to contact the parties to give full play to the leading role of the owner in the construction period of the full range of full-course tracking of the contract implementation, organization, coordination and supervision of all parties to improve progress, quality and investment control. As the company has formulated strict contract management methods and clarified the responsibilities of each department, the whole project management has been incorporated into the contract management track, which has effectively controlled the progress, quality and investment of the project.
(2) Application of modern means. Guan Gong Au Hydropower Station Project has a special contract management personnel, with computer technology from the contract registration, payment, claims to statistics to implement integrated management, so that the contract as detailed as possible, complete and comprehensive, and make the contract text and related economic documents and budget estimates corresponding to the project, the realization of the budget estimates of the value of the contract, the contract price, the project settlement of a book, to a large extent, to reduce the errors and disputes in the management of the contract, and Effectively realizes the tracking management of contract implementation and improves the work efficiency.
(3) the classification of various types of accounts. Guan Gong Au Hydropower Station Project makes full use of modern computer speed, large capacity, easy to query and calculate the characteristics of the establishment of the contract ledger, settlement ledger, claims ledger, the main volume of work ledger and statistical ledger and other types of ledger, so that the factors affecting the control of investment in the project are closely linked to the vertical and horizontal, which is very convenient for project managers to comprehensively understand the completion of the investment in the project, and also make the exchange of data between the professional and technical personnel become simple, comprehensive and easy to understand. It also makes the exchange of data between professional and technical personnel become simple and comprehensive, and effectively avoids the overknot, early knot, more knot and some unreasonable compensation due to human omission or error.
6 Distinguish between lump-sum and unit-price contract items, reasonable compensation
Guankong Au hydropower station project in the construction period also inevitably occurred a lot of changes, additions and compensation for the project, GuanGong Au Power Co., Ltd. in accordance with the actual situation, according to the contract, the strict distinction between lump-sum and unit-price items, in the premise of the total budget estimate does not break through the flexibility of the budget estimate of the various sub-items of the project value, reasonable adjustment, to make it more in line with the construction of the project. The estimated value of each sub-project is flexibly controlled and reasonably adjusted without exceeding the total estimate, which is more in line with the actual needs of the project construction, and is also conducive to the management of the project construction, and promotes the project to reach the level of "high efficiency, high quality and low consumption". During the construction of Guan Gong Au Hydropower Station, more than 200 new projects of various types and more than 30 compensation projects have occurred, totaling about 10 million yuan, of which the compensation amount is nearly 2 million yuan. For these projects, Guan Gong Au Electric Power Co., Ltd. in accordance with the "Supervisory gatekeeper, the site of the amount, the company audit" procedures, carefully check the tender, contract documents and the relevant commitment, in line with the "seeking truth from facts, reasonable compensation" principle, for each project are Strict measurement, the recognition of unambiguous, should not be recognized resolutely not recognized. "No rules, no square", Guan Gong Au hydropower station project because of the strict audit procedures and principles, so that the project management work has a basis for effective control of project cost has laid a good foundation.
7 Conclusion
Guankong Au hydropower station project due to the owner of the unit in the design of the program optimization, bidding stage to choose a reasonable offer, the construction process and the full implementation of the project owner is responsible for the system, construction supervision system and contract management system, so that the main project in addition to the geological defects of the dam base of the new excavation and the corresponding backfill volume of the actual settlement of the project with the design to provide the volume of work basically in line with the total price of the project. The project quantity basically matches with the design, and the total price and unit price items are almost unadjusted, and the total investment of the project is effectively controlled within the estimated budget. The power station feed-in tariff approved by the price department for 0.30 yuan / kw.h, put into operation two years of operation and economic benefits show that the quality of the project is good, the economic benefits are significant.