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Earth-rock construction technology of water conservancy and hydropower projects

In recent years, the economic and technological development level of our country has been continuously improved. At this time, many industries and fields have also ushered in a new development situation, such as water conservancy and hydropower projects. They belong to the national infrastructure projects and have very important existence value. Specifically, the national economic development cannot be separated from them, and the development of the daily life of the masses cannot be separated from them. In the process of carrying out the project construction, the earth-rock construction technology is very popular. Only by selecting the construction technology correctly and controlling the quality can the construction quality of the project be effectively improved, the convenience for the life of the masses can be better created, and the significance and value of the project can be brought into play. Under this premise, the author expounds in detail the contents related to the construction technology of water conservancy and hydropower projects in our country. In recent years, China's economic development has begun to catch up with that of western countries. This rapid development has led to an increase in the total amount of electricity consumption. To meet the use requirements of users to the greatest extent, we need to actively carry out the construction of water conservancy and hydropower projects. Moreover, actively carrying out project construction can also promote national economic progress, regulate water resources and drive the orderly development of various industries. Earth-rock technology is an important component of the project construction work. Its existence is related to the improvement of the project construction quality. Only by actively and reasonably using the construction technology can the project construction efficiency be effectively improved, the construction regulations can be met, and the capital and labor can be saved better.

2023

03-09

Safety measures for earth-rock works

1、 Safety requirements for manual excavation of foundation pit and trench 1. During manual excavation, the operators must perform slope setting or support protection according to the requirements of the constructors. The horizontal spacing of operators shall not be less than 2m, and the longitudinal spacing shall not be less than 3m. It is strictly forbidden to dig holes and widen the trench from bottom to top to avoid collapse accidents. 2. During construction, ground water shall be prevented from flowing into pits and ditches to avoid slope collapse. 3. During deep pit excavation, keep the pit well ventilated. In case of any suspicious situation, stop the operation immediately and report to the superior for treatment. 4. It is forbidden to pile soil, materials and stop machines and tools within 1m from the excavated trench. The stacking height between 1-3m and 3-5 m shall not exceed 1.5m. 5. When the excavation depth exceeds 2m, two protective railings must be set at the edge. In dangerous places, red sign lights shall be set at night. 6. During the excavation process, the operator should pay attention to the change of the soil wall at any time. In case of any crack or partial collapse, the operator should immediately stop the operation, withdraw to the pit or groove, and report to the constructor to continue the excavation after the treatment is stable. 7. Personnel shall dig a ladder or set a wooden ladder before going up and down the pit, and shall not jump or step on the soil and wall and its support. 8. When excavating in soft soil and expansive soil areas, special excavation methods shall be adopted. The operators must obey the command and deployment of the constructors, and do not make decisions without permission or take risks to avoid accidents. 2、 Safety requirements for mechanical excavation 1. Personnel involved in mechanical excavation shall comply with the safety operation regulations of the machinery used, and all safety devices of the machinery shall be complete and effective. 2. The sequence of earthwork excavation shall be carried out in layers and sections from top to bottom. It is forbidden to use the operation method of hollowing out the footing, and drainage measures shall be taken. 3. Before using machinery to excavate soil, send a signal first. Personnel who cooperate with mechanical excavation shall work in the specified slope sequence when working in pits and trenches. No one is allowed to enter the working range of the excavator. 4. When loading soil, no one shall stay on the loading truck. 5. When using machinery to excavate in the trench with support, attention must be paid to prevent the machinery from damaging the support. 3、 Safety regulations for preventing earth collapse 1. The construction personnel must carry out excavation according to the requirements of safety technical disclosure. 2. Before earthwork excavation, water must be drained. 3. The soil shall be excavated layer by layer from top to bottom, and digging is strictly prohibited. 4. The pit (groove) must be equipped with a ramp or ladder for personnel to climb up and down. It is forbidden to dig the pit or climb up and down on the pit wall.

2023

03-09

How to do rebar planting well?

The construction process of construction engineering is divided into nine parts: Positioning → drilling → hole cleaning → reinforcement treatment → anchorage adhesive preparation → reinforcement planting → curing and protection → inspection Our workers drill holes at the required anchoring depth when drilling, and the hole diameter shall ensure that the reinforcement gap on each side is greater than 2mm. Then the workers clean the hole with air pump, and the hole is clean and free of dust. The amount of adhesive for rebar planting shall ensure that the hole is full and the rebar is screwed in until there is a little colloid overflow at the hole. After the consolidation of the rebar planting adhesive, the workers shall carry out the on-site pull-out test. The next step can only be carried out after passing the test. 1、 Positioning We first marked the drilling position and model according to the design requirements. If there are load-bearing reinforcement on the base material, the drilling position can be adjusted appropriately, but it should be planted inside the distribution reinforcement of the shear wall. The anti-skid hole shall be drilled, and the small hole shall be drilled with a chisel at the mark point of planting reinforcement to prevent the drill bit from sliding and dislocation during drilling. 2、 Drilling The drilling type is percussion drilling. First of all, the drill hole shall be perpendicular to the plane of the concrete member, with a slope of no more than 8 degrees (except for being too close to the floor without operating space or special requirements), and the drilling depth is 15d (d is the diameter of the reinforcement). The drilling progress should not be too fast, so as to prevent the heat of the drilling head from affecting the concrete strength around the drilling. When we drill holes, if the main reinforcement or stirrup in the original structure needs to be displaced and avoided, it can be displaced only after verification. 3、 Hole cleaning When removing the dust in the hole, it is necessary to clean the dust frequently during the drilling process. If there is ash residue in the hole, especially when drilling downward, the ash residue is not easy to run out. Otherwise, the drilling rig and drill bit will be burnt. At this time, workers can use blowers for high-pressure flushing during hole cleaning. After drilling, check the hole depth and hole diameter, blow out the dust in the hole with compressed air, then brush the hole wall with a brush, and blow the hole again with compressed air, which should be repeated for 3-5 times until there is no dust and debris in the hole. Before filling, the hole wall should be free of dust, oil and organic impurities.

2023

03-09

Construction technology and quality management of high-rise buildings

1、 Improve the management system and strengthen the control of steel structure construction process 1. We should improve the management system of the enterprise and build a detailed management system: rules are the foundation of the enterprise. Without rules, no square can be formed. Therefore, the enterprise should establish a complete system of safe production and quality management, and on this basis, the enterprise should also strictly implement these systems, standardize the operation awareness of the construction personnel, and reduce the construction risks caused by "human relations and relationships", So as to effectively improve the construction quality and efficiency. 2. Strengthen the process control of high-rise steel structure construction: the process control points of high-rise steel structure construction cover a relatively wide range, so the selection and control of process points should be determined according to the project characteristics, importance, complexity, accuracy and quality standards. Generally speaking, control points should be set at key positions. Meanwhile, corresponding control methods and preventive measures should be taken for processes that are prone to quality problems, such as component welding, so as to effectively control the quality of their construction processes. 2、 Strengthen quality inspection during construction and strengthen construction safety management 1. Strengthen the quality inspection during the construction of high-rise steel structures: before the project construction, the installation baseline, component model, number, support length, elevation, etc. should be pre-checked and rechecked, so as to effectively improve the construction quality of the process.

2023

03-09

Do you know the seven characteristics of steel frame structure?

7 characteristics of steel frame structure in construction engineering: 1、 Characteristics of steel frame structure materials The traditional construction industry mainly uses civil engineering to make bricks and tiles with soil as the raw material, uses calcined limestone to produce lime, uses sand and cement to prepare concrete, and uses steel and concrete to make reinforced concrete components. The materials of steel structure, unlike a large number of local materials used in the traditional construction industry, are all products of modern industry, such as steel, aluminum and various alloys provided by the modern metallurgical industry. There are also various welding fluxes and various coating materials, plastics and adhesives produced by modern chemical industry. Steel structure materials have accurate standards, high inspection requirements, strict storage, transportation and processing conditions, and most of them require mechanized operation. 2、 Fabrication and installation features of steel structure It is basically manufactured in the factory, transported to the site and installed, and the main structure is completed by welding or bolting. Since it is manufactured in the factory, various processing methods of modern manufacturing industry can be used, including welding, bolting, cast steel, hot bending and cold bending, hot rolling and cold rolling, and various detection methods can be used, including physical and chemical testing, ultrasonic testing, radiographic testing, magnetic particle testing, etc., to make the processed components more accurate and quality more guaranteed. 3、 High measurement requirements for steel structure Generally, the size error of civil engineering is measured in centimeters, while that of steel structure is measured in millimeters. If it fails to meet the requirements, it will not be possible to install successfully. Forced installation will also produce huge initial stress, which will bring hidden dangers to the structure.

2023

03-09

The concrete always cracks, and the main culprit is them!

Concrete cracking is a very headache problem in construction engineering. The common causes of cracking are as follows: 1、 Unauthorized change of water-cement ratio during construction During the construction of pumping concrete, in order to facilitate the construction, water is added without authorization to improve the fluidity of concrete, or the water-cement ratio is increased due to other reasons, resulting in the increase of shrinkage when the concrete is hardened, and the structure has network or irregular cracks of different length. 2、 The concrete mixing and transportation time is too long If the concrete is mixed and transported for a long time, the water will evaporate too much, resulting in low slump of concrete and irregular shrinkage cracks. 3、 Formwork operation is not standardized The rigidity of the formwork is insufficient. When pouring concrete, due to the effect of lateral pressure, the formwork is deformed, resulting in cracks consistent with the deformation of the formwork. The formwork is removed too early during construction, and the concrete strength is insufficient, which causes cracks in the components under the action of dead weight or construction load. The formwork support is not compacted enough or the support stiffness is insufficient, and the support will not sink evenly after pouring concrete, resulting in cracks in the concrete. The formwork is not sprayed with enough water before pouring and is too dry. After pouring, due to the large water absorption of the formwork, the concrete shrinkage and plastic shrinkage cracks are caused. 4、 Unreasonable construction process and disordered management The construction machinery and materials shall be stacked without restriction during the construction; Do not understand the stress characteristics of the prefabricated structure, and turn over, lift, transport and install at will; Do not construct according to the design drawings, arbitrarily change the structural construction sequence and change the structural stress mode; These behaviors will produce cracks. Tread on the bound upper reinforcement randomly, and the reinforcement is bent and stepped down, which thickens the protective layer of the load-bearing reinforcement bearing the negative bending moment, resulting in the reduction of the effective height of the component, the reduction of the bearing capacity, and the formation of cracks perpendicular to the load-bearing reinforcement.

2023

03-09

Port engineering construction has entered the transition period, and the "the Belt and Road" has brought new opportunities

As an important node of the "the Belt and Road", ports play an important role in the construction of the "the Belt and Road", playing the role of "pioneers". China's port cargo throughput and container throughput have ranked first in the world for more than ten consecutive years. Supported by the rapid development of domestic ports and port trade, Chinese enterprises have continuously improved the port standardization system, improved the service capacity of the whole industrial chain, accumulated port construction, investment and operation strength, and actively invested in the construction of the "the Belt and Road".

2023

01-18

Ensure project quality and promote project construction

Zhu Chunbao, deputy secretary of the CPC Gaozhou Municipal Committee and mayor, led a team to investigate relevant key work in Shigu Town, requiring the relevant project construction entities and contractors to firmly establish safety awareness, ensure project quality, and accelerate project construction. On the same day, Zhu Chunbao visited Shigu Town Central Health Center (Gaozhou Third People's Hospital), Shigu Town Water Purification Plant Pipe Network (Phase I) and Fengshou Avenue in Shigu Town for investigation. Every time he went, Zhu Chunbao went to the construction site to inspect, carefully listen to the work report and understand the construction situation in detail. Zhu Chunbao requested that the responsible unit and construction party of Shigu Town Central Health Center should firmly establish the awareness of safe production, pay close attention to the quality of project construction, and seize the construction opportunity to speed up the project construction on the premise of ensuring production safety and quality; We should strengthen the construction management, deal with the impact of the construction site on the surrounding people, pay attention to ensuring the hospital environmental sanitation during the construction period, and provide relevant medical services; We should pay attention to grasp the development direction of the hospital, plan as early as possible, give full play to our advantages to build brand specialty, and constantly improve the medical environment of the people. The responsible unit and construction unit of the pipe network construction of the water purification plant in Shigu Town must strengthen the sense of urgency, clarify the task, attach great importance to the project construction progress, formulate the construction schedule, and speed up the construction according to the time node. Zhu Chunbao fully affirmed the construction progress of Fengshou Avenue in Shigu Town. He hoped that the government and relevant departments of Shigu Town would continue to work hard to speed up the completion of road construction, complete relevant supporting facilities and help the sound and rapid development of Shigu Town.

2023

01-18

Knowledge of the second construction project laws and regulations: classification of engineering construction standards

The time for the second-level constructor examination in 2019 is May 25-26. Are the candidates ready? Before the examination, the construction engineering education organizes the knowledge points of the second-level constructor's engineering law examination for the examinees, hoping to become the effective assistant for the examinees to prepare for the second-level constructor's examination. In 2019, the knowledge of the "Engineering Code" for the second-level constructor exam: the classification data of the engineering construction standards are ready. Come and learn! Knowledge of the second construction project laws and regulations: classification of engineering construction standards National standards, industrial standards, local standards and enterprise standards. National standards and industrial standards can be divided into mandatory standards and recommended standards. [Note] Mandatory standards (illegal), recommended standards (default). [Example · single choice] National standards and industrial standards for engineering construction can be divided into () and recommended standards. A. General standards B. Special criteria C. Recommended standards D. Mandatory standards Correct Answer D "Answer analysis" This question examines the national standards of engineering construction. National standards and industrial standards for engineering construction are divided into mandatory standards and recommended standards.

2023

01-18

Stick to the node, grasp the implementation, and go all out to promote the construction

Yesterday morning, Zhao Rulang, the deputy secretary of the district committee and head of the district, stressed that the whole district should seize every day to grasp the project construction, drive the development with big projects, keep close eye on the competition objectives, actively expand effective investment, and provide solid project support for the high-quality development of the economy and society of the whole district. Zhu Jianming, member of the Standing Committee of the District Committee and Executive Deputy District Chief, attended the inspection. Zhao Rulang and his party successively went to Huashe Street, Anchang Street and Qianqing Town to inspect the construction of price-limited houses in Keqiao City (G-50, G-51), the cultural and creative park of Kaizui Workshop in Keqiao District, the R&D, production and supply chain management of functional chemical fiber, and the manufacturing of Changtai Machinery's new energy vehicle reducer, and other project sites, to enter the site, check the details, and monitor the progress. At the project site that has been started, the construction party is seizing the sunny weather and working hard to make up for the construction period lost due to continuous rain weather in the early stage; At the project site that has not been mobilized for construction, Zhao Rulang communicated with the owner face to face to understand the difficulties and problems restricting the project construction. He pointed out that we should find more ways to overcome difficulties, and on the premise of ensuring the quality and safety of the project, we should go all out to speed up the progress and ensure the completion of this year's construction task on time. At the subsequent symposium, Zhao Rulang, after listening to the report on the competition of the first quarter of the project, pointed out that since this year, the whole region has cooperated strongly, accelerated the start and ran hard, and many projects have made a good start. He stressed that the service level should be constantly improved, and the relevant departments should strengthen the organization and coordination of project construction, plan early, strictly implement, and strive to promote the commencement and production of a number of large projects and good projects. We should focus on key industrial projects, investment promotion projects, etc., sort out the bottleneck problems that restrict the project construction, strictly supervise and inspect, strengthen coordination and linkage, increase publicity and guidance, and ensure that the project construction is advanced to a high standard. We should pay more attention to the implementation of responsibilities. On the basis of summing up the work experience and lessons of last year, we should further optimize the various mechanisms of the project competition, improve the project implementation schedule, clarify the work nodes, decompose the responsibilities and tasks, and accumulate new momentum for development. The main principals of the District Government Office, the Development and Reform Bureau, the Economic and Information Bureau, the Natural Resources Branch and the Investment Promotion Center attended the supervision and symposium.

2023

02-25

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Yazhong Construction Engineering

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+86-18662392748

Add: West of Yongda Road, Industrial Park, Dinghuo Town, Jiangdu District, Yangzhou City, Jiangsu Province, CHINA
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Phone: +86-18662392748 +86-13776432487

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