-
Technical disclosure of underwater concrete construction The tremie method is to insert the tremie into the hole of the bored pile for underwater concrete pouring. The lower end is about 0.4m from the bottom of the hole. The tremie is equipped with a funnel for storing concrete, and a water stop cock is set at the funnel mouth to drain the water from the tremie during the first batch of concrete pouring. When pouring, fix the water stop cock at the funnel mouth first, and store the concrete in the funnel, so that after pouring along the tremie -
Technical disclosure of underwater concrete construction of pile foundation The hoisting work shall be stopped in the following cases: 1) When the blocks and components cannot be stopped stably due to the wind; 2) The noise is too loud to hear the command signal clearly; 3) Unsafe factors of lifting equipment, rigging and clamps are not eliminated; 4) Heavy fog or insufficient lighting. -
Safety technical disclosure of underwater concrete pouring construction of cast-in-place pile foundation The equipment capacity for lifting the tremie shall be able to overcome the dead weight of the tremie and the concrete in the tremie and the bonding resistance between the inner and outer walls of the embedded part of the tremie and the concrete, and have certain safety reserves; The depth of the tremie embedded in the concrete shall comply with the technical regulations -
Safety technical disclosure of underwater concrete pouring construction of pile foundation In the process of pouring underwater concrete, measures must be taken to prevent the tremie from water ingress and blocking, pipe burying and hole collapse; In case of any of the above situations, the reason shall be identified, the operation shall be improved and handled in a timely manner. In case of serious hole collapse, the pouring of concrete must be stopped immediately, the tremie and reinforcement skeleton shall be put forward, and the backfilling shall be carried out according to the technical requirements; In case of broken pile, the treatment scheme shall be studied with the design and construction (supervision). -
Technical Disclosure of Underwater Concrete Construction of Bored Cast in place Piles of Henan Highway Bridge The framework shall be lowered slowly when entering the hole, and it is forbidden to swing and collide with the hole wall. The skeleton shall be temporarily supported on the casing opening, and then the second skeleton shall be lifted, so that the upper and lower skeletons are in the same straight line for welding. When welding, the joints along the bridge direction shall be welded first. The underwater concrete works shall be constructed using the vertical tremie method. φ 300mm quick bayonet is used to lift the tremie vertically. Each section is 2.6 long -
Safety technical disclosure for concrete pouring construction of underwater construction project of pile foundation The operation site shall be flat and solid. If the ground bearing capacity cannot meet the requirements of crane operation, the foundation must be reinforced and accepted as qualified -
Technical Scheme for Concrete Caisson Heightening and Undrained Sinking of North Anchorage of Taizhou Yangtze River Bridge Technical Scheme for Concrete Caisson Heightening and Undrained Sinking of North Anchorage of Taizhou Yangtze River Bridge -
Analysis of concrete construction technology Combined with the specific conditions of the construction site, the construction steps from shallow foundation to deep foundation are adopted, and different pouring schemes and technical measures are formulated for the cushion caps of different volumes, which effectively reduces the maximum temperature rise inside the pumped mass concrete and eliminates the cold joint phenomenon. Checkerboard type high and low level construction joints are set in the middle of the cushion cap, which has achieved good results -
Selection and construction technology of underwater cable Combined with the construction experience of underwater cable of Ezhou 35kV long beam line, this paper focuses on the selection of underwater cable and the analysis of underwater cable laying process, providing reference for the selection and construction of underwater cable. -
Slipform construction technology of shaft concrete The surge shaft and traffic shaft of hydropower station and pump house are generally high cylindrical thin-walled structures, one is concrete lined wall rock, the other is exposed thin-walled reinforced concrete cylinder. -
Talking about concrete construction technology in winter Send you an engineering data. It will be of great help to engineers and technicians. -
Technical disclosure of waterproof concrete construction Complete the acceptance of concealed inspection and pre inspection of reinforcement and formwork, and check whether the through wall bolts, equipment pipes or sleeves, construction joints and embedded parts in the waterproof concrete structure have been well waterproof during the concealed inspection and pre inspection. -
Summary of rockfill concrete construction technology Rockfill concrete technology is a new type of mass concrete construction technology developed from self compacting concrete technology, which has been applied to water conservancy projects. This paper introduces the concept, advantages and construction process of rockfill concrete construction technology, as well as its application in engineering in Germany. Simple economic and environmental impact assessment of rockfill concrete construction technology based on practical engineering experience -
Concrete construction technology of tailrace outlet (1) Be familiar with the design documents. The technical director, construction technician, safety and quality personnel, surveying personnel, etc. shall carefully study the design documents and construction drawings before construction, and conduct joint review of drawings to understand the design intent and clarify the design problems found. (2) In combination with the construction characteristics of the project, practical construction organization measures and plans shall be prepared and submitted to the supervising engineer for approval before implementation. -
Technical disclosure of concrete construction in Kunming When pouring concrete, the upper layer concrete shall be poured before the lower layer concrete is initially set or can be reshaped. When the upper and lower layers are poured at the same time, the distance between the upper layer and the lower layer before and after pouring shall be more than 1.5m -
Technical disclosure of a concrete construction in Chongqing When pouring concrete on the slope, the concrete shall be expanded and raised layer by layer from the bottom, while maintaining horizontal layering; The concrete layer thickness should not exceed 30cm. -
Technical disclosure of a concrete construction in Qingdao The formwork, reinforcement and embedded parts shall not be collided during mechanical vibration. The vibration duration of each vibration point is 20~30s, and the concrete will not sink, no bubbles will appear, and the surface will show laitance. -
Technical disclosure of concrete construction in Qitai The bending radius of the flexible shaft of the immersion vibrator shall not be less than 50cm, and shall not be more than two bends. During operation, the vibrating rod shall sink into the concrete naturally and vertically, and shall not be inserted hard or pushed obliquely. When pulling out, it shall be pulled out slowly and vertically to bring out bubbles, and shall not be completely inserted into the concrete. (4) The vibrator shall be kept clean, and there shall be no concrete stuck on the motor shell to prevent heat dissipation. -
Technical disclosure record of concrete construction Concrete curing includes natural curing and steam curing. During concrete curing, it is necessary to focus on strengthening the control of concrete humidity and temperature, minimize the exposure time of surface concrete, and timely cover the exposed surface of concrete closely (tarpaulin, plastic cloth, etc. can be used to cover) to prevent surface moisture evaporation. Before the initial setting of the concrete for the protective layer of the exposed surface, the cover shall be rolled up and -
Technical record of concrete disclosure construction Steam curing of concrete can be divided into four stages: static stop, temperature rise, constant temperature and temperature drop. The ambient temperature shall not be lower than 5 ℃ during the static stop, and the temperature can be raised after 4~6h of pouring and final setting of concrete. The heating rate should not be greater than 10 ℃/h. During constant temperature period, the internal temperature of concrete shall not exceed 60 ℃, and the maximum temperature shall not exceed 65 ℃. Constant temperature curing time shall be based on the strength of component demoulding -
Technical disclosure of concrete construction After the surface covering of concrete is removed or the formwork is removed, the concrete shall be wet cured by water storage, watering or covering sprinkling. When the concrete surface is wet, it can also be quickly wrapped with burlap, straw curtain and other moisturizing materials. During the wrapping, the wrappings shall be intact, lapped with each other completely, and the inner surface shall have condensation drops. Concrete shall be extended as far as possible in conditional sections -
Technical disclosure of structural concrete construction Operation conditions: (1) Complete the backfilling of outdoor and room core, and install the trench cover plate. (2) The concealed inspection procedures for foundation and foundation works have been completed. (3) Plaster the cement mortar damp proof course according to the elevation. (4) Snap the axis wall body line, pop up the door and window position line according to the actual specification and size of the incoming brick, and the experience line meets the design requirements, and complete the pre inspection procedures. （5 -
Technical disclosure of roller compacted concrete construction The excavated earthwork shall be stacked in strict accordance with the organization design, and shall not be stacked outside the foundation pit, so as to avoid causing soil displacement, sheet pile displacement or support damage due to ground surcharge. -
Lesson 21 - Concrete Construction Technology Lecture 21 - Concrete construction technology, detailed for reference -
New concrete construction technical scheme 1. Get familiar with the drawings, the technical director shall organize the reinforcement foreman, the quality director and the construction team to review the drawings, and carefully study the new specifications, atlas and quality acceptance specifications. b) Preparation of machines and tools: the specifications of the reinforcement in this project are relatively complex, and the reinforcement is processed on site. It is required to set up supporting mechanical equipment: -
Technical disclosure of shotcrete construction Quality standards, technical measures, safety measures -
Technical scheme for concrete construction in winter Technical Scheme for Concrete Winter Construction.doc Technical Scheme for Concrete Winter Construction.doc Technical Scheme for Concrete Winter Construction.doc -
Technical disclosure of concrete construction in summer For concrete mixtures requiring high slump, high-efficiency water reducing agent can be considered. -
Technical disclosure of foundation concrete construction The foundation slab reinforcement and column and wall joint reinforcement shall be constructed in sections as soon as possible, and the concealed works shall be accepted. -
Technical disclosure of concrete construction in winter For the winter construction of Qingxian beam fabrication yard, the winter construction is determined according to the node construction period plan issued by the Bureau and the current construction progress. -
6 - Technical disclosure of cushion cap concrete construction 6 - Technical disclosure of cushion cap concrete construction 6 - Technical disclosure of cushion cap concrete construction 6 - Technical disclosure of cushion cap concrete construction 6 - Technical disclosure of cushion cap concrete construction 6 - Technical disclosure of cushion cap concrete construction -
3 - Technical disclosure of pier shaft concrete construction 3 - Technical disclosure of pier shaft concrete construction 3 - Technical disclosure of pier shaft concrete construction 3 - Technical disclosure of pier shaft concrete construction 3 - Technical disclosure of pier shaft concrete construction 3 - Technical disclosure of pier shaft concrete construction 3 - Technical disclosure of pier shaft concrete construction 3 - Technical disclosure of pier shaft concrete construction 3 - Technical disclosure of pier shaft concrete construction 3 - Technical disclosure of pier shaft concrete construction -
Technical disclosure data of concrete construction The center mileage of the effective platform of the station is XXXX, and the total length of the main body is XXX m. Open cut method is adopted for construction, and its structural form is a double-layer three span rectangular frame structure. The total width of the standard section is XXX m, the depth of the foundation pit is XXX m, and the thickness of the covering soil is XXX m. The width of the west side of the foundation pit of the shield end shaft section is XXX m, the average depth is XXX m, and the width of the east side is XX, the average depth is -
Technical Scheme for Vegetation Concrete Construction The rock slope concrete slope protection greening project is the construction technology of plant slope protection, which can achieve the goal of vegetation restoration, landscape improvement and environmental protection by using a special sprayer to spray evenly mixed planting base materials onto the slope surface after the construction of short bolts, three-dimensional mesh or galvanized wire mesh on the stable rock slope. It has a protective edge -
Example analysis of mass concrete construction technology For concrete structural cracks, this paper puts forward technical measures in raw material selection and mix design, concrete supply and pouring, concrete internal temperature detection and surface maintenance, etc. -
Construction technology of clear water mirror surface concrete Construction technology of clear water mirror surface concrete -
Construction technology of wet shotcrete in tunnel Construction technology of wet shotcrete in tunnel -
Construction technology of prestressed concrete box girder The installation, transportation distance and sequence of box girder shall be considered when setting the precast yard. The quantity of beam bottom depends on the actual construction period
-
one Fair faced concrete construction technology -
two Technical Paper on Concrete Construction -
three Questions and answers on concrete construction technology -
four Underwater concrete construction scheme -
five Construction technology of concrete dam -
six Construction technology of underwater shield tunnel -
seven Technical Paper on Concrete Construction -
eight Construction technology of self compacting concrete