35 results about "Roller-compacted concrete" patented technology

The application discloses a concrete production method, comprising the following steps: step 1, determining the quantity of materials needed to be added to ordinary concrete according to the required compressive strength of the roller compacted concrete; step 2, sequentially adding the required materials into the ordinary concrete and performing roller compacting mixing in the concrete; step 3, adding an admixture into the concrete obtained in step 2 through a low-temperature high-pressure spraying mixing mode; and step 4, adding asphalt into the concrete obtained in step 3 and uniformly mixing to obtain the roller compacted concrete. Further, the materials comprise stone powder, fly ash and pozzolanic admixture. The application increases the hardness and compressive strength of the ordinary concrete through material adding and process treatment, so that the roller compacted concrete can be produced on site when the demand is small, and factory ordering is not needed, thereby saving the construction cost.

This invention discloses a method, system, and equipment for identifying the construction progress of roller-compacted concrete dam surfaces: It acquires multi-camera video of the roller-compacted concrete dam surface, performs time synchronization, camera calibration, coordinate unification, regional modeling, and rasterization, and preprocesses the surface video; it detects, identifies, segments, and tracks construction equipment targets and surface conditions, mapping machine trajectories and work footprints to the construction plane, thereby completing statistical analysis of coverage area, number of compaction passes, dwell time, compliance status, and abnormal events; it calculates construction progress and efficiency indicators, compares them with the plan, and outputs progress diagnosis results, early warning information, scheduling suggestions, and report interface data. This invention utilizes on-site monitoring video, improving robustness under complex lighting, occlusion, and dust conditions through multi-camera spatiotemporal registration and deduplication fusion, reducing manual inspection costs, and enhancing the objectivity, timeliness, and traceability of progress perception.

The application discloses a method for precisely controlling construction quality of a roller compacted concrete interlayer, which comprises the following steps: S1, roller compacted concrete test preparation, determining a test site and a roller compacted concrete test block size, and dividing areas of the test block; S2, a roller test process, layer-by-layer rolling of the test block, and obtaining maturity results of different interlayer joints of the test block; S3, curing and coring of the roller compacted concrete test block, and obtaining test result data of the core sample; S4, analyzing tensile and compressive results of the core sample, and obtaining analysis conclusions of the tensile and compressive results of the sample; S5, according to S2 to S4, formulating control standards and treatment measures of the roller compacted concrete interlayer joints in different months; S6, in a roller compacted concrete dam construction process, corresponding treatment measures are carried out according to the control standards and treatment measures of the roller compacted concrete interlayer joints in different months; and S7, after the roller compacted concrete dam construction is completed, construction quality is checked and results are verified. The application can improve pouring quality of the roller compacted concrete.

This invention relates to a construction positioning device and method for a roller-compacted concrete dam transverse joint water-stopping system. The device includes a main frame, a positioning mechanism, and a roll-up mechanism. The main frame has panels on both its top and bottom surfaces. The positioning mechanism includes a guide sleeve, a positioning element, and fasteners. The fasteners are located on the outer wall of the guide sleeve and are used to clamp the positioning element. The roll-up mechanism includes a drum body, a rotating shaft, and a water-stopping element. The water-stopping element is located on the surface of the drum body to allow it to be embedded into a preset position as construction progresses. This device solves the problems of interference and material waste during the construction of multiple dam sections, enabling collaborative operation and green construction of the water-stopping system; it overcomes the drawbacks of traditional drainage hole construction techniques, achieving precise molding without pre-embedded pipes; and it solves the problems of chaotic on-site stacking of water-stopping materials and welding damage, ensuring the construction quality of the water-stopping system.

The invention relates to the technical field of construction of roller compacted concrete gravity dams in water conservancy and hydropower engineering, in particular to a construction method for continuous multi-dam-section rapid pouring of dam foundation cushion layer concrete of a roller compacted concrete dam. According to dam foundation cushion concrete, by means of measures of building a road in advance, directly replacing traditional bamboo plywood with asphalt cedarwood boards for formworks and the like, the situation that in the conventional pouring process, damage and pollution are caused to a dam section foundation surface due to the fact that an automobile enters a warehouse through adjacent dam sections, and then the foundation surface is cleaned repeatedly is reduced; compared with the tedious procedures of one-bin cleaning, one-bin checking and accepting, one-bin pouring and one-bin re-cleaning circulation in the prior art, the pouring efficiency of the low-slump distorted concrete of the dam foundation cushion layers of the adjacent dam sections is greatly improved, and the rapid and continuous pouring construction method is formed.

The utility model discloses a roller compacted concrete nucleon density instrument measuring hole forming device which comprises a drill rod (3) used for forming holes and an electric hammer (1), the power output end of the electric hammer is provided with a drill rod clamping system (4), the drill rod clamping system is connected with the drill rod through a quick release connector, the lower end of the drill rod is provided with an elliptic hammer head, and the elliptic hammer head is connected with the electric hammer. The electric hammer is further provided with an infrared distance meter used for automatically measuring the hole opening depth. According to the utility model, the drill rod can be driven by the electric hammer to rotate so as to realize the electric forming of the measuring hole on the roller compacted concrete, so that the hole opening efficiency is greatly improved, the depth of the measuring hole can be accurately controlled, the disturbance to the roller compacted concrete is small, and the compactness of the roller compacted concrete can be more truly detected.

The application discloses a metamorphic concrete and roller compacted concrete joint quality identification method, system and equipment based on a ground penetrating radar. One-dimensional original waveform data of a metamorphic concrete and roller compacted concrete joint position is obtained by using a ground penetrating radar. After data preprocessing, noise waveform data is obtained. The noise waveform data and the original waveform data are integrated into a data set after being uniformly labeled. The data set is divided into a training set, a validation set and a test set. Based on the training set and the validation set, a DNFN model is used to construct and train a concrete joint quality identification model. The trained concrete joint quality identification model is used to infer and predict the data in the test set to determine whether the metamorphic concrete and roller compacted concrete joint position quality is qualified or unqualified. The application can quickly, accurately and non-destructively identify whether the joint position quality is qualified or unqualified, thereby providing reliable technical support for engineering quality control.

The utility model discloses a dump truck discharging aggregate separation prevention device for roller compacted concrete construction, and belongs to the technical field of concrete construction. The utility model relates to a dump truck unloading aggregate separation prevention device for roller compacted concrete construction. The dump truck unloading aggregate separation prevention device comprises a material guide assembly which is assembled at the tail part of a carriage and is used for reducing the unloading height difference. According to the aggregate separation prevention device, aggregate separation is effectively prevented, by additionally arranging the aggregate separation prevention device, the discharging height difference is reduced, the aggregate separation phenomenon of the three-graded roller compacted concrete is remarkably reduced, and the uniformity of the concrete is improved; the influence of aggregate separation on the compactness and strength of the roller compacted concrete is avoided, and the engineering quality is ensured; the device is simple in structure and convenient to operate, and extra manual intervention is not needed; and the method is suitable for various hydraulic and hydro-power engineering roller compacted concrete construction scenes, and has wide popularization and application values.

The invention discloses automatic spraying equipment for roller compacted concrete dam interlayer treatment materials, and relates to the technical field of roller compacted concrete dam construction, the automatic spraying equipment comprises a slurry storage tank, a sprayer arranged at one end, a fixing frame and a containing cylinder arranged on the slurry storage tank, the top of the containing cylinder is connected with the slurry storage tank, and a cavity is formed in the fixing frame; a first connecting pipe and a second connecting pipe are arranged in the cavity, the first connecting pipe and the second connecting pipe are attached to the inner wall of the cavity, and one end of the first connecting pipe and one end of the second connecting pipe are connected with the containing cylinder; according to the device, when cement paste is conveyed to the containing cylinder, the segregation condition is detected through a microwave moisture meter probe, if indexes are met, the switching assembly closes one connecting pipe and opens the other connecting pipe, the cement paste directly enters the sprayer, if segregation is serious, the other connecting pipe is switched, the pressing roller is started to peripherally extrude the pipe, the water flow speed is reduced, and the cement paste is separated. And the separated particles and water converge and permeate in the pipe and then are discharged into the sprayer to be sprayed out.

This invention discloses a roller-compacted concrete conveying system, including an upper unloading platform, a lower receiving platform, and a pipeline. The pipeline is located between the upper unloading platform and the lower receiving platform. A storage hopper is provided on the upper unloading platform. The upper end of the pipeline is connected to the storage hopper via an upper valve, and the lower end of the pipeline is provided with a lower valve. A material level detection mechanism is provided on the storage hopper. The roller-compacted concrete conveying system also includes a concrete transport vehicle, a silo transfer vehicle, a control center, and a material detection mechanism for detecting the material quantity in the concrete transport vehicle. The material level detection mechanism, the upper valve, the lower valve, the concrete transport vehicle, the silo transfer vehicle, and the material detection mechanism are all connected to the control center. A roller-compacted concrete conveying method is also disclosed, using the roller-compacted concrete conveying system. This roller-compacted concrete conveying system and method can ensure good concrete quality, good coordination, high automation, and high overall efficiency.

The utility model provides a fog gun machine installation platform based on a dam body slope. The fog gun machine installation platform comprises a slope steel formwork, an installation platform body and platform supporting legs. The slope steel formwork is used for forming the slope of the roller compacted concrete dam, in the supporting state, a supporting part is arranged at the highest point of a formwork support of the slope steel formwork, and two hinge parts are arranged at the point, closest to the bin face of the roller compacted concrete dam, of the formwork support of the slope steel formwork. The two platform supporting legs are located on the same side of the mounting platform, and the bottom ends of the two platform supporting legs are hinged to the hinge part; the main body part of the mounting platform can rotate around the hinge part, and when the mounting platform rotates to a horizontal state, the lower end face of the main body part of the mounting platform is supported on the supporting part. The installation platform has the advantages that the slope steel formwork is used as a support, and the operation space of the dam body bin face is not occupied.

This invention discloses a method, system, and device for resource identification of roller-compacted concrete dam surfaces based on YOLOv10: The method involves acquiring a real-time video stream of the roller-compacted concrete dam surface; standardizing and enhancing each frame after frame decomposition to obtain enhanced surface images; defining resource target identification categories for the roller-compacted concrete dam surface, refining the surface images to obtain labeled images, and constructing a dedicated dataset for roller-compacted concrete dam surface resources; building and training a deeply optimized roller-compacted concrete dam surface resource identification model using the YOLOv10 model; using this model to infer the real-time video stream of the roller-compacted concrete dam surface, and post-processing the inference results using a spatiotemporally correlated target tracking algorithm to obtain structured resource information. This invention, through deep optimization of the YOLOv10 framework, specifically addresses the challenges of resource identification under multi-scale, dense occlusion, and strong background interference in RCCD surface scenarios, thereby achieving automated, accurate, and real-time monitoring of all construction elements.

The invention discloses a roller compacted concrete slurry adding modification construction homogeneity cooperative control device, which comprises a slurry metering module for calculating the output quantity of modified slurry according to a pouring rate, aggregate grading data and a slurry water-cement ratio; the compaction degree calculation module is used for calculating the compaction degree of the concrete according to the exciting force, the rolling depth and the rolling times; the detection module is used for generating a compactness distribution three-dimensional map; the control module is used for comparing the output quantity of the modified slurry with the output quantity of a preset adjustment instruction and generating a first correction strategy according to a comparison result; the compaction degree of the concrete is compared with a preset compaction degree threshold value, and a second correction strategy is generated according to a comparison result; and determining a to-be-adjusted area according to the compactness distribution three-dimensional map, generating an adjustment instruction of the to-be-adjusted area, and sending the adjustment instruction to the slurry metering module and the compactness calculation module. Accurate slurry metering control and compactness control are achieved, and timeliness and accuracy of construction adjustment are improved based on precise compactness detection.

The utility model discloses a test device for detecting the VC value of roller compacted concrete, and belongs to the technical field of concrete construction. Comprising a ring body and a pressing plate arranged in the ring body from top to bottom. A vibration motor is arranged on the pressing plate; the pressing plate is further provided with a plurality of balancing weights. According to the test device for detecting the VC value of the roller compacted concrete, the problem that the Veibog consistometer needs to be mounted at a fixed place is solved; a traditional test mode is subverted, and the device is adjusted to be in an upper vibration state, so that the whole device becomes a portable instrument.

The invention discloses a roller compacted concrete dam interlayer combination construction method, which relates to the technical field of dam interlayer combination construction, and comprises the steps of interlayer joint maturity judgment, cold joint pretreatment, slurry adding treatment and roller compacted concrete paving. Dividing a hot seam, a warm seam and a cold seam by calculating the correction maturity (the integral of environment temperature and exposure time), wherein the hot seam is free from treatment, the warm seam is directly added with slurry, the cold seam is flushed by a high-pressure water gun (the pressure is greater than or equal to 15MPa, and the aggregate exposure rate is greater than or equal to 80%), and slurry is added after cleaning; 42.5 ordinary Portland cement is adopted for preparing cement paste with the water-binder ratio of 0.55-0.65, 8-12 kg / m of cement paste is sprayed, and paving (the uniformity error is smaller than or equal to + / -5%) and rolling (the number of times is larger than or equal to 8) of the next layer are completed within 3 hours; the method is standard in process, easy and convenient to operate, capable of remarkably improving interlayer bonding strength and dam impermeability and saving construction cost, suitable for roller compacted concrete gravity dams and particularly suitable for complex working conditions such as long-time construction joints and inclined warehousing roads.

The utility model provides a permafrost region runway foundation which comprises a foundation pit, a first rubble layer and a second rubble layer are arranged in the foundation pit in a replacement mode, the first rubble layer is located above the second rubble layer, a concrete layer is arranged between the first rubble layer and the second rubble layer, and a bidirectional geogrid is arranged in the first rubble layer. The utility model has the following beneficial effects: according to the foundation treatment measure of the permafrost region runway foundation replacement method, after the frost heaving and thaw collapse foundation soil is excavated, the non-frost heaving and thaw collapse block gravel material is backfilled, so that the problems of frost heaving and thaw collapse of the soil of the permafrost region runway foundation thaw collapse foundation can be solved; meanwhile, the deformation coordination measure of the double-layer geogrid and the roller compacted concrete layer is adopted, it is ensured that post-construction settlement and differential settlement of the runway can meet the safe use requirement, the adverse effect of underground water on frozen soil of a runway base is prevented with the assistance of the composite geomembrane anti-seepage measure and the foundation pit side wall transverse drainage blind ditch measure, and certain practical significance and popularization value are achieved.

The utility model discloses an assembly type protective barrier for edge protection of a roller compacted concrete dam bin face, which comprises poured roller compacted concrete and roller compacted concrete to be poured in a dam body of a dam, two sides of the roller compacted concrete to be poured are provided with turning and lifting steel formworks, the bottoms of the turning and lifting steel formworks are fixed with the dam body, and the bottom of the turning and lifting steel formworks is fixed with the dam body. The inner side of the turning and lifting formwork is fixed through diagonal draw bars, an assembly type protective fence is arranged above the turning and lifting steel formwork and arranged along roller compacted concrete to be poured, the turning and lifting steel formwork comprises fixing rods arranged on the two sides in parallel, the fixing rods on the inner side are provided with supporting steel plates making contact with the concrete, and the supporting steel plates are arranged on the fixing rods on the outer side of the turning and lifting steel formwork. A plurality of inclined reinforcing beams are arranged between the fixing rods on the two sides; according to the assembly type protective barrier for edge protection of the roller compacted concrete dam bin face, the high-altitude edge operation risk can be eliminated on the dam bin face, the overall structure is stable, assembly is convenient, manual vibration can be assisted through the protective barrier, the physical strength of workers can be saved, and the assembly type protective barrier is suitable for application and popularization.

The invention discloses an air entraining agent for roller compacted concrete and a preparation method of the air entraining agent. The air entraining agent is prepared by compounding an air entraining component A, an air stabilizing and enhancing component B and a sensitivity reducing component C according to the weight part ratio of (450-550): (250-350): (100-300). The air entraining component A is prepared through esterification and quaternization of modified rosin, the air stabilizing and enhancing component B is prepared by dispersing nano silicon dioxide and the like, and the sensitivity reducing component C is a multi-surfactant compound system. Through the synergistic effect of the three components, the problems that a conventional air entraining agent is poor in air entraining effect in roller compacted concrete, bubbles are prone to being damaged, and the air content is sensitive to the VC value are solved, the freezing resistance and impermeability of the concrete can be remarkably improved, the early and later compressive strength is guaranteed, and the air entraining agent is suitable for construction of water conservancy dam bodies in high-altitude severe cold areas and has good practicability and popularization value.

The utility model provides a fog gun machine mounting platform fixed on a roller compacted concrete dam straight surface template. The fog gun machine mounting platform comprises a cantilever turning and lifting steel template, platform supporting legs, platform vertical rods, platform tie bars and a platform panel, the cantilever turning and lifting steel formwork is a necessary steel formwork for roller compacted concrete dam construction, and a lug part is arranged at the top end of a back main beam truss of the cantilever turning and lifting steel formwork. Hinge holes are formed in the positions, corresponding to the lug parts, of the bottom ends of the platform supporting legs. The bottom ends of the platform supporting legs are installed on the cantilever overturning and lifting steel formwork in a hinged mode through the hinge holes and the lug parts. The platform vertical rods and the platform tie bars are spliced and welded to form a platform frame surrounding the tops of the platform supporting legs. The platform panel is installed at the lower end of the platform frame and used for placing the fog gun machine. The platform has the advantages that the fog gun mounting requirement of the roller compacted concrete dam can be met, and the space of a dam bin surface is not occupied.

The invention provides a composite modified air entraining agent, high-freezing-resistance roller compacted concrete suitable for a low-air-pressure and large-temperature-difference environment and a preparation method of the high-freezing-resistance roller compacted concrete, and belongs to the technical field of building materials. The concrete is prepared from 60 to 76 parts by mass of cement, 85 to 119 parts by mass of fly ash, 720 to 736 parts by mass of sand, 1420 to 1426 parts by mass of stone, 0.02 to 0.08 part by mass of a composite modified air entraining agent, 0.5 to 0.7 part by mass of a naphthalene-based superplasticizer and 80 to 96 parts by mass of water through a specific rolling process. A special composite modified air entraining agent is adopted, sodium abietate and triterpenoid saponin synergistically and efficiently entrain air, gelatin and hydroxypropyl methyl cellulose are innovatively introduced to form a composite foam stabilizing system, and the stability of bubbles under low air pressure and severe temperature difference is remarkably enhanced; and an optimized hole structure mainly comprising harmless holes and less-harmful holes is formed in the concrete.

The invention discloses a construction road arrangement method for alternative warehousing of a left bank and a right bank of a roller compacted concrete dam, which comprises the following steps: after dam roller compacted concrete is poured to a construction road height of a corresponding elevation, continuing to use the elevation road for warehousing, and reserving a slope road between the elevation road and a road connection dam section; along with layer-by-layer pouring and rising of the dam far away from the road connection dam section, the dam enters a dam bin surface from a high-elevation construction road on one side of the opposite bank and enters the bin surface of the connection dam section for layer-by-layer pouring through the slope road, and all the dam sections which are not poured due to the reserved slope road are completed; and the dam is completely poured to be flush with the high-elevation construction road on one side of the opposite bank. And finally, the same method is adopted, and the left bank and the right bank alternately circulate until the dam crest elevation is reached. Filling and heightening construction does not need to be conducted in the dam roller compacted concrete pouring period, the warehousing road filling cost is saved, and the problem that warehousing road filling and heightening are difficult is solved.

The invention discloses an automatic roller compacted concrete Vitro consistency detection system, which comprises a mechanical execution module, an intelligent control and data acquisition module and an error compensation module, and is characterized in that the mechanical execution module and the intelligent control and data acquisition module are connected through mechanical coupling, and the intelligent control and data acquisition module and the error compensation module are connected through mechanical coupling. The automatic detection method comprises the following steps: S1, initializing equipment and setting parameters; s2, automatic loading and pre-compaction; s3, synchronous linkage detection and data acquisition; s4, intelligent terminal point identification and timing stop; and S5, performing error compensation and data output. Through automatic design of the mechanical execution module, manual operation is not needed, introduction of personal errors is effectively avoided, and the accuracy of a detection result is improved. And the intelligent control and data acquisition module is adopted, so that automatic completion, monitoring and real-time data acquisition of the detection process are realized, errors caused by manual recording in a traditional method are overcome, and the efficiency of detection work and the accuracy of data are improved.

This invention discloses a roller-compacted concrete (RCC) for hydraulic engineering and its preparation method, belonging to the field of concrete technology. The RCC for hydraulic engineering of this invention incorporates a basalt fiber-modified micro-expansion component. The preparation method of the basalt fiber-modified micro-expansion component involves cutting basalt fibers into 6-12mm fibers, dry-mixing them uniformly with steel slag powder and magnesium oxide expanding agent, and then spraying emulsified asphalt for surface coating and granulation. This invention's RCC for hydraulic engineering avoids cracking by innovatively adding the basalt fiber-modified micro-expansion component. Simultaneously, this RCC meets the actual needs of hydraulic engineering, exhibiting high compressive strength, good crack resistance, high durability, and high reliability.

The application discloses a roller compacted concrete layer surface treatment method, comprising the following steps: detecting the layer surface hardness and hydration degree of the lower layer of the roller compacted concrete; when the layer surface hardness is greater than 5 mm and the hydration degree is less than 0.8, the layer surface treatment mode adopts inserting and tamping and water spraying; when the layer surface hardness is not greater than 5 mm and the hydration degree is not less than 0.8, the layer surface treatment mode adopts brushing, water spraying after cleaning and laying an intermediate cushion mixture. The application proposes a specific and accurate lower layer construction surface state control method and evaluation index in view of the lack of scientificity and accuracy of the current roller compacted concrete lower layer construction surface state evaluation index and the complexity of the on-site construction condition, improves the layer surface bonding strength, stability and durability and the like, and solves the problems of poor scientificity, accuracy, economy and effectiveness of the current roller compacted concrete layer surface treatment method.

The invention discloses a heat and moisture preservation system and method for a roller compacted concrete dam in a high-altitude and alpine region, belongs to the technical field of dam construction of water conservancy and hydropower engineering, and aims to solve the problems of freeze-thaw damage and dry shrinkage cracking of concrete in an extreme environment and low efficiency, poor adaptability and the like of traditional protection. The system comprises a composite intelligent heat preservation and moisture preservation blanket, an intelligent environment perception and regulation system, an efficient spraying moisture preservation system and an automatic rolling and paving device. The heat preservation and moisture preservation blanket is formed by compounding an outer protective layer, a main heat preservation layer, a phase change temperature adjustment layer and an inner moisture preservation layer, and a low-temperature-resistant sensor network is embedded in the heat preservation and moisture preservation blanket. The central control unit is in communication / electric connection with the sensor network and the spraying system adjustable nozzle to realize dynamic regulation and control; the automatic rolling and paving vehicle realizes efficient paving and recycling of the blanket body. According to the method, through automatic covering, temperature, humidity and environmental parameters are monitored in real time, the moisture permeability of the moisturizing layer is adjusted in a linkage mode or spraying water replenishing is started, the temperature difference is stabilized, and long-acting moisturizing is achieved. The system integrates covering, monitoring and regulating functions, and the construction efficiency and the early strength and durability of the dam are improved.

The application provides a composite modified air entraining agent and high frost resistance roller compacted concrete suitable for low air pressure and large temperature difference environment and a preparation method thereof, and belongs to the technical field of building materials. The concrete is prepared from cement with a mass fraction of 60-76 parts, fly ash with a mass fraction of 85-119 parts, sand with a mass fraction of 720-736 parts, stone with a mass fraction of 1420-1426 parts, the composite modified air entraining agent with a mass fraction of 0.02-0.08 parts, the naphthalene-based high efficient water reducing agent with a mass fraction of 0.5-0.7 parts and water with a mass fraction of 80-96 parts through a specific roller compacting process. A special composite modified air entraining agent is used, the air entraining agent cooperatively and efficiently entrains air by sodium abietate and triterpenoid saponin, and gelatin and hydroxypropyl methyl cellulose are innovatively introduced to form a composite foam stabilizing system, the stability of the air bubbles under low air pressure and severe temperature difference is significantly enhanced, and an optimized pore structure with harmless pores and less harmful pores is formed in the concrete.

The application relates to the technical field of water conservancy and hydropower engineering, in particular to a roller compacted concrete gravity dam in a strong earthquake area, which comprises a dam body and a consolidated grouting base layer, the upstream side of the dam body is provided with an upstream dam slope extending in a straight line from the dam bottom to the dam top, the slope ratio of the upstream dam slope is 1:n1, the downstream side of the dam body is provided with a downstream dam slope, the downstream dam slope comprises a vertical slope section and an inclined straight slope section, the vertical slope section extends vertically downward from the dam top, the inclined straight slope section extends in a straight line from the lower end of the vertical slope section to the dam bottom, the slope ratio of the inclined straight slope section is 1:n2, the dam bottom of the dam body is connected to the top surface of the consolidated grouting base layer, and the consolidated grouting base layer is fixed on the water bottom bedrock in a flat manner, wherein n1>=0.40 and n2>=0.90. The roller compacted concrete gravity dam in the strong earthquake area can be applied to high seismic intensity areas by making the upstream dam slope and the inclined straight slope section gentler, so that the stability of the gravity dam is improved.

The utility model belongs to the technical field of concrete impermeability tests, and discloses a roller compacted concrete bonding layer impermeability test system which comprises an impermeability cover die, a test die base, a water injection hose and an impermeability instrument. The impervious cover die is detachably connected with the test die base to define a forming cavity with an opening in the upper end; a flow guide component extending axially is vertically arranged on the test mold base, and when the flow guide component is used for manufacturing a concrete test piece in the forming cavity, a water injection channel penetrating through a test piece bonding layer is formed in the concrete test piece; one end of the water injection hose is hermetically connected with the water outlet of the anti-permeability instrument, and the other end is inserted into the water injection channel to a preset depth for applying water pressure to the test piece. According to the impermeability test system, the water injection channel is arranged in the test piece, so that injected water directly seeps from the middle layer, the influence of roller compacted concrete at the lower layer on the impermeability result is avoided, in addition, the permeation condition of the bonding layer can be directly observed through the perspective arc-shaped plate, the impermeability path is analyzed, and the impermeability performance of the bonding layer is accurately judged.