15results about "Wall dams" patented technology

This utility model provides a structure for converting a clay core dam into an overflow dam, including a spillway excavated along the top of the clay core dam to the bottom of the downstream side. A spillway bottom slab is poured below the spillway, and side walls are poured on both sides of the spillway bottom slab. The height of the side walls is not lower than that of the clay core dam on both sides. An overflow weir is poured on the spillway bottom slab, and the overflow weir is located in the direction of the top of the clay core dam. The two sides of the overflow weir are connected to the side walls, and the height of the overflow weir is lower than that of the clay core dam on both sides. An anti-seepage wall is embedded in the clay core dam below the overflow weir. The overflow dam is converted on the clay core dam to ensure that the converted clay core dam has a certain discharge capacity, thereby enhancing the flood control capacity of the reservoir.

The invention discloses an alpine region asphalt core wall base and copper water stop strip collaborative anchoring and interface anti-seepage construction method, and relates to the technical field of hydraulic engineering, the method comprises the following specific steps: construction preparation and pretreatment: flushing and cleaning a dam foundation rock surface and an anti-seepage wall concrete surface in a corresponding range of a base; according to the method, through multi-layer interface treatment and rolling control, an anti-seepage structure adaptive to the low-temperature environment is successfully constructed, after the base concrete is cured, the periphery of the water stop piece is brushed with asphalt mastic, the top face of the base is preheated before an asphalt core wall is paved, and then the asphalt core wall is paved, so that the anti-seepage structure adaptive to the low-temperature environment is constructed; according to the method, the initial grinding temperature and the final grinding temperature of the asphalt mixture are controlled, and the two sides of the axis of the water stop strip are rolled through specific vibration rollers, so that the problems that microcracks are generated due to low-temperature shrinkage of an interface and crack propagation is aggravated due to the freezing and thawing cycle effect are effectively solved, and long-acting seepage prevention is achieved.

The invention particularly discloses an overwintering and long-interval interlayer anti-seepage treatment method for an asphalt concrete core wall dam in a severe cold area. Aiming at the technical defects of poor interlayer combination and easy formation of a leakage channel caused by low-temperature freezing and thawing and long-interval construction in the wintering period of an asphalt concrete core wall dam in severe cold and high latitude areas, the construction method comprises the following steps: bottom layer pouring transformation before wintering / long interval, concave groove forming and two-cloth and one-membrane geotextile embedding; and the steps of interface pretreatment after overwintering / long interval, upper asphalt concrete pouring and wrapping, rolling compaction and the like are conducted, and the sandwich type water stop structure of bottom layer concrete-two-cloth-one-membrane geotechnical cloth-upper layer concrete is formed. According to the method, the seepage path length is prolonged, the seepage-proofing reliability is improved, the method is suitable for overwintering and long-interval interlayer seepage-proofing treatment of asphalt concrete core wall dams in various severe cold areas, the method has the advantages of being wide in adaptability, easy and convenient to construct, high in durability and the like, the interlayer stripping seepage problem which is difficult to deal with in the traditional technology is effectively solved, and the long-term seepage-proofing safety of the dam body is guaranteed.

A high-pressure jet grouting construction method for a concrete cutoff wall for a dam, comprising the following steps: S1, determining a cutoff wall method; S2, determining a cutoff wall location; S3, optimizing a cutoff wall construction procedure; and S4, performing cutoff wall joint treatment. The construction method employs a series of operations to determine whether a cutoff wall method is feasible; extending a seepage path to reduce a hydraulic gradient when the hydraulic gradient does not meet requirements; optimizing a cutoff wall location by moving the cutoff wall to an upstream side of a dam body; constructing the dam body and the cutoff wall at the same time without mutual interference to accelerate construction progress; and performing cutoff wall cap casting before constructing the high-pressure jet grouting cutoff wall, thereby saving time spent on working platform excavation and secondary backfill, saving construction costs, and reducing the duration of construction.

In a method for relieving the pressure on a main dam (1) of a dam assembly (13), wherein the dam assembly (13) comprises a main dam (1) for impounding a reservoir, a relief wall (5) is constructed downstream of the main dam (1), which has a lower height than the main dam (1), wherein a relief lake (6) is formed between the main dam (1) and the relief wall (5) such that the resulting hydrostatic pressure forces on the main dam (1) are reduced.

The invention relates to the technical field of hydraulic engineering construction, and discloses a geomembrane inclined wall dam slope surface slope rolling construction technology which comprises the steps that fine brushing treatment is sequentially conducted on a dam slope surface, the reserved settlement thickness is determined in combination with a rolling test, and after cushion materials are laid, a slope roller driven by dam crest traction equipment is adopted for vibration rolling. Vibration is started during uphill to realize effective compaction, and vibration is stopped during downhill to prevent equipment from slipping; and finally, a geomembrane is laid on the qualified cushion layer. According to the process, directional vibration control and traction type operation are combined, so that the compaction uniformity, the surface flatness and the construction safety of a cushion material under the high and steep slope condition are improved, and a stable and reliable anti-seepage foundation is provided for a geomembrane.

The application discloses an anti-seepage structure system, in particular to an anti-seepage structure system for a concrete dam on a covering layer foundation, and belongs to the technical field of water conservancy and hydropower engineering structure design and manufacturing. The application provides an anti-seepage structure system for a concrete dam on a covering layer foundation, which can be widely applied to various permanent anti-seepage wall constructions and has a small construction scene. The anti-seepage structure system comprises a concrete dam body and an anti-seepage structure, and further comprises an elastic buffering anti-seepage connecting structure; the anti-seepage structure in the covering layer is connected with the concrete dam body on the covering layer through the elastic buffering anti-seepage connecting structure to form an integral whole.

A dam construction steel formwork with an anti-cracking effect and a cooling control system comprise a steel formwork 10 and a cooling water spray head 20, and the steel formwork 10 is a concrete pouring formwork arranged on the upstream face of a concrete dam. The control system detects the temperature of each cooling area of the steel formwork in real time, detects the temperature of a cooling water source, detects the environment temperature, the wind speed and the solar radiation intensity of a dam construction site, and takes the parameters as boundary conditions of finite element calculation; the control system detects the dynamic irradiation area of the sun on the steel formwork, detects the temperature gradient in dam concrete, calculates the water flow needed by cooling of the steel formwork, and controls the cooling water spray head 20 to spray cooling water to the cooling area 11. A plurality of independent partitioned cooling areas are arranged, and temperature control of the steel formwork is accurately adjusted, so that the concrete temperature peak value is reduced, internal and external temperature difference stress is reduced, and the anti-cracking purpose is 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 utility model relates to the technical field of dam body seepage prevention and water stop, and discloses a concrete dam body joint seepage prevention self-adaption water stop belt which comprises an outer plate, the inner bottom wall of the outer plate is fixedly connected with a thermoplastic elastic layer, the top wall of the thermoplastic elastic layer is fixedly connected with an anti-tearing layer, and the top wall of the anti-tearing layer is fixedly connected with a waterproof layer. A plurality of high-strength rubber strips are fixedly connected to the front side of the inner wall of the anti-tearing layer at equal intervals, a plurality of connecting ribs are fixedly connected to the left side of the inner wall of the anti-tearing layer, a gel plate is fixedly connected to the top wall of the anti-tearing layer, and a weather-proof mechanism is arranged on the top wall of the gel plate and used for improving the weather resistance of the water stop belt. According to the utility model, the thermoplastic elastic layer is used as the base layer of the water-stop belt, so that the deformation adaptability of the water-stop belt is improved, the water-stop belt can be deformed along with the deformation of a dam body, the water-stop effect is kept, and then under the connection of the tear-resistant layer, the situation of local damage or aging cracking caused by the external influence is reduced.

The utility model discloses a slope twisted surface dam anti-seepage plate slip form device which comprises a plurality of I-shaped steel guide rails which are arranged at intervals in the width direction of an anti-seepage plate, and the extending direction of the I-shaped steel guide rails is parallel to the extending direction of an X line of a toe board. Each I-shaped steel guide rail is suspended and fixed above the foundation surface of the anti-seepage plate through a plurality of anchor rods which are arranged at intervals along the extension direction of the I-shaped steel guide rail; the formwork mechanism comprises side formworks vertically arranged on the two sides of the foundation surface of the anti-seepage plate and a panel which is in lap joint with the tops of the two side formworks in a sliding mode, a reinforcing framework is welded and fixed to the upper surface of the panel, and a traction mechanism is connected to the reinforcing framework; the guide sliding mechanism comprises a plurality of sliding assemblies arranged at the top end and the bottom end of the upper surface of the reinforcing framework in groups, and the sliding assemblies are matched with the guide rails to guide the whole panel to slide in the extending direction of the guide rails.

The utility model discloses a distribution structure for pouring and concrete conveying of a dam abutment on the side edge of a dam body. The distribution structure comprises a concrete chute capable of conveying concrete; and the supporting frame assembly is used for stably supporting the concrete chute. The pulling and binding rings penetrate through the annular holes in the different sections of the concrete chute, the two ends of the pulling and binding rings are fixed to the vertical rods in a sleeving mode, when a concrete transporting vehicle on a transportation road pours concrete into the concrete chute on the slope face, the pulling and binding rings on the different sections of the concrete chute can disperse and transmit impact to the slope face through the vertical rods, and the problem that when a large amount of concrete is transported, the impact is caused is solved. And broken stones in the concrete can impact the chute surface, so that the installation state of the concrete chute is unstable.

The utility model discloses a stepped debris flow silt arrester which comprises a dam body foundation, a dam body main body, stepped water retaining strips and drainage holes. The dam body main body is fixedly connected to the upper surface of the dam body foundation, and a step structure is arranged on the downstream face of the dam body main body; the two stepped water retaining strips are arranged side by side and fixedly connected to the upper surface of the dam body foundation, and the stepped structure is located between the two stepped water retaining strips. The drain hole is formed in the side wall of the dam main body in a penetrating manner, and the drain hole penetrates through the step structure; wherein the top surface of the stepped water retaining strip is an inclined surface. The silt arrester can reduce the flow speed of debris flow, dissipate part of energy of the debris flow, buffer impact force of the debris flow and dimension stones, enhance the stability of the dam body, reduce the erosion effect of the surrounding of the dam body caused by diffusion of the overflowed debris flow concentrated on the stepped structure, and prolong the service life of the silt arrester.

The invention discloses a cemented sand gravel dam construction material. The construction material is used for construction of a main dam section of a cemented sand gravel dam and comprises the following components in proportion: 100 parts of water, 65 parts of cement, 65 parts of fly ash, 1670 parts of aggregate C2, 450 parts of A2 sand and 1.3 parts of a special additive, the sand ratio is 21.2%, the water-binder ratio is 0.77, the VC value is 2.0 s, and the aggregate is obtained by dividing an excavation material of a road or dam excavation waste material according to rock strength, removing impurities larger than 150 mm and processing.