SU977176A1 - Apparatus for installing underground reinforced concrete vessels - Google Patents

Description

(54) DEVICE FOR THE ESTABLISHMENT OF UNDERGROUND CONCRETE VESSELS

one

The invention relates to equipment for the erection of underground monolithic-combined bulk structures, such as, for example, prestressed nuclear pressure vessels for nuclear power plants, sewers for sewage, etc.

A known installation for the manufacture of pre-stressed reinforced concrete volume elements, in which the external formwork panels are made of individual elements in height, each of which in the upper part is equipped with power beams and hydraulic cylinders connecting the beams to the supporting frame, and the core is made of separate shields and equipped with a mechanism to re-evaluate them 1.

However, this installation is inefficient and does not allow the manufacture of combined volume elements.

The closest to the technical essence of the present invention is a retractable formwork, comprising an outer composite cylindrical formwork shield connected by power wires with a rigid frame located inside the shield 2.

A disadvantage of the known device is its inadequacy for erection of underground monolithic combined prestressed volumetric structures, which leads to a significant increase in the duration of construction and complication of work on their construction.

5The purpose of the invention is to expand the technological capabilities of the device for the construction of underground reinforced concrete vessels.

This goal is achieved by the fact that

, 0 a device for erecting underground reinforced concrete vessels, comprising a frame and a composite formwork panel connected to it by means of power cylinders, is provided with an additional composite formwork panel, which is located

15 inside the frame and connected to it by means of power cylinders and mounting platforms mounted at the top and bottom of the frame.

The mounting platforms are equipped with a telescopic lugs mounted diagonally across the edges.

Claims (2)

To ensure the formation of vessels of various sizes, shields at the junction of their parts are provided with removable inserts, and to speed up the process of erecting the walls of the vessel, the lower platform is equipped (by external and internal parameters) with tools for mounting the composite shields with the ability to move the latter along two axes: horizontal and verticals FIG. 1 shows the proposed device in the process of erection of a structure, general view; in fig. 2 - frame device and its connection with formwork panels; in fig. 3 - design of the upper platform; in fig. 4 - design of the lower platform. The device consists of external 1 and internal 2 composite formwork panels associated with a rigid frame by means of power elements 4 and 5. The panels are made of replaceable 6 and permanent 7 segments, fastened together with locks (not shown). The position of the outer shield of the formwork of a larger diameter is indicated by the position 8. Above the frame of the cable suspension bracket 9 there is a linkage with its telescopic links 10 an upper ring-shaped platform 11, around the perimeter of which the radial controlled stops 12 are mounted. On the platform are annular tracks 13 with lifting transport mechanisms (for example, telphers) and retractable arms 14. Under the frame is mounted a lower platform 15 connected to it by telescopic connections, for example pneumatic diaphragms 16, equipped with radial packs openings 17 and suspended from the frame by cables 18. The platform includes a frame consisting of a rigid frame 19 that serves to suspend and move the lifting and transport equipment and other necessary mechanisms and devices (platform equipment 20 itself) movably connected by means of power actuators 21 and supporting outriggers 22 with a frame 19 internal arcuate segments, carrying elements of the internal composite auxiliary formwork 23 and external segments 24, bearing elements of the external composite auxiliary opal bki 25. Both formwork are mounted for vertical movement along guides 26 by the actuators 27. The platform secured composite panels - 28 screens to protect mechanisms and separate platforms during blasting in the pit. To ensure the safety of operation, all power drives are equipped with controllable piston locks 29. The operation of the device can be taken using the example of the construction of an NPP underground reactor vessel. The device is used after the completion of the construction of auxiliary shafts 30 with openings 31 using the proposed device. Necessary dimensions, cranes and tunneling mechanisms with simultaneous main pit excavation by conventional mechanisms, after which the excavation under the main vessel of the reactor vessel and its reinforcement are continued walls 32 concrete tubing. When excavating using the device, the bottom platform 15, equipped with the equipment 20, can be used to transport the produced soil to the central hole 33, through which the soil is removed before the depth of the first pit opening 31 is reached and as a mounting platform for installing tubing wall fastening 32. In this case, platform 11 serves to transport tubings and deliver concrete to fix them, while shields 7 serve as formwork itself. The upper 11 and lower 15 platforms have a size that does not exceed the diameter of the finished outer cup 34, and the size of the central hole 33 in them must be greater than the diameter of the inner cup 35. When the first mine openings 31 reach during the excavation process, the ground is removed The device is fixed at the first top level between the marks and using the stops 12 and 17 and begin to fix in the walls 32 of the cantilever beams 36 and other necessary anchoring devices (not shown), using platforms 11 and 15 for rates of necessary materials and structural elements and as mojazhnyh sites. In the process of penetration, the cantilever beams and anchors are also secured at the other underlying levels. Having completed the excavation of the pit and the fixing of its walls 32, in which the openings 37, communicating with the shafts 30, and the foundation are constructed using lifting mechanisms — the lower platform equipment 20 and the crane from the surface — install two rows of external columns 38 on the foundation the cup 34 and the inner 39 for the inner cup 35. In this case, the columns 38 are fixed rigidly with the cantilever beams 36, and the columns 39 are connected by force rings 40. At the same time, the wall 41 of the tubing 35 is arranged along the internal diameter of the cup 35. which are used as external formwork during its erection. Concreting of walls begins with the use of auxiliary shields 23 and 25 of the lower platform 15 installed on the foundation, by feeding concrete through pipes 42 and on mine lifts and compacting it with vibrators 43, which, together with their drives, are placed on the upper platform 11. Because concrete is used for concreting high grades with increased strength of grasping each of the formwork panels 23 and 25 (as well as 1-2) is preferably equal to one and a half meters, taking into account that each concrete can be laid in . After the first concrete layers of both vessels are laid, the next layer of reinforcement is installed, butt-mounted with shields 23 and 25. Boards 1 and 2 of one lower link of the molding device and concrete the second 34 and 34 inner cups, then install the next third reinforcement cages for both glasses and their concreting after butt installation with the first link of the second formwork link. To ensure prestressing, starting from the foundation and at each section prior to concreting, 45 ° C viniplast or steel pipes are installed in both directions for both cylinders, as well as prestressing reinforcing bars of all floors in the housing. Since the lower of the three completed buildings had a three-day exposure, it can be removed by moving 21 formwork segments 23, 25 by actuators and displaced upward to the schag, after having weakened (demolished) and shields 1 and 2 of the second and third part. In this case, after simultaneous movement of the entire device and securing it to a new level, the shields 23 and 25 of the lower platform will fix the second concrete blocks, and the shields of the first link - the third. The shields of the upper link in this case will be placed in the working position for concreting the next, fourth, and fourth. And so, cycle by cycle, moving the device each time to a step equal to the height of one link of the shields until the concreting of the walls of the first Rus is completed, during which the columns of the outer and inner rows will be embedded. For the device in the walls of the openings 37, prior to concreting, zakl parts are installed both on the side of the shaft 30 and on the side of the vessel. Complete the construction of the Russ device overlap. To do this, with the help of the lower platform, we arrange a shield shield formwork (not shown), fix it with support on the cantilever beams 36 and the power ring 40 of the beam 44 and the necessary prestressed reinforcement cage (not shown) and put them into concrete and pipes 42 their deep vibrators 43. Installation of subsequent Rus is carried out using the proposed device in a similar way. It should be noted that in all the rusa constructions, to ensure the subsequent installation and maintenance of the equipment during its operation, with a support on the beams 44 to the floor, the lifting mechanisms of the equipment are raised. The application of the proposed device expands the technological capabilities of erecting underground structures, allows significantly (2-3 times) to reduce the time of their construction, because it allows to combine a number of operations, such as excavation and wall fastening, installation of reinforcement cages and construction of walls of simultaneous installation of equipment in the underlying rus, etc. The device allows to mechanize almost all the work in the process of construction of the structure, which makes it more technological and reduces labor raty. Claim 1. A device for erecting underground reinforced concrete vessels, comprising a frame and a composite formwork console connected to it through power cylinders, characterized in that, in order to expand technological capabilities, it is provided with an additional composite formwork shield that is housed inside the frame and connected to it using power cylinders and mounting platforms mounted at the top and bottom of the frame. 2. A device according to claim 1, characterized in that the mounting platforms are provided with telescopic supports radially mounted along the edges. Sources of information taken into account in the examination 1. USSR author's certificate number 720804, cl. B 28 B 7/22, 1976. 2. USSR author's certificate for application No. 2544617 / 29-33, cl. B 28 B 7/22, 1977. f ah d : .z1k. jUii .. ten TO C-C 11 p 9 / L Fig.Z g / D -. .23