Technological map for the construction of a monolithic floor of a typical floor of a 16-storey building in the city of Saratov

4.1 Job Instruction for Arrangement of Roof Made of Welded Roll Material Linokrom

4.1.1 Scope.

The process sheet was developed for the installation of a roll carpet from three layers of Linokrom TM TU 57740021315791598 grades of KhPP and TAP for the flat roof of a large-panel multi-storey residential building with a slope of up to 5%. Roofing is manually arranged by means of gas burners.

4.1.2 Procedure and organization of works.

Roofing device is started with steam insulation device. Before the start of the steam insulation device, all materials, mechanisms must be delivered to the workplace, their operation must be checked. Joints of bearing reinforced concrete slabs are frozen, surface of uneven slabs or monolithic base is masked with cement sand mortar of grade not lower than M150.

All types of construction works on the coating must be completed before the steam insulation layer can be laid.

Vapour insulation is arranged from polyethylene film reinforced with fiberglass filaments. The places of overlap of the panels (710 cm in length and 15 cm in width of the panel) are glued together.

The heat insulation device is made in the following sequence: ceramzite is filled with lighthouse rivers, expanded ceramzite is leveled with a jumper up to 3 m.

Along the way, work is underway on the construction of a clay brace.

Upon completion of works on the attic floor, the coating plates are installed.

Before starting bracing works, it is necessary to:

- complete all types of installation works on the coating;

- install metal compressors in places of deformation joints arrangement, supply water, prepare mechanisms, tools, accessories.

Cement-sand mortar is prepared centrally. Laying of cement mortar with a layer of up to 40 mm along the expanded clay layer is carried out with installation and subsequent cutting down of beacons, implementation of temperature shrinkage joints with width of about 5 mm, dividing the brace into sections not more than 6x6 m. The layer is compacted using a vibration rack.

For the rational organization of construction production, the entire roof is divided into grabs, and the latter into plots. At the same time, the area of ​ ​ one plot determines the replacement productivity of the roofers' link, and the grip corresponds to the architectural and planning solutions of the building.

Work on the roofing arrangement is carried out in a certain sequence: cleaning and cutting of the surface of the coating, sticking of additional layers around the bowl of funnels and in places of abutment, sticking of the main roofing carpet, covering of abutments and exhaust pipes with roofing steel.

Surface of concrete base is cleaned from dust and debris. It is necessary to complete all construction work on the roof before the start of work; install internal drains; make cement-sand bracing, temperature shrinkage seams and compensators; terminate potholes and shells; plastering sections of vertical surfaces of stone structures to the height of roofing carpet adjoining; at the places of transition from horizontal to vertical surfaces inclined sides are made at an angle of 45 ° and 100 mm high from cement sand mortar.

4.1.5 Requirements for quality and acceptance of works.

During preparation and performance of roofing works the following shall be checked:

- linocrom quality, which must meet the requirements of the specification;

- availability of individual coating elements for roofing works;

- correctness of all connections to projecting structures;

-conformance of the number of roof carpet layers to the design instructions.

The acceptance of the roof shall be accompanied by a thorough inspection of its surface, especially at the funnels, drainage trays, in the grooves and at the places of abutment to the projecting structures above the roof.

The rolled roof shall meet the following requirements:

- have specified slopes;

- do not have local backslopes where water can linger;

-the blood carpet must be securely glued to the base, do not delaminate and do not have bubbles, troughs.

Production defects detected during roofing inspection shall be corrected prior to commissioning of buildings or structures.

Acceptance of the finished roof shall be executed by an act evaluating the quality of works.

At acceptance of performed works are subject to inspection by concealed works acts:

- roofing to water intake funnels;

- adjoining the roof to protruding parts of ventshats, antennas, braces, posts, parapets;

- arrangement of two layers of roofing carpet in layers.

After the completion of all roofing work, it is necessary to fulfill the requirements of environmental cleanliness: all the remains of bitumen, mastic clumps, cutting of roll materials must be carefully packed, laid in containers, containers and lowered from the roof using mechanized means, then taken to specially designated areas.

Job Instruction for Installation of Monolithic Floor Slab

4.2.1 Scope of application

The Job Instruction is used in the design, organization and execution of works on the construction of cast-in-situ reinforced concrete beam-free flooring.

The works considered by the map include:

-Installation of slab formwork;

- Reinforcement layout;

-Betonation of structure and care of concrete mixture;

- Removal of slab formwork.

Linking the Job Instruction to local construction conditions is to specify the scope of work, mechanization tools, graphic diagram and material resource requirements.

4.2.2 Procedure and organization of works

The following works must be completed prior to the start of formwork:

- a base is prepared for supporting scaffolding of formwork of beam-free floors;

- columns are arranged and acceptance certificates of mounted structures are drawn up on the basis of as-built geodetic survey;

- formwork blocks and elements of inventory scaffolding in the amount of at least 3 replaceable stock are imported and stored in working zones;

- presence, marking of boards, blocks and other formwork elements has been checked;

- tools, equipment, accessories, tools are prepared and tested;

- electrical lighting of workplaces and construction site is arranged.

Formwork units are installed using KB408 tower crane. Work on installation of formwork blocks is carried out sequentially by grips, in the order indicated on sheet 6.

The formwork of the inter-storey floors rests on the underlying floor by a system of inventory posts of special scaffolding. Inventory racks are used when the published floor is placed above the existing (floor or floor) at a height of up to 6 m. The distance between inventory racks is taken to be from 1.0 to 1.5 m.

The formwork of the beam-free floor is arranged in the following sequence:

- 50 mm thick lags are laid on the carefully planned base, on which inventory telescopic posts are installed for the formwork blocks;

- formwork units are installed on the heads of racks.

Support struts of formwork shall be secured by horizontal (in two mutually perpendicular directions) and diagonal braces.

The following works shall be performed prior to the commencement of reinforcement works:

- formwork on the gripper is completely completed and working floorings and platforms are arranged;

- certificates of acceptance of the installed formwork are compiled;

- reinforcement nets in the amount of 2-3 - replaceable stock were imported and stored in the area of the lifting mechanisms;

- reinforcement products are corrected from possible damages, cleaned from rust and dirt, their marking is checked;

- mechanisms, tools and accessories are prepared and tested.

Prior to concreting of the slab, the following works shall be performed:

- crane tracks are installed and tower crane is mounted;

- formwork installation is completed, reinforcement and embedded parts of the floor are laid to ensure uninterrupted operation during 2-3 shifts;

- the necessary platforms and flooring have been installed;

- mechanisms, equipment and accessories necessary for laying and compaction of concrete mixture are prepared and tested;

- power and lighting power is supplied and lighting of workplaces and concreting zones is provided;

- acts for hidden works on installation of formwork, fittings and embedded parts;

- sound and light alarm at places of concrete mixture reception and laying has been installed and tested;

-armature and embedded parts are cleaned of dirt and delaminated rust.

Slab slabs shall be split when concrete reaches strength not less than 70% of the design one and performed in the following sequence:

-by means of screw jacks of racks are released from clamping of formwork units. This process begins smoothly in 2-3 receptions through one rack under the supervision of the foreman or foreman. After loosening from the clamp, the posts under the central fight of the block are removed and removed, leaving the fights at the ends of the block. Then bolts of shields attachment to fights are removed and formwork shields are gradually removed, after which remaining posts of scaffolding and fights are removed.

After disassembly of the slab and scaffolding formwork, all elements are cleaned of concrete, repaired (if necessary) and stored by grades in the stack.

4.2.3. Methods and methods of work

Formwork Installation

Installation and disassembly of the formwork is carried out by one link of 3 people: carpenter 4 times -1 people. (P1); carpenter 3 times -1 people. (P2); carpenter 2 times -1 people. (P3). The installation crane is serviced by the driver of the 5th category.

Carpenter P1 makes lag markings and after it carpenters P2 and P3 install telescopic posts of supporting forests, starting from the extreme spans. Then formwork blocks are installed on the heads of posts by means of crane.

After installation of each subsequent formwork unit, the carpenters (P1, P2, P3) attach the struts with horizontal and diagonal braces. P1 carpenter during installation monitors the sequence and correctness of formwork installation.

Reinforcement works

Works on reinforcement of monolithic beam-free flooring are performed by a link consisting of four people:

Fitter 4 times -1 people. (A1)

Fitter 2 times -3 people. (A2,A3,A4)

For lifting and installation of reinforcement grids, a tower crane served by a driver of 6 sizes is used.

Grids are installed in the following process sequence:

Reinforcement bars (A3, A4) are placed, and reinforcement bars (A1) lay out concrete gaskets on the formwork to create a protective layer of concrete. The rebar (A2) at the bottom strokes the grid. At the command of the fitter (A1) the crane operator gives a grid roll to the place of laying and stops descent it at the height of 0,50,7 m from a timbering surface.

Fitters (A3) and (A4), standing at the ends of the roll and grabbing it with both hands at the direction of the fitter (A1), install the roll, disassemble and roll it out along the slab formwork. The rebar (A1) reconciles the correct location of the mesh and together with the rebar (A3) and (A4) draws the mesh, laying it exactly in the design position.

Fitters (A3) and (A4) raise the mesh with crowns in places of laying of gaskets and install gaskets for joints of rods. After laying the bottom row of grids, the top row of grids is laid in the same order.

Concrete works

Work on concreting the slab is carried out in two shifts, by a team consisting of three links in each shift.

The concrete mixture from the concrete mixer body into the vibrating frames is received by link No. 1, consisting of three people:

Concrete workers 2 times. (B1, B2, B3), having the rights of riggers.

Concrete mixture laying, compaction and maintenance of laid concrete is carried out by links No. 2, 3 in which there are four people:

Concrete workers 2 times. 2 persons. (B4,B5);

Concrete workers 3 times. 2 persons. (B6,B7).

The tower crane is served by the driver 6 times.

The concrete maker (B1) at the receiving site monitors the loading of vibration frames and, if necessary, cleans the body from adhered concrete, slings the rails to the crane hook, and sends a command to the crane maker for lifting. It also accepts and installs empty badges for loading. The crane operator lifts the loaded badge and supplies it to the workplace.

The concrete maker (B2) together with the concrete maker (B3) receives the loaded vibration drum at the place of concrete mix laying. One of them opens the shutter, the other includes a vibrator hung on the badge and regulates the supply of mixture to the structure. He also instructs the crane operator to move, lower or lift the vibration frame

Concrete workers (B4, B5) from link No. 2 clean the formwork before concreting; close up cracks, humidify with water the surfaces adjoining to concrete, clean fittings from rust, will test the equipment, stock and devices, correct defects of a timbering in the course of concreting.

Concrete workers (B6, B7) from link No. 2 level and compact the concrete mixture with vibrators, monitor the correctness of the reinforcement position and the design thickness of the concreted slab. Concrete maker (B4) pours water and covers concrete with water-intensive material as required during its hardening. Link No. 3 performs the same work as link No. 2. Links No. 4,5,6 work on the second shift.

Removal of formwork

After concrete reaches the required strength, the carpenter (P1) inspects the formwork structure and the link begins disassembling the formwork elements. Carpenters (P2, P3) smoothly, through one post with the help of screw jacks of posts, releases the fight of formwork blocks and posts under the central fight of the block. Carpenter (P1) removes the central fight, leaving fights at the ends of the block. Then the carpenter (P1) removes the bolts that attach the fights to the shields, and the carpenters (P2, P3) gradually remove the formwork shields.

After the formwork shields are removed and stored according to the grades, the link removes the remaining struts and struts.

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