The volume of the bottom plate is PD 10. The plate is road PD10. Bottom plates: materials and characteristics

Road slabs with a hole for the hatch PD 10 These are reinforced concrete products that have received the widest distribution. Almost the entire field of road construction cannot do without such elements. The arrangement of technical structures with reinforced concrete slabs makes it possible to obtain durable and strong structures that are reliable and resistant to various influences. Wells must be covered with special plates with a hole for the hatch -base plates PD 10 . A special shape and a hole of the required diameter make it possible to use them for many types of wells and other technical structures.

1. Variants of writing marking.

Plates with a hole for the hatch PD 10 manufactured in accordance with currentGOST 8020-90 and in the marking indicate the type of plate product and its size range. The designation can be written in the following ways:

1. PD 10;

2. PD-10.

2. The main scope of products.

For existing wells often useplates with a hole for the hatch type PD 10 . These elements allow you to securely block the structure, providing functional protection against the ingress of external debris, falling people or technical means in the hatch, protection against soil collapse and other functions. AsPD 10 made from high quality materials, finished construction the hatch, covered with such a plate, is able to withstand high loads - a lot of weight from passing vehicles and equipment.

During operationslabs PD 10 manifest themselves as durable reinforced concrete products, as they are resistant to action low temperatures, the action of water or other aggressive media. These products are subject to mandatory processing, since in the road sector (used to organize storm wells on highways and roads), chloride salts are used to combat road icing. Without chemical and hydrophobic protectionroad slabs with a hole for a hatch PD 10 are not allowed for operation, in a harsh aggressive environment, the elements quickly collapse and lose their strength characteristics. Compliance with the technology of manufacturing and data processing of reinforced concrete slabs makes it possible to show high technical parameters even with prolonged use and in conditions of a changeable climate.

Plates with a hole PD 10 can be used for the installation of drainage, sewer and other round underground wells. The scope of use of plates is not limited to this. Yes, concreteplates PD 10 can be laid in urban communications during the arrangement of drainage, as well as network and gas wells, and in various communication lines. Less commonly, these reinforced concrete products are used to equip airfield facilities and military training grounds.

3. Designation of product marking.

Reinforced concrete road slabs with a hole for the hatch PD 10 mark according toGOST 8020-90 , according to which they indicate in the designation: product type P - plate, 10 - size group. dimensions slabs make up2800x2000x220 , where the length, width and height of the product are respectively written.

Additionally, the permeability of concrete can be specified: "N" - normal. "P" - reduced, "O" - especially low. For product marking, parameters such as geometric volume are also used -1,232 , volume of concrete - 0,99 , mass of the product -2480 . The symbol, weight and date of manufacture of the reinforced concrete product must be applied with indelible black paint on the outer side surface.

4.Basic materials for manufacturing and characteristics.

Plates PD 10 for hatches must be made using vibrocompression technology. Heavy and extra heavy concretes are used as materials. To increase the strength and performance, crushed gravel, fine sand and purified water are used. Concrete must correspond to the compressive strength grade - not less than M200, which corresponds to the strength class - not less than B15. Operation in winter period of these plates is determined by the frost resistance brand - at least F50 and F100, that is, at least 50 freeze-thaw cycles. Water resistance must correspond to the W2 brand, moisture absorption up to 8% is allowed.

All reinforced concrete products are subjected to mandatory reinforcement, which allows the use of slabs in conditions of increased compressive and compressive deformations. Steel frames with bars for reinforcement of At-IIIC and At-IVC classes are used - according toGOST 10884 and A-I, A-II and A-IIIGOST 5781 . Additionally, special mounting loops must be laid in the body of the slab element - according toGOST 10922 . All steel products are subjected to anti-corrosion and chemical treatment, which allows to extend the service life.

The well mine is constantly exposed to external threats. The most dangerous among them are groundwater flooding and strong ground pressure. In order to prevent damage to communications, the bottoms of the PD-10 wells are installed during the installation process.

This reinforced concrete element with a stainless steel frame is protected from cracking and freezing. After installation, the shaft will be sealed, and engineering communications will be protected.

Main characteristics of plates PD-10

• The element has a round shape, thanks to which it is convenient to place it inside the prepared shaft.
• Heavy concrete with a strength grade of at least V-22.5 is used in the manufacture. This parameter guarantees protection against earth pressure and cracking under the weight of the wall rings.
• The degree of moisture resistance is W-8. The product will not absorb ground water. The gradual swelling of concrete is excluded. This is important because in winter, water can freeze and expand, causing internal cracks. With our products, you are insured against this.
• Frost resistance is not lower than F-100. The product withstands more than 100 cycles of freezing and thawing. For the Russian climate with cold winters and frequent ground frosts, this is especially true.

How to make an order?

To buy the bottoms of PD-10 wells, contact the JBI TORG company. We ourselves produce products in strict accordance with GOST 8020-90. Products are made of high quality concrete with reliable reinforcement, protected from corrosion. We have provided steel brackets on the surface - with them it will be more convenient for you to lower the slab using special equipment. Leave a request on the website or call us at the indicated numbers to clarify prices and other details.

Road slab of wells ( PD 10 – reinforced concrete structural element of round underground wells, on which the well hatch rests, located on the road. Together with other well elements, base plates are often used in road construction when laying urban communications - drainage, network, water and gas wells, various communication lines. Strict requirements for road surfaces presented to the plate. Norms and standards for the production of well road slabs are enshrined in GOST 8020-90.

Plate has rectangular shape with a recess for supporting the well cover and a hole corresponding to the diameter of the well. The presence of a road plate allows you to securely fix the hatch and the well in its position, excluding deformation from the transport passing through it. Road slab PD 10 is made of high-strength heavy concrete reinforced with prestressed reinforcement, which significantly increases its performance and guarantees high wear resistance. Due to the reinforcement with steel frames of the At-IIIC and At-IVC and A-I, A-II and A-III classes and an increased thickness of 220 mm, the plate acquires a mass of 2647.5 kg. Such a weight is mounted and lifted by the mounting loops using cranes.

Due to the use of heavy concrete grade M200, the road slab of wells PD 10 is distinguished by its strength, durability and high corrosion resistance. Moisture absorption of concrete is not more than 8% of the design mass. Concrete grade for frost resistance of the base plate is not lower than F50, water resistance is not lower than W2. The road base plate plays an important role in road construction, as it prevents subsidence of the roadbed in the area of ​​the well and contributes to safer movement of various vehicles through such sections. For maximum safety, it is imperative to mount the elements of the well so that the manhole cover should be flush with the surface.

Product marking

Like other reinforced concrete products, PD road slabs are marked with alphanumeric groups. The first group indicates the type of product, then (rounded to the nearest whole number) indicate (in decimeters) the diameter of the hole.

The second group carries additional information - the concrete permeability index: (N - normal, P - reduced, O - especially low) and special design characteristics (embedded products, holes, niches and cutouts), indicated by Arabic numerals or letters.

For an example of marking a road slab, consider PD 10 (2800x2000x220mm), where:

• PD - type of well element - road slab;
• Number - hole diameter;
• The letter is the permeability of concrete.

The symbol, weight and date of manufacture of the reinforced concrete product are located on the outer side surface of the PD base plate.

Product quality control

The main reason for the rejection of slabs, as well as other reinforced concrete products, is the exposure of the working reinforcement. Due to such a defect, the product undergoes corrosion and crumbling very quickly during operation, which can threaten road safety.

For any concrete slab, the absence of cracks is important. Only barely noticeable shrinkage cracks with a width of no more than one tenth of a millimeter are possible.

Minor deviations of the geometrical parameters of the base plates are allowed, not more than ±5 mm in thickness, ±6 mm in the length of the plate. The surface of the road well slab PD should not have a large number shells with a diameter of more than 15 mm and a depth of more than 5 mm.

Acceptance tests are carried out when checking indicators:

• class of concrete in terms of strength and tempering strength of concrete base plates;
• conformity of reinforcing and embedded products;
• strength of welded joints;
• thickness of the protective layer of concrete to reinforcement;
• accuracy of geometric parameters;
• quality concrete surface plates.

Accompanying a batch of road concrete slabs of wells technical certificate, should contain information on the date of manufacture of a batch of concrete slabs for PD 10 wells, on the number of products, on the results of strength tests; information about the brand of concrete and compressive strength, as well as the class of concrete for frost resistance and water resistance.

Transport and storage

Well slabs must be stored in stacks in working position ( front side up). One stack should not be more than 6 rows, in order to avoid falling and deformation of products. For transportation, road slabs are stacked in a stack no higher than 2.5 meters and securely fixed. Both during transportation and storage between the plates there must be gaskets with a thickness of at least 40 mm.