Build Daily

August 12, 2017 18:07

The benefit to the SNIP 2.09.03-85 - the design of anchor bolts manual for mounting of structures and equipment

allowance to SNIP 2.09.03-85 - the design of anchor bolts manual for mounting of structures and equipment

Central Research
design and experimental institute

industrial buildings and constructions (TsNIIpromzdany)

Benefit
the design of anchor bolts for attaching

building structures and equipment

(to the SNIP 2.09.03)

recommended to publish the decision of the section of bearing structures of scientific and technical TsNIIpromzdany Council.

contains the basic provisions on the calculation of bolts and fasteners building designs and construction equipment.Considered progressive types of bolts and given recommendations for their use.Addresses issues of the wells in the formation of concrete and reinforced concrete, install and tighten bolts, alignment of equipment and structures.

for engineering and technical personnel design institutes, installation and construction companies, as well as manufacturing plants.

1. General information

1.1.This manual has been compiled to the SNIP 0

2/09/03 "Constructions of industrial enterprises" and is used for fixing anchor bolts (the bolts), including screws and dowels spacer type of structures and equipment for concrete, reinforced concrete and brick elements (foundations, power floors, walls andetc.) operating at the design outdoor temperature to minus 65, inclusive, and upon heating the concrete foundation to 50 ° C.

Note.The estimated winter outdoor temperature is taken as the average temperature of the coldest five-day week, depending on the construction area according to SNIP 2.01.01.

Settlement process temperatures are set by the design assignment.

1.2.When heated, the concrete foundation of more than 50 ° C in the calculation should take into account the effect of temperature on the strength characteristics of the foundation material, bolts, gravies, adhesives, etc.

1.3.The bolts are designed for operation in harsh environments to high humidity, must be designed taking into account the additional requirements of SNIP 3.04.03.

1.4.The requirements of this Manual do not exclude the presence of an appropriate justification, the use of other methods of fastening on the foundations of the equipment (for example, vibration dampers, glue etc.).

1.5.The recommendations of this Manual should also be observed when working on the installation and securing of building structures and technological equipment during installation.

2. The main types of bolts and their field of application

2.1.According to a constructive solution of the bolts are classified into the following types: curved;with the anchor plate;component with anchor plate;demountable with anchor device;direct;with a tapered end.

2.2.By way of installing the bolts are divided into mounted to concrete foundations and foundations established on the prepared, or other structural elements in the ready-drilled or "wells".

curved bolts and anchor plate mounted to concrete foundation to lead in Fig.1.

Fig.1. Bolts to be installed in concrete foundations to

and - bent;b, c, d - with the anchor plate;d, e - the component to the anchor plate

removable bolts installed after concreting of foundations in special anchors, pre-specified in the body of the foundation, are shown in Fig.2.

Fig.2. removable bolts installed after the concrete foundations

and - with a flat anchor plate (M12-M48);b - cast anchor plate (M56-M125);in - with welded anchor plate (M56-M100)

curved bolts installed in wells, are shown in Figure 3.

Fig.3. The bolts are installed in the "pits", pre-specified in the foundations

Bolts directly installed into the drilled hole of finished basements and dockable synthetic glue (epoxy, siloxane) or using cement-sand mixture vibrozachekanki method, are shown in Fig.4.

Fig.4. Direct bolts installed in drilled wells finished basements and

- dockable synthetic glue (and with the number 209 305..);b - fixed with cement-sand mixture process vibrozachekanki (.. but with the number 419 305)

spacer type bolts with conical end, installed in drilled wells prefabricated foundations and secured by the expander collet or cement-sand mortar method vibro are shown inFig.5.

Fig.5. Bolts, spacer type with a conical end, installed in drilled wells finished basements

well - secured by the expander collet (and a number 539 170..);b, c - dockable cement-sand mortar vibro way (and with number 737 573 and 763 525 and with a number....)

expansion plugs (the plugs) that are installed in wells drilled building components (walls, columns, etc.) and secured by the spacer device shown in Fig.6.

Fig.6. dowel spacers that are installed into the drilled hole of finished designs

a, b - dowel-pin spacing (M8-M24) (as with №1225936..);in - dowel bushing, spacer (M6-M20);1 - stud spacing;2 - Spreader collet;3 - a nut;4 - spacer;5 - Spreader tube;6 - fixing bolt

2.3.Under the terms of operation of the bolts are divided into design and design.

to settlement include bolts, the stress caused during operation of constructions and operation of the equipment.

To design the bolts are provided for fastening to building structures and equipment, the stability of which is to rollover or offset is provided by its own weight or construction equipment.Structural bolts are designed for the straightening of building structures and equipment at the time of their installation and to ensure the stable operation of the structures and equipment in operation, as well as to prevent their accidental displacement.

dynamic level is set according to the type and nature of the equipment.

2.4.Bolts for fixing the structures and equipment shall be manufactured in accordance with GOST 24379.0 "Bolts for fundaments. General technical conditions" and GOST 24379.1 "Bolts for fundaments. The design and dimensions."

Classification bolts in accordance with the standards given in Table.1.

Table 1

Figure bolt type Nominal thread diameter d , mm GOST 24379.1
1 and c Curved anchor plate 12-48 A type.1 Version 1
b 16-48 type.2 Version 1
in 56-140 Version 2
g 100-140 Version 3
d Components with anchor plate 24-48 Version 1
e 56-64 type.3 Version 2
2 and Removable anchor device 24-48 Version 1
b 56-125 type.4 Version 2
in 56-100 Version 3
3 Curved wells 12-48 type.1 Version 2
4 Direct glue and cement-sand vibrozachekankoy 12-48 type.5 -
5 and With conical tip 12-48 type.6 Version 1
b Version 2
in Version 3

2.5.Bolts curved (see. Fig. 1 a) intended for fastening constructions and processing equipment in those cases where the height of the foundation is independent of the depth of embedment in concrete bolts.

2.6.Bolts anchor plate (see. Fig. 1b, c, d) having a lesser depth as compared with sealing bolts curved recommended in cases where the height of the foundation depth defined sealing bolts in concrete.

2.7.Bolts component with anchor plates (see. Fig. 1, d, e) apply in cases of installation by turning or sliding (for example, when installing vertical cylindrical devices of the chemical industry).In these cases, coupling with a stud and the lower anchor plate installed in the array during concreting foundation, while the upper pin screwed into the socket on the entire thread length after installation through the holes in the supporting parts.

length of screwing the stud into the box should be at least 1.6 the diameter of the bolt thread.

2.8.Bolts and curved anchor plate mounted to concrete foundation of conductor on special devices, strictly retaining their design position during concreting.

2.9.removable bolts (see. Fig. 2) it is recommended to use mainly for fixing of heavy rolling, forging and pressing, electrical and other equipment, which causes high dynamic loads, as well as in cases where the bolts in the operation of the equipment shall be subject to a possible replacement.

When installing removable bolts to the array only the foundation is laid anchor armature (anchors) and stud set freely in the tube after the foundation of the device.

2.10.Bolts curved installed in the "wells" of finished foundations (see. Fig. 3) followed by concrete embedment pit recommended for mounting equipment and constructions in those cases where there may not be installed bolt in the drilled hole.

2.11.Bolts straight on synthetic adhesives (epoxy or siloxane) and secured by a cement-sand mixture vibrozachekanki way (.. See figure 4) is recommended for mounting of constructions and technological equipment r level cycle asymmetry ³ 0,6 - bolt onsynthetic adhesives and r ³ 0,8 - bolt on vibrozachekanke.

bolts, secured with epoxy glue, can be operated at the design outdoor temperature down to minus 40 ° C and heating the concrete up to 50 ° C, bolts, dockable siloxane glue - accordingly to minus 40 ° C to 100 ° C.

2.12.Bolts spacer type, secured by the expander collet (see. Fig. 5a), and expansion plugs (see. Fig. 6) are designed for mounting of structures and equipment, undergo static and vibration ( r ³ 0,9).

2.13.Bolts with a conical end, dockable cement-sand mortar method vibro (see. Fig. 5b, c) are recommended for mounting of constructions and technological equipment, with the exception of equipment that causes significant dynamic and shock loads (press-forging equipment, rollingcrates, large electric motors, etc.).

Note.Bolts with a conical end performance 2 landing are made, performance 3 - screwing the conical sleeve.

2.14.Bolts that are installed in drilled wells finished basements, is not allowed to apply for attachment of support columns of buildings, equipped with overhead cranes, as well as for high-rise buildings and structures, which is the basic wind load.

To fix these constructions are allowed to use screws with cone point set by means of vibro.

This depth of sealing bolts should be at least 20 d .

When activities that provide reliability and durability of the anchorage (increased planting depth, additional anchors devices, etc.), may be mounting these structures of other types of bolts, installed in drilled wells finished basements, in consultation with the organization - the developer of the Bolt.

2.15.For mounting of process equipment may be installed in boreholes with a diameter screws over 48 mm with a corresponding feasibility study and if the drilling equipment.

2.16.Expansion Plugs are designed to secure the most sanitary, electrical and ventilation equipment, as well as trim elements, cladding, etc..

designs and sizes of wall plugs are shown in Appendix.1.

2.17.Plugs are designed for structural fixing various small equipment and metal structures, parts of decorative finishes and other elements on the foundations, walls and other building structures made of concrete, reinforced concrete and brick.

Technical documentation for plugs designed VNIImontazhspetsstroem.

2.18.Mounts expander collet bolts and wall plugs may be put into operation immediately after installation of bolts and dowels.

3. Calculation of bolts

3.1.Loads acting on the bolt, the nature of the impact divided into static and dynamic.The magnitude, direction and nature of the acting loads from the equipment on the bolts must be specified in the job for the design of foundations for equipment.

3.2.Mack steel bolts estimated operating at the estimated winter outdoor temperature down to minus 65 ° C, inclusive, shall be appointed in accordance with the instructions tab.2.

Table 2

estimated winter outdoor temperature, ° C From -40 ° C and above -40 to -50 ° C from -51 to -65 ° C
steel grade VSt3kp2, VSt3ps2, St20 09G2S-6 10G2S1-6 09G2S-8 10G2S1-8

Note.Bolts are allowed produce other grades, mechanical properties are properties not lower steels specified in Table.2.

3.3.Bolts for mounting of building constructions at an outdoor temperature of minus 40 ° C or above shall be made of carbon steel VSt3kp2 (GOST 380) and for mounting equipment - Carbon steel VSt3ps2 (GOST 380) or of structural steel St20 (GOST1050).

for bolts 56 mm or more in diameter may be used under the same temperature conditions, low alloy steel grades 09G2S-2 and 10G2S1-2 (GOST 19281).

3.4.For mounting vessels and apparatuses for processing and storage of hazardous products, as well as for mounting column-type machines with estimated winter outdoor temperature down to minus 30 ° C inclusive, should be used VSt3ps3 grade steel (instead VSt3ps2 steel grades);when the outside air temperature of minus 31 to 40 ° C - St20 grade steel according to GOST 1050.

3.5.When estimated winter ambient temperatures up to minus 65 ° C low alloy steels 09G2S 10G2S1-8-8 should have a toughness not lower than 30 J / cm2 (kgf × m 3 / cm2) at a test temperature of -60 ° C.

3.6.Structural bolts in all cases be allowed to produce from steel VSt3kp2 GOST 380.

3.7.The calculated tensile strength of metal bolts Rva be taken from Table.3.

Table 3

bolt diameter, mm Calculated metal tensile strength Rva , MPa
VSt3ps2, VSt3kp2, St20 09G2S 10G2S1
10-30 145 185 190
36-56 145 180 180
64-80 145 175 170
90-100 145 170 170
110-140 145 170 165

3.8.All bolts must be tightened on the value of pre-tightening F, that for static loads shall be taken as: f = 0,75 P for dynamic loads F = 1,1r, where P - the design load acting on the bolt.