steel structure Construction foundation Connect L shape anchor bolts

Product Overview

Description

Anchor bolt or Foundation bolt

The anchor bolt is a tool that is buried in the ground or foundation and connects the ground or the foundation with the machine. Generally use Q235 steel, that is, light round. Rebar (Q345) strength, do nut thread no light round easily. For light round anchor bolts, the buried depth is usually 25 times the diameter, and then a 90 degree bent hook about 120mm. If the bolt is big in diameter (such as 45mm), the depth of the bolt is too deep, then it can be welded on the end of the bolt to make a big head (but there is also a certain requirement). Both the deep and the bent hooks are used to ensure the friction between the bolt and the foundation, so as not to cause the bolt to pull out and destroy.

 

The anchor bolt has fixed, no strong vibration and impact of equipment, etc.. The tensile capacity of the anchor bolt is the tensile capacity of the round bar itself. The size is equal to the sectional area multiplied by the allowable stress (Q235B:140MPa, 16Mnor, Q345:170MPA), that is, the allowable tensile load capacity at design time.

 

purpose

1, fixed anchor bolt, also known as short anchor bolt, which is combined with the foundation, used to fix the equipment without strong vibration and impact. 2 , movable anchor bolt, also called long anchor bolt, is a detachable anchor bolt. It is used to fix heavy machinery and equipment with strong vibration and shock. 3, expansion anchor, anchor bolt is often used for fixed static simple equipment or auxiliary equipment. Bilge anchor anchor bolt installation should meet the following requirements: expansion anchor bolt diameter bolt foundation center to edge distance of not less than 7 times the strength of the foundation; installation of expansion anchor bolt anchor hole shall not be less than 10MPa; there shall be no crack, pay attention to prevent the collision of steel, pipe buried drill and foundation; the hole diameter and the the depth should be matched with the expansion anchor bolt. 4, bonding anchor bolt is a kind of anchor bolt commonly used in recent years. The method and requirement of anchor bolt are same as expansion anchor bolt. But when the adhesive, pay attention to the holes in the debris blown clean, and not allowed to damp. classification The anchor bolt can be divided into fixed anchor bolt, movable anchor bolt, expansion anchor, anchor bolt and bond anchor bolt.

 

According to the different shapes, they are divided into: L type embedded bolt, 9 type embedded bolt, U type embedded bolt,

welding pre embedded bolt, bottom plate embedded bolt. Alias stiffening anchor plate anchor bolts, welding anchor bolts, anchor bolts, anchor type steel plate anchor bolts, anchor bolts, anchor bolts, anchor wire etc.. For laying in a concrete foundation, as a fixed all kinds of machines and equipment for the use of the base. The 7 character anchor bolt is one of the most commonly used anchor bolts. Generally use Q235 steel production, high strength using Q345B or 16Mn material processing, but also useful 40Cr material processing 8.8 strength products, and occasionally also useful two or three grade steel processing. The anchor bolt rod, thick wool, have different forms of. The raw materials of steel wool without restructuring, by direct processing or wire and steel; thick or thin rod type A or type B, by restructuring steel into the corresponding requirements of the rod diameter after processed. The welding type anchor bolt is made of a single bolt welded and stiffened iron plate. Its resistance to drawing is strong.

 

According to the conditions of use, respectively, can reach 3.6, 4.8, 6.8, 8.8 and other grades.

The tensile capacity of the 3.6 grade 7 character anchor bolt is the tensile capacity of the steel itself. Q345B or 16Mn raw materials directly processed anchor bolt, its tensile capacity can reach 5.8 tensile strength. Tensile strength of grades 4.8, 5.8, 6.8 and 8.8 refer to the mechanical properties of GB/T3098.1.

 

Installation method

1, a buried method: pouring concrete, the anchor bolts buried. When the tower is controlled by overturning, the anchor bolt should be buried in one time. 2, reserved hole method: equipment in place, the hole clean, put the anchor bolt into the hole, equipment positioning, after the use of a higher than the original level of no shrinkage fine stone concrete pouring, tamping compaction.

An embedded anchor bolt center to the edge of the base distance shall not be less than 4D (D is the diameter of the anchor bolts), and shall not be less than 150mm (d < 20 should not be less than 100mm), not less than half the width of the anchor plate with 50mm, when can not meet the above requirements, appropriate measures should be taken to strengthen.

 

The anchor bolt diameter of the structure shall not be smaller than 20mm. In case of seismic action, double nuts shall be adopted or other measures to prevent looseness shall be adopted, but the anchor length of the anchor bolt shall be increased by 5D as compared with the anchoring length under the action of non earthquake. Installation planning of anchor bolt anchor bolt in the foundation treatment in the past loose tighten the anchor bolts, the bolt may pull live, at this time should be adjusted to the original position of the bolt, and the bolt around the base shovel enough position, then the two aspect U shape steel welding on the bolt, the last water pit clean and grouting treatment for concrete design strength after solidification to tighten the live anchor bolt deviation live anchor bolt deviation, and roughly the same death foot bolt, anchor bolt can be just pull out handle. If the bolt is too long, can be in the machine cut a set of threads; if the bolt is too short, available hot forging elongation; such as position discrepancy, corrected by bending method. Applications for a variety of devices, fixed base steel embedded parts, lights, traffic signs, pump, boiler installation, heavy equipment embedded fixed etc..

 

international standard GB-T799-1988 anchor bolt