Chemical anchor bolt embedded parts for processing insufficient strength method

Chemical bolt anchoring technology to reinforce technology.In recent years, in building renovation, construction and change of use, or the existing building renovation and expansion and so on, chemical bolts anchoring construction as a new, simple and effective method in the construction of a fixed, is widely used.

1 chemical bolt component

Chemical bolt, screw, by chemical hose washer and nut.

Screw, washer, nut (six) generally have galvanized steel and stainless steel two kinds (in accordance with the requirements of hot dip galvanized).

Chemical hose (or plastic packaging pharmaceutical tube) containing the reaction resin, curing agent and silica particles.

2 parameters related to chemical bolt

Drilling depth: by anchor bolt type and size to determine required drilling depth, with a few exceptions, it is generally greater than the anchoring depth.In drilling, drilling depth control is particularly important.If used with the corresponding manufacturers anchor bolt is matched with the automatic protection of deep hole drilling machine (e.g. German-hui fish card anchor bolt are matched with the high-tech column cone type universal drill bit FZUB) drilling, drilling is very convenient.

Anchorage depth of anchor foundation structure: from surface to the bottom end of the threaded rod distance, is the important parameter influencing their bearing capacity.

Anchorage anchorage thickness: thickness equal to the anchored object thickness.If the anchor foundation at least plastering or tile, is covered with an insulating layer, then anchoring anchoring thickness at least equal to the thickness of the insulating layer plastering or tile, plus the anchored object thickness.

Margin: refers to the anchor bolt axis to the free edge of the distance member.

Spacing: refers to the distance between adjacent anchor axis.

Thickness: refers to the anchor base thickness.

In order to play a anchor bolt and the maximum carrying capacity, must guarantee a certain spacing, margins, thickness of the component, the data general to the manufacturers to provide technical parameters for.

Two, the process principle:

Through the synthetic resin mortar adhesive anchor and the wall of the hole, the bolt, anchorage foundation and the anchored object into a whole, thereby fixing component or increase the bearing capacity effect.

Three, process flow:

Setup: drilling hole cleaning reagent tube placement -- -- -- -- -- drilling bolts gel process hardening process -- a fixed object

1: the first borehole according to design requirements, drawings by spacing, margins set position, in the primary on drilling deep hole, aperture, must meet the design requirements.

2 hole cleaning: use air pressure blowpipe tools will hole floating dust and dust removal, maintain hole cleaning.

The 3 placement agent tube: chemical tube insertion clean hole, is inserted when the resin in hand temperature conditions as the honey flow, can use hose.

4 drill into the bolt is screwed into the screw drills: use until the medicament outflow.General use of percussion drill or drill drill, drill speed of 750 rpm.When the bolt is screwed into the tube to be broken, agent, resin, curing agent and silica particles mixing, and fills the anchor bolt and the hole wall of the gap between.At the same time, anchor bolts can also be inserted into the wet hole, but water must drain hole, the gelation process and hardening process of waiting time must redouble.

The 5 gel process: keep installation tools do not move, chemical reaction time to meet manufacturers to provide parameters.

6: the hardening process to remove the installation tool for chemical hardening, chemical reaction time to meet manufacturers to provide parameters.

7 fixed objects: to be completely after hardening agent, plus the washers and six corner fixing objects can be.

Four, the quality requirement and control

The 1 hole is best to use with anchor bolt matched to the drill bit, drill bit for use in drilling concrete models, drilling must avoid reinforced, one of which is to prevent injuries of main reinforcement, second is to prevent the injury bit.

2 before construction, must be on the anchor bolt material mechanical properties and heat resistance test.Test of anchor bolt material, via after the test, can be used, because in structure construction, anchor bolt shear more opportunities; in construction, anchor bolts are often used in fixed iron, iron plate welding and fixing other components, therefore, the anchor bolt (by welding) after the thermal mechanical properties is crucial.

3 in the construction site should be anchor site application conditions determine the test, in order to fully test bearing capacity.Field test can be used in construction site near, test design, supervision and construction method, the present.Field test generally adopt the axial tension, shear in general laboratory, test method with reinforced.

4 hole cleaning must be clean of dust and floating dust hole.

5 pipe in winter construction, should advance its heat treatment, to ensure that the tube is inserted in the hole when there is sufficient liquidity (in hand temperature, resin like honey flow).

6 screw must be screwed in to drill, direct type.

7 hole without water.

Five, application examples

In the Chinese Academy of Sciences Library, archives corridor construction of the steel structure, in the steel structure lifting stage, because the owners of the gallery features were adjusted, resulting in increasing load, the Design Institute of structural engineers review, member strength meets the requirement, but having the strength is insufficient, must be treated as early winter morning, when construction began, 9:00, temperature of -5 ℃, the processing steps are as follows:

1 of the original buried iron removal;

The 2 hole;

3 hole cleaning;

The 4 placement agent tube;

5 drill into the bolt;

The 6 gel process;

7 hardening process;

8 in the next three similar parts at the same time construction;

9 after 1 hours, field testing;

10 testing of all qualified;

The 11 fixed steel plates;

After the 12 plate with high strength micro-expansive filling material (compressive strength can reach C60).

Gallery of all the load function, through continuous observation, the point of deformation