The construction method of the ground bolt grouting is also stirred in the early stage. The problems that need to be paid attention to in the mixing process are as follows:
When mixing the cement base grouting materials, water should be added according to the requirement of the product.2. Cement grouting materials should be mechanically mixed.Add 2/3 water and mix for about 3min. Then add the remaining water and mix until smooth.If the product of AGM - 290 is specific, it should be mixed in accordance with its requirements.3. Mix and place close to the grouting site.
Bring about anchor bolt anchor grouting 1. The anchor construction technology of anchor bolt should be meet the following requirements: (1) a (2) a (3) clear water accumulation in the cleaning eye cleaning eye bolt surface oil and rust (4) insert the bolt to adjust fixed a (5) mixing AGM - 290 grouting material a 6 build an 7) curing a burning equipment installation.2. The anchor bolt hole, the level of the bolt hole deviation shall not be greater than 5 mm, verticality deviation shall not be greater than 5 ° of bolt hole wall should be rough, hole should be clean, must not have float ash, oil and other impurities, grouting before soaked in water for 8 to 12 h, clear water accumulation in the hole.When the environment temperature is lower than 5 ° C measures should be taken to preheat, keep temperature in more than 10 ° C.3. Remove grease and rust on the surface of anchor bolts before grouting.4. The position of the bolt can be adjusted according to the requirement when mixing the cement grouting material into the bolt hole.It is forbidden to vibrate in the grouting process. After the grouting is finished, the bolt should not be adjusted again.5. The surface of the perforated grouting layer should be about 50mm below the surface of the base concrete.
It is also important to pay attention to the maintenance after grouting grouting:
Daily average temperature is less than 5 ° C, winter construction should be according to the winter construction and meet the following requirements: 1. The measures should be taken to preheat before grouting foundation surface, to keep the temperature above the KTC, and clear water.2. The compressive degree of cement-based grouting material shall not be lower than 5MPa before the freezing.Grouting, high temperature climate environment construction site temperature is greater than 35 ° C, by high temperature climate to suspend construction and should meet the following requirements: 1. 24 h before the grout take measures to prevent grouting place under direct sunlight or other heat radiation.2. Take appropriate measures to cool, contact with cement grouting material and equipment of the concrete foundation slab temperature should not be greater than 35 ° C.3. The slurry into the mould temperature should not be greater than 30 ° C.4. Adopt moisturizing maintenance measures after grouting.