Prestressed pipe pressure slurry successfully solve the problem of grouting is not full

Settled satisfactorily prestressed pipe pressure slurry grouting is not full to have this kind of problem, now called the vacuum grouting! But now the vacuum grouting skills are not very well with prestressed pipe grouting after full condition. 1, vacuum grouting; 2, the initial setting for the first time when the second fill pressure grout. The original poster is a practice question, proposed usually in construction, the question is not satisfied to notice, basic is horse horse MCE, no broad. As to how to ensure that grouting plump, one is vacuum grouting, but somewhat tedious to practice operation, the last time, vacuum pumping air flow in the situation. The other is vacuum machine vulnerability is also a headache. If real do vacuum grouting, compaction degree is still very good. Second is generally grouting method, the plasma tube stay longer, adopt ball valve lock pulp, stay slurry initial setting under the valve again, interval fill pressure, is good idea. The other is to ensure consistency of slurry, is also very crucial grouting is not full, there is no one to take a closer look at substance and after this is today's professional practice habits! Put forward the question, because provincial scientific research departments through years of practice, the query method of tens of thousands of post-tensioned prestressed duct grouting practice situation to draw conclusions, might as well put some related results listed here: 1, choose high pressure grouting, there are a variety of different degree of not full sight to 92 of the total number of queries. 5%; 2, choose new materials ( Now existing in the market) Grouting, not full sight to 94 of the total number of queries. 2%; 3, selects the conventional way of grouting, not full sight to 98 of the total number of queries. 1%; The importance of the duct grouting don't need too much emphasis on here, as long as it is to make the professionals we should all know. Therefore, the individual feels it is necessary to discuss this topic. I also am engineering personnel, for tunnel grouting post-tensioned method is also make a lot of, but really didn't pay attention to such questions before. Now let's also take this subject as a research target, the attention in the construction, of course, also please experienced net friend glad, so that the vacuum grouting, we studied together at the top of the left vent measures such as processing not plump. Personally think that the main the slurry question. The slurry is too thick, in the hot sun, extreme simple tube. The slurry is too thin, must not fullness. The solution path should start from the new direction of fill material, prestressed pipe pressure slurry replacing cement this unstable data.