1, date, weather, temperature, project name, construction site, construction content and main technologies adopted; Attendance and operation of personnel, materials and machinery
2, material consumption records, construction progress records; Whether the construction is normal; External environment and geological changes; Whether there is an unexpected shutdown; Is there any quality problem?
3. Construction safety; The presence of supervisors and the certification and signature of the project; Whether there are instructions and rectification from superiors or supervisors. The recorder should sign it, and the competent leader should read it regularly.
Examples are as follows:
On Friday, September 3rd, the sauna weather was overcast, which made people feel uncomfortable. Today's task is very heavy and important, that is, pouring columns.
Column is an important load-bearing component of frame shear wall in this residential area, which is used to bear the self-weight of roof truss and the resulting roof load. This project adopts automobile pump and commercial concrete.
In the pouring process, the hopper at the tail of the automobile pump is connected with the feed inlet of the commercial concrete transporter, and the concrete is pumped into the pump pipe, and finally the concrete is transported to the corresponding position through the pump pipe and its upper hose. Because the pouring ring beam surrounds the whole site and is close to the edge, it can be poured with the conveying pipe of the automobile pump fully and conveniently.
In the whole ring beam pouring project, the automobile pump has six parking positions. For concrete pump trucks, outriggers should be extended to support the ground. When necessary, stow wood shall be added under the legs to enlarge the supporting area and reduce the unit pressure. In order to prevent the pump truck from being unstable due to uneven falling of the legs when the pump truck rotates or the placing boom is used to pour concrete.
Before using concrete pump to pump concrete, start the machine to wet the pipeline with water, then pump cement or cement mortar, and then pump concrete after the pipeline is fully wetted. If concrete is pumped directly from the beginning, the pipeline will absorb a lot of water under pressure, which will obviously reduce the slump of concrete.
There will be a quality accident of pipe plugging. Therefore, the pipeline must be fully wetted before pumping concrete. When vibrating, the plug-in vibrator should be used for vertical operation, and the principle of "fast insertion and slow extraction" should be strictly followed. Fast insertion is to prevent the surface concrete from vibrating first and the lower concrete from vibrating. However, the concrete below is layered and isolated.
Slow pulling is to let concrete fill the gap formed when the vibrator is pulled out. In the process of vibrating, the vibrator should twitch slightly up and down to make it uniform. The vibrating time of the vibrating rod should be properly controlled, so that laitance will appear on the concrete surface, no bubbles will appear, and the surface will no longer sink. On September 4th, Saturday, it was sunny. This morning, Gong Li took me to study at a construction site.
Before dismantling the pillar on site, Gong Liu asked me to point out its shortcomings. I looked at it for a while and found no problem. Gong Liu pointed out three problems: first, from the outside, because the column was poured twice, the second formwork support was not accurate enough, and the upper part of the column was slightly smaller than the lower part, which was not noticed by inexperienced people.
But for experienced people, the problem can be found at a glance. Secondly, when pouring column concrete for the second time, the construction joints were not well done, resulting in slurry leakage, which led to root rot at the construction joints. Although plastering was done there later, and the structure was not affected, it was not allowed when evaluating the "Great Wall Cup Luban Award", which did not meet the requirements of the specification.
Next, I learned some questions about beam formwork that we haven't learned. First of all, when supporting the beam formwork, the inner side of the formwork should support a steel bar at regular intervals to prevent the beam side from jacking and acting on the column bolts.
Fold the inside of the template. At the same time, at regular intervals, set bolts on the columns and fix them on the beam side support and two steel bars close to each other on both sides, so as to keep the design thickness between the formwork, bear the lateral pressure and horizontal load from concrete, and make the formwork not deform.
Extended data:
The construction log has five main functions:
1, to ensure that the project can be traced effectively in the future, and a good memory is not as good as a bad writing.
2. Provide reference for possible engineering remedial and reinforcement measures in the future.
3. Provide a basis for engineering changes.
4. Provide the basis for the next working procedure.
5. Can accumulate rich experience in writing construction diaries.