With the rapid progress of urban and urban construction, new supporting system materials and construction techniques continue to emerge, which has improved the construction period, cost, safety and civilization of individual projects and reduced costs in an all-round way. In order to make all colleagues fully understand the cost-effectiveness of the new wheel-type steel tube scaffolding and the traditional fastener-type scaffolding, the following comparisons are made:
1. Speed up the construction period
Taking a 100m2 square meter house construction project as an example, the installation and dismantling of the traditional fastener-type formwork support frame is calculated according to the working time of 8 hours per day, which takes 1.5 days or 12 hours (requires 8 skilled workers and 4 general workers). The new wheel-type formwork support frame only needs 0.5 days, which is 4 hours (because the installation of the wheel-type formwork support system does not require the same time-consuming and laborious tightening of the fasteners as the traditional fastener-type formwork support frame; it only needs to be installed directly, right The requirements for workers are not high, only 1 skilled worker and 8 ordinary workers). Taking the current popular one-ladder four-family residential building to calculate: a unit is about 320m2, the traditional one-floor construction period is 4.8 days, the new-type one-floor construction period is 3.2 days, and the first-floor construction period is 1.6 days faster. Taking a 26-story residential building, the total construction period is accelerated by 41.6 days.
2. One layer of cost savings
a: Labor: The traditional fastener type support frame is calculated according to the above construction period: (8 skilled workers * 250 yuan / working day + 4 handymen * 130 yuan / working day) = 2520.00 yuan. The new wheel buckle type support frame is calculated according to the above construction period: (1*250 yuan / working day + 8 * 130 yuan / working day) * 0.5 = 645.00 yuan.
b: Materials: 1. Traditional fastener steel pipe: 320m2*3.8m*0.008 yuan/m (per day) = 9.73 yuan; fasteners: 320m2*3*0.007 yuan/piece (per day) = 6.72 yuan.
2. New wheel buckle steel pipe
320m2*3m*0.02 yuan/m (per day)=19.20 yuan. Binomial comparison: (9.73+6.72)-19.20=-2.75 yuan. By calculating and analyzing one layer, the labor cost can be saved by 1875.00 yuan, and the material cost can be increased by 2.75 yuan.
3. Analysis of hidden costs
The traditional scaffolding fasteners have large losses; they are easy to lose; the maintenance volume is large and the maintenance cost is high; the new type of wheel buckle steel pipe has no fasteners, basically no loss, and the maintenance amount is not large. According to the above analysis, the cost of the wheel buckle frame is higher than that of the traditional steel pipe scaffolding from the perspective of material leasing alone. However, the cost is analyzed from the total occupancy period. For example, the traditional steel scaffolding in the basement takes 28-30 days for the first floor, and the new wheel buckle steel scaffolding takes 23 days. The calculation result is (steel scaffold) (9.73+6.72) * 30 days = 493.5 yuan. (Roll buckle steel pipe scaffolding) 19.20*23 days = 441.6 yuan. The result is 493.5-441.6=51.9 yuan (taking the basement 320m2 as an example, the rental fee is saved by 0.16 yuan per square meter). Add labor cost savings of 1875.00÷ 320=5.86, comprehensive analysis: 5.86+0.16=6.02, a total saving of 6.02/m2 yuan
4. Safe and civilized construction
The spacing setting of the vertical rods of the traditional steel pipe scaffolding needs to be controlled manually to meet the standard. The spacing setting of the vertical rods of the wheel buckle type steel pipe scaffolding does not require artificial technology to control it, because it is designed and produced by the manufacturer. The length of the horizontal rod is uniform in size. Once it is made, it only needs to be typed according to the space size to meet the horizontal, horizontal and vertical standards. The stability of the traditional steel scaffold needs to be controlled by scissors, but the wheel buckle type steel scaffold does not need scissors, because its roulette is stuck with horizontal bars in four directions. In terms of on-site civilized construction and material management, the traditional fastener-type steel pipe scaffolding requires a larger site for material storage, because the steel pipe has many sizes and lengths, and the number of fasteners requires more investment in storage. Only manual construction can meet the needs of on-site civilized construction. The dimensions of the vertical and horizontal bars of the wheel-buckle steel scaffolding are designed and produced according to the size of the project space.
Introduction to the construction of multifunctional wheel buckle scaffolding
1. Introduction of wheel buckle scaffolding
The full name of the wheel buckle scaffold is the multi-functional wheel buckle scaffold, which is a new type of building support system derived from the socket-type disc buckle steel pipe bracket. Compared with the buckle type steel pipe bracket, it has the characteristics of large bearing capacity, fast construction speed, strong stability and easy management.
This product has been widely used in roads and bridges, municipal engineering, and is being widely used in housing construction projects.
2. Construction characteristics
1. Reliable two-way self-locking ability;
2. No moving parts;
3. It is convenient and quick to transport, store, erect and dismantle;
4. The force performance is reasonable;
5, can be adjusted freely;
6. Standardized product packaging;
7. The assembly is reasonable, and its safety and stability are better than those of the bowl buckle type and the portal type scaffolding.