KR100513072B1 - form defense-water - Google Patents

Abstract

At present, there are many construction methods for earthwork and foundation work in construction field. There are various methods such as earthquake method, water block method, earth block + water block method, and we have been doing a lot of construction so far using these methods. It is up to the engineer to apply such a method, which is determined by considering the environmental conditions such as soil composition, groundwater presence, pit depth, size of construction site, construction cost, and construction period, but it is most desirable to have a method that satisfies both safety and economic efficiency. something to do.

Conventional methods include steel sheet pile method, various underground continuous wall method, various chemical methods, and order method. Most of them use soil and water barriers, and even water barriers are expensive and large scale.

Therefore, this method differentiates from various methods used in existing large-scale buildings, and by applying the water barrier method to small-scale structures, the construction industry needs to solve various problems such as improvement of construction efficiency, cost reduction, reduction of air, and destruction of environment. I should get rid of it. The water blocking method using the Eurofoam is a method of squeezing the Eurofoam into a box shape to immerse it in water and preventing water. The problem to be solved in this method is to prevent water from flowing in the gap between the Eurofoam and the Eurofoam. 3) Applying existing Eurofoam and iron plate, etc. to close the water deeper, Fig. 4.5) Installing a box made of Eurofoam in water and safe and not breaking when pulling out of the box, Fig. 6) From the bottom It is a problem to block the rising water and to prevent the box from rising from buoyancy when the water in the box is removed. To solve this problem, install rubber expansion index material (1cm * 2cm) between euroform and euroform as shown in the figure 2) and assemble the Eurofoam into the box to immerse the box in the water while the rubber foam is in the water. It expands to prevent water from penetrating the joint of the eurofoam.

As shown in Fig. 3, the angle is reinforced to the steel on the back of the Euroform to prevent the damage of the Euroform during installation / drawing of the box, and the steel plate is reinforced to a certain depth at the bottom to enable the work to a deeper depth (1.5m). PE film and vinyl tents are installed inside the Euroform to act as a release agent during box drawing. Figure 4.5) is to install a box reinforced with angles and squares in water safely. As shown in Fig. 6, the water pressure of the water coming from the bottom can be prevented by casting the discarded concrete using the hose of the pump car. Figure 7 is to reduce the buoyancy by performing a first backfill to prevent the box rises to buoyancy by removing the water in the box after casting concrete.

Therefore, the main intention of this method is to use the Eurofoam, which is used only on the ground, in combination with the rubber expansion index material, and to use it as a water barrier material, which is useful for small-scale construction, factory construction, mechanical foundation work, and coastal landfill construction. With the advent of such construction methods, we will use the customized earthwork / base construction methods appropriate for each building size, construction cost, air, etc. to achieve construction improvement, air reduction, and cost reduction.

Description

Form defense-water method using Euroform

This method is a method of closing the water with a simple construction method and materials, the soil barrier and water barrier method we currently use a lot. However, these methods are mostly expensive and require a lot of air, and most of them are a combination of soil and water barriers. In large-scale construction or a large space, the existing method is efficient because of the large amount of air or money, and can show superiority in terms of air reduction / cost reduction. But if there is a large construction, there is a small construction. Small-scale construction is more active than large-scale construction, and will continue in the future, and the construction of factories in coastal landfills will also take place. Sometimes we know the groundwater level while we are doing the construction, and often meet the water while doing the construction without preliminary examination with small capital.

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At this time, where the groundwater level is deep or the area of the structure is large, the existing soil and water barrier method should be used, but the lower part of the structure is 1-1.5m from the surface of the water, and the area of the structure is narrow (width * length is 5m * 5m). In the following, general methods are considered to be expensive and not conducive to air shortening. Is the structure small in size and does not require a clogging, and is it necessary to use an unnecessary clogging and consume air / cost in a condition where only a clogging is needed?

In addition, the general construction method may interfere with the operation of other processes due to the input of heavy equipment, material transportation and loading place, and securing the loading place, and it is more incidental than the actual construction time such as rapid processing of material after drawing and securing drawing equipment. In terms of time, work space and cost. Although this technique is slightly improved and used in a limited space, it is possible to prevent environmental complaints and other processes by preventing civil complaints due to low cost, shortening of air space, securing a working space, and noiseless operation. It will be called a feature.

This method is designed to solve the unreasonable aspect of the existing method, regardless of the size of small and large, to improve the constructability, reduce the air, reduce the cost, realistic, environmental protection, and quality. There are many ways to improve. Now, the customized method must be developed in the construction method, and the construction quality, cost, working air, and construction method suitable for the characteristics of the work must be adopted to improve the quality of the construction and cost reduction. This method can work with materials (eurofoam) used in the field, it can work by welding steel plate, etc., and it has the applicability to work by using Euroform and iron plate together. This method is based on the use of Euroform, and it is possible to apply it according to the depth of water level by reinforcing steel plates, etc., and to make a simple box (box) in a narrow space, and to keep the box made as it is. By sitting, it can be seen that the construction is simpler than the existing construction method. It is a method of inserting a box after the completion of the excavation by inserting a box after the excavation is done in the space next to the excavation from one side. Excellent in terms of The material used in the work uses the Euroform on site, and it is commonly used in construction sites such as angles, rubber expansion index materials, PE film or vinyl tents, some sand, wood, water pumps, etc. It is excellent in terms of cost reduction compared to other methods because equipment is all about backhoe for dig, cargo crane required for insertion and drawing of Euroform. Using the basic principles of this method, it can be applied immediately to plant machinery foundations and factory foundations of coastal landfills and foundation works of small-scale work sites. The spraying of sand (bottom surface) removes impurities from the bottom of the box to contaminate the water, and there is no special noise, so there are no complaints caused by noise pollution. In terms of the quality of the structure, it is considered that there is no drop compared with other methods. Since no special materials are needed, it is thought that it would be easy to solve the problem of encountering water with a depth of 1-1.5m or less.

Cautions for the application of this method can be used only when the width of the structure is 5m * 5m or less, and it can be used only where the structure goes down 1m or less from the surface with the existing Euroform. However, if the steel plate is welded to the steel on the back of the Euroform, work can be made deeper. Water pollution due to poor construction should be prepared (such as sand spray), and basic knowledge of water pressure and buoyancy is required. It can not be used in areas where damage to surrounding buildings due to trench construction is expected, and there is no noise because there is no noise.

Hereinafter, described in detail by the accompanying drawings as follows.

As shown in Fig. 1, the bottom line of the structure is displayed on the surface of the structure by an accurate measurement, and the trench is carried out. At this time, the width of the lower part of the trench should be about 1m more than the size of the structure (the width of the lower surface of the structure is 3m * 3m and 5m * 5m) .If the lower depth of the structure 1) is 900mm from the water surface, the trench is 1100mm- Work around 1200mm and stop as horizontally as possible. The 200mm-300mm margin of the floor is the depth for sand spraying4) and cast concrete13). Sand spraying not only serves to match the level of the floor, but also prevents water pollution when contaminants are spilled out when casting concrete inside the box.

At the same time as the trench, the box work for installation in water as shown in Fig.

Put the rubber expansion index member 6) between the euroform and the euroform as shown in Figure 2. When the foam is installed in water, the rubber expansion index member 6) comes into contact with water and its volume expands over time To prevent gaps caused by the assembly of the Euroform and the Euroform.

Figure 3 is to weld the box reinforcement angle (7) to the steel on the back of the euroform so that the box is not damaged when the box is installed and drawn. By welding the reinforcing plate 8) for deeper work, it can be applied to the change of depth 10 by supplementing the disadvantage of the limitation of the depth of the euroform. (Eurofoam use depth is 900mm-1000 It can be up to 1500mm in depth when iron plate is supplemented.) PE film or vinyl curtain 9) acts as a release agent during the drawing of the box.

As shown in Fig. 4, the size of the box is one more (600 mm or 300 mm) of the euro foam to the left and right than the structure, so that there is a margin even if the box is slightly moved due to external pressure or impact during construction, thereby improving the workability. Brace 11) and frame deformation prevention support 12) are installed at each corner to prevent deformation when inserting the box.

Rotate the angle 7) around the box to reinforce the box and prevent the mold from being damaged when the box is inserted or removed by the crane. This work creates a well.

The box made outside as shown in Fig. 5 is lifted by a crane to enter the water. At this time, four people grasp the rope installed at each corner so that the box can be installed safely. One person is instructed to be installed in the correct position by looking at the bottom line of the structure marked on the transit or ground.

If the box is not level, use the equipment to stop the area and reinstall it.

Fig. 6 is to cast the discarded concrete 13 in the installed box, it is thought that the concrete may be good after placing the wire mesh after installing the wire mesh on the floor before placing. The concrete strength is 180kg / cm ² or more and preferably 210-240kg / cm ² for safer working. Slump should be less than 10cm. In principle, pump cars should be used for pumping. Soak hoses in water and place them at the same time. Check the thickness of the concrete with a tape measure or staff to avoid placing a large amount in one place. The angle 7) installed on the upper part of the box can be further reinforced to allow the person to walk and measure the depth. Curing should be at least 4-5 days after pouring, and if it is cured for a week, it can be surely followed. Otherwise, if the water inside is pumped, the concrete at the bottom is damaged by water pressure and buoyancy, and it does not become a water block. At this time, find the damaged part and put concrete to cure again, but it is not a perfect water block. Therefore, it is important to avoid hasty pumping operations and to maintain adequate concrete thickness.

Figure 7 is the step of pumping the water in the box to the pump 15) after the first backfill 16) to remove the water to the pump. When backfilling, care should be taken to prevent abnormality in the adhesion between the box and the concrete due to impacts on the box or impacts. Backfilling reduces water pressure inside and outside and prevents the box from rising from buoyancy. When pumping, use a small water pump, and draining a lot of water with a large water pump at once should be avoided because it can strain the concrete due to the hydraulic pressure difference. Debris removal from the floor17 must be done and evenly removed when removing Leytans17 on concrete. If you build a waterway outside the floor concrete and install a water pump in one place, it will not interfere with the work even if fine water comes out.

As shown in Fig. 8, when the water barrier is successfully completed, the foundation reinforcement and concrete placement 18 are performed. As described in Figure 3 above, PE film and vinyl tent (releasant role) may be constructed at this time. If the structure of the foundation does not matter, it is possible to use the box as the foundation frame without installing the foundation frame separately. When installing the foundation frame, the box itself has a width of 60cm left and right than the foundation, so there is no problem to work.

Fig. 9 is the first retaining wall concrete placing 20) the height of the cast is 200mm-300mm higher than the water surface to enable the work on the ground after the second backfill 22).

Fig. 10 shows the PE film and the plastic tent 9) inside the box when drawing by the second backfill 22) and the box drawing 23). Complete the structure of.

As described above, this method is a method of maximizing work efficiency while minimizing time and cost by using materials and equipment that can be supplied quickly and on-site in the field. This is the finishing method.

Eurofoam is not only used on the ground but also rubber expansion index material is installed at the joint part of Eurofoam and Eurofoam, so it can be used as a material of water barrier, which will help a wider use of materials and thereby save time, space and cost. .

Although this method may be used intentionally, if the construction meets unexpected water, the method may have a significant effect, and it will be able to reduce the air, reduce costs, and improve construction efficiency with faster response. have. Since there is no special equipment or materials, space can be secured, and it is considered that there is considerable benefit in many ways by not disturbing surrounding subsidiary works. "Water in the ground" It is now thought to be possible to create a better construction environment by reducing the unnecessary manpower, air, cost, and noise by applying a tailored barrier method for its depth and area.

1) is a plan view and a cross-sectional view showing the state of the structure, the trench area and depth, and the water level during the trench

2) is a plan view showing that the rubber is inflated after inserting the rubber expansion index material between the euro-foam

3 is a cross-sectional view for applying or reinforcing a box

Figure 4 is a plan view of the box made through Figure 2.3

Figure 5 is a side view showing the process of dipping the box made in water

Figure 6 is a side view showing the process of casting concrete thrown away using a pump car

Figure 7 is a side view showing the process of backfilling and pumping after curing

Figure 8 is a side view showing the process of pouring the foundation concrete

Figure 9 is a side view showing the process of pouring the primary retaining wall concrete

FIG. 10 is a side view illustrating a process of drawing a second backfill and a euroform (box); FIG.

* Explanation of symbols for main parts of the drawings

1. Structure 2. Dig top line 3. Dig bottom line 4. Sand spray

5. Euro foam 6. Rubber expansion index 6-1. Rubber in contact with water

7. Angle of box reinforcement 8. Reinforcement steel plate applied for depth change of euro foam

9.PE film or vinyl curtain 10. Depth change using reinforced steel sheet

11.Brace 12.Form deformation prevention crutch 13. Cast concrete pouring

14.Water level change due to pumping work 15.16.1 backfilling of water pump

17.Removal of foreign substances on the floor (Raytans, etc.) 18.Placement of foundation reinforcement and concrete

19.Retaining wall reinforcement 20.1 tea retaining wall concrete pouring 21.Box drawing

22.2nd backfill (stone powder and mixed stone) 23.Other operations such as waterproofing

Claims (2)

Breakage of the box with a reinforcement angle (7) by making a well box on the ground using a rubber water expansion index material (6) between the Euroform (5) and the Euroform, which is useful in construction work in small-scale structures below the surface of water. In the well construction method including a normal first step of preventing the A second step of installing a well bucket made of a flow path 5 using the crane after the first step; A third step of pouring the discarded concrete 13 of the corresponding height into the well bucket; A fourth step of performing a peripheral backfill 16 operation to prevent breakage of the well bucket and the bottom cast concrete 13 due to water pressure and buoyancy; After the refilling (16) through the curing period to remove the water in the well container using the water pump (15) and then remove the foreign matter in the bottom (17) and inside the well After the installation of the film (9), the fifth step of performing concrete pouring (18) in sequence by reinforcing the foundation and retaining wall reinforcement: A sixth step of drawing out the well box 21 after the concrete curing of the structure and performing a second backfill 22; Water barrier construction method using the euro foam, characterized in that consisting of. The method of claim 1, wherein installing a steel plate on the back side of the euroform so as to work deeper by reinforcing the disadvantage of the depth of the euroform.