KR20100035349A - Construction method of retaining wall using cast-in-place pile - Google Patents

Abstract

PURPOSE: An underground series retaining wall method of construction using a CIP construction method is provided to prevent an environment contamination problem by recycling steel material used in the construction of the retaining wall. CONSTITUTION: Ground is punched according to the installation position of a retaining wall and a plurality of casings(10) is inserted. A steel pipe(20) is inserted to the casing. A reinforcement assembly(30) is inserted to the other inside part of the casing. Concrete(40) is poured inside the casing and the casing is imprinted. The ground surrounded with the retaining wall is out dug. A steel pipe inserted into a part casing inside is drawn. A filler(50) is filled up the casing.

Description

Construction method of retaining wall using cast-in-place pile}

The present invention relates to an underground continuous mud wall construction method using a CIP method of constructing a mud wall by continuously driving a CIP pile among the cast-in-place concrete piles.

The retaining wall is a temporary structure installed for the purpose of preventing the collapse of the wall of oysters and the inflow of soil. It is a structure that requires safety and constructability as well as economic feasibility.

One of such a barrier wall (60) to drill holes in the ground, insert the reinforcing bar assembly (30) and the H-shaped steel (32), install a mortar injection tube, fill the gravel and inject mortar through the mortar injection tube As a result, there is an underground continuous mud wall using a cast-in-place pile (CIP) method to continuously form a pile in the ground.

Since the CIP method uses the H-shaped steel 32 inside the pile, the stability is higher than that of other methods. The CIP method is relatively simple in construction as a noiseless and vibration-free method, and is widely used as an earthen wall and a water barrier wall.

However, as can be seen in the plan view of Figure 1, in the case of the underground continuous retaining wall 60 is constructed by the conventional CIP method has the disadvantage that the H-shaped steel 32 is dead with the construction of the underground structure is uneconomical. In addition, the H-beams remaining in the ground can be corroded over time due to deterioration of durability of concrete such as salt damage, alkali aggregate reaction, and neutralization or the influence of external air on the H-beams itself. It may cause contamination.

The present invention, which was created to solve the above problems, recycles the steel used in the construction of the retaining wall, prevents the boss of H-beams, promotes economical construction, and at the same time flexibly copes with environmental pollution problems. To provide a method for constructing underground continuous wall using underground.

In order to solve the above problems, the present invention comprises the steps of: (a) inserting a plurality of casing after drilling the ground along the installation position of the wall; (b) inserting a steel pipe inside some casing, while inserting a reinforcing bar assembly inside another casing; (c) after pouring concrete into the casing, drawing the casing; (d) excavating the ground surrounded by the retaining wall; And (e) drawing a steel pipe inserted into the casing and then filling a filler into the casing; Provides an underground continuous mud wall construction method using the CIP method characterized in that consisting of.

In other words, the present invention can be economical construction and eco-friendly construction by drawing and reuse the steel used in the wall.

According to the present invention as described above can obtain the following effects.

First, in the case of constructing a retaining wall using the present invention, economical construction is possible by recycling steel pipes, and environmental pollution due to the boss of steel can be prevented in advance.

Second, in the case of constructing the retaining wall using the present invention, since the steel pipe having a closed circular cross section is used for the retaining wall during the construction of the underground structure, the external force can be effectively supported by the excellent cross-sectional performance of the steel pipe.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

Figure 2 is a plan view showing a step-by-step process of the underground continuous mud wall construction method using the CIP method of the present invention.

In the present invention, first, after drilling and ground stopping work is performed, (a) the ground is drilled along the installation position of the retaining wall 60, and then a plurality of casings 10 are inserted into the hole ((a) of FIG. )).

At this time, the drilling of the ground proceeds by using an earth auger or a hydraulic drilling machine, and excavates to a predetermined depth and discharges the ground soil.

In addition, the casing 10 is inserted into the hole in order to prevent the collapse of the hollow wall at the same time as the drilling of the ground.

Next, (b) the steel pipe 20 is inserted into the inside of some casing 10, while the reinforcing bar assembly 30 is inserted into the inside of the other casing 10 (Fig. 2 (b)).

Prior to insertion of the steel pipe 20 and the reinforcing bar assembly 30, it is preferable to remove the slime in the perforated ground in advance.

Steel pipe 20 in the present invention, as can be seen in Figure 2 (b), the reinforcing bar assembly 30 is inserted into the casing 10 located between the casing 10 to be inserted, the earth wall It acts to bear most of the moment and shear force acting on (60).

Here, the steel pipe 20 may be applied to the outer circumferential surface to facilitate the drawing later, and may be positioned in advance in the spiral tube 22 having a plurality of protrusions and protrusions formed on the outer circumferential surface.

In addition, the reinforcing bar assembly 30 is a cylindrical cylinder pre-assembled reinforcement to be inserted into the casing 10, and is slowly inserted into the ball so as not to collapse the wall while maintaining the verticality by using a drilling or excavator. Reinforcing bar assembly 30 may be attached to the spacer to ensure the coating thickness.

On the other hand, the upper end of the steel pipe 20 can be configured in a sealed structure so that the concrete 40 to be post-poured does not flow into the steel pipe 20.

Next, (c) after pouring concrete 40 into the casing 10, the casing 10 is drawn out (Fig. 2 (c)).

Before placing the concrete 40 in step (c), the slime treatment is performed again using an air lifter or an underwater sand pump.

In the concrete 40 pouring in this step, pre-installed injection pipes such as tremis pipes, thick aggregates are added, cement, fine aggregates, and water are mixed, and special mortars made of mixed ashes such as fly ash and aluminum powder are added thereto. It can proceed in the order of injection. However, the present invention is not limited thereto and may be replaced by placing concrete 40 after installation of the injection pipe.

Here, the casting of the concrete 40 proceeds continuously until one ball is completed, and the bottom of the trailing tube is poured from the bottom of the ball so as to keep about 1m buried in the concrete 40.

And (d) excavating the ground surrounded by the retaining wall 60 to complete the construction of the underground structure.

In general, the excavation of the ground to avoid the excavation affecting the strength of the concrete 40 until the concrete 40 cast in step (c) is cured.

Finally, (e) after drawing the steel pipe 20 inserted into the part of the casing 10, to fill the filler 50 in the casing 10 (Fig. 2 (d)).

As described above, when the steel pipe 20 is located inside the spiral pipe 22 having the irregularities formed on the outer circumferential surface thereof, the steel pipe 20 is relatively easily formed due to the adhesive force between the spiral pipe 22 and the concrete 40. I can draw it.

After the drawing of the steel pipe 20 is completed, the filler 50 such as cement milk is filled into the inner space of the casing 10 from which the steel pipe 20 is removed to perform backfilling.

Meanwhile, in the step (e), before filling the filling material 50 in the casing 10, the reinforcing bar assembly 30 may be inserted into the casing 10 to share the external force that the steel pipe 20 bears. .

FIG. 3 is a perspective view illustrating the retaining wall 60 constructed by the underground continuous retaining wall construction method using the CIP method of the present invention.

As can be seen in Figure 3, the CIP method will not be constructed so that the respective balls overlap, it will be necessary to provide a separate order measures between the main wall ball.

While the invention has been described in connection with the preferred embodiments as mentioned above, various modifications and variations are possible without departing from the spirit of the invention. Therefore, the claims of the present invention include modifications and variations that fall within the true scope of the invention.

1 is a plan view showing an underground continuous mud wall constructed using a conventional CIP method.

Figure 2 is a plan view showing the step-by-step process of the underground continuous wall construction method using the CIP method of the present invention.

Figure 3 is a perspective view showing a retaining wall constructed by the underground continuous retaining wall construction method using the CIP method of the present invention.

<Description of Major Symbols in Drawing>

10: casing

20: steel pipe

22: spiral tube

24: Lubricant

30: rebar assembly

32: H section steel

40: concrete

50: filling material

60: retaining wall

Claims (4)

(a) perforating the ground along the installation position of the retaining wall 60, and then inserting a plurality of casings 10; (b) inserting the steel pipe 20 into the part of the casing 10, while inserting the rebar assembly 30 into the part of the other casing 10; (c) drawing concrete 40 into the casing 10 and then drawing the casing 10; (d) excavating the ground surrounded by the retaining wall (60); And, (e) drawing the steel pipe 20 inserted into the part of the casing 10, and then filling the filler 50 into the casing 10; Underground continuous earthwall construction method using a CIP method, characterized in that consisting of. In claim 1, In the step (e), before the filling material 50 is filled in the casing 10, the underground continuous soil wall construction method using the CIP method, characterized in that the reinforcing assembly 30 is inserted into the casing 10. In claim 1, The steel pipe 20 is a lubricating oil 24 is applied to the outer circumferential surface, underground continuous mud wall construction method using a CIP method, characterized in that installed in the spiral pipe 22 formed with a plurality of protrusions and protrusions on the outer circumferential surface. In claim 1, Prior to the step (c), the upper end of the steel pipe 20, underground continuous mud wall construction method using the CIP method, characterized in that to maintain a closed structure.

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