KR100849226B1 - C.i.p temporary wall and method for constructing thereof - Google Patents

Abstract

A temporary retaining wall by CIP and a construction method of a temporary retaining wall by CIP are provided to reduce the quantity of filler used by preventing a support inserted to a rock layer and supported to a soil retaining wall from being filled with filler, to exclude the necessity of removing filler filled in a support when installing a soil retaining plate, and to fill up filler evenly by inserting a reinforcing bar in the center of a steel pipe. A temporary retaining wall by CIP comprises steel pipes for a support inserted and installed to the ground at regular intervals, steel pipes for a reinforcing bar arranged in a row between the steel pipes for a support, piles(10) inserted to the inside of the steel pipes for a support and fixed by filler, reinforcing bars(20) inserted to the steel pipes for a reinforcing bar and fixed by filler, soil retaining plates(30) arranged between supports to be supported by the piles and piled in multistage, and a closing plate(40) installed in the middle of the support to cut off filler not to be filled in a rock layer(6b). A construction method of a temporary retaining wall by CIP comprises the steps of: perforating holes along the shape for constructing a retaining wall under the ground using a boring machine; arranging and inserting steel pipes for a support at regular intervals, and inserting steel pipes for a reinforcing bar between the steel pipes for a support in a row; inserting piles and reinforcing bars respectively; filling up the inside of the steel pipes for a support and the steel pipes for a reinforcing bar with filler; and after curing the filler, drawing out the steel pipes for a support and the steel pipes for a reinforcing bar from the ground, and inserting two sides of a soil retaining plate to a soil retaining plate insertion groove of the support, thereby piling up soil retaining plates in multistage.

Description

Temporary earthenware temporary installation by CCP and this construction method {C.I.P TEMPORARY WALL AND METHOD FOR CONSTRUCTING THEREOF}

The present invention relates to a temporary earthquake temporary construction that is constructed in the ground to prevent the collapse of the ground during civil construction work, and more specifically, when the earth plate is installed between the pillars of the filling material to prevent the filling material is filled, reducing the amount of filling material and earth plate The present invention relates to an earthquake temporary installation by CIP and to a method of installing the same, in which the work of removing the filling material filled in the fitting portion is not performed.

In general, in the construction of underground excavation of a construction or civil engineering site, excavation of soil to a predetermined depth, and then construction of an earthen wall along the trench surface to prevent the collapse of surrounding soil until the structure is formed. Is being implemented.

In the case of such a wall, the wall must be prevented from collapsing due to the earth pressure of the back soil by having sufficient rigidity. In order to prevent ground subsidence, it is especially required to be ordered. In view of the above, the conventional earthenware coating method has been developed in various ways. Such conventional earthenware construction methods include H-PILE and earth plate method, CIP method, SWC method, sheet pile method and underground continuous wall (SLURRY WALL). The method is representative.

CIP (CAST IN PLACE PILE) method is a kind of cast-in-place casting pile method, which drills a hole with a predetermined diameter on the ground using a boring machine or the like, and reinforces the reinforcing steel assembly or the H-shaped steel in the drilled hole. After inserting a reinforcement such as a pile, the remaining portion is filled with gravel and the filling material (for example, cement, ready-mixed concrete) by pouring a method of forming the earth wall. However, in the case of the above method, it is possible to construct an earthquake even in a narrow working space and has a large rigidity compared to the cross-sectional size.

In more detail, the CIP method, as shown in Fig. 1, drills a hole in the ground, and the circular steel pipe 1, 2 (for convenience, the steel pipe 1 has a post 3 (e.g., an H beam)). The steel pipe (2) is inserted into the reinforcing steel bar (4) is inserted in a row, and the struts (3) are respectively inserted into the first steel pipe (1) spaced at regular intervals and the remaining second steel pipe ( 2) each of the reinforcing bars 4 (consisting of a plurality of longitudinal bars 4a arranged in the circumferential direction and a band bar 4b supporting the bars 4a), respectively, followed by a steel pipe 1, 2) The filling material (5), etc. are injected into the inside to cure. At this time, when the ground 6 consists of the soil layer 6a and the rock layer 6b, the second steel pipe 2 and the reinforcing bar 4 are inserted only to the soil layer 6a, and the support 3 is up to the rock layer 6b. The earth plate 7 is provided in multiple stages to the predetermined depth in the rock layer 6b. The earth plate 7 is installed by inserting both sides into the support 3, respectively.

However, according to the conventional CIP method, there are the following problems.

In order to install the earth plate 7 in the rock layer 6b, as shown in FIG. 2, since the filler 5 is filled in the inside of the support 3 (a groove into which the earth plate 7 is fitted), the earth plate inside the support 3 There is a problem that unnecessary follow-up work to break the filling material (5) to insert (7) is followed.

In addition, the filling material 5 filled in the support 3 in the rock layer 6b as well as inconvenient in operation as described above does not need to be filled because it is removed for the installation of the earth plate 7, but in terms of the structure of the support 3. Since the pillars 3 of the rock layer 6b have to be filled with the filler 5, there is also a problem in that the cost of using unnecessary filler 5 is wasted. In addition, when removing the filling material filled in the earth plate insertion groove of the support (3), if the support (3) may be damaged or if the filling material cannot be removed cleanly, the earth plate (7) is not firmly fitted to the support (3) and the earth plate (7). Since there is a gap between them, there is a problem that the order and prop effect are reduced.

In addition, the inside of the second steel pipe (2) is filled with earth and sand may be clogged in some sections, this will cause the reinforcing reinforcement (4) is not placed in the center of the second steel pipe (2), bending or eccentricity to one side As a result, the filling material 5 is not evenly filled and eventually fails to maintain the design strength of the retaining wall. There is also a problem in that the filling or collapse of the retaining wall may be caused.

The present invention is to solve the above problems, inserted into the rock layer and the support plate is supported by the earth plate so that the filling material is not filled to reduce the use of the filling material and do not perform unnecessary work of removing the filling material filled in the holding column when the earth plate is installed. The purpose of the present invention is to provide a temporary barrier and a construction method by CIP.

In addition, another object of the present invention is to insert the reinforcing bars in the soil layer between the struts is inserted into the center of the steel pipe so that the filling material is evenly filled.

According to the present invention for achieving the object as described above, the earthenware temporary equipment according to the CIP, the steel pipe for the support / reinforcement is inserted in a line in the ground; A post which is inserted into the earth and sand layers from the ground through the support steel pipe and fixed by the filling material which is filled in the support steel pipe, and the earth plate insertion grooves are provided at both sides; A reinforcing steel being inserted into the steel pipe for reinforcement and fixed by a filling material; It is installed in the middle of the strut corresponding to the boundary line between the soil layer and the rock layer of the ground and characterized in that it comprises a blocking plate to prevent the filling material filled in the steel pipe for the strut to block the earth plate insertion groove of the strut .

According to the earthquake temporary installation according to the CIP according to the present invention and this construction method, since the filler plate is not filled in the earth plate insertion groove of the support corresponding to the rock layer on which the earth plate is installed, the use of the filler can be reduced and the construction of the earth plate can be reduced. In order to reduce the construction cost and shorten the air by eliminating the unnecessary work to be removed by manually removing the filling material filled in the earth plate insertion groove.

And, it is possible to prevent the damage of the strut generated when the removal of the filling material filled in the earth plate insertion groove of the strut and the earth plate can be firmly bound to the strut without lifting.

In addition, since the reinforcing bars are disposed at the center of the inside of the steel pipe, the filling material is uniformly filled in all parts of the steel pipe, thereby effectively preventing the collapse of the ground and making it easier to insert the reinforcing bars.

As shown in FIG. 3, the earthenware temporary installation by the CIP according to the present invention is inserted into the ground and is arranged in a line between the support steel pipes (1) and the support steel pipes (1) which are installed at equal intervals. Reinforcing steel pipe (2), Shoring (10) inserted into the holding steel pipe (1) and fixed by the filling material (5), inserted into the steel pipe (2) for reinforcement and fixed by the filling material (5) The reinforcing bar 20, the earth plate 30 which is disposed between the support posts 10 and is supported by the support posts 10, and is stacked in multiple stages, and the filling material 5 is installed in the middle of the support posts 10 to form a rock layer 6b. It is configured to include a blocking plate 40 to block the filling.

Since the holding steel pipe 1 and the reinforcing steel pipe 2 are the same as in the related art, detailed description thereof will be omitted.

As shown in FIG. 4, the strut 10 has a structure in which the earth plate inserting grooves 11 are formed on both sides (both sides on which the earth plate 30 is fitted), and may be, for example, existing "H beams". That is, the strut 10 is not only used as the H beam, but all structures having the earth plate insertion grooves 11 into which the earth plate 30 is fitted are possible.

The strut 10 is inserted from the soil layer 6a to the rock layer 6b of the ground 6. This is because the earth plate 30 is provided in the rock layer 6b.

As shown in Figure 5, the reinforcing bar 20 is a plurality of longitudinal reinforcing bars 21 (shown in the figure 5) arranged at regular intervals along the circumferential direction, a mutually constant height to the longitudinal reinforcing bars 21 It is arranged in multiple stages and fixed to the longitudinal reinforcing bars (21) and the outer circumference is composed of the center holding area in contact with the inner circumferential surface of the steel pipe (2).

As the center holder, a plate-shaped center holder ring 22 and a band reinforcing bar 23 may be used.

First of all, the center retaining ring 22 is to allow the reinforcing bar 20 to be disposed at the center of the steel pipe 2 for the reinforcing bar, and the body 22a to which the longitudinal rebar 21 is fixed to the circumference of the body 22a. It may be formed of a center holding projection (22b) end is supported on the inner peripheral surface of the reinforcing steel pipe (2).

The body 22a is preferably annular so that the filling material 5 may be filled therein, and for example, the reinforcing bar 22c may be formed to penetrate up and down to fix the longitudinal reinforcing bar 21. The reinforcing fastening hole 22c is not limited to penetrating up and down, but may be replaced by a groove open toward the center on the inner circumferential surface of the annular body 22a.

As shown in FIG. 5A, a plurality of center holding protrusions 22b may be formed at equal intervals along the circumferential direction on the outer circumferential surface of the body 22a. However, the center holding protrusion 22b is not limited to the shape, size, and quantity shown in the drawings. Of course, when the reinforcing bar 20 is inserted, the center holding protrusion 22b may be interfered with by foreign matters such as soil adhered to the inner circumferential surface of the steel pipe 2 so that the center holding protrusion 22b is reinforced. It is desirable to be formed in a minimum size and quantity capable of aligning the center of the rebar 20.

The strip reinforcing bar 23 is a normal reinforcing bar, and a center holding protrusion 23a is provided at the periphery of the strip reinforcing bar 23 as shown in FIG. 5B. The center holding protrusion 23a may be welded to the outer circumferential surface of the band reinforcing bar 23 or wound around the band reinforcing bar 23.

The longitudinal reinforcing bars 21 may be arranged in a circle, a square, a triangle, and the like in plan view. Accordingly, the center retaining ring 22 and the band reinforcing bar 23 are not limited to those shown in the drawings. 21, it may be formed in a circle, a square, a triangle or the like.

As shown in Figure 3, the earth plate 30 is a conventional product that was used as is conventionally used as it is installed only in the rock layer (6b).

The installation structure of the earth plate 30 is inserted into and fixed to the earth plate insertion grooves 11 of the two struts 10 adjacent to both sides of the earth plate 30, and a plurality of them are stacked in multiple stages.

The blocking plate 40 is disposed between the outside of the support 10 and the inside of the support steel pipe 1 so that the filler 5 is not filled in the earth plate insertion groove 11 of the support 10 into which the earth plate 30 is inserted. For this function, for example, as shown in FIG. 6A, a pillar insertion groove 41 may be formed, and the diameter may be a plate shape that matches the inner diameter of the steel pipe 1 for the pillar.

Since the support insertion groove 41 is formed to penetrate up and down, the blocking plate 40 is inserted from one side of the support 10 to be moved to a desired position and then fixed by welding or the like.

As illustrated in FIG. 6B, the blocking plate 40 may be formed in a symmetrical shape around the support 10 and may be formed of first and second plate members 42 and 43 fitted into and coupled at both sides of the support 10. That is, the first and second plate members 42 and 43 are joined to each other in the support 10 corresponding to the boundary between the soil layer and the rock layer, so that the installation of the blocking plate 40 is completed. You don't have to move from one side to the place you want (corresponding to the boundary between the soil and rock layers).

6C and 6D, the blocking plate 50 is not supported on all of the inner circumferential surface of the support 10, so that only the space in which the earth plate 30 of the support 10 is inserted can be blocked so that the support steel pipe 1 Fill the remaining space in) with the filler (C). This structure prevents buckling because no empty space is formed in the ground. The blocking plate 50 extends from the first blocking portion 51 and the first blocking portion 51 which are inserted into the earth plate insertion groove 11 in the support 10, and the support 10 and the support steel pipe. It consists of the 2nd blocking part 52 which blocks between the inner peripheral surfaces of (1).

In addition, as shown in Figure 6e, the blocking plate 50 is formed on both sides of the bottom of the second blocking portion 52, respectively extending downward to block the gap between the support 10 and the steel pipe (1) filling material is the earth plate insertion groove ( 11 may be further included a pair of wings 53 to block the flow.

Climbing construction method according to the CIP according to the present invention is as follows.

(S10) hole perforation.

In accordance with the design drawings of the subway, buildings, etc., boring is used to drill holes along the form for constructing the earthen wall in the ground. When designing the retaining wall, the position of the support 10 is already determined, and when the hole is drilled, the hole into which the support 10 is inserted is drilled through the soil layer 6a to the rock layer 6b, and the reinforcing bar 20 is The hole to be inserted is drilled only up to the soil layer 6a.

(S20) Inserted steel pipe for holding and reinforcing steel pipe.

The holding steel pipe 1 and the reinforcing steel pipe 2 may have the same shape, structure, and size, and are given different names and reference numerals for convenience of description. The holding steel pipes 1 are arranged and inserted at regular intervals, and the reinforcing steel pipes 2 are inserted in a row between the holding steel pipes 1.

(S30) Shoring and rebar insertion.

Insert struts 10 and reinforcing bars 20 respectively. The depth of the hole and the size of the support 10 have already been estimated through structural review, and the blockage plate 40 is formed on the support 10 by checking the boundary between the soil layer 6a and the rock layer 6b through geological investigation. Prepare the struts 10 by combining.

When the support 10 is inserted into the hole, the blocking plate 40 is disposed at the boundary between the soil layer 6a and the rock layer 6b.

When the reinforcing bar 20 is inserted into the reinforcing steel pipe 2, the center holding protrusion 22b is supported (or close to) the inner circumferential surface of the reinforcing steel pipe 2 so that the reinforcing bar 20 is the reinforcing steel pipe 2. Can be inserted along the centerline.

When soil is fixed to the inner circumferential surface of the reinforcing steel pipe 2 when the rebar 20 is inserted, the center retaining protrusion 22b may be caught by the soil and the insertion may be stopped. In this case, the center of the rebar 20 is turned to turn the center. The reinforcing bar 20 may be continuously inserted to prevent the retaining protrusion 22b from interfering with the soil.
Up to now, the installation of the holding steel pipe (1), the reinforcing steel pipe (2) has been described as installing the support (10) and reinforcing reinforcing bars (20), respectively, but the process order is not limited to this, the holding steel pipe ( 1) Installation-Shoring (10) installation-reinforcing steel pipe (2) installation-reinforcing reinforcing bar (20) may be in the order of installation.

(S40) Filler Fill.

Filling material (5) is filled into the holding steel pipe (1) and the reinforcing steel pipe (2), respectively. Since the inside of the holding steel pipe 1 is blocked by the blocking plate 40, the filler 5 is filled only above the blocking plate 4. That is, the filling material is not filled in the earth plate insertion groove 11 in the lower portion of the blocking plate 40 on which the earth plate 30 is installed.

Filler 5 injected into the reinforcing steel pipe (2) is injected from above the rock layer (6b) is filled into the reinforcing steel pipe (2), at this time, even if the injection pressure of the filling material is generated of the reinforcing steel (20) The reinforcing bar 20 is maintained by the center retaining ring 22 in the center of the reinforcing steel pipe 2 inside. That is, the filling material 5 is filled in the holding steel pipe 1a and the reinforcing steel pipe 2 corresponding to the soil layer 6a, so that the steel pipes 1, 2, the support 10 and the reinforcing bars in the soil layer 6a. The large bracing stiffness of the retaining wall by 20 can be secured to prevent the collapse of the ground.

(S50) Earth plate installation.

When curing of the filling material is completed, the holding steel pipe (1) and the reinforcing steel pipe (2) is drawn in the ground, and both sides of the earth plate (30) is inserted into each of the earth plate insertion grooves 11 of the adjacent support (10) Thus, the earth plate 30 is laminated in multiple stages.

After drawing the holding steel pipe (1) and the reinforcing steel pipe (2) and fill the space occupied by the respective steel pipe (1,2) and finishes.

1 is a construction state diagram of the earthenware temporary construction according to the prior art.

Figure 2 is a perspective view of the excerpts showing the relationship between the earth plate and the support in the earth retaining provisions according to the prior art.

Figure 3 is a construction state of the earthenware temporary installation according to the CIP according to the present invention.

Figure 4 is a perspective view of the strut applied to the retaining wall according to the CIP according to the present invention.

Figure 5a and Figure 5b is a perspective view showing the center holding area applied to the earthquake tents according to the present invention, respectively.

6a to 6e is an exemplary view of the blockage plate applied to the earthenware temporary installation by CIP according to the present invention.

<Description of Signs for Main Parts of Drawings>

10: prop, 20: rebar

21: longitudinal rebar, 22: center retaining ring

30: earth plate, 40, 50: blocking plate

51,52: Block,

Claims (7)

Inserted into the ground at equal intervals and inserted from the ground surface to the soil layer and the rock layer through the holding steel pipe (1) drawn before curing of the filling material, and fixed by the filling material (5) filled in the holding steel pipe, respectively. A support 10 provided with an insertion groove 11; A reinforcing bar 20 inserted in a row between the holding steel pipes and inserted into the reinforcing steel pipe 2 drawn before curing of the filling material, and fixed by the filling material; It is installed in the middle of the strut corresponding to the boundary between the soil layer (6a) and the rock layer (6b) of the ground and includes a blocking plate to block the earth plate insertion groove of the support so that the filler material is not filled in the earth plate insertion groove, The blocking plate is formed of a groove 41 is fitted with the support is coupled to the support while the circumference is temporarily supported by the CIP, characterized in that the plate is supported by the steel pipe for the support. According to claim 1, wherein the blocking plate (40) is formed in a symmetrical center around the support, and the earthquake tentacles by CIP, characterized in that consisting of a pair of plate material which is fitted to each other coupled to both sides of the support. According to claim 1, wherein the blocking plate 50 is formed extending from the first blocking portion 51 and the first blocking portion 51 is inserted into the earth plate insertion groove 11 in the support column and the support (10) And earthquake tents by CIP, characterized in that the second blocking portion 52 to block between the inner circumferential surface of the holding steel pipe (1). delete delete delete Drilling a hole in the ground having a layered structure of soil layer and rock layer; A second step of inserting the holding steel pipe at equal intervals into the hole formed by the first step; A third step of coupling the blocking plate blocking the earth plate insertion groove to a support formed with the earth plate insertion grooves at both sides, and inserting the support into the steel pipe inserted by the second step to install the rock plate; A fourth step of inserting the reinforcing steel pipe to the soil layer between the holding steel pipes inserted by the second step; A plurality of longitudinal bars arranged at equal intervals along the circumferential direction, the center retaining ring is spaced at regular intervals along the longitudinal direction to the longitudinal reinforcing bars to fix the longitudinal bars and the circumference is supported on the inner circumferential surface of the steel pipe for the reinforcing steel Inserting the reinforcing steel bars formed in the center of the inside of the steel pipes inserted by the fourth step; A sixth step of injecting a filler into the pillar steel pipe inserted in the third stage so that the filler is filled only in the blocking plate of the pillar; A seventh step of injecting a filler into the reinforcing steel pipe inserted by the fifth step so that the filler is filled only to the soil layer; An eighth step of drawing the holding steel pipe and the reinforcing steel pipe in the ground; And inserting both sides of the earth plate into the earth plate insertion grooves of the posts, and stacking the earth plate in multiple stages.

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