KR100722198B1 - Strut system of temporary retaining wall and subgrade external wall construction method utilizing the same - Google Patents

Abstract

The present invention provides an opening in the buried slab which is buried in the basement outer wall while contacting with the basement wall when the basement wall is constructed with the basement outer wall and the joining wall in the supporting structure of the basement wall in which the interlayer slab of the building basement is supported by the basement wall. The present invention relates to a reverse support structure of a retaining wall that enables the construction of a basement wall to be continuously carried out by constructing it, and a method of continuous construction of a building basement joint wall which suppresses the occurrence of a reverse joint of the basement outer wall and strengthens the integrity by applying the same.

The reverse support structure of the retaining wall for the continuous construction of the underground plywood of the present invention is the retaining wall; A beam constructed toward the retaining wall; And, reinforced concrete slab which is constructed to be in close contact with the retaining wall above the beam and is constructed to directly support the retaining wall.

The reinforcement concrete slab is divided into a buried slab buried in the basement outer wall and an exposed slab exposed outside the basement outer wall while the cladding wall is constructed of a basement outer wall and a cladding wall. After installing the embedding die plate including the vertical plate portion vertically installed more than the exposed slab thickness along the opening of the bottom plate portion, the concrete is poured over the exposed slab thickness to form an opening at the boundary of the vertical plate portion, integral construction with the exposed slab The embedding die plate is characterized in that it is formed to a size that can be penetrated through the vertical reinforcement of the outer layer of the outer wall to be arranged in two layers so that the opening facing each other.

Retaining wall, plywood, inverted joint, earth pressure, continuous

Description

Inverted support structure of retaining wall for continuous construction of underground plywood and continuous construction method of underground plywood using the same {Strut system of temporary retaining wall and subgrade external wall construction method utilizing the same}

1 and 2 are a plan view (a) and a cross-sectional view (b) to (d) according to a construction sequence showing a reverse support structure of a conventional underground retaining wall.

Figure 3 is a plan view (a) and a cross-sectional view (b) to (e) according to the construction sequence showing an embodiment of the reverse support structure of the retaining wall for the continuous construction of the underground plywood according to the present invention.

Figure 4 is a cross-sectional view showing various embodiments of the construction form of the embedded slab in the reverse support structure of the retaining wall for the continuous construction of the underground plywood according to the present invention.

Figure 5 is a view showing various embodiments of the formwork forming plate applied to the present invention.

<Description of Major Symbols in Drawing>

10: retaining wall 11: filling material

15: fixing member 15a: supporting member

15b: fixing member

20: see 25: pedestal

30: reinforced concrete slab 30a: embedded slab

30b: exposed slab 35: slab rebar

40: embedded die plate 41a: vertical plate portion

41b: bottom plate portion 43: opening portion

45: water chin

50: outer wall

S: Sleeve B: Dowel Bar

J: Inverted Joint

The present invention relates to a reverse support structure of a retaining wall for continuous construction of underground plywood and a continuous construction method of a building underground plywood applying the same, and more specifically, an underground mudstone wall in which an interlayer slab of a building basement supports a retaining wall. In the supporting structure of the wall, when the wall is constructed with the basement wall and the cladding wall, the supporting slab buried in the basement wall is constructed so that the opening is formed so that the construction of the basement wall can be continued. The present invention relates to a method of continuous construction of an underground plywood in a building that has suppressed the occurrence of inverse joints and strengthens its integrity by applying the structure and its application.

In general, the underground structure is constructed by constructing the main wall wall such as H-Beam + earth plate, CIP (Cast in-Place Pile), SCW (Soil Cement Wall), and then excavating the inside of the wall to build the structure. Excavation process involves bracing work to support external force such as earth pressure delivered through wall. Generally, temporary wall struts, ground anchors, or permanent structures are used for the construction of the retaining walls. Among these, adjacent structures in the city center use the permanent structures to secure structural stability, shorten the air, and generate civil complaints. It is the most advantageous when considering aspects, such as possession inhibition.

The support method using the permanent structure is composed of the reverse support method in combination with the reverse punching method.In this reverse support method, the beams and slabs, which are horizontal interlayer structures in the basement of the building, are constructed and pre-installed to serve as the permanent structures supporting the wall The remaining upper and lower cladding parts between the rim beams or slabs, which are horizontal interlayers, will be constructed later. That is, the interlayer structure is first constructed to directly support the retaining wall in the form of slab or rim beam, and then excavated. Generally, this process is repeatedly performed to the lowermost basement, and then the basement outer wall is built integrally with the retaining wall. It will be constructed with plywood.

1 and 2 is a view showing an example of the conventional underground retaining support method, Figure 1 is a state in which the slab supports the retaining wall, Figure 2 is a rim beam for the structural safety reinforcement of Figure 1 For example, the rim beam supports the retaining wall.

Conventional underground plywood structure as shown in Figures 1 and 2 to extend the slab or rim beam to the outer portion of the outer wall to be directly fixed to the earth wall to support the external force, such as earth pressure, and to post-install the slab or It is made by embedding the rim beam on the basement outer wall. At this time, for the post-construction of the basement outer wall, the installation of concrete sleeve (S) must be installed on the slab or the rim beam to be pre-installed, and furthermore, to integrate the basement outer wall of the upper and lower layers due to the difficulty of continuous reinforcement of the interlayer main reinforcing bars. Installation of a separate dowel bar (B) is required (see FIGS. 1B and 2B).

However, concrete pouring through sleeves is difficult to construct and makes it difficult for concrete to be filled tightly, resulting in inverted joints (interlayer gaps in the outer wall of the basement, J) on the slab or rim beams (FIG. 1C and 2c), the reverse oscillation joint (J) acts as a cause of deterioration of the structural performance of the building to further develop after the concrete shrinkage (see FIGS. 1d and 2d). That is, the inflow of groundwater is made through the inverted joint. The inflow of groundwater causes corrosion of reinforcing steel and deterioration of concrete, resulting in deterioration of durability of the structure.

The present invention has been made to improve the above-mentioned conventional problems, in the support structure of the basement wall to be constructed so that the interlayer slab of the building base to support the wall, when the wall is constructed as a basement wall and a cladding wall contact with the wall The purpose of the present invention is to provide a back support structure for the basement wall, which allows the construction of the basement wall to proceed easily by constructing the buried slab embedded in the basement wall.

Another object of the present invention is to construct the buried slab buried in the basement outer wall while supporting the basement wall to form an opening so that the concrete can be continuously placed between floors while continuously reinforcing the vertical bars of the basement wall without installing a sleeve or dowel bar. Therefore, it is possible to provide a continuous construction method of the basement plywood of the building which suppresses the occurrence of reverse joint and strengthens the integrity.

Another object of the present invention is to provide a continuous construction method of the building basement plywood to improve the waterproofing performance by providing a configuration that serves as a water cutting jaw to block the groundwater flowing through the retaining wall.

The present invention to achieve the above object is the earth wall; A beam constructed toward the retaining wall; And, reinforced concrete slab which is constructed to be in close contact with the retaining wall above the beam and is constructed to directly support the retaining wall.

The reinforcement concrete slab is divided into a buried slab whose end contacting with the mud wall is buried in the basement outer wall and an exposed slab exposed outside the basement outer wall, and the buried slab is formed of an opening plate. And a buried formwork plate including a vertical plate portion vertically installed above the exposed slab thickness along the opening of the bottom plate portion, and then placing concrete above the exposed slab thickness to form an opening at the boundary of the vertical plate portion and integrally with the exposed slab. It is constructed, the buried formwork supporting the back wall of the earth wall for the continuous construction of the underground plywood, characterized in that formed by the size of being able to penetrate through the vertical reinforcement of the basement outer wall to be double-folded so that the opening facing each other Provide structure.

In addition, the present invention comprises the steps of: (a) constructing the wall and installing the inner pillar; (b) digging to a predetermined depth; (c) constructing the interlayer horizontal structure of the beam and reinforced concrete slab as the horizontal support of the retaining wall while applying the reverse support structure of the retaining wall; (d) repeating steps (b) and (c) to complete the earth wall support frame by the interlayer horizontal structure up to the basement floor of the building; And, (e) placing the concrete through the opening of the embedded slab after placing the vertical reinforcing bar through the opening of the embedded slab, embedding one end of the beam and the embedded slab of the reinforced concrete slab in the interlayer horizontal structure, It provides a continuous construction method of the building underground plywood, characterized in that it comprises a;

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

In the present invention, when the interlayer slab of the building basement is constructed to support the earth wall, the earth wall is in contact with the earth wall when the earth wall 10 is constructed as a base wall with the base outer wall 50. As the embedded slab 30a embedded in the outer wall 50 is constructed so that the opening 43 is formed, the interlayer continuous reinforcement of vertical reinforcement and the interlayer continuous casting of concrete are possible in the construction of the basement outer wall 40, thereby providing integrity Its technical features are achieved with reinforced underground plywood. According to this technical feature, the present invention proposes a supporting structure of an underground mud wall and a continuous construction method of a building basement plywood applying the same.

1.Reverse support structure of basement wall

3 is a view showing a reverse support structure of the basement wall in accordance with the present invention. In the underground reverse drilling method, the supporting structure of the underground retaining wall is the retaining wall (10); A beam 20 constructed toward the retaining wall 10; And a reinforced concrete slab 30 which is constructed to be in close contact with the retaining wall 10 above the beam 20 and is constructed to directly support the retaining wall 10. Concrete slab 30 serves as an interlayer horizontal structure supporting the retaining wall (10). The present invention is the construction form of the reinforced concrete slab (30) to continuously install the basement outer wall (50) between floors when constructing the basement wall (10) and the basement outer wall (50) as an underground plywood in such a basement wall support structure Is changing. In other words, the reinforced concrete slab 30 has a structure that sufficiently guides the interlayer continuous reinforcement of the vertical reinforcement of the basement outer wall 50 and the interlayer continuous casting of the concrete while sufficiently supporting the retaining wall 10.

Specifically, in the present invention, while the reinforced concrete slab 30 is in contact with the earth wall 10, the embedded slab (30a) is embedded in the basement outer wall 50; and the exposed slab (30b) exposed outside the basement outer wall (50); After installing the embedded slab (30a) to the embedded die plate 40, the concrete is poured over the exposed slab (30b) thickness or more to maintain the opening 43 as it is integrally constructed with the exposed slab (30b) Doing. However, the embedded die plate 40 for the construction of the embedded slab 30a includes a bottom plate portion 41b having an opening 43 formed therein; and vertically above the exposed slab 30b thickness along the opening 43 of the bottom plate portion. It is configured to include a vertical plate portion (41a), and the opening 43 is to be adopted to be formed to a size that can be penetrated through the vertical reinforcement of the basement outer wall 50, which is double reinforcement facing each other at the same time have. Thus, in the present invention, the reinforced concrete slab 30 supports the retaining wall 10 in a state in which the embedded slab 30a and the exposed slab 30b are integrated until the stage before the construction of the basement outer wall 50, After construction of the basement outer wall 50, the embedded slab 30a of the reinforced concrete slab is embedded in the basement outer wall 50 so that only the exposed slab 30b serves as an interlayer structure of the completed building. The opening 43 of the embedding die plate remains in the opening state as the boundary of the vertical plate portion 41a even after the embedding slab 30a is completed, which is the interlayer continuous reinforcement of the vertical reinforcement of the basement outer wall 50 and the concrete. It is used as a space for continuous casting between floors.

4 shows various embodiments of the construction form of the embedded slab 30a in the reverse support structure of the retaining wall for the continuous construction of the underground plywood according to the present invention. The embedded slab 30a may be constructed with the same thickness as the exposed slab 30b, as shown in FIG. 3 (b), but the portion where the embedded slab 30a is in direct contact with the retaining wall 10 receives the most horizontal force. Considering that it is desirable to be made of a reinforcing structure compared to the exposed slab (30b). Thus, in the present invention, as shown in FIG. 4 (a), the entire embedded slab 30a is formed thicker than the exposed slab 30b, or as shown in FIG. 4 (c), the wall of the embedded slab 30a ( 10) It is proposed to form the end of the most direct contact with the cross section below. In the case of Figure 4 (a) it can be easily implemented by adopting that the height of the vertical plate (41a) is made larger than the exposed slab (30b) thickness by the embedded die plate (40). In particular, if the upper end of the buried slab 30a is formed to extend in cross section below, as shown in FIG. 4 (c), the extended best end may also serve as a water cutting jaw, contributing to improved waterproof performance. On the other hand, Figure 4 (b) is a form constructed by applying the embedded slab plate provided with a water cutting jaw directly to improve the waterproof performance.

FIG. 5 is a view illustrating various embodiments of the embedding die plate 40 applied to the construction of the embedded slab 30a in the present invention. The embedding die plate 40 has a bottom plate portion 41b having an opening 43 formed therein. ) And a vertical plate portion 41a vertically placed along the opening. The bottom plate portion 41b and the vertical plate portion 41a serve as formwork surfaces for concrete placing of the embedded slab 30a, and in particular, the vertical plate portion 41a also serves as a reinforcing material supporting the horizontal force. In view of such a role, the purchase die 40 is appropriate to be manufactured by adopting a material having a certain structural strength such as steel sheet, thin precast concrete, and wire mesh, and it is also possible to manufacture two or more materials in combination. Do. However, when the embedded die plate 40 is made of a metal material such as steel sheet or wire mesh, the bottom plate portion 41b is waterproofed to reduce the strength of the embedded slab 30a through corrosion inhibition of the embedded die plate 40. It is desirable to prevent. On the other hand, the opening 43 formed in the bottom plate portion 41b of the embedding die plate may be any shape, such as square, triangular, cylindrical, but if the area is minimized, the structural strength of the embedded slab 30a will be maximized. As shown in FIG. 5, a butterfly opening which gradually narrows in width and then widens again is preferable.

The embedding formwork plate 40 of FIG. 5 is all manufactured as a unit unit, and they are continuously installed. 5 (a) to 5 (c) show the buried formwork plate 40 in the form of one opening 43, Figures 5 (d) and 5 (e) is three openings 43 5 shows a formwork plate 40 having a form formed therein, and FIG. 5 (f) shows the formwork plate 40 having an intermittent embossing formed on the surface to strengthen the unity with concrete. FIG. 5 (g) shows the embedding die plate 40 in which the bottom plate portion 41b is made of wire mesh, and FIG. 5 (h) shows a separate opening as the bottom plate portion 41b is made of wire mesh. 5 shows a buried formwork plate 40 having no shape (the gap between the wire mesh can be utilized as an opening in the case where only the bottom plate portion and the vertical plate portion are provided without forming an opening portion), and FIG. 5 (i) shows the bottom plate portion. (41b) shows the buried formwork plate 40 protruded water projection jaw 45 formed on the lower surface. Although not specifically illustrated, the embedding die plate 40 may be manufactured so that continuous irregularities are formed, such as a conventional deck plate, to enhance the integrity of the concrete and serve as a water cutting jaw. In particular, when the embedded die plate 40 is made of steel sheet when the exposed slab 30b of the reinforced concrete slab is constructed as a deck plate, the deck plate of the exposed slab 30b and the bottom plate portion 41b of the embedded die plate When the integrated slab plate 40 and the exposed slab 30b of the exposed slab (30b) installation process will be integrated into one, as a result of the integration of the embedded slab (30a) and the exposed slab (30b) Will be strengthened.

2. Construction method of building underground plywood

3 shows a construction sequence of applying the reverse support structure of the basement wall to complete the basement wall, referring to the construction method of the building basement wall of the present invention.

(a) construction and installation of internal pillars

First, construct the retaining wall 10 on the boundary line where the building is installed, and install the column at the position of the inner pillar. The soil wall 10 may be any case that is constructed in a heat-heating manner, such as H-Beam + earth plate, CIP (Cast in-Place Pile), SCW (Soil Cement Wall), and FIG. 3 is a soil wall (CIP 10). ).

(b) excavation

Excavate to a predetermined depth. At this time, the excavation proceeds to the extent that the retaining wall 10 exposed to the outside can support the earth pressure sufficiently.

(c) Construction of interlevel horizontal structures

The interlayer horizontal structure of the beam 20 and the reinforced concrete slab 30 is constructed as a horizontal support of the retaining wall 10 while applying the reverse support structure of the above-mentioned underground retaining wall. Beam 20 is constructed so as to face the retaining wall 10, and may be in any form, such as steel, SRC, RC, PC, composite structure, Figure 3 shows a steel cheolgolbo not settled in the retaining wall (10) Doing. If the reinforced concrete slab 30 is constructed so that the embedded slab 30a and the exposed slab 30b are distinguished, the embedded slab 30a is constructed by applying the embedded formwork plate 40, and includes a reinforced concrete structure. 3 shows the reinforced concrete slab 30 in which the slab reinforcing bar 35 is disposed on-site while the deck plate is used to construct the exposed slab 30b.

In particular, when using the deck plate in the construction of the exposed slab 30b of the reinforced concrete slab 30 as shown in Figure 3 to connect the beam 20 adjacent to the end of the beam 20 in order to stably mount the deck plate Mounting beam 25 may be further installed, the mounting beam 25 is installed in the same position as the inner line of the basement outer wall 50 to avoid interference with the main reinforcing bar 55 of the basement outer wall. Furthermore, the deck plate of the exposed slab 30b and the purchase formwork plate of the embedded slab 40 are integrally manufactured for easy construction of the reinforced concrete slab 30 divided into the embedded slab 30a and the exposed slab 30b. May be adopted.

(d) completion of supporting wall

Repeating the excavation step and the step (c) of the interlayer horizontal structure construction step of step (b) to complete the supporting wall 10 by the interlayer horizontal structure to the lowermost floor of the building.

(e) construction of plywood

When the retaining wall 10 supporting frame is completed, the basement outer wall 50 in contact with the retaining wall 10 is constructed. The construction of the basement outer wall 50 is to reinforce the vertical rebar to pass through the opening of the buried slab (30a), and then cast concrete through the opening of the buried slab (30a) to the end of the beam 20 of the interlayer horizontal structure It is made of a method of embedding the embedded slab (30a) of the concrete slab. Since the opening of the embedded slab 30a is sufficiently secured in the construction of the interlayer horizontal structure, the interlayer continuous reinforcement of the vertical reinforcement of the basement outer wall and the interlayer continuous casting of the concrete are possible through the opening. Thus, the basement outer wall 50 is constructed as a single underground plywood in contact with the retaining wall while strengthening the interlayer integrity.

The construction of the plywood wall may also be performed for the purpose of shortening the air and increasing work efficiency even in the completion of the retaining wall support frame in step (d). In other words, even if it is not the lowest floor of the building, when the construction of some inter-level horizontal structures is completed, the reference floor is set, and concrete is then sequentially poured on the basis of the inter-layer horizontal structure of the reference floor to construct the basement outer wall 50 integrally with the earth wall 10. The middle wall construction step is to proceed and the middle wall construction step is to be carried out simultaneously with the excavation and construction of the inter-layer horizontal structure of the reference layer or less.

According to the present invention as described above, in the support structure of the basement wall, in which the interlayer slab of the building basement is constructed to support the wall, when the wall is constructed as the base wall and the cladding wall, it is embedded in the base wall while being buried in contact with the wall By constructing the slab using the embedded slab plate in which the opening is formed, the construction of the basement outer wall can be continuously carried out between layers by maintaining the opening as it is. As a result, it is possible to easily vertically reinforce the vertical reinforcement of the basement outer wall without installing a sleeve or a dowel bar, and also to continuously cast concrete without distinction between layers, thereby strengthening the integrity while suppressing the occurrence of reverse joints. Can be completed with plywood.

Furthermore, the present invention can be completed by using an embedded form plate provided with a water cutting jaw in the construction of the embedded slab or by expanding the cross section below the top end of the embedded slab to serve as a water breaking jaw to improve the waterproofing basement plywood. do.

Claims (8)

Earthen wall; A beam constructed toward the retaining wall; And, reinforced concrete slab which is constructed to be in close contact with the retaining wall above the beam and is constructed to directly support the retaining wall. The reinforcement concrete slab is divided into a buried slab which is buried in the basement outer wall and an exposed slab exposed outside the basement outer wall while the retaining wall is constructed of the basement outer wall and the joining wall. The buried slab is provided with a bottom plate portion having an opening formed therein and a buried formwork plate including a vertical plate portion vertically installed above the exposed slab thickness along the opening of the bottom plate portion, and then placing concrete above the exposed slab thickness to limit the vertical plate portion. It is constructed integrally with the exposed slab while forming the furnace opening, The buried formwork plate is a support structure for the earth wall for continuous construction of the underground plywood, characterized in that formed in the size to be able to penetrate through the vertical reinforcement of the basement outer wall to be reinforced in two layers to face the opening. In claim 1, The buried formwork of the embedded slab is made of any one of steel sheet, thin precast concrete or wire mesh or composited with two or more materials. In claim 2, When the embedded die of the embedded slab is made of steel sheet, when the exposed slab of the reinforced concrete slab is constructed as a deck plate, the deck plate of the exposed slab and the bottom plate of the embedded die of the embedded slab are integrally manufactured. Inverted support structure of retaining wall for continuous construction of underground plywood. In claim 2, In the case where the bottom plate of the embedded die of the embedded slab is made of wire mesh, the wire mesh is disposed in the opening of the bottom plate, and the embedded slab is constructed such that the opening is formed at the boundary of the vertical plate. Reverse support structure of the retaining wall for construction. The method according to any one of claims 1 to 4, Recess support structure of the retaining wall for the continuous construction of the underground plywood, characterized in that the buried formwork of the embedded slab is formed intermittent embossing or continuous irregularities on the surface. The method according to any one of claims 1 to 4, Recess support structure of the retaining wall for the continuous construction of the underground plywood, characterized in that the buried formwork plate of the buried slab is made to protrude water breaking jaw on the bottom surface of the bottom slab. The method according to any one of claims 1 to 4, Reverse support structure of the earth wall for the continuous construction of the underground plywood, characterized in that the top end of the reinforced slab of the slab embedded slab directly in contact with the earth wall is extended in the form of a cross section downward. (a) constructing a retaining wall and installing an internal pillar; (b) digging to a predetermined depth; (c) constructing an interlayer horizontal structure of the beam and reinforced concrete slab as a horizontal support of the retaining wall while applying the reverse support structure of the retaining wall of any one of claims 1 to 4; (d) repeating steps (b) and (c) to complete the earth wall support frame by the interlayer horizontal structure up to the basement floor of the building; And, (e) Reinforce the vertical rebar to pass through the opening of the buried slab, and then cast concrete through the opening of the buried slab to embed the one end of the beam and the buried slab of the reinforced concrete slab in the interlayer horizontal structure, Constructing abutting underground plywood; Continuous construction method of building basement plywood, characterized in that comprises a.

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