KR100593203B1 - a deck supportframe and a construction methed - Google Patents

Abstract

The construction method of the underground structure using the deck support frame for forming the side pressure support and the deck support frame for forming the side pressure support according to the present invention (SBD (Strut Bracket Diaphragm) method) to fix the support projections on the support wall of the mud wall, the product Deck fixing part in which a plurality of concrete casting holes are formed in the middle and the end of the deck is arranged is installed on the support protrusion to form a deck support frame for forming the side pressure support on the end, so that other work spaces can be easily secured. In addition, the deck can be easily fixed and the connecting rebar with the side pressure support can be easily installed, so the construction is easy and the quality can be secured, and the vertical wall and the side pressure support are formed from the top to the bottom. Compared with the existing method of construction, construction is much simpler, smoother row of lines, vertical walls and sides When wiring the reinforcing bars forming the support beams, the free passage passes through the inside of the concrete placing hole of the side pressure support forming deck support frame to facilitate the wiring work of the reinforcing bar, ensuring the continuity of the reinforcement and concrete When the concrete is placed in the upper layer through the concrete placing hole of the deck support frame for the side pressure support formation installed on the concrete slab layer, it is possible to secure important building quality conditions. Compared to pour using pour ball, it is much easier and perfect filling of concrete is possible, so it is very easy to form side pressure support and vertical wall, and it is possible to secure excellent quality, and the installation structure of concrete slab layer is remarkably simplified. Changed and construction is performed quickly, It becomes possible side pressure support beam and the vertical wall and the installation is the overall simplicity and ease of use history of the deck is significantly reduced and the construction costs at low cost to have a superior effect that it is possible to reduce the air dramatically.

Description

       Construction method of underground structure using deck support frame for side pressure support formation and the deck support frame for side pressure support formation {a deck supportframe and a construction methed}

1 is a process chart showing the construction method of the underground structure using the deck support frame for forming the side pressure support according to an embodiment of the present invention

Figure 2 is a perspective view of the deck support frame for forming the side pressure support according to an embodiment of the present invention

Figures 3a, 3b, 3c, 3d, 3e, 3f is a schematic construction cross-sectional view of the underground structure constructed by the method according to the present invention

Figure 4 is a partially enlarged construction partial cross-sectional view schematically showing the installation state of the deck support frame of the construction site constructed by the method according to the invention

5 is a schematic plan view showing a state in which a side support support forming deck support frame is disposed at the time of construction of the side support support forming deck support frame according to an embodiment of the present invention;

Figure 6a, 6b, 6c is a schematic partial cross-sectional view showing the step of forming the vertical wall and the side pressure support using the deck support frame for forming the side pressure support of the present invention.

Explanation of symbols on the main parts of the drawings

3. Concrete pouring 4. Frame body

5. Deck High Government 6. Reinforcement

7. Concrete column 8. Support beam

9. Support protrusion 10. Column support beam

The present invention relates to a construction method of the underground structure using the deck support frame for forming the side pressure support and the deck support frame for forming the side pressure support, and more specifically, when used in the construction of the basement of the building in the city or building dense area, etc. Among the construction methods of underground structures, the Strut as Permanent System (hereinafter referred to as the “SP” method) supports the decks for building the slabs of each floor of the building, and the construction of the basement floors, for example, side pressure support and side walls. Using the deck support frame for side pressure support formation and the side support frame for side pressure support formation to reduce the construction cost and shorten the construction period by facilitating the construction of reinforcement wiring, formwork and concrete casting It relates to the construction method of underground structures.

In general, if you want to build a high-rise building, dig a temporary construction using a strut method using a strut method using earth-anchor method or H beam as a temporary material to lay the foundation of the building. The basement of the basement at the bottom of the basement and ascends in order to build the building and dismantling the provisional facilities is a common existing construction method, but in the construction work in the city where the adjacent buildings have to be destroyed without affecting the adjacent buildings. -The anchor construction method cannot be used, and this existing temporary construction strut construction method does not have the risk of dismantling the temporary installation in the construction stage of underground structure and the difficulty of construction due to mutual interference with the structure, material loss, installation and dismantling of temporary construction materials. Has unreasonable reasons such as the need for a lot of manpower and materials and a long air during the dismantling work. In high-density urban areas and in high-density building areas, the building materials needed for construction are stacked and construction spaces are narrow and there are disputes caused by dust or noise. After installing the earthen wall, install the main column (steel column) in the exact vertical direction by using a small diameter (diameter 600 ~ 800mm) perforator before excavating and install concrete at the base of the column to have a predetermined support force. After forming the bulbs, the structure (beam) is installed and used on a floor-by-floor basis to support the earth pressure and complete the excavation to the target depth.After the foundation of the building, the ground and the basement frame work is completed to complete the underground structure. Later, the SPSP method, which uses this as a structure and is permanently supported by earth pressure and vertical load, is widely used. However, in the SP method, the underground construction is carried out from top to bottom, and the side pressure support of each floor and the concrete slab layer are constructed on the ground in an unstable state. There is a high risk of damage to the beam, and a number of through-holes (concrete placing holes) through which the rebar is routed through or the concrete is laid down for reinforcement wiring and concrete placement to be performed after the construction of the side pressure support. There is a problem that a problem occurs in the strength bearing strength of the side pressure support because it is constructed in the formed state, in particular, it takes a long time so that the construction of the side pressure support of each layer takes about 30% of the entire process There is a problem that the construction cost is the biggest cause of the high price. In detail the construction sequence, after installing the earthen wall, excavate the earth and sand with the etch beam which is the pillar of this building on the ground, install the side pressure support beam first, and install the steel frame girders and steel frame beams on the ground floor level. After installing the first floor slab and installing concrete, dig the ground of the first floor, install the side pressure support first, install the steel girder and the steel golbo, which is the structure of the first floor, install the deck and install the concrete Form the first-floor slab layer, dig the foundation of the lower basement layer, install the side pressure support first, install the deck first, and install the concrete to form the second basement slab layer. After the installation of concrete and placing concrete, the foundation of the building on the lowest floor is excavated to the desired floor. In order to support the vertical and horizontal loads of the substructure and to form the building, the column, beam (SRC beam: steel reinforcement beam), vertical wall (including the protective wall on the side of the building), and side pressure support beam (slab edge) of each floor Reinforcement wiring and formwork to form the connection between the beams, and cast concrete from the top to form columns, beams, walls and side pressure support beams. The work is performed from the bottom up in the manner of connecting the beams, the wall and the side pressure support to form the connection of the columns, beams, walls and the pressure support of the first basement. However, in the conventional SP method, in order to install beams and slab decks, which are structures of the main building to support lateral pressure during underground excavation, side beams are first installed at the edges of slabs in each layer to connect beams connected with columns to support beams. Because of the mounting method, there are many difficulties in construction such as reinforcing bar connections and formwork in the pit soil from the top to the bottom without the lower support layer, and it is difficult to work in the future when reinforcing bar connections such as sidewalls and concrete placing, It is difficult to secure the stability of the process and the quality of the building because it is used to cut or install slabs or decks that have been used or already installed, and it causes excessive workforce, construction cost, and air delay. In this SPS method, the temporary wall is used as the exterior wall of the building, so the side pressure support is first introduced into the side wall in the CIP method, the D / W method or the slurry diaphragm wall method. Reinforcement of slab concrete is installed by connecting deck with steel structure beams, and there is no part that goes up and down on the side pressure support beam. In order to connect the wires and place the concrete, the rebar joints to be connected must be unplugged or installed in order to install the lateral pressure support during installation (from below, to the columns, beams and walls). The work becomes cumbersome, such as the need to form concrete pour holes for concrete pouring, and the wiring and formwork of the rebar It is also not easy to form, so it is very slow to form the side pressure support and slab on each floor.In the case of sequential construction (column, beam, wall installation work from the bottom up), concrete is laid using reinforcement wiring and formwork after installation. It could not be sufficiently filled into the formwork, so it is difficult to express sufficient strength of the building, so it is difficult to ensure the quality, and the problem is that the air is delayed due to the difficulty of work, and a large number of manpower is required and construction cost is excessively generated.

The object of the present invention is to solve this problem, and to effectively support the earth pressure during construction, which is the purpose of the earthquake in the building permanent structure, the slab formation is very easy, the construction of the side pressure support is replaced by the earthwork struts Since the construction can be performed sequentially rather than from the top to the bottom of the structure (bottom, beam, wall installation work from top to bottom), the installation structure of the side pressure support beam and the concrete slab is changed drastically and the vertical protective wall and side pressure Since the reinforcing wire of the support beam is easy and the concrete placing work can be performed without the installation of the upper concrete placing hole or the cutting work of the pre-installed slab layer, it is performed quickly, greatly reducing the air and improving the stability and quality of construction. At the same time, the installation of the deck for slab formation and the side support of the slab rebar Construction method of underground structure using deck support frame for side pressure support formation and deck support frame for side pressure support formation, which makes it possible to easily connect work, which greatly reduces the manpower and makes construction cost low (SBD method: Strut of Bracket Diaphragm).

This object of the present invention is a plurality of pillar beams in the portion to be a pillar of the building in the concrete colonna is installed a plurality of concrete columns installed in succession and the support beam for the earth retaining to prevent the collapse of the soil around the building construction SBD method according to the present invention comprising the step of forming a concrete slab layer of each layer in order from the top to the bottom in the cast state, and the load-bearing wall forming step of constructing the side pressure support and the vertical wall from the bottom up ( In the construction method of SBD of the underground structure using the SBD (Strut of Bracket Diaphragm) method, hereinafter referred to as the "SBD method",

Forming a concrete slab layer of each layer while going down from the top to the bottom is to excavate the basement layer to a certain depth,

Attaching and fixing a support protrusion on the support beam of the retaining wall installed in the concrete column;

Arranging a deck support frame for forming a side pressure support on which a concrete casting hole is formed and a deck fixing part is formed on a support protrusion fixed on the concrete column;

And placing a deck on a deck fixing part on the side support plate forming deck support frame disposed on the support protrusion, and placing concrete on a horizontally arranged deck to form a concrete slab layer.

Steps to build up the bearing wall for constructing the pillars, beams, vertical walls and side pressure support of each floor while going up from the bottom                         

Reinforcing bar wiring step of reinforcing the reinforcing bar to form a vertical wall and side pressure support in the concrete slab layer passing through the concrete placing hole of the deck support frame for forming the side pressure support;

Forming a formwork to form the vertical wall and the side pressure support;

It is achieved by the construction method of the underground structure using the side support support forming deck support frame according to the present invention comprising the step of placing concrete through the concrete casting hole of the side support support forming deck support frame.

This object of the present invention is a frame body fixed to the support protrusion on the retaining wall support beam and formed with a plurality of concrete casting holes in the middle, and a deck fixing part attached to one end of the frame body and the end of the deck is formed It is achieved by the deck support frame for forming the side pressure support.

The construction method of the underground structure using the deck support frame and the side pressure support forming deck support frame according to the present invention according to the embodiment described in detail below with reference to the accompanying drawings Features and advantages will be more clearly understood.

In the construction method of the underground structure using the deck support frame for forming the side pressure support according to the present invention, as shown in Figure 1, the support beam of the earthen wall is built in order to prevent the collapse of the earth and sand around the building construction Steps to form a concrete slab layer of each layer in turn while descending from top to bottom with a plurality of pillars H beam is installed in the portion to be the pillar of the building in the concrete colonnaces installed in succession (1 In the SBD method, which is a construction method of the underground structure, which is composed of a load-bearing wall forming step (2) of constructing pillars and side pressure support and vertical walls of each floor while rising from below,

Step (1) of forming a concrete slab layer of each layer while going down from the top to the bottom (11) to excavate the basement layer to a predetermined depth,

Attaching and fixing a support protrusion on the support beam installed in the concrete column;

(13) arranging and fixing a deck support frame for forming a side pressure support on which a concrete casting hole is formed and a deck fixing part is formed on a support protrusion fixed on the concrete column;

Placing the deck on the deck fixing part of the deck support frame for forming the side pressure support beam and placing concrete on the deck to form a concrete slab layer (14),

Step (2) of the bearing wall forming the vertical wall and the column and the side pressure support of each floor while going up from the bottom

Reinforcing bar step 21 for reinforcing the reinforcing bar forming the vertical wall and the side pressure support in the concrete slab layer passing through the concrete placing hole of the deck support frame for forming the side pressure support,

Forming a formwork to form the vertical wall and the side pressure support (22),

Placing concrete in the upper layer through the concrete placing hole of the deck support frame for forming the side pressure support (23).

The support protrusion 9 is an H beam or a bracket is used.

Deck (D) disposed on the bottom surface of each layer of the underground structure is caught on one end of the deck fixing part (5) of the support frame (A) and the other end is caught on the cheolgolbo or steel frame girders installed on the bottom surface of the underground structure In addition, the deck in the center or the inner portion of the bottom surface, not the edge of the bottom surface is installed on the cheolgolbo or steel frame girders installed on the bottom surface, but such a cheolgolbo or steel frame girders are already known and detailed description thereof will be omitted.

      The deck support frame (A) for side pressure support and slab formation according to an embodiment of the present invention, as shown in Figure 2, the frame body 4 is formed with a plurality of concrete placing holes (3), and the frame The deck fixing part 5 which is attached to one end of the main body 4 and in which the end part of the deck D is arrange | positioned is formed. The lower part of the deck fixing part 5 is provided with a reinforcing rod 6 extending downward to prevent deformation such as bending (buckling) of the support frame A and the deck fixing part 5. The deck support frame (A) for forming the side pressure support beam is fixed to the support protrusion (9) fixed on the support beam (8) installed in the concrete column (7).

In the present embodiment, the frame main body 4 is formed in a steel quadrilateral pipe material and extends in a lateral direction of the main frame 41 so that the main frame 41 and the concrete pouring hole 3 are formed in the transverse direction. It consists of four subframes 42 fixed and spaced apart from each other. In this embodiment, one main frame 41 is installed, but two or more may be used to receive a greater lateral pressure, and four subframes 42 may be installed, but some increase or decrease may be possible. In addition, the subframe 42 is formed to be attached to the main frame 41 at a right angle, but may be formed to be inclined rather than a right angle.

A deck fixing part 5 is formed at one end of the subframe 42. The deck fixing part 5 is disposed at the end of the deck so that the end of the deck for supporting the lower layer of the concrete slab is fixed to one end of the sub-frame 42. In the present embodiment, the deck fixing part 5 is used as the N-shaped steel, but is not limited to this, of course, other steel may be used. The reinforcing rod 6 is fixed in a zigzag reinforcing bar and used a c-shaped steel at the bottom, but can be used in other forms, of course.

       The construction method of the underground structure using the deck support frame (A) for forming the side pressure support and the deck support frame for forming the side pressure support according to the present invention having such a structure will be described in detail below.

Construction method of the underground structure using the deck support frame for forming the side pressure support according to an embodiment of the present invention, as shown in Figures 3a, 3b, 3c, 3d, 3e, 3f, the earth and sand around the construction In order to prevent the collapse of the support beam (8) is built-in and a plurality of concrete columns 7 are installed in succession. A plurality of pillar H beams 10 are placed in the portion to be pillars of the building inwardly bounded by the concrete colonnades (7) and excavate a certain portion of the ground and onto the support beams 8 of the concrete colonnades 7. Attaching and fixing the support protrusions 9 to be horizontally spaced apart at regular intervals on the concrete in this way, the concrete placing hole (3) is formed on the support protrusions (9) fixed at regular intervals and the deck fixing part (5) The deck supporting frame A for forming the side pressure support beams is fixed to be oriented along the edge of the ground floor 1. Then, between the pillar H beam 10 and the concrete column 7 of the building and the pillar H beam ( 10) Connect the steel beams to form a ground-floor structure, place the deck (D) so that one end of the deck (D) is arranged on the deck fixing part (5), wire the slab reinforcement, then slab concrete Complete the ground floor floor workshop, then from above Excavation of the ground floor of the first floor under the excavation (shown in Figure 3a) and at the height of the ground of the first floor of the basement, the support projections are spaced horizontally at regular intervals on the support beam 8 of the concrete column 7 in the same manner as described above. (9) is fixed to the deck support frame (A) for forming a side pressure support beam formed with a concrete casting hole (3) and a deck fixing part (5) formed on the support protrusions (9) fixed at regular intervals. ) Is fixed along the edge of the first basement floor, and then the cheolgolbo is connected to the pillar H beam 10 and the concrete column 7 of the main building to form the first basement structure and the deck (D) Placing deck (D) so that one end is placed on deck fixing part (5), wiring slab reinforcement, and placing concrete on the floor, concrete slab layer of basement level 1 is formed (shown in Figure 3b). Sequentially repeating the 3rd basement floor (shown in Figure 3c), Formation of the concrete slab layer of the five underground layers (shown in Fig. 3d) is completed in sequence, and the work of forming the concrete slab layer of each layer is completed, that is, the formation of the concrete slab layer of each layer is detailed in FIG. As shown in FIG. 2, the support frame A on which the concrete placing hole 3 is formed and the deck fixing portion 5 is formed is installed on the support protrusion 9. It effectively transmits the lateral pressure of the soil to the beams and slabs, effectively supporting it as a temporary facility, making it easy to secure the space for reinforcing wires and concrete of the side support beams and vertical walls, and It is easy to fix the installation to facilitate the formation of the slab. When the work of forming the concrete slab layer of each basement layer is completed as shown in FIG. 3e, the reinforcing bars forming the vertical wall 11 and the side pressure support beam 12 upward from the concrete slab layer immediately above the bottom layer. (13) is wired so that the upper part of the reinforcing bar 13 passes through the concrete placing hole 3 of the deck support frame A for forming the side pressure bearing support (shown in FIGS. 6A, 6B, and 6C). In this way, the reinforcing bar 13 can pass freely through the concrete placing hole (3) is already formed so that the upper and lower through it is very easy wiring work of the reinforcing bar 13 is to be continuously installed rebar. As such, when the wiring of the reinforcing bar 13 is completed, the formwork 14 is formed to form the contour of the vertical wall 11 and the side pressure support 12, and the side pressure support formation deck installed in the upper concrete slab layer. When the concrete is poured from the upper layer through the concrete placing hole (3) of the support frame (A) is easy to finish the casting work of the vertical wall and the side pressure support (12). Repeatedly performing the operation of each floor from the bottom to complete the construction of the underground structure of the building (shown in Figure 3f).

As described above, the construction method of the underground structure using the deck support frame for forming the side pressure support and the deck support frame for forming the side pressure support according to the present invention is to fix the support protrusion using the H beam or the bracket on the support wall of the brick wall, and the product Deck fixing part in which a plurality of concrete casting holes are formed in the middle and the end of the deck is arranged is installed on the support protrusion to form a deck support frame for forming the side pressure support on the end, so that other work spaces can be easily secured. In addition, the deck can be easily fixed and the connecting rebar with the side pressure support can be easily installed, so the construction is easy and quality can be secured, and the vertical wall and the side pressure support can be formed from the top to the bottom. Compared with the existing method of construction below, construction is much simpler, and the lines of the construction are smooth. When wiring the reinforcing bar to form the direct wall and the side pressure support, the free wire passes through the inside of the concrete casting hole of the side pressure support forming deck support frame, so the wiring work of the reinforcing bar is very easy, It is possible to secure important building quality conditions, and also when concrete is poured from the upper layer through the concrete placing hole of the side support frame for deck pressure supporting frame installed in the concrete slab layer, It is much easier and perfect filling of concrete is possible compared to the use of embedded concrete placing hole, so it is very easy to form side pressure support and vertical wall and ensure the excellent quality, and the installation structure of concrete slab layer Significant changes have been made to quickly perform construction It is possible to greatly shorten and the installation of side supports, vertical walls and decks is totally simple and easy, which greatly reduces the manpower, makes construction costs cheaper, and significantly reduces the air. have.

Claims (4)

 In order to prevent the collapse of the earth and sand around the building, a support beam is installed and a plurality of concrete columns are installed in succession, and a plurality of pillar H beams are placed at the part to be a pillar of the building within the concrete column. Underground structure consisting of the step (1) to form a concrete slab layer of each layer in turn by going down to the bottom, and the load-bearing wall forming step (2) to construct a vertical wall and the pillar and side pressure support of each layer from the bottom up In the construction method of, Step (1) to form a concrete slab layer of each layer while going down from the top Excavating the basement layer to a constant depth (11), Attaching and fixing a support protrusion on the support beam installed in the concrete column; (13) disposing a deck support frame for forming a side pressure support formed with a concrete casting hole and a deck fixing part formed on a support protrusion fixed to the concrete column; And installing a deck on the deck support frame for forming the side pressure support beam and placing concrete on the deck to form a concrete slab layer (14). Steps (2) of the bearing wall forming the vertical pressure wall and the vertical wall of each layer while going up from the bottom Reinforcing bar step 21 for reinforcing the reinforcing bar forming the vertical wall and the side pressure support in the concrete slab layer passing through the concrete placing hole of the deck support frame for forming the side pressure support, Forming a formwork to form the vertical wall and the side pressure support (22), Construction method of the underground structure comprising the step (23) of placing concrete in the upper layer through the concrete placing hole of the deck support frame for forming the side pressure support. Frame body 4 is formed with a plurality of concrete pouring hole 3, and the deck fixing part 5 is attached to one end of the frame body 4, the end of the deck (D) is formed Deck support frame for forming lateral pressure support. According to claim 2, wherein the lower side of the deck fixing portion 5, the support frame (A) and the side fixing support, characterized in that the reinforcement (6) is installed to extend downward to prevent deformation of the deck fixing portion (5) Deck support frame. According to claim 2, wherein the frame body (4) is a main frame (41) extending in the transverse direction in parallel with the deck fixing portion (5), and the concrete pouring hole (3) is formed in the main frame (41) Deck support frame for forming a side pressure support, characterized in that consisting of a plurality of sub-frames 42 fixed to be spaced apart at regular intervals.

Images