KR20190074626A - Method for Alternate Basement Vertical Structure Construction Method in Top Down Construction Project - Google Patents

Abstract

The alternate construction method of the backfill method according to the present invention
The first step is to construct a ground pile and install a ground floor first floor,
A second step of constructing the underground one-story core part in order to support the ground-layer core part that is installed upward while constructing the underground slab as a lower layer;
A third step of constructing the underground vertical members alternately one by one and downwardly;
Constructing the lowest floor mat or foundation and then constructing the remaining remaining floor underground vertical members at the same time;
The construction period of the underground vertical member is shortened so that the subsequent ground frame and finishing work can be started early, thereby shortening the entire construction period.

Description

Technical Field [0001] The present invention relates to a method of constructing an underground vertical member structure for an alternate construction method,

The present invention is to shorten the construction period of the underground frame in the top down of the construction method. More specifically, the underground vertical member is alternately installed downwardly, and after that, At the same time, it provides a construction method for batch construction, so that the underground vertical member and the entire construction period can be shortened.

The top-down method is a method to reduce the construction period by constructing a foundation structure in the basement while constructing a ground-layer structure.

In general, the construction method of the basement method is to construct the bottom slab and the column, to construct the slab after each flooring, and finally to construct the bottom foundation or mat and to have a depth of 4 to 7 stories underground.

Underground vertical pillar columns are constructed at the beginning of the construction, one core layer underground is constructed for the ground floor construction and the remaining vertical members are installed from the base or mat to the top layer.

At this time, the construction of the ground layer frame is simultaneously applied with the underground layer, but the number of layers that go up before the foundation and mat construction and the number of layers that go up until the completion of the underground vertical member are structurally limited. For example, up to 8 slabs on the ground can be used up to foundation and matting. Only up to 15 slabs on the ground can be used until the underground vertical member is completed. .

Therefore, if the period of underground flooring construction is increased, the ground flooring frame should be constructed only after 8 or 15 floors. On the contrary, if the underground floor frame construction is accelerated, the construction of the ground floor frame is accelerated, and the entire construction period is greatly influenced by the underground construction.

Especially, the ground floor frame takes 6 ~ 7 days to construct one layer of the reference layer, so it requires 4 or more layers per month, but the underground layer takes 1.5 months or 2 months to construct, so the construction speed of the underground layer is relatively slow.

The problems in the conventional top-down method are as follows.

The conventional underground construction procedure is carried out with the retaining piles, the piles, the downward trenching and slab construction, the lowest foundation or mat construction, and the upward tilting of the underground vertical members.

Here, the underground vertical member has a characteristic that it proceeds from the base or the mat after the casting (the construction from the lower layer to the upper layer). The construction period of the underground vertical member takes 20 to 25 days for one floor construction and 4 to 5 months for 6 stories.

The underground vertical members are installed from the foundation or from the mat after pouring (from top to bottom). The underground vertical member is a critical path (critical path) that determines the construction period because the ground layer can continue to rise after the underground vertical member is completed.

On the other hand, the ground floor frame has 6 to 7 days per building cycle, and the construction speed is fast. However, the number of floors that can be raised to the basement mat loading time (for example, 8 floors above the ground) Construction stops and construction work will occur at the inflection point of 8 floors and 15 floors above ground.

During the period of construction of the underground vertical member, each floor construction should be smoothly carried out smoothly without fail. If one floor is delayed, the ground floor construction will be delayed. Therefore, the existing construction method which requires smooth construction of the underground vertical member continuously in a short time has a great risk of air delay.

The backfilling method has the advantage of shortening the construction period by constructing the ground layer while simultaneously constructing the basement layer. However, according to the structural constraints that the ground layer can not rise above a certain number of layers due to the speed of underground construction, air is greatly affected by underground frame construction.

Title of the Invention Parallel ground and underground structures using core inner lattice girder beam and ground layer core part applied firstly (Japanese Patent Application No. 1020110024619 filed on Mar. 17, 2011), Registered Number / date 1012420170000 (2013.03.05) Construction method, Patent Application No. 1995-0003110, filed on February 18, 1995, a method of constructing a concurrent construction of a ground structure and a basement frame of a building structure Application No. 10-2003-0037296, filed on Jun. 10, 2003, an architectural structure having a mixed structure of a reinforced concrete structure and a steel reinforced concrete structure, and a method of simultaneous construction thereof Application No. 10-2011-0087835, filed on August 31, 2011, registration number 10-1101182, registration date December 26, 2011, underground construction method of underground structure Application No. 10-2013-0004918, filed on Jan. 16, 2013, registration number 10-1426511, registration date July 29, 2014, a hypothetical frame system used in the construction of underground structures in a building,

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to shorten the period of construction of the underground vertical member in the backhoe method so that the ground floor frame construction can be continuously performed.

Thereby shortening the entire construction period.

In order to accomplish the above object and to solve the problems of the prior art described above, according to the present invention, there is provided a method for constructing an alternate underground vertical member, comprising the steps of alternately constructing the underground vertical members downwardly, And is dispersed and installed at the same time between the vertically installed parts.

According to the present invention, the following effects can be expected.

The construction period is shortened by eliminating a number of underground vertical members on the whole process table and eliminating them on the critical path that determines the construction period.

Because the underground vertical member is installed one by one, the buckling length of the column is shortened, so that more ground layers can be constructed and the entire construction period is shortened.

When the underground vertical members are installed one by one, it is possible to simultaneously construct the upwardly installed residuals, thereby shortening the entire construction period.

Because the underground vertical member can be installed early after the slab is installed, there is little room for construction delay, so that the entire construction period is not delayed.

Only rebar assembly can be done first and concrete can be installed at the same time.

Conventionally, after the mat was poured, the underground six floors were installed in a vertical structure in order of 5 underground floors, 4 underground floors, 3 underground floors, and 2 underground floors. Accordingly, in the past, the construction of 5 layers of sun tires was required for a total of 125 days for 25 days. However, according to the present invention, the odd-numbered layers were already completed before the mat was laid. It takes 25 days to construct the layer at the same time. As a result, conventionally, it takes 125 days after the mat is laid, but according to the present invention, it takes 25 days, resulting in 100 days shortening. As a result, the entire construction period is reduced by about 100%.

According to the present invention, the air shortening effect is about 3 months (about 8% of the total air) for 36 months compared to 39 months in the underground 6-story and 39-story office buildings on the ground.

The shortening of the entire construction period in offices, office buildings, etc. is expected to result in a reduction in construction costs such as construction management costs and on-site expenses in terms of construction companies, as well as high economic benefits such as premises sale, .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a whole flow diagram of a method for constructing an underground vertical member according to an embodiment of the present invention; FIG.
FIGS. 2 to 3 illustrate an example of a process chart of a 39-story office building according to the present invention.
4 is an enlarged process chart of the underground vertical member process according to the present invention shown in FIG.
5 is an example of a process chart at the latest start time of an underground vertical member to be installed one by one according to the present invention.
FIG. 6 is a chart showing the comparison between the earliest start time and the latest start time of the underground vertical member according to the present invention.
7 is an overall flow chart of a conventional method of constructing an underground vertical member of an existing construction method.
Figs. 8 to 9 show an example of a process chart of a 39-story office building to which an existing construction method is applied.
10 is an enlarged process chart of the underground vertical member process of the existing conventional process of FIG.
11 is a comparative process chart comparing the existing conventional method with the process of the underground vertical member to be installed one by one according to the present invention.
FIGS. 12 to 13 are diagrams showing a total process table (FIG. 8 and FIG. 9) of the existing conventional process and a total process table (FIG. 2 and 3) of the underground vertical member to be installed one by one according to the present invention, Comparison chart.
FIG. 14 is a process comparative graph comparing S-Curve shapes of the entire process charts (FIGS. 8 and 9) of the existing conventional process and the entire process charts of the underground vertical members to be installed one by one according to the present invention (FIGS.

Hereinafter, a method for constructing the vertical member of the underground layer of the alternate construction method, which is alternately applied according to the present invention, will be described in detail.

FIG. 1 is an overall flowchart of a method for constructing an underground vertical member of a back-road method to be installed one by one according to an embodiment of the present invention. The target project is the SRC office building with 6 floors underground and 39 floors above ground.

Referring to FIG. 1, in the method of constructing the underground vertical member according to the present embodiment, in the step of constructing the earth retaining structure (SlO), the slurry wall, CIP, H-pile, do.

In the step of constructing the underground pile (S20), in order to support the basement slab in the backfilling method, the pillars of the building are constructed from the ground to the base and the mat, and PRD and RCD are applied.

In the one-story slab construction step (S30), the one-story underground is erected and the steel beams, the deck plate and the concrete are laid using the columns constructed in the step (S20) to complete the one-story slab.

Underground slab In the slab construction phase (S40), the underground slab is erected and the underground slab is completed as in the first floor.

In the step of constructing the vertical member (core part, pillar) of the underground 1 layer, the core part of the underground 1 layer is completed from the underground 1 layer slab constructed in the step (S40) so that the core part frame can be constructed as the ground layer.

In the step (S60) of constructing the ground layer frame (primary), the ground layer core portion and the pillar are completed from the one-layer core portion and the pillar constructed in the step S50. For example, if it is possible to construct a frame only up to the 8th floor of the ground before the mat construction in accordance with the structure condition of the PRD file, the above-mentioned ground floor frame (primary)

In the slab construction step (S70) of the underground two-story slab, the underground three-story slab is constructed after the step (S40) and the underground two-story slab is constructed.

In the slab construction step (S80) of the underground three-story slab, the underground four-story slab is constructed after the step (S70).

In the step S90 of constructing the three-layered vertical member according to the feature of the present invention, the three-layered core portion is completed from the three-layered slab constructed in the step S80. In the step (S50), when the core part of the underground one layer is installed, the construction of the core part of the underground two layers is omitted and the core part of the underground three layers is installed.

Conventionally, the 3-layer core portion of the underground has been installed from the underground layer 6 to the underground portion after the mat has been poured. However, according to the present invention, the 3-layer vertical member underground has an effect of shortening the construction period by constructing one layer of the underground 1-layer core portion.

In the slab construction step (S100) of the underground four-story structure, the underground five-story slab is constructed after the step (S80) and the underground four-story slab is constructed.

In the slab construction step (S110) of the underground five-story slab, a six-story underground slab is constructed downwardly after the step (S100), and a slab with five stories underground is constructed.

In the step S120 for constructing the vertical member of the underground five-story structure according to the present invention, the underground five-story core is completed from the underground five-story slab constructed in the step S110. In the step (S90), after constructing the core portion of the underground three layers, the core portion of the underground four layers may be omitted, and the core portion of the underground five layers may be formed.

Conventionally, the underground five-story core portion has been constructed from a six-story underground structure after the mat has been poured. However, according to the present invention, the five-story vertical member underground has a feature that construction time is shortened by constructing a three-

The vertical member construction step (S90) of the underground three-story building and the vertical member construction step (S120) of the underground five-story building construction step are shortened before the mat is poured according to the features of the present invention.

Thereafter, in the foundation or mat construction step (S130), the base and mat are constructed after the final wave construction is performed in the downward direction following the step (S110). Once the mats have been applied, the U-turn is now turned upwards and the underground vertical members and the ground floor frames are simultaneously constructed. For example, until the mat construction, the ground frame can be raised up to 8 floors, and until the completion of the underground vertical member, it can be applied to the 15th floor. After completion of the underground vertical member, the roof layer can be applied to the uppermost floor.

When the foundation and the mat are completed (S140), the underground vertical member (core portion, column) is now constructed.

Underground underground vertical floor (S50), underground three storeys (S90) and underground five storeys (S120) were constructed in advance according to the present invention, so the remaining vertical members are six underground floors, four underground floors and two underground floors. In the present invention, since the core part is already installed on the upper and lower sides of the remaining vertical members (six underground, four underground, and two underground), it is advantageous in that it can be simultaneously installed at one time (S150, S160, S170).

Conventionally, after constructing the core part of the underground 6 layers, it was necessary to construct the underground 5 layers, followed by the underground 4 layers, the underground 3 layers, and the underground 2 layers. However, according to the present invention, only the remaining vertical members (six underground floors, four underground floors, two underground floors) can be constructed at the same time, so only one layer is required to be constructed.

Accordingly, before the mat is poured, the core portions of the two layers of 3 layers of underground and 5 layers of underground are first applied, and the remaining vertical members (6 layers of underground, 4 layers of underground and 2 layers of underground) It has an effect of preliminarily constructing the openings. Therefore, when 25 days are required for a single-story vertical member, it takes 125 days in the past, but according to the present invention, it takes 25 days and the entire construction period is shortened by 100 days.

As described above, when the underground vertical member is completed (S170), the ground floor frame (secondary) S180 can be started. For example, the ground floor frame (primary) can be constructed up to 15 stories above the ground until the underground vertical member is completed, and the ground floor frame (secondary) (S180) ) Can be constructed without restrictions.

FIGS. 2 to 3 are process charts of a method of constructing an underground vertical member according to an alternative embodiment of the present invention.

Referring to FIG. 2, the present embodiment is an office building with six basement floors and 39 floors above ground, and is an SRC tank top down method. The commencement date is January 1, 2019.

Referring to the process chart, the H-pile / CIP is constructed in the retaining construction phase (work number 6 in the first column on the left column of the progression table) and the working period is 80 days.

No. 7 Operation PRD is to construct a large number of piles in the basement, and the period is 70 days.

No. 8 Operation Underground 1 Story Groundwork and Slab 1 is a SRC construction work for the construction of the 1st floor steel bridge on the pile and the deck plate and concrete after completion of the 7th operation PRD construction. The duration is 50 days.

Operation After the completion of the first floor slab (8), the second floor of the basement and the slab construction of the first floor (9th operation) And the period is 50 days.

When the slab (9) of the first basement is completed, the core part and the pillar (22) of the first basement are constructed so that the construction can proceed to the ground level. As a result, the construction of the lower basement floor and the upgrading of the ground floor are performed at the same time, and this is generally referred to as top-down construction.

When the core part 22 of the underground first layer is completed, it is possible to continuously work from the two-level slab 25 to the eight-level slab 31 on the ground. At this time, PRD is applied to the ground layer load up to the 8th floor.

Since the 9-story slab 32 can proceed until the mat concrete 15 is constructed, the construction is suspended for about 4 months after the completion of the 8th story 31. [ Because the PRD can only support the load up to the 8th floor (31) according to the structural calculation, the 9th floor (32) can be launched after the mat placement.

Alternatively, the ground floor construction from the second floor may be started about 3 months late, so that the construction waiting period between the 8th and 9th floor is minimized, so that the construction can be continuously performed or the construction up to the 8th floor can be performed slowly.

When the underground slab 9 is completed, the underground 3-storey trench is downwardly constructed and the underground two-story slab 10 is constructed. The duration is 50 days.

When the two-story slab (10) is completed, the next three stories of the basement are constructed and the three-story slab (11) is constructed. The duration is 50 days.

When the underground three-story slab 11 is completed, the underground three-story core portion 20 is first constructed according to the feature of the present invention. In the conventional method, the core portion 20 of the underground 3 layer is constructed upward from the underground 6 layer after completion of the mat 15. Therefore, according to the present invention, the core portion 20 of the underground three-layer structure is constructed earlier than the existing construction method, and thus the construction period is shortened.

After the core portion 22 of the first underground layer is constructed, the core portion 20 of the underground three-layer structure is formed by crossing the underground two-layer core portion 21 of the lower layer. The reason for this is that it is difficult to construct the connection portion by constructing the core portion 21 of the underground two-layer structure immediately after the construction of the core portion 22 of the underground first layer. Therefore, when the core portion 20 of the underground three-layer structure is constructed by one layer after the construction of the core portion 22 of the underground one layer, the upper two layers of the underground structure are empty, .

When the core portion 22 of the first underground layer and the core portion 20 of the third underground layer are further separated, the underground two-layer core portion 21 therebetween can be sandwiched therebetween.

When the three-story slab (11) is completed, it continues to work downward. It constructs the slab (12) of the underground four stories after making the basement five stories and the period is 50 days.

When the underground four-story slab (12) is completed, it builds a slab (13) of five stories underground after six stories of underground tile, and the period is 50 days.

At this time, when the underground five-story slab 13 is completed, the underground five-story core portion 18 is first constructed according to the feature of the present invention. In the existing method, the core part (18) of the underground 5th floor is being constructed upward in order from the underground floor (6) after completion of the mat (15). Therefore, according to the present invention, the underground five-layer core portion 18 has a feature of constructing earlier than the existing construction method, and the entire construction period is shortened.

After the core portion 20 of the underground three layers is constructed, the core portion 18 of the underground four layers is passed over the core portion 19 of the underground layer. The reason for this is that it is difficult to construct the connection portion by constructing the core portion 19 of the underground four-story structure immediately after the construction of the core portion 20 of the underground three-story structure. Is the same as that of the core portion 20 of the three-layered structure.

After the digging of the basement 6th floor, the matte digger 14 is installed and the foundation mat 15 is constructed.

When the mat 15 is completed, the ground layer can go up to the ninth layer 32 or more because the mat 15 supports the load sustained by the PRD.

On the other hand, the reason for restricting the increase of the ground layer to 15 layers only until the completion of the underground vertical member after the construction of the mat (15) is due to the buckling of the underground PRD and the exposure of about 5 layers of PRD pillars from the underground level to the underground level . However, according to the present invention, because the odd number of layers is already applied, the PRD column is exposed only at a height of one layer, so that the buckling restriction is small, so that a new effect of constructing a higher ground layer according to the ground layer construction method is exhibited.

After the completion of the mat 15, the remaining frames in the underground layer are the core portion 17 of the underground 6 layer, the core portion 19 of the underground layer 4, and the core portion 21 of the underground 2 layer. Since the three-layered structure 20 and the five-layered core portion 18 are completed in advance, the remaining three core portions can be sandwiched therebetween.

According to an aspect of the present invention, since the odd-numbered core portion is already constructed, the remaining three layers can be operated at the same time or at the same time or in sequence.

On the other hand, reinforcing bars may be previously installed in the construction of the underground two-story core portion 21 and the underground four-story core portion 19, and the concrete may be simultaneously poured after the mat 15 is poured to further increase productivity.

Therefore, three layers (about 75 days) have been required because three layers have to be constructed in order of the sun tails. However, according to the feature of the present invention, the remaining three layers can be simultaneously applied at the same time, It takes only a period of time to shorten two layers.

According to the present invention, the underground three-story core portion 20 and the underground five-story floor 18 are preliminarily constructed before the mat construction in order to shorten the construction period of the two layers. After the mat 15 is placed, Three core portions (17, 19, 21) are temporarily installed to shorten the two-layer period, thereby reducing the construction period of four layers in total. Since the core portion of the underground layer is a critical path, the total air is shortened.

Referring to Fig. 3, the frame construction from the 5th floor to the 39th floor is shown together with the finishing work as the final work. According to the calculations of the backfat structure, the 9-story slab 32 can be started after the placement of the mat, and the 16-story slab 39 is completed with the underground vertical members being completed. From the 16th floor to the 39th floor, the 6-day cycle frame is underway and the normal one-year finish is applied. The finishing work includes interior decoration, elevator construction, exterior curtain wall, tower crane dismantling, rooftop construction, landscaping, etc. after completion of the roofing frame.

Accordingly, the entire construction period of the 39-storey office building is 1,106 days (about 36 months) as shown in the first operation of FIG. 2 when the underground vertical member method is applied. Compared with the existing construction method, the whole construction period is shortened by about 3 months.

4 is an enlarged process chart of the underground vertical member process of FIG.

4, the vertical members (underground single-layer core portion 22, underground three-layer core portion 20, underground five-layer core portion 18) of the odd- Quot; Three layers of vertical members (the underground six-story core portion 17, the underground four-story core portion 19, and the underground two-story core portion 21) of the remaining remaining even- .

The remaining even-numbered layers of vertical members 17, 19 and 21 have the feature that they can be installed at the same time by interposing the odd-numbered layers already.

FIG. 5 is an example of a process chart at the earliest start time of the underground vertical member to be viewed one by one according to the present invention.

The earliest start time is the work schedule that can be constructed at the latest without affecting the subsequent process. The slowest possible start or finish is a schedule that can be applied at the latest without affecting the subsequent process.

Referring to FIG. 5, the core portion 22 of the first underground layer is constructed after completion of the underground one-story slab for the underground construction (25 ~). Next, the underground three-story core portion 20 indicates that the even-numbered underground vertical members 17, 19, and 21 can be installed at the latest before the construction.

FIG. 6 is a chart showing the comparison between the fastest start time and the latest start time of the underground vertical member to be installed one by one according to the present invention. FIG. 6 is a diagram illustrating the construction of the underground vertical member at a certain date or at a certain point in time since the order of construction has been determined.

Referring to FIG. 6, work numbers 16 through 21 represent a quick process (FIG. 4), and work processes 23 through 28 represent a late process (FIG. 5). The core part of the third basement underground can be compared through quick work 20 and late work 27. That is, if you look at the launching column at the bottom of the 3rd floor, you can start fast on January 1, 2020, and start from May 27 to 20th, 2020. Of course, between January 1 and May 15, you can start any time in between.

As described above, FIGS. 1 through 6 illustrate the construction and operation of the underground vertical member construction method according to the present invention.

Next, the concept of the underground vertical member construction and the embodiment of the existing existing construction method will be described in the backfill method from FIG. 7 to FIG.

FIG. 7 is an overall flowchart of an underground vertical member construction method of a conventional existing construction method in a backfilling method.

Referring to FIG. 7, after installing a retaining wall (T10) on the outside of a building, a PRD or RCD pile (T20) is installed under the floor to form a backframe. After that, underground slabs are being constructed downward (T30 ~ T100). After the digging of the underground six stories (T100), the foundation and mat (T110) are completed.

Subsequently, the underground vertical members T130 to T170 are sequentially installed upward from the underground 6th floor (T130).

On the other hand, the ground layer completes the core portion (T50) of the first underground layer, and then constructs the ground layer frame (primary) (T60). For example, until the mats are poured, the slabs on the 8th floor of the governor are constructed. After the mat is laid, the ground floor framing (secondary) (T180) is constructed from the 9th floor to the 15th floor. When the underground vertical members T130 to T170 are completed, construction can be carried out without restriction from the 16th floor.

Conventional back-up method is applied downward from the ground to the mat at the lowest floor, then turns on the mat as a turning point, and the underground vertical member is installed in an upside-down direction.

Therefore, there is a feature that the order of the basement is long and the underground construction period takes a lot of time.

Figs. 8 to 9 are all the process charts of the conventional backhoe method.

Referring to FIG. 8, the conventional back-up method is an office building with six basement floors and 39 floors above ground, and is an SRC-type tower top down method. The commencement date is January 1, 2019. 2. The reason why the existing process is applied to explain the process table is to examine the difference in the construction sequence with the construction method according to the present invention and the difference in the entire construction period.

Referring to the process chart, the retaining construction phase (operation number 6 in the first column on the left column of the process table) is H-pile / CIP operation and the period is 80 days.

No. 7 Operation PRD is to construct a large number of piles in the basement, and the period is 70 days.

No. 8 Work Underground 1 Story Construction of the 1st floor slab is 7 days. When the PRD work is completed, the SRC works to install the 1st floor steel bridge on the pile and place the deck plate and concrete. The duration is 50 days.

Operation When the slab (1) is completed, the underground two-storey trencher and the underground one-storey slab construction (No. 9 operation, 50 days.

When the slab (9) of the first basement is completed, the core part and the pillar (22) of the first basement are constructed so that the construction can proceed to the ground level. As a result, the construction of the lower basement floor and the upgrading of the ground floor are performed at the same time, and this is generally referred to as top-down construction.

When the core part 22 of the underground first layer is completed, it is possible to continuously work from the two-level slab 25 to the eight-level slab 31 on the ground. At this time, PRD supports the ground layer loads up to 8 stories.

Since the 9-story slab 32 can be constructed after the mat concrete 15 is installed, the construction is suspended for about 4 months after completion of the 8th story 31. [ Since the PRD can only support loads up to the 8th layer (31) on the ground, the 9th layer (32) can be launched after the mat is poured.

When the underground slab 9 is completed, the underground 3-storey trench is downwardly constructed and the underground two-story slab 10 is constructed. The duration is 50 days.

After completing the two-story slab (10), the third floor slab (11) is constructed after the fourth floor slab is lowered. The duration is 50 days.

When the three-story slab (11) is completed, the construction work continues downward. The construction of the slab (12) underground is carried out for a period of 50 days.

When the underground four-story slab (12) is completed, it builds a slab (13) of five stories underground after six stories of underground tile, and the period is 50 days.

After the digging in the underground 6th floor, the foundation or the mat 15 is installed after the matter 14 is installed. When the mat 15 is completed, the ground layer can go up to the ninth layer 32 or more because the mat 15 supports the load sustained by the PRD.

When the mat 15 is completed, the underground vertical members 17 to 21 are continuously connected directly from the underground six-layer core portion 17 to the underground two-layer core portion 21, do. During this period, the ground layer can be constructed from the 9th floor (32) to the 15th floor (38).

Referring to Fig. 9, the 10th floor to 39th floor and finishing work are shown on the ground. The sixteen-story slab 39 has a milestone table in which all the underground vertical members are completed and started. From the 16th floor, the 6-day cyclocross frame construction was conducted to the top floor without any underground flooring.

Therefore, the entire construction period of the 39th floor office building is 1,194 days (about 39 months) as shown in the first operation of FIG. 8 when the underground vertical member construction method according to the present invention is applied.

The total air of the 39 months is longer than the 36 months of the total air according to the invention by 3 months. The reason for this is that it takes a lot of time to construct the underground vertical wall from the 6th floor to the 2nd floor in order.

10 is an enlarged process chart of the underground vertical member process of the existing conventional process of FIG. After the construction of the mat (15), the underground vertical member indicates that the work is sequentially carried out from work number 17 to work number 21, and the period is 130 days and takes about 4.3 months.

11 is a comparative process chart comparing the processes of the underground vertical member process of the conventional process and the process of the underground vertical member of the process according to the present invention.

Referring to FIG. 11, the operation numbers 1 to 19 are the process steps of the conventional method, the operation numbers 20 to 38 are the process steps according to the present invention, and the operation number 39 shows the difference in the construction time period between the conventional method and the present invention method.

First, in the conventional method, the core portions of the five underground layers from the work 12 to the work 16 are sequentially applied after the mat 10, and it takes 130 days.

However, according to the present invention, operations 31 to 35 require only 30 days after the mat (29) construction, indicating that the present invention is 100 days shorter (39).

The reason for this is that the core portion 34 of the third underground layer and the core portion 32 of the underground 5 layer were previously formed and the three core portions 31, 33, and 35 remaining after the construction of the mat 29 were simultaneously or at the same time This is because they can be installed by inserting each. As a result, the conventional method requires five times of construction. However, in the present invention, the effect of shortening 100 days of four layers by the construction corresponding to only once is required. I will exert.

FIGS. 12 to 13 are diagrams showing a comparison table of the overall process charts (FIGS. 8 and 9) of the existing conventional process and the process charts of the underground vertical members (FIGS. 2 and 3) .

Referring to FIG. 12, it can be seen that the total air difference (operation number 1) by the two methods is 36 months compared with about 39 months, which is 88 days, which is about 3 months, and about 8% of the total air is shortened.

Subterranean digging and backing slabs and mat construction (6 ~ 15) are the same in both methods.

A difference occurs from the underground vertical member, and the underground vertical member (core portion) is alternately installed downward according to the present invention, and the remaining core portion is constructed at the same time.

The last column (I) is a value obtained by subtracting the layer completion date (E column) of the existing method from the floor completion date (H column) according to the present invention.

Starting from the 16th floor (39) above, the gap of 88 days is fixed and will continue until the construction is completed.

Referring to FIG. 13, a certain difference (I completion date difference column) from the 16th floor (39) to the 88th floor is continued until completion.

FIG. 14 is a view showing an overall process chart (FIGS. 8 and 9) of an existing conventional method and an entire process table of an underground vertical member to be installed one by one according to the present invention (FIGS. 2 and 3) As shown in FIG.

Referring to FIG. 14, the blue line represents the existing method, and the red line represents the method of the present invention.

The construction started on January 1, 19, and the underground 6th floor mat was laid on June 8, 2020 (the lowermost point in the graph).

Thereafter, the red line according to the present invention shows that one layer has been already applied to two layers, and three layers are simultaneously applied in one month to complete the underground vertical member and then to 16 layers.

On the other hand, the conventional blue line indicates that after the mat construction, the underground vertical member is installed in about 4.3 months after the mat construction, and then it is led to 16 layers. From the 16th floor and above, both methods are the same.

As described above, the difference between the existing method and the method of the present invention is compared with the process table, the table and the graph.

The following is a description of a case in which some operations are performed differently in the embodiment of the present invention.

In the case of the construction where the last wave is underground 5th floor, underground core part 1 underground and underground 3 layer are first downwardly constructed. After completion of matting, 5 underground layers are constructed and 4 underground and 2 underground layers are simultaneously applied. . Therefore, the remaining core portion after the mat is applied twice.

In the case where the final trencher is underground 4th floor, underground core part 1 underground and underground 3 layer are first installed downward, and after completion of mat, underground 4 layer and underground 2 layer core part can be constructed at the same time. It is the same concept as the underground six-story construction.

There is a case where the lowest floor of the underground floor is not high and the two lowest floor (for example, the underground 5th floor and the underground 6th floor) are tear down at the same time, the mat is completed, and then the underground 5th floor slab is constructed. At this time, the core part of the underground 6 layers and the slab of the underground 5 layers are simultaneously applied, and the core part of the underground 5 layers is constructed. Therefore, the remaining core portion after the mat is applied twice.

As described above, in the case where the underground layer is divided into the odd-numbered layer and the lowermost layer at the same time, a case where the remaining core portion is sequentially applied twice after the completion of the mat is generated in some works. Therefore, according to an embodiment of the present invention, the remaining core part is completed at a time after completing one core part, and in some construction, a case where the remaining part is applied twice is derived.

The process table of the embodiment is prepared by the program for preparing a process chart and the date calculation is an accurate example. The red bar chart in the process chart indicates the main task of determining the total air as the main critical path. A blue bar represents a work with a float. Therefore, in order to shorten the air, it is necessary to shorten the red color which is the main line. A connection line containing arrows connecting the bars of the process chart (Relationship indicates the precedence and trailing relationship between tasks.

As described above, according to the feature of the present invention, there is some derivative sequential core part construction depending on the characteristics of the site based on the idea of completing the core part alternately in order to shorten the air of the underground core part that determines the entire construction period . However, unlike the sequential core part construction method which is an existing construction method, the partially modified core part construction method based on the idea of shortening the entire construction period through the single core part construction method according to the present invention, As well as the construction industry.

Claims (12)

In the construction of an underground vertical member of a building for constructing a ground floor frame to be installed upward in parallel with downward construction of an underground structure,
A first step of downwardly installing the terraced slab and the basement slab;
A second step of preliminarily constructing an underground vertical member by one step;
A third step of installing one or more remaining underground vertical members remaining after the second step construction at the same time or twice;
The method according to any one of claims 1 to 3, The method according to claim 1,
If the underground layer is six layers underground,
Underground slabs are constructed in such a manner that the core portions of the underground 1 layer, the underground 3 layers and the underground 5 layers are constructed in advance while the core portions of the underground 6 layers, underground 4 layers and underground 2 layers are simultaneously constructed. A method of shortening the air through a filtering method. The method according to claim 1,
When the underground layer is five layers underground,
The underground slab was downgraded to one underground and one underground and three underground core parts were constructed in advance, and then the underground five core core part was constructed and the underground four layers were constructed. Wherein the construction is performed in parallel during the installation of the underground vertical member. The method according to claim 1,
When the underground layer is four layers underground,
The underground slab is downwardly installed and the core part of the underground 1 layer and the underground 3 layer is constructed in advance and then the core part of the underground 4 layer core part and the core part of the underground 2 layer are constructed at the same time. Shortening method. The method according to claim 1,
In the case where the lowest layer of the underground layer and the two layers as the upper layer portion thereof are simultaneously touched,
Wherein the bottom core slab is downwardly applied to the bottom core slab, and the bottom core slab is downwardly applied to the bottom core slab. A method of shortening the air through. 6. The method according to any one of claims 1 to 5,
Wherein the core part to be installed before and after the step of installing the core part and the remaining core parts to be installed at the same time are separately divided into a front part and a rear part based on the mat putting operation. 6. The method according to any one of claims 1 to 5,
The work schedule of each of the core units,
The construction is carried out within the range of the earliest possible start date which is started after completion of the slab of the corresponding layer and the late finish date which is completed before the time of constructing the remaining core part after the slab. A method of shortening the air through the construction method of one underground vertical member. 6. The method according to any one of claims 1 to 5,
Wherein the underground vertical member includes a column connected to a core portion or a ground layer. The method according to claim 1,
The underground vertical member, which is installed one by one,
(Or even layer) of the underground slab (or even layer), and after the mat or base construction, the core portion of the even layer (or odd layer) or the vertical member of the column Wherein the construction is carried out twice in accordance with a site condition. The method according to claim 1,
The subsequent construction of the remaining core portion at a later time,
Wherein the method further comprises the step of installing the reinforcing bars of the remaining core part as early as possible and then pouring the concrete as a subsequent step at the same point of time. (a) constructing a permanent earth retaining wall in the ground by a conventional method;
(b) vertically installing the pillar from the ground on the ground layer core portion and the pillar installed upward in parallel with the downward construction of the underground structure when constructing the underground structure and the ground structure;
(c) a step of excavating the ground 1 floor and constructing the floor part, then excavating the ground 1 floor and constructing the floor part;
(d) constructing the underground core portion of one underground or underground multiple layers in order to support the ground layer core portion which is preferentially installed upward in the downward direction of the remaining underground layers in order and constructing the bottom portion;
(e) installing a ground layer core portion in an upper direction preferentially on the upper portion of the underground core portion to be installed first, and installing the underground layer frame in a downward direction in parallel with the upper core portion;
(f) installing the underground one-story core portion first in the downward direction of the underground frame, and then installing each of the underneath core portions in a downward direction;
(g) forming a base portion after the basement frame is completed up to the base portion, and installing the core portion of the remaining layer downward one by one from the lowest layer to the upper portion, either sequentially or sequentially to the underground core portion of the preferred construction;
(h) Including the construction of the completion of the construction through the residual flooring construction of the ground floor and the finishing work which is the final work,
Wherein the underground core portion is installed or simultaneously installed within a constant possible range to eliminate the entire construction period from the critical path, which is a main fixation line, to shorten the entire construction period. 12. The method of claim 11,
The method of claim 1 or 2, wherein the step of installing the odd-numbered core portions comprises the step of forming the odd-numbered core portions, wherein the core portions of the remaining layers include core portions of even- Wherein the lowermost core portion and the upper core portion are successively formed according to site characteristics.

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