WO2020262735A1 - 하나 걸러 번갈아 시공되는 역타공법의 지하 수직부재 공사방법 - Google Patents

하나 걸러 번갈아 시공되는 역타공법의 지하 수직부재 공사방법 Download PDF

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Publication number
WO2020262735A1
WO2020262735A1 PCT/KR2019/007842 KR2019007842W WO2020262735A1 WO 2020262735 A1 WO2020262735 A1 WO 2020262735A1 KR 2019007842 W KR2019007842 W KR 2019007842W WO 2020262735 A1 WO2020262735 A1 WO 2020262735A1
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Prior art keywords
basement
construction
core part
constructed
floor
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PCT/KR2019/007842
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English (en)
French (fr)
Korean (ko)
Inventor
양경옥
Original Assignee
양경옥
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Filing date
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Application filed by 양경옥 filed Critical 양경옥
Priority to PCT/KR2019/007842 priority Critical patent/WO2020262735A1/ko
Priority to KR1020217041259A priority patent/KR20220024070A/ko
Priority to JP2021577996A priority patent/JP2022554045A/ja
Priority to CN201980097932.3A priority patent/CN114008270A/zh
Priority to US17/623,168 priority patent/US20220243418A1/en
Publication of WO2020262735A1 publication Critical patent/WO2020262735A1/ko

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/02—Foundation pits
    • E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
    • E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
    • E02D29/055—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench further excavation of the cross-section proceeding underneath an already installed part of the structure, e.g. the roof of a tunnel
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/06—Foundation trenches ditches or narrow shafts
    • E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
    • E02D17/083—Shoring struts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2220/00—Temporary installations or constructions
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0004—Synthetics
    • E02D2300/0018—Cement used as binder
    • E02D2300/002—Concrete
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0026—Metals
    • E02D2300/0029—Steel; Iron

Definitions

  • the present invention is to shorten the period of the basement frame work in the top-down of the construction work reverse-throwing method, and more specifically, the basement vertical members are alternately constructed downwards, and the mats and the vertical members of the remaining floor after the foundation are constructed. At the same time, it is possible to shorten the basement vertical member and the entire construction period by providing a construction method for collective construction.
  • the reverse drilling method (top-down, top-down) is a construction method that shortens the construction period by constructing a frame work on the ground floor while forming a frame work to the basement floor.
  • the order of construction of the general basement back-throwing method is to install soil barriers and pillars, digging each floor, and constructing slabs, and finally, constructing the lowermost foundation or mat, having a depth of 4 to 7 floors below the ground.
  • the pile pillars are constructed at the beginning of the construction, and the core of one basement level is constructed for the ground floor framing work, and the remaining vertical members are installed in a sunta (from lower to upper floors) after the foundation or mat is placed.
  • the ground floor framing work is constructed at the same time as the basement floor, but the number of floors that go up before foundation and mat construction and the number of floors that go up until the completion of the underground vertical member is structurally limited. For example, it is only possible to slabs up to 8 floors above ground until foundation and mats are placed, and up to 15 floors above the ground until the underground vertical member is completed, and there is a construction constraint that allows you to climb to the rooftop without restrictions after the underground vertical member is completed. Is granted.
  • the above-ground frame construction should be constructed only up to the 8th or 15th floor and should be stopped and waited.
  • the basement floor frame work is accelerated, the ground floor frame work is also accelerated, and the entire construction period is greatly affected by the basement floor construction.
  • the construction of the ground floor frame takes 6 to 7 days to construct one base floor, and four or more floors are constructed in one month, but the basement floor takes 1.5 months or two months for one floor, so the construction speed of the basement floor is relatively slow.
  • the conventional underground construction sequence is progressed by soil barriers, piles, digging and slab construction down each floor, foundation or mat construction at the lowest level, and sequential construction upstream of the underground vertical members.
  • the basement vertical member has a feature that proceeds as a sunta (construction from the lower floor to the upper floor) after the foundation or mat is placed.
  • the construction period of the underground vertical member takes 20 to 25 days for the construction of one floor, and 4 to 5 months for the 6th basement floor.
  • Underground vertical members are installed in a sunta (from bottom to top) after the foundation or mat is placed. Since the ground level can continue to rise after the underground vertical member is completed, the underground vertical member is a critical path that determines the construction period.
  • the construction speed of the ground floor frame is fast, with a cycle of 6 to 7 days per floor, whereas the number of floors that can be climbed to the time of placing the basement mat (for example, 8 floors above the ground) and the completion of the underground vertical member (15 floors above the ground) is limited. Construction interruption and waiting for construction occur at the inflection point of the floor and the 15th floor above the ground.
  • the reverse punching method has the advantage of shortening the construction period by constructing the ground floor while constructing the basement layer.
  • the above-ground floor cannot rise more than a certain number of floors depending on the construction speed of the basement floor, the air is greatly affected by the underground frame construction.
  • the present invention was invented to solve the above-described problems according to the prior art, and in the reverse punching method, the construction period of the underground vertical member can be shortened so that the above-ground floor frame construction can be continuously carried out. Accordingly, the total construction period is shortened. do.
  • the method for constructing an underground vertical member alternately constructed one by one according to the present invention alternately constructs every other underground vertical member downward, and after that, the remaining vertical members are Distributed between the previously constructed vertical members and simultaneously fitted and constructed.
  • the construction period is shortened by pre-installing a number of underground vertical members in the overall process schedule and excluding them from the main line (Criticla path) that determines the construction period.
  • the underground vertical member can be constructed early after the slab construction of the corresponding floor, there is little room for delay in construction, so the entire construction period is not delayed.
  • Construction period can be further shortened by constructing only rebar assembly first and placing concrete at the same time.
  • the present invention in an office building with 6 floors below ground and 39 floors above ground, it shows the effect of shortening the construction period of about 3 months (about 8% of the total air) to 36 months compared to 39 months.
  • 1 is an overall flowchart of a method for constructing an underground vertical member that is constructed every other time according to the present invention.
  • 2 to 3 is an example of a process schedule of a 39-story office building of the underground vertical member construction method to be constructed every other time according to the present invention.
  • Figure 4 is an enlarged process table of the underground vertical member process according to the present invention of Figure 2.
  • Figure 5 is an example of a process schedule of the latest start point of the underground vertical member to be constructed every other according to the present invention.
  • Figure 6 is a comparison process table of the earliest and the latest initiation point of the underground vertical member to be constructed every other according to the present invention.
  • FIG. 7 is an overall flow chart of a conventional underground vertical member construction method of the conventional method.
  • 8 to 9 are examples of a schedule of a 39-story office building to which a conventional conventional construction method is applied.
  • FIG. 10 is an enlarged process table of the underground vertical member process of the conventional conventional method of FIG. 8.
  • 11 is a comparative process table comparing the process of the conventional conventional construction method and the underground vertical member to be constructed every other time according to the present invention.
  • FIG. 14 is a process comparison graph comparing the overall process table (FIGS. 8 and 9) of the conventional conventional method and the overall process table (FIGS. 2 and 3) of every other underground vertical member constructed according to the present invention in S-Curve form.
  • FIG. 1 is an overall flowchart of a method of constructing an underground vertical member of the reverse punching method that is constructed every other time according to an embodiment of the present invention.
  • the project to be implemented is an SRC office building with 6 stories below ground and 39 stories above ground.
  • a soil barrier is constructed in the basement based on the outer wall of the basement layer of the building, and a slurry wall, CIP, H-Pile, and earth plate are constructed. do.
  • the pillars of the building are constructed from the ground to the foundation and the mat to support the basement slabs in the reverse punching method, and PRD and RCD are constructed.
  • the first basement floor is excavated, and the first-floor slab is completed by pouring steel beams, deck plates, and concrete using the columns constructed in step (S20).
  • the second basement level is excavated, and the first basement level slab is completed like the first level.
  • the first basement level core part is completed from the first basement level slab constructed in the step (S40) so that the core part frame can be constructed upward to the ground level.
  • the ground-floor core portion and pillars are completed from the first basement core portion and pillars constructed in the step (S50). For example, if the structural condition of the PRD pile allows only 8 floors above the ground to be constructed before mat construction, the above ground floor frame (1st) is constructed up to 8 floors above the ground.
  • the third basement level is dug downward, and then the second basement level slab is constructed.
  • the slab construction step (S80) of the 3rd basement level after the step (S70), the 4th basement level is dug downward, and the slab of the 3rd basement is constructed.
  • the basement three-story core part is completed from the basement three-story slab constructed in the step (S80).
  • the step (S50) after constructing the first basement core part, if the construction of the second basement core part is omitted and the third basement core part is installed every other floor, the construction can be performed in a straightforward manner.
  • the core part of the basement 3rd floor was constructed sequentially from the 6th floor of the basement after the mat was placed, but according to the present invention, the vertical member of the basement 3rd floor has the effect of shortening the construction period by constructing one floor after the core part of the 1st basement is constructed.
  • the slab construction step (S100) of the fourth basement level after the step (S80), the 5th basement level is dug downward, and then the slab of the fourth basement level is constructed.
  • a core part of the fifth basement level is completed from the slab of the fifth basement level constructed in the step (S110).
  • step (S90) after constructing the core of the third basement level, if the construction of the core of the fourth basement is omitted and the core of the 5th basement is constructed every other floor, it can be constructed in a straightforward manner.
  • the core part of the basement 5th floor was constructed sequentially from the 6th floor of the basement after the mat was placed, but according to the present invention, the vertical member of the basement 5th floor is constructed one floor after the core part of the 3rd basement level is constructed, thereby shortening the construction period.
  • the three basement vertical member construction step (S90) and the fifth basement vertical member construction step (S120) are a method of pre-installing one layer before placing the mat in accordance with the features of the present invention to shorten the construction period.
  • the foundation and mat are constructed.
  • the ground frame can be raised up to 8 floors before mat construction, up to 15 floors can be constructed until the basement vertical member is completed, and the top floor, the roof layer, can be constructed after the basement vertical member is completed.
  • the first basement level (S50), the basement level 3 (S90), and the basement level 5 (S120) were constructed in advance according to the present invention, so the remaining vertical members are 6 basement levels, 4 basement levels, and 2 basement levels.
  • the remaining vertical members 6 basement levels, 4 basement levels, 2 basement levels
  • the 5th basement level was constructed, followed by 4 basement levels, 3 basement levels, and 2 basement levels in order.
  • the remaining vertical members (6 basement levels, 4 basement levels, and 2 basement levels) can be constructed at the same time, only a period of construction of one floor is required.
  • the core part of the two floors of the 3rd basement and 5th basement is first constructed before the mat is placed, and the remaining vertical members (6th, 4th, and 2nd floors) are simultaneously constructed after the mat is placed.
  • the remaining vertical members (6th, 4th, and 2nd floors) are simultaneously constructed after the mat is placed.
  • the ground floor frame (secondary) (S180) may be started next.
  • the ground floor frame (primary) can be constructed up to 15 floors above the ground until the basement vertical member is completed, and after the basement nonwoven member is completed, it is a ground floor frame (secondary) (S180) from the 16th floor to the top (roof). ) Can be constructed without restrictions.
  • 2 to 3 are the overall process table of the construction method of the underground vertical member of the reverse punching method alternately constructed every other according to an embodiment of the present invention.
  • this embodiment is an office building with 6 floors below ground and 39 floors above the ground, and is an SRC-style top-down construction method. Construction commences on January 1, 2019.
  • H-pile / CIP is constructed in the soil barrier construction stage (job number 6 in the first column on the left of the process table) and the work period is 80 days.
  • the 7th PRD is to construct a number of pile posts in the basement floor, and the period is 70 days.
  • the first floor basement excavation and the first floor slab of the 8th operation are SRC construction in which the first floor steel frame beams are installed on the piles and the deck plates and concrete are poured after the 7th PRD work is completed.
  • the duration is 50 days.
  • the first basement core part and the pillar 22 are constructed so that the construction can proceed to the ground level. Accordingly, the basement floor downwork and the ground floor upwork are performed at the same time, and this is generally referred to as a top-down construction.
  • the 9th floor slab 32 can proceed only when the mat concrete 15 is installed, construction is stopped for about 4 months after the 8th floor 31 is completed. Since the PRD can only support the load up to the 8th floor 31 above the ground according to the structural calculation, the 9th floor 32 can be started after the mat is placed.
  • construction of the ground floor from the 2nd floor can be started about 3 months late to minimize the waiting period between the 8th and 9th floors, so that the construction can be continuously constructed or the construction up to the 8th floor can be proceeded slowly.
  • the excavation of the third basement floor is then made downward and the second basement slab 10 is constructed, and the period is 50 days.
  • the basement 3 floor core part 20 is first constructed according to the features of the present invention.
  • the core part 20 on the 3rd basement floor is constructed upward from the 6th basement level after the mat 15 is completed. Therefore, according to the present invention, the basement three-layer core part 20 is constructed first compared to the existing construction method, thereby reducing the construction period.
  • the core part 20 on the third basement level is constructed by skipping the core part 21 on the second basement level in the lower level.
  • the reason is that it is difficult to construct the connection part to construct the core part 21 on the second basement level, which is the lower level after the construction of the core part 22 on the first basement level. Therefore, if the first basement level core part 22 is constructed and then the third basement level core part 20 is constructed every other floor, the upper level, which is the second basement level, is empty. .
  • the second basement level core part 21 between them can be sandwiched and constructed.
  • the 6th basement level is dug and then the 5th basement level slab 13 is constructed, and the period is 50 days.
  • the core part 18 of the 5th basement level is first constructed according to the features of the present invention.
  • the core part 18 on the 5th basement level is constructed upwards in order from the 6th basement level after the mat 15 is completed. Therefore, according to the present invention, the core part 18 on the 5th basement floor has a characteristic of being constructed first compared to the existing construction method, and the entire construction period is shortened.
  • the core part 18 of the 5th basement level is constructed by skipping the core part 19 of the 4th basement level below the basement level. The reason is that it is difficult to construct the connection part to construct the core part 19, which is the lower level, after the construction of the core part 20 on the 3rd basement level. It is the same as the case of the core part 20 on the 3rd basement level.
  • the ground floor can rise above the 9th floor 32.
  • the reason why the above-ground floor can only be raised to 15 floors after mat 15 construction is completed until the basement vertical member is completed is because the basement layer PRD is buckling, and about 5 PRD columns are exposed from the 6th basement level to the 2nd basement level. .
  • the PRD column is exposed only one floor high, so there is little buckling restriction, thus exhibiting a new effect that a higher ground layer can be constructed according to the ground layer construction method.
  • the remaining frames in the basement level are the core part 17 on the 6th basement level, the core part 19 on the 4th basement level, and the core part 21 on the 2nd basement level. Since the 3rd basement level 20 and the 5th basement level core part 18 were completed in advance every other level, the remaining 3 story core parts may be installed by sandwiching between them.
  • the remaining three layers can be simultaneously or at the same time or in sequence.
  • reinforcement is pre-installed, and the concrete is poured at the same time after the mat 15 is poured to further increase productivity.
  • the construction period of the two floors was shortened by pre-installing the basement 3 floor core part 20 and the basement 5 floor 18 before the mat construction, alternately with every other basement vertical member, and after the mat 15 was placed
  • the period of two floors is shortened, resulting in a reduction in the construction period of a total of four floors.
  • the core of the basement layer is the main line (Critical Path), so the total construction period is shortened.
  • the finishing work which is the last work, is displayed along with the framing work from the 5th floor to the 39th floor above the ground.
  • the 9-floor slab 32 can be started after the mat is poured, and the 16-floor slab 39 is completed and undertaken after all of the underground vertical members are completed.
  • the frame was framed in a 6-day cycle, and a typical year was applied for finishing.
  • Finishing work includes interior interior work, elevator work, temporary dismantling of external curtain walls, tower cranes, etc., rooftop work, and landscaping work after the roof frame is completed.
  • the entire construction period of the 39-story office building takes 1,106 days (about 36 months) as shown in the first operation of FIG. 2 when applying the underground vertical member construction method that is constructed every other time according to the present invention.
  • FIG. 4 is an enlarged process chart of the underground vertical member process of FIG. 2.
  • the vertical members of the odd number of the underground vertical members are the slabs of the corresponding floor. It indicates to start after.
  • Vertical members of the remaining even-numbered layers are constructed in parallel at the same time after the mat 15 is placed. It shows that it becomes.
  • every other layer has a feature that can be simultaneously installed by sandwiching between them.
  • the latest initiation point refers to the work schedule that can be constructed at the latest without affecting subsequent processes.
  • start or finish refers to the schedule that can be constructed at the latest without affecting subsequent processes.
  • the first basement core part 22 is constructed after completion of the first basement slab for ground floor construction (25 ⁇ ). Next, it is shown that the core part 20 on the 3rd basement floor can be constructed the latest before the even-numbered basement vertical members 17, 19, and 21 are constructed.
  • 6 is a comparison process chart of the earliest and the latest undertaking of an underground vertical member constructed every other time according to the present invention. 6 illustrates the contents of the date or at which point construction is performed on the process table because the construction order of the underground vertical member has been determined.
  • operation numbers 16 to 21 indicate a fast process (Fig. 4), and operation numbers 23 to 28 indicate a late process (Fig. 5).
  • the core section on the 3rd basement floor can be compared through 20 quick jobs and 27 late jobs.
  • the 3rd basement floor can be started quickly on January 1, 2020 by looking at the start column at No. 20, and on May 15, 2020 at No. 27. Of course, you can launch anytime between January 1st and May 15th.
  • FIG. 7 is an overall flowchart of a method of constructing an underground vertical member of the conventional conventional method in the reverse punching method.
  • a PRD or RCD pile (T20) is constructed in the basement to form an inverted frame. After that, the underground slab is constructed downward while digging the underground (T30 ⁇ T100). After excavation of the 6th basement floor (T100), the foundation and mat (T110) are completed.
  • the underground vertical members T130 to 170 are constructed sequentially upward from the 6th basement floor (T130).
  • the ground floor frame (primary) (T60) is constructed.
  • the 8th floor slab is constructed.
  • the above-ground floor frame (secondary) (T180) is constructed from the 9th to the 15th floor.
  • the underground vertical members (T130-170) are completed, it can be constructed from the 16th floor above the ground without restrictions.
  • the existing reverse punching method is an office building with 6 floors below and 39 floors above the ground, and is a top-down construction method of SRC tank and back stroke. Construction commences on January 1, 2019. Same as FIG. 2.
  • the reason for explaining the process schedule by applying the existing construction method is to examine the difference between the construction order and the total construction period from the construction method according to the present invention.
  • the construction stage of the soil barrier (job number 6 in the first column on the left of the process table) is H-pile / CIP work, and the period is 80 days.
  • the 7th PRD is to construct a number of pile posts in the basement floor, and the period is 70 days.
  • Step 8 Excavation of the first basement floor and the construction of the slab on the first floor are SRC work in which the first floor steel beams are installed on piles and the deck plates and concrete are poured after the 7th PRD work is completed, and the duration is 50 days.
  • the first basement core part and the pillar 22 are constructed so that the construction can proceed to the ground level. Accordingly, the basement floor downwork and the ground floor upwork are performed at the same time, and this is generally referred to as a top-down construction.
  • the 9th floor slab 32 can be constructed only when the mat concrete 15 is poured, the construction is stopped for about 4 months after the 8th floor 31 is completed. Since the PRD can only support the load up to the eighth floor (31) above the ground, the ninth floor (32) can be started after the mat is placed.
  • the excavation of the third basement floor is then made downward and the second basement slab 10 is constructed, and the period is 50 days.
  • the construction continues downward. After excavating the 5th basement level, the 4th basement slab 12 is constructed, and the period is 50 days.
  • the 6th basement level is dug and then the 5th basement level slab 13 is constructed, and the period is 50 days.
  • the foundation or mat (15) is constructed.
  • the mat 15 since the mat 15 supports the load supported by the PRD, the ground floor can rise above the 9th floor 32.
  • the basement vertical members (17 to 21) are continuously directly connected from the 6th basement core part 17 to the 2nd basement core part 21, and it takes 25 to 30 days per floor. do.
  • the ground floor can be constructed from the 9th floor (32) to the 15th floor (38).
  • the entire construction period of the 39-story office building takes 1,194 days (about 39 months) as shown in the first operation of FIG. 8 when applying the underground vertical member construction method that is constructed every other time according to the present invention.
  • the total air of the 39 months is 3 months longer than the total air of 36 months according to the present invention.
  • the reason is that it takes a lot of time to construct the underground vertical walls in sequential order from the 6th basement level to the 2nd basement level.
  • FIG. 10 is an enlarged process table of the underground vertical member process of the conventional conventional method of FIG. 8. It indicates that the basement vertical member is being constructed sequentially from work number 17 to work number 21 after the mat 15 is constructed, and the period is 130 days and takes about 4.3 months.
  • 11 is a comparative process table comparing the process of the underground vertical member process of the conventional conventional method and the process of the underground vertical member constructed every other time according to the present invention.
  • operation numbers 1 to 19 are process tables of the conventional method
  • operation numbers 20 to 38 are process tables according to the present invention
  • operation number 39 indicates the difference in construction period between the conventional method and the present invention method.
  • the core part of the five basement floors from operations 12 to 16 is sequentially constructed after the mat 10 is constructed, indicating that it takes 130 days.
  • 12 to 13 is a schedule comparison table comparing the schedule difference for each floor between the overall process table (FIGS. 8 and 9) of the conventional conventional method and the overall process table (FIGS. 2 and 3) of every other underground vertical member constructed according to the present invention. .
  • the difference in the total air (operation number 1) by the two methods is 88 days, which is 36 months compared to about 39 months, which is about 3 months and about 8% of the total air is reduced.
  • the last column (I) is a value obtained by minus the completion date for each floor (column E) of the conventional method from the completion date for each floor (column H) according to the present invention.
  • FIG. 14 is an S-Curve form of the overall process table (FIGS. 8 and 9) of the conventional conventional method and the overall process table (FIGS. 2 and 3) of the underground vertical member constructed in accordance with the present invention and FIGS. It is a process comparison graph represented by and compared.
  • the blue line represents the conventional method
  • the red line represents the method of the present invention.
  • the red line according to the present invention indicates that every other two floors are already constructed, and three floors are simultaneously constructed in one month to complete the basement vertical member, and then the 16th floor.
  • the conventional blue line indicates that after the mat construction, the underground vertical member for each floor took about 4.3 months to be constructed and then connected to the 16th floor. From the 16th floor and above, the two construction methods are the same.
  • the first basement level and 3 basement levels are constructed downward first, and after the mat is completed, the 5 basement levels are constructed, and the 4 basement levels and the 2 basement levels are simultaneously constructed. Can be. Therefore, the remaining core part after the mat is constructed twice.
  • the basement core part is constructed with the 1st basement level and the 3rd basement level downward first, and after the mat is completed, the 4th basement level and the 2nd basement core part can be constructed at the same time. It is the same concept as the 6-story basement construction.
  • the remaining core is constructed two times after mat completion. Therefore, according to one embodiment of the present invention, after completing every other core part, the remaining core part is completed at once, and in some constructions, the case of constructing the remaining part twice is derived.
  • the process schedule of the above embodiment is prepared by a program specializing in making a process schedule, so that the date calculation is an example.
  • the Kant chart which is a red bar chart on the milestone, represents the main task of determining the total air as the critical path of the main line.
  • the blue bar chart refers to a task that has a float for the number of days to spare. Therefore, in order to shorten the period, the red color, which is the main line, must be shortened.
  • the core construction method partially modified based on the idea of shortening the entire construction period through the construction method of every other core construction according to the present invention is the idea of the present invention. It will be obvious to those who do construction work that it is included in this category.
  • the construction sequence is as follows.
  • the following is a sequence of a vertical member construction method in the case of the seventh basement level of the reverse punching method alternately constructed every other according to an embodiment of the present invention.
  • the remaining floors are 7 basement levels, 6 basement levels, 4 basement levels, and 2 basement levels.
  • each layer is constructed and constructed four times.
  • Each floor is constructed and constructed three times (a total of three divided constructions).
  • the remaining 2 floors are constructed one by one (2 times in total).
  • top-down construction is mostly being constructed in urban areas.

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  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
PCT/KR2019/007842 2019-06-27 2019-06-27 하나 걸러 번갈아 시공되는 역타공법의 지하 수직부재 공사방법 WO2020262735A1 (ko)

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KR1020217041259A KR20220024070A (ko) 2019-06-27 2019-06-27 하나 걸러 번갈아 시공되는 역타공법의 지하 수직부재 공사방법
JP2021577996A JP2022554045A (ja) 2019-06-27 2019-06-27 一階おきに交互に施工される逆打ち工法の地下垂直部材工事方法
CN201980097932.3A CN114008270A (zh) 2019-06-27 2019-06-27 每隔一个交替施工的反钻法地下垂直构件施工方法
US17/623,168 US20220243418A1 (en) 2019-06-27 2019-06-27 Method for alternately constructing underground vertical members using top-down construction method

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CN112982484B (zh) * 2021-03-04 2022-07-12 中国建筑第八工程局有限公司 地下地上结构半同步顺作施工方法

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