CN111962666A

CN111962666A - Construction method of building internal structure

Info

Publication number: CN111962666A
Application number: CN201910417045.1A
Authority: CN
Inventors: 尹衍樑; 王瑞祯; 陈智轩
Original assignee: Ruentex Engineering and Construction Co Ltd
Current assignee: Ruentex Engineering and Construction Co Ltd
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-11-20
Anticipated expiration: 2039-05-20
Also published as: CN111962666B

Abstract

The invention provides a construction method of an internal structure of a building. The method comprises the following steps: (a) providing a first pre-cast bathroom floor structure at a first height of a first level of a building structure; (b) arranging a lower short beam at a second height of the first floor to one side of a stair setting area, the second height of the first floor being higher than the first height of the first floor; (c) connecting a first end of a lower precast stair with the lower short beam; (d) providing a beam at a first height of a second storey above the first storey to span opposite sides of the building structure; (e) arranging an upper short beam at the first height of the second floor on the other side of the stair placement area relative to the side, wherein the end of the upper short beam is connected with the cross beam; and (f) connecting two end parts of the upper precast stair to the lower short beam and the upper short beam respectively.

Description

Construction method of building internal structure

Technical Field

The invention relates to a construction method of an internal structure of a building.

Background

The rapid construction of high quality buildings has long been a sought goal of the construction and construction industry. Among the construction methods, the precasting construction method has been successfully applied to various buildings and construction projects due to its advantages of excellent quality, safe and rapid construction, economic and reasonable construction cost, etc. The precast method is to manufacture a reinforcing structure, such as a reinforcement cage, to construct a formwork and to pour concrete, by using standardized work processes and modularized molds around a precast plant or a construction site, and to rapidly mass-produce structural members, such as a column, a beam, and a plate, having high precision and high quality uniformity. Subsequently, the produced structural members are assembled on the site by precise handling management and assembly work on the site. Therefore, the workload in the construction site can be reduced to the minimum, the manpower and the construction time are reduced, and the construction period is shortened. In addition, the construction method can reduce or avoid scaffold construction, and greatly improves the construction safety.

The conventional precasting method is used for upwards constructing a structural body in a layer-by-layer mode, a floor structure of the lowest floor is required to be completed firstly, the floor structure comprises all structures such as beams, columns, floor plates, stairs and bathrooms, and then the structures are constructed layer by layer upwards, so that an improvement space is provided in the aspect of construction speed, and the requirements of the industry are further met. In view of the above, it is a long-felt desire in the industry to develop an external main structure capable of quickly constructing a plurality of stories and quickly installing a stair and a toilet structure inside each story to further increase the construction speed.

Disclosure of Invention

Accordingly, to achieve the above objects, an embodiment of the present invention relates to a method for constructing an internal structure of a building, including the steps of: (a) providing a first pre-cast bathroom floor structure at a first height of a first level of a building structure; (b) arranging a lower short beam at one side of a stair placement area at a second height of the first floor, the second height of the first floor being higher than the first height of the first floor; (c) connecting the end part of the lower precast stair with the lower short beam; (d) providing a beam at a first height of a second storey above the first storey to span opposite sides of the building structure; (e) arranging an upper short beam at the first height of the second floor on the other side of the stair placement area relative to the side, wherein the end of the upper short beam is connected with the cross beam; and (f) connecting two end parts of the upper precast stair with the lower short beam and the upper short beam respectively.

Another embodiment of the present invention relates to a construction method of an internal structure of a building, including the steps of: (a') hoisting a first toilet unit pre-configured with a wall structure and an internal structure to a first floor of the building structure; (b') providing a lower stub at a second height of the first level to one side of a landing zone, the second height of the first level being higher than the first height of the first level; (c') connecting the end of the lower precast stairway to the lower short beam; (d') providing a beam at a first height of a second storey above the first storey to span opposite sides of the building structure; (e') providing an upper short beam at the first height of the second floor on the other side of the landing zone relative to the side, the end of the upper short beam connecting the cross beam; and (f') connecting two end parts of the upper precast stair with the lower short beam and the upper short beam respectively.

Another embodiment of the present invention relates to a construction method of an internal structure of a building, including the steps of: (a ") providing a first pre-cast bathroom floor structure at a first elevation on a first level of a building structure, and providing a column in said building structure; (b ") providing a lower stringer to a side of a landing zone at a second elevation of the first level, the second elevation of the first level being higher than the first elevation of the first level; (c ") connecting the end of the lower precast stairway to the lower short beam; (e ") providing an upper short beam at a first height of the second level to the other side of the landing zone relative to the side, the upper short beam having an end connected to the post; and (f') connecting two end parts of the upper precast stair with the lower short beam and the upper short beam respectively.

Drawings

Fig. 1A is a schematic structural view showing a building structure according to the present invention.

Fig. 1B is a partially enlarged view of fig. 1A.

Fig. 2A is a plan view of the present invention showing a building structure wherein a floor is not configured with a stair placement section and a toilet placement section.

Fig. 2B and 2C are plan views showing the configuration of the first floor of the building structure including a stair placement area and a toilet placement area in accordance with the present invention.

Fig. 2D and 2E are plan configuration views of the present invention showing the second and higher floors of the building structure including a stair-setting section and a toilet-setting section.

Fig. 3A to 3H are schematic structural views showing the internal structure of a building at different stages according to the first embodiment of the present invention.

Fig. 4A to 4C are schematic views illustrating a bonding process of the second coupling part for fixing the cross beam to the precast beam-column structure according to the embodiment of the present invention.

Fig. 5A to 5C are schematic views illustrating a bonding process of the first coupling part for fixing the lower short beam to the precast beam-column structure according to the embodiment of the present invention.

Fig. 6A to 6D are schematic views illustrating a bonding process of a second coupling part for fixing a cross beam to a precast beam column structure according to another embodiment of the present invention.

Fig. 7A to 7C are schematic views illustrating a coupling process of fixing the lower precast stairway to the lower short girder and the upper short girder according to the embodiment of the present invention.

FIG. 8 is a schematic structural view showing the second pre-cast toilet floor structure disposed in a toilet installation area in accordance with the present invention.

Fig. 9A to 9F are schematic structural views of the inner structure of the building constructed according to the second embodiment of the present invention at different stages.

Fig. 10A is a plan view of a building structure without a stair placement section and a toilet placement section according to another embodiment of the present invention.

Fig. 10B and 10C are plan configuration views showing a building structure including a stair-setting section and a toilet-setting section according to another embodiment of the present invention.

Fig. 11A to 11G are schematic structural views of the internal structure of a building at different stages according to a third embodiment of the present invention.

FIG. 12 is a schematic structural view of a pre-cast floor structure incorporating a second pre-cast bathroom floor structure of the present invention.

Detailed Description

For a better understanding of the features, content, and advantages of the invention, as well as the advantages thereof, reference should be made to the following detailed description of illustrative embodiments, which is to be read in connection with the accompanying drawings, wherein the same or similar components are illustrated in the drawings and are in no way intended to be considered limiting.

Please refer to fig. 1A and 1B. Fig. 1A is a schematic view showing the structure of a building structure 1 according to the present invention. Fig. 1B is a partially enlarged view of fig. 1A. The building structure 1 includes a plurality of precast beam column structures 2 disposed at corners and peripheral positions of a predetermined area a at predetermined intervals L1. The precast beam-column structure 2 includes a column structure 21 of a plurality of stories in height and a beam structure 22 having a length of approximately half of a predetermined interval L1 at first heights h3, h5, h7 of second and higher stories as a load-bearing structure of the multi-story building. In the present embodiment, the column structure 21 and the beam structure 22 of the precast beam-column structure 2 are reinforced concrete structures.

As shown in fig. 1B, the beam structure 22 of the precast beam-column structure 2 has a plurality of beam ribs 224 protruding from a free end 223 of the beam structure 22. In the present embodiment, two rows of upper and lower beam ribs 224 protrude from the free end 223 of the beam structure 22, and the arrangement and number of the beam ribs 224 can be adjusted according to the requirement. Because the beam rib 224 of the beam structure 22 of the precast beam-column structure 2 at the adjacent position is pre-sleeved with the reinforcement connector 225 and the stirrup 226 is sleeved on the periphery of the beam rib 224, when the beam ribs 224 of the beam structure 22 of the precast beam-column structure 2 at the adjacent position are aligned with each other, the two ends of the reinforcement connector 225 are respectively connected with the corresponding beam ribs 224 of the beam structure 22 of the precast beam-column structure 2 at the adjacent position by moving the reinforcement connector 225, and the stirrup 226 sleeved on the periphery of the beam rib 224 is moved, so that the stirrup 226 is sleeved and fixed on the beam rib 224 at the predetermined interval L2. In an embodiment of the present invention, the beam rib 224 of the beam structure 22 of the precast beam-column structure 2 has an external thread (not shown), and the reinforcement bar adapter 225 has a corresponding internal thread (not shown). The reinforcement bar connector 225 can be screwed into the beam rib 224 in one direction (e.g., clockwise or counterclockwise) to a first distance, such that the reinforcement bar connector 225 is sleeved on the beam rib 224, and when the beam rib 224 of the beam structure 22 of the precast beam-column structure 2 at an adjacent position is aligned, the reinforcement bar connector 225 is screwed out of the beam rib 224 in another direction (e.g., counterclockwise or clockwise) to a second distance (the second distance is shorter than the first distance), such that the reinforcement bar connector 225 is sleeved on the other adjacent beam rib 224.

In this embodiment, the length of the precast beam column structure 2 is about 14 to 15 meters, which is a height of three stories. However, the present invention is not limited to this length, and the building structure 1 is not limited to three floors, and the number of floors can be adjusted as desired. The 15 meter length of this embodiment or shorter lengths of the other embodiments, such as around 10 meters, are to comply with the regulations on load length of a typical truck or trailer when transporting the precast beam column structure 2. However, in other embodiments, the precast beam column structure 2 may be implemented near a worksite, in which case its length may be adjusted to the actual circumstances, for example, may be 18 meters, 20 meters, or more.

Referring to fig. 2A to 2E, fig. 2A is a plan view showing a building structure 1 according to the present invention, in which a stair installation area and a toilet installation area are not installed on one floor. Fig. 2B and 2C are plan configuration views showing the first floor of the building structure 1 including a stair placement area and a toilet placement area according to the present invention. Fig. 2D and 2E are plan configuration views showing the second and higher floors of the building structure 1 including a stair-setting section and a toilet-setting section according to the present invention. As shown in fig. 2A, each floor of the building structure 1 is divided into a plurality of areas a1, a2, A3, a4 in the first direction D1 at substantially the pitch of the precast beam-column structure 2. The toilet installation T and the stair installation S can be planned in a plurality of areas a1, a2, A3, a4, depending on the actual space allocation requirements, for example: in fig. 2B, the toilet installation area T and the stair installation area S are planned in the original area a1 of the first floor. The toilet and stair sections T, S may also be planned in different areas of the first floor, such as: in fig. 2B, the toilet installation area T and the stair installation area S are planned in the original area a2 and the original area a1, respectively. In addition, as shown in fig. 2D, in the spatial arrangement of the second floor and the higher floors of the building structure 1, the cross beams 5 are provided at the heights h3, h5 (as shown in fig. 1A) between the areas where the toilet installation area T and the stair installation area S are located and the adjacent areas thereof, for example: the bathroom installation area T and the stair installation area S are planned in the original area a1, and a cross beam 5 is provided between the area a1 and the area a 2. As shown in fig. 2E, the toilet installation area T and the stair installation area S are located in the original area a1 and the original area a2, respectively, and the cross beams 5 are disposed between the area a1 and the area a2 and between the area a2 and the area A3.

Otherwise, the floors of the building structure 1 can be configured in the same way, for example: the plan configuration of the first floor of the building structure 1 is as shown in fig. 2B, and the plan configuration of the second floor and higher floors is as shown in fig. 2D. Further, the various floors of the building structure 1 may be arranged in different ways, for example: the plan configuration at the first floor of the building structure 1 is the configuration shown in fig. 2B, the plan configuration at the second floor is the configuration shown in fig. 2E, and the plan configuration at the higher floor is the configuration shown in fig. 2D or fig. 2E.

Fig. 3A to 3H are schematic structural views showing the internal structure of a building at different stages according to the first embodiment of the present invention. Please refer to fig. 2B, 3A and 3B simultaneously. Fig. 3A and 3B illustrate the construction of a first storey of a building structure 1 according to the invention, comprising the following steps:

step (a), as shown in fig. 2B and 3A, the first precast lavatory floor structure 31 is disposed at the first height h1 of the first floor of the building structure 1 in the lavatory installation area T, and the first height h1 of the first floor is approximately at the floor level of the first floor. The first pre-cast bathroom floor structure 31 is configured to pre-embed and configure bathroom plumbing. Furthermore, the implementation of the first floor of the building structure 1 may be adjusted as required to perform step (a) after step (b) or step (c).

Step (B), as shown in fig. 2B and 3A, the lower short beam 41 is disposed at a second height h2 of the first floor of the building structure 1 at one side of the stair installing section S, wherein the second height h2 of the first floor is approximately at a half floor height of the first floor and is higher than the first height h1 of the first floor. As shown in fig. 3A, both end portions of the lower short beam 41 are connected to a first precast beam column structure 201 and a second precast beam column structure 202 at adjacent positions in the precast beam column structure, respectively.

And (c) connecting both ends of the lower precast stairway 61 of the first floor to predetermined positions of the lower short beam 41 and the floor of the first floor of the building structure 1, respectively, as shown in fig. 3A and 3B.

Step (d), as shown in fig. 3B, beams 5 are positioned at a first height h3 of a second floor of building structure 1 to span opposite sides of building structure 1. The two ends of the cross beam 5 are connected to a second precast beam column structure 202 and a third precast beam column structure 203 opposite to the second precast beam column structure, respectively.

And (e) as shown in fig. 2D, 3A and 3B, arranging the upper short beam 42 at the first height h3 of the second floor on the other side of the stair arranging area S opposite to the lower short beam 41, and respectively connecting the cross beam 5 and the fourth precast beam column structure 204 to both ends of the upper short beam 42.

And (f) connecting the two end parts of the upper precast stairway 62 of the first floor to the lower short beam 41 and the upper short beam 42 of the first floor, respectively, as shown in fig. 3A and 3B.

Please refer to fig. 2D, 3C and 3D simultaneously. As shown in fig. 3C and 3D, the construction of the second floor of the building structure 1 comprises the following steps:

step (g), as shown in fig. 2D and 3C, the second precast lavatory floor structure 32 is disposed at the second floor's first height h3 in the building structure 1 in the second lavatory installation site T, the second floor's first height h3 being approximately at the floor location of the second floor. The second pre-cast bathroom floor structure 32 is configured to pre-embed and configure bathroom plumbing. As shown in fig. 2D and 3C, a second pre-cast lavatory floor structure 32 is provided in a partial region of the second level of the lavatory installation site T, and a floor structure 91 is provided in the remaining region of the second level of the lavatory installation site T. Furthermore, the implementation of the second floor of the building structure 1 may be adjusted to the implementation of step (g) after step (h) or step (i), as required.

Step (h), as shown in fig. 2D and 3C, the lower short beam 41 is disposed at a second level h4 of the second floor of the building structure 1 at one side of the stair placement section S of the second floor, wherein the second level h4 is located at approximately half the height of the second floor and higher than the first level h3 of the second floor. As shown in fig. 3C, both ends of the lower short beam 41 of the second layer are connected to the first precast beam column structure 201 and the second precast beam column structure 202 at adjacent positions in the precast beam column structure, respectively.

Step (i), as shown in fig. 3C and 3D, both end portions of the lower precast stairway 61 of the second floor are connected to the lower short beam 41 of the second floor and the upper short beam 42 of the first floor, respectively.

Step (j), as shown in fig. 3D, beams 5 are provided at first height h5 of the third floor of building structure 1 to span opposite sides of building structure 1. Both ends of the cross beam 5 are connected to a second precast beam column structure 202 and a third precast beam column structure 203 opposite to the second precast beam column structure 202, respectively.

Step (k), as shown in fig. 2D and 3D, the upper short beam 42 is disposed at the first height h5 of the third floor on the other side of the stair installing section S opposite to the lower short beam 41. As shown in fig. 3D, both ends of the upper short beam 42 are connected to the second-layer cross beam 5 and the fourth precast beam column structure 204, respectively.

Step (l), as shown in fig. 3C and 3D, both end portions of the upper precast stairway 62 of the second floor are connected to the lower short beam 41 and the upper short beam 42 of the second floor, respectively.

When the building structure 1 needs to be provided with bathrooms and stairs of more than two floors, repeating the steps (g) to (l) on higher floors above the second floor until the highest floor is completed. After step (l), further comprising the steps of:

and (m) paving the staggered reinforcing steel bar structures 92 on the floor slab structures 91 of the second floor and the floors above the second floor as shown in fig. 3E. As shown in fig. 3E and 3F, concrete 13 is poured on the reinforcing structure 92 laid on the floor structure 91.

And (n) constructing a wall surface structure 35 and assembling an internal structure of the bathroom on the first precast bathroom floor structure 31 and the second precast bathroom floor structure 32 on the first layer and the second precast bathroom floor structure 32 on the second layer as shown in fig. 3G to form a first bathroom unit 33 and a second bathroom unit 34 as shown in fig. 3G, and further building a plate 37 on the surface of the wall surface structure as shown in fig. 3H. In addition, when the building structure 1 only needs to be provided with the first floor of stairs and toilets, the step (n) is directly performed after the step (f), the first precast toilet floor structure 31 is constructed into a wall structure and the interior structure of the toilet is assembled to form the first toilet unit and the panels 37 are built on the wall structure.

As shown in fig. 3A and 3B, the precast beam-column structure 2 is provided with a first joint member 71 for connecting the lower short beam 41 and the upper short beam 42. The precast beam column structure 2 is provided with a second joint member 72 for connecting the cross beam 5. In the present embodiment, the second precast beam column structure 202 and the third precast beam column structure 203 are provided with the second coupling parts 72 at the first heights h3, h5, h7 of the second and higher floors for coupling the cross beam 5. The first precast beam column structure 201 and the second precast beam column structure 202 are provided with first joint members 71 at the second heights h2, h4, h6 of the respective floors for connecting the lower short beams 41. In addition, the first joint parts 71 are arranged at the first heights h3, h5 and h7 of the second floor and the upper floor of the fourth precast beam column structure 204, and the third joint parts (not shown in the figure) are arranged at the positions of the cross beams 5 of each floor corresponding to the fourth precast beam column structure 204 and are used for connecting the upper short beams 42.

Referring to fig. 4A to 4C, a schematic diagram of a bonding process of fixing the cross beam 5 to the second joint part 72 of the precast beam-column structure 2 according to an embodiment of the present invention is shown, which includes the following steps:

in steps (d) and (j), as shown in fig. 4A, the cross beam 5 is hoisted to abut the second joint member 72 to prepare for joining the cross beam 5 to the second joint member 72 on the precast beam-column structure 2. In this embodiment, the cross member 5 is a steel beam, and the second engaging member 72 is an elongated plate member. The outer end portion 721 of the second engaging member 72 is further provided with a plurality of through holes 722 (fourth through holes) for connecting the cross member 5. The plurality of perforations 722 are generally vertically arranged in a double row linear arrangement. The cross member 5 includes an upper wing plate 51, a lower wing plate 52, and a web 53. The lower wing plate 52 is substantially parallel to the upper wing plate 51, and the upper and lower ends of the web 53 are substantially vertically connected to the lower side of the upper wing plate 51 and the upper side of the lower wing plate 52. The top surface 511 of the upper wing plate 51 is provided with a plurality of shear pins 512. The end 54 of the beam 5 has a plurality of perforations 541. In the embodiment of the present invention, a plurality of through holes 541 (sixth through holes) are located in the web 53 of the cross member 5 and are vertically arranged substantially in a double row linear formulation, and correspond to the plurality of four through holes 722 of the outer end portion 721 of the second engaging member 72. Furthermore, as shown in fig. 4B and 4C, after aligning the plurality of through holes 541 of the end 54 of the cross beam 5 with the plurality of through holes 722 of the end 721 of the second joint member 72 (as shown in fig. 4B), the constructor passes the plurality of fasteners 10 (second fasteners, for example, fixing bolts) through the plurality of through holes 722 of the end 721 of the second joint member 72 and the plurality of through holes 541 of the end 54 of the cross beam 5 and then engages with corresponding nuts (not shown), thereby fixing the cross beam 5 to the precast beam column structure 2 (as shown in fig. 4C).

Referring to fig. 5A to 5C, a process for fixing the lower short beam 41 to the first engaging member 71 of the precast beam-column structure 2 according to the embodiment of the present invention is schematically illustrated.

Regarding the combination of the lower short beam 41 and the first joint member 71 of the precast beam-column structure 2 in the steps (b) and (h), the combination of the cross beam 5 and the joint member 71 in the previous embodiment is substantially the same, but the dimensions and specifications of the lower short beam 41 and the first joint member 71 may be adjusted differently according to the needs. In the present embodiment, the lower short beam 41 is a steel beam. The lower short beam 41 is hoisted to abut the first joint member 71 in preparation for joining the lower short beam 41 to the first joint member 71 on the precast beam column structure 2. The outer end 711 of the first engaging member 71 is further provided with a plurality of through holes 712 (third through holes) for connecting the lower short beam 41. The plurality of perforations 712 are arranged vertically in a substantially double row linear configuration. The lower stub beam 41 includes an upper wing plate 411, a lower wing plate 412, and a web 413. The lower wing plate 412 is substantially parallel to the upper wing plate 411, and the upper and lower ends of the web 413 are substantially vertically connected to the lower side of the upper wing plate 411 and the upper side of the lower wing plate 412. The end 414 of the lower short beam 41 has a plurality of through holes 4141. In the embodiment of the present invention, a plurality of through holes 4141 are located in the web 413 of the lower short beam 41 and are vertically arranged substantially in a double row linear formulation, and correspond to the plurality of through holes 712 of the outer end portion 711 of the first engaging member 71. Further, as shown in FIGS. 5B and 5C, after aligning the plurality of through holes 4141 of the end portion 414 of the lower short beam 41 with the plurality of through holes 712 of the end portion 711 of the first coupling member 71 (as shown in FIG. 5B), the constructor fixes the lower short beam 41 to the precast beam-column structure 2 (as shown in FIG. 5C) by engaging a plurality of fasteners 11 (first fasteners, e.g., fixing bolts) with corresponding nuts (not shown) after passing through the plurality of through holes 712 of the end portion 711 of the first coupling member 71 and the plurality of through holes 4141 of the end portion 414 of the lower short beam 41.

In the present embodiment, the dimensions and specifications of the upper short beam 42 are substantially the same as those of the lower short beam 41. A third joint member is provided at a position of the cross beam 5 corresponding to the fourth precast beam column structure 204. The coupling manner of the upper short beam 41 to the first coupling member 71 and the third coupling member in steps (e) and (k) is also substantially the same as the coupling manner of the lower short beam 41 to the first coupling member 71 in the above-described embodiment. In other embodiments of the present invention, the size and specification of the upper short beam 42 are not limited to be the same as those of the lower short beam 41, and different sizes and specifications may be adopted according to the requirement.

Referring to fig. 6A to 6D, a schematic diagram of a bonding process for fixing a cross beam 5 'to a second bonding member 72' of a precast beam-column structure 2 according to another embodiment of the present invention is shown, which includes the following steps.

In steps (d) and (j), as shown in fig. 6A, the cross beam 5' is hoisted to the vicinity of the second coupling part 72' in preparation for coupling the groove 55' of the cross beam 5' to the second coupling part 72' of the precast beam-column structure 2. In this embodiment, the beam 5' is a cast-in-place reinforced concrete structure or a precast reinforced concrete structure. As shown in fig. 6B, the cross beam 5' is engaged with the second engaging member 72' through the groove 55' to be fixed to the precast beam column structure 2. The cross beam 5' extends upwards from the bottom surface 56' of its end 54' with a groove 55' of a first length L1, the first length L1 being smaller than the height H of the cross beam, while the second engagement member 72' has a second length L2 in its longitudinal direction. Since the second length L2 of the second engaging member 72' is smaller than the first length L1 of the groove 55' of the cross beam 5', when the second engaging member 72' is engaged in the groove 55' of the cross beam 5', the second engaging member 72' can be completely engaged in the groove 55' of the cross beam 5', and the accommodating space S is still formed in the groove 55' below the second engaging member 72 '. In the present embodiment, after the groove 55' of the cross member 5' is aligned with the second engaging member 72' in the lateral direction, the cross member 5' is moved in the vertically downward direction by hanging, and the second engaging member 72' is engaged in the groove 55' of the cross member 5 '. As shown in fig. 6C and 6D, the constructor forms and grouts the joints between the cross beams 5' and the precast beam-column structures 2. In order to fill the gap at the joint of the beam 5 'and the precast beam-column structure 2, the connection of the left side, the right side and the bottom side of the joint of the beam 5' and the precast beam-column structure 2 and the bottom side of the groove 55 'are sealed by the template 57'. Subsequently, the holes 58 'reserved from the top surface 511' of the cross beam 5 'are grouted so that concrete or cement mortar can fill the gaps at the connection between the cross beam 5' and the precast beam-column structure 2, the gaps between the grooves 55 'and the second coupling members 72', and the receiving spaces S below the grooves 55 'along the holes 58'. And after the concrete or cement mortar is cured, removing the template 57', namely finishing the joint fixation of the beam 5' and the precast beam-column structure 2.

Referring to fig. 7A to 7C, a schematic view of a bonding process of fixing the lower precast stairway 61 to the lower short beam 41 of the floor and the upper short beam 42 of the lower floor according to an embodiment of the present invention is shown, which includes the following steps.

In the steps (c) and (i), the lower precast stairway 61 is fixed to a predetermined position (not shown) of the lower short beam 41 of the floor and the upper short beam 42 of the lower floor or the first floor by the engagement of the engaging concave portion 63 and the engaging convex portion 43. As shown in fig. 7A, a plurality of engaging protrusions 43 are disposed on the top surface 4111 of the lower short beam 41 and the top surface 4211 of the upper short beam 42 or at predetermined positions (not shown) of the first floor. In the present embodiment, the top surface 4111 of the lower short beam 41 and the top surface 4211 of the upper short beam 42 each have four engaging protrusions 43, but the number of the engaging protrusions 43 may be adjusted as required, and is not limited to the above number. The engaging protrusion 43 is a cylindrical body, and the bottom thereof is welded and fixed to the top surface 4111 of the lower short beam 41 and the top surface 4211 of the upper short beam 42. As shown in fig. 7B, the lower precast stairway 61 is hoisted to the vicinity of the lower and upper

short girders

41 and 42 in preparation for coupling the lower precast stairway 61 to the lower and upper

short girders

41 and 42. The two

end portions

611, 612 of the lower precast stairway 61 are respectively provided with a plurality of engaging recesses 63 which are engaged with the engaging protrusions 43. In the embodiment, the two

end portions

611 and 612 of the lower precast stair 61 respectively have two engaging recesses 63, but the number of the engaging recesses 63 can be adjusted according to the requirement, and is not limited to the above number. After the engaging concave portion 63 of the lower precast stair 61 is aligned with the engaging convex portions 43 of the lower short beam 41 and the upper short beam 42, the lower precast stair 61 moves in a vertically downward direction to engage the engaging convex portions 43 in the engaging concave portion 63. As shown in fig. 7C, after the engaging convex portion 43 is engaged with the engaging concave portion 63, an abutting member 64 is disposed on the top of the engaging convex portion 43 to engage the engaging convex portion 43 with the engaging concave portion 63. In other embodiments of the present invention, the two ends of the lower precast stairway may be provided with fastening protrusions, and the predetermined positions of the lower short beam and the first floor may be provided with fastening recesses (not shown).

In addition, the size and specification of the upper precast stairway 62 are substantially the same as those of the lower precast stairway 61, so that the combination manner of the upper precast stairway 62 with the lower short beam 41 and the upper short beam 42 in the steps (f) and (l) is also substantially the same as that of the lower precast stairway 61 with the lower short beam 41 and the upper short beam 42 in the previously described embodiment. In other embodiments of the present invention, the size and dimension of the upper pre-cast stair 62 are not limited to be the same as those of the lower pre-cast stair 61, and different sizes and dimensions may be adopted according to the requirement.

Please refer to fig. 2D, 3B, 3C and 8. FIG. 8 is a schematic view of the present invention showing the second pre-cast bathroom floor structure 32 disposed in a bathroom fixture area. The fifth precast beam casting structure 205 and the sixth precast beam casting structure 206 of the precast beam column structure 2 are provided with the first receiving member 81 at the first heights h3, h5 of the second and higher floors in advance. The cross beam 5 is provided with a second support member 82 corresponding to the support members 81 of the fifth precast beam column structure 205 and the sixth precast beam column structure 206. When the second pre-cast bathroom floor structure 32 is disposed in the toilet installation area T, the first supporting members 81 of the fifth and sixth pre-cast beam-

column structures

205 and 206 support one side of the bottom of the second pre-cast bathroom floor structure 32, and the second supporting members 82 of the cross beam 5 support the other side of the bottom of the second pre-cast bathroom floor structure 32. As shown in FIG. 8, the bottom of the second pre-cast lavatory floor structure 32 includes a support structure 36, and the support structure 36 includes an outer steel beam 361 framed around the perimeter of the bottom 321 of the pre-cast lavatory floor structure 32 and an inner steel beam 362 disposed at a distance from and connecting opposite sides of the outer steel beam 361.

Referring to fig. 9A to 9F, fig. 9A to 9F are schematic structural views of an internal structure of a building at different stages according to a second embodiment of the present invention. In the steps (a ') and (g') of the second embodiment, after the wall surface structure 35 is constructed and the interior structure of the toilet is assembled in advance to form the first toilet unit 33 and the second toilet unit 34, respectively, in the first precast toilet floor structure 31 and the second precast toilet floor structure 32, the first toilet unit 33 and the second toilet unit 34 are respectively hoisted to the toilet installation areas of the first floor and the second floor and the upper floors. Step (b '), step (c'), step (d '), step (e'), step (f ') of the remaining first floor and step (h'), step (I '), step (j'), step (k '), step (l') and step (m ') of the second and higher floors, and step (b), step (c), step (d), step (e), step (f), step (h), step (I), step (j), step (k), step (l) and step (m') of the previously described first embodiment.

Please refer to fig. 10A to 10C. Fig. 10A shows another embodiment of the present invention showing a building structure 1 without a stair placement section and a toilet placement section. Fig. 10B and 10C are plan configuration views showing a building structure 1 including a stair installation section and a toilet installation section according to another embodiment of the present invention. As shown in fig. 10A, the building structure 1 is divided into a plurality of regions a1, a2, A3, a4 in the first direction D1 at substantially the pitch of the precast beam-column structures 2. The toilet installation T and the stair installation S can be planned in a plurality of areas a1, a2, A3, a4, depending on the actual space allocation requirements. The toilet installation area T and the stair installation area S can be planned in the same area (for example, the area A1), or the toilet installation area T and the stair installation area S can be planned in different areas (for example, the toilet installation area T is planned in the area A1, and the stair installation area S is planned in the area A2). As shown in FIG. 10B, when the lavatory installation section T is planned in the outer area (e.g., area A1), the pillars 12 are installed at the corner positions of the stair installation section S. As shown in FIG. 10C, when the lavatory installation section T is planned in a non-outside area (e.g., area A2), the pillars 12 are provided at both corner positions of the stair installation section S.

Fig. 11A to 11G are schematic structural views of an internal structure of a building at different stages according to a third embodiment of the present invention, which includes the following steps.

Steps (a "), (b") and (c ") are substantially the same as steps (a), (b) and (c) of the previous embodiment, wherein step (a") further comprises providing a column 12 in the building structure 1. As shown in fig. 10B and 11B, the pillars 12 are disposed at the corners of the stair case section S of the building structure 1 at positions corresponding to the fourth precast beam column structures 204. In addition, step (a ") may be performed after step (b") or step (c ") as needed.

Step (e ″), as shown in fig. 10B and 11B, the upper short beam 42 is disposed at the first height h3 of the second floor of the building structure 1 on the other side of the stairway setting section S opposite to the lower short beam 41, and both ends of the upper short beam 42 are connected to the pillars 12 and the fourth precast beam-column structure 204, respectively. Step (f ") is substantially the same as step (f) of the previous embodiment.

Between step (e ") and step (f") there is further included the step (g "), as shown in fig. 10B and 11C, of providing a pre-cast floor structure 93 comprising a second pre-cast bathroom floor structure 32 at a first height h3 of a second level of the building structure 1 in a bathroom fixture area T of the second level, at a first height h3 of the second level being substantially at a floor location of the second level. The second pre-cast bathroom floor structure 32 is configured to pre-embed and configure bathroom plumbing. In other embodiments of the present invention, step (g ") may be performed after step (f"). Steps (h ") and (i") are substantially the same as steps (h) and (i) of the previously described embodiments.

In step (k ″), as shown in fig. 10B and 11D, the upper short beam 42 is disposed at the first height h5 of the third floor on the other side of the stairway setting section S opposite to the lower short beam 41, and both ends of the upper short beam 42 respectively connect the pillar 8 and the fourth precast beam-column structure 204. In addition, in the steps (e ") and (k"), a fourth joint member (not shown) having a plurality of seventh through holes is provided at a position where the pillar 12 corresponds to the fourth precast beam/column structure 204, and the connection manner of the upper short beam 42 and the first joint member 71 of the fourth precast beam/column structure 204 and the fourth joint member of the pillar 12 is substantially the same as the connection manner of the upper short beam 42 and the third joint member of the fourth precast beam/column structure 204 and the cross beam 5 of the foregoing embodiment. Step (l ") is substantially the same as step (l) of the previously described embodiment.

When the building structure 1 needs to be set up with bathrooms and stairs of more than two floors, steps (g ") to (l") are repeated at higher floors above the second floor until the highest floor is completed (as shown in fig. 11E). After the step (l ") is completed, further comprising the steps of:

step (m "), as shown in FIG. 11F, the area of the precast floor structure 93 on the second and upper floors beyond the precast lavatory floor structure 32 is poured with concrete 13 thereon. Step (n ") is substantially the same as step (n) of the previous embodiment (as shown in fig. 11G).

Please refer to fig. 11B, 11C and 12. FIG. 12 is a schematic structural view of a pre-cast floor structure 93 incorporating the second pre-cast bathroom floor structure 32 of the present invention. As shown in fig. 11B and 11C, a supporting member 83 is provided in advance at the second floor of the third precast beam casting structure 203 and the seventh precast beam casting structure 207 and at the first heights h3, h5 of the higher floors, and a supporting member (not shown) is provided in advance at the position where the upper short beam 42 corresponds to the supporting member 83 of the third precast beam casting structure 203 and the seventh precast beam casting structure 207, for supporting the precast floor structure 93 including the second precast bathroom floor structure 32. As shown in fig. 12, the bottom 931 of the precast floor structure 93 includes two parallel strip support structures 932 to enhance the structural strength of the precast floor structure 93. When the precast floor structure 39 is disposed in the toilet installation area T of the second floor and the higher floors above the second floor, the supporting members 83 of the third precast beam-column structure 203 and the seventh precast beam-column structure 207 support one side of the supporting structure 932 of the bottom portion 931 of the precast floor structure 93, and the supporting members of the upper short beam 42 support the other side of the supporting structure 932 of the bottom portion 931 of the precast floor structure 93.

The terms "a" or "an" are used herein to describe elements and components of the invention. This terminology is used for convenience in description only and is for the purpose of giving the basic idea of the invention. This description should be read to include one or at least one and the singular also includes the plural unless it is obvious that it is meant otherwise. The terms "a" and "an" when used in conjunction with the word "comprising" in the claims may mean one or more than one. Further, the term "or" is used herein to mean "and/or".

Unless otherwise specified, spatial descriptions such as "above," "below," "up," "left," "right," "down," "body," "base," "vertical," "horizontal," "side," "upper," "lower," "upper," "above," "below," and the like are directed to the directions shown in the figures. It is to be understood that the spatial descriptions used herein are for purposes of illustration only and that actual implementations of the structures described herein may be spatially configured in any relative orientation, such limitations not altering the advantages of the embodiments of the present invention. For example, in the description of some embodiments, an element provided "on" another element may encompass the case where the preceding element is directly on the succeeding element (e.g., in physical contact with the succeeding element), as well as the case where one or more intervening elements are located between the preceding and succeeding elements.

As used herein, the terms "substantially", "substantially" and "about" are used to describe and account for minor variations. When used in conjunction with an event or circumstance, these terms can mean that the event or circumstance occurs specifically, and that the event or circumstance closely approximates that which occurs.

The above-described embodiments are merely illustrative of the technical spirit and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and to implement the same, and all changes and modifications that are equivalent to the spirit of the present invention should be included in the scope of the present invention, when the scope of the present invention is not limited thereto.

Description of the symbols

1 building structure

2 precast beam column structure

5 Cross member

5' beam

10 fastener

11 fastener

12 support

13 concrete

21-column structure

22 Beam Structure

31 first precast bathroom floor structure

32 second precast bathroom floor structure

33 first toilet unit

34 second toilet unit

35 wall structure

36 support structure

361 outer steel beam

362 inner steel beam

37 sheet material

41 lower short beam

42 upper short beam

43 buckling convex part

51 upper wing plate

52 lower wing plate

53 Web

54 end portion

54' end portion

55' groove

56' bottom surface

57' form

58' hole

61 pre-cast stairs at lower part

62 pre-cast stairs on upper part

63 buckling concave part

64 abutting piece

71 first engaging member

72 second engaging member

72' second engaging member

81 support element

82 support member

83 supporting member

91 floor structure

92 steel bar structure

93 precast floor slab structure

201 first precast beam column structure

202 second precast beam column structure

203 third precast beam column structure

204 fourth precast beam column structure

205 fifth precast beam column structure

206 sixth precast beam column structure

207 seventh precast beam column structure

223 free end

224 beam rib

225 steel bar connector

226 stirrup

361 outer steel beam

362 inner steel beam

411 upper wing plate

412 lower wing plate

413 web

414 end of the tube

511 Top surface

511' top surface

512 shear force nail

611 end portion

612 end portion

711 end of the main shaft

712 perforation

721 end part

721' end part

722 through hole

931 bottom part

932 supporting structure

4141 perforation

4211 the top surface

Area A

Region A1

Region A2

Region A3

Region A4

Direction D1

L1 interval

L2 interval

S stair settling area

T-shaped bathroom installation area

Height H

h1 height

h2 height

h3 height

h4 height

h5 height

h6 height

h7 height

Claims

1. A construction method of an internal structure of a building, comprising the steps of:

(a) providing a first pre-cast bathroom floor structure at a first height of a first level of a building structure;

(b) arranging a lower short beam at a second height of the first floor to one side of a stair setting area, the second height of the first floor being higher than the first height of the first floor;

(c) connecting the end part of the lower precast stair with the lower short beam;

(d) providing a beam at a first height of a second storey above the first storey to span opposite sides of the building structure;

(e) arranging an upper short beam at the first height of the second floor on the other side of the stair placement area relative to the side, wherein the end of the upper short beam is connected with the cross beam; and

(f) connecting two end parts of the upper precast stair with the lower short beam and the upper short beam respectively, wherein the steps (b) to (f) are performed sequentially and the step (a) is performed before the step (d).

2. The method of claim 1, further comprising the steps of:

(g) disposing a second pre-cast bathroom floor structure at said first elevation of said second layer in said bathroom fixture area of said second layer;

(h) providing another lower short beam at a second height of the second level to one side of the landing area, the second height of the second level being higher than the first height of the second level;

(i) connecting two end parts of another lower precast stair with the other lower short beam and the upper short beam of the first layer respectively;

(j) providing another beam at a first height of a third level above the second level to span opposite sides of the building structure;

(k) the other side, opposite to the side, of the stair placement area, where another upper short beam is arranged at the first height of the third floor, and the end of the other upper short beam is connected with the other cross beam; and

(l) Connecting two end parts of another upper precast stair to the another lower short beam and the another upper short beam respectively,

wherein (h) - (l) are performed sequentially and step (g) is performed before step (j).

3. The method according to claim 2, wherein the lower precast stairway and the upper precast stairway are each provided with a latching recess at both ends thereof, the lower short beam and the upper short beam are each provided with a latching protrusion, or the lower precast stairway and the upper precast stairway are each provided with a latching protrusion at both ends thereof, the lower short beam and the upper short beam are each provided with a latching recess, and step (c), step (f), step (i) and step (l) are performed by latching the latching protrusions with the latching recesses.

4. The method of claim 2, wherein the building structure comprises a plurality of precast beam-column structures disposed at predetermined intervals, each of the plurality of precast beam-column structures comprising a column structure having a plurality of story heights and a beam structure having a length at the height of each story that is approximately half the length of the predetermined intervals,

in the step (b), two end parts of the lower short beam are respectively connected with a first precast beam column structure and a second precast beam column structure at two adjacent positions in the precast beam column structures;

in the step (d), two end parts of the cross beam are respectively connected with the second precast beam-column structure and a third precast beam-column structure opposite to the second precast beam-column structure;

in step (e), connecting two end parts of the upper short beam with a fourth precast beam column structure and the cross beam of the precast beam column structures respectively;

in the step (h), two end parts of the other lower short beam are respectively connected with the first precast beam-column structure and the second precast beam-column structure;

in step (j), connecting two end parts of the other beam with the second precast beam-column structure and the third precast beam-column structure respectively;

in step (k), connecting both ends of the other upper short beam to the fourth precast beam-column structure and the other cross beam, respectively.

5. The method according to claim 4, wherein the lower and upper short beams are steel beams, the two ends of the lower short beam are provided with a plurality of first through holes, the two ends of the upper short beam are provided with a plurality of second through holes, the first and second precast beam column structures are provided with a first joint member having a plurality of third through holes at a second height of each floor and the fourth precast beam column structure is provided with a second joint member having a plurality of fourth through holes at a first height of the second floor, the cross beam is provided with a third joint member having a plurality of fifth through holes at a position corresponding to the fourth precast beam column structure, the two ends of the cross beam are provided with a plurality of sixth through holes, and a plurality of first fasteners are respectively inserted through the plurality of first through holes of the lower short beam and the first joint members of the first and second precast beam column structures The third plurality of holes of the member are formed to perform steps (b) and (h), the second plurality of holes of the upper short beam and the third plurality of holes of the first coupling member of the fourth precast beam and column structure and the fifth plurality of holes of the third coupling member of the cross beam are formed to perform steps (e) and (k), respectively, another first plurality of fasteners are formed to pass through the sixth plurality of holes of the cross beam and the fourth plurality of holes of the second coupling member of the second and third precast beam and column structures, respectively, to perform steps (d) and (j).

6. The method of claim 4, wherein the ends of the beam have grooves, and steps (d) and (j) are performed by engaging second engagement members of the second and third precast beam-column structures with the grooves of the beam.

7. The method of claim 4, wherein a fifth precast beam column structure and a sixth precast beam column structure of the plurality of precast beam column structures are pre-provided with a first support member and a second support member at the cross beam, such that in step (g) the first support member supports a bottom side of the second precast bathroom floor structure and the second support member supports a bottom side of the second precast bathroom floor structure.

8. The method defined in any one of claims 2 to 7 wherein step (g) includes providing the second pre-cast bathroom floor structure in a part of the lavatory installation and providing a floor structure in a remainder of the lavatory installation;

further comprising, after step (l), the step (m) of laying a staggered reinforcing structure on the floor structure and placing concrete thereon, and the step (n) of constructing the first and second pre-cast bathroom floor structures into a wall structure and assembling an interior structure of a bathroom to form the first and second bathroom units.

9. A construction method of an internal structure of a building, comprising the steps of:

(a') hoisting a first toilet unit pre-configured with a wall structure and an interior structure to a first floor of a building structure;

(b') providing a lower stub at a second height of the first level to one side of a landing zone, the second height of the first level being higher than the first height of the first level;

(c') connecting one end of the lower precast stairway with the lower short beam;

(d') providing a beam at a first height of a second storey above the first storey to span opposite sides of the building structure;

(e') providing an upper short beam at the first height of the second floor on the other side of the landing zone relative to the side, the end of the upper short beam connecting the cross beam; and

(f ') connecting both ends of the upper precast stairway to the lower short beam and the upper short beam, respectively, wherein steps (b ') - (f ') are sequentially performed and step (a ') is performed before step (d ').

10. The method of claim 9, further comprising the steps of:

(g') hoisting a second toilet unit pre-configured with a wall structure and an interior structure to a toilet installation area of said second floor of said building structure;

(h') providing another lower stringer at a second elevation of said second level to one side of said landing zone, said second elevation of said second level being higher than said first elevation of said second level;

(i') connecting the two end parts of another lower precast stair with the other lower short beam and the upper short beam of the first floor respectively;

(j') providing another beam at a first height of a third level above the second level to span opposite sides of the building structure;

(k') providing another upper short beam at the other side of the stair well area from the side at the first height of the third floor, the other upper short beam having an end connected to the other cross beam; and

(l') connecting the two ends of another upper precast stair to the another lower short beam and the another upper short beam respectively.

11. The method according to claim 10, wherein the lower precast stairway and the upper precast stairway are provided with engaging recesses at both ends thereof, the lower short beam and the upper short beam are provided with engaging protrusions at both ends thereof, or the lower precast stairway and the upper precast stairway are provided with engaging protrusions at both ends thereof, the lower short beam and the upper short beam are provided with engaging recesses at both ends thereof, and the step (c '), the step (f'), the step (i ') and the step (l') are performed by engaging the engaging protrusions with the engaging recesses.

12. The method of claim 10, wherein the building structure comprises a plurality of precast beam-column structures disposed at predetermined intervals, each of the plurality of precast beam-column structures comprising a column structure having a plurality of story heights and a beam structure having a length at the height of each story that is approximately half the length of the predetermined intervals,

in the step (b'), connecting two end parts of the lower short beam with a first precast beam column structure and a second precast beam column structure at two adjacent positions in the precast beam column structures respectively;

in step (d'), connecting the two ends of the cross beam to the second precast beam-column structure and a third precast beam-column structure opposite to the second precast beam-column structure, respectively;

connecting both end portions of the upper short beam to a fourth precast beam-column structure of the plurality of precast beam-column structures and the cross beam, respectively, in step (e');

connecting both end portions of the other lower short beam to the first precast beam-column structure and the second precast beam-column structure, respectively, in step (h');

(ii) connecting the two ends of the further beam to the second and third precast beam-column structures of the plurality of precast beam-column structures, respectively, in step (j');

in step (k'), connecting both ends of the other upper short beam to the fourth precast beam-column structure and the other cross beam, respectively.

13. The method as claimed in claim 12, wherein the lower and upper joists are steel beams, the two ends of the lower joists are provided with a plurality of first through holes, the two ends of the upper joists are provided with a plurality of second through holes, the first and second precast beam-column structures are provided with a first joint member having a plurality of third through holes at a second height of each floor and the fourth precast beam-column structure is provided with a second joint member having a plurality of fourth through holes at a first height of the second floor, the cross beam is provided with a third joint member having a plurality of fifth through holes at a position corresponding to the fourth precast beam-column structure, the two ends of the cross beam are provided with a plurality of sixth through holes, and a plurality of first fasteners are respectively inserted through the plurality of first through holes of the lower joists and the first joint members of the first and second precast beam-column structures Performing steps (b ') and (h') by passing another plurality of first fasteners through the plurality of second through holes of the upper stub beam and the plurality of third through holes of the first coupling member of the fourth precast beam column structure and the plurality of fifth through holes of the third coupling member of the cross beam, respectively, performing steps (e ') and (k') by passing a plurality of second fasteners through the plurality of sixth through holes of the cross beam and the plurality of fourth through holes of the second coupling member of the second and third precast beam column structures, respectively, to perform steps (d ') and (j').

14. The method of claim 12, wherein the ends of the beam have grooves, and steps (d ') and (j') are performed by engaging second engagement members of the second and third precast beam-column structures with the grooves of the beam.

15. The method of claim 12, wherein a fifth and sixth of the plurality of precast beam-column structures are pre-provided with a first support member, and a second support member is pre-provided with the cross beam, such that in step (g'), the first support member supports a bottom side of the second toilet unit, and the second support member supports a bottom side of the second toilet unit.

16. The method according to any one of claims 10 to 15, wherein step (g') includes providing the second toilet unit in a partial region of the toilet seat and providing a floor structure in a remaining region of the toilet seat;

further comprising a step (m ') of laying a reinforcing bar structure in a staggered configuration on the floor structure and placing concrete thereon after the step (l').

17. A construction method of an internal structure of a building, comprising the steps of:

(a ") providing a first pre-cast bathroom floor structure at a first elevation on a first level of a building structure, and providing a column in said building structure;

(b ") providing a lower stringer to one side of a landing zone at a second elevation of the first level, the second elevation of the first level being higher than the first elevation of the first level;

(c ") connecting the end of the lower precast stairway to the lower short beam;

(e ") providing an upper short beam at a first height of the second level to the other side of the landing zone relative to the side, the upper short beam having an end connected to the post; and

(f ") connecting the two ends of the upper precast stairway to the lower short beam and the upper short beam, respectively, wherein steps (b") - (f ") are performed sequentially and step (a") is performed before step (e ").

18. The method according to claim 17, further comprising, between steps (e ") and (f"), the step (g ") of providing a pre-cast floor structure comprising a second pre-cast toilet floor structure at the first elevation of the second layer to a toilet seat of the second layer, further comprising, after step (f"), the steps of:

(h ") providing another lower stringer to one side of the landing zone at a second elevation of the second level, the second elevation of the second level being higher than the first elevation of the second level;

(i ") connecting the two ends of another lower precast stairway to the another lower short beam and the upper short beam of the first floor, respectively;

(k ") providing another upper short beam at the other side of the landing zone at the first level of the third level, the other upper short beam having an end connected to the post; and

(l ") connecting the two ends of another upper precast stair to the another lower short beam and the another upper short beam respectively.

19. The method according to claim 18, wherein the lower precast stairway and the upper precast stairway are each provided with engaging recesses at both ends thereof, the lower short beam and the upper short beam are each provided with engaging protrusions, or the lower precast stairway and the upper precast stairway are each provided with engaging protrusions at both ends thereof, the lower short beam and the upper short beam are each provided with engaging recesses, and step (c "), step (f"), step (i ") and step (l") are performed by engaging the engaging protrusions with the engaging recesses.

20. The method of claim 18, wherein the building structure comprises a plurality of precast beam-column structures disposed at predetermined intervals, each of the plurality of precast beam-column structures comprising a column structure having a plurality of story heights and a beam structure having a length at the height of each story that is substantially half the length of the predetermined intervals;

in the step (b ″), connecting two end parts of the lower short beam with a first precast beam-column structure and a second precast beam-column structure at two adjacent positions in the plurality of precast beam-column structures respectively;

connecting both end portions of the upper short beam to the fourth precast beam column structure and the pillar of the plurality of precast beam column structures, respectively, in step (e ");

connecting both end portions of the other lower short beam to the first precast beam-column structure and the second precast beam-column structure, respectively, in step (h ");

in step (k ″), both ends of the other upper short beam are connected to the fourth precast beam-column structure and the pillar, respectively.

21. The method as claimed in claim 20, wherein the lower and upper joists are steel beams, the two ends of the lower joists are provided with a plurality of first through holes, the two ends of the upper joists are provided with a plurality of second through holes, the first and second precast beam-column structures are provided with a first coupling member having a plurality of third through holes at a second level of each floor and the fourth precast beam-column structure is provided with a first coupling member having a plurality of seventh through holes at a first level of a second floor, the pillars are provided with a fourth coupling member having a plurality of seventh through holes corresponding to the fourth precast beam-column structure, and steps (b ") and (h") are performed by respectively passing a plurality of first fasteners through the plurality of first through holes of the lower joists and the plurality of third through holes of the first coupling member of the first and second precast beam-column structures, and by respectively passing another plurality of first fasteners through the plurality of second through holes of the upper joists and the plurality of second through holes of first and the second through holes of the upper joists The plurality of third through holes of the first joining member of the fourth precast beam-column structure and the plurality of seventh through holes of the fourth joining member of the pillar are formed to perform step (e ") and step (k").

22. A method according to claim 20, wherein the upper short beam is pre-provided with a third bearing member and a fourth bearing member is pre-provided at the third precast beam column structure and a seventh precast beam column structure adjacent to the third precast beam column structure, such that in step (g ") the third bearing member bears a bottom side of the second precast floor slab structure and the fourth bearing member bears a bottom other side of the second precast floor slab structure.

23. The method according to any one of claims 18 to 22, wherein step (l ") is followed by a step (m") of concreting over the second pre-cast floor structure in areas other than the second pre-cast commode floor structure, and a step (n ") of constructing wall structures and assembling commode interior structures of the first and second pre-cast commode floor structures to form first and second commode units.