Existing residence flat-layer home-entry low-influence elevator adding structure and method

Abstract

The invention discloses an existing residence flat-layer home-entry low-influence added elevator structure and method.The added elevator structure is arranged on the side, opposite to a staircase, of an existing main body structure and comprises an elevator hoistway arranged within the width range of an external longitudinal window wall between two buildings of the existing main body structure and reliably connected with the existing main body structure; the elevator front rooms are arranged on the side, away from the existing main body structure, of the elevator hoistway, emergency rescue manholes are formed in a floor slab of each layer of the elevator front room and a roof of the uppermost layer of the elevator front room, and crawling ladders are arranged at the emergency rescue manholes; and the external expansion rooms are formed by outward expansion of living rooms or living rooms of adjacent buildings of two houses of the existing main body structure, and the external expansion room on each floor is communicated with the elevator front room on each floor through an entrance door. The elevator shaft is arranged on the opposite side of the staircase and in the outdoor space within the width range of the wall between the two windows, the elevator front room and the living room are expanded outwards, barrier-free travel is achieved, and the living environment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of installing elevators, and in particular to a low-impact elevator structure and method for installing elevators on existing residential floors. Background Art

[0003] Existing masonry unit-type residential buildings generally have one elevator for three households or one elevator for two households. The commonly used solution for adding an additional elevator is to add an elevator shaft outside the stairwell entrance, share an entrance and exit with the stairwell, and connect the elevator vestibule to the rest platform of each floor with the same elevation. The design and construction are easy to implement, and are applicable to both one elevator for three households and one elevator for two households. However, the residents need to walk half a floor, which is extremely inconvenient for the elderly and disabled.

[0004] See also Figure 1 and Figure 2 The existing plan for adding elevators to flat-floor households is to add an elevator shaft outside the stairwell entrance when there is a layout of one elevator and two units in an existing masonry-structured unit-type residential building. The elevator shaft shares an entrance and exit with the stairwell, and the elevator vestibule has the same elevation as each floor. The elevator vestibule is connected to the interior through a corridor, and the design and construction are easy to implement. However, this plan is only applicable to the flat surface of one elevator and two households, and is not applicable to the flat surface of one elevator and three households. In addition, for the layout of kitchens and bathrooms on both sides of the stairwell, the length of the corridor needs to be extended, which increases the cost and affects the privacy of the residents. In particular, the residents on the ground floor have no sense of gain, and it is difficult to promote it.

[0005] The existing Chinese invention patent application with application number 202210918477.2 discloses a flat-floor entrance elevator building structure with a rescue passage and a rescue method, including a building, an elevator and a corridor; a rooftop is provided on the top of the building, and the building is provided with multi-layer spaces from top to bottom, and each floor space is provided with a staircase public area, a living area and an elevator public area, and the living area is provided with a front entrance door and a rear entrance door, and the living area is connected to the staircase public area through the front entrance door, and the living area is connected to the elevator public area through the rear entrance door, and a rescue entrance and exit are provided on the side wall of the building, and the rescue entrance and exit connect the outside of the building with the elevator public area of ​​the topmost space of the building; an upward-extending staircase is provided on one side of the building, and the staircase is connected to each The stairs public area on the first floor, the top of the stairs is connected to the rooftop; the elevator is a top-mounted machine room elevator, with a machine room and a maintenance entrance and exit connected to the machine room at the top of the elevator, a main entrance and exit for entering and exiting the elevator at the bottom of the elevator, and a plurality of branch entrances and exits between the main entrance and exit and the machine room from top to bottom; the elevator is installed on the side of the outside of the building adjacent to the elevator public area, the elevator machine room extends out over the top of the rooftop, the branch entrances and exits of the elevator correspond one-to-one with the spaces on each floor of the building, and are respectively connected to the elevator public areas in the spaces on their floors; the corridor is coiled and fixedly installed on the outside of the elevator, its lower end is connected to the rescue entrance and exit, and its upper end is connected to the rooftop; the corridor includes a first staircase section, a horizontal plank road section, and a second staircase section, which are connected in sequence from bottom to top. This plan connects the living area with the elevator public area through the rear entrance door, which has the problem of affecting the privacy of residents due to the entry on the same floor; at the same time, installing an elevator on the south side blocks the lighting of the building itself, causing lighting problems; in addition, there are stairs outside the elevator shaft. During an earthquake, a large number of stairs will be damaged, especially the entire external stairs will fall off, which should be given sufficient attention.

[0006] The existing solution has the following problems: 1. Install an elevator on the north side of the building. The existing plan for adding elevators to the flat floor is only applicable to the plane of one elevator and two households, and cannot be applied to the plane of three households. In addition, if there are kitchens and bathrooms on both sides of the stairwell, the length of the corridor needs to be extended, which increases the cost and affects the privacy of the residents. In particular, the residents on the ground floor have no sense of gain, which makes it difficult to promote. There are also problems of blocking and affecting the lighting of the adjacent buildings on the north side. 2. Installing an elevator on the south side of the building will address the applicability issues of one elevator serving three households, or even multiple households; the problem of obstruction to the building's own lighting; the problem of unobstructed emergency rescue channels in the event of abnormal elevator operation, stuck tracks, or passengers trapped in the elevator; the need to resolve the issue of the impact of the flat-floor entry solution on residents' privacy; the problem of affecting the lighting in the elevator vestibule, and the significant changes in the residential building's facade, resulting in poor visual effects. Summary of the invention

[0007] The present invention provides a low-impact elevator installation structure and method for existing residential flat-floor access.

[0008] The technical problems to be solved are: the need to solve the problem of unobstructed emergency rescue channels in situations such as abnormal elevator operation, stuck tracks, and passengers trapped in elevators; the need to solve the problem of the impact of the flat-floor entry plan on residents' privacy; the need to solve the problem of adding an elevator on the north side, which will block the lighting of the adjacent buildings on the north side; the need to solve the problem of adding an elevator on the south side, which will block the lighting of the building itself.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention discloses a low-impact elevator structure for adding to existing residential flats. The elevator structure is arranged on a side opposite to the stairwell of the existing main structure, and comprises: The elevator shaft is set within the width of the external longitudinal window wall between two buildings of the existing main structure and is reliably connected to the existing main structure; The elevator vestibule is arranged on the side of the elevator shaft away from the existing main structure, and an emergency rescue manhole is arranged on the floor slab of each elevator vestibule and the roof of the top elevator vestibule, and a ladder is arranged at the emergency rescue manhole; The external expansion room is formed by expanding the living room or parlor of two adjacent buildings with an existing main structure outward. The external expansion room on each floor is connected to the elevator vestibule on each floor through an entrance door.

[0010] The present invention provides a low-impact elevator structure for installing elevators at the entrance of existing residential floors. Furthermore, the elevator shaft, the elevator vestibule and the external expansion room are cast-in-place reinforced concrete structures.

[0011] The present invention provides a low-impact elevator structure for entering existing residential buildings on the same floor. Furthermore, the emergency rescue manholes are staggered on each floor, and a cover plate is installed at the emergency rescue manhole; the ladder is a retractable folding ladder, and the ladder is installed on the bottom surface of the cover plate and can be retracted on the bottom surface of the cover plate.

[0012] The present invention provides a low-impact elevator structure for entering existing residential floors. Furthermore, a sprayed reinforced concrete slab wall is provided on the outer wall of the existing main structure, and the elevator shaft and the outward expansion room are reliably connected to the existing main structure through embedded reinforcement and the sprayed concrete slab wall.

[0013] The present invention provides a low-impact elevator structure for installing elevators at the entrance of existing residential floors. Furthermore, the foundations under the elevator shaft, the elevator vestibule and the external expansion room adopt pile foundations or raft foundations.

[0014] The present invention provides a low-impact elevator structure for installing elevators at the level of existing residential buildings. Furthermore, the foundation is reinforced by using tree root pile technology.

[0015] The present invention provides a low-impact elevator structure for existing residential flat-floor entrances, further comprising a barrier-free ramp and steps, wherein the barrier-free ramp and steps are connected to a first-floor elevator vestibule.

[0016] The present invention provides a low-impact elevator structure for existing residential flats. Furthermore, for the situation of one elevator for three or more households, the whole building is equipped with elevators according to the principle of "adjacent households are combined in pairs", that is, 1 and 2 households in one unit are combined, 3 households in one unit and 1 household in the second unit are combined, and so on.

[0017] The present invention provides a low-impact elevator structure for flat-floor entrances in an existing residential building. Furthermore, the elevator structure is applied to one side of a stairwell in an existing main structure. For a situation where one elevator serves three or more households, the entire building is equipped with elevators according to the principle of "adjacent households are combined in pairs", that is, a combination of 1 and 2 households in one unit, or a combination of 3 households in one unit and 1 household in two units.

[0018] The present invention provides a low-impact elevator structure for existing residential flat-floor entrances, further comprising: The present invention provides a construction method, comprising the following steps: Step 1: Use tree root piles to reinforce the foundation of the expanded area; Step 2: Use sprayed reinforced concrete slab walls to reinforce the exterior walls of the existing main structure expansion part, and connect the walls and floor slabs of the elevator shaft, elevator vestibule, and external expansion room to be constructed with the wall reinforcement steel bars of the existing main structure to form a reliable connection, and then proceed with the construction of the elevator shaft, elevator vestibule, and external expansion room; Step 3: Before pouring the floor slabs of each floor, emergency rescue manholes are staggered on the floor slabs of the elevator vestibules of each floor. When pouring to the top of the elevator structure, emergency rescue manholes are reserved on the roof of the elevator vestibule; Step 4: Install ladders and covers at the inspection manhole and rescue manhole; Step 5: Remove the wall under the window of the original house connected to the expanded room to achieve connectivity with the expanded house; Step 6: Install the elevator and enclosure structure in the elevator shaft, and carry out interior and exterior decoration of the expanded building; Step 7: Construct barrier-free ramps, steps and canopies on the first floor.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. This application solves the problem of blocking and affecting the lighting of the adjacent buildings on the north side by installing the additional elevator on the side opposite to the stairwell of the existing main structure, compared with the traditional installation of the additional elevator on one side of the stairwell; the elevator shaft is installed using the width of the outer longitudinal wall between the two buildings of the existing main structure, and the house and the elevator lobby are expanded outward, so as to achieve the purpose of flat-floor entry and expand the building area at the same time. There is no need for turnover during the construction period, and the impact on the residents is small; in addition, the sense of gain of the residents on the ground floor is increased, which is conducive to the promotion of installing elevators in existing buildings; 2. The elevator shaft is set close to the wall of the existing main structure, and the sprayed reinforced concrete slab wall is set on the wall of the expansion part for reinforcement. The walls and floor slabs of the elevator shaft, elevator vestibule, and external expansion room are connected with the wall reinforcement steel bars of the existing main structure to achieve reliable connection between the elevator shaft and external expansion room and the existing main structure. The new concrete structure is used to improve the seismic bearing capacity of the existing main structure. At the same time, the sprayed reinforced concrete slab wall is used to reinforce the external wall to increase the integrity of the elevator structure and the existing main structure, avoiding the collision between the new and old structures and increasing the burden on the original structure; 3. For the situation of three or more households per elevator, this application breaks the inherent concept that residents in the same unit share one elevator, and installs elevators in the whole building according to the principle of "adjacent households in pairs", that is, 1 and 2 households in one unit are combined, 3 households in one unit and 1 household in the second unit are combined, so that the elevator can be used conveniently without affecting the privacy and ventilation and lighting requirements of the residence; 4. In the event of emergency rescue, the rescue personnel use the original unit roof inspection manhole to go up to the roof, go down to the interior of the top elevator vestibule through the emergency rescue manhole set up in the elevator vestibule, and reach the floor in need of rescue through the emergency rescue manholes and ladders set up on each floor of the elevator vestibule to achieve emergency rescue; the inspection manhole and emergency rescue manhole are usually in a locked state to prevent unauthorized personnel from reaching the roof and causing safety problems; the emergency rescue manholes on the elevator vestibule are staggered, and during emergency rescue, the rescue personnel open the cover, and the ladder under the cover automatically extends to the lower floor to achieve vertical passage, and when the cover is closed, the ladder automatically folds and is stored under the cover without affecting the normal use of the elevator; emergency rescue manholes are staggered in different parts of different floor plans to avoid accidents in which people fall continuously from multiple floors when using ladders due to panic in an emergency, thereby further ensuring personal safety.

[0020] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the first floor plan structure of the present invention where an elevator is installed for two households per elevator; Figure 2 This is a schematic diagram of the plan structure of a standard floor with one elevator for two households according to the present invention; Figure 3 This is a schematic diagram of the plan structure of a standard floor with one elevator for three households according to the present invention; Figure 4 This is a cross-sectional view of the existing main structure of the present invention after installing an elevator; Figure 5 This is a schematic diagram of the installation structure of the internal ladder of the elevator installed in the present invention; Figure 6 This is a schematic diagram of the staggered distribution of the internal ladders of the elevator installed in the present invention.

[0022] Reference numerals: 1. Existing main structure; 2. Stairwell; 3. Elevator shaft; 4. Elevator vestibule; 5. External expansion room; 6. Barrier-free ramp; 7. Stairs; 8. External longitudinal window wall; 9. Floor; 10. Emergency rescue manhole; 11. Maintenance manhole; 12. Ladder; 13. Entrance door. DETAILED DESCRIPTION

[0023] like Figure 1-Figure 6 As shown, the present invention discloses a low-impact elevator installation structure and method for existing residential flat-floor entrances.

[0024] Embodiment 1: For an existing main structure 1 with one elevator for two households, an additional elevator structure is arranged on the opposite side of the stairwell 2 of the existing main structure 1.

[0025] The added elevator structure includes an elevator shaft 3, an elevator vestibule 4, an external expansion room 5, a barrier-free ramp 6 and steps 7. The elevator shaft 3, the elevator vestibule 4 and the external expansion room 5 are cast-in-place reinforced concrete structures. The elevator shaft 3 is arranged within the width of the external longitudinal window wall 8 between the two buildings of the existing main structure 1 and is arranged close to the wall of the existing main structure 1, and the elevator shaft 3 is reliably connected to the existing main structure 1.

[0026] The elevator vestibule 4 is arranged on the side of the elevator shaft 3 away from the existing main structure 1. An emergency rescue manhole 10 is opened on the floor slab 9 of the elevator vestibule 4 on each floor, and an emergency rescue manhole 10 is provided on the roof of the elevator vestibule 4 on the top floor. A cover plate is installed at the emergency rescue manhole 10, and a ladder 12 is installed under the cover plate. The ladder 12 uses a retractable folding ladder 12, which is an existing folding ladder 12 product and will not be described in detail in this application. The retractable folding ladder 12 can be stored on the bottom surface of the cover plate.

[0027] The outward expansion room 5 is formed by expanding the living room or the living room of two adjacent buildings of the existing main structure 1 outward. The outward expansion room 5 on each floor is connected to the elevator vestibule 4 on each floor through the entrance door 13.

[0028] The barrier-free ramp 6 and steps 7 are arranged on the first floor of the additional elevator and are connected to the elevator vestibule 4 to achieve the purpose of entering and exiting the additional elevator.

[0029] In this application, an elevator shaft 3 is added on the side opposite to the stairwell 2 of the existing main structure 1, using the width of the outer longitudinal wall between two households, and the rooms and elevator vestibule 4 are expanded outwards, so as to achieve the purpose of entering the households on the same floor, while expanding the building area of ​​the residents. No turnover is required during the construction period, and the impact on the residents is relatively small.

[0030] In an emergency rescue situation, the rescue personnel use the original unit roof maintenance manhole 11 to go up to the roof, go down to the top floor elevator vestibule 4 through the emergency rescue manhole 10 provided in the elevator vestibule 4, and reach the floor in need of rescue through the emergency rescue manhole 10 and ladder 12 provided on each floor of the elevator vestibule 4 to achieve emergency rescue; the emergency rescue manhole 10 is usually in a locked state to prevent unauthorized personnel from reaching the roof and causing safety problems.

[0031] The emergency rescue manholes 10 on the elevator vestibule 4 are staggered. During emergency rescue, the rescue personnel open the cover, and the ladder 12 under the cover automatically extends to the lower layer to realize vertical passage. When the cover is closed, the ladder 12 is automatically folded and stored under the cover without affecting the normal use of the elevator. The emergency rescue manholes 10 are staggered at different parts of different floor plans to avoid accidents caused by people falling from multiple floors continuously when using the ladder 12 due to panic in an emergency, thereby further ensuring personal safety.

[0032] A sprayed reinforced concrete slab wall is provided on the outer wall of the existing main structure 1, and the walls and floor slabs 9 of the elevator shaft 3, the elevator vestibule 4 and the external expansion room 5 are connected to the wall reinforcement steel bars of the existing main structure 1. The reinforcement steel bars are the reinforcement steel bars of the sprayed reinforced concrete slab wall and the embedded steel bars in the outer wall, so as to realize a reliable connection between the elevator shaft 3 and the external expansion room 5 and the existing main structure 1.

[0033] Compared with the current conventional elevator installation project, which generally adopts the solution of setting a steel frame on one side of the stairwell 2, it is divided into two modes: connection and disconnection. When the elevator frame is connected to the original main structure, there are generally problems such as uneven settlement, increased load on the original structure, and incoordination of deformation between the masonry structure and the steel structure during an earthquake; when the elevator frame is disconnected from the original main structure, there is generally a problem of a single-span frame, that is, the seismic interlayer deformation of the single-span frame is large, and there is a problem of collision with the masonry structure during an earthquake. If the deformation joint is too wide, it will cause difficulties in handling the waterproof structure of the floor 9.

[0034] In response to the above-mentioned problems, the present application provides an integrated solution for installing an elevator in the cast-in-place concrete structure of the external expansion building, wherein the newly added concrete structure is used to bear its own vertical load and is reliably connected to the existing main structure 1, and the newly added concrete structure is used to improve the seismic bearing capacity of the existing main structure 1. At the same time, the outer wall is reinforced with sprayed reinforced concrete slab walls to increase the integrity of the elevator structure and the existing main structure 1, thereby avoiding the problem of collision between the new and old structures and increasing the burden on the original structure.

[0035] Since the existing main structure 1 has been used for many years and the foundation settlement is basically stable, there may be a problem of uneven settlement between the expanded part and the existing main structure 1. In this application, pile foundations or raft foundations are used for the foundations under the expanded parts such as the elevator shaft 3, the elevator vestibule 4 and the external expansion room 5. Since the site of the old community is relatively small, large drilling rigs cannot be used for construction, and manhole bored piles are more risky, the foundation is reinforced by using tree root piles or micro piles, which can not only ensure the safety of the foundation but also facilitate construction.

[0036] Embodiment 2: The difference from the first embodiment is that, for the situation of one elevator for three or more households, if the elevator plan is still confined to the concept of "unit", when an elevator is added on one side of the stairs, the middle residents cannot use it, and when an elevator is added on the opposite side of the stairwell 2, the disadvantage of a corridor is bound to appear. Therefore, this application breaks the inherent concept that residents in the same unit share one elevator, and sets up and installs elevators in the entire building according to the principle of "adjacent residents in pairs", that is, 1 and 2 households in one unit are combined, and 3 households in one unit and 1 household in the second unit are combined. In this way, the elevator can be used conveniently without affecting the privacy and ventilation and lighting requirements of the residence.

[0037] Embodiment three: The difference from Example 1 and Example 2 is that the above-mentioned elevator structure is applied to the side of the existing main structure 1 where the stairwell 2 is set. For the situation of three or more households in one building, the whole building is equipped with elevators according to the principle of "adjacent households are combined in pairs", that is, households 1 and 2 in one unit are combined, households 3 in one unit and household 1 in the second unit are combined, and so on.

[0038] Embodiment 4: The construction method comprises the following steps: Step 1: Use tree root piles to reinforce the foundation of the expanded area.

[0039] Step 2: Use sprayed reinforced concrete slab walls to reinforce the exterior walls of the expanded part of the existing main structure 1, and connect the walls and floor slabs 9 of the elevator shaft 3, elevator vestibule 4, and external expansion room 5 to be constructed with the wall reinforcement steel bars of the existing main structure 1 to form a reliable connection, and then construct the elevator shaft 3, elevator vestibule 4, and external expansion room 5.

[0040] Step 3: Before pouring the floor slabs 9 of each floor, emergency rescue manholes 10 are staggered on the floor slabs 9 of the elevator vestibule 4 of each floor. When pouring to the top of the elevator structure, emergency rescue manholes 10 are reserved on the roof of the elevator vestibule 4.

[0041] Step 4: Install the ladder 12 and the cover plate at the emergency rescue manhole 10.

[0042] Step 5: Remove the wall under the window of the original house connected to the expanded room to achieve connectivity with the expanded house.

[0043] Step 6: Install the elevator and enclosure structure in the elevator shaft 3, and carry out interior and exterior decoration of the expanded building.

[0044] Step 7: Construct barrier-free ramp 6, steps 7 and canopy on the first floor.

[0045] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A low-impact elevator structure for existing residential flats, characterized by: The additional elevator structure is arranged on a side of the existing main structure (1) opposite to the stairwell (2), and comprises: The elevator shaft (3) is arranged within the width of the external longitudinal window wall (8) between two buildings of the existing main structure (1) and is reliably connected to the existing main structure (1); An elevator vestibule (4) is arranged on a side of the elevator shaft (3) away from the existing main structure (1), and an emergency rescue manhole (10) is provided on the floor slab (9) of each elevator vestibule (4) and the roof of the uppermost elevator vestibule (4), and a ladder (12) is provided at the emergency rescue manhole (10); The external expansion room (5) is formed by expanding the living room or parlor of two adjacent buildings of the existing main structure (1) outwards. The external expansion room (5) on each floor is connected to the elevator vestibule (4) on each floor through an entrance door (13).

2. According to claim 1, a low-impact elevator structure for existing residential flats is characterized by: The elevator shaft (3), the elevator vestibule (4) and the external expansion room (5) are cast-in-place reinforced concrete structures.

3. According to claim 1, a low-impact elevator structure for existing residential flats is characterized by: The emergency rescue manholes (10) are arranged alternately on each floor, and a cover plate is installed at the emergency rescue manholes (10); the ladder (12) is a retractable folding ladder, and the ladder (12) is installed on the bottom surface of the cover plate and can be retracted on the bottom surface of the cover plate.

4. According to claim 1, a low-impact elevator structure for existing residential flats is characterized by: The outer wall of the existing main structure (1) is provided with a sprayed reinforced concrete slab wall, and the elevator shaft (3) and the external expansion room (5) are reliably connected to the existing main structure (1) through embedded reinforcement and the sprayed concrete slab wall.

5. According to claim 1, a low-impact elevator structure for existing residential flats is characterized by: The foundations under the elevator shaft (3), the elevator vestibule (4) and the external expansion room (5) are pile foundations or raft foundations.

6. According to claim 5, a low-impact elevator structure for existing residential flats is characterized by: The foundation is reinforced by using tree root pile technology.

7. The low-impact elevator installation structure for existing residential flats according to claim 1 is characterized by: It also comprises a barrier-free ramp (6) and steps (7), wherein the barrier-free ramp (6) and steps (7) are connected to a first-floor elevator vestibule (4).

8. The low-impact elevator installation structure for existing residential flats according to claim 1 is characterized by: For situations where there are three or more households per elevator, the entire building will be equipped with elevators according to the principle of "adjacent households in pairs", that is, households 1 and 2 in unit one, households 3 in unit one and household 1 in unit two, and so on.

9. A low-impact elevator structure for existing residential flats according to any one of claims 1 to 8, characterized in that: The above-mentioned additional elevator structure is applied to the side of the existing main structure (1) where the stairwell (2) is set. For the situation where there are three or more households per staircase, the entire building is equipped with additional elevators according to the principle of "adjacent households are combined in pairs", that is, 1 and 2 households in one unit are combined, and 3 households in one unit and 1 household in the second unit are combined.

10. A construction method, comprising the low-impact elevator installation structure for existing residential flats as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Use tree root piles to reinforce the foundation of the expanded area; Step 2: Use sprayed reinforced concrete slab walls to reinforce the exterior walls of the expansion area of ​​the existing main structure (1), and connect the walls and floor slabs (9) of the elevator shaft (3), elevator vestibule (4), and external expansion room (5) to be constructed with the wall reinforcement steel bars of the existing main structure (1) to form a reliable connection, and then proceed with the construction of the elevator shaft (3), elevator vestibule (4), and external expansion room (5); Step 3: Before pouring the floor slabs (9) of each floor, emergency rescue manholes (10) are alternately reserved on the floor slabs (9) of the elevator vestibules (4) of each floor. When pouring to the top of the elevator structure, emergency rescue manholes (10) are reserved on the roof of the elevator vestibule (4); Step 4: Install a ladder (12) and a cover plate at the emergency rescue manhole (10); Step 5: Remove the wall under the window of the original house connected to the expanded room to achieve connectivity with the expanded house; Step 6: Install the elevator and enclosure structure in the elevator shaft (3) and carry out interior and exterior decoration of the expanded building; Step 7: Construct barrier-free ramp (6), steps (7) and canopy on the first floor.

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