Foundation structure of back-loading elevator

Abstract

The utility model provides an after-loading elevator foundation structure which comprises a bottom plate and side walls arranged above the bottom plate, the side walls and the bottom plate are connected to form a rectangular cavity structure with an opening in the top, a supporting column is arranged in the connecting position of every two adjacent side walls, the lower portion of each supporting column is arranged in the bottom plate, a reserved cavity is further formed in the bottom plate, and the reserved cavity is communicated with the bottom plate. And the reserved cavity is used for cast-in-place concrete. According to the structure, primary prefabrication of components on the periphery and at the bottom in the elevator foundation structure is completed in a factory, secondary pouring of a reserved cavity in the elevator foundation structure is completed during site construction, the reserved cavity is arranged to reduce the bottom area of the prefabricated components, and the effect of secondary cast-in-place concrete compactness is achieved. Through the cast-in-place mode of the prefabricated parts and the reserved cavities of the elevator foundation structure, the structural layout is optimized, the purposes of guaranteeing the bearing capacity and reducing the self weight are achieved, and the site construction efficiency and the construction quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to a post-installed elevator foundation structure. Background Art

[0002] When installing an elevator later, the traditional method is to construct the elevator base structure by pouring reinforced concrete on-site. This process includes construction steps such as excavating the foundation, tying the steel frame, and pouring concrete. The entire on-site construction period is long, and after pouring, a certain period of curing is required to ensure that the concrete reaches the required strength standards. Moreover, because the elevator foundation construction site is located below ground level, the curing effect of the concrete foundation is easily affected by external factors such as sewage pipes, rainwater, groundwater, and leaking tap water. This leads to significant quality problems in the on-site pouring, and rework is required. Currently, there is a precast concrete elevator foundation structure that can significantly shorten construction time. However, due to the heavy weight of the precast components, a large-tonnage crane is required for lifting operations during installation. The limited work site poses a significant safety hazard, and in actual operation, it is still not convenient for construction. Chinese patent CN209837075U discloses a prefabricated, assembled concrete foundation for an additional elevator, comprising a raft and a cylinder. The raft is a flat plate that can be placed on a foundation; the cylinder is a rectangular frame that is cast in-situ on the upper surface of the raft; four pre-embedded steel plates are provided within the elevator foundation pit enclosed by the cylinder; these pre-embedded steel plates are fixed to the upper surface of the raft and can be connected to the elevator shaft. This patent disassembles the additional elevator foundation and prefabricates some of its components in a factory, which are then transported to the construction site for assembly, facilitating transportation and assembly. However, the prefabricated components are heavy, making them inconvenient for on-site construction and hoisting. Utility Model Content

[0003] The main purpose of the utility model is to provide a post-installed elevator foundation structure to solve the problem that the elevator foundation structure is heavy, inconvenient for transportation and lifting operations, the bottom area of ​​the structure is large, the curing effect of the concrete foundation is poor during on-site pouring or the bottom concrete is not dense, causing the elevator foundation to sink.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a rear-installed elevator foundation structure, including a base plate and side walls arranged above the base plate, the side walls and the base plate are connected to form a rectangular cavity structure with an open top, and pillars are provided at the connection between adjacent side walls. The lower part of the pillars is arranged in the base plate, and a reserved cavity is also provided inside the base plate, and the reserved cavity is used for on-site pouring of concrete.

[0005] In a preferred embodiment, the reserved cavity is a discontinuous structure, and the reserved cavity is a trapezoidal body that is narrow at the top and wide at the bottom, or a rectangular body that is flush at the top and bottom.

[0006] In the preferred embodiment, the reserved cavity is divided into two trapezoidal cavities by an inverted trapezoidal pier body 1 provided in the base plate, and the inverted trapezoidal pier body 1 is used to set the elevator car shock absorber; an inverted trapezoidal pier body 2 is provided near the side wall of the base plate to make the side of the reserved cavity trapezoidal, and the inverted trapezoidal pier body 2 is used to set the elevator counterweight shock absorber.

[0007] In a preferred embodiment, the reserved cavity includes a reserved side plate connecting the bottom plate and the side wall, and the interior of the reserved cavity is provided with a first reserved layer, a second reserved layer and a third reserved layer in sequence from bottom to top.

[0008] In the preferred embodiment, the bottom plate includes a lower template and an upper template, the lower template is connected to the outer template provided on the outer side of the side wall, and the upper template is connected to the inner template provided on the inner side of the side wall. The bottom plate and the side wall are respectively connected by steel cages.

[0009] In a preferred embodiment, the steel cage includes an outer steel mesh and an inner steel mesh, which are connected by connecting steel bars.

[0010] In a preferred embodiment, the outer steel mesh in the bottom plate passes through the reserved side plates and extends above the first reserved layer, and the inner steel mesh passes through the reserved side plates and extends above the second reserved layer.

[0011] In the preferred embodiment, an embedded steel plate is provided at the top of the pillar, and the embedded steel plate is adjusted by anchor bolts for leveling connection with the elevator shaft frame.

[0012] In a preferred embodiment, a foot plate is provided at the bottom end of the pillar, the side length of the bottom cross section of the foot plate is greater than the side length of the bottom cross section of the pillar, and the foot plate and the pillar are connected by anchor bolts or welding.

[0013] In the preferred embodiment, a stiffening rib is provided on the outer side of the pillar, and the stiffening rib is located between the pillar and the foot plate to improve the connection strength.

[0014] The utility model provides a post-installed elevator foundation structure, including a bottom plate and side walls arranged above the bottom plate, the side walls and the bottom plate are connected to form a rectangular cavity structure with an open top, pillars are provided at the connection between adjacent side walls, the lower parts of the pillars are arranged in the bottom plate, and a reserved cavity is also provided inside the bottom plate, and the reserved cavity is used for on-site pouring of concrete. This structure completes the primary prefabrication of the surrounding and bottom components of the elevator foundation structure in the factory, and completes the secondary pouring of the reserved cavity in the elevator foundation structure during on-site construction. The reserved cavity is arranged to reduce the bottom area of ​​the prefabricated components, so as to achieve the effect of dense secondary on-site pouring of concrete, and avoid the problem of overall structural settlement caused by loose pouring. By means of on-site pouring of the prefabricated components and the reserved cavity of the elevator foundation structure, the structural layout is optimized, the purpose of both ensuring the load-bearing capacity and reducing the deadweight is achieved, and the on-site construction efficiency and construction quality are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 1 is a top view of the elevator infrastructure of Example 1 of the present utility model;

[0017] Figure 2 This utility model Figure 1 AA section view;

[0018] Figure 3 This utility model Figure 1 BB cross-sectional view;

[0019] Figure 4 It is a top view of the pillar in the utility model;

[0020] Figure 5 This utility model Figure 4 CC cross-sectional view;

[0021] Figure 6 1 is a top view of the elevator infrastructure structure according to Embodiment 2 of the present invention;

[0022] Figure 7 This utility model Figure 6 DD cross-sectional view;

[0023] In the figure: base plate 1; lower formwork 101; upper formwork 102; side wall 2; outer formwork 201; inner formwork 202; pillar 3; reserved cavity 4; first reserved layer 401; second reserved layer 402; third reserved layer 403; reserved side plate 404; embedded steel plate 5; steel cage 6; outer steel mesh 601; inner steel mesh 602; connecting steel bar 603; foot plate 7; anchor bolt 8; stiffening rib 9; pier body 1 a; pier body 2 b. DETAILED DESCRIPTION

[0024] Example 1:

[0025] like Figures 1 to 7As shown, a post-installed elevator foundation structure includes a base plate 1 and side walls 2 disposed above the base plate 1. The side walls 2 and the base plate 1 are connected to form a rectangular cavity structure with an open top. Support columns 3 are provided at the connection points of adjacent side walls 2. The lower portion of the support columns 3 is disposed within the base plate 1. The base plate 1 also has a reserved cavity 4 inside for on-site concrete pouring. In this structure, multiple side walls 2 are vertically connected to form a rectangular structure. The bottom of the side walls 2 is connected to the base plate 1. The vertical connection between the base plate 1 and the side walls 2 is groove-shaped. The central cavity is used to accommodate elevator components. Support columns 3 are provided at the connection points between the side walls 2. The support columns 3 are vertically disposed above the base plate 1 to bear the weight of the structure. A reserved cavity 4 is provided within the base plate 1 for secondary concrete pouring during on-site construction to reduce the weight of the prefabricated components of the elevator foundation structure and facilitate subsequent hoisting. The reserved cavity 4 is arranged at the bottom of the structure to reduce the bottom area of ​​the prefabricated components, thereby reducing the contact area between the overall structure and the foundation pit and enhancing the compaction effect of the secondary concrete pouring. This structure completes the primary prefabrication of the surrounding and bottom components of the elevator foundation structure in the factory, and completes the secondary pouring of the reserved cavity 4 in the elevator foundation structure during on-site construction. By prefabricated components of the elevator foundation structure and on-site pouring of the reserved cavity 4, the structural layout is optimized to achieve the purpose of ensuring the load-bearing capacity while reducing the deadweight, thereby improving on-site construction efficiency and construction quality.

[0026] In the preferred embodiment, Figures 1 to 7 As shown, the reserved cavity 4 is a discontinuous structure, either a trapezoidal shape with a narrow top and a wide bottom, or a rectangular shape with flat top and bottom. With this structure, in the elevator foundation structure used to house elevator equipment in this embodiment, the corresponding reserved cavity 4 is a trapezoidal cavity structure with a narrow top and a wide bottom. The upper area of ​​the reserved cavity 4 is small to ensure the bearing capacity of the prefabricated component structure, while the lower area is large to facilitate filling the gap at the bottom during the secondary cast-in-place concrete, ensuring a dense effect. The trapezoidal structure of the reserved cavity 4 not only ensures structural stability but also serves to distribute and carry external loads. Preferably, the elevator foundation structure of this embodiment is 2600mm x 2400mm x 2000mm; the central cavity between the bottom plate 1 and the side wall 2 is 2000mm x 1800mm x 1500mm; the trapezoidal reserved cavity 4 is 200mm to 300mm wide at the top, 600mm wide at the bottom, 1800mm long, and 500mm high.

[0027] In the preferred embodiment, Figures 1-3As shown, the reserved cavity 4 is divided into two trapezoidal cavities by the inverted trapezoidal pier body 1a provided in the base plate 1. The inverted trapezoidal pier body 1a is used to install the elevator car shock absorber. The base plate 1 is provided with an inverted trapezoidal pier body 2b near the side wall 2 to make the side of the reserved cavity 4 trapezoidal. The inverted trapezoidal pier body 2b is used to install the elevator counterweight shock absorber. With this structure, the base plate 1 of this embodiment includes the inverted trapezoidal pier body 1a located in the middle and the inverted trapezoidal pier body 2b located at both ends, and the reserved cavity 4 is divided into two trapezoidal cavity structures, thereby reducing the bottom area of ​​the prefabricated component. The car shock absorber is located in the middle position of the upper surface of the base plate 1, and the counterweight shock absorber is symmetrically arranged on the upper surface of the base plate 1 near the side wall 2 to reduce elevator vibration and protect electromechanical equipment.

[0028] In the preferred embodiment, Figures 1-3 As shown, the reserved cavity 4 includes a reserved side panel 404 connecting the bottom plate 1 and the side wall 2. The interior of the reserved cavity 4 is sequentially provided with a first reserved layer 401, a second reserved layer 402, and a third reserved layer 403 from bottom to top. With this structure, the reserved side panel 404 is arranged within the bottom plate 1, with the upper and lower ends of the reserved side panel 404 connected to the bottom plate 1, and the left and right ends connected to the side wall 2. The symmetrically arranged reserved side panels 404 are connected to the bottom plate 1 and the side wall 2 to form the reserved cavity 4. The reserved cavity 4 is filled with foam material during prefabrication in the factory. The foam material is removed at the construction site, and the reserved cavity 4 is fully filled with concrete for a second time, reducing on-site construction time and improving the cast-in-place compaction effect. Preferably, the first reserved layer 401, the second reserved layer 402 and the third reserved layer 403 are respectively provided with foam materials with thicknesses of 100 mm, 350 mm and 50 mm. The thicknesses of the first reserved layer 401 and the third reserved layer 403 are both smaller than the thickness of the second reserved layer 402, so as to facilitate the cleaning of the bottom and top layers of filling materials on site.

[0029] In the preferred embodiment, Figures 1-3 As shown, the base plate 1 includes a lower formwork 101 and an upper formwork 102. The lower formwork 101 is connected to the outer formwork 201 provided on the outside of the side wall 2, and the upper formwork 102 is connected to the inner formwork 202 provided on the inside of the side wall 2. A steel cage 6 is provided inside the base plate 1 and the side wall 2 to connect them. With this structure, the lower formwork 101 and the outer formwork 201 are connected to form the prefabricated outer frame of the elevator substructure, while the upper formwork 102 and the outer formwork 201 are connected to form the prefabricated inner frame of the elevator substructure. Concrete is poured into the base plate 1 and the side wall 2 to form a "U"-shaped structure. A steel cage 6 is provided inside to increase tensile strength and prevent concrete cracking.

[0030] In the preferred embodiment, Figure 2 and 3As shown, the steel cage 6 includes an outer steel mesh 601 and an inner steel mesh 602, which are connected by connecting bars 603. With this structure, the outer steel mesh 601 is provided on the inner side of the lower formwork 101 and the outer formwork 201, respectively, and the inner steel mesh 602 is provided on the inner side of the upper formwork 102 and the inner formwork 202, respectively. The connecting bars 603 are connected to the outer steel mesh 601 at one end and to the inner steel mesh 602 at the other end. They are connected to the elevator substructure and the bottom by welding or tying to improve the load-bearing capacity of the overall structure.

[0031] In the preferred embodiment, Figure 2 and 3 As shown, the outer steel mesh 601 in the bottom plate 1 passes through the reserved side panels 404 and extends above the first reserved layer 401, and the inner steel mesh 602 passes through the reserved side panels 404 and extends above the second reserved layer 402. With this structure, the reserved side panels 404 are provided with reserved holes, the outer steel mesh 601 passes through the holes and is arranged above the first reserved layer 401, and the inner steel mesh 602 passes through the holes and is arranged above the second reserved layer 402. The outer steel mesh 601 and the inner steel mesh 602 are arranged in the reserved cavity 4 to improve the stability of the structure, facilitate the pouring of concrete directly into the reserved cavity 4 during on-site pouring, and improve construction efficiency.

[0032] In the preferred embodiment, Figure 1 and 4 As shown, a pre-buried steel plate 5 is installed at the top of the pillar 3. Anchor bolts 8 are used to adjust the pre-buried steel plate 5 for leveling and connecting it to the elevator shaft frame. With this structure, the pre-buried steel plate 5 is adjusted and fixed by anchor bolts 8 for leveling and alignment, enabling weld alignment with the elevator shaft frame. Preferably, the pillar 3 is a steel column, and the anchor bolts 8 have a diameter of 20 mm.

[0033] In the preferred embodiment, Figure 5 As shown, a foot plate 7 is provided at the bottom end of the support 3. The side length of the bottom cross-section of the foot plate 7 is greater than that of the bottom cross-section of the support 3. The foot plate 7 and the support 3 are connected by anchor bolts 8 or welding. This structure provides a larger contact area at the bottom of the foot plate 7 than at the bottom of the support 3. By increasing the contact area of ​​the support 3, the pull-out resistance can be improved, ensuring the stability of the overall structure when concrete is poured into the bottom plate 1 and side wall 2. Preferably, the foot plate 7 is 20 mm thick.

[0034] In the preferred embodiment, Figure 5 As shown, stiffening ribs 9 are provided on the outside of the pillars 3, located between the pillars 3 and the footplate 7, to enhance the connection strength. This structure strengthens the vertical rigidity of the pillars 3 by means of the stiffening ribs 9, ensuring the verticality of the sidewalls 2 during concrete pouring. Preferably, the stiffening ribs 9 are 6 mm thick.

[0035] Example 2:

[0036] Further illustrate with reference to Example 1, Figure 6 and 7 In the structure shown, in the preferred embodiment, the reserved cavity 4 is a discontinuous structure, and the reserved cavity 4 is a trapezoidal body that is narrow at the top and wide at the bottom, or a rectangular body that is flush at the top and bottom. Due to this structure, the elevator foundation structure in this embodiment also includes a middle cavity where no elevator equipment is provided, and the reserved cavity 4 corresponding to the bottom thereof is a rectangular cavity structure that is flush at the top and bottom. A reserved cavity 4 of a trapezoidal structure is provided in the bottom plate 1 where the elevator equipment is to be arranged, and a reserved cavity 4 of a rectangular structure is provided in the bottom plate 1 where no elevator equipment is provided. According to the actual load-bearing requirements, the structural layout is optimized to ensure that the weight of the prefabricated components of the elevator foundation structure is reduced while ensuring the same load-bearing capacity, reduce the contact area between the bottom of the prefabricated components and the foundation pit, and improve the compaction effect of the secondary pouring of concrete, which not only facilitates transportation and hoisting operations, but also improves on-site construction efficiency and quality.

[0037] Preferably, the elevator foundation structure of this embodiment is 4000mmx2400mmx2000mm; the central cavity between the bottom plate 1 and the side wall 2 includes 2000mmx1800mmx1500mm and 1100mmx1800mmx1500mm; the reserved cavity 4 of the trapezoidal structure is 200mm~300mm wide at the top, 600mm wide at the bottom, 1800mm long, and 500mm high; the reserved cavity 4 of the rectangular structure is 1100mmx1800mmx500mm.

[0038] Example 3:

[0039] Further illustrate with reference to Examples 1 and 2, as Figures 1 to 7In the structure shown, most components of the elevator foundation are prefabricated in an integrated manner in the factory. According to the construction drawings, the pillars 3 are fixed and the position of the reserved cavity 4 at the bottom is determined. The foam material is divided into blocks according to the trapezoidal or rectangular shape of the reserved cavity 4. A 100mm thick foam layer is laid in the first reserved layer 401 of the reserved cavity 4, and an outer steel mesh 601 is tied on top. A 350mm thick foam layer is laid in the second reserved layer 402, and an inner steel mesh 602 is tied on top. Finally, a 50mm thick foam layer is laid in the third reserved layer 403. The outer steel mesh 601 and the inner steel mesh 602 are connected by tying or welding with connecting steel bars 603. Steel cages 6 are then arranged around the perimeter and bottom of the elevator foundation. Anchor bolts 8 are installed on the steel cage 6, and the embedded steel plates 5 are adjusted to a leveled position using the anchor bolts 8 for subsequent welding to the derrick. Assemble the outer formwork 201 of the side wall 2 and the lower formwork 101 of the bottom plate 1, assemble the inner formwork 202 of the side wall 2 and the upper formwork 102 of the bottom plate 1, and symmetrically set the reserved side panels 404 to connect with the side wall 2 and the bottom plate 1 to form a "U"-shaped prefabricated frame of the elevator foundation structure; pour concrete inside the bottom plate 1 and the side wall 2, and vibrate the concrete evenly with a vibrating rod. After the concrete is cured, remove all the formwork to complete the prefabricated components of the elevator foundation structure.

[0040] According to the construction drawings, a foundation pit for placing the elevator foundation is excavated at the construction site, and a 100mm thick concrete cushion layer is laid; the prefabricated components of the elevator foundation structure are hoisted by crane and placed at the corresponding positions in the foundation pit; the foam material is removed and cleaned, and a secondary pouring of concrete is completed in the reserved cavity 4 of the elevator foundation structure until all gaps are filled; concrete is filled around the periphery of the elevator foundation structure and backfilled to ground level. The concrete is evenly vibrated with a vibrating rod and completed curing, completing the prefabrication and installation of the elevator foundation structure.

[0041] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A rear-mounted elevator infrastructure, characterized by: The invention comprises a bottom plate (1) and a side wall (2) arranged above the bottom plate (1), wherein the side wall (2) and the bottom plate (1) are connected to form a rectangular cavity structure with an open top, and a support (3) is provided at the connection between adjacent side walls (2), and the lower part of the support (3) is arranged in the bottom plate (1). A reserved cavity (4) is also provided inside the bottom plate (1), and the reserved cavity (4) is used for on-site pouring of concrete.

2. The rear-mounted elevator infrastructure according to claim 1, characterized in that: The reserved cavity (4) is a discontinuous structure, and the reserved cavity (4) is a trapezoidal body that is narrow at the top and wide at the bottom, or a rectangular body that is flush at the top and bottom.

3. The rear-mounted elevator infrastructure according to claim 1, characterized in that: The reserved cavity (4) is divided into two trapezoidal cavities by an inverted trapezoidal pier body (a) provided in the bottom plate (1), and the inverted trapezoidal pier body (a) is used to set the elevator car shock absorber; A second inverted trapezoidal pier body (b) is provided at a position of the bottom plate (1) close to the side wall (2) so that the side surface of the reserved cavity (4) is trapezoidal. The second inverted trapezoidal pier body (b) is used to set the counterweight shock absorber of the elevator.

4. The post-installed elevator infrastructure according to any one of claims 1 to 3, characterized in that: The reserved cavity (4) comprises a reserved side plate (404) connecting the bottom plate (1) and the side wall (2), and the interior of the reserved cavity (4) is provided with a first reserved layer (401), a second reserved layer (402) and a third reserved layer (403) in sequence from bottom to top.

5. The rear-mounted elevator infrastructure according to claim 4, characterized in that: The bottom plate (1) comprises a lower template (101) and an upper template (102); the lower template (101) is connected to an outer template (201) provided on the outer side of the side wall (2); the upper template (102) is connected to an inner template (202) provided on the inner side of the side wall (2); and steel cages (6) are respectively provided inside the bottom plate (1) and the side wall (2) for connection.

6. The rear-mounted elevator infrastructure according to claim 5, characterized in that: The steel cage (6) comprises an outer steel mesh (601) and an inner steel mesh (602), and the outer steel mesh (601) and the inner steel mesh (602) are connected by connecting steel bars (603).

7. The rear-mounted elevator infrastructure according to claim 6, characterized in that: The outer steel mesh (601) in the bottom plate (1) passes through the reserved side plates (404) and extends above the first reserved layer (401), and the inner steel mesh (602) passes through the reserved side plates (404) and extends above the second reserved layer (402).

8. The rear-mounted elevator infrastructure according to claim 1, characterized in that: An embedded steel plate (5) is provided at the top of the pillar (3), and the embedded steel plate (5) is adjusted by an anchor bolt (8) to be connected to the elevator shaft frame for leveling.

9. The rear-mounted elevator infrastructure according to claim 1, characterized in that: A foot plate (7) is provided at the bottom end of the pillar (3); the side length of the bottom cross section of the foot plate (7) is greater than the side length of the bottom cross section of the pillar (3); the foot plate (7) and the pillar (3) are connected via anchor bolts (8) or welding.

10. The rear-mounted elevator infrastructure according to claim 9, characterized in that: A stiffening rib (9) is provided on the outside of the pillar (3), and the stiffening rib (9) is located between the pillar (3) and the foot plate (7) and is used to improve the connection strength.

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