CN115506399A - Construction method of sinking type construction elevator foundation structure - Google Patents
Construction method of sinking type construction elevator foundation structure Download PDFInfo
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- CN115506399A CN115506399A CN202211222035.0A CN202211222035A CN115506399A CN 115506399 A CN115506399 A CN 115506399A CN 202211222035 A CN202211222035 A CN 202211222035A CN 115506399 A CN115506399 A CN 115506399A
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- 238000010276 construction Methods 0.000 title claims abstract description 159
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 43
- 230000003014 reinforcing effect Effects 0.000 claims description 37
- 230000002787 reinforcement Effects 0.000 claims description 7
- 238000009415 formwork Methods 0.000 claims description 5
- 238000009435 building construction Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/44—Foundations for machines, engines or ordnance
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0007—Production methods using a mold
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The invention belongs to the technical field of building construction, and discloses a construction method of a sunk construction elevator foundation structure. The construction elevator foundation plate constructed according to the construction method of the sinking construction elevator foundation structure is of the sinking structure, the top surface of the construction elevator foundation plate is flush with the top surface of the structural plate, the construction elevator foundation plate and the structural plate form an integrated structure, and after the construction elevator is completed and removed, the construction elevator foundation plate does not need to be chiseled, so that the follow-up construction flow is simplified, and the construction efficiency is improved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of a sunken construction elevator foundation structure.
Background
Construction elevator equipment is manned year thing construction machinery that often uses in the construction, before installing the construction elevator, need pour construction elevator basis earlier. Among the prior art, the construction elevator basis is mostly for the plate basis of pouring now sets up on the floor board, demolishs the back when construction elevator equipment, and the construction elevator basis is spent promptly, generally need chisel the construction elevator basis and remove to lead to the fact the waste of material, and the work progress is loaded down with trivial details, is unfavorable for improving the efficiency of construction.
Disclosure of Invention
The invention aims to provide a construction method of a sunken construction elevator foundation structure, which is characterized in that a construction elevator foundation plate and a structural plate are simultaneously poured, and the top surface of the construction elevator foundation plate is flush with the top surface of the structural plate, so that the construction elevator foundation plate does not need to be chiseled after the construction elevator equipment is used, the waste of materials is avoided, and the working efficiency is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the construction method of the foundation structure of the sinking construction elevator comprises the following steps:
s1: setting up a template, wherein the template is internally provided with a first area and a second area;
s2: binding foundation plate reinforcing steel bars in the first area of the template, and binding reinforcing steel bars in the first area and the second area of the template;
s3: pouring concrete in the formwork, forming a construction elevator foundation plate in the first area, forming a structural plate in the second area, wherein the top surface of the construction elevator foundation plate is flush with the top surface of the structural plate;
s4: and a back jacking device is arranged on the bottom surface of the construction elevator foundation plate.
Preferably, the step of binding reinforcing steel bars in the first area and the second area of the formwork specifically comprises:
binding a plurality of first reinforcing steel bars, wherein the first reinforcing steel bars penetrate through the first region and the second region, and two ends of each first reinforcing steel bar are respectively embedded into walls or beams on two corresponding sides; and then binding a plurality of second reinforcing steel bars, wherein the second reinforcing steel bars penetrate through the first area and the second area, two ends of the second reinforcing steel bars are respectively embedded into walls or beams on two sides corresponding to the second reinforcing steel bars, and the first reinforcing steel bars and the second reinforcing steel bars are crossed transversely and longitudinally to form reinforcing belt beams.
Preferably, four sets of third reinforcing bars are respectively tied around the first region before or after the first reinforcing bars are tied.
Preferably, the topping device includes a plurality of support rods, and step S4 specifically includes:
and connecting the plurality of support rods on the bottom surface of the construction elevator foundation plate and the floor below the bottom surface in a detachable manner.
Preferably, before the support rod is connected between the construction elevator base plate and the floor, connection plates are welded to both ends of the support rod, and when the support rod is connected between the construction elevator base plate and the floor, the connection plates are connected to the construction elevator base plate and the floor by expansion screws.
Preferably, a plurality of the support bars are connected to the first reinforcing bars and the second reinforcing bars of the reinforcing band beam at the crossing positions in the transverse and longitudinal directions.
Preferably, the plurality of support rods located at the position of the transverse and longitudinal intersections of the first reinforcing steel bars and the second reinforcing steel bars of the reinforcing band beam are fixedly connected by a plurality of horizontal rods.
Preferably, when the construction elevator foundation plate is located at a first floor, the supporting rods are arranged in one group, and a plurality of supporting rods in one group are connected between the construction elevator foundation plate and the bottommost floor; when the construction elevator foundation plate is located on the nth floor, the supporting rods are arranged in n groups, the supporting rods are jacked back to the bottommost floor from the construction elevator foundation plate, the n groups of the supporting rods are respectively arranged between the top surface and the bottom surface of each floor, n is a positive integer, and n is larger than or equal to 2.
Preferably, the plurality of horizontal rods are divided into two groups, and the two groups of horizontal rods are arranged at intervals along the vertical direction.
Preferably, there are three third reinforcing bars per set.
The invention has the beneficial effects that:
the construction method of the sinking construction elevator foundation structure provided by the invention comprises the steps of pouring the structural plate and the construction elevator foundation plate in the template simultaneously to enable the top surface of the construction elevator foundation plate to be flush with the top surface of the structural plate, binding reinforcing steel bars in the template before pouring to enhance the connection strength of the construction elevator foundation plate and the structural plate, and using the back jacking device to carry out back jacking on the construction elevator foundation plate. The construction elevator foundation plate constructed according to the construction method of the sinking construction elevator foundation structure is of the sinking structure, the top surface of the construction elevator foundation plate is flush with the top surface of the structural plate, the construction elevator foundation plate and the structural plate form an integrated structure, and after the construction elevator is completed and removed, the construction elevator foundation plate does not need to be chiseled, so that the follow-up construction flow is simplified, and the construction efficiency is improved.
Drawings
Fig. 1 is a cross-sectional view of a foundation plate and a back-up device of a construction elevator according to an embodiment of the present invention;
fig. 2 is a plan view of a foundation plate and third reinforcing bars of a construction elevator according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a reinforcing band beam according to an embodiment of the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 1;
fig. 5 is a plan view of a foundation plate, a reinforcing band beam and a roof return device of a construction elevator according to an embodiment of the present invention.
In the figure:
1. constructing an elevator foundation plate; 2. a structural panel; 3. reinforcing the belt beam; 4. a third reinforcing bar; 5. a support bar; 6. a connecting plate; 7. an expansion screw; 8. a horizontal bar.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts throughout, or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 to 5, an embodiment of the present invention provides a construction method of a sunken construction elevator foundation structure, a construction elevator foundation plate 1 constructed by the construction method of the sunken construction elevator foundation structure is sunken, and the construction elevator foundation plate 1 does not need to be chiseled after the construction is completed by using a construction elevator device.
The construction method of the foundation structure of the sinking construction elevator comprises the following steps: s1, erecting a template, erecting the template on a floor where construction elevator equipment needs to be arranged, and dividing an area in the template into a first area and a second area, wherein the first area is an area where a construction elevator foundation plate 1 is arranged, the second area is a structural plate 2 around the construction elevator foundation plate 1, and the structural plate 2 and the construction elevator foundation plate 1 located inside the structural plate 2 jointly form the floor plate of the floor;
s2, binding foundation plate steel bars in a first area in the template, binding the size of the first area and the foundation plate steel bars according to the requirement of bearing construction elevator equipment (the binding of the foundation plate steel bars of the construction elevator foundation plate 1 is the prior art, the size of the construction elevator foundation plate 1 is 6000mm 4000mm 300mm, which is not described herein again), binding reinforcing steel bars in the first area and a second area in the template, wherein the reinforcing steel bars are used for reinforcing the strength between the structural plate 2 and the construction elevator foundation plate 1 after concrete is poured in the template;
s3, concrete is poured in the formwork, a construction elevator foundation plate 1 is poured in the first area, a structural plate 2 is poured in the second area, the top surface of the formed construction elevator foundation plate 1 is flush with the top surface of the formed structural plate 2, the construction elevator foundation plate 1 and the structural plate 2 form an integral structure with the top surfaces flush, after elevator construction in the later period is completed, the integral top surfaces of the construction elevator foundation plate 1 and the structural plate 2 can be used as a floor, and the construction elevator foundation plate 1 does not need to be chiseled off in the later period;
and S4, setting a back jacking device on the bottom surface of the construction elevator foundation plate 1, and before installing construction elevator equipment on the construction elevator foundation plate 1, setting the back jacking device on the bottom surface of the construction elevator foundation plate 1 for supporting the construction elevator foundation plate 1 in order to further ensure the bearing capacity of the construction elevator foundation plate 1.
The construction elevator foundation plate 1 constructed according to the construction method of the sinking construction elevator foundation structure is of a sinking structure, the top surface of the construction elevator foundation plate 1 is flush with the top surface of the structural plate 2, the construction elevator foundation plate 1 and the structural plate 2 form an integrated structure, and after the construction of the construction elevator is completed and removed, the construction elevator foundation plate 1 does not need to be chiseled, so that the follow-up construction flow is simplified, and the construction efficiency is improved.
The reinforcing bars include a plurality of first reinforcing bars and a plurality of second reinforcing bars. The step of binding the reinforcing steel bars in the first area and the second area specifically comprises the following steps: binding a plurality of first reinforcing steel bars, wherein the first reinforcing steel bars transversely penetrate through the first area and the second area along the horizontal direction, and two ends of the first reinforcing steel bars are respectively embedded into walls or beams on two sides corresponding to the first reinforcing steel bars; and binding a plurality of second reinforcing steel bars, longitudinally penetrating the first region and the second region along the horizontal direction, respectively embedding two ends of the second reinforcing steel bars into walls or beams on two sides corresponding to the second reinforcing steel bars, and after concrete is poured in the template, transversely and longitudinally crossing the first reinforcing steel bars and the second reinforcing steel bars to form a cross-shaped reinforcing belt beam 3. In this structure, four ends of the reinforcing strip beam 3 are embedded in the peripheral beam or wall, respectively, and partial load of the foundation plate 1 of the construction elevator can be dispersed into the peripheral wall or beam.
Specifically, the width x thickness of the reinforcing band beam 3 was 1200mm x 300mm. Referring to fig. 3, the first reinforcing steel bar and the second reinforcing steel bar are 9 reinforcing steel bars with a diameter of 18mm, which are arranged at intervals in the width direction, and are distributed up and down in the thickness direction (i.e., vertical direction).
The reinforcing bars also comprise four sets of third reinforcing bars 4. Before carrying out ligature first strengthening reinforcement or after the ligature second strengthening reinforcement, ligature four groups of third strengthening reinforcement 4 respectively around construction elevator foundatin plate 1, four groups of third strengthening reinforcement 4 pour in the second region to the intensity of the boundary department of reinforcing construction elevator foundatin plate 1 and structural slab 2 prevents that construction elevator foundatin plate 1 from receiving construction elevator equipment's loading force and leading to the boundary department fracture.
Specifically, referring to fig. 1 and 2, three third reinforcing steel bars 4 are provided in each group, and the three third reinforcing steel bars 4 are sequentially arranged at intervals in a direction from the construction elevator foundation slab 1 to the structural slab 2. The third reinforcing bars 4 were 12 in total and 16mm in diameter.
Referring to fig. 1, 4 and 5, the back-jacking device includes a plurality of support rods 5, and step S4 specifically includes: can dismantle a plurality of bracing pieces 5 connect on the floor of the bottom surface of construction elevator foundatin plate 1 and the floor of construction elevator foundatin plate 1 below, adopt a plurality of bracing pieces 5 to carry out the back-jacking to construction elevator foundatin plate 1, ensure the stability of construction elevator foundatin plate 1 bearing load, and bracing piece 5 can dismantle the connection to convenient turnover use.
It will be appreciated that the aim is to ensure that the jack-back device is able to transfer most of the load to the foundation to ensure safety and reliability. If the construction elevator foundation plate 1 is adjacent to the bottommost floor (namely the foundation) and is positioned above the bottommost floor, namely the construction elevator foundation plate 1 is positioned on the first floor, the support rods 5 are arranged in a group, and the plurality of support rods 5 in the group are connected between the construction elevator foundation plate 1 and the bottommost floor; when construction elevator foundatin plate 1 is located the nth floor, bracing piece 5 is provided with n group, exemplarily, when n is 2, bracing piece 5 sets up two sets ofly, and a set of bracing piece 5 sets up between the floor of construction elevator foundatin plate 1 and the floor of the floor board rather than adjacent below, and another group bracing piece 5 sets up between the floor of above-mentioned floor board and the bottommost floor, and every bracing piece 5 that is located the upper strata just sets up with every bracing piece 5 that is located the lower floor. The bracing piece 5 backs to the bottommost floor from construction elevator foundatin plate 1, and n group bracing piece 5 sets up respectively between the top surface and the bottom surface on every layer to guarantee the stability of backing.
In the present embodiment, the support rod 5 is 16 h-shaped steel.
In order to facilitate the installation and the disassembly of the support rod 5, before the support rod 5 is connected between the foundation plate 1 of the construction elevator and the floor, the connecting plates 6 are welded at the two ends of the support rod 5, and when the support rod 5 is connected between the foundation plate 1 of the construction elevator and the floor, the connecting plates 6 are detachably connected with the foundation plate 1 of the construction elevator and the floor of the floor plate through expansion screws 7. This structure can facilitate the detachment and installation of the support rod 5.
The standard knot of construction elevator equipment is located the horizontal and vertical crossing of first reinforcing bar and second reinforcing bar of reinforcing band roof beam 3, and this area is the core load region, consequently, through set up a plurality of bracing pieces 5 at this area closely to strengthen this core load region's bearing strength.
In this embodiment, there are 18 support rods 5 in each set, 4 being located in the core load area. All the other 14 in along the both sides on the width direction of construction elevator foundatin plate 1 distribute 5 bracing pieces 5 respectively, the intermediate position sets up 4 bracing pieces 5 to make the whole bearing capacity of construction elevator foundatin plate 1 more even.
In order to increase the reliability of the 4 support rods 5 in the core load area, two groups of horizontal rods 8 are adopted for reinforcing and welding the 4 support rods 5 in each layer, 4 horizontal rods 8 are arranged in each group, and the two groups of horizontal rods 8 are arranged at intervals in the vertical direction. In the present embodiment, the horizontal bar 8 is made of L50 × 5 angle steel.
The back jacking device in the construction method of the foundation structure of the sunken construction elevator adopts a detachable connection mode, can be used in a turnover mode, is convenient to disassemble and assemble, and improves the working efficiency.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The construction method of the foundation structure of the sinking construction elevator is characterized by comprising the following steps:
s1: setting up a template, wherein the template is internally provided with a first area and a second area;
s2: binding foundation plate reinforcing steel bars in the first area of the template, and binding reinforcing steel bars in the first area and the second area of the template;
s3: concrete is poured in the formwork, a construction elevator foundation plate (1) is formed in the first area, a structural plate (2) is formed in the second area, and the top surface of the construction elevator foundation plate (1) is flush with the top surface of the structural plate (2);
s4: and a back jacking device is arranged on the bottom surface of the construction elevator foundation plate (1).
2. The construction method of the foundation structure of the subsidence construction elevator according to claim 1, wherein the binding of reinforcing bars in the first region and the second region of the formwork is specifically:
binding a plurality of first reinforcing steel bars, wherein the first reinforcing steel bars penetrate through the first region and the second region, and two ends of each first reinforcing steel bar are respectively embedded into walls or beams on two corresponding sides; and then binding a plurality of second reinforcing steel bars, wherein the second reinforcing steel bars penetrate through the first area and the second area, two ends of the second reinforcing steel bars are respectively embedded into walls or beams on two sides corresponding to the second reinforcing steel bars, and the first reinforcing steel bars and the second reinforcing steel bars are crossed transversely and longitudinally to form reinforcing belt beams (3).
3. The construction method of a sunken construction elevator foundation structure according to claim 2, wherein four sets of third reinforcing bars (4) are tied around the first area, respectively, before tying the first reinforcing bars or after tying the second reinforcing bars.
4. The construction method of a foundation structure of a subsidence construction elevator as set forth in claim 2, wherein the back-jacking device includes a plurality of support rods (5), and the step S4 specifically includes:
and detachably connecting the support rods (5) to the bottom surface of the construction elevator foundation plate (1) and a floor below the bottom surface.
5. The construction method of a sunken construction elevator substructure according to claim 4, wherein before the support bar (5) is connected between the construction elevator substructure plate (1) and the floor, connection plates (6) are welded at both ends of the support bar (5), and when the support bar (5) is connected between the construction elevator substructure plate (1) and the floor, the connection plates (6) are connected to the construction elevator substructure plate (1) and the floor by expansion screws (7).
6. The construction method of a sunken construction elevator substructure according to claim 4, wherein a plurality of the support bars (5) among the plurality of support bars (5) are connected to the first reinforcing bars and the second reinforcing bars of the reinforcing band beam (3) at the crossing positions thereof.
7. The construction method of a sunken construction elevator substructure according to claim 6, wherein the plurality of support bars (5) located at the crosswise positions of the first reinforcement bar and the second reinforcement bar of the reinforcement belt beam (3) are fixedly connected using a plurality of horizontal bars (8).
8. The construction method of a sunken construction elevator foundation structure according to any of claims 4 to 7, wherein when the construction elevator foundation slab (1) is on the first floor, the support rods (5) are provided in a group, a plurality of the support rods (5) in a group are connected between the construction elevator foundation slab (1) and the lowest floor; when construction elevator foundatin plate (1) is located the nth floor, bracing piece (5) are provided with n group, bracing piece (5) follow construction elevator foundatin plate (1) back to the bottommost floor, n group bracing piece (5) set up respectively between the top surface and the bottom surface on every layer, n is positive integer, and n is greater than or equal to 2.
9. The construction method of a sunken construction elevator substructure according to claim 7, wherein the plurality of horizontal bars (8) are divided into two groups, and the two groups of horizontal bars (8) are arranged at intervals in a vertical direction.
10. A construction method of a sunken construction elevator substructure according to claim 3, characterized in that there are three third reinforcing bars (4) per set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211222035.0A CN115506399A (en) | 2022-10-08 | 2022-10-08 | Construction method of sinking type construction elevator foundation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211222035.0A CN115506399A (en) | 2022-10-08 | 2022-10-08 | Construction method of sinking type construction elevator foundation structure |
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| CN115506399A true CN115506399A (en) | 2022-12-23 |
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| CN202211222035.0A Pending CN115506399A (en) | 2022-10-08 | 2022-10-08 | Construction method of sinking type construction elevator foundation structure |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106812153A (en) * | 2017-02-16 | 2017-06-09 | 中建四局第三建筑工程有限公司 | Beam and slab type construction elevator foundation construction engineering method in a kind of backfill |
| CN212001239U (en) * | 2020-03-26 | 2020-11-24 | 中国建筑第四工程局有限公司 | Assembled construction elevator basis |
| CN213897207U (en) * | 2020-11-16 | 2021-08-06 | 广东博嘉拓建筑科技有限公司 | Construction elevator basis returns top device |
| CN215290244U (en) * | 2021-01-12 | 2021-12-24 | 中国建筑第四工程局有限公司 | Construction elevator basis returns top device |
| CN216194892U (en) * | 2021-11-03 | 2022-04-05 | 中建四局建设发展有限公司 | Subway upper cover project construction elevator foundation structure |
-
2022
- 2022-10-08 CN CN202211222035.0A patent/CN115506399A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106812153A (en) * | 2017-02-16 | 2017-06-09 | 中建四局第三建筑工程有限公司 | Beam and slab type construction elevator foundation construction engineering method in a kind of backfill |
| CN212001239U (en) * | 2020-03-26 | 2020-11-24 | 中国建筑第四工程局有限公司 | Assembled construction elevator basis |
| CN213897207U (en) * | 2020-11-16 | 2021-08-06 | 广东博嘉拓建筑科技有限公司 | Construction elevator basis returns top device |
| CN215290244U (en) * | 2021-01-12 | 2021-12-24 | 中国建筑第四工程局有限公司 | Construction elevator basis returns top device |
| CN216194892U (en) * | 2021-11-03 | 2022-04-05 | 中建四局建设发展有限公司 | Subway upper cover project construction elevator foundation structure |
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