Construction elevator foundation anti-settlement structure on outdoor backfill soil

Abstract

The invention provides a construction elevator foundation anti-sedimentation structure on outdoor backfill, which comprises a basement outer wall and a foundation pit side slope which are poured in advance, the basement outer wall and the foundation pit side slope are connected through at least two horizontal longitudinal beams, and the horizontal longitudinal beams are connected through horizontal cross beams; the cement mixing piles are buried underground, the crown beams are connected with the cement mixing piles, the crown beams are arranged below the horizontal cross beams, and the crown beams are connected with the horizontal longitudinal beams and the horizontal cross beams through a plurality of supporting columns respectively. Load of the construction elevator is transmitted to the top beam, the basement outer wall and the foundation pit slope through the horizontal longitudinal beams and the horizontal cross beams, the load of the construction elevator is prevented from directly acting on backfill soil, settlement of a foundation of the construction elevator is effectively controlled, and use safety of the construction elevator is guaranteed. The method has the advantages of simple structure, convenience in construction, cost saving and the like.

Description

Technical Field

[0001] This invention relates to the field of construction elevator anti-settlement technology, specifically to an anti-settlement structure for construction elevator foundations on outdoor backfill soil. Background Technology

[0002] Construction elevators are core equipment for vertically transporting personnel and materials in high-rise building construction, and their safe operation is directly related to construction progress and personnel safety. The construction elevator foundation, as a key structure bearing the overall weight and dynamic load of the equipment, is the core link ensuring the stability of the construction elevator throughout its installation, use, and dismantling cycle. The accuracy of its settlement control directly determines the safety and reliability of the equipment's operation.

[0003] In soft soil foundations, backfilled soil areas, or uneven strata, foundations are prone to uneven settlement due to insufficient soil bearing capacity, leading to tilting of elevator guide rails, stress concentration in the tower structure, and even the risk of equipment overturning. Currently, the industry mainly adopts passive measures such as strengthening foundation treatment (e.g., replacing the subgrade or grouting reinforcement) or increasing foundation size to control settlement of construction elevator foundations. However, these methods have problems such as high cost, poor adaptability, and difficulty in dealing with complex working conditions. For example, in soft soil strata, simply increasing the foundation area may lead to uneven diffusion of additional stress in the foundation, which may exacerbate settlement. The effect of grouting reinforcement is greatly affected by the uniformity of the geology and is prone to insufficient reinforcement. Therefore, how to avoid settlement of construction elevator foundations and ensure their safe use has become an urgent problem to be solved. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to propose a construction elevator foundation anti-settlement structure on outdoor backfill soil to solve the problems mentioned in the background section above.

[0005] This invention is achieved through the following technical solution: A construction elevator foundation anti-settlement structure on outdoor backfill soil includes a pre-cast basement exterior wall and a foundation pit slope, wherein the basement exterior wall and the foundation pit slope are connected by at least two horizontal longitudinal beams, and the horizontal longitudinal beams are connected by horizontal transverse beams. It also includes several cement mixing piles buried underground, a capping beam connecting the cement mixing piles, the capping beam being located below the horizontal beam, and the capping beam being connected to the horizontal longitudinal beam and the horizontal beam respectively through multiple support columns.

[0006] Furthermore, one end of the horizontal longitudinal beam is provided with an enlarged head embedded in the slope of the foundation pit.

[0007] Furthermore, the basement exterior walls, horizontal longitudinal beams, enlarged ends, cap beams, support columns, and horizontal transverse beams are all reinforced concrete structures.

[0008] Furthermore, backfill soil is filled between the basement exterior wall and the foundation pit slope, and the height of the backfill soil is level with the horizontal longitudinal beam.

[0009] Furthermore, the cement mixing pile is connected to the basement exterior wall via a wainscoting.

[0010] Furthermore, holes are drilled in the basement exterior wall and rebar is embedded therein, with the rebar depth being greater than or equal to 300mm. The rebar of the horizontal longitudinal beam is welded to the rebar, and concrete is poured after the mold is erected.

[0011] Furthermore, the central axes of the supporting columns, cement mixing piles, capping beams, and horizontal beams are arranged in a coplanar manner.

[0012] The beneficial effects of this invention are as follows: A construction elevator foundation anti-settlement structure on outdoor backfill soil includes a pre-cast basement exterior wall and a foundation pit slope. The basement exterior wall and the foundation pit slope are connected by at least two horizontal longitudinal beams, and the horizontal longitudinal beams are connected by horizontal transverse beams. It also includes several cement mixing piles buried underground, and a capping beam connecting the cement mixing piles. The capping beam is located below the horizontal transverse beams, and the capping beam is connected to the horizontal longitudinal beams and horizontal transverse beams by multiple support columns. The load of the construction elevator is transferred to the capping beam, the basement exterior wall, and the foundation pit slope through the horizontal longitudinal beams and horizontal transverse beams, preventing the load of the construction elevator from directly acting on the backfill soil, effectively controlling the settlement of the construction elevator foundation, and ensuring the safe use of the construction elevator. This invention has the advantages of simple structure, convenient construction, and cost savings. Attached Figure Description

[0013] Figure 1 This is a top-view node diagram of the anti-settlement structure for the construction elevator foundation of the present invention.

[0014] Figure 2 for Figure 1 Cross-sectional view of AA.

[0015] Figure 3 for Figure 1 Cross-sectional view of BB.

[0016] Figure 4 for Figure 1 A magnified view of the central C-axis.

[0017] The above figures include the following reference numerals: 01. Basement exterior wall; 011. Rebar installation; 02. Excavation pit slope; 03. Horizontal longitudinal beam; 031. Enlarged head; 04. Horizontal transverse beam; 05. Cement mixing pile; 06. Crown beam; 07. Support column; 08. Backfill soil; 09. Waist beam; a. Construction elevator foundation. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of aiding understanding the present invention, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0019] Reference Figures 1 to 4 As shown, a construction elevator foundation anti-settlement structure on outdoor backfill soil includes a pre-cast basement exterior wall 01 and a foundation pit slope 02. The basement exterior wall 01 and the foundation pit slope 02 are connected by at least two horizontal longitudinal beams 03, and the horizontal longitudinal beams 03 are connected by horizontal transverse beams 04. It also includes several cement mixing piles 05 buried underground, and a capping beam 06 connecting the cement mixing piles 05. The capping beam 06 is located below the horizontal beam 04. The capping beam 06 is connected to the horizontal longitudinal beam 03 and the horizontal beam 04 by multiple support columns 07.

[0020] The construction elevator foundation a is positioned above the horizontal longitudinal beam 03 and the horizontal transverse beam 04. The load of the construction elevator is transferred through the horizontal transverse beam 04 to the cap beam 06, support column 07, and cement mixing pile 05, and then to the ground. The load is also transferred through the horizontal longitudinal beam to the basement exterior wall 01 and the foundation pit slope 02. This structure prevents the load of the construction elevator from directly acting on the backfill soil 08, effectively controlling the settlement of the construction elevator foundation a and ensuring the safe operation of the construction elevator. This invention has advantages such as simple structure, convenient construction, and cost savings.

[0021] One end of the horizontal longitudinal beam 03 is provided with an enlarged head 031 embedded in the foundation pit slope 02. The enlarged head 031 is embedded inside the soil of the foundation pit slope 02, which can quickly spread the bending moment, shear force and axial load transmitted from the horizontal longitudinal beam 03 to a larger area of ​​soil, significantly reducing stress concentration at a single point. The enlarged head 031 increases the contact area with the soil, further avoiding horizontal displacement and vertical settlement at the end of the horizontal longitudinal beam 03, and ensuring stable support for the construction elevator foundation a.

[0022] The basement exterior wall 01, horizontal longitudinal beam 03, enlarged head 031, capping beam 06, support column 07, and horizontal transverse beam 04 are all reinforced concrete structures. All of the above components are reinforced concrete, with reliable joint connections, forming an overall spatial load-bearing frame that effectively transfers and distributes the construction load of the construction elevator, preventing settlement.

[0023] Backfill soil 08 is filled between the basement exterior wall 01 and the foundation pit slope 02, and the height of the backfill soil 08 is level with the horizontal longitudinal beam 03. After being compacted in layers, the backfill soil 08 can support the horizontal longitudinal beam 03 and the horizontal transverse beam, further reducing the risk of bending deformation of the horizontal longitudinal beam 03 and the horizontal transverse beam under the load of the construction elevator.

[0024] The cement mixing pile 05 is connected to the basement exterior wall 01 via a lintel 09. Through the above structure, an integrated force transmission chain of "cement mixing pile 05 - lintel 09 - basement exterior wall 01" is formed. The lateral resistance of the mixing pile is uniformly transmitted to the basement exterior wall 01 through the lintel 09 in a surface contact manner, avoiding local stress concentration and significantly improving the overall lateral stiffness and stability.

[0025] When the construction elevator load is transferred to the capping beam 06 and cement mixing pile 05 through the horizontal beam 04 and support column 07, the wainscoting beam 09 can convert part of the vertical load into tension or compression on the basement exterior wall 01. The strong bearing capacity of the basement exterior wall 01 (which is already integrated with the main building structure) is used to share the load, preventing the cement mixing pile 05 from settling or tilting due to excessive stress at a single point, and achieving a balanced distribution of the load between the cement mixing pile 05 and the basement exterior wall 01.

[0026] Holes are drilled in the basement exterior wall 01 and rebar 011 is embedded therein. The rebar 011 is at a depth greater than or equal to 300mm. The reinforcing bars of the horizontal longitudinal beam 03 are welded to the rebar 011, and after a mold is erected, concrete is poured. The two rebars form an integral skeleton after welding, so that the shear force and bending moment at the interface between the old and new concrete are transferred through the weld and the rebar 011, increasing the connection between the basement exterior wall 01 and the horizontal longitudinal beam 03.

[0027] The central axes of the support column 07, cement mixing pile 05, cap beam 06, and horizontal beam 04 are arranged in a coplanar manner, thereby forming a vertical-horizontal integrated planar load-bearing skeleton. The load of the construction elevator can be directly transmitted to the ground without eccentric transmission, minimizing the bending of the horizontal beam 04.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A settlement prevention structure for construction elevator foundations on outdoor backfill soil, characterized in that: Includes a pre-cast basement exterior wall (01) and a foundation pit slope (02), wherein the basement exterior wall (01) and the foundation pit slope (02) are connected by at least two horizontal longitudinal beams (03), and the horizontal longitudinal beams (03) are connected by horizontal transverse beams (04); It also includes several cement mixing piles (05) buried underground, and a capping beam (06) connecting the cement mixing piles (05). The capping beam (06) is located below the horizontal beam (04). The capping beam (06) is connected to the horizontal longitudinal beam (03) and the horizontal beam (04) respectively through multiple support columns (07).

2. The anti-settlement structure for a construction elevator foundation on outdoor backfill soil according to claim 1, characterized in that: One end of the horizontal longitudinal beam (03) is provided with an enlarged head (031) embedded in the slope (02) of the foundation pit.

3. The anti-settlement structure for a construction elevator foundation on outdoor backfill soil according to claim 2, characterized in that: The basement exterior wall (01), horizontal longitudinal beam (03), enlarged head (031), cap beam (06), support column (07) and horizontal crossbeam (04) are all reinforced concrete structures.

4. The anti-settlement structure for a construction elevator foundation on outdoor backfill soil according to claim 1, characterized in that: Backfill soil (08) is filled between the basement exterior wall (01) and the foundation pit slope (02), and the height of the backfill soil (08) is level with the horizontal longitudinal beam (03).

5. The anti-settlement structure for a construction elevator foundation on outdoor backfill soil according to claim 1, characterized in that: The cement mixing pile (05) is connected to the basement exterior wall (01) via a waist beam (09).

6. The anti-settlement structure for a construction elevator foundation on outdoor backfill soil according to claim 1, characterized in that: The basement exterior wall (01) is drilled and rebar (011) is embedded. The depth of the rebar (011) is greater than or equal to 300mm. The steel bars of the horizontal longitudinal beam (03) are welded to the rebar (011), and concrete is poured after the mold is built.

7. The anti-settlement structure for a construction elevator foundation on outdoor backfill soil according to claim 1, characterized in that: The central axes of the support column (07), cement mixing pile (05), cap beam (06), and horizontal beam (04) are arranged in a coplanar manner.

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