Recycling device for supporting type steel stand column in deep foundation pit
By designing a steel column recycling device for deep foundation pit engineering, the outer shell and annular plate are used to isolate the steel columns and bottom plate concrete, the problem of the steel columns being unable to be pulled out is solved, and the effective utilization of resources and the improvement of construction efficiency is achieved.
Patent Information
- Application Number
- CN202421799018.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-07-26
AI Technical Summary
In deep foundation pit projects, steel columns are poured into the bottom plate of the foundation pit together, resulting in most of the steel columns buried underground and unable to be pulled out, resulting in waste of resources, and it is difficult to cut and level during later cutting, which requires secondary grinding.
A supporting steel column recovery device in deep foundation pit is designed, including a shell, a first annular plate and a second annular plate. By casting the shell and the first annular plate in the bottom plate concrete, the steel column and the bottom plate concrete are isolated to ensure that all the steel columns can be pulled out.
The complete pull-out, turnover utilization or recycling of steel columns is achieved, resources are saved, the cutting and secondary grinding steps are avoided, construction efficiency is improved, and the connection strength between the device and the bottom plate is improved through the annular plate and groundwater is prevented from influx.
Smart Images
Figure CN222886863U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of deep foundation pit engineering, and particularly relates to a recovery device for the steel column of the internal support in a deep foundation pit. Background Technique
[0002] In the supporting structure of deep foundation pit engineering, if the span is relatively large, steel columns will be arranged in the middle part as the supporting points of the internal support beam to prevent situations such as serious deflection deformation caused by the large span of the support system, which affects the stability of the system. Such steel columns as supporting points can only be processed after the strength of the force transmission belt reaches the requirement and the internal support beam is removed. Usually, they will be poured into the foundation pit together when pouring the bottom slab, and finally the part higher than the bottom slab will be cut off by cutting. This method results in most of the steel columns being buried underground and unable to be pulled out, causing a large amount of resource waste, and it is difficult to cut smoothly during the later removal, and it needs to be polished twice to meet the requirements. Content of the Utility Model
[0003] The main purpose of the utility model is to propose a recovery device for the steel column of the internal support in a deep foundation pit, which can effectively solve the problems in the background technique.
[0004] To achieve the above purpose, the utility model is realized through the following technical solutions:
[0005] A recovery device for the steel column of the internal support in a deep foundation pit, including
[0006] A housing for sleeving outside the steel column, formed by sealing and connecting two U-shaped shells;
[0007] At least one first annular plate, fixed on the outer side of the housing;
[0008] At least one second annular plate, fixed on the inner side of the housing.
[0009] Preferably, the housing is rectangular, and both the first annular plate and the second annular plate are welded by four strip plates.
[0010] Preferably, there is one first annular plate, fixed in the middle of the outer side of the housing.
[0011] Preferably, there are two second annular plates, respectively fixed at the one-third height and two-thirds height of the inner side of the housing.
[0012] Preferably, the housing, the first annular plate, and the second annular plate are all made of steel plates.
[0013] The utility model provides a recovery device for the steel column of the internal support in a deep foundation pit, which has the following beneficial effects:
[0014] 1. The outer shell of the present utility model and the first annular plate are cast in the bottom plate concrete. The outer shell isolates the bottom plate concrete from the steel column, so that the steel column does not need to be cast together with the bottom plate concrete. Thus, the steel column can be completely pulled out. After the steel column is pulled out, it can be reused or recycled as waste materials, saving resources. At the same time, the steps of cutting and secondary grinding are also omitted, improving the construction efficiency.
[0015] 2. The first annular plate is horizontally cast in the bottom plate concrete. Firstly, it can improve the connection strength between the device and the bottom plate concrete, making the device not easily pulled out. Secondly, due to the shrinkage during the hardening process of the concrete, there will inevitably be a gap between the outer shell and the bottom plate concrete. The first annular plate can act as a water stop plate to prevent the groundwater at the bottom of the foundation pit from surging up through the gap between the outer shell and the bottom plate concrete and affecting the surface quality of the bottom plate.
[0016] 3. Similarly, the second annular plate can also improve the connection strength between the device and the bottom plate concrete and act as a water stop plate to prevent the groundwater at the bottom of the foundation pit from surging up through the gap between the outer shell and the slightly expanded anti-seepage concrete. Brief Description of the Drawings
[0017] Figure 1 It is a top view of the recycling device of the present utility model;
[0018] Figure 2 It is a front view of the recycling device of the present utility model.
[0019] In the figure: 1. Outer shell; 11. U-shaped shell; 2. First annular plate; 3. Second annular plate. Detailed Embodiment
[0020] To make the purpose, technical solution and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the drawings of the present utility model.
[0021] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined. In addition, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0024] Embodiment
[0025] Refer to Figure 1-2 As shown, a device for recycling the steel column of the internal support in a deep foundation pit includes a housing 1, at least one first annular plate 2, and at least one second annular plate 3.
[0026] The housing 1 is used to sleeve outside the steel column and is formed by hermetically connecting two U-shaped shells 11; the first annular plate 2 is fixed on the outer side of the housing 1; the second annular plate 3 is fixed on the inner side of the housing 1.
[0027] Two U-shaped shells 11 are customized according to the size of the steel column and the thickness of the floor slab. Before the construction of binding the floor slab steel bars, the two U-shaped shells 11 are clamped around the steel column. After the two U-shaped shells 11 are butted, they are hermetically connected to form a closed housing 1 to ensure the sealing effect and prevent water leakage. The specific connection method can adopt full-weld welding.
[0028] After welding is completed, the first annular plate 2 is welded and fixed to the outside of the housing 1. Then, the bottom plate steel bars are tied, and the bottom plate concrete is poured. After the strength of the bottom plate concrete reaches the requirement, the steel column can be pulled out by a hydraulic jack or other lifting tools. In the utility model, the housing 1 and the first annular plate 2 are poured in the bottom plate concrete. The housing 1 isolates the bottom plate concrete from the steel column, so that the steel column does not need to be poured together with the bottom plate concrete. Therefore, the steel column can be completely pulled out. After the steel column is pulled out, it can be recycled or recycled as waste materials, saving resources. At the same time, the steps of cutting and secondary grinding are also omitted, improving the construction efficiency.
[0029] In the utility model, the first annular plate 2 is horizontally poured in the bottom plate concrete. Firstly, it can improve the connection strength between the device and the bottom plate concrete, making the device not easy to be pulled out. Secondly, due to the shrinkage during the hardening process of the concrete, there will inevitably be a gap between the housing 1 and the bottom plate concrete. The first annular plate 2 can be used as a water stop plate to prevent the groundwater at the bottom of the foundation pit from surging up through the gap between the housing 1 and the bottom plate concrete and affecting the surface quality of the bottom plate.
[0030] After the steel column is pulled out, the second annular plate 3 is welded and fixed to the inside of the housing 1. Then, the inside of the housing 1 is filled with a slightly expanded anti-seepage concrete with a strength grade one higher than that of the bottom plate concrete. Using the slightly expanded anti-seepage concrete can reduce the concrete shrinkage phenomenon. Similarly, the second annular plate 3 can also improve the connection strength between the device and the bottom plate concrete and serve as a water stop plate to prevent the groundwater at the bottom of the foundation pit from surging up through the gap between the housing 1 and the slightly expanded anti-seepage concrete.
[0031] Among them, the first annular plate 2 and the second annular plate can also be divided into two parts and are welded and fixed to the outside and inside of two U-shaped shells 11 in advance. When the two U-shaped shells 11 are butted, the first annular plate 2 and the second annular plate are also butted.
[0032] In a specific implementation, the housing 1 is rectangular, and both the first annular plate 2 and the second annular plate 3 are formed by welding four strip plates.
[0033] In a specific implementation, there is one first annular plate 2, which is fixed in the middle of the outside of the housing 1.
[0034] In a specific implementation, there are two second annular plates 3, which are respectively fixed at one-third height and two-thirds height of the inside of the housing 1.
[0035] In a specific implementation, the housing 1, the first annular plate 2, and the second annular plate 3 are all made of steel plates.
[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A device for recovering supporting steel columns in deep foundation pits, characterized in that: include The outer shell is used to be mounted outside the steel column and is formed by two U-shaped shells sealed and connected; at least one first annular plate fixed to the outer side of the housing; At least one second annular plate is fixed inside the housing.
2. The device for recovering supporting steel columns in deep foundation pit according to claim 1, characterized in that: The shell is rectangular, and the first annular plate and the second annular plate are both formed by welding four strip plates.
3. The device for recovering supporting steel columns in a deep foundation pit according to claim 1, characterized in that: The first annular plate is one and is fixed at the middle part of the outer side of the shell.
4. The device for recovering supporting steel columns in a deep foundation pit according to claim 1, characterized in that: There are two second annular plates, which are respectively fixed at one-third and two-thirds of the height of the inner side of the shell.
5. The device for recovering supporting steel columns in a deep foundation pit according to claim 1, characterized in that: The shell, the first annular plate and the second annular plate are all steel plates.