Axial force meter reinforcing and supporting structure for ultra-deep foundation pit steel support

Abstract

The utility model discloses an axial force meter reinforcing and supporting structure for an ultra-deep foundation pit steel support, which belongs to the technical field of foundation pit construction and comprises a cylindrical connecting pipe, a supporting and reinforcing component is arranged in the connecting pipe, and the connecting end of the connecting pipe is connected with the end of the steel support. The axial force meter is arranged at the supporting end of the connecting pipe and abuts against the supporting and reinforcing assembly. According to the utility model, the connecting pipe is additionally arranged at the end part of the steel support, and the supporting and reinforcing assembly is arranged in the connecting pipe, so that the axial force meter can be arranged at the supporting end of the connecting pipe and is propped against the supporting and reinforcing assembly during installation, and the axial force is effectively dispersed by utilizing the supporting and reinforcing assembly; and the influence on supporting of the subway deep foundation pit caused by excessive deformation of the steel plate at the end of the steel support is avoided. According to the utility model, the bearing capacity of the end part of the steel support can be effectively improved, the support deformation can be controlled within a required range, and safety guarantee is provided for subway deep foundation pit construction.

Description

Technical Field

[0001] The utility model belongs to the technical field of foundation pit construction, and particularly relates to an axial force meter reinforced support structure for an ultra-deep foundation pit steel support. Background Art

[0002] During subway construction, construction operations need to be carried out in ultra-deep foundation pits, and steel supports are often used to support the foundation pit retaining structure to ensure safety during construction. Among them, the support force of the steel support on the side wall retaining structure of the foundation pit is monitored by an axial force meter. At present, due to the small cross-section of the axial force meter, it is installed between the end of the steel support and the subway deep foundation pit retaining structure. After the prestress is applied, the contact surface pressure of the steel support end is too large, causing the steel plate at the end of the steel support to deform, affecting the safety of subway deep foundation pit construction. Utility Model Content

[0003] In order to solve the above problems, the utility model provides an axial force gauge reinforcement support structure for ultra-deep foundation pit steel support.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A support structure reinforced with an axial force gauge for an ultra-deep foundation pit steel support comprises a cylindrical connecting pipe, a support reinforcement assembly is arranged inside the connecting pipe, the connecting end of the connecting pipe is connected to the end of the steel support, and the axial force gauge is arranged at the support end of the connecting pipe and abuts against the support reinforcement assembly.

[0006] Furthermore, the support reinforcement assembly includes a plurality of reinforcement ribs, which are radially and longitudinally arranged in the middle of the connecting pipe, the inner edges of the plurality of reinforcement ribs are arranged in the middle of the connecting pipe, and the diameter of the circle where the outer edges of the plurality of reinforcement ribs are located is greater than the outer diameter of the end of the axial force gauge.

[0007] Furthermore, there are four reinforcement ribs, which are arranged in a cross shape, and the outer edges of the four reinforcement ribs are connected to the inner wall of the connecting pipe.

[0008] Furthermore, the connecting pipe is connected to the end of the steel support via a flange, and one end of the reinforcing rib is fixedly connected to the flange.

[0009] Furthermore, an end cover is provided at the supporting end of the connecting tube, a square opening is provided in the middle of the end cover, a pad can be accommodated in the square opening, the inner wall of the pad can abut against the reinforcing rib, and the outer wall can abut against the end of the axial force gauge.

[0010] Furthermore, the edge of the end cover is larger than the outer diameter of the connecting pipe, and the thickness of the pad is larger than the thickness of the end cover.

[0011] Furthermore, the inner side surface of the pad is provided with stoppers matching the square opening, and the outer edge of the pad is circular or square matching the edge of the end cover.

[0012] Furthermore, a transition steel plate is provided between the outer side of the pad and the axial force gauge, and the size of the transition steel plate is between the outer dimensions of the square opening and the pad.

[0013] Furthermore, a magnet is embedded in the middle of the transition steel plate, and the magnet is an electromagnet or a permanent magnet.

[0014] Furthermore, a plurality of supporting ribs are radially provided on the outer wall of the connecting pipe, and two ends of the supporting ribs are respectively connected to the flange and the end cover.

[0015] Compared with the prior art, the technical progress achieved by the utility model is:

[0016] The utility model adds a connecting pipe to the end of the steel support and installs a support reinforcement component inside the connecting pipe. During installation, the axial force meter can be placed on the support end of the connecting pipe and abutted against the support reinforcement component. The support reinforcement component is used to effectively disperse the axial force to avoid excessive deformation of the steel plate at the end of the steel support, which affects the support of the deep foundation pit of the subway. The utility model can effectively improve the bearing capacity of the steel support end, control the support deformation within the required range, and provide safety protection for the construction of the deep foundation pit of the subway. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0018] In the attached picture:

[0019] Figure 1 An application state diagram of an axial force meter for reinforcing a support structure for an ultra-deep foundation pit steel support provided by an embodiment of the utility model;

[0020] Figure 2 for Figure 1 AA section view of the middle connecting pipe;

[0021] Figure 3 for Figure 1 BB section view of the middle connecting pipe;

[0022] Figure 4 This is a schematic diagram of the structure of the pad in the embodiment of the utility model;

[0023] In the figure:

[0024] 01- steel support, 02- axial force gauge; 1- connecting pipe; 2- reinforcing rib; 3- flange; 4- end cover; 5- square mouth; 6- gasket; 7- stopper; 8- support rib. DETAILED DESCRIPTION

[0025] The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The following will describe the embodiments of the present utility model in conjunction with the accompanying drawings.

[0026] like Figure 1 As shown, an axial force gauge reinforcement support structure for ultra-deep foundation pit steel support includes a cylindrical connecting pipe 1, a support reinforcement assembly is provided inside the connecting pipe 1, the connecting end of the connecting pipe 1 is connected to the end of the steel support 01, and the axial force gauge 02 is arranged at the support end of the connecting pipe 1 and abuts against the support reinforcement assembly. Among them, the support reinforcement assembly includes a plurality of reinforcement ribs 2, the plurality of reinforcement ribs 2 are radially arranged longitudinally in the middle of the connecting pipe 1, the inner edges of the plurality of reinforcement ribs 2 are arranged in the middle of the connecting pipe 1, and the diameter of the circle where the outer edges of the plurality of reinforcement ribs 2 are located is greater than the outer diameter of the end of the axial force gauge 02. By installing the support reinforcement assembly in the connecting pipe at the end of the steel support, the axial force gauge is placed between the support end of the connecting pipe and the inner wall of the subway deep foundation pit, and the internal support reinforcement assembly is used to disperse the axial force, effectively protect the steel plate at the end of the steel support, and ensure the safety of the subway deep foundation pit construction.

[0027] As a preferred structure, Figure 2 and Figure 3 As shown, there are four reinforcing ribs 2, which are arranged in a cross shape, and the outer edges of the four reinforcing ribs 2 are connected to the inner wall of the connecting pipe 1. The structure can be welded with steel plates, which is simple to make and easy to obtain. Of course, the number of reinforcing ribs can also be adjusted according to the actual size of the steel support.

[0028] During specific assembly, the connecting pipe 1 is connected to the end of the steel support 01 through the flange 3, and one end of the reinforcing rib 2 is fixedly connected to the flange 3. The flange at the end of the steel support 01 and the flange at the end of the connecting pipe are fixed by bolts, which is convenient and quick to load and unload, and also convenient for processing and manufacturing.

[0029] Further optimize the above scheme, such as Figure 1As shown, the supporting end of the connecting pipe 1 is provided with an end cap 4, and a square opening 5 is provided in the middle of the end cap 4. The square opening 5 can accommodate a pad 6, and the inner wall of the pad 6 can abut against the reinforcing rib 2, and the outer wall can abut against the end of the axial force gauge 02. Among them, the edge of the end cap 4 is larger than the outer diameter of the connecting pipe 1, and the thickness of the pad 6 is larger than the thickness of the end cap 4. The pad of this structure can be positioned in the square opening to avoid displacement of the pad during construction; the axial force gauge transmits the axial force to the reinforcing rib through the pad, and disperses it through the reinforcing rib.

[0030] In a specific embodiment of the present invention, Figure 4 As shown, the inner side of the gasket 6 is surrounded by stoppers 7 that match the square opening 5, and the outer edge of the gasket 6 is round or square that matches the edge of the end cover 4. The gasket with this structure can not only be positioned in the square opening, but also disperse part of the axial force to the outer wall of the connecting pipe by means of the outer side of the gasket.

[0031] During assembly, a transition steel plate 9 is provided between the outer side of the pad 6 and the axial force gauge 02, and the size of the transition steel plate 9 is between the outer dimensions of the square opening 5 and the pad 6. During specific production, the pad 6 is made of a steel plate with a size of 800*800*40mm, and the transition steel plate is made of a steel plate with a size of 400*400*40mm. The concentrated stress can be gradually converted into a uniformly distributed load through the transition steel plate and the pad, further protecting the end of the steel support.

[0032] To further optimize the above solution, a magnet (not shown in the figure) is embedded in the middle of the transition steel plate 9, and the magnet is an electromagnet or a permanent magnet. The magnet can be used to adsorb the transition steel plate on the backing plate and fix the axial force meter, thereby preventing the transition steel plate and the axial force meter from shifting during the construction process, and better dispersing the stress and axial force.

[0033] When designing specifically, Figure 1-3 As shown, a plurality of support ribs 8 are radially arranged on the outer wall of the connecting pipe 1, and the two ends of the support ribs 8 are respectively connected to the flange 3 and the end cover 4. The use of this structure can improve the bearing capacity of the connecting pipe.

[0034] To sum up, the utility model has the advantages of simple structure, convenient and quick operation, good reinforcement effect, and low production cost. The axial force gauge can transmit the axial force to the internal reinforcement ribs and the external connecting pipes through the transition steel plate and the pad, and gradually transform the concentrated stress into a uniformly distributed load. It effectively solves the problem that the steel support end is deformed due to the installation of the axial force gauge during the construction of ultra-deep subway foundation pits in soft soil layers, affecting the safety of foundation pit construction. The utility model provides a reference and reference for the subsequent steel support construction under similar construction conditions.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the scope of protection of the claims of the utility model.

Claims

1. An axial force gauge for reinforcing a support structure for an ultra-deep foundation pit steel support, characterized in that: It comprises a cylindrical connecting pipe, wherein a supporting reinforcement assembly is arranged inside the connecting pipe, the connecting end of the connecting pipe is connected to the steel supporting end, and the axial force meter is arranged at the supporting end of the connecting pipe and abuts against the supporting reinforcement assembly.

2. The axial force gauge reinforcement support structure for ultra-deep foundation pit steel support according to claim 1 is characterized in that: The support reinforcement assembly includes a plurality of reinforcement ribs, which are radially and longitudinally arranged in the middle of the connecting pipe, the inner edges of the plurality of reinforcement ribs are arranged in the middle of the connecting pipe, and the diameter of the circle where the outer edges of the plurality of reinforcement ribs are located is greater than the outer diameter of the end of the axial force gauge.

3. The axial force gauge reinforcement support structure for ultra-deep foundation pit steel support according to claim 2 is characterized in that: There are four reinforcing ribs, which are arranged in a cross shape, and the outer edges of the four reinforcing ribs are connected to the inner wall of the connecting pipe.

4. The axial force gauge reinforcement support structure for ultra-deep foundation pit steel support according to claim 2 is characterized in that: The connecting pipe is connected to the end of the steel support via a flange, and one end of the reinforcing rib is fixedly connected to the flange.

5. The axial force gauge reinforcement support structure for ultra-deep foundation pit steel support according to any one of claims 2 to 4, characterized in that: The supporting end of the connecting pipe is provided with an end cover, and a square opening is provided in the middle of the end cover. A pad can be accommodated in the square opening, and the inner wall of the pad can abut against the reinforcing rib, and the outer wall can abut against the end of the axial force gauge.

6. The axial force gauge reinforcement support structure for ultra-deep foundation pit steel support according to claim 5 is characterized in that: The edge of the end cover is larger than the outer diameter of the connecting pipe, and the thickness of the pad is larger than the thickness of the end cover.

7. The axial force gauge reinforcement support structure for ultra-deep foundation pit steel support according to claim 6 is characterized in that: The inner side surface of the pad is surrounded by stoppers that match the square opening, and the outer edge of the pad is round or square that matches the edge of the end cover.

8. The axial force gauge reinforcement support structure for ultra-deep foundation pit steel support according to claim 7 is characterized in that: A transition steel plate is provided between the outer side of the pad and the axial force gauge, and the size of the transition steel plate is between the outer dimensions of the square opening and the pad.

9. The axial force gauge reinforcement support structure for ultra-deep foundation pit steel support according to claim 8, characterized in that: A magnet is embedded in the middle of the transition steel plate.

10. The axial force gauge reinforcement support structure for ultra-deep foundation pit steel support according to claim 5, characterized in that: A plurality of supporting ribs are radially arranged on the outer wall of the connecting pipe, and the two ends of the supporting ribs are respectively connected to the flange and the end cover.

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