Foundation pit excavation steel support fixing structure

Abstract

This application belongs to the field of foundation pit support technology and provides a steel support fixing structure for foundation pit excavation, including: a hanging frame obliquely installed above the end of the steel support near the side wall; the hanging frame includes: a U-shaped sleeve and a U-shaped rod, the U-shaped sleeve is set at the top, the U-shaped rod is set at the bottom, the middle tube of the U-shaped sleeve is suspended to the adjacent side wall, the axial direction of the middle tube of the U-shaped sleeve is consistent with the length direction of the side wall, both sides of the U-shaped sleeve are inclined downwards and close to each other, so that the U-shaped opening of the U-shaped sleeve gradually narrows; the middle rod of the U-shaped rod is parallel to the middle tube of the U-shaped sleeve, and the middle rod of the U-shaped rod passes through the lifting lug at the top of the steel support. The upper hanging fixing structure used in this application can first buffer the downward impact force of the steel support to achieve force relief, thereby ensuring that the subsequent rigid stopping method of this application can guarantee that the steel support will not continue to fall, thus achieving the effect of resisting high-strength impact.

Description

Technical Field

[0001] This application relates to the field of foundation pit support technology, and in particular to a steel support and fixing structure for foundation pit excavation. Background Technology

[0002] Steel supports refer to the use of steel pipes, H-beams, angle steel, etc. to enhance the stability of engineering structures. In foundation pit support, steel supports are an indispensable main support structure.

[0003] During the construction of the foundation pit, in order to ensure the stability and fixation of the steel supports and prevent them from falling, the steel supports are usually installed using an upper hanging and lower support method.

[0004] Currently, the traditional method of securing steel supports for fall prevention involves wrapping a steel wire rope around the support once and then fixing it to the side wall, similar to a safety rope to prevent workers from slipping and falling. This method is simple and easy to operate, but the steel wire rope has limited load-bearing capacity. The steel support is thick in diameter, long in length, and extremely heavy. When the steel support falls, the instantaneous impact still poses a risk of breaking the steel wire rope, and it cannot guarantee that the steel support will not fall even after losing its bottom support.

[0005] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0006] The purpose of this application is to provide a steel support fixing structure for foundation pit excavation, so as to solve or alleviate the problem that the traditional anti-fall hanging method of steel support has insufficient support capacity and cannot guarantee that it can fully withstand the impact generated by the instantaneous fall of the steel support.

[0007] To achieve the above objectives, this application provides the following technical solution: This application provides a steel support fixing structure for foundation pit excavation, comprising: a bracket obliquely installed above the end of the steel support near a side wall; the bracket includes: a U-shaped sleeve and a U-shaped rod; the U-shaped sleeve is positioned upwards, and the U-shaped rod is positioned downwards; the middle tube of the U-shaped sleeve is suspended from the adjacent side wall; the axial direction of the middle tube of the U-shaped sleeve is consistent with the length direction of the side wall; both sides of the U-shaped sleeve are inclined downwards and close to each other, so that the U-shape of the U-shaped sleeve gradually narrows; the middle rod of the U-shaped rod is parallel to the side wall. The U-shaped sleeve has a middle tube, and the middle rod of the U-shaped sleeve rod passes through the lifting lug at the top of the steel support. The two side rods of the U-shaped sleeve rod are both inclined upwards and far apart from each other, so that the U-shaped opening of the U-shaped sleeve rod gradually expands outwards, and thus the two side rods of the U-shaped sleeve rod extend into the two side tubes of the U-shaped sleeve. When the steel support suddenly falls, the two side rods of the U-shaped sleeve rod will gradually be pulled out from the two side tubes of the U-shaped sleeve to provide cushioning, and the two side rods of the U-shaped sleeve rod will be stopped after being pulled out from the two side tubes of the U-shaped sleeve for a certain distance.

[0008] Preferably, a hinge seat is fixed on the side wall surface, and the hinge seat is a strip plate.

[0009] Preferably, the hinge seat is horizontally fixed to the wall surface of the side wall, and the surface of the hinge seat is provided with at least two pairs of hinge plates spaced apart along its length. The hinge plate consists of a pair of adjacent and spaced-apart ear plates.

[0010] Preferably, the middle tube of the U-shaped sleeve is connected to the side wall by a hanging plate; One end of the hanging plate extends between two adjacent ear plates and is fixed by a pin. The other end of the hanging plate is fitted over the outside of the middle tube of the U-shaped sleeve.

[0011] Preferably, buffer channels are provided along the axial direction on the outer sides of the upper ends of both sides of the U-shaped sleeve; Both sides of the U-shaped sleeve rod are provided with stop blocks on the outer side of the rod ends; The stop block is located within the corresponding buffer channel and stops at one end of the buffer channel near the middle tube.

[0012] Preferably, the lower ends of both sides of the U-shaped sleeve have radially outward protruding limit plates.

[0013] Preferably, the lower ends of both sides of the U-shaped sleeve are provided with guide channels along the axial direction; The length of the guide channel is greater than the length of the buffer channel.

[0014] Preferably, both sides of the U-shaped sleeve rod have radially extending pressure rods on their outer sides, and the extended ends of the pressure rods pass through the guide channel and protrude outwards. The pressure rod rests at one end of the guide channel near the middle tube.

[0015] Preferably, a buffer spring is provided between the pressure rod and the limiting plate; The buffer spring is sleeved on the outside of the U-shaped sleeve.

[0016] Preferably, multiple guide channels and pressure rods are distributed along the circumferential direction of the U-shaped sleeve; The extension ends of the plurality of pressure rods are connected as one unit by a connecting ring.

[0017] Compared with the closest prior art, the technical solution of this application has the following beneficial effects: The upper-hanging fixing structure used in this application for the steel support can first buffer the downward impact force of the steel support to achieve force relief, thereby ensuring that the subsequent rigid stopping method of this application can guarantee that the steel support will not continue to fall, thus achieving the effect of resisting high-intensity impact. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein: Figure 1 This is the front view of this application; Figure 2 This is a schematic diagram of the overall structure of this application; Figure 3 This is an overall schematic diagram of the hinged seat structure of this application; Figure 4 This is a schematic diagram of the overall assembly of the U-shaped sleeve and U-shaped rod of this application; Figure 5 This is an overall schematic diagram of the U-shaped sleeve structure of this application; Figure 6 This is a schematic diagram of the overall U-shaped sleeve structure of this application.

[0019] In the diagram: 1. U-shaped sleeve; 2. U-shaped sleeve rod; 3. Lifting lug; 4. Hinge seat; 5. Ear plate; 6. Lifting plate; 7. Buffer channel; 8. Stop block; 9. Limiting plate; 10. Guide channel; 11. Pressure rod; 12. Buffer spring; 13. Connecting ring. Detailed Implementation

[0020] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0021] In the following description, the terms "first / second / third" are used merely to distinguish similar objects and do not represent a specific order of objects. It is understood that "first / second / third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing embodiments of this disclosure only and is not intended to limit this disclosure.

[0023] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., 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 application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; direct connections or indirect connections through intermediate components; wired connections, radio connections, or wireless communication signal connections. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0024] This embodiment aims to provide a steel support fixing structure for foundation pit excavation. Its main function is to buffer the impact force of the steel support falling and unload it to ensure that the subsequent rigid stopping method guarantees that the steel support will not continue to fall.

[0025] Reference Figure 1 and Figure 2 The device includes: a bracket, which is installed diagonally above the end of a steel support near the side wall. The side wall is a diaphragm wall. The bracket includes: a U-shaped sleeve 1 and a U-shaped rod 2. The U-shaped sleeve 1 is installed at the top and the U-shaped rod 2 is installed at the bottom. The middle tube of the U-shaped sleeve 1 is suspended from the adjacent side wall, and the axial direction of the middle tube of the U-shaped sleeve 1 is consistent with the length direction of the side wall.

[0026] Reference Figures 1-3 A hinge seat 4 is fixed on the side wall. The hinge seat 4 is a strip plate. The hinge seat 4 is fixed horizontally on the side wall. Three pairs of hinge plates are arranged at intervals along the length of the surface of the hinge seat 4. Expansion bolts or other fasteners are provided between each pair of hinge plates and at both ends of the hinge seat 4 to stably fix the hinge seat 4 to the side wall through the expansion bolts. The hinge plate is composed of a pair of adjacent and spaced ear plates 5. The middle tube of the U-shaped sleeve 1 is connected to the side wall through three hanging plates 6. The upper end of the hanging plate 6 extends into the space between two adjacent ear plates 5, and the hanging plate 6 and the two ear plates 5 are simultaneously passed through and fixed by a pin. The lower end of the hanging plate 6 is sleeved on the outside of the middle tube of the U-shaped sleeve 1.

[0027] Reference Figure 2 , Figure 4 , Figure 5 and Figure 6 Both sides of the U-shaped sleeve 1 are inclined downwards and close to each other, so that the U-shaped opening of the U-shaped sleeve 1 gradually narrows. The middle rod of the U-shaped sleeve 2 is parallel to the middle tube of the U-shaped sleeve 1, and the middle rod passes through the lifting lug 3 at the top of the steel support. The length of the middle rod is less than the length of the middle tube of the U-shaped sleeve 1, so as to avoid the middle rod being too long and reducing the fracture resistance. Both sides of the U-shaped sleeve 2 are inclined upwards and far apart from each other, so that the U-shaped opening of the U-shaped sleeve 2 gradually expands outwards to match the U-shaped opening of the U-shaped sleeve 1, so that the two sides of the U-shaped sleeve 2 extend into the two sides of the U-shaped sleeve 1 respectively.

[0028] In this embodiment, refer to Figure 4 and Figure 5 The upper outer sides of both sides of the U-shaped sleeve 1 are provided with buffer channels 7 along the axial direction, and four buffer channels 7 are distributed along the circumference of the U-shaped sleeve 1. The upper outer sides of both sides of the U-shaped sleeve 2 are provided with four stop blocks 8 corresponding to the buffer channels 7. The four stop blocks 8 are located in the corresponding buffer channels 7, and the stop blocks 8 are stopped at the end of the buffer channel 7 near the middle tube to provide space for the stop blocks 8 to slide downward.

[0029] In this embodiment, refer to Figure 4 and Figure 5 Both sides of the U-shaped sleeve 1 have annular limiting plates 9 protruding radially outward at their lower ends. Both sides of the U-shaped sleeve 1 also have axially oriented guide channels 10 at their lower ends. Four guide channels 10 are distributed along the circumference of the U-shaped sleeve 1. The length of each guide channel 10 must be greater than the length of the buffer channel 7. Four pressure rods 11 extend radially from the outer sides of both ends of the U-shaped sleeve rod 2, corresponding to the guide channels 10, so that the extended ends of the pressure rods 11 pass through the guide channels 10 and protrude outward. This ensures that the radial length of the pressure rods 11 corresponds to that of the limiting plates 9. The pressure rod 11 is positioned at the end of the guide channel 10 near the middle tube to provide space for the pressure rod 11 to slide downwards. A buffer spring 12 is provided between the pressure rod 11 and the limiting plate 9. The buffer spring 12 is sleeved on the outside of the U-shaped sleeve 1. When the U-shaped sleeve 2 is impacted by the falling steel support, the four pressure rods 11 can stably compress the buffer spring 12 to buffer and relieve the force. The buffer spring 12 can be prestressed in the early stage of installation to enhance the initial ability of the U-shaped sleeve 2 to resist the falling impact of the steel support.

[0030] In this embodiment, refer to Figure 4 and Figure 6 The extension ends of the four compression bars 11 are connected together by a connecting ring 13 to enhance the fracture resistance of a single compression bar 11.

[0031] When the steel support suddenly falls, the middle rod of the U-shaped sleeve rod 2 is pulled down first, causing the two side rods of the U-shaped sleeve rod 2 to gradually be pulled out from the two side tubes of the U-shaped sleeve 1. During this period, the pressure rod 11 slides down along the guide channel 10 to squeeze the buffer spring 12 to relieve the force, and the stop block 8 also slides down along the buffer channel 7 at the same time. After the two side rods of the U-shaped sleeve rod 2 are pulled out from the two side tubes of the U-shaped sleeve 1 for a certain distance, that is, after buffering for a certain distance, the stop block 8 will reach the end of the buffer channel 7. At this time, the entire bracket is in a state of axial stress under rigid support. If the steel support still cannot be completely stopped from falling at this time, the stop block 8 will be broken. Afterwards, the steel support can still be stopped from falling by the cooperation of the pressure rod 11 and the buffer spring 12, thus setting multiple obstacles to the falling of the steel support.

[0032] The upper-hanging fixing structure used in this embodiment can first buffer the downward impact force of the steel support to achieve force relief, thereby ensuring that the subsequent rigid stopping method of this application can guarantee that the steel support will not continue to fall, thus achieving the effect of resisting high-intensity downward impact.

[0033] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A steel support and fixing structure for foundation pit excavation, characterized in that, include: A hanging bracket, obliquely installed above the end of a steel support near a side wall, comprises a U-shaped sleeve and a U-shaped rod. The U-shaped sleeve is positioned higher, and the U-shaped rod is positioned lower. The middle tube of the U-shaped sleeve is suspended from the adjacent side wall, with the axial direction of the middle tube aligned with the length of the side wall. Both sides of the U-shaped sleeve are inclined downwards and close to each other, causing the U-shaped opening of the U-shaped sleeve to gradually narrow. The middle rod of the U-shaped rod is parallel to the middle tube of the U-shaped sleeve and passes through a lug at the top of the steel support. Both sides of the U-shaped rod are inclined upwards and far apart, causing the U-shaped opening of the U-shaped rod to gradually expand outwards, thereby allowing the two sides of the U-shaped rod to extend into the two sides of the U-shaped sleeve. When the steel support suddenly falls, the two sides of the U-shaped sleeve will gradually be pulled out from the two sides of the U-shaped sleeve to provide cushioning, and the two sides of the U-shaped sleeve will be stopped after being pulled out from the two sides of the U-shaped sleeve for a certain distance.

2. The steel support and fixing structure for foundation pit excavation according to claim 1, characterized in that, A hinge seat, which is a strip plate, is fixed on the side wall.

3. The steel support and fixing structure for foundation pit excavation according to claim 2, characterized in that, The hinge seat is fixed laterally to the wall surface of the side wall, and the surface of the hinge seat is provided with at least two pairs of hinge plates spaced apart along its length. The hinge plate consists of a pair of adjacent and spaced-apart ear plates.

4. The steel support and fixing structure for foundation pit excavation according to claim 3, characterized in that, The middle tube of the U-shaped sleeve is connected to the side wall by a hanging plate; One end of the hanging plate extends between two adjacent ear plates and is fixed by a pin. The other end of the hanging plate is fitted over the outside of the middle tube of the U-shaped sleeve.

5. The steel support and fixing structure for foundation pit excavation according to claim 1, characterized in that, The upper outer sides of both sides of the U-shaped sleeve are provided with buffer channels along the axial direction. Both sides of the U-shaped sleeve rod are provided with stop blocks on the outer side of the rod ends; The stop block is located within the corresponding buffer channel and stops at one end of the buffer channel near the middle tube.

6. The steel support and fixing structure for foundation pit excavation according to claim 5, characterized in that, Both sides of the U-shaped sleeve have radially outward protruding limit plates at their lower ends.

7. The steel support and fixing structure for foundation pit excavation according to claim 6, characterized in that, The lower ends of both sides of the U-shaped sleeve are provided with guide channels along the axial direction. The length of the guide channel is greater than the length of the buffer channel.

8. The steel support and fixing structure for foundation pit excavation according to claim 7, characterized in that, Both sides of the U-shaped sleeve rod have radially extending pressure rods on their outer sides, and the extended ends of the pressure rods pass through the guide channel and protrude outwards. The pressure rod rests at one end of the guide channel near the middle tube.

9. The steel support and fixing structure for foundation pit excavation according to claim 8, characterized in that, A buffer spring is provided between the pressure rod and the limiting plate; The buffer spring is sleeved on the outside of the U-shaped sleeve.

10. The steel support and fixing structure for foundation pit excavation according to claim 9, characterized in that, The guide channel and the pressure rod are both distributed in multiple ways along the circumference of the U-shaped sleeve; The extension ends of the plurality of pressure rods are connected as one unit by a connecting ring.

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