A combined steel support system for foundation pit support

Abstract

The utility model discloses a combined steel support system for foundation pit support is supported in the crown beam between both sides of foundation pit horizontally, include: embedded part, embedded part is embedded and is connected on the crown beam of one side, hanging board, one end of hanging board is hung and is connected on the embedded part, loose joint, one end of loose joint is overlapped on the hanging board, connecting pipe, connecting pipe is detachably installed on the other end of loose joint, support subassembly, one end of support subassembly is connected on the crown beam of other side, and the other end is detachably connected with connecting pipe, adjust display device, adjust display device is connected with loose joint, is used for adjusting the length and pressure of loose joint, to ensure that the connection of support subassembly and loose joint and both sides crown beam meets the threshold value requirement that adjust display device sets. The utility model is safe and reliable, and the convenient installation and removal can realize real -time monitoring and automatic regulation and alarm function to corresponding stress, effectively promote the stability and security of support system.

Description

Technical Field

[0001] This utility model relates to a support system, specifically a combined steel support system for foundation pit support, belonging to the field of building construction technology. Background Technology

[0002] With the rapid development of the social economy and the increasing scarcity of urban land resources, deep foundation pit engineering has gradually become an indispensable part of modern construction. The stability of foundation pit engineering and the safety of the surrounding environment have become key concerns during the construction process. During foundation pit construction, in order to ensure the balance of soil pressure inside and outside the foundation pit, it is usually necessary to install concrete support piles on the inner side of the retaining wall of the foundation pit, and to install steel pipe supports between the support piles.

[0003] Given the scarcity of land resources, complex engineering geological conditions, and increasingly prominent environmental issues, traditional foundation pit support methods, such as slope excavation, bored piles, and retaining walls with reinforced concrete internal bracing, can no longer meet the growing market demand. Existing support structures typically consist of support steel pipes connected to hinged joints via flanges, which then abut against the walers and concrete support piles on both sides. While this structure effectively provides lateral support, the bending resistance of sheet piles remains limited when the foundation pit excavation depth is significant. To further enhance stability, traditional support systems often employ welded connections between the walers and horizontal bracing; however, this welding method presents numerous problems, particularly the inability to adequately apply prestress and control foundation pit deformation, thus affecting construction safety and quality.

[0004] A search revealed that Chinese utility model patent CN220166943U discloses an integral steel support protection structure for a foundation pit, comprising support structure one and support structure two. Support structure one includes walers at both ends, steel pipes, and hinged joints. The walers, steel pipes, hinged joints, and walers are connected sequentially, with the walers at both ends abutting against concrete support piles. Support structure two includes walers at both ends, steel pipes, and hinged joints; it also includes connector one and connector two. Connector one is fixed to the concrete support piles by expansion bolts. One end of the waler is positioned between connector one and connector two, while the other end of the hinged joint and waler are positioned between connector two and connector one. Connector one and connector two are connected by long bolts, and both ends of the steel pipe are connected to connector two via flanges. A spring is fitted on the outside of the long bolt near the hinged joint, with both ends of the spring abutting against a nut and connector two, respectively. Support structure one and support structure two are spaced apart along a vertical direction. During use, this patent has a high degree of structural complexity and requires high coordination in installation and assembly, which affects construction efficiency. At the same time, the durability and fatigue resistance of the spring directly affect the tensile strength of the second support structure. In addition, the expansion bolt fixing method places high demands on the strength of the concrete support pile. If the pile quality is poor, it may cause the fixing to loosen, creating a safety hazard.

[0005] Therefore, the key to solving the above-mentioned technical problems lies in developing a safe and reliable combined steel support system for foundation pit support. Summary of the Invention

[0006] In view of the many defects and shortcomings of the above-mentioned background technology, this utility model has made improvements and innovations, with the aim of providing a safe, reliable, and easy-to-install and dismantle combined steel support system for foundation pit support, which greatly reduces construction costs, improves construction efficiency, and effectively ensures construction progress.

[0007] Another objective of this invention is to improve the stability and safety of the steel support system, enabling real-time monitoring and automatic adjustment of the force, as well as alarm functions, effectively enhancing the safety performance of the support system and avoiding the risk of instability that may occur in traditional steel support systems under extreme conditions.

[0008] To solve the above problems and achieve the above-mentioned invention objectives, this utility model provides a combined steel support system for foundation pit support, which is achieved by adopting the following design structure and the following technical solution:

[0009] A combined steel support system for foundation pit support, horizontally supported between capping beams on both sides of the foundation pit, includes:

[0010] Embedded parts are pre-embedded and connected to the capping beam on one side;

[0011] The mounting plate is attached to the top of the embedded part at one end.

[0012] The flexible head has one end attached to the hanging board;

[0013] The connecting pipe is detachably installed at the other end of the flexible head;

[0014] The support assembly has one end connected to the crown beam on the other side, and the other end is detachably connected to the connecting pipe;

[0015] Adjust the display device, which is connected to the hinge head, to adjust the length and pressure of the hinge head to ensure that the connection between the support assembly and the hinge head and the crown beams on both sides meets the threshold requirements set by the adjustment display device.

[0016] In this utility model, the capping beam is a steel pipe pile or a reinforced concrete pile.

[0017] Preferably, the embedded component includes a fixing plate and several embedded rods connected to one end of the fixing plate.

[0018] In this utility model, the embedded part is made of 15mm steel plate and HRB400 steel bar 9ɸ20 connected by plug welding. The embedded part is pre-embedded in the reinforced concrete cap beam. The threaded steel bar can be effectively bonded to the concrete and has pull-out resistance.

[0019] Preferably, the mounting plate includes:

[0020] The main body of the mounting plate has an overall "L" shaped structure;

[0021] The baffles are symmetrically connected at both ends of the included angle of the hanging plate body;

[0022] The hanging ear is connected to the upper end of the hanging plate body that is not on the baffle end face, forming a hanging groove;

[0023] The cross-section of the ear loop is L-shaped.

[0024] In this utility model, the upper part of the hanging plate adopts a hanging ear design, which facilitates installation on the fixed plate. The lower part of the hanging plate adopts a support plate and baffles on both sides of the support plate, which have left and right anti-slip and limiting functions, and effectively connect with the embedded parts and the flexible head. Furthermore, the two ends of the hanging ear can also adopt an anti-detachment design, which has an anti-fall-off function and prevents the hanging ear from sliding out from the left and right sides of the fixed plate.

[0025] Preferably, the activator head includes:

[0026] The outer sleeve has a flange connected to its closed end.

[0027] The inner core is fitted into the outer sleeve at one end and connected to an abutment plate at the other end.

[0028] The jack is connected to the inner end of the outer sleeve via a base.

[0029] In this invention, the adjustable head can adjust the distance between the outer sleeve and the inner core within a certain range, thereby enabling the system to be applicable to different support distances of the foundation pit width, and also to adjust the stress.

[0030] Preferably, one end of the inner core is snapped into the outer sleeve, and the abutment plate at the other end overlaps the hanging plate;

[0031] The jack is an intelligent jack, and the working end of the jack is in contact with the end of the inner core located inside the outer sleeve;

[0032] The jack is equipped with sensors and an automatic compensation device.

[0033] In this invention, the jack is a YCW type jack that is currently available on the market. It integrates sensors and an automatic compensation device, and supports real-time data display through an adjustable display device, thus forming an intelligent hydraulic control system.

[0034] Preferably, the adjustment display device is an intelligent display screen, which is connected to the jack via a connecting cable passing through the outer sleeve. The adjustment display device is used to monitor the telescopic support status of the jack in real time and adjust the support force according to the changes.

[0035] In this invention, sensors on the jack monitor the status of the support system in real time, and an automatic compensation device adjusts the support force to ensure system stability. The data is transmitted to an adjustment and display device via a connecting cable. This intelligent control allows for adjustments to the support based on changes, reducing manual intervention. The adjustment and display device is connected to the jack inside the adjustable head and is used to adjust the length and pressure of the jack's working end to ensure that the support assembly matches the crown beam and meets the set threshold requirements.

[0036] Preferably, the connecting pipe includes a fixed pipe and connecting flanges connected to both ends of the fixed pipe, wherein the two ends of the connecting pipe are connected to the hinge and the support assembly by bolt assembly.

[0037] In this invention, the connecting flanges at both ends of the connecting pipe are adapted to the outer sleeve flange and the support pipe flange, and are connected together by a bolt assembly. The bolt assembly includes high-strength bolts, nuts, and washers.

[0038] The fixed pipe can be a standard steel pipe of different sizes. In this example, the steel pipe is made of ɸ426*10mm. The end of the steel pipe is connected to a support pipe flange. The connecting pipe is connected between the swivel head and the support assembly by bolt assembly.

[0039] Preferably, the support component includes:

[0040] Support pipe, one end of which is connected to a support pipe flange;

[0041] The support plate is connected to the other end of the support tube.

[0042] Preferably, the support plate has an overall "L" shape, the support tube is connected to the non-open end of the support plate, and the support tube is connected together by multiple connecting plates on its outer periphery.

[0043] The working principle is as follows: Before using the above-mentioned combined steel support system for foundation pit support, the required components of the combined steel support system need to be manufactured and installed as spares.

[0044] Detailed installation steps:

[0045] First, the components that have been processed and manufactured off-site from the purchased materials, namely the support system components consisting of embedded parts (1), hanging plates (2), flexible heads (3), standard connecting pipes of different lengths (4), and support components (5), are transported to the site. The structural dimensions, specifications, and equipment of the components are checked to see if they meet the design requirements. If they do not meet the requirements, they need to be reprocessed or adjusted.

[0046] Then, after the internal reinforcement of the crown beam (8) is tied, the management personnel mark the specific installation position of the embedded part (1) by measuring and setting out, and install the embedded part (1) in the crown beam (8). The embedded rod (12) is welded to the internal reinforcement of the crown beam (8) by welding, which effectively ensures the accurate position of the embedded part. The fixing plate (11) is slightly higher than the concrete finished surface of the crown beam (8) by 3-5cm. Then the side template of the crown beam (8) is installed. After inspection and acceptance, the concrete pouring of the crown beam (8) is completed. Thus, the installation of the embedded part (1) is completed.

[0047] Next, at the construction site, the flexible head (3), connecting pipe (4), and support component (5) are effectively connected by bolt assembly (7) to form a support connection unit, which is kept for future use.

[0048] Finally, after the excavation depth of the foundation pit is 1.2 to 1.5 m and the concrete of the capping beam (8) reaches the design strength, the support connection unit is installed. Before installation, the hanging plate (2) is installed on each embedded part (1) and effectively connected to the fixing plate (11) through the hanging ear (23). Then, the professional operator operates the crane and the workers cooperate to lift the support connection unit to the designated position and install it on the embedded part (1) and the capping beam (8) at the opposite end of the embedded part (1).

[0049] The specific usage steps are as follows:

[0050] First, a portion of the stress is pre-applied to the installed support connection unit using the jack (34) inside the movable head (3);

[0051] Then, the position and angle of the installed support connection unit are fine-tuned until they meet the installation and usage requirements.

[0052] Finally, continue to apply stress to the support connection unit and adjust the jack (34) by adjusting the display device (6). When the reading on the adjustment display device (6) reaches the design value, stop applying stress. Continue to install the above-mentioned support connection units until they are installed, thus completing the support work of the foundation pit.

[0053] During the above-mentioned use, when the stress loss or increase reaches a certain value, the adjustment display device (6) will automatically alarm, and it is necessary to reapply stress or check the deformation of the foundation pit and take corresponding measures.

[0054] After use, it needs to be dismantled. The specific dismantling steps are as follows:

[0055] First, when the backfill of the foundation pit reaches 1.2 to 1.5m from the top of the cap beam (8), the support connection unit is removed. Before removal, the stress applied by the previous support connection unit should be completely released. The support connection unit is lifted out of the foundation pit by professional operators operating the crane and manual assistance.

[0056] Then, remove the hanging plate (2), disassemble the support connection unit into the flexible head (3), connecting pipe (4), and support assembly (5) through the bolt assembly (7), and transport them to the designated warehouse for storage and future use;

[0057] Next, the operators used an excavator with a breaker head to break up the cap beam (8), recover the embedded parts (1) and the steel bars inside the cap beam (8), and clean up the construction waste and residue on site;

[0058] Finally, the operators used the extraction machine to remove the steel pipe piles and transport them to the designated material storage yard for future use.

[0059] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0060] 1. This utility model is safe and reliable, easy to install and disassemble, can greatly reduce construction costs, improve construction efficiency, effectively guarantee construction progress, and meet the multiple requirements of modern construction projects for construction safety, efficiency and cost.

[0061] 2. This utility model can improve the stability and safety of the steel support system, and can realize functions such as real-time monitoring and automatic adjustment of the force and alarm, effectively improving the safety performance of the support system and avoiding the risk of instability that may occur in the traditional steel support system under extreme conditions.

[0062] 3. The flexible head of this utility model, when paired with the adjustment and display device, can realize the real-time monitoring and automatic adjustment of the corresponding force. The adjustment and display device can display stress values ​​and alarm functions, realize timely monitoring of the corresponding force and stress loss, and add alarm functions, effectively improving the safety performance of the support system. Attached Figure Description

[0063] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0064] Figure 1 This is one of the usage state diagrams of this utility model;

[0065] Figure 2 This is the second diagram showing the usage state of this utility model;

[0066] Figure 3 This is the third diagram showing the usage state of this utility model;

[0067] Figure 4 This is the fourth diagram showing the usage state of this utility model;

[0068] Figure 5 This is the fifth diagram showing the usage state of this utility model;

[0069] Figure 6 This is a schematic diagram of the overall structure of this utility model;

[0070] Figure 7 This is an exploded view of this utility model;

[0071] Figure 8 This is a structural schematic diagram of the embedded component of this utility model;

[0072] Figure 9 This is a structural schematic diagram of the hanging plate component of this utility model;

[0073] In the figure, the numbers are: 1—embedded part, 11—fixing plate, 12—embedded rod;

[0074] 2—Hanging plate, 21—Hanging plate body, 22—Baffle, 23—Hanging ear;

[0075] 3—Adjustable head, 31—Outer sleeve, 32—Outer sleeve flange, 33—Inner core, 34—Jack, 35—Base;

[0076] 4—Connecting pipe;

[0077] 5—Support component, 51—Support tube, 52—Support plate;

[0078] 6—Adjust the display device;

[0079] 7— Bolt assembly;

[0080] 8—Crown Beam. Detailed Implementation

[0081] To make the technical means, inventive features, objectives, and effects of this utility model readily understandable, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0082] As per the instruction manual Figures 1 to 9 As shown, a combined steel support system for foundation pit support is horizontally supported between the capping beams 8 on both sides of the foundation pit, comprising:

[0083] Embedded part 1 is pre-embedded and connected to the cap beam 8 on one side;

[0084] Hanging plate 2, one end of which is attached above the embedded part 1;

[0085] The hinge 3 has one end attached to the hanging plate 2;

[0086] Connecting pipe 4 is detachably installed at the other end of the flexible head 3;

[0087] Support component 5, one end of which is connected to the crown beam 8 on the other side, and the other end is detachably connected to the connecting pipe 4;

[0088] Adjust the display device 6, which is connected to the flexor head 3, to adjust the length and pressure of the flexor head 3, so as to ensure that the connection between the support component 5 and the flexor head 3 and the crown beams on both sides meets the threshold requirements set by the adjustment display device 6.

[0089] In this utility model, the crown beam 8 is a steel pipe pile or a reinforced concrete pile.

[0090] Furthermore, the embedded part 1 includes a fixing plate 11 and several embedded rods 12 connected to one end of the fixing plate 11.

[0091] In this utility model, the embedded part 1 is fixed with a 15mm steel plate and the HRB400 steel bar embedded rod 9ɸ20 is connected by plug welding. The embedded part 1 is pre-embedded into the reinforced concrete cap beam 8. The threaded steel bar can be effectively bonded to the concrete and has pull-out resistance.

[0092] Furthermore, the mounting plate 2 includes:

[0093] The mounting plate body 21 has an overall "L" shaped structure.

[0094] Baffle 22 is symmetrically connected to both ends of the included angle of the hanging plate body 21;

[0095] The hanging ear 23 is connected to the upper end of the hanging plate body 21 on the non-baffle 22 end face to form a hanging groove;

[0096] Among them, the cross-section of the ear loop 23 is "L" shaped.

[0097] In this utility model, the upper part of the hanging plate 2 adopts the design of the hanging ear 23, which facilitates installation on the fixed plate 11. The lower part of the hanging plate 2 adopts the support plate and the baffles 22 on both sides of the support plate, which have the function of preventing left and right slippage and limiting movement, and effectively connects with the embedded part connection 2 and the flexible head 3. Furthermore, the two ends of the hanging ear 23 can also adopt the anti-dislodgement design, which has the function of preventing the hanging ear 23 from sliding out from the fixed plate 11.

[0098] Furthermore, the movable head 3 includes:

[0099] The outer sleeve 31 has a closed end connected to an outer sleeve flange 32;

[0100] The inner core 33 has one end fitted into the outer sleeve 31, and the other end is connected to an abutment plate.

[0101] Jack 34 is connected to the inner end of the outer sleeve near the closed end via base 35.

[0102] In this invention, the flexible head 3 can adjust the distance between the outer sleeve 31 and the inner core 33 within a certain range, thereby enabling the system to be applicable to different support distances of the foundation pit width, and also to adjust the stress.

[0103] Specifically, one end of the inner core 33 is snapped into the outer sleeve 31, and the abutment plate at the other end overlaps the hanging plate 2;

[0104] The jack 34 is an intelligent jack, and the working end of the jack 34 is in contact with the end of the inner core 33 located inside the outer sleeve 31.

[0105] Among them, the jack 34 is equipped with sensors and an automatic compensation device.

[0106] In this utility model, the jack 34 is the existing technology, which is a YCW type jack that can be purchased on the market. It integrates sensors such as pressure sensors and automatic compensation devices, and supports real-time data display such as pressure and stroke through the adjustment display device 6, thus forming an intelligent hydraulic control system.

[0107] Furthermore, the adjustment display device 6 is an intelligent display screen, which is connected to the jack 34 via a connecting cable passing through the outer sleeve 31. The adjustment display device 6 is used to monitor the telescopic support status of the jack 34 in real time and adjust the support force according to the changes.

[0108] In this invention, sensors on the jack 34 monitor the status of the support system in real time, and an automatic compensation device adjusts the support force to ensure system stability. The data is then transmitted to the adjustment and display device 6 via a connecting cable. This intelligent control allows for adjustments to the support based on changes, reducing manual intervention. The adjustment and display device 6 is connected to the jack 34 within the adjustable head 3 and is used to adjust the length and pressure of the working end of the jack 34 to ensure that the support assembly 5 matches the crown beam 8 and meets the set threshold requirements.

[0109] Furthermore, the connecting pipe 4 includes a fixed pipe and connecting flanges connected to both ends of the fixed pipe, wherein the two ends of the connecting pipe 4 are connected to the hinge head 3 and the support assembly 5 by bolt assembly 7.

[0110] In this invention, the connecting flanges at both ends of the connecting pipe 4 are adapted to the outer sleeve flange 32 and the support pipe flange, and are connected together by the bolt assembly 7. The bolt assembly 7 includes high-strength bolts, nuts, and washers.

[0111] The fixed pipe can be a standard steel pipe of different sizes. In this example, the steel pipe is made of ɸ426*10mm. The end of the steel pipe is connected to a support pipe flange. The connecting pipe 4 is connected between the flexible head 3 and the support component 5 through the bolt assembly 7.

[0112] Furthermore, the support component 5 includes:

[0113] Support pipe 51, one end of which is connected to a support pipe flange;

[0114] Support plate 52 is connected to the other end of support tube 51.

[0115] Specifically, the support plate 52 has an overall "L" shape, the support tube 51 is connected to the non-open end of the support plate 52, and the support tube 51 is also connected together by multiple connecting plates on its outer periphery.

[0116] Before using the above-mentioned combined steel support system for foundation pit support, the required components of the combined steel support system need to be manufactured and installed as spares.

[0117] Detailed installation steps:

[0118] First, the components that have been processed and manufactured off-site from the purchased materials, namely the support system components consisting of embedded parts 1, hanging plates 2, flexible joints 3, standard connecting pipes of different lengths 4, and support components 5, are transported to the site. The structural dimensions, specifications, and equipment of the components are checked to see if they meet the design requirements. If they do not meet the requirements, they need to be reprocessed or adjusted.

[0119] Then, after the internal reinforcement of the cap beam 8 is tied, the management personnel mark the specific installation position of the embedded part 1 by measuring and setting out lines, and install the embedded part 1 inside the cap beam 8. The embedded rod 12 is welded to the internal reinforcement of the cap beam 8 by welding, which effectively ensures the accurate position of the embedded part. The fixing plate 11 is slightly higher than the finished concrete surface of the cap beam 8 by 3-5cm. Then, the side template of the cap beam 8 is installed. After inspection and acceptance, the concrete pouring of the cap beam 8 is completed. At this point, the installation of the embedded part 1 is completed.

[0120] Next, at the construction site, the flexible head 3, connecting pipe 4, and support component 5 are effectively connected by bolt assembly 7 to form a support connection unit, which is kept for future use.

[0121] Finally, after the excavation depth of the foundation pit is 1.2-1.5m and the concrete of the capping beam 8 reaches the design strength, the support connection unit is installed. Before installation, the hanging plate 2 is installed on each embedded part 1 and effectively connected to the fixing plate 11 through the hanging lug 23. Then, professional operators operate the crane and workers cooperate to lift the support connection unit to the designated position and install it on the embedded part 1 and the capping beam 8 at the opposite end of the embedded part 1.

[0122] The specific usage steps are as follows:

[0123] First, apply some stress to the installed support connection unit using the jack 34 inside the movable head 3;

[0124] Then, the position and angle of the installed support connection unit are fine-tuned until they meet the installation and usage requirements.

[0125] Finally, continue to apply stress to the support connection unit and adjust the operation of the jack 34 by adjusting the display device 6. When the reading on the adjustment display device 6 reaches the design value, stop applying stress. Continue the installation in the above manner until the installed support connection units are completed, thus completing the foundation pit support work.

[0126] During the above-mentioned use, when the stress loss or increase reaches a certain value, the adjustment display device 6 will automatically alarm, requiring the stress to be reapplied or the deformation of the foundation pit to be checked and corresponding measures to be taken.

[0127] After use, it needs to be dismantled. The specific dismantling steps are as follows:

[0128] First, when the excavation backfill in the foundation pit reaches 1.2 to 1.5m from the top of the cap beam, the support connection unit is removed. Before removal, the stress applied by the previous support connection unit should be completely released. The support connection unit is lifted out of the foundation pit by professional operators operating a crane and with the help of manual labor.

[0129] Then, remove the hanging plate 2, disassemble the support connection unit into the flexible head 3, connecting pipe 4, and support assembly 5 through the bolt assembly 7, and transport them to the designated warehouse for storage and future use;

[0130] Next, the operators used an excavator equipped with a breaker head to break up the cap beam 8, recover the embedded parts 1 and the steel bars inside the cap beam 8, and clean up the construction waste and debris on site.

[0131] Finally, the operators used the extraction machine to remove the steel pipe piles and transport them to the designated material storage yard for future use.

[0132] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A combined steel support system for foundation pit support, horizontally supported between capping beams (8) on both sides of the foundation pit, characterized in that: include: Embedded part (1), embedded part (1) is pre-embedded and connected to the cap beam (8) on one side; Hanging plate (2), one end of the hanging plate (2) is hung above the embedded part (1); The flexible head (3) has one end attached to the hanging plate (2); Connecting pipe (4), which is detachably installed at the other end of the flexible head (3); Support component (5), one end of which is connected to the crown beam (8) on the other side, and the other end is detachably connected to the connecting pipe (4); Adjust the display device (6), which is connected to the flexor head (3) to adjust the length and pressure of the flexor head (3) to ensure that the connection between the support assembly (5) and the flexor head (3) and the crown beams (8) on both sides meets the threshold requirements set by the adjustment display device (6).

2. The combined steel support system for foundation pit support according to claim 1, characterized in that: The embedded part (1) includes a fixing plate (11) and several embedded rods (12) connected to one end of the fixing plate (11).

3. The combined steel support system for foundation pit support according to claim 1, characterized in that: The mounting plate (2) includes: The main body of the mounting plate (21) is in the shape of an "L" shape. Baffle (22) is symmetrically connected to both ends of the bracket body (21) at the included angle; The hanging ear (23) is connected to the upper end of the hanging plate body (21) on the non-baffle (22) end face to form a hanging groove; Among them, the cross-section of the ear (23) is "L" shaped.

4. The combined steel support system for foundation pit support according to claim 1, characterized in that: The movable head (3) includes: Outer sleeve (31), the closed end of the outer sleeve (31) is connected to the outer sleeve flange (32); The inner core (33) is fitted into the outer sleeve (31) at one end and connected to an abutment plate at the other end. Jack (34) is connected to the inner end of the outer sleeve near the closed end via base (35).

5. The combined steel support system for foundation pit support according to claim 4, characterized in that: One end of the inner core (33) is snapped into the outer sleeve (31), and the abutment plate at the other end overlaps on the hanging plate (2); The jack (34) is an intelligent jack, and the working end of the jack (34) is in contact with the end of the inner core (33) located inside the outer sleeve (31); Among them, the jack (34) is equipped with a sensor and an automatic compensation device.

6. The combined steel support system for foundation pit support according to claim 1 or 5, characterized in that: The adjustment display device (6) is an intelligent display screen, which is connected to the jack (34) through the outer sleeve (31) via a connecting line. The adjustment display device (6) is used to monitor the telescopic support status of the jack (34) in real time and adjust the support force according to the changes.

7. The combined steel support system for foundation pit support according to claim 1, characterized in that: The connecting pipe (4) includes a fixed pipe and connecting flanges connected to both ends of the fixed pipe. The two ends of the connecting pipe (4) are connected to the hinge (3) and the support assembly (5) by bolt assembly (7).

8. The combined steel support system for foundation pit support according to claim 1, characterized in that: The support component (5) includes: Support pipe (51), one end of support pipe (51) is connected to support pipe flange; Support plate (52) is connected to the other end of support tube (51).

9. The combined steel support system for foundation pit support according to claim 8, characterized in that: The support plate (52) has an overall "L" shape structure. The support tube (51) is connected to the non-open end of the support plate (52). The support tube (51) is also connected together by multiple connecting plates on its outer periphery.

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