A foundation pit retaining device for a steel structure in house construction

Abstract

The present invention discloses a foundation pit retaining device for a steel structure of a house construction, which relates to the field of construction equipment and includes a vertical baffle, a bottom plate and a support plate. The bottom of the support plate is fixedly connected to the bottom plate. A support assembly is arranged on one side of the vertical baffle. A secondary baffle is arranged at the bottom of the vertical baffle. An installation groove is formed inside the secondary baffle. A lifting assembly is arranged inside the installation groove. A movable assembly is arranged on one side of the bottom plate. A reinforcement mechanism is arranged between the movable assembly and the secondary baffle. In the present invention, through the vertical plate, the calibration hole, the second chute, the slider, the moving plate, the positioning rod, the limiting rod, the installation groove and the lifting assembly, the secondary baffle can be moved downward, so as to play a role of temporary support when the foundation pit is continuously excavated, and it is not necessary to carry out retaining after complete excavation to prevent the collapse from occurring in the case of lack of support during the excavation process.

Description

Technical Field

[0001] The invention relates to the technical field of construction equipment, in particular to a foundation pit enclosure device for a steel structure of a house construction. Background Art

[0002] Before building a house, it is necessary to excavate the foundation pit. The foundation pit is a soil pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. After the foundation pit is excavated, the surrounding device will be used to ensure the stability of the foundation pit and the safety of the work in the pit, and the displacement of the soil at the bottom and outside the pit must be controlled within a certain range to ensure the normal use of adjacent buildings and municipal facilities.

[0003] For example, the "foundation pit enclosure support plate structure" with Chinese patent number CN110904976B includes a main support plate and a secondary support plate. The main support plate abuts against the inner wall of the foundation pit, and the secondary support plate abuts against the outer wall of the wall. A number of support members are provided between the main support plate and the secondary support plate along the length direction of the main support plate; the support members include two supporting plates, one end of the two supporting plates passes through the main support plate through a first bolt and is driven into the soil of the inner wall of the foundation pit, and the other end passes through the secondary support plate through a second bolt and is driven into the wall. A rotation groove is provided on the opposite sides of the two supporting plates, and the two supporting plates are plugged into each other through the rotation groove. An extension plate is provided on each side of one of the supporting plates, and a pressure sensor is provided on the extension plate. The pressure sensor is in contact with the other supporting plate, and the pressure sensor transmits the pressure value to the monitoring room.

[0004] In the prior art, when excavating a foundation pit, the shape of the foundation pit is related to the house to be built. Because the retaining structure needs to abut against the wall of the foundation pit when it is installed, the foundation pit retaining device is installed after the foundation pit is excavated to a certain depth. The foundation pit retaining structure mainly bears the water pressure and soil pressure generated by the unloading of the foundation pit excavation, and transmits this pressure to the support. After the installation of the foundation pit retaining is completed, further excavation will be carried out;

[0005] However, generally, there is a lack of temporary support structure between the installation of the foundation pit and the further excavation of the foundation pit. Therefore, it is necessary to wait until the foundation pit is excavated to a certain depth and the depth matches the original foundation pit reinforcement height before the installation of the foundation pit reinforcement can continue. In this process, there is a lack of support structure to bear the water pressure and soil pressure generated by excavation unloading, which can easily lead to landslides in the foundation pit or collapse of the foundation pit reinforcement. Summary of the invention

[0006] The object of the present invention is to provide a foundation pit retaining device for steel structures of house construction, so as to solve the problem that after the general foundation pit retaining is installed, before the foundation pit is further excavated, there is a lack of temporary support structure. Therefore, it is necessary to wait until the foundation pit is excavated to a certain depth and the depth matches the original foundation pit retaining height before the foundation pit retaining can be installed. In this process, there is a lack of support structure to bear the water pressure and soil pressure generated by excavation unloading, which can easily lead to landslides in the foundation pit or collapse of the foundation pit retaining.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a foundation pit enclosure device for a steel structure of a house construction, comprising a vertical baffle, a bottom plate and a support plate, wherein the bottom of the support plate is fixedly connected to the bottom plate, a support assembly is arranged on one side of the vertical baffle, a secondary baffle is arranged on the bottom of the vertical baffle, a mounting groove is provided inside the secondary baffle, a lifting assembly is arranged inside the mounting groove, a movable assembly is arranged on one side of the bottom plate, and a reinforcement mechanism is arranged between the movable assembly and the secondary baffle;

[0008] The movable assembly includes a vertical plate, a movable plate is sleeved on the surface of the vertical plate, a second slide groove is provided on the surface of the vertical plate, a slider is slidably provided inside the second slide groove, one end of the slider is fixedly connected to the movable plate, calibration holes are provided on both sides of the vertical plate, positioning rods are provided on both sides of the movable plate, the positioning rods pass through the movable plate and the calibration holes in sequence, and one end of the positioning rods is plugged into the slider;

[0009] The reinforcement mechanism includes a first fixed plate and a second fixed plate, a first movable rod is fixedly connected to one side of the first fixed plate, a second movable rod is rotatably connected to one side of the first movable rod, one end of the second movable rod is rotatably connected to the second fixed plate, and a buffer assembly is arranged between the first fixed plate and the second fixed plate.

[0010] Preferably, the buffer assembly includes a third piston rod, a telescopic rod, a first movable block and a second movable block, linkage plates are provided on both sides of the telescopic rod, a first connecting head is provided at one end of the third piston rod, a second connecting head is provided at the other end of the third piston rod, and a third spring is sleeved on the surface of the third piston rod.

[0011] Preferably, the first movable block is movably connected to the first movable rod, the second movable block is movably connected to the second movable rod, a second piston rod is rotatably provided at the bottom of the first movable block, one end of the second piston rod is rotatably connected to the second movable rod, one end of the first fixed plate is fixedly connected to the movable plate, one side of the second fixed plate is fixedly connected to the auxiliary baffle, one end of the telescopic rod is connected to the first movable block, and the other end of the telescopic rod is connected to the second movable block, both ends of the linkage plate are rotatably connected to the first connecting head, and the first movable block and the second movable block are both rotatably connected to the second connecting head.

[0012] Preferably, the lifting assembly includes a first fixed frame and a second fixed frame, a scissor-type bracket is arranged between the first fixed frame and the second fixed frame, second limit rods are rotatably connected to both ends of the scissor-type bracket, movable grooves are opened on the surfaces of the first fixed frame and the second fixed frame, the second limit rod is slidably arranged inside the movable groove, the surfaces of the first fixed frame and the second fixed frame are fixedly connected to side plates, and the side plates are rotatably connected to the scissor-type brackets.

[0013] Preferably, first limiting rods are fixedly connected to the tops of both sides of the auxiliary baffle, first sliding grooves are opened on both sides of the vertical baffle, and the first limiting rods are slidably arranged in the first sliding grooves.

[0014] Preferably, the bottom of the vertical plate is fixedly connected to the base plate, a support frame is fixedly connected to one side of the vertical plate, one end of the support frame passes through the support plate, the bottom of the support frame is fixedly connected to the base plate, and a plurality of fixing screws are arranged on the surface of the base plate.

[0015] Preferably, the supporting assembly includes a connecting rod, a fixed rod, a first connecting block and a second connecting block, the first connecting block is fixedly connected to the vertical baffle, the second connecting block is fixedly connected to the vertical baffle, one end of the fixed rod is fixedly connected to the supporting plate, a first movable frame and a second movable frame are provided on the surface of the fixed rod, one end of the connecting rod is fixedly connected to the first movable frame, and the other end of the connecting rod is fixedly connected to the second movable frame.

[0016] Preferably, the upper end of the first movable frame is rotatably connected to a support rod, one end of the support rod is rotatably connected to the first connecting block, one side of the first movable frame is fixedly connected to a second spring, one end of the second spring is fixedly connected to the support plate.

[0017] Preferably, a first limiting groove is provided at one end of the fixed rod, and a second limiting groove is provided at the other end of the fixed rod, a first movable rod is slidably arranged inside the first limiting groove, a second movable rod is arranged inside the second limiting groove, the first movable rod is fixedly connected to the first movable frame, and the second movable rod is fixedly connected to the second movable frame.

[0018] Preferably, one end of the first connecting block is rotatably connected to a first piston rod, one end of the first piston rod is rotatably connected to the first movable frame, and first springs are sleeved on both end surfaces of the first piston rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, the movable auxiliary baffle can be moved downward by means of the vertical plate, the calibration hole, the second slide groove, the slider, the movable plate, the positioning rod, the limit rod, the installation groove and the lifting assembly, so as to play a role of temporary support when the foundation pit continues to be excavated, and there is no need to carry out enclosure after complete excavation to prevent collapse due to lack of support during the excavation process.

[0021] 2. In the present invention, the auxiliary baffle can be supported and reinforced by the first fixed plate, the first movable rod, the second fixed plate, the second movable rod, the second piston rod and the buffer assembly, so that the auxiliary baffle can remain stable during support and avoid tilting and collapse after being continuously subjected to water pressure and soil pressure from the foundation pit.

[0022] 3. In the present invention, the vertical baffle plate can be supported by the first connecting block, the support rod, the first piston rod, the first spring, the first movable frame, the fixed rod, the connecting rod, the second movable frame and the second connecting block. When supporting, it has a certain buffering effect to achieve the effect of protecting the vertical baffle plate, and can also reduce the pressure transmitted to the support plate, thereby also protecting the support plate and preventing it from being damaged and collapsed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of a foundation pit enclosure device for a steel structure of a house construction according to the present invention;

[0024] Figure 2 It is a partial structural schematic diagram of a foundation pit enclosure device for a steel structure of a house construction according to the present invention;

[0025] Figure 3 It is a structural schematic diagram of a lifting assembly of a foundation pit enclosure device for a steel structure of a house construction according to the present invention;

[0026] Figure 4 It is a structural schematic diagram of a reinforcement mechanism of a foundation pit enclosure device for a steel structure of a house construction according to the present invention;

[0027] Figure 5 It is a structural schematic diagram of a buffer assembly of a foundation pit enclosure device for a steel structure of a house construction according to the present invention;

[0028] Figure 6 It is a partial structural schematic diagram of a foundation pit enclosure device for a steel structure of a house construction according to the present invention;

[0029] Figure 7 It is a structural schematic diagram of a movable assembly of a foundation pit enclosure device for a steel structure of a house construction according to the present invention;

[0030] Figure 8 A schematic diagram of the internal structure of a support assembly of a foundation pit enclosure device for a steel structure of a house construction according to the present invention;

[0031] Fig. 9 It is a partial structural schematic diagram of a supporting assembly of a foundation pit enclosure device for a steel structure of a house construction according to the present invention.

[0032] In the figure: 1, vertical baffle; 11, first slide groove; 2, support plate; 3, support assembly; 31, first connecting block; 32, support rod; 33, first piston rod; 34, first spring; 35, first moving frame; 351, first moving rod; 352, second spring; 36, fixed rod; 361, first limiting groove; 362, second limiting groove; 37, connecting rod; 38, second moving frame; 381, second moving rod; 39, second connecting block; 4, auxiliary baffle; 41, first limiting rod; 42, mounting groove; 43, lifting assembly; 431, first fixed frame; 432, second limiting rod; 433, scissor bracket; 434, moving groove ;435, second fixed frame;436, side plate;5, reinforcement mechanism;51, first fixed plate;52, first movable rod;53, second fixed plate;54, second movable rod;55, second piston rod;56, buffer assembly;561, telescopic rod;562, first movable block;563, linkage plate;564, second movable block;565, first connecting head;566, third spring;567, third piston rod;568, second connecting head;6, bottom plate;7, fixing screw;8, movable assembly;81, vertical plate;82, calibration hole;83, second slide groove;84, slider;85, movable plate;86, positioning rod;87, support frame. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0034] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 As shown: a foundation pit enclosure device for a steel structure of a house construction, comprising a vertical baffle 1, a bottom plate 6 and a support plate 2, wherein the bottom of the support plate 2 is fixedly connected to the bottom plate 6, a support assembly 3 is arranged on one side of the vertical baffle 1, a secondary baffle 4 is arranged on the bottom of the vertical baffle 1, a mounting groove 42 is opened inside the secondary baffle 4, a lifting assembly 43 is arranged inside the mounting groove 42, a movable assembly 8 is arranged on one side of the bottom plate 6, and a reinforcement mechanism 5 is arranged between the movable assembly 8 and the secondary baffle 4;

[0035] The movable assembly 8 includes a vertical plate 81, a movable plate 85 is sleeved on the surface of the vertical plate 81, a second slide groove 83 is provided on the surface of the vertical plate 81, a slider 84 is slidably provided inside the second slide groove 83, one end of the slider 84 is fixedly connected to the movable plate 85, calibration holes 82 are provided on both sides of the vertical plate 81, and positioning rods 86 are provided on both sides of the movable plate 85. The positioning rods 86 pass through the movable plate 85 and the calibration holes 82 in sequence, and one end of the positioning rod 86 is plugged into the slider 84;

[0036] The reinforcement mechanism 5 includes a first fixed plate 51 and a second fixed plate 53. A first movable rod 52 is fixedly connected to one side of the first fixed plate 51. A second movable rod 54 is rotatably connected to one side of the first movable rod 52. One end of the second movable rod 54 is rotatably connected to the second fixed plate 53. A buffer assembly 56 is arranged between the first fixed plate 51 and the second fixed plate 53.

[0037] The lifting assembly 43 includes a first fixed frame 431 and a second fixed frame 435, a scissor-type bracket 433 is arranged between the first fixed frame 431 and the second fixed frame 435, one end of the scissor-type bracket 433 is rotatably connected to the second limiting rod 432, the surfaces of the first fixed frame 431 and the second fixed frame 435 are both provided with a movable groove 434, the second limiting rod 432 is slidably arranged inside the movable groove 434, the surfaces of the first fixed frame 431 and the second fixed frame 435 are both fixedly connected to the side plate 436, and the side plate 436 is rotatably connected to the scissor-type bracket 433.

[0038] In this embodiment, the movable plate 85 can slide on the surface of the vertical plate 81, and the slider 84 can also move inside the second slide groove 83, thereby adjusting the position of the reinforcement mechanism 5, so that the auxiliary baffle 4 can also play a reinforcing role when it moves. In addition, when the auxiliary baffle 4 moves, it will drive the scissor-type bracket 433 to start moving, thereby driving the second limiting rod 432 to slide inside the movable groove 434, and the scissor-type bracket 433 is rotatably connected with the limiting rod and the side plate 436, so as to facilitate the expansion of the scissor-type bracket 433, so that the auxiliary baffle 4 can play a guiding and limiting role when it moves. In addition, the first limiting rods 41 connected on both sides of the auxiliary baffle 4 will also slide inside the mounting groove 42 to prevent the auxiliary baffle 4 from tilting when it moves, so that the auxiliary baffle 4 can play a stable enclosure role when the foundation pit is excavated;

[0039] Finally, after the slider 84 moves inside the second slide groove 83, the positioning rod 86 first penetrates the movable plate 85 and then passes through the calibration hole 82 to achieve the effect of plugging in the slider 84, so that the position of the movable plate 85 is determined, so that when the auxiliary baffle plate 4 is subjected to soil pressure and water pressure, the reinforcement mechanism 5 can play a good supporting effect, and further prevent the auxiliary baffle plate 4 from tilting after being subjected to pressure, causing the foundation pit to collapse. Example

[0040] Figure 2 , Figure 4 , Figure 6 and Figure 7 As shown, the buffer assembly 56 includes a third piston rod 567, a telescopic rod 561, a first movable block 562 and a second movable block 564, linkage plates 563 are provided on both sides of the telescopic rod 561, a first connecting head 565 is provided at one end of the third piston rod 567, a second connecting head 568 is provided at the other end of the third piston rod 567, and a third spring 566 is sleeved on the surface of the third piston rod 567.

[0041] The first movable block 562 is movably connected to the first movable rod 52, the second movable block 564 is movably connected to the second movable rod 54, a second piston rod 55 is rotatably provided at the bottom of the first movable block 562, one end of the second piston rod 55 is rotatably connected to the second movable rod 54, one end of the first fixed plate 51 is fixedly connected to the movable plate 85, one side of the second fixed plate 53 is fixedly connected to the auxiliary baffle 4, one end of the telescopic rod 561 is connected to the first movable block 562, and the other end of the telescopic rod 561 is connected to the second movable block 564, both ends of the linkage plate 563 are rotatably connected with the first connecting head 565, and the first movable block 562 and the second movable block 564 are both rotatably connected to the second connecting head 568.

[0042] First limiting rods 41 are fixedly connected to the tops of both sides of the auxiliary baffle 4 , and first sliding grooves 11 are opened on both sides of the vertical baffle 1 , and the first limiting rods 41 are slidably arranged in the first sliding grooves 11 .

[0043] The bottom of the vertical plate 81 is fixedly connected to the base plate 6 , a support frame 87 is fixedly connected to one side of the vertical plate 81 , one end of the support frame 87 passes through the support plate 2 , the bottom of the support frame 87 is fixedly connected to the base plate 6 , and a plurality of fixing screws 7 are arranged on the surface of the base plate 6 .

[0044] In this embodiment, the auxiliary baffle 4 and the vertical baffle 1 are in contact with the foundation pit wall and are subjected to water pressure and soil pressure. At this time, when the auxiliary baffle 4 is displaced by the pressure, it will first transfer the force to the second fixed plate 53, and then the second movable rod 54 will be displaced, thereby driving the second piston rod 55 to perform telescopic movement. At this time, the friction force during the telescopic movement plays a certain damping effect, thereby offsetting the water pressure and soil pressure.

[0045] Then, when the second movable rod 54 moves, it will also drive the buffer assembly 56 to move. During this process, the first movable block 562 will first move together with the second movable rod 54, and then transmit the force received to multiple third piston rods 567. During the extension and retraction process of the third piston rod 567, the third spring 566 on the surface will be compressed, thereby absorbing the extrusion capacity. Because when the third piston rod 567 moves like a piston, friction will be generated, thereby consuming the energy temporarily stored by the third spring 566.

[0046] Finally, through the reinforcement mechanism 5 and the buffer assembly 56, the auxiliary baffle plate 4 can further offset the squeezing force when encountering water pressure and soil pressure, so as to prevent the force from being too large when transmitted to the support plate 2, causing the support plate 2 and the bottom plate 6 to be displaced or skewed, and the vertical baffle plate 1 and the auxiliary baffle plate 4 will also collapse and skew, affecting the protection of the foundation pit and the further excavation of the foundation pit. Example

[0047] according to Figure 8-9 As shown, the support assembly 3 includes a connecting rod 37, a fixed rod 36, a first connecting block 31 and a second connecting block 39, the first connecting block 31 is fixedly connected to the vertical baffle 1, the second connecting block 39 is fixedly connected to the vertical baffle 1, one end of the fixed rod 36 is fixedly connected to the support plate 2, and a first movable frame 35 and a second movable frame 38 are provided on the surface of the fixed rod 36, one end of the connecting rod 37 is fixedly connected to the first movable frame 35, and the other end of the connecting rod 37 is fixedly connected to the second movable frame 38.

[0048] The upper end of the first movable frame 35 is rotatably connected to the support rod 32 , one end of the support rod 32 is rotatably connected to the first connecting block 31 , one side of the first movable frame 35 is fixedly connected to the second spring 352 , one end of the second spring 352 is fixedly connected to the support plate 2 .

[0049] A first limiting groove 361 is provided at one end of the fixed rod 36, and a second limiting groove 362 is provided at the other end of the fixed rod 36. A first moving rod 351 is slidably arranged inside the first limiting groove 361, and a second moving rod 381 is arranged inside the second limiting groove 362. The first moving rod 351 is fixedly connected to the first moving frame 35, and the second moving rod 381 is fixedly connected to the second moving frame 38.

[0050] One end of the first connecting block 31 is rotatably connected to a first piston rod 33 , one end of the first piston rod 33 is rotatably connected to a first moving frame 35 , and first springs 34 are sleeved on both end surfaces of the first piston rod 33 .

[0051] In the present embodiment, firstly, because the vertical baffle plate 1 is located on the upper part of the auxiliary baffle plate 4, the vertical baffle plate 1 will not be subjected to a large water pressure. Therefore, the main pressure it bears is the soil pressure transmitted from the foundation pit wall. Then, the vertical baffle plate 1 will transmit the soil pressure to the first connecting block 31 and the second connecting block 39. Therefore, when the vertical baffle plate 1 is displaced laterally, it will push the first connecting block 31 and the second connecting block 39 to move, thereby causing the first movable frame 35 to squeeze the second spring 352. After being squeezed, the second spring 352 will store a part of the energy.

[0052] Next, when the first connecting block 31 is moving, the second moving rod 381 at the bottom end of the second moving frame 38 will move inside the second limiting groove 362, and the first moving frame 35 will also drive the first moving rod 351 to move, and the first moving rod 351 moves inside the first limiting groove 361 to ensure the stability of the first moving frame 35 and the second moving frame 38 when moving to avoid misalignment. In addition, the connecting rod 37 will also keep the first connecting block 31 and the second connecting block 39 moving synchronously;

[0053] When the vertical baffle plate 1 is skewed, the first connecting block 31 will be driven to move, which will drive the first piston rod 33 to extend and retract. The first springs 34 at both ends of the first piston rod 33 will store energy when they are squeezed and deformed, and the first piston rod 33 will generate friction when it is extended and retracted, so as to consume the energy stored in the first spring 34. Therefore, the soil pressure transmitted by the vertical baffle plate 1 is offset, which can improve the stability of the installation of the vertical baffle plate 1.

[0054] The usage and working principle of the device are as follows: First, because the vertical baffle plate 1 is located on the upper part of the auxiliary baffle plate 4, the vertical baffle plate 1 will not be subjected to a large water pressure. Therefore, the main pressure it bears is the soil pressure transmitted from the foundation pit wall. Then, the vertical baffle plate 1 will transmit the soil pressure to the first connecting block 31 and the second connecting block 39. Therefore, when the vertical baffle plate 1 is displaced laterally, it will push the first connecting block 31 and the second connecting block 39 to move, thereby causing the first movable frame 35 to squeeze the second spring 352. After being squeezed, the second spring 352 will store a part of the energy.

[0055] Then, when the first connecting block 31 is moving, the second moving rod 381 at the bottom of the second moving frame 38 will move inside the second limiting groove 362, and the first moving frame 35 will also drive the first moving rod 351 to move, and the first moving rod 351 will move inside the first limiting groove 361 to ensure the stability of the first moving frame 35 and the second moving frame 38 when moving, and avoid misalignment. In addition, the connecting rod 37 will also keep the first connecting block 31 and the second connecting block 39 moving synchronously. When the vertical baffle 1 is skewed, it will drive the first connecting block 31 to move, and will drive the first piston rod 33 to expand and contract. When the first springs 34 at both ends of the first piston rod 33 are squeezed and deformed, they will store energy, and the first piston rod 33 will generate friction when expanding and contracting, so as to consume the energy stored in the first spring 34. Therefore, the soil pressure transmitted by the vertical baffle 1 is offset, which can improve the stability of the installation of the vertical baffle 1.

[0056] The movable plate 85 can slide on the surface of the vertical plate 81, and the slider 84 can also move inside the second slide groove 83, thereby adjusting the position of the reinforcement mechanism 5, so that the auxiliary baffle 4 can also play a reinforcing role when it moves. In addition, when the auxiliary baffle 4 moves, it will drive the scissor-type bracket 433 to start moving, thereby driving the second limit rod 432 to slide inside the movable groove 434, and the scissor-type bracket 433 is rotatably connected to the limit rod and the side plate 436, which is convenient for unfolding the scissor-type bracket 433, so that the auxiliary baffle 4 can play a guiding and limiting role when it moves. In addition, the first limit rods 41 connected on both sides of the auxiliary baffle 4 will also slide inside the installation groove 42 to prevent the auxiliary baffle 4 from tilting when it moves, so that the auxiliary baffle 4 can play a stable enclosure role when the foundation pit is excavated.

[0057] The auxiliary baffle plate 4 and the vertical baffle plate 1 are in contact with the foundation pit wall and are subjected to water pressure and soil pressure. At this time, when the auxiliary baffle plate 4 is displaced by the pressure, it will first transfer the force to the second fixed plate 53, and then the second movable rod 54 will be displaced, thereby driving the second piston rod 55 to perform telescopic movement. At this time, the friction force during the telescopic movement plays a certain damping effect, thereby offsetting the water pressure and soil pressure.

[0058] Finally, when the second movable rod 54 moves, it will also drive the buffer assembly 56 to move. During this process, the first movable block 562 will first move together with the second movable rod 54, and then transmit the force received to multiple third piston rods 567. During the extension and retraction process of the third piston rod 567, the third spring 566 on the surface will be compressed, thereby absorbing the ability to squeeze. Because when the third piston rod 567 moves like a piston, friction will be generated, thereby consuming the energy temporarily stored by the third spring 566.

[0059] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A foundation pit retaining device for a steel structure of a house construction, comprising a vertical baffle (1), a bottom plate (6) and a support plate (2), the bottom of the support plate (2) is fixedly connected to the bottom plate (6), and a support assembly (3) is arranged on one side of the vertical baffle (1). Characterized in that: A secondary baffle (4) is arranged at the bottom of the vertical baffle (1), an installation groove (42) is formed inside the secondary baffle (4), a lifting assembly (43) is arranged inside the installation groove (42), a movable assembly (8) is arranged on one side of the bottom plate (6), and a reinforcement mechanism (5) is arranged between the movable assembly (8) and the secondary baffle (4). The movable assembly (8) includes a vertical plate (81), a movable plate (85) is sleeved on the surface of the vertical plate (81), a second sliding groove (83) is formed on the surface of the vertical plate (81), a slider (84) is slidably arranged inside the second sliding groove (83), one end of the slider (84) is fixedly connected to the movable plate (85), calibration holes (82) are formed on both sides of the vertical plate (81), positioning rods (86) are arranged on both sides of the movable plate (85), the positioning rods (86) sequentially penetrate through the movable plate (85) and the calibration holes (82), and one end of the positioning rod (86) is inserted into the slider (84). The reinforcement mechanism (5) includes a first fixing plate (51) and a second fixing plate (53), a first movable rod (52) is fixedly connected to one side of the first fixing plate (51), a second movable rod (54) is rotatably connected to one side of the first movable rod (52), one end of the second movable rod (54) is rotatably connected to the second fixing plate (53), and a buffer assembly (56) is arranged between the first fixing plate (51) and the second fixing plate (53). The buffer assembly (56) includes a third piston rod (567), a telescopic rod (561), a first movable block (562) and a second movable block (564). Linkage plates (563) are arranged on both sides of the telescopic rod (561). One end of the third piston rod (567) is provided with a first connector (565), and the other end of the third piston rod (567) is provided with a second connector (568). A third spring (566) is sleeved on the surface of the third piston rod (567). The first movable block (562) is movably connected to the first movable rod (52), and the second movable block (564) is movably connected to the second movable rod (54). A second piston rod (55) is rotatably arranged at the bottom of the first movable block (562), and one end of the second piston rod (55) is rotatably connected to the second movable rod (54). One end of the first fixing plate (51) is fixedly connected to the moving plate (85), and one side of the second fixing plate (53) is fixedly connected to the auxiliary baffle (4). One end of the telescopic rod (561) is connected to the first movable block (562), and the other end of the telescopic rod (561) is connected to the second movable block (564). Both ends of the linkage plate (563) are rotatably connected to the first connector (565), and both the first movable block (562) and the second movable block (564) are rotatably connected to the second connector (568).

2. The foundation pit retaining device for a steel structure in house construction according to claim 1, characterized in that: The lifting assembly (43) includes a first fixing frame (431) and a second fixing frame (435). A scissor bracket (433) is arranged between the first fixing frame (431) and the second fixing frame (435). Second limiting rods (432) are rotatably connected to both ends of the scissor bracket (433). Moving grooves (434) are formed on the surfaces of the first fixing frame (431) and the second fixing frame (435). The second limiting rods (432) are slidably arranged inside the moving grooves (434). Side plates (436) are fixedly connected to the surfaces of the first fixing frame (431) and the second fixing frame (435), and the side plates (436) are rotatably connected to the scissor bracket (433).

3. The foundation pit retaining device for a steel structure in house construction according to claim 1, characterized in that: First limiting rods (41) are fixedly connected to the tops of both sides of the auxiliary baffle (4). First sliding grooves (11) are formed on both sides of the vertical baffle (1). The first limiting rods (41) are slidably arranged inside the first sliding grooves (11).

4. The foundation pit retaining device for a steel structure in house construction according to claim 1, characterized in that: The bottom of the vertical plate (81) is fixedly connected to the bottom plate (6). A support frame (87) is fixedly connected to one side of the vertical plate (81). One end of the support frame (87) penetrates through the support plate (2), and the bottom of the support frame (87) is fixedly connected to the bottom plate (6). A plurality of fixing screws (7) are arranged on the surface of the bottom plate (6).

5. The foundation pit retaining device for a steel structure in house construction according to claim 1, It is characterized in that: The support component (3) includes a connecting rod (37), a fixed rod (36), a first connecting block (31) and a second connecting block (39). The first connecting block (31) is fixedly connected to the vertical baffle (1), and the second connecting block (39) is fixedly connected to the vertical baffle (1). One end of the fixed rod (36) is fixedly connected to the support plate (2). A first moving frame (35) and a second moving frame (38) are arranged on the surface of the fixed rod (36). One end of the connecting rod (37) is fixedly connected to the first moving frame (35), and the other end of the connecting rod (37) is fixedly connected to the second moving frame (38). The second moving frame (38) is connected to the second connecting block (39). A support rod (32) is rotatably connected to the upper end of the first moving frame (35), and one end of the support rod (32) is rotatably connected to the first connecting block (31).

6. A foundation pit retaining device for a steel structure in building construction according to claim 5, It is characterized in that: A second spring (352) is fixedly connected to one side of the first moving frame (35), and one end of the second spring (352) is fixedly connected to the support plate (2).

7. A foundation pit retaining device for a steel structure in building construction according to claim 6, It is characterized in that: A first limiting groove (361) is formed at one end of the fixed rod (36), and a second limiting groove (362) is formed at the other end of the fixed rod (36). A first moving rod (351) is slidably arranged inside the first limiting groove (361), and a second moving rod (381) is arranged inside the second limiting groove (362). The first moving rod (351) is fixedly connected to the first moving frame (35), and the second moving rod (381) is fixedly connected to the second moving frame (38).

8. A foundation pit retaining device for a steel structure in building construction according to claim 7, It is characterized in that: A first piston rod (33) is rotatably connected to one end of the first connecting block (31), one end of the first piston rod (33) is rotatably connected to the first moving frame (35), and first springs (34) are sleeved on the surfaces of both ends of the first piston rod (33).

Images