A horizontal thrust control device for civil engineering structure

Abstract

The present invention provides a horizontal thrust control device for a civil engineering structure, which can divide the force of a support system. The first guide rail part is fixed on the force-bearing plate; the fixing mechanism is fixed on the force-bearing plate; the second guide rail part is fixedly installed on the fixing mechanism; a guide slider is slidably installed on the first guide rail part; a linear slide rod is fixedly arranged in the second guide rail part, and a guide slider is slidably installed on the linear slide rod; one end of the connecting arm is connected to the guide slider of the first guide rail part, and the other end is connected to the guide slider of the second guide rail part; the first resistance spring is installed on the second guide rail part, and the first resistance spring is connected to the guide slider in the second guide rail part; the push block is connected to the reciprocating screw rod; the second resistance spring is connected to the push block; the push rod is slidably installed on the linear slide rod; the push rod is connected to the spiral groove; the active transmission wheel is rotatably installed on the second guide rail part; the reset spring is installed in the second guide rail part and connected to the push rod; the driven transmission wheel is fixed on the reciprocating screw rod, and the active transmission wheel and the driven transmission wheel are connected.

Description

Technical Field

[0001] The invention relates to a horizontal thrust control device for a civil engineering structure. Background Art

[0002] Foundation pit construction is a type of civil engineering structure system, mainly including foundation pit construction, ground foundation pit tunnel construction and subway foundation pit construction.

[0003] The Chinese patent with the publication number CN101806147A discloses an adaptive horizontal thrust control device and control method for civil engineering structures, characterized in that: a support block is connected to the corresponding two sides of the civil engineering structure being pushed, the support block has a narrow top surface and a wide bottom surface, one end is an inclined surface, and a trapezoidal space with a wide top surface and a narrow bottom surface is formed between the two support blocks; the side surface of the thrust rod is a trapezoidal shape with a wide top surface and a narrow bottom surface, the slopes of the inclined surfaces at both ends of the thrust rod are equal to the slopes of the corresponding support block inclined surfaces, the thrust rod is directly placed in the trapezoidal space, the two pairs of inclined surfaces are tightly matched, and the contact between the inclined surfaces converts the vertical force into horizontal thrust. The inclined surfaces of the two support blocks and the inclined surfaces at both ends of the thrust rod are each connected with a panel, and the friction coefficient of the panel is f≤0.05. The invention has a simple structure, is easy to construct, can automatically adapt to the deformation of the component, and keeps the horizontal thrust within the allowable range, thereby ensuring the safety of the structure.

[0004] The Chinese patent with publication number CN112502164A discloses an adaptive horizontal thrust control device for civil engineering structures, including a bottom plate, a first fixed plate is provided on the left and right sides of the bottom plate, the middle of the first fixed plate is slidably connected to the first guide rod, a top plate is provided at the end of the first guide rod away from the bottom plate, a first slide groove is provided on the front and rear sides of the upper surface of the bottom plate, the left and right sides of the first slide groove are slidably connected to the first sliding seat, a third fixed plate is provided on the side of the upper surface of the first sliding seat away from the center of the device, the middle of the third fixed plate is connected to the right side of the first guide rod, a second slide groove is provided on the side of the upper surface of the first sliding seat close to the center of the device, and the middle of the second slide groove is slidably connected to the second sliding seat. The invention is applicable to an adaptive horizontal thrust control device for civil engineering structures, which provides horizontal thrust through the gravity property of the counterweight, so that the output of the horizontal thrust of the entire device is more stable.

[0005] In the prior art including the above patents, due to the influence of natural weather and the interference of factors such as daily life and travel, the side walls of the foundation pit need to build a support system to ensure the state of the side walls of the foundation pit and avoid the collapse of the road surface or the side walls of the foundation pit. The support system is mainly composed of steel pipe supports, and the main consideration is the force problem of the foundation pit wall, but the force of the foundation pit wall on the support system is ignored. If the support system lacks effective force distribution, the support system will be overloaded and cause overall collapse. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a horizontal thrust control device for civil engineering structures with a reasonable structural design, which can divide the force of the support system.

[0007] The technical solution adopted by the present invention to solve the above-mentioned problems is: a horizontal thrust control device for a civil engineering structure, including a load-bearing plate, characterized in that it also includes a thrust control mechanism and a fixing mechanism; the thrust control mechanism includes a first guide rail portion, a second guide rail portion, a connecting arm component, a buffer damper and a linear slide rod; the first guide rail portion is fixed on the load-bearing plate; the fixing mechanism is fixed on the load-bearing plate; the second guide rail portion is fixedly installed on the fixing mechanism; the connecting arm component includes a guide slider and a connecting arm; the first guide rail portion is slidably installed with a guide slider; the second guide rail portion is fixedly provided with a linear slide rod, and a guide slider is slidably installed on the linear slide rod; one end of the connecting arm is connected to the guide slider of the first guide rail portion, and the other end is connected to the guide slider of the second guide rail portion; the buffer damper includes a first resistance spring, a reciprocating screw, a push block, a second resistance spring and a power switching assembly; the first resistance The spring is installed on the second guide rail part, and the first resistance spring is connected to the guide sliding block in the second guide rail part; an auxiliary cabin is installed at the bottom of the second guide rail part; the reciprocating screw is rotatably arranged in the auxiliary cabin; the push block is horizontally slidably arranged in the auxiliary cabin, and the push block is connected to the reciprocating screw; the second resistance spring is connected to the push block; the power switching assembly includes a synchronous wheel, a push rod, a reset spring and a transmission wheel group; the push rod is slidably installed on the linear slide rod in the second guide rail part, and the linear slide rod is provided with a spiral groove, and the push rod is connected to the spiral groove; the transmission wheel group includes an active transmission wheel and a driven transmission wheel, and the active transmission wheel is rotatably installed on the second guide rail part; the synchronous wheel is fixed to the push rod, and the synchronous wheel and the active transmission wheel are in clutch cooperation; the reset spring is installed in the second guide rail part and is connected to the push rod; the driven transmission wheel is fixed on the reciprocating screw, and the active transmission wheel and the driven transmission wheel are connected.

[0008] The thrust control mechanism described in the present invention comprises three groups, one of which is arranged in a vertical direction, and the other two groups are arranged in left and right horizontal directions.

[0009] The fixing mechanism described in the present invention comprises a mounting seat, a middle mounting plate and a side mounting plate; the mounting seat is fixed on the force-bearing plate; the middle mounting plate is fixedly mounted on the mounting seat; and the side mounting plates are fixedly mounted on both sides of the middle mounting plate.

[0010] The second guide rail parts of the two thrust control mechanisms of the present invention are respectively fixedly mounted on the side mounting plates on the left and right sides of the mounting seat, and the second guide rail part of the last thrust control mechanism is fixedly mounted on the top of the middle mounting plate.

[0011] The first guide rail parts of the three groups of thrust control mechanisms of the present invention are arranged in a vertical direction in one group, and the first guide rail parts of the other two groups are arranged in left and right horizontal directions.

[0012] The first guide rail part and the second guide rail part of the present invention are both provided with compartments matching the order of magnitude of the connecting arm parts, and the guide sliding block of each connecting arm part is located in the corresponding compartment.

[0013] The connecting arm described in the present invention has connecting parts hinged at both ends. The connecting part at one end of the connecting arm is rotatably mounted on the guide slider of the first guide rail part, and the connecting part at the other end is rotatably mounted on the guide slider of the second guide rail part.

[0014] The buffer damper described in the present invention also includes an air column assembly, through which the push block is connected to the reciprocating screw rod, and the air column assembly includes an air column inner sleeve, a piston block and an air column outer sleeve; the air column inner sleeve is fixedly installed in the attached cabin, and the reciprocating screw rod is rotatably installed in the air column inner sleeve; the piston block is slidably installed in the air column inner sleeve, and the piston block is connected to the reciprocating screw rod; the air column outer sleeve sliding sleeve is arranged on the air column inner sleeve; the push block is fixedly installed on the air column outer sleeve.

[0015] The load-bearing plate and the second guide rail portion of the present invention are perpendicular to each other.

[0016] The active transmission wheel and the driven transmission wheel described in the present invention are gears or pulleys.

[0017] Compared with the prior art, the present invention has the following advantages and effects: through the connecting arm component, the load-bearing plate is poured onto the buffer damper when it is subjected to the force of the side wall of the foundation pit, thereby applying a damping force to the load-bearing plate, achieving the purpose of force distribution for the support system, thereby avoiding the lack of force release or force distribution in the support system under the rigid structure, which causes structural collapse due to overload. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0019] Figure 2 The figure is a schematic diagram of the explosion structure of an embodiment of the present invention.

[0020] Figure 3 It is a schematic structural diagram of the assembly of the second guide rail portion and the fixing mechanism according to an embodiment of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the assembly of the load-bearing plate and the first guide rail portion according to an embodiment of the present invention.

[0022] Figure 5 is a schematic cross-sectional structural diagram of the second guide rail portion of an embodiment of the present invention;

[0023] Figure 6 It is a schematic cross-sectional structural diagram of the gas column assembly part of an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0025] The embodiment of the present invention comprises a force-bearing plate 1, a thrust control mechanism and a fixing mechanism.

[0026] The load-bearing plate 1 abuts against the side wall of the foundation pit.

[0027] The thrust control mechanism includes a first guide rail portion 11, a second guide rail portion 21, a connecting arm component 3, a buffer damper 4 and a linear slide rod 42. The thrust control mechanism is a plurality of groups, and the arrangement of the plurality of groups of thrust control mechanisms can be a cross arrangement, a three-point arrangement or a cross-shaped arrangement, and any number of points on the circumference can be connected. In this embodiment, the thrust control mechanism adopts a three-point arrangement, that is, there are three groups of thrust control mechanisms, and the three groups of thrust control mechanisms adopt a three-point arrangement, one of which is arranged in a vertical direction, and the other two groups are arranged in left and right horizontal directions, and the two groups of thrust control mechanisms are left-right symmetrical about the thrust control mechanism arranged in the vertical direction.

[0028] The first guide rail 11 is fixed on the force bearing plate 1. The first guide rails 11 of the three thrust control mechanisms are arranged in a vertical direction in one group, and the first guide rails 11 of the other two groups are arranged in left and right horizontal directions, and the first guide rails 11 of the two groups are combined into a whole.

[0029] The fixing mechanism is fixed on the load-bearing plate 1, and includes a mounting seat 22, a middle mounting plate 23, and a side mounting plate 24. The mounting seat 22 is inserted into the joint of the first guide rail portion 11 arranged in the vertical direction and the first guide rail portion 11 arranged in the horizontal direction, and is fixed to the load-bearing plate 1 by bolts. The middle mounting plate 23 is fixedly mounted on the mounting seat 22 by bolts. The side mounting plates 24 are fixedly mounted on both sides of the middle mounting plate 23 by bolts. The middle mounting plate 23 is made of I-beam steel, and the side mounting plates 24 are made of channel steel.

[0030] The load-bearing plate 1 and the second guide rail portion 21 are assembled and are perpendicular to each other.

[0031] The second rail parts 21 of the two thrust control mechanisms are respectively fixedly mounted on the side mounting plates 24 on the left and right sides of the mounting seat 22, and the second rail parts 21 of the last thrust control mechanism are fixedly mounted on the top of the middle mounting plate 23, thereby completing the final assembly. The assembly in the above embodiments is achieved by bolts to achieve the purpose of disassembly.

[0032] The second rail section 21 is connected with a connecting arm component 3 that pushes against the force-bearing plate 1 to keep it in a vertical relationship, and the force-bearing plate 1 is connected to the second rail section 21 through the connecting arm component 3. The connecting arm component 3 includes a guide slider 31, a connecting arm 32 and a connecting portion 33. A linear slide rod 42 is fixedly arranged in the second rail section 21 and the first rail section 11, and the guide slider 31 is slidably arranged on the linear slide rod 42, so that the guide slider 31 is slidably installed on the first rail section 11 and the second rail section 21. The connecting portion 33 is hinged at both ends of the connecting arm 32, and the connecting portion 33 at one end of the connecting arm 32 is circumferentially mounted on the guide slider 31 of the first rail section 11, and the connecting portion 33 at the other end is circumferentially mounted on the guide slider 31 of the second rail section 21, so that one end of the connecting arm 32 is connected to the guide slider 31 of the first rail section 11, and the other end is connected to the guide slider 31 of the second rail section 21. Each set of thrust control mechanisms is provided with at least three connecting arm components 3, so as to maximize the load capacity of the damping and buffering support system; the first guide rail portion 11 and the second guide rail portion 21 are both provided with compartments matching the order of magnitude of the connecting arm components 3, and the guide sliding block 31 of each connecting arm component 3 is located in the corresponding compartment.

[0033] The buffer damper 4 is mounted on the second rail portion 21 and connected to the guide slider 31 in the second rail portion 21, and is used to cooperate with the connecting arm component 3 to damp the force on the load-bearing plate 1. The load-bearing plate 1 is subjected to the force of the side wall of the foundation pit and is poured onto the buffer damper 4 through the connecting arm component 3. Because of the limit of the buffer damper 4, the position of the guide slider 31 on the first rail portion 11 can also be determined.

[0034] In this embodiment, the buffer damper 4 includes a first resistance spring 41, a reciprocating screw rod 43, a push block 44, a second resistance spring 45, a power switching assembly 7 and a gas column assembly.

[0035] The first resistance spring 41 is installed on the second rail portion 21, and is connected to the guide slider 31 in the second rail portion 21, providing a damping force to the guide slider 31, and when not under force, the first resistance spring 41 keeps the guide slider 31 at the end of the compartment. When the force plate 1 is subjected to a force, if the force causes the connecting arm component 3 to be subjected to a force, the first resistance spring 41 is deformed as the guide slider 31 slides and squeezes, thereby providing a damping force.

[0036] The bottom of the second guide rail portion 21 is provided with an attachment compartment 25. The push block 44, the second stop spring 45 and the reciprocating screw rod 43 are all assembled in the attachment compartment 25, wherein the reciprocating screw rod 43 is rotatably arranged in the attachment compartment 25, and the push block 44 is horizontally slidably arranged in the attachment compartment 25, and the push block 44 is connected to the reciprocating screw rod 43, and the second stop spring 45 is connected to the push block 44; when the reciprocating screw rod 43 is driven to rotate, the push block 44 is driven to move, and the second stop spring 45 is pressed.

[0037] The power switching assembly 7 can make the guide slider 31 move to a predetermined position, so that the horizontal movement is converted into the circumferential rotation of the reciprocating screw 43. The power switching assembly 7 includes a synchronous wheel 71, a push rod 72, a return spring 73 and a transmission wheel group 8.

[0038] The push rod 72 is slidably mounted on the linear slide rod 42 of the second guide rail part 21. A spiral groove is arranged on the rod surface of the linear slide rod 42 of the second guide rail part 21. The push rod 72 is connected to the spiral groove. When the push rod 72 moves, it rotates under the guidance of the spiral groove. The push rod 72 cooperates with the guide slider 31 in the second guide rail part 21. The transmission wheel group 8 includes an active transmission wheel 81 and a driven transmission wheel 82. The active transmission wheel 81 is rotatably mounted on the side wall of the compartment of the second guide rail part 21 and is coaxial with the linear slide rod 42. The synchronous wheel 71 is inserted into the end of the linear slide rod 42, and the shaft of the synchronous wheel 71 is fixed to the push rod 72. The synchronous wheel 71 and the active transmission wheel 81 are clutched. The reset spring 73 is installed in the second guide rail part 21 and connected to the push rod 72. The driven transmission wheel 82 is fixed on the reciprocating screw 43, and the active transmission wheel 81 and the driven transmission wheel 82 are connected. The active transmission wheel 81 and the driven transmission wheel 82 are gears or pulleys.

[0039] In short, when the first resistance spring 41 is deformed as the guide slider 31 slides and squeezes, the guide slider 31 in the second guide rail part 21 slides and pushes the push rod 72 to move, and the synchronous synchronous wheel 71 moves with it, and finally inserts into the active transmission wheel 81, and the synchronous wheel 71 engages with the active transmission wheel 81. As the push rod 72 rotates during the movement, the active transmission wheel 81 is driven to rotate, and the reset spring 73 is deformed during this period; when the active transmission wheel 81 rotates, the synchronous reciprocating screw 43 rotates with it, and the push block 44 at this time moves under the drive of the reciprocating screw 43 and squeezes the second resistance spring 45 to deform accordingly. In addition, when the force is removed, when the guide slider 31 moves toward the starting direction, the first resistance spring 41 gradually recovers, and under the action of the reset spring 73, the synchronous wheel 71 is separated from the active transmission wheel 81. Due to the loss of the force, the deformed second resistance spring 45 will push the push block 44 to reset. When the reset spring 73 is in the default state, the push end of the push rod 72 is located at half of the stroke of the guide slider 31.

[0040] In the above embodiment, a second resistance spring 45 is added to the original first resistance spring 41, so that when the guide sliding block 31 moves under the force of the force-bearing plate 1, the first resistance spring 41 provides a primary damping force, and as the deformation occurs, the second resistance spring 45 is subjected to force to provide a secondary damping force. The two damping forces are superimposed to increase the damping effect, and at the same time, it also prevents the first resistance spring 41 from collapsing due to deformation overload, that is, it has a protective effect, and at the same time, the force-bearing plate 1 has at least double damping effect protection.

[0041] The push block 44 is connected to the reciprocating screw rod 43 through an air column assembly, and the air column assembly includes an air column inner sleeve 90, a piston block 91 and an air column outer sleeve 92.

[0042] The air column outer sleeve 92 and the air column inner sleeve 90 are both provided with a closed inner space. The air column outer sleeve 92 is slidably mounted on the air column inner sleeve 90. The air column outer sleeve 92 and the piston block 91 have the same moving path. The closed inner space of the air column outer sleeve 92 is connected with the closed inner space of the air column inner sleeve 90. The air column inner sleeve 90 is fixedly installed in the auxiliary cabin 25, and the reciprocating screw 43 is rotatably installed in the closed inner space of the air column inner sleeve 90 through a bearing. The piston block 91 is slidably installed in the closed inner space of the air column inner sleeve 90, and the piston block 91 is connected to the reciprocating screw 43. The piston block 91 moves in the air column inner sleeve 90 through the rotation of the reciprocating screw 43. The piston block 91 and the guide slider 31 have the same moving path. The push block 44 is fixedly installed on the air column outer sleeve 92.

[0043] The air column assembly adopts the form and principle of an air column. When the reciprocating screw 43 rotates, the piston block 91 moves toward the side where the driven transmission wheel 82 is located, compressing the air on this side. The air density in the enclosed inner space of the air column jacket 92 and the enclosed inner space of the air column inner sleeve 90 changes. The air density on both sides of the piston block 91 is inconsistent. The outside air pushes the air column jacket 92 to move toward the side where the driven transmission wheel 82 is located. At this time, the push block 44 moves under the drive of the air column jacket 92 and squeezes the second resistance spring 45 to deform accordingly. At the same time, as the piston block 91 moves, the air density that the piston block 91 can compress becomes larger and larger, and the damping force increases. Based on this, in conjunction with the second resistance spring 45, the secondary damping force provided is further optimized.

[0044] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A horizontal thrust control device for a civil structure, comprising a load-bearing plate, characterized in that: It also includes a thrust control mechanism and a fixing mechanism; the thrust control mechanism includes a first guide rail portion, a second guide rail portion, a connecting arm component, a buffer damper and a linear slide rod; the first guide rail portion is fixed on the force-bearing plate; the fixing mechanism is fixed on the force-bearing plate; the second guide rail portion is fixedly installed on the fixing mechanism; the connecting arm component includes a guide slider and a connecting arm; the first guide rail portion is slidably installed with a guide slider; a linear slide rod is fixedly arranged in the second guide rail portion, and a guide slider is slidably installed on the linear slide rod; one end of the connecting arm is connected to the guide slider of the first guide rail portion, and the other end is connected to the guide slider of the second guide rail portion; the buffer damper includes a first resistance spring, a reciprocating screw, a push block, a second resistance spring and a power switching assembly; the first resistance spring is installed on the second guide rail portion, and the first resistance spring is connected to the guide slider in the second guide rail portion; an auxiliary cabin is installed at the bottom of the second guide rail portion; the reciprocating screw is rotatably arranged in the auxiliary cabin The cam is provided with a plurality of gears, and the plurality of gears are connected to each other, and the plurality of gears are connected to each other via a plurality of clutches, and the plurality of gears are connected to each other via a clutch.

2. The horizontal thrust control device for civil engineering structure according to claim 1, characterized in that: The fixing mechanism comprises a mounting seat, a middle mounting plate and a side mounting plate; the mounting seat is fixed on the force-bearing plate; the middle mounting plate is fixedly mounted on the mounting seat; and the side mounting plates are fixedly mounted on both sides of the middle mounting plate.

3. The horizontal thrust control device for civil engineering structure according to claim 2, characterized in that: The second guide rail parts of the two thrust control mechanisms are respectively fixedly mounted on the side mounting plates on the left and right sides of the mounting seat, and the second guide rail part of the last thrust control mechanism is fixedly mounted on the top of the middle mounting plate.

4. The horizontal thrust control device for civil engineering structure according to claim 1, characterized in that: The first guide rail parts of the three groups of thrust control mechanisms are arranged in a vertical direction in one group, and the first guide rail parts of the other two groups are arranged in left and right horizontal directions.

5. The horizontal thrust control device for civil engineering structure according to claim 1, characterized in that: The first guide rail portion and the second guide rail portion are both provided with compartments matching the order of magnitude of the connecting arm components, and the guide sliding block of each connecting arm component is located in the corresponding compartment.

6. The horizontal thrust control device for civil engineering structure according to claim 1, characterized in that: Both ends of the connecting arm are hinged with connecting parts. The connecting part at one end of the connecting arm is circumferentially rotatably mounted on the guide slider of the first guide rail part, and the connecting part at the other end is circumferentially rotatably mounted on the guide slider of the second guide rail part.

7. The horizontal thrust control device for civil engineering structure according to claim 1, characterized in that: The buffer damper also includes an air column assembly, through which the push block is connected to the reciprocating screw rod, and the air column assembly includes an air column inner sleeve, a piston block and an air column outer sleeve; the air column inner sleeve is fixedly installed in the attached cabin, and the reciprocating screw rod is rotatably installed in the air column inner sleeve; the piston block is slidably installed in the air column inner sleeve, and the piston block is connected to the reciprocating screw rod; the air column outer sleeve sliding sleeve is arranged on the air column inner sleeve; the push block is fixedly installed on the air column outer sleeve.

8. The horizontal thrust control device for civil engineering structure according to claim 1, characterized in that: The active transmission wheel and the driven transmission wheel are gears or pulleys.

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