Fabricated foundation pit trestle support capable of measuring force

Abstract

The utility model relates to an assembly type foundation pit trestle support capable of measuring force, comprising a force measuring structure which is supported on a foundation pit concrete support beam and is used for measuring a load transmitted on an assembly type foundation pit trestle above the foundation pit concrete support beam; the hinged support structure is supported on the force measuring structure, supports the assembly type foundation pit trestle and transmits the load transmitted on the assembly type foundation pit trestle to the force measuring structure for measurement; the fixing structures are supported on the upper side and the lower side of a foundation pit concrete supporting beam, and the force measuring structure is fixed to the fixing structures located on the upper side of the foundation pit concrete supporting beam. The force measuring structure is arranged in the trestle support and can replace a wagon balance structure to measure the weight of a construction vehicle, so that wagon balance arrangement in a construction site is avoided, the problem of temporary facility arrangement in a narrow construction site can be solved, and the construction cost is reduced.

Description

Measurable force prefabricated foundation pit trestle support Technical Field

[0001] This utility model relates to the field of foundation pit engineering technology, and in particular to a prefabricated foundation pit trestle support with measurable force. Background Technology

[0002] In foundation pit construction, the limited site space presents challenges for the layout of temporary facilities such as on-site transportation channels and weighbridges. Temporary trestle bridges are often required at foundation pit construction sites as on-site transportation channels, and steel trestle bridges are widely used in foundation pit projects due to their high reusability. Currently, traditional steel trestle bridge supports are only used to connect the trestle structure to the concrete support beams of the foundation pit, serving to fix the trestle's position and adjust its deformation. Furthermore, traditional steel trestle bridge supports are mainly installed using embedded parts within the concrete support beams, which cannot be recycled and reused. Clearly, traditional steel trestle bridge supports suffer from limited functionality and low reusability, which is detrimental to cost control in foundation pit projects with temporary characteristics. In existing steel trestle bridge support technologies, such as the patent with publication number 201920977508.5, a steel structure trestle bridge sliding support is disclosed. This support simplifies the structure of traditional supports and reduces the support installation space. However, the support structure still needs to be processed and manufactured in conjunction with the dimensions of the foundation pit support beam. It is difficult to recycle and reuse it in other projects, resulting in a low secondary utilization rate.

[0003] Therefore, there is an urgent need to develop a prefabricated foundation pit trestle support that can measure force. By using a force measuring device to obtain the vehicle load passing over the bridge deck, the steel trestle can be equipped with the function of a weighbridge. At the same time, the prefabricated installation of the support structure can achieve efficient reuse of the support structure, so as to solve the practical needs in the field of foundation pit engineering. Summary of the Invention

[0004] The purpose of this utility model is to solve at least one technical problem in the background art and to provide a prefabricated foundation pit trestle support with measurable force.

[0005] To achieve the above objectives, this utility model provides a prefabricated foundation pit trestle support with measurable force, comprising:

[0006] The force-measuring structure is supported on the concrete support beam of the foundation pit and measures the load transmitted on the prefabricated foundation pit trestle above the concrete support beam of the foundation pit.

[0007] A hinged support structure is provided on the force measuring structure and supports the prefabricated foundation pit trestle, transferring the load transmitted on the prefabricated foundation pit trestle to the force measuring structure for measurement.

[0008] A fixed structure is provided, which is supported on the upper and lower sides of the concrete support beam of the foundation pit. The force measuring structure is fixed on the fixed structure located on the upper side of the concrete support beam of the foundation pit.

[0009] According to one aspect of the present invention, the force measuring structure includes: two U-shaped clamps spaced apart and supported on the fixed structure, a force measuring beam, an anti-blocking block, a pull wire displacement sensor, and a pull wire;

[0010] Each of the U-shaped clamps has a hinged cylinder at its opening;

[0011] The two ends of the force-measuring beam are respectively supported on the hinged cylinders of two U-shaped clamps;

[0012] Two anti-blocking blocks are respectively set on the outside of the two U-shaped clamps to limit the force measuring beam;

[0013] One end of the pull wire is installed at the center of the bottom surface of the force measuring beam;

[0014] The wire displacement sensor is installed at the other end of the wire to ensure that the wire is vertically taut when not under stress.

[0015] According to one aspect of the present invention, the hinge support structure includes: two hinge support members, a hinge support rotating member, a hinge support platform, and a pin.

[0016] The two hinged support members are supported on the upper surface of the force measuring beam at intervals, and each of the two hinged support members is provided with a first through hole;

[0017] The hinge support rotating component is provided with a second through hole;

[0018] The first through hole and the second through hole are arranged coaxially, and the pin passes through each of the first through hole and the second through hole and is then locked.

[0019] The hinge support rotating component is rotatably mounted on a pin between the two hinge support components.

[0020] The hinge support platform is fixedly installed on the top of the hinge support rotating component.

[0021] According to one aspect of the present invention, the hinge support rotating component is composed of a plurality of rotating plates arranged side by side at intervals, and each of the rotating plates is provided with a second through hole.

[0022] According to one aspect of the present invention, the fixing structure includes: a first fixing component, a second fixing component, and a connecting rod assembly;

[0023] The first fixing component and the second fixing component are symmetrically supported on the upper and lower sides of the concrete support beam of the foundation pit;

[0024] The connecting rod assembly connects the first fixing component and the second fixing component on both sides of the circumferential direction of the foundation pit concrete support beam, and the first fixing component, the second fixing component and the connecting rod assembly work together to tightly hold the foundation pit concrete support beam.

[0025] According to one aspect of the present invention, both the first fixing component and the second fixing component include: a base plate, an angle steel, a lifting lug, an adjusting rod, a tapered joint, and an adjusting driver;

[0026] The base plate is supported on the concrete support beam of the foundation pit;

[0027] The angle steel is supported on one side of one surface of the base plate;

[0028] The two lifting lugs are supported at intervals on the other side of one surface of the base plate; each lifting lug is provided with a third through hole;

[0029] The two adjusting rods pass through the third through holes respectively, and after passing through, one end near the concrete support beam of the foundation pit is screwed to the tapered joint;

[0030] The tapered joint abuts against the outer wall of the concrete support beam of the foundation pit;

[0031] The adjustment actuator is located on the outer wall of the other end of the adjustment rod away from the concrete support beam of the foundation pit.

[0032] According to one aspect of the present invention, the connecting rod assembly includes: a connecting rod and a fastening nut;

[0033] The two ends of the plurality of connecting rods pass through the upper and lower base plates respectively, and the two ends of each connecting rod are provided with external threads;

[0034] The fastening nuts are screwed to both ends of each connecting rod on one side of the base plate, thereby securing the base plate supported on the upper and lower sides of the concrete support beam of the foundation pit.

[0035] According to the present invention, the trestle support provided by the present invention has a force measuring structure inside, which can replace the weighbridge structure to measure the weight of construction vehicles, thereby avoiding the need for a weighbridge in the construction site, solving the problem of temporary facility layout in a narrow construction site, and reducing construction costs; the trestle support of the present invention is a fully prefabricated structure, which can adapt to support beams in foundation pits of different sizes, is easy to install and disassemble, and can be reused multiple times.

[0036] According to the present invention, the wire displacement sensor is fixed on the bottom plate on the upper side of the concrete support beam of the foundation pit. The end of the wire displacement sensor is fixed at the center of the bottom of the force measuring beam. The wire of the wire displacement sensor can transmit the bending deformation of the measuring beam to the wire displacement sensor. The wire displacement sensor converts the bending deformation of the force measuring beam into an electrical signal. After the electrical signal is collected and processed, it is converted into vehicle load information, realizing the real-time measurement of vehicle load.

[0037] According to the present invention, the structural arrangement of the hinge support structure can ensure the overall support stability and rotational flexibility of the support.

[0038] According to the present invention, all components are connected by welding or bolts, eliminating the need to pre-embed connectors in the concrete support beam of the foundation pit. This makes installation and disassembly simple, and the recycling rate is high, which can further improve the construction efficiency of the trestle support and reduce construction costs.

[0039] This invention can use a force-measuring structure to obtain the vehicle load passing over the trestle in real time, avoiding the need for a weighbridge in foundation pit construction, solving the problem of temporary facility layout in narrow construction sites, and reducing construction costs. Attached Figure Description

[0040] Figure 1 schematically shows a perspective view of a force-measurable prefabricated foundation pit trestle support according to one embodiment of the present invention.

[0041] Figure 2 schematically shows the front view of a measurable force-measurable prefabricated foundation pit trestle support according to one embodiment of the present invention;

[0042] Figure 3 schematically shows a perspective view of a force measuring structure according to one embodiment of the present invention;

[0043] Figure 4 schematically shows a perspective view of a U-shaped clamping block according to one embodiment of the present invention;

[0044] Figure 5 schematically shows a perspective view of a first fixing component and a second fixing component according to one embodiment of the present invention;

[0045] Figure 6 is a perspective view schematically showing the connection structure of the adjusting rod, adjusting driver and tapered joint according to one embodiment of the present invention. Detailed Implementation

[0046] The present invention will now be discussed with reference to exemplary embodiments. It should be understood that the described embodiments are merely intended to enable those skilled in the art to better understand and thus implement the present invention, and are not intended to imply any limitation on the scope of the present invention.

[0047] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment".

[0048] Figure 1 schematically shows a perspective view of a force-measurable prefabricated foundation pit trestle support according to one embodiment of the present invention; Figure 2 schematically shows a front view of a force-measurable prefabricated foundation pit trestle support according to one embodiment of the present invention. As shown in Figures 1 and 2, in this embodiment, the force-measurable prefabricated foundation pit trestle support includes:

[0049] The force measuring structure is supported on the concrete support beam 1 of the foundation pit to measure the load transmitted on the prefabricated foundation pit trestle above the concrete support beam 1 of the foundation pit.

[0050] The hinged support structure is supported on the force measuring structure and supports the prefabricated foundation pit trestle, transferring the load transmitted on the prefabricated foundation pit trestle to the force measuring structure for measurement.

[0051] A fixed structure is provided, which is supported on the upper and lower sides of the concrete support beam of the foundation pit. The force measuring structure is fixed on the fixed structure located on the upper side of the concrete support beam of the foundation pit.

[0052] Further, Figure 3 schematically shows a perspective view of a force-measuring structure according to one embodiment of the present invention. Figure 4 schematically shows a perspective view of a U-shaped clamping block according to one embodiment of the present invention. As shown in Figures 1-3, in this embodiment, the force-measuring structure includes: two U-shaped clamping blocks 10 spaced apart and supported on a fixed structure, a force-measuring crossbeam 11, an anti-slip block 5, a pull-wire displacement sensor 17, and a pull wire 19;

[0053] Each U-shaped clamp is supported by a hinged cylinder 16 at its opening;

[0054] The two ends of the force-measuring beam are respectively supported on the hinged cylinders of two U-shaped clamps;

[0055] Two anti-blocking blocks are respectively set on the outside of the two U-shaped clamps to limit the force measuring beam;

[0056] One end of the pull wire is installed at the center of the bottom surface of the force-measuring beam;

[0057] A wire displacement sensor is installed at the other end of the wire to keep the wire vertically taut when it is not under stress.

[0058] Further, as shown in Figures 1-3, in this embodiment, the hinge support structure includes: two hinge support members 7, a hinge support rotating member 12, a hinge support platform 13, and a pin 14.

[0059] Two hinged support members are supported on the upper surface of the force measuring beam at intervals, and each hinged support member is provided with a first through hole.

[0060] The hinge support rotating component is provided with a second through hole;

[0061] The first through hole and the second through hole are arranged coaxially, and the pin is locked after passing through each of the first through hole and the second through hole;

[0062] The hinge support rotating component is rotatably mounted on a pin between the two hinge support components;

[0063] The hinge support platform is fixedly installed on the top of the hinge support rotating component.

[0064] Furthermore, as shown in Figures 1 and 2, in this embodiment, the hinge support rotating component is composed of multiple rotating plates arranged side by side at intervals, and each rotating plate is provided with a second through hole.

[0065] Further, as shown in Figures 1 and 2, in this embodiment, the fixing structure includes: a first fixing component, a second fixing component, and a connecting rod assembly;

[0066] The first and second fixing components are symmetrically supported on the upper and lower sides of the concrete support beam of the foundation pit.

[0067] The connecting rod assembly connects the first fixing component and the second fixing component on both sides of the circumferential direction of the concrete support beam in the foundation pit. The first fixing component, the second fixing component and the connecting rod assembly work together to hold the concrete support beam in the foundation pit.

[0068] Further, Figure 5 schematically shows a perspective view of the first fixing component and the second fixing component according to one embodiment of the present invention; Figure 6 schematically shows a perspective view of the mating connection structure of the adjusting rod, the adjusting driver, and the tapered joint according to one embodiment of the present invention. As shown in Figures 5 and 6, in this embodiment, both the first fixing component and the second fixing component include: a base plate 2, an angle steel (unequal-sided angle steel) 3, a lifting lug 8, an adjusting rod 9, a tapered joint 15, and an adjusting driver 18;

[0069] The base plate is supported on the concrete support beams of the foundation pit;

[0070] Angle steel supports are placed on one side of one surface of the base plate;

[0071] Two lifting lugs are spaced apart and supported on the other side of one surface of the base plate; each lifting lug is provided with a third through hole;

[0072] The two adjusting rods pass through the third through hole respectively, and after passing through, the end near the concrete support beam of the foundation pit is screwed to the tapered joint.

[0073] The tapered joint abuts against the outer wall of the concrete support beam of the foundation pit;

[0074] The adjustment actuator is located on the outer wall of the adjustment rod at the end away from the concrete support beam of the foundation pit.

[0075] Further, as shown in Figures 1 and 2, in this embodiment, the connecting rod assembly includes: a connecting rod 4 and a fastening nut 6;

[0076] Multiple connecting rods have their ends passing through the upper and lower base plates respectively, and each connecting rod has external threads at both ends;

[0077] The fastening nuts are screwed to both ends of each connecting rod on one side of the base plate, thus securing the base plate that supports the concrete support beam of the foundation pit on both sides.

[0078] Based on the above-described solution of this utility model, the process of using, installing, and measuring the force of this utility model includes:

[0079] Installation of the force measuring structure: Weld two U-shaped clamps 10 to a base plate 2, install the wire displacement sensor 17 between the two U-shaped clamps 10, weld the hinge support 7 to the top of the force measuring beam 11, place the force measuring beam 11 on the hinge cylinder 16 of the two U-shaped clamps 10, and restrict the sliding of the force measuring beam 11 by the anti-sliding block 5 on the side of the U-shaped clamps 10, and fix the end of the wire 19 of the wire displacement sensor 17 at the center of the bottom of the force measuring beam 11;

[0080] Installation of the fixed structure: Based on the width of the concrete support beam 1 of the foundation pit, adjust the support position of the unequal angle steel 3 through the multiple rows of openings on the base plate 2, and fix the unequal angle steel 3 to the base plate 2 with bolts; first screw the adjusting rod 9 into the opening (third through hole) of the lifting lug 8 welded on the base plate 2, and then screw the other end of the adjusting rod 9 into the internal thread hole of the tapered joint 15; place the two assembled base plates 2 on the upper and lower sides of the concrete support beam 1 of the foundation pit respectively, with the base plate 2 equipped with the force measuring structure located on the upper side of the concrete support beam 1 of the foundation pit, rotate the adjusting driver 18 to drive the adjusting rod 9 to rotate, and push the tapered joint 15 to press it against the concrete support beam 1 of the foundation pit, and fix the base plate to the concrete support beam of the foundation pit with the unequal angle steel 3 installed on the other side of the base plate 2; pass the connecting rod 4 through the opening on the base plate 2, install the fastening nuts 6 at both ends of the connecting rod 4 and tighten them, so that the two base plates 2 are clamped on the concrete support beam 1 of the foundation pit;

[0081] Installation of the hinge support structure: Weld the hinge support rotating part 12 to the bottom of the hinge support platform 13, ensuring that all openings of the hinge support rotating part 12 are on the same axis. Keep the hinge support support 7 and the hinge support rotating part 12 coaxial. Pass the pin 14 through the holes (first through hole and second through hole) of the hinge support support 7 and the hinge support rotating part 12 in sequence. Fix both ends of the pin 14 with nuts to ensure that the pin will not loosen during use.

[0082] Force measurement process: After the construction of the upper trestle structure is completed, the wire displacement sensor 17 is adjusted to ensure that the wire 19 is in a taut state. When the construction vehicle passes through the trestle, the load is transferred to the force measuring beam 11 in sequence through the hinge support platform 13, the hinge support rotating part 12, the pin shaft 14 and the hinge support support 7. The force measuring beam 11 is subjected to the downward pressure of the hinge support support 7 and the supporting force of the hinged cylinder 16, and vertical deflection deformation occurs under the four-point loading state. The wire displacement sensor 17 obtains the amount of deflection deformation and converts it into a load value. The difference between the load values ​​measured when the construction vehicle passes through the trestle structure twice is the loading or unloading amount of the vehicle.

[0083] Dismantling and recycling of the overall foundation pit trestle support: After the project is completed, the trestle support is dismantled in reverse order of the above steps, and all components are recycled and reused.

[0084] According to the above-mentioned solution of this utility model, the trestle support provided by this utility model has a force measuring structure inside, which can replace the weighbridge structure to measure the weight of construction vehicles, thereby avoiding the need for weighbridges in the construction site, solving the problem of temporary facility layout in narrow construction sites, and reducing construction costs; the trestle support of this utility model is a fully assembled structure, which can adapt to support beams in foundation pits of different sizes, is easy to install and disassemble, and can be reused multiple times.

[0085] According to the above-mentioned solution of this utility model, the wire displacement sensor is fixed on the bottom plate on the upper side of the concrete support beam of the foundation pit, and the end of the wire displacement sensor is fixed at the center of the bottom of the force measuring beam. The wire of the wire displacement sensor can transmit the bending deformation of the measuring beam to the wire displacement sensor. The wire displacement sensor converts the bending deformation of the force measuring beam into an electrical signal. After the electrical signal is collected and processed, it is converted into vehicle load information, realizing the real-time measurement of vehicle load.

[0086] According to the above-described solution of this utility model, the structural arrangement of the hinge support structure can ensure the overall support stability and rotational flexibility of the support.

[0087] According to the above-mentioned solution of this utility model, all components of this utility model are connected by welding or bolts, eliminating the need to pre-embed connectors in the concrete support beam of the foundation pit. This makes installation and disassembly simple, and the recycling rate is high, which can further improve the construction efficiency of the trestle support and reduce the construction cost.

[0088] This invention can use a force-measuring structure to obtain the vehicle load passing over the trestle in real time, avoiding the need for a weighbridge in foundation pit construction, solving the problem of temporary facility layout in narrow construction sites, and reducing construction costs.

[0089] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A prefabricated foundation pit trestle support with measurable force, characterized in that, include: The force-measuring structure is supported on the concrete support beam of the foundation pit and measures the load transmitted on the prefabricated foundation pit trestle above the concrete support beam of the foundation pit. A hinged support structure is provided on the force-measuring structure and supports the prefabricated foundation pit trestle, transferring the load transmitted from the prefabricated foundation pit trestle to the force-measuring structure for measurement. A fixed structure is provided on the upper and lower sides of the foundation pit concrete support beam, and the force-measuring structure is fixed on the fixed structure located on the upper side of the foundation pit concrete support beam. The force-measuring structure includes: two U-shaped clamps spaced apart and supported on the fixed structure, a force-measuring beam, anti-slip blocks, a pull-wire displacement sensor, and a pull wire. A hinged cylinder is supported at the opening of each U-shaped clamp. The two ends of the force-measuring beam are respectively supported on the hinged cylinders of the two U-shaped clamps. Two anti-slip blocks are respectively set on the outside of the two U-shaped clamps to limit the force-measuring beam. One end of the pull wire is installed at the center of the bottom surface of the force-measuring beam. The pull-wire displacement sensor is set at the other end of the pull wire to make the pull wire vertically taut in a non-stressed state.

2. The prefabricated foundation pit trestle support with measurable force according to claim 1, characterized in that, The hinge support structure includes: two hinge support members, a hinge support rotating member, a hinge support platform, and a pin; the two hinge support members are supported on the upper surface of the force measuring beam at intervals, and each of the two hinge support members is provided with a first through hole; the hinge support rotating member is provided with a second through hole; the first through hole and the second through hole are arranged coaxially, and the pin passes through each of the first through hole and the second through hole and is locked; the hinge support rotating member is rotatably mounted on the pin between the two hinge support members; the hinge support platform is fixedly installed on the top of the hinge support rotating member.

3. The prefabricated foundation pit trestle support with measurable force according to claim 2, characterized in that, The hinge support rotating component consists of multiple rotating plates arranged side by side at intervals, and each rotating plate is provided with a second through hole.

4. The prefabricated foundation pit trestle support with measurable force according to claim 1, characterized in that, The fixing structure includes: a first fixing component, a second fixing component, and a connecting rod assembly; the first fixing component and the second fixing component are symmetrically supported on the upper and lower sides of the foundation pit concrete support beam; the connecting rod assembly connects the first fixing component and the second fixing component on both sides of the foundation pit concrete support beam in the circumferential direction, and the first fixing component, the second fixing component, and the connecting rod assembly are used to connect and hold the foundation pit concrete support beam tightly.

5. The prefabricated foundation pit trestle support with measurable force according to claim 4, characterized in that, Both the first and second fixing components include: a base plate, an angle steel, lifting lugs, adjusting rods, a tapered joint, and an adjusting actuator; the base plate is supported on the concrete support beam of the foundation pit; the angle steel is detachably and adjustablely supported on one side of one surface of the base plate; the two lifting lugs are spaced apart and supported on the other side of the same surface of the base plate; each lifting lug is provided with a third through hole; the two adjusting rods pass through each of the third through holes respectively, and after passing through, one end near the concrete support beam of the foundation pit is screwed to the tapered joint; the tapered joint abuts against the outer wall of the concrete support beam of the foundation pit; the adjusting actuator is disposed on the outer wall of the other end of the adjusting rod away from the concrete support beam of the foundation pit.

6. The prefabricated foundation pit trestle support with measurable force according to claim 5, characterized in that, The connecting rod assembly includes: connecting rods and fastening nuts; the two ends of the plurality of connecting rods pass through the upper and lower base plates respectively, and the two ends of each connecting rod are provided with external threads; the fastening nuts are screwed to the two ends of each connecting rod on one side of the base plate, thereby fastening the base plates supporting the upper and lower sides of the foundation pit concrete support beam.

Images