CN109208459B

CN109208459B - Weight increasing device for stabilizing bridge

Info

Publication number: CN109208459B
Application number: CN201811161767.7A
Authority: CN
Inventors: 王能
Original assignee: Individual
Current assignee: Jinhua Hongchuang Traffic Engineering Design Co.,Ltd.
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2020-04-14
Anticipated expiration: 2038-09-30
Also published as: CN109208459A

Abstract

The invention relates to a weight increasing device for stabilizing a bridge, which comprises a bridge pier, a beam body, at least one balancing weight arranged below the beam body and vertically arranged pull rods in one-to-one correspondence with the balancing weight, wherein two ends of each pull rod are respectively in threaded connection with the beam body and the balancing weight in opposite rotating directions; the rotatable turbine paddle is arranged on the bridge pier, the turbine paddle is in transmission connection with the pull rod, and when the turbine paddle rotates, the pull rod rotates along with the turbine paddle; the invention controls the rotation of the turbine paddle through the height change of the water level and the speed change of the fluid, thereby realizing the tensioning of the pull rod and increasing the weight of the balancing weight or the riverbed onto the beam body to realize the weight increment.

Description

Weight increasing device for stabilizing bridge

Technical Field

The invention relates to the field of bridge construction, in particular to a weight increasing device for stabilizing a bridge.

Background

The stability of the bridge is guaranteed by the safety of the bridge, the stability of the bridge cannot have great potential safety hazard in normal use, but when similar accidents such as sudden rising of water level, rapid water flow and the like caused by strong wind or heavy rain occur, the impact force on the bridge is most likely to exceed the design strength, so that the bridge is in danger of collapse, the vehicle passing is influenced, great economic loss is brought, and even casualties are caused; especially, the safety of the bridge is threatened by geological disasters such as strong wind and rainfall areas or coastal areas, mountain floods, debris flows and the like and river water level rises.

When the situation occurs, not only can the pier part be impacted, but also the beam body can be scoured when the water level is high, so that the bridge body can be deviated or broken, and particularly, the influence on some light bridges such as steel structure bridges, floating bridges and the like is particularly obvious; in order to maintain good stability of the bridge when the above situations occur, related personnel often adopt a heavy-load bridge pressing mode to emergently deal with the overall stability of the bridge, for example, a plurality of full-load trucks or train carriages are driven onto the bridge, or sandbags are piled on the bridge, and the method for increasing the weight can increase the extrusion force between the bridge body and the bridge pier as well as between the bridge pier and the ground, so that on one hand, the friction force between the bridge body and the bridge pier is increased, and simultaneously, the inertia potential energy of the bridge per se is rapidly increased, so that the bridge can be kept stable better when being impacted, and the displacement of the local or the overall is avoided.

Although the method cannot fundamentally solve the safety problem of the bridge, the method is a simple and rapid guarantee method for dealing with emergency; the method has the following defects: firstly, auxiliary operation needs to be carried out by means of equipment and personnel, and secondly, a long time is consumed to complete the implementation process, so that a great potential safety hazard exists for field personnel, and once an accident occurs in the implementation process, more unnecessary property loss and casualties can be caused; therefore, the method should be fused with the bridge to obtain safer and faster emergency use effect.

Disclosure of Invention

In order to overcome the technical defects in the prior art, the invention provides a weight increasing device for stabilizing a bridge, which aims to solve the problems that the existing bridge has insufficient resistance to impact force and cannot safely and timely deal with emergency.

The technical scheme for solving the problem is as follows: the bridge comprises a pier with a cylindrical culvert, a beam body arranged on the pier, at least one balancing weight arranged below the beam body and a pull rod vertically arranged corresponding to the balancing weight one by one, wherein two ends of the pull rod are respectively in threaded connection with the beam body and the balancing weight in opposite rotating directions; the bridge pier is provided with a rotatable turbine paddle which is arranged in the cylindrical culvert and is coaxial with the cylindrical culvert, the turbine paddle is in transmission connection with the pull rod, and when the turbine paddle rotates, the pull rod rotates along with the turbine paddle.

The invention has simple operation, controls the rotation of the turbine paddle through the height change of the water level and the speed change of the fluid, further realizes the tension of the pull rod, increases the weight of the balancing weight or the riverbed onto the beam body to realize the weight increment, can finish the automatic stable operation without manual intervention, not only ensures the stability of the bridge, but also avoids the safety risk existing in the field operation; meanwhile, other materials, equipment and energy sources are not required to be input, and a large amount of cost is saved.

Drawings

Fig. 1 is a front view of the present invention.

FIG. 2 is a schematic cross-sectional view taken along line A-A of the present invention.

Fig. 3 is an enlarged view of portion B of fig. 1 according to the present invention.

Fig. 4 is an enlarged view of the portion C of fig. 2 according to the present invention.

FIG. 5 is a schematic cross-sectional view taken along line D-D of FIG. 3 according to the present invention.

Fig. 6 is a schematic perspective view of the present invention.

Fig. 7 is an enlarged view of portion E of fig. 6 of the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 7, the present invention comprises a pier 1 with a cylindrical culvert, a beam body 2 installed on the pier 1, at least one counterweight block 3 arranged below the beam body 2, and vertically arranged pull rods 4 corresponding to the counterweight blocks 3 one by one, wherein the upper and lower ends of each pull rod 4 are respectively connected with the beam body 2 and the counterweight block 3 through threads with opposite turning directions, and when the pull rods 4 rotate, the beam body 2 and the counterweight block 3 respectively generate thread transmission with the pull rods 4 to enable the beam body 2 and the counterweight block 3 to generate close movement or separate movement; the bridge pier 1 is provided with a rotatable turbine impeller 5 which is arranged in the cylindrical culvert and is coaxial with the cylindrical culvert, the turbine impeller 5 is in transmission connection with the pull rod 4, and when the turbine impeller 3 rotates, the pull rod 4 rotates along with the turbine impeller.

Preferably, the turbine paddle 5 is rotatably connected with the pier 1 through a bearing 6, a first helical gear 7 coaxially connected with the turbine paddle 5 is arranged on the turbine paddle 5, a worm shaft 8 horizontally arranged on the pier 1 is arranged on the axis, a second helical gear 9 meshed with the first helical gear 7 is arranged on the worm shaft 8, and the worm shaft 8 is in transmission connection with the pull rod 4 through a worm gear mechanism 10 consisting of a worm coaxially connected with the worm shaft 8 and a worm wheel coaxially connected with the pull rod 4.

Preferably, the worm shaft 8 and the second helical gear 9 are coaxially connected through a torque limiter 11, and the torque limiter 11 can ensure that the worm shaft 8 and the second helical gear 9 slip to disconnect torque transmission when the torque applied to the second helical gear 9 is too large, so as to avoid the phenomenon that the pull rod 4 generates too large tension between the beam body 2 and the counterweight 3 to damage the beam body 2 due to too large torque.

Preferably, the turbine paddle 5 is in transmission connection with the pull rod 4 through a torque limiter 11.

Preferably, the beam body 2 is provided with a connecting block 12 arranged below the beam body 2, and the upper end of the pull rod 4 is in threaded connection with the connecting block 12.

Preferably, the pier 1 is provided with a spherical filter screen 13 arranged at the end part of the cylindrical culvert, and the filter screen 13 can isolate large-volume objects and prevent the turbine paddles 5 from being damaged due to impact.

The bridge pier is not different from a common bridge in normal use, the bridge pier 1 is used for supporting the beam body 2, and the beam body 2 is used for passing vehicles and pedestrians; during installation, the transmission components can be installed on the box body 14, and then the box body 14 is installed on the pier 1 by selecting a proper installation mode according to actual requirements, such as: 1) preassembling the box body 14 on a reinforcing steel bar frame of the pier 1, and then pouring concrete; 2) adopting a steel structure and concrete mixed pier, and directly installing the box body 14 or the components on the steel structure part; 3) adopting a thin-wall hollow pier, and directly pre-installing the box body 14 or the components in the hollow pier; 4) in order to facilitate later maintenance, the box body 14 can be suspended and fixed on the outer side of the pier 1; no matter what installation mode is selected, only the water flow can flow through the turbine impeller 5; (ii) a Arranging a reasonable number of piers 1 according to the width of a river channel and actual use requirements, fixing a beam body 2 on the piers 1, selecting a counterweight block 3 with proper weight according to the actual use requirements, and ensuring that the counterweight block 3 is stably arranged on a river bed and cannot generate horizontal displacement due to water flow scouring; in order to make the counterweight 3 work reliably, it can be placed on the river bed stably by a plurality of implementation methods including but not limited to the following: a) the counterweight block 3 is vertically connected with the pier 1 in a sliding way; b) arranging a sunk well matched with the balancing weight 3 at the bottom of the river bed, and placing the balancing weight 3 at the bottom of the sunk well to enable the balancing weight to slide up and down in the sunk well; c) the balancing weight 3 is fixedly connected on the riverbed or is buried in the underground depth of the riverbed.

When the river water level is low, the water flow does not contact with the turbine blade 5 or does not make a large area contact, and therefore, the turbine blade 5 does not rotate, and accordingly, the remaining components do not move.

When river water level rises, when the velocity of flow accelerates, turbine oar 5 receives the impact of rivers and produces and rotates, and pull rod 4 produces under the transmission of gear pair and worm gear mechanism 10 and rotates, and the rotation that pull rod 4 this orientation is down makes the both ends of pull rod 4 produce the spiral with roof beam body 2 and balancing weight 3 respectively and screw to draw 3 pullups of balancing weight and make roof beam body 2 increase weight, corresponding to the different implementation methods of the aforesaid adoption to balancing weight 3, the actual weight increase condition on the roof beam body 2 is different: a) the weight of the balancing weight 3 is added on the beam body 2, so that the expected weight increasing effect can be obtained by selecting the balancing weight 3 with proper weight; b) the weight of the counterweight 3 is also added on the beam body 2, and the counterweight 3 does not influence the pier 1 when not working under the condition; c) the beam body 2 is added with tension force generated by screwing the pull rod 4, which can be indirectly understood as pulling a riverbed with a certain weight to the beam body 2, and in this case, the specific weight increasing effect needs to be determined by setting the actual screwing distance of the pull rod 4 or adopting a tension sensor.

Although the weight increasing effect generated on the beam body 2 under different conditions is different, the weight increasing operation is realized, the effect of stabilizing the bridge is achieved, and the bridge can be reasonably selected according to different use environments and geological characteristics.

However, since the screwing distance of the screw threads between the pull rod 4 and the beam body 2 and the counterweight block 3 is limited, the pull rod 4 may be twisted off or deformed when the torque is large when the turbine propeller 5 rotates after the pull rod 4 and the beam body 2 and the counterweight block 3 reach the maximum screwing distance along with the continuous rotation of the turbine propeller 5, and meanwhile, the weight of the riverbed under the condition of c) tends to be infinite theoretically, so that the pull force applied to the pull rod 4 under the condition is increased continuously, and the pull rod is easy to break or deform; therefore, the torque limiter 11 is adopted to transmit the torque, and the aim of the invention is to ensure that when the torque transmitted to the pull rod 4 by the turbine propeller 5 is too large due to the resistance generated after the pull rod 4 reaches the maximum screwing distance, the torque transmission can be cut off by the automatic overrun slipping function of the torque limiter 11, so that on one hand, the turbine propeller 5 can continuously rotate without being subjected to the resistance to prevent the turbine propeller 5 from being damaged by the frontal impact of water flow after the turbine propeller stops rotating, on the other hand, the pull rod 4 is not subjected to continuous torque, the tensile force applied to the beam body 2 is ensured to be within the expected reasonable range, and the phenomenon that the weight increased on the beam body 2 exceeds the design load to be damaged is avoided.

In addition, under the condition of strong convection, even if the water level is not raised and the flow velocity is not accelerated, the turbine paddle 5 can still rotate under the pushing of wind power, so that the weight increment of the beam body 2 is realized, and the stabilizing effect is achieved.

When the emergency state is relieved, the water level of the river is lowered, the flow speed is reduced, the wind power is weakened, and the weight of the bridge does not need to be increased continuously, so that the pull rod 4 is reset; because its automatic re-setting after the overload on the torque limiter 11 is eliminated, therefore the accessible manual reversal turbine oar 5 accomplishes the operation of loosening soon between pull rod 4 and roof beam body 2 and balancing weight 3 to the lower pulling force that receives on making the roof beam body 2 reduces gradually until eliminating completely, and the bridge resumes normal use.

The invention has smart structure and simple operation, controls the rotation of the turbine propeller through the height change of the water level and the speed change of the fluid, further realizes the tensioning of the pull rod, increases the weight of the balancing weight or the riverbed onto the beam body to realize the weight increase, can finish the automatic stable operation without manual intervention, not only effectively solves the stability problem of the bridge in emergency, but also effectively replaces the existing operation mode of pressing the bridge through external equipment and manpower, not only greatly ensures the stability of the bridge, but also avoids the safety risk existing in field operation.

Meanwhile, the counterweight block or the riverbed is used as a weight increasing object, other materials and equipment are not required to be input, a large amount of cost is saved, natural resources such as water energy and wind energy are utilized to drive the pull rod to generate pulling force in the implementation process, common energy sources such as electric power and hydraulic pressure are not required, and the weight increasing process can be prevented from being interrupted or greater safety risks are caused due to the fact that water flow or strong convection damages cables, oil ways and the like.

Claims

1. A weight increasing device for stabilizing a bridge comprises a pier (1) with a culvert, a beam body (2), at least one balancing weight (3) arranged below the beam body (2) and pull rods (4) which are vertically arranged and correspond to the balancing weight (3) one by one, wherein two ends of each pull rod (4) are respectively in threaded connection with the beam body (2) and the balancing weight (3) in opposite rotating directions; pier (1) on have rotatable turbine oar (5), turbine oar (5) are gone up and are had first helical gear (7) with turbine oar (5) coaxial coupling, have worm axle (8) that the axis level set up on pier (1), worm axle (8) are gone up and are had second helical gear (9) with first helical gear (7) engaged with, worm axle (8) be connected through worm gear mechanism (10) transmission with pull rod (4), when turbine oar (5) rotated, pull rod (4) produced the rotation thereupon.

2. A weight gain device for stabilizing bridges according to claim 1, characterized in that the turbine paddles (5) are in rotational connection with the bridge piers (1) via bearings (6).

3. A weight gain device for stabilizing bridges according to claim 1, characterized in that the worm shaft (8) and the second bevel gear (9) are coaxially connected via a torque limiter (11).

4. The weight increasing device for stabilizing the bridge according to claim 1, wherein the beam body (2) is provided with a connecting block (12) arranged below the beam body (2), and the upper end of the pull rod (4) is connected with the connecting block (12) through threads.

5. A weight increasing device for stabilizing bridges according to claim 1, characterized in that the piers (1) have screens (13) placed at the ends of culverts.