Bridge reinforcing structure for transporting large pieces

Abstract

The utility model relates to a bridge reinforcing structure for transporting large pieces, which comprises a supporting mechanism for supporting a to-be-reinforced area of a bridge, and is characterized by further comprising an acting structure acting on a soft soil foundation corresponding to the to-be-reinforced area, the supporting mechanism at least bears part of the load of the bridge by means of the acting structure and disperses the load on the soft soil foundation, and compared with the prior art, the supporting structure has the advantages that the acting structure is arranged on the soft soil foundation corresponding to the area to be reinforced of the bridge; the supporting mechanism can at least bear part of the load of the bridge by means of the acting structure and disperse the load on the soft soil foundation, so that the bridge built on the soft soil foundation can bear relatively larger load to meet the requirement of large-piece transportation, and the stability of the bridge on the soft soil foundation during large-piece transportation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge reinforcement, in particular to a reinforcement structure for improving the stability of a bridge during large-scale transportation. Background Art

[0002] At present, in industries such as petrochemicals and wind power generation, there is often a need to transport large goods such as large equipment, and the weight of these large goods usually ranges from tens of tons to thousands of tons. As the throat of transportation, bridges play a vital role in ensuring the accessibility of routes for large-scale transportation. However, due to the limitations of the design load level, bridges often cannot meet the needs of overweight cargo transportation, especially some bridges built in the early days. Therefore, in order to avoid damage to the bridge structure during the transportation of large items through bridges, and considering safety issues, temporary reinforcement measures are usually required for bridges.

[0003] At present, the commonly used temporary bridge reinforcement methods include the spanning unloading method and the vertical support method. Among them, the spanning unloading method is also called the bridge reinforcement method, which refers to setting up a temporary steel structure beam on the bridge deck and setting the beam support point outside the bridge pier or abutment to form a bridge structure on the bridge, so as to use the temporary steel structure beam to bear and disperse the load to reduce the burden of the original bridge. Commonly used bridge structures can refer to the bridge-on-bridge device provided in the Chinese utility model patent "A Steel Structure Bridge Bridge Device" with application number CN202221247760.9 (publication number CN217781709U). The vertical support method refers to setting up temporary support under the bridge, which is equivalent to reducing the span of the bridge, and can effectively improve the stress state of various parts of the bridge. The commonly used vertical support structure can refer to the support structure provided in the Chinese invention patent "Bridge Reinforcement Device" with application number CN201611091288.3 (publication number CN106677077B).

[0004] However, if the foundation under the bridge is a soft soil foundation, the above-mentioned bridge reinforcement structure will have certain defects during implementation. Specifically, due to the insufficient bearing capacity of the soft soil foundation, the bridge structure on the bridge may be unable to withstand relatively large loads due to the insufficient bearing capacity of the foundation of the piers; and the conventional vertical support structure will be difficult to implement pile foundations on the soft soil foundation, resulting in insufficient bearing capacity of temporary support, and unable to effectively share the large transportation load. Considering that soft soil foundations are sometimes unavoidable during bridge construction, especially in my country's ports and riverside cities and bridges and highway projects near the sea and rivers, it is necessary to further improve the existing technology. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a bridge reinforcement structure for large-scale transportation which is more suitable for soft soil foundation in view of the above-mentioned existing technical status.

[0006] The technical solution adopted by the utility model to solve the technical problem is: the bridge reinforcement structure used for large-scale transportation includes a supporting mechanism for supporting the area to be reinforced of the bridge, and is characterized in that it also includes an acting structure acting on the soft soil foundation corresponding to the area to be reinforced, and the supporting mechanism at least bears part of the load of the bridge with the help of the acting structure and disperses it on the soft soil foundation.

[0007] In order to make the soft soil foundation have a certain bearing capacity, preferably, the soft soil foundation corresponding to the area to be reinforced is dredged by replacement or stone throwing and silt squeezing, and the functional structure includes a hardening layer that can harden the soft soil foundation corresponding to the area to be reinforced after dredging. The hardened layer can be hardened by, for example, concrete, and since the hardened layer can inhibit the soft soil below from squeezing out to the surroundings, the bearing characteristics of the soft soil foundation are significantly improved; specifically, on the one hand, in addition to the diffusion effect of transferring the load to the soft soil foundation below, the hardened layer can also bear part of the shear force generated by the load; on the other hand, since the hardened layer has a certain stiffness, the distribution law of the additional stress in the soil is changed, so that the value of the additional stress transmitted to the soft soil foundation below is significantly reduced; in addition, the time for large-scale transport vehicles to pass through the bridge is relatively short, and the pore water pressure of the deep soft soil foundation has not dissipated rapidly in a short period of time, and the plastic deformation of the soil has not occurred. The short-term mechanical properties of the soft soil foundation can be simulated according to the elastic state. According to the empirical value of geotechnical mechanics, the elastic modulus of general silt soil and clay is about 8 times its compression modulus; in summary, by utilizing the short-term bearing capacity of the soft soil foundation and establishing a hardened layer on the surface, the local stress concentration phenomenon of the soft soil layer can be reduced, and a larger bearing capacity can be provided in a short period of time to meet the requirements of large-scale transportation.

[0008] In order to facilitate the arrangement of the support mechanism on the action structure, preferably, the action structure further comprises a surface layer arranged on the hardened layer, and the support mechanism is directly arranged on the surface layer. The surface layer is arranged because the hardened layer usually contains large gravels and has a slightly poor flatness. If the support mechanism is directly arranged on the hardened layer, uneven force may occur locally, and even cause the support mechanism to become unstable or damaged. Therefore, the surface layer is conducive to the arrangement of the support mechanism.

[0009] Furthermore, in order to connect the hardened layer and the surface layer, preferably, the surface layer is a concrete layer or a prefabricated panel layer, and the surface layer and the hardened layer are bonded by a connecting layer. The surface layer is set as a concrete layer or a prefabricated panel layer so that the surface layer has a certain flatness to facilitate the setting of the support mechanism, and the connecting layer can connect the surface layer and the hardened layer on the one hand, and can also control the cost of the functional structure on the other hand. For example, when the surface layer is a concrete layer, the size of the crushed stone material of the surface layer, the connecting layer and the hardened layer can be gradually increased, thereby reducing the cost.

[0010] In order to prevent the support mechanism from being subjected to uneven force locally, preferably, a connector that can improve its flatness is provided on the surface layer, and at least a portion of the connector is a flat area for the support mechanism to be stably arranged. The connector can be made of a channel steel with a flat area or directly use a flat steel plate and other structures, thereby further improving the flatness of the surface layer to prevent the support mechanism from being unstable or damaged due to uneven force locally.

[0011] In order to prevent the adverse effects of accumulated water on the functional structure, preferably, the upper surface of the surface layer is partially concave downward at the periphery of the support mechanism to form a groove, and the groove is used to drain the accumulated water on the surface layer. The groove is provided, on the one hand, considering that concrete is difficult to harden when soaked in accumulated water, and on the other hand, considering that accumulated water may also have an adverse effect on the functional structure during future maintenance.

[0012] In order to facilitate the support mechanism to support the area to be reinforced of the bridge, preferably, the support mechanism includes a bracket, and the bracket includes an upper frame directly abutting against the area to be reinforced of the bridge, a lower frame directly abutting against the action structure, and an adjustment structure for adjusting the relative distance between the upper frame and the lower frame along the length direction of the bracket. The adjustment structure is provided on the one hand to facilitate the abutment of the support mechanism with the bridge and the action structure, and on the other hand to take into account that under long-term use, a gap may be generated between the support mechanism and the area to be reinforced of the bridge due to vibration, so it is necessary to adjust the relative distance between the upper frame and the lower frame along the length direction of the bracket so that the bracket contacts the bridge again.

[0013] Furthermore, in order to enable the adjustment structure to adjust the relative distance between the upper frame and the lower frame along the length direction of the bracket, preferably, the adjustment structure includes a threaded portion provided on at least a partial lower portion of the upper frame, and correspondingly, the adjustment structure also includes a matching portion provided on the lower frame and adapted to the threaded portion. By rotating the threaded portion in the matching portion, the relative distance between the upper frame and the lower frame along the length direction of the bracket can be adjusted, and such a design structure is relatively simple.

[0014] Compared with the prior art, the advantages of the utility model are that an action structure is arranged on the soft soil foundation corresponding to the area to be reinforced of the bridge, and the supporting mechanism can bear at least part of the load of the bridge with the help of the action structure and disperse it on the soft soil foundation, so that the bridge built on the soft soil foundation can bear a relatively larger load to meet the needs of large-scale transportation, thereby improving the stability of the bridge on the soft soil foundation during large-scale transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the bridge reinforcement structure in Example 1 of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the functional structure in Example 1 of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the support mechanism in Example 1 of the utility model;

[0018] Figure 4 This is a schematic diagram of the exploded structure of the support mechanism in Example 1 of the utility model;

[0019] Figure 5 This is a schematic diagram of the connection relationship between the support mechanism and the action structure in Example 1 of the utility model;

[0020] Figure 6 It is a schematic diagram of the state of the bridge reinforcement structure when the upper section is mounted at the first working position in Example 1 of the utility model;

[0021] Figure 7 It is a schematic diagram of the state of the bridge reinforcement structure when the upper section is mounted on the second working station in Example 1 of the utility model. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with specific embodiments.

[0023] Example 1

[0024] like Figures 1 to 5 The figure shows a preferred embodiment of the utility model. The bridge reinforcement structure for large-scale transportation includes a support mechanism 1 for supporting the area B to be reinforced of the bridge, and also includes an action structure 2 acting on the soft soil foundation F corresponding to the area B to be reinforced. The support mechanism 1 bears at least part of the load of the bridge with the help of the action structure 2 and disperses it on the soft soil foundation F. In order to make the soft soil foundation F have a certain bearing capacity, the soft soil foundation F corresponding to the area B to be reinforced is also desilted by replacing the filling or throwing stones to squeeze the silt, and the action structure 2 includes a hardening layer 21 that can harden the soft soil foundation F corresponding to the area B to be reinforced after the desilting state. The hardening layer 21 in this embodiment is a concrete layer hardened by concrete after the mixing of throwing stones and slag. The hardening layer 21 can inhibit the soft soil below from being squeezed out to the surroundings, thereby significantly improving the bearing characteristics of the soft soil foundation F.

[0025] Furthermore, in order to facilitate the arrangement of the support mechanism 1 on the action structure 2, the action structure 2 in this embodiment also includes a surface layer 22 arranged on the hardened layer 21, and the support mechanism 1 is directly arranged on the surface layer 22. The surface layer 22 is arranged because the hardened layer 21 usually contains large crushed stones and has a slightly poor flatness. If the support mechanism 1 is directly arranged on the hardened layer 21, there may be a phenomenon of local uneven force, and even cause the support mechanism 1 to become unstable or damaged. Specifically, in order to connect the hardened layer 21 and the surface layer 22, the surface layer 22 is a concrete layer or a prefabricated panel layer, and the surface layer 22 and the hardened layer 21 are bonded by a connecting layer 23. The surface layer 22 in this embodiment is a concrete layer, and the connecting layer 23 is also a concrete layer. On the one hand, the connecting layer 23 can connect the surface layer 22 and the hardened layer 21, and on the other hand, it can also control the cost of the action structure 2. For example, the size of the crushed stone materials of the surface layer 22, the connecting layer 23 and the hardened layer 21 in this embodiment is gradually increased to reduce the cost. In order to further improve the flatness of the surface layer 22, a connector 24 that can improve its flatness is provided on the surface layer 22, and at least a portion of the connector 24 is a plane area for the support mechanism 1 to be stably set. The connector 24 in this embodiment is a channel steel, so as to prevent the support mechanism 1 from becoming unstable or damaged due to local uneven force. In addition, in order to avoid the adverse effect of accumulated water on the functional structure 2, preferably, the upper surface of the surface layer 22 is located at the periphery of the support mechanism 1 and is partially concave downward to form a groove, and the groove is used to drain the accumulated water on the surface layer 22. The groove is provided, on the one hand, considering that concrete is difficult to harden when immersed in accumulated water, and on the other hand, considering that accumulated water may also have an adverse effect on the functional structure 2 during future maintenance.

[0026] In order to facilitate the support mechanism 1 to support the bridge area B to be reinforced, the support mechanism 1 in this embodiment includes a bracket 11, which includes an upper frame 111 directly abutting against the bridge area B to be reinforced, a lower frame 112 directly abutting against the action structure 2, and an adjustment structure 113 for adjusting the relative distance between the upper frame 111 and the lower frame 112 along the length direction of the bracket 11. The adjustment structure 113 is provided on the one hand to facilitate the support mechanism 1 to abut against the bridge and the action structure 2, and on the other hand to take into account that under long-term use, a gap G may be generated between the support mechanism 1 and the bridge area B to be reinforced due to vibration, so it is necessary to adjust the relative distance between the upper frame 111 and the lower frame 112 along the length direction of the bracket 11 so that the bracket 11 abuts against the bridge again. The upper section of the upper frame 111 in this embodiment is an H-shaped steel with sufficient supporting strength, and the adjustment structure 113 includes a threaded portion 114 provided on at least a part of the lower section of the upper frame 111. Correspondingly, the adjustment structure 113 also includes a matching portion 115 provided on the lower frame 112 and adapted to the threaded portion 114. By rotating the threaded portion 114 in the matching portion 115, the relative distance between the upper frame 111 and the lower frame 112 along the length direction of the bracket 11 can be adjusted, and such a design structure is relatively simple.

[0027] The specific usage of the support mechanism 1 provided in this embodiment is as follows:

[0028] like Figure 6 As shown, at this time, the upper frame 111 is in the first position, that is, there is a gap G between the upper frame 111 and the bridge area B to be reinforced. The gap G can facilitate the installation of the bracket 11 to the set position. In addition, the bracket 11 that has been in contact with the area B to be reinforced may also have the gap G after long-term use; see Figure 7 Through the adjustment structure 113, the upper frame 112 is moved to the second working position relative to the lower frame 112 along the length direction of the bracket 11. At this time, there is no gap G between the upper frame 112 and the area B to be reinforced of the bridge, so that the upper frame 112 is in contact with the bridge.

[0029] Example 2

[0030] The structure is basically the same as that of Example 1, except that the surface layer 22 in this embodiment is a prefabricated panel layer, and correspondingly, the connecting layer 23 is an adhesive layer composed of epoxy grouting material.

Claims

1. A bridge reinforcement structure for large-scale transport, comprising a support mechanism (1) for supporting a bridge area to be reinforced (B), characterized in that: It also includes an action structure (2) acting on the soft soil foundation (F) corresponding to the area to be reinforced (B), and the support mechanism (1) at least bears part of the load of the bridge with the help of the action structure (2) and disperses it on the soft soil foundation (F).

2. The bridge reinforcement structure according to claim 1, characterized in that: The soft soil foundation (F) corresponding to the area to be reinforced (B) is desilted by replacing the filling or throwing stones to squeeze out the silt, and the functional structure (2) includes a hardening layer (21) that can harden the soft soil foundation (F) corresponding to the area to be reinforced (B) after desilting.

3. The bridge reinforcement structure according to claim 2, characterized in that: The functional structure (2) further comprises a surface layer (22) arranged on the hardening layer (21), and the supporting mechanism (1) is directly arranged on the surface layer (22).

4. The bridge reinforcement structure according to claim 3, characterized in that: The surface layer (22) is a concrete layer or a prefabricated panel layer, and the surface layer (22) and the hardened layer (21) are bonded via a connecting layer (23).

5. The bridge reinforcement structure according to claim 3, characterized in that: The surface layer (22) is provided with a connecting piece (24) capable of improving its flatness, and at least a portion of the connecting piece (24) is a plane area for stably arranging the supporting mechanism (1).

6. The bridge reinforcement structure according to claim 3, characterized in that: The upper surface of the surface layer (22) is located at the periphery of the support mechanism (1) and is partially recessed downward to form a groove, and the groove is used to drain the accumulated water on the surface layer (22).

7. The bridge reinforcement structure according to any one of claims 1 to 6, characterized in that: The support mechanism (1) comprises a support (11), wherein the support (11) comprises an upper frame (111) directly abutting against a region (B) to be reinforced of the bridge, a lower frame (112) directly abutting against the action structure (2), and an adjustment structure (113) for adjusting the relative distance between the upper frame (111) and the lower frame (112) along the length direction of the support (11).

8. The bridge reinforcement structure according to claim 7, characterized in that: The adjustment structure (113) includes a threaded portion (114) disposed on at least a partial lower portion of the upper frame (111); correspondingly, the adjustment structure (113) also includes a matching portion (115) provided on the lower frame (112) and adapted to the threaded portion (114).

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