Bridge underpinning and jacking device in deep foundation pit excavation state

Abstract

The utility model discloses a bridge underpinning and jacking device in a deep foundation pit excavation state, which belongs to the field of foundation pit bridge jacking and comprises a jacking assembly and a supporting assembly, the jacking assembly comprises a plurality of supporting columns, jacks are detachably mounted at the upper ends of the supporting columns, I-shaped steel is detachably mounted between every two jacks, and the I-shaped steel is fixedly connected with the jacking assembly. A plurality of first bolts are installed on the multiple supporting columns, a plurality of first screw holes are formed in the lower ends of the multiple jacks, and the first bolts are in threaded connection with the interiors of the first screw holes. And meanwhile, the overall compressive strength and stability of the jacking device can be remarkably improved, so that the use safety of the jacking device can be enhanced, meanwhile, the jacking device can be conveniently detached through mutual cooperation of the structures, and then the detaching convenience of the jacking device can be improved.

Description

Technical Field

[0001] The utility model relates to the field of foundation pit bridge jacking, in particular to a bridge underpinning and jacking device in a deep foundation pit excavation state. Background Art

[0002] Excavation refers to the process of digging soil and rock from a certain depth underground, loosening, crushing, excavating, and transporting it to construct the foundation of a building. Excavation is typically conducted at the foundation's designed location. The excavation plan is determined based on geological and hydrological data and the conditions of nearby buildings. Appropriate waterproofing and drainage are also required. Excavation is also used in bridge underpinning, a foundation engineering technique used to reinforce and underpin a bridge's foundation to increase its bearing capacity and stability. This technique is typically used when the foundation conditions are poor and cannot meet the requirements for the new bridge's use. The underpinning technology replaces the original pile foundation by driving new piles next to the bridge pile foundation. After the new pile foundation supports the bridge, the old piles are cut and broken so that the bearing capacity of the bridge is supported by the new piles. During the bridge underpinning process, the bridge needs to be jacked up, and a jacking device needs to be used. The overall structure of the existing jacking device is simple. Since the overall weight of the bridge is heavy, the stability during jacking needs to be improved. Based on this, it is necessary to provide a jacking device that can significantly improve the jacking stability and thus improve the jacking safety. In addition, most of the existing jacking devices are integral structures, and the operation is cumbersome during disassembly. Based on this, it is necessary to provide a jacking device that is easy to disassemble. Utility Model Content

[0003] The embodiment of the utility model provides a bridge underpinning jacking device in the deep foundation pit excavation state, which aims to solve the problems that the overall jacking strength and stability of the existing jacking device need to be improved and it is not easy to disassemble.

[0004] To achieve the above-mentioned purpose, the utility model provides a bridge underpinning and lifting device in a deep foundation pit excavation state, comprising a lifting assembly and a supporting assembly;

[0005] The jacking assembly includes a plurality of support columns, a jack is detachably mounted on the upper end of each of the support columns, an I-beam is detachably mounted between each of the jacks, a plurality of first bolts are mounted on each of the support columns, a plurality of first screw holes are formed at the lower end of each of the jacks, and the first bolts are threadedly connected to the interior of the first screw holes;

[0006] The support assembly includes several angle steels installed between two support columns, and channel steels are fixedly connected between the several angle steels. A first connecting shaft and a second connecting shaft are detachably connected between the several angle steels and the channel steels, respectively. One end of the first connecting shaft is fixedly connected to a second bolt, and one end of the second connecting shaft is provided with a second screw hole. The second bolt is threadedly connected to the inside of the second screw hole, and two reinforcing rods are connected between the several angle steels.

[0007] As a preferred solution of the present invention, the opposite surfaces of several of the support columns are fixedly connected to fixed plates, the two ends of several of the angle steels are threadedly connected to the fixed plates, the upper ends of several of the support columns are fixedly connected to receiving plates, and the jacks are installed on the upper ends of the receiving plates.

[0008] As a preferred solution of the present invention, a plurality of reinforcing plates are fixedly connected to both sides of the inner wall of the I-beam.

[0009] As a preferred solution of the present invention, a connecting plate is fixedly connected between several of the angle steels and channel steels, and positioning holes are opened on the surfaces of two of the connecting plates. The first connecting shaft and the second connecting shaft are both inserted into the positioning holes.

[0010] As a preferred solution of the present invention, clamping plates are fixedly connected to both sides of the inner walls of the upper and lower ends of the two channel steels, and clamping grooves are opened on both sides of the two reinforcing rods, and the clamping plates are clamped inside the clamping grooves.

[0011] As a preferred solution of the present invention, one end of the first connecting shaft and the second connecting shaft are both fixedly connected with an extrusion nut.

[0012] As a preferred solution of the present invention, the side surfaces of the first connecting shaft and the second connecting shaft are both provided with thread grooves, and the side surfaces of the first connecting shaft and the second connecting shaft are both threadedly connected to limit nuts through the thread grooves.

[0013] As a preferred solution of the present invention, the first connecting shaft and the second connecting shaft are both made of alloy steel.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. When the jacking device is used, the jacking device is first connected to the bridge foundation pile. At this time, the jack and the I-beam are in contact with the bottom of the bridge. The bridge is lifted by starting the jack. The threaded connection between several support columns and the jack can initially improve the stability. At the same time, the presence of the I-beam can significantly enhance its own strength. The first connecting shaft and the second connecting shaft are threadedly connected. By threading the second bolt into the second screw hole, the extrusion nut and the limit nut can be used to enhance the connection tightness between the support components. At the same time, the threaded connection between the angle steel and the fixing plate can further enhance its overall strength. The triangular structure between the angle steel and the channel steel can significantly enhance the overall compressive strength and stability of the jacking structure. Compared with the jacking device in the prior art, the present invention can significantly enhance the stability of the jacking device when jacking the bridge through the cooperation of the above structures, thereby improving the safety of the jacking device.

[0016] 2. When disassembling the jacking device, first remove the first bolt from the first screw hole, so that the support column and the jack can be disassembled, and then the angle steel and the fixing plate are disassembled, and finally the second bolt is removed from the second screw hole. At the same time, the side surfaces of the first connecting shaft and the second connecting shaft in the limit nut are removed, and the first connecting shaft and the second connecting shaft can be removed from the through hole, and then the support assembly can be disassembled. Compared with the jacking device in the prior art, the utility model can facilitate the disassembly of the jacking device through the cooperation of the above-mentioned structures, thereby improving the convenience of disassembly of each component. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a disassembled diagram of the jacking assembly structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the jack structure of the utility model;

[0020] Figure 4 This is a disassembled diagram of the support assembly structure of the utility model;

[0021] Figure 5 This is a disassembled diagram of the first connecting shaft and the second connecting shaft structure of the utility model.

[0022] In the figure: 100, lifting assembly; 101, support column; 102, jack; 103, I-beam; 104, first bolt; 105, first screw hole; 111, fixing plate; 112, receiving plate; 121, reinforcing plate; 200, supporting assembly; 201, angle steel; 202, channel steel; 203, first connecting shaft; 204, second connecting shaft; 205, second bolt; 206, second screw hole; 207, reinforcing rod; 211, connecting plate; 212, positioning hole; 221, clamping plate; 222, clamping groove; 231, extrusion nut; 241, threaded groove; 242, limit nut. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-5 The utility model provides a bridge underpinning and lifting device in a deep foundation pit excavation state, comprising a lifting assembly 100 and a supporting assembly 200;

[0025] The jacking assembly 100 includes a plurality of support columns 101, each of which has a jack 102 detachably mounted on its upper end, and an I-beam 103 detachably mounted between each of the jacks 102. A plurality of first bolts 104 are mounted on each of the support columns 101, and a plurality of first screw holes 105 are formed at the lower end of each of the jacks 102. The first bolts 104 are threadedly connected to the interior of the first screw holes 105.

[0026] The support assembly 200 includes several angle steels 201 installed between two support columns 101, and channel steels 202 are fixedly connected between the several angle steels 201. A first connecting shaft 203 and a second connecting shaft 204 are detachably connected between the several angle steels 201 and the channel steels 202. One end of the first connecting shaft 203 is fixedly connected to a second bolt 205, and one end of the second connecting shaft 204 is provided with a second screw hole 206. The second bolt 205 is threadedly connected to the inside of the second screw hole 206. Two reinforcing rods 207 are connected between the several angle steels 201.

[0027] In a specific embodiment, the jacking assembly 100 is provided in combination with the support assembly 200, which can not only lift the bridge, but also significantly improve the overall compressive strength and stability of the jacking device, thereby enhancing the safety of the jacking device. At the same time, the above-mentioned structures cooperate with each other to facilitate the disassembly of the jacking device, thereby improving the convenience of disassembly of the jacking device. When in use, the bridge can be lifted by starting the jack 102 and cooperating with the counter-support force of the support column 101. At this time, the overall compressive strength of the jacking device can be preliminarily improved by the I-beam 103. At the same time, a triangular structure formed by several angle steels 201 and channel steels 202 is formed. It can further improve the overall compressive stability of the jacking device. In addition, the first connecting shaft 203 and the second connecting shaft 204 are threadedly connected through the second bolt 205, which can tighten and fix the angle steel 201 and the channel steel 202, further enhancing the overall structural stability. Therefore, the overall compressive strength of the jacking device can be improved. During disassembly, first remove the first bolt 104 from the first screw hole 105 to disassemble the jack 102 and the support column 101, and then remove the second bolt 205 from the second screw hole 206 to disassemble the reinforcing rod 207, the angle steel 201 and the channel steel 202, thereby improving the overall disassembly convenience of the jacking device.

[0028] See also Figure 2 and Figure 3 The opposite surfaces of several support columns 101 are fixedly connected with fixed plates 111, the two ends of several angle steels 201 are threadedly connected with the fixed plates 111, the upper ends of several support columns 101 are fixedly connected with receiving plates 112, and the jacks 102 are installed on the upper ends of the receiving plates 112.

[0029] In a specific embodiment, the fixing plate 111 facilitates threaded connection between the angle steel 201 and the support column 101 , thereby improving the overall compressive strength, and also facilitates threaded disassembly of the angle steel 201 .

[0030] See also Figure 2 and Figure 3 A plurality of reinforcing plates (121) are fixedly connected to both sides of the inner wall of the I-beam (103).

[0031] In a specific embodiment, the presence of the reinforcing plate 121 can help enhance the compressive strength of the I-beam 103 .

[0032] See also Figure 4 and Figure 5 A connecting plate 211 is fixedly connected between the angle steels 201 and the channel steels 202. Positioning holes 212 are opened on the surfaces of the two connecting plates 211. The first connecting shaft 203 and the second connecting shaft 204 are inserted into the interior of the positioning holes 212.

[0033] In a specific embodiment, the positioning hole 212 facilitates installation and positioning of the first connecting shaft 203 and the second connecting shaft 204 , and the first connecting shaft 203 and the second connecting shaft 204 can be removed from the positioning hole 212 for disassembly.

[0034] See also Figure 4 and Figure 5 The inner walls of the upper and lower ends of the two channel steels 202 are fixedly connected with clamping plates 221 on both sides, and the two reinforcing rods 207 are provided with clamping grooves 222 on both sides, and the clamping plates 221 are clamped inside the clamping grooves 222.

[0035] In a specific embodiment, the reinforcing rod 207 can be easily installed by snapping the clamping plate 221 into the clamping slot 222 , and the reinforcing rod 207 can be disassembled by taking out the clamping plate 221 .

[0036] See also Figure 4 and Figure 5 One end of the first connecting shaft 203 and the second connecting shaft 204 are fixedly connected with an extrusion nut 231.

[0037] In a specific embodiment, the extrusion nut 231 and the connecting plate 211 contact each other to squeeze them, thereby enhancing the connection tightness between the angle steel 201 and the channel steel 202 on both sides.

[0038] See also Figure 4 and Figure 5 The side surfaces of the first connecting shaft 203 and the second connecting shaft 204 are both provided with a thread groove 241 , and the side surfaces of the first connecting shaft 203 and the second connecting shaft 204 are both threadedly connected to the limiting nut 242 through the thread groove 241 .

[0039] In a specific embodiment, the limiting nut 242 is threadedly connected to the side surfaces of the first connecting shaft 203 and the second connecting shaft 204 to squeeze and limit the connecting plate 211, further enhancing the overall structural strength of the jacking device.

[0040] See also Figure 4 and Figure 5 , the first connecting shaft 203 and the second connecting shaft 204 are both made of alloy steel.

[0041] In a specific embodiment, the first connecting shaft 203 and the second connecting shaft 204 made of alloy steel can enhance their own tensile strength and extend their service life.

[0042] Working principle: When in use, first connect the support column 101 and the bridge foundation pile, then start the jack 102 to cooperate with the counter-support force of the support column 101 to lift the bridge, and the I-beam 103 can initially improve the overall compressive strength of the jacking device. In addition, the triangular structure formed by several angle steels 201 and channel steels 202 can further improve the overall compressive stability of the jacking device, and the first connecting shaft 203 and the second connecting shaft 204 are threadedly connected by the second bolt 205 to connect the angle steel 201 and the channel steel 202. The threads are squeezed and fixed, which can further enhance the overall structural stability and thus improve the overall compressive strength of the jacking device. During disassembly, first remove the first bolt 104 from the first screw hole 105 to disassemble the jack 102 and the support column 101, and then remove the second bolt 205 from the second screw hole 206 to disassemble the reinforcing rod 207, the angle steel 201 and the channel steel 202, so as to facilitate the disassembly of the jacking assembly 100 and the support assembly 200, thereby improving the overall disassembly convenience of the jacking device.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bridge underpinning and lifting device in a deep foundation pit excavation state, characterized in that: include: A lifting assembly (100), wherein the lifting assembly (100) comprises a plurality of support columns (101), the upper ends of the plurality of support columns (101) are detachably mounted with jacks (102), a plurality of jacks (102) are detachably mounted with I-beams (103) between each other, a plurality of first bolts (104) are mounted on the upper ends of the plurality of support columns (101), a plurality of first screw holes (105) are opened at the lower ends of the plurality of jacks (102), and the first bolts (104) are threadedly connected to the interior of the first screw holes (105); A support assembly (200), the support assembly (200) includes a plurality of angle steels (201) installed between two support columns (101), a channel steel (202) is fixedly connected between the plurality of angle steels (201), a first connecting shaft (203) and a second connecting shaft (204) are detachably connected between the plurality of angle steels (201) and the channel steels (202), one end of the first connecting shaft (203) is fixedly connected to a second bolt (205), one end of the second connecting shaft (204) is provided with a second screw hole (206), the second bolt (205) is threadedly connected to the inside of the second screw hole (206), and two reinforcing rods (207) are connected between the plurality of angle steels (201).

2. The bridge underpinning and lifting device in a deep foundation pit excavation state according to claim 1 is characterized in that: The opposite surfaces of several support columns (101) are fixedly connected to a fixing plate (111), both ends of several angle steels (201) are threadedly connected to the fixing plate (111), the upper ends of several support columns (101) are fixedly connected to a receiving plate (112), and the jack (102) is installed on the upper end of the receiving plate (112).

3. The bridge underpinning and lifting device in a deep foundation pit excavation state according to claim 1 is characterized in that: A plurality of reinforcing plates (121) are fixedly connected to both sides of the inner wall of the I-beam (103).

4. The bridge underpinning and lifting device in a deep foundation pit excavation state according to claim 1 is characterized in that: A connecting plate (211) is fixedly connected between the plurality of angle steels (201) and the channel steels (202), and a positioning hole (212) is provided on the surface of the two connecting plates (211), and the first connecting shaft (203) and the second connecting shaft (204) are both inserted into the positioning holes (212).

5. The bridge underpinning and lifting device in a deep foundation pit excavation state according to claim 1 is characterized in that: A clamping plate (221) is fixedly connected to both sides of the inner walls of the upper and lower ends of the two channel steels (202), and a clamping groove (222) is opened on both sides of the two reinforcing rods (207), and the clamping plate (221) is clamped inside the clamping groove (222).

6. The bridge underpinning and lifting device in a deep foundation pit excavation state according to claim 1 is characterized in that: One end of each of the first connecting shaft (203) and the second connecting shaft (204) is fixedly connected with an extrusion nut (231).

7. The bridge underpinning and lifting device in a deep foundation pit excavation state according to claim 1 is characterized in that: The side surfaces of the first connecting shaft (203) and the second connecting shaft (204) are both provided with thread grooves (241), and the side surfaces of the first connecting shaft (203) and the second connecting shaft (204) are both threadedly connected to the limiting nuts (242) through the thread grooves (241).

8. The bridge underpinning and lifting device in a deep foundation pit excavation state according to claim 1 is characterized in that: The first connecting shaft (203) and the second connecting shaft (204) are both made of alloy steel.

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