Bridge foundation pile lifting reinforcing steel sleeve box structure and construction method thereof

Abstract

The present application belongs to the technical field of bridge reinforcement engineering, and particularly relates to a steel sleeve box structure for lifting pile reinforcement of bridge foundation and a construction method thereof. The present application provides a steel sleeve box structure for lifting pile reinforcement of bridge foundation, which comprises two extension plate units, two closed plate units and four water stop belts, so that: 1. The steel sleeve box structure can be fully screwed and fixed on the pile cap, and has high installation stability; 2. The four splicing positions between the steel sleeve box structure and the pile cap are all provided with water stop belts, so that the steel sleeve box cofferdam has good sealing and waterproof permeability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bridge reinforcement engineering, and particularly relates to a steel casing structure for bridge foundation pile lifting reinforcement and a construction method thereof. BACKGROUND

[0002] Bridge foundation pile lifting reinforcement refers to a common method for reinforcing bridge support structure. The bridge foundation generally refers to the pile cap, and the pile lifting reinforcement refers to connecting a new pile cap on the old pile cap and setting a new pile foundation on the new pile cap. Finally, the old pile foundation and the new pile foundation together can achieve a more stable bridge support effect.

[0003] On the other hand, the new pile cap also needs a water and soil retaining structure, i.e. the steel casing structure, during the pouring construction. Therefore, the old pile cap and the steel casing structure need sufficient installation stability and sufficient waterproof performance.

[0004] For example, the Chinese utility model patent with the patent announcement number CN203188223U and the announcement date of 2013.09.11 discloses a bottomless double-wall steel casing that realizes 100% dry operation recovery. The bottomless double-wall steel casing is a closed cofferdam connected by a plurality of independent box bodies arranged around the pile cap in water. The adjacent independent box bodies are connected by flanges. Each independent box body includes a lower steel casing unit and a plurality of upper steel casing units. The lower steel casing unit and the upper steel casing units are connected by flanges from bottom to top.

[0005] The bottomless double-wall steel casing in the utility model patent is connected by flanges between the partition plates and the independent box bodies, which ensures that the demolition work is completed at one time only in the dry operation environment, has high construction efficiency, and is convenient to assemble and disassemble.

[0006] However, the steel casing has at least the following two deficiencies in actual use, which are also the technical problems to be solved by the present application:

[0007] 1. The lower steel casing unit and the pile cap are only connected by hoisting corbels and hoisting ropes, so that the entire steel casing has the problem of insufficient installation stability on the pile cap and is prone to lateral shaking.

[0008] 2. The lower steel casing unit and the pile cap also lack sufficient sealing and waterproof performance, which leads to insufficient water and soil retaining strength of the cofferdam.

[0009] Therefore, in view of the above, there is an urgent need for a new type of steel casing structure that can be stably installed on the pile cap and fully sealed for use in pile lifting reinforcement construction work. SUMMARY

[0010] The application provides a steel sleeve box structure for pile lifting and reinforcement of a bridge foundation, which comprises two extension plate units, two closing plate units and four water stop belts.

[0011] In addition, the application further discloses a construction method of the steel sleeve box structure, so that the steel sleeve box structure can be orderly installed, fully fixed and fully sealed.

[0012] The application solves the above problems by adopting the technical scheme of a steel sleeve box structure for pile lifting and reinforcement of a bridge foundation, which comprises two extension plate units respectively screw-connected on two transverse bridge end surfaces of a bearing platform, two closing plate units respectively screw-connected on two longitudinal bridge side surfaces of the bearing platform and connected with the extension plate units, and four water stop belts respectively arranged between the bearing platform and the two extension plate units and between the two closing plate units.

[0013] Further preferably, the extension plate unit and / or the closing plate unit is further provided with a cable-stayed plate unit for connecting a bridge pier.

[0014] Further preferably, the extension plate unit comprises end surface bolts arranged on the bearing platform, end surface bottom plates arranged on the end surface bolts and clamping the water stop belts, extension plates arranged on the end surface bottom plates and used for pouring new bearing platforms, and end surface vertical plates arranged on the extension plates.

[0015] Further preferably, the closing plate unit comprises side surface bolts arranged on the bearing platform, side surface bottom plates arranged on the side surface bolts and clamping the water stop belts, and side surface vertical plates arranged on the side surface bottom plates and used for connecting the extension plates and the end surface vertical plates.

[0016] Further preferably, the closing plate unit further comprises expansion plates arranged between the side surface bottom plates and the side surface vertical plates and connecting the extension plates and the end surface vertical plates.

[0017] Further preferably, the cable-stayed plate unit comprises a transverse screwing plate arranged on the extension plate or the expansion plate, a vertical screwing plate arranged on the bridge pier, and a cable-stayed plate arranged on the transverse screwing plate and the vertical screwing plate.

[0018] Further preferably, the extension plate is provided with 1-2 cable-stayed plate units, and the expansion plate is provided with 2-4 cable-stayed plate units.

[0019] Further preferably, the extension plate and the expansion plate are arranged on the upper end surface of the new pile foundation.

[0020] Further preferably, the water stop belt is provided with bolt insertion holes.

[0021] A construction method of a steel casing structure for lifting and reinforcing a bridge foundation pile, sequentially comprising the following steps:

[0022] S1, respectively screwing and installing 2 extension plate units and a plurality of water stop belts on the two transverse bridge end surfaces of the pile cap;

[0023] S2, respectively screwing and installing 2 closure plate units and a plurality of water stop belts on the two longitudinal bridge side surfaces of the pile cap;

[0024] S3, performing a first sealing and waterproof operation between the internal single plates of the extension plate unit and the closure plate unit;

[0025] S4, performing a second sealing and waterproof operation between the extension plate unit and the closure plate unit to obtain the steel casing structure. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the use mode of the present application.

[0027] Figure 2 It is a schematic diagram of the position structure of the extension plate unit in the present application.

[0028] Figure 3 It is a schematic diagram of one installation position of the water stop belt in the present application.

[0029] Figure 4 It is a schematic diagram of the first structure of the closure plate unit in the present application.

[0030] Figure 5 It is a schematic diagram of the position and shape of the expansion plate in the present application from the perspective of the top view.

[0031] Figure 6 It is a schematic diagram of the position of the two new pile foundations in the present application.

[0032] Figure 7 It is a schematic diagram of the second structure of the closure plate unit in the present application from the perspective of the top view.

[0033] Figure 8 It is a schematic diagram of the first installation position of the inclined pull plate unit in the present application.

[0034] Figure 9 It is a schematic diagram of the second installation position of the inclined pull plate unit in the present application from the perspective of the top view.

[0035] In the figure, the meanings of the respective marks are as follows:

[0036] Pile cap a, pier b, new pile cap c, new pile foundation d, pile foundation e;

[0037] Extension plate unit 1, closing plate unit 2, water stop 3, inclined pull plate unit 4, spliced joint 5;

[0038] End face bolt 101, end face bottom plate 102, extension plate 103, end face vertical plate 104, side face bolt 201, side face bottom plate 202, side face vertical plate 203, enlarged plate 204, transverse bolted plate 401, vertical bolted plate 402, inclined plate 403. DETAILED DESCRIPTION

[0039] The following description is merely exemplary of the present application and is not intended to limit the scope of the application.

[0040] As shown in the accompanying drawings, Figures 1-9 A steel casing structure for lifting pile reinforcement of bridge foundation, comprising 2 extension plate units 1 respectively bolted on the two transverse bridge end faces of a pile cap a, 2 closing plate units 2 respectively bolted on the two longitudinal bridge sides of the pile cap a and connected with the extension plate units 1, and 4 water stops 3 respectively arranged between the pile cap a and the two extension plate units 1 and between the two closing plate units 2.

[0041] In this embodiment, the essence of the steel casing structure is a spliced bottomed steel casing cofferdam. The "spliced" feature is not only reflected between the extension plate units 1 and the closing plate units 2, but also reflected in the respective interiors of the extension plate units 1 and the closing plate units 2. In other words, the spliced joint 5 is the existing common single plate with holes, U-shaped plate with holes and bolt.

[0042] In addition, the spliced joint 5, as well as the spliced joints of the extension plate units 1 and the closing plate units 2, can also be provided with the water stops 3, thereby finally improving the waterproof sealing performance of the entire steel casing cofferdam.

[0043] Furthermore, the bottom plate opening referred to by the "bottomed" word is the position of the pile cap a, and the new pile cap c can be poured at the bottom plate opening and connected with the original pile cap a, and then the filling support block is arranged between the prefabricated or already poured new pile foundation d and the new pile cap c, so that the new pile foundation d can support the entire bridge together with the original pile foundation e, which is the essence of the lifting pile reinforcement method.

[0044] Finally, the plan view shapes of the steel casing structure and the pile cap a are both rectangular, and the long side directions of the two rectangles are both transverse bridge directions. The two vertical faces of the pile cap a perpendicular to the transverse bridge direction have an area smaller than that of the two vertical faces perpendicular to the longitudinal bridge direction, so the former is called "end face" and the latter is called "side face".

[0045] The extension plate unit 1 and / or the closure plate unit 2 is further provided with a cable-stayed plate unit 4 for connecting the pier b.

[0046] In the present embodiment, the cable-stayed plate unit 4 is used to assist in reinforcing the extension plate unit 1 and / or the closure plate unit 2 on the fixed pier b, and the cable-stayed plate unit 4 is also removed and reused after the pile lifting and reinforcement construction is completed, like the extension plate unit 1 and the closure plate unit 2.

[0047] In addition, the installation position of the cable-stayed plate unit 4 on the extension plate unit 1 and the closure plate unit 2 is the splicing joint 5, and the installation method is to use the splicing bolt at the splicing joint 5, so that the disassembly and assembly speed of the entire steel box structure can be greatly improved.

[0048] The extension plate unit 1 comprises an end face bolt 101 arranged on the bearing platform a, an end face bottom plate 102 arranged on the end face bolt 101 and clamping the water stop belt 3, an extension plate 103 arranged on the end face bottom plate 102 and used for pouring a new bearing platform c, and an end face vertical plate 104 arranged on the extension plate 103.

[0049] In the present embodiment, the first size style of the extension plate unit 1 is that the end face vertical plate 104 and the extension plate 103 are equal in width, at this time, the volume of the steel box structure is relatively small, and the closure plate unit 2 is entirely attached to the side surface of the bearing platform a.

[0050] The advantage of the first size style is that the screw connection and fixing structure of the steel box structure on the bearing platform a can be relatively simple, and the required fixing support strength is relatively low. However, the disadvantage is that in the pile lifting and reinforcement construction, the new bearing platform c is not wide enough and can only be extended and protruded in the transverse bridge direction, so that only the new pile foundation d in the transverse bridge direction can be increased, that is, the new pile foundation d on the upper and lower sides of the bearing platform a, so that the strength of the pile lifting and reinforcement operation is reduced. Figure 5

[0051] The closure plate unit 2 comprises a side face bolt 201 arranged on the bearing platform a, a side face bottom plate 202 arranged on the side face bolt 201 and clamping the water stop belt 3, and a side face vertical plate 203 arranged on the side face bottom plate 202 and used for connecting the extension plate 103 and the end face vertical plate 104.

[0052] In the present embodiment, the first structure style of the closure plate unit 2 corresponds to the first size style of the extension plate unit 1, at this time: the closure plate unit 2 is a vertical planar plate, the side face vertical plate 203 simultaneously connects the extension plate 103 and the end face vertical plate 104, and the steel box structure is relatively slender. ​

[0053] On the other hand, the specifications of the side bolts 201 and the end bolts 101 are consistent, and they can be mixedly used. The end bottom plate 102 and the side bottom plate 202 are both provided with multiple rows of bolt mounting holes.

[0054] The closed plate unit 2 further comprises an expansion plate 204 arranged between the side bottom plate 202 and the side vertical plate 203 and connecting the extension plate 103 and the end vertical plate 104.

[0055] In the embodiment, the second structure of the closed plate unit 2 is that the width of the steel sleeve box structure is increased by the expansion plate 204. At this time, the width of the end vertical plate 104 is the sum of the width of the extension plate 103 and the width of the expansion plate 204.

[0056] At this time, the original pile foundation e can be replaced by the new pile foundation d, so as to ensure that the pile lifting reinforcement method has a more comprehensive reinforcement support area and greater reinforcement support strength.

[0057] The inclined pull plate unit 4 comprises a transverse screw plate 401 arranged on the extension plate 103 or the expansion plate 204, a vertical screw plate 402 arranged on the pier b, and an inclined plate 403 arranged on the transverse screw plate 401 and the vertical screw plate 402.

[0058] In the embodiment, the transverse screw plate 401 and the vertical screw plate 402 are both provided with bolt mounting holes. The bolts on the transverse screw plate 401 are the splicing bolts at the splicing joint 5.

[0059] On the pier b, an annular steel sleeve is arranged, the annular steel sleeve is provided with a threaded groove, and the vertical screw plate 402 is provided with a plurality of bolts for connecting the threaded groove.

[0060] The extension plate 103 is provided with 1-2 inclined pull plate units 4, and the expansion plate 204 is provided with 2-4 inclined pull plate units 4.

[0061] In the embodiment, the size area of the expansion plate 204 is larger than that of the extension plate 103, so that more inclined pull plate units 4 are needed for the expansion plate 204.

[0062] The extension plate 103 and the expansion plate 204 are arranged on the upper end surface of the new pile foundation d.

[0063] In this embodiment, the new pile foundation d is prefabricated in the factory or is cast before the new pile cap c is cast, and the new pile foundation d is only used to assist in supporting the extension plate 103 and the expansion plate 204, the new pile foundation d is provided with a corbel for screwing the extension plate 103 or the expansion plate 204, or the extension plate 103 and the expansion plate 204 are directly placed on the new pile foundation d.

[0064] In summary, the auxiliary supporting effect of the new pile foundation d does not affect the disassembly operation of the steel box structure. Finally, the vertical gap between the new pile foundation d and the new pile cap c can be supplemented by the existing cushion, support seat and other structures.

[0065] The water stop belt 3 is provided with a bolt insertion hole.

[0066] In this embodiment, the single water stop belt 3 is installed transversely, and a column is vertically arranged, that is, 3-8 water stop belts 3 are arranged on each vertical surface of the pile cap a, so as to ensure that it is fully fixed by the end face bolt 101 or the side face bolt 201, and the blocking waterproof effect is more sufficient.

[0067] In addition, the second shape of the water stop belt 3 is annular, that is, the entire water stop belt 3 is wrapped on the pile cap a, and then fixed by the end face bolt 101 and the side face bolt 201, so that the waterproof sealing performance of the steel box structure is better.

[0068] A construction method of a steel box structure of a bridge foundation pile lifting and reinforcement, sequentially comprising the following steps:

[0069] S1, two extension plate units 1 and a plurality of sections of the water stop belt 3 are respectively screwed and installed on the two transverse end surfaces of the pile cap a;

[0070] S2, two closure plate units 2 and a plurality of sections of the water stop belt 3 are respectively screwed and installed on the two longitudinal side surfaces of the pile cap a;

[0071] S3, the first sealing and waterproof operation is performed between the inner single plates of the extension plate unit 1 and the closure plate unit 2;

[0072] S4, the second sealing and waterproof operation is performed between the extension plate unit 1 and the closure plate unit 2, and the steel box structure is obtained.

[0073] In this embodiment, the extension plate unit 1 and the closure plate unit 2 are first spliced on the shore, and then are respectively installed on the pile cap a. In S3 and S4, the water stop belt 3 can be used to achieve the sufficient sealing effect of the "plate interior" and "between the plates".

[0074] Finally, when the new bearing platform c is poured, the extension plate unit 1 and the closing plate unit 2 can be independently disassembled, at this time, the extension plate unit 1 and the closing plate unit 2 can be taken out by oblique upward lifting, so that the extension plate unit 1 and the closing plate unit 2 will not hit the new pile foundation d.

[0075] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various modifications can be made within the knowledge of those skilled in the art in the technical field without departing from the gist of the present application. These are modifications without creativity, and are protected by the patent law within the scope of the claims of the present application.

Claims

1. A steel casing structure for pile lifting and reinforcement of a bridge foundation, characterized in that: Two extension plate units (1) are respectively screwed on two transverse bridge end faces of the bearing platform (a), two closing plate units (2) are respectively screwed on two longitudinal bridge side faces of the bearing platform (a) and connect the extension plate units (1), and four water stops (3) are respectively arranged between the bearing platform (a) and the two extension plate units (1) and between the two closing plate units (2), The extension plate unit (1) and / or the closing plate unit (2) are further provided with a cable-stayed plate unit (4) for connecting the pier (b), The extension plate unit (1) comprises an end face bolt (101) arranged on the bearing platform (a), an end face bottom plate (102) arranged on the end face bolt (101) and clamping the water stop (3), an extension plate (103) arranged on the end face bottom plate (102) and used for pouring a new bearing platform (c), and an end face vertical plate (104) arranged on the extension plate (103), The closing plate unit (2) comprises a side face bolt (201) arranged on the bearing platform (a), a side face bottom plate (202) arranged on the side face bolt (201) and clamping the water stop (3), and a side face vertical plate (203) arranged on the side face bottom plate (202) and used for connecting the extension plate (103) and the end face vertical plate (104), The closing plate unit (2) further comprises an expansion plate (204) arranged between the side face bottom plate (202) and the side face vertical plate (203) and connecting the extension plate (103) and the end face vertical plate (104), The cable-stayed plate unit (4) comprises a transverse screwing plate (401) arranged on the extension plate (103) or the expansion plate (204), a vertical screwing plate (402) arranged on the pier (b), and a diagonal plate (403) arranged on the transverse screwing plate (401) and the vertical screwing plate (402), The extension plate (103) and the expansion plate (204) are arranged on the upper end face of a new pile foundation (d).

2. The steel casing structure for pile lifting and reinforcing of a bridge foundation according to claim 1, characterized in that: One to two cable-stayed plate units (4) are arranged on the extension plate (103), and two to four cable-stayed plate units (4) are arranged on the expansion plate (204).

3. The steel casing structure for pile lifting and reinforcing of a bridge foundation according to claim 1, characterized in that: The water stop (3) is provided with a bolt insertion hole.

4. A method of constructing a steel casing structure for pile lifting and reinforcement of a bridge foundation according to claim 1, characterized in that The steps are as follows: S1, two extension plate units (1) and a plurality of water stops (3) are respectively screwed on two transverse bridge end faces of the bearing platform (a); S2, two closing plate units (2) and a plurality of water stops (3) are respectively screwed on two longitudinal bridge side faces of the bearing platform (a); S3, a first sealing and waterproof operation is performed between the internal single plates of the extension plate unit (1) and the closing plate unit (2); S4, a second sealing and waterproof operation is performed between the extension plate unit (1) and the closing plate unit (2), and the steel sleeve box structure is obtained.

Images