Auxiliary positioning device for sinking deep-water steel cofferdams on inclined rock surfaces

Abstract

This application discloses an auxiliary positioning device for sinking deep-water steel cofferdams on inclined rock surfaces. The device is suitable for sinking steel cofferdams partially located on inclined rock surfaces and includes: multiple casings surrounding the steel cofferdam, with some casings extending below the rock surface into hard strata; positioning piles installed inside the casings; lateral positioning elements mounted on the positioning piles to restrict the lateral position of the steel cofferdam; and longitudinal positioning elements mounted on the positioning piles to restrict the longitudinal position of the steel cofferdam. Positioning piles are cast inside the casings, and the lateral and longitudinal positioning elements are installed onto their corresponding piles. During sinking, the lateral positioning elements contact the front and rear sides of the steel cofferdam, and the two longitudinal positioning elements contact the left and right sides, respectively. The limiting effect of the lateral and longitudinal positioning elements improves the stability of the steel cofferdam during sinking.

Description

Technical Field

[0001] This application relates to the field of sinking auxiliary devices, and in particular to a sinking auxiliary positioning device for deep-water steel cofferdams used on inclined rock surfaces. Background Technology

[0002] The GZSG-3 section of the new Zhuhai-Zhaoqing High-Speed ​​Railway Gaoming-Zhaoqing East section's pre-station engineering project spans from DK25+565 to DK41+207.817, with a total length of 15.643km. The Xijiang Grand Bridge is located between Yong'an Town and Shapu Town in Zhaoqing City, Guangdong Province. Approximately 3.5km downstream of the existing Xijiang Grand Bridge on the Jiangzhao Expressway, it crosses the main channel of the Xijiang River as a three-tower cable-stayed bridge with spans of (70+148+435+435+148+70)m. It is the largest span among the three-tower steel box girder cable-stayed bridges along the high-speed railway and is a key and challenging project controlling the entire line.

[0003] Some of the main piers of the Xijiang Grand Bridge are underwater piers. The foundations of the underwater piers are constructed using a method of first building a platform, then pile foundations, and finally cofferdams. Due to the fact that some foundation locations are on sloping rock surfaces, the positioning and sinking of the cofferdams are very difficult.

[0004] In existing technologies, the position and verticality of steel cofferdams are determined by cameras and intelligent analysis systems, and the steel cofferdams are adjusted by power correction mechanisms such as jacks. However, because some foundations are located on inclined rock surfaces, it is difficult to control the sinking of the steel cofferdams, resulting in a large positional deviation of the steel cofferdams.

[0005] Therefore, it is necessary to propose an auxiliary positioning device for sinking deep-water steel cofferdams on inclined rock surfaces to ensure the stable sinking of the steel cofferdams, which has become an important technical problem that urgently needs to be solved. Utility Model Content

[0006] This application provides an auxiliary positioning device for sinking deep-water steel cofferdams on inclined rock surfaces, aiming to solve the problem that in the prior art, some foundation locations are on inclined rock surfaces, making the positioning and sinking of cofferdams difficult.

[0007] To achieve the above objectives, this application proposes an auxiliary positioning device for sinking deep-water steel cofferdams on inclined rock surfaces. The sinking auxiliary positioning device is suitable for the sinking construction of steel cofferdams partially located on inclined rock surfaces, and includes: multiple casings, which are arranged around the steel cofferdam, with the casings extending below the rock surface to a hard stratum; positioning piles, which are installed inside the casings; lateral positioning elements, which are installed on the positioning piles to limit the lateral position of the steel cofferdam; and longitudinal positioning elements, which are installed on the positioning piles to limit the longitudinal position of the steel cofferdam.

[0008] In some embodiments, the positioning pile includes a steel reinforcement cage, which includes a plurality of vertical main bars spaced apart and stirrups connecting the vertical main bars.

[0009] In some embodiments, the system further includes: connecting bars, with connecting bars provided at the bottom of both the transverse and longitudinal positioning members; and a connecting sleeve, through which the connecting bars connect to the vertical main reinforcement of the positioning pile.

[0010] In some embodiments, it further includes: a clearance groove, wherein clearance grooves are provided on both the lateral positioning member and the longitudinal positioning member.

[0011] In some embodiments, the device further includes a through hole, wherein the portion of the casing disposed below the rock surface has a through hole.

[0012] This application proposes an auxiliary positioning device for sinking deep-water steel cofferdams on inclined rock surfaces. The device is suitable for sinking steel cofferdams partially located on inclined rock surfaces and includes: multiple casings surrounding the steel cofferdam, with the casings partially positioned below the rock surface; positioning piles inside the casings; lateral positioning elements mounted on the positioning piles to restrict the lateral position of the steel cofferdam; and longitudinal positioning elements mounted on the positioning piles to restrict the longitudinal position of the steel cofferdam. Before sinking the steel cofferdam, holes are drilled in the rock surface to place the casings, and positioning piles are cast inside the casings. The lateral and longitudinal positioning elements are then installed onto their corresponding positioning piles. During sinking, the lateral positioning elements contact the front and rear sides of the steel cofferdam, and the two longitudinal positioning elements contact the left and right sides. The limiting effect of the lateral and longitudinal positioning elements improves the stability of the steel cofferdam during sinking and helps control the sinking process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a front view of an auxiliary positioning device for sinking a deep-water steel cofferdam on an inclined rock surface, according to one embodiment of this application. Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A magnified view of a section at point B in the middle; Figure 4 This is a top view of an auxiliary positioning device for sinking a deep-water steel cofferdam on an inclined rock surface, according to one embodiment of this application.

[0014] In the diagram: 1. Steel cofferdam; 2. Positioning pile; 21. Vertical main reinforcement; 3. Rock surface; 4. Foundation pile; 5. Connecting sleeve; 61. Longitudinal positioning component; 62. Horizontal positioning component; 63. Connecting reinforcement; 64. Casing; 7. Through hole; 71. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0016] See Figure 1 and Figure 4 As shown, this application proposes an auxiliary positioning device for sinking a deep-water steel cofferdam on an inclined rock surface. The sinking auxiliary positioning device is suitable for the sinking construction of a steel cofferdam 1 partially located on an inclined rock surface 3, and includes: multiple casings 7, which are arranged around the steel cofferdam 1, with the casings 7 extending partially to the hard strata below the rock surface 3; positioning piles 2, which are set inside the casings 7; a lateral positioning member 63, which is set on the positioning piles 2 to limit the lateral position of the steel cofferdam 1; and a longitudinal positioning member 61, which is set on the positioning piles 2 to limit the longitudinal position of the steel cofferdam 1.

[0017] The rock surface 3 includes a flat rock surface 3 and an inclined rock surface 3. The steel cofferdam 1 is roughly square. Casings 7 are installed at intervals on the left and right sides and the front and rear sides of the steel cofferdam 1. During the forming of the casings 7, an impact drilling machine is used to treat the riverbed rock surface 3. After the steel casings 7 are successfully lowered, the impact drilling machine is used to follow up the casing 7 until the hole is formed.

[0018] Concrete is delivered into the casing 7 via a vertical duct using pressure difference to form the pile body of the positioning pile 2. During construction, the concrete is continuously poured into the duct to prevent the positioning pile 2 from breaking. The width of the steel cofferdam 1 is transverse, and its length is longitudinal.

[0019] Among them, the lateral positioning component 63 and the longitudinal positioning component 61 are the core structures of the sinking auxiliary positioning device. There are two lateral positioning components 63 and two longitudinal positioning components 61. The two lateral positioning components 63 are respectively set on the front and rear sides of the steel cofferdam 1, and the two longitudinal positioning components 61 are respectively set on the left and right sides of the steel cofferdam 1. During the sinking process, the lateral positioning components 63 contact the front and rear sides of the steel cofferdam 1 respectively, and the two longitudinal positioning components 61 contact the left and right sides of the steel cofferdam 1 respectively.

[0020] Specifically, before the sinking of the steel cofferdam 1, holes for placing the casing 7 are drilled in the rock surface 3, and positioning piles 2 are poured inside the casing 7. Lateral positioning components 63 and longitudinal positioning components 61 are then installed onto the corresponding positioning piles 2. During the sinking process, the lateral positioning components 63 contact the front and rear sides of the steel cofferdam 1, respectively, and the two longitudinal positioning components 61 contact the left and right sides of the steel cofferdam 1, respectively. The limiting effect of the lateral positioning components 63 and longitudinal positioning components 61 enhances the stability of the steel cofferdam 1 during the sinking process, thus facilitating control of the sinking process.

[0021] The steel cofferdam 1 contains several foundation piles 4, which are used to form the underwater piers of the Xijiang Grand Bridge.

[0022] See Figure 1 and Figure 2 As shown, in some embodiments, the positioning pile 2 includes a steel reinforcement cage, which includes a plurality of vertical main bars 21 spaced apart and stirrups connecting the vertical main bars 21. The positioning pile 2 is preferably a pipe pile, with the vertical main bars 21 arranged at intervals along the circumference. The stirrups are connected to the vertical main bars 21 by welding to maintain the diameter of the steel reinforcement cage formed by the vertical main bars 21. The steel reinforcement cage greatly improves the tensile, bending, and shear resistance of the positioning pile 2, perfectly combining the natural compressive strength of concrete with the tensile strength of steel bars, transforming the bridge pile from a fragile "stone pillar" into a robust "reinforced concrete beam-column" capable of bearing various complex loads.

[0023] See Figure 1 and Figure 2 As shown, in some embodiments, it further includes: a connecting rib 64, with connecting ribs 64 provided at the bottom of both the transverse positioning member 63 and the longitudinal positioning member 61; both the transverse positioning member 63 and the longitudinal positioning member 61 are stainless steel structures, and their bottoms are connected to the connecting rib 64 by welding. A connecting sleeve 5 is provided, through which the connecting rib 64 connects to the vertical main reinforcement 21 of the positioning pile 2. The connecting sleeve 5 is preferably a welded sleeve, which connects the vertical main reinforcement 21 to the connecting rib 64, thereby connecting the transverse positioning member 63 and the longitudinal positioning member 61 to the positioning pile 2.

[0024] In this embodiment, a concrete column is also provided between the transverse positioning member 63 and the longitudinal positioning member 61 and the positioning pile 2. The diameter of the concrete column is equal to or slightly smaller than the diameter of the positioning pile 2. The concrete column is directly cast after the wooden formwork is erected. The compressive strength of the concrete column reduces the stress on the connecting reinforcement 64 and the vertical main reinforcement 21. Furthermore, the concrete column helps to prevent the connecting reinforcement 64 and the vertical main reinforcement 21 from being corroded.

[0025] See Figure 1 and Figure 4As shown, in some embodiments, it further includes: a clearance groove 62, which is provided on both the transverse positioning member 63 and the longitudinal positioning member 61. The clearance groove 62 is provided on the side of the transverse positioning member 63 and the longitudinal positioning member 61 closest to the steel cofferdam 1. The setting of the clearance groove 62 firstly helps to reduce the weight and manufacturing cost of the transverse positioning member 63 and the longitudinal positioning member 61, and facilitates the installation of the transverse positioning member 63 and the longitudinal positioning member 61. Secondly, the clearance groove 62 also provides installation space for dynamic correction structures such as jacks, which facilitates the adjustment of the attitude of the steel cofferdam 1 during the sinking process.

[0026] See Figure 1 and Figure 3 As shown, in some embodiments, it further includes: a through hole 71, wherein the portion of the casing 7 located below the rock surface 3 has the through hole 71. The through hole 71 is located near the bottom end of the casing 7. The riverbed rock surface 3 is treated using an impact drilling rig, and then the casing 7 is placed. At this time, the through hole 71 on the casing 7 is located below the rock surface 3. The setting of the through hole 71 facilitates the flow of a small amount of concrete grout into the gap between the casing 7 and the rock under the action of gravity, thereby improving the stability of the finally formed positioning pile 2.

[0027] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. An auxiliary positioning device for sinking a deep-water steel cofferdam on an inclined rock surface, the auxiliary positioning device being applicable to the sinking construction of a steel cofferdam (1) partially located on an inclined rock surface (3), characterized in that, include: Multiple casings (7) are arranged around the steel cofferdam (1), and the casings (7) extend partially below the rock surface (3) to the hard stratum; Positioning pile (2), the positioning pile (2) is set inside the casing (7); A lateral positioning element (63) is provided on the positioning pile (2) to limit the lateral position of the steel cofferdam (1); A longitudinal positioning element (61) is provided on the positioning pile (2) to limit the longitudinal position of the steel cofferdam (1).

2. The auxiliary positioning device for sinking deep-water steel cofferdams on inclined rock surfaces according to claim 1, characterized in that, The positioning stake (2) includes: The steel reinforcement cage includes a plurality of vertical main bars (21) spaced apart and stirrups connecting the vertical main bars (21).

3. The auxiliary positioning device for sinking deep-water steel cofferdams on inclined rock surfaces according to claim 2, characterized in that, Also includes: Connecting rib (64), the bottom of the transverse positioning member (63) and the longitudinal positioning member (61) are both provided with the connecting rib (64). Connecting sleeve (5), the connecting bar (64) is connected to the vertical main bar (21) of the positioning pile (2) through the connecting sleeve (5).

4. The auxiliary positioning device for sinking deep-water steel cofferdams on inclined rock surfaces according to claim 1, characterized in that, Also includes: The clearance groove (62) is provided on both the transverse positioning member (63) and the longitudinal positioning member (61).

5. The auxiliary positioning device for sinking deep-water steel cofferdams on inclined rock surfaces according to claim 1, characterized in that, Also includes: Through hole (71), the through hole (71) is provided on the part of the casing (7) located below the rock surface (3).

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