A floating suction cylinder pile foundation stabilization platform

Abstract

This utility model discloses a water-based suction cylinder type pile foundation stabilization platform, including a suction cylinder truss and multiple pile grippers. The suction cylinder truss includes a long suction cylinder, N short suction cylinders, and N+1 suction cylinder steel pipes. The long suction cylinder and the N short suction cylinders are distributed circumferentially at intervals with their top surfaces flush. The N+1 suction cylinder steel pipes are vertically arranged and centrally fixed to the top surface of each short suction cylinder. A bottom connecting beam is vertically connected between the bottom sidewalls of every two adjacent suction cylinder steel pipes, and a top truss is vertically connected between the top sidewalls of every two adjacent suction cylinder steel pipes. One or both ends of the top truss extend outward along its length to form multiple pile gripper connecting beams adapted to the pile driving position. Multiple pile grippers are respectively set on the end side of each pile gripper connecting beam. This stabilization platform has a fast positioning speed, simple construction process, and can effectively measure and control multiple parameters during the pile driving operation, resulting in high construction efficiency and high pile driving accuracy.

Description

Technical Field

[0001] This utility model relates to the field of marine photovoltaic construction technology, and in particular to a water-based suction cylinder pile foundation stabilization platform. Background Technology

[0002] Due to their advantages such as high bearing capacity, convenient construction, and strong adaptability, steel pipe piles have been widely used in construction engineering. Offshore engineering foundations often use steel pipe piles, and some structures use small to medium-sized steel pipe piles as pile group foundations, such as offshore wind turbine jacket foundations, pier foundations, and offshore photovoltaic foundations. The relative position and relative elevation requirements are quite strict to ensure the accurate installation of the superstructure.

[0003] Currently, the construction of small and medium-sized offshore pipe pile group foundations mostly employs methods such as piling vessels, crane vessels with pile grippers, and crane vessels with pile stabilizing frames. While piling vessels offer high construction efficiency, they are susceptible to wind and waves, making verticality control difficult. Using pile grippers mounted on the side of crane vessels, with the crane simultaneously lifting the pile hammer for pile driving, is also easily affected by wind and waves, making both horizontal position and verticality control difficult. Therefore, both methods suffer from the problem of insufficient accuracy in meeting specifications and design requirements after pipe pile construction, leading to the inability to install the superstructure. While the process of first installing the pile stabilizing frame and then using a crane vessel to lift the pile hammer for pile driving offers higher construction accuracy, current pile stabilizing frames face significant challenges in controlling horizontal position accuracy, resulting in lower construction efficiency. Based on the problems of existing technologies, it is necessary to propose a floating suction cylinder type pile stabilizing platform for group pile foundations that can quickly locate and precisely control horizontal position. Utility Model Content

[0004] The purpose of this utility model is to provide a water-based suction cylinder pile foundation stabilization platform that solves the above-mentioned technical problems.

[0005] Therefore, the technical solution of this utility model is as follows:

[0006] A floating suction cylinder type pile foundation stabilization platform includes a suction cylinder truss and multiple pile grippers. The suction cylinder truss comprises a long suction cylinder, N short suction cylinders, and N+1 suction cylinder steel pipes. The long suction cylinder and the N short suction cylinders are distributed circumferentially at intervals with their top surfaces flush. The N+1 suction cylinder steel pipes are vertically arranged and centrally fixed to the top surface of each suction cylinder. A bottom connecting beam is fixedly connected between the bottom sidewalls of every two adjacent suction cylinder steel pipes, and a top truss is fixedly connected between the top sidewalls, giving the suction cylinder truss a three-dimensional frame structure. One or both ends of each top truss extend outward to form multiple pile gripper connecting beams adapted to the pile driving position. The multiple pile grippers are respectively... Each pile gripper is installed on the end side of the connecting beam. The pile gripper includes a fixed arm and a rotating arm. The fixed arm is fixed to the end side of the connecting beam with its opening facing outwards. The rotating arm is located at the opening of the fixed arm and is hinged to the fixed arm at one end. A hydraulic cylinder is installed on the fixed arm on the side connected to the rotating arm. The end of the cylinder's movable push rod is connected to the rotating arm, causing the rotating arm to reciprocate horizontally under the action of the extension and retraction of the movable push rod of the hydraulic cylinder, thereby opening or closing the opening of the fixed arm. Multiple push cylinders are evenly distributed along the circumference on the top surface of the pile gripper. They are fixed to the top surfaces of the fixed arm and the rotating arm respectively with their movable push rods facing the center of the pile gripper.

[0007] Furthermore, multiple reinforcing ribs are evenly distributed along the circumference of each suction cylinder steel pipe, arranged vertically in a radial pattern; each reinforcing rib is fixed to the side wall and the top surface of the suction cylinder steel pipe respectively.

[0008] Furthermore, the top openings of the long and short suction cylinders are centered, so that the top opening of each suction cylinder is connected to the inner cavity of the suction cylinder steel pipe above it, realizing the water and air exchange between the suction cylinder steel pipe and the suction cylinder, so that the suction cylinder can be charged and discharged by water and air through the top of the suction cylinder steel pipe.

[0009] Furthermore, the bottom connecting beam consists of two parallel long beams spaced apart at different heights, and several connecting beams arranged in a straight line along their length and fixed between the two long beams; the two ends of the two long beams are respectively vertically fixed to the bottom sidewalls of the suction cylinder steel pipe located on both sides.

[0010] Furthermore, the top truss includes a horizontally arranged strip truss, with the top end of the suction cylinder steel pipe inserted and fixed to the end side of the strip truss; a steel plate is laid on the top surface of the strip truss, and guardrails are symmetrically arranged along the length direction at both sides of the top surface of the strip truss.

[0011] Furthermore, a diagonal bracing truss is provided between each top truss and the suction cylinder steel pipe to which it is connected and fixed. The diagonal bracing truss is set diagonally, and its two ends are fixed to the bottom of the top truss and the upper side wall of the suction cylinder steel pipe, respectively.

[0012] Furthermore, protective fences are installed on both sides of the top surface of the pile driver connecting beam, as well as on the outer edges of the top surface of the fixed arm and the rotating arm, and the protective fences on both sides of the fixed arm are fixedly connected to the protective fences on both sides of the connected pile driver connecting beam.

[0013] Furthermore, the floating suction cylinder pile foundation stabilization platform also includes a measurement and positioning system; the measurement and positioning system consists of two GNSS receivers, two total stations, and two inclinometers; wherein, the two GNSS receivers are respectively set at a set of diagonal positions on the top of the suction cylinder truss, the two total stations are symmetrically and centrally set on the two top trusses of the suction cylinder truss, and the two inclinometers are symmetrically and centrally set on the other two top trusses of the suction cylinder truss.

[0014] Compared with existing technologies, this floating suction cylinder pile foundation stabilization platform has the advantages of fast positioning speed for the floating suction cylinder pile foundation stabilization platform and each steel pipe pile in terms of structural design, and simple construction process. In addition, during the pile driving operation, parameters such as the plane position, levelness, elevation and verticality of the stabilization platform and pipe piles can be effectively measured and controlled. It can also adapt to the pile driving needs of small and medium-sized pipe pile foundations with different diameters and different layouts, and has the advantages of improved construction efficiency and high pile driving accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the pile driving of the water-based suction cylinder pile foundation stabilization platform of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the water-based suction cylinder pile foundation stabilization platform of this utility model. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention.

[0018] See Figure 1 and Figure 2 The underwater suction cylinder pile foundation stabilization platform consists of a suction cylinder truss, a pile gripper, and a measurement and positioning system.

[0019] According to the construction design, the pile foundation consists of four steel pipe piles 9. In this embodiment, the suction cylinder truss includes one long suction cylinder 1, three short suction cylinders 2, and four suction cylinder steel pipes 3. The long suction cylinder 1 and the three short suction cylinders 2 are distributed circumferentially with their top surfaces flush. The four suction cylinder steel pipes 3 are vertically arranged and fixed in the center on the top surfaces of the long suction cylinder 1 and the three short suction cylinders 2, respectively. A bottom connecting beam 5 is vertically connected between the bottom sidewalls of each two adjacent suction cylinder steel pipes 3, and a top truss 6 is vertically connected between the top sidewalls of each two adjacent suction cylinder steel pipes 3, so that the suction cylinder truss forms a cubic frame structure with a rectangular cross-section.

[0020] In this suction cylinder truss, the long suction cylinder 1 and the three short suction cylinders 2 are arranged with their top surfaces flush. This allows for single-point positioning by having the bottom of the long suction cylinder 1 contact the seabed mud surface first. At this time, the bottom of the three short suction cylinders 2 is still at a distance from the seabed mud surface, which facilitates flexible adjustment of the overall position of the suction cylinder truss. After accurately positioning the long suction cylinder 1, the falling position of the three short suction cylinders 2 can be accurately adjusted by rotating the suction cylinder truss as a whole, with the single-point positioning position of the long suction cylinder 1 as the center point.

[0021] To facilitate the control of the floating and sinking states of each suction cylinder, the top openings of the long suction cylinder 1 and the short suction cylinder 2 are centered, so that the top opening of each suction cylinder is connected to the inner cavity of the suction cylinder steel pipe 3 above it, realizing the water and air communication between the suction cylinder steel pipe 3 and the suction cylinder. This allows for control at the top of the suction cylinder steel pipe 3 to flush water and inflate or depress water and air into each suction cylinder. In practical applications, by installing water pumps and air pumps on the top truss 6, operators can independently control the sinking and floating of each suction cylinder at the top of the suction cylinder truss, thereby adjusting the pressure inside the suction cylinder and assisting in the sinking and lifting of the suction cylinders.

[0022] As a preferred technical solution of this embodiment, multiple reinforcing ribs 4 are evenly distributed in the circumferential direction of each suction cylinder steel pipe 3, and are arranged vertically in a radial pattern; the two vertical edges of each reinforcing rib 4 are respectively welded and fixed to the side wall of the suction cylinder steel pipe 3 and the top surface of the suction cylinder, so as to enhance the connection strength between the suction cylinder steel pipe 3 and the suction cylinder below it.

[0023] The bottom connecting beam 5 consists of two parallel long beams spaced at different heights, and several connecting beams arranged in parallel and fixed between the two long beams along their length. The connecting beam consists of two short beams that are crossed and fixedly connected, with their upper and lower ends fixedly connected to the side walls of the two long beams respectively. The two ends of the two long beams are vertically fixed to the bottom side walls of the suction cylinder steel pipe 3 located on both sides of them.

[0024] The top truss 6 includes a horizontally arranged strip truss. Two suction cylinder steel pipes 3, which are fixedly connected to both ends of the top truss 6, are inserted through and fixed to the two ends of the top truss 6, specifically fixed to multiple truss beams on the ends of the top truss 6. The top surface of the strip truss is covered with steel plates, and guardrails are symmetrically arranged along the length of both sides of the top surface. This allows the top truss 6 to serve as a suction cylinder truss in addition to being used to form a suction cylinder truss, and also as a construction platform for setting up construction equipment and for construction workers to carry out their work activities.

[0025] As a preferred technical solution of this embodiment, a diagonal bracing truss 7 is provided between each top truss 6 and the suction cylinder steel pipe 3 that is connected and fixed thereto. The diagonal bracing truss 7 is arranged diagonally, and its two ends are respectively fixed to the bottom of the top truss 6 and the upper side wall of the suction cylinder steel pipe 3.

[0026] In this embodiment, the bottom connecting beam 5, the top truss 6, and the diagonal bracing truss 7 are all steel truss structures to facilitate welding and fixing.

[0027] Depending on the pile driving location, one or both ends of the top truss 6 extend outward along its length to form a pile gripper connecting beam, ensuring that the pile gripper 8 is connected and fixed to the outside of the suction cylinder truss, avoiding motion interference between the steel pipe pile 9 and the suction cylinder truss during the pile driving operation; wherein, the length of the pile gripper connecting beam is adapted to the distance between the pile driving design location and the suction cylinder truss, to ensure that the installation position of the pile gripper 8 is on the same axis as the pile driving design location.

[0028] In this embodiment, according to the construction design, the pile foundation consists of four steel pipe piles 9. The two ends of the top trusses 6 in the length direction of the suction cylinder truss extend outward along their length direction to form four pile gripper connecting beams. Protective fences are set on both sides of the top surface of each pile gripper connecting beam. Correspondingly, four pile grippers 8 are provided, which are respectively set on the ends of the four pile gripper connecting beams.

[0029] The pile gripper 8 includes a fixed gripping arm 8-1 and a rotating gripping arm 8-2; wherein,

[0030] The fixed arm 8-1 is a C-shaped truss structure with a horizontal cross section. It is welded and fixed to the end face of the pile driver connecting beam of the top truss 6 with the opening facing outward. The opening size of the fixed arm 8-1 is larger than the outer diameter of the steel pipe pile 9, so that the steel pipe pile 9 can be fed into the inside of the fixed arm 8-1.

[0031] The rotating arm 8-2 is a truss structure whose length is adapted to the opening size of the fixed arm 8-1. It is set at the opening of the fixed arm 8-1 and one end is hinged to the fixed arm 8-1, allowing the rotating arm 8-2 to reciprocate in the horizontal direction, thereby controlling the opening or closing of the fixed arm 8-1 opening. A hydraulic cylinder is set on the top surface of the fixed arm 8-1 on the side connected to the rotating arm 8-2. The cylinder is set with its movable push rod facing the rotating arm 8-2. The cylinder barrel is fixed to the top surface of the fixed arm 8-1, and the end of its movable push rod is fixed to the rotating arm 8-2 and close to the other end of the rotating arm 8-2, so that the force generated by the movable push rod and the corresponding lever arm length meet the requirements of driving the rotating arm 8-2 to reciprocate. In practical applications, the hydraulic cylinder controls the pile gripper 8 to switch between the open and closed states by extending the movable push rod outward or retracting the movable push rod inward.

[0032] In this embodiment, protective railings are provided on the outer edges of the top surfaces of both the fixed arm 8-1 and the rotating arm 8-2, and the protective railings on both sides of each fixed arm 8-1 are connected and fixed to the protective railings on both sides of the connected beam of the pile driver.

[0033] Four jacking cylinders are evenly distributed along the circumferential direction on the top surface of the pile gripper 8. When the rotating arm 8-2 is closed at the opening of the fixed arm 8-1, the four cylinders are horizontally arranged with the movable push rod facing the center of the pile gripper 8. Among them, three jacking cylinders are arranged at intervals and fixed on the top surface of the fixed arm 8-1 through the cylinder barrel, and the other jacking cylinder is arranged in the center and fixed on the top surface of the rotating arm 8-2 through the cylinder barrel.

[0034] In practical applications, the rotating arm 8-2 rotates outward under the action of the extended movable push rod of the arm cylinder, opening the opening of the fixed arm 8-1. At this time, the steel pipe pile 9 is fed into the fixed arm 8-1 through the hoisting equipment. Then, the rotating arm 8-2 rotates inward under the action of the retracted movable push rod of the arm cylinder, closing the opening of the fixed arm 8-1. Next, by controlling the four jacking cylinders to extend their movable push rods outward, the movable push rods of the four cylinders are made to vertically abut against the outer wall of the steel pipe pile 9 to vertically limit the steel pipe pile 9 and ensure that the steel pipe pile 9 is driven downward in a vertical state. At the same time, the steel pipe pile 9 can also be finely adjusted in the driving position by using the different extension lengths of the movable push rods of the four jacking cylinders, that is, the planar position and verticality of the steel pipe pile 9 can be finely adjusted respectively.

[0035] The measurement and positioning system consists of two GNSS receivers 10, two total stations 11, and two inclinometers 12. The two GNSS receivers 10 are positioned diagonally at the top of the suction cylinder truss, specifically fixed to the top truss 6. After initialization via the GNSS receivers mounted on the construction environment platform, they can be used to measure the planar position and elevation of the suction cylinder truss, as well as the planar position of the pipe piles. The two total stations 11 are symmetrically and centrally positioned at the top of the suction cylinder truss, specifically fixed to two parallel top trusses 6. They are used to measure the verticality and top elevation of the pipe piles. The two inclinometers 12 are symmetrically and centrally positioned at the top of the suction cylinder truss, specifically fixed to two other parallel top trusses 6. They are used to measure the horizontality of the suction cylinder truss.

[0036] See Figure 1 The specific implementation steps of the pile driving operation method for small and medium-sized pipe pile group foundations using this floating suction cylinder pile group foundation stabilization platform are as follows:

[0037] S1. The crane ship lifts the water-based suction cylinder pile foundation stabilization platform and gradually lowers it below the water surface; two GNSS receivers 10 read the coordinates of the center point of the top surface of the long suction cylinder 1. After verifying that the coordinates are correct, the water-based suction cylinder pile foundation stabilization platform is lowered further, so that the long suction cylinder 1 is inserted to a certain depth below the mud surface, and the position of the long suction cylinder 1 is temporarily fixed.

[0038] S2. The crane vessel controls the boom tilt angle and steering, causing the water-based suction cylinder pile foundation stabilization platform to begin rotating around the long suction cylinder 1 as the rotation center. During the rotation, two GNSS receivers 10 read the coordinates of the top center point of any short suction cylinder 2. After verification, the water-based suction cylinder pile foundation stabilization platform continues to be lowered, causing the short suction cylinder 2 to be inserted to a certain depth below the mud surface.

[0039] S3. The crane vessel continues to lower the water-based suction cylinder pile foundation stabilization platform, so that the long suction cylinder 1 and the three short suction cylinders 2 continue to be inserted below the mud surface and stabilized under the self-weight of the stabilization platform.

[0040] S4. By draining and venting the suction cylinder, the water-based suction cylinder pile foundation stabilization platform continues to be inserted deeper into the mud surface. During this process, the levelness of the water-based suction cylinder pile foundation stabilization platform is read by two inclinometers 12. If there is a deviation in levelness, water or air can be pumped into the suction cylinder steel pipe to assist the suction cylinder at a higher position to continue sinking. Alternatively, a crane can be used to lift the pile hammer and press it onto the suction cylinder steel pipe 3 at a higher position, relying on the weight of the pile hammer to make the suction cylinder at a higher position continue to sink until the levelness meets the requirements.

[0041] S5. Control the hydraulic cylinder of one pile gripper 8 to drive the rotating gripper 8-2 to rotate outward, opening the opening of the fixed gripper 8-1; after the crane ship lifts the steel pipe pile 9 and feeds it into the fixed gripper 8-1, continue to control the hydraulic cylinder of the gripper to drive the rotating gripper 8-2 to rotate inward, closing the opening of the fixed gripper 8-1; then, read the planar position parameters of the steel pipe pile 9 through two GNSS receivers 10 and read the verticality parameters of the pipe pile through two total stations 11, and use the different extension lengths of the piston rods of the four jacking cylinders to fine-tune the planar position and verticality of the steel pipe pile 9 until the planar position and verticality requirements are met;

[0042] S6. The crane ship lifts the pile hammer to drive the pile. During the pile driving process, two total stations 10 read the verticality parameters of the steel pipe pile 9 in real time to ensure the quality of pile driving. When the steel pipe pile 9 is driven to a position close to the design elevation, the two total stations 10 read the top elevation parameters of the steel pipe pile 9 to achieve verticality and elevation control of the steel pipe pile 9.

[0043] S7. Repeat steps S5 and S6 above until all steel pipe piles 9 in the pile group foundation are driven. Control each boom cylinder to drive the corresponding rotating boom 8-2 to rotate outward, open the opening of the fixed boom 8-1, so that the crane ship can lift the pile stabilizing platform above the pile top, and then move it horizontally away. If lifting difficulties occur during this process, air can be injected into the suction cylinder through the suction cylinder steel pipe 3 to help the pile stabilizing platform float up by buoyancy. The crane ship can then move the pile stabilizing platform to the next pile group foundation position by anchoring and winching, and then continue to position and drive the next pile group foundation.

[0044] It should be noted that the parts of this utility model not disclosed in detail belong to the well-known technology in this field; in addition, although the illustrative specific embodiments of this utility model have been described above to facilitate understanding of this utility model by those skilled in the art, it should be clear that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious, and all utility model creations utilizing the concept of this utility model are subject to protection.

Claims

1. A suction caisson group pile foundation stabilizing platform on water, characterized by, The system includes a suction cylinder truss and multiple pile grippers (8); wherein, the suction cylinder truss includes a long suction cylinder (1), N short suction cylinders (2) and N+1 suction cylinder steel pipes (3), the long suction cylinder (1) and the N short suction cylinders (2) are distributed circumferentially at intervals with their top surfaces flush, and the N+1 suction cylinder steel pipes (3) are vertically arranged and fixed in the center on the top surface of each suction cylinder; a bottom connecting beam (5) is fixedly connected between the bottom side walls of each two adjacent suction cylinder steel pipes (3), and a top truss (6) is fixedly connected between the top side walls, so that the suction cylinder truss has a three-dimensional frame structure; one or both ends of each top truss (6) extend outward to form multiple pile gripper connecting beams adapted to the pile driving position; multiple pile grippers (8) are respectively set on the end side of each pile gripper connecting beam; the pile gripper (8) includes a fixed gripper arm (8- 1) and rotating arm (8-2), fixed arm (8-1) is fixed to the end of the connecting beam of the pile gripper with the opening facing outwards, rotating arm (8-2) is set at the opening of fixed arm (8-1) and one end is hinged to fixed arm (8-1); a gripper cylinder is set on the fixed arm (8-1) on the side connected to rotating arm (8-2), and its movable push rod end is connected to rotating arm (8-2), so that rotating arm (8-2) reciprocates in the horizontal direction under the action of the movable push rod extension and retraction movement of gripper cylinder, so as to open or close the opening of fixed arm (8-1); multiple push cylinders are evenly distributed along the circumferential direction on the top surface of pile gripper (8), and they are fixed on the top surface of fixed arm (8-1) and rotating arm (8-2) respectively with movable push rods facing the center of pile gripper (8).

2. A suction pile group foundation stability platform above water according to claim 1, characterized in that, Multiple reinforcing ribs (4) are evenly distributed along the circumference of each suction cylinder steel pipe (3), and are arranged vertically in a radial pattern; each reinforcing rib (4) is fixed to the side wall of the suction cylinder steel pipe (3) and the top surface of the suction cylinder.

3. The suction pile group foundation stability platform on water according to claim 1, characterized in that, The top openings of the long suction cylinder (1) and the short suction cylinder (2) are centered, so that the top opening of each suction cylinder is connected to the inner cavity of the suction cylinder steel pipe (3) above it, so that water and air filling and emptying operations can be performed on the suction cylinder through the top of the suction cylinder steel pipe (3).

4. The suction pile group foundation stability platform above water according to claim 1, characterized in that, The bottom connecting beam (5) consists of two parallel long beams that are spaced apart at the top and bottom, and several connecting beams that are arranged in a line along the length of the two beams and fixed between the two long beams; the two ends of the two long beams are respectively vertically fixed to the bottom side wall of the suction cylinder steel pipe (3) located on both sides.

5. The suction pile group foundation stability platform above water according to claim 1, characterized in that, The top truss (6) includes a horizontally arranged strip truss, with the top end of the suction cylinder steel pipe (3) inserted and fixed to the end side of the strip truss; a steel plate is laid on the top surface of the strip truss, and guardrails are symmetrically arranged along the length direction on both sides of the top surface of the strip truss.

6. The suction pile group foundation stability platform above water according to claim 1, characterized in that, A diagonal bracing truss (7) is provided between each top truss (6) and the suction cylinder steel pipe (3) that is connected and fixed thereto. The diagonal bracing truss (7) is set diagonally, and its two ends are fixed to the bottom of the top truss (6) and the upper side wall of the suction cylinder steel pipe (3), respectively.

7. The underwater suction cylinder pile foundation stabilization platform according to claim 1, characterized in that, Protective fences are installed on both sides of the top surface of the pile driver connecting beam, as well as on the outer edges of the top surface of the fixed arm (8-1) and the rotating arm (8-2). The protective fences on both sides of the fixed arm (8-1) are fixedly connected to the protective fences on both sides of the connected pile driver connecting beam.

8. The suction pile group foundation stability platform above water according to claim 1, characterized in that, It also includes a measurement and positioning system; the measurement and positioning system consists of two GNSS receivers (10), two total stations (11) and two inclinometers (12); wherein, the two GNSS receivers (10) are respectively set at a set of diagonal positions on the top of the suction cylinder truss, the two total stations (11) are symmetrically and centrally set on the two top trusses (6) on the top of the suction cylinder truss, and the two inclinometers (12) are symmetrically and centrally set on the other two top trusses (6) on the top of the suction cylinder truss.

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