Trestle and construction platform construction method

Abstract

The invention provides a trestle and construction platform construction method, which comprises the following steps of: transporting a guide frame to a designed position, and inserting and driving a steel pipe pile; building an anchor pile construction platform, and starting to construct an anchor pile; then an upper structure of the anchor pile construction platform is dismantled, and a lifting lowering system is installed; lowering the guide frame to a designed elevation, and welding a stiffening plate between the guide frame and the steel pipe pile; the lifting and lowering system is dismantled, and a gap between the bottom of the guide frame outer sleeve and the steel pipe pile is blocked; concrete is poured or cement mortar is pressed and injected between the guide frame outer sleeve and the steel pipe pile; cutting redundant parts of the steel pipe piles, mounting pile caps, and continuing to construct other upper structures. According to the method, the guide frame is firstly transported to the corresponding design position to determine the position of the lifting and lowering system, the situation that the guide frame cannot be lowered in place subsequently is avoided, the occupied time for positioning the guide frame and the lifting and lowering system is greatly shortened, the investment of large floating crane equipment is saved, and the engineering construction cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge trestle platform erection, and in particular relates to a trestle and construction platform construction method. Background Art

[0002] At present, during the construction stage of the pier and construction platform, it is necessary to set up the guide device before construction. During the operation of the lifting and lowering system, a large number of manual labor is used for construction, which is not only time-consuming, labor-intensive, and inefficient, but also has poor synchronization of lowering. Because the position of the guide device cannot be accurately observed during the rising and falling tides, the lowering position of the pier and construction platform is inaccurate, resulting in low installation accuracy and high safety hazards in water operations. During the offshore construction process, affected by various factors such as wind, tides, waves and water currents, shaking will occur during the lowering process, which will inevitably affect the lowering accuracy. The lowering accuracy of the guide frame directly affects the stability and safety of the pier platform. It is extremely necessary to strictly control the lowering accuracy of the guide frame. Summary of the invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a construction method for a trestle and a construction platform.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A method for constructing a trestle and a construction platform comprises the following steps:

[0006] S1. Transport the guide frame to the designed location and insert the steel pipe piles;

[0007] S2, set up the anchor pile construction platform and start the anchor pile construction;

[0008] S3. After the anchor pile construction is completed, the transport ship will be driven away, the upper structure of the anchor pile construction platform will be dismantled, and the lifting and lowering system will be installed;

[0009] S4. Lower the guide frame to the designed elevation and weld the stiffening plate between the guide frame and the steel pipe pile;

[0010] S5. Remove the lifting and lowering system and seal the gap between the bottom of the outer sleeve of the guide frame and the steel pipe pile;

[0011] S6. Pour concrete or inject cement mortar between the outer casing of the guide frame and the steel pipe pile;

[0012] S7, after the concrete or cement mortar constructed in step S6 reaches the designed strength, cut the excess part of the steel pipe pile, install the pile cap, and continue to construct other superstructures.

[0013] Furthermore, in step 1, the guide frame is transported to the designed position by a transport ship.

[0014] Furthermore, in step 1, the steel pipe piles are driven into the rock 1 to 2 cm.

[0015] Furthermore, in step 1, the transport ship is accurately positioned before the steel pipe piles are driven in.

[0016] Furthermore, in step 5, a water-stopping capsule is installed at the bottom of the outer sleeve of the guide frame, and cement mortar is injected into the water-stopping capsule to seal the gap between the outer sleeve and the steel pipe pile.

[0017] Further, in step 5, cement mortar is injected into the water-stop capsule through the grouting pipe.

[0018] Furthermore, in step 6, when cement is used to seal the gap between the outer casing and the steel pipe pile, ensure that the filling is dense.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The invention adopts the method of first transporting the guide frame to the corresponding designed position to determine the position of the lifting and lowering system, so as to avoid the situation that the subsequent guide frame cannot be lowered into place, and arranges the work of determining the position of the guide frame before installing the lifting and lowering system, which greatly reduces the time occupied by positioning the guide frame and the lifting and lowering system, saves the investment in large-scale floating equipment, and reduces the cost of engineering construction. The guide frame provides a construction platform for establishing the lifting and lowering system, and can also be used as a trestle connection system directly in the subsequent trestle platform construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of the construction of step 1 of the present invention;

[0023] Figure 2 This is a construction diagram of step 2 of the present invention;

[0024] Figure 3 This is a schematic diagram of the construction of step 3 of the present invention;

[0025] Figure 4 This is a construction diagram of step 4 of the present invention;

[0026] Figure 5 This is a schematic diagram of the construction of step 5 of the present invention;

[0027] Figure 6 This is a construction diagram of step 6 of the present invention;

[0028] Figure 7The present invention creates a construction schematic diagram of step 7. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0033] A trestle and construction platform construction method, such as Figures 1 to 7 As shown, the following steps are included:

[0034] S1, transport the guide frame 1 to the designed position and insert the steel pipe pile 2;

[0035] S2, set up the anchor pile construction platform 7, arrange the impact drill on the temporary construction platform, use the impact drill to punch the anchor pile, and after the punching is completed, lower the steel cage and pour the anchor pile concrete;

[0036] S3. After the anchor pile construction is completed, leave the transport ship, dismantle the upper structure of the anchor pile construction platform, and install the lifting and lowering system. In an optional embodiment, the lifting and lowering system includes four jacks that perform lifting or lowering actions synchronously. The four jacks lift and work together synchronously to improve the installation quality of the pier platform and effectively ensure the installation accuracy of the pier platform underwater.

[0037] S4, lower the guide frame to the designed elevation, and weld a stiffening plate 4 between the guide frame and the steel pipe pile;

[0038] S5. Remove the lifting and lowering system and seal the gap between the bottom of the outer sleeve of the guide frame and the steel pipe pile;

[0039] S6. Pour concrete or inject cement mortar between the outer casing of the guide frame and the steel pipe pile;

[0040] S7, after the concrete or cement mortar constructed in step S6 reaches the designed strength, cut the excess part of the steel pipe pile, install the pile cap, and continue to construct other superstructures.

[0041] In step 1, the guide frame is transported to the designed position by the transport ship 3. In step 1, the steel pipe piles are driven into the rock 1 to 2 cm. In step 1, the steel pipe piles are driven after the transport ship is accurately positioned. In step 5, a water-stop capsule 5 is installed at the bottom of the outer casing of the guide frame, and cement mortar is injected into the water-stop capsule to seal the gap between the outer casing and the steel pipe piles. In step 5, cement mortar is injected into the water-stop capsule through the grouting pipe 6. In step 6, when using cement to seal the gap between the outer casing and the steel pipe pile, ensure that the filling is dense, and transform the guide frame into a connection system between the pier and the construction platform.

[0042] The invention adopts the method of first transporting the guide frame to the corresponding design position to determine the position of the lifting and lowering system, so as to avoid the situation that the subsequent guide frame cannot be lowered into place. The work of determining the position of the guide frame is arranged before installing the lifting and lowering system, which greatly reduces the time occupied by the positioning of the guide frame and the lifting and lowering system, realizes the accurate, fast and efficient installation of the trestle platform, improves the construction efficiency, and ensures the stability and safety of the trestle platform. At the same time, it can also effectively save the investment in large floating equipment and reduce the cost of engineering construction. The guide frame provides a construction platform for establishing the lifting and lowering system, and can also be used as a trestle connection system directly for the subsequent trestle platform construction.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for constructing a trestle and a construction platform, characterized in that: The steps include: S1. Transport the guide frame to the designed location and insert the steel pipe piles; S2, set up the anchor pile construction platform and start the anchor pile construction; S3. After the anchor pile construction is completed, the transport ship will be driven away, the upper structure of the anchor pile construction platform will be dismantled, and the lifting and lowering system will be installed; S4. Lower the guide frame to the designed elevation and weld the stiffening plate between the guide frame and the steel pipe pile; S5. Remove the lifting and lowering system and seal the gap between the bottom of the outer sleeve of the guide frame and the steel pipe pile; S6. Pour concrete or inject cement mortar between the outer casing of the guide frame and the steel pipe pile; S7, after the concrete or cement mortar constructed in step S6 reaches the designed strength, cut the excess part of the steel pipe pile, install the pile cap, and continue to construct other superstructures.

2. A method for constructing a trestle and a construction platform according to claim 1, characterized in that: In step 1, the guide frame is transported to the designed position by a transport ship.

3. A method for constructing a trestle and a construction platform according to claim 1, characterized in that: In step 1, the steel pipe piles are driven into the rock 1 to 2 cm.

4. A method for constructing a trestle and a construction platform according to claim 1, characterized in that: In step 1, the transport ship is accurately positioned before the steel pipe piles are driven in.

5. The method for constructing a trestle and a construction platform according to claim 1, characterized in that: In step 6, when using cement to seal the gap between the outer casing and the steel pipe pile, ensure that it is filled densely.

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