Underwater non-insertion type latticed column supporting foundation system convenient to disassemble

Abstract

The utility model discloses an underwater non-plug-in latticed column supporting foundation system convenient to disassemble, which comprises a strip-shaped foundation and an embedded steel plate positioned in the strip-shaped foundation, and further comprises a latticed column steel pipe, and is characterized in that a steel sleeve is sleeved outside the latticed column steel pipe and is connected with the embedded steel plate in a full welding manner; lubricating oil is brushed on the latticed column steel pipe in the height range of the bottom steel sleeve, the latticed column steel pipe is annularly wrapped with linoleum and fixed, a gap between the steel sleeve and the linoleum wrapped outside the latticed column steel pipe is filled with cement paste, and the cement paste is used for limiting horizontal movement of the latticed column steel pipe. According to the utility model, the rigid connection of the traditional latticed column and the foundation is optimized into the flexible connection of the steel sleeve, so that the problem that the wading non-insertion type latticed column support is inconvenient to cut and dismantle underwater after construction is effectively solved, the water dismantling of the wading non-insertion type latticed column support is realized, the construction is convenient, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to an underwater non-insertion type lattice column supported and dismantled foundation system. Background Art

[0002] The lattice column support system is widely used in the construction of prefabricated bridges. When there is no water, a concrete strip foundation is generally used, with embedded steel plates in the foundation. The lattice column steel pipes are welded to the embedded steel plates. When there is water, the lattice column steel pipes are generally directly inserted underwater and penetrated into the soil.

[0003] With the development of cities, the demand for municipal road networks has increased, and working conditions such as tunnels passing under bridges have gradually emerged. During the construction process of this working condition, when the river channel needs to be kept open, the only method of alternating construction of half-width cofferdams can be adopted. The temporary support of the lattice column falls above the tunnel roof and cannot be directly inserted into the riverbed. The lattice column can only be constructed in the form of a strip foundation above the tunnel structure. The temporary support of the lattice column of the first phase cofferdam is located underwater when it is dismantled after the bridge is built. If the traditional foundation system of lattice column steel pipes and embedded steel plates is used, underwater cutting is required, which is inconvenient to construct and the cost is high. Therefore, there is an urgent need for an underwater non-insertion lattice column support dismantling foundation system to realize the water dismantling of the non-insertion lattice column support in water. Utility Model Content

[0004] The utility model aims to address the deficiencies in the prior art and provides an underwater non-insertion lattice column support easily dismantled foundation system, comprising a strip foundation and an embedded steel plate within the strip foundation, and also comprising a lattice column steel pipe, characterized in that: the lattice column steel pipe is sleeved with a steel casing on the outside, the steel casing is fully welded to the embedded steel plate, the lattice column steel pipe is coated with lubricating oil within the height range of the bottom steel casing, and is annularly wrapped with felt and fixed, the gap between the steel casing and the felt wrapped around the lattice column steel pipe is filled with cement slurry, and the cement slurry is used to limit the horizontal movement of the lattice column steel pipe.

[0005] Preferably, the asphalt felt is fully arranged in an annular manner within the height range of the steel casing at the bottom of the lattice column steel pipe.

[0006] Preferably, the lubricating oil is fully distributed between the lattice column steel pipe and the outer covering felt.

[0007] Preferably, stainless steel hoops are circumferentially arranged on the outer side of the lattice column steel pipe covered with tarpaulin for fixing the tarpaulin, and the stainless steel hoops are vertically arranged every 50 cm.

[0008] Compared with the prior art, the utility model has the following beneficial effects: the utility model has a steel casing slightly larger than the lattice column steel pipe as the main body, the steel casing is fully welded to the pre-buried steel plate of the foundation, the lattice column steel pipe is lubricated at the bottom of the steel casing height range, the felt is wrapped around and fixed, and then the lattice column support is hoisted as a whole and inserted into the steel casing, and the gap between the steel casing and the felt wrapped outside the lattice column steel pipe is filled with cement slurry. The utility model optimizes the rigid connection between the traditional lattice column and the foundation into a flexible connection of the steel casing, effectively solving the problem of inconvenient underwater cutting and removal of the water-borne non-insertion lattice column support after construction, and realizes the water removal of the water-borne non-insertion lattice column support, and the construction is convenient and cost-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0010] Figure 1 This is the elevation view of the utility model;

[0011] Figure 2 It is a detailed elevation view of the utility model;

[0012] Figure 3 It is the plan view of the utility model;

[0013] Figure 4 It is a detailed plan view of the utility model;

[0014] Figure 5 This is a schematic diagram of the application of the utility model.

[0015] In the figure: 1. Lattice column steel pipe; 2. Lubricating oil; 3. Felt; 4. Stainless steel hoops; 5. Cement slurry; 6. Steel casing; 7. Embedded steel plate; 8. Strip foundation; 9. Tunnel roof. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is described in detail below with reference to the accompanying drawings, but the protection scope of the utility model is not limited to the embodiments.

[0017] Reference Figures 1 to 5The utility model discloses an underwater non-insertion lattice column support and dismantling foundation system, comprising a strip foundation 8 and a pre-buried steel plate 7 located in the strip foundation 8, and also comprising a lattice column steel pipe 1, wherein the lattice column steel pipe 1 is externally sleeved with a steel casing 6, wherein the steel casing is fully welded to the pre-buried steel plate 7, wherein the lattice column steel pipe 1 is coated with lubricating oil 2 within the height range of the bottom steel casing 6, and annularly wrapped with asphalt felt 3 and fixed, wherein the gap between the steel casing 6 and the lattice column steel pipe 1 outer asphalt felt 3 is filled with cement slurry 5, wherein the cement slurry 5 is used to limit the horizontal movement of the lattice column steel pipe 1, wherein the outer side of the lattice column steel pipe 1 outer asphalt felt 3 is annularly provided with a stainless steel hoop 4 for fixing the asphalt felt 3, wherein in the utility model, the material of the steel casing 6 is similar to that of the lattice column steel pipe 1 is consistent, the diameter of the steel casing 6 should be larger than the lattice column steel pipe 1, and the height is controlled according to the stability requirements of the lattice column. The steel casing 6 is fully welded to the pre-buried steel plate 7 of the foundation; the cement slurry 5 is located between the steel casing 6 and the outer tarpaulin 3 of the lattice column steel pipe 1, which is used to fill the gap and limit the horizontal movement of the lattice column steel pipe 1; the stainless steel hoop 4 is circumferentially arranged on the outer side of the tarpaulin 3 of the lattice column steel pipe 1, and one is arranged every 50 cm vertically, which is used to fix the tarpaulin 3; the tarpaulin 3 is fully arranged circumferentially within the height range of the steel casing 6 at the bottom of the lattice column steel pipe 1, which is used to isolate the lattice column steel pipe 1 from the cement slurry 5; the lubricating oil 2 is fully arranged between the lattice column steel pipe 1 and the outer tarpaulin 3, and an oily lubricating oil 2 is used to facilitate the removal of the lattice column steel pipe 1.

[0018] Compared with the strip foundation 8 supported by traditional lattice columns, the lattice column steel pipe 1 is directly welded to the foundation embedded steel plate 7. The utility model optimizes the rigid connection between the lattice column steel pipe 1 and the foundation into a flexible connection with a steel casing 6. Specifically, the steel casing 6 which is slightly larger than the lattice column steel pipe 1 is used as the main body, and the steel casing 6 is fully welded to the foundation embedded steel plate 7. The lattice column steel pipe 1 is coated with oily lubricating oil 2 within the height range of the bottom steel casing 6, and is annularly wrapped with asphalt felt 3 and fixed with stainless steel hoops 4. The lattice column support is then hoisted as a whole and inserted into the steel casing 6. The gap between the steel casing 6 and the lattice column steel pipe 1 is filled with cement slurry 5. When it is demolished after the bridge is built, the above-water part of the lattice column is first cut and removed, and then the individual ones are pulled out one by one, so as to realize the above-water demolition of the water-borne non-insertion lattice column support.

[0019] The construction steps of this utility model are as follows:

[0020] Step 1: In the first cofferdam stage, after the tunnel top plate 9 in the cofferdam is completed, the strip foundation 8 is directly placed on the top plate 9 of the underpass tunnel, and a steel plate 7 is embedded on the top surface of the strip foundation 8.

[0021] Step 2: The steel casing 6 is fully connected to the embedded steel plate 7 by welding.

[0022] Step 3: Assemble the lattice column supports. Apply oily lubricant 2 to the lattice column steel pipe 1 within the height range of the bottom steel casing 6, and wrap it with felt 3 in an annular direction in time, and fix it with stainless steel hangers.

[0023] Step 4: The integrally hoisted lattice column support is inserted into the steel casing 6, and the gap between the steel casing 6 and the lattice column steel pipe 1 wrapped with asphalt felt 3 is filled with cement slurry 5.

[0024] Step 5: After the bridge is erected within the scope of the first-phase cofferdam, it is switched to the second-phase cofferdam. Some temporary supports of the lattice columns inside the first-phase cofferdam are in a wading state. When they are to be dismantled after the bridge is completed, the above-water part of the lattice columns is first cut and dismantled, and then the steel pipes are pulled out one by one.

[0025] As above, although the utility model has been shown and described with reference to a specific preferred embodiment, it should not be interpreted as limiting the utility model itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the utility model defined in the attached claims.

Claims

1. An underwater non-insertion lattice column supported and dismantled foundation system, comprising a strip foundation and a pre-buried steel plate located in the strip foundation, and also comprising a lattice column steel pipe, characterized in that: The lattice column steel pipe is externally sleeved with a steel casing, and the steel casing is fully welded to the embedded steel plate. The lattice column steel pipe is coated with lubricating oil within the height range of the bottom steel casing, and is annularly wrapped with felt and fixed. The gap between the steel casing and the felt wrapped around the lattice column steel pipe is filled with cement slurry, and the cement slurry is used to limit the horizontal movement of the lattice column steel pipe.

2. The underwater non-insertion lattice column support and dismantling foundation system according to claim 1, characterized in that: The asphalt felt is fully arranged in an annular direction within the height range of the steel casing at the bottom of the lattice column steel pipe.

3. The underwater non-insertion lattice column supported and easily dismantled foundation system according to claim 2, characterized in that: The lubricating oil is fully distributed between the lattice column steel pipe and the outer covering felt.

4. The underwater non-insertion lattice column supported and easily dismantled foundation system according to claim 3, characterized in that: The outer side of the lattice column steel pipe covered with tarpaulin is circumferentially provided with stainless steel hoops for fixing the tarpaulin, and the stainless steel hoops are vertically arranged every 50 cm.

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