Supporting structure for standing truck crane on foundation pit

Abstract

The utility model relates to the technical field of foundation pit construction, in particular to a supporting structure for standing a truck crane on a foundation pit. Comprising a first stand column vertically arranged in a foundation pit; the secant piles are vertically arranged in the foundation pit and located on one side of the first stand column, and the side faces, away from the first stand column, of the secant piles are undisturbed soil; the foundation pit structural beams are arranged on the top surfaces of the first stand columns and the secant piles; the supporting beam is arranged on the top face of the foundation pit structural beam and the top face of the undisturbed soil, and a truck crane is arranged on the supporting beam. The first stand columns and the secant piles play a role in supporting the supporting beams, the supporting beams are arranged on the top faces of the foundation pit structural beam and the undisturbed soil, when the truck crane is arranged on the supporting beams, the supporting beams disperse the pressure, acting on the undisturbed soil, of the supporting legs to the whole supporting beams, and then the side pressure of the secant piles is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit construction, in particular to a supporting structure for a standing automobile crane on a foundation pit. Background Art

[0002] In some deep-sea port construction projects, a mobile crane is required to install a tower crane. When placing the mobile crane, a foundation pit cover plate is typically laid above the foundation pit. Two of the crane's legs are placed on the cover plate, while the other two legs are placed on the undisturbed soil. However, with this method, the two legs resting on the undisturbed soil exert significant lateral pressure on the occlusive piles on the undisturbed soil side, causing pit safety concerns. Utility Model Content

[0003] Therefore, the utility model aims to overcome the technical problems that need to be solved in the prior art, thereby providing a support structure for a truck crane standing on a foundation pit.

[0004] The utility model provides a support structure for a truck crane standing on a foundation pit, comprising:

[0005] A first column is vertically arranged in the foundation pit;

[0006] An interlocking pile is vertically arranged in the foundation pit and located on one side of the first column, and the side of the interlocking pile away from the first column is original soil;

[0007] The foundation pit structural beam is arranged on the top surface of the first column and the occlusal pile;

[0008] A support beam is arranged on the top surface of the foundation pit structural beam and the original soil, and the truck crane is arranged on the support beam.

[0009] Furthermore, there are multiple first columns and multiple interlocking piles, and the foundation pit structural beam connects adjacent first columns and interlocking piles.

[0010] Furthermore, it also includes:

[0011] There are multiple second columns, which are set in the foundation pit and located on a side of the first column away from the interlocking pile. The foundation pit structural beam connects adjacent first columns and second columns.

[0012] Furthermore, the first column and the second column are both steel lattice columns, and the cross-sectional size of the steel lattice column is 600*600.

[0013] Furthermore, the foundation pit structural beam is a reinforced concrete structure.

[0014] Furthermore, the support beam includes a plurality of steel beams, and the steel beams are fully welded with channel steel cross beams.

[0015] Furthermore, the cross-section of the steel beam is H300*200*8*18, and the material is Q235B.

[0016] Furthermore, the support beam is arranged between the first column and the original soil.

[0017] Furthermore, the truck crane includes a body and four legs, the number of the support beams is two, and the four legs are arranged on the support beams in pairs, wherein two legs are located above the first column, and the other two columns are located above the original soil.

[0018] Furthermore, a metal pad is provided between the support beam and the support legs.

[0019] The technical solution of this utility model has the following advantages:

[0020] The utility model provides a support structure for a mobile crane standing on a foundation pit, wherein a first column and an interlocking pile support a support beam, and the support beam is arranged on the top surface of the foundation pit structure beam and the original soil. When the mobile crane is arranged on the support beam, the support beam disperses the pressure of the support legs on the original soil to the entire support beam, thereby reducing the lateral pressure of the interlocking pile.

[0021] The utility model provides a supporting structure for a truck crane standing on a foundation pit, wherein the foundation pit structural beam can enhance the supporting effect of the first column and the bite pile on the supporting beam.

[0022] The utility model provides a supporting structure for a truck crane standing on a foundation pit, wherein the second column can enhance the supporting effect of the first column and the bite pile on the supporting beam.

[0023] The utility model provides a support structure for a truck crane standing on a foundation pit, wherein four legs are arranged in pairs on the support beam, wherein two legs are located above a first column and the other two columns are located above the original soil, which can prevent the force of the legs from being concentrated on the first column, the interlocking piles or the original soil, making the foundation pit structure safer and the lateral pressure of the interlocking piles smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the structure of the utility model.

[0026] Description of reference numerals;

[0027] 1. First column; 2. Foundation pit; 3. Interlocking pile; 4. Original soil; 5. Foundation pit structural beam; 6. Support beam; 7. Second column. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Example

[0033] During the construction of a certain offshore deep-sea port, when placing a truck crane, it was necessary to stand on the foundation pit cover plate, and the allowable load value of the cover plate was 4t / m2; however, the maximum reaction force of the truck crane's outriggers was 93.12t. Even if a 3*3m roadbed box was used to evenly distribute the outrigger reaction force load, it still reached 10.35t / m2, which was twice the allowable load value of the foundation pit. In addition, the load distribution of the roadbed box could not be completely evenly distributed. Based on this situation, the local load value of the truck crane's outriggers on the foundation pit cover plate would far exceed the allowable load value of the foundation pit. If the truck crane was not used to stand on the cover plate, the tower crane would not be able to be installed, seriously affecting the progress of on-site construction.

[0034] like Figure 1 A specific embodiment of a support structure for a mobile crane standing on a foundation pit is shown, and the support structure for a mobile crane standing on a foundation pit includes:

[0035] The first column 1 is vertically arranged in the foundation pit 2;

[0036] An engaging pile 3 is vertically arranged in the foundation pit 2 and located on one side of the first column 1, and the side of the engaging pile 3 away from the first column 1 is undisturbed soil 4;

[0037] The foundation pit structural beam 5 is arranged on the top surface of the first column 1 and the occlusal pile 3;

[0038] The support beam 6 is arranged on the top surface of the foundation pit structure beam 5 and the original soil 4, and the truck crane is arranged on the support beam 6.

[0039] The first column 1 and the interlocking pile 3 support the support beam 6. The support beam 6 is set on the top surface of the foundation pit structure beam 5 and the original soil 4. When the truck crane is set on the support beam 6, the support beam 6 disperses the pressure of the support legs on the original soil 4 to the entire support beam 6, thereby reducing the lateral pressure of the interlocking pile 3.

[0040] Furthermore, there are multiple first columns 1 and multiple interlocking piles 3, and the foundation pit structural beam 5 connects adjacent first columns 1 and interlocking piles 3. The foundation pit structural beam 5 connecting adjacent first columns 1 and interlocking piles 3 means that the foundation pit structural beam 5 is arranged between two adjacent first columns 1, between two adjacent interlocking piles 3, and between two adjacent first columns 1 and interlocking piles 3. It should be noted that the foundation pit structural beam 5 may not be arranged between two obliquely adjacent first columns 1 and interlocking piles 3. The foundation pit structural beam 5 can enhance the supporting effect of the first columns 1 and interlocking piles 3 on the support beam 6.

[0041] Furthermore, it also includes:

[0042] A plurality of second columns 7 are provided in the foundation pit 2 and are located on the side of the first columns 1 away from the snap piles 3. The foundation pit structural beam 5 connects adjacent first columns 1 and second columns 7. The second columns 7 can enhance the support provided by the first columns 1 and snap piles 3 to the support beam 6.

[0043] This application can use a 300T truck crane to install the Zoomlion LH630-50X boom tower crane, with an installation radius of 32 meters, the heaviest component of the tower crane is 20.8T, the truck crane weighs 72T, the horizontal span of the outriggers is 8.5 meters, the longitudinal span is 8.9 meters, and the counterweight is 140T. After calculation, the total weight of the 300T truck crane when working is 232.8T. According to the verification formula, the pressure of a single outrigger is N = 93.12T.

[0044] Furthermore, both the first and second columns 1 and 7 are steel lattice columns with a cross-sectional dimension of 600mm*600mm. They are constructed using 4L200*20 angle steel and welded on all four sides with 550*200*16@600 steel bars. The single pile bearing capacity of the first and second columns 1 and 7 is 3600 kN, or approximately 360 tons.

[0045] Furthermore, the foundation pit structure beam 5 is a reinforced concrete structure.

[0046] Furthermore, the support beam 6 includes a plurality of steel beams, and the steel beams are fully welded with channel steel cross beams.

[0047] Furthermore, the cross-section of the steel beam is H300*200*8*18, and the material is Q235B.

[0048] Furthermore, the support beam 6 is arranged between the first column 1 and the original soil 4. It is placed horizontally under the support legs to disperse and transmit the uniformly distributed load. Channel steel beams are fully welded between the steel beams to ensure that the overall force of the steel beam under the support legs is not misaligned.

[0049] Furthermore, the mobile crane includes a body and four legs, and the number of the support beams 6 is two. The four legs are arranged on the support beams 6 in pairs, wherein two legs are located above the first column 1, and the other two legs are located above the original soil 4. This prevents the force of the legs from being concentrated on the first column 1, the occlusive piles 3, or the original soil 4, making the foundation pit 2 structure safer and reducing the lateral pressure on the occlusive piles 3.

[0050] The support beam 6 disperses the reaction force of the support leg linearly along the first column 1 and the interlocking pile 3. Compared with the support leg directly acting on the first column 1 and the interlocking pile 3, the present application converts the point load on the foundation pit structure beam 5 into a line load, reducing the structural stress on the foundation pit 2 and ensuring the safety of the foundation pit 2.

[0051] Furthermore, a metal pad is provided between the support beam 6 and the legs, so that the force exerted by the legs on the support beam 6 can be more dispersed.

[0052] Beneficial effects:

[0053] 1. Use the support beam 6 to transform the load form and reduce the force acting on the foundation pit structure beam 5.

[0054] 2. Use the support beam 6 to transform the load form so that the interlocking pile 3 participates in the load bearing, reduces the pressure on the external outriggers of the foundation pit 2, reduces the lateral force affecting the interlocking pile 3 due to the pressure on the external outriggers, and reduces the impact on the safety of the foundation pit 2.

[0055] 3. The support beams 6 are arranged as a whole. Even if the safety calculation of the local foundation pit structure beams 5 does not meet the requirements, the support beams 6 can be transformed to reduce the local stress on the foundation pit structure beams 5 and meet the safety needs.

[0056] 4. The overall arrangement of the support beam 6 allows the first column 1 and the second column 7 to bear more of the force, and the first column 1 and the second column 7 bear more of the support leg reaction force, reducing the impact of the reaction force on the foundation pit structure beam 5, thereby ensuring the safety of the foundation pit 2 during the installation process.

[0057] 5. Adding support beam 6 can disperse the reaction force of the outriggers. By changing the force form, the construction of the standing truck crane on the foundation pit structure beam 5 is safer and can adapt to the working conditions of different foundation pit support designs.

[0058] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A support structure for a truck crane standing on a foundation pit, characterized in that: include: A first column (1) is vertically arranged in the foundation pit (2); An interlocking pile (3) is vertically arranged in the foundation pit (2) and located on one side of the first column (1), and the side of the interlocking pile (3) away from the first column (1) is original soil (4); A foundation pit structural beam (5) is provided on the top surface of the first column (1) and the occlusal pile (3); A support beam (6) is arranged on the top surface of the foundation pit structural beam (5) and the original soil (4), and the truck crane is arranged on the support beam (6).

2. The supporting structure for a truck crane standing on a foundation pit according to claim 1, characterized in that: There are multiple first columns (1) and multiple interlocking piles (3), and the foundation pit structural beam (5) connects adjacent first columns (1) and interlocking piles (3).

3. The supporting structure for a truck crane standing on a foundation pit according to claim 1, characterized in that: Also includes: A plurality of second columns (7) are arranged in the foundation pit (2) and are located on a side of the first column (1) away from the engaging pile (3); the foundation pit structural beam (5) connects adjacent first columns (1) and second columns (7).

4. The supporting structure for a truck crane standing on a foundation pit according to claim 3, characterized in that: The first column (1) and the second column (7) are both steel lattice columns, and the cross-sectional size of the steel lattice columns is 600*600.

5. The supporting structure for a truck crane standing on a foundation pit according to claim 1, characterized in that: The foundation pit structural beam (5) is a reinforced concrete structure.

6. The supporting structure for a truck crane standing on a foundation pit according to claim 1, characterized in that: The support beam (6) comprises a plurality of steel beams, and the steel beams are fully welded with channel steel cross beams.

7. The supporting structure for a truck crane standing on a foundation pit according to claim 6, characterized in that: The cross-section of the steel beam is H300*200*8*18, and the material is Q235B.

8. The supporting structure for a truck crane standing on a foundation pit according to claim 1, characterized in that: The support beam (6) is arranged between the first column (1) and the original soil (4).

9. The supporting structure for a truck crane standing on a foundation pit according to claim 1, characterized in that: The truck crane comprises a vehicle body and four legs, the number of the support beams (6) is two, and the four legs are arranged on the support beams (6) in pairs, wherein two legs are located above the first column (1) and the other two columns are located above the original soil (4).

10. The supporting structure for a truck crane standing on a foundation pit according to claim 9, characterized in that: A metal pad is provided between the support beam (6) and the support legs.

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