Composite foundation pit supporting structure

Abstract

The utility model discloses a composite type foundation pit supporting structure, which relates to the field of supporting structures, and adopts the technical scheme that the composite type foundation pit supporting structure comprises stirring piles and shear walls which are distributed inside and outside; i-shaped steel is inserted into the mixing piles and the shear wall at the same time, and wing plates on the two sides of the I-shaped steel are located on the mixing piles and the shear wall respectively. By means of the scheme, the construction period can be greatly shortened, economic benefits are improved to a certain degree, the supporting scheme is optimized, and the supporting structure is more stable.

Description

Technical Field

[0001] The utility model relates to the field of supporting structures, in particular to a composite foundation pit supporting structure. Background Art

[0002] Steel-cement composite mixing pile is a foundation treatment technology, commonly used in soft soil areas or projects that need to enhance the bearing capacity of the foundation. It combines the advantages of steel piles and concrete to improve the bearing capacity and anti-lateral displacement of the pile body, and mixes cement and soil into the pile body through a mixer to form a solid composite foundation structure. However, in the case of high-strength support or soft geological conditions, the bearing capacity of steel-cement composite mixing piles is not enough to meet the engineering needs, and its support strength is insufficient. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a composite foundation pit support structure, which can greatly save construction time, improve economic benefits to a certain extent, optimize the support scheme, and make the support structure more stable, especially in soft geological conditions such as soft soil areas and high groundwater levels that require high-strength support. It can provide a more stable and firm support effect.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a composite foundation pit support structure, including mixing piles and shear walls distributed inside and outside;

[0005] The I-beam is inserted into the mixing pile and the shear wall at the same time, and the wing plates on both sides of the I-beam are respectively located at the mixing pile and the shear wall.

[0006] Before construction, the construction site is leveled and measured and laid out. An excavator is used to dig trenches, and then a cement mixer is used to drill holes and inject grouting. After repeated work, a crawler crane is used to drive the I-beam into the three-axis cement mixing pile. After all the steel sections are inserted, the foundation pit is excavated. The formwork is installed in layers from top to bottom at the foundation pit, the steel grid or steel skeleton is installed, the concrete is poured, and after the concrete solidifies, the formwork is removed. Construction can be stopped when the structural integrity requirements are met.

[0007] Preferably, the mixing pile is a three-axis cement mixing pile, which can improve efficiency.

[0008] Preferably, the side walls of adjacent mixing piles are intersected and overlapped, thereby improving the connection between the mixing piles.

[0009] Preferably, the wing plate surface of the I-beam is provided with a plurality of protrusions or grooves, so as to increase the friction between the wing plate and the concrete, so that they can be firmly connected to each other.

[0010] Preferably, the wing plate of the I-beam is punched to form a protrusion and a groove, which has a simpler structure and can form a protrusion and a groove at the same time by punching.

[0011] Preferably, the protrusions or grooves are distributed on the wing plate of the I-beam on one side of the shear wall. Because the shear wall is constructed later, when the side is cast, the concrete can better cooperate with the protrusions and grooves.

[0012] Preferably, the wing plate of the I-beam is provided with a plurality of through holes, which can better cooperate with the concrete on the one hand, and facilitate connection with the concrete structure on the other hand.

[0013] Preferably, part or all of the through holes are connected to the reinforcement skeleton of the mixing pile and / or the shear wall through a connecting piece. The connection with the reinforcement skeleton can improve the integrity of the I-beam and the concrete.

[0014] Beneficial effects of the utility model:

[0015] This solution can greatly save construction time, improve economic benefits to a certain extent, optimize the support plan, and make the support structure more stable. Especially in soft geological conditions such as soft soil areas and high groundwater levels that require high-strength support, it can provide more stable and firm support. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only five of the drawings of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of Embodiment 1 of the present utility model;

[0018] Figure 2 The I-beam and the steel bar skeleton of Example 2 of the utility model are connected;

[0019] Figure 3 This is a schematic diagram of an I-beam according to Example 2 of the utility model;

[0020] Figure 4 It is a cross-sectional schematic diagram of Embodiment 2 of the present utility model;

[0021] Figure 5 It is a side schematic diagram of Embodiment 2 of the present utility model;

[0022] Among them, 1. shear wall; 2. I-beam; 3. mixing pile; 4. steel bar skeleton; 5. connecting parts; 6. through hole; 7. protrusion; 8. groove. DETAILED DESCRIPTION

[0023] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0024] Example 1

[0025] like Figure 1 As shown, a composite foundation pit support structure includes mixing piles 3 and shear walls 1 distributed inside and outside; I-beams 2 are inserted into the mixing piles 3 and the shear walls 1 at the same time, and the wing plates on both sides of the I-beams 2 are respectively located at the mixing piles 3 and the shear walls 1.

[0026] Before construction, the construction site is leveled and measured and laid out. An excavator is used to dig trenches, and then a cement mixer is used to drill holes and inject grouting. After repeated work, a crawler crane is used to drive the I-beam 2 into the three-axis cement mixing pile 3. After all the steel sections are inserted, the foundation pit is excavated. The formwork is installed in layers from top to bottom at the foundation pit, the steel grid or steel skeleton 4 is installed, the concrete is poured, and after the concrete solidifies, the formwork is removed. Construction can be stopped when the structural integrity requirements are met.

[0027] The mixing pile 3 is a three-axis cement mixing pile 3. The efficiency can be improved.

[0028] The side walls of adjacent mixing piles 3 are intersected and overlapped, thereby improving the connection between the mixing piles 3.

[0029] Example 2

[0030] Combination Figure 2 and Figure 3 As shown, compared with embodiment 1, embodiment 2 also includes the following technical features: the wing plate of the I-beam 2 is distributed with a plurality of through holes 6. On the one hand, the through holes 6 can better cooperate with the concrete, and on the other hand, it is convenient to form a connection with the concrete structure.

[0031] Part or all of the through holes 6 are connected to the mixing pile 3 and / or the steel skeleton 4 of the shear wall 1 through the connecting piece 5. The connection with the steel skeleton 4 can improve the integrity of the I-beam 2 and the concrete.

[0032] Example 3

[0033] Combination Figure 4 and Figure 5 As shown, compared with embodiment 1, embodiment 3 also includes the following technical features: a plurality of protrusions 7 and grooves 8 are distributed on the surface of the wing plate of the I-beam 2, so as to increase the friction between the wing plate and the concrete, so that they can be firmly connected to each other.

[0034] The flange of the I-beam 2 is punched to form a protrusion 7 and a groove 8. The structure is simpler, and the protrusion 7 and the groove 8 can be formed simultaneously under punching.

[0035] The protrusions 7 or grooves 8 are distributed on the wing plates of the I-beams 2 on one side of the shear wall 1. Because the shear wall 1 is a subsequent construction, when the side is cast, the concrete can better cooperate with the protrusions 7 and grooves 8.

[0036] Beneficial effects of the utility model:

[0037] This solution can greatly save construction time, improve economic benefits to a certain extent, optimize the support plan, and make the support structure more stable. Especially in soft geological conditions such as soft soil areas and high groundwater levels that require high-strength support, it can provide more stable and firm support.

[0038] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A composite foundation pit support structure, characterized in that: It includes mixing piles (3) and shear walls (1) distributed inside and outside; The I-beam (2) is inserted into the mixing pile (3) and the shear wall (1) at the same time, and the wing plates on both sides of the I-beam (2) are respectively located on the mixing pile (3) and the shear wall (1).

2. A composite foundation pit support structure according to claim 1, characterized in that: The mixing pile (3) is a three-axis cement mixing pile (3).

3. A composite foundation pit support structure according to claim 1, characterized in that: The side walls of adjacent mixing piles (3) are intersecting and overlapping.

4. A composite foundation pit support structure according to claim 1, characterized in that: A plurality of protrusions (7) or grooves (8) are distributed on the wing plate surface of the I-beam (2).

5. The composite foundation pit support structure according to claim 1, characterized in that: The wing plate of the I-beam (2) is punched to form a protrusion (7) and a groove (8).

6. A composite foundation pit support structure according to claim 5, characterized in that: The protrusions (7) or grooves (8) are distributed on the wing plates of the I-beams (2) on one side of the shear wall (1).

7. A composite foundation pit support structure according to claim 1, characterized in that: The wing plate of the I-beam (2) is provided with a plurality of through holes (6).

8. A composite foundation pit supporting structure according to claim 7, characterized in that: Part or all of the through holes (6) are connected to the steel frame (4) of the mixing pile (3) and / or the shear wall (1) through a connecting piece (5).

Images