Composite steel for three-shaft mixing pile and waterproof curtain structure

Abstract

The invention discloses composite steel for a three-shaft mixing pile and a waterproof curtain structure, and aims to design most of a composite steel body to be cylindrical, so that soil is not easily disturbed when the composite steel body is inserted, and the composite steel body is pulled out more smoothly. The composite steel for the three-shaft mixing pile comprises a body, the length direction of the body is the first direction, the body is sequentially divided into a first profile section and a second profile section in the first direction, the first profile section is H-shaped steel extending in the first direction, and the second profile section is a cylindrical steel component extending in the first direction; the length of the first profile section is 1 / 5-2 / 5 of the length of the body; and a spiral groove is formed in the outer wall of the second profile section.

Description

Technical Field

[0001] The present invention belongs to the technical field of mixing piles, and more specifically, relates to a composite steel section for tri-axial mixing piles and a water-stop curtain structure. Background Art

[0002] Three-axis mixing piles are a commonly used foundation treatment method that forms a continuous wall or pile by mixing cement and soil, which has both reinforcement and water-stopping functions.

[0003] In order to improve the strength, steel sections are inserted into some three-axis mixing piles. However, the steel sections inserted in existing structures are basically H-shaped steel sections, which can easily cause disturbance of the cement soil when inserting the mixing piles, affecting the continuity of water stopping. Moreover, due to shape restrictions, they are difficult to pull out and may even be prone to breakage. Summary of the Invention

[0004] The main purpose of the present invention is to provide a composite steel section and a water-stop curtain structure for triaxial mixing piles, aiming to design most of the composite steel section body into a cylindrical shape, which is not easy to disturb the soil during insertion and is smoother when pulled out.

[0005] According to a first aspect of the present invention, a composite steel section for a triaxial mixing pile is provided, comprising a body, wherein the length direction of the body is a first direction, and the body is sequentially divided into a first profile section and a second profile section along the first direction, wherein the first profile section is an H-shaped steel extending along the first direction, and the second profile section is a cylindrical steel member extending along the first direction;

[0006] The length of the first profile segment is 1 / 5 to 2 / 5 of the length of the body;

[0007] The outer wall of the second profile segment is provided with a spiral groove.

[0008] In the above-mentioned composite steel section for triaxial mixing piles, the length of the first section is 1 / 3 of the main body.

[0009] In the above-mentioned composite steel for triaxial mixing piles, a rubber strip is provided in the spiral groove.

[0010] In the above-mentioned composite steel section for triaxial mixing piles, the rubber strip swells when exposed to water.

[0011] In the above-mentioned composite steel section for triaxial mixing piles, the second profile section is a round tube steel section.

[0012] In the above-mentioned composite steel for triaxial mixing piles, a circular connecting plate is provided at one end of the second profile segment close to the first profile segment. The connecting plate is coaxially arranged with the second profile segment, and the connecting plate is welded to the first profile segment and the second profile segment respectively.

[0013] In the above-mentioned composite steel for triaxial mixing piles, a plurality of reinforcing ribs are provided between the connecting plate body and the first profile segment, and the reinforcing ribs are respectively welded to the first profile segment and the connecting plate body.

[0014] In the above-mentioned composite steel section for triaxial mixing piles, a circular closed plate is provided at one end of the second section away from the first section.

[0015] According to a second aspect of the present invention, a water-stop curtain structure is provided, comprising a triaxial mixing pile, wherein the composite steel section as described in the first aspect is inserted into the triaxial mixing pile, and the first profile section is higher than the second profile section.

[0016] One of the above technical solutions of the present invention has at least one of the following advantages or beneficial effects:

[0017] In the present invention, H-shaped steel and cylindrical steel members are combined to form a composite steel. When the composite steel is inserted into the triaxial mixing pile, the second profile section enters first. The second profile section occupies most of the length of the main body and is cylindrical, without sharp edges and corners. Even if it contacts the pile wall, it is not easy to cause disturbance of the cement soil. When the first profile section is subsequently inserted, since the second profile section has been completely entered into a determined position, the probability of the first profile section colliding with the pile wall is smaller. Even if it collides with the disturbed cement soil, the amount is relatively small, thereby reducing the impact on the continuity of the water stop.

[0018] When the composite steel is subsequently pulled out, since most of it is cylindrical steel components, the pulling out is easier and the composite steel is not easily broken;

[0019] At the same time, the outer wall of the second profile section is provided with a spiral groove, which can increase the bonding force between the composite steel and the cement soil, so that the anti-permeability performance of the triaxial mixing pile decays slowly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0021] Figure 1 It is a schematic structural diagram of the composite steel for triaxial mixing piles of the present invention;

[0022] Figure 2 The present invention Figure 1 A partial enlarged view of A.

[0023] Among them, the reference numerals of each figure are:

[0024] 1. Main body; 11. First profile segment; 12. Second profile segment; 121. Spiral groove; 2. Connecting plate; 3. Closing plate; 4. Reinforcement rib. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0026] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0027] Reference Figures 1 to 2 As shown, a composite steel section for a triaxial mixing pile includes a body 1, wherein the length direction of the body 1 is a first direction, and the body 1 is divided into a first profile section 11 and a second profile section 12 in sequence along the first direction. The first profile section 11 is an H-shaped steel extending in the first direction, and the second profile section 12 is a cylindrical steel member extending in the first direction.

[0028] The length of the first profile section 11 is 1 / 5 to 2 / 5 of the length of the body 1. The first profile section 11 is relatively short, and the second profile section 12 is longer.

[0029] The outer wall of the second profile section 12 is provided with a spiral groove 121;

[0030] The H-shaped steel and the cylindrical steel member are combined to form a composite steel. When the composite steel is inserted into the triaxial mixing pile, the second profile section 12 enters first. The second profile section 12 occupies most of the length of the main body 1 and is cylindrical, without sharp edges and corners. Even if it contacts the pile wall, it is not easy to cause disturbance of the cement soil. When the first profile section 11 enters later, since the second profile section 12 has completely entered the determined position, the probability of the first profile section 11 colliding with the pile wall is smaller. Even if it collides with the disturbed cement soil, the amount is relatively small, reducing the impact on the continuity of the water stop.

[0031] When the composite steel is subsequently pulled out, since most of it is cylindrical steel components, the pulling out is easier and the composite steel is not easily broken;

[0032] At the same time, the outer wall of the second profile section 12 is provided with a spiral groove 121, which can increase the bonding force between the composite steel and the cement soil, so that the anti-permeability performance of the triaxial mixing pile decays slowly.

[0033] Preferably, the length of the first profile segment 11 is 1 / 3 of the main body 1. Under this ratio, the second profile segment 12 has enough length in the mixing pile to facilitate subsequent extraction.

[0034] In this embodiment, a rubber strip (not shown in the figure) is provided in the spiral groove 121. The rubber strip expands when exposed to water. After the composite steel is inserted into the mixing pile, the rubber strip expands when exposed to water, forming a second water-stop barrier.

[0035] In this embodiment, the second profile segment 12 is a round tube steel. A circular connecting plate 2 is provided at one end of the second profile segment 12 close to the first profile segment 11. The connecting plate 2 is coaxially arranged with the second profile segment 12 and is welded to the first profile segment 11 and the second profile segment 12, respectively. A circular closing plate 3 is provided at one end of the second profile segment 12 away from the first profile segment 11.

[0036] The connecting plate 2 and the closing plate 3 are arranged at both ends of the circular tube steel, thereby closing both ends of the circular tube steel and preventing cement from entering the interior of the circular tube steel;

[0037] The connecting plate body 2 is convenient for welding with the first profile section 11, thereby increasing the contact area, achieving a good welding effect, and being more stable and firm after being fixed.

[0038] In this embodiment, the second profile segment 12 can be formed by sequentially butting two or more circular tube steels, and the circular tube steels can be fixed by welding.

[0039] In some other embodiments, the second profile segment 12 may also be a solid cylindrical steel.

[0040] In this embodiment, a plurality of reinforcing ribs 4 are provided between the connecting plate body 2 and the first profile segment 11 . The reinforcing ribs 4 are welded to the first profile segment 11 and the connecting plate body 2 respectively. The reinforcing ribs 4 are used to improve the connection strength between the first profile segment 11 and the connecting plate body 2 .

[0041] According to a second aspect of the present invention, a water-stop curtain structure is further provided, comprising a triaxial mixing pile, wherein the above-mentioned composite steel is inserted into the triaxial mixing pile, and the first profile section 11 is higher than the second profile section 12 .

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A composite steel for a triaxial mixing pile, comprising a body, wherein the length direction of the body is a first direction, and wherein: The body is divided into a first profile section and a second profile section in sequence along the first direction, the first profile section is an H-shaped steel extending along the first direction, and the second profile section is a cylindrical steel member extending along the first direction; The length of the first profile segment is 1 / 5 to 2 / 5 of the length of the body; The outer wall of the second profile segment is provided with a spiral groove.

2. The composite steel for triaxial mixing piles according to claim 1, characterized in that: The length of the first profile segment is 1 / 3 of the body.

3. The composite steel for triaxial mixing piles according to claim 1, characterized in that: A rubber strip is provided in the spiral groove.

4. The composite steel for triaxial mixing piles according to claim 3, characterized in that: The rubber strip swells when exposed to water.

5. The composite steel for triaxial mixing piles according to claim 1, characterized in that: The second profile section is a round tube steel.

6. The composite steel for triaxial mixing piles according to claim 5, characterized in that: A circular connecting plate is provided at one end of the second profile segment close to the first profile segment. The connecting plate is coaxially arranged with the second profile segment and is welded to the first profile segment and the second profile segment respectively.

7. The composite steel for triaxial mixing piles according to claim 6, characterized in that: A plurality of reinforcing ribs are provided between the connecting plate body and the first profile segment, and the reinforcing ribs are respectively welded to the first profile segment and the connecting plate body.

8. The composite steel for triaxial mixing piles according to claim 6, characterized in that: A circular closing plate is provided at one end of the second profile segment away from the first profile segment.

9. A water-stop curtain structure comprising a triaxial mixing pile, characterized in that: The composite steel section according to any one of claims 1 to 8 is inserted into the triaxial mixing pile, and the first profile section is higher than the second profile section.

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