Plug pin type expansion device for prefabricated diaphragm wall
By using expansion wedges and guide screws in the pin-type expansion device of prefabricated underground continuous walls, the loosening and water leakage caused by the gap between the occlusion structures between prefabricated walls is solved, and higher stability and water stopping effect are achieved.
Patent Information
- Application Number
- CN202421650948.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-12
AI Technical Summary
There is a large gap between the occlusion structures between prefabricated walls, which leads to loosening between prefabricated walls, affecting the water-stop effect of prefabricated underground continuous walls and leading to water leakage problems.
Using a pin-type expansion device, by inserting an expansion wedge and a guide screw between the prefabricated walls, the expansion wedge sliding along the guide screw is abutted between the expansion elements and is stretched open, thereby supporting the adjacent prefabricated walls in a horizontal direction until the occlusion structures are tightened to each other.
It effectively avoids loosening between prefabricated walls, improves the stability and water-stop effect of prefabricated underground continuous walls, and prevents water leakage problems.
Smart Images
Figure CN222847326U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of prefabricated underground continuous walls, in particular to a latch-type expansion device for prefabricated underground continuous walls. Background Art
[0002] Underground continuous walls are widely used in foundation pit retaining projects due to their advantages such as high overall rigidity and good water-stopping effect. Underground continuous walls are divided into cast-in-place underground continuous walls and prefabricated underground continuous walls. Among them, prefabricated underground continuous walls have the advantages of high strength, factory production, high construction efficiency, saving construction sites and green environmental protection, and are widely used.
[0003] A prefabricated underground continuous wall generally includes several prefabricated walls distributed side by side. Any two adjacent prefabricated walls are interlocked and connected with each other to form an underground continuous wall. However, due to the low manufacturing precision of the prefabricated walls, there will be large gaps in the interlocking structure between the prefabricated walls, which makes it easy for the prefabricated walls to loosen, affecting the water-stopping effect of the prefabricated underground continuous wall and causing leakage problems. Utility Model Content
[0004] The purpose of the utility model is to provide a pin-type expansion device for prefabricated ground-connected walls that can effectively solve the problem that there are large gaps in the interlocking structure between the current prefabricated walls, which makes the prefabricated walls easy to loosen, thus affecting the water-stopping effect of the prefabricated underground continuous wall and causing water leakage.
[0005] The technical solution of the utility model is:
[0006] A bolt-type expansion device for a prefabricated ground-connected wall, comprising:
[0007] Two cross-distributed expansion elements are hingedly connected via a rotating shaft;
[0008] A guide screw is located between the two expansion elements, one end of the guide screw is connected to the rotating shaft and extends radially along the rotating shaft, and a locking nut is provided on the guide screw;
[0009] The expansion wedge that slides along the guide screw is located between the two expansion elements, and the expansion wedge and the rotating shaft are located on the same side of the locking nut. The specific use of a pin-type expansion device for a prefabricated underground continuous wall of the present scheme is as follows: after the prefabricated wall is inserted into the cement soil and before the cement soil solidifies, the pin-type expansion device is inserted between two adjacent prefabricated walls; then, the locking nut is tightened to move the expansion wedge downward along the guide screw, and the expansion wedge is pressed between the two expansion elements to spread the two expansion elements apart, thereby spreading the two adjacent prefabricated walls apart in the horizontal direction until the interlocking structure between the two adjacent prefabricated walls is tightened against each other. In the prefabricated underground continuous wall, any two adjacent prefabricated walls are spread apart by the pin-type expansion device, so that the interlocking structure between the two adjacent prefabricated walls is tightened against each other. In this way, the prefabricated walls in the prefabricated underground continuous wall are tightened against each other, thereby effectively avoiding looseness between the prefabricated walls and improving the stability and water-stopping effect of the prefabricated underground continuous wall; thereby effectively solving the problem of large gaps in the interlocking structure between the current prefabricated walls, which makes it easy for the prefabricated walls to loosen, affecting the water-stopping effect of the prefabricated underground continuous wall and causing water leakage.
[0010] Preferably, when the expansion wedge moves along the guide screw toward the rotating shaft, the expansion wedge abuts between the two expansion elements to spread the two expansion elements apart.
[0011] Preferably, the two opposite sides of the expansion wedge block facing the two expansion elements are inclined wedge surfaces, and the two inclined wedge surfaces are distributed in a V shape. In this way, when the expansion wedge block moves along the guide screw toward the rotating shaft, the expansion wedge block abuts against the two expansion elements through the inclined wedge surfaces, which is conducive to expanding the two expansion elements.
[0012] Preferably, the two cross-distributed expansion elements are distributed in an X shape. In this way, when the expansion wedge moves along the guide screw toward the rotating shaft, the upper and lower ends of the two expansion elements are both spread apart, and the expansion elements can be pressed against the prefabricated wall through the upper and lower ends to spread apart the two adjacent prefabricated walls in the horizontal direction, which is beneficial to spread apart the two adjacent prefabricated walls and improve the stability of the prefabricated wall after being spread apart.
[0013] Preferably, the expansion element is formed by a long steel frame, which includes two parallel main steel plates and a connecting steel plate connecting the two main steel plates into one, so that the stability of the expansion element can be ensured, and the adjacent prefabricated walls can be reliably propped apart.
[0014] Preferably, the main steel plate is perpendicular to the shaft, and an axial hole is provided on the main steel plate, and the shaft passes through each main steel plate of the two expansion elements in sequence. In this way, the manufacture of the plug-type expansion device is convenient and the strength of the hinged structure of the two hinged expansion elements is improved.
[0015] Preferably, the expansion element is provided with the connecting steel plate on one side facing the expansion wedge block, so that when the expansion wedge block moves along the guide screw toward the rotating shaft, the expansion wedge block will abut against the connecting steel plate to spread the two expansion elements apart.
[0016] Preferably, one end of the lead screw is connected to the rotating shaft by welding, so as to facilitate the connection and manufacture of the lead screw and the rotating shaft and ensure the connection strength of the lead screw and the rotating shaft.
[0017] Preferably, a screw positioning hole is provided on the rotating shaft, and one end of the lead screw is inserted into the screw positioning hole. In this way, the lead screw can be accurately installed at the specified position of the rotating shaft, and the installation orientation of the lead screw is guaranteed to be accurate.
[0018] Preferably, a gasket is provided on the guide screw, and the gasket is located between the locking nut and the expansion wedge, and there are two locking nuts. Of the two locking nuts, one locking nut close to the expansion wedge is used to push the expansion wedge to move and spread the two expansion elements apart; the other locking nut is tightened after the interlocking structure between the two adjacent prefabricated walls is tightened to serve as an anti-loosening device for the locking nut close to the expansion wedge to prevent the locking nut from loosening.
[0019] The beneficial effects of the utility model are: it can effectively solve the problem of large gaps in the interlocking structure between the current prefabricated walls, which makes the prefabricated walls easy to loosen, affecting the water-stopping effect of the prefabricated underground continuous wall and causing water leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 The utility model is a three-dimensional structural schematic diagram of a bolt-type expansion device for a prefabricated ground-connected wall.
[0021] Figure 2 The utility model is a partial structural schematic diagram of a bolt-type expansion device for a prefabricated ground-connected wall in actual application.
[0022] In the figure:
[0023] Expansion element 1, main steel plate 1.1, connecting steel plate 1.2;
[0024] Axis 2;
[0025] Lead screw 3;
[0026] Expansion wedge 4, inclined wedge surface 4.1;
[0027] Locking nut 5;
[0028] Prefabricated walls6. DETAILED DESCRIPTION
[0029] Specific embodiment 1, as Figure 1 , Figure 2 As shown, a bolt-type expansion device for a prefabricated ground-connected wall comprises two expansion elements 1, a guide screw 3 and an expansion wedge 4.
[0030] The two expansion elements 1 are cross-distributed and are hingedly connected via a rotating shaft 2 .
[0031] The guide screw 3 is located between the two expansion elements 1. One end of the guide screw 3 is connected to the rotating shaft 2 and extends in the radial direction of the rotating shaft 2. A locking nut 5 is provided on the guide screw 3.
[0032] The expansion wedge 4 slides along the guide screw 3. Specifically, the expansion wedge 4 is provided with a guide through hole penetrating the upper and lower surfaces of the expansion wedge 4. The guide screw 3 passes through the guide through hole so that the expansion wedge 4 slides along the guide screw 3. The expansion wedge 4 is located between the two expansion elements 1. The expansion wedge 4 and the rotating shaft 2 are located on the same side of the locking nut 5. When the expansion wedge 4 moves along the guide screw 3 toward the rotating shaft 2, the expansion wedge 4 abuts between the two expansion elements 1 to open the two expansion elements 1.
[0033] The latch-type expansion device for a prefabricated ground-connected wall of the present embodiment is suitable for use in a prefabricated underground continuous wall in which there is a cavity or gap between two adjacent prefabricated walls 6 for the insertion of the latch-type expansion device. For example, the cross section of the prefabricated wall 6 is I-shaped. After the two prefabricated walls 6 are inserted into the cement soil and interlocked with each other, a cavity for the insertion of the latch-type expansion device is formed between the two adjacent prefabricated walls 6. Of course, the latch-type expansion device for a prefabricated ground-connected wall of the present embodiment is not limited to use on prefabricated walls 6 with an I-shaped cross section. As long as there is a cavity or gap between two adjacent prefabricated walls 6 for the insertion of the latch-type expansion device, the latch-type expansion device for a prefabricated ground-connected wall of the present embodiment can be used.
[0034] The specific use of the bolt-type expansion device for prefabricated ground-connected walls of this embodiment is as follows:
[0035] After the prefabricated wall 6 is inserted into the cement soil, before the cement soil solidifies, the bolt-type expansion device is inserted between two adjacent prefabricated walls 6. At this time, the guide screw 3 and the locking nut 5 are located above the shaft, and the guide screw 3 is vertically distributed; then, the locking nut 5 is tightened, and the expansion wedge 4 is moved downward along the guide screw 3. The expansion wedge 4 is pressed between the two expansion elements 1 to open the two expansion elements 1, thereby opening the two adjacent prefabricated walls 6 in the horizontal direction until the interlocking structure between the two adjacent prefabricated walls 6 is tightened to each other. In the prefabricated underground continuous wall, any two adjacent prefabricated walls 6 are opened by the bolt-type expansion device, so that the interlocking structure between the two adjacent prefabricated walls 6 is tightened to each other. In this way, the prefabricated walls 6 in the prefabricated underground continuous wall are tightened against each other, thereby effectively preventing the prefabricated walls 6 from loosening and improving the stability and water-stopping effect of the prefabricated underground continuous wall; thus, it can effectively solve the problem that there are large gaps in the interlocking structure between the current prefabricated walls 6, which makes it easy for the prefabricated walls 6 to loosen, affecting the water-stopping effect of the prefabricated underground continuous wall and causing water leakage.
[0036] Specific embodiment 2, as Figure 1 , Figure 2 As shown, a bolt-type expansion device for a prefabricated ground-connected wall comprises two expansion elements 1, a guide screw 3 and an expansion wedge 4.
[0037] The two expansion elements 1 are cross-distributed. The expansion elements 1 are made of metal material. The two expansion elements 1 are hingedly connected via a rotating shaft 2. In this embodiment, the two cross-distributed expansion elements 1 are distributed in an X shape.
[0038] The guide screw 3 is located between the two expansion elements 1. One end of the guide screw 3 is connected to the rotating shaft 2 and extends in the radial direction of the rotating shaft 2. A locking nut 5 is provided on the guide screw 3.
[0039] The expansion wedge 4 slides along the guide screw 3. Specifically, the expansion wedge 4 is provided with a guide through hole penetrating the upper and lower surfaces of the expansion wedge 4. The guide screw 3 passes through the guide through hole so that the expansion wedge 4 slides along the guide screw 3. The expansion wedge 4 is located between the two expansion elements 1. The expansion wedge 4 and the rotating shaft 2 are located on the same side of the locking nut 5. When the expansion wedge 4 moves along the guide screw 3 toward the rotating shaft 2, the expansion wedge 4 abuts between the two expansion elements 1 to open the two expansion elements 1.
[0040] The latch-type expansion device for a prefabricated ground-connected wall of the present embodiment is suitable for use in a prefabricated underground continuous wall in which there is a cavity or gap between two adjacent prefabricated walls 6 for the insertion of the latch-type expansion device. For example, the cross section of the prefabricated wall 6 is I-shaped. After the two prefabricated walls 6 are inserted into the cement soil and interlocked with each other, a cavity for the insertion of the latch-type expansion device is formed between the two adjacent prefabricated walls 6. Of course, the latch-type expansion device for a prefabricated ground-connected wall of the present embodiment is not limited to use on prefabricated walls 6 with an I-shaped cross section. As long as there is a cavity or gap between two adjacent prefabricated walls 6 for the insertion of the latch-type expansion device, the latch-type expansion device for a prefabricated ground-connected wall of the present embodiment can be used.
[0041] The specific use of the bolt-type expansion device for prefabricated ground-connected walls of this embodiment is as follows:
[0042] After the prefabricated wall 6 is inserted into the cement soil, before the cement soil solidifies, the plug-type expansion device is inserted between two adjacent prefabricated walls 6. At this time, the guide screw 3 and the locking nut 5 are located above the shaft, and the guide screw 3 is distributed vertically;
[0043] Next, tighten the locking nut 5, move the expansion wedge 4 downward along the guide screw 3, and the expansion wedge 4 abuts between the two expansion elements 1 to spread the two expansion elements 1 apart, thereby spreading the two adjacent prefabricated walls 6 apart in the horizontal direction until the interlocking structures between the two adjacent prefabricated walls 6 are mutually tightened. In this embodiment, since the two cross-distributed expansion elements 1 are distributed in an X shape, in the process of the expansion wedge 4 moving along the guide screw 3 toward the rotating shaft 2, the upper and lower ends of the two expansion elements 1 are spread apart, and the expansion element 1 can abut on the prefabricated wall 6 through the upper and lower ends to spread the two adjacent prefabricated walls 6 apart in the horizontal direction, which is conducive to spreading the two adjacent prefabricated walls 6 apart and improving the stability of the prefabricated walls 6 after being spread apart.
[0044] In the prefabricated underground continuous wall, any two adjacent prefabricated walls 6 are stretched apart by the bolt-type expansion device, so that the interlocking structures between the two adjacent prefabricated walls 6 are mutually tightened. In this way, the prefabricated walls 6 in the prefabricated underground continuous wall are mutually tightened, thereby effectively preventing the prefabricated walls 6 from loosening, improving the stability and water-stopping effect of the prefabricated underground continuous wall; thus, it can effectively solve the problem that there are large gaps in the interlocking structures between the prefabricated walls 6, which makes the prefabricated walls 6 easy to loosen, affecting the water-stopping effect of the prefabricated underground continuous wall, and causing water leakage.
[0045] Further, such as Figure 1As shown, the two opposite sides of the expansion wedge block 4 facing the two expansion elements 1 are inclined wedge surfaces 4.1. In this embodiment, the two inclined wedge surfaces 4.1 are symmetrically distributed and are V-shaped. In this way, when the expansion wedge block 4 moves along the guide screw 3 toward the rotating shaft 2, the expansion wedge block 4 is pressed against the two expansion elements 1 through the inclined wedge surfaces 4.1, which is conducive to expanding the two expansion elements 1.
[0046] Further, such as Figure 1 As shown, the expansion element 1 is composed of a long steel frame, which includes two parallel main steel plates 1.1 and a connecting steel plate 1.2 connecting the two main steel plates 1.1 into one body, and the connecting steel plate 1.2 is welded to the main steel plates 1.1. The main steel plates 1.1 are perpendicular to the rotating shaft 2. Each main steel plate 1.1 is provided with an axial hole. The rotating shaft 2 passes through each main steel plate 1.1 of the two expansion elements 1 in sequence. In this way, the stability of the expansion element 1 can be ensured, and then the two adjacent prefabricated walls 6 can be reliably propped apart.
[0047] Of course, it should be noted that the expansion element 1 can also be made of other steel structures, such as angle steel, square steel, I-beam, H-beam, or other steel structures.
[0048] Further, such as Figure 1 As shown, the expansion element 1 is provided with the connecting steel plate 1.2 on the side facing the expansion wedge 4. Thus, when the expansion wedge 4 moves along the guide screw 3 toward the rotating shaft 2, the expansion wedge 4 will abut against the connecting steel plate 1.2 to spread the two expansion elements 1 apart.
[0049] Further, one end of the lead screw 3 is connected to the rotating shaft 2 by welding. In this way, the connection between the lead screw 3 and the rotating shaft 2 is facilitated, and the connection strength between the lead screw 3 and the rotating shaft 2 is ensured.
[0050] Furthermore, a screw positioning hole is provided on the rotating shaft 2, and one end of the lead screw 3 is inserted into the screw positioning hole. In this way, the lead screw 3 can be accurately installed at a specified position of the rotating shaft 2, and the installation orientation of the lead screw 3 is ensured to be accurate.
[0051] The rotating shaft 2 is a hollow rotating shaft 2 or a solid rotating shaft 2. In this embodiment, the rotating shaft 2 is a hollow rotating shaft 2.
[0052] Further, a gasket is provided on the lead screw 3, and the gasket is located between the locking nut 5 and the expansion wedge 4. In this way, during the process of tightening the locking nut 5, friction between the locking nut 5 and the expansion wedge 4 can be avoided.
[0053] Furthermore, there are two locking nuts 5. Of the two locking nuts 5, one locking nut 5 near the expansion wedge 4 is used to push the expansion wedge 4 to move and spread the two expansion elements 1 apart; the other locking nut 5 is tightened after the interlocking structure between the two adjacent prefabricated walls 6 is tightened to serve as an anti-loosening device for the locking nut 5 near the expansion wedge 4 to prevent the locking nut 5 from loosening. Specifically, after the latch-type expansion device is inserted between the two adjacent prefabricated walls 6, first tighten the locking nut 5 near the expansion wedge 4, move the expansion wedge 4 downward along the guide screw 3, and the expansion wedge 4 is pressed between the two expansion elements 1 to spread the two expansion elements 1 apart, thereby spreading the two adjacent prefabricated walls 6 apart in the horizontal direction until the interlocking structure between the two adjacent prefabricated walls 6 is tightened to each other; then, tighten the other locking nut 5 to press the two locking nuts 5 together to prevent the locking nuts 5 from loosening.
[0054] The above description is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent transformation made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.
Claims
1. A bolt-type expansion device for a prefabricated ground-connected wall, characterized in that: include: Two cross-distributed expansion elements (1) are hingedly connected via a rotating shaft (2); A guide screw (3) is located between the two expansion elements (1), one end of the guide screw (3) is connected to the rotating shaft (2) and extends radially along the rotating shaft (2), and a locking nut (5) is provided on the guide screw (3); An expansion wedge (4) sliding along the guide screw (3) is located between the two expansion elements (1), and the expansion wedge (4) and the rotating shaft (2) are located on the same side of the locking nut (5).
2. The plug-in expansion device for prefabricated ground-connected walls according to claim 1 is characterized in that: When the expansion wedge (4) moves along the guide screw (3) toward the rotating shaft (2), the expansion wedge (4) abuts between the two expansion elements (1) to spread the two expansion elements (1) apart.
3. The plug-in expansion device for prefabricated ground-connected wall according to claim 1, characterized in that: The two opposite side surfaces of the expansion wedge block (4) facing the two expansion elements (1) are inclined wedge surfaces (4.1), and the two inclined wedge surfaces (4.1) are distributed in a V shape.
4. A prefabricated ground-connected wall plug-in expansion device according to claim 1, 2 or 3, characterized in that: The two cross-distributed expansion elements (1) are distributed in an X shape.
5. A prefabricated ground-connected wall plug-in expansion device according to claim 1, 2 or 3, characterized in that: The expansion element (1) is composed of a long steel frame, which includes two main steel plates (1.1) parallel to each other and a connecting steel plate (1.2) connecting the two main steel plates (1.1) into one.
6. The plug-in expansion device for prefabricated ground-connected walls according to claim 5, characterized in that: The main steel plate (1.1) is perpendicular to the rotating shaft (2); an axial hole is provided on the main steel plate (1.1); and the rotating shaft (2) passes through each main steel plate (1.1) of the two expansion elements (1) in sequence.
7. The plug-in expansion device for prefabricated ground-connected walls according to claim 5, characterized in that: The expansion element (1) is provided with the connecting steel plate (1.2) on the side facing the expansion wedge (4).
8. A plug-in expansion device for a prefabricated ground-connected wall according to claim 1, 2 or 3, characterized in that: One end of the guide screw (3) is welded to the rotating shaft (2).
9. The plug-in expansion device for prefabricated ground-connected walls according to claim 8, characterized in that: The rotating shaft (2) is provided with a screw positioning hole, and one end of the guide screw (3) is inserted into the screw positioning hole.
10. A prefabricated ground-connected wall plug-in expansion device according to claim 1, 2 or 3, characterized in that: A gasket is provided on the guide screw (3), and the gasket is located between the locking nut (5) and the expansion wedge (4), and there are two locking nuts (5).