A vertical joint connecting device and construction method of a fabricated underground continuous wall

Abstract

The application provides an assembled underground continuous wall vertical seam connecting device and a construction method. The assembled underground continuous wall vertical seam connecting device comprises: a positioning guide rail arranged on the end face of one of two adjacent assembled underground continuous walls at a vertical seam joint in a height direction; and at least two groups of guide inserts arranged horizontally and longitudinally on the end face of the other of the two adjacent assembled underground continuous walls at the vertical seam joint. Each group of the guide inserts is provided with a slot matched with the positioning guide rail. The slot is inserted into and slidably matched with the positioning guide rail. The application improves the alignment accuracy and construction efficiency of the two adjacent assembled underground continuous walls at the vertical seam joint, reduces the alignment difficulty, ensures the splicing quality, and avoids the problem that particles are stuck and cannot sink into the later assembled underground continuous wall.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and in particular to a vertical joint connection device and construction method for prefabricated underground continuous walls. Background Technology

[0002] Diaphragm walls, as a key technology for foundation pit support, are increasingly widely used in urban underground engineering. Diaphragm walls are generally constructed using on-site casting, which has the following disadvantages: 1. On-site binding of the reinforcing cage requires a large site; hoisting the reinforcing cage requires numerous pieces of equipment; 2. Large hoisting clearance leads to high construction risks; 3. Concrete is prone to mud inclusion, and the reinforcing bars become covered in mud when lowering the cage, reducing the bond strength between the concrete and the reinforcing bars, making it difficult to guarantee the quality of the wall. To overcome the problems of on-site casting of diaphragm walls, this field has begun to explore the construction of prefabricated diaphragm walls. During construction, the following problems were encountered: 1. Grouting is used to seal the vertical joints of prefabricated diaphragm walls on the same horizontal line, but the construction quality cannot be guaranteed. The grouted portion is prone to detaching from the precast wall, making it difficult to guarantee the sealing effect of the wall joint; 2. The overall stability of the diaphragm wall joints is difficult to guarantee, the internal gaps of the joints are difficult to seal, and the impermeability of the joints is difficult to guarantee; 3. The structural type and dimensions of the diaphragm wall panels are prefabricated in the factory, requiring high precision for on-site installation. Summary of the Invention

[0003] The purpose of this invention is to provide a vertical joint connection device and construction method for prefabricated diaphragm walls, so as to solve the problems of difficulty in aligning two adjacent prefabricated diaphragm walls at the vertical joint node and poor construction quality.

[0004] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: a vertical joint connection device for prefabricated underground continuous walls, comprising:

[0005] The positioning guide rail is set along the height direction on the end face of one of the two adjacent prefabricated diaphragm walls at the vertical joint node.

[0006] The guide plugs, in at least two sets, are horizontally spaced longitudinally on the end face of another prefabricated diaphragm wall between two adjacent prefabricated diaphragm walls at the vertical joint node. Each set of guide plugs is provided with a slot that matches the positioning guide rail. The slot is inserted into and slidably engaged with the positioning guide rail.

[0007] Furthermore, the vertical joint connection device for prefabricated diaphragm walls provided by the present invention further includes:

[0008] An expansion rubber strip is sealed onto the slot, and the slot slides relative to the positioning guide rail via the expansion rubber strip.

[0009] Furthermore, the vertical joint connection device for prefabricated diaphragm walls provided by the present invention further includes:

[0010] Anchors, in multiple forms;

[0011] Each of the positioning guide rails is provided with at least two of the anchors, and the positioning guide rails are anchored to the prefabricated underground continuous wall of the corresponding block by means of the anchors thereon;

[0012] Each of the guide plugs is provided with an anchor, and the guide plug is anchored to the corresponding block of the prefabricated underground continuous wall by means of the anchor.

[0013] Furthermore, in the prefabricated underground continuous wall vertical joint connection device provided by the present invention, the positioning guide rail and the anchor on it are a separate structure or an integrated structure; the guide plug and the anchor on it are a separate structure or an integrated structure.

[0014] Furthermore, the prefabricated diaphragm wall vertical joint connection device provided by the present invention is provided in which the prefabricated diaphragm wall is a double-skin wall, and the positioning guide rail is provided on the end face of each skin of the prefabricated diaphragm wall of the corresponding block; and the guide plug is provided on the end face of each skin of the prefabricated diaphragm wall of the corresponding block.

[0015] Furthermore, in the prefabricated underground continuous wall vertical joint connection device provided by the present invention, the outer contour shape of the cross-section of the positioning guide rail is the same as the shape of the slot, both being a semicircle greater than 1 / 2.

[0016] Furthermore, the present invention provides a vertical joint connection device for a prefabricated diaphragm wall, wherein the prefabricated diaphragm wall is a solid wall.

[0017] To solve the above-mentioned technical problems, another technical solution provided by the present invention is: a construction method for prefabricated underground continuous wall, which adopts the above-mentioned vertical joint connection device for prefabricated underground continuous wall.

[0018] A positioning guide rail is installed along the height direction on the end face of one of the two adjacent prefabricated diaphragm walls at the vertical joint node.

[0019] At least two sets of guide plugs are set horizontally at longitudinal intervals on the end face of the other prefabricated diaphragm wall between two adjacent prefabricated diaphragm walls at the vertical joint node.

[0020] The prefabricated diaphragm wall with positioning guide rails is sunk into the trench.

[0021] The prefabricated diaphragm wall with guide plugs is inserted into the positioning guide rail of the prefabricated diaphragm wall with positioning guide rail through the slot of the guide plugs, so that the prefabricated diaphragm wall with guide plugs slides into the trench along the prefabricated diaphragm wall with positioning guide rail.

[0022] Furthermore, in the prefabricated diaphragm wall vertical construction method provided by the present invention, before the prefabricated diaphragm wall with guide plug is sunk into the trench, an expansion rubber strip is installed in the slot of the guide plug of the prefabricated diaphragm wall with guide plug.

[0023] Furthermore, the prefabricated diaphragm wall construction method provided by the present invention is that the prefabricated diaphragm wall is a double-skin wall. A lateral wall is provided between the ends of the vertical joint nodes of the double-skin wall of the prefabricated diaphragm wall with guide plugs. A water-stop steel plate is pre-embedded in the lateral wall. The water-stop steel plate extends through the vertical joint nodes into the double-skin wall of the prefabricated diaphragm wall with positioning guide rails.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] The present invention provides a vertical joint connection device and construction method for prefabricated diaphragm walls. Positioning guide rails and guide plugs are correspondingly positioned on the opposite end faces of two adjacent prefabricated diaphragm walls at the vertical joint node. This allows the two adjacent prefabricated diaphragm walls to be inserted into the positioning guide rail through slots in the guide plugs and slide into place. This allows the subsequently sunk prefabricated diaphragm wall to slide into place along the positioning guide rail of the previously sunk prefabricated diaphragm wall via the slots. The insertion and connection between the guide plugs and the positioning guide rails ensures that the two prefabricated diaphragm walls do not detach during splicing. This not only improves the alignment accuracy and reduces the alignment difficulty of the two prefabricated diaphragm walls at the vertical joint node, but also ensures the splicing quality of the two prefabricated diaphragm walls at the vertical joint node. The sliding relationship also improves the construction efficiency of the subsequent prefabricated diaphragm wall, overcoming the problem of repeated calibration and alignment with the preceding prefabricated diaphragm wall during the traditional sinking process. It offers the advantages of convenient, simple, and rapid construction.

[0026] The vertical joint connection device and construction method for prefabricated diaphragm walls provided by this invention have guide plugs that are longitudinally spaced and dispersed, rather than being arranged along the entire length of the wall. This avoids the problem that the guide plug slots and positioning guide rails may be stuck by particles such as stones when sliding, preventing the diaphragm wall from continuing to sink downwards during assembly. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the plan structure for the construction of two adjacent prefabricated double-skin diaphragm walls;

[0028] Figure 2 This is a schematic diagram of the elevation structure of two adjacent prefabricated double-skin diaphragm walls.

[0029] Figure 3 This is a structural schematic diagram of the vertical joint connection device for prefabricated underground continuous walls;

[0030] Figure 4 This is an exploded structural diagram of the vertical joint connection device for prefabricated underground continuous walls;

[0031] Figure 5 This is a schematic diagram of the plan structure for the construction of two adjacent prefabricated solid diaphragm walls;

[0032] As shown in the figure:

[0033] 10. Front wall;

[0034] 20. Rear wall surface;

[0035] 30. Lateral walls;

[0036] 100. The first prefabricated diaphragm wall;

[0037] 200. Second type of prefabricated diaphragm wall;

[0038] 300. Vertical joint connection device for prefabricated diaphragm wall; 310. Positioning guide rail; 320. Guide plug; 321. Slot; 330. Anchor; 340. Expansion rubber strip.

[0039] 400. Water-stop steel plate. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0041] Please refer to Figures 1 to 4 This invention provides a vertical joint connection device 300 for prefabricated diaphragm walls, comprising at least a positioning guide rail 310 and a guide plug 320, wherein:

[0042] The positioning guide rail 310 is set along the height direction on the end face of one of the two adjacent prefabricated diaphragm walls at the vertical joint node.

[0043] The guide plug-in 320, in at least two sets, is set horizontally at longitudinal intervals on the end face of another prefabricated diaphragm wall between two adjacent prefabricated diaphragm walls at the vertical joint node. Each set of the guide plug-in 320 is provided with a slot 321 that matches the positioning guide rail 310. The slot 321 is inserted into and slidably engaged with the positioning guide rail 310.

[0044] The figure illustrates that the positioning guide rail 310 is set on the end face of the first prefabricated diaphragm wall 100, and the positioning plug 320 is set on the end face of the second prefabricated diaphragm wall 200.

[0045] Please refer to Figures 1 to 4 In order to mount the positioning guide rail 310 on the end face of the first prefabricated diaphragm wall 100 and the guide plug 320 on the second prefabricated diaphragm wall 200, the vertical joint connection device 300 for the prefabricated diaphragm wall provided in this embodiment of the invention may further include multiple anchors 330. Each positioning guide rail 310 is anchored to the first prefabricated diaphragm wall 100 by at least two anchors 330, and each guide plug 320 is anchored to the second prefabricated diaphragm wall 200 by one anchor 330. The positioning guide rail 310 and the anchor 330 can be separate welded structures (i.e., separate structures) or integrally formed structures (i.e., integral structures). Similarly, the guide plug 320 and the anchor 330 can be separate welded structures or integrally formed structures.

[0046] Please refer to Figures 1 to 4 Anchor 330 can be composed of an anchor plate and anchor bars. The anchor plate is attached to the end face of the prefabricated diaphragm wall, and the anchor bars are anchored into the prefabricated diaphragm wall.

[0047] Please refer to Figures 1 to 2 The vertical joint connection device 300 for prefabricated diaphragm walls provided in this embodiment of the invention comprises a double-skin wall consisting of a front skin 10 and a rear skin 20. Positioning guide rails 310 are provided on the end face of each skin of the corresponding block of the prefabricated diaphragm wall; guide inserts 320 are also provided on the end face of each skin of the corresponding block of the prefabricated diaphragm wall. The double-skin walls can be connected by trusses (not shown). The hollow portion between the double-skin walls is constructed by post-casting, which has the advantage of resulting in a lighter overall weight and easier hoisting of the prefabricated diaphragm wall. In this case, the vertical joint connection device 300 between the vertical joint nodes of two adjacent diaphragm walls includes two positioning guide rails 310 and at least four guide inserts 320.

[0048] Please refer to Figure 2To improve the sealing performance between the guide plug 320 and the positioning guide rail 310, the vertical joint connection device 300 for prefabricated underground continuous wall provided in this embodiment of the invention may further include: an expansion rubber strip 340, which is sealed on the slot 321, and the slot 321 slides relative to the positioning guide rail 310 through the expansion rubber strip 340. The expansion rubber strip 340 expands upon contact with water during the sinking process, improving the sealing performance between the guide plug 320 and the positioning guide rail 310.

[0049] Please refer to Figure 1 and Figures 3 to 4 To prevent adjacent diaphragm walls from detaching at the vertical joint joint after being connected by the vertical joint connection device 300, the vertical joint connection device 300 for the prefabricated diaphragm wall provided in this embodiment of the invention has a positioning guide rail 310 with the same cross-sectional outer contour shape as the slot 321. Both can be a semicircle greater than 1 / 2, but are not limited to a semicircle; they can be other shapes that allow for insertion and sliding fit. Therefore, after the guide plug 320 is inserted into the positioning guide rail 310 through the slot 321, the guide plug 320 and the positioning guide rail 310 will not detach, thus preventing the adjacent diaphragm walls from detaching at the vertical joint joint. This improves the reliability and stability of the connection and enhances construction quality.

[0050] Please refer to Figures 1 to 4 This invention also provides a construction method for a prefabricated diaphragm wall, which uses the above-mentioned vertical joint connection device for the prefabricated diaphragm wall and may include the following steps:

[0051] Step 501: A positioning guide rail 310 is installed along the height direction on the end face of one of the two adjacent prefabricated diaphragm walls at the vertical joint node. In this embodiment, the positioning guide rail 310 is installed on the first prefabricated diaphragm wall 100.

[0052] Step 502: At least two sets of guide plugs 320 are longitudinally spaced horizontally on the end face of another prefabricated diaphragm wall at the vertical joint node. In this embodiment, the guide plugs 320 are disposed on the second prefabricated diaphragm wall 200.

[0053] Step 503: The prefabricated diaphragm wall with positioning guide rail 310 is sunk into the trench, that is, the first prefabricated diaphragm wall 100 with positioning guide rail 310 is sunk for construction.

[0054] Step 504: Before the prefabricated diaphragm wall with guide plug 320 is sunk into the trench, an expansion rubber strip 340 is installed in the slot 321 of the guide plug 320 of the prefabricated diaphragm wall with guide plug 320.

[0055] Step 505: The prefabricated diaphragm wall with guide plug 320 is inserted into the positioning guide rail 310 of the prefabricated diaphragm wall with positioning guide rail 310 through the slot 321 of the guide plug 320, so that the prefabricated diaphragm wall with guide plug 320 slides into the trench along the prefabricated diaphragm wall with positioning guide rail 310. That is, the second prefabricated diaphragm wall 200 with guide plug 320 is sunk for construction.

[0056] Please refer to Figure 1 To improve the water-stopping effect, the construction method of the prefabricated diaphragm wall provided in this embodiment of the invention includes a prefabricated diaphragm wall that can be a double-layered wall. A lateral wall 30 is provided between the ends of the vertical joint nodes of the double-layered diaphragm wall with guide inserts 320. A water-stopping steel plate 400 is pre-embedded in the lateral wall 30. The water-stopping steel plate 400 extends through the vertical joint nodes between the double-layered diaphragm walls with positioning guide rails 310. The water-stopping steel plate 400 can improve the water-stopping performance of two adjacent prefabricated diaphragm walls at the vertical joint nodes.

[0057] Please refer to Figure 5 To broaden its applicability, this invention provides a vertical joint connection device 300 and a construction method for prefabricated diaphragm walls, wherein the prefabricated diaphragm wall can be a solid wall. In this case, the vertical joint connection device 300 includes a positioning guide rail 310 and two guide inserts 320.

[0058] Please refer to Figures 1 to 2 and Figure 5 The vertical joint connection device 300 and construction method for prefabricated diaphragm walls provided in this embodiment of the invention, wherein the positioning guide rail 310 and the guide plug 320 are correspondingly set on the two opposite end faces of two adjacent prefabricated diaphragm walls at the vertical joint node, so that the two adjacent prefabricated diaphragm walls are inserted into the positioning guide rail 310 through the slot 321 in the guide plug 320 and slide to engage, so that the later-sinking prefabricated diaphragm wall slides into the positioning guide rail 310 of the earlier-sinking prefabricated diaphragm wall through the slot 321. The insertion connection between the guide plug 320 and the positioning guide rail 310 ensures that the two prefabricated diaphragm walls do not separate during splicing. This not only improves the alignment accuracy of the two prefabricated diaphragm walls at the vertical joint node and reduces the alignment difficulty, but also ensures the splicing quality of the two prefabricated diaphragm walls at the vertical joint node. The sliding relationship also improves the construction efficiency of the later-sinking prefabricated diaphragm wall and overcomes the problem that the traditional later-sinking prefabricated diaphragm wall needs to be repeatedly calibrated and aligned with the earlier prefabricated diaphragm wall during the sinking process. It features convenient, simple, and fast construction.

[0059] Please refer to Figure 2 The vertical joint connection device 300 and construction method of the prefabricated diaphragm wall provided in this embodiment of the invention have guide plugs 320 that are longitudinally spaced and dispersed, rather than being set along the height in a continuous manner. This can avoid the problem that the slots 321 of the guide plugs 320 and the positioning guide rails 310 are stuck by particles such as stones when sliding, which would prevent the diaphragm wall from continuing to sink downwards during the subsequent assembly process.

[0060] Two adjacent prefabricated diaphragm walls can be on the same straight line or not on the same straight line.

[0061] This invention is not limited to the specific embodiments described above. Obviously, the embodiments described above are only a part of the embodiments of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this invention are within the scope of protection of this invention. Those skilled in the art can make other modifications and variations to this invention. Therefore, if these modifications and variations of this invention fall within the scope of the claims of this invention, then this invention also intends to include these modifications and variations.

Claims

1. A vertical joint connecting device for an assembled diaphragm wall, characterized in that, include: The positioning guide rail is set along the height direction on the end face of one of the two adjacent prefabricated diaphragm walls at the vertical joint node. The guide plugs, in at least two sets, are horizontally spaced longitudinally on the end face of another prefabricated diaphragm wall between two adjacent prefabricated diaphragm walls at the vertical joint node. Each set of guide plugs is provided with a slot that matches the positioning guide rail. The slot is inserted into and slidably engaged with the positioning guide rail.

2. The vertical joint connecting device of the assembled diaphragm wall according to claim 1, characterized in that, Also includes: An expansion rubber strip is sealed onto the slot, and the slot slides relative to the positioning guide rail via the expansion rubber strip.

3. The vertical joint connecting device of the assembled diaphragm wall according to claim 1, characterized in that, Also includes: Anchors, in multiple forms; Each of the positioning guide rails is provided with at least two of the anchors, and the positioning guide rails are anchored to the corresponding block of the prefabricated underground continuous wall by the anchors thereon; Each of the guide plugs is provided with an anchor, and the guide plug is anchored to the corresponding block of the prefabricated underground continuous wall by means of the anchor.

4. The vertical joint connecting device of the assembled diaphragm wall according to claim 3, characterized in that, The positioning guide rail and its anchor are either separate or integrated structures; the guide plug and its anchor are either separate or integrated structures.

5. The vertical joint connecting device of the assembled diaphragm wall according to claim 1, wherein The prefabricated diaphragm wall is a double-layer wall, and the positioning guide rail is provided on the end face of each layer of the prefabricated diaphragm wall in the corresponding block; the guide plug is provided on the end face of each layer of the prefabricated diaphragm wall in the corresponding block.

6. The vertical joint connecting device of the assembled diaphragm wall according to claim 1, wherein The cross-sectional outer contour shape of the positioning guide rail is the same as that of the slot, both being a semicircle greater than 1 / 2.

7. The vertical joint connecting device of the assembled diaphragm wall according to claim 1, wherein The prefabricated diaphragm wall is a solid wall.

8. A construction method of a fabricated underground continuous wall, characterized by, The vertical joint connection device for prefabricated underground continuous wall as described in any one of claims 1 to 7 above; A positioning guide rail is installed along the height direction on the end face of one of the two adjacent prefabricated diaphragm walls at the vertical joint node. At least two sets of guide plugs are set horizontally at longitudinal intervals on the end face of the other prefabricated diaphragm wall between two adjacent prefabricated diaphragm walls at the vertical joint node. The prefabricated diaphragm wall with positioning guide rails is sunk into the trench. The prefabricated diaphragm wall with guide plugs is inserted into the positioning guide rail of the prefabricated diaphragm wall with positioning guide rail through the slot of the guide plugs, so that the prefabricated diaphragm wall with guide plugs slides into the trench along the prefabricated diaphragm wall with positioning guide rail.

9. The construction method of a fabricated diaphragm wall according to claim 8, wherein Before the prefabricated diaphragm wall with guide plugs is sunk into the trench, an expansion rubber strip is installed in the slot of the guide plug of the prefabricated diaphragm wall with guide plugs.

10. The construction method of a fabricated diaphragm wall according to claim 8, wherein The prefabricated diaphragm wall is a double-skin wall. A lateral wall is provided between the ends of the vertical joint nodes of the double-skin wall of the prefabricated diaphragm wall with guide plugs. A water-stop steel plate is pre-embedded in the lateral wall. The water-stop steel plate extends through the vertical joint nodes into the double-skin wall of the prefabricated diaphragm wall with positioning guide rails.

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