Connecting joint of underground diaphragm wall and structural slab

Abstract

In order to solve the problems of poor construction quality and poor water stop effect of the existing connection node, the utility model provides a connection node of an underground diaphragm wall and a structural slab, which comprises the underground diaphragm wall and the structural slab, a connecting structure capable of effectively improving the connecting quality and meeting the connecting and water stopping requirements is arranged between the underground diaphragm wall and the structural slab; the connecting structure comprises a shear groove, anchor bars and joint bars, the shear groove is formed in the side, close to the structural slab, of the underground diaphragm wall and located in the middle of the underground diaphragm wall, and the position, provided with the shear groove, of the underground diaphragm wall is filled with an extruded sheet. The connecting joint of the underground diaphragm wall and the structural slab is reasonable in overall design, simple in structure, convenient to operate and extremely convenient and fast to install, reliable connection, water stopping and shear resistance control of the joint are effectively achieved on the premise that construction quality is guaranteed, and the connecting joint is suitable for being used in the underground diaphragm wall and the structural slab. Therefore, great convenience is brought to the connection work of the underground connecting wall and the structural plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of building engineering construction, and particularly relates to a connection node between an underground continuous wall and a structural plate. Background Art

[0002] The underground continuous wall is a foundation project that uses a trenching machine on the ground to dig a long and narrow deep trench along the peripheral axis of the deep excavation project under the condition of mud wall protection. After the trench is cleared, a steel cage is suspended in the trench, and then underwater concrete is poured using the conduit method to form a unit trench section. This process is carried out section by section to build a continuous reinforced concrete wall underground as a water interception, anti-seepage, load-bearing and water retaining structure.

[0003] During the construction of cast-in-place concrete structures in construction projects, underground concrete structures often need to be cast in several blocks due to various factors, and then several concrete structures are connected together through structural plates. Under normal circumstances, during the construction of underground exterior wall structures and exterior wall structures, plate structures and plate structures, and exterior wall structures and plate structures, as well as waterproof nodes, holes are used to plant steel bars and pre-buried water-stop steel plates for connection and water-stopping. Steel bars and water-stop steel plates also play a role in structural shear resistance, ensuring the quality of engineering construction.

[0004] However, in some underground projects with poor working conditions, the design scheme of "two walls in one" will be involved, using the underground continuous wall enclosure structure as the main structure outer wall. For this type of design scheme, due to the construction conditions and time difference of the process, the connection between the underground ground-connected wall and the structural plate cannot be constructed using ordinary pre-buried water-stopping steel plate water-stopping measures, and the requirements of effective connection and water-stopping cannot be achieved, and the quality issues related to the connection nodes cannot be guaranteed, which brings great difficulty to the connection work of the underground connecting wall and the structural plate. Utility Model Content

[0005] In order to achieve effective connection and water-stopping requirements, the utility model provides a connection node between an underground continuous wall and a structural plate.

[0006] The technical solution of a connection node between an underground continuous wall and a structural plate of the utility model is as follows:

[0007] A connection node between an underground continuous wall and a structural plate, comprising an underground continuous wall and a structural plate, wherein the underground continuous wall and the structural plate are connected by a connection structure that can effectively improve the connection quality and meet the connection water-stopping requirements;

[0008] The connection structure comprises a shear groove, anchor bars and dowel bars, wherein the shear groove is arranged on one side of the underground continuous wall close to the structural plate and is located in the middle of the underground continuous wall, and an extruded board is filled at the position where the shear groove is arranged on the underground continuous wall;

[0009] The anchor bar is welded and arranged on the main bar in the underground continuous wall. The anchor bar is vertically distributed to the underground continuous wall. The anchor bar is provided in two rows and is respectively arranged at the upper and lower sides of the shear groove. The end of the anchor bar away from the structural plate is in the shape of a folded hook that is folded upward. The end of the anchor bar close to the structural plate is provided with a straight thread connector for connecting with the main bar of the structural plate.

[0010] The dowel bars are horizontally arranged inside the underground continuous wall. There are two groups of dowel bars, which are respectively arranged between the shear groove and the anchor bars arranged on the upper and lower sides thereof. Each group is provided with upper and lower rows of dowel bars. The end of the dowel bar away from the structural plate is in the shape of a short hook bent upward, and the end of the dowel bar close to the structural plate is in the shape of a long hook bent upward.

[0011] Furthermore, the length of the horizontal section of the anchor bar is greater than half of the width of the underground continuous wall and less than 2 / 3 of the width of the underground continuous wall, and the length of the horizontal section of the anchor bar is the same as the length of the hook-shaped folding hook section.

[0012] Furthermore, the length of the horizontal section of the inserted reinforcement is greater than 2 / 3 of the width of the underground continuous wall and less than 4 / 5 of the width of the underground continuous wall, and the length of the horizontal section of the inserted reinforcement is the same as the length of the long hook-shaped folded hook section.

[0013] Furthermore, the structural plate is a raft plate or a floor plate.

[0014] Furthermore, the underground continuous wall is provided with a continuous annular rubber water stop strip between the upper and lower rows of each group of dowel bars.

[0015] Furthermore, an expansion agent is applied on the surface of the rubber water stop strip.

[0016] Furthermore, a mesh is provided at the shear groove of the underground continuous connecting wall, and the mesh is fixedly tied to the main reinforcement of the underground continuous connecting wall.

[0017] The utility model discloses a connection node between an underground continuous wall and a structural plate. The connection node has an overall reasonable design, a simple structure, convenient operation and extremely convenient installation. Under the premise of ensuring construction quality, in the scheme of directly drilling holes for planting steel bars and pre-embedded waterstop steel plates, the method of directly drilling holes for planting steel bars is replaced by pre-embedded steel bars and straight threaded connectors, and the waterstop steel plates are replaced by rubber waterstop strips for water stopping. The shear resistance of the structure directly borne by the original direct drilling holes for planting steel bars and pre-embedded waterstop steel plates is optimized to a shear resistance form of a formed shear groove structure, which effectively achieves reliable connection, water stopping and shear resistance control of the node, thereby bringing great convenience to the connection work of the underground connecting wall and the structural plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1The utility model is a structural schematic diagram of a connection node between an underground continuous wall and a structural plate. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the utility model will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0020] Example 1

[0021] refer to Figure 1 A connection node between an underground continuous wall and a structural plate in this embodiment includes an underground continuous wall 100 and a structural plate 200. The underground continuous wall 100 and the structural plate 200 are connected by a connection structure that can effectively improve the connection quality and meet the connection water-stopping requirements. In this embodiment, the structural plate 200 is a raft plate or a floor plate.

[0022] The connection structure 300 includes a shear groove 310, anchor bars 320 and dowel bars 330. The shear groove 310 is arranged on one side of the underground continuous wall 100 close to the structural plate 200 and is located in the middle of the underground continuous wall 100. The position where the shear groove 310 is arranged in the underground continuous wall 100 is filled with an extruded board 500.

[0023] The anchor bar 320 is welded and installed on the main reinforcement in the underground continuous wall 100. The anchor bar 320 is distributed vertically to the underground continuous wall 100. The anchor bar 320 is provided in two rows and is respectively arranged at the upper and lower sides of the shear groove 310. The end of the anchor bar 320 away from the structural plate 200 is in the shape of an upwardly folded hook 321, and a straight threaded connector 322 for connecting to the main reinforcement of the structural plate 200 is provided on the end of the anchor bar 320 close to the structural plate 200.

[0024] The dowel bars 330 are horizontally arranged inside the underground continuous wall 100. There are two groups of dowel bars 330, which are respectively arranged between the shear groove 310 and the anchor bars 320 arranged on the upper and lower sides thereof. Each group is provided with upper and lower rows of dowel bars 330. The end of the dowel bar 330 away from the structural plate 200 is a short curved hook 331 bent upward, and the end of the dowel bar 330 close to the structural plate 200 is a long curved hook 332 bent upward. The effective combination of the short curved hook 331 and the long curved hook 332 can effectively improve the firmness of the upper underground continuous wall and the structural plate, and increase the degree of combination between the dowel bar and the concrete.

[0025] The length of the horizontal section of the anchor bar 320 is greater than half of the width of the underground continuous wall 100 and less than 2 / 3 of the width of the underground continuous wall 100 . The length of the horizontal section of the anchor bar 320 is the same as the length of the hook section of the hook 321 .

[0026] The length of the horizontal section of the dowel bar 330 is greater than 2 / 3 of the width of the underground continuous wall 100 and less than 4 / 5 of the width of the underground continuous wall 100. The length of the horizontal section of the dowel bar 330 is the same as the length of the hook section of the long curved hook 332. By utilizing the above size ratio, the connection between the underground continuous wall and the structural plate can be firmly connected and more stable.

[0027] The underground continuous wall 100 is provided with a continuous ring-shaped rubber water stop strip 400 between the upper and lower rows of each group of dowel bars 330. The rubber water stop strip 400 can effectively improve the water stop effect of the connection node.

[0028] The surface of the rubber water stop strip 400 is coated with an expansion agent. Coating the expansion agent on the surface of the rubber water stop strip can enable the rubber water stop strip to expand effectively after encountering water, thereby further effectively improving the anti-seepage effect of the node.

[0029] A mesh is provided at the shear groove 310 of the underground continuous diaphragm wall 100, and the mesh is fixedly tied to the main reinforcement of the underground continuous diaphragm wall. The mesh is used to effectively reinforce the shear groove 310 and enhance the anti-cracking ability of the concrete.

[0030] Embodiment: According to the requirements of the structural design drawings, the underground continuous dummy wall and the raft slab should be reliably connected and effectively controlled for water stopping. This example uses the connection between the underground continuous dummy wall and the raft slab as an example. The underground continuous dummy wall is a "two-wall-in-one" design, that is, the wall quality, additives, strength at the joints and waterproofing should meet the design requirements. The thickness is 800mm, the strength grade is C40, the anti-seepage grade is P10, the thickness of the main reinforcement protection layer is 50mm on the pit surface and 70mm on the soil surface. To ensure the thickness of the underground continuous dummy wall protection layer and the protection of the internal embedded parts, protective iron is set on the wall side of the underground continuous dummy wall; the raft slab is 1000mm thick, the strength grade is C40, the anti-seepage grade is P10, the top steel bar of the slab is a two-way grade III steel bar 22@150 full length, the bottom of the slab is a two-way grade III steel bar 18@150 full length, and additional bars are set. Shear grooves, anchor bars, dowel bars, straight thread connectors, and rubber water stop strips are set at the connection between the underground continuous dummy wall and the raft slab.

[0031] A connection node between an underground continuous wall and a structural plate in the present embodiment has a reasonable overall design, a simple structure, easy operation and extremely convenient installation. Under the premise of ensuring construction quality, in the scheme of directly drilling holes for planting steel bars and pre-embedded waterstop steel plates, the method of directly drilling holes for planting steel bars is replaced by pre-embedded steel bars and straight threaded connectors, and the waterstop steel plates are replaced by rubber waterstop strips for waterstopping. The shear resistance of the structure directly borne by the original direct drilling holes for planting steel bars and pre-embedded waterstop steel plates is optimized to a shear resistance form of a formed shear groove structure, which effectively achieves reliable connection, waterstopping and shear resistance control of the node, thereby bringing great convenience to the connection work of the underground connecting wall and the structural plate.

[0032] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A connection node between an underground continuous wall and a structural plate, comprising an underground continuous wall and a structural plate, wherein the underground continuous wall (100) and the structural plate (200) are connected by a connection structure (300) that can effectively improve the connection quality and meet the connection water-stopping requirements; It is characterized in that The connection structure (300) comprises a shear groove (310), anchor bars (320) and dowel bars (330); the shear groove (310) is arranged on a side of the underground continuous wall (100) close to the structural plate (200) and is located in the middle of the underground continuous wall (100); and an extruded board (500) is filled at the position where the shear groove (310) is arranged on the underground continuous wall (100); The anchor bar (320) is welded and arranged on the main bar in the underground continuous wall (100). The anchor bar (320) is vertically distributed with respect to the underground continuous wall (100). The anchor bar (320) is provided in two rows and is respectively arranged at the upper and lower sides of the shear groove (310). The end of the anchor bar (320) away from the structural plate (200) is in the shape of an upwardly folded hook (321). The end of the anchor bar (320) close to the structural plate (200) is provided with a straight thread connector (322) for connecting with the main bar of the structural plate (200); The inserted bars (330) are horizontally arranged inside the underground continuous wall (100). There are two groups of the inserted bars (330), which are respectively arranged between the shear groove (310) and the anchor bars (320) arranged on the upper and lower sides thereof. Each group is provided with two upper and lower rows of inserted bars (330). The end of the inserted bar (330) away from the structural plate (200) is in the shape of a short hook (331) bent upward, and the end of the inserted bar (330) close to the structural plate (200) is in the shape of a long hook (332) bent upward.

2. The connection node between the underground continuous wall and the structural plate according to claim 1, characterized in that: The length of the horizontal section of the anchor bar (320) is greater than half the width of the underground continuous wall (100) and less than 2 / 3 of the width of the underground continuous wall (100). The length of the horizontal section of the anchor bar (320) is the same as the length of the hook section of the hook shape (321).

3. The connection node between the underground continuous wall and the structural plate according to claim 1, characterized in that: The length of the horizontal section of the dowel (330) is greater than 2 / 3 of the width of the underground continuous wall (100) and less than 4 / 5 of the width of the underground continuous wall (100). The length of the horizontal section of the dowel (330) is the same as the length of the folded hook section of the long curved hook (332).

4. The connection node between the underground continuous wall and the structural plate according to claim 1, characterized in that: The structural plate (200) is a raft plate or a floor plate.

5. The connection node between the underground continuous wall and the structural plate according to claim 1, characterized in that: The underground continuous wall (100) is provided with a continuous annular rubber water stop strip (400) between the upper and lower rows of each group of dowel bars.

6. The connection node between the underground continuous wall and the structural plate according to claim 5, characterized in that: An expansion agent is applied on the surface of the rubber water stop strip (400).

7. The connection node between the underground continuous wall and the structural plate according to claim 1, characterized in that: A mesh is provided at the shear groove (310) of the underground continuous wall (100), and the mesh is fixedly tied to the main reinforcement of the underground continuous wall.

Images