Combined prefabricated ground wall single body

Abstract

The utility model discloses a combined type prefabricated ground wall single body, and aims to provide the combined type prefabricated ground wall single body which not only can meet the bending strength requirement of an enclosure structure, but also can effectively solve the problems that the quantity of pile insertion soil squeezing and soil replacement of a prefabricated reinforced concrete wall is large, and the wall sinking is difficult. The structure comprises an upper prefabricated reinforced concrete wall body; the lower section steel supporting legs are positioned below the upper prefabricated reinforced concrete wall body and are distributed in a manner of extending up and down; the embedded bolt assemblies are embedded in the lower end of the upper prefabricated reinforced concrete wall body, and the upper ends of the lower profile steel supporting legs are detachably connected to the lower end of the upper prefabricated reinforced concrete wall body through the embedded bolt assemblies.

Description

Technical Field

[0001] The utility model relates to an underground continuous wall, in particular to a combined prefabricated ground wall monomer. 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, cast-in-place underground continuous walls have the disadvantages of long construction time, underwater concrete pouring and other factors, and are prone to underwater concrete mud inclusions and wall breakage, which are difficult to control.

[0003] The prefabricated underground continuous wall technology can solve the above problems well. At the same time, it also has the advantages of high strength, factory production, high construction efficiency, saving construction site and green environmental protection. However, the current prefabricated underground continuous wall is generally composed of prefabricated reinforced concrete wall, which has the following shortcomings: the amount of soil squeezed and replaced during the insertion of the prefabricated reinforced concrete wall is large, the wall is difficult to sink, and the construction disturbance is increased; in order to successfully pile the prefabricated reinforced concrete wall, it is often necessary to dilute the mud concentration, which affects the wall protection effect. Utility Model Content

[0004] The purpose of the utility model is to provide a combined prefabricated ground wall monomer, which can not only meet the bending strength requirements of the enclosure structure, but also effectively improve the problem of large amount of soil extrusion and replacement of prefabricated reinforced concrete walls and difficulty in sinking walls.

[0005] The technical solution of the utility model is:

[0006] A combined prefabricated ground wall unit, comprising:

[0007] The upper part is prefabricated reinforced concrete wall;

[0008] The lower steel legs are located below the upper prefabricated reinforced concrete wall and extend upward and downward;

[0009] If an embedded bolt assembly is provided, it is embedded in the lower end of the upper precast reinforced concrete wall, and the upper end of the lower steel leg is detachably connected to the lower end of the upper precast reinforced concrete wall through the embedded bolt assembly. The combined precast ground wall monomer of this scheme is designed to meet the requirements of the bending strength of the underground retaining structure, which has high requirements for the upper bending strength and small force on the lower part. The upper wall is set as the upper precast reinforced concrete wall to meet the requirements of the bending strength of the retaining structure; the lower wall is set as the lower steel leg made of steel. On the one hand, the stiffness of the lower steel leg can meet the requirements. On the other hand, the cross-sectional area of ​​the lower steel leg made of steel is small, and the amount of soil squeezed and replaced by piles is small. Therefore, it can effectively improve the problem of large amount of soil squeezed and replaced by piles in precast reinforced concrete walls, which makes it difficult to sink the wall. At the same time, it can effectively solve the problem of the need to dilute the mud concentration in order to smoothly insert piles, which affects the wall protection effect, and is conducive to the realization of micro-disturbance construction.

[0010] Preferably, the embedded bolt assembly comprises:

[0011] Embedded steel bars are embedded in the lower end of the upper prefabricated reinforced concrete wall;

[0012] The embedded sleeve is embedded in the lower end of the upper prefabricated reinforced concrete wall, the embedded steel bar is connected with the embedded sleeve as a whole, the embedded sleeve is provided with a connecting screw hole with an opening facing downward, and the lower end of the connecting screw hole is connected with the lower end surface of the upper prefabricated reinforced concrete wall;

[0013] The connecting bolts are connected with the connecting screw holes. In this way, the lower steel legs can be conveniently connected with the upper prefabricated reinforced concrete wall through the embedded bolt assembly.

[0014] Preferably, the inner hole of the embedded sleeve is a threaded hole, and the threaded hole constitutes the connecting screw hole, so as to facilitate the actual processing and manufacturing of the embedded sleeve.

[0015] Preferably, the embedded steel bar is extended upward and downward, the lower end of the embedded steel bar and the lower end of the embedded sleeve extend into the embedded sleeve, and the embedded steel bar is connected to the embedded sleeve by thread and / or welding. In this way, the connection between the embedded steel bar and the embedded sleeve is convenient and the connection between the embedded steel bar and the embedded sleeve is stable.

[0016] Preferably, the embedded bolt assembly includes an embedded screw rod and a connecting nut matched with the embedded screw rod, the embedded screw rod is embedded in the lower end of the upper prefabricated reinforced concrete wall, and the connecting nut is located below the upper prefabricated reinforced concrete wall. In this way, the lower steel support leg can be conveniently connected to the upper prefabricated reinforced concrete wall through the embedded bolt assembly.

[0017] Preferably, a connection end plate is provided at the upper end of the lower steel leg, and a plurality of connection holes corresponding to the embedded bolt assemblies are provided on the connection end plate, and the embedded bolt assemblies connect the lower steel leg with the upper prefabricated reinforced concrete wall through the corresponding connection holes. In this way, the lower steel leg can be conveniently connected with the upper prefabricated reinforced concrete wall through the embedded bolt assemblies.

[0018] As a preferred embodiment, the connecting end plate is connected to the lower section steel leg by welding, so as to facilitate the connection and manufacture of the connecting end plate and the lower section steel leg, and ensure the connection strength and stability of the connecting end plate and the lower section steel leg.

[0019] Preferably, each embedded bolt assembly is arranged in two rows, and each row of embedded bolt assemblies includes at least two embedded bolt assemblies, so as to ensure the connection reliability between the lower steel support leg and the upper prefabricated reinforced concrete wall.

[0020] Preferably, the lower steel legs are made of H-shaped steel. In this way, the rigidity and bending strength requirements of the lower steel legs can be met; and the amount of soil extruded and replaced by the H-shaped steel piles is small, which can effectively solve the problem of the difficulty of sinking the wall due to the large amount of soil extruded and replaced by the piles of the prefabricated reinforced concrete wall.

[0021] Preferably, the cross-section of the upper prefabricated reinforced concrete wall is I-shaped.

[0022] The beneficial effects of the utility model are as follows: it can not only meet the bending strength requirements of the enclosure structure, but also effectively improve the problem of large soil displacement and difficulty in sinking the wall caused by pile insertion in the prefabricated reinforced concrete wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an implementation mode of the combined prefabricated floor wall monomer of the utility model.

[0024] Figure 2 yes Figure 1 A schematic diagram of a cross-sectional structure at AA in the middle (the lower steel leg in this figure is composed of an H-shaped steel).

[0025] Figure 3 yes Figure 1 Schematic diagram of another cross-sectional structure at AA in the middle (the lower steel leg in this figure is composed of two H-shaped steels).

[0026] In the figure:

[0027] Upper prefabricated reinforced concrete wall 1;

[0028] Lower steel support leg 2;

[0029] Connect the end plate 3 and the via 3.1;

[0030] Embedded bolt assembly 4, embedded steel bar 4.0, embedded sleeve 4.1, connecting bolt 4.2. DETAILED DESCRIPTION

[0031] Specific embodiment 1, as Figure 1 , Figure 2 As shown, a combined prefabricated ground wall unit includes an upper prefabricated reinforced concrete wall 1, a lower steel support leg 2 and a plurality of embedded bolt assemblies 4.

[0032] The lower steel support legs 2 are located below the upper prefabricated reinforced concrete wall 1, and the lower steel support legs 2 are extended upward and downward.

[0033] The embedded bolt assembly 4 is embedded in the lower end of the upper prefabricated reinforced concrete wall 1. In this embodiment, the embedded bolt assembly 4 includes embedded steel bars 4.0, embedded sleeves 4.1 and connecting bolts 4.2. The embedded steel bars 4.0 are embedded in the lower end of the upper prefabricated reinforced concrete wall 1. The embedded steel bars 4.0 are distributed extending up and down. The embedded sleeves 4.1 are embedded in the lower end of the upper prefabricated reinforced concrete wall 1. The lower end of the embedded steel bars 4.0 is connected to the embedded sleeves 4.1 as a whole. The embedded sleeves 4.1 are provided with connecting screw holes with the opening facing downward. The lower port of the connecting screw hole is connected to the lower end surface of the upper prefabricated reinforced concrete wall 1. The connecting bolts 4.2 are connected to the connecting screw holes.

[0034] The upper end of the lower steel leg 2 is detachably connected to the lower end of the upper prefabricated reinforced concrete wall 1 through the embedded bolt assembly 4. Specifically, the upper end of the lower steel leg 2 is provided with a connecting end plate 3, and the connecting end plate 3 is provided with a plurality of connecting through holes 3.1 corresponding to the embedded bolt assembly 4. The embedded bolt assembly 4 connects the lower steel leg 2 and the upper prefabricated reinforced concrete wall 1 as a whole through the corresponding connecting through holes 3.1, that is, the connecting bolt 4.2 passes through the corresponding connecting through hole 3.1 and is connected to the connecting screw hole through a thread, and the connecting bolt 4.2 is locked, so that the upper end of the lower steel leg 2 is fixed to the lower end surface of the upper prefabricated reinforced concrete wall 1. In this way, the lower steel leg 2 can be conveniently and reliably connected to the upper prefabricated reinforced concrete wall 1 through the embedded bolt assembly 4.

[0035] The combined prefabricated ground wall monomer of this embodiment is designed to meet the requirements of the bending strength of the upper part of the underground retaining structure and the small force on the lower part. The upper wall is set as an upper prefabricated reinforced concrete wall 1 to meet the bending strength requirements of the retaining structure; the lower wall is set as a lower steel leg 2 made of steel. On the one hand, the rigidity of the lower steel leg 2 can meet the requirements. On the other hand, the cross-sectional area of ​​the lower steel leg 2 made of steel is small, and the amount of soil extruded and replaced by piles is small, so it can effectively improve the problem of large soil extrusion and replacement of soil in the prefabricated reinforced concrete wall pile insertion, which makes it difficult to sink the wall. At the same time, it can effectively solve the problem of the need to dilute the mud concentration in order to smoothly insert piles, which affects the wall protection effect, and is conducive to the realization of micro-disturbance construction.

[0036] In addition, during transportation, the upper prefabricated reinforced concrete wall 1 and the lower steel legs 2 can be disassembled for easy transportation. Before inserting the piles, the upper end of the lower steel legs 2 is connected to the lower end of the upper prefabricated reinforced concrete wall 1 through the embedded bolt assembly 4. Since the lower part of the combined prefabricated ground wall unit of this embodiment is composed of the lower steel legs 2, the lower steel legs 2 are lighter than the reinforced concrete wall, so it is also convenient to hoist the whole unit and realize rapid construction.

[0037] In this embodiment, Figure 2 As shown, the lower steel leg 2 is made of H-shaped steel. In this way, the rigidity and bending strength requirements of the lower steel leg 2 can be guaranteed; and the amount of soil extruded and replaced by the H-shaped steel is small, which can effectively solve the problem that the prefabricated reinforced concrete wall has a large amount of soil extruded and replaced, and there is difficulty in sinking the wall. Of course, it should be noted that the lower steel leg 2 can also be made of existing steel sections such as I-beams, square steels, and round steel pipes.

[0038] In one implementation of this embodiment, Figure 2 As shown, there is only one H-shaped steel constituting the lower steel leg 2.

[0039] In another implementation of this embodiment, Figure 3 As shown, there are two H-shaped steels constituting the lower steel leg 2 , the two H-shaped steels are arranged side by side, and the two H-shaped steels share a connecting end plate 3 .

[0040] In this embodiment, Figure 2 As shown, the cross section of the upper prefabricated reinforced concrete wall 1 is in an I-shape. Of course, it should be noted that the cross section of the upper prefabricated reinforced concrete wall 1 can also be set to a rectangular shape or other special-shaped structures as required.

[0041] Further, each embedded bolt assembly 4 is distributed in two rows, and each row of embedded bolt assembly 4 includes at least two embedded bolt assemblies 4. In this way, the connection reliability between the lower steel support leg 2 and the upper prefabricated reinforced concrete wall 1 can be ensured.

[0042] Further, the connecting end plate 3 is welded to the lower section steel leg 2. In this way, the connection and production of the connecting end plate 3 and the lower section steel leg 2 are facilitated, and the connection strength and stability of the connecting end plate 3 and the lower section steel leg 2 are ensured.

[0043] Furthermore, the inner hole of the embedded sleeve 4.1 is a threaded hole, which constitutes the connecting screw hole, so as to facilitate the actual processing and manufacturing of the embedded sleeve 4.1.

[0044] In one implementation of this embodiment, the embedded steel bar 4.0 is extended upward and downward, and the lower end of the embedded steel bar 4.0 and the lower end of the embedded sleeve 4.1 extend into the embedded sleeve 4.1, and the embedded steel bar 4.0 and the inner hole of the embedded sleeve 4.1 are connected by threads. In this way, the connection between the embedded steel bar 4.0 and the embedded sleeve 4.1 is convenient, and the connection between the embedded steel bar 4.0 and the embedded sleeve 4.1 is stable.

[0045] In another implementation of this embodiment, the embedded steel bar 4.0 is extended upward and downward, and the lower end of the embedded sleeve 4.1 at the lower end of the embedded steel bar 4.0 extends into the embedded sleeve 4.1, and the embedded steel bar 4.0 and the embedded sleeve 4.1 are connected by welding. In this way, the connection between the embedded steel bar 4.0 and the embedded sleeve 4.1 is convenient, and the connection between the embedded steel bar 4.0 and the embedded sleeve 4.1 is stable.

[0046] In the third implementation of this embodiment, the embedded steel bar 4.0 is distributed in an upward and downward extension, the lower end of the embedded steel bar 4.0 and the lower end of the embedded sleeve 4.1 extend into the embedded sleeve 4.1, the embedded steel bar 4.0 and the inner hole of the embedded sleeve 4.1 are connected by threads, and the embedded steel bar 4.0 and the embedded sleeve 4.1 are connected by welding. In this way, the connection between the embedded steel bar 4.0 and the embedded sleeve 4.1 is convenient, and the connection between the embedded steel bar 4.0 and the embedded sleeve 4.1 is stable.

[0047] Specific embodiment 2, as Figure 1 , Figure 2 As shown, a combined prefabricated ground wall unit includes an upper prefabricated reinforced concrete wall 1, a lower steel support leg 2 and a plurality of embedded bolt assemblies 4.

[0048] The lower steel support legs 2 are located below the upper prefabricated reinforced concrete wall 1, and the lower steel support legs 2 are extended upward and downward.

[0049] The embedded bolt assembly 4 is embedded in the lower end of the upper prefabricated reinforced concrete wall 1. In this embodiment, the embedded bolt assembly 4 includes an embedded screw rod and a connecting nut (not shown in the figure) that cooperates with the embedded screw rod. The embedded screw rod is embedded in the lower end of the upper prefabricated reinforced concrete wall 1, and the embedded screw rod extends up and down. The lower end of the embedded screw rod extends to the bottom of the prefabricated reinforced concrete wall, and the connecting nut is located below the prefabricated reinforced concrete wall.

[0050] The upper end of the lower steel leg 2 is detachably connected to the lower end of the upper prefabricated reinforced concrete wall 1 through the embedded bolt assembly 4. Specifically, the upper end of the lower steel leg 2 is provided with a connecting end plate 3, and the connecting end plate 3 is provided with a plurality of connecting through holes 3.1 corresponding to the embedded bolt assembly 4. The embedded bolt assembly 4 connects the lower steel leg 2 and the upper prefabricated reinforced concrete wall 1 as a whole through the corresponding connecting through holes 3.1, that is, the embedded screw rod passes through the corresponding connecting through hole 3.1, and the connecting nut cooperates with the embedded screw rod located below the connecting end plate 3, and then the connecting nut is locked, so that the upper end of the lower steel leg 2 is fixed to the lower end surface of the upper prefabricated reinforced concrete wall 1. In this way, the lower steel leg 2 can be conveniently and reliably connected to the upper prefabricated reinforced concrete wall 1 through the embedded bolt assembly 4.

[0051] The combined prefabricated ground wall monomer of this embodiment is designed to meet the requirements of the bending strength of the upper part of the underground retaining structure and the small force on the lower part. The upper wall is set as an upper prefabricated reinforced concrete wall 1 to meet the bending strength requirements of the retaining structure; the lower wall is set as a lower steel leg 2 made of steel. On the one hand, the rigidity of the lower steel leg 2 can meet the requirements. On the other hand, the cross-sectional area of ​​the lower steel leg 2 made of steel is small, and the amount of soil extruded and replaced by piles is small, so it can effectively improve the problem of large soil extrusion and replacement of soil in the prefabricated reinforced concrete wall pile insertion, which makes it difficult to sink the wall. At the same time, it can effectively solve the problem of the need to dilute the mud concentration in order to smoothly insert piles, which affects the wall protection effect, and is conducive to the realization of micro-disturbance construction.

[0052] In addition, during transportation, the upper prefabricated reinforced concrete wall 1 and the lower steel legs 2 can be disassembled for easy transportation. Before inserting the piles, the upper end of the lower steel legs 2 is connected to the lower end of the upper prefabricated reinforced concrete wall 1 through the embedded bolt assembly 4. Since the lower part of the combined prefabricated ground wall unit of this embodiment is composed of the lower steel legs 2, the lower steel legs 2 are lighter than the reinforced concrete wall, so it is also convenient to hoist the whole unit and realize rapid construction.

[0053] In this embodiment, Figure 2As shown, the lower steel leg 2 is made of H-shaped steel. In this way, the rigidity and bending strength requirements of the lower steel leg 2 can be guaranteed; and the amount of soil extruded and replaced by the H-shaped steel is small, which can effectively solve the problem that the prefabricated reinforced concrete wall has a large amount of soil extruded and replaced, and there is difficulty in sinking the wall. Of course, it should be noted that the lower steel leg 2 can also be made of existing steel sections such as I-beams, square steels, and round steel pipes.

[0054] In one implementation of this embodiment, Figure 2 As shown, there is only one H-shaped steel constituting the lower steel leg 2.

[0055] In another implementation of this embodiment, Figure 3 As shown, there are two H-shaped steels constituting the lower steel leg 2 , the two H-shaped steels are arranged side by side, and the two H-shaped steels share a connecting end plate 3 .

[0056] In this embodiment, Figure 2 As shown, the cross section of the upper prefabricated reinforced concrete wall 1 is in an I-shape. Of course, it should be noted that the cross section of the upper prefabricated reinforced concrete wall 1 can also be set to a rectangular shape or other special-shaped structures as required.

[0057] Further, each embedded bolt assembly 4 is distributed in two rows, and each row of embedded bolt assembly 4 includes at least two embedded bolt assemblies 4. In this way, the connection reliability between the lower steel support leg 2 and the upper prefabricated reinforced concrete wall 1 can be ensured.

[0058] Further, the connecting end plate 3 is welded to the lower section steel leg 2. In this way, the connection and production of the connecting end plate 3 and the lower section steel leg 2 are facilitated, and the connection strength and stability of the connecting end plate 3 and the lower section steel leg 2 are ensured.

[0059] 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 combined prefabricated floor-wall unit, characterized in that: include: The upper part is prefabricated reinforced concrete wall; The lower steel legs are located below the upper prefabricated reinforced concrete wall and extend upward and downward; If an embedded bolt assembly is provided, it is embedded in the lower end of the upper prefabricated reinforced concrete wall, and the upper end of the lower steel support leg is detachably connected to the lower end of the upper prefabricated reinforced concrete wall through the embedded bolt assembly.

2. The combined prefabricated floor wall unit according to claim 1 is characterized in that: The embedded bolt assembly comprises: Embedded steel bars are embedded in the lower end of the upper prefabricated reinforced concrete wall; The embedded sleeve is embedded in the lower end of the upper prefabricated reinforced concrete wall, the embedded steel bar is connected with the embedded sleeve as a whole, the embedded sleeve is provided with a connecting screw hole with an opening facing downward, and the lower end of the connecting screw hole is connected with the lower end surface of the upper prefabricated reinforced concrete wall; Connecting bolts are connected with connecting screw holes.

3. The combined prefabricated floor wall unit according to claim 2 is characterized in that: The inner hole of the embedded sleeve is a threaded hole, and the threaded hole constitutes the connecting screw hole.

4. The combined prefabricated floor wall unit according to claim 2 or 3, characterized in that: The embedded steel bars are distributed in an upward and downward extending manner, the lower end of the embedded steel bars and the lower port of the embedded sleeve extend into the embedded sleeve, and the embedded steel bars are connected to the embedded sleeve by threads and / or welding.

5. The combined prefabricated floor wall unit according to claim 1 is characterized in that: The embedded bolt assembly includes an embedded screw rod and a connecting nut matched with the embedded screw rod. The embedded screw rod is embedded in the lower end of the upper prefabricated reinforced concrete wall, and the connecting nut is located below the prefabricated reinforced concrete wall.

6. The combined prefabricated floor wall unit according to claim 1, 2, 3 or 5, characterized in that: The upper end of the lower steel support leg is provided with a connecting end plate, and the connecting end plate is provided with a plurality of connecting through holes corresponding to the embedded bolt assemblies one by one. The embedded bolt assemblies connect the lower steel support leg with the upper prefabricated reinforced concrete wall as a whole through the corresponding connecting through holes.

7. The combined prefabricated floor wall unit according to claim 6 is characterized in that: The connecting end plate is connected to the lower steel support leg by welding.

8. The combined prefabricated floor wall unit according to claim 1, 2, 3 or 5, characterized in that: The embedded bolt assemblies are distributed in two rows, and each row of embedded bolt assemblies includes at least two embedded bolt assemblies.

9. The combined prefabricated floor wall unit according to claim 1, 2, 3 or 5, characterized in that: The lower steel legs are made of H-shaped steel.

10. The combined prefabricated floor wall unit according to claim 1, 2, 3 or 5, characterized in that: The cross section of the upper prefabricated reinforced concrete wall is in an I-shape.

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