EPS roadbed filling block anti-floating structure pre-buried in cement mixing pile

Abstract

The utility model relates to an EPS (Expandable Polystyrene) roadbed filling block anti-floating structure pre-buried in a cement mixing pile, which comprises a cement cushion layer and a plurality of layers of EPS filling blocks paved on the cement cushion layer, and a plurality of pre-buried twisted steel bars are vertically arranged on the cement cushion layer. The EPS filling blocks are square, reserved grooves embedded with the pre-embedded twisted steel bars are vertically formed in the four corners and the middles of the front side ends and the rear side ends of the EPS filling blocks, claw-shaped connecting pieces are arranged between the EPS filling blocks stacked up and down so that the EPS filling blocks can be inserted into the claw-shaped connecting pieces to connect or fix the EPS filling blocks, and through holes allowing the pre-embedded twisted steel bars to penetrate through are formed in the claw-shaped connecting pieces. The EPS filling block with the preformed groove is anchored on the cement mixing pile through the pre-embedded twisted steel pre-embedded in the foundation reinforcing cement mixing pile, the anti-floating performance of the EPS filling block is improved, the stability of a roadbed is ensured, and compared with a traditional mode that an anchor rod is driven later for fixation, the EPS filling block is more economical and stable.

Description

Technical Field

[0001] The utility model relates to an EPS roadbed filling block anti-floating structure pre-buried in a cement mixing pile. Background Art

[0002] When filling and paving the ground above the subway tunnel in the soft foundation section, the huge load brought by the filling may cause the soft foundation in the area to settle, thereby causing the subway tunnel to deform and affect the safety of subway operation. Therefore, it is particularly important to control the settlement of the soft foundation above the subway tunnel.

[0003] At present, the method to deal with the settlement of the soft foundation section above the tunnel is to use EPS fill blocks instead of earth and stone backfill. In order to prevent the EPS lightweight fill blocks from being damaged by the buoyancy of groundwater and causing damage to the road structure, the traditional technical means is to use the method of anchoring from top to bottom to fix the EPS fill blocks to the foundation reinforcement part below. This method is very helpful in preventing the EPS fill blocks from floating up, but there are also problems such as low durability, high material consumption, and difficulty in ensuring construction quality. Utility Model Content

[0004] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide an EPS roadbed filling block anti-floating structure pre-buried in a cement mixing pile, which is not only structurally reasonable but also has low economic cost and stable quality.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: an EPS roadbed filling block anti-floating structure pre-embedded in a cement mixing pile, comprising a cement cushion layer and several layers of EPS filling blocks laid on the cement cushion layer, a number of pre-embedded threaded steel bars are vertically arranged on the cement cushion layer, the EPS filling block is square in shape, and four corners and the middle of the front and rear sides are vertically provided with reserved grooves for engaging with the pre-embedded threaded steel bars, claw-type connectors are provided between the stacked EPS filling blocks to insert the EPS filling blocks to connect or fix the EPS filling blocks, and the claw-type connectors are provided with through holes for the pre-embedded threaded steel bars to pass through.

[0006] Furthermore, the EPS filling blocks are divided into odd-numbered EPS filling blocks and even-numbered EPS filling blocks by the number of layers stacked from bottom to top. The odd-numbered EPS filling blocks and the even-numbered EPS filling blocks are staggered up and down, and the embedded threaded steel bars engaged with the reserved grooves at the four corners of the odd-numbered EPS filling blocks are engaged with the reserved grooves in the middle of the front and rear side ends of the upper even-numbered EPS filling blocks.

[0007] Furthermore, the reserved grooves at the four corners of the EPS filling block are in the shape of a quarter arc, that is, the four corners of the plane of the factory-prefabricated EPS filling block have groove sections with a cross-section of 1 / 4 pre-embedded threaded steel bars, and the reserved grooves located in the middle of the front and rear ends of the EPS filling block are in the shape of a semi-circular arc, that is, the two long sides have groove sections with a cross-section of 1 / 2 pre-embedded threaded steel bars.

[0008] Furthermore, the claw-type connector includes a double-sided claw-type connector, a single-sided claw-type connector and a corner claw-type fastener. The double-sided claw-type connector is provided with a plurality of groups of serrated claw buckles protruding up and down along its edge, the single-sided claw-type connector is provided with a plurality of groups of serrated claw buckles protruding in the same direction along its edge, and the corner claw-type fastener is L-shaped and has serrated claw buckles protruding in the same direction at both end edges.

[0009] Furthermore, the double-sided claw-type connector and the single-sided claw-type connector are both cross-shaped, and their through holes are both located at the center and are welded and fixed after the embedded threaded steel bars pass through the through holes. The through holes on the corner claw-type fasteners are located at their vertical bends, and the corner claw-type fasteners are welded and fixed after the embedded threaded steel bars pass through the through holes.

[0010] Furthermore, the double-sided claw-type connectors are wedged and connected between the upper and lower EPS filling blocks through the upper and lower protruding serrated claw buckles, the single-sided claw-type connectors are on the upper surface of the top EPS filling block and are wedged into the adjacent EPS filling blocks through the single-sided protruding serrated claw buckles to connect and fix them, and the corner claw-type fasteners are located above the corners of the EPS filling blocks at the edges and are welded and fixed to them through the embedded threaded steel bars.

[0011] Furthermore, a cement mixing pile for support is cast at the lower end of the cement cushion layer, and the lower ends of the embedded threaded steel bars are inserted and fixed in the cement mixing pile.

[0012] Furthermore, a reinforced concrete slab is laid and poured on the EPS filling blocks at the top layer, and clay is filled between the reinforced concrete slab and the cement cushion layer outside the EPS filling blocks.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] (1) Good structural durability and pull-out resistance. During the construction of foundation reinforcement cement mixing piles, a threaded steel bar is embedded in them. After the cement mixing pile solidifies, the embedded threaded steel bar is used as an anchor rod to fix the EPS filler block. Compared with traditional post-driving anchor rods, the overall structural durability and pull-out resistance of the embedded threaded steel bar are higher.

[0015] (2) High construction efficiency and low economic cost. In the manufacturing process of the EPS filler block of this technology, a groove for embedding the pre-embedded threaded steel bar is reserved. During the on-site construction, it is only necessary to splice the EPS filler block and the pre-embedded threaded steel bar together, which can speed up the construction efficiency. The EPS filler block is fixed with pre-embedded threaded steel bars and claw-type connectors. Compared with the traditional post-anchor bolts, the length of the material can be effectively reduced, thereby achieving the purpose of saving materials. The construction of pre-embedded threaded steel bars is simple, eliminating the mechanical equipment required for post-anchor bolts, greatly saving manpower and material resources, thereby reducing costs.

[0016] (3) Stable project quality. The construction process of the embedded threaded steel bars at the anchorage is visible, which makes it easy for construction personnel to intuitively understand the quality of the construction and judge whether to make adjustments, providing an important guarantee for the construction quality. Each EPS filler block has six reserved slots for embedding the embedded threaded steel bars. During the construction process, not all reserved slots are used. The unused reserved slots can be used as water holes to enhance the water permeability of the replacement area and ensure the overall stability of the EPS filler block.

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the EPS filler block in the embodiment of the utility model;

[0020] Figure 3 It is a top view of the EPS filling block in the embodiment of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of a double-sided claw-type connector in an embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of a single-sided claw-type connector in an embodiment of the utility model;

[0023] Figure 6 It is a schematic diagram of the structure of the corner claw-type fastener in the embodiment of the utility model;

[0024] Figure 7 It is a schematic diagram of the installation of the EPS filling block in the embodiment of the utility model.

[0025] In the figure: 1-cement cushion layer, 2-EPS filling block, 3-embedded threaded steel bar, 4-reserved groove, 5-claw type connector, 6-through hole, 7-odd-numbered EPS filling block, 8-even-numbered EPS filling block, 9-double-sided claw type connector, 10-single-sided claw type connector, 11-corner claw fastener, 12-serrated claw buckle, 13-cement mixing pile, 14-reinforced concrete slab, 15-clay soil. DETAILED DESCRIPTION

[0026] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0027] like Figures 1 to 7As shown, an EPS roadbed anti-floating structure pre-buried in a cement mixing pile provides pull-out resistance for replacing EPS filling blocks in the roadbed by pre-buried threaded steel bars in the cement mixing pile, thereby avoiding cracking and deformation of the road surface. It includes a cement cushion layer 1 and several layers of EPS filling blocks 2 laid on the cement cushion layer, and several pre-buried threaded steel bars 3 are vertically inserted on the cement cushion layer. The EPS filling blocks are all square in shape, and the four corners and the middle of the front and rear sides are vertically provided with reserved grooves 4 for embedding with the pre-buried threaded steel bars. Claw-type connectors 5 are provided between the stacked EPS filling blocks to insert the EPS filling blocks so as to connect or fix each EPS filling block, and the claw-type connectors are provided with through holes 6 for the pre-buried threaded steel bars to pass through.

[0028] In an embodiment of the utility model, the EPS filling blocks are divided into odd-numbered EPS filling blocks 7 and even-numbered EPS filling blocks 8 according to the number of layers stacked from bottom to top. The odd-numbered EPS filling blocks and the even-numbered EPS filling blocks are staggered up and down, and the embedded threaded steel bars engaged with the reserved grooves at the four corners of the odd-numbered EPS filling blocks are engaged with the reserved grooves in the middle of the front and rear ends of the upper even-numbered EPS filling blocks.

[0029] In an embodiment of the utility model, the reserved grooves at the four corners of the EPS filling block are in the shape of a quarter arc, that is, the four corners of the plane of the factory-prefabricated EPS filling block have groove sections with a cross-section of 1 / 4 pre-embedded threaded steel bars, and the reserved grooves located in the middle of the front and rear ends of the EPS filling block are in the shape of a semi-circular arc, that is, the two long sides have groove sections with a cross-section of 1 / 2 pre-embedded threaded steel bars.

[0030] In an embodiment of the utility model, the claw-type connector includes a double-sided claw-type connector 9, a single-sided claw-type connector 10 and a corner claw-type fastener 11. The double-sided claw-type connector is provided with a plurality of groups of serrated claw buckles 12 protruding from top to bottom along its edge, the single-sided claw-type connector is provided with a plurality of groups of serrated claw buckles protruding in the same direction along its edge, and the corner claw-type fastener is L-shaped and both ends of the edge are provided with serrated claw buckles protruding in the same direction.

[0031] In the embodiment of the utility model, the double-sided claw-type connector is a steel sheet with serrated claw buckles on both sides, and the geometric center of the steel sheet is opened to be embedded in the embedded threaded steel bar to connect the upper and lower layers and the surrounding EPS filling blocks. The single-sided claw-type connector is a steel sheet with a serrated claw buckle on one side, and the geometric center of the steel sheet is opened to be embedded in the embedded threaded steel bar to connect the EPS filling blocks around the layer. The corner claw-type fastener is a steel sheet with a serrated claw buckle on one side, and the corner of the steel sheet is opened to be embedded in the embedded threaded steel bar to fix the EPS filling blocks in the reserved grooves at the edges of each layer.

[0032] In the embodiment of the utility model, the double-sided claw-type connector and the single-sided claw-type connector are both cross-shaped, and their through holes are both located at the center and are welded and fixed after the embedded threaded steel bars pass through the through holes to limit the lower EPS filling blocks. The through holes on the corner claw-type fasteners are located at their vertical bends, and the corner claw-type fasteners are welded and fixed after the embedded threaded steel bars pass through the through holes.

[0033] In the embodiments of the utility model, the double-sided claw-type connectors are inserted and connected between the upper and lower EPS filling blocks through the upper and lower protruding serrated claw buckles. The single-sided claw-type connectors are inserted into the adjacent EPS filling blocks on the upper surface of the top EPS filling block through the single-sided protruding serrated claw buckles to connect and fix. The corner claw-type fasteners are located above the corners of the EPS filling blocks at the edges and are welded and fixed to them through the embedded threaded steel bars.

[0034] In the embodiment of the utility model, a plurality of cement mixing piles 13 for support are cast at the lower end of the cement cushion layer, and the lower ends of the embedded threaded steel bars are inserted and fixed in the cement mixing piles.

[0035] In the embodiment of the utility model, a reinforced concrete slab 14 is laid and cast on the EPS filling blocks at the top layer, and clay 15 is filled between the reinforced concrete slab and the cement cushion layer outside the EPS filling blocks.

[0036] The construction steps of the utility model embodiment are as follows:

[0037] (1) After the construction of the cement mixing pile is completed, before it solidifies, the lower part of the embedded threaded steel bar is embedded in it. The embedding depth is half of the length of the cement mixing pile. The reserved length is the total height of each layer of EPS filling block. The verticality of the embedded threaded steel bar is ensured by using vertical lead wire.

[0038] (2) When the EPS filling blocks are prefabricated in the factory, reserved grooves are reserved for the embedded threaded steel bars. Before installing the EPS filling blocks, the cement cushion layer is laid on the site. After the cement cushion layer reaches the specified hardness, the reserved groove EPS filling blocks are installed. The odd-numbered EPS filling blocks are embedded with the four surrounding embedded threaded steel bars through the reserved grooves at the four corners, and the even-numbered EPS filling blocks are embedded with the embedded threaded steel bars on both sides through the reserved grooves at the two sides.

[0039] (3) Install the reserved slot EPS filling blocks on site by stacking them from the bottom layer upwards. When one layer of EPS filling blocks (not the top layer) is installed, insert the double-sided claw-type connector into the embedded threaded steel bars, and insert the claw part (serrated claw buckle) of the connector into the reserved slot EPS filling block. The double-sided claw-type connector is welded to the embedded threaded steel bars to fix the EPS filling block.

[0040] (4) Use the corner claw-type fasteners to fix the EPS filler blocks at the edge of each layer. Insert the corner claw-type fasteners into the embedded threaded steel bars, and insert the claws of the fasteners (serrated claws) into the EPS filler blocks. The corner claw-type fasteners are welded to the embedded threaded steel bars to fix the EPS filler blocks.

[0041] (5) After the top EPS filler is installed, insert the single-sided claw-type connector into the embedded threaded steel bar, and insert the claw part (serrated claw buckle) of the single-sided claw-type connector into the EPS filler. The single-sided claw-type connector is welded to the embedded threaded steel bar to fix the EPS filler. All installation steps are completed.

[0042] The utility model is not limited to the above-mentioned best implementation mode. Anyone can derive other various forms of EPS roadbed anti-floating structures pre-buried in cement mixing piles under the inspiration of the utility model. All equivalent changes and modifications made according to the scope of the patent application of the utility model shall fall within the scope of the utility model.

Claims

1. An EPS roadbed block anti-floating structure pre-buried in a cement mixing pile, characterized by: It includes a cement cushion layer and several layers of EPS filling blocks laid on the cement cushion layer, wherein a plurality of pre-embedded threaded steel bars are vertically arranged on the cement cushion layer, and the EPS filling blocks are square in shape, and four corners and the middle of the front and rear sides are vertically provided with reserved grooves for engaging with the pre-embedded threaded steel bars, and claw-type connectors are arranged between the stacked EPS filling blocks to insert the EPS filling blocks to connect or fix the EPS filling blocks, and the claw-type connectors are provided with through holes for the pre-embedded threaded steel bars to pass through.

2. The EPS roadbed anti-floating structure pre-buried in a cement mixing pile according to claim 1 is characterized in that: The EPS filling blocks are divided into odd-numbered EPS filling blocks and even-numbered EPS filling blocks by the number of layers stacked from bottom to top. The odd-numbered EPS filling blocks and the even-numbered EPS filling blocks are staggered up and down, and the embedded threaded steel bars engaged with the reserved grooves at the four corners of the odd-numbered EPS filling blocks are engaged with the reserved grooves in the middle of the front and rear ends of the even-numbered EPS filling blocks above them.

3. The EPS roadbed anti-floating structure pre-buried in a cement mixing pile according to claim 1 is characterized in that: The reserved grooves at the four corners of the EPS filling block are in the shape of a quarter arc, and the reserved grooves at the middle of the front and rear ends of the EPS filling block are in the shape of a semi-circular arc.

4. The EPS roadbed anti-floating structure pre-buried in a cement mixing pile according to claim 1 is characterized in that: The claw-type connector includes a double-sided claw-type connector, a single-sided claw-type connector and a corner claw-type fastener. The double-sided claw-type connector is provided with a plurality of groups of serrated claw buckles protruding up and down along its edge, the single-sided claw-type connector is provided with a plurality of groups of serrated claw buckles protruding in the same direction along its edge, and the corner claw-type fastener is L-shaped and has serrated claw buckles protruding in the same direction at both ends of the edge.

5. The EPS roadbed anti-floating structure pre-buried in cement mixing piles according to claim 4 is characterized by: The double-sided claw-type connector and the single-sided claw-type connector are both cross-shaped, with their through holes located at the center and welded and fixed after the embedded threaded steel bars pass through the through holes. The through holes on the corner claw-type fasteners are located at their vertical bends, and the corner claw-type fasteners are welded and fixed after the embedded threaded steel bars pass through the through holes.

6. The EPS roadbed anti-floating structure pre-buried in a cement mixing pile according to claim 4 is characterized by: The double-sided claw-type connectors are wedged and connected between the upper and lower EPS filling blocks through the upper and lower protruding serrated claw buckles. The single-sided claw-type connectors are on the upper surface of the top EPS filling block and are wedged into the adjacent EPS filling blocks through the single-sided protruding serrated claw buckles to connect and fix. The corner claw-type fasteners are located above the corners of the EPS filling blocks at the edges and are welded and fixed to them through the embedded threaded steel bars.

7. The EPS roadbed anti-floating structure pre-buried in a cement mixing pile according to claim 1, characterized in that: A cement mixing pile for support is cast at the lower end of the cement cushion layer, and the lower ends of the embedded threaded steel bars are inserted and fixed in the cement mixing pile.

8. The EPS roadbed anti-floating structure pre-buried in a cement mixing pile according to claim 1, characterized in that: A reinforced concrete slab is laid and poured on the EPS filling blocks at the top layer, and clay is filled between the reinforced concrete slab and the cement cushion layer outside the EPS filling blocks.

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