PVC formwork for foam light soil roadbed backfill

Abstract

The utility model discloses a PVC template for foamed light soil roadbed backfilling, multiple first board spare, first board spare one side is equipped with second board spare, and is equipped with connecting piece between first board spare and second board spare. The utility model realizes the setting through multiple first board spare, second board spare and connecting piece, carries out the grid division to the construction area according to 400 m2 as a standard pouring unit, and the fine pouring of later period is convenient, simultaneously, the template is not removed after foamed light soil hardening, and its frame structure can be used as the rigid skeleton, makes the foamed light soil of backfilling area better form a whole, and improves the compressive strength.

Description

Technical Field

[0001] This utility model relates to the field of foamed lightweight soil roadbed backfilling technology, specifically to PVC templates used for foamed lightweight soil roadbed backfilling. Background Technology

[0002] Foamed cement lightweight soil (also known as aerated mixed lightweight soil) is a lightweight thermal insulation material containing a large number of closed pores, formed by mechanically foaming a foaming agent and uniformly mixing it with cement slurry, followed by natural curing. Due to its low cost, fast construction, good water resistance and durability, and good compressive strength, foamed lightweight soil is often used as roadbed filler in municipal engineering and is mostly used for backfilling behind bridge abutments.

[0003] In actual cast-in-place construction, due to the high fluidity of foamed lightweight soil, it is difficult to control the amount of pouring in a single pouring zone during conventional large-area pouring, which affects the construction quality. At the same time, after the foamed lightweight soil is formed, its compressive strength is low because it lacks a strong skeleton structure inside. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a PVC formwork for backfilling foamed lightweight soil subgrade. By setting multiple first plates, second plates and connectors, the construction area is divided into grids according to a standard pouring unit of 400 m², which facilitates precise pouring in the later stage. At the same time, the formwork is not removed after the foamed lightweight soil hardens, and its frame structure can serve as a stiffening skeleton, so that the foamed lightweight soil in the backfill area can better form a whole and improve the compressive strength.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a PVC formwork for backfilling foamed lightweight soil subgrade, comprising: Multiple first plates are provided, and a second plate is provided on one side of each first plate. A connecting member is provided between the first plate and the second plate.

[0006] Furthermore, the first plate is perpendicular to the second plate and is connected by a connector, and the two first plates and the two second plates form a rectangular structure.

[0007] Furthermore, the connectors include: a two-way connector, a three-way connector A, a three-way connector B, and a four-way connector. Each two-way connector has a connecting protrusion and a connecting recess connected to its side, and the connecting recess has a groove that matches the connecting protrusion.

[0008] Furthermore, the outer sides of the tee connector A and the tee connector B are connected with a connecting protrusion and two connecting recesses, and the two connecting recesses on the tee connector A are symmetrically arranged, while the two connecting recesses on the tee connector A are perpendicular to each other.

[0009] Furthermore, the four-way connector has connecting recesses on all four sides.

[0010] Furthermore, the first plate and the second plate are respectively connected to plug-in blocks and plug-in blocks at both ends, and both the first plate and the second plate are made of PVC.

[0011] Furthermore, the outer frame plates of the first and second plates are 3mm thick, and the first and second plates are provided with stiffening plates inclined at 45° inside, the stiffening plates being 1.5mm thick.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting up multiple first plates, second plates, and connectors, the construction area is divided into grids according to a standard pouring unit of 400 m², which facilitates precise pouring in the later stage. At the same time, the formwork is not removed after the foamed lightweight soil hardens, and its frame structure can serve as a stiffening skeleton, so that the foamed lightweight soil in the backfill area can better form a whole and improve the compressive strength. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is an exploded view of the overall structure of this utility model.

[0015] Figure 3 This is a cross-sectional view of the overall structure of this utility model.

[0016] Figure 4 This is a front view of the first connecting plate of this utility model.

[0017] Figure 5 This is a schematic diagram of the connecting component structure of this utility model.

[0018] Figure 6 For utility model Figure 3 Enlarged view of point A in the image.

[0019] In the diagram: 1. First plate; 2. Second plate; 3. Two-way connector; 301. Three-way connector A; 302. Three-way connector B; 303. Four-way connector; 4. Connecting protrusion; 401. Connecting recess; 5. Insertion block; 501. Insertion block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] This application provides a PVC formwork for backfilling foamed lightweight soil subgrade, which solves the problems of high fluidity of foamed lightweight soil making it difficult to control the pouring volume, lack of skeleton structure, and low compressive strength in existing subgrade backfilling.

[0022] By setting up multiple first plates 1, second plates 2 and connecting parts, the construction area is divided into grids according to a standard pouring unit of 400 m², which facilitates fine pouring in the later stage; at the same time, the formwork is not removed after the foamed lightweight soil hardens, and its frame structure can serve as a stiffening skeleton, so that the foamed lightweight soil in the backfill area can better form a whole and improve the compressive strength.

[0023] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0024] Reference Figure 1 , Figure 2 and Figure 3 As shown, a PVC template for backfilling foamed lightweight soil subgrade includes: multiple first plates 1, a second plate 2 on one side of the first plate 1, a connector between the first plate 1 and the second plate 2, the first plate 1 being perpendicular to the second plate 2 and connected by the connector, and two first plates 1 and two second plates 2 forming a rectangular structure.

[0025] Among them, the first plate 1 and the second plate 2 are both 5100mm long, 60mm wide, and the height can be customized. The proposed height in this scheme is 9600mm. The plates are equipped with a scale line of 600mm to control the thickness of a single pour. During construction, the roadbed area is divided into several rectangular casting units of 400 m² or less according to the design. Then, the first plate 1 and the second plate 2 are arranged around each unit and connected at the four corners by connectors to form a closed rectangular frame. Different connectors are used to splice the units until the entire roadbed area is covered by the formwork. Then, foamed lightweight soil is pumped into the area enclosed by the formwork, with each layer controlled at 0.5–0.8 m. The casting thickness can be controlled according to the height scale of the plate. After casting, there is no need to remove the formwork. The PVC formwork is embedded in the foamed lightweight soil as a permanent skeleton to improve the integrity and compressive strength.

[0026] Reference Figure 5 As shown, the connectors include: a two-way connector 3, a three-way connector A301, a three-way connector B302, and a four-way connector 303. The two-way connector 3 has a connecting protrusion 4 and a connecting recess 401 connected to its side. The three-way connector A301 and the three-way connector B302 have a connecting protrusion 4 and two connecting recesses 401 connected to their outer sides. The two connecting recesses 401 on the three-way connector A301 are symmetrically arranged and perpendicular to each other. The four-way connector 303 has connecting recesses 401 connected to all four sides, and the connecting recesses 401 have grooves that fit the connecting protrusion 4.

[0027] Among them, the two-way connector 3 is suitable for connecting the first plate 1 and the second plate 2 in the vertical area, while the three-way connector A301 and the three-way connector B302 are suitable for use in T-shaped intersections, and the four-way connector 303 is suitable for cross intersections.

[0028] Reference Figure 6 As shown, the first plate 1 and the second plate 2 are respectively connected to the two ends of the plug block 5 and the plug block 501. The plug block 5 is provided with a slot that matches the plug block 501 and the connecting protrusion 4. The first plate 1 and the second plate 2 are both made of PVC. The outer frame plate of the first plate 1 and the second plate 2 is 3mm thick. The first plate 1 and the second plate 2 are provided with a stiffening plate that is inclined at 45° inside. The stiffening plate is 1.5mm thick.

[0029] Among them, the insert block 501 and the connecting protrusion 4 are protruding tenons, and the groove on the connecting concave block 401 and the slot on the insert block 5 are recessed mortises, so that two adjacent first plates 1 can be connected by mortise and tenon through the insert block 5 and the insert block 501. The connection between two second plates 2 is the same, realizing the extension of length and ensuring the continuity and sealing of the plates in the straight direction. The connection between the first plate 1 and the second plate 2 and the connector is also made using a mortise and tenon structure, that is, the insert 501 can be mortised and tenoned with the connecting concave block 401, and the connecting protrusion 4 can be mortised and tenoned with the insert block 5.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A PVC formwork for backfilling foamed lightweight soil subgrade, characterized in that, include: Multiple first plates (1), a second plate (2) is provided on one side of the first plate (1), and a connecting member is provided between the first plate (1) and the second plate (2); The connectors include: a two-way connector (3), a three-way connector A (301), a three-way connector B (302), and a four-way connector (303). The two-way connector (3) has a connecting protrusion (4) and a connecting recess (401) connected to its side, and the connecting recess (401) has a groove that matches the connecting protrusion (4).

2. The PVC formwork for backfilling foamed lightweight soil subgrade according to claim 1, characterized in that, The first plate (1) is perpendicular to the second plate (2) and is connected by a connector. The two first plates (1) and the two second plates (2) form a rectangular structure.

3. The PVC formwork for backfilling foamed lightweight soil subgrade according to claim 1, characterized in that, The three-way connector A (301) and the three-way connector B (302) are connected to a connecting protrusion (4) and two connecting recesses (401) on the outside. The two connecting recesses (401) on the three-way connector A (301) are symmetrically arranged, and the two connecting recesses (401) on the three-way connector A (301) are perpendicular to each other.

4. The PVC formwork for backfilling foamed lightweight soil subgrade according to claim 1, characterized in that, The four-way connector (303) has connecting recesses (401) on all four sides.

5. The PVC formwork for backfilling foamed lightweight soil subgrade according to claim 1, characterized in that, The first plate (1) and the second plate (2) are respectively connected to the two ends of the plug block (5) and the plug block (501). The first plate (1) and the second plate (2) are both made of PVC.

6. The PVC formwork for backfilling foamed lightweight soil subgrade according to claim 1, characterized in that, The outer frame plate of the first plate (1) and the second plate (2) is 3mm thick. The first plate (1) and the second plate (2) are provided with stiffening plates that are inclined at 45° inside. The stiffening plates are 1.5mm thick.

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