Road base prefabricated side formwork backrest integrated construction method

Abstract

An integrated construction method for a road base prefabricated side formwork backrest comprises the following steps that S1, a side formwork and a backrest are prefabricated; s2, fixing side forms: determining elevations on the two sides of the road base, placing the side forms, enabling the baffle tables to be positioned on the outer side, then inserting positioning rods into the rod penetrating holes to fix the side forms, and exposing the upper parts of the positioning rods out of the side forms; s3, integrating the backrest and the side mold, sleeving the backrest sleeve from the upper part of the positioning rod, placing the backrest sleeve in the front area of the baffle table of the side mold, and knocking the positioning rod into the backrest; and S4, curbs are placed, specifically, the curbs are placed in the front area of the backrest above the side molds, and the asphalt pavement is constructed. The mode that the tenons and the grooves are connected in an inserted mode is adopted, the installation straightness and strength of the adjacent side molds are guaranteed, the positioning rods are assisted to vertically penetrate through the side molds to be inserted into the ground, transverse and longitudinal stability of the side molds is achieved, and the backrest and the side molds are formed in a non-integrated mode; and the problem that the curb is irregular after being mounted due to error accumulation can be solved by adjusting the position of the backrest.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road engineering construction, in particular to a road base prefabricated side mold backrest integrated construction method. BACKGROUND

[0002] In traditional road engineering construction, road base side mold installation and curb backrest pouring are usually carried out in separate steps. This traditional construction method has many problems: first, multiple formwork needs to be erected and dismantled, the process is complex, and the construction efficiency is low; second, the stability of the temporary support side mold is poor, and displacement or deformation may occur during the paving and compaction of the base material, affecting the road alignment and flatness; the turnover utilization rate of traditional wood mold or steel mold is low, and the material is wasted seriously, which does not meet the requirements of modern construction energy saving and consumption reduction.

[0003] The prior art also has a prefabricated side mold for construction, for example, patent application No. CN201910713925.3, entitled curbstone prefabricated assembly side mold and its construction process, designs an L-shaped prefabricated assembly side mold, but when in use, only a layer of cement mortar for bonding is paved on the top of the light pipe concrete side mold or the road base side mold, and then the curbstone prefabricated assembly side mold product is paved, which cannot effectively fix the prefabricated assembly side mold with the road base, and displacement or deformation may still occur during the subsequent compaction process.

[0004] In addition, the curbstone is generally arranged vertically, and the road roller is easy to hit the curbstone when it is at the edge corner position, thereby causing displacement and affecting the paving effect of the curbstone.

[0005] When using prefabricated side mold backrest construction, the cumulative error problem cannot be ignored. On the one hand, there is a certain error in the installation position of the prefabricated side mold and backrest during on-site construction; on the other hand, the curbstone also has manufacturing errors, including size errors and front-back face non-parallel problems. Therefore, when using prefabricated side mold backrest construction, the cumulative error caused by the superposition of the two aspects makes the curbstone paving uneven, which is also a problem that needs attention. SUMMARY

[0006] To solve the technical problems in the background art, the present application provides a road base prefabricated side mold backrest integrated construction method.

[0007] The technical scheme of the present application is as follows: A road base prefabricated side mold backrest integrated construction method, comprising the following steps: S1, prefabricating a side mold and a backrest; The side mold is a rectangular structure with a protruding tenon structure at one end and a groove structure at the other end along the length direction. Integrated pipelines are arranged inside the side mold along the length direction. Several through holes are spaced apart on the side mold along the length direction. The through holes are arranged vertically and do not interfere with the integrated pipelines. A baffle protruding upward is provided on one side of the side mold along the length direction. The backrest has a rectangular structure with several adjustment holes spaced apart along its length. The center distance between adjacent adjustment holes is equal to the center distance between adjacent through holes. By using prefabricated side molds and backrests, construction time can be saved compared to on-site casting, eliminating the need for multiple formwork erections and dismantling, and simplifying the construction process.

[0008] S2, Fixed side mold; Determine the elevation on both sides of the road base, place the side formwork, so that the retaining platform is on the outside, and then insert the positioning rod into the through hole to fix the side formwork, with the upper part of the positioning rod protruding from the side formwork; The wires are passed through the integrated conduit of the side mold, and the protrusions and grooves of the adjacent side molds are inserted. S3. Integrate the backrest and side mold together; Slide the backrest cover over the top of the positioning rod and place it in the front area of ​​the side mold's baffle. Then tap the positioning rod into the backrest. S4. Place curb stones; Place the curbstone on the front back of the side formwork and construct the asphalt pavement.

[0009] This invention uses a tenon and groove insertion method to ensure the straightness and strength of adjacent side mold installation, and assists the positioning rod to vertically pass through the side mold and insert into the ground, thus achieving the lateral and longitudinal stability of the side mold.

[0010] The backrest and side mold are not integrally formed, but are separately constructed and installed on-site. This allows for adjustments to the backrest position to eliminate unevenness in the curb after installation caused by accumulated errors in the manufacturing of the backrest and curb.

[0011] Meanwhile, the positioning rod passes through the backrest and side mold in one piece, and the rear end of the side mold is equipped with an upward protruding baffle to support the backrest, which enhances the support effect of the backrest.

[0012] As a further improvement, in step S1, the upper end of the backrest facing the curb is tilted inward at an angle of α. In step S4, the curbstone is placed at an angle above the front back of the side mold.

[0013] This effectively prevents the road roller from hitting the curb and causing it to shift.

[0014] But after the curb is inclined, it is easier for the adjacent curbs to produce relative deflection, resulting in uneven arrangement of the curbs, as a preferred solution, in step S4, cement mortar is laid on the top of the side mold first, and then the curb is placed in an inclined manner. The adjacent curbs are aligned by adjusting the position of the curb relative to the precast side mold and backrest.

[0015] As another improvement, in step S1, the hole diameter is adjusted to be larger than the rod hole diameter, and the abutment and the adjacent surface of the backrest are both inclined surfaces with an inclination angle of α, so as to form a V-shaped gap therebetween. In step S4, the curb control line is installed, and after the curb is placed on the backrest, the positions of the two ends of the backrest are adjusted until the front top of the curb coincides with the control line, and at least two wedge-shaped blocks are inserted into the V-shaped gap between the backrest and the abutment. Cement mortar is poured into the adjusting hole and the V-shaped gap.

[0016] Through the special design of the backrest and the abutment, the adjusting space during installation of the curb is increased, which can effectively cope with the cumulative error caused by the curb manufacturing error and the backrest manufacturing error, and at the same time, the V-shaped gap is designed to eliminate the support problem of the backrest caused by the adjusting hole. Finally, by pouring cement mortar into the adjusting hole and the V-shaped gap, the backrest and the side mold are integrated together, and the support effect is improved.

[0017] Further, the wedge-shaped blocks have multiple specifications and are prefabricated in advance for on-site adaptation and use.

[0018] Further, the adjusting hole is not in the center of the backrest, but is arranged on the front side. The lower end of the curb of the present application is located above the side mold, the adjusting hole is arranged on the front side, the width of the side mold can be shortened, and materials can be saved.

[0019] Further, the height of the wedge-shaped block is less than the height of the abutment, and when used, it is completely inserted into the V-shaped gap, which is convenient for pouring cement mortar on the top.

[0020] Further, in step S1, the height of the backrest is greater than the height of the abutment.

[0021] As one of the embodiments, in step S1, the groove structure of the side mold includes two vertically arranged inner and outer side plates, the height of the inner side plate is the same as the front part of the side mold, the height of the rear side plate is the same as the height of the abutment, the width of the inner and outer side plates is the same, and the groove is formed between the two.

[0022] Preferably, the rod hole is located at the center line position of the length direction of the side mold, which is convenient for arranging the electric wire.

[0023] Through the above design, the present invention provides an integrated construction method for prefabricated side formwork backrests for road base courses. By using a tenon and groove insertion method, the straightness and strength of adjacent side formwork installation are ensured. The positioning rod is vertically inserted into the ground through the side formwork, thereby achieving the lateral and longitudinal stability of the side formwork.

[0024] The backrest and side mold are not integrally formed, but are separately constructed and installed on-site. This allows for adjustments to the backrest position to eliminate unevenness in the curb after installation caused by accumulated errors in the manufacturing of the backrest and curb.

[0025] Meanwhile, the positioning rod passes through the backrest and side mold in one piece, and the rear end of the side mold is equipped with an upward protruding baffle to support the backrest, which enhances the support effect of the backrest.

[0026] To further eliminate cumulative errors, the backrest and platform were specially designed to increase the adjustment space during curbstone installation. This effectively addresses cumulative errors caused by curbstone manufacturing errors and backrest manufacturing errors. In addition, a V-shaped gap design is used to eliminate backrest support problems caused by the opening of adjustment holes. Finally, by injecting cement mortar into the adjustment holes and V-shaped gaps, the backrest and side formwork are integrated together, improving the support effect. Attached Figure Description

[0027] In the attached diagram: Figure 1 This is a diagram illustrating the integrated construction effect of precast side formwork backrests for road base in Example 1. Figure 2 This is a diagram illustrating the integrated construction effect of precast side formwork backrests for road base in Example 2. Figure 3 for Figure 2 Top view; Figure 4 for Figure 2 A magnified view of the central X position; Figure 5 This is a schematic diagram of the wedge block structure; The components represented by the various reference numerals in the diagram are: 1. Side mold; 11. Tenon; 12. Groove; 121. Inner side plate; 122. Outer side plate; 13. Stand; 2. Backrest; 21. Adjustment hole; 3. Positioning rod; 4. Curbstone; 5. Integrated pipeline; 6. Wedge block; 7. Road base layer. Detailed Implementation

[0028] Example 1 See Figure 1 This embodiment provides an integrated construction method for precast side formwork backrests of road base courses, including the following steps: S1, prefabricated side mold 1 and backrest 2; The side mold 1 is a rectangular structure. One end is set as a protruding tenon 11 structure along the length direction, and the other end is set as a groove 12 structure. An integrated pipeline 5 is arranged inside the side mold 1 along the length direction. Several through holes are spaced apart on the side mold 1 along the length direction. The through holes are arranged vertically and do not interfere with the integrated pipeline 5. A baffle 13 protruding upward is provided on the rear side of the side mold along the length direction.

[0029] The groove 12 structure of the side mold 1 includes two vertically arranged inner side plates 121 and outer side plates 122. The inner side plate 121 is at the same height as the front part of the side mold, and the rear side plate is at the same height as the baffle 13. The inner side plate 121 and the outer side plate 122 are of the same width, and a groove 12 is formed between them.

[0030] The dimensions of the groove 12 match the dimensions of the tenon 11. The integrated pipeline 5 protrudes outward by a certain distance at the position of the groove 12. The tenon 11 has a corresponding recessed part to facilitate the insertion and alignment of the tenon 11 and the groove 12.

[0031] In this embodiment, the integrated pipeline 5 is divided into two columns and symmetrically arranged on both sides of the side mold 1, leaving the middle position to set the through hole and avoid interference between the two.

[0032] Preferably, the through hole is located at the centerline of the side mold 1 along its length, which facilitates the arrangement of the wire 5.

[0033] The backrest 2 is a rectangular structure with several adjustment holes 21 spaced apart along its length. The center distance between adjacent adjustment holes 21 is equal to the center distance between adjacent through holes.

[0034] The height of the backrest 2 is greater than the height of the curb 13, but less than the height of the curbstone 4.

[0035] By using prefabricated side formwork 1 and backrest 2, construction time can be saved compared to on-site casting, eliminating the need for multiple formwork erections and dismantling, and simplifying the construction process.

[0036] S2, Fixed side mold 1; Determine the elevation on both sides of the road base 7, place the side formwork 1, so that the retaining platform 13 is located on the outside, then insert the positioning rod 3 into the through hole and insert it into the roadbed to fix the side formwork 1, so that the upper surface of the adjacent side formwork 1 is flush, the upper part of the positioning rod 3 protrudes from the side formwork, and the protruding length is greater than the height of the backrest 2.

[0037] The wire 5 is passed through the integrated conduit 5 of the side mold 1, and the protrusion 11 of the adjacent side mold 1 is inserted into the groove 12.

[0038] S3. Integrate the backrest 2 and the side mold 1 together; Slide the backrest cover onto the upper part of the positioning rod 3 and place it in the front area of ​​the baffle 13 of the side mold 1. Then tap the positioning rod 3 into the backrest.

[0039] S4, Place 4 curb stones; Place the curbstone 4 above the side formwork 1 in the front area of ​​the backrest 2 and construct the asphalt pavement.

[0040] This invention employs a tenon 11 and a groove 12 for insertion, ensuring the straightness and strength of the adjacent side molds 1 during installation. The positioning rod 3 vertically passes through the side mold 1 and inserts into the ground, achieving lateral and longitudinal stability of the side mold 1. This prevents the side mold 1 from being squeezed out during compaction by the road roller.

[0041] The backrest 2 and the side mold 1 are not integrally formed, but are separately constructed and installed on site. This allows for the elimination of unevenness of the curbstone 4 after installation caused by the cumulative manufacturing errors of the backrest 2 and the curbstone 4 by adjusting the position of the backrest 2.

[0042] Meanwhile, the positioning rod 3 passes through the backrest 2 and the side mold 1 in one piece, and the rear end of the side mold 1 is provided with an upward protruding baffle 13 to support the backrest 2, thereby enhancing the support effect of the backrest 2.

[0043] Example 2 See Figures 2-5 In this embodiment, to address the issue of vertically positioned curb stones 4 being easily displaced by road rollers, the curb stones 4 are designed to be placed at an angle. However, simply placing the curb stones 4 at an angle, due to accumulated errors, results in a more irregular arrangement of the curb stones 4 compared to the traditional vertical arrangement. To simultaneously solve both problems, this embodiment makes the following improvements based on Embodiment 1: In step S1, the diameter of the adjustment hole 21 is larger than the diameter of the through hole. Since the adjacent side molds 1 have already achieved lateral and longitudinal positioning through positioning rods and plugs, the installation error of the adjacent curbstones 4 exists but will not be too large. Therefore, the adjustment hole 21 does not need to be set too large, but it should also be easy to pour cement mortar inward for fixing.

[0044] The upper part of the backrest 2 facing the curb 4 is tilted inward at an angle of α. The adjacent surfaces of the platform 13 and the backrest 2 are both tilted surfaces at an angle of α, forming a V-shaped gap between them.

[0045] The α angle does not need to be set too large; 2-3° is sufficient to allow the curbstone to avoid the road roller's operation.

[0046] In step S4, the curb control line is installed, cement mortar is laid on the top of the side formwork 1, and the curb 4 is placed at an angle in the front area of ​​the backrest 2 above the side formwork 1. After the curb 4 is placed on the backrest 2, the positions of the two ends of the backrest 2 are adjusted until the front top of the curb 4 coincides with the control line and the front surface is parallel to the front surface of the adjacent curb 4. At least two wedge blocks 6 are inserted into the V-shaped gap between the backrest 2 and the platform 13 to limit the position of the backrest 2.

[0047] Cement mortar is poured into the regulating hole 21 and the V-shaped gap.

[0048] Thus, the inclined rearward installation of the curbstone 4 effectively prevents the road roller from hitting the curbstone 4 and causing it to shift. The adjacent curbstones 4 can be aligned by adjusting the position of the curbstone 4 relative to the precast side mold 1 and the backrest.

[0049] Moreover, the special design of the backrest 2 and the platform 13 increases the adjustment space during the installation of the curbstone 4, which can effectively cope with the cumulative errors caused by the manufacturing errors of the curbstone 4 and the backrest. At the same time, the V-shaped gap design eliminates the backrest support problem caused by the opening of the adjustment hole 21. Finally, by pouring cement mortar into the adjustment hole 21 and the V-shaped gap, the backrest 2 and the side mold 1 are integrated together, improving the support effect.

[0050] See Figure 2 The adjustment hole 21 is not located in the center of the backrest, but is positioned towards the front. The lower end of the curbstone 4 of this invention is located above the side mold 1, and the adjustment hole 21 is positioned forward, which can shorten the width of the side mold 1 and save material.

[0051] As a preferred option, wedge blocks 6 are available in various specifications and can be prefabricated for use on-site.

[0052] Furthermore, the height of the wedge block 6 is less than the height of the retaining platform 13. When in use, it is fully inserted into the V-shaped gap to facilitate the pouring of cement mortar from above.

Claims

1. A construction method for road base precast side form backrest integration, characterized in that, It comprises the following steps: S1, prefabricate side mold (1) and backrest (2); The side mold (1) is rectangular in overall structure, one end of which is provided with a gable (11) structure and the other end is provided with a groove (12) structure along the length direction, and integrated pipelines (5) are arranged along the length direction in the side mold, a plurality of rod passing holes are provided on the side mold along the length direction and are spaced apart, the rod passing holes are vertically arranged and do not interfere with the integrated pipelines, and a stop table (13) is provided on one side of the side mold along the length direction and protrudes upward; The backrest (2) is rectangular in overall structure, a plurality of adjusting holes (21) are provided along the length direction and are spaced apart, and the center distance of adjacent adjusting holes (21) is equal to the center distance of adjacent rod passing holes. S2, fix the side mold; Determine the elevation on both sides of the road base (7), place the side mold, make the stop table (13) located on the outside, then insert the positioning rod (3) into the rod passing hole to fix the side mold, and the upper part of the positioning rod (3) is exposed outside the side mold; Pass the electric wire through the integrated pipelines (5) of the side mold, and insert the gable (11) and the groove (12) of adjacent side molds. S3, integrate the backrest (2) and the side mold (1) together; Sleeve the backrest sleeve into the upper part of the positioning rod (3) and place it in the front area of the stop table (13) of the side mold, and knock the positioning rod (3) into the backrest. S4, place the curb stone (4); Place the curb stone (4) on the side mold above the front area of the backrest, and construct the asphalt pavement.

2. A method of construction according to claim 1, wherein, In step S1, the upper end of the backrest towards the curb stone (4) side is inwardly inclined, and the inclination angle is α; In step S4, the curb stone (4) is inclined and placed on the front area of the backrest above the side mold.

3. A method of construction according to claim 2, wherein, In step S4, first lay cement mortar on the top of the side mold, and then place the curb stone (4) obliquely.

4. A method of construction according to claim 2 or 3, wherein, In step S1, the diameter of the adjusting hole (21) is greater than the diameter of the rod passing hole, the adjacent surface of the stop table (13) and the backrest is an inclined surface, and the inclination angle is α, so that a V-shaped gap is formed between them; In step S4, install the curb stone control line, place the curb stone (4) behind the backrest after the curb stone (4) is placed, adjust the positions of the two ends of the backrest until the top of the curb stone (4) coincides with the control line, and insert at least two wedge-shaped blocks (6) into the V-shaped gap between the backrest and the stop table (13); Pour cement mortar into the adjusting hole (21) and the V-shaped gap.

5. A method of construction according to claim 4, wherein, The wedge-shaped block (6) has multiple specifications.

6. A method of construction according to claim 4 wherein, The adjusting hole (21) is not in the center of the backrest, but is arranged to the front side.

7. A method of construction according to claim 4 wherein, The height of the wedge-shaped block (6) is less than the height of the stop table (13).

8. The method of claim 1, wherein In step S1, the height of the backrest is greater than the height of the stop table (13).

9. The method of claim 1, wherein In step S1, the groove (12) structure of the side mold comprises two vertically arranged inner side plates (121) and outer side plates (122), the inner side plate (121) has the same height as the front part of the side mold, the rear side plate has the same height as the stop table (13), the inner side plate (121) and the outer side plate (122) have the same width, and the groove (12) is formed between them.

10. The method of claim 1, wherein The rod passing hole is located at the center line position of the length direction of the side mold.

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