Pre-buried semi-reverse-sequence construction method for urban road gutter inlet

Abstract

The invention relates to the technical field of municipal road drainage, and discloses an urban road gutter inlet pre-buried semi-reverse-sequence construction method which comprises the following steps that construction preparation is conducted; excavating a road groove; a gutter inlet main body is pre-buried, meanwhile, a road base is constructed, and the gutter inlet main body is tightly covered with a cover plate on the gutter inlet main body; paving construction of a road surface layer is carried out; cutting a road surface layer, and lifting the gutter inlet main body upper cover plate; mounting a corresponding gutter inlet part at the top of the exposed gutter inlet main body, and finally grouting and trowelling the road joint; according to the construction method, the gutter inlet main body implementation procedure and the road base procedure are constructed at the same time, the gutter inlet main body is pre-buried in the road base, the follow-up road surface layer is not affected by a gutter inlet structure when being paved, meanwhile, the hole used for lifting the cover plate is cut by using a cutting method, and the construction efficiency is improved. The size and the elevation of the dug gutter inlet can be more easily and accurately controlled, and the device has the advantages of ensuring the overall quality of a road and reducing the cost investment.

Description

Technical Field

[0001] The present invention relates to a pre-buried semi-inverse construction method for urban road rainwater inlets, belonging to the technical field of municipal road drainage. Background Art

[0002] After years of development of urban construction in China, rich construction experience has been accumulated. Especially in the collaborative construction of urban roads and rainwater systems, some excellent construction methods have emerged. Currently, in the construction of urban road rainwater inlets, the traditional construction method and the reverse excavation construction method are the most common.

[0003] Such as Figure 1 shown, the traditional construction method includes the following technological processes: Construction preparation → Roadbed excavation and leveling → Masonry and installation of rainwater inlets → Construction of road base → Construction of road surface → Construction of rainwater inlet joints → Completion of construction.

[0004] This kind of traditional construction method has the following problems: The integrity of the road is poor, and the common quality problems at the rainwater inlets are difficult to eradicate.

[0005] Since the rainwater inlet is directly connected to the road surface, it forms a certain separation of the road, which makes it difficult to continuously construct each structural layer of the road. That is, affected by the rainwater inlet, the paver cannot set a unified road width value for one-time paving. In order to bypass the rainwater inlet, it needs to frequently adjust the paving width. The adjustment of the width during the paving process of the paver will reduce the uniformity of the paving thickness, resulting in poor integrity of the road surface, easy to crack, affecting the quality. Moreover, it is difficult to unify the distance control when the paver bypasses the rainwater inlet. In actual construction operations, gaps of unequal widths are often left, which need to be filled by manual paving. Compared with mechanical operation, the limitations of manual work are greater. Coupled with the influence of the technical differences of workers, it is very difficult to make the connection flatness between the rainwater inlet and the road surface consistent, and it is also very difficult to ensure the smoothness of the joints. This will not only lead to poor compactness around the rainwater inlet, frequent occurrence of phenomena such as material running, burrs, and vehicle jumping, uneven water collection effect of the rainwater inlet, but also result in poor integrity of the road and low structural strength.

[0006] Such as Figure 2 shown, the reverse excavation construction method includes the following technological processes: Construction preparation → Roadbed excavation and leveling → Construction of road base → Reverse excavation construction of rainwater inlets → Construction of road surface → Installation and joint construction of rainwater grates → Completion of construction.

[0007] The reverse excavation construction method places the "rainwater inlet excavation and masonry" process behind the "road base construction" process. Each structural layer of the road base can achieve continuous and interference-free construction without being affected by the rainwater inlet construction, thus ensuring the integrity and continuity of the road base implementation. Compared with the traditional usage method, it can not only improve the road quality but also enhance the construction efficiency and progress.

[0008] However, the reverse excavation construction method has the following disadvantages: Since the reverse excavation process needs to reverse-excavate the rainwater inlet trench on the formed road surface after the road base or surface layer construction is completed, and then masonry or install the rainwater inlet, this will cause secondary damage and pollution to the base or road surface by the excavator. In addition, considering the need to leave space for manual operation, the trench holes formed by the excavator are mostly large, so large irregular gaps will be formed around the rainwater inlet. Filling such gaps requires a large amount of additional labor, which is not only labor-consuming and material-consuming, but also difficult to guarantee the quality. At the same time, in actual projects, the structural strength of the road base by manual operation and mechanical operation cannot be unified, and the overall quality and appearance effect of the road are not ideal. Strictly speaking, the integrity of the road is still damaged to a certain extent. Moreover, the essence of the reverse excavation method is to exchange rework for efficiency, and rework will result in waste of materials and labor. Summary of the Invention

[0009] In order to solve the above problems existing in the prior art, the present invention provides a pre-buried semi-reverse sequence construction method for urban road rainwater inlets.

[0010] The technical solution of the present invention is as follows: A pre-buried semi-reverse sequence construction method for urban road rainwater inlets, comprising the following steps: The first step: Carry out construction preparation; the construction preparation includes the following steps: familiarize with the construction drawings, clarify the basic parameters and geological conditions of the municipal road, such as the road width of the municipal road, structural form, thickness of each structural layer, side stone specifications, position, size, form of the rainwater inlet, groundwater level, etc.; prepare corresponding construction materials such as side stones, sand, cement, asphalt oil, etc. Asphalt concrete needs to be operated at a certain high temperature, and at the same time, it is necessary to confirm the supply time with the supply mixing station according to the paving process; prepare the required finished components such as rainwater inlet bodies, concrete ring beams, rainwater grates, supports, connecting pipes, covers, etc.; prepare corresponding construction machinery and equipment such as small cranes, excavators, rollers, transport vehicles, pavers, etc.

[0011] While preparing various materials, carry out measurement and setting out, and accurately mark the positions required during construction, such as the road center line, side line, positions of street lights, side stones, installation positions of rainwater inlet bodies, rainwater inlet positions, etc.

[0012] Second step: Excavate the roadbed trench. The excavation of the roadbed trench includes the following steps: First, use an excavator to carry out grooving construction along the road edge line, and the excavation depth should be shallower than the designed depth. Second, level and trim the edges of the excavated roadbed trench and conduct data review. Finally, use a roller to roll and compact the foundation in the roadbed trench, and it is acceptable as long as the compaction degree and trench depth meet the design requirements.

[0013] Third step: In this step, two processes are carried out simultaneously. One is to embed the main structure of the rainwater inlet, and the other is the construction of the road base. First, according to the marks made in advance at the plane position of the rainwater inlet, place the main body of the rainwater inlet into the roadbed trench so that it is stable on the roadbed, and fill the gaps with mortar (or lay a layer of mortar foundation) to make it firm. There are reserved holes on the side wall of the main body of the rainwater inlet. Insert one end of the connecting pipe into the reserved hole for connection, and the other end is connected to the external rainwater main pipe. Then, use waterproof mortar to seal and compact the connection positions of the connecting pipe, such as the connection position between the connecting pipe and the reserved hole, and the connection position between the connecting pipe and the external rainwater main pipe. It should be noted that when the designed elevation at the bottom of the main body of the rainwater inlet is different from the elevation at the bottom of the roadbed trench, it is necessary to lay a layer of cement mortar to adjust the elevation of the roadbed trench at the position of the rainwater inlet, and then carry out the sealing and compaction with waterproof mortar. While arranging the main structure of the rainwater inlet, the construction of the road base can be carried out. The road base is generally divided into two layers. First, carry out the construction of the first layer. The first layer is generally natural graded gravel. After using a bulldozer to spread this layer, use a roller to level and roll and compact it. Then, carry out the construction of the second layer of the road base. This layer is generally cement stabilized gravel. After using a bulldozer to spread it to the designed elevation, use a roller to level and roll and compact it. The overall thickness of the road base is generally 50 - 60 cm. The road base is slightly higher than the main structure of the rainwater inlet. After the completion of the road base, the main body of the rainwater inlet is embedded. Before the main body of the rainwater inlet is embedded, the top of the main body of the rainwater inlet is covered with a cover plate. Steel rings are welded on both the top and bottom surfaces of the cover plate. The steel rings are set at the proximal positions at both ends of the cover plate. When the cover plate covers the main body of the rainwater inlet, the steel rings on the bottom surface of the cover plate at both ends are in contact with the corresponding inner side walls in the main body of the rainwater inlet to prevent the cover plate from being rubbed by the subsequent roller during travel, resulting in material leakage and blocking the water outlet of the rainwater inlet. The cover plate generally uses a steel cover plate with a thickness of 10 - 12 mm, and generally the height of the cover plate is slightly lower than the top elevation of the road base.

[0014] Fourth step: After the structural strength of the road base reaches the design requirements, carry out the paving construction of the road surface, which specifically includes the following steps: First, sprinkle a layer of bonding oil on the road base, and then carry out the paving construction of the road surface. The road surface is also divided into two layers. The lower layer of the road surface is medium-grained or coarse-grained asphalt concrete, and the upper layer of the road surface is fine-grained asphalt concrete. The total thickness of the road surface is about 10 - 15 mm. Both layers of the road surface are paved with a paver, and pave and roll one layer until the design index is reached.

[0015] Step 5: Cut the road surface layer and lift the cover plate covering the main body of the rainwater inlet, which specifically includes the following steps: After the road surface layer is paved and compacted to be qualified, according to the boundary of the marked rainwater inlet position in advance, use corresponding tools such as a cutting saw (machine) to cut out the boundary corresponding to the cover plate on the road surface layer. Then, use tools to expose the steel ring on the top of the cover plate, hang the lifting rope, and use a small crane or excavator outside the road to lift the cover plate and lift it off the main body of the rainwater inlet. The residual asphalt concrete and sand on the cover plate are relatively clean and can be reused.

[0016] Step 6: Install a concrete ring beam, a support, and a rainwater grate on the exposed top of the main body of the rainwater inlet, and finally grout and level the joint, which specifically includes the following steps: After the cover plate is lifted off, the top of the main body of the rainwater inlet is exposed. Then, install a concrete ring beam, a rainwater grate, and a support on the top of the main body of the rainwater inlet. Among them, the concrete ring beam is installed at the peripheral side position of the top of the main body of the rainwater inlet, the support is installed on the concrete ring beam, and the rainwater grate is installed on the support. After installation, the joint between the concrete ring beam, the support, and the rainwater grate and the road is filled with grout and leveled, and the construction is completed.

[0017] The present invention has the following beneficial effects: The present invention provides a pre-buried semi-reverse construction method for urban road rainwater inlets. By simultaneously constructing the main body implementation process of the rainwater inlet and the road base process, the main body of the rainwater inlet is pre-buried in the road base, and with the setting of the cover plate, no material leakage phenomenon will occur during the pre-burial process of the road base for the main body of the rainwater inlet. Due to the pre-burial of the main body of the rainwater inlet in the road base, no structure can be seen in the roadbed, so that the construction of the road surface layer can operate normally without being affected. The paver can pave all the way to the end, and the integrity of the road surface layer is fundamentally guaranteed, and the overall quality of the road is also guaranteed. In addition, the border cut by the cutting method (i.e., the rainwater inlet boundary) is much flatter and more precise and much smaller than the hole dug by the reverse excavation method using an excavator. The size and elevation of the rainwater inlet hole can be accurately controlled, so that the treatment of the joint between the rainwater inlet and the road is very simple, the quality of the joint part of the rainwater inlet is more stable, the rainwater inlet is easily and accurately connected with the drainage system, the drainage is smoother, the subsequent maintenance and rectification workload caused by construction errors is reduced, and the consumption of labor and materials is extremely small, reducing the project construction and maintenance costs. Compared with the prior art, it has the advantages of strong road integrity, large road structure strength, low cost investment, and short construction period. Description of the Drawings

[0018] Figure 1 is the construction process flow chart of the traditional construction method; Figure 2 is the construction process flow chart of the reverse excavation construction method; Figure 3It is the construction process flow chart of the present invention; Figure 4 It is the cross-sectional view of the rainwater inlet main body installed in the road in the present invention; Figure 5 It is the structural schematic diagram of the rainwater inlet main body; Figure 6 It is the structural schematic diagram of the rainwater grate and the support.

[0019] The reference signs in the figure are shown as: 1. Rainwater inlet main body; 2. Road base course; 3. Cover plate; 4. Road surface course; 5. Concrete ring beam; 6. Rainwater grate; 7. Support; 8. Connecting pipe; 9. Road trough; 10. Foundation; 11. Reserved hole; 12. Steel ring. Specific implementation manner

[0020] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0021] Embodiment: Please refer to Figures 3 to 6 , this embodiment provides a buried semi-inverse construction method for urban road rainwater inlets, including the following steps: The first step: Carry out construction preparation; the construction preparation includes the following steps: familiarize with the construction drawings, clarify the basic parameters and geological conditions of the municipal road, such as the road width of the municipal road, structural form, thickness of each structural layer, side stone specifications, position, size, form of the rainwater inlet, groundwater level, etc.; prepare corresponding construction materials such as side stones, sand, cement, asphalt oil, etc. Asphalt concrete needs to be operated at a certain high temperature, and at the same time, it is necessary to contact and confirm the supply time with the supply and mixing station according to the paving process; prepare the finished components required such as the rainwater inlet main body 1, concrete ring beam 5, rainwater grate 6, support 7, connecting pipe 8, cover plate 3, etc.; prepare corresponding construction machinery and equipment such as small cranes, excavators, rollers, transport vehicles, pavers, etc.

[0022] While preparing various materials, carry out measurement and setting out, and accurately mark the positions required during construction, such as the road center line, side line, positions of street lights, side stones, installation position of the rainwater inlet main body 1, rainwater inlet position, etc.

[0023] The second step: Excavate the road trough 9. The excavation of the road trough 9 includes the following steps: First, use an excavator to carry out grooving construction according to the road side line, and the excavation depth should be shallower than the design depth. Secondly, level and trim the excavated road trough 9 and conduct data review. Finally, use a roller to compact and tamp the foundation 10 in the road trough 9, and the compaction degree and trough depth meet the design requirements.

[0024] Step 3: Two processes are carried out simultaneously in this step. One is to embed the structure of the rainwater inlet main body 1, and the other is to construct the road base 2. First, according to the marks made in advance at the planar position of the rainwater inlet, place the rainwater inlet main body 1 into the road trench 9 so that it is stably located on the roadbed, and fill the gaps with mortar (or lay a layer of mortar foundation) to make it firm. There are reserved holes 11 on the side wall of the rainwater inlet main body 1. Insert one end of the connecting pipe 8 into the reserved hole 11 for connection, and connect the other end to the external rainwater main pipe. Then, use waterproof mortar to seal and compact the connection positions of the connecting pipe 8, such as the connection position between the connecting pipe 8 and the reserved hole 11 and the connection position between the connecting pipe 8 and the external rainwater main pipe. It should be noted that when the design elevation of the bottom of the rainwater inlet main body 1 is different from the elevation of the bottom of the road trench 9, it is necessary to lay cement mortar to adjust the elevation of the road trench 9 at the position of the rainwater inlet, and then carry out the sealing and compaction of the waterproof mortar. While arranging the structure of the rainwater inlet main body 1, the construction of the road base 2 can be carried out. The road base 2 is generally divided into two layers. First, carry out the construction of the first layer. The first layer is generally natural graded gravel. After using a bulldozer to spread this layer, use a roller to level and compact it. Then, carry out the construction of the second layer of the road base 2. This layer is generally cement stabilized gravel. After using a bulldozer to spread it to the design elevation, use a roller to level and compact it. The overall thickness of the road base 2 is generally 50 - 60 cm, and the specific thickness can be selected and set according to the actual situation. The top of the road base 2 is slightly higher than the top of the rainwater inlet main body 1. After the completion of the road base 2, the rainwater inlet main body 1 is embedded. Before the rainwater inlet main body 1 is embedded, the top of the rainwater inlet main body 1 is covered with a cover plate 3. The cover plate 3 covers the top of the rainwater inlet main body 1 tightly. Steel rings 12 are welded on both the top and bottom surfaces of the cover plate 3. The steel rings 12 are symmetrically arranged on the top and bottom surfaces of the cover plate 3. At the same time, the steel rings 12 are arranged at the proximal positions at both ends of the cover plate 3. When the cover plate 3 covers the rainwater inlet main body 1, the steel rings 12 at both ends on the bottom surface of the cover plate 3 are in contact with the corresponding inner side walls in the rainwater inlet main body 1 to prevent the cover plate 3 from being rubbed by the roller during the construction of the road base 2, resulting in material leakage. The cover plate 3 is generally made of a steel cover plate with a thickness of 10 - 12 mm, and the specific thickness can be selected and set according to the actual situation. Generally, the height of the cover plate 3 is slightly lower than the top elevation of the road base 2.

[0025] Step 4: After the structural strength of the road base course 2 reaches the design requirements, the paving construction of the road surface course 4 is carried out, which specifically includes the following steps: First, sprinkle a layer of bonding oil on the road base course 2, and then carry out the paving construction of the road surface course 4. Since there are no structures related to the rainwater inlet in the cross-section of the roadbed 9 at this time, the paver can achieve paving all the way to ensure the integrity of the road surface course 4. The road surface course 4 can also be divided into two layers. The lower layer of the road surface course 4 is medium-grained or coarse-grained asphalt concrete, and the upper layer of the road surface course 4 is fine-grained asphalt concrete. The total thickness of the road surface course 4 is about 10 - 15 mm, and the specific thickness can be selected and set according to the actual situation. Both layers of the road surface course 4 are paved by a paver, and each layer is paved and then compacted until the design index is reached.

[0026] Step 5: Cut the road surface course 4 and lift the cover plate 3 covering the rainwater inlet main body 1, which specifically includes the following steps: After the paving of the road surface course 4 is completed and compacted to be qualified, according to the boundary of the rainwater inlet position marked in advance, use corresponding tools such as a cutting saw (machine) to cut out the boundary corresponding to the cover plate 3 on the road surface course 4. Then, use relevant tools such as a shovel to expose the steel ring 12 on the top of the cover plate 3. Then, hang a lifting rope on the steel ring 12 at this position, and use a small crane or an excavator outside the road to lift the cover plate 3 and lift it off the rainwater inlet main body 1. The residual asphalt concrete and sand on the cover plate 3 are relatively clean and can be reused. At the same time, if the rainwater inlet main body 1 is a single-grid rainwater inlet and its volume is small, then the weight of the cover plate 3 used is also small, and the cover plate 3 can also be lifted off the rainwater inlet main body 1 by manual lifting.

[0027] Step 6: Install corresponding rainwater inlet components on the exposed top of the rainwater inlet main body 1, that is, install the concrete ring beam 5, the support 7 and the rainwater grate 6, and finally grout and level the joint between the corresponding rainwater inlet components and the road, which specifically includes the following steps: After the cover plate 3 is lifted off, the top of the rainwater inlet main body 1 is exposed. Then, install the concrete ring beam 5, the rainwater grate 6 and the support 7 on the top of the rainwater inlet main body 1. Among them, the concrete ring beam 5 is installed on the peripheral side position of the top of the rainwater inlet main body 1, the support 7 is installed on the concrete ring beam 5, and the rainwater grate 6 is installed on the support 7. After the installation is completed, the joints between the concrete ring beam 5, the support 7 and the rainwater grate 6 and the road are filled with grout and leveled, and the construction is completed.

[0028] A pre-buried semi-inverse construction method for urban road rainwater inlets provided in this embodiment can not only achieve the continuous construction of each base course and surface course of the road, but also realize the one-time forming of all structural layers of the road. At the same time, it can avoid the waste caused by reverse excavation construction, and more effectively ensure the road quality. The construction method provided in this embodiment has no rework process and does not require a small excavator to excavate the rainwater inlet like the reverse construction method, avoiding the damage and pollution of the formed road surface by the excavator. The reverse excavation method uses an excavator to excavate the road surface and masonry or install the rainwater inlet in the excavated pit. When operating by reverse excavation, the excavation hole size is increased due to the need to leave an operating space, which causes a large amount of additional engineering work for subsequent joint filling and edge connection. The construction method provided in this embodiment completely avoids this kind of operation and the way of excavating the rainwater inlet by the excavator. The method of cutting with a cutting machine can accurately control the size and elevation of the excavated rainwater inlet, so that there is almost no rework engineering quantity in the actual use of this construction method, and no large amount of manual labor is required, thus greatly improving the construction efficiency and completely solving the cross-interference problem between the structural layer and the rainwater inlet process in municipal road construction, and fundamentally ensuring the integrity and continuity of the municipal road.

[0029] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present invention.

[0030] Next, mainly compared with the relatively advanced reverse excavation method, the advantages of the present invention are mainly reflected in the following points: 1. It realizes the overall integrity of the road structure in a complete sense and greatly improves the road quality.

[0031] Different from the reverse excavation method that only ensures the continuous construction of the road base course 2, the present invention can realize the overall construction of all structural layers of the road and the continuous construction between layers. When implementing the road base course 2, the main body 1 of the rainwater inlet can be pre-buried at the same time. The main body 1 of the rainwater inlet can be understood as the lower half of the rainwater inlet. In this way, after covering the cover plate 3 on the main body 1 of the rainwater inlet, the main body 1 of the rainwater inlet will not conflict with the road surface course 4 in terms of elevation, and will not affect the progress of the paver during the implementation of the road surface course 4. It enables the construction processes of the road base course 2 and the road surface course 4 to be continuously implemented, fundamentally ensuring the integrity of the road, and qualitatively improving the bearing capacity and quality of each structural layer of the road.

[0032] 2. The construction accuracy is greatly improved, the connection of the rainwater inlet is smoother, and the water collection and drainage effect is better.

[0033] First, the completion of the road surface layer 4 means that all layers of the road have been completed. On this basis, cutting the road surface can locate the rainwater inlet more accurately than the reverse excavation method of excavating on the base layer. Second, using a cutting machine to cut the rainwater inlet hole can more easily and accurately control the size and elevation of the rainwater inlet than using an excavator for reverse excavation in the reverse excavation method. Since there is no need for manual operation inside the pit, it can be "tailored" according to the size specifications of each component of the rainwater inlet, making it easier to ensure the precise connection between the rainwater inlet and the surrounding road and drainage system, improving the water collection and drainage effects of the rainwater inlet, and reducing problems such as poor drainage and water accumulation around the rainwater inlet.

[0034] 3. The organization of the construction process is more reasonable and easier to overall manage.

[0035] Implementing the road base layer 2 and the pre-embedded rainwater inlet main body 1 in the same stage. When the bulldozer levels the base material, it can incidentally pre-embed the rainwater inlet main body 1, achieving cross-construction without interference with each other, serving multiple purposes with one operation, organizing and carrying out each process more reasonably, and not needing to consider the influence of waiting time for structural strength. The present invention enables the construction unit to overall arrange the road construction in a clearer and simpler order, making the construction organization more orderly and facilitating the allocation of human, material, and financial resources.

[0036] 4. There is no rework, the construction period is shortened, the cost is reduced, and the resource utilization efficiency is improved.

[0037] The present invention does not involve reverse excavation and does not require using an excavator to reverse excavate the trench, so there is no waste of the earth and stone materials filled and compacted in the previous process of reverse excavation. This construction method can continuously complete the construction of the road base layer 2 and the road surface layer 4 without interruption, avoiding the problem of repeated construction in the reverse excavation method, eliminating the labor waste caused by the cross-construction of the road structure layer and the rainwater inlet, reducing the additional usage time of mechanical equipment due to rework, etc., without damaging the road structure layer around the rainwater inlet in the reverse excavation construction method, and without manual caulking and paving operation processes, improving the mechanical utilization rate, and significantly shortening the construction period; the caulking treatment of the rainwater inlet joint is simple, saving material costs, labor costs, and time costs; the quality of the joint around the rainwater inlet is more stable, reducing the subsequent maintenance and rectification workload caused by construction errors to a certain extent, and reducing the facility maintenance cost. The present invention helps to reduce the input of human, material, and financial resources and management costs in the whole life cycle of the municipal road project, optimize the resource allocation, and improve the construction resource utilization efficiency.

Claims

1. A method for pre-buried semi-reverse construction of urban road rainwater inlets, characterized in that: The following steps are involved: Conduct construction preparations; Excavating a road trench (9); The rainwater inlet body (1) is preburied, and the road base (2) is constructed at the same time, and a cover plate (3) is used on the rainwater inlet body (1) to cover the rainwater inlet body (1) tightly; Carry out paving construction of the road surface layer (4); Cutting the road surface layer (4) and lifting the upper cover plate (3) of the rainwater inlet body (1); The corresponding gully component is installed on the top of the exposed gully body (1), and finally the joint between the corresponding gully component and the road is grouted and smoothed.

2. The method for pre-buried semi-reverse construction of urban road rainwater inlets according to claim 1, characterized in that: The construction preparation includes the following steps: Be familiar with the construction drawings and understand the basic parameters and geological conditions of municipal roads; Prepare relevant construction materials; Prepare a rainwater inlet body (1), a concrete ring beam (5), a rainwater grate (6), a support (7), a connecting pipe (8) and a cover plate (3); Prepare corresponding construction machinery and equipment; While preparing various materials, measurements are taken and lines are laid out, and the required locations for construction are marked.

3. The method for pre-buried semi-reverse construction of urban road rainwater inlets according to claim 1, characterized in that: The excavation of the road trench (9) comprises the following steps: Grooving shall be carried out according to the road sideline, and the excavation depth shall be shallower than the designed depth; Leveling, trimming and data review of the excavated road trench (9); The foundation (10) in the excavated road trench (9) is rolled and compacted, and the compaction degree and the depth of the road trench (9) meet the design requirements.

4. The method for pre-buried semi-reverse construction of urban road rainwater inlets according to claim 3 is characterized in that: The pre-buried rainwater inlet body (1) comprises the following steps: The rainwater inlet body (1) is placed in the inlet groove (9) according to the design. A reserved hole (11) is opened on one side wall of the rainwater inlet body (1). One end of the connecting pipe (8) is connected to the reserved hole (11), and the other end is connected to the external rainwater main pipe. Then, the connection position of the connecting pipe (8) is sealed and compacted using waterproof mortar.

5. The method for pre-buried semi-reverse construction of urban road rainwater inlets according to claim 4, characterized in that: The construction of the road base (2) comprises the following steps: The road base (2) is constructed on the foundation (10), and after the road base (2) is constructed and laid, the rainwater inlet body (1) is pre-buried.

6. The method for pre-buried semi-reverse construction of urban road rainwater inlets according to claim 5, characterized in that: The method of using the cover plate (3) to cover and compact the rainwater inlet body (1) comprises the following steps: Before the rainwater inlet body (1) is embedded in the road base (2), a cover plate (3) is placed on the top of the rainwater inlet body (1) so that it covers the top of the rainwater inlet body (1) tightly. Steel rings (12) are arranged on the top and bottom surfaces of the cover plate (3). The steel rings (12) are symmetrically arranged on the same surface of the cover plate (3). When the cover plate (3) covers the top of the rainwater inlet body (1) tightly, the bottoms of the steel rings (12) on both sides are locked against the corresponding side inner walls of the rainwater inlet body (1).

7. The method for pre-buried semi-reverse construction of urban road rainwater inlets according to claim 1, characterized in that: The road surface layer (4) paving construction comprises the following steps: After the structural strength of the road base (2) reaches the design requirements, a layer of binding oil is first sprinkled on the road base (2), and then the paving construction of the road surface layer (4) can be carried out.

8. The method for pre-buried semi-reverse construction of urban road rainwater inlets according to claim 2, characterized in that: The method of cutting the road surface layer (4) and lifting the upper cover plate (3) of the rainwater inlet body (1) comprises the following steps: After the road surface layer (4) is paved, a card frame corresponding to the cover plate (3) is cut out on the road surface layer (4) according to the corresponding position marked in advance, and then the steel ring (12) located on the top of the cover plate (3) is exposed, and a hanging rope is hung on the exposed steel ring (12), and then the cover plate (3) is lifted off the rainwater outlet body (1).

9. The method for pre-buried semi-reverse construction of urban road rainwater inlets according to claim 1, characterized in that: The step of installing the corresponding gully component on the top of the exposed gully body (1) comprises the following steps: After the cover plate (3) is lifted off, the top of the rainwater outlet body (1) is exposed, and then a concrete ring beam (5), a rainwater grate (6) and a support (7) are installed on the top of the rainwater outlet body (1), wherein the concrete ring beam (5) is arranged at a peripheral position of the top of the rainwater outlet body (1), the support (7) is arranged on the concrete ring beam (5), and the rainwater grate (6) is arranged on the support (7).

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