Installation method of large-volume concrete joint surface joint grouting embedded pipe

Abstract

The invention discloses a mounting method of a large-volume concrete joint surface joint grouting embedded pipe. The mounting method comprises the following steps: S1, designing a construction drawing for pipeline arrangement of each irrigation area; s2, when a construction warehouse surface position map is drawn, according to the number of layers of the irrigation area corresponding to each construction area, pipeline arrangement in the transverse river direction or pipeline arrangement in the along river direction is selected; s3, when the drawing units are drawn, turning areas of multiple pipelines in a single joint grouting system are determined; s4, the drawing unit further comprises a first turning area site diagram and a second turning area site diagram; and S5, construction site disclosure is carried out, and constructors are supervised to carry out pipeline arrangement construction strictly according to the construction drawing. The possibility of pipeline laying confusion of the hydroelectric dam joint grouting system can be reduced, and the pipeline smoothness is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of dam construction, and particularly relates to an installation method for a large-volume concrete joint surface joint grouting pre-buried pipe. Background Art

[0002] Hydropower dams are usually cast in sections and compartments, such as Figure 1 As shown in the figure, the dam is divided into multiple construction sections, each of which forms a dam section. Each dam section is then poured in compartments along the height direction, and a dam block is formed after each compartment is poured. In order to form the overall stress condition, joint grouting is required for the joints between the dam sections. The thickness and temperature of the concrete before grouting the joints of the joints should meet the design conditions. Therefore, it is necessary to grout the joints after the concrete pouring is completed and reaches the specified time and strength. Therefore, usually when pouring the dam section concrete, the grouting steel pipe is pre-buried in the dam body concrete, and grouting is carried out after the concrete meets the conditions to achieve joint grouting of the joints of the joints.

[0003] The joint grouting pipelines are complicated and the laying path is long, which makes it difficult to distinguish and easy to confuse different pipelines during the installation process, resulting in missing or incorrect burial, causing project quality accidents or defects.

[0004] The conventional way to identify pipelines is to hang a label on the pipe mouth to identify the pipeline name, or to use different diameters and materials to distinguish the pipelines. However, the label on the pipe mouth is easy to fall off and damage, and the effect is poor; the diameter and material distinction is generally used when the pipeline is led in and out, which does not cover the entire pipeline installation process. If the installation is wrong, there will be mistakes later; in addition, using different diameters and materials for the same grouting system will increase the complexity and cost of construction. Summary of the invention

[0005] The present invention provides an installation method for a large-volume concrete joint surface joint grouting pre-buried pipe, so as to solve the problem of great difficulty in the construction of the joint grouting pipeline.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: The installation method of the pre-buried pipe for grouting the joint surface of a large volume concrete comprises the following steps: S1: Design construction drawings for the pipeline layout of each irrigation area: According to the design location of the dam maintenance trestle, the dam is divided into several construction areas, and each construction area forms a construction drawing. The construction drawing includes the joint grouting system design of all irrigation areas in the corresponding construction area; the construction drawing includes a construction warehouse surface location map and several drawing units. The construction warehouse surface location map is used to display the location area of ​​grouting construction in the construction area, and the joint grouting system design drawing of a single irrigation area is drawn in the drawing unit; S2: When drawing the location map of the construction warehouse surface, according to the number of irrigation area layers corresponding to each construction area, choose to arrange the pipelines in the cross-river direction or along the river direction, and determine the area where the pipelines are led out of the warehouse surface on the downstream surface of the dam as the exit area; S3: When drawing the drawing unit, determine the first turning area where multiple pipes in a single joint grouting system turn from a horizontal state to a vertical state, and the second turning area where multiple pipes turn from a vertical state to a horizontal state again; S4: The drawing unit also includes a first turning area location diagram and a second turning area location diagram. The first turning area location diagram is a top view of the relative position arrangement of each pipeline when it is horizontally cut after each pipeline is turned from a horizontal state to a vertical state. The second turning area location diagram is a relative position arrangement of each pipeline when it is led out of the warehouse surface after each pipeline is turned from a vertical state to a horizontal state. S5: Brief the construction site and supervise the construction personnel to strictly follow the construction drawings to carry out pipeline layout construction.

[0007] Further, the joint grouting system comprises: Slurry inlet pipeline, through which slurry is poured into the seam surface; The return slurry pipeline forms a circulation pipeline with the slurry inlet pipeline to discharge the slurry that has not entered the seam surface out of the dam body in time; The first exhaust pipeline and the second exhaust pipeline are used to discharge the air and accumulated water in the joint surface and the slurry inlet pipeline until slurry meeting the required concentration seeps out, indicating that the grouting is completed.

[0008] Furthermore, the horizontally arranged pipelines in the first turning area site diagram turn upward by 90° and then are led out to the high elevation of the dam body in a vertical state. After the turn, the pipelines closer to the bottom of the dam are closer to the downstream of the warehouse surface; the vertically arranged pipelines in the second turning area site diagram turn downstream by 90° and then are led out of the warehouse surface in a horizontal state. After the turn, the pipelines closer to the downstream of the warehouse surface are closer to the bottom of the dam.

[0009] Furthermore, in the first turning area site map and the second turning area site map, the irrigation area without sub-irrigation area division includes a slurry inlet pipeline, a slurry return pipeline, a first exhaust pipeline and a second exhaust pipeline, and the above four pipelines are arranged in a square.

[0010] Furthermore, a single irrigation area is divided into two sub-irrigation areas along the upstream and downstream directions of the dam body, and each sub-irrigation area is independently provided with a set of joint grouting system; The first turning area site map and the second turning area site map both include a grouting pipe area and an exhaust pipe area. The grouting pipe area includes the grouting pipe and the return pipe of the upstream and downstream sub-grouting areas, a total of four pipes; the exhaust pipe area includes the first exhaust pipeline and the second exhaust pipeline of the upstream and downstream sub-grouting areas, a total of four pipes; the four pipes in the grouting pipe area and the exhaust pipe area are arranged in a square.

[0011] Furthermore, the transverse river arrangement of a single irrigation area specifically includes: in the first turning area site map, the grouting pipe area and the exhaust pipe area are arranged side by side in a direction perpendicular to the upstream and downstream, and the grouting pipe area is arranged closer to the seam surface than the exhaust pipe area, and the pipeline of the upstream sub-irrigation area is arranged closer to the upstream of the warehouse surface than the pipeline of the downstream sub-irrigation area; In the second turning area site map, the grouting pipe area and the exhaust pipe area are arranged side by side on the same horizontal height line, and the grouting pipe area is closer to the joint surface than the exhaust pipe area, and the pipeline of the upstream sub-irrigation area is closer to the dam top than the pipeline of the downstream sub-irrigation area.

[0012] Furthermore, for the cross-river arrangement where there are two or more irrigation areas in the construction area, the specific arrangement includes: in the first turning area site map, the low-elevation irrigation area pipeline is arranged close to the downstream of the warehouse surface, the high-elevation irrigation area pipeline is arranged close to the upstream of the warehouse surface, and the low-elevation irrigation area pipeline is arranged close to the downstream; In the second turning area site map, the low-elevation irrigation area pipeline is arranged close to the dam bottom, the high-elevation irrigation area pipeline is arranged close to the dam top, and the low-elevation irrigation area pipeline is arranged close to the dam bottom.

[0013] Furthermore, the arrangement along the river for a single irrigation area specifically includes: in the first turning area site map, the grouting pipe area and the exhaust pipe area are arranged side by side in the upstream and downstream directions, and the grouting pipe area is arranged closer to the downstream of the warehouse surface than the exhaust pipe area, and the slurry inlet pipeline is arranged closer to the seam surface than the slurry return pipeline, and the first exhaust pipeline is arranged closer to the second exhaust pipeline; In the second turning area site diagram, the grouting pipe area and the exhaust pipe area are arranged side by side on the same vertical plane, and the pipelines in the grouting pipe area are closer to the dam bottom than the pipelines in the exhaust pipe area, and the slurry inlet pipeline is closer to the seam surface than the slurry return pipeline and the first exhaust pipeline is closer to the second exhaust pipeline.

[0014] Furthermore, for the construction area where there are two or more irrigation areas arranged along the river, the arrangement specifically includes: in the first turning area site map, the low-elevation irrigation area pipeline is arranged closer to the transverse joint than the high-elevation irrigation area pipeline; In the second turning area site map, the low-elevation irrigation area pipeline is arranged closer to the transverse joint than the high-elevation irrigation area pipeline.

[0015] Furthermore, if the number of irrigation areas corresponding to the construction area is more than two, the construction drawings shall be designed to be arranged along the river; If the number of irrigation area layers corresponding to the construction area is two or less, the construction drawing design shall choose the horizontal river arrangement.

[0016] The present invention can achieve the following beneficial effects: 1. The installation method of embedded pipes for grouting joints of large-volume concrete joints in this application makes the embedded pipe installation method clear and simple, which is convenient for on-site workers to understand and actually construct. By referring to the construction drawings, the purpose and embedded location of each pipeline can be accurately located, and standardized embedded pipe installation can be achieved, thereby reducing the situation of missed or wrong buried pipes. Pipes are not easily confused with each other, and standardized embedded pipe installation is achieved, which is conducive to improving the smooth flow of joint grouting pipelines and ensuring the quality and efficiency of joint grouting construction.

[0017] 2. This application proposes a pipeline arrangement method that is arranged along the river and across the river. Since each construction area corresponds to a large number of irrigation areas, and the grouting operation space corresponding to the construction area is small, this application can adaptively select different pipeline arrangement methods according to the number of irrigation areas corresponding to each construction area. If the number of irrigation areas corresponding to the construction area is large, it can be selected to arrange along the river, so that the joint grouting pre-buried pipe is arranged horizontally when it is led out of the warehouse surface, which is convenient for construction personnel to implement grouting operations. If the number of irrigation areas corresponding to the construction area is small, it can be selected to arrange across the river to save the horizontal area occupied by the warehouse exit area. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the dam structure used to show the division of dam sections and sub-irrigation areas in the present invention; Figure 2 It is an environmental schematic diagram of the dam body and surrounding mountain structures of the present invention; Figure 3 It is a schematic diagram of the pipeline arrangement in a joint grouting system in a sub-irrigation area of ​​the present invention; Figure 4 A top view of one embodiment of the present invention for illustrating the positioning of the first turning area; Figure 5 This is a location diagram of the irrigation area pipeline in the first turning area when the present invention does not divide the sub-irrigation areas; Figure 6 This is a location diagram of the irrigation area pipeline in the second turning area when the present invention does not divide the sub-irrigation areas; Figure 7 It is a schematic diagram of the arrangement of the single-layer irrigation area pipeline in the transverse direction of the river in the first turning area site diagram of the present invention; Figure 8It is a schematic diagram of the arrangement of the multi-layer irrigation area pipeline in the transverse direction of the river in the first turning area site diagram of the present invention; Fig. 9 It is a schematic diagram of the arrangement of the multi-layer irrigation area pipeline in the transverse direction of the river in the second turning area site diagram of the present invention; Fig.10 It is a schematic diagram of the arrangement of the single-layer irrigation area pipeline in the river direction in the first turning area site diagram of the present invention; Fig.11 It is a schematic diagram of the arrangement of the multi-layer irrigation area pipeline along the river in the first turning area site diagram of the present invention; Fig.12 It is a schematic diagram of the arrangement of the multi-layer irrigation pipeline in the river direction in the second turning area site diagram of the present invention.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Dam body; 11. Dam section; 12. Sub-irrigation area; 13. Maintenance trestle; 14. Joint surface; 2. Joint grouting system; 21. Slurry inlet pipeline; 22. Slurry return pipeline; 23. Slurry inlet trough; 24. Slurry lifting trough; 25. Exhaust trough; 26. First exhaust pipeline; 27. Second exhaust pipeline. DETAILED DESCRIPTION

[0020] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0021] like Figure 1 As shown, the seam surface 14 described in this application is the seam surface 14 formed between two adjacent dam sections 11. Each dam section 11 is divided into multiple construction compartments along the height direction. The construction specification recommends that the height of a single irrigation area be 9m-12m and the area be 200 m 2 -300m 2 Every 2 to 4 construction chamber heights are set as a joint grouting area, and a joint grouting system 2 is arranged in each grouting area.

[0022] When grouting is being carried out, the concrete of the corresponding irrigation area and the surrounding concrete structures have been poured, and the concrete temperature of the dam section associated with the irrigation area meets the design requirements; with the pouring construction of the dam body 1, it is necessary to simultaneously construct a maintenance trestle 13 on the downstream side of the dam body 1, which is mainly used as a maintenance passage during the operation period, and also as a construction access road and joint grouting operation platform during the construction period. The maintenance trestle 13 is set at an elevation of about every 50 meters. Each maintenance trestle 13 is responsible for the grouting construction of all irrigation areas between two adjacent maintenance trestle bridges 13. In order to facilitate the construction personnel to realize grouting on the maintenance trestle 13, when the joint grouting system 2 is usually embedded in the concrete of the dam body 1, all the pipelines leading out of the warehouse surface in the system are led or lowered to the construction area near the maintenance trestle 13. In this application, the area corresponding to each maintenance trestle 13 is referred to as a construction area.

[0023] According to the above data, it can be known that each maintenance trestle 13 usually covers 4-5 layers of irrigation area, but this is not always the case during the actual construction process. Figure 2 As shown, usually both sides of the dam body 1 are mountain structures, and the dam body 1 connected to the mountain is sloped. The height of the dam body 1 below the maintenance trestle 13 is reduced, resulting in the maintenance trestle 13 only covering 1-2 layers of irrigation area in this area.

[0024] like Figure 1 and Figure 3 As shown in the figure, in actual construction, if the thickness of the dam body in the upstream and downstream directions exceeds 30m, or the total irrigation area exceeds 400m 2 , the irrigation area is divided into two sub-irrigation areas 12 along the upstream to downstream direction, each sub-irrigation area 12 is arranged with an independent joint grouting system 2, and the pipelines of the joint grouting systems 2 in the two sub-irrigation areas 12 are led out from the warehouse surface on the same side of the dam body 1.

[0025] like Figure 3 As shown, the joint grouting system 2 includes a grouting facility, an exhaust facility, a grouting lifting facility and a grouting stopping facility, wherein the grouting facility is arranged near the bottom of the grouting area, and the exhaust facility is arranged near the top of the grouting area; the grouting lifting facility is arranged between the grouting facility and the exhaust facility. The lifting facility is connected to the grouting facility and disconnected from the exhaust facility, and is used to assist in guiding the grout to flow from the grouting facility to the exhaust facility while the joint surface 14 is expanding and filling; the grouting stopping facility is arranged between two adjacent grouting areas above and below to form a closed grouting area to prevent the grout from leaking out of each grouting area during grouting.

[0026] Reference Figure 3 The pulp feeding facilities include a pulp feeding pipeline 21, a pulp return pipeline 22 and a pulp feeding trough 23. The pulp feeding end of the pulp feeding pipeline 21 extends from the bin surface, and the pulp outlet end is connected with the pulp feeding trough 23; the pulp feeding end of the pulp return pipeline 22 is connected with the pulp feeding trough 23, and the pulp outlet end extends from the bin surface.

[0027] The slurry raising facilities include a plurality of slurry raising grooves 24 , which extend along the height of the joint surface 14 and are semicircular grooves sunken into the construction end surface. After the casting of two adjacent dam sections 11 is completed, they are spliced ​​to form a complete cylindrical slurry raising groove 24 .

[0028] The exhaust facility includes an exhaust groove 25, a first exhaust pipeline 26 and a second exhaust pipeline 27. The slurry inlet ends of the first exhaust pipeline 26 and the second exhaust pipeline 27 are connected to the exhaust groove 25, and the slurry outlet ends extend from the bin surface.

[0029] Among them, the slurry inlet groove 23 is connected to the slurry raising groove 24, the exhaust groove 25 is disconnected from the slurry raising groove 24 by about 30 cm, and the slurry inlet groove 23 and the exhaust groove 25 are both arranged horizontally, thereby forming two slurry circulation loops in the joint grouting system 2 of the present application.

[0030] First, the slurry is poured into the slurry inlet pipe 21 and flows into the slurry inlet groove 23, and is discharged from the silt return pipe 22 with the least resistance to realize the circulating grouting. By applying pressure to the slurry return pipe 22, the slurry enters the joint surface 14, squeezes the air and water in the joint, and fills the joint surface 14. At the same time, the slurry that has not entered the joint surface 14 can be taken out through the circulating grouting to prevent the slurry from accumulating and causing adverse effects on the structure of the dam body 1.

[0031] Secondly, as the pressure of the return slurry pipeline 22 increases, the amount of slurry flowing from the slurry inlet groove 23 to the slurry rising groove 24 increases, and the slurry flows upward along the slurry rising groove 24. In this process, the slurry rising groove 24 serves as a channel for the slurry to diffuse and fill the joint surface 14. After the slurry fills the joint surface 14, it reaches the exhaust groove 25 and flows into the exhaust groove 25; the slurry flows from the exhaust groove 25 to the first exhaust pipeline 26 and the second exhaust pipeline 27, and finally is discharged from the warehouse surface through the first exhaust pipeline 26 and the second exhaust pipeline 27. When slurry meeting the required concentration flows out of the slurry outlets of the first exhaust pipeline 26 and the second exhaust pipeline 27, it indicates that the grouting is completed.

[0032] The grouting stopping facility includes a grouting stopping plate, wherein half of the grouting stopping plate is cast in one dam section 11 and the other half is cast in another adjacent dam section 11, and the grouting stopping plate is arranged horizontally, thereby being able to isolate two vertically adjacent irrigation areas.

[0033] The installation method of the pre-buried pipe for grouting the joint surface of a large volume concrete comprises the following steps: S1: Design construction drawings for the pipeline layout of each irrigation area: According to the design position of the dam maintenance trestle 13, the dam is divided into several construction areas, and each construction area forms a construction drawing. The construction drawing includes the design of the joint grouting system 2 for all irrigation areas in the corresponding construction area.

[0034] Specifically, the construction drawings of each construction area include a construction warehouse surface location map and several drawing units. The construction warehouse surface location map is used to show the location area of ​​grouting construction in the construction area, that is, where on the dam side wall all the pipes in the irrigation area corresponding to the construction area are led out of the warehouse surface; the design drawing of the joint grouting system 2 of a single irrigation area is drawn in the drawing unit, specifically including how each pipe in each joint grouting system 2 is arranged; S2: When drawing the construction warehouse surface location map, according to the number of irrigation area layers corresponding to each construction area, choose to arrange the pipelines in the cross-river direction or along the river. In the following text, the dam surface area occupied by the pipeline when it is led out of the warehouse surface is referred to as the warehouse exit area. The warehouse exit area is also the location for joint grouting after the concrete is ready. The number and location of the irrigation areas corresponding to the construction area also need to be displayed in the construction warehouse surface location map.

[0035] S3: When drawing the drawing unit, determine the first turning area where the multiple pipes in the single joint grouting system 2 turn from the horizontal state to the vertical state, and the second turning area where the multiple pipes turn from the vertical state to the horizontal state again.

[0036] Specifically, when drawing the first turning area positioning drawing, the top view after horizontally cutting the dam body 1 is used as the plane view for determining the position of the first turning area. In the positioning drawing of the first turning area, various pipeline leading areas are delineated. In one embodiment, Figure 4 As shown, the cooling water pipe upper lead area, the consolidation grouting pipe upper lead area, and the joint grouting pipe upper lead area are arranged in sequence from downstream to upstream, wherein the joint grouting pipe upper lead area is the first turning area construction area corresponding to the technical solution of this application. According to the number of lead pipes, warehouse surface area, construction convenience and other factors, the distance between the upper lead area and the transverse seams on both sides and the downstream surface is generally not less than 50cm; the distance between each other is generally not less than 100cm, and the left and right upper lead areas can be arranged symmetrically. Similarly, the positioning drawing of the second turning area can be drawn, and the cross-sectional front view after vertically cutting the dam body 1 is used as the plane view for determining the position of the second turning area.

[0037] S4: The drawing unit also includes a first turning area location diagram and a second turning area location diagram. The first turning area location diagram is a top view of the relative position arrangement of each pipeline when it is horizontally cut after it is turned from a horizontal state to a vertical state. The second turning area location diagram is a relative position arrangement of each pipeline when it is led out of the warehouse surface after it is turned from a vertical state to a horizontal state, that is, a front view when the downstream side of the dam faces the upstream side. In one embodiment, Figure 3 For example, the site map formed by cutting along the AA section is the first turning area site map, and the site map formed by cutting along the BB section is the second turning area site map.

[0038] It should be noted that, refer to Figure 3The pipeline drawing of this application mainly involves pipelines in the slurry inlet facilities and exhaust facilities, specifically including the slurry inlet pipeline 21, the slurry return pipeline 22, the first exhaust pipeline 26 and the second exhaust pipeline 27 in each sub-irrigation area of ​​the upstream sub-irrigation area 12 and the downstream sub-irrigation area 12, a total of eight pipelines. According to the purpose of slurry inlet and exhaust, it is divided into a grouting pipe area and an exhaust pipe area. The grouting pipe area includes the slurry inlet pipeline 21 and the slurry return pipeline 22 of the upstream sub-irrigation area 12, and the slurry inlet pipeline 21 and the slurry return pipeline 22 of the downstream irrigation area 12; the exhaust pipe area includes the first exhaust pipeline 26 and the second exhaust pipeline 27 of the upstream sub-irrigation area 12, and the first exhaust pipeline 26 and the second exhaust pipeline 27 of the downstream sub-irrigation area 12. The four pipelines in the grouting pipe area and the exhaust pipe area are arranged in a square.

[0039] In addition, the slurry circulation circuit of the joint grouting system 2 is described in detail in the previous text. However, due to the large volume of the dam body 1, and one construction area corresponds to several irrigation areas, each irrigation area includes two sub-irrigation areas 12, and each sub-irrigation area 12 is provided with an independent joint grouting system 2. Workers need to stand on the maintenance trestle 13 corresponding to the construction area to perform grouting construction of each joint grouting system 2. The operating surface area that can be operated is small, so it is necessary to lead each pipeline in each sub-irrigation area 12 to the warehouse outlet area, which also leads to more pipelines led out of the warehouse outlet area. Each pipeline includes two horizontal sections and one vertical section, that is, from the slurry inlet to the slurry outlet, the pipeline is first set horizontally, and then turned 90° upward in the first turning area to be vertical, and then turned 90° downstream in the second turning area to be horizontal. During the pipeline leading process, the grouting pipeline in the same irrigation area merges with the exhaust pipeline and is led upward together. The first turning area site diagram of the present application is a site diagram of the pipeline in a vertical state and after merging, and the second turning area site diagram is a site diagram of the horizontal section of the pipeline close to the warehouse exit area.

[0040] There are three specific situations in the drawing. First, the pipeline layout is drawn for the case where no sub-irrigation areas are divided. In addition, for the case where two sub-irrigation areas are divided, one of the drawing methods uses the pipeline layout across the river, and the other uses the pipeline layout along the river. To facilitate reading and understanding below, the corresponding relationship between the pipeline numbers and pipelines in the attached figure is shown in Table 1 below.

[0041] Table 1 Pipeline numbers corresponding to pipeline uses

[0042] Note: ①-⑧ are the pipeline numbers for low-altitude irrigation areas, and ⑨-⑯ are the pipeline numbers for high-altitude irrigation areas.

[0043] like Figure 5 and Figure 6As described, if sub-irrigation areas are not divided, there is no need to divide the grouting pipe area and the exhaust pipe area when drawing the pipeline layout. The slurry inlet pipeline, the slurry return pipeline, the first exhaust pipeline and the second exhaust pipeline in an irrigation area are arranged in a square, specifically including: in the first turning area site diagram, the slurry inlet pipeline and the slurry return pipeline are arranged closer to the downstream of the warehouse surface than the first exhaust pipeline and the second exhaust pipeline; in the second turning area site diagram, the slurry inlet pipeline and the slurry return pipeline are arranged closer to the dam top than the first exhaust pipeline and the second exhaust pipeline, and in the second turning area site diagram, the slurry inlet pipeline, the slurry return pipeline, the first exhaust pipeline and the second exhaust pipeline are still arranged in a square.

[0044] like Figure 7 and Fig. 9 As shown, the transverse river arrangement for a single irrigation area specifically includes: in the first turning area point diagram, the grouting pipe area and the exhaust pipe area are arranged side by side in a direction perpendicular to the upstream and downstream, and the grouting pipe area is arranged closer to the seam surface 14 than the exhaust pipe area, and the pipeline of the upstream sub-irrigation area 12 is arranged closer to the upstream of the warehouse surface than the pipeline of the downstream sub-irrigation area 12; In the second turning area site diagram, the grouting pipe area and the exhaust pipe area are arranged side by side on the same horizontal plane, and the grouting pipe area is closer to the joint surface 14 than the exhaust pipe area, and the pipeline of the upstream sub-irrigation area 12 is closer to the dam top than the pipeline of the downstream sub-irrigation area 12.

[0045] like Figure 8 and Fig. 9 As shown, the cross-river arrangement for the construction area with two or more irrigation areas specifically includes: in the site map of the first turning area, the low-elevation irrigation area pipeline is set close to the downstream of the warehouse surface, and the high-elevation irrigation area pipeline is set close to the upstream of the warehouse surface; in the site map of the second turning area, the low-elevation irrigation area pipeline is set close to the dam bottom, and the high-elevation irrigation area pipeline is set close to the dam top.

[0046] like Fig.10 and Fig.12 As shown, the arrangement along the river for a single irrigation area specifically includes: in the first turning area point diagram, the grouting pipe area and the exhaust pipe area are arranged side by side in the upstream and downstream directions, and the grouting pipe area is arranged closer to the downstream of the warehouse surface than the exhaust pipe area, and the slurry inlet pipeline 21 and the first exhaust pipeline 26 in the sub-irrigation area 12 are arranged closer to the joint surface 14 than the slurry return pipeline 22 and the second exhaust pipeline 27; In the second turning area site diagram, the grouting pipe area and the exhaust pipe area are arranged side by side on the same vertical plane, and the pipelines in the grouting pipe area are closer to the dam bottom than the pipelines in the exhaust pipe area, and the slurry inlet pipeline 21 and the first exhaust pipeline 26 are closer to the joint surface 14 than the slurry return pipeline 22 and the second exhaust pipeline 27.

[0047] like Fig.11 and Fig.12As shown, for the construction area with two or more irrigation areas, the river-going arrangement specifically includes: in the first turning area site map, the low-elevation irrigation area pipeline is closer to the transverse joint than the high-elevation irrigation area pipeline; in the second turning area site map, the low-elevation irrigation area pipeline is closer to the transverse joint than the high-elevation irrigation area pipeline.

[0048] In a preferred embodiment of the present application, if the number of irrigation areas corresponding to the construction area is more than two, the construction drawing design chooses to arrange them along the river; if the number of irrigation areas corresponding to the construction area is two or less, the construction drawing design chooses to arrange them across the river.

[0049] The logic of such a design is that if the irrigation area corresponding to the construction area is within two layers, as mentioned above, the area close to the mountain structure is narrow in the horizontal width direction. At this time, the horizontal river arrangement is adopted, and at most two layers of lead-out pipelines are formed on the vertical surface of the upper edge of the warehouse surface, which is an area where construction personnel can easily grout, and the horizontal width occupied is small. If the irrigation area corresponding to the construction area is more than two layers, the lead-out pipelines of multiple irrigation areas are arranged one by one in horizontal width, and are not stacked in the height direction, so as to reduce the occurrence of situations where the stacking is too high and exceeds the appropriate operating height of the construction personnel, affecting the grouting construction.

[0050] S5: Brief the construction site and supervise the construction personnel to strictly follow the construction drawings to carry out pipeline layout construction.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The installation method of the pre-buried pipe for grouting the joint surface of large-volume concrete is characterized by: The following steps are involved: S1: Design construction drawings for the pipeline layout of each irrigation area: According to the design position of the dam maintenance trestle (13), the dam is divided into several construction areas, and each construction area forms a construction drawing, which includes the design of the joint grouting system (2) of all irrigation areas in the corresponding construction area; the construction drawing includes a construction warehouse surface position map and several drawing units, the construction warehouse surface position map is used to display the location area of ​​grouting construction in the construction area, and the joint grouting system (2) design drawing of a single irrigation area is drawn in the drawing unit; S2: When drawing the location map of the construction warehouse surface, according to the number of irrigation area layers corresponding to each construction area, choose to arrange the pipelines in the cross-river direction or along the river direction, and determine the area where the pipelines are led out of the warehouse surface on the downstream surface of the dam as the exit area; S3: when drawing the drawing unit, determine the first turning area where the multiple pipes in the single joint grouting system (2) turn from the horizontal state to the vertical state, and the second turning area where the multiple pipes turn from the vertical state to the horizontal state again; S4: The drawing unit also includes a first turning area location diagram and a second turning area location diagram. The first turning area location diagram is a top view of the relative position arrangement of each pipeline when it is horizontally cut after each pipeline is turned from a horizontal state to a vertical state. The second turning area location diagram is a relative position arrangement of each pipeline when it is led out of the warehouse surface after each pipeline is turned from a vertical state to a horizontal state. S5: Brief the construction site and supervise the construction personnel to strictly follow the construction drawings to carry out pipeline layout construction.

2. The method for installing the pre-buried pipe for grouting the joint surface of a large volume concrete according to claim 1 is characterized in that: The joint grouting system (2) comprises: A slurry inlet pipeline (21), through which slurry is poured into the seam surface (14); The slurry return pipeline (22) forms a circulation pipeline with the slurry inlet pipeline (21) to discharge the slurry that has not entered the seam surface (14) out of the dam body (1) in a timely manner; The first exhaust pipeline (26) and the second exhaust pipeline (27) are used to exhaust air and accumulated water in the joint surface (14) and the slurry inlet pipeline (21) until slurry meeting the required concentration seeps out, indicating that the grouting is completed.

3. The method for installing the pre-buried pipe for grouting the joint surface of a large volume concrete according to claim 2 is characterized in that: The horizontally arranged pipelines in the first turning area site diagram turn upward 90° and then are led out to the high elevation of the dam body in a vertical state. After the turn, the pipelines closer to the bottom of the dam are closer to the downstream of the warehouse surface; the vertically arranged pipelines in the second turning area site diagram turn downstream 90° and then are led out of the warehouse surface in a horizontal state. After the turn, the pipelines closer to the downstream of the warehouse surface are closer to the bottom of the dam.

4. The method for installing the pre-buried pipe for grouting the joint surface of a large volume concrete according to claim 3 is characterized in that: In the first turning area location diagram and the second turning area location diagram, the irrigation area that is not divided into sub-irrigation areas includes a slurry inlet pipeline (21), a slurry return pipeline (22), a first exhaust pipeline (26) and a second exhaust pipeline (27), and the above four pipelines are arranged in a square.

5. The method for installing the pre-buried pipe for grouting the joint surface of a large volume concrete according to claim 3 is characterized in that: A single irrigation area is divided into two sub-irrigation areas (12) along the upstream and downstream directions of the dam body (1), and each sub-irrigation area (12) is independently provided with a set of joint grouting system (2); The first turning area location diagram and the second turning area location diagram both include a grouting pipe area and an exhaust pipe area. The grouting pipe area includes a grouting pipe (21) and a grouting pipe (22) in the upstream and downstream sub-grouting areas, a total of four pipes; the exhaust pipe area includes a first exhaust pipe (26) and a second exhaust pipe (27) in the upstream and downstream sub-grouting areas, a total of four pipes; the four pipes in the grouting pipe area and the exhaust pipe area are all arranged in a square.

6. The method for installing the pre-buried pipe for grouting the joint of a large volume concrete surface according to claim 5 is characterized in that: The transverse river arrangement of a single irrigation area specifically includes: in the first turning area site map, the grouting pipe area and the exhaust pipe area are arranged side by side in a direction perpendicular to the upstream and downstream, and the grouting pipe area is arranged closer to the joint surface (14) than the exhaust pipe area, and the pipeline of the upstream sub-irrigation area is arranged closer to the upstream of the warehouse surface than the pipeline of the downstream sub-irrigation area; In the second turning area location diagram, the grouting pipe area and the exhaust pipe area are arranged side by side on the same horizontal height line, and the grouting pipe area is arranged closer to the joint surface (14) than the exhaust pipe area, and the pipeline of the upstream sub-irrigation area is arranged closer to the dam top than the pipeline of the downstream sub-irrigation area.

7. The method for installing the pre-buried pipe for grouting the joint surface of a large volume concrete according to claim 6 is characterized in that: The cross-river arrangement for construction areas with two or more irrigation areas specifically includes: in the first turning area site map, the low-elevation irrigation area pipeline is arranged close to the downstream of the warehouse surface, the high-elevation irrigation area pipeline is arranged close to the upstream of the warehouse surface, and the low-elevation irrigation area pipeline is arranged close to the downstream; In the second turning area site map, the low-elevation irrigation area pipeline is arranged close to the dam bottom, the high-elevation irrigation area pipeline is arranged close to the dam top, and the low-elevation irrigation area pipeline is arranged close to the dam bottom.

8. The method for installing the pre-buried pipe for grouting the joint surface of a large volume concrete according to claim 5 is characterized in that: The arrangement along the river direction of a single irrigation area specifically includes: in the first turning area site map, the grouting pipe area and the exhaust pipe area are arranged side by side in the upstream and downstream directions, and the grouting pipe area is arranged closer to the downstream of the warehouse surface than the exhaust pipe area, and the slurry inlet pipeline (21) is arranged closer to the seam surface (14) than the slurry return pipeline (22), and the first exhaust pipeline (26) is arranged closer to the second exhaust pipeline (27); In the second turning area location diagram, the grouting pipe area and the exhaust pipe area are arranged side by side on the same vertical plane, and the pipelines in the grouting pipe area are arranged closer to the dam bottom than the pipelines in the exhaust pipe area, and the slurry inlet pipeline (21) is arranged closer to the joint surface (14) than the slurry return pipeline (22), and the first exhaust pipeline (26) is arranged closer to the second exhaust pipeline (27).

9. The method for installing a pre-buried pipe for grouting a large volume concrete joint surface according to claim 8, characterized in that: The specific arrangement along the river direction for the construction area with two or more irrigation areas includes: in the first turning area site map, the low-elevation irrigation area pipeline is arranged closer to the transverse joint than the high-elevation irrigation area pipeline; In the second turning area site map, the low-elevation irrigation area pipeline is arranged closer to the transverse joint than the high-elevation irrigation area pipeline.

10. The method for installing a pre-buried pipe for grouting a large volume concrete joint surface according to claim 5, characterized in that: If the number of irrigation areas corresponding to the construction area is more than two, the construction drawings shall be designed in the direction of the river; If the number of irrigation area layers corresponding to the construction area is two or less, the construction drawing design shall choose the horizontal river arrangement.

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