A high-drop pipe shaft concrete structure with an internally laid pipeline

Abstract

The present invention discloses a high-drop pipe well concrete structure with internal laid pipelines, aiming to solve the problem that the space of the high-drop shaft is small and personnel cannot enter the shaft to install pipelines, and to ensure the safety of personnel, the welding quality of pipelines and the feasibility of the test plan during the pipeline installation process. The structure includes an upper equipment room, a lower equipment room, a high-drop shaft, and a number of water supply and drainage steel pipes. The drainage steel pipes are vertically arranged in the high-drop shaft, and a backfilled concrete structure is provided in the high-drop shaft. The construction method steps include first excavating the upper equipment room and the lower equipment room, and excavating the high-drop shaft; hoisting the water supply and drainage steel pipes; and segmentally filling the excavated high-drop shaft with concrete. When the drop of the pipe well exceeds a certain height, the high-drop pipe well can be divided into several sections, and the above pipeline laying, concrete structure and construction method can be set to be similar or the same.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy and hydropower engineering, and in particular to a high-drop pipe well concrete structure with internal laid pipelines. Background Art

[0002] In water conservancy and hydropower projects, a large number of underground chambers are set up to arrange equipment to meet the operation needs of facilities, including many water supply systems, leakage or maintenance drainage systems. Affected or restricted by the downstream river tail water level, these water supply and drainage systems set the water supply and drainage pipelines above the highest downstream tail water level. Since the underground chamber and the downstream tail water level are isolated by thick rock masses. In order to find a simple, smooth and safe drainage line, sometimes it is necessary to chisel vertical shafts with a drop of dozens of meters or even hundreds of meters in the thick rock mass to arrange the water supply and drainage pipelines. For the safety during the rock excavation construction process and to save investment costs, the excavation cross-sectional dimensions of these shafts often only consider being able to accommodate the drainage pipelines. In this way, there are no more safety protection measures for the shafts for personnel or equipment. There may be falling rocks in the high-drop shafts, and there is also a risk of falling from a height when personnel enter. Especially in the shaft space after installation, personnel simply cannot enter. This causes great difficulties in the installation of pipelines and the backfilling of concrete. At the same time, the construction quality and long-term operation of the pipelines cannot be fully guaranteed. It is urgent to find a safe and effective method to ensure the safety of personnel during pipeline laying, reduce the construction difficulty, and also ensure the reliability of the laid pipelines, and ensure the long-term safe and stable operation of the water supply and drainage system pipelines.

[0003] In the past, some projects used reverse drilling to separately excavate small-diameter shafts without lining inside the shafts, and the pipelines were laid openly in the pipe wells. The advantage of this is that personnel do not need to install and operate inside the pipe wells. The problem is that when there are many water supply and drainage pipelines, it is necessary to excavate many small-diameter shafts to meet the pipeline laying needs, and the economic cost is relatively high; if affected by geological conditions, a pump house with a larger plane size needs to be set up to correspond to the pipelines inside the pipe wells. And during long-term operation, falling rocks in the shafts may cause damage or destruction to the pipelines or equipment inside the pipe wells.

[0004] Therefore, after summarizing the deficiencies of the existing high-drop pipe well settings, the present technical invention attempts to use large-scale mechanical excavation of large-diameter shafts to reduce the number of shafts and arrange more water supply and drainage pipelines. To ensure the safe operation of the pipelines, the methods of integral hoisting, sectional welding, and mechanical pouring of segmented and layered concrete are used to solve the safety and long-term stable operation of pipeline laying. After consulting the literature, similar practices have not been reported. Summary of the Invention

[0005] The present invention provides a high-drop pipe shaft concrete structure with internal laid pipelines, aiming to solve the problem that the space in the high-drop shaft is small and personnel cannot enter the shaft to install pipelines, ensuring the safety of personnel during the pipeline installation process, the welding quality of the pipelines, and the feasibility of the test plan; at the same time, after the pipeline installation is completed, a reasonable and safe high-drop shaft backfill concrete structure is designed to determine the order and timing of concrete pouring to ensure the safety of the installed drainage pipelines and the shaft structure.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A pipeline laying and concrete structure in a high-drop pipe shaft of the present invention includes an upper equipment room, a lower equipment room, a high-drop shaft, and a plurality of water supply and drainage steel pipes. The high-drop shaft is excavated between the upper equipment room and the lower equipment room. The drainage steel pipes are vertically arranged in the high-drop shaft, and a backfill concrete structure is provided in the high-drop shaft.

[0008] Preferably, the backfill concrete structure includes, from top to bottom, the first-section concrete of the shaft with a "T"-shaped concrete structure, the second-section concrete of the shaft with a cylindrical concrete structure, and the third-section concrete of the shaft with an inverted "T"-shaped concrete structure.

[0009] Preferably, the drainage steel pipe is formed by connecting the ends of a plurality of steel pipe sections. A steel pipe support cylinder for supporting the bottom steel pipe section is provided in the lower equipment room, and an upper steel frame platform for installing and fixing the top steel pipe section is provided at the top position of the high-drop shaft in the upper equipment room.

[0010] Preferably, a concrete layer of the lower equipment room is laid on the top of the lower equipment room. Steel support plates are respectively erected around the four sides where the bottom of the third-section concrete of the shaft contacts the concrete layer of the lower equipment room, and round pipe columns are well supported under the steel support plates. A connecting steel pipe is provided in the concrete layer of the third-section concrete of the shaft, and the connecting steel pipe is inserted into both the concrete layer of the third-section concrete of the shaft and the concrete layer of the lower equipment room.

[0011] Preferably, a traffic tunnel is provided in the lower equipment room.

[0012] A construction method for a pipeline laying and concrete structure in a high-drop pipe shaft of the present invention includes the following steps:

[0013] Step 1: First, excavate the upper equipment room, the lower equipment room, and the traffic tunnel to complete the layout room for the excavation equipment of the high-drop shaft, and excavate the high-drop shaft.

[0014] Step 2: Erect a hoisting device in the upper equipment room, use the hoisting device to lift a plurality of steel pipe sections, and weld and install the steel pipe sections to form a water supply and drainage steel pipe.

[0015] Step 3, conduct segmented concrete backfilling for the excavated high-drop shaft.

[0016] Preferably, step 2 further includes:

[0017] Step 201, after the excavation of the high-drop shaft is completed, erect a hoisting device in the upper equipment room;

[0018] Step 202, use the hoisting device to lift the steel pipe pipe sections, and erect a temporary pipeline support platform in the lower equipment room to support the steel pipe pipe sections at the bottom. The hoisting device lifts the steel pipe pipe sections and welds the steel pipe pipe sections in sequence to form a water supply and drainage steel pipe;

[0019] Step 203, erect a steel platform at the top of the high-drop shaft, and use the steel frame platform to fix the water supply and drainage steel pipe horizontally and in the direction of the shaft;

[0020] Step 204, seal the upper and lower ends of the water supply and drainage steel pipe respectively and conduct a water pressure test. After confirming that the water pressure test is passed, set up a steel pipe support cylinder at the bottom of the water supply and drainage steel pipe;

[0021] Step 205, repeat steps 202, 203, and 204 to complete the installation of all water supply and drainage steel pipes in the high-drop shaft.

[0022] Preferably, step 3 further includes:

[0023] Step 301, divide the backfill concrete in the high-drop shaft into three sections, namely, the shaft section one concrete of the "T"-shaped concrete structure, the shaft section two concrete of the cylindrical concrete structure, and the shaft section three concrete of the inverted "T"-shaped concrete structure;

[0024] Step 302, pour the concrete layer of the lower equipment room at the top of the lower equipment room and erect the connecting steel pipe 12 at the same time. After the concrete layer of the lower equipment room is completed, erect steel support plates around the perimeter where the bottom of the shaft section three concrete contacts the concrete layer of the lower equipment room, and support round pipe columns under the steel support plates;

[0025] Step 303, erect a material guiding pipe in the high-drop shaft, and conduct segmented concrete pouring for the shaft section one concrete, the shaft section two concrete, and the shaft section three concrete in sequence through the material guiding pipe.

[0026] Preferably, the method further includes: Step 4, divide the high-drop pipe well into several section structures, and use the methods of steps 1-3 for each section structure to construct until the pipeline laying and concrete structure construction in the entire high-drop pipe well are completed.

[0027] The main achievement of this technical invention is that equipment rooms for equipment operation and installation are provided at both the upper and lower ends of the high-drop vertical shaft, solving the space required for equipment layout during the excavation of the high-drop vertical shaft. The lower equipment room can also serve as a slag transportation channel during the excavation of the vertical shaft, and can also be used as an operation and support platform for pipeline installation in the high-drop vertical shaft, solving the construction site problem of the high-drop pipe well. At the same time, for the pipeline construction of the ultra-high-drop vertical shaft, the lower equipment room can also serve as the upper equipment room of the lower section of the vertical shaft, enabling the reuse of space. At the same time, the sectional method is used to solve the pipeline construction problem of the ultra-high-drop vertical shaft. This technical invention adopts the method of docking the pipeline suspended and installed on the upper part of the hoisting equipment with the steel pipe sections in the lower equipment room, solving the difficulty of cramped construction space for personnel in the vertical shaft and avoiding construction safety risks such as falling stones in the vertical shaft, high-altitude falls, and working in a toxic gas environment during the construction process.

[0028] This technical invention divides the high-drop vertical shaft into three sections for concrete construction, sets different concrete structures for different sections, and connects them together with steel pipes between the concrete at the lower part of the vertical shaft and the top of the lower equipment room. By adopting a construction process staggered in time, it not only solves the problem of large load-bearing of the bottom formwork for concrete backfilling construction in the high-drop vertical shaft, but also ensures that the structure of the high-drop vertical shaft can withstand the large loads generated during the operation of the water supply and drainage pipelines. This technical invention has been proven feasible through practical application in a large project, and at the same time, it also greatly saves the investment during the installation process and is worthy of popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a concrete structure of a high-drop pipe well with internally laid pipelines according to the present invention.

[0030] Figure 2 It is a pipeline installation state diagram of step 2 of the construction method of a concrete structure of a high-drop pipe well with internally laid pipelines according to the present invention.

[0031] Figure 3 It is a pouring state diagram of the three sections of concrete in the vertical shaft in step 3 of the construction method of a concrete structure of a high-drop pipe well with internally laid pipelines according to the present invention.

[0032] Figure 4 It is a pouring state diagram of the second section of concrete in the vertical shaft in step 3 of the construction method of a concrete structure of a high-drop pipe well with internally laid pipelines according to the present invention.

[0033] Figure 5 It is a pouring state diagram of the first section of concrete in the vertical shaft in step 3 of the construction method of a concrete structure of a high-drop pipe well with internally laid pipelines according to the present invention.

[0034] Labels in the figure:

[0035] 1. Hoisting equipment; 2. Concrete transport vehicle; 3. Hook; 4. Feeding pipe; 5. Flange type hoisting cover; 6. Water supply and drainage steel pipe; 7. Steel frame platform; 8. Upper equipment room; 9. Concrete for the first section of the shaft; 10. Concrete for the second section of the shaft; 11. Concrete for the third section of the shaft; 12. Connecting steel pipe; 13. Concrete layer of the lower equipment room; 14. Lower equipment room; 15. Traffic tunnel; 16. Steel support plate; 17. Circular pipe column; 18. Steel pipe support cylinder; 19. Steel pipe section; 20. Temporary support platform for pipelines. Specific implementation mode

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation modes.

[0037] As Figure 1 , Figure 2 shown, a high-drop pipe shaft concrete structure with internal pipelines laid therein according to the present invention includes an upper equipment room 8, a lower equipment room 14, a high-drop shaft, a plurality of water supply and drainage steel pipes 6. The high-drop shaft is excavated between the upper equipment room 8 and the lower equipment room 14. The drainage steel pipes 6 are vertically arranged in the high-drop shaft, and a backfill concrete structure is provided in the high-drop shaft.

[0038] The backfill concrete structure includes, from top to bottom, the concrete for the first section of the shaft 9 with a "T" - shaped concrete structure, the concrete for the second section of the shaft 10 with a cylindrical concrete structure, and the concrete for the third section of the shaft 11 with an inverted "T" - shaped concrete structure.

[0039] The lower equipment room 14 is provided with a traffic tunnel 15. A concrete layer of the lower equipment room 13 is laid on the top of the lower equipment room 14. Steel support plates 16 are respectively erected around the contact part between the bottom of the concrete for the third section of the shaft 11 and the concrete layer of the lower equipment room 13, and circular pipe columns 17 are well supported under the steel support plates 16. A connecting steel pipe 12 is arranged in the concrete layer of the concrete for the third section of the shaft 11, and the connecting steel pipe 12 is inserted into both the concrete layer of the concrete for the third section of the shaft 11 and the concrete layer of the lower equipment room 13.

[0040] The lower equipment room 14 and the traffic tunnel 15 can provide sufficient space for the installation, welding and hydrostatic test of the lower part of the water supply and drainage pipelines 6. At the same time, when the concrete in the shaft with installed pipelines is backfilled, it can also be used as the installation space for the construction of the lower support steel formwork 16. When laying pipelines and backfilling concrete in a shaft with a relatively large drop, the shaft can be segmented, and more intermediate equipment installation platforms can be set at the segmentation points by imitating the lower equipment room 14 and the traffic tunnel 15, which can reduce the difficulty of laying pipelines in a shaft with a large drop, improve the difficulty of backfilling the concrete structure in a shaft with an ultra - high drop, and improve the safety of the water supply and drainage pipeline system.

[0041] The water supply and drainage steel pipe 6 is composed of several steel pipe sections 19 connected end to end. A steel pipe support tube 18 is provided in the lower equipment room 14 to support the bottom steel pipe section 19. The upper equipment room 8 is provided with an upper steel frame platform 7 at the top of the high-drop vertical shaft for installing and fixing the top steel pipe section 19.

[0042] The embodiment of the present invention also provides a construction method for a high-drop pipe well concrete structure with pipelines laid inside, the method comprising the following steps:

[0043] Step 1, first excavate the upper equipment room 8 and the lower equipment room 14, the traffic tunnel 15, complete the excavation of the high-drop vertical shaft, arrange the equipment room, and excavate the high-drop vertical shaft.

[0044] Step 2, set up the lifting equipment 1 in the upper equipment room 8, use the lifting equipment 1 to lift a number of steel pipe sections 19, and weld and install the steel pipe sections 19 to form the water supply and drainage steel pipes 6.

[0045] like Figure 3 As shown, the step 2 further comprises:

[0046] Step 201, after the excavation of the high-drop vertical shaft is completed, the lifting equipment 1 is set up in the upper equipment room 8.

[0047] Step 202, use the lifting device 1 to lift the steel pipe segment 19, and set up a temporary pipeline support platform 20 in the lower equipment room 14 to support the bottom of the steel pipe segment 19. The lifting device 1 lifts the steel pipe segment 19 and welds the steel pipe segment 19 in sequence to form a water supply and drainage steel pipe 6. In the specific operation, the lifting device 1 and the lifting hook 3 of the lifting device are mainly used for lifting when installing the pipeline in the shaft, and are connected to the steel pipe segment 19 through the flange lifting cover 5.

[0048] Step 203, erecting a steel platform 7 at the top of the high-drop vertical shaft, and using the steel frame platform 7 to fix the water supply and drainage steel pipe 6 horizontally and in the vertical direction of the shaft.

[0049] Step 204, the upper and lower ends of the water supply and drainage steel pipe 6 are respectively sealed and a water pressure test is performed. After confirming that the water pressure test has passed, a steel pipe support tube 18 is set at the bottom of the water supply and drainage steel pipe 6.

[0050] Step 205, repeating steps 202, 203 and 204 to complete the installation of all water supply and drainage steel pipes 6 in the high-drop shaft.

[0051] Step 3: Backfill the excavated high-drop vertical shaft with concrete in sections.

[0052] Step 4, divide the high-drop pipe shaft into several sections, and construct each section using the method of steps 1-3 until the pipeline laying and concrete structure construction in the entire high-drop pipe shaft are completed.

[0053] As Figure 4 , Figure 5 shown, step 3 further includes:

[0054] Step 301: Divide the backfill concrete in the high-drop shaft into three sections, namely, the shaft section one concrete 9 of the "T"-shaped concrete structure, the shaft section two concrete 10 of the cylindrical concrete structure, and the shaft section three concrete 11 of the inverted "T"-shaped concrete structure;

[0055] Step 302: Pour the lower equipment room concrete layer 13 on the top of the lower equipment room 14 while erecting the connecting steel pipe 12. After the lower equipment room concrete layer 13 is completed, steel support plates 16 are erected around the bottom of the shaft section three concrete 11 in contact with the lower equipment room concrete layer 13, and round pipe supports 17 are well supported below the steel support plates 16 to ensure that the concrete slurry does not seep out from the edge where the lower equipment room concrete layer 13 contacts the steel support plate 16.

[0056] Step 303: Erect a material guiding pipe 4 in the high-drop shaft, and sequentially carry out segmented concrete pouring for the shaft section one concrete 9, the shaft section two concrete 10, and the shaft section three concrete 11 through the material guiding pipe 4.

[0057] The specific implementation steps of step 303 are as follows:

[0058] After determining that the water supply and drainage steel pipe 6 is firmly fixed to the upper steel frame platform 7 and the lower steel pipe support cylinder 18, place the material guiding pipe 4 to the middle and lower area of the shaft section three concrete 11, and use the concrete transport vehicle 2 to pour the concrete aggregate along the material guiding pipe 11 into the shaft section three concrete 11. The arranged material guiding pipe 4 can move in all directions on the steel frame platform 7 and can also be adjusted in the elevation direction to facilitate evenly pouring the concrete aggregate into each area of the shaft section three concrete 11.

[0059] After the concrete poured in the shaft section three concrete 11 reaches the equal-strength strength and can be used as the support formwork for the shaft section two concrete 2, place the material guiding pipe 4 to the middle and lower area of the shaft section two concrete 10, and use the concrete transport vehicle 2 to pour the concrete aggregate along the material guiding pipe 4 into the shaft section two concrete 10, and evenly pour the concrete aggregate into each area of the shaft section two concrete 10.

[0060] After the concrete to be poured in the second section of the shaft reaches the equivalent strength, place the material guide pipe 4 in the middle and lower area of the concrete 9 in the first section of the shaft. Use the concrete transport vehicle 2 to pour the concrete aggregate along the material guide pipe 4 into the concrete 9 in the first section of the shaft, and evenly pour the concrete aggregate in each area of the concrete 9 in the first section of the shaft. After the concrete strength of the concrete 9 in the first section of the shaft reaches the equivalent strength, the concrete backfilling work of the entire high-drop shaft is completed.

Claims

1. A high-drop pipe shaft concrete structure with an internally laid pipeline, characterized in that, It includes an upper equipment room (8), a lower equipment room (14), a high-drop shaft, and several water supply and drainage steel pipes (6). The high-drop shaft is excavated between the upper equipment room (8) and the lower equipment room (14). The drainage steel pipes (6) are vertically arranged in the high-drop shaft, and a backfill concrete structure is provided in the high-drop shaft; The backfill concrete structure includes, from top to bottom, shaft section one concrete (9) of a "T"-shaped concrete structure, shaft section two concrete (10) of a cylindrical concrete structure, and shaft section three concrete (11) of an inverted "T"-shaped concrete structure; A lower equipment room concrete layer (13) is laid on the top of the lower equipment room (14). Steel support plates (16) are respectively erected around the bottom of the shaft section three concrete (11) in contact with the lower equipment room concrete layer (13), and round pipe columns (17) are well supported below the steel support plates (16); a connecting steel pipe (12) is arranged in the concrete layer of the shaft section three concrete (11), and the connecting steel pipe (12) is inserted into both the concrete layer of the shaft section three concrete (11) and the lower equipment room concrete layer (13) at the same time; The water supply and drainage steel pipes (6) are formed by end-to-end connection of several steel pipe sections (19). A steel pipe support cylinder (18) for supporting the bottom-end steel pipe section (19) is provided in the lower equipment room (14), and an upper steel frame platform (7) for installing and fixing the top-end steel pipe section (19) is provided at the top position of the high-drop shaft in the upper equipment room (8).

2. The high-drop pipe well concrete structure with internal laying pipeline according to claim 1, characterized in that, The lower equipment room (14) is provided with a traffic tunnel (15).

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