Steel circular drainage inspection well in ultra-deep vertical shaft
By using a steel circular drainage inspection well made of multiple steel pipes spliced together in an ultra-deep vertical shaft, the problems of high construction difficulty and poor structural stress of reinforced concrete inspection wells have been solved, realizing a fast and safe construction process and improving structural stability and waterproof performance.
Patent Information
- Application Number
- CN202423149046.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-12-19
AI Technical Summary
The construction of reinforced concrete inspection wells in ultra-deep vertical shafts is difficult due to the poor structural stress and the presence of high-risk welding operations, resulting in long construction periods and low safety.
The circular steel drainage inspection well is constructed by splicing multiple sections of steel pipes, using steel clamps for connection and sealing for waterproofing, with a steel baffle plate welded to the bottom, and a short column for connection to the vertical shaft. The structure and connection method are optimized to improve performance.
It improves construction speed and safety, reduces construction difficulty, enhances structural stability and waterproof performance, and has both environmental and economic benefits.
Smart Images
Figure CN223907638U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of circular drainage inspection well structure, concretely relates to a steel circular drainage inspection well in super deep vertical shaft. BACKGROUND
[0002] The municipal water supply and drainage pipeline engineering of large cities often contains a large number of pipe jacking or shield and other open cut methods. With the continuous development of urbanization, the distribution of underground pipelines and underground structures is becoming more and more dense, leading to the continuous deepening of the pipe jacking well and shield well set in the pipe jacking or shield open cut method. The depth of the pipe jacking well and shield well built in the center of the city of the developed coastal city generally exceeds 20m, and the depth of individual super deep wells reaches 30-50m. These super deep vertical shafts integrate the drainage, maintenance and other functions of the open cut water supply and drainage pipeline, so multiple super deep drainage inspection wells are often set in the vertical shaft. The top of the drainage inspection well is above the ground, and the bottom is connected to the large-diameter water supply and drainage pipeline in the vertical shaft through a small-diameter steel pipe. The shaft body of these super deep vertical shafts is a reinforced concrete structure, so the drainage inspection well set in the vertical shaft is also a super deep reinforced concrete structure. The construction contains high-risk source construction operations such as high formwork (formwork height ≥ 8m) and high scaffold, so there are problems such as complicated construction process, long construction period and high construction difficulty. In addition, the super deep inspection well and the super deep vertical shaft generally share one side wall, so the planar shape of the inspection well is generally a rectangle (when the vertical shaft is rectangular) or a triangle (when the vertical shaft is circular). When the drainage well is filled with water under drainage conditions, the bottom wall is prone to cracking under the action of the internal water tension; the deeper the vertical shaft, the more serious the drainage well wall cracking.
[0003] Therefore, the utility model provides a steel circular drainage inspection well in a super deep vertical shaft to solve the above problems in conventional super deep reinforced concrete inspection wells. CONTENT OF THE UTILITY MODEL
[0004] To solve the problems of difficult construction and poor structure of the reinforced concrete inspection well in the super deep vertical shaft, the utility model provides a steel circular drainage inspection well. Multiple steel pipes are spliced, connected by steel clamps and provided with sealing elements for waterproofing, and a steel blanking plate is welded at the bottom to connect with the vertical shaft and set a short column. The structure and connection method are optimized to improve the performance.
[0005] To achieve the above purpose, the utility model is implemented by the following technical solutions:
[0006] A large-diameter circular steel pipe is used as the wall structure of the circular drainage inspection well in the super deep vertical shaft. The steel pipe is spliced in sections along the height direction, and the length of each section is 8-12m.
[0007] A steel clamp with an outer square and inner circular shape is arranged at the splicing joint of each steel pipe, and the inner diameter of the steel clamp is larger than the outer diameter of the steel pipe.
[0008] The steel hoop is assembled by four identical prefabricated steel components by eight connecting bolts.
[0009] The steel hoop is assembled by four identical prefabricated steel components by eight connecting bolts.
[0010] The bottom of the super-deep drainage inspection well is the weakest point of the whole well structure, in order to ensure the stability and waterproof performance of the bottom structure of the super-deep drainage inspection well, a steel plug plate with a diameter slightly larger than that of the steel pipe is arranged at the bottom of the steel pipe, and the steel pipe and the steel plug plate are welded by full welding on the inner and outer sides.
[0011] At the connection between the steel pipe and the shaft top plate, a waterproof sleeve with a size corresponding to the diameter of the steel pipe is pre-buried in the top plate, the steel pipe passes through the waterproof sleeve and extends out of the ground, so as to meet the waterproof sealing performance requirement of the steel pipe passing through the top plate.
[0012] A lockable well cover is arranged at the top of the steel pipe, and a ventilation hole is arranged on the pipe wall above the ground below the well cover.
[0013] Further, the pipe sections of the steel pipe can also be connected by a socket joint to enhance the mechanical connection force between the pipe sections.
[0014] Further, an electric sliding rail can be arranged inside the steel pipe section from the bottom to the top, which facilitates the lifting of mechanical equipment such as water pumps during drainage inspection.
[0015] Correspondingly, the utility model provides a construction method of a steel circular drainage inspection well structure in a super-deep shaft, which comprises the following steps:
[0016] S1: construction of the shaft structure, steel bottom plate reserved at the shaft bottom plate, anchor reinforcement of the steel bottom plate, vertical reinforcement of the cast-in-place reinforced concrete short column, and the top of the vertical reinforcement is reserved with a steel connector;
[0017] S2: the first section of the steel pipe is hoisted from the ground to the well, and the top of the first section of the steel pipe is 1m higher than the ground, the steel blanking plate is arranged at the bottom of the first section of the steel pipe, and the steel blanking plate is welded with the steel pipe on the inside and outside.
[0018] S3: after the second section of the steel pipe is vertically aligned with the first section of the steel pipe on the ground, the steel hoop is installed, the steel hoop bolt is tightened and prestressed, and the first section of the steel pipe is aligned and clamped with the second section of the steel pipe.
[0019] S4: continue to hoist the second section of the steel pipe from the ground to the well, and the top of the second section of the steel pipe is 1m higher than the ground, install the third section of the steel pipe and the steel hoop between the second section and the third section of the steel pipe,
[0020] S5: repeat steps S3-S4 until all steel pipe stages are installed and hoisted into place, and the top of the last section of the steel pipe is provided with a lockable openable well cover, and a ventilation hole is arranged at the bottom of the well cover.
[0021] S6: the steel blanking plate at the bottom of the first section of the steel pipe in the well is fully welded with the steel bottom plate reserved in S1.
[0022] S7: the construction of the reinforced concrete short column at the bottom of the first section of the steel pipe in the well is completed, the vertical reinforcement of the short column is connected with the steel connector reserved in S1, and the vertical reinforcement of the short column is connected with the anchor connection of the shaft bottom plate.
[0023] S8: construction of the shaft top plate, and embedding a waterproof sleeve pipe corresponding to the diameter of the steel pipe at the top, and the steel pipe passes through the waterproof sleeve pipe and extends out of the ground.
[0024] S9: complete the connection of the drainage hole and the inspection manhole reserved at the bottom of the first section of the steel pipe with the main pipe in the shaft.
[0025] Compared with the traditional drainage inspection well adopting cast-in-place reinforced concrete structure, the beneficial effects of the technical scheme of the utility model are:
[0026] The main body structure of the inspection well adopts a steel pipe, which is prefabricated in a factory, and the structural safety of the prefabricated steel pipe is higher than that of the cast-in-place concrete member. The inspection well adopts a planar circular structure which is separately arranged from the shaft wall, and compared with the planar rectangular or triangular structure which is combined with the shaft wall, the planar circular structure has better stress condition and thinner wall thickness.
[0027] The cast-in-situ structure is only arranged at the bottom of the drainage inspection well, and the construction height is only 1-2m, compared with the cast-in-situ concrete inspection well which is arranged from the bottom of the vertical shaft to the ground, the concrete formwork with the height higher than the height and the floor scaffold are not needed, and a large number of complicated construction steps in the conventional super-deep cast-in-situ concrete structure construction process are omitted. Therefore, the construction speed is fast, the high-risk source construction operation content such as high formwork and high scaffold does not exist in the construction, the special construction scheme review and demonstration work of the high-risk source operation is not needed, the construction difficulty is low, and the safety factor is high. Meanwhile, the combined structure of the steel baffle plate, the steel bottom plate and the cast-in-situ concrete short column improves the structural safety and the overall stability of the weakest point of the super-deep well bottom structure.
[0028] The upper and lower adjacent steel pipe sections are mechanically connected and fixed on the ground by using the prefabricated steel hoop joint, and then are hoisted into the well section by section, compared with the conventional construction mode that the steel pipe is hoisted into the well first and then is welded in the well, the welding operation platform is not needed, the construction speed is faster, the construction quality is more reliable, the high-risk source construction operation content such as the welding and ignition operation in the limited space of the super-deep vertical shaft does not exist in the construction, the construction difficulty is low, and the safety factor is high.
[0029] The water-expanding rubber strip and the waterproof sealing ring are arranged in the steel hoop to form two waterproofs, compared with the conventional waterproof sealing through the welding seam after the steel pipe is welded, the waterproof sealing performance is more reliable and is not affected by the technical level of the welder and the construction operation environment.
[0030] The prefabricated steel hoop and the steel pipe section in the utility model can be recycled and reused, the engineering economy is higher, the construction process has the advantages of energy saving, environmental protection and low carbon, and has good social and economic effects. BRIEF DESCRIPTION OF DRAWINGS
[0031] In order to further illustrate the above-mentioned purposes, structural characteristics and effects of the utility model, the utility model will be described in detail below with reference to the drawings.
[0032] Figure 1 It is a plane arrangement schematic view of the super-deep vertical shaft and the drainage inspection well of the preferred embodiment of the utility model.
[0033] Figure 2 It is a sectional arrangement schematic view of the super-deep vertical shaft and the drainage inspection well in the preferred embodiment of the utility model.
[0034] Figure 3 It is a plane schematic view of the steel hoop which is spliced into a ring at the steel pipe connection in the preferred embodiment of the utility model.
[0035] Figure 4 It is a plane view of the single-piece prefabricated steel member of the steel hoop.
[0036] Figure 5 It is a sectional view along A-A direction.
[0037] Figure 6 A schematic diagram of the elevation of the short reinforced concrete column at the connection between the bottom of the steel pipe and the bottom plate of the shaft.
[0038] Figure 7 This is a cross-sectional view along the BB direction;
[0039] Figure 8 The following is a schematic diagram of the construction steps of a preferred embodiment of this utility model: (a) Pre-embedded components and hoisting of the first section of steel pipe and reserving relevant openings during shaft construction; (b) Hoisting the second section of steel pipe to the ground and clamping it with steel clamps to the first section of steel pipe; (c) Repeatedly hoisting steel pipes and installing steel clamps until all steel pipes are in place; (d) The state of welding the bottom steel plate and steel base plate of the first section of steel pipe.
[0040] The following are the numbered components in the diagram: 1. Shaft wall; 2. Drainage inspection well; 3. Steel clamp; 4. Main pipe; 5. Drainage hole; 6. Manhole; 7a. Outer side plate; 7b. Inner side plate; 7c. Rib plate; 7d. Connecting plates at both ends; 8. Connecting bolt; 9. Water-swellable rubber strip; 10. Waterproof sealing ring; 11a. Cast-in-place reinforced concrete short column; 11b. Steel base plate; 11c. Anchor bar; 11d. Longitudinal bar; 11e. Rebar connector; 11f. Steel sump plate; 12. Manhole cover; 13. Waterproof sleeve; 14. Vent hole; 15. Electric slide rail; 16. Pipe socket. Detailed Implementation
[0041] The terms “utility model” and “this utility model” used in this specification are intended to broadly refer to all subject matter of this specification and any of the following patent claims. Statements containing these terms should not be construed as limiting the subject matter described herein or limiting the meaning or scope of any of the following patent claims. Furthermore, this specification does not attempt to describe or limit the subject matter covered by any claim of any particular component, paragraph, statement, or drawing of this application. The subject matter should be understood with reference to the entire specification, all drawings, and any of the following claims. This utility model may have other embodiments and be practiced or implemented in other ways. Moreover, it should be understood that the wording and terminology used herein are for illustrative purposes and should not be considered limiting.
[0042] The details of the present invention will now be discussed with reference to the accompanying drawings, which are illustrated by way of example only. In the drawings, similar features or components may be labeled with the same reference numerals.
[0043] The use of "include", "have", and "comprise" and variations thereof herein are meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Although reference can be made in the description to directions such as up, down, back, front, rear, bottom, top, under, above, over, under, etc., for the purposes of this disclosure reference is made to the accompanying drawings for purposes of illustration where such terms can be used. These directions are not intended in any way to limit the scope of the application. Additionally, terms such as "first", "second", "third", etc. are used herein for purposes of description and are not intended to indicate or imply importance or significance.
[0044] Referring to Figure 1 and Figure 2 shown, in the preferred embodiment of the present application, the ultra-deep drainage inspection well 2 is independently arranged outside the ultra-deep vertical shaft wall 1, the ultra-deep drainage inspection well 2 is formed by vertically splicing multiple circular steel pipes, and a steel clamp 3 is used for mechanical connection at the pipe joint seam. A plurality of drainage pipes and their valves connected with the main pipeline 4, a manhole 6 and its gate are arranged at the bottom of the drainage inspection well 2. A steel blanking plate 11f is arranged at the bottom of the drainage inspection well 2, is welded with the reserved steel bottom plate 11b of the vertical shaft bottom plate, and a cast-in-place reinforced concrete short column 11a is used to wrap the bottom of the drainage inspection well 2, so as to realize the connection between the drainage inspection well 2 and the vertical shaft bottom plate. A waterproof sleeve 13 is arranged on the vertical shaft top plate, the drainage inspection well 2 passes through the steel sleeve and extends out of the ground, and a lockable openable well cover 12 and a breather hole 14 are arranged at the top.
[0045] Figure 3 shown is a plan view of the steel clamp 3 at the pipe joint seam. The steel clamp 3 is an inner circular outer square steel structure, each ring steel clamp 3 is spliced by four steel components, and connecting bolts 8 are used for connection at the steel component splicing position. Figure 4 shown is a large drawing of each steel component. The steel component is composed of an outer side plate 7a, an inner side plate 7b, internal horizontal and vertical rib plates 7c, and two connecting plates 7d. Bolt holes are reserved on the two connecting plates 7d. Figure 5 shown is Figure 3 is a cross-sectional view along A-A. The steel clamp 3 is provided with upper and lower rows of connecting bolts 8, and a horizontal rib plate 7c is arranged in the middle. Water-swelling rubber strips 9 and waterproof sealing rings 10 are arranged between the steel pipe and the steel clamp 3; among them, the waterproof sealing rings 10 are arranged at the center elevation of the upper and lower rows of connecting bolts 8, and the water-swelling rubber strips 9 are arranged between the upper and lower waterproof sealing rings 10. By tightening the connecting bolts 8 and applying prestress, the water-swelling rubber strips 9 and the waterproof sealing rings 10 are compressed, so as to realize the waterproof sealing requirement between the steel pipe joints.
[0046] Figure 6 is Figure 2The large-scale drawing of the bottom of the middle drainage inspection well 2 and the reinforced concrete short column 11a connected with the shaft. When the shaft bottom plate is constructed, the steel bottom plate 11b, the steel bottom plate anchor 11c, the longitudinal reinforcement 11d of the short column and the steel reinforcement connector 11e are pre-buried in the bottom plate. The steel plug plate 11f is arranged at the bottom of the steel pipe of the drainage inspection well 2. After the drainage inspection well 2 is installed in place, the steel plug plate 11f and the steel bottom plate 11b are connected by full welding, the longitudinal reinforcement 11d of the short column is connected with the steel reinforcement connector 11e pre-buried on the bottom plate, the bottom concrete short column 11a is poured, and the connection between the drainage inspection well 2 and the bottom plate is completed. Figure 7 For Figure 6 The cross-sectional view along B-B. The longitudinal reinforcement 11d of the short column is arranged outside the steel bottom plate 11b. The diameter of the steel bottom plate 11b is larger than that of the steel plug plate 11f, and the diameter of the steel plug plate 11f is larger than that of the steel pipe of the drainage inspection well 2.
[0047] Figure 8 (a)- Figure 8 (b) shows the construction sequence diagram of the preferred embodiment of the utility model. Specifically, Figure 8 In (a), when the shaft is constructed, the steel bottom plate 11b and the steel bottom plate anchor 11c are pre-buried on the shaft bottom plate at the position corresponding to the drainage inspection well 2, and the longitudinal reinforcement 11d of the short column and the steel reinforcement connector 11e are pre-buried in the bottom plate. The first section of the steel pipe is hoisted from the ground to the bottom of the well, and the top of the steel pipe is 1m above the ground. The steel plug plate 11f is arranged at the bottom of the first section of the steel pipe, and the steel plug plate 11f and the steel pipe are full-welded on the inside and outside. The drainage hole 5 and the manhole 6 circular hole for connecting with the main pipe 4 in the shaft are pre-buried at the lower part of the steel pipe.
[0048] Figure 8 In (b), after the second section of the steel pipe is vertically aligned with the first section of the steel pipe on the ground, the steel hoop 3 is installed, the steel hoop 3 bolt is tightened and pre-stressed, and the first section of the steel pipe and the second section of the steel pipe are aligned and clamped.
[0049] Figure 8 In (c), the second section of the steel pipe is continuously hoisted from the ground to the bottom of the well, and the top of the steel pipe is 1m above the ground. The steps of (b) and (c) are repeated until all the steel pipes are installed and hoisted to the bottom of the well. Figure 8 (b)- Figure 8 (c) steps are repeated until all the steel pipes are installed and hoisted to the bottom of the well.
[0050] Figure 8 In (d), the last section of the steel pipe is provided with a lockable well cover 12 at the top, and a ventilation hole 14 is arranged at the bottom of the well cover 12. The steel plug plate 11f at the bottom of the first section of the steel pipe in the well and the steel bottom plate 11b pre-buried on the shaft bottom plate are full-welded.
[0051] Figure 2The last step of the construction sequence is also the vertical shaft section layout after the construction is completed. After the construction of the first section of steel pipe bottom reinforced concrete short column 11a in the vertical shaft is completed, the longitudinal reinforcement 11d of the short column is connected with the reserved reinforcement connector 11e on the vertical shaft bottom plate, and the anchoring connection of the longitudinal reinforcement 11d of the short column with the vertical shaft bottom plate is completed. The vertical shaft top plate is constructed, and a waterproof sleeve 13 corresponding in size to the diameter of the steel pipe is embedded in the top. The steel pipe passes through the waterproof sleeve 13 and extends out of the ground. The drainage hole 5 and the manhole 6 reserved in the first section of the bottom steel pipe are connected with the main pipe 4 in the vertical shaft.
[0052] The present application provides a steel circular drainage inspection well structure in an ultra-deep vertical shaft. A circular steel pipe is used to replace the conventional cast-in-situ reinforced concrete as the well wall of the drainage inspection well. A prefabricated steel clamp mechanical connection is used to replace the conventional welding method as the connection method of the steel pipe section. This avoids high-risk source construction operations such as high formwork, high scaffold, and welding and ignition operations in the limited space of the ultra-deep vertical shaft. The prefabricated steel clamp and the steel pipe section can be recycled and reused. The present application has the characteristics of low construction difficulty, short construction period, high construction safety, and the like. The construction process has the advantages of energy saving, environmental protection, and low carbon. The present application has good social and economic effects.
Claims
1. A steel round drainage inspection shaft in an ultra-deep shaft, characterized in that, The utility model relates to a kind of steel pipe manhole, including multiple sections of steel pipe, the section of steel pipe is connected to form circular drainage inspection well (2) along vertical splicing, and the splicing joint of each section of steel pipe is provided with a ring outer square inner circular steel hoop (3), the inner diameter of the steel hoop (3) is greater than the outer diameter of steel pipe, to realize effective connection to steel pipe;The steel hoop (3) is assembled by connecting bolt (8) by connecting several identical prefabricated steel components, each prefabricated steel component includes rectangular outer side plate (7a), arc inner side plate (7b), two end connecting plate (7d) and the rib plate (7c) between outer side plate (7a) and inner side plate (7b) are horizontally and vertically arranged, and bolt hole is reserved on two end connecting plate (7d);Water-swelling rubber strip (9) and compressible waterproof sealing ring (10) are arranged on the inner side of steel hoop (3), water-swelling rubber strip (9) is arranged at the joint of steel pipe, and waterproof sealing ring (10) is arranged at the connecting hole of bolt (8), and pre-stress is applied by tightening bolt (8), to compress waterproof sealing ring (10) and water-swelling rubber strip (9), ensure the waterproof sealing performance of the section of steel pipe.
2. Steel circular drainage inspection shaft in an ultra-deep shaft according to claim 1, characterized in that, The bottom of the steel pipe is provided with a steel baffle (11f), and the shaft bottom plate is provided with a steel bottom plate (11b) with a diameter larger than the steel baffle (11f). The steel baffle (11f) and the steel bottom plate (11b) are connected by full welding. The steel bottom plate (11b) is connected to the shaft bottom plate structure by anchor bars (11c) embedded in the bottom plate.
3. Steel circular drainage inspection well in an ultra-deep shaft according to claim 2, characterized in that, A cast-in-place reinforced concrete short column (11a) is arranged at the connection between the steel pipe (1) and the shaft bottom plate. The diameter of the cast-in-place reinforced concrete short column (11a) is larger than that of the circular steel bottom plate (11b). A circular hoop and longitudinal reinforcement (11d) are arranged in the short column (11a). The longitudinal reinforcement (11d) is distributed outside the steel bottom plate (11b) and anchored in the shaft bottom plate.
4. The steel circular drainage inspection well in an ultra-deep shaft according to claim 1, characterized in that, The top of the steel pipe is provided with a lockable manhole cover (12). A ventilation hole (14) is arranged below the manhole cover (12) and above the pipe wall. The lowermost section of the steel pipe is provided with a drainage hole (5) connected to the main pipeline (4) in the shaft and an inspection manhole (6).
5. The steel circular drainage inspection well in an ultra-deep shaft according to claim 1, characterized in that, The pipe sections of the steel pipe can also be connected by a socket joint. A special waterproof sealing ring is arranged inside the socket joint.
6. The steel circular drainage inspection well in an ultra-deep shaft according to claim 1, characterized by, An electric sliding rail (15) can be arranged in the pipe section of the steel pipe from the bottom to the top, facilitating the lifting of water pump mechanical equipment during drainage inspection.