Integrated lifting pump station installation construction method in complex environment

Abstract

The application relates to the technical field of municipal drainage construction, and discloses a kind of installation construction method of integrated lifting pump station under complex environment, comprising the following steps: S1, construction control network is established in the area to be installed, including control pile, review survey point and construction leveling point, to determine the center position of pump station shaft, the installation orientation of water inlet and outlet and hoisting reference line, so that the subsequent work shaft construction, pump station hoisting, pipeline connection and backfilling retest all adopt the same coordinate reference; the application combines reverse work shaft, directional lowering, attitude correction, pipe connection limiting, zoned backfilling and acceptance closed loop into continuous construction control chain, so that pump station installation no longer only relies on hoisting experience and manual observation, but forms a measurable, correctable and reviewable construction method, which has small disturbance to surrounding soil, small environmental impact, does not need large-scale slope, has small space occupation, can reduce earthwork excavation amount, has strong environmental adaptability, is safe and reliable, and has good construction quality effect.

Description

Technical Field

[0001] This invention relates to the field of municipal drainage construction technology, and in particular to an integrated lifting pump station installation and construction method in complex environments. Background Technology

[0002] With the acceleration of urbanization and the rapid expansion of urban population, the volume of urban sewage treatment and discharge has increased rapidly. Most cities adopt a system of separating rainwater and sewage, collecting sewage through pipelines to sewage treatment plants for unified treatment and discharge. These sewage pipelines use gravity flow, resulting in deep burials that are uneconomical and unreasonable. Furthermore, some cities have undulating terrain, limiting the laying of gravity-flow sewage pipelines. Therefore, the use of booster pump stations has become widespread, offering advantages such as reducing pipeline burial depth and altering the gravity flow method. However, with technological advancements and the extensive application of intelligent integrated booster pump stations, these stations are large and tall. Excavation typically involves sloping excavation, foundation preparation, pump station installation, and layered backfilling. This results in large excavation and backfill volumes, a high risk factor, and numerous safety hazards, especially in complex terrain environments, making them unsuitable for the needs of social development. Summary of the Invention

[0003] To address the technical problems of existing integrated booster pump stations in complex terrain, deeply buried pipelines, narrow sites, or soft strata, which are caused by large earthwork volumes, high support risks, difficulties in lowering and positioning the pump station, easy deviations in pipe orientation, secondary displacement of the pump station during connection and backfilling, and insufficient anti-buoyancy stability when installed using large-slope excavation methods, this invention provides an installation and construction method for integrated booster pump stations in complex environments.

[0004] This invention is achieved using the following technical solution: an integrated booster pump station installation and construction method in complex environments, comprising the following steps: S1. Establish a construction control network in the proposed installation area, including control piles, verification measurement points and construction leveling points, to determine the center position of the pump station well, the installation orientation of the inlet and outlet and the hoisting reference line, so that the subsequent construction of the working well, pump station hoisting, pipeline connection and backfilling re-measurement all use the same coordinate benchmark; S2. In the area to be installed, the reverse construction method is adopted to excavate layer by layer from top to bottom, and the cap beam or the first section of the retaining wall structure and the steel reinforcement formwork are constructed simultaneously. After each layer of excavation is completed, concrete is poured to form the retaining wall structure, so that the working well wall is supported layer by layer during the excavation process, avoiding soil disturbance and slope instability caused by large-scale slope excavation. S3. After excavation to the design elevation, construct the foundation and bearing plate at the bottom of the working well, and set the center positioning point, the inlet direction positioning line and the outlet direction positioning line on the bearing plate so that the bearing plate serves as both the vertical bearing foundation and the plane installation reference of the pump station. S4. Using hoisting equipment, the integrated lifting pump station is lowered into the working well. The center position, verticality, and inlet / outlet orientation of the pump station well are initially adjusted using the guide positioning structure and the positioning reference on the bearing base plate. This ensures that the central axis of the pump station well corresponds to the central positioning point, and that the inlet and outlet face the corresponding pipe network interface directions. S5. After the pump station is initially positioned, the deviation of the pump station's center position, verticality deviation, and pipe orifice orientation deviation are measured in real time through temporary limiting components and attitude monitoring system arranged around the pump station. Based on the measurement results, the pump station is slightly translated, tilted, or its angle is finely adjusted so that the pump station's attitude meets the design allowable deviation. S6. While the pump station is held in place by temporary limiting components, connect the inlet pipe and the outlet pipe, and set up a backfill support layer around the pipe connection area so that the horizontal thrust, axial tension or local construction disturbance generated during the connection of the inlet pipe and the outlet pipe are not directly transmitted to the overall offset of the pump station shaft. S7. Divide the annular space between the outer perimeter of the pump station and the working well into at least four backfill zones. Use concrete and / or gravel for layered backfilling. The bottom backfill forms an anti-buoyancy constraint, while the upper backfill uses a layered, zoned, and alternating method to control the backfill density and circumferential pressure. After each layer of backfilling is completed, re-measure the pump station's center position, verticality, and pipe orifice orientation. If the deviation exceeds the preset value, adjust the subsequent zone backfilling sequence and the backfilling amount of each backfill zone to correct the pump station's attitude. S8. After backfilling is completed and the pump station's posture is verified as qualified, remove the temporary limiting components and support structure, complete the installation of the top components of the pump station, site cleanup and quality acceptance, so that the overall position, vertical posture, inlet and outlet orientation, pipeline connection accuracy and backfill compaction of the pump station after construction meet the design requirements.

[0005] As a further improvement to the above scheme, in step S2, the excavation depth of each layer does not exceed 1 meter; after each layer of excavation is completed, the retaining wall reinforcement is tied, the formwork is installed, and the concrete is poured immediately, and the upper and lower adjacent retaining walls are connected by reserved steel bars or connecting steel bars to form a continuously stressed cylindrical support system at the working shaft wall. This setting can reduce the suspended exposure height in deep foundation pit construction and improve the construction safety in soft strata or adjacent building structures.

[0006] As a further improvement to the above scheme, in step S3, the center positioning point on the bearing base plate is located at the projected position of the pump station well design center, and the inlet direction positioning line and the outlet direction positioning line correspond to the axis of the inlet pipe and the axis of the outlet pipe to be connected, respectively. By combining the center positioning point, the pipe outlet direction positioning line, and the construction level point to form a verifiable installation benchmark, a unified control chain can be formed between pump station hoisting, attitude correction, pipe connection, and backfilling retesting, avoiding cumulative errors caused by separate measurements in each construction stage.

[0007] As a further improvement to the above scheme, in step S4, the guiding and positioning structure includes at least three guide limiting points arranged at intervals along the circumference of the working well. The guide limiting points are set towards the outer wall of the pump station well and can limit the lateral sway of the pump station during the lowering process. The guide limiting points can be one or more of rollers, arc-shaped pads, wedge-shaped guide blocks, or adjustable limiting heads, so that the pump station is gradually guided in the vertical direction of the center positioning point during the lowering process, rather than relying entirely on the suspension stability of the hoisting equipment.

[0008] As a further improvement to the above solution, in step S5, the temporary limiting component includes a fixed seat, an adjusting screw, and a jacking block. The fixed seat is connected to the side of the protective wall or well wall, the adjusting screw is threadedly connected to the fixed seat, and the jacking block is located at the end of the adjusting screw facing the pump station well shaft. By rotating the adjusting screw in different directions, the corresponding jacking block applies a controllable jacking force to the outer wall of the pump station well shaft, thereby achieving fine adjustment of the pump station's planar position, tilt correction, and pipe inlet angle correction.

[0009] As a further improvement to the above solution, the attitude monitoring system includes one or more of the following: total station, laser plumb line, level, inclinometer, or distance sensor. The attitude monitoring system is used to record the pump station's attitude data multiple times during pump station lowering, temporary stabilization, pipeline connection, and backfilling processes, enabling deviation data to serve as the basis for subsequent correction and final acceptance.

[0010] As a further improvement to the above solution, in step S6, before connecting the inlet and outlet pipes, the area around the pump station is backfilled to below or near the lowest pipe interface height, and then compacted to form a pipe connection support layer. After the pipe connection is completed, additional backfilling and compaction are performed around the pipe interface. This arrangement reduces the risks of partial suspension of the pump station, concentrated stress at the interface, and pump station displacement caused by pipe thrust during pipe connection.

[0011] As a further improvement to the above scheme, in step S7, at least four backfill zones are distributed circumferentially along the pump station shaft, corresponding to the inlet direction, the outlet direction, and the two sides in between. During backfilling, bottom anti-buoyancy backfilling is performed first, followed by upper layer backfilling. The upper layer backfilling adopts an alternating approach of symmetrical zones, diagonal zones, or adjacent zones, and the pump station attitude is re-measured after each layer of backfilling. When the pump station deviates towards a certain backfill zone, the backfilling sequence, compaction degree, or single backfilling height on the deviated side and its opposite side is adjusted to gradually bring the pump station back within the design allowable deviation range.

[0012] As a further improvement to the above scheme, the bottom anti-buoyancy backfill is made by pouring concrete to the design height, and the pump station is kept in a temporary restraint state before the concrete initially sets, so that the pump station will not float, rotate or tilt during the formation of the concrete anti-buoyancy constraint. The upper layer backfill uses gravel, graded crushed stone or backfill materials that meet the design requirements to form uniform circumferential support around the pump station shaft.

[0013] As a further improvement to the above scheme, in step S8, the quality acceptance includes the integrity of the working well wall structure, the elevation of the bearing base plate, the center position of the pump station well, the verticality of the pump station, the orientation of the inlet and outlet, the accuracy of the pipe connection, the compaction of the backfill, and the installation quality of the top components; only after all the above indicators meet the design requirements can the temporary limiting parts and support structures be removed.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention combines reverse construction of the working well, directional lowering, attitude correction, pipe connection limit, zoned backfilling, and acceptance closed loop into a continuous construction control chain, so that the installation of the pump station no longer relies solely on hoisting experience and manual observation, but forms a measurable, calibrable, and verifiable construction method.

[0015] 2. The present invention features a support structure that is constructed first, has high construction stability, is suitable for deep foundation pits or soft strata, causes little disturbance to the surrounding soil and has little impact on the environment, does not require large-scale slope protection, occupies little space, can reduce earthwork excavation, has strong environmental adaptability, is safe and reliable, and has good construction quality and effect. Attached Figure Description

[0016] Figure 1 This is a flowchart of the construction method. Figure 2 This is a cross-sectional view showing the relationship between the installation positions of the reverse-operation working well and the pump station; Figure 3 This is a layout diagram for the positioning reference plane; Figure 4 Top view of the guiding and positioning structure; Figure 5 A sectional view of the temporary limiting component and attitude correction; Figure 6This is a plan view of the annular space partitioning backfill.

[0017] Explanation of key symbols: 1. Working well; 111. Well wall; 2. Wall protection; 3. Bearing base plate; 31. Leveling layer; 4. Integrated lifting pump station; 41. Pump station shaft; 42. Inlet; 43. Outlet; 5. Center positioning point; 6. Inlet direction positioning line; 7. Outlet direction positioning line; 8. Guide positioning structure; 81. Guide limiting point; 9. Temporary limiting component; 91. Fixed seat; 92. Adjusting screw; 93. Pressure regulating block; 10. Inlet pipe; 11. Outlet pipe; 12. Wellhead; 13. Base; 14. Backfill area; 14-1. Backfill area one; 14-2. Backfill area two; 14-3. Backfill area three; 14-4. Backfill area four. Detailed Implementation

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0019] Example 1: Please refer to Figures 1 to 6 This embodiment provides a method for installing an integrated booster pump station in complex environments. This method is used to install an integrated booster pump station 4 in areas with complex terrain, limited space, large pipeline burial depth, or where large-scale slope excavation is not suitable.

[0020] In this embodiment, the working well 1 includes a well wall 111, a wellhead 12, a supporting base plate 3, and a base 13. A protective wall 2 is provided on the inner side of the working well 1, and the protective wall 2 is layered along the depth direction of the working well 1. The integrated lifting pump station 4 includes a pump station shaft 41, on which an inlet 42 and an outlet 43 are provided. The inlet 42 is used to connect to the inlet pipe 10, and the outlet 43 is used to connect to the corresponding outlet pipe.

[0021] During construction, step S1 is performed first to establish a construction control network in the proposed installation area. The construction control network includes control stakes, verification measurement points, and construction leveling points. Control stakes are used to determine the planar position of the working well 1, construction leveling points are used to control the elevation of the wellhead 12, the base 13, and the bearing plate 3, and verification measurement points are used to re-measure the attitude of the pump station during the lowering, connection, and backfilling processes.

[0022] After the construction control network is established, the design center position of the pump station shaft 41 is determined, and the installation orientation of the inlet 42 and outlet 43 is also determined. The installation orientation of the inlet 42 corresponds to the axial direction of the inlet pipe 10, and the installation orientation of the outlet 43 corresponds to the axial direction of the outlet pipe. This ensures that subsequent excavation, hoisting, and pipe connection all have a unified coordinate reference, avoiding misalignment between the pump station pipe outlet and the pipeline interface due to different references used in different construction stages.

[0023] Then, step S2 is executed, and the working well 1 is excavated layer by layer from top to bottom using a reverse construction method. Specifically, a cap beam or first section of retaining wall structure is first constructed near the wellhead 12, and then excavation is carried out downwards under the constraint of the cap beam or first section of retaining wall structure. The excavation depth of each layer does not exceed 1 meter; after the excavation of each layer is completed, the reinforcement is tied, the formwork is installed, and the concrete is poured immediately to form the retaining wall 2 of the corresponding layer. The upper and lower adjacent retaining walls 2 are connected by reserved reinforcement sections, lapped reinforcements, or connecting bars, so that the multiple layers of retaining walls 2 form a continuous stress system along the depth direction.

[0024] By adopting the above-mentioned reverse construction method, temporary and permanent support can be formed in the working well 1 during the excavation process, reducing the exposed height of the well wall 111 and lowering the risk of collapse. Compared with traditional slope excavation, this method does not require the formation of a large-scale slope on the ground, and is therefore suitable for construction in areas such as beside roads, within factory areas, near existing pipelines, or in areas with limited surrounding space.

[0025] After the working well 1 is excavated to the design elevation, step S3 is executed to construct the bearing base plate 3 on the foundation 13. The bearing base plate 3 is used to bear the vertical load of the integrated lifting pump station 4 and provides a plane reference for the positioning of the pump station. After the bearing base plate 3 is constructed and reaches the design strength, a center positioning point 5, an inlet direction positioning line 6, and an outlet direction positioning line 7 are set on the bearing base plate 3.

[0026] The center positioning point 5 is located at the projected position of the design center of the pump station shaft 41. The inlet direction positioning line 6 passes through the center positioning point 5 and points towards the axis of the inlet pipe 10. The outlet direction positioning line 7 passes through the center positioning point 5 and points towards the axis of the outlet pipe. The inlet direction positioning line 6 and the outlet direction positioning line 7 can be formed by ink lines, engraved lines, pre-embedded markers, or repeatable markings. Through this setting, the bearing base plate 3 is not only used to support the pump station, but also for benchmark verification during the lowering and attitude correction process of the pump station.

[0027] Then, step S4 is executed, in which the integrated lifting pump station 4 is hoisted into the working well 1 using hoisting equipment. During the hoisting process, the axis of the pump station well 41 is gradually moved closer to the vertical line where the center positioning point 5 is located, and the inlet 42 is aligned with the inlet positioning line 6, and the outlet 43 is aligned with the outlet positioning line 7.

[0028] To limit lateral sway during the hoisting and lowering of the pump station, a guide positioning structure 8 is installed inside the working shaft 1. The guide positioning structure 8 includes multiple guide limiting points 81. These guide limiting points 81 are arranged at intervals around the circumference of the pump station shaft 41 and face the outer wall of the pump station shaft 41. The guide limiting points 81 can be installed on the retaining wall 2 or the shaft wall 111, or on a temporary support. During the lowering of the pump station shaft 41, the guide limiting points 81 limit or guide the outer wall of the pump station shaft 41, ensuring that the pump station shaft 41 is lowered along the central area of ​​the working shaft 1, thus preventing collision between the pump station shaft 41 and the retaining wall 2.

[0029] After the pump station 4 is lowered onto the supporting base plate 3, preliminary positioning is performed. Preliminary positioning includes aligning the bottom center of the pump station shaft 41 with the center positioning point 5, aligning the inlet 42 with the inlet direction positioning line 6, aligning the outlet 43 with the outlet direction positioning line 7, and making preliminary adjustments to the vertical attitude of the pump station 4 using hoisting equipment.

[0030] Then, step S5 is executed, where temporary limiting components 9 are installed around the pump station 4. The temporary limiting components 9 are used to adjust the position of the pump station shaft 41 after the pump station 4 is initially positioned. At least three temporary limiting components 9 can be arranged around the pump station shaft 41, or one ring can be arranged at the top and bottom of the pump station shaft 41 respectively, so as to simultaneously control the planar position and inclination angle of the pump station 4.

[0031] In this embodiment, the temporary limiting component 9 includes a fixed base 91, an adjusting screw 92, and a top pressure block 93. The fixed base 91 is connected to the protective wall 2 or the well wall 111, the adjusting screw 92 is threadedly connected to the fixed base 91, and the top pressure block 93 is connected to the end of the adjusting screw 92 facing the pump station well shaft 41. When the adjusting screw 92 is rotated, the top pressure block 93 can move toward or away from the pump station well shaft 41, thereby applying a small jacking force to the pump station well shaft 41 or releasing local constraints.

[0032] The attitude monitoring system measures the center position, verticality, and pipe inlet orientation of pump station 4. The attitude monitoring system may include a total station, laser plumb line, level, inclinometer, or distance sensor. During measurement, using the center positioning point 5, the inlet direction positioning line 6, the outlet direction positioning line 7, and the construction benchmark as references, the center deviation of pump station shaft 41, the verticality deviation of pump station shaft 41, the orientation deviation of inlet 42, and the orientation deviation of outlet 43 are obtained respectively.

[0033] When there is a deviation in the center position of the pump station shaft 41, the pump station shaft 41 is slightly translated by adjusting the temporary limiting component 9 in the corresponding direction. When the pump station shaft 41 is tilted, the upper or lower part of the pump station shaft 41 is differentially moved by adjusting the temporary limiting components 9 at different heights, thereby correcting the tilt angle. When there is a deviation in the orientation of the inlet 42 or outlet 43, the pump station 41 is slightly rotated by adjusting the temporary limiting components 9 in different orientations along the tangential direction until the pump station attitude meets the design allowable deviation.

[0034] When performing step S6, connect the inlet pipe 10 and the outlet pipe while the pump station 4 is in a temporary limiting state. Before connection, backfill around the pump station 4 to near the lowest interface height of the corresponding pipes at the inlet 42 and outlet 43, and compact it to form a backfill support layer. This backfill support layer can provide support for the pipe connection area, preventing the pump station shaft 41 from shifting due to localized stress during pipe connection.

[0035] When the inlet pipe 10 is connected to the inlet 42, a flange connection, socket connection, flexible joint connection, or other connection method that meets the engineering design requirements can be used. The outlet pipe can also be connected to the outlet 43 using a corresponding connection method. During the connection process, the temporary limiting component 9 continuously maintains the attitude of the pump station 4, and the attitude monitoring system synchronously or periodically re-measures the positional changes of the pump station 4. When the pipeline connection causes the pump station shaft 41 to shift, it is promptly corrected using the temporary limiting component 9.

[0036] When performing step S7, the annular space between the outer periphery of the pump station shaft 41 and the working well 1 is divided into four backfill zones 14, namely backfill zone one 14-1, backfill zone two 14-2, backfill zone three 14-3, and backfill zone four 14-4. The four backfill zones 14 are distributed around the circumference of the pump station shaft 41, with at least one backfill zone corresponding to the direction of the inlet 42 and at least one backfill zone corresponding to the direction of the outlet 43.

[0037] During backfilling, concrete is first poured around the bottom perimeter of pump station 4 to form a bottom anti-buoyancy backfill layer. The bottom anti-buoyancy backfill layer is used to limit the pump station 4 from floating under the buoyancy of groundwater or construction disturbance. After the bottom anti-buoyancy backfill layer is poured to the design height, the temporary restraints 9 are not removed before the concrete initially sets, so that pump station 4 remains stable during the formation of anti-buoyancy constraints.

[0038] After the bottom anti-buoyancy backfill layer is formed, the upper layer backfill layer is constructed. The upper layer backfill layer can use gravel, graded crushed stone, or other backfill materials permitted by the design. The upper layer backfill layer is constructed in layers, zones, and alternating manner. The thickness of each layer is controlled, and the pump station's attitude is retested after compaction.

[0039] When a re-measurement reveals that the pump station shaft 41 has shifted towards a certain backfill area, the subsequent backfill sequence and amount are adjusted. For example, the single backfill height on the opposite side of the shift can be reduced, or limited supplementary filling and compaction can be carried out on the shifted side to create corrective thrust or support constraint. After each adjustment, the center position, verticality, and pipe orientation of the pump station shaft 41 are re-measured until the deviation returns to the design allowable range.

[0040] Finally, proceed to step S8. After backfilling is completed and the attitude verification of pump station 4 is qualified, remove the temporary limiting component 9 and related support structures. Subsequently, complete the installation of the top components of the pump station, the repair of the wellhead 12, site cleanup, and quality acceptance. The acceptance includes the structural integrity of the working well 1, the construction quality of the retaining wall 2, the elevation of the bearing base plate 3, the center position of the pump station well 41, the verticality of the pump station well 41, the orientation of the inlet 42 and outlet 43, the connection accuracy of the inlet pipe 10 and the outlet pipe, and the compaction of the backfill.

[0041] The construction method in this embodiment, through the coordination of construction control network, reverse support, base plate positioning, guide lowering, temporary limiting, attitude monitoring, pipeline support and zoned backfilling correction, enables the integrated lifting pump station 4 to achieve stable installation in complex environments, reduces large slope excavation, and lowers the risk of rework caused by pump station tilting, pipe misalignment and backfill pressure deviation.

[0042] Example 2, please refer to Figures 1 to 6 This embodiment further defines the guide positioning structure 8 based on embodiment 1.

[0043] The guiding and positioning structure 8 includes at least three guiding limit points 81. Multiple guiding limit points 81 are arranged uniformly or non-uniformly along the circumference of the working well 1. For a circular pump station well 41, the guiding limit points 81 can be set to three, four, six, or eight. When the diameter of the pump station well 41 is large, the hoisting height is high, or the depth of the working well 1 is deep, it is preferable to set six or eight guiding limit points 81 to improve lateral limiting stability during the lowering process.

[0044] The guide limiting point 81 may include a mounting base, an adjusting rod, and a guide head. The mounting base is fixed to the protective wall 2 or the well wall 111, the adjusting rod is connected to the mounting base, and the guide head is located at the end of the adjusting rod near the pump station well shaft 41. The adjusting rod can drive the guide head to move radially to accommodate pump station well shafts 41 of different diameters. The guide head can be a roller, a wear-resistant slider, an arc-shaped nylon block, or a rubber buffer block.

[0045] When the guide head uses a roller, the roller's rotation axis can be set vertically, allowing the pump station shaft 41 to roll and contact the roller during lowering, reducing frictional resistance. When the guide head uses an arc-shaped nylon block or rubber buffer block, the inner side of the guide head is adapted to the outer wall of the pump station shaft 41 to increase the contact area and avoid local pressure damage to the outer wall of the pump station shaft 41.

[0046] The function of the guide positioning structure 8 is not to support the pump station 4 permanently after it is finally in place, but to limit the lateral swing of the pump station shaft 41 and guide it closer to the center positioning point 5 during the lowering process of the pump station 4. After the pump station 4 is lowered to the supporting base plate 3, the guide limiting point 81 can be released, fine-tuned or removed according to the deviation between the pump station 4 and the center positioning point 5, and then the temporary limiting component 9 can be used for precise attitude correction.

[0047] Through this implementation method, the guiding and positioning structure 8 can adapt to integrated lifting pump stations 4 of different diameters, and change the hoisting and lowering process from "free swinging under suspension" to "controlled guided lowering", reducing the risk of well casing colliding with the protective wall 2, pipe orifice deflection and bottom landing point deviation.

[0048] Example 3: Please refer to Figures 1 to 6 The embodiment further defines the temporary limiting component 9 and the attitude correction process based on embodiment 1.

[0049] The temporary limiting component 9 includes a fixed base 91, an adjusting screw 92, and a top pressure block 93. The fixed base 91 can be connected to the protective wall 2 or the well wall 111 via expansion bolts, embedded parts, welded supports, or detachable clamping parts. The adjusting screw 92 is arranged radially along the working well 1 and is threadedly engaged with the fixed base 91. The top pressure block 93 is located at the end of the adjusting screw 92 near the pump station well shaft 41.

[0050] The top pressure block 93 can be provided with an arc-shaped contact surface on the side facing the pump station shaft 41, and the arc-shaped contact surface is adapted to the outer wall of the pump station shaft 41. The top pressure block 93 can also be provided with a rubber pad, nylon pad, or wooden pad to avoid the top pressure block 93 directly damaging the outer wall of the pump station shaft 41.

[0051] In one embodiment, four temporary limiting members 9 are arranged circumferentially along the pump station shaft 41, corresponding to backfill area one 14-1, backfill area two 14-2, backfill area three 14-3, and backfill area four 14-4, respectively. In another embodiment, the temporary limiting members 9 are arranged in two rings, upper and lower, with at least three temporary limiting members 9 in each ring. The upper ring of temporary limiting members 9 is used to control the upper position of the pump station shaft 41, and the lower ring of temporary limiting members 9 is used to control the lower position of the pump station shaft 41. By adjusting the differential of the upper and lower rings of temporary limiting members 9, the inclination angle of the pump station shaft 41 can be corrected.

[0052] The attitude correction process includes center position correction, verticality correction, and nozzle orientation correction.

[0053] During center position correction, first measure the horizontal deviation of the center of the pump station shaft 41 relative to the center positioning point 5. When the pump station shaft 41 shifts in a certain direction, tighten the temporary limiting piece 9 on the shifted side or loosen the temporary limiting piece 9 on the opposite side to cause the pump station shaft 41 to move slightly in the opposite direction.

[0054] During verticality correction, the center positions of the upper and lower parts of the pump station well 41 are measured respectively. When there is a deviation between the upper center and the lower center, the temporary limiting parts 9 of the upper and lower rings are adjusted to cause differential movement of the upper or lower part of the pump station well 41, thereby correcting the inclination angle of the pump station well 41.

[0055] During pipe orifice alignment, the angular deviations of the inlet 42 and outlet 43 relative to the inlet direction positioning line 6 and the outlet direction positioning line 7 are measured. When the orientation of the inlet 42 or outlet 43 deviates, the temporary limiting components 9 of the adjacent orientations are adjusted to cause a slight rotation of the pump station shaft 41 until the orientations of the inlet 42 and outlet 43 meet the design allowable deviation.

[0056] Through this embodiment, the pump station 4 has been controlled within the design-allowed posture before the final backfill, and the temporary limiting component 9 can continuously provide adjustable constraints during the connection and backfilling process, so as to avoid secondary displacement of the pump station 4 in the subsequent construction stage.

[0057] Example 4: Based on Example 1, this example further defines the pipe connection and backfill support layer in step S6.

[0058] After the initial positioning and attitude correction of pump station 4 are completed, the temporary limiting component 9 is not immediately and completely removed; instead, pump station 4 is kept in a temporary limiting state. Subsequently, in the annular space between the outer perimeter of pump station 4 and working well 1, backfilling is carried out to near the lowest interface height of the corresponding pipes at inlet 42 and outlet 43. This height can be lower than or close to the lowest interface of the pipe, depending on the pipe diameter, interface type, and construction space.

[0059] Backfill material can be gravel, graded crushed stone, or low-strength concrete. After backfilling, it is compacted in layers to form a local support layer near the inlet 42 and outlet 43. This support layer is used to support the soil or backfill material around the pipe interface area, reducing local settlement and horizontal thrust generated during pipe connection.

[0060] When connecting the inlet pipe 10 to the inlet 42, first check whether the axis of the inlet pipe 10 is consistent with the positioning line 6 in the direction of the inlet, and then connect the interface. When connecting the outlet pipe to the outlet 43, first check whether the axis of the outlet pipe is consistent with the positioning line 7 in the direction of the outlet, and then connect the interface. During the connection process, if the inlet pipe 10 or the outlet pipe needs to be adjusted slightly, the pipe support or pipe position should be adjusted first, and the alignment should be avoided by forcibly pulling the pump station 4.

[0061] After the pipeline connection is completed, backfilling is carried out around the inlet 42 and outlet 43, and the center position, verticality and pipe orientation of pump station 4 are re-measured. If the re-measurement results exceed the design allowable deviation, correction is made by using temporary limiting components 9; after correction, subsequent zoning backfilling continues.

[0062] In this embodiment, the pipeline connection step and the pump station attitude control step work together to avoid the problem in traditional construction where the pump station is positioned first and then pulled off course by the pipeline during connection.

[0063] Example 5: Please combine Figures 1 to 6 This embodiment further defines the partitioned backfilling method in step S7 based on embodiment 1.

[0064] An annular space is formed between the outer perimeter of the pump station shaft 41 and the working shaft 1. This annular space is divided into four backfill zones 14, namely Backfill Zone 1 14-1, Backfill Zone 2 14-2, Backfill Zone 3 14-3, and Backfill Zone 4 14-4. The four backfill zones 14 can be divided according to quadrants, or adjusted according to the location of the inlet 42, outlet 43, existing pipelines, construction access, or site obstacles.

[0065] Backfill zones 14-1, 14-2, 14-3, and 14-4 do not necessarily have to be exactly the same size, but each backfill zone 14 should be able to form a circumferential balanced support. For locations with inlets 42 and outlets 43, the thickness of each backfill layer can be appropriately reduced, and the frequency of re-measurement can be increased to avoid displacement around the pipe openings due to excessive local backfill pressure.

[0066] During bottom backfilling, concrete is first poured around the bottom perimeter of pump station 4 to form a bottom anti-buoyancy backfill layer. The bottom anti-buoyancy backfill layer must at least cover the outer perimeter of the bottom of pump station shaft 41 and form a common constraint with the bearing base plate 3 or foundation 13. During the pouring of the bottom anti-buoyancy backfill layer, temporary limiting components 9 keep pump station 4 in a corrected posture; after the concrete has initially set and has preliminary constraint capacity, the upper backfilling is then carried out.

[0067] During the upper backfilling process, a layered, zoned, and alternating method is used to form the upper layered backfill layers. Each layer of backfilling can be advanced in a diagonal alternating sequence of backfill zone 14-1, backfill zone 3 14-3, backfill zone 2 14-2, and backfill zone 4 14-4, or it can be advanced in a synchronous manner for relative zones and staggered for adjacent zones. After each layer of backfilling and compaction is completed, the center position of the pump station well shaft 41, verticality, inlet 42 orientation, and outlet 43 orientation are re-measured.

[0068] When the pump station shaft 41 deviates towards backfill area 2 14-2, the amount of backfill in the next layer of backfill area 4 14-4 can be reduced, and limited supplementary filling or enhanced compaction can be carried out in backfill area 2 14-2 to form a reverse correction effect; or the backfill height difference between backfill area 1 14-1 and backfill area 3 14-3 can be adjusted according to the on-site retest data so that the pump station shaft 41 can be gradually restored to the design allowable deviation range.

[0069] It should be noted that the correction is not achieved through a single large-scale backfilling, but rather through small layer thicknesses, multiple retests, and gradual adjustments. A retest should be conducted after each correction to avoid over-correction causing the pump station to shift in the opposite direction.

[0070] In this embodiment, the backfilling process is not only used to fill the voids in the working well 1, but also to form anti-buoyancy constraints, circumferential supports and attitude correction, which can improve the stability of the integrated lifting pump station 4 after installation.

[0071] Example 6: Please refer to Figures 1 to 6 This embodiment, based on Embodiment 1, is applicable to complex environments such as soft strata, high groundwater levels, or adjacent existing buildings and structures.

[0072] When constructing in soft strata, the excavation depth of each layer in step S2 can be further reduced, for example, controlled within the range of 0.5 to 0.8 meters. The retaining wall 2 is constructed immediately after each layer is excavated, and the exposure time of the excavation face is shortened. The reinforcement configuration and concrete strength of the retaining wall 2 can be increased according to geological conditions to enhance the overall rigidity of the working shaft 1.

[0073] When constructing in areas with abundant groundwater, temporary dewatering measures can be set up around or inside the working well 1 to ensure the stability of the foundation 13 and the bearing slab 3 during construction. Before constructing the bearing slab 3, a crushed stone cushion layer, a concrete cushion layer, or an anti-disturbance layer can be set on the foundation 13 to reduce the impact of weak soil on the bearing stability of the bottom of the pump station 4.

[0074] During the lowering and backfilling of pump station 4, the buoyancy of groundwater may cause pump station 4 to float upwards. Therefore, the bottom anti-buoyancy backfill layer should be constructed as soon as possible after the attitude correction of pump station 4 is completed. Before the initial setting of the bottom anti-buoyancy backfill layer, the temporary limiting component 9 should not be removed, and no large-scale construction disturbances that may cause pump station 4 to float or rotate should be carried out.

[0075] For construction environments adjacent to existing pipelines or buildings, the frequency of attitude re-measurement can be increased. For example, re-measurement can be performed after pump station 4 is lowered, after temporary limiting is completed, after inlet pipe 10 is connected, after outlet pipe is connected, and after each layer of backfilling is completed. Through multi-node re-measurement, deviations in the center of pump station 4, tilting, or pipe deflection can be detected in a timely manner, avoiding the accumulation of deviations until the final acceptance stage.

[0076] Through this embodiment, the method of the present invention can be adapted to soft strata, high groundwater levels and areas with sensitive surrounding environments, further demonstrating its applicability in the installation and construction of integrated booster pump stations in complex environments.

[0077] Example 7: Based on Example 1, this example is applicable to areas with limited construction space, such as existing roads, factory access roads, green belt edges, or surrounding areas.

[0078] When constructing in narrow spaces, step S2 employs a reverse-construction method for the working shaft 1, avoiding the large area occupied by traditional slope excavation. The size of the shaft opening 12 of the working shaft 1 can be determined based on the outer diameter of the pump station 4, the installation space of the guide positioning structure 8, the operating space of the temporary limiting component 9, and the safety space for personnel during construction.

[0079] When hoisting pump station 4, the hoisting reference line can be set near the wellhead 12, and the position of the hoisting equipment can be checked through the construction control network. During the lowering of pump station 4, the guide positioning structure 8 restricts the swing of the pump station wellbore 41, so that pump station 4 can be safely lowered within a small wellhead space.

[0080] During the pipeline connection construction, if the inlet pipe 10 or outlet pipe comes from under the existing road, temporary support for the corresponding pipeline can be completed first, and then the connection of the pump station 4 can be carried out. Since the pump station 4 maintains a stable posture under the constraint of the temporary limiting component 9, it is not necessary to move the pump station 4 significantly to adapt to the existing pipeline when connecting the pipeline, thus reducing the risk of disturbance to the existing pipeline.

[0081] During backfilling, the backfilling sequence of the four backfilling zones 14 can be adjusted according to the location of the construction access. For example, if construction machinery cannot enter on one side, low-height layered backfilling can be carried out on the workable side first, and then manual or small equipment can be used to supplement the backfilling on the restricted side. The attitude monitoring system can then be used to check whether the pump station 4 has shifted. Thus, even when there is insufficient working space for construction machinery, the attitude of the pump station 4 can be kept under control.

[0082] Through this embodiment, the method of the present invention can reduce the space requirement for slope protection and improve the installation feasibility of the integrated booster pump station 4 in narrow sites and existing road areas.

[0083] Implementation principle of the embodiments of this application First, the working well 1, pump station shaft 41, inlet 42, outlet 43, and pipeline interfaces are incorporated into the same measurement system through a construction control network. Second, the construction of the reverse-engineered working well 1 and the layered retaining wall 2 enables the excavation process itself to have support capabilities, reducing construction risks in complex environments. Third, the center positioning point 5, the inlet direction positioning line 6, and the outlet direction positioning line 7 on the bearing base plate 3 provide verifiable benchmarks for the center position and pipe orientation after the pump station 4 is lowered. Then, the hoisting swing is limited by the guide positioning structure 8, three-dimensional attitude fine-tuning is performed by the temporary limiting component 9, and continuous re-measurement is conducted through the attitude monitoring system. Finally, the pipe connection area support layer and zoned backfilling correction ensure that the pipe connection and backfilling no longer become uncontrollable links that cause secondary displacement of the pump station 4.

Claims

1. A method for installing and constructing an integrated booster pump station in a complex environment, characterized in that, Includes the following steps: S1. Establish a construction control network in the proposed installation area, including control piles, verification measurement points and construction leveling points, to determine the center position of the pump station well, the installation orientation of the inlet and outlet and the hoisting reference line, and to ensure that the coordinates of each subsequent construction stage are consistent. S2. Excavate layer by layer from top to bottom, and construct the cap beam or the first section of the retaining wall structure and the steel reinforcement formwork simultaneously. After each layer is completed, pour concrete to form a support structure, so that the well wall is stable and a continuous stress system is formed layer by layer during the excavation process. S3. Lay a bearing base plate at the bottom of the working well, and set a center positioning point and inlet / outlet direction positioning line on the base plate to form a verifiable planar installation benchmark. S4. Use hoisting equipment to lower the entire pump station into the working well, and make preliminary adjustments to the center position, verticality, and inlet / outlet direction of the pump station using guiding devices and positioning benchmarks to ensure that the pump station well shaft is aligned with the pipeline network. S5. Through temporary limiters and attitude monitoring system, measure the center position, verticality and pipe orifice orientation deviation of the pump station in real time, and perform micro-translation, tilt correction or angle fine adjustment to keep the deviation within the design allowable range. S6. Under the temporary limit state of the pump station, connect the inlet pipe and the outlet pipe, and set up a backfill support layer around the pipe connection area to further reduce additional offset and stress concentration during the connection process. S7. Divide the space around the pump station into at least four backfill zones. Use concrete, gravel, or a mixture of both for backfilling in layers. The bottom backfill forms an anti-buoyancy constraint, while the upper layers control the backfill density and the pump station tilt. After each layer of backfilling is completed, re-measure the pump station attitude. If the deviation is found to be out of range, adjust the backfilling sequence and amount of subsequent zones to correct the deviation. S8. After backfilling is completed and the pump station's posture is verified as qualified, remove all temporary limiting and supporting structures, complete the installation of the pump station's top components, site cleanup, and quality acceptance, and ensure that the overall position, posture, and pipe orientation of the pump station meet the design requirements after construction.

2. The installation and construction method of an integrated booster pump station in a complex environment as described in claim 1, characterized in that, In step S2, the excavation depth of each layer shall not exceed 1 meter. After excavation, the retaining wall construction and steel reinforcement formwork installation shall be carried out immediately to ensure the safety and stability of the construction process. The upper and lower retaining walls shall be connected by reserved steel reinforcement sections to achieve continuous structural stress.

3. The installation and construction method of an integrated booster pump station in a complex environment as described in claim 1, characterized in that, In step S3, the positioning reference includes the center point of the bearing base plate and the positioning lines of the inlet and outlet directions. All positioning points and direction lines can be used for hoisting verification and attitude correction, forming a complete and traceable installation control system.

4. The installation and construction method of an integrated booster pump station in a complex environment as described in claim 1, characterized in that, In step S4, the guiding device includes at least three circumferentially spaced guiding limit points to limit the lateral swing of the pump station and guide the pump station to be lowered along the center line, while being adjustable to accommodate different pump station sizes.

5. The installation and construction method of an integrated booster pump station in a complex environment as described in claim 1, characterized in that, In step S5, temporary limiting components are arranged at intervals along the circumference of the pump station. The translation or tilt angle of the pump station can be adjusted slightly according to the retest results to achieve precise three-dimensional attitude control. The attitude monitoring system records deviation data in real time for backfilling and acceptance reference.

6. The installation and construction method of an integrated booster pump station in a complex environment as described in claim 1, characterized in that, In step S5, attitude correction includes center position correction, verticality correction and inlet / outlet orientation correction. These three are incorporated into a unified correction process to ensure that the pump station is fully aligned with the reference after the pumping station is lowered.

7. The installation and construction method of an integrated booster pump station in a complex environment as described in claim 1, characterized in that, In step S6, before connecting the inlet and outlet water pipes, the area around the pump station is backfilled to the lowest interface height of the pipes and compacted to form a support layer to limit the pump station's displacement during the connection process.

8. The installation and construction method of an integrated booster pump station in a complex environment as described in claim 1, characterized in that, In step S7, the zonal backfilling includes bottom anti-buoyancy backfilling and upper layered backfilling. The upper backfilling adopts a layered, quadrant-based, and alternating sequence. After each layer of backfilling, the pump station center position, verticality, and pipe inlet orientation are re-measured. If the deviation exceeds the preset value, the backfilling sequence or amount is adjusted to correct the deviation.

9. The installation and construction method of an integrated booster pump station in a complex environment as described in claim 1, characterized in that, In step S7, the bottom anti-buoyancy backfill uses concrete up to the design height, and the pump station is temporarily limited before initial setting to form anti-buoyancy support; the upper layer backfill uses gravel or graded materials to limit the bias pressure and enhance the circumferential support of the wellbore.

10. The installation and construction method of an integrated booster pump station in a complex environment as described in claim 1, characterized in that, In step S8, the quality acceptance includes the structural integrity of the working well, the center position of the pump station well, the verticality, the direction of the inlet and outlet, the accuracy of the pipe connection, and the compaction of the backfill. Only after all the acceptance indicators meet the design requirements can the temporary limiting and support structures be removed and the final installation be completed.

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