Simple supporting method for excavation of water supply pipe foundation trench

Abstract

The simple supporting method for excavation of the water supply pipe foundation trench comprises the following steps that a geological exploration report is researched, and the water level height of underground water is determined; pipeline groove excavation lines are measured and arranged, construction machinery excavates the lines on the two sides of a pipeline, and a plurality of pine piles are driven in; simple forming support is carried out in the channel by adding a simple support device; segmented excavation is conducted after segmented supporting is conducted, and after segmented pipelines are laid, a simple supporting device is driven to support a next pipe groove, and backfilling is conducted on a previous pipeline; after backfilling of each section of pipeline groove is completed, the simple supporting device is connected with a pine pile to be pulled out, and supporting construction of the next section of pipeline groove is conducted; the method has the beneficial effects that the problem that pipe trench grooving and pipeline mounting construction cannot be normally carried out due to water seepage and collapse of the bottom of the water supply pipeline caused by high underground water level is effectively solved, the problem that the stability of a pipeline trench excavation slope cannot be enhanced is solved, the construction safety and progress are guaranteed, the construction efficiency is improved, and the measure investment is reduced.

Description

Technical Field

[0001] This invention relates to the field of foundation pit support technology, and more specifically to a simplified support method for excavating water supply pipe foundation trenches. Background Technology

[0002] In some areas, the construction site is entirely composed of saturated silty clay, with groundwater of the phreatic type, mainly found in various cohesive soil layers. Groundwater dynamics are seasonally influenced by meteorological, hydrological, and irrigation factors, with water level fluctuations of approximately 1-2 meters. The empirical permeability coefficient of the cohesive soil layer is 0.01 m / d. Discharge is primarily through evaporation and surface runoff from surrounding areas. The initial phreatic water level is approximately 1.00-3.80 meters below the natural ground surface, while the stable water level is approximately 0.70-3.50 meters below the natural ground surface. Water supply pipeline construction requires excavation 2.25 meters below the original ground level to reach the designed trench bottom elevation, resulting in the trench bottom being located within the stable water level layer. During excavation, continuous seepage occurred on the trench slopes. Furthermore, drainage ditches are located adjacent to both sides of the water supply pipeline. Due to the limited working space, the slope of the pipeline trench cannot be sloped during excavation. Excavating at a 1:0.5 slope carries the risk of instability and collapse, so support and protection measures must be taken; otherwise, normal construction cannot be guaranteed. A method for zonal excavation and support of foundation pits based on protecting the safety of existing pipelines, similar to the one described in patent number CN202310959091.0, is applicable to the field of foundation pit support. This method includes detailed surveying, pipeline marking and monitoring protection measures, development of zonal excavation plans, selection of support forms, commencement of excavation, dynamic feedback of monitoring data, and final inspection. The zonal excavation and support method for foundation pits based on protecting the safety of existing pipelines proposed in this invention has advantages such as wide applicability, precise pipeline protection, and simple construction. The existing method has drawbacks. It cannot effectively solve the problem of water seepage and collapse at the bottom of the water supply pipeline trench caused by high groundwater level, which prevents normal trenching and pipeline installation. It cannot enhance the stability of the trench excavation slope, guarantee construction safety and progress, improve construction efficiency, or reduce the investment of measures. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art of effectively solving the problem of water seepage and collapse at the bottom of water supply pipeline trenches caused by high groundwater levels, which prevents normal trenching and pipeline installation, and to solve the problem of not being able to strengthen the stability of the trench excavation slope, ensure construction safety and progress, improve construction efficiency, and reduce the investment of measures.

[0004] A simplified support method for excavating water supply pipe foundation trenches according to the present invention includes the following steps: S1: Study the geological survey report to determine the groundwater level. S2: Conduct pipeline trench excavation line surveying and setting out. Construction machinery excavates the line on both sides of the pipeline and drives in multiple pine stakes. S3: Simple forming support is provided in the track groove by adding simple support devices; S4: After segmented support and segmented excavation, after segmented pipeline laying, drive the simple support device to support the next pipe trench and backfill the previous pipeline. S5: After the backfilling of each section of the pipeline trench is completed, connect the simple support device to the pine stakes to be pulled out, and carry out the support construction of the next section of the pipeline trench.

[0005] Preferably, the simple support device includes a support frame, and a hydraulically driven flipper is slidably inserted into the side end of the support frame. The hydraulically driven flipper is supported and fixed by multiple deeply buried ground nails. The support frame is connected to pine piles through a pine pile pull-out connector.

[0006] Preferably, the supporting outer frame includes a drive spline bushing, which is fixed to the side end of the supporting central frame. Two outer frames for inserting pine stake pull-out connectors are fixed to the front and rear sides of the supporting central frame respectively. Multiple support plate spline gear shafts are rotatably arranged on both the front and rear sides of the supporting central frame, and the tooth heads of the support plate spline gear shafts extend to the outer end of the supporting central frame. The combined folding support plate is symmetrically fixed on the multiple support plate spline gear shafts in the front, rear, top, and bottom.

[0007] Preferably, the combined folding support plate includes two support plates that are hinged to each other, with the support plate near the support center frame fixed on the splined gear shaft of the support plate.

[0008] Preferably, both sides of the supporting outer frame are fixed with multiple side adjusting locks for locking the splined gear shaft of the supporting plate. The side adjusting lock includes an extension frame, which is fixed to the side end of the supporting outer frame. The side end of the extension frame is connected to an adjusting bolt through a threaded connection. The adjusting bolt is rotatably connected to a connecting plate. The connecting plate slides on the extension frame. Two locking toothed sleeves are fixed on the connecting plate and inserted into the extension frame. The locking toothed sleeves are correspondingly locked and inserted into the splined gear shaft of the supporting plate.

[0009] Preferably, the hydraulically driven tilting device includes two hydraulic motor support seats, a hydraulic motor, and a drive spline shaft. The two hydraulic motor support seats are symmetrically arranged. A hydraulic motor is fixed on one of the hydraulic motor support seats. The transmission shaft of the hydraulic motor is connected to the drive spline shaft through a coupling. The drive spline shaft is rotatably connected to a bearing seat on the other hydraulic motor support seat. The drive spline shaft is slidably inserted into the drive spline shaft sleeve. Deeply embedded ground nails are inserted into multiple T-shaped holes on the hydraulic motor support seat.

[0010] Preferably, the deep-buried ground stake includes a drilling screw and an internal threaded rod. The drilling screw is inserted into a T-shaped hole on the hydraulic motor support. The internal threaded rod is rotatably installed in the insertion hole inside the drilling screw. Multiple gripping claws are hinged to the drilling screw via a short shaft. The internal threaded rod is threadedly connected to a hinged threaded sleeve inside the drilling screw. The hinged threaded sleeve is longitudinally slidable inside the drilling screw. The inner ends of multiple hinged rods are hinged to the hinged threaded sleeve via a short shaft. The outer ends of the hinged rods are hinged to the gripping claws via a short shaft.

[0011] Preferably, the surface of the upper end of the drilling screw is provided with a cross groove, and the surface of the upper end of the inner insert screw is provided with a cross-shaped groove.

[0012] Preferably, the upper surface of the outer end of the pine stake has multiple pine stake grooves arranged side by side; the pine stake pull-out connector includes a movable connecting claw and a fixed connecting claw, which are connected by bolts; the movable connecting claw and the fixed connecting claw are symmetrically inserted into the multiple pine stake grooves arranged side by side.

[0013] Preferably, the fixed connecting claw is fixed to the outer end of the connecting frame, and the inner end of the connecting frame is laterally limited and slidably provided with an extension L socket. The extension L socket is inserted into the outer frame, and an extension adjustment bolt is rotatably provided on the extension L socket. The extension adjustment bolt is connected to the connecting frame by threaded engagement.

[0014] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in this application.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a flowchart illustrating the present invention; Figure 2 This is a schematic diagram of the first orientation of the simplified support device of the present invention; Figure 3 This is a schematic diagram of the second-direction structure of the simplified support device of the present invention; Figure 4 This is a schematic diagram of the connection structure of the supporting outer frame of the present invention; Figure 5 This is a schematic diagram of the structure of the hydraulically driven tilting device of the present invention; Figure 6This is a schematic diagram of the supporting outer frame of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the supporting outer frame of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the side-adjustable locking device of the present invention; Figure 9 This is a schematic diagram of the combined folding support plate of the present invention; Figure 10 This is a schematic diagram of the supporting outer frame and pine stakes of the present invention; Figure 11 This is a schematic diagram of the pine wood pile of the present invention; Figure 12 This is a schematic diagram of the pine stake pull-out connector of the present invention. Figure 1 ; Figure 13 This is a schematic diagram of the pine stake pull-out connector of the present invention. Figure 2 ; Figure 14 This is a schematic diagram of the structure of the hydraulic motor support base of the present invention; Figure 15 This is a schematic diagram of the structure of the deep-buried ground nail of the present invention. Figure 1 ; Figure 16 This is a schematic diagram of the structure of the deep-buried ground nail of the present invention. Figure 2 .

[0017] In the diagram: 1. Support frame; 2. Hydraulic drive tilter; 3. Pine stake; 4. Pine stake pull-out connector; 5. Deep-buried ground nail; 6. Side adjustment locking device; 7. Hydraulic motor support seat; 8. Hydraulic motor; 9. Drive spline shaft; 10. Drive spline bushing; 11. Support center frame; 12. Outer frame; 13. Combined folding support plate; 14. Support plate spline gear shaft; 15. Locking gear sleeve; 16. Connecting plate; 17. Adjusting bolt; 18. Extension frame; 19. Pine stake groove; 20. Live connecting groove claw; 21. Fixed connecting groove claw; 22. Connecting frame; 23. Extension L socket; 24. Extension adjusting bolt; 25. Drilling screw; 26. Internal screw rod; 27. Gripping claw; 28. Hinge threaded sleeve; 29. ​​Hinge rod. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In the description of this application, it should be understood that the terms "middle," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] Example 1: like Figure 1 — Figure 3 As shown, a simple support method for excavating a water supply pipe foundation trench includes the following steps: S1: Study the geological survey report to determine the groundwater level. S2: Conduct pipeline trench excavation line surveying and setting out, construction machinery excavates the line on both sides of the pipeline, and drives in multiple pine stakes 3; S3: Simple forming support is provided in the track groove by adding simple support devices; S4: After segmented support and segmented excavation, after segmented pipeline laying, drive the simple support device to support the next pipe trench and backfill the previous pipeline. S5: After the backfilling of each section of the pipeline trench is completed, connect the simple support device to the pine stake 3 to be pulled out, and carry out the support construction of the next section of the pipeline trench.

[0023] The working principle and beneficial effects of this embodiment are as follows: After determining the location, the groundwater level is first determined by studying the geological survey report; then, the pipeline trench excavation line is surveyed, and pine support piles are driven into the excavation line on both sides of the pipeline using construction machinery or pile drivers. The pine piles are 100mm in diameter, 2-4m in length, and driven into the soil to a depth of 2m; then, temporary support is provided in sections using simple support devices, followed by section excavation and section pipeline laying. The simple support devices are then used to support the next trench, and the previous pipeline is backfilled; each trench excavation and backfilling is divided into a work section based on the actual situation. After the pipeline is laid, some pine piles are pulled out using simple support devices for easy removal; at the same time, the simple support devices are flipped to add support to the next trench, and the support construction of the next section of the trench is carried out. After each section of the trench is backfilled, the pine piles are completely pulled out to ensure continuous construction and the recycling of pine piles; This method enables normal construction to proceed even when the working area is limited and slope excavation is not feasible for pipeline trench construction. It utilizes simple measures to ensure safe and smooth construction by driving in pine piles for simple support. This method also improves the stability of the soil on both sides of the trench, preventing soil instability and collapse, ensuring the safety of the trench slope, providing the necessary working conditions for smooth pipeline construction, and guaranteeing the safety of workers during construction. It improves the construction efficiency of trench slope treatment and reduces construction costs; it uses driven pine piles for simple support, which does not require special mechanical equipment, and the construction speed is fast and the cost is low, which fully meets the requirements of safe and efficient construction of pipeline trenches in high water level construction environments. Process flow: trench slope measurement and setting out -- driving in pine stakes -- trench excavation and pipeline construction -- trench backfilling -- removing pine stakes and transferring them to the next construction section.

[0024] Example 2: like Figure 1 — Figure 16 As shown, a simple support method for excavating a water supply pipe trench is described. The simple support device includes a support frame 1, and a hydraulically driven flipper 2 is slidably inserted into the side end of the support frame 1. The hydraulically driven flipper 2 is supported and fixed by multiple deeply buried ground nails 5. The support frame 1 is connected to pine piles 3 through a pine pile pull-out connector 4.

[0025] The working principle and beneficial effects of this embodiment are as follows: By using a simple support device on the pipeline trench site, continuous flipping support is convenient. At the same time, by using the pine pile pull-out connector 4 to connect the corresponding pine pile 3, it is convenient to pre-pull out the deeply buried pine pile 3 together, making it convenient to flip it over as a whole. It can be used according to the actual situation of the pine pile. The shorter ones can be flipped over directly, while the longer ones are suitable for use with large mechanical equipment on site. The hydraulically driven tilter 2 is supported and fixed between two designated pipe trenches by multiple deeply embedded ground nails 5. By driving the hydraulically driven tilter 2, the support frame 1 is tilted, thus allowing the support frame 1 from the previous pipe trench to be used in the next pipe trench. Then, depending on the actual situation, the pine pile pull-out connector 4 on the support frame 1 is used to connect the pine piles 3. During the tilting process, the pine piles 3 on the side can also be tilted and pulled out for the support of the next pipe trench. This effectively reduces the use of large machinery on site, effectively solves the problem of water seepage and collapse at the bottom of the water supply pipeline trench caused by high groundwater level, which prevents normal trenching and pipeline installation, solves the problem of not being able to strengthen the stability of the pipeline trench excavation slope, ensures construction safety and progress, improves construction efficiency, and reduces the investment of measures.

[0026] Example 3: like Figure 1 — Figure 16 As shown, a simple support method for excavating a water supply pipe trench includes a support outer frame 1 comprising a drive spline bushing 10 fixed to the side of a support center frame 11. Two outer frames 12 for inserting pine pile pull-out connectors 4 are fixed to the front and rear sides of the support center frame 11, respectively. Multiple support plate spline gear shafts 14 are rotatably mounted on both the front and rear sides of the support center frame 11, with the tooth heads of the support plate spline gear shafts 14 extending to the outer end of the support center frame 11. A combined folding support plate 13 is symmetrically fixed to the multiple support plate spline gear shafts 14.

[0027] The working principle and beneficial effects of this embodiment are as follows: the hydraulic drive flipper 2 is connected to the drive spline bushing 10 on the support frame 1, which facilitates the connection and use of the flipping drive. Two outer frames 12 are fixed on the front and rear sides of the supporting center frame 11 for inserting the pine stake pull-out connector 4. The two outer frames 12 facilitate the connection of the pine stake pull-out connector 4 to pull out the pine stake 3. Multiple support plate spline gear shafts 14 are rotatably provided on both the front and rear sides of the support center frame 11. The tooth heads of the support plate spline gear shafts 14 extend to the outer end of the support center frame 11, which facilitates the rotational connection of the combined folding support plate 13 to the support center frame 11 for support. The tooth heads of the support plate spline gear shafts 14 extending to the outer end of the support center frame 11 facilitate locking. The combined folding support plates 13 are symmetrically fixed to multiple support plate splined shafts 14 from front to back and top to bottom. Usually, four combined folding support plates 13 are sufficient to facilitate support of the pipe trench after flipping. At the same time, the upper part can also support the side soil, which is convenient for continuous use and switching when flipping.

[0028] Example 4: like Figure 1 — Figure 16 As shown, a simple support method for excavating a water supply pipe trench is described. The combined folding support plate 13 includes two support plates that are hinged to each other. The support plate near the support center frame 11 is fixed on the splined gear shaft 14 of the support plate.

[0029] The working principle and beneficial effects of this embodiment are as follows: Because the combined folding support plate 13 includes two mutually hinged support plates, it is convenient to fold and use. When it is under the pipe trench, the folded combined folding support plate 13 can support the side and bottom ends simultaneously until the pipe is added and then removed. The upper end is convenient to flip and switch, and can support the soil accumulated on the side end at the upper end. Therefore, it is suitable for use in environments where switching and flipping are required. Combined with the actual segmented support and segmented excavation, it can be used continuously and automatically to adapt to the changing environment. The support plate is fixed to the splined shaft 14 of the support plate near the support center frame 11, which facilitates flipping and folding to form the support plate 13 and lock it in place, preventing loose support from being insufficient.

[0030] Example 5: like Figure 1 — Figure 16 As shown, a simple support method for excavating a water supply pipe foundation trench is provided. Multiple side-adjusting locking devices 6 are fixed on both sides of the supporting outer frame 1 for locking the splined gear shaft 14 of the support plate. Each side-adjusting locking device 6 includes an extension frame 18, which is fixed to the side end of the supporting outer frame 1. The side end of the extension frame 18 is connected to an adjusting bolt 17 via a threaded connection. The adjusting bolt 17 is rotatably connected to a connecting plate 16, which slides on the extension frame 18. Two locking toothed sleeves 15 are fixed on the connecting plate 16 and inserted into the extension frame 18. The locking toothed sleeves 15 are correspondingly locked and inserted into the splined gear shaft 14 of the support plate.

[0031] The working principle and beneficial effects of this embodiment are as follows: By fixing multiple side adjustment locking devices 6 for locking the spline gear shaft 14 of the support plate on both sides of the support frame 1, the side adjustment locking devices 6 at the corresponding positions are rotated and adjusted to lock the combined folded support plate 13 after it is formed, so as to prevent the support effect from being loose. By rotating the threaded adjusting bolt 17 on the extension frame 18, the connecting plate 16 drives the two locking toothed sleeves 15 to slide laterally on the extension frame 18 and insert them into the splined gear shaft 14 of the support plate, thereby locking the support plate of one side of the combined folding support plate 13; thus achieving the effect of fixed position support. The support plate of the other combined folding support plate 13 at the lower end is tilted at an angle through a hinge to provide live-joint support for the pipe trench at the lower end, making it easy to remove after adding pipes.

[0032] Example 6: like Figure 1 — Figure 16 As shown, a simple support method for excavating a water supply pipe trench is described. The hydraulically driven tilting device 2 includes two hydraulic motor support seats 7, a hydraulic motor 8, and a drive spline shaft 9. The two hydraulic motor support seats 7 are symmetrically arranged. The hydraulic motor 8 is fixed on one of the hydraulic motor support seats 7. The transmission shaft of the hydraulic motor 8 is connected to the drive spline shaft 9 through a coupling. The drive spline shaft 9 is rotatably connected to a bearing seat on the other hydraulic motor support seat 7. The drive spline shaft 9 is slidably inserted into the drive spline bushing 10. Deeply buried ground nails 5 are inserted into multiple T-shaped holes on the hydraulic motor support seat 7.

[0033] The working principle and beneficial effects of this embodiment are as follows: By fixing two hydraulic motor support seats 7 between two pipe trenches that are convenient for fixed support, and locking them at a specified position by using deeply embedded ground nails 5; by using a hydraulic motor 8 and a drive spline shaft 9, the drive spline shaft 9 is slidably inserted into the drive spline bushing 10 to complete the connection with the support outer frame 1, and the support outer frame 1 can be flipped for use by driving the hydraulic motor 8; because the drive spline shaft 9 and the drive spline bushing 10 are relatively slidably inserted, it is convenient to extend the position of the two hydraulic motor support seats 7, thereby lengthening the fixed position, making it easier to find a better position, and preventing the fixed position from affecting the support of the pipe trench.

[0034] Example 7: like Figure 1 — Figure 16 As shown, a simple support method for excavating a water supply pipe trench is described. The deeply buried ground nail 5 includes a drilling screw 25 and an internal threaded rod 26. The drilling screw 25 is inserted into a T-shaped hole on a hydraulic motor support 7. The internal threaded rod 26 is rotatably installed in the insertion hole inside the drilling screw 25. Multiple gripping claws 27 are hinged to the drilling screw 25 via a short shaft. The internal threaded rod 26 is threadedly connected to a hinged threaded sleeve 28 inside the drilling screw 25. The hinged threaded sleeve 28 is longitudinally slidably installed inside the drilling screw 25. The inner ends of multiple hinged rods 29 are hinged to the hinged threaded sleeve 28 via a short shaft. The outer ends of the hinged rods 29 are hinged to the gripping claws 27 via a short shaft.

[0035] The working principle and beneficial effects of this embodiment are as follows: By inserting the drilling screw 25 into the T-shaped hole of the hydraulic motor support 7, the drilling screw 25 is driven to be inserted into the ground by the extrusion of the drill bit, thereby fixing the hydraulic motor support 7 in a designated position. Because the drawings around the pipe trench are easy to loosen, the drill bit drives the inner screw 26 to rotate inside the drilling screw 25. The inner screw 26 is threadedly connected to the hinge thread sleeve 28 inside the drilling screw 25. Because the hinge thread sleeve 28 is hinged to the gripping claw 27 by the short shaft at the outer end of multiple hinge rods 29, and multiple gripping claws 27 are hinged to the drilling screw 25 by the short shaft, they are restrained. Therefore, the upper end of the gripping claw 27 is driven outward by the force, and is squeezed outward and compressed into the soil for insertion and locking. The insertion of multiple gripping claws 27 into the soil completes a more stable support and locking. At the same time, it is easy to remove by reverse rotation. Multiple slots are provided on the hinge rod 29 to prevent excessive soil and stones at the angle from affecting recycling.

[0036] Example 8: like Figure 1 — Figure 16 As shown, a simple support method for excavating a water supply pipe foundation trench is provided, wherein the surface of the upper end of the drilling screw 25 is provided with a cross groove, and the surface of the upper end of the inner insert screw 26 is provided with a cross flower groove.

[0037] The working principle and beneficial effects of this embodiment are as follows: The surface of the upper end of the drilling screw 25 is provided with a cross groove, which facilitates the connection of the drill bit and the fixing of the ground insertion; then a smaller drill bit is used to insert into the cross groove provided on the surface of the upper end of the drive inner screw 26, so that the inner screw 26 can rotate and drive the opening and retraction of the gripper 27, thereby completing a more stable fixation of the foot in the soil, thus preventing more stable fixation under the soft soil of the support, and facilitating the flipping drive and pulling out of the pine pile for use.

[0038] Example 9: like Figure 1 — Figure 16 As shown, a simple support method for excavating a water supply pipe foundation trench is provided. The upper surface of the outer end of the pine pile 3 is provided with multiple pine pile grooves 19 arranged side by side. The pine pile pull-out connector 4 includes a movable connecting claw 20 and a fixed connecting claw 21, which are connected by bolts. The movable connecting claw 20 and the fixed connecting claw 21 are symmetrically inserted into the multiple pine pile grooves 19 arranged side by side.

[0039] The working principle and beneficial effects of this embodiment are as follows: When the length of the pine stake 3 to be used is appropriate and not particularly long, multiple pine stake grooves 19 are arranged side by side on the upper surface of the outer end of the pine stake 3 to facilitate the gripping and pulling. When it is necessary to flip and pull them up together, the movable connecting claw 20 and the fixed connecting claw 21 are symmetrically inserted into the multiple pine stake grooves 19 arranged side by side, and the movable connecting claw 20 and the fixed connecting claw 21 are connected by bolts. The pine stake 3 and the supporting outer frame 1 are connected by the pine stake pulling connector 4, and then multiple pine stakes 3 are pulled up together by the hydraulic motor 8. After disassembly, the pine stake 3 is pulled out.

[0040] Example 10: like Figure 1 — Figure 16 As shown, a simple support method for excavating a water supply pipe foundation trench is provided. The fixed connecting claw 21 is fixed to the outer end of the connecting frame 22. The inner end of the connecting frame 22 is laterally limited and slidably provided with an extension L socket 23. The extension L socket 23 is inserted into the outer frame 12. An extension adjusting bolt 24 is rotatably provided on the extension L socket 23. The extension adjusting bolt 24 is connected to the connecting frame 22 by threaded engagement.

[0041] The working principle and beneficial effects of this embodiment are as follows: Because the fixed connecting claw 21 is fixed to the outer end of the connecting frame 22, the inner end of the connecting frame 22 is laterally limited and slidably provided with an extension L socket 23, so that the extension L socket 23 is inserted into the outer frame 12, thereby completing the connection between the pine stake 3 and the supporting outer frame 1. An extension adjustment bolt 24 is provided on the extension L socket 23. The extension adjustment bolt 24 is connected to the connecting frame 22 by threaded connection. By rotating the extension adjustment bolt 24, the extension distance of the extension L socket 23 can be adjusted. This allows for adjustment of the length of the pine stake pull-out connector 4 according to the actual situation, making it convenient to connect pine stakes 3 in different positions for adaptation and adjustment.

[0042] The above description is not intended to limit the present invention, nor is the present invention limited to the examples given above. Any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. A simplified support method for excavating a water supply pipe foundation trench, characterized in that, Includes the following steps: S1: Study the geological survey report to determine the groundwater level. S2: Conduct pipeline trench excavation line surveying and setting out, construction machinery excavates the line on both sides of the pipeline and drives in multiple pine stakes (3). S3: Simple forming support is provided in the track groove by adding simple support devices; S4: After segmented support and segmented excavation, after segmented pipeline laying, drive the simple support device to support the next pipe trench and backfill the previous pipeline. S5: After the backfilling of each section of the pipeline trench is completed, connect the simple support device to the pine piles (3) to be pulled out, and carry out the support construction of the next section of the pipeline trench.

2. The simplified support method for excavation of water supply pipe foundation trenches according to claim 1, characterized in that: The simple support device includes a support frame (1), and a hydraulically driven flipper (2) is slidably inserted into the side end of the support frame (1). The hydraulically driven flipper (2) is supported and fixed by multiple deeply buried ground nails (5). The support frame (1) is connected to pine piles (3) through pine pile pull-out connectors (4).

3. A simplified support method for excavating a water supply pipe foundation trench according to claim 2, characterized in that: The supporting outer frame (1) includes a drive spline bushing (10), which is fixed to the side of the supporting center frame (11). The front and rear sides of the supporting center frame (11) are respectively fixed with two outer frames (12) for inserting the pine stake pull-out connector (4). Multiple support plate spline gear shafts (14) are rotatably arranged on both the front and rear sides of the supporting center frame (11). The tooth heads of the support plate spline gear shafts (14) extend to the outer end of the supporting center frame (11). The combined folding support plate (13) is symmetrically fixed on the multiple support plate spline gear shafts (14) in the front, back, top, and bottom.

4. A simplified support method for excavating a water supply pipe foundation trench according to claim 3, characterized in that: The combined folding support plate (13) includes two support plates that are hinged to each other, with the support plate near the support center frame (11) fixed on the support plate spline gear shaft (14).

5. A simplified support method for excavating a water supply pipe trench according to claim 4, characterized in that: Both sides of the support frame (1) are fixed with multiple side adjustment locking devices (6) for locking the spline gear shaft (14) of the support plate. The side adjustment locking device (6) includes an extension frame (18). The extension frame (18) is fixed to the side end of the support frame (1). The side end of the extension frame (18) is connected to the adjustment bolt (17) by threaded connection. The adjustment bolt (17) is rotatably connected to the connecting plate (16). The connecting plate (16) slides on the extension frame (18) for a limited position. Two locking tooth sleeves (15) are fixed on the connecting plate (16) and inserted into the extension frame (18). The locking tooth sleeves (15) are correspondingly locked and inserted into the spline gear shaft (14) of the support plate.

6. A simplified support method for excavating a water supply pipe trench according to claim 3, characterized in that: The hydraulically driven tilter (2) includes two hydraulic motor support seats (7), a hydraulic motor (8) and a drive spline shaft (9). The two hydraulic motor support seats (7) are symmetrically arranged. A hydraulic motor (8) is fixed on one of the hydraulic motor support seats (7). The transmission shaft of the hydraulic motor (8) is connected to the drive spline shaft (9) through a coupling. The drive spline shaft (9) is rotatably connected to the bearing seat on the other hydraulic motor support seat (7). The drive spline shaft (9) is slidably inserted into the drive spline bushing (10). Deeply buried ground nails (5) are inserted into multiple T-shaped holes on the hydraulic motor support seat (7).

7. A simplified support method for excavating a water supply pipe trench according to claim 6, characterized in that: The deep-buried ground nail (5) includes a drilling screw (25) and an internal screw rod (26). The drilling screw (25) is inserted into a T-shaped hole on the hydraulic motor support seat (7). The internal hole of the drilling screw (25) is rotatably provided with the internal screw rod (26). Multiple gripping claws (27) are hinged to the drilling screw (25) through a short shaft. The internal screw rod (26) is threaded in the drilling screw (25) and connected to a hinged threaded sleeve (28). The hinged threaded sleeve (28) is longitudinally slidably disposed in the drilling screw (25). The inner ends of multiple hinged rods (29) are hinged to the hinged threaded sleeve (28) through a short shaft. The outer ends of the hinged rods (29) are hinged to the gripping claws (27) through a short shaft.

8. A simplified support method for excavating a water supply pipe trench according to claim 7, characterized in that: The surface of the upper end of the drilling screw (25) is provided with a cross groove, and the surface of the upper end of the inner screw (26) is provided with a cross flower groove.

9. A simplified support method for excavating a water supply pipe foundation trench according to claim 3, characterized in that: The upper surface of the outer end of the pine stake (3) is provided with a plurality of pine stake grooves (19) arranged side by side; the pine stake pull-out connector (4) includes a movable connecting claw (20) and a fixed connecting claw (21), which are connected by bolts; the movable connecting claw (20) and the fixed connecting claw (21) are symmetrically inserted into the plurality of pine stake grooves (19) arranged side by side.

10. A simplified support method for excavating a water supply pipe trench according to claim 9, characterized in that: The fixed connecting claw (21) is fixed to the outer end of the connecting frame (22). The inner end of the connecting frame (22) is laterally limited and slidably provided with an extension L socket (23). The extension L socket (23) is inserted into the outer frame (12). An extension adjustment bolt (24) is rotatably provided on the extension L socket (23). The extension adjustment bolt (24) is connected to the connecting frame (22) by thread engagement.

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