Method for installing a pressure steel pipe with a slope section

Abstract

The present application relates to pipeline installation construction technical field, specifically to a kind of slope section pressure steel pipe installation method, including S1, traction equipment erection, traction equipment includes the deflection pulley being arranged in slope top and the winch being arranged in slope bottom;S2, pipe trench excavation;S3, track laying;S4, pipe section transport installation;S5, pier construction;S6, earthwork backfilling;S7, detection test.The present application is a kind of slope section pressure steel pipe installation method, by setting winch in slope bottom, deflection pulley is set in slope top, pipe section can be transported from slope bottom to slope top, the problem that the pipe section cannot be transported on the top of slope in prior art can be overcome;By using the butt joint installation of pipe section from top to bottom, cooperate pier to fix pipe section, the installation problem of the pipe section of slope section pressure steel pipe in prior art, which cannot be transported on the top of slope, can be overcome;By pipe trench alignment adjustment, adjust the size of corner at variable slope, so that pipe section can smoothly pass through variable slope position, avoid position interference.

Description

Technical Field

[0001] This invention relates to the field of pipeline installation and construction technology, specifically to a method for installing pressure steel pipes on a slope. Background Technology

[0002] When installing water conveyance pressure steel pipes in a landscape of alternating mountains, plains, and valleys, the entire pressure steel pipe is laid out along the terrain and needs to be installed along slopes with different inclination directions.

[0003] Chinese invention patent CN112721962B discloses a pipe installation device and method for steep slope sections. The device includes a track set along the steep slope, and a pipe installation vehicle is movably mounted on the track via wheels. A winch is installed at an angle above the pipe installation vehicle on the steep slope. The winch controls the pipe installation vehicle to move up and down along the track on the steep slope. By utilizing the self-weight of the pipe and the pipe installation vehicle, as well as the gravitational acceleration on the steep slope, the spigot can be inserted into the socket without external force or with only a small amount of external force, thus realizing the pipe installation.

[0004] However, due to the alternating mountain and valley topography, not all pipelines can be transported smoothly to the top of the slope. This makes it impossible to use the existing method of setting up a winch at the top of the slope and using its own weight and gravity acceleration to complete the installation. At the same time, the pipeline needs to cross the corner between two slopes during transportation and installation. The existing installation device is prone to positional interference with the slope change position of the corner between the two slopes, which prevents the installation vehicle from passing smoothly and affects the construction efficiency and quality. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the inability to transport pipelines to the top of the slope in advance and the ease with which the pipelines can interfere with the slope change location, thus affecting construction efficiency and quality. This invention provides a method for installing pressure steel pipes on slopes.

[0006] This invention provides a method for installing pressure steel pipes on a slope, comprising:

[0007] S1. Erection of traction equipment, which includes a steering pulley set at the top of the slope and a winch set at the bottom of the slope;

[0008] S2. Pipe trench excavation: The pipe trench is excavated in sections and layers from the top of the slope downwards, and a compacted cushion layer is set at the bottom of the pipe trench.

[0009] S3. Track laying: Lay tracks in the pipe trench and set up transport trolleys on the tracks.

[0010] S4, pipe section transportation installation, the traction device pulls the transportation mechanism loaded with the pipe section along the track to the top of the slope through the steel wire rope, and then the pipe sections are connected and installed from top to bottom;

[0011] S5, pier construction, the reinforced concrete cast-in-place member for covering and fixing the pipe section is cast in place in the pipe trench;

[0012] S6, earth backfilling;

[0013] S7, detection test.

[0014] The slope section pressure steel pipe installation method of the present application can realize the transportation of the pipe section from the slope bottom to the slope top by setting the winch at the slope bottom and the diverting pulley at the slope top, and can overcome the transportation and installation difficulties of the slope section pressure steel pipe pipe section by adopting the connection and installation of the pipe section from top to bottom, cooperating with the pier to fix the pipe section, and setting the track in the pipe trench, which can adjust the corner size at the slope change through the pipe trench line shape, so that the pipe section can smoothly pass through the slope change position and avoid position interference.

[0015] Preferably, in step S2, when the pipe trench is excavated to a distance of not less than 300mm from the bottom design line, manual trench cleaning is adopted, a curve transition section is arranged at the slope change point in the pipe trench, the radius of curvature of the curve transition section is not less than 20m, the side slopes of the pipe trench are protected and treated by using mortar masonry, anchor spraying or anchor rod frame beams, and the soft foundation treatment is carried out in the pipe trench by using replacement or riprap squeezing.

[0016] Preferably, two track foundations are arranged along the compacted cushion line at the bottom of the pipe trench, and the two track foundations are relatively distributed on both sides of the pipe section central axis, the track foundation is a reinforced concrete cast-in-place strip member, and a pre-embedded part for connecting the track is arranged on the track foundation.

[0017] Preferably, a rope supporting wheel is arranged to contact the steel wire rope at the slope change point and the pier.

[0018] Preferably, in step S4, the transportation mechanism includes a cross beam and a transportation trolley, the two ends of the cross beam are respectively provided with a rope passing hole for passing the steel wire rope, the transportation trolley includes a double-door type trolley frame, the trolley frame bottom plate is provided with a walking wheel matched with the track, the trolley frame is provided with a traction point axially opposite to the rope passing hole, and at least four lifting points are further arranged on the trolley frame, each lifting point is provided with a hand-operated hoist, the bottom end of the hand-operated hoist is connected with a lifting hoop mechanism for clamping the pipe section, and the winch is connected with the transportation trolley through the steel wire rope passing through the rope passing hole.

[0019] Preferably, after the pipe section is transported to the position, the position and angle are adjusted by the hand chain block on the transportation mechanism, the transportation trolley is locked, the pipe section is fixed by segment seam welding or plate welding, the transportation trolley is removed, and the pipe section girth weld is welded by symmetrical welding of even number of welders layer by layer.

[0020] Preferably, the pipe section girth weld includes outer ring seam welding and inner ring seam welding, the outer ring seam welding is performed on the outer construction platform arranged outside the pipe section, and the inner ring seam welding is performed by the limiting mechanism and the cable arranged on the slope top to limit the inner construction platform.

[0021] Preferably, in step S5, the pier is excavated before the pipe section is positioned, and the formwork is arranged, the pier is formed by twice pouring, the first pouring is performed to the bottom surface of the pipe section, the reinforcing steel bars are reserved with a lap length, and the remaining reinforcing steel bars and concrete are constructed after the pipe section is installed.

[0022] Preferably, in step S6, the earthwork backfilling includes layered and segmented backfilling, the compaction degree of each layer is not less than 90%, the single backfilling thickness is not more than 20 cm, and the backfilling material includes medium-coarse sand, undisturbed soil, gravel chips and sand gravel.

[0023] Preferably, in step S7, the detection test includes cross measurement and line laying, elevation measurement, rechecking of the pipe plane direction and the vertical direction of the pipe section, and water pressure test of the pipe formed by the pipe sections.

[0024] Compared with the prior art, the method has the following beneficial effects:

[0025] 1. The method can realize the transportation of the pipe section from the slope bottom to the slope top by arranging the winch at the slope bottom and arranging the diverting pulley at the slope top, and can overcome the problem that the pipe section cannot be transported on the slope top in the prior art.

[0026] 2. The method can overcome the problem that the pipe section cannot be transported on the slope top in the prior art by adopting the downward butt joint installation of the pipe section and cooperating with the pier to fix the pipe section.

[0027] 3. The method can adjust the pipe groove line shape and adjust the corner size at the slope change, so that the pipe section can smoothly pass through the slope change position and avoid position interference. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a flowchart of the method for installing the slope section pressure steel pipe of Example 1.

[0029] Figure 2A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1.

[0030] Figure 3 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1. Figure 2 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1.

[0031] Figure 4 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1.

[0032] Figure 5 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1.

[0033] Figure 6 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1.

[0034] Figure 7 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1.

[0035] Figure 8 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1. Figure 1 .

[0036] Figure 9 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1. Figure 2 .

[0037] Figure 10 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1.

[0038] Figure 11 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1.

[0039] Figure 12 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1. Figure 1 .

[0040] Figure 13 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1. Figure 2 .

[0041] Figure 14 A schematic view of the installation of the pressure steel pipe in the steep slope section for the construction project in Example 1. Figure 3 .

[0042] Markings in the figure:

[0043] 1 - hoist, 11 - wire rope, 2 - diverting pulley, 3 - pipe slot, 31 - ramming pad, 4 - track, 41 - track foundation, 5 - transport trolley, 51 - trolley frame, 52 - walking wheel, 53 - traction point, 54 - hand chain block, 55 - hanger mechanism, 551 - upper hanger, 552 - lower hanger, 6 - pipe section, 7 - abutment, 8 - rope support pulley, 9 - cross beam, 91 - rope passing hole, 10 - outside pipe construction platform, 20 - inside pipe construction platform, 201 - limiting mechanism, 202 - inhaul cable. DETAILED DESCRIPTION

[0044] The application will be further described below in connection with specific embodiments. However, it should be understood that the above-mentioned subject matter of the application is not limited to the following embodiments, and any technology realized based on the content of the application falls within the scope of the application.

[0045] In the description of the embodiments of the application, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inner", "outer" and the like are expressed based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / device / apparatus of the application is normally used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the application or simplifying the description in the embodiments, and for the convenience of the skilled person to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the application.

[0046] In addition, if the terms "horizontal", "vertical", "suspended", "parallel", "coaxial" and the like appear, it does not mean that the corresponding device / component / element must be absolutely horizontal or vertical or suspended or parallel or coaxial, but can be slightly inclined or deviated, as long as it does not affect the normal function of the related component. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined; "coaxial" means that two components are arranged as coaxial as possible, and move in the same or approximately coaxial manner when the relative position changes. Alternatively, it can be simplified to understand that the corresponding device / component / element is arranged in the "horizontal", "vertical", "suspended", "parallel", "coaxial" direction, and can have an error / deviation of ±10% relative to the corresponding direction, more preferably an error / deviation of ±8% or less, more preferably an error / deviation of ±6% or less, more preferably an error / deviation of ±5% or less, more preferably an error / deviation of ±4% or less. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the application.

[0047] In addition, the terms appearing in the description of the embodiments of the present application, such as "first", "second", "third", etc., are only used to distinguish the same or similar components for description, and should not be understood as emphasizing or implying the relative importance of the specific components.

[0048] In addition, in the description of the embodiments of the present application, "several", "a plurality of", "several" represent at least 2. It can be 2, 3, 4, 5, 6, 7, 8, 9, etc. Any case, it can even be more than 9 cases.

[0049] In addition, in the description of the technical solutions of the present application, unless otherwise specified / limited / limited, the terms "set", "install", "connect", "connect", "set", "lay", "arrange" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, which can be welding, riveting, bolting, screwing, etc. The connection means commonly used in the art. Such connection can be mechanical connection, or electrical connection or communication connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements.

[0050] Embodiment 1

[0051] A construction project is taken as an example to illustrate the installation of a pressure steel pipe on a steep slope section. The pressure pipe involved in the construction project is a DN2600*22mm pressure steel pipe with an inner diameter of 2.6m and a DN2600*20mm pressure steel pipe, which needs to be laid along a steep slope section with a slope greater than 15° and a maximum slope of 32.13°. There are multiple slope change positions on the slope surface, and the on-site crane and ordinary pipe transport vehicle cannot reach the top of the slope. The pipe joint 6 can only be transported to the bottom of the slope through the rural road.

[0052] As shown in Figure 1 The embodiment provides a pressure steel pipe installation method for a slope section, which comprises the following steps:

[0053] S1, erecting a traction device, the traction device comprising a diverting pulley 2 arranged at the top of the slope and a winch 1 arranged at the bottom of the slope;

[0054] S2, excavating a pipe trench 3, the pipe trench 3 being excavated in sections and layers from the top of the slope downward, and a rammed cushion layer 31 being arranged at the bottom of the pipe trench 3;

[0055] S3, laying a track 4, the track 4 being laid in the pipe trench 3, and a transport trolley 5 being arranged on the track 4;

[0056] S4, transporting and installing a pipe joint 6, the traction device pulling the transport mechanism carrying the pipe joint 6 along the track 4 to the top of the slope through a steel wire rope 11, and then sequentially connecting and installing the pipe joints 6 from top to bottom;

[0057] S5, construction of the pier 7, cast-in-place construction of the reinforced concrete cast-in-place member for covering and fixing the pipe section 6 in the pipe trench 3;

[0058] S6, earthwork backfilling;

[0059] S7, detection test.

[0060] Step S1 is performed after conventional construction preparation and measurement and setting out, the construction preparation mainly includes clearing the site in the construction strip by using a loader or an excavator, after the clearing, rolling the construction strip on one side to be used, using as a temporary stacking site for the in-site road and pipe material, providing construction electricity and water planning, the measurement and setting out mainly includes measuring the original terrain longitudinal and transverse sections according to the design drawings, calculating the excavation boundary line according to the verified pipe center line coordinates, and setting out the excavation boundary line and scattering the gray line by using a total station.

[0061] As shown in Figures 12-14 , step S2 is used for excavating the earthwork to form the pipe trench 3 for pipe laying according to the side-set excavation boundary line, and performing cushion construction in the pipe trench 3.

[0062] In an optional embodiment, the pipe trench 3 excavation can be performed by using an excavator to transport and excavate in sections and layers, each 5 meters from the top of the slope, when encountering boulders and soft rocks, the excavator can be used in cooperation with a hydraulic breaking hammer for excavation, and a self-unloading vehicle is used for loading and transferring at the bottom of the slope, and the loading is performed to the designated soil dumping site or temporary stacking site, and the temporary stacking site is arranged in the construction strip which has been backfilled or the non-excavation construction strip which does not affect the excavation construction.

[0063] In an optional embodiment, the section length of the pipe trench 3 excavation can be 50-100 meters as one construction unit according to the stability of the soil layer, after the excavation is completed, the trench is checked and the pipe construction is organized in time to avoid collapse due to long exposure.

[0064] In an optional embodiment, in step S2, when the pipe trench 3 is excavated to a distance of not less than 300 mm from the design line of the trench bottom by using a machine, manual trench cleaning is performed to prevent overexcavation, and the drainage ditch and the water collecting pit on both sides of the pipe trench 3 are excavated in time during the pipe trench 3 cleaning process.

[0065] In an optional embodiment, as shown in Figures 8-9 , the curve transition section can be excavated and arranged at the inflection point of the slope change in the pipe trench 3, and the arc radius of the curve transition section is not less than 20 m.

[0066] In an optional embodiment, the slope trimming work is performed while the pipe trench 3 is excavated, after each layer is excavated, the slope is trimmed by using an excavator and manual cooperation, and the trench bottom width, trench depth, layered excavation height, slope of each layer and interlayer table width and the like of the construction excavation section are checked in time to avoid serious overexcavation and underexcavation, and to ensure the construction quality and safety.

[0067] In one or more embodiments, for the case that the side slope of the pipe trench 3 needs to be protected, measures such as mortar masonry, anchor spray or anchor rod frame beam can be used for protection.

[0068] In one or more embodiments, for the case that the pipe trench 3 does not meet the requirements of the foundation bearing capacity, the pipe trench 3 can be treated by replacement or riprap squeezing in the pipe trench 3. If the construction process encounters soft foundation and other adverse geological conditions, foundation replacement or steel sheet pile support treatment can be reasonably used.

[0069] In an optional embodiment, the soft foundation treatment can use block stone, stone and other replacement materials. The compressive strength of the replacement material needs to meet the design and specification requirements, and the stone quality needs to be uniform, not easy to weather, and no cracks. The particle size of the stone is preferably greater than 30 cm. The size of the stone is matched during replacement, and the maximum particle size of the stone should not be greater than 2 / 3 of the thickness of the cushion.

[0070] In an optional embodiment, the replacement construction mainly includes: (1) determining the soft foundation depth according to the touch and design requirements, and excavating the soft foundation. A soil layer of about 200 mm thick is reserved and not excavated, and is excavated to the replacement elevation before paving; (2) uniformly paving the stone, and filling the gap on the surface with fine gravel with a diameter of 5-25 mm. The surface of the gravel is kept wet by sprinkling water before compaction, and the upper layer construction can be carried out after the compaction is detected to be qualified.

[0071] In an optional embodiment, the riprap squeezing construction mainly includes: using an excavator to cooperate with manual layering and throwing filling. The thickness of the first layer of throwing filling is suitable for the construction machinery, and the throwing filling construction is carried out by using the weight of the rough stone for preliminary squeezing, then leveling the top surface of the rough stone, and using the excavator with large weight for rolling and tamping. After the riprap filling and squeezing are completed, the top surface of the riprap is paved with relatively small gravel, and is leveled. The gap is filled with small stones or stone chips after the rolling is carried out by mechanical equipment until the settlement deformation is stable.

[0072] In one or more embodiments, the tamping cushion 31 can use backfill sand and stone materials, C25 concrete and other materials. The cushion construction can be carried out in the test section construction in advance. The loose thickness, compaction thickness, rolling process, compaction machinery, vibration parameters and the like are determined through the test section construction and detection, and are used to guide the subsequent construction.

[0073] In an optional embodiment, the construction of the tamping cushion 31 mainly includes: laying out the cushion edge line according to a point position every 10 m, marking the point position with a short steel bar, and using the reserved length to control the thickness of the cushion. For the cushion construction using medium-coarse sand, a large excavator is used to shovel the medium-coarse sand into the pipe trench 3, manual work is combined with a small excavator to perform initial leveling and initial rolling, and after the initial leveling is completed, a vertical tamper is used in combination with a flat tamper to tamp; for the cushion construction using C25 concrete, a concrete pump is used to pump concrete into the pipe trench 3, manual work is combined with a small excavator to perform initial leveling, and after the initial leveling is completed, a vibrating rod is used to compact and densify, and a step baffle is arranged every 10 m to prevent concrete from sliding.

[0074] Step S3 is used to set the track foundation 41 in the pipe trench 3 to provide support for the transportation of the pipe section 6.

[0075] In an optional embodiment, two track foundations 41 are arranged along the tamping cushion 31 line at the bottom of the pipe trench 3, and the two track foundations 41 are distributed on both sides of the central axis of the pipe section 6. The track foundation 41 is a reinforced concrete cast-in-place strip member, and a pre-embedded part for connecting the track 4 is arranged on the track foundation 41.

[0076] In an optional embodiment, as shown in Figure 4 The track foundation 41 can be a reinforced concrete structure formed by using HRBφ16 longitudinal reinforcement and HRBφ12 stirrups every 20 cm to cast C25 concrete. The track foundation 41 is a strip foundation with a cross-sectional width of 50 cm and a height of 40 cm. An I-beam is selected as the track 4. A steel plate pre-embedded part for connecting the track 4 is installed during the construction of the cushion. The pre-embedded part is welded with the reinforcement cage of the track foundation 41. In the later period, the track 4 is directly welded with the pre-embedded part by using fillet welding.

[0077] Step S4 is used to transport the pipe section 6 from the slope bottom to the slope top by a transportation mechanism.

[0078] In an optional embodiment, as shown in Figures 4-7As shown, the transport mechanism includes a crossbeam 9 and a transport trolley 5, the crossbeam 9 is provided with a rope passing hole 91 at each end for passing the steel wire rope 11, the transport trolley 5 includes a double-door type vehicle frame 51, the bottom plate of the vehicle frame 51 is provided with a walking wheel 52 adapted to the track 4, the vehicle frame 51 is provided with a traction point 53 axially opposite to the rope passing hole 91, and the vehicle frame 51 is further provided with at least four lifting points, each lifting point is provided with a hand-operated hoist 54, the bottom end of the hand-operated hoist 54 is connected to a lifting hoop mechanism 55 for clamping the pipe section 6, and the hoist 1 is connected to the transport trolley 5 through the steel wire rope 11 passing through the rope passing hole 91. The crossbeam 9 is used to be arranged in front of the transport trolley 5, and is connected to the transport trolley 5 through the short steel wire rope 11, which plays a guiding role on the traction steel wire rope 11, so as to avoid the damage of the steel wire rope 11 or the pipe section 6 caused by the positional interference between the steel wire rope 11 and the pipe section 6; the transport trolley 5 of the double-door type vehicle frame 51 adjusts the relative position of the upper hoop 551 and the lower hoop 552 of the lifting hoop mechanism 55 through the hand-operated hoist 54, the upper hoop 551 is fixed on the vehicle frame 51, and the lower hoop 552 is oppositely arranged with the upper hoop 551 and is respectively provided with an arc clamping surface, which can adjust the clamping range of the lifting hoop mechanism 55 according to the outer diameter of the pipe section 6.

[0079] In an optional embodiment, the double-door type vehicle frame 51 can form an avoiding space between the supporting legs of the transport trolley 5 by lengthening the supporting legs or raising the height of the connecting rod between the two door type vehicle frames 51, so that when the transport trolley 5 passes through the variable slope turning point position, the pipe section 6 will not interfere with the variable slope turning point, ensuring the smooth transportation of the pipe section 6.

[0080] In an optional embodiment, the transport trolley 5 can be pulled to the vicinity of the hoist 1, the automobile crane (or caterpillar crane) is used to lower the pipe section 6 to the trench ground and ensure that it is on the center line of the two tracks 4, then the steel wire rope 11 of the hoist 1 is loosened, the transport trolley is pushed and pulled to the upper side of the pipe section 6 in a manual manner, then the automobile crane (or caterpillar crane) is used to lift the steel pipe until the top of the pipe contacts with the upper hoop 551 of the transport trolley 5, finally the lower hoop 552 of the transport trolley 5 is installed and the chain hoist is locked, and the automobile crane is removed, thereby completing the loading of the pipe section 6.

[0081] In an optional embodiment, after the pipe section 6 is transported to the position, the pipe section 6 is hoisted, the four hand-operated hoists 54 of the transport trolley 5 are adjusted to adjust the position and angle of the pipe opening, the pipe opening is centered, the 16# I-beams are used to support the left and right sides of the steel pipe, after the support welding is completed, the girth assembly and welding are performed, the pipe openings of the front and rear pipe sections 6 are fixed by segment seam welding around the pipe openings, and the transport trolley 5 is removed, and the segment seam welding can be welding which vertically crosses the to-be-welded weld or is distributed along the to-be-welded weld segment.

[0082] In an optional embodiment, the pipe joint 6 is welded by gas shielded welding, and an even number of welders are symmetrically welded. After the inner side is welded, the outer side is cleaned by carbon arc air gouging until the deposited metal leaks out. After polishing the leaked metal to a gloss, the outer seam welding is performed.

[0083] In an optional embodiment, a rope wheel 8 can also be arranged at the variable slope inflection point and the pier 7 respectively, which is used to contact with the traction steel wire rope 11 to ensure the smooth traction transportation of the pipe joint 6.

[0084] In an optional embodiment, the girth welding of the pipe joint 6 includes outer girth welding and inner girth welding, as shown in Figure 10 When the outer girth welding is performed, an outer pipe construction platform 10 can be erected outside the pipe joint 6, as shown in Figure 11 When the inner girth welding is performed, the inner construction platform 20 is limited by the limiting mechanism 201 and the cable 202 arranged on the slope top. The limiting mechanism 201 can be a hook welded on the inner wall of the pipeline, or a column or anchor bolt anchored on the slope top in advance.

[0085] Step S5 is used to arrange the pier 7 of the reinforced concrete structure at the corresponding position of the pipe trench 3, which plays a role in stabilizing the pipeline and limiting the displacement of the pipeline.

[0086] In an optional embodiment, the pier 7 can be excavated before the pipe joint 6 is in place, and the formwork is erected. The pier 7 is formed by pouring twice. The first pouring is to the bottom surface of the pipe joint 6, and the reinforcement is reserved with a lap length. After the pipe joint 6 is installed, the remaining reinforcement and concrete construction are performed.

[0087] In an optional embodiment, as shown in Figures 2-3 The pier 7 can be arranged at a position with a variable slope inflection point.

[0088] In an optional embodiment, after the pipe joint 6 at the position of the pier 7 is installed, the weld joint is detected, and the pipeline internal and external anticorrosive coating is made after the detection is qualified. After the anticorrosive construction is completed, the first layer of reinforced concrete of the pier 7 is constructed. The concrete pouring uses an excavator or a chute to enter the mold, and a plug-in vibrator is vibrated. The concrete poured the second time is treated according to the construction joint with the concrete poured the first time.

[0089] Step S6 is used to backfill the earthwork of the pipe trench 3, so that the pipeline is stably buried in the soil.

[0090] In an optional embodiment, the earthwork backfill is carried out in layers and sections, each layer having a compaction degree of not less than 90%, and each backfill having a thickness of not more than 20 cm. The backfill material includes medium-coarse sand, undisturbed soil, gravel chips and sand gravel. Taking the earthwork backfill of a pipe trench 3 having four sections with different slopes as an example, the first section can be paved with medium-coarse sand to a thickness of 30 cm, and the compaction degree is 90%; the second section can be backfilled with medium-coarse sand to a thickness of 65 cm, and the compaction degree is 92%; the third section can be backfilled with undisturbed soil or medium-coarse sand, gravel chips and sand gravel with a maximum particle size of less than 40 mm to the top of the pipe, and the compaction degree is 92%; and the fourth section can be backfilled with undisturbed soil or medium-coarse sand, gravel chips and sand gravel with a maximum particle size of less than 40 mm to a height of about 2.6 m above the top of the pipe, and the compaction degree of the side of the pipe is 90% and the compaction degree of the top of the pipe is 85±2%.

[0091] In an optional embodiment, the earthwork backfill is carried out in layers and sections, each layer having a compaction degree of not less than 90%, and each backfill having a thickness of not more than 20 cm. The backfill material includes medium-coarse sand, undisturbed soil, gravel chips and sand gravel. Taking the earthwork backfill of a pipe trench 3 having four sections with different slopes as an example, the first section can be paved with medium-coarse sand to a thickness of 30 cm, and the compaction degree is 90%; the second section can be backfilled with medium-coarse sand to a thickness of 65 cm, and the compaction degree is 92%; the third section can be backfilled with undisturbed soil or medium-coarse sand, gravel chips and sand gravel with a maximum particle size of less than 40 mm to the top of the pipe, and the compaction degree is 92%; and the fourth section can be backfilled with undisturbed soil or medium-coarse sand, gravel chips and sand gravel with a maximum particle size of less than 40 mm to a height of about 2.6 m above the top of the pipe, and the compaction degree of the side of the pipe is 90% and the compaction degree of the top of the pipe is 85±2%.

[0092] Step S7 is a detection test after each pipe section 6 is installed and a certain mileage range of the pipeline is installed to ensure the quality of pipeline installation.

[0093] In an optional embodiment, the detection test includes cross measurement and line laying, elevation measurement, checking the horizontal and vertical directions of the pipeline, and hydraulic testing of the pipeline formed by the pipe sections 6 after each pipe section 6 is installed to ensure the quality of pipe section 6 installation and the quality of the pipeline formed.

[0094] The slope section pressure steel pipe installation method of the embodiment can realize the transportation of the pipe sections 6 from the slope bottom to the slope top by setting the winch 1 at the slope bottom and the diverting pulley 2 at the slope top, and can overcome the transportation and installation difficulties of the pipe sections 6 of the slope section pressure steel pipe by carrying out the butt joint installation of the pipe sections 6 from top to bottom and fixing the pipe sections 6 by cooperating with the abutment 7. Meanwhile, the track 4 is arranged in the pipe trench 3, the size of the corner at the slope change can be adjusted by the linear adjustment of the pipe trench 3, the pipe sections 6 can smoothly pass through the slope change position, and position interference can be avoided.

[0095] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method of installing a sloping section penstock, characterized by, Comprise: S1, traction equipment erection, traction equipment includes setting in the slope top deflection pulley (2) and setting in the slope bottom winch (1); S2, pipe trench (3) excavation, pipe trench (3) is segmented and layered from the slope top downward excavation, the inflection point in pipe trench (3) is provided with curve transition section, the radius of curvature of curve transition section is not less than 20m;Pipe trench (3) both sides slope uses mortar masonry, anchor spray or anchor rod frame beam to carry out protection treatment;Pipe trench (3) is in the way of replacement or riprap extrusion silt and is treated in soft foundation, pipe trench (3) bottom is provided with ramming cushion (31); S3, track (4) laying, pipe trench (3) bottom is provided with two track foundations (41) along the line shape of ramming cushion (31), two track foundations (41) are relatively distributed in the central axis of pipe joint (6) two sides, track foundation (41) is reinforced concrete cast-in-place strip member, track foundation (41) is provided with embedded part for connecting track (4), uses I-shaped steel as track, lays track (4) in pipe trench (3), sets up transport trolley (5) on track (4); S4, pipe joint (6) transport installation, traction equipment moves to the slope top along track (4) through steel wire rope (11) traction carrying pipe joint (6) transport mechanism, in turn from top to bottom for pipe joint (6) butt joint installation, transport mechanism includes crossbeam (9) and transport trolley (5), the both ends of crossbeam (9) are respectively provided with rope hole (91) for setting steel wire rope (11), crossbeam (9) is used for setting in the front of transport trolley (5), is connected with transport trolley (5) through short steel wire rope (11), transport trolley (5) includes double door type vehicle frame (51), the bottom plate of vehicle frame (51) is provided with walking wheel (52) with track (4) adaptation, vehicle frame (51) is provided with traction point (53) with the axial opposite of rope hole (91), vehicle frame (51) is also provided with at least four lifting points, each lifting point is provided with hand-operated hoist (54), the bottom end of hand-operated hoist (54) is connected with the lifting clamp mechanism (55) for holding pipe joint (6), the relative position of upper clamp (551) and lower clamp (552) of lifting clamp mechanism (55) is adjusted by hand-operated hoist (54), upper clamp (551) is fixed on vehicle frame (51), lower clamp (552) is opposite to upper clamp (551) and is respectively provided with arc clamping surface, winch (1) is connected with transport trolley (5) through steel wire rope (11) passing through rope hole (91), after pipe joint (6) is transported in place, the position and angle are adjusted through hand-operated hoist (54) on transport mechanism, lock transport trolley (5), use section steel support in the bottom of pipe joint (6), fix adjacent pipe joint (6) with segmental seam welding or code plate welding, remove transport trolley (5), and symmetrically weld through even number of welders, complete pipe joint (6) ring weld joint welding layer by layer, pipe joint (6) ring weld joint welding includes outer ring seam welding and inner ring seam welding, when outer ring seam welding, pipe outside construction platform (10) is set up on pipe joint (6) outside, when inner ring seam welding, realize pipe inside construction platform (20) limiting through the limiting mechanism (201) and cable (202) setting in the slope top; S5, the construction of the pier (7), the cast-in-place construction of the reinforced concrete cast-in-place member for covering and fixing the pipe section (6) in the pipe trench (3), the pier is arranged at a position with a variable slope inflection point, the pier (7) is excavated before the pipe section (6) is in place, and a formwork is erected, the pier (7) is formed by pouring twice, the first pouring is to the bottom surface of the pipe section (6), the steel bars are reserved with a lap length, after the pipe section (6) is installed, the remaining steel bars and the concrete are constructed, the rope wheel (8) is arranged at the variable slope inflection point and the pier (7) respectively and is in contact with the steel wire rope (11); S6, earthwork backfilling; S7, detection test.

2. A method of installing a slope section penstock according to claim 1, wherein In step S2, when the pipe trench (3) is excavated by a machine to a distance of not less than 300mm from the design line of the trench bottom, manual trench cleaning is adopted.

3. A method of installing a slope section penstock according to claim 1, wherein In step S6, the earthwork backfilling includes layered and segmented backfilling, the compaction degree of each layer is not less than 90%, the single backfilling thickness is not more than 20cm, and the backfilling material includes medium-coarse sand, undisturbed soil, stone chips and gravel.

4. A method of installing a slope section penstock according to claim 1, wherein In step S7, the detection test includes cross measurement and line laying, elevation measurement, rechecking of the horizontal and vertical directions of the pipeline for the installed pipeline after each pipe section (6) is assembled, and hydraulic testing of the pipeline composed of the pipe sections (6).

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