A full assembly type concrete drainage pipeline rapid construction equipment and construction method

Abstract

The application discloses a kind of full assembly type concrete drainage pipeline rapid construction equipment and construction method, it is related to concrete drainage pipeline construction technical field;The construction equipment mainly includes pipeline lifting appliance and pipeline tight machine, when drainage pipeline is hoisted in place by pipeline lifting appliance, the slow tightening of wire rope of pulling device on pipeline tight machine drives crossbeam blocking frame to slowly pull drainage pipeline to move back, and slowly butt joint with the drainage pipeline that has been installed is tight;Construction method mainly includes construction preparation, surveying and setting out, excavating trench, pipe base treatment, sand cushion leveling, integrated pipe pillow construction, concrete drainage pipeline installation and seven steps of flow state solidified soil backfilling.The application can significantly shorten construction time, reduce labor cost, and also can guarantee the quality and stability of drainage pipeline.

Description

Technical Field

[0001] This invention relates to the field of concrete drainage pipe construction technology, and in particular to a rapid construction equipment and construction method for fully prefabricated concrete drainage pipes. Background Technology

[0002] With the acceleration of urbanization and the continuous development of construction projects, drainage engineering has become increasingly important. Traditional drainage pipeline construction techniques often suffer from high difficulty and long construction periods, impacting project progress and quality. Therefore, improving drainage pipeline construction techniques to complete projects quickly and efficiently has become a crucial issue facing current drainage engineering construction. Summary of the Invention

[0003] Based on the above problems, the purpose of this invention is to provide a rapid construction equipment and method for fully prefabricated concrete drainage pipes. The technical solution adopted by this invention is as follows:

[0004] This invention provides a rapid construction device for fully prefabricated concrete drainage pipes, comprising:

[0005] A pipe lifting device, comprising an upper boom and a lower boom, the upper boom and the lower boom being arranged in parallel, and one end of the upper boom and the lower boom being connected by a connecting arm, and a crossbeam support being provided below the lower boom;

[0006] A pipe tightening machine includes a gantry frame, a pipe clamping mechanism in the gantry frame, a self-moving mechanism at the bottom of the gantry frame, and a pulling device on the gantry frame. The movable end of the pulling device is connected to the end of the crossbeam stop via a steel wire rope.

[0007] Preferably, the upper boom is provided with multiple lifting holes, and the lower boom is provided with an arc-shaped support plate that fits against the inner wall of the pipe.

[0008] Preferably, the crossbeam support includes a crossbeam, both ends of which are provided with hanging points, and a transition arm is provided at the top of the crossbeam, the transition arm being connected to the lower boom.

[0009] Preferably, a rubber pad is provided on the contact and pressure surface between the crossbeam and the pipe.

[0010] Preferably, the pipe clamping mechanism includes two symmetrically arranged arc-shaped clamping plates, with clamping arms provided along the upper edge of the arc-shaped clamping plates. The clamping arms are hinged to the top of the portal frame, and a clamping cylinder is provided on the outer side of the arc-shaped clamping plates. One end of the clamping cylinder is hinged to the arc-shaped clamping plates, and the other end is hinged to the side of the portal frame.

[0011] Preferably, a rubber pad is provided on the contact and pressing surface of the arc-shaped clamp.

[0012] Preferably, the self-moving mechanism includes two connecting seats, which are fixedly connected to the side of the portal frame at intervals. Each connecting seat is provided with a vertically arranged height adjustment cylinder, and each height adjustment cylinder is provided with a roller frame at its lower end. The two roller frames cooperate with the same I-shaped guide rail below. Rollers are rolled in the slots on both sides of the I-shaped guide rail, and the rollers are rotatably connected to the corresponding roller frames.

[0013] A pushing cylinder is provided on the outer side of the roller frame located at the rear. One end of the pushing cylinder is hinged to the roller frame, and the other end is hinged to the I-shaped guide rail.

[0014] Preferably, a baffle is provided at the rear end of the I-shaped guide rail, the baffle is arranged perpendicularly to the I-shaped guide rail, and the baffle is hinged to the I-shaped guide rail.

[0015] Preferably, the pulling device includes two drag cylinders, which are respectively arranged on both sides of the gantry frame.

[0016] This invention also provides a rapid construction method for fully prefabricated concrete drainage pipes, including the rapid construction equipment for fully prefabricated concrete drainage pipes as described in any one of the claims, characterized in that: the construction method includes the following steps:

[0017] Step 1: Construction preparation. Before construction, review the construction drawings, prepare the construction organization design and conduct handover work; inspect and accept raw materials and semi-finished products, and promptly remove unqualified materials and semi-finished products from the site for replacement; inspect the mechanical equipment used on site to ensure that it is operating without problems.

[0018] Step two: Surveying and setting out the trench. Based on the construction design drawings, on-site geological conditions and site conditions, the surveyors set out the excavation boundary line before excavation, sprinkle lime lines, drive wooden stakes at the four corners of the top opening, and mark the excavation depth. The excavation of the well chamber and the trench are carried out simultaneously. The center position of the well chamber structure is measured and set out using the polar coordinate method according to the coordinates of the well chamber station number. The top line of the structure excavation and the excavation elevation control stakes are measured and set out according to the well chamber size. At the same time, the stakes are driven.

[0019] Step 3: Pipe foundation treatment. After the trench excavation and manual leveling are completed, a foundation bearing capacity test must be conducted. The characteristic value of the pipeline foundation bearing capacity should not be less than the requirements of the design drawings. Once the foundation bearing capacity meets the requirements, the next construction procedure can proceed. If the bearing capacity requirement does not meet the standard, the foundation needs to be treated. When the pipeline is located below the groundwater level, a rubble cushion layer can be used. The rubble is laid in layers and compacted. The thickness of the foundation treatment is cm, the same width as the foundation. After the foundation treatment, the bearing capacity should meet the foundation bearing capacity requirements. When the pipeline is located in a layer of miscellaneous fill, all the miscellaneous fill must be excavated and replaced with plain soil. Frozen soil and topsoil must not be used for replacement. After replacement, the compaction degree should not be less than %. The characteristic value of the foundation bearing capacity after treatment should meet the foundation bearing capacity requirements.

[0020] Step 4: Leveling the sand cushion layer. The sand used for the sand cushion layer should meet the design requirements. Use qualified river sand. Determine the width of the sand cushion layer according to the width of the integrated drainage pipe sleeper. The surveyor sets up control stakes and hangs lines according to the center stake position. Spread sand evenly inside the formwork and then level it manually with a spirit level.

[0021] Step 5: Construction of integrated pipe sleeper. Use the reserved hoisting port on the integrated pipe sleeper to hoist the pipe sleeper. After the pipe sleeper is in place, check the elevation of the top surface of the pipe sleeper. For the high parts, use a small plate tamping machine to ensure the accuracy of the drainage pipe elevation and close contact with the sand cushion layer.

[0022] Step Six: Concrete drainage pipe installation. The drainage pipe is hoisted using the aforementioned pipe hoisting tool. When the pipe is lowered to about cm above the pipe support, the construction personnel assist in temporarily centering and positioning it. The drainage pipe is connected using the aforementioned pipe tightening machine. The pulling device slowly tightens the steel wire rope, which drives the crossbeam support to slowly pull the pipe backward, slowly and tightly connecting it with the already installed pipe.

[0023] Step 7: Backfilling with fluidized solidified soil. The fluidized solidified soil is poured evenly into the erected formwork in layers and sections using a chute. The surface is then leveled. After the bottom layer is completed and the solidified soil has reached a strength suitable for walking, the next layer can be applied. After the surface layer is completed, it is leveled with a special tool.

[0024] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0025] This invention discloses a fully prefabricated concrete drainage pipe rapid construction equipment. The drainage pipe is hoisted using a pipe lifting tool, and the drainage pipe is connected using a pipe tightening machine. A pulling device slowly tightens the steel wire rope, which drives the crossbeam frame to slowly pull the pipe backward, and slowly connects it tightly with the installed pipe. This can effectively improve the assembly efficiency of drainage pipes.

[0026] This invention discloses a rapid construction method for fully prefabricated concrete drainage pipes. While ensuring construction quality, it employs a rapid construction method for fully prefabricated concrete drainage pipes. Inspection wells are prefabricated using adjustable standard molds, dividing the well into upper and lower chambers, which are prefabricated separately, avoiding the difficulties of transportation, storage, and on-site hoisting associated with monolithic prefabrication. Integrated pipe supports are used, eliminating the need for on-site concrete pouring. This new process removes the steps of casting pipe supports and concrete curing, significantly shortening the construction period. Backfill uses fluidized solidified soil; after the solidified slurry mixture is poured, no large machinery is required for compaction, saving construction costs. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the fully prefabricated concrete drainage pipe in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the fully prefabricated concrete drainage pipe rapid construction equipment in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the pipe lifting device in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the pipe tightening machine in an embodiment of the present invention;

[0032] Figure 5 This is a side view of the pipe tightening machine in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the modular well chamber in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached drawings: 1. Pipe lifting tool; 101. Upper boom; 101-1. Lifting hole; 102. Lower boom; 102-1. Arc-shaped support plate; 103. Connecting arm; 104. Crossbeam support frame; 104-1. Cross beam; 104-2. Hanging point; 104-3. Adapter arm; 2. Pipe tightening machine; 201. Gantry frame; 202. Pipe clamping mechanism; 202-1. Arc-shaped clamp; 202-2. Clamping arm; 202-3. Clamping clamp. 203. Tightening cylinder; 203. Self-moving mechanism; 203-1. Connecting seat; 203-2. Height adjustment cylinder; 203-4. I-beam guide rail; 203-5. Roller; 203-6. Pushing cylinder; 204. Pulling device; 204-1. Dragging cylinder; 205. Baffle; 3. Integrated pipe sleeper; 301. Base plate; 302. Protrusion; 303. Groove; 304. Base plate; 305. Arc-shaped sleeper groove; 4. Drainage pipe; 5. Steel wire rope. Detailed Implementation

[0035] To make the technical problems, technical solutions, and beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] like Figure 1 As shown, this is a fully prefabricated concrete drainage pipe, whose structure mainly includes a drainage pipe 4 and an integrated pipe rest 3. The integrated pipe rest 3 is integrally cast from concrete and includes a base plate 301. One end of the base plate 301 has a protrusion 302, and the other end has a groove 303. The protrusion 302 and the groove 303 are embedded and fitted together. The top surface of the base plate 301 has a support 304, and the top surface of the support 304 has an arc-shaped groove 305. The base plate 301 has a lifting port. The arc-shaped groove 305 on the top surface of the support 304 is fitted with the drainage pipe 4 for limiting. One end of the drainage pipe 4 has a spigot, and the other end has a socket, which are fitted together.

[0037] Based on the structure of the aforementioned fully prefabricated concrete drainage pipes, such as Figure 2 As shown in the figure, this embodiment discloses a fully prefabricated concrete drainage pipe rapid construction equipment. This rapid construction equipment mainly completes the hoisting, docking, and tightening of the docked pipes 4. The structure of this rapid construction equipment mainly includes a pipe hoisting tool 1 and a pipe tightening machine 2.

[0038] like Figure 3 As shown, the pipe lifting device 1 includes an upper lifting arm 101 and a lower lifting arm 102. The upper lifting arm 101 and the lower lifting arm 102 are arranged in parallel, and one end of the upper lifting arm 101 and the lower lifting arm 102 are connected by a connecting arm 103. Multiple lifting holes 101-1 are opened on the upper lifting arm 101, and an arc-shaped support plate 102-1 that fits against the inner wall of the pipe is provided on the lower lifting arm 102.

[0039] A crossbeam support 104 is installed below the lower boom 102. The crossbeam support 104 includes a crossbeam 104-1, with hanging points 104-2 at both ends of the crossbeam 104-1. The hanging points 104-2 are connected to the wire rope 5. A transition arm 104-3 is installed at the top of the crossbeam 104-1, and the transition arm 104-3 is connected to the lower boom 102.

[0040] To prevent damage to the drainage pipe 4 during hoisting and pulling, in this embodiment, rubber pads are provided on the contact and pressing surfaces of the arc-shaped clamp 202-1 and the pipe, as well as on the contact and pressing surfaces of the crossbeam 104-1 and the pipe.

[0041] like Figure 1 and 4As shown, the pipe tightening machine 2 includes a gantry frame 201, a pipe clamping mechanism 202 is provided in the gantry frame 201, a self-moving mechanism 203 is provided at the bottom of the gantry frame 201, and a pulling device 204 is provided on the gantry frame 201. The movable end of the pulling device 204 is connected to the end of the crossbeam stop 104 through a steel wire rope 5.

[0042] like Figure 4 and 5 As shown, the pipe clamping mechanism 202 includes two symmetrically arranged arc-shaped clamping plates 202-1. A clamping arm 202-2 is provided on the upper edge of the arc-shaped clamping plate 202-1. The clamping arm 202-2 is hinged to the top of the portal frame 201. A clamping cylinder 202-3 is provided on the outer side of the arc-shaped clamping plate 202-1. One end of the clamping cylinder 202-3 is hinged to the arc-shaped clamping plate 202-1, and the other end is hinged to the side of the portal frame 201.

[0043] The self-moving mechanism 203 includes two connecting seats 203-1, which are fixedly connected to the side of the portal frame 201 at intervals. Each connecting seat 203-1 is equipped with a vertically arranged height adjustment cylinder 203-2. Each height adjustment cylinder 203-2 has a roller frame 203-3 at its lower end. The two roller frames 203-3 cooperate with the same I-shaped guide rail 203-4 below. Rollers 203-5 are rolled in the slots on both sides of the I-shaped guide rail 203-4. The rollers 203-5 are rotatably connected to the corresponding roller frames 203-3. A pushing cylinder 203-6 is provided on the outer side of the rear roller frame 203-3. One end of the pushing cylinder 203-6 is hinged to the roller frame 203-3, and the other end is hinged to the I-shaped guide rail 203-4.

[0044] The pulling device 204 includes two drag cylinders 204-1, which are respectively arranged on both sides of the gantry frame 201.

[0045] The working principle of the pipe tightening machine 2 is as follows: After the drainage pipe 4 is lifted into place by the pipe hanger 1, the pipe clamping mechanism 202 clamps the previously assembled pipe to improve the stability of the pipe tightening machine 2. At the same time, the pulling device 204 slowly tightens the steel wire rope 5, which drives the cross beam 104-1 to slowly pull the pipe backward and slowly connect it tightly with the installed pipe. After the pipe connection is completed and secure, the pipe lifter 1 is used to lift the next pipe. At the same time, the retraction of the height adjustment cylinder 203-2 of the self-moving mechanism 203 drives the I-shaped guide rail 203-4 to rise. Then, the push cylinder 203-6 retracts, driving the I-shaped guide rail 203-4 forward. After the I-shaped guide rail 203-4 is in place, the height adjustment cylinder 203-2 extends so that the I-shaped guide rail 203-4 abuts against the integrated pipe support 3. Then, the pipe clamping mechanism 202 is released. Next, the push cylinder 203-6 extends to push the gantry frame 201 forward as a whole, preparing for the next tight pipe connection.

[0046] During the process of the pulling device 204 slowly tightening the wire rope 5, in order to improve the stability of the pipe tightening machine 2, in this embodiment, a baffle 205 is provided at the rear end of the I-shaped guide rail 203-4. The baffle 205 is arranged perpendicularly to the I-shaped guide rail 203-4 and is hinged to the I-shaped guide rail 203-4. When the I-shaped guide rail 203-4 moves into position, the baffle 205 is flipped inward, and the baffle 205 can abut against the pillow support 304.

[0047] Based on the aforementioned fully prefabricated concrete drainage pipes and rapid construction equipment, such as Figure 6 As shown, this embodiment also discloses a rapid construction method for fully prefabricated concrete drainage pipes, which includes the following steps:

[0048] Step 1: Construction Preparation

[0049] Before construction, conduct a joint review of the construction drawings, prepare the construction organization design and conduct handover work; inspect and accept raw materials and semi-finished products, and promptly remove and replace unqualified materials and semi-finished products; inspect the mechanical equipment used on site to ensure that it is operating without problems.

[0050] Step 2: Surveying, setting out, and excavating trenches.

[0051] Based on the construction design drawings, on-site geological conditions and site conditions, the surveyors marked the excavation boundary line, sprinkled lime lines, drove wooden stakes at the four corners of the top opening, and marked the excavation depth before excavation. The excavation of the well chamber and the trench were carried out simultaneously. The center position of the well chamber structure was measured and marked using the polar coordinate method according to the coordinates of the well chamber pile number. The top opening line of the structure excavation and the excavation elevation control stakes were measured and marked according to the well chamber size, and the stakes were driven at the same time.

[0052] The trench is 1m 3Excavation is carried out using a combination of backhoe excavators and manual labor. For trenches less than 3 meters deep, slope excavation is employed, with the specific slope and trench support method determined based on geological and surrounding conditions. For trenches between 3 and 5 meters deep, a specialized plan should be prepared, and excavation should proceed according to the plan approved by the company's technical manager and chief supervising engineer. When the trench depth exceeds 5 meters, a specialized plan needs to be prepared and reviewed by experts. The approved plan should be revised based on the experts' opinions before excavation. During mechanical excavation, a soil layer of approximately 20 cm should be left for manual excavation and trimming to the design elevation to ensure that the soil structure at the bottom of the trench is not disturbed or over-excavated. The elevation and width of the trench bottom should be carefully controlled to prevent over-excavation.

[0053] Step 3, Pipe base treatment

[0054] After the trench excavation and manual leveling are completed, a foundation bearing capacity test must be conducted. The characteristic value of the pipeline foundation bearing capacity should not be less than the requirements of the design drawings. Once the foundation bearing capacity meets the requirements, the next construction procedure can proceed. If the bearing capacity requirement does not meet the standard, the foundation needs to be treated. When the pipeline is located below the groundwater level, a rubble cushion layer can be used. The rubble is laid in layers and compacted. The thickness of the foundation treatment is 40cm, the same width as the foundation. After the foundation treatment, the bearing capacity should meet the foundation bearing capacity requirements. When the pipeline is located in a layer of miscellaneous fill, all the miscellaneous fill must be excavated and replaced with plain soil. Frozen soil and topsoil must not be used for replacement. After replacement, the compaction degree should not be less than 95%. The characteristic value of the foundation bearing capacity after treatment should meet the foundation bearing capacity requirements.

[0055] Step 4: Leveling the sand cushion layer

[0056] The sand used for the sand cushion layer should meet the design requirements, using qualified river sand. The width of the sand cushion layer is determined according to the width of the integrated drainage pipe sleeper. The surveyor sets up control stakes and hangs lines based on the center stake position. The sand cushion layer formwork is erected using 6m aluminum alloy square tubing (30×20×1mm), which also serves as the sand cushion layer leveling controller. The specific method for the sand cushion layer leveling controller is to weld nuts to the aluminum alloy horizontal bars to fix the length (adjustable according to the width of the sand cushion layer; one set of molds can be used for various pipe diameters). Two vertical bars are placed as longitudinal templates according to the width requirements, and the vertical bars are fixed into a rectangle by nuts on the horizontal bars. Using this sand cushion layer leveling controller, a 6m long pipe sleeper sand cushion layer formwork is erected at once. Then, sand is evenly spread inside the formwork, and then manually leveled using a spirit level. The above operations are repeated to complete the sand cushion layer construction.

[0057] Step 5: Integrated pipe sleeper construction

[0058] The project team procured prefabricated pipe supports manufactured in a factory for on-site assembly. During installation, only hoisting and laying are required, eliminating the need for on-site pouring, thus saving considerable time and significantly improving work efficiency and shortening the construction period. The results are remarkable. Using prefabricated components greatly reduced on-site construction difficulty and the labor intensity for workers. It also saved significant labor costs and the cost of using large machinery. Specific operational points are as follows:

[0059] A 25t truck crane will be used for lifting. Before lifting, the lifting and transportation route will be determined to ensure the accessibility of the transport vehicles. The crane must have a factory certificate of conformity or vehicle registration certificate and a valid safety inspection certificate. The crane operator must have a valid operating certificate. No personnel are allowed to stand within the lifting radius during lifting; warning lines must be set up in advance, and a dedicated safety officer will supervise the process on-site. A new type of installation tool will be used to clamp onto the pre-reserved lifting port of the integrated pipe sleeper. A trial lift must be conducted before the formal lifting. During the trial lift, the stability of the crane outriggers, the evenness of the tension on the wire rope sleeve, the levelness of the pipe sleeper during lifting, and the load distribution of the crane will be checked. Formal lifting can only proceed if no problems are found. After the crane lifts the pipe sleeper, the on-site commander directs the lowering of the cover plate. When the pipe sleeper is about 1.5m away from the leveling layer, the lowering speed is reduced to allow the pipe sleeper to fall slowly. The position of the pipe sleeper is adjusted, and when it is about 50cm away from the leveling layer, it is manually fine-tuned. After the fine-tuning is completed, the installers fix the position of the pipe sleeper to ensure that the pipe sleeper is accurately placed in the designated position.

[0060] After the pipe sleeper is in place, check the elevation of the top surface of the pipe sleeper (the bottom of the drainage pipe minus the pipe wall thickness). For the higher parts, use a small flat plate tamping machine to ensure the accuracy of the drainage pipe elevation and its close contact with the sand cushion layer. The requirement is met if the settlement difference at the same point after two consecutive tampings is within 2mm.

[0061] Step Six: Installation of Concrete Drainage Pipes and Manholes

[0062] The drainage pipe 4 is hoisted using pipe hoisting tool 1. When the pipe is lowered to about 50cm above the pipe support, the construction personnel assist in temporarily centering and positioning it. The drainage pipe 4 is connected using pipe tightening machine 2. The steel wire rope 5 is slowly tightened by pulling device 204, which drives the crossbeam bracket 104 to slowly pull the pipe backward, so that it is slowly and tightly connected with the installed pipe.

[0063] Before installing the precast manhole, excavation of the manhole is required. During excavation, the manhole pit and pipe trench should be constructed simultaneously. The elevation of the bottom of the pipeline and the bottom of the manhole should be controlled according to the design drawings, ensuring that the pipeline's central axis does not deviate from the center of the manhole base. The slope of the manhole excavation should be consistent with that of the pipe trench, and over-excavation should be avoided to prevent disturbance of the foundation soil. If it is the rainy season or the groundwater level is high in the excavation area, drainage should be carried out simultaneously during excavation to lower the water level. When excavation reaches 200-300mm from the design elevation, mechanical excavation should be stopped, and the trench should be manually cleared until the design elevation is reached. A foundation bearing capacity test should be conducted immediately after excavation. Subsequent construction can only proceed after confirming that the foundation bearing capacity is higher than 100kPa.

[0064] After the excavation foundation of the precast manhole has passed the on-site supervision and acceptance, the subbase can be constructed. After wetting the foundation trench with water, high-turnover prefabricated steel formwork is used for formwork erection, and the subbase concrete is poured, ensuring its flatness. Then, the modular manholes are hoisted in place. The modular manholes are then assembled as follows: Figure 6 As shown.

[0065] For the installation of prefabricated manholes, it is important to note that after the foundation layer has passed strength testing, the plane position of the pipe center should be measured using a total station and marked with an ink line. A freight crane should be used on-site for the hoisting of the prefabricated concrete manhole modules. When hoisting the lower manhole module, care should be taken to ensure the manhole wall is vertical and the base is placed horizontally in the pit. Simultaneously, it should be confirmed that the reserved interface landing position matches the pre-installation positioning of the water supply and drainage pipes. After confirmation, the lower manhole should be placed on the foundation layer surface. When hoisting the upper and lower manholes, the contact surface should be sealed with 1:2 waterproof mortar. During hoisting operations, 4-6 workers should be on-site, with 1-2 people responsible for the hooks along the trench edge and 2-4 people responsible for adjusting the orientation within the trench.

[0066] Before pipe connection, waterproof mortar should be evenly applied within a 120° range of the lower section. The walls of the pre-reserved opening in the manhole and the pipe itself should be moistened with clean water. When connecting the pipe to the lower manhole module, ensure the outer edge of the module is flush with the manhole wall, and insert the sleeve aligned with the center of the pipe, ensuring no eccentric displacement and uniform outer gaps. After the pipe is successfully connected to the pre-reserved opening in the manhole, fill it with waterproof mortar up to the sides and top of the pipe; tamp it down to ensure fullness, create a triangular joint with a width of 50-60mm, and finally squeeze the pipe until mortar overflows, ensuring compaction. When sealing the joints, use 1:2 waterproof mortar (strength ≥5MPa) for caulking, with a thickness controlled at 10-15mm. After caulking, repeatedly apply 2-3 coats of JS composite waterproof coating to the surface.

[0067] Step 7: Backfilling with fluidized solidified soil

[0068] Fluidized solidified soil is made by mixing waste mud with a certain proportion of solidifying agent and water to achieve a certain fluidity. Backfilling foundation trenches with solidified mud can solve problems encountered when using lime (plain) soil for backfilling, such as high soil requirements, small working area leading to high compaction difficulty, unstable compaction quality, poor interface with the foundation structure, and the inability to prevent water collapse after dry construction. After the solidified mud mixture is poured, no large machinery is needed for compaction, saving construction costs.

[0069] The site for the trial mixing of fluidized solidified soil was established. Slurry from the underground passage was taken to test the mix proportion of the solidified soil. Large-scale production was carried out only when the sample met the construction requirements.

[0070] The foundation trench is cleaned, and the bottom of the trench is thoroughly cleaned to remove all debris. After determining the backfill sections according to the construction plan, GPS is used to mark the positioning lines to confirm the sections. Then, based on the solidified soil filling process and the backfill area, formwork is erected in layers, with each layer not exceeding 2m. Wooden formwork is used, and the support system uses 40×90 timber and 48-type steel pipes. The formwork thickness is 15mm, with steel pipes as the main joists and timber as the secondary joists, spaced 200mm apart. A double-row steel pipe frame is erected outside the formwork as the formwork support system, with sufficient diagonal bracing on the outer side, spaced 2m horizontally. The formwork thickness is 15mm, with steel pipes as the main joists and timber as the secondary joists, spaced 200mm apart.

[0071] The fluidized solidified soil is poured evenly into the erected formwork in layers and sections using a chute. The surface is then leveled. After the bottom layer is completed and the solidified soil has reached a strength suitable for walking, the next layer of solidified soil can be applied. After the surface layer is completed, it is leveled with a special tool.

[0072] Protect the finished product on site. It is strictly forbidden to dump construction waste into the finished surface or allow people to work on it. Wait until the strength meets the requirements before pouring the next layer, until the design elevation is reached.

[0073] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A rapid construction equipment for fully prefabricated concrete drainage pipes, characterized in that, include: Pipe lifting device (1), the pipe lifting device (1) includes an upper lifting arm (101) and a lower lifting arm (102), the upper lifting arm (101) and the lower lifting arm (102) are arranged in parallel, and one end of the upper lifting arm (101) and the lower lifting arm (102) are connected by a connecting arm (103), and a crossbeam stop (104) is provided below the lower lifting arm (102); Pipe tightening machine (2), the pipe tightening machine (2) includes a gantry frame (201), a pipe clamping mechanism (202) is provided in the gantry frame (201), a self-moving mechanism (203) is provided at the bottom of the gantry frame (201), a pulling device (204) is provided on the gantry frame (201), and the movable end of the pulling device (204) is connected to the end of the crossbeam stop (104) through a steel wire rope (5); The self-moving mechanism (203) includes two connecting seats (203-1), which are fixedly connected to the side of the portal frame (201) at intervals. Each connecting seat (203-1) is provided with a vertically arranged height adjustment cylinder (203-2). Each height adjustment cylinder (203-2) is provided with a roller frame (203-3) at its lower end. The two roller frames (203-3) cooperate with the same I-shaped guide rail (203-4) below. Rollers (203-5) are rolled in the slots on both sides of the I-shaped guide rail (203-4). The rollers (203-5) are rotatably connected to the corresponding roller frame (203-3). A push cylinder (203-6) is provided on the outer side of the roller frame (203-3) located at the rear. One end of the push cylinder (203-6) is hinged to the roller frame (203-3), and the other end is hinged to the I-shaped guide rail (203-4).

2. The fully prefabricated concrete drainage pipeline rapid construction equipment according to claim 1, characterized in that: The upper boom (101) is provided with multiple lifting holes (101-1), and the lower boom (102) is provided with an arc-shaped support plate (102-1) that fits against the inner wall of the pipe.

3. The rapid construction equipment for fully prefabricated concrete drainage pipes according to claim 2, characterized in that: The crossbeam support (104) includes a crossbeam (104-1), both ends of which are provided with hanging points (104-2), and the top of the crossbeam (104-1) is provided with a transition arm (104-3), which is connected to the lower boom (102).

4. The fully prefabricated concrete drainage pipeline rapid construction equipment according to claim 3, characterized in that: A rubber pad is provided on the contact and pressure surface between the cross beam (104-1) and the pipeline.

5. The rapid construction equipment for fully prefabricated concrete drainage pipes according to claim 1, characterized in that: The pipe clamping mechanism (202) includes two symmetrically arranged arc-shaped clamping plates (202-1). A clamping arm (202-2) is provided on the upper edge of the arc-shaped clamping plate (202-1). The clamping arm (202-2) is hinged to the top of the gantry frame (201). A clamping cylinder (202-3) is provided on the outer side of the arc-shaped clamping plate (202-1). One end of the clamping cylinder (202-3) is hinged to the arc-shaped clamping plate (202-1), and the other end is hinged to the side of the gantry frame (201).

6. The rapid construction equipment for fully prefabricated concrete drainage pipes according to claim 5, characterized in that: A rubber pad is provided on the contact and pressing surface of the arc-shaped clamp (202-1).

7. The rapid construction equipment for fully prefabricated concrete drainage pipes according to claim 1, characterized in that: A baffle (205) is provided at the rear end of the I-shaped guide rail (203-4). The baffle (205) is arranged perpendicularly to the I-shaped guide rail (203-4) and is hinged to the I-shaped guide rail (203-4).

8. The rapid construction equipment for fully prefabricated concrete drainage pipes according to claim 1, characterized in that: The pulling device (204) includes two drag cylinders (204-1), which are respectively arranged on both sides of the gantry frame (201).

9. A rapid construction method for fully prefabricated concrete drainage pipes, comprising the rapid construction equipment for fully prefabricated concrete drainage pipes as described in any one of claims 1 to 8, characterized in that: The construction method includes the following steps: Step 1: Construction preparation. Before construction, review the construction drawings, prepare the construction organization design and conduct handover work; inspect and accept raw materials and semi-finished products, and promptly remove unqualified materials and semi-finished products from the site for replacement; inspect the mechanical equipment used on site to ensure that it is operating without problems. Step two: Surveying and setting out the trench. Based on the construction design drawings, on-site geological conditions and site conditions, the surveyors set out the excavation boundary line before excavation, sprinkle lime lines, drive wooden stakes at the four corners of the top opening, and mark the excavation depth. The excavation of the well chamber and the trench are carried out simultaneously. The center position of the well chamber structure is measured and set out using the polar coordinate method according to the coordinates of the well chamber station number. The top line of the structure excavation and the excavation elevation control stakes are measured and set out according to the well chamber size. At the same time, the stakes are driven. Step 3: Pipe foundation treatment. After the trench excavation and manual leveling are completed, a foundation bearing capacity test must be conducted. The characteristic value of the pipeline foundation bearing capacity should not be less than the requirements of the design drawings. Once the foundation bearing capacity meets the requirements, the next construction procedure can proceed. If the bearing capacity requirement does not meet the standard, the foundation needs to be treated. When the pipeline is located below the groundwater level, a rubble cushion layer can be used. The rubble is laid in layers and compacted. The thickness of the foundation treatment is 40cm, the same width as the foundation. After the foundation treatment, the bearing capacity should meet the foundation bearing capacity requirements. When the pipeline is located in a layer of miscellaneous fill, all the miscellaneous fill must be excavated and replaced with plain soil. Frozen soil and topsoil must not be used for replacement. After replacement, the compaction degree should not be less than 95%. The characteristic value of the foundation bearing capacity after treatment should meet the foundation bearing capacity requirements. Step 4: Leveling the sand cushion layer. The sand used for the sand cushion layer should meet the design requirements. Use qualified river sand. Determine the width of the sand cushion layer according to the width of the integrated drainage pipe sleeper. The surveyor sets up control stakes and hangs lines according to the center stake position. Spread sand evenly inside the formwork and then level it manually with a spirit level. Step 5, construction of integrated pipe sleeper: use the reserved hoisting port on the integrated pipe sleeper (3) to hoist the pipe sleeper. After the pipe sleeper is in place, check the elevation of the top surface of the pipe sleeper. For the high part, use a small flat plate tamping machine to ensure the accuracy of the elevation of the drainage pipe and to ensure that it is closely attached to the sand cushion layer. Step 6, concrete drainage pipe installation: The drainage pipe (4) is hoisted using the pipe hoisting tool (1). When the pipe is lowered to about 50cm above the pipe support, the construction personnel assist in temporarily centering and positioning it. The drainage pipe (4) is connected using the pipe tightening machine (2). The steel wire rope (5) is slowly tightened by the pulling device (204), which drives the crossbeam support (104) to slowly pull the pipe backward and slowly connect it tightly with the installed pipe. Step 7: Backfilling with fluidized solidified soil. Use a chute to pour the fluidized solidified soil in layers and sections evenly into the erected templates. Smooth the surface. After the bottom layer is completed, wait until the solidified soil reaches a strength that allows people to walk on it before proceeding with the next layer of solidified soil. After the surface layer is completed, use a special tool to smooth it.

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