An open-type pipe jacking construction device in soil

Abstract

This utility model discloses an open-type pipe jacking construction device in soil layers, including a movable base. A high-pressure manual pump and a hydraulic cylinder are mounted on the upper surface of the movable base. The hydraulic cylinder is connected to the high-pressure manual pump via a conduit. The high-pressure manual pump drives the hydraulic cylinder, which in turn drives the pipe head to create a gap between the pipe head and the adjacent concrete pipe. Multiple steel plates are mounted on one side of the movable base, detachably connected to it. These steel plates are inserted into the gap between the pipe head and the adjacent concrete pipe. This utility model uses a high-pressure manual pump and a hydraulic cylinder. The hydraulic cylinder is installed at the correction port of the pipe head. The high-pressure manual pump drives the hydraulic cylinder to extend, creating a gap between the pipe head and the adjacent concrete pipe. A certain number of steel plates are then stacked and inserted into the gap. Afterward, the hydraulic cylinder is disassembled, and the pipe jacking equipment is started to jack the pipe, following the guide line of the steel plates.

Description

Technical Field

[0001] This utility model relates to the field of pipe jacking construction technology, specifically to a pipe jacking construction device in open soil layers. Background Technology

[0002] Pipe jacking is a trenchless pipeline construction technology. It primarily utilizes jacking equipment to generate forward force, balancing the friction between the pipe and the soil, allowing the pipe to advance. Simultaneously, it requires displacing the soil occupied by the pipe, ultimately forming a pipeline within the soil. Pipe jacking construction relies heavily on the jacking equipment; its installation, commissioning, and operation are crucial to the quality of the final pipeline. (See attached image) Figure 1 The diagram shown is a schematic of existing pipe jacking construction methods. This method is prone to causing pipe head misalignment during pipe jacking (as shown in the attached diagram). Figure 2 As shown in the figure, this causes the pipe jacking construction to be unable to proceed along the set route, at which point it is necessary to correct the deviation of the machine head pipe.

[0003] Traditional pipe jacking correction methods include padding, jacking, and support. All of these methods require a support point at the front end of the jacking head pipe. However, in actual construction, some geological strata are medium sand layers. These strata have low bearing capacity and shear strength, and are prone to liquefaction and rheological changes, leading to problems such as pipe wall collapse and pipe deviation during installation. This not only increases the risk of road surface collapse caused by pipe jacking but may also damage surrounding buildings and facilities, reduce construction efficiency, and affect the construction period. Therefore, correcting the pipe head pipe during pipe jacking construction is crucial. Existing correction methods all require a support point at the front end of the jacking head pipe. When the geological strata are medium to fine sand, there is no suitable stress point at the front end, making the commonly used pipe jacking correction methods unsuitable for this type of stratum. Therefore, there is an urgent need in the market for a pipe jacking correction device that can be used in medium to fine sand strata. Utility Model Content

[0004] The purpose of this utility model is to provide an open-type pipe jacking construction device in soil layers, which aims to improve the problem that existing methods or tools for correcting the deviation of the pipe head are not suitable for construction environments with medium and fine sand strata, resulting in the difficulty of correcting deviations during pipe jacking construction in medium and fine sand strata.

[0005] This utility model is implemented as follows:

[0006] An open-type pipe jacking construction device in soil includes a movable base. A high-pressure manual pump and a hydraulic cylinder are provided on the upper surface of the movable base. The hydraulic cylinder is connected to the high-pressure manual pump through a conduit. The high-pressure manual pump is used to drive the hydraulic cylinder, which drives the head pipe to create a gap between the head pipe and the adjacent concrete pipe. Multiple steel plates are provided on one side of the movable base. The steel plates are detachably connected to the movable base and are used to insert into the gap created between the head pipe and the adjacent concrete pipe.

[0007] Preferably, the upper surface of the movable base is provided with symmetrical diagonal braces on both sides, and a handle is provided at the top between the two diagonal braces; hooks are provided on the sides of the diagonal braces.

[0008] Preferably, the movable base is provided with casters at the bottom corners, the casters are provided with brake pads, the upper surface of the movable base is provided with a limiting cylinder, and the limiting cylinder is provided with a notch.

[0009] Preferably, the high-pressure manual pump is provided with a pressing rod for driving the high-pressure manual pump, and the output end of the high-pressure manual pump is provided with a pipe joint, which is connected to a conduit.

[0010] Preferably, the high-pressure manual pump is provided with a pressure gauge above the pipe joint, and the high-pressure manual pump is provided with fixed feet at both the front and rear ends of the bottom. The fixed feet are provided with bolt holes on both sides for fixing the high-pressure manual pump to the movable base with bolts.

[0011] Preferably, the hydraulic cylinder output end is provided with a piston rod, and the bottom side of the hydraulic cylinder is provided with a connector, which is connected to a conduit.

[0012] Preferably, the multiple steel plates are connected by lifting rings, which are hung on hooks.

[0013] Preferably, the device also includes a sleeve, the side of which is provided with a set screw, the set screw abutting against the side of the hydraulic cylinder, and the sleeve is provided with a handle for the convenience of the operator to operate the hydraulic cylinder.

[0014] Preferably, it also includes a pressure plate, the piston rod has a threaded groove at the top end, and the bottom end of the pressure plate is threadedly connected to the threaded groove.

[0015] Preferably, the upper surface of the pressure plate is provided with a rubber pad, and the bottom surface of the pressure plate is provided with a stud, which is threadedly connected to the threaded groove.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model uses a high-pressure manual pump and a hydraulic cylinder. The hydraulic cylinder is installed at the correction port of the head pipe. The high-pressure manual pump drives the hydraulic cylinder to extend, creating a gap between the head pipe and the adjacent concrete pipe. A certain number of steel plates are then stacked and inserted into the gap. After that, the hydraulic cylinder is removed, and the pipe jacking equipment is started to jack the pipe. The misaligned head pipe will gradually return to the normal path along the auxiliary line of the steel plates. Once the head pipe is no longer misaligned, the steel plates can be removed to allow the head pipe to continue advancing along the planned path.

[0018] 2. This utility model features a sleeve fitted around the outside of the hydraulic cylinder, with a handle on the sleeve. This makes it convenient for workers to hold the hydraulic cylinder, thus facilitating its handling and operation for correcting the alignment of the machine head tube.

[0019] 3. This utility model provides a pressure plate at the output end of the hydraulic cylinder, which reduces the pressure and prevents the output end of the calendering cylinder from crushing or damaging the concrete pipe. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the existing pipe jacking construction method of this utility model;

[0021] Figure 2 This is a schematic diagram of the existing construction method of this utility model where the jacking pipe deviates during construction;

[0022] Figure 3 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the movable base of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the high-pressure manual pump of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the hydraulic cylinder of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the steel plate of this utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the sleeve of this utility model;

[0028] Figure 9 This is a schematic diagram of the pressure plate of this utility model.

[0029] In the diagram: 1. Movable base; 11. Diagonal brace; 12. Handle; 13. Caster wheel; 14. Brake pad; 15. Limiting sleeve; 16. Notch; 17. Hook; 2. High-pressure manual pump; 21. Pressing rod; 22. Pressure gauge; 23. Pipe connector; 24. Fixed foot; 25. Bolt hole; 3. Hydraulic cylinder; 31. Piston rod; 32. Threaded groove; 33. Connector; 34. Guide tube; 4. Steel plate; 41. Lifting ring; 5. Sleeve; 51. Handle; 52. Set screw; 6. Pressure plate; 61. Rubber pad; 62. Stud. Detailed Implementation

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0032] Example 1

[0033] like Figure 3 and Figure 6 As shown, an open-type pipe jacking construction device in soil includes a movable base 1. The movable base 1 facilitates the flexible use of the entire device, making it easy to move the entire device inside the pipe jacking section, thus simplifying its operation and reducing the physical exertion of workers. A high-pressure manual pump 2 and a hydraulic cylinder 3 are mounted on the upper surface of the movable base 1. The hydraulic cylinder 3 is connected to the high-pressure manual pump 2 via a conduit 34. The high-pressure manual pump 2 drives the hydraulic cylinder 3, facilitating its placement inside the correction port. The hydraulic cylinder 3, through its drive, creates a gap between the head pipe and the adjacent concrete pipe. Multiple steel plates 4 are mounted on one side of the movable base 1. The steel plates 4 are detachably connected to the movable base 1 and are used to insert into the gap between the head pipe and the adjacent concrete pipe. This allows the head pipe to gradually return to its normal trajectory during continued jacking.

[0034] like Figure 4As shown, symmetrical diagonal braces 11 are provided on both sides of the upper surface of the movable base 1, and a handle 12 is provided at the top between the two diagonal braces 11. The diagonal braces 11 and the handle 12 facilitate the movement of the entire movable base 1, making it convenient to use. Hooks 17 are provided on the sides of the diagonal braces 11, which are used to hang the steel plate 4, ensuring that the steel plate 4 is easy to pick up and use. Universal wheels 13 are provided at the corners of the bottom surface of the movable base 1, which facilitate the flexible movement of the movable base 1. Brake pads 14 are provided on the universal wheels 13, which are used to fix the position of the movable base 1, facilitating stable operation of the high-pressure manual pump 2. A limiting cylinder 15 is provided on the upper surface of the movable base 1, which is used to place the hydraulic cylinder 3, ensuring that the hydraulic cylinder 3 is stable inside the limiting cylinder 15. A notch 16 is provided on the limiting cylinder 15, which is used to prevent interference between the connector 33 and the limiting cylinder 15.

[0035] like Figure 5 As shown, the high-pressure manual pump 2 is equipped with a pressing rod 21 for driving the pump. The output end of the high-pressure manual pump 2 has a pipe connector 23, which connects to a conduit 34. The connection between the pipe connector 23 and the conduit 34 is convenient. A pressure gauge 22 is located above the pipe connector 23 on the high-pressure manual pump 2, which displays the pressure. The high-pressure manual pump 2 has fixing feet 24 at both the front and rear ends of its bottom. Bolt holes 25 are located on both sides of the fixing feet 24 for securing the high-pressure manual pump 2 to the movable base 1 with bolts, facilitating stable installation and use.

[0036] like Figure 6 As shown, the output end of the hydraulic cylinder 3 is equipped with a piston rod 31, which facilitates the extension and retraction of the hydraulic cylinder 3 to drive the machine head tube. Furthermore, the bottom side of the hydraulic cylinder 3 is equipped with a connector 33, which connects to a conduit 34, allowing the conduit 34 to connect the hydraulic cylinder 3 to the high-pressure manual pump 2.

[0037] like Figure 7 As shown, multiple steel plates 4 are connected by lifting rings 41, which are hung on hooks 17 for easy hanging and use of the steel plates 4.

[0038] Example 2

[0039] like Figure 3 and Figure 6As shown, an open-type pipe jacking construction device in soil includes a movable base 1. The movable base 1 facilitates the flexible use of the entire device, making it easy to move the entire device inside the pipe jacking section, thus simplifying its operation and reducing the physical exertion of workers. A high-pressure manual pump 2 and a hydraulic cylinder 3 are mounted on the upper surface of the movable base 1. The hydraulic cylinder 3 is connected to the high-pressure manual pump 2 via a conduit 34. The high-pressure manual pump 2 drives the hydraulic cylinder 3, facilitating its placement inside the correction port. The hydraulic cylinder 3, through its drive, creates a gap between the head pipe and the adjacent concrete pipe. Multiple steel plates 4 are mounted on one side of the movable base 1. The steel plates 4 are detachably connected to the movable base 1 and are used to insert into the gap between the head pipe and the adjacent concrete pipe. This allows the head pipe to gradually return to its normal trajectory during continued jacking.

[0040] like Figure 4 As shown, symmetrical diagonal braces 11 are provided on both sides of the upper surface of the movable base 1, and a handle 12 is provided at the top between the two diagonal braces 11. The diagonal braces 11 and the handle 12 facilitate the movement of the entire movable base 1, making it convenient to use. Hooks 17 are provided on the sides of the diagonal braces 11, which are used to hang the steel plate 4, ensuring that the steel plate 4 is easy to pick up and use. Universal wheels 13 are provided at the corners of the bottom surface of the movable base 1, which facilitate the flexible movement of the movable base 1. Brake pads 14 are provided on the universal wheels 13, which are used to fix the position of the movable base 1, facilitating stable operation of the high-pressure manual pump 2. A limiting cylinder 15 is provided on the upper surface of the movable base 1, which is used to place the hydraulic cylinder 3, ensuring that the hydraulic cylinder 3 is stable inside the limiting cylinder 15. A notch 16 is provided on the limiting cylinder 15, which is used to prevent interference between the connector 33 and the limiting cylinder 15.

[0041] like Figure 5 As shown, the high-pressure manual pump 2 is equipped with a pressing rod 21 for driving the pump. The output end of the high-pressure manual pump 2 has a pipe connector 23, which connects to a conduit 34. The connection between the pipe connector 23 and the conduit 34 is convenient. A pressure gauge 22 is located above the pipe connector 23 on the high-pressure manual pump 2, which displays the pressure. The high-pressure manual pump 2 has fixing feet 24 at both the front and rear ends of its bottom. Bolt holes 25 are located on both sides of the fixing feet 24 for securing the high-pressure manual pump 2 to the movable base 1 with bolts, facilitating stable installation and use.

[0042] like Figure 6 As shown, the output end of the hydraulic cylinder 3 is equipped with a piston rod 31, which facilitates the extension and retraction of the hydraulic cylinder 3 to drive the machine head tube. Furthermore, the bottom side of the hydraulic cylinder 3 is equipped with a connector 33, which connects to a conduit 34, allowing the conduit 34 to connect the hydraulic cylinder 3 to the high-pressure manual pump 2.

[0043] like Figure 7 As shown, multiple steel plates 4 are connected by lifting rings 41, which are hung on hooks 17 for easy hanging and use of the steel plates 4.

[0044] like Figure 3 and Figure 8 As shown, it also includes a sleeve 5, with a set screw 52 on its side. The set screw 52 abuts against the side of the hydraulic cylinder 3, facilitating a stable connection between the sleeve 5 and the hydraulic cylinder 3. The sleeve 5 is equipped with a handle 51 for easy operation of the hydraulic cylinder 3 by the operator.

[0045] Example 3

[0046] like Figure 3 and Figure 6 As shown, an open-type pipe jacking construction device in soil includes a movable base 1. The movable base 1 facilitates the flexible use of the entire device, making it easy to move the entire device inside the pipe jacking section, thus simplifying its operation and reducing the physical exertion of workers. A high-pressure manual pump 2 and a hydraulic cylinder 3 are mounted on the upper surface of the movable base 1. The hydraulic cylinder 3 is connected to the high-pressure manual pump 2 via a conduit 34. The high-pressure manual pump 2 drives the hydraulic cylinder 3, facilitating its placement inside the correction port. The hydraulic cylinder 3, through its drive, creates a gap between the head pipe and the adjacent concrete pipe. Multiple steel plates 4 are mounted on one side of the movable base 1. The steel plates 4 are detachably connected to the movable base 1 and are used to insert into the gap between the head pipe and the adjacent concrete pipe. This allows the head pipe to gradually return to its normal trajectory during continued jacking.

[0047] like Figure 4 As shown, symmetrical diagonal braces 11 are provided on both sides of the upper surface of the movable base 1, and a handle 12 is provided at the top between the two diagonal braces 11. The diagonal braces 11 and the handle 12 facilitate the movement of the entire movable base 1, making it convenient to use. Hooks 17 are provided on the sides of the diagonal braces 11, which are used to hang the steel plate 4, ensuring that the steel plate 4 is easy to pick up and use. Universal wheels 13 are provided at the corners of the bottom surface of the movable base 1, which facilitate the flexible movement of the movable base 1. Brake pads 14 are provided on the universal wheels 13, which are used to fix the position of the movable base 1, facilitating stable operation of the high-pressure manual pump 2. A limiting cylinder 15 is provided on the upper surface of the movable base 1, which is used to place the hydraulic cylinder 3, ensuring that the hydraulic cylinder 3 is stable inside the limiting cylinder 15. A notch 16 is provided on the limiting cylinder 15, which is used to prevent interference between the connector 33 and the limiting cylinder 15.

[0048] like Figure 5As shown, the high-pressure manual pump 2 is equipped with a pressing rod 21 for driving the pump. The output end of the high-pressure manual pump 2 has a pipe connector 23, which connects to a conduit 34. The connection between the pipe connector 23 and the conduit 34 is convenient. A pressure gauge 22 is located above the pipe connector 23 on the high-pressure manual pump 2, which displays the pressure. The high-pressure manual pump 2 has fixing feet 24 at both the front and rear ends of its bottom. Bolt holes 25 are located on both sides of the fixing feet 24 for securing the high-pressure manual pump 2 to the movable base 1 with bolts, facilitating stable installation and use.

[0049] like Figure 6 As shown, the output end of the hydraulic cylinder 3 is equipped with a piston rod 31, which facilitates the extension and retraction of the hydraulic cylinder 3 to drive the machine head tube. Furthermore, the bottom side of the hydraulic cylinder 3 is equipped with a connector 33, which connects to a conduit 34, allowing the conduit 34 to connect the hydraulic cylinder 3 to the high-pressure manual pump 2.

[0050] like Figure 7 As shown, multiple steel plates 4 are connected by lifting rings 41, which are hung on hooks 17 for easy hanging and use of the steel plates 4.

[0051] like Figure 3 and Figure 8 As shown, it also includes a sleeve 5, with a set screw 52 on its side. The set screw 52 abuts against the side of the hydraulic cylinder 3, facilitating a stable connection between the sleeve 5 and the hydraulic cylinder 3. The sleeve 5 is equipped with a handle 51 for easy operation of the hydraulic cylinder 3 by the operator.

[0052] like Figure 3 and Figure 6 As shown, it also includes a pressure plate 6, and the top of the piston rod 31 is provided with a threaded groove 32. The bottom end of the pressure plate 6 is threadedly connected to the threaded groove 32, which makes it convenient for the pressure plate 6 to be disassembled and assembled according to the usage requirements.

[0053] like Figure 9 As shown, the upper surface of the pressure plate 6 is provided with a rubber pad 61, which facilitates cushioning. The bottom surface of the pressure plate 6 is provided with a stud 62, which is threadedly connected to the threaded groove 32, making it convenient to disassemble and use the pressure plate 6.

[0054] Working principle: When the pipe deviates downwards (as shown in the attached diagram) Figure 2To correct the deviation of the pipeline, the following steps are required: First, measure the deviation of the pipeline axis and calculate the downward deviation angle ∠A between the central axis and the first pipeline. Then, set the angle ∠B between the cross-section of the machine head pipe and the vertical cross-section. Place a hydraulic cylinder 3 at the pre-reserved correction opening at the fork end of the machine head pipe. Use the hydraulic cylinder 3 to push the machine head pipe forward, creating a gap between the machine head pipe and the adjacent concrete pipe. When the gap in the lower cross-section reaches 4cm, place four steel plates 4, each 1cm thick. Then, raise the excavation elevation of the sand layer at the pipe head. After placing the steel plates 4, remove the hydraulic cylinder 3 and start using the main jacking cylinder. After pushing the pipe forward 30cm, remeasure and calculate the deviation, comparing the angles ∠A and ∠B. As the pipe jacking progresses deeper, the thrust from the rear jacking equipment gradually lifts the head pipe, causing the included angles ∠A and ∠B to gradually decrease. When the two angles approach zero, the correction steel plate 4 is removed. Pipe jacking continues, and with the operation of the jacking equipment, the pipe returns to its axial position, thus achieving the purpose of pipe correction in the sand layer.

[0055] When the pipeline deviates to the left, it needs to be corrected. First, measure the leftward deviation angle A1 based on the centerline of the jacking pipe and the centerline of the head pipe. Let B1 be the angle between the head pipe section and the vertical section. First, place the hydraulic cylinder 3 in the correction port reserved in the head pipe and push the head pipe forward. When a 4cm gap is formed in the left section, place and fix four steel plates 4, each 1cm thick, at the correction port of the head pipe. Remove the hydraulic cylinder 3 and let the jacking equipment start pushing. Measure the angle change between A1 and B1 every 30cm of pushing forward, and observe whether the angle gradually decreases and approaches 0. Once it is infinitely close to 0, remove the correction steel plates 4. At this point, the jacking correction is complete. The correction principle for pipeline deviation to the right is the same as for deviation to the left.

[0056] During the pipeline alignment process, it is essential to adhere to the principle of "increasing the number of alignments while decreasing the alignment angle." Each alignment should be performed at a rate of 1°, where tan1° × 2.4m (pipeline inner diameter) = 4.2cm. This is primarily to prevent excessively large alignment angles that could cause the pipeline to twist during the jacking process. Secondly, it avoids increasing friction during jacking due to large changes in the alignment angle, which would increase the difficulty of construction.

[0057] In summary, compared with the prior art, this application sets up a high-pressure manual pump 2 and a hydraulic cylinder 3. The hydraulic cylinder 3 is installed at the correction port of the head pipe. Then, the high-pressure manual pump 2 drives the hydraulic cylinder 3 to extend, so that a gap appears between the head pipe and the adjacent concrete pipe. Then, a certain number of steel plates 4 are stacked and inserted into the gap. After that, the hydraulic cylinder 3 is removed, and the pipe jacking equipment is started to jack the pipe urgently. On the auxiliary line of the steel plate 4, the misaligned head pipe will gradually return to the normal path. When the head pipe is no longer misaligned, the steel plate 4 can be removed so that the head pipe can continue to advance along the planned path.

[0058] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An open type pipe jacking construction device in soil layer, characterized by, The system includes a mobile base (1), on the upper surface of which is provided a high-pressure manual pump (2) and a hydraulic cylinder (3). The hydraulic cylinder (3) is connected to the high-pressure manual pump (2) through a conduit (34). The high-pressure manual pump (2) is used to drive the hydraulic cylinder (3). The hydraulic cylinder (3) drives the machine head pipe to create a gap between it and the adjacent concrete pipe. The mobile base (1) has multiple steel plates (4) on one side. The steel plates (4) are detachably connected to the mobile base (1). The steel plates (4) are used to be inserted into the gap created between the machine head pipe and the adjacent concrete pipe.

2. The open-topped in-ground pipe jacking apparatus of claim 1, wherein: The movable base (1) has symmetrical diagonal bracing rods (11) on both sides of its upper surface, and a handle (12) is provided at the top between the two diagonal bracing rods (11); hooks (17) are provided on the sides of the diagonal bracing rods (11).

3. The open-trench pipe-pushing construction device according to claim 2, wherein The movable base (1) is provided with casters (13) at the bottom corners, and brake pads (14) are provided on the casters (13). The upper surface of the movable base (1) is provided with a limiting cylinder (15), and a notch (16) is provided on the limiting cylinder (15).

4. The open-type pipe jacking construction device in soil as described in claim 1, characterized in that, The high-pressure manual pump (2) is provided with a pressing rod (21) for driving the high-pressure manual pump (2). The output end of the high-pressure manual pump (2) is provided with a pipe connector (23), which is connected to the conduit (34).

5. The open-trench pipe-pushing construction device according to claim 3, wherein The high-pressure manual pump (2) is equipped with a pressure gauge (22) above the pipe joint (23). The high-pressure manual pump (2) is equipped with fixed feet (24) at both the front and rear ends of the bottom. The fixed feet (24) are equipped with bolt holes (25) on both sides for fixing the high-pressure manual pump (2) on the movable base (1) with bolts.

6. The open-trench pipe-pushing construction device according to claim 1, wherein The hydraulic cylinder (3) has a piston rod (31) at its output end, and a connector (33) is provided at the bottom side of the hydraulic cylinder (3), which is connected to the conduit (34).

7. The open-trench pipe-pushing construction device according to claim 2, wherein The multiple steel plates (4) are connected by a lifting ring (41), which is hung on a hook (17).

8. The open-topped in-ground pipe jacking apparatus of any one of claims 1 to 7, wherein: It also includes a sleeve (5), which has a set screw (52) on its side. The set screw (52) abuts against the side of the hydraulic cylinder (3). The sleeve (5) has a handle (51) for the convenience of the operator to operate the hydraulic cylinder (3).

9. The open-trench pipe-pushing construction device according to claim 6, wherein It also includes a pressure plate (6), the piston rod (31) has a threaded groove (32) at the top end, and the bottom end of the pressure plate (6) is threadedly connected to the threaded groove (32).

10. The open-trench pipe-pushing construction device according to claim 9, wherein The upper surface of the pressure plate (6) is provided with a rubber pad (61), and the bottom surface of the pressure plate (6) is provided with a stud (62), which is threadedly connected to the threaded groove (32).

Images