Pipe jacking construction device and method based on artificial freezing technology

Abstract

The invention discloses a pipe jacking construction device and method based on an artificial freezing technology, and belongs to the technical field of pipe jacking construction, the pipe jacking construction device comprises a base, a side plate vertically fixed at the rear end of the base, hydraulic oil cylinders symmetrically mounted at the two ends of the inner side of the side plate, and a jacking table fixed between the output ends of the hydraulic oil cylinders. The strip-shaped grooves are evenly formed in the outer side edge of the top table in an annular array mode, the sliding bases are slidably arranged in the strip-shaped grooves, the hydraulic chucks are rotatably installed on the sliding bases, the hydraulic chucks can be used for fixing the drill rod during use, the drill rod is driven to rotate through the drilling motor, and therefore in the using process of the device, the drilling efficiency of the drill rod is improved. A drill rod can be inserted into soil, a hole for installing a freezing pipe is formed in the outer side of a pipe jacking channel so that the freezing pipe can be conveniently inserted and installed, the functionality of the device is improved, in addition, when the device is used, the interval adjusting mechanism is matched, the hole opening position during freezing pipe installation can be adjusted according to the outer diameter of the pipe jacking, and practicability is higher.

Description

Technical Field

[0001] This invention relates to a pipe jacking construction device, and more particularly to a pipe jacking construction device based on artificial freezing technology. This invention also relates to a construction method, and more particularly to a pipe jacking construction method based on artificial freezing technology, belonging to the field of pipe jacking construction technology. Background Technology

[0002] In the process of pipe jacking construction in water-rich soft strata, complex geological conditions, or environmentally sensitive areas, artificial freezing technology is used to form a water barrier and enhance the stability of the strata. This involves arranging freezing pipes around the pipe jacking and circulating low-temperature brine or liquid nitrogen to freeze the water in the soil into a high-strength frozen soil curtain before pipe jacking construction can proceed.

[0003] Current pipe jacking construction equipment only includes pipe jacking machines, jacks, grouting systems, etc. If artificial freezing is required, it is necessary to drill holes with other equipment and then cover the pipe jacking channel with freezing pipes. The functionality is low and the construction is inconvenient. In addition, during the pipe jacking hoisting and support process, manual correction of the hoisted pipe is required inside the starting shaft, which not only increases the labor force but also affects the construction speed.

[0004] To address this issue, a pipe jacking construction device and method based on artificial freezing technology were designed to optimize the aforementioned problems. Summary of the Invention

[0005] The main objective of this invention is to provide a pipe jacking construction device and method based on artificial freezing technology. The device features a ring-shaped array of uniformly spaced grooves on the outer side of the top platform, with sliding blocks slidably positioned inside these grooves. A hydraulic chuck is rotatably mounted on the sliding blocks, allowing the drill rod to be fixed in place during use. A drilling motor drives the drill rod to rotate, enabling the drill rod to be inserted into the soil. Holes for installing the freezing pipe are provided on the outer side of the pipe jacking channel, facilitating insertion and improving the device's functionality. Furthermore, a spacing adjustment mechanism consisting of a rotary motor, a first bevel gear, a second bevel gear, a first screw, and a first threaded hole allows for adjustment of the freezing pipe's installation position based on the pipe's outer diameter, enhancing practicality. Symmetrical guide support rods are also provided at the front end of the base. Combined with a telescopic assembly consisting of a slide rail, a first slide rod, a translation motor, a second screw, a second threaded hole, a rear end plate, a front end plate, a first slot, and a second slot, the telescopic assembly can control the telescopic sliding of the guide support rod during use, facilitating deployment during use and transportation after use, thus increasing its practicality. Furthermore, by providing a width adjustment assembly consisting of a straight guide groove, an inclined guide groove, and a cylindrical guide block between the top of the base and the guide support rod, the spacing of the guide support rods can be adjusted according to the diameter of the jacking pipe during use, improving the applicability of the device for transportation. In addition, by symmetrically setting vertical and diagonal rods on the outside of the guide support rods, the position of the jacking pipe can be automatically corrected during the downward hoisting process, ensuring that the jacking pipe is stably positioned between the two guide support rods when it falls. If manual adjustment is required, this increases the speed of jacking pipe docking and installation.

[0006] The objective of this invention can be achieved by adopting the following technical solution: A pipe jacking construction device based on artificial freezing technology includes a base, a side plate vertically fixed to the rear end of the base, hydraulic cylinders symmetrically installed at both ends of the inner side of the side plate, and a top platform fixed between the output ends of the hydraulic cylinders. The outer side of the top platform is evenly provided with strip grooves in a ring array. Slides are slidably installed inside the strip grooves along the length direction. Drilling motors are installed on the outer side of each slide. Hydraulic chucks are installed at the output end of each drilling motor. The top platform is provided with a spacing adjustment mechanism to control the simultaneous movement of the slides. The front end of the base is equipped with a support guide for supporting the top pipe and for position correction.

[0007] Preferably, four sets of strip grooves are provided, and the lines connecting the ends of the strip grooves form a cross shape, with the intersection of the lines connecting the ends of the strip grooves located at the center of the outer side of the top platform.

[0008] Preferably, the spacing adjustment mechanism includes a rotary motor, a first bevel gear, a second bevel gear, a first screw, and a first threaded hole. The rotary motor is installed in the middle position inside the top platform. The output end of the rotary motor is equipped with the first bevel gear. The outer side of the first bevel gear is uniformly meshed with the second bevel gear. The sides of the second bevel gear are all equipped with the first screw. The ends of the first screws all extend to the inner end of the strip groove. The first screws are rotatably installed inside the top platform. The first screws pass through the slide and are threadedly connected to the slide. The slide has a first threaded hole that mates with the first screw.

[0009] Preferably, reinforcing ribs are symmetrically arranged between the top of the base and the inner side of the side plate, and the shape of the reinforcing ribs is a right triangle.

[0010] Preferably, the support frame includes guide support rods, telescopic components, width adjustment components, and correction components. The guide support rods are symmetrically arranged on both sides of the front end of the base. The top of the base is provided with a telescopic component that controls the sliding of the guide support rods along the length direction of the base. A width adjustment component is provided between the guide support rods, and a correction component for the top tube is provided between the top of the guide support rods.

[0011] Preferably, the bottom of the top platform has symmetrically provided limit grooves at both ends, the top of the guide support rod fits into the top of the limit groove, and the inner side of the guide support rod is arc-shaped.

[0012] Preferably, the telescopic assembly includes a slide groove, a first slide rod, a translation motor, a second screw, a second threaded hole, a rear end plate, a front end plate, a first slot, a second slot, and a second slide rod. The slide groove is located at the middle of the base along its length. The first slide rod is slidably mounted inside the slide groove along its length. A translation motor is installed at the rear end of the base. A second screw is installed at the output end of the translation motor, and the second screw extends into the slide groove and is threadedly connected to the first slide rod. A second threaded hole is provided inside the first slide rod. The front end plate is vertically fixed to the end of the first slide rod away from the base. The rear end plate is vertically fixed to the top of the first slide rod away from the front end plate. The rear end plate fits against the top of the base. One end of each guide support rod has a first slot that mates with the rear end plate, and the other end of each guide support rod has a second slot that mates with the front end plate. The guide support rod is slidably connected to the front end plate and the rear end plate. Both ends of the front end plate are fixed with second slide rods that are slidably connected to the base.

[0013] Preferably, the width adjustment component includes a linear guide groove, an inclined guide groove, and a cylindrical guide block. The linear guide groove is opened parallel to both sides of the slide groove. The end of the linear guide groove away from the side plate is inclined to the outside. The linear guide groove and the inclined guide groove are connected. The cylindrical guide block is slidably installed inside the linear guide groove and the inclined guide groove. The top of the cylindrical guide block is fixedly connected to the guide support rod.

[0014] Preferably, the correction assembly includes a vertical rod and an inclined rod. The vertical rod is fixed vertically to the outside of the guide support rod, and the top of each vertical rod is inclined with an inclined rod. The inclined rods on the two sets of guide support rods are symmetrical to each other.

[0015] This invention also provides a pipe jacking construction method based on artificial freezing technology, comprising the following steps: Step 1: First, determine the location of the pipe jacking channel inside the starting well, and then determine the installation position of the freezing pipe on the outer side of the circumference of the pipe jacking channel; Step 2: Install the construction device inside the starting well and use the spacing adjustment mechanism to adjust the position of the hydraulic chuck so that the position of the hydraulic chuck is directly opposite the installation position of the freezing pipe. Then use the hydraulic chuck to fix the position of the drill pipe. Step 3: The drilling motor controls the rotation of the drill rod on the hydraulic chuck, and the hydraulic cylinder controls the forward movement of the drill rod to open a hole on the outside of the jacking pipe channel for the installation of the freezing pipe. Then the drill rod is taken out and the freezing pipe is installed. Step 4: Install the refrigeration unit, brine tank, and circulation pipeline; inject refrigerant into the inside of the freezing pipe to freeze the area of ​​the jacking pipe channel, forming a water barrier to enhance the stability of the formation; Step 5: The hoisting equipment hoists the jacking pipe downwards, the support guide is used to correct and support the position of the jacking pipe, and the hydraulic cylinder is started to push the jacking pipe forward; Step 6: Repeat the above steps until the entire pipe jacking section is completed.

[0016] The beneficial effects of this invention are as follows: This invention provides a pipe jacking construction device and method based on artificial freezing technology. The device features a ring-shaped array of uniformly spaced grooves on the outer side of the jacking platform, with a sliding seat slidably positioned inside each groove. A hydraulic chuck is rotatably mounted on the sliding seat, allowing the drill rod to be fixed in place during use. A drilling motor drives the drill rod to rotate, enabling the drill rod to be inserted into the soil. Holes for installing the freezing pipe are created on the outer side of the pipe jacking channel, facilitating insertion and improving the device's functionality. Furthermore, a spacing adjustment mechanism consisting of a rotary motor, a first bevel gear, a second bevel gear, a first screw, and a first threaded hole allows for adjustment of the freezing pipe's installation position based on the pipe's outer diameter, enhancing its practicality. By symmetrically arranging guide support rods at the front end of the base, and in conjunction with a telescopic assembly consisting of a sliding groove, a first sliding rod, a translation motor, a second screw, a second threaded hole, a rear end plate, a front end plate, a first slot, and a second slot, the telescopic assembly allows for control of the extension and retraction of the guide support rods during use. This facilitates deployment during use and transportation after use, enhancing practicality. Furthermore, a width adjustment assembly consisting of a straight guide groove, an inclined guide groove, and a cylindrical guide block, located between the top of the base and the guide support rods, allows for adjustment of the spacing between the guide support rods according to the diameter of the jacking pipe, improving the device's applicability and facilitating transportation. Additionally, symmetrically arranged vertical and diagonal rods on the outer side of the guide support rods automatically correct the position of the jacking pipe during downward hoisting, ensuring it is stably positioned between the two guide support rods when falling. If manual adjustment is required, this increases the speed of jacking pipe docking and installation. Attached Figure Description

[0017] Figure 1 This is a front view of a preferred embodiment of a pipe jacking construction device and construction method based on artificial freezing technology according to the present invention; Figure 2 This is a side view of the top platform of a preferred embodiment of a pipe jacking construction device and construction method based on artificial freezing technology according to the present invention; Figure 3 This is a side sectional view of the top platform of a preferred embodiment of a pipe jacking construction device and construction method based on artificial freezing technology according to the present invention; Figure 4 This is a top structural diagram of a sliding block in a preferred embodiment of a pipe jacking construction device and method based on artificial freezing technology according to the present invention. Figure 5 This is a structural diagram of a support guide frame in a preferred embodiment of a pipe jacking construction device and method based on artificial freezing technology according to the present invention. Figure 6 This is a top view of the base of a preferred embodiment of a pipe jacking construction device and construction method based on artificial freezing technology according to the present invention; Figure 7 This is a structural diagram of the first sliding rod in a preferred embodiment of a pipe jacking construction device and method based on artificial freezing technology according to the present invention. Figure 8 This is a structural diagram of a guide support rod in a preferred embodiment of a pipe jacking construction device and construction method based on artificial freezing technology according to the present invention.

[0018] In the diagram: 1. Base; 101. Side plate; 102. Hydraulic cylinder; 103. Top platform; 2. Slot; 3. Slide; 4. Drilling motor; 5. Hydraulic chuck; 6. Gap adjustment mechanism; 601. Rotary motor; 602. First bevel gear; 603. Second bevel gear; 604. First screw; 605. First threaded hole; 7. Supporting guide frame; 701. Guide support rod; 702. Limiting groove; 703. Slide groove; 704. First slide rod; 705. Translation motor; 706. Second screw; 707. Second threaded hole; 708. Rear end plate; 709. Front end plate; 710. First slot; 711. Second slot; 712. Second slide rod; 713. Linear guide groove; 714. Inclined guide groove; 715. Cylindrical guide block; 716. Vertical rod; 717. Diagonal rod. Detailed Implementation

[0019] To enable those skilled in the art to more clearly understand the technical solution of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0020] like Figures 1-8 As shown, this embodiment provides a pipe jacking construction device based on artificial freezing technology, including a base 1, a side plate 101 vertically fixed to the rear end of the base 1, hydraulic cylinders 102 symmetrically installed at both ends of the inner side of the side plate 101, and a top platform 103 fixed between the output ends of the hydraulic cylinders 102. The outer side of the top platform 103 is evenly provided with strip grooves 2 in a ring array. Slide seats 3 are slidably arranged inside the strip grooves 2 along the length direction. Drilling motors 4 are installed on the outer side of each slide seat 3. Hydraulic chucks 5 are installed at the output end of each drilling motor 4. The top platform 103 is provided with a spacing adjustment mechanism 6 to control the slide seats 3 to move simultaneously. The front end of the base 1 is provided with a support guide 7 for supporting the top pipe and correcting its position.

[0021] General working principle: A total station is used to mark the centerline of the jacking pipe on the bottom plate of the starting well. Using the centerline as a reference, the positions of the freezing pipe holes are marked in a circular array (spacing 0.5-1m, adjusted according to the formation water content). The hole position deviation is ≤20mm. To facilitate the installation of the freezing pipe, when drilling in the jacking pipe channel area, the position of the hydraulic chuck 5 is first adjusted using the spacing adjustment mechanism 6, ensuring that the hydraulic chuck 5 is aligned with the installation position of the freezing pipe. Then, the position of the drill rod is fixed using the hydraulic chuck 5. The rated clamping force of the hydraulic chuck 5 is 50kN, suitable for drill rods of φ50-φ150mm. During clamping, the pressure sensor monitors in real time, automatically supplementing pressure when insufficient (error ±2%). Then, the drilling motor 4 controls the rotation of the drill rod on the hydraulic chuck 5, and the hydraulic cylinder 102 controls the forward movement of the drill rod. The speed of the drilling motor 4 is set to 20... The feed rate is 0-300 rpm, with a propulsion speed of 0.2 m / min. The borehole wall is kept smooth. The hydraulic system is equipped with an overload protection valve (opening pressure 1.2 times the rated pressure). The system automatically stops when the jacking force exceeds the design value during jacking to prevent drill rod breakage or pipe instability. Holes for installing the freezing pipe are opened on the outside of the pipe jacking channel. The drill rod is then removed, and the freezing pipe is installed. The freezing pipe is made of seamless steel (outer diameter φ89 mm, wall thickness 6 mm). After insertion into the borehole, the opening is sealed with expanding cement grout (compressive strength ≥30 MPa). Before injecting refrigerant, a pressure test is performed on the freezing pipe (0.8 MPa constant pressure for 30 min, pressure drop ≤0.05 MPa). During jacking, the hoisting equipment lowers the pipe, and the support guide 7 is used to correct and support the pipe's position. The hydraulic cylinder 102 is then activated to jack the pipe.

[0022] In this embodiment, four sets of strip grooves 2 are provided, and the lines connecting the ends of the strip grooves 2 form a cross shape. The intersection of the lines connecting the ends of the strip grooves 2 is located at the center outside the top platform 103.

[0023] Local working principle: Drill rods can be installed inside the internal resistance groove 2 to improve the drilling rate during use.

[0024] In this embodiment, the spacing adjustment mechanism 6 includes a rotary motor 601, a first bevel gear 602, a second bevel gear 603, a first screw 604, and a first threaded hole 605. The rotary motor 601 is installed in the middle position inside the top platform 103. The output end of the rotary motor 601 is equipped with the first bevel gear 602. The second bevel gear 603 is evenly meshed on the outer side of the first bevel gear 602. The first screw 604 is installed on the side of the second bevel gear 603. The ends of the first screw 604 extend to the inner end of the strip groove 2. The first screw 604 is rotatably installed inside the top platform 103. The first screw 604 passes through the slide block 3 and is threadedly connected to the slide block 3. The slide block 3 is provided with a first threaded hole 605 that mates with the first screw 604.

[0025] Local working principle: When adjusting the position of the drill rod, the rotary motor 601 is started, driving the first bevel gear 602 to rotate. Since the first bevel gear 602 meshes with multiple sets of second bevel gears 603, it can simultaneously drive the first screw 604 on the second bevel gear 603 to rotate. The rotation of the first screw 604 controls the slide block 3 to slide inside the strip groove 2, thereby simultaneously adjusting the position of multiple sets of drill rods. The rotary motor 601 is a servo motor with a speed range of 0-100rpm. It is paired with a trapezoidal first screw 604 with a pitch of 5mm to ensure that the movement accuracy of the slide block 3 is ≤0.1mm. The meshing of the first bevel gear 602 and the second bevel gear 603 ensures that the four sets of slide blocks 3 move synchronously.

[0026] In this embodiment, reinforcing ribs are symmetrically arranged between the top of the base 1 and the inner side of the side plate 101, and the shape of the reinforcing ribs is a right triangle.

[0027] Local working principle: The base 1 and side plate 101 are made of Q345B steel. The reinforcing rib is a 10mm thick right-angled triangular steel plate with two right-angled sides of 200mm and 300mm respectively. The welding spacing is 500mm. The setting of the reinforcing rib can improve the connection stability between the base 1 and the side plate 101 and avoid deformation of the side plate 101 during the jacking process.

[0028] In this embodiment, the support frame 7 includes a guide support rod 701, a telescopic component, a width adjustment component, and a correction component. The guide support rods 701 are symmetrically arranged on both sides of the front end of the base 1. The top of the base 1 is provided with a telescopic component for controlling the guide support rods 701 to slide along the length direction of the base 1. A width adjustment component is provided between the guide support rods 701. A correction component for the top tube is provided between the tops of the guide support rods 701.

[0029] Local working principle: Before hoisting the jacking pipe downwards, the spacing between the two sets of guide support rods 701 is adjusted using the width adjustment component. The guide support rods 701 are extended outwards using the telescopic component until they fit against the side of the starting well to improve the installation stability of the device. After the position of the guide support rods 701 is fixed, the jacking pipe is hoisted downwards using hoisting machinery, and the position of the jacking pipe is corrected using the correction component to ensure that the jacking rod is located between the two sets of guide support rods 701. After the jacking pipe is placed, the hydraulic cylinder 102 is activated to push the jacking pipe forward.

[0030] In this embodiment, limiting grooves 702 are symmetrically opened at both ends of the bottom of the top platform 103, the top of the guide support rod 701 fits with the top of the limiting groove 702, and the inner side of the guide support rod 701 is arc-shaped.

[0031] Local working principle: When the top platform 103 is attached to the end of the jacking pipe and the jacking pipe is pushed forward, the top platform 103 slides on the top of the guide support rod 701, and the guide support rod 701 provides stable support for the top platform 103.

[0032] In this embodiment, the telescopic assembly includes a slide groove 703, a first slide rod 704, a translation motor 705, a second screw 706, a second threaded hole 707, a rear end plate 708, a front end plate 709, a first slot 710, a second slot 711, and a second slide rod 712. The slide groove 703 is formed at the middle position of the base 1 along the length direction. The first slide rod 704 is slidably disposed inside the slide groove 703 along the length direction. The translation motor 705 is installed at the rear end of the base 1. The output end of the translation motor 705 is equipped with the second screw 706, and the second screw 706 extends into the interior of the slide groove 703 and is threadedly connected to the first slide rod 704. The rod 704 has a second threaded hole 707 inside. The end of the first sliding rod 704 away from the base 1 is vertically fixed with a front end plate 709. The top end of the first sliding rod 704 away from the front end plate 709 is vertically fixed with a rear end plate 708. The rear end plate 708 fits against the top of the base 1. One end of each guide support rod 701 has a first slot 710 that mates with the rear end plate 708. The other end of each guide support rod 701 has a second slot 711 that mates with the front end plate 709. The guide support rod 701 is slidably connected to the front end plate 709 and the rear end plate 708. Both ends of the front end plate 709 are fixed with a second sliding rod 712 that is slidably connected to the base 1.

[0033] Local working principle: When the guide support rod 701 is extended and retracted, the translation motor 705 is started to control the second screw 706 to rotate inside the first slide rod 704. Since the first slide rod 704 is limited by the slide groove 703, the first slide rod 704 cannot rotate, but can slide horizontally inside the slide groove 703. When the first slide rod 704 slides, it will drive the front end plate 709 and the rear end plate 708 to move simultaneously, thereby controlling the movement of the guide support rod 701.

[0034] In this embodiment, the width adjustment component includes a linear guide groove 713, an inclined guide groove 714, and a cylindrical guide block 715. The linear guide groove 713 is opened parallel to both sides of the slide groove 703. The end of the linear guide groove 713 away from the side plate 101 is inclined outward with an inclined guide groove 714. The linear guide groove 713 and the inclined guide groove 714 are connected. The cylindrical guide block 715 is slidably provided inside the linear guide groove 713 and the inclined guide groove 714. The top end of the cylindrical guide block 715 is fixedly connected to the guide support rod 701.

[0035] Local working principle: When the guide support rod 701 moves outward, the cylindrical guide block 715 is initially located inside the straight guide groove 713. As the guide support rod 701 moves outward, the cylindrical guide block 715 will enter the interior of the inclined guide groove 714. At this time, the two sets of guide support rods 701 will move in opposite directions. The spacing of the guide support rods 701 is adjusted according to the diameter of the jacking pipe to ensure stable support for the jacking pipe. The inner wall of the inclined guide groove 714 is provided with a polytetrafluoroethylene lubricating layer, and the sliding resistance is ≤50N.

[0036] In this embodiment, the correction assembly includes a vertical rod 716 and an inclined rod 717. The vertical rod 716 is vertically fixed to the outside of the guide support rod 701. The top of each vertical rod 716 is inclined with an inclined rod 717. The inclined rods 717 on the two sets of guide support rods 701 are symmetrical to each other.

[0037] Local working principle: When the jacking pipe is hoisted and lowered, even if the jacking pipe is not parallel to the guide support rod 701 and is in an inclined state, the guide support rod 701 will be corrected under the guidance of the inclined rod 717. The distance between the two sets of vertical rods 716 is the same as the outer diameter of the guide pipe. After the guide support rod 701 enters between the vertical rods 716, it can ensure that it falls between the two sets of guide support rods 701 for stable support.

[0038] like Figures 1-8 As shown in the figure, this embodiment provides a pipe jacking construction method based on artificial freezing technology, and the process is as follows: Step 1: First, determine the location of the pipe jacking channel inside the starting well, and then determine the installation position of the freezing pipe on the outer side of the circumference of the pipe jacking channel; Step 2: Install the construction device inside the starting well, and use the spacing adjustment mechanism 6 to adjust the position of the hydraulic chuck 5 so that the position of the hydraulic chuck 5 is directly opposite the installation position of the freezing pipe. Then use the hydraulic chuck 5 to fix the position of the drill rod. Step 3: The drilling motor 4 controls the rotation of the drill rod on the hydraulic chuck 5, and the hydraulic cylinder 102 controls the forward movement of the drill rod to open a hole for the installation of the freezing pipe on the outside of the jacking pipe channel. Then the drill rod is taken out and the freezing pipe is installed. Step 4: Install the refrigeration unit, brine tank, and circulation pipeline. Inject refrigerant into the freezing pipe to freeze the area of ​​the jacking pipe channel, forming a water barrier to enhance the stability of the stratum. The refrigeration unit adopts a screw chiller (cooling capacity 500kW). The brine (calcium chloride solution, concentration 25%) circulation pipeline adopts φ57mm seamless steel pipe with a 50mm thick rubber and plastic insulation layer on the outside. Step 5: The hoisting equipment hoists the jacking pipe downwards, the support guide 7 is used to correct and support the position of the jacking pipe, and the hydraulic cylinder 102 is started to push the jacking pipe forward; Step 6: Repeat step 5 above until the entire pipe jacking section is completed.

[0039] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. An artificial freezing technology-based pipe jacking construction device, comprising a base (1), a side plate (101) fixed vertically at the rear end of the base (1), hydraulic oil cylinders (102) symmetrically installed at both ends of the inner side of the side plate (101), and a top platform (103) fixed between the output ends of the hydraulic oil cylinders (102); characterized in that: the outer side of the top platform (103) is uniformly provided with a plurality of strip-shaped grooves (2) arranged in a ring shape, the inner part of each strip-shaped groove (2) is slidably provided with a sliding seat (3), the outer side of each sliding seat (3) is installed with a drilling motor (4), the output end of each drilling motor (4) is installed with a hydraulic chuck (5), and the inner part of the top platform (103) is provided with a spacing adjustment mechanism (6) for controlling the simultaneous movement of the sliding seats (3); the front end of the base (1) is provided with a support guide frame (7) for supporting and position correcting the pipe.

2. The pipe jacking device based on artificial freezing technology according to claim 1, characterized in that: The strip-shaped grooves (2) are provided in four groups, and the lines between the end parts of the strip-shaped grooves (2) are in a cross shape, and the intersection of the lines between the end parts of the strip-shaped grooves (2) is located at the center of the outer side of the top platform (103).

3. A pipe jacking device based on artificial freezing technology according to claim 2, characterized in that: The spacing adjustment mechanism (6) comprises a rotary motor (601), a first bevel gear (602), a second bevel gear (603), a first screw rod (604), and a first threaded hole (605), the rotary motor (601) is installed at the middle position of the inner part of the top platform (103), the output end of the rotary motor (601) is installed with the first bevel gear (602), the outer side of the first bevel gear (602) is uniformly meshed with the second bevel gear (603), the side of the second bevel gear (603) is installed with the first screw rod (604), the end part of the first screw rod (604) is extended to the inner end part of the strip-shaped groove (2), and the first screw rod (604) is rotatably installed in the inner part of the top platform (103), the first screw rod (604) penetrates through the sliding seat (3) and is threadedly connected with the sliding seat (3), and the first threaded hole (605) matched with the first screw rod (604) is formed in the sliding seat (3).

4. The pipe jacking device based on artificial freezing technology according to claim 1, characterized in that: The inner side of the side plate (101) and the top part of the base (1) are symmetrically provided with reinforcing ribs, and the shape of the reinforcing ribs is a right triangle.

5. The pipe jacking device based on artificial freezing technology according to claim 1, characterized in that: The support guide frame (7) comprises guide support rods (701), telescopic assemblies, width adjustment assemblies, and correction assemblies, the guide support rods (701) are symmetrically arranged on both sides of the front end of the base (1), the top part of the base (1) is provided with telescopic assemblies for controlling the sliding of the guide support rods (701) along the length direction of the base (1), the width adjustment assemblies are arranged between the guide support rods (701), and the correction assemblies for the pipe are arranged between the top parts of the guide support rods (701).

6. The pipe jacking device based on artificial freezing technology according to claim 5, characterized in that: Limiting grooves (702) are symmetrically formed at both ends of the bottom part of the top platform (103), the top parts of the guide support rods (701) are attached to the top parts of the limiting grooves (702), and the inner side of the guide support rod (701) is arc-shaped.

7. The pipe jacking device based on artificial freezing technology according to claim 5, characterized in that: The telescopic assembly comprises a sliding groove (703), a first sliding rod (704), a translation motor (705), a second screw rod (706), a second threaded hole (707), a rear end plate (708), a front end plate (709), a first clamping groove (710), a second clamping groove (711) and a second sliding rod (712), the sliding groove (703) is arranged at the middle position of the length direction of the base (1), the first sliding rod (704) is slidably arranged in the sliding groove (703) along the length direction, the rear end of the base (1) is provided with the translation motor (705), the output end of the translation motor (705) is provided with the second screw rod (706), the second screw rod (706) extends into the sliding groove (703) and is threadedly connected with the first sliding rod (704), the inside of the first sliding rod (704) is provided with the second threaded hole (707), the end of the first sliding rod (704) away from the base (1) is vertically provided with the front end plate (709), the top of the first sliding rod (704) away from the front end plate (709) is vertically provided with the rear end plate (708), the rear end plate (708) is attached to the top of the base (1), one end of the guide support rod (701) is provided with the first clamping groove (710) matched with the rear end plate (708), the other end of the guide support rod (701) is provided with the second clamping groove (711) matched with the front end plate (709), the guide support rod (701) is slidably connected with the front end plate (709) and the rear end plate (708), and the two ends of the front end plate (709) are fixedly provided with the second sliding rod (712) slidably connected with the base (1).

8. The pipe jacking device based on artificial freezing technology according to claim 7, characterized in that: The width adjusting assembly comprises straight guide grooves (713), inclined guide grooves (714) and cylindrical guide blocks (715), the straight guide grooves (713) are parallelly arranged on the two sides of the sliding groove (703), the end of the straight guide groove (713) away from the side plate (101) is outwardly and obliquely provided with the inclined guide groove (714), the straight guide groove (713) and the inclined guide groove (714) are in communication, and the inside of the straight guide groove (713) and the inclined guide groove (714) is slidably provided with the cylindrical guide block (715), and the top end of the cylindrical guide block (715) is fixedly connected with the guide support rod (701).

9. A pipe jacking apparatus based on artificial freezing technology according to any one of claims 5, characterized in that: The correction assembly comprises vertical rods (716) and inclined rods (717), the vertical rods (716) are vertically fixed outside the guide support rod (701), the top end of the vertical rod (716) is outwardly and obliquely provided with the inclined rod (717), and the inclined rods (717) on the two groups of guide support rods (701) are mutually symmetrical.

10. A pipe jacking construction method based on artificial freezing technology, based on the pipe jacking construction device based on artificial freezing technology according to any one of claims 1-9, characterized in that, The method comprises the following steps: Step 1: determining the position of the pipe jacking channel in the inside of the starting well, and determining the installation position of the frozen pipe outside the circumference of the pipe jacking channel; Step 2: installing the construction device in the inside of the starting well, adjusting the position of the hydraulic chuck (5) by using the spacing adjusting mechanism (6), so that the position of the hydraulic chuck (5) is opposite to the installation position of the frozen pipe, and then fixing the position of the drill rod by using the hydraulic chuck (5); Step 3: The drilling motor (4) controls the rotation of the drill rod on the hydraulic chuck (5), and controls the forward movement of the drill rod by using the hydraulic cylinder (102), to open a hole for the installation of the freezing pipe outside the pipe jacking passage, and then the drill rod is taken out, and the freezing pipe is installed; Step 4: Install the refrigeration unit, salt water tank and circulating pipeline, inject refrigerant into the freezing pipe, freeze the pipe jacking passage area, and form a water-resisting barrier to enhance the stability of the stratum; Step 5: Hoist the pipe jacking downward by using the hoisting equipment, correct the position of the pipe jacking by using the support guide frame (7) and support the pipe jacking, and start the hydraulic cylinder (102) to jacking the pipe jacking; Step 6: Repeat the above step 5 until the pipe jacking of the whole section is completed.

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