Non-excavation directional drilling pipeline crossing construction method

Abstract

The invention discloses a trenchless directional drilling pipeline crossing construction method. The method comprises the following steps: S1, surveying and setting out; s2, foundation pit excavation is conducted on the section of the construction area; s3, drilling is conducted; s4, broaching is conducted; s5, pipeline welding; s6, tube drawing; s7, a pipe opening of the original pipe is blocked; s8, a concrete base is obtained through pouring; s9, a climbing frame is installed on the top of the concrete base; s10, a first connecting pipe is installed at a pipe opening of the pipeline through a hoop structure; s11, the first connecting pipe is sleeved with a sleeve; s12, a second connecting pipe is installed at a pipe opening of the original pipe; s13, the climbing frame is dismounted; and S14, the cavity is backfilled with soil. According to the invention, the pipeline penetrating through the whole pipeline penetrating hole can be effectively connected with the original pipe, the technical problem that the pipeline and the original pipe cannot be connected due to the length error of the connecting pipe is avoided, and the interference and influence of the traditional excavation construction on the traffic environment and surrounding buildings can be effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline excavation construction, and in particular relates to a trenchless directional drilling pipeline crossing construction method. Background Art

[0002] Traditional pipeline excavation construction technology usually requires excavation and backfilling on the road. The excavation process will cause road closures or traffic congestion, which will have a great impact on traffic, and traditional excavation will cause great damage to the road. Traditional pipeline excavation construction technology is only applicable to some engineering projects. For some pipelines crossing rivers, excavation and backfilling operations cannot be performed.

[0003] In order to solve this technical problem, the existing technology uses trenchless horizontal directional drilling to cross the pipeline. For example, a Chinese patent discloses an invention patent named a construction method of trenchless horizontal directional drilling under an existing railway (authorization announcement number: CN112727365B), which effectively solves the interference and impact of traditional excavation construction on the traffic environment and surrounding buildings.

[0004] When the drilling rig passes the pipeline through the entire pipeline crossing hole, there is a distance between the pipeline and the original pipe set on the site. At this time, the technicians in this field need to weld a connecting pipe between the pipeline and the original pipe. In the process of welding the connecting pipe, it is necessary to measure the distance between the pipeline and the original pipe, and then cut the connecting pipe of a fixed length. However, there is a certain error when cutting the connecting pipe. If the length of the connecting pipe is long, the connecting pipe cannot be moved between the pipeline and the original pipe; if the length of the connecting pipe is short, after the connecting pipe and the pipeline are welded, there is a gap between the connecting pipe and the original pipe, which cannot meet the welding requirements of the connecting pipe and the original pipe. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art and to provide a trenchless directional drilling pipeline crossing construction method, which can effectively connect the pipeline passing through the entire pipeline crossing hole and the original pipe, avoid the technical problem that the pipeline and the original pipe cannot be connected due to errors in the length of the connecting pipe, and can effectively solve the interference and impact of traditional excavation construction on the traffic environment and surrounding buildings.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The trenchless directional drilling pipeline crossing construction method is characterized by comprising the following steps:

[0008] S1. Measurement and layout.

[0009] S2. Excavate the foundation pit in the construction area to form foundation pit one and foundation pit two. Foundation pit two is set between the two sections, and the original pipe is set in the section on the right.

[0010] S3. Drilling: Set up a drilling rig in foundation pit 2, and use the drilling rig to drill horizontally into the soil on the left side to perform drilling operations.

[0011] S4. Hole expansion: After the drilling is completed, the drill bit of the drilling rig is removed and the expansion head is installed back to perform hole expansion operations to obtain a pipeline crossing hole.

[0012] S5. Weld the pipeline and set it in foundation pit one.

[0013] S6. Pull the pipe: Connect the pipe to the expansion head, use the drilling rig to pass the pipe through the entire pipe crossing hole, then remove the pipe from the expansion head, and then move the drilling rig out of foundation pit 2.

[0014] S7. Use the end cap to seal the opening of the original pipe.

[0015] S8. Casting to obtain a concrete base: the pipe opening of the pipe extending into the second foundation pit is sealed with an end cap, a formwork is set up in the second foundation pit, and concrete is poured in the formwork to obtain a concrete base. The concrete base is provided with a cavity, and the pipe openings of the pipe and the original pipe are arranged in the cavity, and then the formwork is removed.

[0016] S9. Install a climbing frame on the top of the concrete base, and the climbing frame is set in the cavity.

[0017] S10, removing the end cover at the pipe mouth of the pipeline, and then installing the connecting pipe 1 at the pipe mouth of the pipeline through the clamp structure.

[0018] S11, putting the second connecting pipe into the casing, then hanging the casing into the cavity, then putting the casing onto the first connecting pipe, and the first connecting pipe pushes the second connecting pipe out of the casing.

[0019] S12. Remove the end cover at the pipe mouth of the original pipe, install the connecting pipe 2 to the pipe mouth of the original pipe through the clamp structure, move the sleeve to the middle position between the pipe mouth of the pipeline and the pipe mouth of the original pipe, weld the contact point between the sleeve and the pipeline, and weld the contact point between the sleeve and the original pipe at the same time.

[0020] S13. Remove the climbing frame.

[0021] S14, backfilling soil in the cavity to form a backfill layer 1, and then backfilling soil in the foundation pit 2, with the soil being arranged in the area between the concrete base and the site to form a backfill layer 2.

[0022] Furthermore, before installing the climbing frame, a support frame is set at the bottom of the cavity, and then a jacking device is installed on the support frame, and then the height of the jacking device is adjusted, and then a steel plate is set on the jacking device. The steel plate is used to support the clamp structure and the casing. After the casing is welded between the pipeline and the original pipe, the support plate is fixed between the support frame and the steel plate, and then the jacking device is removed.

[0023] Furthermore, the support frame is obtained by welding H-shaped steel between two steel pipes.

[0024] Furthermore, the jacking device includes a jacking seat and a jacking rod. When installing the jacking device, a fixing bolt is inserted between the jacking seat and the flange plate of the H-shaped steel, and a fixing nut is screwed into the fixing bolt. Then a limit piece is screwed into the jacking rod. The limit piece and the jacking rod are threadedly connected. Then the position of the limit piece on the jacking rod is adjusted, and then the jacking rod is extended into the limiting hole of the jacking seat. At this time, the limit piece is supported on the jacking seat, and then the steel plate is supported on the end of the jacking rod.

[0025] Furthermore, during the installation of the climbing frame, a mounting frame is first installed on the top of the concrete base, and two mounting frames are used to install a single climbing frame. After the casing is installed, the climbing frame is removed from the mounting frame, and the climbing frame is lifted out of the cavity, and then the mounting frame is removed.

[0026] Furthermore, the mounting frame includes a mounting seat, an adjustment rod and a mounting rod, the adjustment rod is horizontally welded on the mounting seat, the adjustment rod is provided with an adjustment hole and an opening, the opening and the adjustment hole are connected, the mounting rod is provided with a connecting column, and a mounting head is fixed at the outer end of the mounting rod.

[0027] The installation steps of the mounting frame and climbing frame are as follows:

[0028] (1) A second fixing bolt is set on the concrete base, and then the mounting base is installed on the second fixing bolt. The second fixing bolt passes through the first mounting hole of the mounting base, and then the second fixing nut is screwed into the second fixing bolt.

[0029] (2) Insert the mounting rod into the adjustment hole. The connecting column is embedded in the opening. Adjust the length of the mounting rod extending out of the adjustment hole. Then screw the locking nut onto the connecting column.

[0030] (3) Lift the climbing frame into the cavity.

[0031] (4) Insert fixing bolt 3 between mounting hole 2 of the mounting head and mounting hole 3 of the ear plate on the climbing frame, and then screw fixing nut 3 onto fixing bolt 3.

[0032] Furthermore, a top plate is fixed to the mounting seat, a first reinforcing member is fixed between the top plate and the adjusting rod, and a second reinforcing member is fixed between the adjusting rod and the mounting seat.

[0033] Furthermore, after the mounting frames are removed, the mounting frames are placed uniformly, and then a connecting piece is installed between the two mounting frames, and the limiting column of the connecting piece is inserted into the mounting hole 1 of the mounting seat.

[0034] Furthermore, the hoop structure includes two hoop units, and the hoop unit includes two hoop plates symmetrically arranged up and down, and the hoop plates are provided with connecting plates 1 and 2, and the hoop plates are provided with grooves.

[0035] When the two hoop plates are connected, the fixing bolts four are passed through the connecting plate one, and then the fixing nuts four are screwed into the fixing bolts four, so that the two hoop plates form hoop holes.

[0036] When the two clamp units are connected, the fixing bolt five is passed through the connecting plate two, and then the fixing nut five is screwed into the fixing bolt five.

[0037] When installing the connecting pipe 1, the connecting pipe 1 is inserted into the hoop hole, the connecting pipe 1 and the pipeline are spliced, and then the splicing of the connecting pipe 1 and the pipeline is welded through the groove, and then the contact between the hoop plate and the connecting pipe 1 is welded.

[0038] When installing the second connecting pipe, the second connecting pipe is inserted into the hoop hole, the second connecting pipe and the original pipe are spliced ​​together, and then the splicing of the second connecting pipe and the original pipe is welded through the groove, and then the contact between the hoop plate and the second connecting pipe is welded.

[0039] Furthermore, when the connecting pipe 2 is installed to the pipe mouth of the original pipe through the clamp structure, the tightening screw is screwed into the tube plate of the casing. When the casing moves to the middle position between the pipe mouth of the pipeline and the pipe mouth of the original pipe, the tightening screw is screwed and tightened on the connecting plate 1.

[0040] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0041] (1) The present invention supports the pipeline and the original pipe through a concrete base, thereby improving the force-bearing capacity of the pipeline and the original pipe and meeting the requirements of subsequent connection operations of the pipeline and the original pipe. In addition, the connecting components between the pipeline and the original pipe are all arranged in the cavity of the concrete base, which protects the connecting components.

[0042] (2) The present invention divides the entire connecting pipe into connecting pipe 1 and connecting pipe 2. Connecting pipe 1 is installed at the pipe mouth of the pipeline, and connecting pipe 2 is installed at the pipe mouth of the original pipe. The sleeve is sleeved on connecting pipe 1 and connecting pipe 2. When the contact between the sleeve and the pipeline and the contact between the sleeve and the original pipe are welded, the pipeline passing through the entire pipeline through hole and the original pipe can be effectively connected, avoiding the technical problem that the pipeline and the original pipe cannot be connected due to an error in the length of the connecting pipe.

[0043] (3) The pipe mouth of the pipeline of the present invention and the connecting pipe 1 are fixedly connected by a clamp structure, and the connecting pipe 2 and the original pipe are fixedly connected by a clamp structure. The connecting pipe 1, the sleeve and the connecting pipe 2 act on the pipeline and the original pipe, which facilitates the rapid welding of the contact between the sleeve and the pipeline, and the rapid welding of the contact between the sleeve and the original pipe.

[0044] (4) The present invention can effectively solve the interference and impact of traditional excavation construction on the traffic environment and surrounding buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be further described below in conjunction with the accompanying drawings:

[0046] Figure 1 It is a schematic diagram of the structure of the present invention when the foundation pit is excavated;

[0047] Figure 2 It is a schematic diagram of the structure of the present invention when the tube is being drawn;

[0048] Figure 3 It is a schematic diagram of the structure of the present invention when pouring a concrete base;

[0049] Figure 4 It is a structural schematic diagram of the present invention when the jacking device is installed on the support frame;

[0050] Figure 5 It is a structural schematic diagram of the connection between the support frame and the jacking device in the present invention;

[0051] Figure 6 An exploded view of the jacking device in the present invention;

[0052] Figure 7 It is a structural schematic diagram of the present invention when a steel plate is arranged on a jacking device;

[0053] Figure 8 This is a schematic diagram of the structure of the present invention when the climbing frame is installed;

[0054] Fig. 9 It is a structural schematic diagram of the mounting frame in the present invention;

[0055] Fig.10 It is a schematic diagram of the structure of the climbing frame in the present invention;

[0056] Fig.11 An exploded view of the mounting frame of the present invention;

[0057] Fig.12 This is a structural schematic diagram of the present invention when the clamp structure is installed at the pipe mouth of the pipeline;

[0058] Fig.13 It is a structural schematic diagram of the clamp structure in the present invention;

[0059] Fig.14 It is a structural schematic diagram of the present invention when a connecting pipe is installed at the pipe mouth of a pipeline through a clamp structure;

[0060] Fig.15 It is a schematic diagram of the structure of the present invention when the casing is suspended;

[0061] Fig.16 It is a structural schematic diagram of the present invention when the sleeve is put on the connecting pipe;

[0062] Fig.17 It is a structural schematic diagram of the present invention when the sleeve is moved to the middle position between the pipe opening of the pipeline and the pipe opening of the original pipe;

[0063] Fig.18 This is a schematic diagram of the structure of the present invention when the climbing frame is removed;

[0064] Fig.19 It is a structural schematic diagram of the present invention when the connecting member is installed between two mounting frames;

[0065] Fig. 20 It is a structural schematic diagram of the connecting member in the present invention;

[0066] Fig.21 It is a structural schematic diagram of the present invention when the support plate is fixed between the support frame and the steel plate;

[0067] Fig. 22 for Fig.21 Schematic diagram of the structure inside the concrete base;

[0068] Fig.23 It is a schematic diagram of the structure of the present invention when backfilling soil in a cavity;

[0069] Fig.24 It is a schematic structural diagram of the present invention when backfilling soil in the area between foundation pit 2 and the concrete foundation.

[0070] In the figure, 1-site; 2-foundation pit 1; 3-foundation pit 2; 4-drilling rig; 5-pipeline; 6-limiting hole; 7-original pipe; 8-concrete base; 9-cavity; 10-support frame; 11-lifting device; 12-steel pipe; 13-H-shaped steel; 14-lifting seat; 15-lifting rod; 16-limiting piece; 17-end; 18-steel plate; 19-mounting frame; 20-climbing frame; 21-mounting seat; 22-adjusting rod; 23-mounting rod; 24-mounting head; 25-adjusting Hole; 26-opening; 27-connecting column; 28-locking nut; 29-reinforcement member 1; 30-top plate; 31-reinforcement member 2; 32-hoop structure; 33-hoop plate; 34-connecting plate 2; 35-connecting plate 1; 36-groove; 37-hoop hole; 38-connecting pipe 1; 39-sleeve; 40-connecting pipe 2; 41-tightening screw; 42-connecting piece; 43-limiting column; 44-support plate; 45-backfill layer 1; 46-backfill layer 2; 47-ear plate. DETAILED DESCRIPTION

[0071] like Figures 1 to 24As shown in the figure, the trenchless directional drilling pipeline crossing construction method of the present invention is generally used for crossing below 3m above the ground. The area occupied by the method is smaller than that of the traditional excavation method, and the impact on ground traffic and people's daily life is relatively small. Moreover, the surface will not be damaged at will, which makes the service life of the surface longer, and the green space will not be damaged and the surrounding environment will not be polluted.

[0072] The original pipe 7 of the present invention is a pipe reserved for gas transportation, which is used to transport gas to the urban pipeline network, effectively promoting the development of urban pipeline network gas and bringing greater benefits to the enterprise itself and users. Specifically, it includes the following steps:

[0073] S1. Measure and lay out the positions of the original pipe 7 in the construction area, and draw the excavation positions of foundation pit 1 2 and foundation pit 2 3.

[0074] S2. Excavate a foundation pit in the section 1 of the construction area to form foundation pit 1 2 and foundation pit 2 3. The foundation pit 2 3 is arranged between the two sections of the sections 1, and the original pipe 7 is arranged in the section 1 on the right side.

[0075] S3. Drilling: A drilling rig is set up in foundation pit 2 3, and the drilling rig is used to drill horizontally into the soil of section 1 on the left side to perform drilling operations.

[0076] S4. Hole expansion: After the drilling is completed, the drill bit of the drilling rig is removed and the expansion head is installed back to perform hole expansion operations to obtain a pipeline crossing hole.

[0077] S5. Pipeline 5 is welded and set in foundation pit 2.

[0078] S6. Pull the pipe: connect the pipe 5 to the back-expansion head, pass the pipe 5 through the entire pipe crossing hole through the drilling rig 4, then remove the pipe 5 from the back-expansion head, and then move the drilling rig 4 out of the foundation pit 3.

[0079] S7. The pipe opening of the original pipe 7 is sealed with an end cap.

[0080] S8. Casting to obtain a concrete base 8: The pipe opening of the pipe 5 extending into the second foundation pit 3 is sealed with an end cover, a template is set up in the second foundation pit 3, and then concrete is cast in the template to obtain a concrete base 8, the concrete base 8 is provided with a cavity 9, the pipe openings of the pipe 5 and the pipe openings of the original pipe 7 are arranged in the cavity 9, and then the template is removed.

[0081] A support frame 10 is arranged at the bottom of the cavity 9. The support frame 10 is obtained by welding three H-shaped steels 13 between two steel pipes 12. The support frame 10 has a certain strength, is not easily deformed, and has sufficient force bearing capacity.

[0082] A jacking device 11 is installed on the support frame 10. The jacking device 11 includes a jacking seat 14 and a jacking rod 15. When installing the jacking device 11, a fixing bolt 1 is passed between the jacking seat 14 and the flange plate of the H-shaped steel 13, and then a fixing nut 1 is screwed into the fixing bolt 1. Then, a limiter 16 is screwed into the jacking rod 15. The limiter 16 includes a chassis and an adjusting nut. The adjusting nut is welded on the chassis. The limiter 16 is threadedly connected to the jacking rod 15 through the adjusting nut. Then, the adjusting nut is screwed to adjust the position of the limiter 16 on the jacking rod 15 to adjust the height of the jacking device 11. Then, the jacking rod 15 is extended into the limiting hole 6 of the jacking seat 14. At this time, the limiter 16 is supported on the jacking seat 14, and then the steel plate 18 is supported on the end 17 of the jacking rod 15. In the present invention, two jacking devices 11 are installed on each H-shaped steel 13.

[0083] S9, a climbing frame 20 is installed on the top of the concrete base 8, and the climbing frame 20 is welded from a plurality of steel pipes. In the process of installing the climbing frame 20, a mounting frame 19 is first installed on the top of the concrete base 8, and two mounting frames 19 are used to install a single climbing frame 20.

[0084] The mounting frame 19 of the present invention specifically includes a mounting seat 21, an adjustment rod 22 and a mounting rod 23. The adjustment rod 22 is horizontally welded on the mounting seat 21. The adjustment rod 22 is provided with an adjustment hole 25 and an opening 26. The opening 26 is connected to the adjustment hole 25. The mounting rod 23 is provided with a connecting column 27. The outer end of the mounting rod 23 is fixed with a mounting head 24. The mounting seat 21 is fixed with a top plate 30. A T-shaped reinforcement member 29 is fixed between the top plate 30 and the adjustment rod 22. A reinforcement member 2 31 is fixed between the adjustment rod 22 and the mounting seat 21 to improve the force bearing capacity of the adjustment rod 22, so that the mounting rod 23 meets the installation requirements of the entire climbing frame 20.

[0085] The installation steps of the mounting frame 19 and the climbing frame 20 are as follows:

[0086] (1) A second fixing bolt is set on the concrete base 8, and then the mounting base 21 is mounted on the second fixing bolt. The second fixing bolt passes through the first mounting hole of the mounting base 21, and then the second fixing nut is screwed into the second fixing bolt.

[0087] (2) Insert the mounting rod 23 into the adjustment hole 25. At this time, the connecting column 27 is embedded in the opening 26. Then adjust the length of the mounting rod 23 extending out of the adjustment hole 25. Then, screw the locking nut 28 into the connecting column 27. This can control the subsequent position of the climbing frame 20 in the cavity 9 and ensure that the climbing frame 20 can be fully extended into the cavity 9 to avoid the climbing frame 20 and the concrete base 8 from touching each other and causing damage to the structure of the concrete base 8. In addition, it can control the distance between the climbing frame and the pipeline 5. The operator can use the climbing frame 20 to weld the subsequent casing 39 and the connecting pipe 1 38, and weld the casing 39 and the connecting pipe 2 40 at the same time.

[0088] (3) Hang the climbing frame 20 into the cavity 9.

[0089] (4) Insert fixing bolt No. 3 between mounting hole No. 2 of mounting head 24 and mounting hole No. 3 of ear plate 47 on climbing frame 20, and then screw fixing nut No. 3 onto fixing bolt No. 3.

[0090] S10, the connection pipe 1 38 and the connection pipe 2 40 are installed by using the hoop structure 32, the hoop structure 32 includes two hoop units, and a single hoop unit includes two hoop plates 33 symmetrically arranged up and down, the hoop plate 33 is provided with a connection plate 1 35 and a connection plate 2 34, and the hoop plate 33 is provided with a groove 36. When the two hoop plates 33 are connected, a fixing bolt 4 is passed through the connection plate 1 35, and then a fixing nut 4 is screwed into the fixing bolt 4, and the two hoop plates 33 form a hoop hole 37. When the two hoop units are connected, a fixing bolt 5 is passed through the connection plate 2 34, and then a fixing nut 5 is screwed into the fixing bolt 5.

[0091] Remove the end cap at the pipe mouth of the pipe 5, and then install the connecting pipe 38 at the pipe mouth of the pipe 5 through the clamp structure 32. When installing the connecting pipe 38, the connecting pipe 38 is inserted into the clamp hole 37, and the connecting pipe 38 and the pipe 5 are spliced. Then, the splicing of the connecting pipe 38 and the pipe 5 is welded through the groove 36, and then the contact between the clamp plate 33 and the connecting pipe 38 is welded. At this time, the clamp plate 33 is supported on the steel plate 18 (such as Fig.14 shown).

[0092] S11, put the second connecting pipe 40 into the sleeve 39, then hang the sleeve 39 into the cavity 9, then put the sleeve 39 onto the first connecting pipe 38, the first connecting pipe 38 pushes the second connecting pipe 40 out of the sleeve 39, and the sleeve 39 is supported on the steel plate 18 (such as Fig.16 shown).

[0093] S12, remove the end cap at the pipe mouth of the original pipe 7, and then install the second connecting pipe 40 to the pipe mouth of the original pipe 7 through the hoop structure 32. When installing the second connecting pipe 40, the second connecting pipe 40 extends into the hoop hole 37, splices the second connecting pipe 40 and the original pipe 7, and then welds the splicing of the second connecting pipe 40 and the original pipe 7 through the groove 36, and then welds the contact between the hoop plate 33 and the second connecting pipe 40, and at this time, the hoop plate 33 is supported on the steel plate 18.

[0094] At this time, the hoop structure 32 and the sleeve 39 are supported on the support frame 10 through the steel plate 18 and the jacking device 11, so that the sleeve 39 can be used as an operating platform for operators to walk and stand, which is convenient for subsequent welding work.

[0095] Then, screw the jacking screw 41 into the tube plate of the sleeve 39, then move the sleeve 39 to the middle position between the pipe mouth of the pipeline 5 and the pipe mouth of the original pipe 7, screw the jacking screw 41, and jack the jacking screw 41 against the connecting plate 1 35. Then weld the contact point of the sleeve 39 and the connecting pipe 1 38, and weld the contact point of the sleeve 39 and the connecting pipe 2 40, and weld the sleeve 39 between the pipeline 5 and the original pipe 7. During the welding process, the jacking screw 41 plays a positioning role for the sleeve 39, avoids the movement of the sleeve 39 during the welding process, improves the firmness and accuracy of the sleeve 39 welding, and at the same time makes the pipeline 5, the connecting pipe 1 38, the sleeve 39, the connecting pipe 2 40 and the original pipe 7 have good sealing. Then fix the support plate 44 between the support frame 10 and the steel plate 18, so that the pipeline 5 and the original pipe 7 have good stability, and then remove the lifting device 11.

[0096] S13, when the sleeve 39 is installed, the climbing frame 20 is removed from the mounting frame 19, and the climbing frame 20 is lifted out of the cavity 9, and then the mounting frame 19 is removed. After the mounting frames 19 are removed, the mounting frames 19 are uniformly placed, and then the connecting member 42 is installed between the two mounting frames 19, and the limiting column 43 of the connecting member 42 is inserted into the mounting hole 1 of the mounting seat 21, so that the uniformly placed mounting frames 19 can be connected into an integral structure to prevent the mounting frames 19 from tipping over or being lost.

[0097] S14, backfill the cavity 9 with soil to form a backfill layer 1 45. Then backfill the foundation pit 2 3 with soil, the soil is arranged in the area between the concrete base 8 and the section 1, forming a backfill layer 2 46.

[0098] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. Trenchless directional drilling pipeline crossing construction method, It is characterized in that The steps include: S1. Measurement and laying out; S2. Excavate the foundation pit in the construction area to form foundation pit one and foundation pit two. Foundation pit two is set between the two sections, and the original pipe is set in the section on the right; S3, drilling: a drilling rig is set up in the second foundation pit, and the drilling rig is used to drill horizontally into the soil in the section on the left side to perform drilling operations; S4, hole enlargement: after the drilling is completed, the drill bit of the drilling rig is removed, and the enlargement head is installed back to perform the hole enlargement operation to obtain the pipeline crossing hole; S5. Pipeline welding and installation in foundation pit 1; S6, pipe pulling: connect the pipe to the expansion head, use the drilling rig to pass the pipe through the entire pipe crossing hole, then remove the pipe from the expansion head, and then move the drilling rig out of the foundation pit 2; S7. Use an end cap to seal the opening of the original pipe; S8, pouring to obtain a concrete base: the pipe opening of the pipe extending into the second foundation pit is sealed with an end cap, a template is set up in the second foundation pit, and concrete is poured in the template to obtain a concrete base, the concrete base is provided with a cavity, the pipe opening of the pipe and the pipe opening of the original pipe are arranged in the cavity, and then the template is removed; S9. Install a climbing frame on the top of the concrete base, and the climbing frame is set in the cavity; S10, removing the end cover at the pipe mouth of the pipeline, and then installing the connecting pipe 1 at the pipe mouth of the pipeline through the clamp structure; S11, putting the second connecting pipe into the casing, then hanging the casing into the cavity, and then putting the casing onto the first connecting pipe, so that the first connecting pipe pushes the second connecting pipe out of the casing; S12, remove the end cap at the pipe mouth of the original pipe, install the second connecting pipe to the pipe mouth of the original pipe through the clamp structure, move the sleeve to the middle position between the pipe mouth of the pipeline and the pipe mouth of the original pipe, weld the contact part of the sleeve and the pipeline, and weld the contact part of the sleeve and the original pipe at the same time; S13, dismantle the climbing frame; S14, backfilling soil in the cavity to form a backfill layer 1, and then backfilling soil in the foundation pit 2, with the soil being arranged in the area between the concrete base and the site to form a backfill layer 2.

2. The trenchless directional drilling pipeline crossing construction method according to claim 1, Features: Before installing the climbing frame, set up a support frame at the bottom of the cavity, then install a jacking device on the support frame, adjust the height of the jacking device, and then set a steel plate on the jacking device. The steel plate is used to support the clamp structure and the casing. After the casing is welded between the pipeline and the original pipe, fix the support plate between the support frame and the steel plate, and then remove the jacking device.

3. The trenchless directional drilling pipeline crossing construction method according to claim 2, Features: The support frame is obtained by welding H-shaped steel between two steel pipes.

4. The trenchless directional drilling pipeline crossing construction method according to claim 3, Features: The jacking device includes a jacking seat and a jacking rod. When installing the jacking device, a fixing bolt is inserted between the jacking seat and the flange plate of the H-shaped steel, and then a fixing nut is screwed into the fixing bolt. Then, a limit piece is screwed into the jacking rod. The limit piece and the jacking rod are threadedly connected, and then the position of the limit piece on the jacking rod is adjusted. Then, the jacking rod is extended into the limiting hole of the jacking seat. At this time, the limit piece is supported on the jacking seat, and then the steel plate is supported on the end of the jacking rod.

5. The trenchless directional drilling pipeline crossing construction method according to claim 1, Features: During the installation of the climbing frame, first install the mounting frame on the top of the concrete base, and use two mounting frames to install a single climbing frame. When the casing is installed, remove the climbing frame from the mounting frame, lift the climbing frame out of the cavity, and then remove the mounting frame.

6. The trenchless directional drilling pipeline crossing construction method according to claim 5, Features: The mounting frame comprises a mounting seat, an adjustment rod and a mounting rod, the adjustment rod is horizontally welded on the mounting seat, the adjustment rod is provided with an adjustment hole and an opening, the opening is connected with the adjustment hole, the mounting rod is provided with a connecting column, and a mounting head is fixed on the outer end of the mounting rod; The installation steps of the mounting frame and climbing frame are as follows: (1) A second fixing bolt is arranged on the concrete base, and then the mounting base is mounted on the second fixing bolt. The second fixing bolt passes through the first mounting hole of the mounting base, and then a second fixing nut is screwed into the second fixing bolt; (2) Insert the mounting rod into the adjustment hole. The connecting column is then inserted into the opening. Adjust the length of the mounting rod extending out of the adjustment hole. Then screw the locking nut onto the connecting column. (3) Lift the climbing frame into the cavity; (4) Insert fixing bolt 3 between mounting hole 2 of the mounting head and mounting hole 3 of the ear plate on the climbing frame, and then screw fixing nut 3 onto fixing bolt 3.

7. The trenchless directional drilling pipeline crossing construction method according to claim 6, Features: A top plate is fixed to the mounting seat, a first reinforcing member is fixed between the top plate and the adjusting rod, and a second reinforcing member is fixed between the adjusting rod and the mounting seat.

8. The trenchless directional drilling pipeline crossing construction method according to claim 6, Features: After the mounting frames are removed, the mounting frames are placed uniformly, and then a connecting piece is installed between the two mounting frames, and the limiting column of the connecting piece is inserted into the mounting hole 1 of the mounting seat.

9. The trenchless directional drilling pipeline crossing construction method according to claim 1, Features: The hoop structure comprises two hoop units, and the hoop unit comprises two hoop plates symmetrically arranged up and down, the hoop plates are provided with a connecting plate 1 and a connecting plate 2, and the hoop plates are provided with a groove; When the two hoop plates are connected, a fixing bolt 4 is passed through the connecting plate 1, and then a fixing nut 4 is screwed into the fixing bolt 4, so that the two hoop plates form a hoop hole; When the two clamp units are connected, the fixing bolt 5 is inserted into the connecting plate 2, and then the fixing nut 5 is screwed into the fixing bolt 5; When installing the connecting pipe 1, the connecting pipe 1 is inserted into the hoop hole, the connecting pipe 1 and the pipeline are spliced, and then the splicing of the connecting pipe 1 and the pipeline is welded through the groove, and then the contact between the hoop plate and the connecting pipe 1 is welded; When installing the second connecting pipe, the second connecting pipe is inserted into the hoop hole, the second connecting pipe and the original pipe are spliced ​​together, and then the splicing of the second connecting pipe and the original pipe is welded through the groove, and then the contact between the hoop plate and the second connecting pipe is welded.

10. The trenchless directional drilling pipeline crossing construction method according to claim 9, Features: When the connecting pipe 2 is installed to the pipe mouth of the original pipe through the clamp structure, the tightening screw is screwed into the tube plate of the casing. When the casing is moved to the middle position between the pipe mouth of the pipeline and the pipe mouth of the original pipe, the tightening screw is screwed and tightened on the connecting plate 1.

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