Construction method of cross intersection pipe jacking channel

Abstract

The present application relates to the technical field of pipe jacking channel, and discloses a construction method of cross pipe jacking channel, which comprises two pipe jacking channels and the following steps: step one, two pipe jacking starting points and two receiving wells located in four quadrants of the cross road intersection are implemented in advance by using open excavation method, and the pipe jacking starting well one, the pipe jacking starting well two, the pipe jacking receiving well one and the pipe jacking receiving well two are located in the opposite quadrants outside the red line of the planned road of the cross road intersection; step two, a common pipe section with a larger cross section in the cross pipe jacking channel is jacked in advance. By jacking the large cross section pipe jacking channel in advance and implementing the small cross section pipe jacking channel later, the small cross section pipe jacking channel is jacked through the specially-made pipe section of the large cross section pipe jacking channel, the cross pipe jacking channel is connected, the investment in mechanical equipment and the engineering cost are reduced, the problems of ground traffic relief and pipeline relocation in the early stage are solved, the early stage engineering cost is saved, and the construction time and construction cost are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe jacking channel, in particular to a construction method of cross pipe jacking channel. BACKGROUND

[0002] Pipe jacking construction is a trenchless construction method, which is a pipe laying construction technology without or with less excavation. The pipe jacking construction is to overcome the pipe and the surrounding soil by means of the jacking force generated by the jacking equipment in the working pit, and to top into the soil according to the designed slope, and to transport the earthwork. After a section of pipe is completed and topped into the soil layer, the second section of pipe is lowered to continue jacking. The principle is to use the thrust force of the main jacking cylinder and the pipe to push the tool pipe or the tunneling machine from the working pit through the soil layer to the receiving pit and hoist it. The pipe is buried between the two pits after the tool pipe or the tunneling machine.

[0003] As a trenchless construction technology, the pipe jacking construction method has the comprehensive functions of economy, high efficiency and environmental protection, and is more and more used in the entrances and auxiliary projects of municipal and subway engineering, which meets the new economic development concept of innovation, coordination, green, openness and sharing in China.

[0004] At present, underground street crossing channels are implemented at urban crossroads. The conditions with ground traffic relief and pipeline relocation are usually implemented by open excavation method. The conditions without open excavation are combined with geological conditions to use the construction method of underground excavation or pipe jacking. The pipe jacking method often uses four pipe jacking channels set at the road side open excavation shafts for connection. The engineering quantity is large, the engineering cost is high, the level of service needs to be improved, and the pipe jacking channel is limited in the application of interactive underground street crossing channel technology, which needs to be improved. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a construction method of cross pipe jacking channel, which solves the problems that the underground street crossing channel is implemented at the urban crossroads, the conditions with ground traffic relief and pipeline relocation are usually implemented by open excavation method, the conditions without open excavation are combined with geological conditions to use the construction method of underground excavation or pipe jacking, the pipe jacking method often uses four pipe jacking channels set at the road side open excavation shafts for connection, the engineering quantity is large, the engineering cost is high, the level of service needs to be improved, and the pipe jacking channel is limited in the application of interactive underground street crossing channel technology.

[0006] The present application solves the above problems.

[0007] To achieve the above purpose, the present application is implemented by the following technical scheme: a construction method of cross pipe jacking channel, comprising the following steps:

[0008] Step one, two pipe launching and two pipe receiving wells located in the four quadrants of the intersection of the cross road are implemented in advance by open cut method, and the two pipe launching wells and the two pipe receiving wells are located in the opposite quadrants outside the red line of the planned road of the cross road intersection.

[0009] Step two, the ordinary pipe section one with larger cross section in the cross intersection pipe channel is pushed in advance, and the pipe mechanical equipment is launched from the pipe launching well, and a special pipe section is arranged at the connection position of the cross intersection pipe channel during the pushing process of the pipe channel, and the special pipe section has two reserved connection door holes matched with the pipe channel two shell, and the pipe mechanical equipment is lifted out after the pushing of the pipe channel is completed.

[0010] Step three, the ordinary pipe section two with smaller cross section is launched from the pipe launching well two and pushed to the pipe, and when the pipe cutter of the later implemented pipe is flush with the outside of the special pipe section of the pipe channel one, the filling body is injected through the grouting hole of the special pipe section to reinforce the water stop, and then the reserved connection door hole of the special pipe section of the pipe channel one is removed.

[0011] Step four, after the door hole is removed, the pipe with smaller cross section enters the special pipe section of the pipe channel one and continues to push until the pipe cutter of the later implemented pipe is flush with the inside of the special pipe section of the pipe channel one, and then the filling body is injected through the grouting hole of the special pipe section to reinforce the water stop, and then the reserved connection door hole of the special pipe section of the pipe channel one is removed.

[0012] Step five, after the door hole is removed, the pipe with smaller cross section continues to push after passing through the special pipe section, and is lifted out after pushing to the pipe receiving well two.

[0013] Step six, the ordinary pipe section two with smaller cross section in the special pipe section is removed to connect the pipe channels implemented in sequence, and the gap between the special pipe section connection door hole and the later implemented pipe channel two is closed by injecting the filling body, so as to realize the cross intersection pipe channel.

[0014] Preferably, in step three, the width of the special pipe section is greater than that of the ordinary pipe section, and the special pipe section is provided with a ring frame on both sides to match the later pipe steel shell with smaller cross section.

[0015] Preferably, in step one, the two pipes are two pipes with different cross sections.

[0016] Working principle: through two pipes with different cross-sectional sizes, and setting special pipe joints, the large cross-section pipe jacking is completed in advance, and the small cross-section pipe channel is implemented in the later period, the small cross-section pipe jacks through the special pipe joint of the large cross-section pipe, the cross intersection pipe channel is connected, on the one hand, the pipe channel is applied to the interactive underground channel technology, the technical limitations of the pipe channel connection are got rid of, the adaptation range of the pipe channel is enhanced, on the other hand, the cross intersection pipe channel is used, the number and length of the overpass channel of the project are reduced, the mechanical equipment investment and the engineering cost are correspondingly reduced, meanwhile, the problems of ground traffic relief and pipeline relocation in the early stage are solved, the early stage cost of the project is saved, and the construction time and construction cost of the project are improved.

[0017] The application provides a construction method of cross intersection pipe channel.

[0018] The application realizes the connection of the cross intersection pipe channel by two pipes with different cross-sectional sizes and special pipe joints, the large cross-section pipe jacking is completed in advance, the small cross-section pipe channel is implemented in the later period, the small cross-section pipe jacks through the special pipe joint of the large cross-section pipe, the cross intersection pipe channel is connected, on the one hand, the pipe channel is applied to the interactive underground channel technology, the technical limitations of the pipe channel connection are got rid of, the adaptation range of the pipe channel is enhanced, on the other hand, the cross intersection pipe channel is used, the number and length of the overpass channel of the project are reduced, the mechanical equipment investment and the engineering cost are correspondingly reduced, meanwhile, the problems of ground traffic relief and pipeline relocation in the early stage are solved, the early stage cost of the project is saved, and the construction time and construction cost of the project are improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a plane relationship schematic view of the cross intersection pipe channel in the application.

[0020] Figure 2 It is a plane relationship schematic view of the pipe starting well and the receiving well after completion in the application.

[0021] Figure 3 It is a plane schematic view of the pipe channel after one implementation in the application.

[0022] Figure 4 It is a longitudinal section schematic view of the pipe channel after one implementation in the application.

[0023] Figure 5 It is a transverse section schematic view of the pipe channel after one implementation in the application.

[0024] Figure 6 It is a front plane schematic view of the pipe channel two entering the pipe channel one in the application.

[0025] Figure 7 It is a longitudinal section schematic view of the pipe channel two entering the pipe channel one in the application.

[0026] Figure 8 is the plan view of the second pipe jacking channel entering the first pipe jacking channel in the present application;

[0027] Figure 9 is the longitudinal section view of the second pipe jacking channel entering the first pipe jacking channel in the present application;

[0028] Figure 10 is the plan view of the second pipe jacking channel crossing the first pipe jacking channel in the present application;

[0029] Figure 11 is the longitudinal section view of the second pipe jacking channel crossing the first pipe jacking channel in the present application;

[0030] Figure 12 is the plan view of the completed cross pipe jacking channel in the present application;

[0031] Figure 13 is the longitudinal section view of the second pipe jacking channel after the cross pipe jacking channel is completed in the present application;

[0032] Figure 14 is the longitudinal section view of the first pipe jacking channel after the cross pipe jacking channel is completed in the present application.

[0033] In the figure, 1 is the first pipe jacking well, 2 is the first pipe receiving well, 3 is the common pipe section, 4 is the special pipe section, 5 is the connection door, 6 is the second pipe jacking well, 7 is the second pipe receiving well, 8 is the planned road red line, 9 is the pipe jacking machine shell, 10 is the pipe jacking machine front shield, 11 is the pipe jacking machine disc, 12 is the filling body, and 13 is the second common pipe section. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0035] Embodiment:

[0036] Please refer to the drawings in the following Figure 1 - the drawings in the following Figure 14 The embodiment of the present application provides a construction method of cross pipe jacking channel, which comprises the following steps:

[0037] Step 1: two pipe jacking wells and two pipe receiving wells located in the four quadrants of the cross road intersection are implemented in advance by open excavation method, the first pipe jacking well 1, the second pipe jacking well 6, the first pipe receiving well 2 and the second pipe receiving well 7 are located in the opposite quadrants outside the planned road red line 8 of the cross road intersection.

[0038] The initial phase will involve two pipe jacking starting points and two receiving points located in the four quadrants of a crossroads. The starting and receiving points will be located in opposite diagonal quadrants of the crossroads.

[0039] Step 2: Initially, push the larger-section ordinary pipe section 3 in the cross-shaped pipe jacking channel using the pipe jacking machine.

[0040] The mechanical equipment starts from the pipe jacking starting shaft. During the jacking process of the pipe jacking channel, a special pipe section 4 is set at the joint position of the cross-shaped pipe jacking channel. The special pipe section has two pre-reserved connection holes 5 that match the shell of the second pipe jacking channel. After the initial pipe jacking channel is completed, the pipe jacking mechanical equipment is lifted out.

[0041] In the initial stage of jacking the cross-shaped pipe jacking channel, the pipe jacking machinery is launched from the pipe jacking starting shaft. During the jacking process of the pipe jacking channel, a special pipe section is set at the connection position of the cross-shaped pipe jacking channel. The special pipe section has two reserved door openings that match the second shell of the pipe jacking channel. After the initial pipe jacking channel is completed, the pipe jacking machinery is lifted out.

[0042] Step 3: The smaller cross-section ordinary pipe section 2 13 is launched from the jacking starting well 2 and pushed towards the completed jacking pipe. When the jacking cutterhead is flush with the outside of the special pipe section 4 of the jacking pipe channel 1, the filling material is injected through the grouting hole of the special pipe segment to reinforce and stop the water. Then the reserved connection hole 5 of the special pipe section of the jacking pipe channel 1 is broken.

[0043] The smaller cross-section jacking pipe is launched from the second jacking shaft and pushed towards the completed jacking pipe. When the jacking pipe cutterhead is flush with the outside of the special pipe section of the jacking pipe channel one, the filling material is injected through the grouting hole of the special pipe segment to reinforce and stop water flow. Then the reserved doorway of the special pipe section of the jacking pipe channel one is broken.

[0044] Step 4: After breaking through the doorway, the smaller cross-section jacking pipe enters the special pipe section 4 of the jacking pipe channel and continues to push until the jacking pipe cutter head implemented later is flush with the inner side of the special pipe section 4 of the jacking pipe channel. Then, filler is injected through the grouting hole of the special pipe section 4 to reinforce and stop water. Finally, the reserved connecting doorway 5 of the special pipe section of the jacking pipe channel is broken.

[0045] After breaking through the opening, the smaller cross-section jacking pipe enters the jacking channel one and continues to push until the jacking cutterhead, which will be implemented later, is flush with the inside of the special pipe section of the jacking channel one. Then, the filling material is injected through the grouting hole of the special pipe segment to reinforce and stop the water. Finally, the reserved opening of the special pipe section of the jacking channel one is broken.

[0046] Step 5: After breaking through the doorway, the smaller cross-section jacking pipe passes through the specially made pipe section 4 and continues to be pushed until it reaches the jacking pipe receiving well 2 7, where it is then lifted out.

[0047] After breaking the door hole, the smaller cross-section pipe continues to push into the top pipe channel 1, and is hoisted out after being pushed into the top pipe channel 2 receiving well.

[0048] Step six, break the smaller cross-section ordinary pipe section two 13 in the special pipe section 4, so that the top pipe channels implemented in succession are communicated, and the gap between the special pipe section connecting door hole 5 and the later implemented top pipe channel two is closed by injecting a filling body, realizing the cross intersection of the top pipe channels.

[0049] Break the smaller cross-section pipe in the special pipe section, so that the top pipe channels implemented in succession are communicated, and the gap between the special pipe section reserved door hole and the later implemented top pipe channel two is closed by injecting a filling body, realizing the cross intersection of the top pipe channels.

[0050] In step three, the special pipe piece is wider than the ordinary top pipe piece, and the ring frame is arranged on both sides of the special pipe piece to match the later smaller cross-section top pipe shell.

[0051] In step one, the two top pipes are two top pipes with different cross-section sizes.

[0052] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method of constructing a cross-intersecting pipe j acking tunnel, characterized in that, It comprises two top pipes and the following steps: Step one, using open cut method to implement two top pipe starting and two receiving wells in four quadrants of the intersection of the cross road, top pipe starting well one (1), top pipe starting well two (6) and top pipe receiving well one (2), top pipe receiving well two (7) are located in the opposite quadrants outside the planning road red line (8) of the cross road intersection; Step two, ordinary pipe section one (3) with larger cross section in the cross intersection top pipe channel is first pushed, and the top pipe mechanical equipment starts from the top pipe starting well. During the pushing process of the top pipe channel, a special pipe section (4) is arranged at the connection position of the cross intersection top pipe channel, which has two reserved connection door holes (5) matched with the top pipe channel two shell. After the first top pipe channel is pushed to completion, the top pipe mechanical equipment is lifted out; Step three, ordinary pipe section two (13) with smaller cross section is started and pushed from the top pipe starting well two to the top pipe, and when the top pipe cutter head of the later implemented top pipe is flush with the outside of the special pipe section (4) of the top pipe channel one, the filling body is injected through the grouting hole of the special pipe section to reinforce and stop water, and then the reserved connection door hole (5) of the special pipe section of the top pipe channel one is broken; Step four, after breaking the door hole, the smaller cross section top pipe enters the special pipe section (4) of the top pipe channel one and continues to push until the top pipe cutter head of the later implemented top pipe is flush with the inside of the special pipe section (4) of the top pipe channel one, and then the filling body is injected through the grouting hole of the special pipe section (4) to reinforce and stop water, and then the reserved connection door hole (5) of the special pipe section of the top pipe channel one is broken; Step five, after breaking the door hole, the smaller cross section top pipe continues to push after passing through the special pipe section (4), and is lifted out after reaching the top pipe receiving well two (7); Step six, the smaller cross section ordinary pipe section two (13) in the special pipe section (4) is broken, so that the top pipe channels implemented in succession are connected, and the gap between the special pipe section connection door hole (5) and the later implemented top pipe channel two is closed by injecting filling body, realizing the cross intersection top pipe channel.

2. The construction method of a cross intersection pipe jacking channel according to claim 1, characterized in that: In step three, the width of the special pipe section is greater than that of the ordinary top pipe section, and the special pipe section is provided with a ring frame on both sides to match the later smaller cross section top pipe shell.

3. The construction method of a cross intersection pipe jacking channel according to claim 1, characterized in that: In step one, the two top pipes are two top pipes with different cross sections.

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