Pipe jacking construction method for underground engineering construction

Abstract

The application discloses a pipe jacking side launching construction method for underground engineering construction, and the method comprises the following steps: constructing a translation launching well; constructing a translation launching channel starting from the translation launching well; laying a track at the bottom of the translation launching channel and arranging a pipe joint limiting mechanism at the top of the translation launching channel; moving a pipe jacking front shield and a pipe jacking tail shield of a pipe jacking machine to the end of the translation launching channel in sequence by using the track, and assembling the pipe jacking machine; moving a pipe joint to the end of the translation launching channel by using the track, limiting the posture of the pipe joint by using the pipe joint limiting mechanism during the movement; and performing pipe jacking construction. According to the technical scheme, the pipe jacking construction can be realized under the condition that the direct launching condition is not met, the interference of ground facilities is effectively avoided, the influence on the surrounding environment is reduced, the stability of the pipe joint during transportation in the pipe jacking construction is ensured, and therefore, the related safety hazards are avoided.

Description

Technical Field

[0001] This application relates to the field of tunnel excavation engineering technology, specifically to a method for side-starting construction of pipe jacking for underground engineering construction. Background Technology

[0002] With the rapid development of cities, the development and utilization of underground space is receiving increasing attention. In infrastructure construction such as urban rail transit and underground utility tunnels, tunnel engineering is becoming increasingly widespread, and construction requirements are becoming increasingly stringent. Traditional tunnel construction methods, whether open-cut or cut-and-cover, rely on manual excavation. However, with continuous technological breakthroughs in my country and the localization of large-scale excavation equipment, traditional tunnel construction methods have been replaced by shield tunneling and pipe jacking. Both shield tunneling and pipe jacking use cutterhead propulsion for excavation, but their tunnel structure formation and propulsion methods differ, resulting in significant differences in construction methods. Shield tunneling requires continuously transporting new prefabricated lining sections to the front shield, where they are spliced ​​on the newly excavated tunnel face. The propulsion system's jacks then support the newly assembled lining sections. Pipe jacking, on the other hand, fixes the propulsion system at the starting shaft, using a ring of new sections at the front of the jacking mechanism to continuously push forward the previously constructed sections.

[0003] However, both shield tunneling and pipe jacking require a certain amount of ground space at the launch site to excavate a shaft for equipment hoisting. In actual engineering projects, especially in urban core areas or confined environments, it is often difficult to find a launch site that meets these conditions, which greatly limits the application scope of shield tunneling and pipe jacking construction technologies. To solve this problem, side-launching technology emerged. Side-launching technology was initially proposed to address the problem of insufficient launch sites encountered in shield tunneling construction. By excavating a shaft at a location far from the launch point, a horizontal transport system is used to transport the shield machine and auxiliary equipment to the predetermined launch location, thereby achieving the goal of underground launch of the shield machine. This method not only effectively avoids interference from surface facilities but also reduces the impact on the surrounding environment, improving construction efficiency and safety.

[0004] However, despite the significant success of side-launching technology in shield tunneling, its economic viability remains low for short-distance tunnel construction. Unlike side-launching shield tunneling, which involves installing segments of the tunnel jacking system, side-launching pipe jacking requires transporting prefabricated segments as a whole from the horizontally moving launch shaft to the underground tunnel at the launch site. The existing tracks used for transporting shield tunneling machines are prone to overturning when transporting segments with a planar structure due to wind loads, track unevenness, and the inherent instability of the segments, posing a significant safety hazard. Therefore, there is an urgent need in this field to provide a side-launching pipe jacking construction scheme for underground engineering projects to address these issues. Summary of the Invention

[0005] In view of this, this application proposes a method for side-starting construction of pipe jacking for underground engineering construction, the method comprising:

[0006] Perform translational well construction;

[0007] A translational launching channel is constructed starting from the aforementioned launching shaft; the end of the translational launching channel is the starting point of the required launching tunnel.

[0008] A track is laid at the bottom of the translational starting channel, and a pipe section limiting mechanism is installed at the top of the translational starting channel;

[0009] The pipe jacking machine's front shield and tail shield are moved sequentially to the end of the translational starting channel using the track, and the pipe jacking machine is then assembled.

[0010] The tube section is moved to the end of the translational starting channel using the track. During the movement, the tube section limiting mechanism limits the posture of the tube section.

[0011] Pipe jacking construction is carried out.

[0012] Preferably, moving the front shield of the pipe jacking machine to the end of the translational starting channel using the track includes:

[0013] An electric flatbed cart is installed in the track and positioned within the translational launching shaft.

[0014] The front shield of the jacking pipe was assembled on the electric flatbed truck using hoisting equipment.

[0015] The electric flatbed vehicle is pushed forward to move the assembled jacking shield to the end of the translational starting channel;

[0016] The front shield of the pipe jacking machine is disengaged from the track and then moved horizontally onto the base of the pipe jacking machine; the base is located on the end platform of the horizontal starting channel.

[0017] More preferably, the assembly of the tail shield of the pipe jacking machine is completed using the track, including:

[0018] After the splicing and movement of the pipe jacking shield are completed, the electric flatbed truck is moved back into the translational starting shaft;

[0019] The tail shield of the jacking pipe was assembled on the electric flatbed truck using hoisting equipment.

[0020] The electric flatbed vehicle is pushed forward to move the assembled pipe jacking tail shield to the end of the translational starting channel;

[0021] The tail shield of the pipe jacking machine is disengaged from the track and placed on the base of the pipe jacking machine.

[0022] More preferably, the method further includes:

[0023] Notches are made on both sides of the end platform near the track;

[0024] The electric flatbed cart is equipped with a placement platform on its top and telescopic anti-shear rods on both sides. When the telescopic anti-shear rods are inserted into the notches, the electric flatbed cart stops moving.

[0025] More preferably, the method further includes:

[0026] A back wall, a cylinder frame, and a jacking iron are provided on the side opposite to the jacking direction of the starting tunnel in the translation starting channel. The cylinder frame contains a jacking cylinder. A vertical jack is provided at the bottom of the electric flatbed truck.

[0027] The vertical jack lifts the placement platform, making its upper surface flush with the upper surface of the base. The jacking cylinder located on one side of the back wall pushes the jacking iron to move, causing the jacking iron to push the jacking pipe front shield or jacking pipe tail shield placed on the placement platform off the track and move onto the base.

[0028] More preferably, the tube segment is moved to the end of the translational starting channel using the track. During the movement, the tube segment limiting mechanism limits the posture of the tube segment, including:

[0029] Multiple transverse steel beams are horizontally erected at the top of the translation starting channel. At the bottom of the transverse steel beams, a pair of longitudinal steel beams are arranged along the length of the track and pass through the translation starting channel. The transverse steel beams and the longitudinal steel beams are welded together by triangular plates, so that the transverse steel beams, the longitudinal steel beams and the triangular plates constitute the pipe section limiting mechanism.

[0030] After the splicing and movement of the tail shield of the pipe jacking project are completed, the electric flatbed truck is moved back into the translational starting shaft;

[0031] The pipe section is placed on the electric flatbed truck using hoisting equipment, and the top of the pipe section is positioned between the pair of longitudinal steel beams. The pair of longitudinal steel beams are used to limit the posture of the pipe section.

[0032] The electric flatbed vehicle is pushed forward, causing the pipe section to move to the end of the translational starting channel.

[0033] More preferably, the propulsion device of the electric flatbed truck adopts a hydraulic propulsion rod.

[0034] Further preferably, the spacing between a pair of longitudinal steel beams should meet the following requirements:

[0035] ;

[0036] ;

[0037] in, This represents the difference between the spacing between a pair of longitudinal steel beams and the width of the pipe section. Indicates the height of the pipe section. Indicates the track inclination angle. Indicates the horizontal inclination angle of the track cross section; Indicates the distance between the two parallel steel rails of the track. This indicates the unevenness of the track.

[0038] More preferably, the method further includes:

[0039] At least one force sensor is installed on the longitudinal steel beam to monitor the load applied to the longitudinal steel beam by the pipe section;

[0040] If the load exceeds the threshold, then the movement of the pipe section is stopped or the horizontal inclination angle of the bottom cross section of the pipe section is adjusted so that the load meets the threshold requirement; wherein,

[0041] The anti-overturning force provided by the longitudinal steel beam Must meet:

[0042] ;

[0043] in, This represents the equivalent static wind load that the longitudinal steel beam can provide; Indicates the area affected by the wind load; This represents the weight of the pipe section. Indicates the height of the pipe section. Indicates the width of the pipe section. Indicates the track inclination angle. This indicates the horizontal inclination angle of the track cross section.

[0044] Preferably, the method further includes:

[0045] A road surface opening and closing lifting device is installed in the end platform on one side of the translation starting channel. The road surface of the end platform is divided into an opening section and a fixed section by the road surface opening and closing lifting device.

[0046] One end of the opening and closing section is lifted or lowered by the road opening and closing lifting device, and the other end is hinged to the fixed section.

[0047] When one end of the opening and closing section is lowered, the one end of the opening and closing section overlaps with the upper surface of the bottom of the top iron to form a road surface for transporting construction waste.

[0048] When one end of the opening and closing section is lifted, the one end of the opening and closing section is separated from the bottom upper surface of the top iron, and the jacking stroke of the jacking cylinder and the top iron are retracted to form a transport space for transporting the next pipe section.

[0049] According to the pipe jacking side-starting construction method for underground engineering provided in this application, a horizontal starting channel is constructed starting from the horizontal starting shaft. The front shield, tail shield, and pipe section are moved to the end of the horizontal starting channel using the track within the horizontal starting channel. When moving the pipe section, the posture of the pipe section is limited by the pipe section limiting mechanism. This not only enables pipe jacking construction under conditions where forward starting is not possible, effectively avoiding interference from ground facilities and reducing the impact on the surrounding environment, but also ensures the stability of the pipe section during transportation during pipe jacking construction, thereby avoiding related safety hazards.

[0050] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0051] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application, and the illustrative embodiments and descriptions thereof are used to explain this application. In the drawings:

[0052] Figure 1 A flowchart of a preferred embodiment of the pipe jacking side-starting construction method for underground engineering construction;

[0053] Figure 2 This is a schematic diagram of the end section of the translational starting channel in the preferred embodiment of this application;

[0054] Figure 3 This is a schematic diagram of an electric flatbed vehicle according to a preferred embodiment of this application;

[0055] Figure 4 This is a schematic diagram of the pipe section limiting mechanism in a preferred embodiment of this application;

[0056] Figure 5 This is another schematic diagram of the end section of the translational starting channel in the preferred embodiment of this application;

[0057] Figure 6 This is a schematic diagram of the jacking cylinder layout in a preferred embodiment of this application;

[0058] Figure 7 This is a schematic diagram of the overall plan of the tunnel in the preferred embodiment of this application.

[0059] Attached Figure Numbers: 1-Transfer Starting Shaft; 2-Transfer Starting Channel; 21-End Platform; 211-Notch; 212-Opening / Closing Section; 213-Fixed Section; 22-Back Wall; 23-Vertical Jack; 24-Personnel Access Channel; 25-Slag Discharge Channel; 251-Side Slag Discharge Port; 26-Lifting Ring; 27-Hydraulic Cylinder Frame; 28-Jack Cylinder; 29-Jack Iron; 3-Railway; 4-Pipe Section Limiting Mechanism; 41-Transverse Steel Beam; 42-Longitudinal Steel Beam; 43-Triangular Plate; 5-Pipe Jacking Machine; 51-Pipe Jacking Front Shield; 52-Pipe Jacking Tail Shield; 53-Base; 6-Pipe Section; 7-Starting Tunnel; 8-Electric Flatbed Cart; 81-Placement Platform; 82-Telescopic Shear Bar; 9-Road Surface Opening / Closing Lifting Device. Detailed Implementation

[0060] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0061] This application provides a side-starting construction method for pipe jacking in underground engineering construction, such as... Figure 1 As shown, it includes the following steps 110-160:

[0062] Step 110: Construct the translational launching well;

[0063] Specifically, the first step is to conduct a site survey, collecting geological data, information on underground pipeline distribution, and details of surrounding buildings and structures, assessing potential risks, and then developing a specialized construction plan. This plan includes the construction of the horizontally moving launching shaft, the horizontally moving launching tunnel, track laying, the horizontal assembly of the pipe jacking machine, and the horizontal movement of pipe sections. Experts review the plan to ensure its feasibility and safety. Furthermore, before construction, technical briefings and safety training must be provided to construction personnel, clarifying the construction process and safety precautions. Assembly tools and transportation equipment meeting the requirements of the specialized construction plan must be prepared, along with lighting, ventilation, communication tools, and safety protective equipment. After completing the construction preparations, in areas with low traffic volume, few pipelines, and no significant building or structure influencing factors, the plan dimensions of the horizontally moving launching shaft 1 are determined based on the dimensions of the pipe jacking machine components 5 and pipe sections 6, the assembly space, and the requirements for hoisting operations.

[0064] In one specific embodiment, an earth pressure balance pipe jacking machine 5 is selected based on the geological conditions. The pipe section 6 has a cross-sectional dimension of 11.8m × 7.92m and a thickness of 1.5m. Considering the personnel access passage 24 and the slag removal passage 25, the plan dimensions of the horizontally moving starting shaft 1 are chosen to be a square with a side length of 15.9m. The depth of the horizontally moving starting shaft 1 is determined to be 15m based on the pipe jacking axis elevation, the height of the pipe jacking machine, and the track laying requirements. According to the geological conditions and excavation depth, a suitable shaft wall support method is selected. After completing the support structure design, the excavation of the horizontally moving starting shaft 1 is carried out according to the design scheme. During construction, a continuous underground wall support method is used, with a wall thickness of 800 mm. During the excavation process, dewatering and drainage measures are taken to prevent water inrush and collapse within the shaft. After excavation is completed, acceptance is conducted to ensure that the dimensions and elevation meet the design requirements.

[0065] Step 120: Construct the translational launching channel, starting from the translational launching shaft;

[0066] Specifically, since some sites do not meet the conditions for constructing a launching shaft above the launching tunnel 7, a movable launching shaft 1 needs to be constructed on the side of the launching tunnel 7 as a launching site to provide an initial location for the equipment. Therefore, as... Figure 7 As shown, there must be a certain distance between the starting tunnel 7 and the translation starting shaft 1. If the equipment is to be transported from the translation starting shaft 1 to the required starting tunnel 7, a translation starting channel 2 needs to be built between the starting tunnel 7 and the translation starting shaft 1. The starting point of the translation starting channel 2 is the entrance of the translation starting shaft 1, and the end point is the starting point of the required starting tunnel 7.

[0067] When constructing and relocating the starting tunnel 2, the excavation method and support scheme for the starting tunnel 2 need to be determined based on the site geological conditions, surrounding environment, and tunnel length. Before construction, detailed construction surveying and setting out should be carried out to determine parameters such as the excavation axis, cross-sectional dimensions, and support locations of the starting tunnel 2. During excavation, excavation should be carried out in sections, and initial support should be implemented in a timely manner. Monitoring equipment can be used to monitor the deformation of the surrounding rock and the stress on the support structure in real time. After excavation, ground leveling and reinforcement should be carried out. During construction, the deformation of the support structure needs to be continuously monitored.

[0068] In one specific embodiment, the length of the translational starting channel 2 is approximately 55m.

[0069] Step 130: Lay a track at the bottom of the translation starting channel and install a pipe section limiting mechanism at the top of the translation starting channel;

[0070] Specifically, in combination Figure 2-7As shown, a track 3 is laid along the translational starting channel 2 to transport components such as the pipe jacking machine 5 and pipe sections 6. A pipe section limiting mechanism 4 is installed at the top of the translational starting channel 2. The track 3 and the pipe section limiting mechanism 4 start at the translational starting shaft 1 and end at the end of the translational starting channel 2. During the laying of the track 3, its horizontal position and elevation must be strictly controlled to ensure its smoothness and stability.

[0071] Step 140: Using the track, move the front shield and tail shield of the pipe jacking machine to the end of the translation starting channel, and assemble the pipe jacking machine.

[0072] Specifically, the pipe jacking machine 5 is a special equipment used to construct underground tunnels, which mainly forms tunnels by advancing prefabricated pipe sections below the ground surface. The pipe jacking shield 51 is used for cutting soil and guiding muck removal during construction. During the pipe jacking process, after each pipe section 6 is jacked, the next pipe section 6 is spliced ​​behind the previous pipe section 6.

[0073] The transportation methods for the pipe jacking front shield 51 and the pipe jacking tail shield 52 are the same, both using an electric flatbed cart 8 equipped with a propulsion device mounted on track 3 for movement and transportation. First, the electric flatbed cart 8 is temporarily fixed inside the translational starting shaft 1. The hoisting equipment at the translational starting shaft 1 is used to complete the splicing of the pipe jacking front shield 51 on the electric flatbed cart 8. Then, the propulsion device of the flatbed cart is activated to push the electric flatbed cart 8, causing the spliced ​​pipe jacking front shield 51, placed on the electric flatbed cart 8, to move along track 3 to the end of the translational starting channel 2, which is also the starting point of the required starting tunnel 7. Finally, with external force, the pipe jacking front shield 51 is detached from track 3 and translated onto the base 53 of the pipe jacking machine 5. The transportation method for the pipe jacking tail shield 52 is the same as that for the pipe jacking front shield 51, except that the pipe jacking front shield 51 is transported first, followed by the pipe jacking tail shield 52; this will not be described in detail here.

[0074] Among them, such as Figure 2-5 As shown, an end platform 21 is provided at the end of the translation starting channel 2, and the base 53 of the pipe jacking machine 5 is set on the end platform 21. The end platform 21 has notches 211 on both sides near the track 3. The top of the electric flatbed trolley 8 is provided with a placement platform 81 for placing various equipment. Telescopic anti-shear rods 82 are provided on both sides of the electric flatbed trolley 8. When the telescopic anti-shear rods 82 are inserted into the notches 211, the electric flatbed trolley 8 can stop moving in the track 3.

[0075] Additionally, at the end of the translation starting channel 2, on the side opposite to the jacking direction of the starting tunnel 7, a jacking iron 29, a cylinder frame 27, and a back wall 22 are sequentially installed. The cylinder frame 27 contains a jacking cylinder 28. The jacking cylinder 28 can be understood as a horizontal jack, used to provide power for the jacking operation, while the back wall 22 is fixed and can be used as a jacking support. At the same time, a vertically retractable jack 23 is installed at the bottom of the electric flatbed trolley 8. When the vertical jack 23 is in the retracted state, it can move with the electric flatbed trolley 8. When extended, it can lift the electric flatbed trolley 8 with the track ground as a fulcrum. At the end of the translation starting channel 2, the vertical jack 23 can lift the placement platform 81 on the electric flatbed trolley 8, so that the upper surface of the placement platform 81 is flush with the upper surface of the base 53. Then, the jacking cylinder 28, which is set on one side of the back wall 22, uses the back wall 22 as a fixed fulcrum at one end and pushes the jacking iron 29 to move at the other end, so that the jacking iron 29 pushes the jacking pipe front shield 51 or jacking pipe tail shield 52 placed on the placement platform 81 to disengage from the track 3 and move to the base 53.

[0076] Furthermore, a lifting ring 26 is arranged at the top of the end of the translation starting channel 2. After the remaining components of the pipe jacking machine 5 are transported to the end of the translation starting channel 2, the components can be lifted by the lifting ring 26 and the pipe jacking machine 5 can be assembled. Here, the remaining components of the pipe jacking machine 5 can be transported by an electric flatbed truck 8 or by other suitable means, which is not limited in this application.

[0077] Understandably, to ensure the smoothness and stability of track 3, it is also necessary to test track 3 and electric flatbed vehicle 8 to ensure that their load-bearing capacity and operating performance meet the requirements.

[0078] In one specific embodiment, the weights of the components of the pipe jacking machine 5 are shown in Table 1 below:

[0079] Table 1

[0080]

[0081] Based on the data in Table 1, the maximum load for a single translation is calculated to be approximately 281 tons. Therefore, the design bearing capacity of track 3 and electric flatbed trolley 8 can be set at 300 tons. The weight of each section of the lifting ring 26 is considered to be no more than 10 tons. Furthermore, the propulsion device of electric flatbed trolley 8 uses a speed-adjustable hydraulic propulsion rod with a propulsion speed of 0~10m / min. The soil outside the translation starting channel 2 at the location of the back wall 22 is reinforced by jet grouting as required by calculations.

[0082] Step 150: Use the track to move the tube section to the end of the translation starting channel. During the movement, use the tube section limiting mechanism to limit the posture of the tube section.

[0083] Specifically, the pipe segment 6 in this application is very large, with a rectangular ring cross-section. The length and width of the ring's cross-section are large, but the thickness of the pipe segment along the longitudinal direction of the tunnel is small. Therefore, the pipe segment needs to be transported upright. That is, during transportation, the pipe segment 6 needs to be transported "vertically" to the starting point of the required starting tunnel 7, and then the pipe segment 6 is not rotated so that the opening of the pipe segment 6 is directly facing the position of the starting tunnel 7 before subsequent pipe jacking construction is carried out.

[0084] During this process, pipe section 6 is also transported from the translation launch shaft 1 to the end of the translation launch channel 2 by an electric flatbed truck 8. However, because pipe section 6 is "tall and thin", it needs to be erected during transportation, making it very prone to overturning due to wind loads, uneven tracks, and other reasons. Based on this, this application also needs to limit the posture of pipe section 6 during transportation. A transverse steel beam 41 is erected at intervals on the top of the translation launch channel 2, and a pair of longitudinal steel beams 42 are set at the bottom of each transverse steel beam 41 along the length of the track 3, penetrating the translation launch channel 2. The transverse steel beams 41 and longitudinal steel beams 42 are welded together by triangular plates 43, so that the transverse steel beams 41, longitudinal steel beams 42 and triangular plates 43 constitute the pipe section limiting mechanism 4.

[0085] Based on the above structure, after the splicing and movement of the tail shield 52 of the pipe jacking is completed, the electric flatbed trolley 8 needs to be moved back into the translational launching shaft 1. Then, the pipe section 6 is placed on the electric flatbed trolley 8 using hoisting equipment, and the top of the pipe section 6 is positioned between a pair of longitudinal steel beams 42. The pair of longitudinal steel beams 42 are used to limit the posture of the pipe section 6. Finally, the electric flatbed trolley 8 is pushed forward, so that the pipe section 6 moves along the track 3 to the end of the translational launching channel 2.

[0086] The spacing between each transverse steel beam 41 can be set by those skilled in the art according to the specific conditions of the tunnel. The spacing between a pair of longitudinal steel beams 42 should satisfy expressions (1)-(2):

[0087] (1)

[0088] (2)

[0089] in, This represents the difference between the spacing between a pair of longitudinal steel beams 42 and the width of pipe section 6. Indicates the height of pipe section 6. This indicates the tilt angle of track 3. This indicates the horizontal inclination angle of the cross section of track 3. This indicates the distance between the two parallel rails of track 3. This indicates the unevenness of track 3.

[0090] In addition, this application can also monitor the load on the longitudinal steel beam 42 in real time to determine whether the overturning degree is serious and whether corresponding measures should be taken.

[0091] At least one force sensor (not shown in the figure) is installed on the longitudinal steel beam 42 to monitor the load applied to the longitudinal steel beam 42 by the pipe section 6. If there are multiple force sensors, their spacing can be set as needed.

[0092] When the force sensor detects that the load on the longitudinal steel beam 42 exceeds a preset threshold, it indicates that the pipe section 6 has severely overturned. It is necessary to stop moving the pipe section 6, adjust the horizontal tilt angle of the bottom cross section of the pipe section 6, or retract the pipe section 6 to ensure the load meets the threshold requirement. Specifically, stopping or retracting the pipe section 6 can be achieved by controlling the electric flatbed trolley 8 to stop or retract. Adjusting the horizontal tilt angle of the bottom cross section of the pipe section 6 can be achieved by using the vertical jack 23 to fine-tune the horizontal tilt angle of the electric flatbed trolley 8, thereby adjusting the horizontal tilt angle of the bottom cross section of the pipe section 6.

[0093] In addition, the anti-overturning force provided by the longitudinal steel beam 42 It must satisfy expression (3):

[0094] (3)

[0095] in, This represents the equivalent static wind load that longitudinal steel beam 42 can provide; Indicates the area affected by the wind load; This represents the weight of pipe section 6. This indicates the width of pipe section 6.

[0096] In one specific embodiment, both the transverse steel beams 41 and the longitudinal steel beams 42 are made of 588mm×300mm×12mm×20mm H-beams, and the transverse steel beams 41 are arranged at 3m intervals.

[0097] Step 160: Proceed with pipe jacking construction;

[0098] Specifically, the assembled pipe jacking machine 5 is inspected and debugged to ensure that all systems are operating normally. The pipe jacking machine 5 and the jacking cylinder 28 are started to begin the jacking operation. During the jacking process, parameters such as the attitude, thrust, and earth pressure of the pipe jacking machine 5 are monitored in real time to ensure that the pipe jacking machine 5 advances according to the designed axis and slope. After the jacking operation of the current pipe section 6 is completed, the jacking stroke of the jacking cylinder 28 and the jacking iron 29 are retracted. The next pipe section 6 is moved to the starting point of the starting tunnel 7 by the electric flatbed cart 8 within the translation starting channel 2. The placement platform 81 on the electric flatbed cart 8 is finely adjusted by the vertical jack 23 so that the upper surface of the placement platform 81 is flush with the upper surface of the base 53. The next pipe section 6 is aligned with the previous pipe section 6 and assembled. The jacking cylinder 28 continues to push the jacking iron 29 to move, so that the jacking iron 29 pushes the next pipe section 6 to carry out the next cycle of jacking operation.

[0099] Meanwhile, during the jacking operation, excavated soil will be continuously generated, which needs to be removed from the construction site in a timely manner. In this application, the translation starting channel 2 can be divided into two spaces with track 3 as the boundary. One space can be used as a personnel access channel 24 for personnel passage, and the other space can be used as a muck removal channel 25 for muck removal.

[0100] However, this application uses a side-launching method, meaning the excavated soil generated during the jacking operation cannot be directly and vertically transported out from the starting point of the launching tunnel 7. Instead, it needs to be transported from the launching tunnel 7 to the end of the horizontal launching channel 2 using dump trucks or other equipment, and then transported out through the horizontal launching channel 2. Therefore, the end of the horizontal launching channel 2 serves as both a space for excavated soil transfer and a space for pipe section entry and exit. Without a reasonable spatial layout, conflicts will arise between the locations of excavated soil transfer and pipe section entry and exit.

[0101] Therefore, in combination Figure 5 , Figure 7 As shown, this application provides a road surface opening and closing lifting device 9 hingedly installed in the end platform 21 on the side of the slag discharge channel 25 at the end of the translation starting channel 2. Using this road surface opening and closing lifting device 9, the road surface of this side of the end platform 21 can be divided into an opening and closing section 212 and a fixed section 213.

[0102] When the jacking cylinder 28 in the cylinder frame 27 jacks in, it pushes the jacking iron 29 in, thereby causing the jacking iron 29 to push the pipe section 6 in.

[0103] Here, the placement of the jacking cylinder 28 also needs to consider the route for transporting the excavated soil. For example... Figure 6As shown, in the conventional configuration of the jacking cylinder 28, since forward launching is used, the top of the starting point of the launching tunnel is the launching shaft, and the excavated soil can be directly hoisted vertically from the launching shaft. Therefore, when arranging the jacking cylinder 28, it is only necessary to avoid the vertical transport position of the launching shaft. However, in this application, there is no outlet at the top of the starting point of the launching tunnel 7 that can be used to transport the excavated soil. The excavated soil needs to be transported through the side excavation port 251 and the excavation channel 25 from the side of the translational launching channel 2 to the translational launching shaft 1, and then hoisted vertically out. Therefore, when arranging the jacking cylinder 28 in this application, it is also necessary to avoid the position of the side excavation port 251.

[0104] For example Figure 5 As shown, the end of the opening / closing section 212 near the pipe section 6 can be raised or lowered using the road surface opening / closing lifting device 9, while the other end is hinged to the fixed section 213. When it is necessary to transport excavated soil, the end of the opening / closing section 212 near the pipe section 6 is lowered, and this end face overlaps with the bottom upper surface of the top iron 29, forming a road surface for transporting excavated soil. When it is necessary to push in the next pipe section 6, the end of the opening / closing section 212 near the pipe section 6 is raised, and this end face is separated from the bottom upper surface of the top iron 29. At this time, the top iron 29 also retracts as the pushing cylinder 28 retracts during its pushing stroke. A transport space for transporting the next pipe section 6 can be formed between the opening / closing section 212 and the already pushed-in pipe section 6, so that the next pipe section 6 can be transported to this location along the track 3.

[0105] Throughout the construction process, continuous monitoring of ground settlement, the surrounding environment, and the deformation of the support structure is necessary, with timely measures taken to correct deviations. The circulating pipe section translation and jacking operations continue until the pipe jacking machine 5 reaches the receiving well, completing the entire pipe jacking construction. Furthermore, this application allows for pipe jacking construction in a water-bearing environment, eliminating the need for dewatering of the main channel and significantly reducing project costs.

[0106] According to the pipe jacking side-starting construction method for underground engineering provided in this application, a horizontal starting channel is constructed starting from the horizontal starting shaft. The front shield, tail shield, and pipe section are moved to the end of the horizontal starting channel using the track within the horizontal starting channel. When moving the pipe section, the posture of the pipe section is limited by the pipe section limiting mechanism. This not only enables pipe jacking construction under conditions where forward starting is not possible, effectively avoiding interference from ground facilities and reducing the impact on the surrounding environment, but also ensures the stability of the pipe section during transportation during pipe jacking construction, thereby avoiding related safety hazards.

[0107] The preferred embodiments of this application have been described in detail above. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0108] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0109] Furthermore, various different embodiments of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed by this invention.

Claims

1. A pipe jacking side launching construction method for underground engineering construction, characterized in that, The method comprises: A translation starting well (1) is constructed; A translation starting channel (2) is constructed starting from the translation starting well (1); the end of the translation starting channel (2) is the starting point of the required starting tunnel (7); A track (3) is laid at the bottom of the translation starting channel (2), and a pipe joint limiting mechanism (4) is arranged at the top of the translation starting channel (2); The pipe jacking machine (5) is assembled by moving the pipe jacking front shield (51) and the pipe jacking tail shield (52) of the pipe jacking machine (5) to the end of the translation starting channel (2) in sequence by using the track (3); The pipe joint (6) is moved to the end of the translation starting channel (2) by using the track (3), and the posture of the pipe joint (6) is limited by using the pipe joint limiting mechanism (4) during the movement; Pipe jacking construction is carried out, The pipe jacking machine (5) is assembled by moving the pipe jacking front shield (51) of the pipe jacking machine (5) to the end of the translation starting channel (2) by using the track (3), which comprises: An electric flat car (8) is arranged in the track (3), and the electric flat car (8) is located in the translation starting well (1); The pipe jacking front shield (51) is spliced on the electric flat car (8) by using a hoisting machine; The electric flat car (8) is pushed to move the spliced pipe jacking front shield (51) to the end of the translation starting channel (2); The pipe jacking front shield (51) is separated from the track (3) and is translated to the base (53) of the pipe jacking machine (5); the base (53) is arranged on the end platform (21) of the translation starting channel (2), The posture of the pipe joint (6) is limited by using the pipe joint limiting mechanism (4) during the movement of the pipe joint (6) to the end of the translation starting channel (2) by using the track (3), which comprises: A plurality of transverse steel beams (41) are arranged transversely at the top of the translation starting channel (2), a pair of longitudinal steel beams (42) are arranged at the bottom of the transverse steel beams (41) along the length direction of the track (3) and penetrate through the translation starting channel (2), and the transverse steel beams (41) and the longitudinal steel beams (42) are respectively welded and connected by triangular plates (43), so that the transverse steel beams (41), the longitudinal steel beams (42) and the triangular plates (43) constitute the pipe joint limiting mechanism (4); After the splicing and movement of the pipe jacking tail shield (52) are completed, the electric flat car (8) is moved back to the translation starting well (1); The pipe joint (6) is placed on the electric flat car (8) by using a hoisting machine, and the top of the pipe joint (6) is located between the pair of longitudinal steel beams (42), and the posture of the pipe joint (6) is limited by using the pair of longitudinal steel beams (42); The electric flat car (8) is pushed to move the pipe joint (6) to the end of the translation starting channel (2), The method further comprises: At least one force sensor is arranged on the longitudinal steel beam (42) to monitor the load applied by the pipe joint (6) on the longitudinal steel beam (42). If the load is greater than a threshold value, stop moving or adjusting the horizontal inclination angle of the bottom cross section of the pipe section (6) to make the load meet the threshold requirement; wherein, the anti-overturning force that can be provided by the longitudinal steel beams (42) must be met: ； wherein, represents the equivalent static wind load that can be provided by the longitudinal steel beam (42); represents the wind load action area; represents the gravity of the pipe section (6), represents the height of the pipe section (6), represents the width of the pipe section (6), represents the inclination angle of the track (3), represents the horizontal inclination angle of the track (3).

2. The method of claim 1, wherein, The track (3) is used to complete the splicing of the pipe jacking tail shield (52) of the pipe jacking machine (5), which comprises: After the splicing and movement of the pipe jacking front shield (51) are completed, the electric flat car (8) is moved back into the translation starting shaft (1); The splicing of the pipe jacking tail shield (52) on the electric flat car (8) is completed by using a hoisting machine; The electric flat car (8) is pushed to move the spliced pipe jacking tail shield (52) to the end of the translation starting channel (2); The pipe jacking tail shield (52) is separated from the track (3) and placed on the base (53) of the pipe jacking machine (5).

3. The method according to claim 1 or 2, characterized in that, The method further comprises: Notches (211) are formed on both sides of the track (3) near the end platform (21); The top of the electric flat car (8) is provided with a placement platform (81), and both sides are provided with telescopic shear-resistant rods (82), which are inserted into the notches (211), and the electric flat car (8) stops moving.

4. The method of claim 3, wherein, The method further comprises: A back wall (22), an oil cylinder frame (27) and a jacking iron (29) are provided on the side of the translation starting channel (2) opposite to the jacking direction of the starting tunnel (7), and the oil cylinder frame (27) has a jacking oil cylinder (28); the bottom of the electric flat car (8) is provided with a vertical jack (23); The vertical jack (23) lifts the placement platform (81) to make the upper surface of the placement platform (81) flush with the upper surface of the base (53), the jacking oil cylinder (28) provided on the side of the back wall (22) pushes the jacking iron (29) to move, so that the jacking iron (29) pushes the pipe jacking front shield (51) or the pipe jacking tail shield (52) placed on the placement platform (81) to separate from the track (3) and move to the base (53).

5. The method of claim 1, wherein, The propulsion device of the electric flat car (8) adopts a hydraulic propulsion rod.

6. The method of claim 1, wherein: The spacing between a pair of longitudinal steel beams (42) should meet: ； ； wherein, represents the difference between the spacing between a pair of longitudinal steel beams (42) and the width of the pipe section (6), represents the height of the pipe section (6), represents the inclination angle of the track (3), represents the horizontal inclination angle of the track (3) cross-section; represents the spacing between the two parallel rails of the track (3), represents the unevenness of the track (3).

7. The method of claim 4, wherein, The method further comprises: A road opening and closing lifting device (9) is provided in the end platform (21) on one side of the translation starting channel (2), and the road surface of the end platform (21) is divided into an opening and closing section (212) and a fixed section (213) by using the road opening and closing lifting device (9); One end of the opening and closing section (212) is lifted or lowered by using the road opening and closing lifting device (9), and the other end is hinged to the fixed section (213); When one end of the opening and closing section (212) is lowered, the one end of the opening and closing section (212) is overlapped with the upper surface of the bottom of the jacking iron (29) to form a spoil transportation road surface; When one end of the opening and closing section (212) is lifted, the one end of the opening and closing section (212) is separated from the top iron (29) bottom upper surface, the jacking stroke of the jacking cylinder (28) and the top iron (29) are retracted to form a transport space for transporting the next pipe section (6).

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