A construction method for jacking a reinforced pipe joint in a soft upper and hard lower stratum

Abstract

The present invention provides a construction method for jacking and reinforcing a pipe joint in a soft upper and hard lower stratum, including prefabricated pipe joints. Socket steel rings and spigot steel rings are embedded at both ends of the pipe joints. Two adjacent pipe joints are connected end to end, and the socket steel ring is sealed and abutted inside the spigot steel ring. A pressure-bearing steel ring is fixedly arranged on the inner side of the end of the socket steel ring. An inner joint gap is formed between two adjacent pipe joints, and a deformation ring is arranged in the inner joint gap. The deformation ring is formed by splicing a plurality of arc rings into a complete ring. The socket plate and the spigot plate in the arc ring slide relative to each other. A plurality of spigot grooves are arranged on one side of the spigot plate. Sliding blocks are arranged in the spigot grooves and are fixed on the socket plate. A threaded shaft is connected by threads on one side of the spigot groove, and the end of the threaded shaft abuts against the sliding block. By designing the socket plate to connect the sliding blocks at different longitudinal positions of the arc grooves, the process attitude of each pipe joint during jacking can be finely adjusted, the risk of deviation during jacking in a soft upper and hard lower stratum can be reduced, and the attitude of the pipe joint can also be adjusted and corrected after deviation to achieve pipe jacking correction.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering, and particularly relates to a construction method for jacking a reinforced pipe joint in a soft upper and hard lower stratum. Background Art

[0002] With the improvement of people's living standards and the increasingly strict environmental protection requirements, the demand for urban underground pipeline construction is higher. Among them, the pipe jacking method, as an economical and practical underground pipeline tunneling technology, has a very wide coverage in engineering projects. However, with the increase of construction projects, the geological background of pipe jacking projects has become more and more complex. Affected by factors such as tectonic geology and stratum changes, pipe jacking is often in the soft upper and hard lower stratum environment composed of soil layer and rock layer. During construction, due to factors such as uneven stress and eccentric load, engineering accidents such as jacking deviation and pipe joint damage are extremely likely to occur, which is the key technical problem that has been concerned in pipe jacking project construction.

[0003] In order to solve the problems of jacking deviation and pipeline damage in the construction of pipe jacking projects under the conditions of soft upper and hard lower strata, a series of measures such as pipeline drag reduction, precise positioning, process correction, and pipeline reinforcement have been proposed in engineering. In the currently commonly used construction techniques, measures such as adjusting the grouting bentonite slurry are adopted to reduce the pipe wall resistance during jacking; by measures such as densifying monitoring and surface grouting to reinforce the soil layer, the accuracy of the jacking direction of the pipe jacking is improved; the jacking jacks are used to apply different thrusts to different areas of the upper and lower parts of the pipe jacking to correct the deviated pipe jacking; epoxy resin concrete is used to repair the damaged pipeline, and channel steel supports are erected to reinforce the pipe wall. Although the currently adopted construction techniques in engineering have achieved good results in the soft upper and hard lower strata, no targeted relevant patent research and development results have been proposed in terms of preventive measures for pipeline damage.

[0004] The plain concrete on the inner side of the pipe wall is an important part of the pipe design to prevent sewage and running water from eroding the steel concrete during use. It directly affects the service life of the pipe and is an important quality control indicator. The reserved gap between the pipe sections is the key part of the steering and deviation control during the jacking construction and is a key means of quality control of the pipe jacking construction project. At present, in the process of on-site construction of the pipe jacking, in order to control the 10~30mm gap between the pipe sections of the pipe jacking, balance the force and protect the plain concrete layer on the inner side of the pipe wall, temporary lining plates made of wood, rubber and other materials are often installed in the gap during jacking, and are removed after jacking to facilitate construction in the pipe section. Combined with previous research and conventional construction conditions on site, the occurrence of pipeline damage is due to the influence of unbalanced stress on the one hand, and the plain concrete layer on the inner side of the pipe wall at the end of the pipe section is damaged by force; on the other hand, it is inconvenient to install and remove the temporary lining plate, which makes it difficult to ensure the quality of the temporary lining plate installation and cannot achieve practical results. During on-site construction, the full-section liner is installed. The liner is usually made of wood, rubber and other materials with a certain degree of elasticity to overcome the local slight unevenness. However, after jacking, the gap liner is very easy to increase friction due to slight deformation, and needs to be pulled out with force, which can easily damage the liner material. In some cases, it will also damage the pipe wall concrete that has already deteriorated after being stressed.

[0005] In summary, in view of the current problems that the concrete on the inner side of the pipe segment end is easily damaged and the temporary liner plate is difficult to install when large-diameter jacking pipes are jacked in soft upper and hard lower strata, it is urgent to design a pipe segment reinforcement jacking construction process that is convenient to construct, economical and practical, so as to solve the above problems efficiently, with high quality and safety. Summary of the invention

[0006] The main purpose of the present invention is to provide a construction method for reinforcing and jacking a pipe section in a soft upper and hard lower stratum, so as to solve the problems in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: comprising a prefabricated pipe section, a spigot steel ring and a socket steel ring are pre-buried at both ends of the pipe section, two adjacent pipe sections are connected end to end, the spigot steel ring is sealed against the socket steel ring, and a pressure-bearing steel ring is fixed on the inner side of the end of the spigot steel ring;

[0008] An inner joint gap is formed between two adjacent pipe sections, and a deformation ring is arranged in the inner joint gap. The deformation ring is formed by splicing a plurality of arc rings to form a complete ring;

[0009] The socket plate and the socket plate in the arc ring slide relative to each other. A plurality of socket grooves are arranged on one side of the socket plate. A sliding block is arranged in the socket groove. The sliding block is fixed on the socket plate. A threaded shaft connected by a thread is arranged on one side of the socket groove. The end of the threaded shaft rests on the sliding block.

[0010] In a preferred embodiment, a steel cylinder is provided inside the pipe section. An outer layer of concrete is provided on the outer side of the steel cylinder, and an inner layer of concrete is provided on the inner side. Socket steel rings and spigot steel rings are provided at both ends of the steel cylinder. Embedded steel rings are provided at both ends of the outer layer of concrete. A plurality of prestressed steel wires are provided on the outer side of the outer layer of concrete. Grouting holes are provided on the socket steel rings and the inner layer of concrete.

[0011] In a preferred embodiment, a sealing ring is provided between the socket steel ring and the spigot steel ring. Embedded anchors are provided at the ends of the outer layer of concrete.

[0012] In a preferred embodiment, rubber thin plates are provided on the outer sides of the socket plate and the spigot plate.

[0013] In a preferred embodiment, a plurality of threaded shafts are provided on one side of the socket plate. The threaded shafts correspond to socket grooves on the spigot plate. The sliding blocks are threadedly connected to the threaded shafts.

[0014] The depth of the socket groove is greater than the length of the sliding block.

[0015] In a preferred embodiment, a lock hole is provided on one side of the socket groove. The threaded shaft is threadedly connected to the lock hole. A ball head is fixedly provided at the end of the threaded shaft. The ball head abuts and slides inside the lock hole, and the ball head abuts against the sliding block.

[0016] In a preferred embodiment, the ball head at the end of the threaded shaft protrudes from the inner side of the socket groove, and the protruding depth is 1 / 2 to 1 / 3 of the diameter of the ball head.

[0017] In a preferred embodiment, an arc groove is provided on the outer side of the sliding block. The ball head abuts inside the arc groove, thereby fixing the sliding block.

[0018] In a preferred embodiment, installation and removal rings are fixedly provided on the inner sides of both ends of the spigot plate for gripping during manual installation.

[0019] The method is as follows: S1. Technical preparation: When prefabricating the pipe section, the bearing steel rings are arranged at a certain interval along the circumferential direction of the socket steel ring by spot welding, and then after the concrete is poured and formed, it is transported to the construction site after passing the inspection of the circular arrangement distance by a steel bar scanner.

[0020] S2. Site preparation: By conventional calculations in the early stage, different jacking forces for the soft upper and hard lower strata are obtained. Combining numerical simulation or numerical calculation, the stress distribution laws in different intervals of the full section are obtained. According to the laws, the installation quantity of the sliding blocks in each interval is determined, and after connecting the sliding blocks to the socket plate, they are inserted into the socket grooves, and after tightening the locking bolts, the preparation for the installation of the deformation ring is completed.

[0021] S3. Installing the deformation ring: The construction is carried out inside the pipe jacking pipe section. The deformation ring is manually held and stuffed into the inner joint gap of the pipe section. When the stuffing is insufficient, a roller can be used to push the deformation ring along the ring to the inner joint gap.

[0022] S4. After the jacking is completed, remove the deformation ring. Use an electric screwdriver held by hand to gradually loosen the locking bolts of the deformation ring in the order of first the top, then both sides, and finally the bottom, and then remove it. When removing the top deformation ring of a large-diameter pipe jacking, construction measures such as building ladders should be used to prevent the top deformation ring from falling after it is loosened.

[0023] S4. Dynamically adjust and optimize. After the initial jacking, collect measurement data, jacking force data, and pipe joint appearance data. Based on the stress characteristics of the upper-soft and lower-hard formation, combined with numerical calculation and analysis, judge the stress state of the entire cross-section during pipe jacking. When jacking again, adjust the levels of the sliding blocks and arc grooves in different azimuths of the cross-section according to the judgment, and complete the jacking construction according to the above S2, S3, and S4.

[0024] S5. Pipe jacking deviation correction. When on-site measurement finds that the pipe jacking is deviated or there is a tendency of deviation, according to the measurement data, install sliding blocks at the opposite azimuth of the deviation with a small reserved deformation amount, and cooperate with the jacking force of the jack to initially jack the pipe back to the opposite direction of the deviation to complete the jacking deviation correction.

[0025] The present invention provides a construction method for pipe joint reinforcement and jacking in an upper-soft and lower-hard formation. The design of the pressure-bearing steel ring is used to specifically reinforce the inner wall damaged area at the jacking end of the pipe joint during construction, which not only reduces the material consumption of the overall reinforcement of the pipe joint, but also avoids the damage of the concrete on the inner wall of the pipe joint. The design of the deformation ring is used as the lining plate for the pipe joint gap during jacking. While retaining the flexible contact ability of conventional materials such as wood and rubber, the installation and removal difficulty of the lining plate is reduced by loosening and tightening the locking bolts, and the quality problems of difficult installation and removal and easy secondary damage to the pipe wall after the traditional flexible contact is deformed by uneven stress in the upper-soft and lower-hard formation are avoided. At the same time, by designing the socket plate to connect the sliding blocks at different longitudinal positions of the arc grooves, the process posture of each pipe joint during jacking can be finely adjusted, reducing the risk of deviation during jacking in the upper-soft and lower-hard formation, and also adjusting and correcting the pipe joint posture after deviation to achieve pipe jacking correction. Brief Description of the Drawings

[0026] The following further describes the present invention in conjunction with the drawings and embodiments:

[0027] Figure 1 is a side view schematic diagram of a conventional pipe jacking pipe joint;

[0028] Figure 2 is a front view schematic diagram of a conventional pipe jacking pipe joint;

[0029] Figure 3 is a schematic diagram of the connection port of a conventional pipe joint;

[0030] Figure 4 is a partial schematic diagram of the layout of the pressure-bearing steel ring of the present invention;

[0031] Figure 5 is an overall schematic diagram of the layout of the pressure-bearing steel ring of the present invention;

[0032] Figure 6 is the axonometric view of the deformation ring of the present invention;

[0033] Figure 7 is the exploded view of the deformation ring of the present invention;

[0034] Figure 8 is the partial front sectional view of the deformation ring of the present invention;

[0035] Figure 9 is the exploded view of the circular arc ring of the deformation ring of the present invention;

[0036] Figure 10 is the schematic diagram of the locking state of the deformation ring of the present invention;

[0037] Figure 11 is the schematic diagram of the relaxed state of the deformation ring of the present invention;

[0038] In the figure: pipe section 1; socket steel ring 2; embedded steel ring 3; prestressed steel wire 4; inner layer concrete 5; outer layer concrete 6; spigot steel ring 7; steel cylinder 8; grouting hole 9; embedded anchor 10; inner joint gap 11; sealing ring 12; joint pressure test hole 13; damaged area 14; bearing steel ring 15; spigot plate 16; socket plate 17; locking bolt 18; rubber thin plate 19; spigot groove 20; threaded shaft 21; sliding block 22; arc groove 23; lock hole 24. Specific implementation mode

[0039] Example 1

[0040] As Figures 1 to 3 shown, it is the pipe section 1 commonly used in construction. In the conventional process during the jacking construction, materials such as wood and rubber are often used as lining pads in the inner joint gap 11 to transfer the jacking thrust between the pipe sections 1. When constructing in the soft upper and hard lower strata, the pipe section 1 is extremely prone to cracking and chipping in the damaged area 14 under the influence of uneven stress and construction factors.

[0041] As Figures 4 to 5 shown, it is the schematic layout diagram of the designed bearing steel ring 15. The bearing steel ring 15 is a circular ring made of steel material with an outer diameter slightly smaller than the thickness of the inner layer concrete 5. During the production of the pipe section 1, the bearing steel ring 15 is fixed to the inner side of the socket steel ring 2 at a certain interval along the circumferential direction of the pipe section 1 by spot welding, and then the concrete is poured to form.

[0042] Aiming at the problem of damage to the pipe section 1 caused by uneven stress on the bearing steel ring 15 and the inner layer concrete 5 and uneven deformation of different materials during the jacking process in the soft upper and hard lower strata, a steel component is added between the inner joint gap 11 and the joint pressure test hole 13 to reinforce the inner layer concrete 5 to reduce the stress deformation. The circular ring structure used not only saves materials and is beneficial to construction, but also increases the overall stress area.

[0043] As shown Figures 6 to 9 in the figure, the structure of the deformation ring mainly includes a socket plate 16, a spigot plate 17, a locking bolt 18, a thin rubber sheet 19 and a sliding block 22. The thin rubber sheet 19 on the outer walls of the socket plate 16 and the spigot plate 17 is used to eliminate the tiny uneven deformation between the deformation ring and the contact surface during jacking; the sliding block 22 is threadedly connected to the threaded shaft 21 of the spigot plate 17, and the sliding block 22 is inserted into the socket groove 20 of the socket plate 16 to limit the displacement; the locking bolt 18 on one side of the socket groove 20 is threadedly connected to the lock hole 24, and the depth of the socket groove 20 is greater than the length of the sliding block 22. By loosening and tightening the locking bolt 18, the radial slip of the sliding block 22 can be restricted, so as to lock and unlock the radial displacement of the deformation ring.

[0044] The thin rubber sheet 19 is used to retain the contact characteristics between wood, rubber lining plate and concrete surface in the traditional design. Through the locking system composed of the locking bolt 18, the sliding block 22 and the socket plate 16, the deformation ring restricts the radial displacement during the jacking of the jacking pipe 1, and retains the functions of bearing pressure and transmitting stress; after the jacking, after the radial displacement restriction of the deformation ring is released and relaxed, it can be easily pulled out by the installation and removal ring without causing secondary damage to the jacking pipe, which has the obvious advantage of convenient installation and removal. For the convenience of construction, the deformation ring is divided into four partial arc rings at a certain angle and becomes a closed ring after being installed on the pipe joint 1.

[0045] The top of the socket plate 16 is provided with a lock hole 24. A locking bolt 18 with a ball head at the top is installed in the hole. The inner wall of the hole is longitudinally divided into a sliding area with a smooth hole wall and a threaded area. The sliding wall area is used for the longitudinal sliding of the ball head of the locking bolt 18, and the threaded area is used for tightening and loosening the locking bolt 18. Through the lock hole 24 and the locking bolt 18, it is convenient for the operator to control the pushing out and retracting of the ball head at the bottom of the locking bolt 18 from the socket groove 20 by tightening and loosening the bolt.

[0046] The locking bolt 18 is a bolt structure with a spherical bottom. The ball head at the bottom of the locking bolt 18 is the key part for embedding and sliding the sliding block 22 and the socket plate 16. By designing and controlling the thickness of the ball head exposed from the socket groove 20, the center of the ball of the ball head is located inside the socket plate 16, and the stress after the ball head is stressed is decomposed and transferred along the direction of the center of the ball, so as to avoid shear failure of the ball head when stress concentration occurs. In the design of the present invention, the thickness of the ball head at the bottom of the locking bolt 18 exposed from the socket groove 20 is 1 / 2 - 1 / 3 of the diameter of the ball head.

[0047] The sliding block 22 and the socket plate 17 can be connected into a whole by means of a bolt structure. The socket plate 17 can be configured with multiple sliding blocks 22 corresponding to be inserted into the socket groove 20. The combined design enables the deformation ring, during use, to adjust the number of sliding blocks 22 at each part of the cross-section according to different working conditions and formation backgrounds, optimize the overall pressure-bearing capacity of the structure, and leave a part of the socket groove 20 empty to reduce the weight of the deformation ring, which is beneficial to construction. The outer wall of the sliding block 22 described in the present invention is provided with an arc groove 23, and the arc groove 23 can be closely fitted with the steel balls of the locking bolt 18, which is the key locking structure of the deformation ring structure.

[0048] Meanwhile, sliding blocks 22 with arc grooves 23 at different distances from the bottom are designed and marked for grading, forming a multi-level arc groove 23 locking system. When the pipe jacking deviates, different levels of sliding blocks 22 can be installed in the opposite direction of the deviation, leaving a certain small deformation amount in the opposite direction of the deviation, and cooperating with the adjustment of the jack thrust to help the pipe jacking return to the designed process.

[0049] As Figures 10 to 11 shown in the schematic diagrams of the locked state during the jacking of the deformation ring and the relaxed state when taken out, by tightening the locking bolt 18, the steel balls are pushed into the socket groove 20 and then embedded into the arc groove 23 of the sliding block 22. At this time, the deformation ring is locked into a stable pressure-bearing structure and installed at the joint gap of the pipe jacking pipe section 1 to transfer the jacking stress; by loosening the locking bolt 18, it is pulled out into the lock hole 24. Here, the deformation ring unlocks and the sliding block 22 displaces along the inside of the socket groove 20. After the deformation ring structure is relaxed, it disengages from the pipe section and can be manually taken out by the externally provided ring removal device.

[0050] The working principle of the present invention is as follows: When the pipe section 1 is fabricated, pressure-bearing steel rings 15 are arranged at certain intervals along the circumference of the socket steel ring 2 to preliminarily reinforce the easily damaged area 14 during the construction period of the pipe section. During construction, a deformation ring composed of a socket plate 16, a rubber thin plate 19, a locking bolt 18, a sliding block 22, and a socket plate 17 is designed to replace the commonly used backing plate. The advantages of the past process are retained by the rubber thin plate 19, and the locking and relaxation system formed by the locking bolt 18 and the sliding block 22 solves the problems of difficult removal and secondary damage to the pipe wall after deformation under uneven forces in the upper soft and lower hard formation of the traditional backing plate. At the same time, by installing sliding blocks 22 with different levels of arc grooves 23 at different parts of the whole cross-section and leaving a certain deformation amount of the joint gap inside the pipe section in the local area, it can not only reduce the unbalanced stress generated during jacking under different formation conditions, but also cooperate with the adjusted jack thrust during the jacking process to achieve deviation correction. The present invention first conducts targeted reinforcement on the pipe section 1 by installing pressure-bearing steel rings 15, then designs and adopts the deformation ring construction method to reduce the uneven stress during the jacking of the pipe section 1 and eliminate the installation and removal problems of the conventional backing plate, and finally cooperates with the jacking jack to complete the deviation correction adjustment, which has obvious advantages of convenience, economy, practicality, and high efficiency.

[0051] Example 2

[0052] As Figures 1 to 3 shown, in combination with Embodiment 1, it is further described as follows: The method is: technical preparation. When prefabricating the pipe section 1, the pressure-bearing steel rings 15 are arranged at certain intervals along the circumferential direction of the socket steel ring 2 by spot welding, and then after the concrete is poured and formed, it is transported to the construction site after passing the inspection of the circular layout distance by a steel bar scanner; site preparation. Different jacking forces for the soft upper and hard lower strata are obtained through previous conventional calculations, and the stress distribution laws in different intervals of the full section are obtained by combining numerical simulation or numerical calculation. The installation quantity of the sliding blocks 22 in each interval is determined according to the laws, and after connecting the sliding blocks 22 with the socket plate 17, they are inserted into the socket groove 20, and after tightening the locking bolts 18, the preparation for the installation of the deformation ring is completed; installing the deformation ring. The construction is located inside the jacking pipe section 1, and the deformation ring is manually stuffed into the inner joint gap 11 of the pipe section 1. When the stuffing is insufficient, a roller can be used to push the deformation ring along the ring to the inner joint gap 11; after the jacking is completed, the deformation ring is taken out. The locking bolts 18 of the deformation ring are gradually loosened in the order of first the top, then both sides, and finally the bottom by manually holding an electric screwdriver and taken out. When taking out the top deformation ring of a large-diameter jacking pipe, construction measures such as a building ladder should be used to prevent the top deformation ring from falling after being loosened; dynamic adjustment and optimization. After the initial jacking, the measurement data, jacking force data, and pipe section appearance data are collected. Based on the stress characteristics of the soft upper and hard lower strata and combined with numerical calculation analysis, the stress state of the full section during the jacking of the jacking pipe is judged. When jacking again, the levels of the sliding blocks 22 and the arc grooves 23 in different azimuths of the section are adjusted according to the judgment, and the jacking construction is completed according to the above S2, S3, and S4; jacking pipe deviation correction. When it is found through on-site measurement that the jacking pipe is deviated or there is a tendency of deviation, according to the measurement data, the sliding blocks 22 are installed in the opposite azimuth of the deviation with a small reserved deformation amount, and the jacking pipe is initially jacked back in the opposite direction of the deviation in cooperation with the jacking force of the jack to complete the jacking deviation correction.

[0053] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A construction method for reinforced jacking of pipe segments in a soft upper and hard lower stratum, characterized in that: It includes prefabricated pipe segments (1). Socket steel rings (2) and spigot steel rings (7) are embedded at both ends of the pipe segment (1). Two adjacent pipe segments (1) are connected end to end. The socket steel ring (2) is hermetically abutted inside the spigot steel ring (7). A pressure-bearing steel ring (15) is fixedly arranged on the inner side of the end of the socket steel ring (2). An internal joint gap (11) is formed between two adjacent pipe segments (1). A deformation ring is arranged in the internal joint gap (11). The deformation ring is formed by splicing a plurality of arc rings into a complete ring. The socket plate (17) and the spigot plate (16) in the arc ring slide relative to each other. A plurality of spigot grooves (20) are arranged on one side of the spigot plate (16). A sliding block (22) that slides is arranged in the spigot groove (20). The sliding block (22) is fixed on the socket plate (17). A threaded shaft (21) connected by thread is arranged on one side of the spigot groove (20). The end of the threaded shaft (21) abuts against the sliding block (22). A lock hole (24) is arranged on one side of the spigot groove (20). A locking bolt (18) is threadedly connected to the lock hole (24). A ball head is fixedly arranged at the end of the locking bolt (18). The ball head abuts and slides in the lock hole (24). The ball head abuts against the sliding block (22). An arc groove (23) is arranged on the outer side of the sliding block (22). The ball head abuts in the arc groove (23), thereby fixing the sliding block (22). The method is as follows: S1. Technical preparation. When prefabricating the pipe segment (1), the pressure-bearing steel rings (15) are arranged at certain intervals along the circumferential direction of the socket steel ring (2) by spot welding. Then, after the concrete is poured and formed, it is transported to the construction site after passing the inspection of the circular ring spacing by a steel bar scanner. S2. Site preparation. By means of conventional calculations in the early stage, different jacking forces in the upper soft and lower hard strata are obtained. In cooperation with numerical simulation or numerical calculation, the stress distribution law in different intervals of the full section is obtained. According to the law, the installation quantity of the sliding blocks (22) in each interval is determined. After connecting the sliding blocks (22) with the socket plate (17), they are inserted into the spigot grooves (20). After tightening the locking bolts (18), the preparation for installing the deformation ring is completed. S3. Installing the deformation ring. The construction is carried out inside the jacking pipe segment (1). The deformation ring is manually held and stuffed into the internal joint gap (11) of the pipe segment (1). When the stuffing is insufficient, a roller can be used to push the deformation ring along the ring to the internal joint gap (11). S4. Removing the deformation ring after the jacking is completed. The locking bolts (18) of the deformation ring are gradually loosened in the order of first the top, then both sides, and finally the bottom by manually holding an electric screwdriver and then removed. When removing the top deformation ring of a large-diameter jacking pipe, construction measures such as a building ladder should be used to prevent the top deformation ring from falling after loosening. S5. Dynamic adjustment and optimization. After the initial jacking, the measurement data, jacking force data, and pipe segment appearance data are collected. According to the stress characteristics of the upper soft and lower hard strata and combined with numerical calculation analysis, the stress state of the full section during the jacking of the jacking pipe is judged. When jacking again, the levels of the sliding blocks (22) and the arc grooves (23) in different orientations of the section are adjusted according to the judgment. The jacking construction is completed according to the above S2, S3, and S4. S6, jacking correction: when the on-site measurement finds that the jacking pipe is deviated or has a tendency to deviate, a sliding block (22) is installed in the opposite direction of the deviation according to the measurement data to reserve a small deformation amount, and the jacking pipe is initially deviated in the opposite direction of the deviation with the help of the jacking force to complete the jacking correction.

2. The construction method for the jacking of a pipe joint with reinforcement for pipe jacking in a soft upper and hard lower stratum according to claim 1, characterized in that: A steel cylinder (8) is provided inside the pipe joint (1), an outer layer of concrete (6) is provided on the outside of the steel cylinder (8), an inner layer of concrete (5) is provided on the inside, a socket steel ring (2) and a socket steel ring (7) are provided at both ends of the steel cylinder (8), embedded steel rings (3) are provided at both ends of the outer layer of concrete (6), a plurality of prestressed steel wires (4) are provided on the outside of the outer layer of concrete (6), and grouting holes (9) are provided on the socket steel ring (2) and the inner layer of concrete (5).

3. The construction method for jacking the reinforced pipe joint of the pipe jacking in the soft upper and hard lower formation according to claim 2, characterized in that: A sealing ring (12) is provided between the insert steel ring (2) and the socket steel ring (7), and a pre-buried anchor (10) is provided at the end of the outer layer concrete (6).

4. The construction method for jacking and reinforcing the pipe joints of a pipe jacking in a soft upper and hard lower formation according to claim 1, characterized in that: Rubber sheets (19) are provided on the outer sides of the socket plate (17) and the socket plate (16).

5. The construction method for jacking and reinforcing a pipe joint in a soft upper and hard lower stratum according to claim 1, characterized in that: A plurality of threaded shafts (21) are provided on one side of the socket plate (17), the threaded shafts (21) correspond to the socket grooves (20) on the socket plate (16), and the sliding blocks (22) are threadedly connected to the threaded shafts (21); The depth of the socket groove (20) is greater than the length of the sliding block (22).

6. The construction method for the jacking of a pipe joint with reinforcement for a pipe jacking in a soft upper and hard lower stratum according to claim 1, characterized in that: The ball head at the end of the threaded shaft (21) is exposed from the inner side of the socket groove (20), and the exposed depth is 1 / 2 to 1 / 3 of the diameter of the ball head.

7. The construction method for reinforced jacking of the pipe joint in the soft upper and hard lower stratum according to claim 1, characterized in that: The inner sides of both ends of the socket plate (16) are fixed with mounting rings for holding during manual installation.

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