A buoyancy pipe-through construction method

Abstract

The application discloses a kind of buoyancy pipe penetrating construction method, the method by using water source as the medium between outer sleeve and inner penetrating pipe, ensure the smooth of construction process, and in the both ends of the outer sleeve, respectively set up hole inlet water stop device and hole outlet water stop device, as the sealing system of water source.In addition, in the hole inlet position, outer sleeve inner wall and the end of inner penetrating pipe, respectively install limiting device, limiting roller and anti-collision roller.Finally through the action of buoyancy, make inner penetrating pipe advance to the inside of outer sleeve smoothly.The application effectively solves the problems of insufficient structural strength, poor durability and easy damage to the outer anti-corrosion layer of the pipeline in traditional roller launching method, pipeline outer wall installation caster method and pulley block propulsion method, especially suitable for large-diameter, long-distance and high-quality protection requirements of inner penetrating pipe construction, with good economy and implementation effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of trenchless construction, and particularly relates to a floating force pipe-penetration construction method. BACKGROUND

[0002] At present, trenchless pipe-penetration technology has been widely applied in municipal pipeline engineering and other fields. However, in the pipeline laying process, some areas with complex geological conditions are often encountered, especially when the pipeline needs to cross rivers, roads and railways, the safety requirement of the pipeline operation is higher. In recent years, the application of internal pipe-penetration in pipeline construction is more and more common, which is an important means to solve the problem of pipeline crossing important buildings.

[0003] At present, in the existing internal pipe-penetration engineering cases at home and abroad, the traditional roller launching method, the method of installing casters on the outer wall of the pipeline, the pulley set propulsion method and other technologies are generally used. These methods are mainly suitable for pipelines with small diameter, short internal penetration distance and low requirement for finished product protection. However, in the internal pipe-penetration construction involving large diameter, long distance and high requirement for pipeline anticorrosion finished product protection, these traditional methods often encounter problems such as insufficient strength of support structure, poor durability and the like, and are easy to cause damage to the anticorrosion layer of the outer layer of the pipeline. Therefore, it is necessary to propose a new pipe-penetration construction method to solve the above problems.

[0004] It can be understood that the above statements only provide background technology related to the present application, and do not necessarily constitute prior art. SUMMARY

[0005] The purpose of the present application is to provide a floating force pipe-penetration construction method to overcome the problems of insufficient strength of support structure, poor durability and the like in the traditional pipe-penetration construction method.

[0006] In order to achieve the above object, the application provides a floating force pipe penetrating construction method, which penetrates an inner penetrating pipe into an outer sleeve pipe by using floating force, and specifically comprises the following steps: S1, installing a hole inlet water stop device and a hole inlet limiting device at one side end of the outer sleeve pipe as a hole inlet, and installing a hole outlet water stop device and a hole outlet water stop wall at the other side end of the outer sleeve pipe as a hole outlet; S2, uniformly and intervally arranging precast concrete pads at the bottom of the cavity inside the outer sleeve pipe along the axial direction, and installing limiting rollers on the inner wall of the outer sleeve pipe; S3, pushing the end of the first section of the inner penetrating pipe into the hole inlet water stop device by a power system for a first set distance, then making a water stop wall at the end of the inner penetrating pipe, and installing an anti-collision roller at the end of the inner penetrating pipe; S4, injecting water between the outer sleeve pipe and the inner penetrating pipe, and when the water level reaches a predetermined water level, the inner penetrating pipe continues to be normally connected and pushed forward; S5, when the inner penetrating pipe is pushed to a second set distance before the hole outlet water stop device, the pushing is paused, and after the anti-collision roller at the end of the inner penetrating pipe is removed, the pushing is continued; S6, after the inner penetrating pipe is pushed out of the hole outlet water stop device, the pushing is paused, the water source between the hole outlet water stop device and the hole outlet water stop wall is drained, and the hole outlet water stop wall is removed; S7, the pushing is continued, and the inner penetrating pipe is pushed out of the hole outlet of the outer sleeve pipe, and the pushing of the inner penetrating pipe is completed; S8, the water source between the inner penetrating pipe and the outer sleeve pipe is drained, and the inner penetrating pipe is vertically dropped onto the precast concrete pads; S9, the water stop wall at the end of the inner penetrating pipe is removed, and the floating force pipe penetrating construction is completed.

[0007] Preferably, the hole inlet water stop device comprises a hole inlet flange, a hole inlet rubber water stop fabric, a hole inlet water stop baffle and a plurality of hole inlet connecting pieces.

[0008] Preferably, the hole inlet flange is annular in structure and T-shaped in cross section, the T-shaped longitudinal beam is installed on the inner wall of the hole inlet of the outer sleeve pipe, and the T-shaped cross beam is connected with the hole inlet water stop baffle through the plurality of hole inlet connecting pieces; the hole inlet rubber water stop fabric is located in the middle part of the hole inlet flange and the hole inlet water stop baffle, and is clamped and fixed by the hole inlet flange and the hole inlet water stop baffle.

[0009] Preferably, the outer wall of the hole inlet of the outer sleeve pipe is annularly installed with a sleeve pipe hole inlet flange, and the outer side of the sleeve pipe hole inlet flange is welded with the hole inlet limiting device.

[0010] Preferably, the hole inlet limiting device is respectively arranged above the hole inlet of the outer sleeve pipe and on the corresponding two sides in the horizontal direction.

[0011] The hole entry limiting device comprises a first L-shaped limiting device, a first nylon roller and a first connecting member, and the first nylon roller is arranged towards the outer wall of the inner pipe.

[0012] Preferably, a guide rail is arranged outside the outer sleeve pipe hole entry to support the inner pipe.

[0013] Preferably, the hole exit water stop wall is located at the hole exit position of the outer sleeve pipe, and is built up from the bottom of the inner wall of the hole exit pipe wall upwards, and has a horizontal height higher than the predetermined water level line; the inner pipe end head water stop wall is arranged at the end head of the first section of the inner pipe, and is built up from the bottom of the inner wall of the end head of the inner pipe upwards, and has a horizontal height higher than the predetermined water level line.

[0014] Preferably, the hole exit water stop device comprises a hole exit flange, a hole exit rubber water stop cloth, a hole exit water stop baffle and a plurality of hole exit connecting members.

[0015] The hole exit flange is annular in structure, is located at the inner side of the hole exit water stop wall, has an L-shaped cross section, the L-shaped longitudinal beam is installed on the inner wall of the hole exit of the outer sleeve pipe, the L-shaped transverse beam is connected with the hole exit water stop baffle through the plurality of hole exit connecting members, and the hole exit rubber water stop cloth is located at the intermediate portion of the hole exit flange and the hole exit water stop baffle and is clamped and fixed through the hole exit flange and the hole exit water stop baffle.

[0016] Preferably, the limiting roller is installed on the inner wall of the outer sleeve pipe, each limiting roller comprises a second H-shaped steel, a support plate, a fastener, a second nylon roller and a second connecting member, and the second nylon roller is arranged towards the outer wall of the inner pipe.

[0017] The second nylon roller is connected to the upper portion of the second H-shaped steel through the second connecting member, the lower portion of the second H-shaped steel is connected with the support plate through welding, and the support plate is provided with a fixing hole, and the support plate can be fixed on the inner wall of the outer sleeve pipe through the fastener.

[0018] Preferably, the inner pipe end head anti-collision roller comprises a third H-shaped steel, a third nylon roller and a third connecting member, and the third nylon roller is arranged towards the inner wall of the outer sleeve pipe.

[0019] The third nylon roller is connected to the upper portion of the third H-shaped steel through the third connecting member, and the lower portion of the third H-shaped steel is connected with the outer wall of the end head of the inner pipe through welding.

[0020] Preferably, the limiting rollers are symmetrically installed below the horizontal center line of the outer sleeve at a certain angle with the horizontal center line of the outer sleeve; and the anti-collision rollers of the inner pipe end are installed above the horizontal center line of the inner pipe at a certain angle with the horizontal center line of the inner pipe.

[0021] Compared with the prior art, the floating pipe penetrating construction method provided by the application has at least the following beneficial effects:

[0022] (1) The water source is used as the carrier between the outer sleeve and the inner pipe, which greatly increases the carrying capacity and damage resistance of the carrier between the sleeves, reduces the friction of the inner pipe during pushing, improves the construction efficiency, and shortens the overall construction period.

[0023] (2) The hole inlet water stop device and the hole outlet water stop device are respectively arranged at the two ends of the outer sleeve, and rubber water stop cloth is used to close the water source, which has good airtightness and can effectively prevent water leakage.

[0024] (3) The application effectively solves the problems of insufficient structural strength, poor durability and damage to the outer anticorrosive layer of the pipe in the traditional roller launching method, the pipe outer wall mounted roller method and the pulley set pushing method, and is especially suitable for large-diameter, long-distance and high-quality protection of the inner pipe construction, and has good economic efficiency and implementation effect. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The floating pipe penetrating process flow chart provided by an embodiment of the application;

[0026] Figure 2 The floating pipe penetrating longitudinal section schematic diagram provided by an embodiment of the application;

[0027] Figure 3 The floating pipe penetrating hole inlet section schematic diagram provided by an embodiment of the application;

[0028] Figure 4 The floating pipe penetrating hole outlet section schematic diagram provided by an embodiment of the application;

[0029] Figure 5 The floating pipe penetrating hole outlet section schematic diagram provided by an embodiment of the application;

[0030] Figure 6 The floating pipe penetrating hole inlet water stop device schematic diagram provided by an embodiment of the application;

[0031] Figure 7 The floating pipe penetrating hole outlet water stop device schematic diagram provided by an embodiment of the application;

[0032] Figure 8(a) is a front view of the floating force pipe penetrating hole entry limiting roller according to an embodiment of the present application; Figure 8(b) is a side view of the floating force pipe penetrating hole entry limiting roller according to an embodiment of the present application;

[0033] Figure 9(a) is a front view of the floating force pipe penetrating outer sleeve end head anti-collision roller according to an embodiment of the present application; Figure 9(b) is a side view of the floating force pipe penetrating outer sleeve end head anti-collision roller according to an embodiment of the present application;

[0034] Figure 10(a) is a top view of the floating force pipe penetrating inner limiting roller according to an embodiment of the present application; Figure 10(b) is a front view of the floating force pipe penetrating inner limiting roller according to an embodiment of the present application; Figure 10(c) is a side view of the floating force pipe penetrating inner limiting roller according to an embodiment of the present application;

[0035] Figure 11 Figure 11 is a floating force pipe penetrating floating force calculation reference diagram according to an embodiment of the present application.

[0036] Reference signs:

[0037] Inner penetrating pipe 1

[0038] Outer sleeve 2

[0039] Outer sleeve hole flange 3

[0040] Hole entry water stop device 4

[0041] Hole entry limiting device 5

[0042] Hole exit water stop device 6

[0043] Inner penetrating pipe end head water stop wall 7

[0044] Hole exit water stop wall 8

[0045] Prefabricated concrete cushion block 10

[0046] Predetermined water level line 11

[0047] Limiting roller 12

[0048] Inner penetrating pipe end head anti-collision roller 13

[0049] Hole entry flange 14

[0050] Hole entry rubber water stop curtain cloth 15

[0051] Hole entry water stop baffle 16

[0052] Hole entry connecting piece 17

[0053] Hole exit flange 18

[0054] Hole exit rubber water stop curtain cloth 19

[0055] Exit hole water stop baffle 20

[0056] Exit hole connector 21

[0057] First H-shaped steel 22

[0058] First nylon roller 23

[0059] First connector 24

[0060] Second H-shaped steel 25

[0061] Support plate 26

[0062] Second nylon roller 27

[0063] Second connector 28

[0064] Fastener 29

[0065] Third H-shaped steel 30

[0066] Third nylon roller 31

[0067] Third connector 32

[0068] Guide rail 33 DETAILED DESCRIPTION

[0069] The present application will be further described by a detailed description of a preferred embodiment thereof, with reference to the drawings. Figures 1-11 It is to be understood that the drawings are shown by way of illustration only and that they are not limiting the specific embodiments disclosed herein and that various modifications can be made without departing from the scope of the present application.

[0070] It is to be understood that the drawings are shown by way of illustration only and that they are not limiting the specific embodiments disclosed herein and that various modifications can be made without departing from the scope of the present application.

[0071] It is to be understood that the terms such as first and second, etc., are used herein solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0072] As Figure 1 , Figure 2 ,Figure 4 As shown, the present application provides a buoyancy pipe jacking construction method, which uses buoyancy to pass the inner pipe 1 through the middle part of the outer sleeve pipe 2, and specifically includes the following steps:

[0073] S1, install the hole entry water stop device 4 and the hole entry limiting device 5 at the one side end of the outer sleeve pipe 2 as the hole entry, and install the hole exit water stop device 6 and the hole exit water stop wall 8 at the other side end of the outer sleeve pipe 2 as the hole exit;

[0074] S2, uniformly and axially arrange the precast concrete cushion block 10 at the bottom of the cavity inside the outer sleeve pipe 2, and install the limiting roller 12 on the inner wall of the outer sleeve pipe 2 (as shown in Figure 4

[0075] S3, use the power system to push the end of the first section of the inner pipe 1 into the hole entry water stop device 4 by a first set distance, then make the inner pipe end water stop wall 7 at the end of the inner pipe 1, and install the inner pipe end anti-collision roller 13 at the end of the inner pipe 1; it should be noted that in this embodiment, the inner pipe 1 is composed of multiple pipe structures, rather than a very long continuous pipe, and the use of multiple relatively short pipes facilitates the jacking of the inner pipe 1, facilitating operation while improving efficiency; in this embodiment, the first set distance is preferably 0.5m;

[0076] S4, inject water between the outer sleeve pipe 2 and the inner pipe 1, and after reaching the predetermined water level line 11, the inner pipe 1 continues to be normally connected and advanced; it should be noted that the predetermined water level line 11 of the water injection needs to be calculated in advance according to the buoyancy of the inner pipe 1, and due to factors such as the advancement of the inner pipe 1, the leakage of the outer sleeve pipe 2, and the evaporation of water, the water level in the outer sleeve pipe 2 will change constantly, so pumping and drainage operations need to be performed in real time, and the water level needs to be monitored in real time to ensure that the water level is always at the predetermined water level line 11;

[0077] S5, when the inner pipe 1 advances to the second set distance before the hole exit water stop device 6, pause the advancement, remove the inner pipe end anti-collision roller 13, and continue to advance; in this embodiment, the second set distance is preferably 1m;

[0078] S6, after the inner pipe 1 is jacked out of the hole exit water stop device 6, pause the advancement, drain the water source between the hole exit water stop device 6 and the hole exit water stop wall 8, and remove the hole exit water stop wall 8;

[0079] S7, continue to advance the inner pipe 1 to the outside of the hole exit of the outer sleeve pipe 2, and complete the advancement of the inner pipe 1;

[0080] ​S8, empty the water source between the inner pipe 1 and the outer sleeve pipe 2, and make the inner pipe 1 vertically fall on the precast concrete cushion 10;

[0081] S9, remove the inner pipe end water stop wall 7, and complete the floating force pipe jacking construction.

[0082] In the embodiment, the outer sleeve pipe 2 is a reinforced concrete pipe jacking with an inner diameter of 4000 mm; the inner pipe 1 is a steel pipe with an outer diameter of 3600 mm and a wall thickness of 30 mm; before the floating force pipe jacking construction, the following preparation work needs to be carried out:

[0083] As shown in Figure 2 and Figure 4 , the hole entry water stop device 4 and the hole entry limiting device 5 need to be installed at the hole entry; the hole exit water stop device 6 and the hole exit water stop wall 8 need to be installed at the hole exit; the precast concrete cushion 10 is uniformly and interval arranged below the cavity inside the outer sleeve pipe 2, and the limiting roller 12 is installed on the corresponding two sides of the inner wall of the outer sleeve pipe 2.

[0084] Further, as shown in Figure 3 and Figure 6 , the hole entry water stop device 4 comprises a hole entry flange 14, a hole entry rubber water stop cloth 15, a hole entry water stop baffle 16 and a plurality of hole entry connecting pieces 17. The hole entry flange 14 is annular structure with T-shaped cross section, the T-shaped longitudinal beam of which is installed on the inner wall of the hole entry of the outer sleeve pipe 2, and the T-shaped transverse beam is connected with the hole entry water stop baffle 16 through a plurality of hole entry connecting pieces 17; the hole entry rubber water stop cloth 15 is located in the middle part of the hole entry flange 14 and the hole entry water stop baffle 16, and is clamped and fixed by the hole entry flange 14 and the hole entry water stop baffle 16. Among them, the hole entry water stop baffle 16 and the hole entry rubber water stop cloth 15 are annular structure, and a plurality of hole entry connecting pieces 17 are distributed around the hole entry flange 14 to fix the hole entry water stop baffle 16 on the hole entry flange 14. In addition, the length of the hole entry rubber water stop cloth 15 is greater than the length of the hole entry flange 14 and the hole entry water stop baffle 16 respectively, so as to ensure that the inner pipe 1 can tightly fit with the hole entry rubber water stop cloth 15 when jacking, and avoid water source leakage. In the embodiment, the hole entry connecting piece 17 adopts a bolt assembly, and the hole entry flange 14 is a pipe flange.

[0085] Further, as shown in Figure 3As shown in FIG. 8(a) and FIG. 8(b), the outer wall of the inlet of the outer sleeve 2 is annularly provided with an outer sleeve inlet flange 3, and the inlet limiting device 5 is welded to the outer side of the outer sleeve inlet flange 3. Specifically, three inlet limiting devices 5 are arranged, respectively arranged above the inlet of the outer sleeve and on the corresponding two sides in the horizontal direction, each of the inlet limiting devices 5 comprises a first L-shaped limiting device, a first nylon roller 23 and a first connecting piece 24, and the first nylon roller 23 is arranged towards the outer wall of the inner penetrating pipe 1. The first L-shaped limiting device is formed by vertical welding of two first H-shaped steels 22, then one of the first H-shaped steels 22 is cut to form a groove for mounting the first nylon roller 23, the first nylon roller 23 is connected to the first H-shaped steel 22 through the first connecting piece 24, and finally the other first H-shaped steel 22 is welded to the outer sleeve inlet flange 3, thereby obtaining the inlet limiting device 5. In this embodiment, the first connecting piece 24 is a bolt assembly, and the first nylon roller 23 is spaced apart from the outer wall of the inner penetrating pipe 1 by 20-30 mm, so as to prevent excessive friction between the first nylon roller 23 and the pipe wall during jacking of the inner penetrating pipe 1, effectively protect the outer wall of the inner penetrating pipe 1, prolong the service life of the inner penetrating pipe 1, and reduce the maintenance cost during construction.

[0086] Further, as shown in FIG. 8(a) and FIG. 8(b), the outer wall of the inlet of the outer sleeve 2 is annularly provided with an outer sleeve inlet flange 3, and the inlet limiting device 5 is welded to the outer side of the outer sleeve inlet flange 3. Specifically, three inlet limiting devices 5 are arranged, respectively arranged above the inlet of the outer sleeve and on the corresponding two sides in the horizontal direction, each of the inlet limiting devices 5 comprises a first L-shaped limiting device, a first nylon roller 23 and a first connecting piece 24, and the first nylon roller 23 is arranged towards the outer wall of the inner penetrating pipe 1. The first L-shaped limiting device is formed by vertical welding of two first H-shaped steels 22, then one of the first H-shaped steels 22 is cut to form a groove for mounting the first nylon roller 23, the first nylon roller 23 is connected to the first H-shaped steel 22 through the first connecting piece 24, and finally the other first H-shaped steel 22 is welded to the outer sleeve inlet flange 3, thereby obtaining the inlet limiting device 5. In this embodiment, the first connecting piece 24 is a bolt assembly, and the first nylon roller 23 is spaced apart from the outer wall of the inner penetrating pipe 1 by 20-30 mm, so as to prevent excessive friction between the first nylon roller 23 and the pipe wall during jacking of the inner penetrating pipe 1, effectively protect the outer wall of the inner penetrating pipe 1, prolong the service life of the inner penetrating pipe 1, and reduce the maintenance cost during construction. Figure 2 and Figure 3 Further, as shown in FIG. 8(a) and FIG. 8(b), the outer wall of the inlet of the outer sleeve 2 is annularly provided with an outer sleeve inlet flange 3, and the inlet limiting device 5 is welded to the outer side of the outer sleeve inlet flange 3. Specifically, three inlet limiting devices 5 are arranged, respectively arranged above the inlet of the outer sleeve and on the corresponding two sides in the horizontal direction, each of the inlet limiting devices 5 comprises a first L-shaped limiting device, a first nylon roller 23 and a first connecting piece 24, and the first nylon roller 23 is arranged towards the outer wall of the inner penetrating pipe 1. The first L-shaped limiting device is formed by vertical welding of two first H-shaped steels 22, then one of the first H-shaped steels 22 is cut to form a groove for mounting the first nylon roller 23, the first nylon roller 23 is connected to the first H-shaped steel 22 through the first connecting piece 24, and finally the other first H-shaped steel 22 is welded to the outer sleeve inlet flange 3, thereby obtaining the inlet limiting device 5. In this embodiment, the first connecting piece 24 is a bolt assembly, and the first nylon roller 23 is spaced apart from the outer wall of the inner penetrating pipe 1 by 20-30 mm, so as to prevent excessive friction between the first nylon roller 23 and the pipe wall during jacking of the inner penetrating pipe 1, effectively protect the outer wall of the inner penetrating pipe 1, prolong the service life of the inner penetrating pipe 1, and reduce the maintenance cost during construction.

[0087] It can be understood that the jacking principle of the inner penetrating pipe 1 of the present application is as follows: first, jacking the first section of the inner penetrating pipe 1 on the guide rail 33, after jacking the first section of the inner penetrating pipe 1, performing pipe connecting operation on the guide rail 33 to weld and connect the second section of the inner penetrating pipe with the first section of the inner penetrating pipe 1, then continuing jacking and welding the third section of the inner penetrating pipe, and so on, until the whole jacking process is completed.

[0088] In addition, through the inlet limiting device 5 combined with the guide rail 33 below which the inner penetrating pipe 1 is supported, good limiting and fixing effect can be achieved, so that the jacked inner penetrating pipe 1 will not be displaced due to water buoyancy during pipe connecting, and the pipe connecting construction efficiency is improved.

[0089] Further, as shown in FIG. 8(a) and FIG. 8(b), the outer wall of the inlet of the outer sleeve 2 is annularly provided with an outer sleeve inlet flange 3, and the inlet limiting device 5 is welded to the outer side of the outer sleeve inlet flange 3. Specifically, three inlet limiting devices 5 are arranged, respectively arranged above the inlet of the outer sleeve and on the corresponding two sides in the horizontal direction, each of the inlet limiting devices 5 comprises a first L-shaped limiting device, a first nylon roller 23 and a first connecting piece 24, and the first nylon roller 23 is arranged towards the outer wall of the inner penetrating pipe 1. The first L-shaped limiting device is formed by vertical welding of two first H-shaped steels 22, then one of the first H-shaped steels 22 is cut to form a groove for mounting the first nylon roller 23, the first nylon roller 23 is connected to the first H-shaped steel 22 through the first connecting piece 24, and finally the other first H-shaped steel 22 is welded to the outer sleeve inlet flange 3, thereby obtaining the inlet limiting device 5. In this embodiment, the first connecting piece 24 is a bolt assembly, and the first nylon roller 23 is spaced apart from the outer wall of the inner penetrating pipe 1 by 20-30 mm, so as to prevent excessive friction between the first nylon roller 23 and the pipe wall during jacking of the inner penetrating pipe 1, effectively protect the outer wall of the inner penetrating pipe 1, prolong the service life of the inner penetrating pipe 1, and reduce the maintenance cost during construction. Figure 2 and Figure 5As shown, the exit hole water stop wall 8 is located at the exit hole position of the outer sleeve 2, and is built up from the bottom of the inner wall of the exit hole pipe wall upwards, and has a height higher than the predetermined water level line 11. In this embodiment, the exit hole water stop wall 8 is built up by concrete solid bricks and MU10 cement mortar, has a wall thickness of 400 mm, a wall top height higher than the predetermined water level by 300 mm to 500 mm, and the wall body is cement mortar faced on both sides to avoid water leakage between the sleeves.

[0090] Further, as shown in Figure 2 , Figure 5 and 7 , the exit hole water stop device 6 is installed on the inner side of the exit hole water stop wall 8, and has a third set spacing from the inner wall of the exit hole water stop wall 8. In this embodiment, the third set spacing is set to 1 m.

[0091] Further, the exit hole water stop device 6 comprises an exit hole flange 18, an exit hole rubber water stop curtain 19, an exit hole water stop baffle 20 and a plurality of exit hole connecting pieces 21. The exit hole flange 18 is annular in structure, is located on the inner side of the exit hole water stop wall 8, has an L-shaped cross section, and has an L-shaped longitudinal beam installed on the inner wall of the exit hole of the outer sleeve 2 and an L-shaped transverse beam connected with the exit hole water stop baffle 20 through the plurality of exit hole connecting pieces 21. The exit hole rubber water stop curtain 19 is located in the middle part of the exit hole flange 18 and the exit hole water stop baffle 20, and is clamped and fixed by the exit hole flange 18 and the exit hole water stop baffle 20. The exit hole water stop baffle 20 and the exit hole rubber water stop curtain 19 are annular in structure, and the plurality of exit hole connecting pieces 21 are distributed around the exit hole flange 18 to fix the exit hole water stop baffle 20 on the exit hole flange 18. In addition, the lengths of the exit hole rubber water stop curtain 19 are greater than the lengths of the exit hole flange 18 and the exit hole water stop baffle 20 respectively to ensure that the inner pipe 1 can be closely attached to the exit hole rubber water stop curtain 19 when continuing to be pushed forward, and water leakage is avoided. In this embodiment, the exit hole connecting pieces 21 are bolt assemblies, and the exit hole flange 18 is a pipeline flange.

[0092] Further, as shown in Figure 2 and Figure 4 , the height of the prefabricated concrete pad 10 is the design gap height of the inner pipe 1 and the outer sleeve 2, and is designed as required, and the prefabricated concrete pads 10 are uniformly and interval arranged at the bottom of the cavity of the outer sleeve 2. In this embodiment, the prefabricated concrete pad 10 is prefabricated by C30 concrete, has a height of the design gap height of the inner pipe 1 and the outer sleeve 2, a width of 1 m, a length of 0.4 m, and one is arranged at an interval of 8 to 10 m.

[0093] Further, as Figure 4 , Figure 10(a) , 10(b) and shown in Fig. 10(c), the limiting roller 12 is made of a second H-shaped steel 25, a support plate 26, a fastener 29, a second nylon roller 27 and a second connecting member 28, and the second nylon roller 27 is arranged towards the outer wall of the inner pipe 1. Specifically, first, the upper rib plate of the second H-shaped steel 25 is cut to form a slot for mounting the second nylon roller 27, and the second nylon roller 27 is connected to the second H-shaped steel 25 through the second connecting member 28; second, the lower part of the second H-shaped steel 25 is welded to the support plate 26; and finally, holes are opened at the four corners of the support plate 26 for mounting the fastener 29, and the support plate 26 is fixed to the inner wall of the outer sleeve 2 through the fastener 29 to achieve the effect of limiting and fixing. In this embodiment, the fastener 29 is an expansion bolt, and the second connecting member 28 is a bolt assembly. In the present application, the limiting roller plays the role of fixing the pipe position, limiting the movement range of the pipe, and promoting the guidance, so that the present application can be applied to the construction of some inner pipes with large curvature radius.

[0094] Further, as Figure 4 , shown in Figs. 9(a) and 9(b), after the end of the first section inner pipe 1 is pushed into the hole entrance water stop device 4, the inner pipe end anti-collision roller 13 is installed. The inner pipe end anti-collision roller 13 is made of a third H-shaped steel 30, a third nylon roller 31 and a third connecting member 32, and the third nylon roller 31 is arranged towards the inner wall of the outer sleeve 2. Specifically, first, the upper rib plate of the third H-shaped steel 30 is cut to form a slot for mounting the third nylon roller 31, and the third nylon roller 31 is connected to the third H-shaped steel 30 through the third connecting member 32; then the lower part of the third H-shaped steel 30 is welded to the outer wall of the end of the inner pipe 1, thereby playing the role of anti-collision, avoiding the inner pipe 1 from being damaged by impact during jacking, and even damaging the outer anti-corrosion coating of the inner pipe 1.

[0095] Further, as Figure 4As shown in the embodiment, the limiting rollers 12 are arranged every 20-30 m, each group containing two rollers symmetrically installed below the horizontal center line of the outer sleeve 2 at an angle of 10° with the horizontal center line of the outer sleeve 2; the inner pipe end anti-collision rollers 13 are installed on the outer wall of the end of the inner pipe 1, containing two rollers symmetrically installed above the horizontal center line of the inner pipe 1 at an angle of 10° with the horizontal center line of the inner pipe 1. It can be understood that the limiting rollers 12 and the inner pipe end anti-collision rollers 13 are staggered. In addition, the limiting rollers 12 under this design are higher than the predetermined water level line 11, which can facilitate observation of the use of the limiting rollers 12 during pipe penetration; the inner pipe end anti-collision rollers 13 under this design can avoid the limiting rollers 12 while playing a good anti-collision role.

[0096] Further, as shown in the figure, Figure 2 after the end of the first section of the inner pipe 1 is pushed into the hole entry water stop device 4, an inner pipe end water stop wall 7 is made at the end of the section of the inner pipe 1, which is built up from the inner wall bottom of the end of the inner pipe 1 upwards, with a height higher than the predetermined water level line 11. In this embodiment, the inner pipe end water stop wall 7 is built up by concrete solid bricks and MU10 cement mortar, with a wall thickness of 400 mm, a wall top height higher than the predetermined water level by 300-500 mm, and the wall body is cement mortar finished on both sides, which can prevent water from flowing into the inner pipe 1 between the outer sleeve 2 and the inner pipe 1, and effectively block the water flow.

[0097] Further, as shown in the figure, Figure 2 water is injected into the outer sleeve 2 from the receiving well, so that the water level reaches the height of the predetermined water level line 11, wherein the height of the predetermined water level line 11 is the water surface height when the water buoyancy makes the inner pipe 1 float above the concrete cushion 10.

[0098] As shown in the figure, Figure 11 the predetermined water level line 11 is calculated as follows by a preferred embodiment, in which the outer sleeve 2 is a reinforced concrete pipe with an inner diameter of 4000 mm, the inner pipe 1 has an outer diameter of 3260 mm and a wall thickness of 30 mm, and the steel material density is 7.85 t / m 3 , so that the weight of each meter of pipe material is 2.3885 t, and the height of the predetermined water level line 11 is calculated as follows:

[0099] According to the buoyancy calculation formula: F 浮 =G 排 ;

[0100] When the inner penetrating pipe 1 with an outer diameter of 3260 mm and a wall thickness of 34 mm floats on the water surface, the water volume to be displaced per meter of pipe material is 2.3885 m 3 ;

[0101] That is, the outer wall cross-sectional area S of the pipe material immersed in water is 2.3885 m2;

[0102] The arc area formula S = 0.5r 2 (θ-sinθ) is introduced.

[0103] Substituting the numerical value 2.3885 = 0.5x1.63 2 (θ-sinθ) is introduced.

[0104] Using the Newton iteration method, the solution is θ (central angle) = 2.44195 (radians).

[0105] Then the height of the predetermined water level line 11 from the center line of the inner penetrating pipe 1 is h = r-cos(θ / 2).

[0106] The calculation result is h = 0.559 m.

[0107] During the floating pipe process, the distance h' between the inner penetrating pipe 1 and the precast concrete cushion 10 is controlled to be 50 mm.

[0108] Then the height of the predetermined water level line 11 is H = (R+h')-h.

[0109] Substituting the numerical value, we get H = 1.491 m.

[0110] After the water source is injected to the predetermined water level line 11 of 1.491 m, the conventional pipe connection and jacking stage is entered, but due to the influence of factors such as water evaporation, slight leakage, jacking length and volume increase of the inner penetrating pipe 1, the water level in the outer sleeve pipe 2 will change. Further, the water level in the outer sleeve pipe 2 needs to be monitored during the conventional pipe jacking stage, and the water level height needs to be adjusted through measures such as water pumping and drainage, so that it is always within the range of 1.491 m±25 mm of the predetermined water level. Further, to avoid the problems of collision between the inner penetrating pipe 1 and the outer sleeve pipe 2 or the precast concrete cushion 10 below, or tearing of the rubber water stop curtain 15 at the entrance and the rubber water stop curtain 19 at the exit.

[0111] Further, in the embodiment, the jacking process of the floating pipe also includes the following contents:

[0112] Specifically, as Figure 2 and Figure 4As shown, the inner pipe 1 stops jacking when it reaches a certain interval position in front of the exit hole water stop device 6, in this embodiment, the interval position is 50 cm, at this time, the inner pipe end head anti-collision roller 13 is removed to avoid collision with the exit hole water stop device 6. At this time, the inner pipe 1 is close to the exit hole water stop device 6, and can be guided and continued to advance by relying on the limiting roller 12 in the outer sleeve 2, so that the inner pipe 1 end head passes through the hole water stop device 6.

[0113] Specifically, the inner pipe 1 stops advancing after passing through the exit hole water stop device 6 by 50 cm. At this time, the inner pipe 1 is closely attached to the exit hole rubber water stop cloth 19, and the water source between the inner pipe 1 and the outer sleeve 2 is blocked by the entrance hole water stop device 4 and the exit hole water stop wall 8. At this time, the water source between the exit hole water stop device 6 and the exit hole water stop wall 8 is emptied, and the exit hole water stop wall 8 is removed to facilitate the exit of the inner pipe 1.

[0114] Specifically, when the end head of the inner pipe 1 protrudes from the end head of the outer sleeve 2 by a certain distance, the jacking of the inner pipe 1 is completed, in this embodiment, the distance is 0.5 m. At this time, the water source between the outer sleeve 2 and the inner pipe 1 can be discharged by adjusting the exit hole water stop baffle 20 of the exit hole water stop device 6 and loosening the exit hole rubber water stop cloth 19. At this time, the inner pipe 1 will vertically fall to the precast concrete cushion block 10 under the limiting of the limiting device 12 in the outer sleeve 2 to reach the designed height. Finally, the inner pipe end head water stop wall 7 is removed to complete the entire work of the inner pipe 1 jacking.

[0115] In summary, the present application provides a pipe floating pipe construction method in a pipe sleeve, which uses water as a carrier between the outer sleeve and the inner pipe, greatly increases the carrying capacity and damage resistance of the carrier between the sleeves, reduces the friction of the inner pipe propulsion, improves the construction efficiency, and shortens the overall construction period. The present application is provided with a hole entrance water stop device and a hole exit water stop device at both ends of the outer sleeve, both of which use rubber water stop cloth to close the water source, have good airtightness, and can prevent water leakage. The present application is provided with a limiting roller at the hole entrance position, the inner wall of the outer sleeve and the end of the inner pipe, which plays a role in fixing the pipe position and propulsion guidance, and can make the present application applicable to some large curvature radius inner pipe construction. At the same time, the limiting roller is made of nylon, and the devices and the inner pipe are all connected by soft connection, which has a good protective effect on the corrosion-resistant coating of the inner pipe. In addition, the present application effectively solves the problems of insufficient structural strength, poor durability and easy damage to the outer corrosion-resistant coating of the pipe in the traditional roller launching method, the pipe outer wall installation wheel method and the pulley set propulsion method, and is especially suitable for large diameter, long distance and high protection requirement inner pipe construction, and has good economic efficiency and implementation effect.

[0116] Although the content of the present application has been described in detail by the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present application. After reading the above content, various modifications and alternatives of the present application will be obvious to those skilled in the art. Therefore, the protection scope of the present application should be defined by the appended claims.

Claims

1. A buoyancy pipe-through method of construction, using buoyancy to pass a through-pipe through an intermediate section of an outer casing, characterised in that, Specifically comprising the following steps: S1, installing an entry hole stopper and an entry hole limiter on one side end of the outer sleeve as an entry hole, and installing an exit hole stopper and an exit hole stopper wall on the other side end of the outer sleeve as an exit hole; S2, arranging prefabricated concrete pads in the cavity of the outer sleeve at the bottom in an even interval along the axis, and installing a limiting roller on the inner wall of the outer sleeve; S3, pushing the end of the first section of the inner penetrating pipe into the entry hole stopper by a power system to a first set distance, then making an inner penetrating pipe end stopper wall at the end of the inner penetrating pipe, and installing an inner penetrating pipe end anti-collision roller at the end of the inner penetrating pipe; S4, injecting water between the outer sleeve and the inner penetrating pipe, and when the water level reaches a predetermined level, the inner penetrating pipe continues to normally connect and advance; S5, when the inner penetrating pipe advances to a second set distance before the exit hole stopper, the advancing is paused, and after the inner penetrating pipe end anti-collision roller is removed, the advancing is continued; S6, after the inner penetrating pipe is ejected from the exit hole stopper, the advancing is paused, the water source between the exit hole stopper and the exit hole stopper wall is drained, and the exit hole stopper wall is removed; S7, the advancing is continued, and the inner penetrating pipe is pushed out of the exit hole of the outer sleeve, and the advancing of the inner penetrating pipe is completed; S8, the water source between the inner penetrating pipe and the outer sleeve is drained, and the inner penetrating pipe is vertically dropped onto the prefabricated concrete pads; S9, the inner penetrating pipe end stopper wall is removed, and the buoyancy penetrating construction is completed; The outer wall of the entry hole of the outer sleeve is annularly provided with an outer sleeve hole flange, and the outer side of the outer sleeve hole flange is welded with the entry hole limiter; The entry hole limiters are respectively arranged above the entry hole of the outer sleeve and on the corresponding two sides in the horizontal direction; Each entry hole limiter comprises a first L-shaped limiter, a first nylon roller, and a first connecting piece, and the first nylon roller is arranged towards the outer wall of the inner penetrating pipe; the first L-shaped limiter is formed by vertically welding two first H-shaped steels; the first nylon roller is connected to one of the first H-shaped steels through the first connecting piece; the other first H-shaped steel is welded and connected with the outer sleeve hole flange; The limiting rollers are installed on the inner wall of the outer sleeve, and each limiting roller comprises a second H-shaped steel, a support plate, a fastener, a second nylon roller, and a second connecting piece, and the second nylon roller is arranged towards the outer wall of the inner penetrating pipe; The second nylon roller is connected to the upper part of the second H-shaped steel through the second connecting piece; the lower part of the second H-shaped steel is welded and connected with the support plate; the support plate is provided with a fixing hole, and the support plate is fixed on the inner wall of the outer sleeve through the fastener.

2. The buoyancy pipe ramming construction method according to claim 1, wherein The entry hole stopper comprises an entry hole flange, an entry hole rubber stopper, an entry hole stopper baffle, and a plurality of entry hole connecting pieces; The entry hole flange is annular in structure and T-shaped in cross section, the T-shaped longitudinal beam is installed on the inner wall of the entry hole of the outer sleeve, and the T-shaped transverse beam is connected with the entry hole stopper baffle through a plurality of entry hole connecting pieces; The inlet hole rubber water stop curtain is located in the middle part of the inlet hole flange and the inlet hole water stop baffle and is clamped and fixed by the inlet hole flange and the inlet hole water stop baffle.

3. The method of buoyancy pipe installation according to claim 1, wherein The outer sleeve inlet hole is further provided with a guide rail to carry the inner penetrating pipe.

4. The method of buoyancy pipe installation of claim 1, wherein, The outlet hole water stop wall is located at the outlet hole position of the outer sleeve, is built up from the bottom of the inner wall of the outlet hole pipe wall upwards, and has a horizontal height higher than the predetermined water level line. The inner penetrating pipe end head water stop wall is provided at the end head of the first section of the inner penetrating pipe, is built up from the bottom of the inner wall of the end head of the inner penetrating pipe upwards, and has a horizontal height higher than the predetermined water level line.

5. The method of buoyancy pipe installation according to claim 1, wherein The outlet hole water stop device comprises an outlet hole flange, an outlet hole rubber water stop curtain, an outlet hole water stop baffle and a plurality of outlet hole connecting pieces. The outlet hole flange is annular in structure, is located on the inner side of the outlet hole water stop wall, has an L-shaped cross section, and the L-shaped longitudinal beam is installed on the inner wall of the outlet hole of the outer sleeve, and the L-shaped transverse beam is connected with the outlet hole water stop baffle through the plurality of outlet hole connecting pieces. The outlet hole rubber water stop curtain is located in the middle part of the outlet hole flange and the outlet hole water stop baffle and is clamped and fixed by the outlet hole flange and the outlet hole water stop baffle.

6. The method of buoyancy pipe installation according to claim 1, wherein The inner penetrating pipe end head anti-collision roller comprises a third H-shaped steel, a third nylon roller and a third connecting piece, and the third nylon roller is arranged towards the inner wall of the outer sleeve. The third nylon roller is connected to the upper part of the third H-shaped steel through the third connecting piece, and the lower part of the third H-shaped steel is welded to the outer wall of the end head of the inner penetrating pipe.

7. The buoyancy pipe ramming method as claimed in claim 6, wherein The limiting roller is symmetrically installed below the horizontal center line of the outer sleeve and forms a certain angle with the horizontal center line of the outer sleeve, and the inner penetrating pipe end head anti-collision roller is installed above the horizontal center line of the inner penetrating pipe and forms a certain angle with the horizontal center line of the inner penetrating pipe.

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