Reusable pipe jacking open caisson device

Abstract

The invention provides a reusable pipe-jacking open caisson device, and relates to the technical field of pipe-jacking open caisson, the reusable pipe-jacking open caisson device comprises a frame-shaped blade foot, a bottom plate is arranged in the frame-shaped blade foot, a frame-shaped base is arranged at the upper end of the frame-shaped blade foot, a shaft is arranged at the upper end of the frame-shaped base, and a frame-shaped crown beam is arranged at the upper end of the shaft. A supporting frame is arranged at the upper end of the frame-shaped top beam, a jacking mechanism is arranged in the shaft, and the jacking mechanism is used for providing jacking force during pipe jacking construction. By adopting the design of assembling and forming the prefabricated components, the construction period is greatly shortened, the production and processing are convenient, each component can be recycled and reused, the self weight is light, and the transportation is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe-jacking caissons, and specifically to a reusable pipe-jacking caisson device. Background Art

[0002] As an important engineering structure, caissons have been widely used in many fields such as urban municipal engineering (such as non-excavation pipeline construction wells, water intake heads, pump houses, etc.), bridge pier engineering (such as anchor blocks, equipment foundations, etc.), civil building underground space development, and tunnel engineering shafts.

[0003] However, several types of caissons currently in wide use still have many limitations in actual use. For example, cast-in-situ concrete caissons need to be cured on-site to the specified strength before construction, resulting in a long processing cycle and affecting the surrounding traffic at the same time; the caisson segments of precast concrete caissons need to be processed by mold opening in the factory, and they are large in volume and heavy in weight, which not only poses high requirements for transportation but also reduces the flexibility of construction; although the existing steel caissons are relatively light, their sizes are fixed, making it difficult to adjust according to different engineering requirements, and additional sinking assistance measures are required due to their relatively light self-weight. In addition, it is difficult to recycle and reuse them after construction. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present application proposes a reusable pipe-jacking caisson device. The device adopts a design of assembling prefabricated components, which greatly shortens the construction cycle. It mainly uses steel as raw materials, is convenient for production and processing, and each component can be recycled and reused. Its self-weight is light, which is convenient for transportation. At the same time, through distributed optical fiber sensing technology, real-time monitoring of the deformation of the device during the construction stage is realized, and the size of the caisson body can be flexibly adjusted according to the engineering requirements according to the module. In addition, the device can sink by relying on its own weight without additional loading, and the support of the upper opening of the caisson body and the soil-taking or hoisting machinery are integrally designed, improving the mechanization level of construction.

[0005] A reusable pipe-jacking caisson device provided by the present invention includes a frame-shaped cutting edge. A bottom plate is arranged inside the frame-shaped cutting edge. A frame-shaped base is arranged at the upper end of the frame-shaped cutting edge. A shaft is arranged at the upper end of the frame-shaped base. A frame-shaped capping beam is arranged at the upper end of the shaft. A support frame is arranged at the upper end of the frame-shaped capping beam. A jacking mechanism is arranged inside the shaft, and the jacking mechanism is used to provide jacking force during pipe-jacking construction.

[0006] Preferably, the frame-shaped cutting edge includes two long-edge cutting edges and two short-edge cutting edges. A number of embedded grouting sleeves are arranged at both ends of the long-edge cutting edge. A number of anchor bars are arranged on the inner sides of both ends of the short-edge cutting edge, and the anchor bars are adaptively connected to the grouting sleeves; bottom plate grooves are arranged on the inner walls of the long-edge cutting edge and the short-edge cutting edge, and the bottom plate grooves are used to embed the bottom plate and are fixedly connected through bottom plate anchor bars.

[0007] Preferably, the frame-shaped base includes two long-side steel beams and two short-side steel beams. An L-shaped steel beam is provided between adjacent long-side and short-side steel beams. Base connecting plates are provided on both sides of the long-side and short-side steel beams. The base connecting plates are connected to the L-shaped steel beam by a number of tension bolts. A rabbet groove is provided on the outer wall of the frame-shaped cutting edge. The frame-shaped base and the frame-shaped cutting edge are connected by a number of tension bolts.

[0008] Preferably, the shaft includes two long-side barrel walls and two short-side barrel walls. An L-shaped hollow steel column is provided between adjacent long-side and short-side barrel walls; the upper part of the short-side barrel wall and the long-side barrel wall include a number of hollow steel column units. A hollow wall panel is provided between adjacent hollow steel column units. Fiber reinforced strain sensing optical cables are provided on the inner walls of the L-shaped hollow steel column and the hollow steel column units. A through-long grouting water pipe is provided on the outer edge of the L-shaped hollow steel column and the hollow steel column units; a pipe hole wall panel is provided at the lower part of one short-side barrel wall, and a reaction force combination wall panel is provided at the lower part of the other short-side barrel wall. A pipe jacking hole is provided on the pipe hole wall panel. Conversion steel beams are provided at the upper ends of the pipe hole wall panel and the reaction force combination wall panel.

[0009] Preferably, the hollow wall panel is made of steel plates and has a box-shaped structure with openings at both upper and lower ends and closed on all sides. The interior of the hollow wall panel is divided by a number of first vertical partitions and a number of first horizontal partitions. First filler holes are provided on the first horizontal partitions. The first filler holes are used for filling to increase the self-weight of the hollow wall panel.

[0010] Preferably, the pipe hole wall panel is made of steel plates and has a box-shaped structure with openings at both upper and lower ends and closed on all sides. The interior of the pipe hole wall panel is divided by a number of second horizontal partitions. Second filler holes are provided on the second horizontal partitions. The second filler holes are used for filling to increase the self-weight of the pipe hole wall panel; the reaction force combination wall panel is made of steel plates and has a box-shaped structure with closed on all sides. The interior of the reaction force combination wall panel is divided by a number of second vertical partitions. The interior of the reaction force combination wall panel is filled with concrete and cured to form.

[0011] Preferably, an inner ring brace is provided inside the shaft. The inner ring brace includes two long-side cross beams and two short-side cross beams. Adjacent long-side and short-side cross beams are connected by corner connectors. Corner braces are provided between the inner walls of adjacent long-side and short-side cross beams. Both ends of the corner braces are respectively connected to the inner walls of the long-side cross beam and the short-side cross beam through T-shaped connecting plates.

[0012] Preferably, the frame-shaped capping beam comprises two long-side capping beams and two short-side capping beams. An L-shaped capping beam is arranged between adjacent long-side and short-side capping beams. Capping beam connecting plates are arranged on both sides of the long-side and short-side capping beams. The capping beam connecting plates are connected to the L-shaped capping beam by a number of tie bolts, and the frame-shaped capping beam is connected to the shaft by a number of tie bolts.

[0013] Preferably, the support frame comprises two base beams embedded in the frame-shaped capping beam. Two support beams are arranged at the upper ends of the two base beams. Truss sheets are arranged at the upper ends of the two support beams. An upper chord track beam is arranged at the upper end of the truss sheet. The opposite ends of the two upper chord track beams are connected by truss struts.

[0014] Preferably, the jacking mechanism comprises a number of jacks and adjustable jack supports. The adjustable jack support comprises four frame columns. A number of frame beams are connected between adjacent frame columns. A number of outrigger support beams are arranged on the outer sides of the frame columns. One jack is installed by two outrigger support beams on the same horizontal plane and fixed by a clamp; a backseat wall is arranged at the rear side of the jacking mechanism.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Most components of the device of the present invention can be recycled and reused, which has a high economic advantage compared with various cast-in-place or prefabricated concrete caissons; by adopting a profiled steel cutting edge and a prefabricated concrete bottom plate, full prefabricated construction and full component recycling can be further realized.

[0016] 2. The caisson of the present invention can achieve self-weight sinking by relying on the filling of the wall panels with fillers. When necessary, air can also be injected into the grouting water pipes to form a slurry jacket-air curtain to reduce resistance and assist sinking, without additional loading; the fillers can be conveniently taken out and reused through the processes of water injection, vibration, and mud pumping, and at the same time, the self-weight is reduced, which is convenient for the overall recovery of the caisson device after construction.

[0017] 3. The components of the device of the present invention are reasonably disassembled, which has the advantages of small volume, light weight, convenient transportation, and quick installation while ensuring the functions.

[0018] 4. The main vertical components (such as various steel columns) of the present invention are provided with closed cavities, and fiber-reinforced rib strain sensing optical cables are arranged at intervals along the entire circumference of the shaft to realize real-time deformation monitoring and timely early warning to avoid safety accidents.

[0019] 5. The present invention adopts modular design, so that the dimensions (length, width, and height) of the device can be flexibly adjusted according to engineering requirements, and the standard components can be reused multiple times, and the adaptability is significantly better than that of traditional steel caissons with fixed dimensions.

[0020] 6. The upper opening support of the well body of the present invention is integrally designed with the soil extraction or hoisting machinery, reducing manual operation and improving the construction mechanization level and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the reusable pipe jacking caisson device in the embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the structure of the frame-shaped cutting edge in the embodiment of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the long-side cutting edge in the embodiment of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the frame-shaped base in the embodiment of the present invention.

[0025] Figure 5 It is a schematic diagram of the split structure of the lower part of the wellbore in the embodiment of the present invention.

[0026] Figure 6 It is a schematic diagram of the structure of the hollow steel column in the embodiment of the present invention.

[0027] Figure 7 It is a schematic diagram of the split structure of the upper part of the wellbore and the inner ring brace in the embodiment of the present invention.

[0028] Figure 8 It is a schematic diagram of the partial structure of the reusable pipe jacking caisson device in the embodiment of the present invention.

[0029] Figure 9 It is a schematic diagram of the structure of the frame-shaped capping beam in the embodiment of the present invention.

[0030] Figure 10 It is an elevation view of the adjustable jack support in the embodiment of the present invention.

[0031] Figure 11 It is a plan view of the adjustable jack support in the embodiment of the present invention.

[0032] Figure 12 It is a schematic diagram of the structure of the backseat wall in the embodiment of the present invention.

[0033] In the figure, 1-frame-shaped cutting edge, 11-long-side cutting edge, 111-tongue-and-groove, 112-grouting sleeve, 113-opposite pull bolt hole, 114-bottom plate groove, 115-bottom plate anchor bar, 12-short-side cutting edge, 122-anchor bar; 2-frame-shaped base, 21-long-side steel beam, 22-short-side steel beam, 23-L-shaped steel beam, 24-opposite pull bolt, 25-base connecting plate; 3 - Shaft, 31 - L - shaped hollow steel column, 32 - Long - side wall, 321 - Hollow steel column unit, 323 - Grouting water pipe, 324 - Fiber - reinforced strain - sensing optical cable, 33 - Short - side wall, 34 - Hollow wall panel, 341 - First vertical partition board, 342 - First horizontal partition board, 343 - First filling hole, 35 - Pipe - hole wall panel, 351 - Jacking pipe opening, 352 - Second horizontal partition board, 353 - Second filling hole, 36 - Reaction - force combined wall panel, 361 - Vertical partition board, 362 - High - strength concrete, 37 - Transfer steel beam; 4 - Inner - well ring bracing, 41 - Double - channel steel cross - beam, 42 - H - shaped steel connector, 43 - Corner connector, 44 - Corner diagonal brace, 441 - T - shaped connecting plate; 5 - Frame - type capping beam, 51 - Long - side capping beam, 52 - Short - side capping beam, 53 - L - shaped capping beam; 6 - Support frame, 611 - Base beam, 612 - Support beam, 62 - Truss panel, 63 - Upper - chord track beam, 64 - Truss strut, 65 - Traveling crane; 7 - Bottom plate; 8 - Adjustable jack support, 811 - Frame column, 812 - Frame beam, 82 - Outrigger support beam, 821 - Wedge nut, 822 - Solid stud, 823 - Large - diameter nut, 824 - Section - steel support beam, 83 - Inner support beam, 84 - Clamp, 85 - Jack; 9 - Backseat wall. Specific implementation mode

[0034] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0035] Embodiment: As Figures 1 - 12 shown, a reusable pipe - jacking caisson device includes a prefabricated frame - type cutting edge 1. Inside the frame - type cutting edge 1, there is a bottom plate 7. The bottom plate 7 is a cast - in - place concrete bottom plate. According to the actual project (such as when there is no need to build an inspection well), a prefabricated concrete bottom plate can also be selected. At the upper end of the frame - type cutting edge 1, there is a frame - type base 2. The frame - type base 2 is composed of steel materials spliced together. At the upper end of the frame - type base 2, there is a shaft 3. The shaft 3 is assembled with steel materials. In the middle of the shaft 3, there is an inner - well ring bracing 4. At the upper end of the shaft 3, there is a frame - type capping beam 5. The frame - type capping beam 5 is composed of steel materials spliced together. At the upper end of the frame - type capping beam 5, there is a support frame 6. Inside the shaft 3, there is a jacking mechanism, and the jacking mechanism is used to provide jacking force during pipe - jacking construction.

[0036] Further, as Figure 2 、 3As shown in Fig. 8, the frame - shaped cutting edge 1 includes two long - side cutting edges 11 and two short - side cutting edges 12, which are all precast reinforced concrete components and are formed by processing in the factory. The long - side cutting edges 11 are located at the long sides of the bottom of the whole device, and their lengths are determined according to the engineering design requirements and the well - body modulus. At the intersection positions of the two ends of the long - side cutting edges 11 and the short - side cutting edges 12, several grouting sleeves 112 are reserved. The grouting sleeves 112 are provided with grouting holes and slurry - discharging holes. The short - side cutting edges 12 are located at the short sides of the bottom of the whole device, and their lengths are determined according to the engineering design requirements and the well - body modulus. At the positions opposite to the grouting sleeves 112 reserved on the long - side cutting edges 11 at the two ends of the short - side cutting edges 12, anchoring steel bars 122 are reserved, and the anchoring steel bars 122 are adaptively connected with the grouting sleeves 112. In the middle of the inner walls of the long - side cutting edges 11 and the short - side cutting edges 12, bottom - plate grooves 114 are provided, and the bottom - plate grooves 114 are used for embedding the bottom plate 7 and are fixedly connected through bottom - plate anchoring bars 115.

[0037] Optionally, the frame - shaped cutting edge 1 can also be processed and made of steel profiles according to the actual project, and high - strength bolts are used to connect and fix between the cutting - edge components. During actual operation, after the open - caisson is excavated and sunk to the designated elevation, the bottom of the well is leveled and the floating soil is removed. Two layers of pre - tied steel - wire mesh are placed and lapped with the bottom - plate anchoring bars 115 of the frame - shaped cutting edge 1, and then the concrete bottom plate is poured.

[0038] Furthermore, as Figure 3 、 4 shown, the frame - shaped base 2 includes two long - side steel beams 21 and two short - side steel beams 22. An L - shaped steel beam 23 is arranged between the adjacent long - side steel beam 21 and short - side steel beam 22. The long - side steel beams 21, short - side steel beams 22 and L - shaped steel beams 23 are all processed and made of H - shaped steel. Base connecting plates 25 are arranged on both sides of the long - side steel beams 21 and short - side steel beams 22, and the base connecting plates 25 are connected to the L - shaped steel beam 23 through several tension bolts. On the upper parts of the outer walls of the long - side cutting edges 11 and short - side cutting edges 12, rabbet grooves 111 are provided to reduce the surface protrusions caused by the frame - shaped base 2 and the tension bolts 24, and reduce the side friction resistance during sinking. Several tension - bolt holes 113 are reserved on both the frame - shaped base 2 and the frame - shaped cutting edge 1 (within the height range of the rabbet grooves 111). The frame - shaped base 2 and the frame - shaped cutting edge 1 are connected and fixed through several tension bolts 24 and tension - bolt holes 113. The L - shaped steel beams 23 are located at the four corners of the frame - shaped base 2, and bolt holes are opened at both the upper and lower parts. The lower part is tightly fixed to the two ends of the long - side cutting edges 11 and short - side cutting edges 12 through the tension bolts 24, and is connected to the long - side steel beams 21 and short - side steel beams 22 through the base connecting plates 25 to improve the integrity. In this way, the base joints can be staggered from the cutting - edge joints, improving the overall stability of the device; the nuts of the tension bolts 24 are on the inner side and the bolts are on the outer side, which is convenient for loosening during recovery.

[0039] Furthermore, as Figure 1 、 5As shown in FIG. -7, the shaft 3 includes two long-side cylindrical walls 32 and two short-side cylindrical walls 33. L-shaped hollow steel columns 31 are arranged between adjacent long-side cylindrical walls 32 and short-side cylindrical walls 33. At the upper part of the short-side cylindrical wall 33 and the long-side cylindrical wall 32, there are several hollow steel column units 321. A hollow wall panel 34 is arranged between adjacent hollow steel column units 321. Fiber reinforced strain sensing optical cables 324 are pasted on the inner walls of the L-shaped hollow steel columns 31 and the hollow steel column units 321 with epoxy resin glue. A continuous grouting water pipe 323 is arranged at the outer edge of the L-shaped hollow steel columns 31 and the hollow steel column units 321. The grouting water pipe 323 is made of seamless steel pipe, interrupted at the position of the frame base 2 or the frame capping beam 5 and butt-jointed with a sealing head or a small pipe. Water outlet holes are provided on the wall body of the grouting water pipe 323, and elastic sealing measures such as rubber leather sleeves are arranged outside the water outlet holes. A number of tension bolts holes are provided on the L-shaped hollow steel columns 31 and the hollow steel column units 321 for connecting with the frame base 2 and the frame capping beam 5. A pipe hole wall panel 35 is arranged at the lower part of one short-side cylindrical wall 33, and a reaction force combination wall panel 36 is arranged at the lower part of the other short-side cylindrical wall 33. A jacking pipe hole 351 is provided on the pipe hole wall panel 35. Conversion steel beams 37 are arranged at the upper ends of the pipe hole wall panel 35 and the reaction force combination wall panel 36.

[0040] Among them, the long-side cylindrical wall 32 is processed and formed by steel plates in the factory, arranged at intervals on the long side of the shaft 3, and the bottom end is tightly fixed in the upper notch of the long-side steel beam 21 by tension bolts. The hollow steel column units 321 of the short-side cylindrical wall 33 are arranged at the upper part of the short side of the shaft 3, and the bottom end is tightly fixed in the upper notch of the conversion steel beam 37 at its lower end by tension bolts. The L-shaped hollow steel column 31 is processed and formed by steel plates in the factory, arranged at the four corners of the shaft 3, generally in an L shape, and the bottom end is tightly fixed on the upper part of the L-shaped steel beam 23 by tension bolts.

[0041] Among them, the hollow wall panel 34 is made of steel plates into a box structure with openings at the upper and lower ends and closed on all sides according to the modulus. The inside of the hollow wall panel 34 is separated by a first vertical partition 341 and several first horizontal partitions 342. First filling holes 343 are opened on the first horizontal partitions 342. The first filling holes 343 are used for filling materials to increase the self-weight of the hollow wall panel 34. The filling materials can be bulk materials such as sand, and are inserted into the side notches of the L-shaped hollow steel columns 31, the long-side cylindrical walls 32 and the short-side cylindrical walls 33 and clamped tightly during installation.

[0042] Among them, the pipe hole wall panel 35 is processed and formed by steel plates in the factory according to the pipe jacking diameter, arranged on one side of the pipeline entering and exiting the shaft 3, and made into a box-shaped structure with openings at both the upper and lower ends and closed on all sides. The interior of the pipe hole wall panel 35 is separated by several second transverse partitions 352, and second packing holes 353 are opened on the second transverse partitions 352. The second packing holes 353 are used for packing to increase the self-weight of the pipe hole wall panel 35. A rubber water stop ring is fixed inside the pipe jacking hole 351. When installing the pipe hole wall panel 35, it is inserted into the side slot of the L-shaped hollow steel column 31 and clamped tightly.

[0043] Among them, the reaction force combined wall panel 36 is made of steel plates into a box-shaped structure with closed sides. The interior of the reaction force combined wall panel 36 is separated by several second vertical partitions 361, and the interior of the reaction force combined wall panel 36 is filled with high-strength concrete 362 and cured and formed. When installing, it is inserted into the side slot of the L-shaped hollow steel column 31 and clamped tightly.

[0044] Further, as Figure 7 , 8 shown, several well inner ring braces 4 are arranged in the middle part of the shaft 3. The several well inner ring braces 4 are evenly arranged along the height direction of the shaft 3 to resist the external soil and water pressure. The well inner ring brace 4 includes two long side cross beams and two short side cross beams. The long side cross beam and the short side cross beam are composed of several double channel steel cross beams 41 connected by H-shaped steel connectors 42. Adjacent long side cross beams and short side cross beams are connected by corner connectors 43. The double channel steel cross beam 41 uses double channel steels with their webs facing each other, is cut according to length and modulus, and bolt holes are opened at both ends and in the middle. When installing, the channel steels are respectively buckled from above and below on the H-shaped steel connector 42 and the corner connector 43, and are connected and fixed with high-strength bolts. An angular brace 44 is arranged between the inner walls of adjacent long side cross beams and short side cross beams. Both ends of the angular brace 44 are respectively connected to the inner walls of the long side cross beam and the short side cross beam through T-shaped connecting plates 441. The angular brace 44 is made of section steel, and both ends are processed into T-shaped connecting plates 441 (with holes in the middle), inserted into the middle gap of the double channel steel cross beam 41, and connected and fixed with high-strength bolts.

[0045] Further, as Figure 9 shown, the frame-shaped capping beam 5 serves to restrain the shaft 3 and as the base of the lifting truss, and includes two long side capping beams 51 and two short side capping beams 52. An L-shaped capping beam 53 is arranged between adjacent long side capping beams 51 and short side capping beams 52. Capping beam connecting plates are arranged on both sides of the long side capping beam 51 and the short side capping beam 52. The capping beam connecting plates and the L-shaped capping beam 53 are connected by several pairs of tension bolts. The L-shaped capping beam 53 is connected to the long side capping beam 51 and the short side capping beam 52 as a whole through the capping beam connecting plates. The frame-shaped capping beam 5 is connected to the long side barrel wall 32, the short side barrel wall 33, and the L-shaped hollow steel column 31 by several pairs of tension bolts.

[0046] Optionally, when the well depth is relatively deep and multiple sections need to be joined, the original top capping beam can be modified into a middle capping beam to transition and connect the upper and lower shafts. For the construction method and dimensions, refer to the box-shaped capping beam 5. The upper and lower notches are connected to the shaft through tie bolts.

[0047] Furthermore, as Figure 1 、 8 、9 show, the support frame 6 is horizontally spanned on the box-shaped capping beam 5, playing the roles of horizontal support, soil excavation during sinking, and hoisting pipelines and equipment during pipe jacking. It includes two base beams 611 embedded in the box-shaped capping beam 5. The base beams 611 are processed from square steel pipe profiles, placed in the upper notch of the long-side capping beam 51, and fixed to the upper side of the long-side capping beam 51 through tie bolts. Two transverse support beams 612 are installed at the upper ends of the two base beams 611 through high-strength bolts. The support beams 612 cannot be disassembled after the sinking operation starts. According to the process requirements, connecting lugs are reserved on the upper part of the support beams 612, and the truss pieces 62 or soil excavation machinery are connected and fixed using high-strength bolts. The truss pieces 62 are used in combination with the upper chord track beam 63. The truss pieces 62 are paired and spanned across the shaft. They are truss units processed from steel profiles that can be spliced and lengthened. The splicing interface is a socket interface with bolt holes. After splicing in place, the bolt holes just penetrate through. During installation, the lower part is fixed to the support beam 612 through high-strength bolts, and the upper part is firmly connected to the lower part of the upper chord track beam 63 through bolts; the upper chord track beam 63 serves as the upper chord of the truss and the crane track. It is processed from steel profiles, with connecting lugs reserved at the lower part for connection with the truss pieces 62, and both ends are connected and fixed through the truss struts 64 to form a space truss for the crane to travel; the traveling crane 65 can freely move on the track formed at the top of the upper chord track beam 63, and the middle trolley can also move in the direction perpendicular to the truss pieces 62. Among them, the soil excavation machinery can be a bucket excavator or a hydraulic flushing and suction machine according to the on-site open caisson sinking and well pit drainage process, and both are customized by machinery manufacturers.

[0048] Furthermore, as Figures 10 - 12As shown in the figure, the jacking mechanism includes several jacks 85 and adjustable jack supports 8. The adjustable jack supports 8 play a role in fixing equipment such as jacks and laser guiding instruments. It includes four frame columns 811, and several frame beams 812 are connected between adjacent frame columns 811. The frame columns 811 are processed from customized steel profiles, and the overall cross-section is in the shape of an H. The two side notches are inwardly recessed to form wedge-shaped ribs that are thick on the outside and thin on the inside. The inner surface of the wedge-shaped ribs is evenly grooved to increase friction. The two ends of the frame beam 812 are connected to the frame column 811 to form a closed support frame, and a support beam 83 is installed inside the support frame. Several outrigger beams 82 are arranged on the outside of the frame column 811. Each jack 85 is installed through two outrigger beams 82 on the same horizontal plane and fixed by a clamp 84. A rear seat wall 9 is arranged at the rear of the jacking mechanism. The rear seat wall 9 includes a closed steel frame, and a reinforced concrete slab is arranged inside the closed steel frame. It is fixed to the L-shaped hollow steel column 31 of the shaft 3 by tie bolts, and is used to evenly transfer the reaction force of the jack 85 to the reaction force combined wall panel 36.

[0049] Among them, the adjustable jack support 8 can adjust the positions of various equipment according to the pipe diameter. The adjustment method is as follows: When the pipe radius is R , taking the center of the pipe jacking hole 351 as the origin of the coordinate system, the centers of the four jacks are symmetrically arranged according to the vertical axis, and the horizontal coordinates x and the vertical coordinates y meet the requirements, so as to ensure the rationality of the position of the resultant force point of the jacks.

[0050] Among them, the outrigger beam 82 includes a profiled steel support beam 824. One end of the profiled steel support beam 824 is provided with a solid stud 822. A wedge-shaped nut 821 is arranged at the outer end of the solid stud 822. A large-diameter nut 823 is arranged on the outer wall of the solid stud 822. The wedge-shaped nut 821 is overall rectangular, and wedge-shaped angles are provided at the inner openings at both ends. After being vertically inserted into the notch of the frame column 811 and then turned 90 degrees, the wedge-shaped angles of the wedge-shaped nut 821 are buckled with the wedge-shaped ribs of the frame column 811, and are fixed by tightening the solid stud 822 and the large-diameter nut 823. The solid stud 822 is fixed between the wedge-shaped nut 821 and the profiled steel support beam 824, and a large-diameter nut 823 for fastening is sleeved on the upper part. The profiled steel support beam 824 is processed from steel profiles, and the position of the outrigger beam 82 can be adjusted according to the pipe size and elevation.

[0051] Among them, wedge-shaped nuts, solid studs, and large-diameter nuts for connection are arranged at both ends of the support beam 83. For processing and installation requirements, refer to the outrigger beam 82. The clamp 84 is processed from thin steel plates and is used to fix the jack 85. Both ends are fixed to the outrigger beam 82 by bolts, and the horizontal position can be adjusted; the jack 85 provides the jacking force during pipe jacking construction, and the tail is tightly pressed against the rear seat wall 9.

[0052] The using method of the reusable pipe jacking caisson device includes the following steps: Step 1: According to the design documents and the requirements of the detailed design, process each prefabricated component in the factory, and complete the preparatory work such as site leveling, geological review, surveying and setting out, and temporary support arrangement of the frame-shaped cutting edge 1 at the construction site. If geological defects such as boulders and cavities are found during the geological review, jointly issue adjustment measures with each unit in a timely manner.

[0053] Step 2: After each prefabricated component is transported to the construction site, insert the anchoring steel bars 122 of the short-side cutting edge 12 into the grouting sleeves 112 of the long-side cutting edge 11, fix them through temporary supports, and pour the mixed grouting material into the grouting holes; during the curing period of the grouting material, install the frame-shaped base 2, connect the long-side steel beams 21, short-side steel beams 22, and L-shaped steel beams 23 to the reserved tension bolt holes 113 at the top of the frame-shaped cutting edge 1 through tension bolts 24. The nuts of the tension bolts 24 are on the inner side of the shaft, and the frame-shaped base 2 is enhanced by the base connecting plates 25 to improve the integrity of the connection.

[0054] Step 3: After the strength of the grouting material reaches the standard, install the shaft 3. First, install the L-shaped hollow steel columns 31, long-side wall 32, and short-side wall 33 in the upper notch of the frame-shaped base 2 through tension bolts, and then insert the pipe hole wall panels 35 and the reaction combination wall panels 36 into the two short sides of the shaft respectively. The upper parts of the two types of wall panels are buckled with the conversion steel beams 37. The conversion steel beams 37 are fixed to the L-shaped hollow steel columns 31 at both ends through tension bolts. The holes in the pipe hole wall panels 35 need to adopt temporary plugging measures; insert the hollow wall panels 34 between the steel columns on the short sides and long sides of the shaft to initially form a closed shaft; arrange the H-shaped steel connectors 42 and corner connectors 43 at a certain interval along the height of the shaft, embed the double-channel steel beams 41 in the upper and lower notches of the H-shaped steel connectors 42 and corner connectors 43, and insert the T-shaped connecting plates 441 at both ends of the corner braces 44 into the middle gap of the double-channel steel beams 41. All components are connected and fixed by high-strength bolts 45 to form the internal ring support 4 of the shaft.

[0055] Step 4: According to the monitoring requirements, place monitoring signal transmitters in the cavities of the L-shaped hollow steel columns 31, long-side wall 32, and short-side wall 33 where data needs to be collected; pour fillers into the filler holes in the hollow wall panels 34 and pipe hole wall panels 35 to increase the self-weight. The fillers can be bulk materials such as sand, and insert vibrating rods to vibrate and compact during filling to prepare for the sinking construction; when the well depth is relatively deep and multiple sections need to be connected, a middle crown beam can be added. The processing method and dimensions are the same as those of the frame-shaped crown beam 5, and the upper and lower notches are connected to the L-shaped hollow steel columns 31, long-side wall 32, and short-side wall 33 through tension bolts; when installing the frame-shaped crown beam 5, buckle the long-side crown beam 51, short-side crown beam 52, and L-shaped crown beam 53 on the steel columns and wall panels of the shaft 3. The tops of the L-shaped hollow steel columns 31, long-side wall 32, and short-side wall 33 are all connected and fixed to the frame-shaped crown beam 5 through tension bolts. The nuts of the tension bolts are on the inner side of the shaft.

[0056] Step 5: Embed the base beam 611 into the notch above the box-shaped crown beam 5 and fix it with tie bolts. Install the support beam 612 on the top of the base beam 611 with high-strength bolts. Install the soil excavation machinery on the support beam 612. When the well depth is small or the drainage sinking method is adopted, the soil excavation machinery can be a bucket excavator; when the well depth is large or the non-drainage sinking method is adopted, a hydraulic flushing and sucking machine can be used. Check the connection and fixation of all the installed components. All tie bolts and high-strength bolts should be firmly connected. While checking, prepare the drag-reducing thixotropic mud at the same time.

[0057] Step 6: Conduct the construction of the caisson sinking. Remove the temporary support at the box-shaped cutting edge 1 part. Symmetrically excavate soil inside the well with the soil excavation machinery. Pour thixotropic mud into the annular space outside the caisson shaft around the caisson to reduce the drag. When necessary, inject pressurized air through the pressure injection water pipes 323 of various steel columns to form a mud jacket-air curtain to reduce the drag and assist the sinking. After sinking to the specified elevation, when the drainage sinking method is adopted, manually level the bottom of the well and remove the floating soil; when the non-drainage sinking method is adopted, pour the bottom sealing concrete, and after it reaches the strength, drain the water inside the well. Remove the soil excavation machinery and install the truss plate 62, the upper chord track beam 63, the truss strut 64 and the traveling crane 65. Use the traveling crane 65 to lift the pre-lashed two-layer steel mesh into the well and lap it with the anchor bars 115 of the bottom plate of the box-shaped cutting edge 1. Pour the bottom plate 7 and conduct the curing.

[0058] Step 7: After the strength of the bottom plate 7 meets the standard, use the traveling crane 65 to lift the adjustable jack support 8 and the back seat wall 9 into the well and install them. At the same time, install the jack 85, the laser guiding instrument and the pipeline guide rail, and adjust the positions of various equipment according to parameters such as the pipeline size and elevation. The adjustment method is as follows: When the pipeline radius is R , take the center of the jacking hole 351 as the origin of the coordinate system, and symmetrically arrange the centers of the four jacks along the vertical axis. The horizontal coordinates x and the vertical coordinates y meet the requirements, so as to ensure the rationality of the position of the resultant force point of the jacks. Connect the fiber-reinforced strain sensing optical cable 324 with the single-end distributed optical fiber strain demodulation instrument, then hoist the pipeline into the well and carry out the jacking pipe construction according to the procedures. At the same time, collect and analyze the monitoring data of the optical cable. The soil waste generated during the jacking pipe jacking is lifted to the ground by the traveling crane 65 and transported away.

[0059] Step 8: After completing the jacking pipe operation, hoist and place the assembled maintenance well. After recycling the filler through the procedures of injecting water, vibrating and pumping out the mud inside the hollow wall panel 34, loosen and recycle the tie bolts 24 connecting the lower part of the box-shaped base 2 and the box-shaped cutting edge 1 inside the well. After the personnel leave the well, pour thixotropic mud into the annular space outside the caisson shaft around the caisson for the second time to reduce the drag. For the deeper parts, inject high-pressure water through the pressure injection water pipes 323 to reactivate the thixotropic mud jacket, and use a crane such as a truck crane to recover the caisson device as a whole.

[0060] In this embodiment, the main components such as tie bolts, high-strength bolts, precast cutting edge, spliced steel base, assembled shaft, inner ring bracing of the shaft, top crown beam, and multi-purpose support frame are quickly spliced to form a caisson device, which is combined with a monitoring signal transmitter, a concrete floor, an adjustable jack support, and a rear seat wall to realize real-time monitoring during pipe jacking construction and operation, greatly reducing the construction period. Each component can be recycled and reused, with a light self-weight for convenient transportation, and real-time monitoring during the construction stage is achieved through the application of distributed optical fiber sensing technology. The size of the shaft can be adjusted according to the actual engineering requirements according to the modulus, and it can sink by its own weight without additional sinking assistance.

[0061] Most components of the device in this embodiment can be recycled and reused, which has significant economic advantages compared with cast-in-situ or assembled concrete caissons; when using a profiled steel cutting edge and an assembled concrete floor, full-assembled construction and full-component recycling can be further realized. The caisson does not need to sink by loading, and it can complete sinking by its own weight after the wall panels are filled with fillers. The fillers can be conveniently taken out and reused through processes such as water injection, vibration, and mud pumping, while reducing the self-weight to facilitate the overall recycling of the caisson device after construction. The device components are reasonably disassembled, which, while ensuring the functions, have the advantages of small volume, light weight, convenient transportation, and fast installation. Closed cavities are provided in various steel columns, and fiber-reinforced strain sensing optical cables can be arranged at intervals along the entire circumference of the shaft to realize real-time data monitoring and timely warning to avoid safety accidents. The device size is designed in a modularized and in-depth manner, and the length, width, and height can be flexibly adjusted according to engineering requirements. Most standard components can be used repeatedly, and the adaptability is far better than the existing steel caisson technology with fixed sizes.

[0062] The above is only the implementation mode of the present invention, and it does not limit the patent scope of the present invention accordingly. Any equivalent solutions made by using the content of the specification of the present invention, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of the present invention.

Claims

1. A reusable pipe-jacking caisson device, characterized in that It includes a frame-shaped cutting edge. A bottom plate is arranged inside the frame-shaped cutting edge. A frame-shaped base is arranged at the upper end of the frame-shaped cutting edge. A shaft is arranged at the upper end of the frame-shaped base. A frame-shaped capping beam is arranged at the upper end of the shaft. A support frame is arranged at the upper end of the frame-shaped capping beam. A jacking mechanism is arranged inside the shaft, and the jacking mechanism is used to provide jacking force during pipe jacking construction.

2. The reusable pipe-jacking caisson device according to claim 1, wherein The frame-shaped cutting edge includes two long-edge cutting edges and two short-edge cutting edges. A number of embedded grouting sleeves are arranged at both ends of the long-edge cutting edge. A number of anchoring steel bars are arranged on the inner sides of both ends of the short-edge cutting edge, and the anchoring steel bars are adaptively connected to the grouting sleeves; bottom plate grooves are arranged on the inner walls of the long-edge cutting edge and the short-edge cutting edge, and the bottom plate grooves are used to embed the bottom plate and are fixedly connected through bottom plate anchoring bars.

3. The reusable pipe jacking caisson device according to claim 1 or 2, characterized in that, The frame-shaped base includes two long-edge steel beams and two short-edge steel beams. An L-shaped steel beam is arranged between the adjacent long-edge steel beam and short-edge steel beam. Base connecting plates are arranged on both sides of the long-edge steel beam and the short-edge steel beam, and the base connecting plates are connected to the L-shaped steel beam through a number of tension bolts. A rabbet groove is arranged on the outer wall of the frame-shaped cutting edge, and the frame-shaped base and the frame-shaped cutting edge are connected through a number of tension bolts.

4. The reusable pipe jacking caisson device according to claim 1 or 2, characterized in that, The shaft includes two long-edge shaft walls and two short-edge shaft walls. An L-shaped hollow steel column is arranged between the adjacent long-edge shaft wall and short-edge shaft wall; at the upper part of the short-edge shaft wall and the long-edge shaft wall include a number of hollow steel column units, and a hollow wall panel is arranged between the adjacent hollow steel column units. Fiber reinforced strain sensing optical cables are arranged on the inner walls of the L-shaped hollow steel column and the hollow steel column units. A long-through grouting water pipe is arranged on the outer edge of the L-shaped hollow steel column and the hollow steel column units; a pipe hole wall panel is arranged at the lower part of one short-edge shaft wall, and a reaction force combination wall panel is arranged at the lower part of the other short-edge shaft wall. A pipe jacking hole is arranged on the pipe hole wall panel, and conversion steel beams are arranged at the upper ends of the pipe hole wall panel and the reaction force combination wall panel.

5. The reusable pipe jacking caisson device according to claim 4, characterized in that, The hollow wall panel is made of steel plates into a box-shaped structure with openings at the upper and lower ends and closed on all sides. The inside of the hollow wall panel is separated by a number of first vertical partitions and a number of first horizontal partitions. First filling holes are opened on the first horizontal partitions, and the first filling holes are used for filling to increase the self-weight of the hollow wall panel.

6. The reusable pipe jacking caisson device according to claim 4, characterized in that, The pipe hole wall panel is made of steel plates into a box-shaped structure with openings at the upper and lower ends and closed on all sides. The inside of the pipe hole wall panel is separated by a number of second horizontal partitions. Second filling holes are opened on the second horizontal partitions, and the second filling holes are used for filling to increase the self-weight of the pipe hole wall panel; the reaction force combination wall panel is made of steel plates into a box-shaped structure with closed on all sides. The inside of the reaction force combination wall panel is separated by a number of second vertical partitions, and the inside of the reaction force combination wall panel is filled with concrete and cured to form.

7. The reusable pipe jacking caisson device according to claim 1 or 2, characterized in that, Inside the said shaft, there is an internal ring support for the shaft. The internal ring support for the shaft includes two long-side cross beams and two short-side cross beams. Adjacent long-side cross beams and short-side cross beams are connected by corner connectors. Between the inner walls of adjacent long-side cross beams and short-side cross beams, there are corner diagonal braces. Both ends of the corner diagonal braces are respectively connected to the inner walls of the long-side cross beams and the short-side cross beams through T-shaped connecting plates.

8. The reusable pipe jacking caisson device according to claim 1 or 2, characterized in that, The frame-shaped capping beam includes two long-side capping beams and two short-side capping beams. An L-shaped capping beam is arranged between adjacent long-side capping beams and short-side capping beams. Capping beam connecting plates are arranged on both sides of the long-side capping beams and the short-side capping beams. The capping beam connecting plates and the L-shaped capping beam are connected by a number of tie bolts. The frame-shaped capping beam and the shaft are connected by a number of tie bolts.

9. The reusable pipe jacking caisson device according to claim 1 or 2, characterized in that, The support frame includes two base beams embedded in the frame-shaped capping beam. At the upper ends of the two base beams, there are two support beams. At the upper ends of the two support beams, there are truss sheets. At the upper ends of the truss sheets, there is an upper chord track beam. The opposite ends of the two upper chord track beams are connected by truss struts.

10. The reusable pipe jacking caisson device according to claim 1 or 2, characterized in that, The jacking mechanism includes a number of jacks and adjustable jack supports. The adjustable jack supports include four frame columns. Adjacent frame columns are connected by a number of frame beams. A number of outrigger support beams are arranged on the outer sides of the frame columns. One jack is installed through two outrigger support beams on the same horizontal plane and fixed by a clamp; there is a backseat wall at the rear of the jacking mechanism.

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