CN211976106U - Pipe jacking interface structure capable of improving longitudinal rigidity - Google Patents
Pipe jacking interface structure capable of improving longitudinal rigidity Download PDFInfo
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- CN211976106U CN211976106U CN202020341655.6U CN202020341655U CN211976106U CN 211976106 U CN211976106 U CN 211976106U CN 202020341655 U CN202020341655 U CN 202020341655U CN 211976106 U CN211976106 U CN 211976106U
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Abstract
The utility model discloses an improve push pipe interface structure of longitudinal rigidity. The rubber sealing ring comprises a steel bell mouth, a spigot, a retaining steel ring, a wedge-shaped sealing rubber ring, water-swelling rubber, a wood gasket, sealing paste and a bell mouth anchor bar; the steel plate also comprises an embedded steel member and a batten plate; the batten plates and the embedded steel members are uniformly distributed on the inner side of the top pipe joint, and the inner surfaces of the batten plates and the embedded steel members are consistent with the inner surface of the top pipe joint; the embedded steel member is connected with the pipe joint of the jacking pipe through an embedded rib; the pre-buried steel member is welded with the batten plate. The utility model has the advantages of increase the longitudinal rigidity of push pipe interface to improve the security that the push pipe structure connects during construction and operation.
Description
Technical Field
The utility model relates to a push pipe engineering technical field, the more specifically push pipe interface structure who says so it improves longitudinal rigidity.
Background
With the rapid development of various municipal pipe jacking projects, the geological environment in which the various municipal pipe jacking projects are located is more and more complex, and the requirement on water stop of the pipe jacking structure interface is higher and higher. Particularly, when the water-stopping pipe penetrates through soft and hard uneven sections such as soft soil and sandy soil, the stratum has the characteristics of high compressibility, strong permeability and the like, and the water-stopping effect of the top pipe joint directly influences the success or failure of the project.
The joint water stop of the reinforced concrete roof pipe structure generally adopts a steel bell mouth or a double-socket joint, and the joint water stop needs to meet the waterproof requirements during construction and operation.
According to the technical regulations on jacking pipes for water supply and drainage projects (CECS246:2008) and the standards on jacking pipe construction technology and acceptance (trial), the reinforced concrete jacking pipe with the double-spigot interface is not suitable for sandy soil strata. When a sandy soil stratum is met, a steel bell mouth interface is mostly adopted, namely, the front half of the steel bell mouth is embedded into the concrete pipe, and a water-swelling rubber water stop ring is arranged at the position for preventing the joint surface of the steel bell mouth and the concrete pipe from leaking. After the water-swelling rubber water stop ring meets water, the volume can swell by 1-3 times, and water is stopped by the rubber ring between the front and rear jacking pipes.
In a soft soil or sandy soil stratum rich in underground water, the pipe jacking interface adopts an F-shaped steel bellmouth interface of a sealing rubber ring, which is a common practice of various pipe jacking projects at present, and is shown in figure 1.
The F-shaped steel bellmouth is mainly stopped by the rubber ring after extrusion, a force transferring liner such as a wood cushion plate is arranged between the front pipe joint and the rear pipe joint, and after the push bench is out of the hole, the pipe joints close to the push bench are loosened and separated in the original compaction state due to the sudden drop of the water and soil pressure of the tunnel face of the push bench, so that the leakage of the joint is caused, as shown in figure 1; in addition, after the pipe jacking project in the stratum with uneven hardness is completed, the stratum is unevenly settled due to external factors such as precipitation and ground loading of the surrounding environment of the project, the longitudinal rigidity of the F-shaped steel bell mouth is weak, uneven longitudinal settlement is generated in the later period, deformation and leakage between the joints are caused, and the steel bell mouth and the originally connected pipe joint can fall off when the deformation is serious, as shown in fig. 2.
Therefore, there is a need to develop a push bench interface that increases the longitudinal stiffness of the push bench interface.
Disclosure of Invention
The utility model aims at providing a pipe jacking interface structure for improving the longitudinal rigidity, which increases the longitudinal rigidity of the pipe jacking interface by welding pre-embedded steel members additionally arranged between each pipe jacking pipe joint through the batten plate, thereby improving the safety of the pipe jacking structure joint during construction and operation; the method is suitable for pipe jacking engineering under the condition of complex geological environment.
In order to realize the purpose, the technical scheme of the utility model is that: the pipe jacking interface structure for improving the longitudinal rigidity comprises a steel bell mouth, a spigot, a retaining steel ring, a wedge-shaped sealing rubber ring, water-swelling rubber, a wood gasket, sealing paste and a bell mouth anchor bar;
the method is characterized in that: the steel plate also comprises an embedded steel member and a batten plate;
the batten plates and the embedded steel members are uniformly arranged on the inner side of the top pipe joint, and the inner surfaces of the batten plates and the embedded steel members are consistent with the inner surface of the top pipe joint;
the embedded steel member is connected with the pipe joint of the jacking pipe through an embedded rib;
the pre-buried steel member with the batten plate welded connection.
In the technical scheme, the embedded steel members and the embedded bars are welded in a T shape.
In the technical scheme, a plurality of embedded steel members are provided; the batten plate is provided with a plurality of batten plates;
the thickness of the batten plate is 10mm, the length of the batten plate in the axial direction of the pipe joint is 300mm, and the length of the batten plate perpendicular to the axial direction of the pipe joint is 200 mm.
In the technical scheme, a welding seam is arranged at the welding position of the embedded steel member and the batten plate; the height of the welding seam is 8 mm.
In the above technical scheme, the embedded ribs include straight embedded ribs and bent embedded ribs;
the directly-buried steel bar is perpendicular to the embedded steel member;
the bent embedded ribs are Z-shaped; the middle part of the bent embedded rib forms an axial included angle with the pipe joint, and the two ends of the bent embedded rib are parallel to the axial direction of the pipe joint of the jacking pipe;
one end of the bent embedded rib is located above the embedded steel member in parallel and is connected with the directly-embedded rib.
In the above technical solution, the pipe-jacking pipe joint comprises a front pipe joint and a rear pipe joint;
the wood liner is positioned at the joint of the front pipe joint and the rear pipe joint;
the sealing paste is positioned at two ends of the wood pad and at the joint of the front pipe joint and the rear pipe joint.
In the technical scheme, the embedded steel members comprise a front pipe joint embedded steel member and a rear pipe joint embedded steel member;
the front pipe joint embedded steel member is arranged on the inner side of the front pipe joint;
the rear pipe joint embedded steel member is arranged on the inner side of the rear pipe joint;
the front pipe joint pre-buried steel members are connected with the rear pipe joint pre-buried steel members through the batten plates in a welded mode.
In the above technical solution, the insertion openings are provided on the outer walls of the front pipe joint and the rear pipe joint;
the steel bell mouth, the retaining steel ring, the wedge-shaped sealing rubber ring and the water-swelling rubber are all positioned in the socket;
the backstop steel ring is positioned between the wood liner and the wedge-shaped sealing rubber ring;
the water-swellable rubber is positioned above the bellmouth anchor bars;
the steel bellmouth is located meet water inflation rubber, sealing paste, wooden packing, stopping steel ring and wedge sealing rubber circle upper end.
The utility model has the advantages of as follows:
(1) the utility model increases the longitudinal rigidity of the pipe-jacking interface by welding the batten plate with the embedded steel members additionally arranged between the pipe joints of each pipe jacking, thereby improving the safety of the pipe-jacking structure joint during construction and operation; the method is suitable for pipe jacking engineering under the condition of complex geological environment;
(2) the utility model mainly solves the problems that after the pipe jacking project in the stratum with uneven hardness is finished, the deformation and the leakage between the interfaces are caused by the uneven settlement of the stratum around the project, and the falling off of the steel bell mouth and the originally connected pipe joint can be caused when the deformation is serious; therefore, the utility model increases the longitudinal rigidity of the pipe jacking interface by welding the batten plate with the embedded steel members additionally arranged between the pipe jacking joints, thereby improving the water stopping performance of the pipe jacking structure joint during construction and operation; in addition, after the push bench goes out of the tunnel, the push bench pipe joint near the push bench is loosened in the original compaction state due to the sudden drop of the soil and water pressure on the working face of the push bench, so that the joint is leaked; before the push bench goes out of the hole, the welding of the batten plate on the pipe joint is firm, so that the stress state of the pipe joint and the water stop rubber ring can be kept stable, and the deformation and the leakage of the water stop rubber ring are prevented; the utility model discloses simple structure, the construction is convenient, need not do any change to current steel mould, and the expense of increase is very little, and the lacing plate that increases moreover can neglect the influence of headroom in the overhead line.
Drawings
FIG. 1 is a schematic view of the stress on the tunnel face before the push pipe goes out of the tunnel in the prior art.
FIG. 2 is a diagram of interface displacement caused by differential settlement before and after a pipe jacking joint in the prior art.
FIG. 3 is a prior art top pipe joint interface diagram.
Fig. 4 is a conventional pipe jacking joint interface diagram. Figure 5 is the utility model discloses improve the push pipe tube coupling interface picture of longitudinal rigidity.
Figure 6 is the utility model discloses push pipe tube coupling interface welding expandes the picture.
FIG. 7 is a layout diagram of the cross section of the embedded steel members of the pipe jacking pipe joint being circular.
FIG. 8 is a layout diagram of the cross section of the embedded steel members of the pipe jacking pipe joint being rectangular.
In the figure, 1-front pipe joint, 2-rear pipe joint, 3-steel bell mouth, 4-spigot, 5-retaining steel ring, 6-wedge-shaped sealing rubber ring, 7-water-swelling rubber, 8-wood gasket, 9-sealant, 10-bell mouth anchor bar, 11-front pipe joint embedded steel member, 12-rear pipe joint embedded steel member, 13-batten plate, 14-welding seam, 15-straight embedded bar, 16-bending embedded bar, 17-embedded steel member, 18-top pipe joint and 19-embedded bar.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be clear and readily appreciated by the description.
With reference to the accompanying drawings: the pipe jacking interface structure for improving the longitudinal rigidity comprises a steel bellmouth 3, a spigot 4, a retaining steel ring 5, a wedge-shaped sealing rubber ring 6, water-swellable rubber 7, a wood gasket 8, sealing paste 9 and bellmouth anchor bars 10;
the bellmouth anchor bars 10 are positioned in the pipe joints 18 of the top pipe; the insertion opening 4 is positioned on the outer wall of the pipe joint 18 of the top pipe; the steel bell mouth 3, the retaining steel ring 5, the wedge-shaped sealing rubber ring 6 and the water-swelling rubber 7 are all positioned in the socket 4;
the wood pad 8 is positioned at the top ends of the front pipe joint 1 and the rear pipe joint 2, and the sealing paste 9 is positioned at two ends of the wood pad 8;
the steel plate also comprises an embedded steel member 17 and a batten plate 13;
the batten plate 13 is arranged on the inner side of the top pipe joint 18, and the inner surface of the batten plate is consistent with the inner surface of the top pipe joint 18; the batten plate is ensured to be closely attached to the pipe joint 18 of the top pipe;
the embedded steel member 17 is arranged on the inner side of the top pipe joint 18, and the inner surface of the embedded steel member is consistent with that of the top pipe joint 18; ensuring the close contact between the pre-buried steel member 17 and the pipe joint 18 of the jacking pipe; the embedded steel members are made of carbon steel Q235b, the thickness direction is 10mm, the length in the axial direction of the pipe joints is 200mm, the length perpendicular to the axial direction of the pipe joints is 200mm, the embedded steel members can be uniformly distributed on the inner sides of the pipe joints according to the size of the cross sections of the pipe joints, the size of the cross sections of the pipe joints can be reduced when the cross sections of the pipe joints are small, and the size of the cross sections of the pipe joints can be increased when the cross sections of the pipe joints are large;
the cross section of the top pipe joint is generally circular or rectangular, the planar shapes of the pre-buried steel member and the batten plate need to be adjusted according to the cross section of the top pipe joint, if the top pipe joint is a circular pipe joint, the pre-buried steel member and the batten plate are arc-shaped, and if the top pipe joint is a rectangular pipe joint, the pre-buried steel member and the batten plate are straight lines (as shown in fig. 7 and 8);
the embedded steel member 17 is connected with the pipe joint 18 of the jacking pipe through embedded ribs 19; four pre-embedded bars are arranged on each pre-embedded steel member, the specification of the pre-embedded bars is HPB300 or HRB400, the diameter is 12mm, and the spacing is 150 multiplied by 200 mm;
the embedded steel members 17 are welded to the gusset plate 13 (as shown in fig. 5 and 6), so that the longitudinal rigidity between pipe joints is enhanced.
Furthermore, T-shaped welding is adopted between the embedded steel member 17 and the embedded ribs 19, and pressure submerged arc welding is adopted to enhance the connection between the embedded steel member 17 and the pipe joints 18 of the jacking pipes.
Further, there are a plurality of the embedded steel members 17; the longitudinal rigidity of the pipe jacking interface is increased;
the number of the batten plates 13 is multiple, and the batten plates 13 are uniformly arranged on the inner side of the top pipe joint 18; the embedded steel members at the inner sides of the front pipe section and the rear pipe section are welded and connected by batten plates, so that the longitudinal rigidity between the pipe sections is enhanced;
the thickness of the batten plate 13 is 10mm, the length along the axial direction of the pipe joint is 300mm, and the length perpendicular to the axial direction of the pipe joint is 200 mm; the batten plate can be uniformly arranged on the inner side of the pipe joint according to the size of the section of the pipe joint, such as 4-12 and the like, the section of the pipe joint can be small when the section of the pipe joint is small, and the section of the pipe joint can be large when the section of the pipe joint is large.
Further, a welding seam 14 is arranged at the welding position of the embedded steel member 17 and the gusset plate 13; the height of the welding seam 14 is 8mm, and the connecting requirement between the steel member 17 and the gusset plate 13 is met.
Further, the embedded ribs 19 comprise straight embedded ribs 15 and bent embedded ribs 16;
the straight embedded ribs 15 are perpendicular to the embedded steel members 17;
the bent embedded ribs 16 are Z-shaped; the middle part of the bent embedded rib 16 forms an axial included angle of 30 degrees with the pipe joint, and the two ends of the bent embedded rib are parallel to the axial direction of the top pipe joint 18 (as shown in fig. 5); the length meets the structural requirements of concrete structure design specifications; meets the construction requirements of the embedded ribs 19.
Further, the top pipe joint 18 comprises a front pipe joint 1 and a rear pipe joint 2;
the wood pad 8 is positioned at the joint of the front pipe joint 1 and the rear pipe joint 2;
the sealing paste 9 is positioned at two ends of the wood pad 8 and at the joint of the front pipe joint 1 and the rear pipe joint 2 (as shown in fig. 5); and the waterproof requirements during construction and operation are met.
Further, the embedded steel members 17 include a front pipe section embedded steel member 11 and a rear pipe section embedded steel member 12;
the front pipe joint embedded steel member 11 is arranged on the inner side of the front pipe joint 1;
the rear pipe joint embedded steel member 12 is arranged on the inner side of the rear pipe joint 2;
the front pipe section embedded steel members 11 and the rear pipe section embedded steel members 12 are connected through the gusset plates 13 in a welding manner (as shown in fig. 5 and 6); after the construction of the pipe jacking structure is completed, the embedded steel members on the inner sides of the front pipe joint and the rear pipe joint are welded and connected through batten plates with the thickness of 10mm, and the longitudinal rigidity between the pipe joints is enhanced.
Furthermore, the inserting holes 4 are respectively arranged on the outer walls of the front pipe joint 1 and the rear pipe joint 2;
the steel bell mouth 3, the retaining steel ring 5, the wedge-shaped sealing rubber ring 6 and the water-swelling rubber 7 are all positioned in the socket 4;
the retaining steel ring 5 is positioned between the wood liner 8 and the wedge-shaped sealing rubber ring 6;
the water-swellable rubber 7 is positioned above the bellmouth anchor bars 10;
the steel bell mouth 3 is positioned at the upper ends of the water-swelling rubber 7, the sealing paste 9, the wood gasket 8, the non-return steel ring 5 and the wedge-shaped sealing rubber ring 6 (as shown in figure 5); and the waterproof requirements during construction and operation are met.
Referring to fig. 5 and 6, it can be known that: improve pipe jacking interface structure's of longitudinal rigidity construction method, divide into two stages: a pipe joint prefabricating stage and a pipe joint assembling stage;
the method comprises the following steps: pipe section prefabricating stage
The embedded ribs and the steel members are combined, and the pipe sections of the jacking pipes are formed after concrete is poured;
when the pipe jacking pipe joint 18 with the embedded steel members 17 is prefabricated, the embedded steel members 17 are connected with the pipe jacking pipe joint 18 through embedded ribs 19; and the connection strength of the embedded steel member 17 and the pipe jacking joint 18 is enhanced.
Four embedded bars 19 are arranged on each embedded steel member 17; the embedded ribs 19 are respectively a direct embedded rib 15 and a bent embedded rib 16, and the lengths of the embedded ribs need to meet the structural requirements of concrete structure design specifications;
t-shaped welding is adopted between the embedded ribs 19 and the embedded steel members 17;
step two: and (3) pipe joint assembling:
after the pipe joints 18 of the jacking pipes are assembled, the joints adopt an F-shaped socket joint type, and the joint waterproof device adopts water-swelling rubber 7, a wedge-shaped sealing rubber ring 6 and bi-component polysulfide sealant 9 for caulking; the waterproof requirements during construction and operation are met;
after the pipe sections 18 of the jacking pipes are assembled and before the pipe pushing machine goes out of the tunnel, the pipe sections 18 of the jacking pipes in the range of about 20m near the pipe pushing machine are welded firmly by the batten plates 13, so that the jacking pipes are kept in the original compaction state;
after all the top pipe joints 18 are assembled in place, the remaining top pipe joints 18 are welded firmly by the gusset plates 13, so that the overall rigidity of all the top pipe joints 18 is improved.
Further, the prefabricated reinforced concrete pipe section in the factory: the strength grade is C50, the impermeability grade is P12, and the total consumption of the waterproof concrete cementing material is not less than 320kg/m3. The concrete raw material must also meet the relevant requirements of the design standard of the durability of the concrete structure. Before the pipe joint is produced, the steel die error is detected, and if the pipe joint is not in a standard, correction is needed. The die is also checked and maintained according to relevant regulations in the production process of the pipe joint; after the pipe joint is demoulded, marks representing production date, manufacturing numbers and the like which are not easy to be erased are printed at the easy-to-see positions of the pipe joint;
in the first step, pressure submerged arc welding is adopted between the embedded ribs 19 and the embedded steel members 17, and the height of a welding seam is 8 mm. E43XX type welding rods are adopted for HPB 300-grade steel bars, and E55XX type welding rods are adopted for HRB 400-grade steel bars;
the embedded steel member 17 and the gusset plate 13 are connected by full-length full welding, and the height of a welded seam is 8 mm.
In order to more clearly illustrate the advantages of the pipe jacking interface structure with improved longitudinal rigidity compared with the prior art, the two technical schemes are compared by the staff, and the comparison result is as follows:
according to last table, improvement longitudinal rigidity's push pipe interface structure compare with prior art, increase the longitudinal rigidity of push pipe interface through the batten plate, the stagnant water performance is better, can prevent to connect the seepage, need not change current steel mould, can neglect the influence of clearance in the push pipe.
Examples
Use now the utility model discloses it is right as the embodiment to quote in a certain track traffic line engineering certain station in Wuhan City the utility model discloses carry out the detailed description, right the utility model discloses quote in other push pipe engineering and have the guiding action equally.
The peripheral topography of the item of this embodiment is flatIn the I-stage land of the left bank of Yangtze river, a fourth series artificial accumulation layer (Q) is distributedml) And the fourth is a totally new system impulse layer (Q)4 al) Chalk-east lake group of the ancient line ((K-E) dn). Each stratum is respectively (1-1) miscellaneous fill, (3-1) clay, (3-2) silty clay, (3-5) silty clay, silty soil, silty sand interbedded, (4-1) silty sand, (4-2) silty fine sand and (15) conglomerate from top to bottom. The buried depth of the pipe jacking project is about 10m, the stratum in the excavation range is mainly (3-1) clay and (3-2) silty clay, and the maximum confined water head is 4m below the ground.
The top pipe interface structure for improving the longitudinal rigidity mainly comprises pre-buried steel members, batten plates and the like.
The material of pre-buried steel member is carbon steel Q235b, and the thickness direction is 10mm, is 200mm along the axial length of tube coupling, and the axial length of perpendicular to tube coupling is 200mm, and the pre-buried steel member is according to tube coupling section size, gets 4 ~ 12 dry evenly to be arranged in the tube coupling inboardly.
The embedded steel members are connected with the pipe joints of the jacking pipe through embedded ribs, each embedded steel member is provided with four embedded ribs, the specification of the embedded ribs is HPB300 or HRB400, the diameter is 12mm, and the distance is 150 multiplied by 200 mm. The embedded bars are respectively a direct-embedded bar and a bent embedded bar, the two embedded bars are respectively, the direct-embedded bar is perpendicular to the embedded steel members, the bent embedded bar is a bent steel bar, the axial included angle between the first section and the pipe joint is 30 degrees, the second section is axially parallel to the pipe joint, and the length meets the structural requirements of concrete structure design specifications.
T-shaped welding is adopted between the embedded ribs and the embedded steel members, pressure submerged arc welding is adopted, and the height of a welding seam is 8 mm. The embedded bar adopts HPB300 grade steel bar, and submerged arc welding adopts E43XX type welding rod.
After the construction of the pipe jacking structure is completed, the built-in steel members on the inner sides of the front pipe joint and the rear pipe joint are welded and connected through batten plates with the thickness of 10mm, the longitudinal rigidity between the pipe joints is enhanced, the height of a welding line is 8mm, and full-length welding is adopted.
The batten plate thickness is 10mm, and is 300mm along the axial length of tube coupling, and the axial length of perpendicular to tube coupling is 200mm, and the structure internal surface of pre-buried steel member keeps unanimous with the surface of batten plate promptly, guarantees to paste between batten plate and the pre-buried steel member closely.
4-12 batten plates are uniformly arranged on the inner side of the pipe joint according to the size of the section of the pipe joint.
The specific implementation of this embodiment is divided into two stages: the pipe joint prefabricating stage and the pipe joint assembling stage.
And (3) prefabricating the pipe joints: when the pipe joint with the embedded steel members is prefabricated, the embedded steel members are connected with the pipe joint of the jacking pipe through embedded ribs, four embedded ribs are arranged on each embedded steel member, the embedded ribs are directly embedded ribs and bent embedded ribs respectively, and the length of each embedded rib needs to meet the structural requirements of concrete structure design specifications. T-shaped welding is adopted between the embedded ribs and the embedded steel members, pressure submerged arc welding is adopted, and the height of a welding seam is 8 mm.
Prefabricating reinforced concrete pipe sections in factories: the strength grade is C50, the impermeability grade is P12, and the total consumption of the waterproof concrete cementing material is not less than 320kg/m3. The concrete raw material simultaneously meets the relevant requirements of 'design specification of durability of concrete structure'. And before the pipe joint is produced, detecting the error of the steel die. The mould is also inspected and maintained according to relevant regulations in the production process of the pipe joint. After the pipe joint is demoulded, marks representing production date, manufacturing numbers and the like which are not easy to be erased are printed at the position where the pipe joint is easy to see.
And (3) pipe joint assembling: after the duct pieces are assembled, the joints of the duct pieces are in an F-shaped socket joint type, and the joint waterproof device is caulked by water-swelling rubber, a wedge-shaped sealing rubber ring and double-component polysulfide sealant. After the pipe sections are assembled and before the pipe pushing machine goes out of the tunnel, the pipe sections of the pipe pushing machine, which are within the range of about 20m, near the pipe pushing machine are firmly welded by the batten plates, and after all the pipe sections are assembled in place, the rest pipe sections of the pipe pushing machine are firmly welded by the batten plates.
And (4) conclusion: in the embodiment, the pipe jacking interface structure with improved longitudinal rigidity is adopted, and the pre-embedded steel members additionally arranged among all the pipe jacking joints are welded through the batten plates, so that the longitudinal rigidity of the pipe jacking interface is improved, and the water stopping performance of the pipe jacking structure joint during construction and operation is improved; in the embodiment, before the push bench goes out of the hole, the batten plate on the pipe joint is firmly welded, so that the stress state of the pipe joint and the water stop rubber ring can be kept stable, and the deformation and leakage of the water stop rubber ring are prevented; the embodiment has simple structure and convenient construction, does not need to change the prior steel die, has little increased cost, and basically has no influence on the clearance in the top pipe by the increased batten plate.
Other parts not described belong to the prior art.
Claims (8)
1. The pipe jacking interface structure for improving the longitudinal rigidity comprises a steel bell mouth (3), a spigot (4), a non-return steel ring (5), a wedge-shaped sealing rubber ring (6), water-swelling rubber (7), a wood gasket (8), sealing paste (9) and a bell mouth anchor bar (10); the method is characterized in that: the steel plate also comprises an embedded steel member (17) and a batten plate (13);
the batten plates (13) and the embedded steel members (17) are both arranged on the inner side of the top pipe joint (18), and the inner surfaces of the batten plates and the embedded steel members are consistent with the inner surface of the top pipe joint (18);
the embedded steel members (17) are connected with the pipe joints (18) of the jacking pipes through embedded ribs (19);
the embedded steel members (17) are connected with the batten plates (13) in a welding mode.
2. The push pipe joint structure for improving longitudinal rigidity according to claim 1, wherein: the embedded steel members (17) and the embedded ribs (19) are welded in a T shape.
3. A push pipe joint structure for increasing longitudinal rigidity according to claim 1 or 2, wherein: a plurality of pre-buried steel members (17) are arranged; a plurality of the batten plates (13);
the thickness of the batten plate (13) is 10mm, the length in the axial direction of the pipe joint is 300-500 mm, and the length perpendicular to the axial direction of the pipe joint is 200-400 mm.
4. A push pipe joint structure for increasing longitudinal rigidity as claimed in claim 3, wherein: a welding seam (14) is positioned at the welding position of the embedded steel member (17) and the batten plate (13); the height of the welding seam (14) is 8-10 mm.
5. The push pipe joint structure for improving longitudinal rigidity according to claim 4, wherein: the embedded ribs (19) comprise straight embedded ribs (15) and bent embedded ribs (16);
the straight embedded ribs (15) are perpendicular to the embedded steel members (17);
the bent embedded ribs (16) are Z-shaped; the middle part of the bent embedded rib (16) forms an axial included angle of 30 degrees with the pipe joint, and the two ends of the bent embedded rib are parallel to the axial direction of the pipe joint (18) of the jacking pipe;
one end of the bent embedded rib (16) is located above the embedded steel member (17) in parallel and is connected with the straight embedded rib (15).
6. The push pipe joint structure for improving longitudinal rigidity according to claim 5, wherein: the pipe jacking joint (18) comprises a front pipe joint (1) and a rear pipe joint (2);
the wood pad (8) is positioned at the joint of the front pipe joint (1) and the rear pipe joint (2);
the sealing paste (9) is positioned at two ends of the wood gasket (8) and at the joint of the front pipe joint (1) and the rear pipe joint (2).
7. The push pipe joint structure for improving longitudinal rigidity according to claim 6, wherein: the embedded steel members (17) comprise front pipe joint embedded steel members (11) and rear pipe joint embedded steel members (12);
the front pipe joint embedded steel member (11) is arranged on the inner side of the front pipe joint (1);
the rear pipe joint embedded steel member (12) is arranged on the inner side of the rear pipe joint (2);
the front pipe joint pre-embedded steel members (11) are connected with the rear pipe joint pre-embedded steel members (12) through batten plates (13) in a welded mode.
8. The push pipe joint structure for improving longitudinal rigidity according to claim 7, wherein: the socket (4) is arranged on the outer walls of the front pipe joint (1) and the rear pipe joint (2);
the steel bell mouth (3), the retaining steel ring (5), the wedge-shaped sealing rubber ring (6) and the water-swelling rubber (7) are all positioned in the socket (4);
the retaining steel ring (5) is positioned between the wood gasket (8) and the wedge-shaped sealing rubber ring (6);
the water-swellable rubber (7) is positioned above the bellmouth anchor bars (10);
the steel bellmouth (3) is positioned at the upper ends of the water-swelling rubber (7), the sealing paste (9), the wood gasket (8), the retaining steel ring (5) and the wedge-shaped sealing rubber ring (6).
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| CN202020341655.6U CN211976106U (en) | 2020-03-18 | 2020-03-18 | Pipe jacking interface structure capable of improving longitudinal rigidity |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322458A (en) * | 2020-03-18 | 2020-06-23 | 长江勘测规划设计研究有限责任公司 | Pipe jacking interface structure for improving longitudinal rigidity and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111322458A (en) * | 2020-03-18 | 2020-06-23 | 长江勘测规划设计研究有限责任公司 | Pipe jacking interface structure for improving longitudinal rigidity and construction method thereof |
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