CN215632972U - On-spot prefabricated tube coupling of super large section rectangle push pipe - Google Patents
On-spot prefabricated tube coupling of super large section rectangle push pipe Download PDFInfo
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- CN215632972U CN215632972U CN202121483520.4U CN202121483520U CN215632972U CN 215632972 U CN215632972 U CN 215632972U CN 202121483520 U CN202121483520 U CN 202121483520U CN 215632972 U CN215632972 U CN 215632972U
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Abstract
The utility model discloses an on-site prefabricated pipe joint of a rectangular jacking pipe with an oversized section, which is formed by pouring a steel bar framework and concrete, and comprises two long sides and two short sides, wherein the long sides are divided into a top plate and a bottom plate, and the short sides are side walls; the prestressed anchorage device, the prestressed duct positioning tenon, the steel pipe hoisting hole, the steel pipe grouting hole and the beam section grouting pipe are pre-embedded in the pipe section; three waterproof structures are arranged at the joints of the pipe joints; the steel pipe hoisting hole is cylindrical and is embedded in the top plate, the bottom plate and the side walls at two sides of the pipe joint, the outer end of the steel pipe hoisting hole is flush with the outer wall of the pipe joint, and the inner end of the steel pipe hoisting hole is arranged in the side wall of the pipe joint; the steel pipe grout pressing hole and the beam section grouting pipe are embedded in the top plate, the bottom plate and the side walls at the two sides and run through the wall thickness of the pipe section, the outer wall of the pipe section at the outer end is flush, and the inner end of the pipe section is flush with the inner wall of the pipe section; and pre-stressed ducts are respectively reserved on the top plate and the bottom plate of the pipe joint at equal intervals, hollow pre-stressed duct positioning tenons are arranged at two ends of each pre-stressed duct, and the pre-stressed anchor is pre-buried at one side, close to the jacking direction, of each pre-stressed duct positioning tenon.
Description
Technical Field
The utility model relates to the technical field of pipe jacking engineering, in particular to an ultra-large section rectangular pipe jacking on-site prefabricated pipe joint.
Background
As a trenchless engineering technology, the pipe jacking technology has become a main construction means of municipal engineering due to the advantages of small interference to urban traffic, higher civilized construction degree than slotting construction, good economic benefit and the like. Circular jacking pipes are mainly used in the early stage, and rectangular jacking pipes in the later stage are adopted by numerous projects due to the advantages of high section utilization rate, strong shallow earthing adaptability, wide project application range and the like, and are particularly most economical in municipal tunnel projects such as urban underground communication channels, cables, comprehensive pipe galleries and the like with rectangular sections.
At present, the production mode of the pipe jacking pipe joint has two modes of integral casting and pipe piece assembling. To assembled section of jurisdiction, the inside steadiness of tube coupling is connected often to be difficult to guarantee in super large section rectangle push pipe. The large-section rectangular jacking pipe often faces the problems of large transportation and installation difficulty and the like, so that the on-site prefabrication method for the pipe joint, which does not need to perform transportation outside the field and can meet the requirement of the construction period, is very necessary for the large-section rectangular jacking pipe.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of the prior art and provides an extra-large section rectangular pipe jacking on-site prefabricated pipe section which does not need off-site prefabricated transportation and can meet the requirement of a construction period.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:
a rectangular pipe section with an oversized section is a rectangular section pipe section formed by pouring a steel bar framework and concrete, and comprises two long sides and two short sides, wherein the long sides are divided into a top plate and a bottom plate, and the short sides are side walls; the prestressed anchorage device, the prestressed duct positioning tenon, the steel pipe hoisting hole, the steel pipe grouting hole and the beam section grouting pipe are pre-embedded in the pipe section; three waterproof structures are arranged at the joints of the pipe joints;
the hoisting hole is cylindrical, is pre-embedded at the top plate, the bottom plate and the side walls at two sides of the pipe joint before concrete is poured, the outer end of the hoisting hole is flush with the outer wall of the pipe joint, and the inner end of the hoisting hole is arranged inside the side wall of the pipe joint; the steel pipe grout pressing hole and the beam section grouting pipe are embedded in the top plate, the bottom plate and the side walls at the two sides and run through the wall thickness of the pipe section, the outer wall of the pipe section at the outer end is flush, and the inner end of the pipe section is flush with the inner wall of the pipe section; and pre-stressed ducts are respectively reserved on the top plate and the bottom plate of the pipe joint at equal intervals, hollow pre-stressed duct positioning tenons are arranged at two ends of each pre-stressed duct, and the pre-stressed anchor is pre-buried at one side, close to the jacking direction, of each pre-stressed duct positioning tenon.
Specifically, the first waterproof structure comprises a socket joint arranged at the joint of the pipe joints, a joint steel sleeve ring is closely attached to a concrete structure at the socket, and two wedge-shaped water stop sealing rings and one steel ring are arranged between the joint steel sleeve ring and the socket concrete; a steel pipe grouting hole is formed in front of the first wedge-shaped water stopping sealing ring, a water stopping steel ring is arranged in the middle of the grouting hole, the bottom of the grouting hole is blocked by an outer square pipe plug, and C20 fine stone concrete is used for blocking after water stopping and grouting are finished; be equipped with the concrete locating piece between two wedge stagnant water sealing washer, the locating piece has notes polyurethane preformed hole, and the locating piece breaks off in preformed hole department, and the hole bottom adopts outer square pipe plug and outsourcing C20 pea gravel concreten to carry out the shutoff.
The second waterproof structure comprises a groove formed in the middle upper part of the pipe wall of the female end of the pipe joint, and an elastic sealing gasket embedded in the groove, wherein the elastic sealing gasket is composed of water expansion rubber and chloroprene rubber; pouring low-modulus polyurethane sealant into a caulking groove formed between the pipe joint and the steel sleeve ring; a water-swelling rubber strip is embedded between the two round ribs on the steel sleeve ring, so that a closed round ring is formed.
Specifically, the third waterproof structure comprises a liner made of medium-hardness wood material plywood, wherein pipe joints are connected in a tongue-and-groove mode; the bottom of the plywood is sealed by a polyethylene film, and the caulking groove at the lower part of the pipe joint is filled by high-modulus polyurethane sealant; two steel rings are respectively arranged on two sides of the high-modulus polyurethane sealant; and a stainless steel water receiving box with the thickness of 1mm is arranged on the top plate at the deformation joint.
Specifically, the steel bar framework comprises an inner main bar, an outer main bar and a stirrup; the inner main reinforcement is close to the inner wall of the pipe joint, the outer main reinforcement is close to the outer wall of the pipe joint, the inner main reinforcement and the outer main reinforcement are hooped by stirrups at four corners of the pipe joint, and the stirrups and the main reinforcements are firmly welded in a crossed mode through spot welding.
Preferably, the wedge-shaped water stop sealing ring is composed of water expansion rubber and chloroprene rubber and is adhered to the base surface of the pipe joint by an adhesive; the steel sleeve ring and the steel ring are made of 16Mn steel, epoxy zinc-rich primer is adopted for second degree, 30u per degree, epoxy asphalt finish paint is adopted for second degree, 80u per degree, the inner side of the steel sleeve ring joint is ground flat, and the inner ring steel ring is made of 10PCuXt abrasion-resistant copper.
Has the advantages that:
aiming at the problems of heavy self weight and difficult transportation and installation of the rectangular pipe jacking joint with the oversized section, the utility model provides a site prefabricated pipe joint structure of the rectangular pipe jacking joint with the oversized section for the project without off-site prefabricated transportation conditions, reduces the transportation links of the pipe joint, ensures the timely supply of the pipe joint during jacking construction, and meets the requirement of the construction period; compared with an assembly type pipe joint, the pipe joint is formed by integral pouring, and the integral stability and the sealing performance of the structure are guaranteed.
Drawings
The foregoing and/or other advantages of the utility model will become further apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings.
FIG. 1 is a cross-sectional reinforcing bar diagram of a pipe joint.
Fig. 2 is a cross-sectional view of a pipe section.
Fig. 3 is a top plan view of the pipe section.
Fig. 4 is a side elevational view of a pipe section.
Fig. 5 is a water-proof construction diagram of the pipe joint.
Fig. 6 is a large drawing of a wedge-shaped water stop sealing ring with a first waterproof structure.
Fig. 7 is a schematic view of the second waterproof structure elastic gasket.
Fig. 8 is a big sample of a water-swelling rubber strip between two round ribs of a third waterproof structural steel lantern ring.
Description of reference numerals: 1-a steel reinforcement framework; 2-hooping; 3-inner main reinforcement; 4-outer main ribs; 5-a prestressed anchorage device; 6-prestressed duct locating tenon; a steel pipe hoisting hole with 7-phi 140 mm; 8-DN25 steel tube pressure grouting hole; 9-two inch beam joint grouting pipe; 10-other embedded parts according to the use function requirements of the tunnel; 11-a steel collar; 12-wedge-shaped water stop sealing rings; 13-a steel ring with the outer diameter of 30mm and the thickness of 8 mm; 14-water swellable rubber; 15-neoprene; 16-water stop steel ring with outer diameter of 100 and thickness of 4 mm; 17-outer square pipe blocking; 18-C20 fine stone concrete; 19-a concrete positioning block; 20-injecting a polyurethane preformed hole; 21-an elastic sealing gasket; 22-low modulus polyurethane sealant; 23-round ribs; 24-plywood; 25-polyethylene film; 26-high modulus polyurethane sealant; 27-steel ring with outer diameter of 100mm and thickness of 10 mm; 28-stainless steel water receiving box; 29-soil nailing.
Detailed Description
The utility model will be better understood from the following examples.
The structures, proportions, and dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the skilled in the art. In addition, the terms "upper", "lower", "front", "rear" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.
As shown in figure 1, the on-site prefabricated pipe joint of the rectangular jacking pipe with the ultra-large section is a rectangular section pipe joint formed by pouring a steel bar framework 1 and concrete, and comprises two long sides and two short sides, wherein the long sides are divided into a top plate and a bottom plate, and the short sides are side walls. The steel reinforcement framework comprises an inner main reinforcement 3, an outer main reinforcement 4 and a stirrup 2. Interior owner muscle 3 is close to the tube coupling inner wall, and outer owner muscle 4 is close to the tube coupling outer wall, and in main muscle and outer main muscle are banded with stirrup 2 in four bights of tube coupling, it is firm to adopt alternately spot welding between stirrup and the main muscle.
As shown in fig. 2 to 4, a prestressed anchorage device 5, a prestressed duct positioning tenon 6, a steel pipe hoisting hole 7 with the diameter of 140mm, a steel pipe grouting hole 8 of DN25 and a two-inch beam section grouting pipe 9 are pre-buried in the prefabricated pipe section; the joint of the pipe joint is provided with three waterproof structures. The hoisting holes 7 are cylindrical pipes, are embedded in the top plate, the bottom plate and the side walls at two sides of the pipe joint before concrete is poured, the outer ends of the hoisting holes are flush with the outer wall of the pipe joint, and the inner ends of the hoisting holes are arranged in the side walls of the pipe joint; the steel pipe grout pressing hole 8 and the beam section grouting pipe 9 are embedded in the side walls of the top plate, the bottom plate and the two sides and run through the wall thickness of the pipe section, the outer wall of the pipe section at the outer end is flush, and the inner end of the pipe section is flush with the inner wall of the pipe section; and pre-stressed ducts are respectively reserved on the top plate and the bottom plate of the pipe joint at equal intervals, hollow pre-stressed duct positioning tenons 6 are arranged at two ends of each pre-stressed duct, and the pre-stressed anchor 5 is pre-embedded at one side, close to the jacking direction, of each pre-stressed duct positioning tenon 6.
The production mode of the rectangular jacking pipe joint with the oversized section and the field prefabricating construction is as follows: the pipe section prefabricating construction site is arranged on the north side of the starting working well, and finished pipe sections are hoisted in the site without transportation outside the site; installing a steel reinforcement framework 1: firstly, placing stirrups 2 according to the positioning clamps, then placing main reinforcements 3 and outer main reinforcements 4 in the upper and lower layers, spot-welding the main reinforcements and the stirrups to firmly form a framework, finally placing outer-layer and inner-layer reinforcements on the steel pipe frame, placing all the reinforcements, and then adopting CO2The protective welding machine is used for welding and reinforcing the formed steel reinforcement cage, the stirrups and the main reinforcements are firmly welded through cross spot welding, and the whole framework is separated from the positioning seat by the crane after being formed.
After the pipe joint steel mould base and the inner mould are installed in place, the steel lantern ring 11 and the steel reinforcement framework 1 are hoisted, and embedded parts are installed, wherein the embedded parts comprise an embedded prestressed anchorage device 5, a prestressed duct positioning tenon 6, a phi 140mm steel pipe hoisting hole 7, a DN25 steel pipe grouting hole 8, a two-inch beam section grouting pipe 9 and other embedded parts 10 according to the use function requirements of the tunnel.
The prestressed anchorage device 5 is pre-embedded at one side of the positioning tenon close to the jacking direction, applies prestress to the prestressed steel bundles in the tensioned module, improves the bending resistance and longitudinal rigidity of the pipe joints, delays the time of crack occurrence, enhances the durability of the pipe joints, can avoid loose adhesion force between adjacent pipe joints after the top force of the pipe joints is cancelled, and avoids the leakage phenomenon from generating and causing construction quality problems; a phi 140mm steel pipe hoisting hole 7 is a reserved hole position for hoisting a rear pipe joint finished product; during jacking construction of the pipe joint, antifriction grouting is performed through DN25 steel pipe grout pressing holes 8, and jacking resistance is reduced; when the jacking of the pipe joints is finished, the slurry is replaced through the two-inch beam joint grouting pipe 9, so that the ground settlement is reduced; other embedded parts required by the use function of the tunnel are arranged on the inner wall of the pipe joint, and the outer end surface slightly protrudes out of the surface of the inner wall of the pipe joint, so that the embedded parts are reserved for welding of later-stage tunnel interior decoration brackets.
After the outer die of the pipe joint steel die is installed, concrete is poured; combining the characteristics of large weight and tight construction period of the rectangular duct piece with the oversized section, a pedestal method production process of a fixed die with an inserted vibrator is adopted; the strength grade of the pipe joint concrete is C50, and the impermeability grade is P8; and curing the pipe joints by steam and demolding.
The waterproof structure before leaving the factory of the pipe joint is arranged at the joint of the pipe joint and is of a bell and spigot structure, and comprises three F-shaped waterproof system joints, as shown in figure 5.
The first waterproof structure comprises a pipe joint seam, a socket joint is arranged, a joint steel sleeve ring 11 is closely attached to a concrete structure at a socket, two wedge-shaped water stop sealing rings 12 and a steel ring 13 with the outer diameter of 30mm and the thickness of 8mm are arranged between the joint steel sleeve ring 11 and the socket concrete; the wedge-shaped water stop sealing ring is composed of water expansion rubber 14 and chloroprene rubber 15, and is adhered to the base surface of the pipe joint by an adhesive, as shown in fig. 6; the steel sleeve ring and the steel ring are made of 16Mn steel, epoxy zinc-rich primer is adopted for second degree, 30u per degree, epoxy asphalt finish paint is adopted for second degree, 80u per degree, the inner side of the steel sleeve ring joint is ground flat, and the inner ring steel ring is made of 10PCuXt abrasion-resistant copper; when the pipe jacking machine jacks, the wedge-shaped water stop sealing ring is tightly attached to the steel sleeve ring, so that a waterproof effect is achieved; a steel pipe grout pressing hole 8 is formed in front of the first wedge-shaped water stop sealing ring, a water stop steel ring 16 with the outer diameter of 100mm and the thickness of 4mm is arranged in the middle of the grout pressing hole, the bottom of the grout pressing hole 8 is blocked by an outer pipe plug 17, and C20 fine aggregate concrete 18 is used for blocking after water stop and grout pressing are finished; a concrete positioning block 19 is arranged between the two wedge-shaped water stop sealing rings, a polyurethane injection preformed hole 20 is arranged below the positioning block 19, the positioning block is disconnected at the preformed hole, and the bottom of the hole is blocked by an outer square pipe plug 17 and an outer C20 fine stone concrete 18.
The second waterproof structure comprises a groove formed in the middle upper part of the pipe wall of the female end of the pipe joint, an elastic sealing gasket 21 is embedded and clings to the end surface of the socket of the pipe joint, and the purpose of sealing and waterproofing is achieved; the elastic sealing gasket is composed of water-swelling rubber 14 and chloroprene rubber 15, as shown in fig. 7; the caulking groove formed between the pipe joint and the steel sleeve ring is filled with the low-modulus polyurethane sealant 22, so that the waterproof effect between the steel sleeve ring and the concrete can be ensured; the water-swelling rubber strip 14 is inserted between the two round ribs 23 on the steel collar, thereby forming a closed round ring, as shown in fig. 8.
The third waterproof structure: in order to prevent the pipe joints from being damaged in construction, the middle-hardness wood material plywood 24 is used as a liner between the pipe joints, the plywood can generate certain plastic deformation to compensate the unevenness of the pipe ends in the jacking process, and the joints of the plates are connected in a tongue-and-groove mode; the bottom of the plywood is sealed by a polyethylene film 25, and the caulking groove at the lower part of the pipe joint is filled by high-modulus polyurethane sealant 26; two sides of the high-modulus polyurethane sealant 26 are respectively provided with a steel ring 27 with the outer diameter of 100mm and the thickness of 10 mm; a stainless steel water receiving box 28 with the thickness of 1mm is installed on a top plate at a deformation joint and fixed in an installation groove at the distance of 30cm by using soil nails 29, the water receiving box is installed to be straight, and two ends of the top plate water receiving box and the side wall water receiving box are welded into a whole so that leakage cannot occur.
The utility model provides a thought and a method for on-site prefabricating a pipe joint of a rectangular jacking pipe with an oversized cross section, and a method and a way for realizing the technical scheme are numerous. All the components not specified in the present embodiment can be realized by the prior art.
Claims (6)
1. The on-site prefabricated pipe joint for the rectangular jacking pipe with the oversized section is characterized by being formed by pouring a steel bar framework and concrete and comprising two long sides and two short sides, wherein the long sides are divided into a top plate and a bottom plate, and the short sides are side walls; the prestressed anchorage device, the prestressed duct positioning tenon, the steel pipe hoisting hole, the steel pipe grouting hole and the beam section grouting pipe are pre-embedded in the pipe section; three waterproof structures are arranged at the joints of the pipe joints;
the steel pipe hoisting hole is cylindrical, is pre-embedded at the top plate, the bottom plate and the side walls at two sides of the pipe joint before concrete is poured, the outer end of the steel pipe hoisting hole is flush with the outer wall of the pipe joint, and the inner end of the steel pipe hoisting hole is arranged inside the side wall of the pipe joint; the steel pipe grout pressing hole and the beam section grouting pipe are embedded in the top plate, the bottom plate and the side walls at the two sides and run through the wall thickness of the pipe section, the outer wall of the pipe section at the outer end is flush, and the inner end of the pipe section is flush with the inner wall of the pipe section; and pre-stressed ducts are respectively reserved on the top plate and the bottom plate of the pipe joint at equal intervals, hollow pre-stressed duct positioning tenons are arranged at two ends of each pre-stressed duct, and the pre-stressed anchor is pre-buried at one side, close to the jacking direction, of each pre-stressed duct positioning tenon.
2. The on-site prefabricated pipe joint of the ultra-large section rectangular pipe-jacking according to claim 1, wherein the first waterproof structure comprises a socket joint arranged at the joint of the pipe joint, a joint steel bushing ring is closely attached to a concrete structure at the socket, and two wedge-shaped water-stopping sealing rings and one steel ring are arranged between the joint steel bushing ring and the socket concrete; a steel pipe grouting hole is formed in front of the first wedge-shaped water stopping sealing ring, a water stopping steel ring is arranged in the middle of the grouting hole, the bottom of the grouting hole is blocked by an outer square pipe plug, and C20 fine stone concrete is used for blocking after water stopping and grouting are finished; be equipped with the concrete locating piece between two wedge stagnant water sealing washer, the locating piece has notes polyurethane preformed hole, and the locating piece breaks off in preformed hole department, and the hole bottom adopts outer square pipe plug and outsourcing C20 pea gravel concreten to carry out the shutoff.
3. The on-site prefabricated pipe joint of the ultra-large section rectangular jacking pipe as claimed in claim 2, wherein the second waterproof structure comprises a groove formed in the middle upper part of the pipe wall at the female end of the pipe joint, and an elastic sealing gasket embedded in the groove, wherein the elastic sealing gasket is composed of water-swelling rubber and chloroprene rubber; pouring low-modulus polyurethane sealant into a caulking groove formed between the pipe joint and the steel sleeve ring; a water-swelling rubber strip is embedded between the two round ribs on the steel sleeve ring, so that a closed round ring is formed.
4. The on-site prefabrication pipe joint of the ultra-large section rectangular jacking pipe according to claim 3, wherein the third waterproof structure comprises a liner made of medium-hardness wood material plywood, and the pipe joints are connected in a tongue-and-groove manner; the bottom of the plywood is sealed by a polyethylene film, and the caulking groove at the lower part of the pipe joint is filled by high-modulus polyurethane sealant; two steel rings are respectively arranged on two sides of the high-modulus polyurethane sealant; and a stainless steel water receiving box with the thickness of 1mm is arranged on the top plate at the deformation joint.
5. The on-site prefabricated pipe joint for the ultra-large section rectangular jacking pipe as claimed in claim 1, wherein the steel reinforcement framework comprises an inner main reinforcement, an outer main reinforcement and a stirrup; the inner main reinforcement is close to the inner wall of the pipe joint, the outer main reinforcement is close to the outer wall of the pipe joint, the inner main reinforcement and the outer main reinforcement are hooped by stirrups at four corners of the pipe joint, and the stirrups and the main reinforcements are firmly welded in a crossed mode through spot welding.
6. The on-site prefabricated pipe joint of the ultra-large section rectangular jacking pipe as claimed in claim 2, wherein the wedge-shaped water-stop sealing ring is composed of water-swelling rubber and chloroprene rubber, and is adhered to the base surface of the pipe joint by an adhesive; the steel sleeve ring and the steel ring are made of 16Mn steel, epoxy zinc-rich primer is adopted for second degree, 30u per degree, epoxy asphalt finish paint is adopted for second degree, 80u per degree, the inner side of the steel sleeve ring joint is ground flat, and the inner ring steel ring is made of 10PCuXt abrasion-resistant copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121483520.4U CN215632972U (en) | 2021-07-01 | 2021-07-01 | On-spot prefabricated tube coupling of super large section rectangle push pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121483520.4U CN215632972U (en) | 2021-07-01 | 2021-07-01 | On-spot prefabricated tube coupling of super large section rectangle push pipe |
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| Publication Number | Publication Date |
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| CN215632972U true CN215632972U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121483520.4U Active CN215632972U (en) | 2021-07-01 | 2021-07-01 | On-spot prefabricated tube coupling of super large section rectangle push pipe |
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| CN (1) | CN215632972U (en) |
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2021
- 2021-07-01 CN CN202121483520.4U patent/CN215632972U/en active Active
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