CN218990255U

CN218990255U - Prefabricated composite node suitable for small-size utility tunnel quick construction

Info

Publication number: CN218990255U
Application number: CN202222584112.9U
Authority: CN
Inventors: 杨京生; 吕志成; 李路路; 崔宇; 贺强强; 崔毅; 安志尧; 王冲; 冯运玲
Original assignee: Beijing Jingtou City Pipe Gallery Investment Co ltd; Beijing General Municipal Engineering Design and Research Institute Co Ltd
Current assignee: Beijing Jingtou City Pipe Gallery Investment Co ltd; Beijing General Municipal Engineering Design and Research Institute Co Ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2023-05-09
Anticipated expiration: 2032-09-29

Abstract

The prefabricated combined node is a prefabricated structure body and comprises an inspection port 13, a hoisting port 17, a connecting tongue-and-groove 6, an air duct 10 and a concrete prefabricated cover plate 19; the prefabricated combined node is prefabricated in a factory and assembled on site, so that the standard section and the node are fully prefabricated, and the purposes of full-line rapid construction and improvement of construction quality are achieved.

Description

Prefabricated composite node suitable for small-size utility tunnel quick construction

Technical Field

The utility model relates to the technical field of small comprehensive pipe racks, in particular to a prefabricated node structure which is rapid in construction, combined, intensified and standardized. In particular to a prefabricated combined node suitable for rapid construction of a small-sized comprehensive pipe rack.

Background

The small utility tunnel is mainly used for servicing end users and is used as a beneficial supplement for municipal pipeline corridor construction systems. The small comprehensive pipe rack generally adopts a shallow single cabin structure, is mainly suitable for road sections with shortage of underground space resources, is especially used for updating and reforming projects or newly built regional city branches mainly including old urban municipal branches/same-city/neighborhood roads, and can achieve the effects of improving quality and rapidly constructing under the conditions of narrow roads, tight construction period and shortage of investment. The small utility tunnel can be light according to operation safety and maintenance management requirement and set up affiliated facilities, and personnel access & exit, hoist and mount mouth, vent, pipeline branch mouth etc. oral area should intensive combination set up to reduce space occupation and promote the whole landscape in city.

The small-sized comprehensive pipe rack is designed to be tightly combined with the site situation, and the problems of small-space operation and the like are fully considered. On the premise of ensuring the safety quality, the construction method is rapid, the cost can be effectively reduced, the occupation period of resources such as personnel, materials, machinery and the like is shortened, and meanwhile, the influence on the life of residents can be reduced to the greatest extent. Based on the above, the process of adding the combined nodes by the small-sized comprehensive pipe rack prefabrication method can achieve the above objective and can achieve the optimal technical economy.

The utility tunnel prefabrication assembly technology in the prior art refers to a rapid green construction technology for prefabricating the structural main body of the small utility tunnel in a factory in a blocking or sectioning way under the construction conditions of open excavation, underground excavation or cover excavation and the like, and then transporting the prefabricated structural main body to the site for assembly. The utility tunnel prefabrication assembly technology is used as a green construction technology, has been promoted and developed in recent years in the whole country, and domestic common assembly type pipe gallery construction schemes mainly comprise full prefabrication assembly, block prefabrication assembly and block prefabrication assembly, and for a small utility tunnel, a full-section prefabrication assembly mode is generally adopted due to a small structural section. The prefabricated assembly engineering of pipe rack has been implemented at present in China, adopts standard section prefabrication and the cast-in-situ form of node mostly because utility tunnel node pattern is various be difficult for prefabricating.

However, for municipal branches, the same species of hu and neighborhood roads, land block service is more dense, and only standard segment prefabrication and node cast-in-situ are limited in construction period reduction and construction quality improvement. Therefore, the functions of each node of the small comprehensive pipe gallery are required to be combined, intensified and standardized, meanwhile, the integral prefabricated structural form of the node is developed, the working procedures of factory prefabrication, transportation, hoisting, field installation and standard section connection are formed, the constraint factors of prefabrication of the small comprehensive pipe gallery are opened, and the aim of full-line rapid construction is fulfilled.

Disclosure of Invention

The utility model provides a prefabricated combined node suitable for rapid construction of a small comprehensive pipe rack, which aims to solve the technical problems of long construction period and incapability of improving construction quality caused by node cast-in-situ.

The technical scheme of the utility model is as follows:

the prefabricated combined node is characterized by being a prefabricated structure body and comprises an inspection port 13, a hoisting port 17, a connecting tongue-and-groove 6, an air duct 10 and a concrete prefabricated cover plate 19;

the combined node 2 is a shaft surrounded by side walls, and the top and the bottom of the shaft are provided with integrally formed top plate and bottom plate sealing covers; on the horizontal plane, side walls at two ends of the shaft are provided with connecting rabbets 6 which are connected with the small pipe gallery standard section 1 and extend out of the shaft, and the inside of the connecting rabbets is communicated with the inside of the combined node; the well bore is provided with an outer expansion section 4 which is wider than two ends of the well bore in the middle, a gradually-retracted gradual change section 3 is arranged between the outer expansion section 4 and the two ends of the well bore, well bore side walls on two sides of the outer expansion section are arranged in parallel, and well bore side walls on two sides of the gradual change section are obliquely arranged in a splayed shape; in the vertical direction, the height of the combined node 2 is higher than that of a pipe gallery of the small pipe gallery standard section 1, wherein the section which is higher than the height of the small pipe gallery standard section is a raised section 5, a rigid waterproof sleeve 7, a galvanized seamless steel pipe II 9 and a galvanized seamless steel pipe I8 are pre-embedded on the side walls of the outer expansion sections at the two sides of the raised section, an air duct 10 is arranged on the side walls of a shaft of the gradual change section, and the top end of the air duct 10 is connected with an air pavilion or a blast cap 11;

the top plate is provided with a lifting opening 17 and an inspection opening 13; the inspection port 13 is provided with a 90-degree steel ladder stand 14 which is communicated with the inside of the node; and a plurality of lifting hooks 12 are uniformly distributed at the top plate and positioned on the side wall of the node.

The prefabricated combined node is suitable for rapid construction of a small-sized comprehensive pipe rack, wherein a prefabricated structural body of the combined node 2 is installed below the ground, a prefabricated shaft 15 is built at an inspection port 13, a well cover 16 is arranged at a well mouth of the prefabricated shaft, the ground is exposed, a concrete prefabricated cover plate 19 is covered at a hoisting port 17, an air inlet of an air duct 10 is exposed at the top end of the ground and is connected with a wind pavilion or a wind cap 11 on the ground, and the top plate is covered with soil to form an upper pavement structure.

The prefabricated combined node suitable for rapid construction of the small-sized comprehensive pipe rack is characterized in that the inspection port 13 and the hoisting port 17 are sequentially and longitudinally arranged in the middle of the top plate; and an upper reversing beam 18 is arranged at the opening part of the lifting opening 17.

A prefabricated combination node suitable for quick construction of small-size utility tunnel, wherein, roof department equipartition sets up 8 lifting hooks 12.

The prefabricated combined node is prefabricated in factories, assembled on site and quickly constructed. And after the integral prefabricated nodes are installed in place, the prefabricated shaft is built to install the well cover. An air duct is arranged to be connected with an air duct interface of the prefabricated structure body. The tail end of the air duct is provided with an air outlet pavilion or a hood on the ground, and the position of the air duct is flexibly laid according to road cross section arrangement and city design and is coordinated with surrounding landscapes. And after the pipeline is installed, covering a concrete prefabricated cover plate on the hoisting opening. And finally, covering soil to make an upper pavement structure.

The utility model has the following beneficial effects:

1) The prefabricated combined node is prefabricated in factories and assembled on site, so that the standard section and the node are fully prefabricated, and the purposes of full-line rapid construction and improvement of construction quality are achieved.

2) In a new urban area, municipal branches and partial secondary main roads are scaled, and the method is adopted under the road in combination with the requirement of planning municipal pipelines, so that the construction period can be greatly shortened, and the economic advantage of the prefabricated comprehensive pipe gallery after engineering is scaled can be realized.

3) In the urban updating and reforming project, the utility model can effectively shorten the construction period, reduce the occupation period of resources such as personnel, materials, machinery and the like, and simultaneously furthest reduce the influence on the life of residents.

4) The steel air duct is provided with the steel pipe, the steel-plastic composite pipe and the ball-milling cast iron pipe, and the implementation flexibility is high. The wind pavilion or the wind cap can be combined with the road transverse and current implementation conditions to determine the implementation position, and the appearance of the exposed ground opening is combined with the urban design to coordinate with the integral appearance of the city.

5) In practical application, the utility model can flexibly carry out the design and the size adjustment of the reserved and pre-buried pipeline according to the requirement of the pipeline in the corridor when the pipeline is prefabricated in a factory.

Drawings

FIG. 1 is a schematic top view of an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of 1-1 of FIG. 1;

FIG. 3 is a schematic cross-sectional view of 2-2 of FIG. 1;

FIG. 4 is a schematic diagram of a tongue and groove bulk sample;

FIG. 5 is a schematic view of a hook bulk;

figure number: 1-small pipe gallery standard section, 2-combined node, 3-gradual change section, 4-outward expansion section, 5-bulge section, 6-connection tongue-and-groove, 7-rigid waterproof sleeve, 8- (phi 150) galvanized seamless steel pipe I, 9- (phi 110) galvanized seamless steel pipe II, 10-air duct, 11-wind booth or blast cap, 12-lifting hook, 13-inspection port, 14-90 DEG steel cat ladder, 15-prefabricated shaft, 16-well cover, 17-lifting port, 18-upper reversing beam, 19-concrete prefabricated cover plate and A-ground.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings.

The following examples are given for the purpose of illustration only and are not intended to limit the embodiments of the utility model. Various other changes and modifications may be made by one of ordinary skill in the art in light of the following description, and such obvious changes and modifications are contemplated as falling within the spirit of the present utility model.

The specific implementation mode is as follows:

referring to fig. 1-3, the prefabricated combined node is a prefabricated structure body and comprises an inspection port 13, a hoisting port 17, a connecting tongue-and-groove 6, an air duct 10 and a concrete prefabricated cover plate 19, wherein the prefabricated combined node is suitable for rapid construction of a small comprehensive pipe rack;

referring to fig. 1-3, the combined node 2 is a shaft surrounded by side walls, and the top and bottom of the shaft are provided with integrally formed top and bottom plate covers for sealing the upper and lower openings; on the horizontal plane, side walls at two ends of the shaft are provided with connecting rabbets 6 which are connected with the small pipe gallery standard section 1 and extend out of the shaft, and the inside of the connecting rabbets is communicated with the inside of the combined node; referring to fig. 1, an outer expansion section 4 wider than two ends of the well is arranged in the middle of the well, a gradually-retracted gradual change section 3 is arranged between the outer expansion section 4 and the two ends of the well, namely, the middle section of a combined node is thicker than the two ends, two side well walls of the outer expansion section are arranged in parallel, and two side well walls of the gradual change section are obliquely arranged in a splayed shape; in the vertical direction, referring to the height of the combined node 2 shown in fig. 2, which is higher than the height of a pipe gallery of the small pipe gallery standard section 1, wherein the section which is higher than the height of the small pipe gallery standard section 1 is a raised section 5, a rigid waterproof sleeve 7, a phi 110 galvanized seamless steel pipe II 9 and a phi 150 galvanized seamless steel pipe I8 are pre-embedded in the side walls of the outer expansion sections at the two sides of the raised section, an air duct 10 is arranged on the side walls of a shaft of the gradual change section, and the top end of the air duct 10 is connected with an air pavilion or an air cap 11; the air duct 10 can be made of steel pipes, steel-plastic composite pipes and ductile cast iron pipes;

the top plate is provided with a lifting opening 17 and an inspection opening 13, the opening part of the lifting opening 17 is provided with a top reversing beam 18 for reinforcing the opening, and meanwhile, the cornice of the top reversing beam 18 shown in fig. 2 is also beneficial to preventing underground water of the top plate from penetrating into the nodes; the inspection port 13 is provided with a 90-degree steel cat ladder 14 which is communicated with the node for overhauling and personnel escape; referring to fig. 3 and 5, 8 hooks 12 are uniformly distributed on the top plate and are positioned on the side wall of the node to be connected with the wall body of the side wall, so that firmness is improved.

The prefabricated combined node is suitable for rapid construction of a small-sized comprehensive pipe rack, wherein a prefabricated structural body of the combined node 2 is installed below the ground A, referring to FIG. 2, a prefabricated shaft 15 is built at an inspection opening 13, a well cover 16 is arranged at the well opening of the shaft, a prefabricated cover plate 19 is covered at a hoisting opening 17, an air inlet of an air duct 10 is exposed at the top end of the ground and is connected with a wind pavilion or a wind cap 11 on the ground, and the top plate is covered with soil to form an upper pavement structure.

Referring to fig. 1-3, the prefabricated combined node is suitable for rapid construction of a small-sized comprehensive pipe rack, wherein the inspection port 13 and the lifting port 17 are sequentially and longitudinally arranged in the middle of the top plate; and the hole part of the lifting hole 17 is provided with an upper reversing beam 18 for reinforcement.

The hoisting node is wholly positioned underground, the hoisting port is also provided with a cover plate, but when the underground water level is lower, surface water can permeate the top plate of the node downwards through soil bodies under the conditions of ground greening, raining, precipitation and the like, and the surface water can flow into the hoisting node through gaps at the edge of the opening of the top plate. After the opening edge is provided with the counter beam, the counter beam plays a part of role of a water blocking ridge. The counter beam is beneficial to preventing the top groundwater from penetrating into the nodes;

examples

Referring to fig. 1-5, the specific technical scheme of this embodiment is as follows:

the interface of the small pipe gallery standard section 1 and the combined node 2 adopts a connecting tongue-and-groove 6, the combined node 2 is provided with a gradual change section 3, an outward expansion section 4, the turning radius of a main electric power pipeline is met, and the outgoing line of a land block branch line is met. The height of the combined node 2 is higher than that of a small pipe gallery standard section 1 pipe gallery, the protruding section 5 is embedded with a rigid waterproof sleeve 7, a phi 110 galvanized seamless steel pipe II 9 and a phi 150 galvanized seamless steel pipe I8 to meet the wire outlet demand, the protruding section 5 is embedded with an air duct 10, and the air duct 10 can be made of steel pipes, steel-plastic composite pipes and ductile cast iron pipes. The lifting opening 17 and the inspection opening 13 are arranged above the combined node, and the existence of the opening of the lifting opening 17 is unfavorable for the integrity of the node, so that the opening is reinforced by adding the upper reversing beam 18 to the opening, and meanwhile, the cornice of the upper reversing beam 18 is beneficial to preventing the groundwater of the top plate from penetrating into the node, and the inspection opening 13 is provided with the 90-degree steel ladder stand 14 for overhauling and personnel escaping. 8 lifting hooks 12 are arranged at the top plate for lifting the automobile crane. The utility model adopts the wind pavilion or the wind cap 11 for design ventilation, the wind channel 10 is arranged, the wind channel 10 can adopt a steel pipe, a steel-plastic composite pipe and a ball-milling cast iron pipe, the wind channel 10 can be laid according to the positions of the wind pavilion and the wind cap 11, the flexibility is strong, and the influence on peripheral landscapes is small. After the integral prefabricated nodes are installed in place, the prefabricated shaft 15 is built, the well cover 16 is installed, after the pipeline is installed, the concrete prefabricated cover plate 19 is covered on the hoisting opening 17, and finally, the upper pavement structure is formed by covering soil.

The technical scheme of this embodiment is further described as follows:

prefabricated structure: the combined node reasonably carries out comprehensive arrangement of pipelines according to professional technical requirements of electric power, communication, water supply, regenerated water pipelines and the like. The node is provided with an outer expansion section and a convex section, thereby meeting the requirements of professional pipeline conversion, branch line outlet and overhaul space. The convex section is embedded with a rigid waterproof sleeve, a phi 110 galvanized seamless steel pipe II and a phi 150 galvanized seamless steel pipe I as outlets. The protruding section is embedded with an air duct, and the air duct can be made of steel pipes, steel-plastic composite pipes and ductile cast iron pipes so as to realize the ventilation function. The top plate above the inspection channel is provided with an inspection port and a lifting hole, and a 90-degree steel live-hanging crawling ladder is arranged from the shaft port of the shaft built above the inspection port to the inspection channel, so that the functions of personnel escape, overhaul and lifting are realized.

Embedding a pipeline outlet sleeve, and prefabricating and forming the pipeline outlet sleeve and node concrete integrally; the utility model adopts a mode of adding the upper reversing beam for reinforcing the opening of the top plate, and meanwhile, the cornice of the upper reversing beam is also beneficial to preventing the groundwater of the top plate from penetrating into the nodes.

The standard section of the small pipe gallery of the embodiment adopts a small comprehensive pipe gallery with a standard section of 1.9m×1.9m, the total length of the whole prefabricated node is about 7m, the widest part is about 4.5m wide, and the total weight of the prefabricated combined node is about 59.5t. The prefabricated combined nodes of the small pipe gallery standard sections with other standard sections can be correspondingly measured and calculated according to the conditions and the transportation conditions of the utility model.

Lifting hook: and 8 lifting hooks are arranged at the top plate by adopting an automobile crane and steel wire rope hoisting mode, and the lifting hooks and the steel reinforcement cage are integrally bound during prefabrication.

An interface: the connecting tongue-and-groove sections at the two ends of the prefabricated combined node are correspondingly embedded with the connecting tongue-and-groove sections of the standard section of the small pipe gallery, and the requirements of on-site splicing can be met by referring to FIG. 4. The utility model adopts a tongue-and-groove form, the outer side of the tongue-and-groove form is smooth and easy to install, and the tongue-and-groove form has the uneven settlement resistance of the faucet. In order to reduce construction difficulty, the prefabricated section is tightly propped up during longitudinal hoisting, and a mode of tensioning the prestressed tendons is not adopted. And a tongue-and-groove connection mode is adopted, and a rubber ring is pre-buried for stopping water.

Well bore and well lid: and after the prefabricated nodes are installed in place, the prefabricated shaft is built to install the well cover.

Ventilation channel and hood: the ventilation adopts a wind pavilion or a wind cap. The air duct is arranged, the air duct can adopt a steel pipe, a steel-plastic composite pipe and a ball-milling cast iron pipe, and can be laid according to the positions of the wind booth and the wind cap, so that the flexibility is high, and the influence on peripheral landscapes is small.

Concrete prefabricated cover plate: and after the pipeline is installed, covering a concrete prefabricated cover plate on the hoisting opening, and covering the cover plate with soil for about 1m.

The specific construction method of the embodiment is as follows:

the construction mode of the combined node prefabrication is the traditional method which is different from the construction mode of the prefabrication of the standard section of the small pipe gallery, and the main steps are binding of a reinforcement cage, setting up of a template, embedding of hanging rings and sleeves, concrete pouring, maintenance and transportation to site installation.

In the specific whole prefabrication implementation process,

(1) two grooves are formed in the embedded end of the standard section interface of the small pipe gallery, referring to fig. 4, an inner viscoelastic rubber sealing gasket 102 is arranged, grouting holes 104 are reserved in the embedded end wall between the two rubber gaskets, and grouting sealing is adopted after the small pipe gallery is installed in place.

(2) And (3) an installation and positioning stage: friction force between floors is reduced by paving a thin sand layer under the bottom plate of the node, and the in-place installation progress of the prefabricated section can be quickened by externally applying thrust.

(3) And after the integral prefabricated nodes are installed in place, a prefabricated shaft is built, after the pipeline is installed, a concrete prefabricated cover plate is covered on the hoisting opening, and finally, soil is covered to make an upper pavement structure.

(4) The deformation joint sealant adopts a general two-component polysulfide sealant 101 for pipe gallery engineering, the caulking material is a low-foaming high-density closed-pore type polyethylene foam plastic caulking plate 103, and the material has the advantages of low water absorption, good anti-seepage performance, good ageing resistance and the like, and is often applied to caulking of deformation joints of underground structures. After the prefabricated section is installed in place, a low-foaming high-density closed-pore type polyethylene foam plastic joint filling plate is firstly plugged into a gap at the joint of the prefabricated section and the standard section of the small pipe gallery, and then the surface is filled with the double-component polysulfide sealant.

Claims

1. The prefabricated combined node is characterized by being a prefabricated structure body and comprising an inspection port (13), a hoisting port (17), a connecting tongue-and-groove (6), an air duct (10) and a concrete prefabricated cover plate (19);

the combined node (2) is a shaft surrounded by side walls, and the top and the bottom of the combined node are provided with integrally formed top plate and bottom plate sealing covers; on the horizontal plane, side walls at two ends of the shaft are provided with connecting rabbets (6) which are connected with the small pipe gallery standard section (1) and extend out of the shaft, and the interiors of the connecting rabbets are communicated with the interiors of the combined nodes; the well bore is provided with an outer expansion section (4) which is wider than two ends of the well bore in the middle, a gradually-retracted gradual change section (3) is arranged between the outer expansion section (4) and the two ends of the well bore, well bore side walls on two sides of the outer expansion section are arranged in parallel, and well bore side walls on two sides of the gradual change section are obliquely arranged in a splayed shape; in the vertical direction, the height of the combined node (2) is higher than that of a pipe gallery of the small pipe gallery standard section (1), wherein the section which is higher than the height of the small pipe gallery standard section is a raised section (5), rigid waterproof sleeves (7), galvanized seamless steel pipes II (9) and galvanized seamless steel pipes I (8) are pre-embedded in the side walls of the outer expansion sections at the two sides of the raised section, an air duct (10) is arranged on the side wall of a shaft of the gradual change section, and the top end of the air duct (10) is connected with an air pavilion or an air cap (11);

a hoisting opening (17) and an inspection opening (13) are formed in the top plate; the inspection port (13) is provided with a 90-degree steel crawling ladder (14) which is led into the node; and a plurality of lifting hooks (12) are uniformly distributed at the top plate and are positioned on the side wall of the node.

2. The prefabricated combined node suitable for rapid construction of a small utility tunnel according to claim 1, wherein the prefabricated structure of the combined node (2) is installed below the ground, the inspection opening (13) is used for building the prefabricated shaft (15) and the wellhead of the inspection opening is exposed out of the ground and is provided with the well cover (16), the hoisting opening (17) is covered with the prefabricated concrete cover plate (19), the air inlet of the air duct (10) is exposed out of the top end of the ground and is connected with a wind pavilion or a wind cap (11) on the ground, and the top plate is covered with soil to be used as an upper pavement structure.

3. The prefabricated combined node suitable for rapid construction of a small utility tunnel according to claim 1, wherein the inspection port (13) and the hoisting port (17) are sequentially and longitudinally arranged in the middle of the top plate; and an upper reversing beam (18) is arranged at the hole part of the hoisting hole (17).

4. The prefabricated combined node suitable for rapid construction of the small utility tunnel as claimed in claim 1, wherein 8 lifting hooks (12) are uniformly distributed at the top plate.