CN211596836U

CN211596836U - Pipe gallery turning structure and comprehensive pipe gallery

Info

Publication number: CN211596836U
Application number: CN201922324112.3U
Authority: CN
Inventors: 黄喆; 姜占鹏; 杨洋; 崔海龙; 王燕红; 张琼
Original assignee: MCC Capital Engineering and Research Incorporation Ltd
Current assignee: MCC Capital Engineering and Research Incorporation Ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-09-29
Anticipated expiration: 2029-12-23

Abstract

The utility model provides a piping lane turn structure and utility tunnel, this piping lane turn structure include at least one curve turn section, curve turn section has inboard curve corridor wall and outside curve corridor wall, inboard curve corridor wall with outside curve corridor wall all includes the first corridor wall, second corridor wall and the third corridor wall that connect gradually, wherein: the first gallery wall has a round-curved inner concave surface, the second gallery wall has a linear surface, the third gallery wall has a round-curved outer convex surface, the round-curved inner concave surface has a first radius of curvature, and the round-curved outer convex surface has a second radius of curvature. The utility model discloses a piping lane turn structure and utility tunnel have solved the smooth current problem of personnel and/or equipment that reaches of piping lane ventilation.

Description

Pipe gallery turning structure and comprehensive pipe gallery

Technical Field

The utility model relates to an underground pipe gallery design technical field especially relates to a piping lane turn structure and utility tunnel.

Background

The pipe gallery is a structure and an accessory facility which are built under the city and used for accommodating city municipal pipelines. The tunnel space is built under the city, and various engineering pipelines such as electric power, communication, gas, heat supply, water supply and drainage and the like are integrated, wherein the cable pipe gallery refers in particular to the city underground tunnel space which only contains electric power and communication cables.

At present, all kinds of pipelines must be completely built in an area provided with a pipe gallery, the areas outside the pipelines must not be newly built with the pipelines, particularly for a large number of unsettled overhead cables in a city, cable landing and corridor must be carried out, wherein the cable landing and corridor mainly comprises 10kv cables and 110kv cables.

Because piping lane cost and space are limited, and cable demand capacity is great in addition, consequently can compress the inner space as far as possible in the design process, this has just caused that the inside action space that supplies the staff to overhaul or escape under the dangerous situation of city underground pipe gallery is very limited, is unfavorable for personnel's work and action, also is difficult to guarantee the required maintenance of every cable and turn the space simultaneously. The electric power cable adopts two sides to arrange in the piping lane, and the cabin is in underground space and less action space in addition, very easily makes the maintainer produce oppression in the heart, is unfavorable for long-term operating condition's the maintenance and the maintenance of psychological state under the emergency.

Particularly, as the municipal road often has a canalization section or a widening section, for the urban underground pipe gallery designed along the line position of the road, in order to meet the requirement of the line position, the urban underground pipe gallery must be turned along with the line position; or when the obstacle needs to be avoided on the plane, the turning on the plane is needed. At present, the internal dog-ear of adopting 45 or other fixed angles usually folds, and design and construction have been simplified to a certain extent to this kind of design though, have reduced engineering cost, but often can cause the blind area in the piping lane fortune dimension expert personnel vision, aggravate mental state's depression, also can cause certain influence to the inside ventilation of piping lane, the transportation of pipeline and personnel's evacuation escape simultaneously, have certain drawback.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a piping lane turn structure and utility tunnel have solved the smooth current problem of pipe gallery ventilation and personnel and/or equipment smoothly.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a piping lane turn structure, piping lane turn structure includes at least one curve turn section, curve turn section has inboard curve corridor wall and outside curve corridor wall, inboard curve corridor wall with outside curve corridor wall all includes first corridor wall, second corridor wall and the third corridor wall that connects gradually, wherein:

the first gallery wall has a round-curved inner concave surface, the second gallery wall has a linear surface, the third gallery wall has a round-curved outer convex surface, the round-curved inner concave surface has a first radius of curvature, and the round-curved outer convex surface has a second radius of curvature.

The utility model discloses an in the embodiment, the second gallery wall of inboard curvilinear corridor wall with width between the second gallery wall of outside curvilinear corridor wall is less than the first corridor wall of inboard curvilinear corridor wall with width between the first corridor wall of outside curvilinear corridor wall, and be less than the third corridor wall of inboard curvilinear corridor wall with width between the third corridor wall of outside curvilinear corridor wall.

In an embodiment of the invention, the second gallery wall of the inner curvilinear gallery wall and the width between the second gallery walls of the outer curvilinear gallery wall is greater than or equal to 1 m.

The utility model discloses an in the embodiment under the state of laying the cable on the inboard curve corridor wall of curve turn section, the first radius of curvature of the circular curve inner concave surface of inboard curve corridor wall and the second radius of curvature of the circular curve outer convex surface of inboard curve corridor wall is minimum radius of curvature and the sum of cable turning radius added value.

The utility model discloses an in the embodiment under the state of laying the cable on the outside curve corridor wall of curve turn section, the first curvature radius of the circular curve inner concave surface of outside curve corridor wall and the second curvature radius of the circular curve outer convex surface of outside curve corridor wall is minimum curvature radius and the sum of cable turning radius added value.

The utility model discloses an in the embodiment, cable turning radius additional value is kD, and wherein, D does the diameter of cable, k are the cable constant.

In an embodiment of the invention, the minimum radius of curvature is determined according to the escape speed of the person and the ventilation pattern in the pipe gallery turning structure.

In an embodiment of the present invention, in a state where the first end of the curved turning section is the ventilation air inlet, the first radius of curvature of the outer curved corridor wall is greater than the first radius of curvature of the inner curved corridor wall; or, the second curvature radius of the outer side curve corridor wall is larger than the second curvature radius of the inner side curve corridor wall under the condition that the second end part of the curve turning section is a ventilation air inlet.

The utility model discloses an in the embodiment, the height of curve turn section is H, the width of curve turn section is B, then there is: 0.5< B/H < 6.5.

The utility model discloses an in the embodiment, two liang of adjacent curve turn section links to each other through the interval section, the length of interval section is LS, the width of interval section is DS, then has: 3< LS/DS < 5.

The utility model also provides a utility tunnel, including foretell piping lane turn structure.

The utility model discloses a piping lane turn structure and utility tunnel's characteristics and advantage are: the utility model discloses a combined curve's that two sections circle curves and straight line are constituteed turn structure has mainly solved and has adopted 45 or the problem that other fixed angle corners faced. Firstly, the utility model is more beneficial to the passing of maintainers and maintenance equipment, so that the sight is smooth, the psychological pressure of the staff in the pipe gallery is reduced, the escape and the maintenance are facilitated, the unsmooth ventilation caused by the line shape is reduced, and the ventilation is facilitated; meanwhile, local external expansion of the pipe gallery main body caused by large-angle turning of the pipe gallery is reduced, and the utilization rate of an underground space is improved; in addition, the device can be used for locally avoiding underground existing pipelines or being combined with existing buildings at special positions, is more beneficial to keeping the line positions consistent with those of road engineering, is beneficial to the coordinated design of the road engineering and the road engineering, and avoids the phenomenon of local deviation of the line positions of the pipeline corridor; moreover, when arranging the cable in the piping lane, this piping lane break structure still can protect the cable, reduces the stress concentration of corner cable, extension cable life.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is the utility model discloses a piping lane turn structure's schematic diagram.

FIG. 2 is a graph of radius versus velocity.

FIG. 3 is a graph of verification of radius versus velocity.

FIG. 4 is a graph of the effect of aspect ratio of the curve transition on the local resistance coefficient.

FIG. 5 is a graph of the effect of pitch segments on local drag coefficients.

The reference numbers illustrate: 1. a curve turning section; 11. an inner curvilinear corridor wall; 111. a first corridor wall; 112. a second corridor wall; 113. a third corridor wall; 12. an outer curvilinear corridor wall; 121. a first corridor wall; 122. a second corridor wall; 123. a third corridor wall; r1, first radius of curvature; r2, second radius of curvature; 2. a spacing segment; 3. a first end portion; 4. a second end portion; LS, length; DS, width.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Implementation mode one

As shown in fig. 1, the utility model provides a pipe gallery turning structure, it includes at least one curve turning section 1, curve turning section 1 has inside curve gallery wall 11 and outside curve gallery wall 12, inside curve gallery wall 11 with outside curve gallery wall 12 all includes first gallery wall 111 (or first gallery wall 121), second gallery wall 112 (or second gallery wall 122) and third gallery wall 113 (or third gallery wall 123) that connect gradually, wherein: first corridor wall 111 (or first corridor wall 121) has a circular curve inner concave surface, second corridor wall 112 (or second corridor wall 122) has a straight line surface, third corridor wall 113 (or third corridor wall 123) has a circular curve outer convex surface, circular curve inner concave surface has a first radius of curvature R1, circular curve outer convex surface has a second radius of curvature R2.

This piping lane turn structure uses in city underground pipe gallery's book department, can make the piping lane design reduce the corner blind area when avoiding increasing the cost by a wide margin, guarantees personnel's speed of fleing and piping lane ventilation effect, reaches the effect that guides sight, transition gently.

The inventor finds that: present piping lane is in turn position department, adopt 45 or other fixed angle's dog-ear to roll over usually, design and construction have been simplified to a certain extent to this kind of design, engineering cost has been reduced, but often can cause the blind area in the piping lane fortune dimension expert personnel's vision, aggravation mental state's depression, when adopting 45 dog-ear forms simultaneously, the air current can directly collide with the corridor wall in the transmission process, produce the unstability and vibrate, be unfavorable for the piping lane ventilation, and then can be to the inside ventilation of piping lane, the transportation of pipeline and personnel's evacuation are fleed and are produced certain influence, certain drawback has.

The utility model discloses a piping lane turn structure, its inboard curve corridor wall 11 and outside curve corridor wall 12 all adopt the turn structure of the compound curve that two sections circle curves and straight line are constituteed, have mainly solved and have adopted 45 or the problem that other fixed angle corners faced. Firstly, the utility model is more beneficial to the passing of maintainers and maintenance equipment, so that the sight is smooth, the psychological pressure of the staff in the pipe gallery is reduced, the escape and the maintenance are facilitated, the unsmooth ventilation caused by the line shape is reduced, and the ventilation is facilitated; meanwhile, local external expansion of the pipe gallery main body caused by large-angle turning of the pipe gallery is reduced, and the utilization rate of an underground space is improved; in addition, the device can be used for locally avoiding underground existing pipelines or being combined with existing buildings at special positions, is more beneficial to keeping the line positions consistent with those of road engineering, is beneficial to the coordinated design of the road engineering and the road engineering, and avoids the phenomenon of local deviation of the line positions of the pipeline corridor; moreover, when arranging the cable in the piping lane, this piping lane break structure still can protect the cable, reduces the stress concentration of corner cable, extension cable life.

Specifically, the boundary of the inside curved corridor wall 11 and the boundary of the outside curved corridor wall 12 are determined according to the turning requirement of the pipe corridor and the site conditions, for example, because the pipe corridor is usually set below a road green belt or a sidewalk along with the road construction, and the line shape of the pipe corridor is consistent with the line of the road, the pipe corridor needs to be adjusted along with the line position at the turning and widening part of the road, that is, the boundary of the inside curved corridor wall 11 and the boundary of the outside curved corridor wall 12 need to be determined.

In an embodiment of the present invention, the width b between the second gallery wall 112 of the inner curved gallery wall 11 and the second gallery wall 122 of the outer curved gallery wall 12 is smaller than the width b1 between the first gallery wall 111 of the inner curved gallery wall 11 and the first gallery wall 121 of the outer curved gallery wall 12, and is smaller than the width b2 between the third gallery wall 113 of the inner curved gallery wall 11 and the third gallery wall 123 of the outer curved gallery wall 12. That is, in a curve turning section 1, the value of the width b is minimum, and by adopting the design structure, the design construction cost can be reduced on the premise of ensuring smooth traffic.

In the present embodiment, the width b between the second gallery wall 112 of the inner curved gallery wall 11 and the second gallery wall 122 of the outer curved gallery wall 12 is greater than or equal to 1 m. This width b needs to satisfy the basic work and traffic requirements of personnel or inspection robots, see table 1 for specific requirements:

TABLE 1

According to the utility model discloses an embodiment, under the state of laying the cable on the inboard curve corridor wall 11 of curve turn section 1, the first radius of curvature R1 of the circular curve inner concave surface of this inboard curve corridor wall 11 and the second radius of curvature R2 of the circular curve outer convex surface of inboard curve corridor wall 11 are the sum of minimum radius of curvature and cable turning radius added value A.

Further, in a state where the cable is laid on the outer curved corridor wall 12 of the curved turning section 1, the first curvature radius R1 of the circular curved inner concave surface of the outer curved corridor wall 12 and the second curvature radius R2 of the circular curved outer convex surface of the outer curved corridor wall 12 are the sum of the minimum curvature radius and the cable turning radius additional value a.

The additional value A of the turning radius of the cable is kD, wherein D is the diameter of the cable, and k is a cable constant. It is noted herein that the cable is generally referred to as a power cable or a communication cable.

The inventor finds that: the cables in the pipe gallery are laid side by side, and certain natural bending can be formed after the cables are laid. Consequently, for the turning radius demand of guaranteeing all cables in the piping lane, the utility model discloses cable turning radius added value A has been proposed based on this kind of actual conditions, and this cable turning radius added value A's parameter value is shown as table 2:

TABLE 2

Cable type	Additional value A of turning radius of cable
		10kv	3D
110kv	1D
		Optical cable	4D

The radius requirement of all cables in the pipe rack is guaranteed to this proposition of cable turn radius additional value A to the requirement of cable to the minimum radius of curvature of turning in the pipe rack under having obtained different materials from this, as shown in Table 3:

TABLE 3

The utility model discloses in, above-mentioned minimum curvature radius is confirmed according to personnel's speed of fleing and the ventilation form in the piping lane turn structure.

The inventor finds that: the turn of pipe gallery is the main loss department of pipe gallery ventilation, and the ventilation loss of turn department is often not considered in current pipe gallery design, and such design result often has the inequality or economic nature.

To this point problem, the utility model discloses a ventilation form of piping lane turn position, whether according to the cable capacity in the piping lane and contain 110kv cable and confirm, it has changed the extensive form of ventilation design among the existing piping lane. The utility model discloses a ventilation form of piping lane turn position is seen in table 4 and is shown:

TABLE 4

Wherein, the natural ventilation means the natural air intake mechanical air exhaust; mechanical ventilation refers to mechanical air intake and mechanical air exhaust.

In addition, the first radius of curvature R1, and the second radius of curvature R2, are determined according to the type of service carrier within the pipe lane, whether the minimum radius of curvature requirement needs to be met.

Specifically, for a pipe gallery which only adopts an overhauling robot, the requirement of minimum curvature radius for escape of personnel can be not considered; for the pipe gallery which adopts inspectors or gives consideration to the passing requirements of people such as civil air defense, the requirement of minimum curvature radius for escape of people must be met.

According to the specification requirements of 'urban comprehensive pipe gallery engineering technical specification GB 50838-2015', the escape distance of a cabin for laying a power cable is not more than 200 m. The inventor finds that: when a fire disaster occurs in the pipe gallery, the fire disaster scale is 20MW, and under the condition of adopting natural ventilation, smoke caused by the fire disaster fills the top of the pipe gallery in about 67s to reach the escape limit value; with mechanical ventilation, the delay caused by a fire fills the top of the pipe gallery in about 80 seconds. Therefore, when natural ventilation is adopted, the minimum escape speed of personnel in the pipe gallery is 1.5 m/s; when mechanical ventilation is adopted, the minimum escape speed of the personnel in the pipe gallery is 1.25 m/s.

In addition, the inventors have also found that: the normal running speed of an adult is 5.5m/s, and based on the speed, the experiment allows the experimenter to pass through circular curves with different radii at the same speed of 5.5m/s, thereby obtaining a graph of the radius R (m) and the speed (m/s) of the passing curve, as shown in FIG. 2.

Looking at the test data of fig. 2, at a curve radius R of 36m, there is a significant change in the trend of the data, with the speed through the curve increasing as the radius continues to increase, but not significantly; when the radius is less than 36m, the speed through the curve decreases significantly and the effect of the curve on running speed increases significantly. From this analysis, it can be seen that when the radius of the curve is 36m, the centrifugal force generated when running on the curve is small, ensuring that the runner does not significantly brake.

Formula F ═ mv according to centrifugal force²The radius R and the speed V can be obtained on the premise of the same mass²Proportional, and it is reasonable to conclude from this that the curve radius is proportional to the square of the curve speed: r ═ f (V)²)；

Further, as shown in FIG. 2, when F takes a value of 5.88 (minimum centrifugal force), then there is

Wherein R: a minimum radius of curvature; v: speed; m: the quality of the person.

Therefore, when the minimum escape speed in the pipe gallery is 1.3m/s, the formula R is f (V)²) A minimum radius of curvature R of 2.0m is obtained. Table 5 minimum radius of curvature requirement for personnel escape:

TABLE 5

Speed of rotation	Minimum radius of curvature R value
		Suitable escape speed is 2.0m/s	4.8m
The lowest escape speed of natural ventilation is 1.5m/s	2.7m
		Mechanical ventilation minimum escape speed of 1.3m/s	2.0m

Therefore, in order to ensure that the personnel can escape smoothly under the worst adverse conditions, the escape passage of the pipe gallery must be smooth and unimpeded.

In addition, the utility model discloses make the same laboratory technician pass through the circular curve of different radiuses with 1.3 m/s' speed to survey corresponding circular curve and pass through speed, as shown in FIG. 3: the experimental result proves that the minimum curvature radius requirement for escape of the personnel adopting the pipe gallery turning structure with the combined curve is calculated through deduction.

The design index recommends that the escape speed of 2.0m/s is guaranteed to carry out curve design, and when the condition is limited, the minimum guaranteed speed of the curve is 1.5m/s for the state of natural ventilation; for the conditions with mechanical ventilation, the minimum guaranteed speed of the curve is 1.3 m/s.

According to an embodiment of the present invention, in a state where the first end 3 of the curved turning section 1 is the ventilation inlet, the first radius of curvature R1 of the outer curved corridor wall 12 is larger than the first radius of curvature R1 of the inner curved corridor wall 11; alternatively, in a state where the second end 4 of the curved turning section 1 is the ventilation inlet, the second radius of curvature R2 of the outer curved corridor wall 12 is greater than the second radius of curvature R2 of the inner curved corridor wall 11. Adopt this kind of design to increase into wind gap gas volume, reduce because the air current directly collides the energy loss that causes with the corridor side wall of piping lane in the transmission process.

According to the utility model discloses an embodiment, curve turn section 1's height is H, and curve turn section 1's width is B, then has: 0.5< B/H < 6.5.

Specifically, the inventor calculates the same air volume (for example, 8600 m) through simulation³H) and the same curvature radius (for example, 1D), the local resistance coefficient of the curve turning structure under different aspect ratio conditions changes, and the curve of fig. 4 is obtained. From the analysis in figure 4 can obtain, for guaranteeing the inside ventilation requirement of piping lane, the local resistance coefficient of ventilation of piping lane turn department should be less than 0.18, consequently the utility model discloses design the aspect ratio B/H of curve turn section 1 for being less than 6.5, simultaneously, consider the antidumping nature of piping lane structure with being less than 6.5And the minimum size requirement of the structure, the aspect ratio B/H is further limited to greater than 0.5.

According to the utility model discloses an embodiment, as shown in fig. 1, two liang of adjacent curve turn sections 1 link to each other through interval section 2, and the length of this interval section 2 is LS, and the width of this interval section 2 is DS, then has: 3< LS/DS < 5.

When the pipe gallery turning structure is composed of more than two curve turning sections 1, the adjacent two curve turning sections 1 can generate mutual influence to form an interference effect. Through the analog calculation of the local resistance coefficients of two curve turning sections 1 at different pitches (as shown in fig. 5), the length LS of the pitch section 2 needs to be checked for the composition structure of more than two curve turning sections 1 during design.

When the ratio of the local resistance coefficient of the pipe gallery turning structure formed by combining the two groups of curve turning sections 1 is less than LS/DS <5, and when the ratio of LS/DS <3 or LS/DS >5, the local resistance coefficient of the pipe gallery turning structure formed by combining the two groups of curve turning sections 1 is obviously greater, and the curve combination parameters need to be readjusted to meet the requirements.

Second embodiment

As shown in fig. 1 to 5, the utility model discloses still provide a utility tunnel, including embodiment one the pipe gallery turn structure. The specific structure and the beneficial effects of the pipe gallery turning structure are the same as those described in the first embodiment, and are not described again here.

The above description is only for the embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a piping lane turn structure, a serial communication port, piping lane turn structure includes at least one curve turn section, curve turn section has inboard curve corridor wall and outside curve corridor wall, inboard curve corridor wall with outside curve corridor wall all includes the first corridor wall, second corridor wall and the third corridor wall that connect gradually, wherein:

2. The piping lane turning structure of claim 1, wherein a width between the second gallery wall of the inner curvilinear gallery wall and the second gallery wall of the outer curvilinear gallery wall is less than a width between the first gallery wall of the inner curvilinear gallery wall and the first gallery wall of the outer curvilinear gallery wall, and is less than a width between the third gallery wall of the inner curvilinear gallery wall and the third gallery wall of the outer curvilinear gallery wall.

3. A tube lane break structure according to claim 1 or 2, wherein the width between the second gallery wall of the inner curvilinear gallery wall and the second gallery wall of the outer curvilinear gallery wall is greater than or equal to 1 m.

4. The piping lane transition structure of claim 1, wherein in a state where a cable is laid on the inside curved corridor wall of the curved transition section, the first radius of curvature of the circular curved inner concave surface of the inside curved corridor wall and the second radius of curvature of the circular curved outer convex surface of the inside curved corridor wall are the sum of the minimum radius of curvature and the added value of the turning radius of the cable.

5. The piping lane turning structure of claim 1, wherein in a state where a cable is laid on the outside curved corridor wall of the curved turning section, the first radius of curvature of the circular curved inner concave surface of the outside curved corridor wall and the second radius of curvature of the circular curved outer convex surface of the outside curved corridor wall are the sum of the minimum radius of curvature and the added value of the turning radius of the cable.

6. A tube lane break structure according to claim 4 or 5, wherein the cable turn radius added value is kD, where D is the diameter of the cable and k is the cable constant.

7. A tube lane break structure according to claim 4 or 5, characterized in that said minimum radius of curvature is determined according to the escape speed of the person and the form of ventilation in the tube lane break structure.

8. The tube lane transition structure of claim 1, wherein the first radius of curvature of the outer curvilinear lane wall is greater than the first radius of curvature of the inner curvilinear lane wall in a state where the first end of the curvilinear transition section is a vent air inlet; or, the second curvature radius of the outer side curve corridor wall is larger than the second curvature radius of the inner side curve corridor wall under the condition that the second end part of the curve turning section is a ventilation air inlet.

9. A tube lane break structure according to claim 1, wherein the height of said curved break is H and the width of said curved break is B, then: 0.5< B/H < 6.5.

10. The tube lane turning structure of claim 1, wherein two adjacent curved turning sections are connected by a spacing section, the length of the spacing section is LS, the width of the spacing section is DS, then: 3< LS/DS < 5.

11. A utility tunnel comprising a tunnel turning structure according to any one of claims 1 to 10.