CN211006761U

CN211006761U - Mounting structure of circulating water pipe

Info

Publication number: CN211006761U
Application number: CN201921976246.7U
Authority: CN
Inventors: 滕平强; 杨斌
Original assignee: SEPCO Electric Power Construction Co Ltd
Current assignee: SEPCO Electric Power Construction Co Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-07-14
Anticipated expiration: 2029-11-15

Abstract

The utility model relates to the technical field of pipeline installation, and provides an installation structure of a circulating water pipe, which comprises a track, a sleeper arranged below the track, and a ballast cushion layer arranged below the sleeper; a prefabricated layer is arranged below the stone slag cushion layer; a sand cushion layer is arranged below the prefabricated layer; the precast layer includes at least one precast concrete member having at least one precast channel therein that spans the track. The utility model discloses circulating pipe's mounting structure through setting up the precast concrete component, at the in-process of site operation, has practiced thrift the setting time of concrete, and then has shortened construction period greatly, has improved the efficiency of construction.

Description

Mounting structure of circulating water pipe

Technical Field

The utility model relates to a piping erection technical field, in particular to circulating pipe's mounting structure.

Background

In the subsequent expansion project of a large coal-fired power plant, a circulating water pipe of a condenser needs to penetrate through the current special line of the coal transportation railway, and the circulating water pipe needs to penetrate through the lower part of the special line of the coal transportation railway for safety and space saving. Therefore, in order to ensure the continuous operation of the coal-fired power plant, the construction work of the circulating water pipe must be completed before the storage amount of the fuel coal in the coal storage yard drops to a critical point.

The construction method for the existing circulating water pipe to pass through the special railway line comprises the following steps: removing the railway track at the construction position, excavating, pouring a concrete cushion layer at the bottom, after the concrete cushion layer is solidified and meets the requirement, covering a sand cushion layer on the upper part of the concrete cushion layer, arranging circulating water pipes, performing formwork construction of pouring concrete by the circulating water pipes after the arrangement is finished, and pouring concrete after the formwork construction is finished; and after the concrete is solidified and qualified by inspection, restoring the removed railway track to the original position, and completing the construction of the circulating water pipe. However, the construction period of the method is at least 25 days, and the construction period is long, so that the method is not suitable for the condition that the storage capacity of a coal storage yard is small.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a circulating pipe's that construction period is short mounting structure is provided.

The utility model provides a technical scheme that its technical problem adopted is: the mounting structure of the circulating water pipe comprises a rail, a sleeper arranged below the rail and a ballast cushion layer arranged below the sleeper; a prefabricated layer is arranged below the stone slag cushion layer; a sand cushion layer is arranged below the prefabricated layer; the precast layer includes at least one precast concrete member having at least one precast channel therein that spans the track.

Further, precast concrete component includes two at least precast concrete pipe galleries along orbital width direction concatenation, has at least one pipe gallery hole in every precast concrete pipe gallery, and the pipe gallery hole of the corresponding position on all precast concrete pipe galleries constitutes prefabricated passageway.

Further, the top of the precast concrete pipe gallery is provided with an embedded part; and the embedded parts of the adjacent precast concrete pipe galleries are fixedly connected through connecting pieces.

Further, the prefabricated concrete pipe gallery support structure further comprises a support beam arranged at the splicing position of the adjacent prefabricated concrete pipe galleries; one end of the supporting beam is located below one precast concrete pipe gallery, and the other end of the supporting beam is located below the other precast concrete pipe gallery.

Furthermore, the two ends of the top of the precast concrete member are respectively provided with a stone blocking strip extending along the length direction of the track.

Furthermore, the thickness of the ballast cushion layer is more than or equal to 400 mm.

Furthermore, the thickness of the sand cushion layer is more than or equal to 50 mm.

The utility model has the advantages that: the utility model discloses circulating pipe's mounting structure through setting up the precast concrete component, at the in-process of site operation, has practiced thrift the setting time of concrete, and then has shortened construction period greatly, has improved the efficiency of construction.

Drawings

Fig. 1 is a front view of a mounting structure of a circulating water pipe according to an embodiment of the present invention;

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

fig. 3 is a schematic structural view of a precast concrete pipe gallery in an embodiment of the present invention;

FIG. 4 is a cross-sectional view B-B of FIG. 3;

fig. 5 is a schematic view showing the construction of the circulating water pipe after passing through the railway.

The reference numbers in the figures are: 1-rail, 2-sleeper, 3-ballast cushion layer, 4-sand cushion layer, 5-precast concrete member, 6-precast channel, 7-precast concrete pipe gallery, 8-pipe gallery hole, 9-embedded part, 10-connecting part, 11-supporting beam, 12-stone blocking strip and 13-circulating water pipe.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in fig. 1 and 2, the installation structure of the circulating water pipe of the embodiment of the present invention includes a rail 1, a sleeper 2 disposed below the rail 1, and a ballast bed layer 3 disposed below the sleeper 2; a prefabricated layer is arranged below the stone slag cushion layer 3; a sand cushion layer 4 is arranged below the prefabricated layer; the precast layer comprises at least one precast concrete element 5, and the precast concrete element 5 is internally provided with at least one precast channel 6 crossing the track 1.

As shown in fig. 1, the installation structure of the circulating water pipe sequentially comprises a track 1, a sleeper 2, a ballast cushion layer 3, a prefabricated layer and a sand cushion layer 4 from top to bottom. The track 1 is composed of two parallel steel rails, the steel rails are fixed above a plurality of sleepers 2, and a ballast cushion layer 3 is arranged below the sleepers 2. The ballast cushion layer 3 is formed by laying a plurality of small stones, and has the functions of supporting the sleeper 2, uniformly transmitting the huge pressure on the upper part of the sleeper 2 to the precast concrete member 5, fixing the position of the sleeper 2, preventing the sleeper 2 from moving longitudinally or transversely, and relieving the impact of locomotive wheels on the steel rail. Preferably, the thickness of the ballast cushion layer 3 is more than or equal to 400 mm.

The prefabricated layer comprises at least one prefabricated concrete member 5, the prefabricated concrete member 5 is a structural member which is prefabricated and formed before site construction, and the load calculation of the prefabricated concrete member should take the maximum dynamic load when the locomotive vehicle passes through the prefabricated concrete member when the locomotive vehicle passes through the prefabricated concrete member when. The arrangement of reinforcing steel bars is required to be carried out according to the design requirements in the precast concrete member 5, the maintenance is carried out according to the specifications after the integral pouring, and the strength after the forming is ensured to meet the design requirements. Each precast concrete element 5 has at least one precast channel 6 therein, the function of which channel 6 is to pass a circulating water pipe 13. The sand cushion layer 4 adopts medium coarse sand, broken stone and pebble with good gradation and hard texture, and is tamped in layers to be used as a bearing layer of the foundation, so that the bearing capacity of the foundation is improved, and the settlement of the foundation is reduced. Preferably, the thickness of the sand cushion layer 4 is more than or equal to 50 mm.

The utility model discloses circulating pipe's mounting structure's work progress as follows: firstly, selecting a construction position, and moving away a track 1 and a sleeper 2 at the construction position; then, downward excavation is carried out, a sand cushion layer 4 is paved at the bottom after the excavation is finished, the thickness of the sand cushion layer 4 is more than or equal to 50mm, and then the precast concrete member 5 is placed on the sand cushion layer 4 through hoisting equipment; then, a circulating water pipe 13 is penetrated into a prefabricated channel 6 of the prefabricated concrete member 5 by adopting a crane and a rolling bar; then backfilling sand, and paving a ballast cushion layer 3 on the top of the precast concrete member 5, wherein the thickness of the ballast cushion layer 3 is more than or equal to 400mm, and the top of the ballast cushion layer 3 is ensured to be consistent with the bottom elevation of the sleeper 2; the removed sleepers 2 and rails 1 are then installed to the original position, and thus the installation work of the circulating water pipe 13 is completed, which is constructed as shown in fig. 5.

In the follow-up extension project of large-scale coal fired power plant, adopt the utility model discloses circulating pipe's mounting structure through setting up precast concrete component 5, at the in-process of site operation, has practiced thrift the time of template construction and the setting time of concrete, can control circulating pipe 13's construction period within 5 days, compares with prior art, has shortened construction period greatly, has improved the efficiency of construction, is particularly useful for the less condition of storage coal yard storage capacity.

Precast concrete component 5 can be for whole prefabricated molding, but the structure after whole prefabricated molding is bulky, weight is big, and is all higher to the requirement of transportation and hoist and mount, and then can increase the safety risk when transporting and hoist. Therefore, in order to reduce the safety risk of the precast concrete unit 5 during transportation and hoisting, preferably, the precast concrete unit 5 includes at least two precast concrete pipe galleries 7 spliced in the width direction of the track 1, at least one pipe gallery hole 8 is provided in each precast concrete pipe gallery 7, and the pipe gallery holes 8 of the corresponding positions on all the precast concrete pipe galleries 7 form the precast channel 6. Fig. 3, fig. 4 are precast concrete pipe gallery 7's schematic structure, two pipe gallery holes 8 have in precast concrete pipe gallery 7. Through setting up a plurality of precast concrete pipe gallery 7, reduced the volume and the weight of every precast concrete pipe gallery 7, and then reduced the transportation and the hoist and mount requirement of every precast concrete pipe gallery 7, the security when having improved transportation and hoist. As shown in fig. 1 and 2, a plurality of precast concrete pipe galleries 7 are spliced to form the precast concrete members 5, and pipe gallery holes 8 at corresponding positions on the precast concrete pipe galleries 7 form two precast passages 6 for circulating water pipes 13 to pass through.

Preferably, the top of the precast concrete pipe gallery 7 is provided with an embedded part 9; the embedded parts 9 of the adjacent precast concrete pipe galleries 7 are fixedly connected through connecting parts 10. The embedded part 9 is a steel member pre-installed at the top of the precast concrete pipe gallery 7, so that installation and fixation of other steel structures are facilitated. In the embodiment of the present invention, the connecting member 10 is a steel, preferably a channel steel. During installation, as shown in fig. 1, one end of the connecting member 10 is welded on the embedded part 9 on the top of one of the precast concrete pipe galleries 7, and the other end of the connecting member 10 is welded on the embedded part 9 on the top of the other adjacent precast concrete pipe gallery 7, so as to realize connection of the adjacent precast concrete pipe galleries 7. Preferably, the joints of the adjacent precast concrete pipe galleries 7 are subjected to mortar pointing treatment.

In order to ensure that the elevations of the splicing ends of the adjacent precast concrete pipe galleries 7 are consistent when the adjacent precast concrete pipe galleries are spliced, as a preferable scheme, the precast concrete pipe gallery splicing structure further comprises a supporting beam 11 arranged at the splicing position of the adjacent precast concrete pipe galleries 7; one end of the supporting beam 11 is positioned below one precast concrete pipe gallery 7, and the other end of the supporting beam 11 is positioned below the other precast concrete pipe gallery 7. In the embodiment of the present invention, the supporting beam 11 is a steel, preferably a channel steel. During installation, as shown in fig. 1, the supporting beam 11 is firstly placed on the sand cushion layer 4, then the splicing end of one precast concrete pipe gallery 7 is placed above one end of the supporting beam 11, and the splicing end of the other precast concrete pipe gallery 7 is placed above the other end of the supporting beam 11; because the supporting beam 11 is a rigid member, the supporting beam 11 can ensure that the elevations of the splicing ends of the two adjacent precast concrete pipe galleries 7 are consistent. Preferably, at least two support beams 11 are provided below the splicing location of adjacent precast concrete pipe galleries 7.

Preferably, the two ends of the top of the precast concrete unit 5 are respectively provided with a stone blocking strip 12 extending along the length direction of the track 1. The stone blocking strips 12 can be integrally formed with the precast concrete members 5 during prefabrication; or may be installed on the top of the precast concrete unit 5 after the precast concrete unit 5 is precast. The material of the stone-blocking strip 12 may be a metal material, or may also be a non-metal material, and is not specifically limited herein. The stones in the stone ballast bed layer 3 are blocked through the stone blocking strips 12, the stones are prevented from falling from the two ends of the top of the precast concrete member 5, and the stability of the stone ballast bed layer 3 is improved.

Claims

1. The circulating water pipe mounting structure comprises a track (1), a sleeper (2) arranged below the track (1) and a ballast cushion layer (3) arranged below the sleeper (2); it is characterized in that a prefabricated layer is arranged below the stone slag cushion layer (3); a sand cushion layer (4) is arranged below the prefabricated layer; the precast layer comprises at least one precast concrete element (5), and the precast concrete element (5) is internally provided with at least one precast channel (6) crossing the track (1).

2. A circulating water pipe mounting structure according to claim 1, characterized in that the precast concrete member (5) comprises at least two precast concrete pipe galleries (7) spliced in the width direction of the track (1), each precast concrete pipe gallery (7) having at least one pipe gallery hole (8) therein, the pipe gallery holes (8) of the corresponding positions on all the precast concrete pipe galleries (7) constituting the precast channel (6).

3. The circulating water pipe installation structure according to claim 2, wherein the top of the precast concrete pipe gallery (7) has an embedment (9); the embedded parts (9) of the adjacent precast concrete pipe galleries (7) are fixedly connected through connecting parts (10).

4. A circulating water pipe installation structure according to claim 2, further comprising a support beam (11) provided at a splicing position of adjacent precast concrete pipe galleries (7); one end of the supporting beam (11) is positioned below one precast concrete pipe gallery (7), and the other end of the supporting beam (11) is positioned below the other precast concrete pipe gallery (7).

5. A circulating water pipe installation structure according to claim 1, 2, 3 or 4, wherein the precast concrete member (5) is provided at both ends of the top thereof with stone barriers (12) extending in the length direction of the track (1), respectively.

6. A circulating water pipe installation structure according to claim 1, 2, 3 or 4, characterized in that the thickness of the ballast bed (3) is not less than 400 mm.

7. A circulating water pipe installation structure according to claim 1, 2, 3 or 4, wherein the thickness of the sand cushion layer (4) is not less than 50 mm.