EP4350074A1

EP4350074A1 - Prefabricated track structure for built-in pump house section in rail transportation and construction method

Info

Publication number: EP4350074A1
Application number: EP23800304.0A
Authority: EP
Inventors: Peng Chen; Xiuren YANG; Jianzhong Wu; Shouwei Xu; Yuzhen DUAN; Hongliang Zhang; Daxin SUN; Beibei ZHAI; Lei JIAO; Guan LIU; Jingmin Li; Yu Zhu; Haibin Duan; Wei Li; Guangming Zhang; Kai Kang
Original assignee: Beijing Urban Construction Design And Development Group Co Ltd; Beijing Urban Construction Design and Development Group Co Ltd
Current assignee: Beijing Urban Construction Design And Development Group Co Ltd; Beijing Urban Construction Design and Development Group Co Ltd
Priority date: 2022-08-26
Filing date: 2023-05-22
Publication date: 2024-04-10
Also published as: CN115613398B; WO2024041054A1; CN115613398A

Abstract

Provided are a prefabricated track structure for built-in pump room section of rail transit and construction method therefor. The track structure includes steel rail, fasteners, prefabricated I-shaped track plate and filling adjustment layer from top to bottom. The steel rail is fixed on the upper surface of the prefabricated I-shaped track plate through the fasteners on both sides. A filling adjustment layer is provided below the prefabricated I-shaped track plate. The prefabricated I-shaped track plate includes a rail bearing platform and a prefabricated plate, both of which are formed in one piece. The plane of the prefabricated I-shaped track plate is an I-shaped structure, the middle of which is connected by a crossbeam. The invention is used in the rail transit field to replace the traditional cast-in-place built-in pump room roadbed, and has advantages of simple construction procedure, fast construction speed, high construction precision, low labor intensity, good aesthetics, good durability and the like. It is consistent with expectations of environmental protection, high efficiency and disease reduction of the current rail transit, and has great social benefits.

Description

TECHNICAL FIELD OF THE INVENTIION

The invention relates to the technical field of building engineering, in particular to prefabricated track structure for built-in pump room section of rail transit and construction method therefor.

BACKGROUND OF THE INVENTIION

Currently, cast-in-situ concrete ballast beds are widely used in built-in pump room section of rail transit, with problems such as poor construction quality, large manpower consumption, slow construction speed, and poor precision of reserved water pipes, resulting in frequent water accumulation and poor durability of the ballast bed. Further, the track bed is prone to problems such as falling blocks, cracks, voids, and heavy maintenance and repair workload after operation.

SUMMARY OF AN EMBODIMENT OF THE INVENTION

In view of above, inventors of the present invention researched and designed a prefabricated track structure for built-in pump room section of rail transit and construction method therefor, through carefully research and design, and comprehensive long-term experience and achievements in related industries for many years, to overcome the above-mentioned defects.
An object of the invention is to provide a prefabricated track structure and construction method for built-in pump room section of rail transit, which can effectively solve the existing technical problems such as poor construction quality, large manpower consumption, slow construction speed, and poor precision of reserved water pipes, resulting in frequent water accumulation and poor durability of the ballast bed, and that the existing track bed is prone to problems such as falling blocks, cracks, voids, and heavy maintenance and repair workload after operation.
In order to achieve above object, the present invention discloses a prefabricated track structure for built-in pump room section of rail transit, which comprises rails, fasteners, a prefabricated I-shaped track plate and a filling adjustment layer, sequentially from top to bottom. Said rail is fixed on the upper surface of the prefabricated I-shaped track plate through the fasteners on both sides, and the lower part of the prefabricated I-shaped track plate is provided with a filling adjustment layer, characterized in that:
The prefabricated I-shaped track plate includes a rail bearing platform and a prefabricated plate, which are formed in one piece, the plane of the prefabricated I-shaped track plate is an I-shaped structure, the middle of which is connected with a beam, and two ends of the beam in the middle are U-shaped openings, thereby forming a U-shaped catchment pit in the middle, section of the prefabricated I-shaped track plate is polygonal, and lower surface of both sides is provided with a slope surface structure to enhance the adaptability to the tunnel section, the filling adjustment layer are filled between bottom of the prefabricated I-shaped track plate and a shield segment.
Plate side of the prefabricated I-shaped track plate is respectively provided with a lifting sleeve;

wherein the top surface of the U-shaped opening of the prefabricated I-shaped track plate is provided with a ditch cover plate for patrol personnel walking or evacuation in case of emergency;
wherein both of a joint between the prefabricated I-shaped track plate and the filling adjustment layer, and a joint between the filling adjustment layer and the shield segment are provided with sealed waterproof materials for sealing;
wherein the bottom of a filling adjustment layer under a middle beam of the prefabricated I-shaped track plate is pre-embedded with a water pipe so that the U-shaped catchment pit are connected with each other;
wherein the bottom of the prefabricated I-shaped track plate is reserved for or implanted with steel bar;
wherein the filling adjustment layer is made with material of steel fiber reinforced fine stone concrete, self-compacting concrete or special mortar;
wherein the water pipe is round shape or polygonal shape.

The present invention further discloses a construction method for a prefabricated track structure construction method for built-in pump room section of rail transit, comprising following steps:

Step 1: prefabricating I-shaped track plate, completing processing of track plate grinding tools, steel bar binding, concrete pouring for the prefabricated plate in a factory, and preserve health of the track plate after completing prefabrication to form the prefabricated I-shaped track plate with high precision;
Step 2: transporting and hoisting, in which the prefabricated I-shaped track plate is transported to a working surface for laying the track, to be positioned roughly; Step 3: finely adjusting the prefabricated I-shaped track plate;
Step 4: positioning and fixing the prefabricated I-shaped track plate, in which the prefabricated I-shaped track plate after fine adjustment is supported and fixed by a frame plate support;
Step 5: binding steel bar and pre-burying water pipe;
Step 6: setting a formwork around built-in pump pit at the bottom of the track plate;
Step 7: pouring and curing concrete in a filling adjustment layer;
Step 8: installing fastener;
Step 9: installing steel rails;
Step 10: ancillary construction.

In view of above, the prefabricated track structure for built-in pump room section of rail transit and construction method therefor of the present invention shows following advantages:

1. It is benefited from the prefabricated I-shape track plate in the section of the ballast built-in pump room and construction method therefor, that amount of steel bar binding and concrete pouring is greatly reduced;
2. It has advantages of simple construction procedure, low labor intensity, high construction precision, high construction efficiency, good durability and so on, which solves many defects in the track structure of cast-in-place built-in pump room;
3. It can effectively replace the traditional track bed with cast-in-place built-in pump room, which is consistent with expectations of environmental protection, high efficiency and disease reduction of the current rail transit, and has great social benefits;

The details of the present invention can be obtained through the later description and accompanying drawings.

DESCRIPTION OF THE FIGURES

Fig. 1 shows a front view of the prefabricated track structure for built-in pump room section of rail transit according to an embodiment of the present invention;
Fig. 2 shows a top view according to an embodiment of the present invention.

DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION

Referring to Figs. 1 and 2, the prefabricated track structure for built-in pump room section of rail transit according to an embodiment of the present invention is shown.
The prefabricated track structure for built-in pump room section of rail transit includes steel rails 1, fasteners 2, prefabricated I-shaped track plates 3 and filling adjustment layer 7 from top to bottom. The steel rails 1 is fixed on the upper surface of the prefabricated I-shaped track plates 3 through the fasteners 2 on both sides. A filling adjustment layer 7 is provided below the prefabricated I-shaped track plates 3. The prefabricated I-shaped track plates 3 includes a rail bearing platform and a prefabricated plate, both of which are formed in one piece. The plane of the prefabricated I-shaped track plates 3 is an I-shaped structure (as shown in the top view of Fig. 2), the middle of which is connected by a crossbeam, both ends of the crossbeam in the middle are U-shaped openings, thereby forming a U-shaped catchment pit in the middle. The section of the prefabricated I-shaped track plates 3 is polygonal, and the lower surfaces on both sides are provided with slope surface structures to enhance the adaptability to the tunnel section.
The prefabricated I-shaped track plates 3 is connected by a crossbeam and with I-shaped appearance, the filling adjustment layer 7 is only poured in the lower part of the I-shaped structure and is not poured within the range of U-shaped openings at both ends of the crossbeam. As a result, equipment such as pumping pump can be set up within the scope of the U-shaped structure.
An adjustment layer 7 are filled between the bottom of the prefabricated I-shaped track plates 3 and the shield pipe segment. The filling adjustment layer 7 is made of steel fiber reinforced fine stone concrete.
The plate sides of the prefabricated I-shaped track plates 3 are respectively provided with lifting sleeves 5 for fixing the prefabricated I-shaped track plates 3.
The top surface of the U-shaped opening of the prefabricated I-shaped track plates 3 is provided with a ditch cover plate 4, which is used for patrol personnel walking or evacuation in case of emergency.
Both of a joint between the prefabricated I-shaped track plates 3 and the filling adjustment layer 7, and a joint between the filling adjustment layer 7 and the shield segment are provided with sealed waterproof materials 6 for sealing.
The bottom of a filling adjustment layer under a middle beam of the prefabricated I-shaped track plate is pre-embedded with a water pipe 9 so that the U-shaped catchment pits 8 are connected with each other.
The range of the shield segment at the bottom of the prefabricated I-shaped track plates 3 can be reserved for or implanted with steel bar to strengthen the connection between the track bed and the shield segment.
The filling adjustment layer can be made with material of steel fiber reinforced fine stone concrete, self-compacting concrete or special mortar and so on, with good fluidity.
The plate side or the upper surface of the prefabricated I-shaped track plates 3 is provided with a lifting sleeve and other devices for hoisting or fixing the track plate.
The water pipe can be round or polygonal shape.
The construction method for a prefabricated track structure construction method for built-in pump room section of rail transit according to an embodiment of the present invention includes following steps:

Step 1: prefabricating I-shaped track plate 3, in which processing of track plate grinding tools, steel bar binding, concrete pouring for the prefabricated plate in a factory are completed, and health preservation of the track plate after completing prefabrication is carried out, to form the prefabricated I-shaped track plates 3 with high precision;
Step 2: transporting and hoisting, in which the prefabricated I-shaped track plates 3 is transported to the construction site by a vehicle, and transported to the track laying surface by a cart, then positioned roughly;
Step 3: finely adjusting the prefabricated I-shaped track plates 3, in which fine adjustment of prefabricated I-shaped track plates 3 is performed with small gantry crane;
Step 4: positioning and fixing the prefabricated I-shaped track plates 3, in which the prefabricated I-shaped track plate after fine adjustment is supported and fixed by a frame plate support, each prefabricated I-shaped track plates 3 is provided with 4 or more support points as needed;
Step 5: binding steel bar and pre-burying water pipe 9, in which after the steel bar is bound, the water pipe 9 is pre-buried in the crossbeam of the prefabricated I-shaped track plates 3;
Step 6: setting a formwork around built-in pump pit at the bottom of the track plate, in which after the prefabricated I-shaped track plates 3 is fixed, the pump pit formwork in the section of the built-in pump room is installed;
Step 7: pouring and curing concrete in a filling adjustment layer, in which after cleaning the stagnant water at the bottom of the board, the filling adjustment layer 7 is poured, and after the filling adjustment layer 7 reaches a certain strength, the supporting device for the prefabricated plate set up in Step 4 is taken out;
Step 8: installing fastener, in which after the filling adjustment layer 7 reaches a certain strength, the upper fastener is installed, and the installation is in order of the elastic cushion plate under the iron cushion plate, the iron cushion plate, and the elastic cushion plate under the rail;
Step 9: installing steel rails, in which the rail is transported to the working surface by the rail transport vehicle, and the rail is unloaded to the installation point by the rail transport vehicle to spread out, the rail is put into the rail bearing groove of the fastener iron cushion plate, and the fastener parts such as gauge block, connecting bolt and elastic bar are installed;
Step 10: ancillary construction, in which after the construction of the main structure, waterproof material is brushed in the pump pit and a ditch cover plate in the upper surface is installed.

It can be seen that the invention is used in the rail transit field to replace the traditional cast-in-place built-in pump room roadbed, and has advantages of simple construction procedure, fast construction speed, high construction precision, low labor intensity, good aesthetics, good durability and the like. It is consistent with expectations of environmental protection, high efficiency and disease reduction of the current rail transit, and has great social benefits.
It is obvious that the above descriptions and records are only examples and are not intended to limit the disclosure, application or use of the present invention. Although the embodiments have been described in the embodiments and described in the drawings, the present invention does not limit the specific examples described by the examples of the drawings and described in the embodiments as currently considered the best mode to implement the teachings of the invention, the scope of the present invention will include any embodiments falling into the previous specification and the accompanying claims.

Claims

A prefabricated track structure for built-in pump room section of rail transit, which comprises rails, fasteners, a prefabricated I-shaped track plate and a filling adjustment layer sequentially from top to bottom, wherein the rails are fixed on the upper surface of the prefabricated I-shaped track plate through the fasteners on both sides, and lower part of the prefabricated I-shaped track plate is provided with the filling adjustment layer, characterized in that:
the prefabricated I-shaped track plate includes a rail bearing platform and a prefabricated plate which are formed in one piece, plane of the prefabricated I-shaped track plate is an I-shaped structure, middle of which is connected with a beam, and two ends of the beam in the middle are U-shaped openings, thereby forming a U-shaped catchment pit in the middle, section of the prefabricated I-shaped track plate is polygonal, and lower surface of both sides is provided with a slope surface structure to enhance adaptability to tunnel section, the filling adjustment layer are filled between bottom of the prefabricated I-shaped track plate and a shield segment.
The prefabricated track structure for built-in pump room section of rail transit of Claim 1, wherein plate sides of the prefabricated I-shaped track plate are respectively provided with lifting sleeves.
The prefabricated track structure for built-in pump room section of rail transit of Claim 1, wherein a top surface of the U-shaped opening of the prefabricated I-shaped track plate is provided with a ditch cover plate for patrol personnel walking or evacuation in case of emergency.
The prefabricated track structure for built-in pump room section of rail transit of Claim 1, wherein both of a joint between the prefabricated I-shaped track plate and the filling adjustment layer, and a joint between the filling adjustment layer and the shield segment are provided with sealed waterproof materials for sealing.
The prefabricated track structure for built-in pump room section of rail transit of Claim 1, wherein bottom of the filling adjustment layer under the beam in the middle of the prefabricated I-shaped track plate is pre-embedded with a water pipe so that the U-shaped catchment pits are connected with each other.
The prefabricated track structure for built-in pump room section of rail transit of Claim 1, wherein the bottom of the prefabricated I-shaped track plate is reserved for or implanted with a steel bar.
The prefabricated track structure for built-in pump room section of rail transit of Claim 1, wherein the filling adjustment layer is made with material of steel fiber reinforced fine stone concrete, self-compacting concrete or special mortar.
The prefabricated track structure for built-in pump room section of rail transit of Claim 5, wherein the water pipe is round shape or polygonal shape.
A construction method for a prefabricated track structure construction method for built-in pump room section of rail transit, characterized by comprising following steps:
Step 1 of prefabricating I-shaped track plates, in which processing of track plate grinding tools, steel bar binding, concrete pouring for the prefabricated plate are completed in a factory, and health preservation of the track plate is carried out after completing prefabrication, to form the prefabricated I-shaped track plate with high precision;

Step 2 of transporting and hoisting, in which the prefabricated I-shaped track plate is transported to a working surface for laying the track, to be positioned roughly;

Step 3 of finely adjusting the prefabricated I-shaped track plate;

Step 4 of positioning and fixing the prefabricated I-shaped track plate, in which the prefabricated I-shaped track plate after fine adjustment is supported and fixed by a frame plate support;

Step 5 of binding steel bar and pre-burying water pipe;

Step 6 of setting a formwork around built-in pump pit at the bottom of the track plate;

Step 7 of pouring and curing concrete in a filling adjustment layer;

Step 8 of installing fasteners;

Step 9 of installing steel rails;

Step 10 of ancillary construction.