A prefabricated and assembled vehicle depot inspection tunnel bed and construction method

Abstract

A prefabricated and assembled inspection pit bed within a vehicle depot and its construction method include precast concrete side walls (a) and (b) two precast concrete side walls, precast concrete columns, a precast concrete floor, an assembled water ditch body, a water ditch cover, and connecting steel rods (a) and (b) (c) three. The pit bed is assembled into a wall-type inspection pit, a column-type inspection pit, or a half-wall, half-column inspection pit bed. Fasteners are embedded in the side walls and the tops of the columns, and sleeves are installed. The fasteners and rails are then installed. This invention addresses the technical issues of traditional cast-in-place inspection pit bed structures, such as difficulty ensuring construction accuracy due to engineering interface divisions, as well as the relatively complex shape, heavy weight, and difficulty in transportation, on-site hoisting, and positioning of existing prefabricated inspection pit beds. This ensures construction accuracy, simplicity, and speed.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation technology, and in particular to providing a prefabricated and assembled vehicle depot in-building inspection pit bed and a construction method. Background Art

[0002] Inspection pits are widely used in various rail transit depots across China. These pits primarily include pillar-type, wall-type, or half-wall, half-pillar-type structures, designed to meet specific process requirements. Currently, these pits are commonly constructed using cast-in-place concrete, which presents numerous structural issues. While prefabricated pillar-type pits are now available, the substructure often utilizes a monolithic U-shaped liquid structure, which is detrimental to production and transportation, and also fails to adequately consider drainage within the pit.

[0003] 1. The main problems of cast-in-place inspection pit bed (pillar inspection pit, wall inspection pit, half-wall and half-pillar inspection pit) include:

[0004] (1) The professional interface division is unclear and the design interface design scheme is complex. The scope of track professional construction is 500mm below the track surface. The substructure (pit bottom, pit wall, and some columns) are all constructed by the civil engineering department, and connecting steel bars are reserved for the track department. Due to the differences in construction control accuracy and acceptance requirements of different professional departments, there are common deviations between the substructure reservation and the track connection on site. The quality of the project is difficult to guarantee, which directly affects the inspection of the tunnel bed structure strength and stability.

[0005] (2) Low construction efficiency, complex process flow and molds. The cast-in-place inspection pit track structure has the technical problems of cast-in-place concrete structure itself, such as many types and large quantities of on-site support molds, a large amount of steel bars and a large amount of binding work, a large amount of on-site concrete pouring, and a large amount of concrete maintenance work. Especially for the columnar inspection pit structure, each column requires an independent template, and the related problems are more significant. At the same time, the traditional inspection pit track bed requires the cooperation of two majors, civil engineering and track. All processes such as steel bar binding and template support need to be completed separately. There are many construction processes and complex construction processes. It mainly relies on manual laying, with a low degree of mechanization and slow construction progress.

[0006] (3) Construction accuracy is difficult to guarantee. The construction error of the track structure is at the millimeter level, which is significantly stricter than the construction accuracy of the civil engineering unit. The inspection tunnel bed accuracy depends on the construction quality of the columns and the lower foundation. The number of cast-in-place concrete structures is large, and the cumulative error is large. Especially for the column-type inspection pit structure, it is difficult to meet the track accuracy requirements. In addition, cast-in-place concrete columns are mainly manual labor, and the construction quality is greatly affected by the individual factors of the workers.

[0007] (4) Relatively poor aesthetics. In traditional inspection pit structures, the civil engineering profession is responsible for the lower structure, while the track profession is responsible for the upper 500m. There will inevitably be a joint interface between the two professions. Due to the use of cast-in-place technology and the influence of varying degrees of cumulative errors, problems such as misaligned teeth are common at the interface. Due to problems with the quality of concrete construction, there are also problems such as mold running, corner loss, and honeycombed surfaces. In addition, a large amount of concrete is poured on site during construction, which causes contamination of rails, fasteners and other track components, making cleaning inconvenient. The above problems directly affect the aesthetics of the track structure.

[0008] (5) The protective layer on the side of the sleeper in the wall-type inspection pit close to the track centerline is too thin. In order to ensure the working width in the pit, the traditional wall-type inspection pit structure results in the concrete thickness of the sleeper close to the track centerline being less than 50mm. Peeling and falling off are common on site, which poses a risk of affecting the connection strength between the sleeper and the trackbed, which is detrimental to safe operation.

[0009] (6) Inconvenience in maintenance and repair. This problem mainly occurs in the column inspection pit. The columns of the traditional column inspection pit are cast-in-place structures and are cast separately by two professionals. The strength and durability are not easy to guarantee. If the columns are damaged or cracked after operation, the maintenance and repair of the columns are extremely inconvenient. Moreover, as the operation time increases, the line status, such as the track gauge and track direction, will be greatly deformed and exceed the adjustment capacity of the fasteners, and the line status cannot be restored.

[0010] (7) The construction working environment is poor. During the construction of traditional cast-in-place concrete inspection tunnel bed, there will be a lot of dust pollution, and the working environment of construction workers is difficult to ensure, which is easy to affect the health of workers.

[0011] 2. The main problems of existing prefabricated inspection tunnel beds include:

[0012] (1) The prefabricated components of the existing prefabricated inspection pit bed are relatively complex in shape and heavy in weight, making transportation, on-site hoisting, and positioning difficult. The lower structure of the traditional prefabricated wall-type inspection pit floor and side walls, or column-type inspection pit / half-wall and half-column-type inspection pit is usually designed as a whole, with an overall U-shaped structure. Only the prefabricated column-type inspection pit and the lower foundation form a simple "assembly relationship", and the rest of the parts are produced as a whole. During the factory prefabrication process, the mold is relatively complex and the production speed is relatively slow. In addition, since the floor and side walls are integrated, they are heavy in weight and have a special shape, which makes them inconvenient for transportation and on-site hoisting construction.

[0013] (2) The existing prefabricated inspection pit structure cannot be equipped with a roadbed ditch structure. The existing prefabricated inspection pit structure generally does not consider the drainage system inside the inspection pit, and fails to meet the drainage requirements of the inspection pit cleaning operation in the inspection process, which is not conducive to the subsequent operation and maintenance.

[0014] (3) During the construction process, there are relatively few ways to adjust the geometry of the track in the existing prefabricated inspection pit structure. The geometric shape of the prefabricated inspection pit structure with columns is generally adjusted by adjusting the lower part of the column. The prefabricated wall inspection pit with columns is adjusted and positioned using the traditional track arrangement method. Due to the heavy weight of the prefabricated structure, on-site adjustment is relatively difficult.

[0015] In view of the above problems, the present invention provides a prefabricated inspection tunnel bed structure that can be flexibly assembled and a construction method thereof. Summary of the Invention

[0016] The present invention provides a prefabricated and assembled inspection tunnel bed in a vehicle depot and a construction method, which aims to solve a series of technical problems such as the difficulty in ensuring construction accuracy caused by the engineering interface division of the traditional cast-in-place inspection tunnel bed structure, and the technical problems of the existing prefabricated inspection tunnel bed, such as the relatively complex shape, relatively large weight, and difficulty in transportation, on-site lifting, and positioning.

[0017] The technical solutions of the present invention are as follows:

[0018] A prefabricated and assembled type vehicle depot inspection pit bed of the present invention is characterized in that it comprises two parallel and oppositely arranged side walls, namely, precast concrete side wall 1 and precast concrete side wall 2, wherein rail support platforms 12 are correspondingly arranged on the tops of the two side walls, and fastener installation sleeves are pre-embedded in the range of the rail support platforms 12; steel rails 100 are installed on the rail support platforms and fasteners are installed to connect and fix them;

[0019] At least two corresponding through holes 14 are reserved at the lower part of the two side walls. The two ends of two parallel and transverse connecting steel rods 5 are respectively passed through the holes on the two side walls. The fixing nuts 10 are sleeved on the ends of the connecting steel rods on the outside of the side walls and tightened to clamp the two side walls to the two sides of the precast concrete base plate 3; the connecting steel rods 5 lie in the grooves at the bottom of the two precast concrete base plates 3;

[0020] Two precast concrete bottom plates 3 are arranged in parallel between the two side walls and are respectively close to the lower parts of the two side walls, so that a longitudinal groove is formed between the two precast concrete bottom plates. A plurality of connecting steel rods 3 7 are arranged in parallel in the transverse direction in the groove, and the ends of the connecting steel rods 3 7 are respectively connected and fixed to the precast concrete bottom plates on both sides. The connecting steel rods 3 7 are arranged in two layers in the upper and lower directions; connecting steel rods 2 6 are placed in two grooves arranged in the transverse direction on the upper surfaces of the two precast concrete bottom plates, and the ends of the connecting steel rods 2 6 are connected and fixed to the precast concrete side wall 1 and the precast concrete side wall 2;

[0021] The assembled water ditch body 8 is embedded in the ditch between the upper and lower connecting steel rods 3 7, and is suspended on the connecting steel rod 2 6 or the upper connecting steel rod 3 7 and is tilted according to a preset drainage slope. The ditch cover 13 is embedded in the ditch and supported and fixed on the connecting steel rod 2 6 and the upper connecting steel rod 3 7.

[0022] A prefabricated and assembled vehicle depot inspection tunnel bed of the present invention is characterized in that it includes two parallel and oppositely arranged side walls, namely, precast concrete side wall 1 and precast concrete side wall 2, two precast concrete columns 4 are provided on the top of each side wall, and the tops of the two side walls are provided correspondingly; a flange 9 is integrally connected to the lower part of the column, and the flange is fixedly connected to the tops of the two side walls by anchor bolts 11; the tops of the precast concrete columns 4 correspond to the embedded fastener installation sleeves and the fasteners and rails are installed;

[0023] At least two corresponding through holes 14 are reserved at the lower part of the two side walls. The two ends of two parallel and transverse connecting steel rods 5 are respectively passed through the holes on the two side walls. The fixing nuts 10 are sleeved on the ends of the connecting steel rods on the outside of the side walls and tightened to clamp the two side walls to the two sides of the precast concrete base plate 3; the connecting steel rods 5 lie in the grooves at the bottom of the two precast concrete base plates 3;

[0024] Two precast concrete bottom plates 3 are arranged in parallel between the two side walls and are respectively close to the lower parts of the two side walls, so that a longitudinal groove is formed between the two precast concrete bottom plates. A plurality of connecting steel rods 3 7 are arranged in parallel in the transverse direction in the groove, and the ends of the connecting steel rods 3 7 are respectively connected and fixed to the precast concrete bottom plates on both sides. The connecting steel rods 3 7 are arranged in two layers in the upper and lower directions; connecting steel rods 2 6 are placed in two grooves arranged in the transverse direction on the upper surfaces of the two precast concrete bottom plates, and the ends of the connecting steel rods 2 6 are connected and fixed to the precast concrete side wall 1 and the precast concrete side wall 2;

[0025] The assembled water ditch body 8 is embedded in the ditch between the upper and lower connecting steel rods 3 7, and is suspended on the connecting steel rod 2 6 or the upper connecting steel rod 3 7 and is tilted according to a preset drainage slope. The ditch cover 13 is embedded in the ditch and supported and fixed on the connecting steel rod 2 6 and the upper connecting steel rod 3 7.

[0026] A prefabricated and assembled vehicle depot inspection tunnel bed of the present invention is characterized in that it includes two parallel and oppositely arranged precast concrete side wall 1 and precast concrete side wall 2, two precast concrete columns 4 are provided on the top of one of the two side walls and are at the same height as the opposite side wall, the lower part of the column is integrally connected to the flange 9, and the flange is fixedly connected to the top of the wall by anchor bolts 11; embedded fastener installation sleeves are provided on the top of the precast concrete columns and the opposite side wall, and fasteners and rails are installed;

[0027] At least two corresponding through holes 14 are reserved at the lower part of the two side walls. The two ends of two parallel and transverse connecting steel rods 5 are respectively passed through the holes on the two side walls. The fixing nuts 10 are sleeved on the ends of the connecting steel rods on the outside of the side walls and tightened to clamp the two side walls to the two sides of the precast concrete base plate 3; the connecting steel rods 5 lie in the grooves at the bottom of the two precast concrete base plates 3;

[0028] Two precast concrete bottom plates 3 are arranged in parallel between the two side walls and are respectively close to the lower parts of the two side walls, so that a longitudinal groove is formed between the two precast concrete bottom plates. A plurality of connecting steel rods 3 7 are arranged in parallel in the transverse direction in the groove, and the ends of the connecting steel rods 3 7 are respectively connected and fixed to the precast concrete bottom plates on both sides. The connecting steel rods 3 7 are arranged in two layers in the upper and lower directions; connecting steel rods 2 6 are placed in two grooves arranged in the transverse direction on the upper surfaces of the two precast concrete bottom plates, and the ends of the connecting steel rods 2 6 are connected and fixed to the precast concrete side wall 1 and the precast concrete side wall 2;

[0029] The assembled water ditch body 8 is embedded in the ditch between the upper and lower connecting steel rods 3 7, and is suspended on the connecting steel rod 2 6 or the upper connecting steel rod 3 7 and is tilted according to a preset drainage slope. The ditch cover 13 is embedded in the ditch and supported and fixed on the connecting steel rod 2 6 and the upper connecting steel rod 3 7.

[0030] The present invention provides a method for constructing a prefabricated and assembled vehicle depot inspection pit bed, which is characterized by comprising the following steps:

[0031] (1) Prefabricated parts are first produced in the factory: precast concrete bottom plate, precast concrete side wall, precast concrete column, connecting steel rods 1, 2, 3, water ditch body, and water ditch cover;

[0032] (2) Check the pit assembly, positioning and fixing,

[0033] 1) Connect the precast concrete side wall 1 and the precast concrete side wall 2 with two connecting steel rods 5;

[0034] 2) Connect the precast concrete base plate 3 with 6 connecting steel rods 3 7;

[0035] 3) Installing the structure assembled in step 2) within the structure formed by precast concrete side wall 1 and precast concrete side wall 2 in step 1), and then using two connecting steel rods 2 6 to reinforce and securely connect the structure assembled in step 2 to the structure assembled in step 1;

[0036] 4) Hoist the water ditch body on the connecting steel rod 2 6 or the connecting steel rod 3 7 according to the designed slope;

[0037] 5) Embed fasteners and installation sleeves on the precast concrete side wall 1, precast concrete side wall 2, or precast concrete columns, and install fasteners and rails on the precast concrete side wall 1, precast concrete side wall 2, or precast concrete columns; the precast concrete side wall 1, precast concrete side wall 2, or precast concrete columns 4 are combined into a column-type inspection pit, a wall-type inspection pit, or a half-wall and half-column inspection pit;

[0038] 6) Position the structures assembled in steps 1), 2), and 3) according to the line type and track geometry requirements. Once the standards are met, use self-compacting concrete or other filling materials to grout the bottom of the precast base plate and the outside of the side walls to complete the construction.

[0039] This invention optimizes the traditional cast-in-place inspection pit system into a prefabricated, assembled structure. Each section utilizes prefabricated components of appropriate size and shape, with pre-defined connection interfaces. Once delivered to the site, the prefabricated components can be assembled and combined as needed to form a "wall-type inspection pit," "column-type inspection pit," or "half-wall, half-column-type inspection pit" roadbed. After assembly and positioning, the lower floor and exterior side walls are filled with self-compacting concrete or other filling materials to complete the construction. Pre-defined connections for pipelines, lighting, and drainage are also reserved.

[0040] The present invention mainly includes wall-type inspection pits, column-type inspection pits, and half-wall and half-column inspection pits. The main structural parts are all prefabricated in the factory, which optimizes the shape and size of prefabricated components, simplifies the production process, reduces the weight of each part, and facilitates production and transportation. At the same time, the main structures of different roadbed structures can be flexibly assembled and assembled into wall-type, column-type, and half-wall and half-column inspection pit structures according to different needs, realizing the "assembly" and "standardization" of the main structures to a certain extent, and significantly improving the speed of on-site construction. At the same time, in view of the situation where the existing prefabricated roadbed structure cannot be set with a ditch, a prefabricated, slope-adjustable prefabricated ditch body matching this example is provided, breaking through the technical bottleneck that the existing inspection pit roadbed structure cannot be set with a ditch structure.

[0041] Beneficial effects of the present invention:

[0042] (1) The entire inspection pit track structure is constructed entirely by track professionals, which solves a series of problems caused by the engineering interface division of traditional cast-in-place structures.

[0043] (2) The use of factory prefabrication significantly reduces the amount of concrete cast on site. At the same time, there is no need to carry out operations such as steel bar tying on site, which significantly improves production efficiency.

[0044] (3) The main structure is prefabricated in the factory, which effectively solves technical problems such as poor structural accuracy and stability caused by human factors on site.

[0045] (4) The main structure of the inspection pit is prefabricated, which effectively solves the problems of misalignment at the interface division of the cast-in-place structure, as well as mold running and block peeling of the cast-in-place structure, and significantly improves the aesthetics and durability.

[0046] (5) The rail support platform is directly formed during the prefabrication process of the side wall of the wall-type inspection pit, which breaks through the technical problem of the thin concrete protective layer on the side of the traditional wall-type inspection pit sleeper close to the center line of the line, and significantly improves the durability and stability of the structure.

[0047] (6) Prefabricated components have good stability and uniformity, and their structural strength and durability are guaranteed, which significantly reduces the workload of subsequent operation and maintenance.

[0048] (7) The amount of cast-in-place concrete on site is greatly reduced, which significantly improves the on-site construction environment and is beneficial to protecting the health of construction workers.

[0049] (8) It can be assembled and combined according to actual needs to form a "wall-type inspection pit", "column-type inspection pit" and "half-wall and half-column-type inspection pit" roadbed, realizing "assembly" and "standardization" and significantly improving the speed of on-site construction.

[0050] (9) The ditch adopts a prefabricated structure and is installed between two prefabricated base plates according to the designed drainage slope to form a roadbed ditch structure, realizing the drainage function of the prefabricated inspection pit roadbed structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 Assembly diagram of the prefabricated assembled wall-type inspection assembly pit of the present invention.

[0052] Figure 2 Schematic diagram of the assembly of the prefabricated column-type inspection pit of the present invention.

[0053] Figure 3 Schematic diagram of the assembly of the prefabricated half-wall, half-column inspection pit of the present invention.

[0054] Figure 4 Schematic diagram of the decomposition of the prefabricated half-wall and half-column inspection pit of the present invention.

[0055] Figure 5 Schematic diagram of the spatial position of the water ditch body and other parts of the present invention.

[0056] Description of the accompanying figures:

[0057] 1. Precast concrete side wall 1, 2. Precast concrete side wall 2, 3. Precast concrete base plate, 4. Precast concrete column, 5. Connecting steel rod 1, 6. Connecting steel rod 2, 7. Connecting steel rod 3, 8. Precast water channel, 9. Flange, 10. Fixing nut, 11. (Precast concrete column) anchor bolt, 12. Rail support, 13. Water channel cover, 14. Hole, 100. Rail DETAILED DESCRIPTION

[0058] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0059] See also Figure 1 As shown, a prefabricated and assembled vehicle depot inspection tunnel bed of the present invention is a prefabricated wall-type inspection tunnel bed, which includes two parallel and oppositely arranged precast concrete side wall 1 and precast concrete side wall 2. Rail support platforms 12 are correspondingly arranged on the tops of the two side walls, and fastener installation sleeves are pre-embedded in the range of the rail support platforms 12; rails 100 are installed on the rail support platforms and fasteners are installed to connect and fix them; the rail support platforms and the installation of rails are implemented according to the existing wall-type inspection tunnel bed or conventional installation methods and will not be repeated;

[0060] See also Figure 4 、 5 As shown, at least two through holes 14 are reserved in the lower part of the two side walls, and the two ends of two parallel and transverse connecting steel rods 5 are respectively passed through the holes on the two side walls. The fixing nuts 10 are sleeved on the ends of the connecting steel rods on the outside of the side walls and tightened to clamp the two side walls to the two sides of the precast concrete base plate 3; the connecting steel rods 5 lie in the grooves at the bottom of the two precast concrete base plates 3;

[0061] Two precast concrete bottom plates 3 are arranged in parallel between the two side walls and are respectively close to the lower parts of the two side walls, so that a longitudinal groove is formed between the two precast concrete bottom plates. A plurality of connecting steel rods 3 7 are arranged in parallel in the transverse direction in the groove, and the two ends are respectively connected and fixed to the precast concrete bottom plates on both sides for limiting. The precast concrete bottom plates 3 can be clamped by adjusting the fixing nuts 10. The precast flange connecting plates at the ends of the connecting steel rods 3 7 and the connecting holes thereon are connected to the wall surface by bolts; the connecting steel rods 3 7 are arranged in two layers in correspondence with each other; the connecting steel rods 2 6 are laid in the two grooves arranged transversely on the upper surfaces of the two precast concrete bottom plates, and the two ends of the connecting steel rods 2 6 are connected and fixed to the precast concrete side wall 1 and the precast concrete side wall 2, and the connection and fixing method is the same as that of the connecting steel rods 3 7;

[0062] The assembled water ditch body 8 is embedded in the ditch between the upper and lower connecting steel rods 3 7, and is suspended on the connecting steel rod 2 6 or the upper connecting steel rod 3 7 and is tilted according to a preset drainage slope. The ditch cover 13 is embedded in the ditch and supported and fixed on the connecting steel rod 2 6 and the upper connecting steel rod 3 7.

[0063] See also Figure 2As shown, a prefabricated assembled vehicle depot inspection tunnel bed of the present invention is a prefabricated column-type inspection tunnel bed, which includes two parallel and oppositely arranged precast concrete side wall 1 and precast concrete side wall 2, two precast concrete columns 4 are arranged on the top of each side wall, and the tops of the two side walls are arranged correspondingly; a flange 9 is integrally connected to the lower part of the column, and the flange is fixedly connected to the top of the two side walls by anchor bolts 11; the top of the precast concrete column 4 corresponds to the embedded fastener installation sleeve and the fastener and rail are installed; wherein the embedded fastener installation sleeve and the installation of the fastener and rail are implemented according to the column-type inspection tunnel bed or conventional installation method of the prior art, which will not be repeated here;

[0064] See also Figure 4 、 5 As shown, at least two through holes 14 are reserved in the lower part of the two side walls, and the two ends of two parallel and transverse connecting steel rods 5 are respectively passed through the holes on the two side walls. The fixing nuts 10 are sleeved on the ends of the connecting steel rods on the outside of the side walls and tightened to clamp the two side walls to the two sides of the precast concrete base plate 3; the connecting steel rods 5 lie in the grooves at the bottom of the two precast concrete base plates 3;

[0065] Two precast concrete base plates 3 are arranged in parallel between the two side walls and are respectively close to the lower parts of the two side walls, so that a longitudinal groove is formed between the two precast concrete base plates. Multiple connecting steel rods 3 7 are arranged in parallel in the groove at both ends, which are respectively connected and fixed to the precast concrete base plates on both sides for limiting. The precast concrete base plates 3 can be clamped by adjusting the fixing nuts 10. The precast flange connecting plates at the ends of the connecting steel rods 3 7 and the connecting holes thereon are connected to the wall surface by bolts; the connecting steel rods 3 7 are arranged in two layers corresponding to the upper and lower parts; the connecting steel rods 2 6 are placed in the two grooves arranged in the transverse direction on the upper surfaces of the two precast concrete base plates, and the two ends of the connecting steel rods 2 6 are connected and fixed to the precast concrete side wall 1 and the precast concrete side wall 2, and the connection and fixing method is the same as that of the connecting steel rods 3 7;

[0066] The assembled water ditch body 8 is embedded in the ditch between the upper and lower connecting steel rods 3 7, and is suspended on the connecting steel rod 2 6 or the upper connecting steel rod 3 7 and is tilted according to a preset drainage slope. The ditch cover 13 is embedded in the ditch and supported and fixed on the connecting steel rod 2 6 and the upper connecting steel rod 3 7.

[0067] See also Figure 3As shown, a prefabricated and assembled inspection tunnel bed in a vehicle depot of the present invention is a prefabricated half-wall and half-column inspection tunnel bed, which includes two parallel and oppositely arranged precast concrete side wall 1 and precast concrete side wall 2. Two precast concrete columns 4 are provided on the top of one of the two side walls and are at the same height as the opposite side wall. The lower part of the column is integrally connected to a flange 9, and the flange is fixedly connected to the top of the wall by anchor bolts 11; embedded fastener installation sleeves are provided on the top of the precast concrete column and the opposite side wall, and fasteners and rails are installed; wherein the embedded fastener installation sleeves and the installation of the fasteners and rails are implemented according to the existing half-wall and half-column inspection tunnel bed or conventional installation method, which will not be repeated here;

[0068] See also Figure 4 、 5 As shown, at least two through holes 14 are reserved in the lower part of the two side walls, and the two ends of two parallel and transverse connecting steel rods 5 are respectively passed through the holes on the two side walls. The fixing nuts 10 are sleeved on the ends of the connecting steel rods on the outside of the side walls and tightened to clamp the two side walls to the two sides of the precast concrete base plate 3; the connecting steel rods 5 lie in the grooves at the bottom of the two precast concrete base plates 3;

[0069] Two precast concrete base plates 3 are arranged in parallel between the two side walls and are respectively close to the lower parts of the two side walls, so that a longitudinal groove is formed between the two precast concrete base plates. Multiple connecting steel rods 3 7 are arranged in parallel in the groove at both ends, which are respectively connected and fixed to the precast concrete base plates on both sides for limiting. The precast concrete base plates 3 can be clamped by adjusting the fixing nuts 10. The precast flange connecting plates at the ends of the connecting steel rods 3 7 and the connecting holes thereon are connected to the wall surface by bolts; the connecting steel rods 3 7 are arranged in two layers corresponding to the upper and lower parts; the connecting steel rods 2 6 are placed in the two grooves arranged in the transverse direction on the upper surfaces of the two precast concrete base plates, and the two ends of the connecting steel rods 2 6 are connected and fixed to the precast concrete side wall 1 and the precast concrete side wall 2, and the connection and fixing method is the same as that of the connecting steel rods 3 7;

[0070] The assembled water ditch body 8 is embedded in the ditch between the upper and lower connecting steel rods 3 7, and is suspended on the connecting steel rod 2 6 or the upper connecting steel rod 3 7 and is tilted according to a preset drainage slope. The ditch cover 13 is embedded in the ditch and supported and fixed on the connecting steel rod 2 6 and the upper connecting steel rod 3 7.

[0071] The present invention provides a method for constructing a prefabricated and assembled vehicle depot inspection pit bed, which is characterized by comprising the following steps:

[0072] (1) Prefabricated parts are first produced in the factory: precast concrete bottom plate, precast concrete side wall, precast concrete column, connecting steel rods 1, 2, 3, water ditch body, and water ditch cover;

[0073] (2) Check the pit assembly, positioning and fixing,

[0074] 1) Connect the precast concrete side wall 1 and the precast concrete side wall 2 with two connecting steel rods 5;

[0075] 2) Connect the precast concrete base plate 3 with 6 connecting steel rods 3 7;

[0076] 3) Installing the structure assembled in step 2) within the structure formed by precast concrete side wall 1 and precast concrete side wall 2 in step 1), and then using two connecting steel rods 2 6 to reinforce and securely connect the structure assembled in step 2 to the structure assembled in step 1;

[0077] 4) Hoist the water ditch body on the connecting steel rod 2 6 or the connecting steel rod 3 7 according to the designed slope;

[0078] 5) Embed fasteners and installation sleeves on the precast concrete side wall 1, precast concrete side wall 2, or precast concrete columns, and install fasteners and rails on the precast concrete side wall 1, precast concrete side wall 2, or precast concrete columns; the precast concrete side wall 1, precast concrete side wall 2, or precast concrete columns 4 are combined into a column-type inspection pit, a wall-type inspection pit, or a half-wall and half-column inspection pit;

[0079] 6) Position the structures assembled in steps 1), 2), and 3) according to the line type and track geometry requirements. Once the standards are met, use self-compacting concrete or other filling materials to grout the bottom of the precast base plate and the outside of the side walls to complete the construction.

[0080] The functions of the connecting steel rod 1 5, the connecting steel rod 2 6, and the connecting steel rod 3 7 of the present invention are to limit and fix the structure. The connecting steel rod 1 5 and the connecting steel rod 2 6 limit the precast concrete side wall 1, the precast concrete side wall 2 2, and the precast concrete bottom plate. The connecting steel rod 3 7 limits the precast concrete bottom plate. The two ends of the connecting steel rod 2 6 and the connecting steel rod 3 7 are connected with prefabricated flange connecting plates or prefabricated screws. The flange connecting plates are connected to the wall screws, and the screws are connected to the threaded sleeves embedded in the wall. The connection methods are not limited to these, and other conventional connection methods can be adopted as needed, such as expansion bolt connection, anchor connection method, etc., and are completed through prefabrication and realized through simple assembly.

[0081] Example

[0082] The construction method of the present invention;

[0083] (1) Factory prefabrication: prefabricated base plate, prefabricated concrete side wall 1, prefabricated concrete side wall 2, prefabricated column, connecting steel rods 1, 2, 3, and water ditch;

[0084] (2) Assembly, positioning and fixing of wall inspection pit: see Figure 1 、 4 ,5,

[0085] 1) Precast concrete side wall 1 and precast concrete side wall 2 are connected by two connecting steel rods 1 (5);

[0086] 2) The prefabricated base plate is connected by 6 connecting steel rods (7);

[0087] 3) Installing the structure formed in 2) within the structure formed in 1), and using two connecting steel rods (6) to reinforce and fix the structure formed in 2) to the structure formed in 1);

[0088] 4) Hoist the water ditch body onto the second connecting steel rod (6) or the third connecting steel rod (7) according to the designed slope;

[0089] 5) Install rail supports on precast concrete side wall 1 and precast concrete side wall 2, and install fasteners and rails on the rail supports;

[0090] 6) Position the structure formed in 1), 2) and 3) according to the line type and track geometry requirements. Once the standards are met, use self-compacting concrete or other filling materials to grout the bottom of the precast base plate and the outside of the side walls to complete the construction.

[0091] (3) Assembly, positioning and fixing of column inspection pit: see Figure 2 、 4 ,5,

[0092] 1) Precast concrete side wall 1 and precast concrete side wall 2 are connected by two connecting steel rods 1 (5);

[0093] 2) The prefabricated base plate is connected by 6 connecting steel rods (7);

[0094] 3) Installing the structure formed in 2) within the structure formed in 1), and using two connecting steel rods (6) to reinforce and fix the structure formed in 2) to the structure formed in 1);

[0095] 4) Hoist the water ditch body onto the second connecting steel rod (6) or the third connecting steel rod (7) according to the designed slope;

[0096] 5) Install four precast columns on the top of precast concrete side wall 1 and precast concrete side wall 2 using spiral spikes;

[0097] 6) Install fasteners and rails on the top of the prefabricated column;

[0098] 7) Position the structure formed by 1), 2), 3), 4) and 5) according to the line type and track geometry requirements. Once the standards are met, use self-compacting concrete or other filling materials to grout the bottom of the precast base plate and the outside of the side walls to complete the construction.

[0099] (4) Assembly, positioning and fixing of half-wall and half-column inspection pit: see Figure 3 、 4 ,5,

[0100] 1) A precast concrete side wall 1 and a precast concrete side wall 2 are connected by two connecting steel rods 1 (5);

[0101] 2) The prefabricated base plate is connected by 6 connecting steel rods (7);

[0102] 3) Installing the structure formed in 2) within the structure formed in 1), and using two connecting steel rods (6) to reinforce and fix the structure formed in 2) to the structure formed in 1);

[0103] 4) Hoist the water ditch body onto the second connecting steel rod (6) or the third connecting steel rod (7) according to the designed slope;

[0104] 5) Install two prefabricated columns on top of the prefabricated concrete side wall 2 using spiral spikes;

[0105] 6) Install fasteners and rails on the top of the precast column and the top rail support platform of the precast concrete side wall;

[0106] 7) Position the structure formed by 1), 2), 3), 4), 5) and 6) according to the line type and track geometry requirements. Once the standards are met, use self-compacting concrete or other filling materials to grout the bottom of the precast base plate and the outside of the side walls to complete the construction.

Claims

1. A prefabricated and assembled vehicle depot inspection pit bed, characterized in that: The invention comprises two side walls, namely, a precast concrete side wall 1 (1) and a precast concrete side wall 2 (2), which are arranged in parallel and opposite to each other. Rail support platforms (12) are correspondingly arranged on the tops of the two side walls, and fastener installation sleeves are embedded in the range of the rail support platforms (12); steel rails (100) are set on the rail support platforms and fasteners are installed to connect and fix them; At least two through holes (14) are correspondingly reserved at the lower part of the two side walls, and two parallel and transverse connecting steel rods (5) are respectively passed through the holes on the two side walls at both ends, and a fixing nut (10) is sleeved on the end of the connecting steel rod on the outside of the side wall and tightened to clamp the two side walls on both sides of the precast concrete base plate (3); the connecting steel rod (5) lies in the groove at the bottom of the two precast concrete base plates (3); Two precast concrete bottom plates (3) are arranged in parallel between the two side walls and are respectively close to the lower parts of the two side walls, so that a longitudinal groove is formed between the two precast concrete bottom plates. A plurality of connecting steel rods (3) are arranged in parallel in the groove, and the two ends of the connecting steel rods (7) are respectively connected and fixed to the precast concrete bottom plates on both sides. The ends of the connecting steel rods (3) are precast flange connecting plates, and bolts are used to connect the connecting steel rods (3) to the wall through the connecting holes on the flange connecting plates. The connecting steel rods (3) are arranged in two layers corresponding to the upper and lower parts. The connecting steel rods (2) are placed in the two grooves arranged in the upper surfaces of the two precast concrete bottom plates, and the two ends of the connecting steel rods (2) are connected and fixed to the precast concrete side wall (1) and the precast concrete side wall (2). The assembled water ditch body (8) is embedded in the ditch between the upper and lower connecting steel rods (7), and is hung on the connecting steel rod (6) or the upper connecting steel rod (7) and is tilted according to a preset drainage slope. The ditch cover (13) is embedded in the ditch and supported and fixed on the connecting steel rod (6) and the upper connecting steel rod (7).

2. A prefabricated and assembled vehicle depot inspection pit bed, characterized in that: The invention comprises two side walls, namely, a precast concrete side wall 1 (1) and a precast concrete side wall 2 (2), which are arranged in parallel and opposite to each other. Two precast concrete columns (4) are arranged on the top of each side wall, and the tops of the two side walls are arranged correspondingly. A flange (9) is integrally connected to the lower part of the column, and the flange is fixedly connected to the tops of the two side walls by anchor bolts (11). The tops of the precast concrete columns (4) correspond to the embedded fasteners and the fasteners and rails are installed. At least two through holes (14) are correspondingly reserved at the lower part of the two side walls, and two parallel and transverse connecting steel rods (5) are respectively passed through the holes on the two side walls at both ends, and a fixing nut (10) is sleeved on the end of the connecting steel rod on the outside of the side wall and tightened to clamp the two side walls on both sides of the precast concrete base plate (3); the connecting steel rod (5) lies in the groove at the bottom of the two precast concrete base plates (3); Two precast concrete bottom plates (3) are arranged in parallel between the two side walls and are respectively close to the lower parts of the two side walls, so that a longitudinal groove is formed between the two precast concrete bottom plates. A plurality of connecting steel rods (3) are arranged in parallel in the groove, and the two ends of the connecting steel rods (7) are respectively connected and fixed to the precast concrete bottom plates on both sides. The ends of the connecting steel rods (3) are precast flange connecting plates, and bolts are used to connect the connecting steel rods (3) to the wall through the connecting holes on the flange connecting plates. The connecting steel rods (3) are arranged in two layers corresponding to the upper and lower parts. The connecting steel rods (2) are placed in the two grooves arranged in the upper surfaces of the two precast concrete bottom plates, and the two ends of the connecting steel rods (2) are connected and fixed to the precast concrete side wall (1) and the precast concrete side wall (2). The assembled water ditch body (8) is embedded in the ditch between the upper and lower connecting steel rods (7), and is hung on the connecting steel rod (6) or the upper connecting steel rod (7) and is tilted according to a preset drainage slope. The ditch cover (13) is embedded in the ditch and supported and fixed on the connecting steel rod (6) and the upper connecting steel rod (7).

3. A prefabricated and assembled vehicle depot inspection pit bed, characterized in that: The invention comprises two side walls, namely, a precast concrete side wall 1 (1) and a precast concrete side wall 2 (2), which are arranged in parallel and opposite to each other. Two precast concrete columns (4) are arranged on the top of one of the two side walls and are at the same height as the opposite side wall. The lower part of the column is integrally connected with a flange (9), and the flange is fixedly connected to the top of the wall by anchor bolts (11); embedded fastener installation sleeves are arranged on the top of the precast concrete column and the opposite side wall, and fasteners and rails are installed. At least two through holes (14) are correspondingly reserved at the lower part of the two side walls, and two parallel and transverse connecting steel rods (5) are respectively passed through the holes on the two side walls at both ends, and a fixing nut (10) is sleeved on the end of the connecting steel rod on the outside of the side wall and tightened to clamp the two side walls on both sides of the precast concrete base plate (3); the connecting steel rod (5) lies in the groove at the bottom of the two precast concrete base plates (3); Two precast concrete bottom plates (3) are arranged in parallel between the two side walls and are respectively close to the lower parts of the two side walls, so that a longitudinal groove is formed between the two precast concrete bottom plates. A plurality of connecting steel rods (3) are arranged in parallel in the groove, and the two ends of the connecting steel rods (7) are respectively connected and fixed to the precast concrete bottom plates on both sides. The ends of the connecting steel rods (3) are precast flange connecting plates, and bolts are used to connect the connecting steel rods (3) to the wall through the connecting holes on the flange connecting plates. The connecting steel rods (3) are arranged in two layers corresponding to the upper and lower parts. The connecting steel rods (2) are placed in the two grooves arranged in the upper surfaces of the two precast concrete bottom plates, and the two ends of the connecting steel rods (2) are connected and fixed to the precast concrete side wall (1) and the precast concrete side wall (2). The assembled water ditch body (8) is embedded in the ditch between the upper and lower connecting steel rods (7), and is hung on the connecting steel rod (6) or the upper connecting steel rod (7) and is tilted according to a preset drainage slope. The ditch cover (13) is embedded in the ditch and supported and fixed on the connecting steel rod (6) and the upper connecting steel rod (7).

4. A method for constructing a prefabricated and assembled vehicle depot inspection tunnel bed, wherein the prefabricated and assembled vehicle depot inspection tunnel bed is the prefabricated and assembled vehicle depot inspection tunnel bed according to claim 1, 2 or 3, characterized in that: The method comprises the following steps: (1) prefabricating in a factory: prefabricated concrete bottom plate, prefabricated concrete side wall, prefabricated concrete column, connecting steel rods 1, 2, 3, water ditch body and / or water ditch cover plate; (2) Check pit assembly, positioning and fixing; 1) connecting the precast concrete side wall 1 (1) and the precast concrete side wall 2 (2) with two connecting steel rods 1 (5); 2) connecting the precast concrete base plate (3) with six connecting steel rods (7); 3) Installing the structure assembled in step 2) within the structure formed by the precast concrete side wall 1 (1) and the precast concrete side wall 2 (2) in step 1), and then using two connecting steel rods 2 (6) to reinforce and fix the structure assembled in step 2) and the structure assembled in step 1); 4) Hoist the water ditch body onto the second connecting steel rod (6) or the third connecting steel rod (7) according to the designed slope; 5) Pre-embed fasteners and installation sleeves on the precast concrete side wall one (1), precast concrete side wall two (2) or precast concrete columns, and install fasteners and rails on the precast concrete side wall one (1), precast concrete side wall two (2) or precast concrete columns; the precast concrete side wall one (1), precast concrete side wall two (2) or precast concrete columns (4) are combined into a column type inspection pit, a wall type inspection pit or a half wall and half column type inspection pit; 6) Position the structures assembled in steps 1), 2), and 3) according to the line type and track geometry requirements. Once the standards are met, use self-compacting concrete or other filling materials to grout the bottom of the precast base plate and the outside of the side walls to complete the construction.

Images