Drainage construction system and construction method for urban open-cut tunnel

Abstract

The present invention provides a drainage construction system and a construction method for an open-cut tunnel in an urban area, and relates to the technical field of underground engineering. The side ditch of the present application adopts an adjustable side ditch steel cage standardized in-situ binding frame, and the standardized top easy-to-remove side formwork system is used for in-situ binding and rapid demolding construction. It can be quickly adjusted and bound according to the frame, and the construction speed is fast and the accuracy is high. The water collection tank template is constructed by adopting a standardized template for a frame structure water collection tank with an L-shaped slide rail and a steel pipe diagonal brace. The template installation integrity is good during the entire template construction process, the structure is stable and reliable, and the assembly and disassembly is simple. The standardized temporary clamp is installed through pipeline construction, and a closed pressurized operating platform for a pressure release well is set up. The pipeline connection effect is good, it is convenient for personnel to operate, and the construction is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of underground engineering, and in particular to a drainage construction system and a construction method for an urban open-cut underpass tunnel. Background Art

[0002] With the rapid development of the national economy, the number of cars owned by the people continues to increase, and the burden of urban road traffic is becoming heavier. Nowadays, large and medium-sized cities in China are committed to improving the traffic functions of urban roads, so they have higher and higher requirements for road design. Roads have developed from simple plane traffic to three-dimensional traffic, which is generally achieved by building overpasses or underpasses. At the same time, due to the increasing requirements for urban landscape, underpasses have highlighted their advantages in this regard, so they have also been promoted and applied more and more. The normal operation of underpasses is directly related to the smooth flow of urban road systems, and the rainwater system of underpasses is the key to the normal operation of tunnels.

[0003] In view of this, in view of the shortcomings of the previous urban open-cut tunnel drainage system, such as slow side ditch construction speed, inconvenient installation of water collection pool templates, loose pipe docking, and inconvenient construction of pressure release wells, a new construction method for urban open-cut tunnel drainage system is urgently needed to improve construction efficiency, improve construction quality, and ensure safe and reliable construction quality. Summary of the invention

[0004] The purpose of the present invention is to provide an urban open-cut tunnel drainage construction system and a construction method, aiming to solve the technical problems of slow side ditch construction speed, inconvenient installation of water collection pool templates, loose pipe connection and inconvenient construction of pressure release wells in urban open-cut tunnel drainage systems.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The drainage construction system for urban open-cut tunnels includes a standardized in-situ binding frame for adjustable side ditch steel cages, a standardized top-to-top easy-to-remove side formwork system, a standardized template system for frame structure water collection tanks, standardized temporary fixtures for pipeline installation, and a closed pressurized operating platform for pressure release wells;

[0007] The adjustable side ditch steel cage stereotyped in-situ binding tire frame includes a tire frame pad, a frame-type steel bar support plate, a concave pad and a steel bar fixing ring; the tire frame pad is fixed to the side ditch steel cage binding position by soil nails; the frame-type steel bar support plate is provided with a plurality of steel bar holes, which are positioned on both sides of the tire frame pad; the concave pad is positioned on the tire frame pad along the tunnel direction; the steel bar fixing ring is embedded in the concave pad to realize the positioning of the steel bar;

[0008] The standardized top-to-top easy-to-remove side mold system includes a screw sleeve connector, a screw and a circular sleeve; the screw sleeve connector is provided with an internal thread matching the screw; the two ends of the screw sleeve connector are respectively threadedly connected to the screw; the circular sleeve is positioned on the screw and fixedly connected to the sleeve bracket to realize the positioning setting of the screw;

[0009] The frame structure water collection tank standardized template system includes an L-shaped slide rail, a steel pipe back rib, a steel pipe diagonal brace and a scaffold; the L-shaped slide rail is installed on the cushion layer and positioned on both sides of the tied steel bars; the steel template is installed and fixed on the L-shaped slide rail and positioned and connected through the steel pipe back rib; one end of the steel pipe diagonal brace is in contact with the steel template, and the other end is clamped on the scaffold through a clamp;

[0010] The pipeline installation standardization temporary fixture includes a standardization fixture, a tensioning ear plate and a tensioning bolt; a joint is provided in the middle of the standardization fixture for welding the interfaces of the two pipelines; the standardization fixture is a C-shaped structure; the tensioning ear plates are respectively arranged at the two ends of the notch of the standardization fixture, and the tensioning bolts are used to tighten and loosen the standardization fixture;

[0011] The pressure release well closed pressurization operation platform includes a platform support frame, a platform bottom plate, a platform side plate and an L-shaped side plate connector; the platform support frame is installed on the ground to support the entire platform; the platform bottom plate is installed on the platform support frame and fixed; the platform side plates are connected to the platform bottom plate to form a platform as a whole, and the platform side plates are fixedly connected by L-shaped side plate connectors through iron nails.

[0012] As a further improvement of the present invention, the adjustable side ditch steel cage standardized in-situ binding frame is also provided with a support plate lateral fixing plate; the support plate lateral fixing plate is positioned on both side edges of the frame-type steel support plate.

[0013] As a further improvement of the present invention, the lateral fixing plate of the support plate is fixed to the tire frame pad by iron nails, and the vertical positioning of the frame-type steel bar support plate is realized from both side edges of the frame-type steel bar support plate and is set on the tire frame pad; the concave pad is fixed to the tire frame pad by iron nails at equal intervals.

[0014] As a further improvement of the present invention, the steel formwork is installed with steel pipe back ribs near the upper and lower ends to connect it as a whole; one end of the steel pipe diagonal brace is supported on the steel formwork, and a clamp is welded on the other end; the clamp is fixedly clamped on the steel pipe.

[0015] As a further improvement of the present invention, it also includes a welding end plate, and the welding end plate is used to be fixedly welded to the bottom end of the steel pipe diagonal support.

[0016] As a further improvement of the present invention, a bolt hole is provided in the middle of the pulling ear plate, which is arranged at the top of the shaping fixture, and the pulling bolt fastens the pulling ear plate through the bolt hole.

[0017] As a further improvement of the present invention, it also includes a pipeline and a pressure release well; the pressure release well is placed in the operating platform, and the pipeline is connected to the pressure release well through an opening on the platform side plate.

[0018] As a further improvement of the present invention, a retractable ladder and a climbing ladder are also provided; the retractable ladder is installed on the outer side of the platform side plate; the climbing ladder is vertically installed on the inner side of the platform.

[0019] The urban open-cut underpass tunnel drainage system and construction method include the following steps:

[0020] S1. Construction layout: Before excavating the foundation pit, the original ground elevation, excavation width, and precise layout should be performed;

[0021] S2. Excavation of foundation pit: The foundation pit is excavated by open excavation method, with segmented excavation, layered slope, support while excavating, and strict over-excavation or disturbance of the base soil, and excavation to the designed elevation;

[0022] S3. Construction of cushion layer and waterproof layer: After the excavation of the foundation pit is completed and the precipitation effect is ensured, the axis and elevation are corrected and checked, and pumped concrete is used for pouring. Before pouring the cushion layer, the foundation pit needs to be manually leveled, and the width is measured and laid out to ensure that it does not affect the structural construction. The waterproof layer is constructed with polymer self-adhesive waterproof membrane;

[0023] S4. Construction of water collection tank: Tie and fix the steel bars and embedded parts of the water collection tank according to the construction requirements, and then carry out the construction of the frame structure water collection tank template. The L-shaped slide rail is installed on the cushion layer and arranged on both sides of the tied steel bars. The steel template is installed and fixed on the L-shaped slide rail, and steel pipe back ribs are installed near the upper and lower ends to connect them as a whole. At the same time, steel pipe diagonal braces are used for support. One end of the steel pipe diagonal brace is supported on the steel template, and the other end is welded with a clamp, which is fixed and clamped on the steel pipe. The welded end plate on the clamp is used to fix and weld to the bottom end of the steel pipe diagonal brace. The scaffolding is installed from the ground according to construction needs;

[0024] S5. Side ditch reinforcement binding and formwork: The tire frame pad is fixed to the side ditch reinforcement cage binding position by soil nails. A plurality of reinforcement holes are opened on the frame reinforcement support plate, and lateral fixing plates of the support plate are installed on both sides and fixed to the tire frame pad by iron nails. The concave pad is fixed to the tire frame pad by iron nails at equal intervals along the tunnel direction. The reinforcement fixing ring is embedded in the concave pad to position and fix the reinforcement. The reinforcement is bound and the formwork is supported. The sleeve bracket is fixed to the reinforcement at equal intervals between the templates in the vertical tunnel direction. The standardized top-to-top easy-to-remove side formwork system adopts a screw sleeve connector with threads inside, which is convenient for the screw to rotate in. The screw is rotated in from both ends of the screw sleeve connector through the handles, and the other end is pressed against the template to remove the formwork. The circular sleeve is fixed to the sleeve bracket by welding to achieve the fixed positioning of the screw.

[0025] S6. Drainage box culvert construction: For transverse box culverts, during construction, the ditch is excavated according to the rectangular cross-section rule, the base is compacted to meet the density requirements, and the base is kept dry. During construction, the side ditch is smooth and straight, and smoothly connected with the pump house water inlet;

[0026] S7. Pipeline installation: Prefabricate a temporary fixture for pipeline installation in advance. A joint is provided in the middle of the fixture to facilitate pipeline welding. A bolt hole is provided in the middle of the pull ear plate, which is arranged at the top of the fixture. The pull bolts are used to fasten the pull ear plate through the bolt holes. The pipeline is hoisted to the designated position by a crane. The pipeline is installed horizontally and vertically. The fixture is placed on the interface of the two pipelines to connect and weld the pipelines.

[0027] S8. Erection and construction of pressure release well platform: The platform support frame is installed on the ground to support the entire platform. The platform bottom plate is installed on the platform support frame and fixed. The platform side plates are connected to the platform bottom plate to form a whole platform. The platform side plates are fixedly connected by L-shaped side plate connectors through iron nails. The retractable ladder is installed on the outside of the platform side plates. The pressure release well is placed in the operating platform, and the pipeline is connected to the pressure release well through the opening on the platform side plate.

[0028] S9. Construction of inspection wells and valve wells, and power-on test operation.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The side ditch of the present application adopts an adjustable side ditch steel cage and a standardized in-situ binding frame, and the standardized top easy-to-remove side formwork system is used for in-situ binding and rapid demolding construction. It can be quickly adjusted and bound according to the frame, and the construction speed is fast and the accuracy is high; the water collection tank template is constructed by adopting a standardized template for a frame structure water collection tank with an L-shaped slide rail and steel pipe diagonal braces. The template installation has good integrity during the entire template construction process, the structure is stable and reliable, and the assembly and disassembly is simple; the standardized temporary clamp is installed through pipeline construction, and a closed pressurized operating platform for the pressure release well is set up, the pipeline connection effect is good, it is easy for personnel to operate, and the construction is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. It is obvious that the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is a schematic diagram of the structure of this application

[0033] Figure 2 It is an adjustable side ditch steel cage with standardized in-situ tyre frame structure. Front view

[0034] Figure 3 It is an adjustable side ditch steel cage with standardized in-situ tyre frame structure side view

[0035] Figure 4 This is the front view of the top-mounted easily removable formwork system structure.

[0036] Figure 5 It is a side view of the top-mounted easily removable formwork system structure

[0037] Figure 6 This is a schematic diagram of the standardized template architecture of the frame structure water collection tank

[0038] Figure 7 Schematic diagram of the clamp structure

[0039] Figure 8 This is the front view of the temporary fixture structure for pipeline installation

[0040] Fig. 9 This is the side view of the structure of the temporary fixture for pipeline installation

[0041] Fig.10 This is a cross-sectional view of the structure of the closed pressurization operation platform of the pressure release well

[0042] Fig.11 A top view of the closed pressurization operation platform structure of the pressure release well

[0043] Description of the numbers in the figure:

[0044] 1. Adjustable side ditch steel cage standardized in-situ binding frame; 11. Frame pad; 12. Frame steel support plate; 121. Steel bar hole; 13. Concave pad; 14. Steel bar fixing ring; 15. Soil nail; 16. Support plate lateral fixing plate; 2. Standardized top easy-to-remove side formwork system; 21. Screw casing connector; 22. Screw; 23. Round casing; 24. Handle; 25. Casing bracket; 3. Standardized formwork system for frame structure water collection tank; 31. L-shaped slide rail; 32. Steel pipe back rib; 33. Steel pipe diagonal brace ; 331. Welded end plate; 34. Scaffolding; 35. Steel formwork; 36. Clamp; 37. Tie steel bars; 4. Standardized temporary fixture for pipeline installation; 41. Standardized fixture; 411. Joint; 42. Pull ear plate; 43. Pull bolt; 5. Closed pressurized operation platform for pressure release well; 51. Platform support frame; 52. Platform bottom plate; 53. Platform side plate; 54. L-shaped side plate connector; 6. Nails; 7. Pad; 8. Pipeline; 9. Pressure release well; 10. Retractable ladder; 20. Ladder. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Combined with Figures 1 to 11 The present invention provides an urban open-cut underpass tunnel drainage construction system and a construction method, aiming to solve the technical problems of slow side ditch construction speed, inconvenient installation of water collection pool templates, loose pipe connection and inconvenient construction of pressure release wells in the urban open-cut underpass tunnel drainage system.

[0047] Specifically, the urban open-cut tunnel drainage construction system includes an adjustable side ditch steel cage standardized in-situ binding frame 1, a standardized top-to-top easy-to-remove side formwork system 2, a frame structure water collection tank standardized template system 3, a pipeline installation standardized temporary fixture 4 and a pressure release well closed pressurization operation platform 5;

[0048] The adjustable side ditch steel cage stereotyped in-situ binding tire frame 1 includes a tire frame pad 11, a frame-type steel support plate 12, a concave pad 13 and a steel fixing ring 14; the tire frame pad 11 is fixed to the side ditch steel cage binding position by soil nails 15; the frame-type steel support plate 12 is provided with a plurality of steel bar holes 121, and is positioned on both sides of the tire frame pad 11; the concave pad 13 is positioned on the tire frame pad 11 along the tunnel direction; the steel fixing ring 14 is embedded in the concave pad 13 to realize the positioning of the steel bar;

[0049] The standardized top-to-top easily removable side mold system 2 includes a screw sleeve connector 21, a screw 22 and a circular sleeve 23; the screw sleeve connector 21 is provided with an internal thread matching the screw 22; the two ends of the screw sleeve connector 21 are respectively threadedly connected to the screw 22; the circular sleeve 23 is positioned on the screw 22 and fixedly connected to the sleeve bracket 25, so as to realize the positioning setting of the screw 22;

[0050] The frame structure water collection tank standardized template system 3 includes an L-shaped slide rail 31, a steel pipe back rib 32, a steel pipe diagonal brace 33 and a scaffold 34; the L-shaped slide rail 31 is installed on the cushion layer 7 and is positioned on both sides of the binding steel bars 37; the steel template 35 is installed and fixed on the L-shaped slide rail 31 and is positioned and connected through the steel pipe back rib 32; one end of the steel pipe diagonal brace 33 is in contact with the steel template 35, and the other end is clamped on the scaffold 34 through a clamp 36;

[0051] The pipeline installation finalized temporary fixture 4 comprises a finalized fixture 41, a pull ear plate 42 and a pull bolt 43; a joint opening 411 is provided in the middle of the finalized fixture 41 for welding the interface of the two pipelines 8; the finalized fixture 41 is a C-shaped structure; the pull ear plates 42 are respectively arranged at the two ends of the notch of the finalized fixture 41, and the tightening and loosening of the finalized fixture 41 is realized by the pull bolt 43;

[0052] The pressure release well closed pressurization operation platform 5 includes a platform support frame 51, a platform bottom plate 52, a platform side plate 53 and an L-shaped side plate connector 54; the platform support frame 51 is installed on the ground to support the entire platform; the platform bottom plate 52 is installed on the platform support frame 51 and fixed; the platform side plate 53 is connected to the platform bottom plate 52 to form a platform as a whole, and the platform side plates 53 are fixedly connected by L-shaped side plate connectors 54 through iron nails 6.

[0053] Furthermore, after the reinforcement is tied, the standardized top-to-top easy-to-remove side formwork system 2 is fixed to the reinforcement at equal intervals between the formworks in the vertical tunnel direction through the sleeve brackets 25, and the formwork is quickly removed by rotating the handle 24.

[0054] Furthermore, it also includes a welding end plate 331, and the welding end plate 331 is used to be fixedly welded to the bottom end of the steel pipe diagonal support 33.

[0055] Furthermore, it also includes a pipeline 8 and a pressure release well 9; the pressure release well 9 is placed in the operating platform, and the pipeline 8 is connected to the pressure release well 9 through an opening on the platform side plate 53.

[0056] Furthermore, a support plate lateral fixing plate 16 is provided; the support plate lateral fixing plate 16 is positioned on both side edges of the frame-type steel bar support plate 12; it should be noted that the support plate lateral fixing plate 16 is fixed to the tire frame pad 11 by iron nails 6, and the frame-type steel bar support plate 12 is vertically positioned on the tire frame pad 11 from both side edges of the frame-type steel bar support plate 12; the concave pad 13 is fixed to the tire frame pad 11 by iron nails 6 at equal intervals.

[0057] Preferably, the screw 22 is rotated into the screw sleeve connector 21 from both ends through handles 24, and the circular sleeve 23 is fixed to the sleeve bracket 25 by welding to achieve fixed positioning of the screw 22.

[0058] Furthermore, the steel formwork 35 is installed with steel pipe back ribs 32 near both ends to connect it as a whole, and is supported by steel pipe diagonal braces 33. One end of the steel pipe diagonal brace 33 is supported on the steel formwork 35, and the other end is welded with a clamp 36. The clamp 36 is fixedly clamped on the steel pipe. The scaffolding 34 shown is installed from the ground according to construction needs.

[0059] Furthermore, a bolt hole is provided in the middle of the pulling ear plate 42 and is disposed at the top of the shaping fixture 41 . The pulling bolt 43 fastens the pulling ear plate 42 through the bolt hole so that the pipe 8 can be firmly docked.

[0060] Furthermore, a retractable ladder 10 and a climbing ladder 20 are provided; the retractable ladder 10 is installed on the outer side of the platform side panel 53 and can be retracted to the ground for easy access for personnel, and the climbing ladder 20 is vertically installed on the inner side of the platform for easy access for personnel.

[0061] The urban open-cut underpass tunnel drainage system and construction method include the following steps:

[0062] S1. Construction layout: Before excavating the foundation pit, the original ground elevation, excavation width, and precise layout should be performed;

[0063] S2. Excavation of foundation pit: The foundation pit is excavated by open excavation method, with segmented excavation, layered slope, support while excavating, and strict over-excavation or disturbance of the base soil, and excavation to the designed elevation;

[0064] S3, cushion layer 7, waterproof layer construction: after the excavation of the foundation pit is completed, after ensuring the precipitation effect, the axis and elevation are corrected and checked, and pumped concrete is used for pouring. Before pouring the cushion layer 7, the foundation pit needs to be manually leveled, and the width is measured and laid out to ensure that it does not affect the structural construction. The waterproof layer is constructed with a polymer self-adhesive waterproof membrane;

[0065] S4, water collection tank construction: according to the construction requirements, the steel bars and embedded parts of the water collection tank are tied and fixed, and then the frame structure water collection tank template is constructed. The L-shaped slide rail 31 is installed on the cushion layer 7 and arranged on both sides of the tied steel bars 37. The steel template 35 is installed and fixed on the L-shaped slide rail 31, and the steel pipe back ribs 32 are installed near the upper and lower ends to connect them as a whole. At the same time, steel pipe diagonal braces 33 are used for support. One end of the steel pipe diagonal brace 33 is supported on the steel template 35, and the other end is welded with a clamp 36. The clamp 36 is fixedly clamped on the steel pipe. The welded end plate 331 on the clamp 36 is used to be fixedly welded to the bottom end of the steel pipe diagonal brace 33. The scaffolding 34 is installed from the ground according to the construction needs;

[0066] S5, side ditch reinforcement binding and formwork: the tire frame pad 11 is fixed to the side ditch reinforcement cage binding position by soil nails 15, a plurality of reinforcement holes 121 are opened on the frame-type reinforcement support plate 12, and support plate lateral fixing plates 16 are installed on both sides and fixed to the tire frame pad 11 by iron nails 6, the concave pad 13 is fixed to the tire frame pad 11 by iron nails 6 at equal intervals on the tire frame pad 11 along the tunnel direction, and the reinforcement fixing ring 14 is embedded in the concave pad 13 for positioning and fixing the reinforcement, and the reinforcement binding and formwork are carried out. The sleeve bracket 25 is fixed to the reinforcement at equal intervals between the templates in the vertical tunnel direction. The standardized top-to-top easy-to-remove side formwork system 2 adopts a screw sleeve connector 21 with threads inside, which is convenient for the screw 22 to rotate in. The screw 22 is rotated in from the two ends of the screw sleeve connector 21 through the handle 24, and the other end is pressed against the template to remove the mold. The circular sleeve 23 is fixed to the sleeve bracket 25 by welding to achieve the fixed positioning of the screw 22;

[0067] S6. Drainage box culvert construction: For transverse box culverts, during construction, the ditch is excavated according to the rectangular cross-section rule, the base is compacted to meet the density requirements, and the base is kept dry. During construction, the side ditch is smooth and straight, and smoothly connected with the pump house water inlet;

[0068] S7, installation of pipeline 8: prefabricate the temporary fixture 4 for installing pipeline 8 in advance, the middle of the fixture 41 is provided with a joint opening 411, which is convenient for welding pipeline 8, the middle of the pull ear plate 42 is provided with a bolt hole, which is arranged at the top of the fixture 41, the pull bolt 43 fastens the pull ear plate 42 through the bolt hole, the pipeline 8 is hoisted to the designated position by a crane, the pipeline 8 is installed horizontally and vertically, and the fixture 41 is sleeved on the interface of the two pipelines 8 to connect and weld the pipeline 8;

[0069] S8, setting up and construction of pressure release well 9 platform: the platform support frame 51 is installed on the ground to support the entire platform, the platform bottom plate 52 is installed on the platform support frame 51 and fixed, the platform side plate 53 is connected to the platform bottom plate 52 to form a platform as a whole, the platform side plates 53 are fixedly connected by L-shaped side plate connectors 54 through iron nails 6, the retractable ladder 10 is installed on the outer side of the platform side plate 53 and can be retracted to the ground to facilitate personnel to enter and exit, the climbing ladder 20 is vertically installed on the inner side of the platform to facilitate personnel to go up and down, the pressure release well 9 is placed in the operating platform, and the pipeline 8 is connected to the pressure release well 9 through the opening on the platform side plate 53;

[0070] S9. Construction of inspection wells and valve wells, and power-on test operation.

[0071] The side ditch of the present application adopts an adjustable side ditch steel cage and a standardized in-situ binding frame, and the standardized top easy-to-remove side formwork system is used for in-situ binding and rapid demolding construction. It can be quickly adjusted and bound according to the frame, and the construction speed is fast and the accuracy is high; the water collection tank template is constructed by adopting a standardized template for a frame structure water collection tank with an L-shaped slide rail and steel pipe diagonal braces. The template installation has good integrity during the entire template construction process, the structure is stable and reliable, and the assembly and disassembly is simple; the standardized temporary clamp is installed through pipeline construction, and a closed pressurized operating platform for the pressure release well is set up, the pipeline connection effect is good, it is easy for personnel to operate, and the construction is convenient.

[0072] The process of this application is simple to operate, the construction efficiency and precision are improved, the high-altitude operation time is reduced, and no special equipment is required; less equipment and personnel are required, the labor intensity is low, and the site occupancy is small; the project cost is reduced; this method has achieved good results in the construction of engineering example projects, and has wide promotion and application value under similar conditions, and the economic and social benefits are very obvious.

[0073] It should be noted that some parts not described in detail in the present invention belong to the well-known technology in the art, or can be directly purchased from the market, and those skilled in the art can obtain them without creative work. The specific connection method is extremely widely used in this art or in daily life, and will not be described in detail here.

[0074] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0079] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. Construction method of urban open-cut underpass tunnel drainage system, including: The urban open-cut tunnel drainage construction system includes an adjustable side ditch steel cage standardized in-situ binding frame, a standardized top-to-top easy-to-remove side formwork system, a standardized template system for the frame structure water collection tank, a standardized temporary fixture for pipeline installation, and a closed pressurized operation platform for the pressure release well; The adjustable side ditch steel cage stereotyped in-situ binding tire frame includes a tire frame pad, a frame-type steel bar support plate, a concave pad and a steel bar fixing ring; the tire frame pad is fixed to the side ditch steel cage binding position by soil nails; the frame-type steel bar support plate is provided with a plurality of steel bar holes, which are positioned on both sides of the tire frame pad; the concave pad is positioned on the tire frame pad along the tunnel direction; the steel bar fixing ring is embedded in the concave pad to realize the positioning of the steel bar; The standardized top-to-top easy-to-remove side mold system includes a screw sleeve connector, a screw and a circular sleeve; the screw sleeve connector is provided with an internal thread matching the screw; the two ends of the screw sleeve connector are respectively threadedly connected to the screw; the circular sleeve is positioned on the screw and fixedly connected to the sleeve bracket to realize the positioning setting of the screw; The frame structure water collection tank standardized template system includes an L-shaped slide rail, a steel pipe back rib, a steel pipe diagonal brace and a scaffold; the L-shaped slide rail is installed on the cushion layer and positioned on both sides of the tied steel bars; the steel template is installed and fixed on the L-shaped slide rail and positioned and connected through the steel pipe back rib; one end of the steel pipe diagonal brace is in contact with the steel template, and the other end is clamped on the scaffold through a clamp; The pipeline installation standardization temporary fixture includes a standardization fixture, a tensioning ear plate and a tensioning bolt; a joint is provided in the middle of the standardization fixture for welding the interfaces of the two pipelines; the standardization fixture is a C-shaped structure; the tensioning ear plates are respectively arranged at the two ends of the notch of the standardization fixture, and the tensioning bolts are used to tighten and loosen the standardization fixture; The pressure release well closed pressurization operation platform includes a platform support frame, a platform bottom plate, a platform side plate and an L-shaped side plate connecting piece; the platform support frame is installed on the ground to support the entire platform; the platform bottom plate is installed on the platform support frame and fixed; the platform side plate is connected to the platform bottom plate to form a platform as a whole, and the platform side plates are fixedly connected by iron nails using L-shaped side plate connecting pieces; Characterized in that the construction method comprises the following steps: S1. Construction layout: Before excavating the foundation pit, the original ground elevation, excavation width, and precise layout should be performed; S2. Excavation of foundation pit: The foundation pit is excavated by open excavation method, with segmented excavation, layered slope, support while excavating, and strict over-excavation or disturbance of the base soil, and excavation to the designed elevation; S3. Construction of cushion layer and waterproof layer: After the excavation of the foundation pit is completed and the precipitation effect is ensured, the axis and elevation are corrected and checked, and pumped concrete is used for pouring. Before pouring the cushion layer, the foundation pit needs to be manually leveled, and the width is measured and laid out to ensure that it does not affect the structural construction. The waterproof layer is constructed with polymer self-adhesive waterproof membrane; S4. Construction of water collection tank: Tie and fix the steel bars and embedded parts of the water collection tank according to the construction requirements, and then carry out the construction of the frame structure water collection tank template. The L-shaped slide rail is installed on the cushion layer and arranged on both sides of the tied steel bars. The steel template is installed and fixed on the L-shaped slide rail, and steel pipe back ribs are installed near the upper and lower ends to connect them as a whole. At the same time, steel pipe diagonal braces are used for support. One end of the steel pipe diagonal brace is supported on the steel template, and the other end is welded with a clamp, which is fixed and clamped on the steel pipe. The welded end plate on the clamp is used to fix and weld to the bottom end of the steel pipe diagonal brace. The scaffolding is installed from the ground according to construction needs; S5. Side ditch reinforcement binding and formwork: The tire frame pad is fixed to the side ditch reinforcement cage binding position by soil nails. A plurality of reinforcement holes are opened on the frame reinforcement support plate, and lateral fixing plates of the support plate are installed on both sides and fixed to the tire frame pad by iron nails. The concave pad is fixed to the tire frame pad by iron nails at equal intervals along the tunnel direction. The reinforcement fixing ring is embedded in the concave pad to position and fix the reinforcement. The reinforcement is bound and the formwork is supported. The sleeve bracket is fixed to the reinforcement at equal intervals between the templates in the vertical tunnel direction. The standardized top-to-top easy-to-remove side formwork system adopts a screw sleeve connector with threads inside, which is convenient for the screw to rotate in. The screw is rotated in from both ends of the screw sleeve connector through the handles, and the other end is pressed against the template to remove the formwork. The circular sleeve is fixed to the sleeve bracket by welding to achieve the fixed positioning of the screw. S6. Drainage box culvert construction: For transverse box culverts, during construction, the ditch is excavated according to the rectangular cross-section rule, the base is compacted to meet the density requirements, and the base is kept dry. During construction, the side ditch is smooth and straight, and smoothly connected with the pump house water inlet; S7. Pipeline installation: Prefabricate a temporary fixture for pipeline installation in advance. A joint is provided in the middle of the fixture to facilitate pipeline welding. A bolt hole is provided in the middle of the pull ear plate, which is arranged at the top of the fixture. The pull bolts are used to fasten the pull ear plate through the bolt holes. The pipeline is hoisted to the designated position by a crane. The pipeline is installed horizontally and vertically. The fixture is placed on the interface of the two pipelines to connect and weld the pipelines. S8. Erection and construction of pressure release well platform: The platform support frame is installed on the ground to support the entire platform. The platform bottom plate is installed on the platform support frame and fixed. The platform side plates are connected to the platform bottom plate to form a whole platform. The platform side plates are fixedly connected by L-shaped side plate connectors through iron nails. The retractable ladder is installed on the outside of the platform side plates. The pressure release well is placed in the operating platform, and the pipeline is connected to the pressure release well through the opening on the platform side plate. S9. Construction of inspection wells and valve wells, and power-on test operation.

2. The construction method of the urban open-cut underpass tunnel drainage system according to claim 1 is characterized by: The adjustable side ditch steel cage stereotyped in-situ binding tire frame is also provided with a support plate lateral fixing plate; the support plate lateral fixing plate is positioned on both side edges of the frame-type steel support plate.

3. The construction method of the urban open-cut underpass tunnel drainage system according to claim 2 is characterized by: The support plate lateral fixing plate is fixed to the tire frame pad by iron nails, and the frame-type steel bar support plate is vertically positioned on the tire frame pad from both side edges of the frame-type steel bar support plate; the concave pad is fixed to the tire frame pad by iron nails at equal intervals.

4. The construction method of the urban open-cut underpass tunnel drainage system according to claim 1 is characterized by: The steel formwork is installed with steel pipe back ribs near both ends to connect them as a whole; one end of the steel pipe diagonal support is supported on the steel formwork, and a clamp is welded on the other end; the clamp is fixedly clamped on the steel pipe.

5. The construction method of the urban open-cut underpass tunnel drainage system according to claim 1 is characterized by: It also includes a welding end plate, which is used for being fixedly welded to the bottom end of the steel pipe diagonal support.

6. The construction method of the urban open-cut underpass tunnel drainage system according to claim 1 is characterized by: A bolt hole is provided in the middle of the pulling ear plate and is arranged at the top end of the shaping fixture. The pulling bolt fastens the pulling ear plate through the bolt hole.

7. The construction method of the urban open-cut underpass tunnel drainage system according to claim 1 is characterized by: It also includes a pipeline and a pressure release well; the pressure release well is placed in the operating platform, and the pipeline is connected to the pressure release well through an opening on the platform side plate.

8. The construction method of the urban open-cut underpass tunnel drainage system according to claim 1 is characterized by: A retractable ladder and a climbing ladder are also provided; the retractable ladder is installed on the outer side of the platform side plate; the climbing ladder is vertically installed on the inner side of the platform.

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