Pouring trolley and construction method for building side ditch concrete in high-speed rail tunnel excavation

Abstract

The invention relates to the technical field of building construction, and provides a pouring trolley and a construction method for building side ditch concrete in high-speed rail tunnel excavation. The pair of portal stand columns are oppositely arranged on the two sides of the bottom of the portal cross beam; the pair of bearing cross beams are horizontally and correspondingly arranged on the sides, away from the portal cross beams, of the portal stand columns; the first end of each cross beam reinforcing diagonal draw bar is connected with the corresponding portal stand column, and the second end of each cross beam reinforcing diagonal draw bar is connected with the end, away from the corresponding portal stand column, of the corresponding bearing cross beam; and the first end of the cross beam reinforcing diagonal draw bar is spaced from the portal cross beam. The cross beam reinforcing diagonal draw bar can be prevented from intersecting with a construction ventilation zone, the ventilation zone is prevented from being compressed and even punctured, and the ventilation effect is prevented from being affected; the concrete construction method can effectively control the quality defects of expansion cracks, bubbles and the like easily generated by the side ditch concrete, and avoids the problem of ditch leakage caused by serious expansion cracks generated by the side ditch concrete.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a pouring trolley and construction method for concrete in the side ditch of a high-speed railway tunnel. Background Technology

[0002] In the existing technology, the trolley device usually interferes with the normal construction ventilation during the process of pouring concrete for water ditches and cable trenches, causing the ventilation belt to be compressed or even punctured, thus affecting the ventilation effect.

[0003] Existing concrete construction methods for water ditches and cable trenches often result in expansion and contraction cracks in the concrete, leading to leakage and serious quality defects. Summary of the Invention

[0004] This invention provides a pouring trolley and construction method for concrete in the construction of side ditches during high-speed railway tunnel excavation. The pouring trolley is used to solve the defects in the prior art where the trolley device interferes with normal construction ventilation, causing air belt compression and affecting ventilation effect, thus ensuring normal ventilation during tunnel excavation. The construction method is used to solve the quality defects such as expansion cracks and air bubbles that are easily generated in the concrete of the side ditch construction method in the prior art, thus controlling the problem of serious expansion cracks in the side ditch concrete and causing water leakage.

[0005] This invention provides a pouring trolley for constructing concrete for side ditches during high-speed railway tunnel excavation, used to support the side ditches formwork. The trolley device includes: The portal frame beam is set parallel to the horizontal plane; A pair of gantry columns are positioned opposite each other on both sides of the bottom of the gantry beam; A pair of load-bearing crossbeams are respectively horizontally positioned on the side of the gantry column away from the gantry crossbeams, and the bottom of the load-bearing crossbeams is connected to the side ditch template; A pair of crossbeam-reinforced diagonal braces, each of which has a first end connected to the gantry column and a second end connected to the end of the load-bearing crossbeam away from the gantry column; The first end of the crossbeam reinforcement diagonal brace is spaced apart from the gantry crossbeam so that the crossbeam reinforcement diagonal brace avoids the construction ventilation zone.

[0006] According to the present invention, a concrete pouring trolley for constructing side ditches during high-speed railway tunnel excavation further includes: The hydraulic jack lifting device is connected at its top to the bottom side of the supporting crossbeam and at its bottom to the side ditch template.

[0007] According to the present invention, a pouring trolley and construction method for constructing side ditch concrete in high-speed railway tunnel excavation are provided, wherein the hydraulic jack lifting device comprises multiple components, and the side ditch template includes: The side wall formwork is vertically installed and hinged to the gantry column; The first box-shaped template, the second box-shaped template, and the third box-shaped template are arranged on the side of the side wall template away from the gantry column; The side wall template, the first box template, the second box template, and the third box template are respectively connected to the hydraulic jack lifting device.

[0008] According to the present invention, a pouring trolley and construction method for building side ditch concrete in high-speed railway tunnel excavation are provided, wherein the hydraulic jack lifting device is slidably disposed on the bearing crossbeam, and a lateral spacing adjustment device is provided between at least two of the hydraulic jack lifting devices.

[0009] The present invention provides a concrete pouring trolley and construction method for building side ditches in high-speed railway tunnel excavation, which further includes: The side wall support and reinforcement device is hinged at one end to the gantry column and connected to the side wall template at the other end.

[0010] The present invention provides a concrete pouring trolley and construction method for building side ditches in high-speed railway tunnel excavation, which further includes: The self-lifting rail traveling device is installed on the bottom side of the gantry column; The travel track is located at the bottom of the rail lifting device, and the self-lifting travel device can drive the travel track forward.

[0011] According to the present invention, a pouring trolley and construction method for building side ditch concrete in high-speed railway tunnel excavation are provided, wherein the bottom of the first box formwork and the third box formwork are provided with vent holes.

[0012] According to the present invention, a concrete pouring trolley for building side ditches in high-speed railway tunnel excavation is provided. The top opening of the first box formwork, the second box formwork and the third box formwork is larger than the bottom size. The size is determined according to the depth of the trench. Generally, the top opening of the cable trench and the bottom opening of the water trench are 2 cm and 4 cm larger, respectively, and the cross-sectional area of ​​the trench is not less than the design area. In particular, the size of the water trench must meet the design flow requirements.

[0013] According to the present invention, a concrete pouring trolley for building side ditches in high-speed railway tunnel excavation also includes a gantry brace, one end of which is connected to the bottom of the gantry beam, and the other end of which is connected to the gantry column.

[0014] This invention also provides a construction method for building concrete side ditches during high-speed railway tunnel excavation, comprising: S1. Provide a vehicle device, set up a gantry beam parallel to the horizontal plane and a pair of gantry columns opposite to each other on both sides of its bottom, and move it to the construction position of the side ditch. S2. A pair of crossbeams are used to reinforce and support the load-bearing crossbeams. One end of each crossbeam reinforcement diagonal brace is connected to the gantry column, and the other end is connected to the end of the load-bearing crossbeam away from the gantry column. In step S1, when positioning the trolley device, ensure that there is a preset interval between the connection point of the crossbeam reinforcement diagonal brace and the gantry column and the top gantry crossbeam, so that the overall structure of the trolley device can pass under the construction ventilation belt or be positioned beside it, thus achieving effective avoidance of the construction ventilation belt. S3. After the side ditch template is stably supported and positioned by the trolley device, the concrete pouring operation of the side ditch is carried out.

[0015] This invention provides a pouring trolley and construction method for concrete in the construction of side ditches during high-speed railway tunnel excavation. A gantry beam is set parallel to the horizontal plane, with a pair of gantry columns positioned opposite each other on either side of the bottom of the gantry beam. A pair of load-bearing beams are respectively positioned on the side of the gantry columns away from the gantry beam. The bottom of the load-bearing beams suspends the side ditches formwork. The first end of the reinforcing diagonal brace of the beam is connected to the gantry column, and the second end is connected to the end of the load-bearing beam away from the gantry. The first end of the reinforcing diagonal brace is spaced apart from the gantry beam to avoid the construction ventilation zone, thus preventing the reinforcing diagonal brace from intersecting with the construction ventilation zone, ensuring normal ventilation during excavation, and guaranteeing the construction ventilation effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the concrete pouring trolley for the side ditch in the excavation of a high-speed railway tunnel provided by the present invention.

[0018] Figure 2 This is a schematic diagram of the distribution structure of the exhaust holes provided by the present invention.

[0019] Figure 3 The present invention provides a V-shaped induced seam structure.

[0020] Figure 4 This is a distribution diagram of the reserved holes in the drainage pipe provided by the present invention.

[0021] Figure 5 This is a construction process flow chart provided by the present invention.

[0022] Figure label: 100. Construction ventilation strip; 200. Invert arch filling top surface; 300. Side ditch formwork; 1. Portal frame crossbeam; 2. Portal frame column; 3. Load-bearing crossbeam; 4. Crossbeam reinforcement diagonal brace; 5. Hydraulic jack lifting device; 6. Side wall formwork; 7. First box formwork; 8. Second box formwork; 9. Third box formwork; 10. Lateral spacing adjustment device; 11. Support and reinforcement device; 12. Automatic rail lifting mechanism; 13. Vent hole; 14. Portal frame diagonal brace; 15. V-shaped induced joint structure; 16. Drainage pipe reserved hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] The following is combined with Figures 1-4 The present invention describes a concrete pouring trolley for building side ditches in high-speed railway tunnel excavation, used to support the side ditches formwork 300, including a gantry beam 1, a pair of gantry columns 2, a pair of supporting beams 3, and a pair of beam-reinforcing diagonal tie rods 4.

[0025] A portal frame beam 1 is set parallel to the horizontal plane; a pair of portal frame columns 2 are set opposite each other on both sides of the bottom of the portal frame beam 1, and the portal frame columns 2 are used to support the portal frame beam 1; a pair of load-bearing beams 3 are respectively set horizontally on the side of the portal frame columns 2 away from the portal frame beam 1, and the bottom of the load-bearing beams 3 suspends the side trench formwork. The first end of each beam reinforcing diagonal brace 4 is connected to the portal frame column 2, and the second end is connected to the end of the load-bearing beam 3 away from the portal frame column 2. The first end of the beam reinforcing diagonal brace 4 is spaced apart from the portal frame beam 1 so that the beam reinforcing diagonal brace 4 avoids the construction ventilation zone 100. By reducing the height of the load-bearing beams 3, the beam reinforcing diagonal brace 4 is prevented from intersecting with the construction ventilation zone, thus avoiding interference with construction ventilation, ensuring normal ventilation during excavation, and ensuring the construction ventilation effect.

[0026] In some feasible embodiments of the present invention, a hydraulic jack lifting device 5 is also included, with its top end connected to the bottom side of the supporting crossbeam 3 and its bottom end connected to the side ditch template. By providing the hydraulic jack lifting device 5, the position of the side ditch template relative to the supporting crossbeam 3 can be appropriately adjusted.

[0027] In some feasible embodiments of the present invention, the hydraulic jack lifting device 5 has multiple components, and the side ditch template includes a side wall template 6, a first box template 7, a second box template 8, and a third box template 9. The side wall template 6 is vertically arranged and hinged to the gantry column 2. The first box template 7, the second box template 8, and the third box template 9 are arranged on the side of the side wall template 6 away from the gantry column 2. The side wall template 6, the first box template 7, the second box template 8, and the third box template 9 are respectively connected to the hydraulic jack lifting device 5. Concrete is poured between the side wall template 6, the first box template 7, the second box template 8, and the third box template 9. The first box template 7, the second box template 8, and the third box template 9 are used to form a communication cable trough, a water ditch, and a power cable trough, respectively.

[0028] Among them, since the hydraulic jack lifting device 5 used for the water ditch has a long stroke, multi-stage hydraulic jacks can be used.

[0029] like Figure 3 As shown, in addition, V-shaped induced joint structures 15 are welded and fixed at longitudinal intervals of 3 meters on the side wall formwork 6, the first box formwork 7, the second box formwork 8, and the third box formwork 9. Specifically, the V-shaped induced joint structure 15 can be a V-shaped solid steel with a side length of 6-10 mm. All transverse construction joints are treated as expansion joints to prevent expansion cracks from easily occurring in long strip-shaped (length-to-width ratio greater than 3) concrete foundations. A 1.5 cm thick polyethylene foam board is installed at the transverse construction joint. The joint of the drainage ditch is sealed with silicone sealant within a 3 cm depth range to reduce expansion cracks and water leakage in the concrete of the building's side ditch.

[0030] In some feasible embodiments of the present invention, the hydraulic jack lifting device 5 is slidably disposed on the bearing beam 3, and a lateral spacing adjustment device 10 is provided between at least two hydraulic jack lifting devices 5. The spacing between the corresponding box templates is adjusted by the lateral spacing adjustment device 10, thereby adapting to different spacings between the slots.

[0031] In some feasible embodiments of the present invention, a support and reinforcement device 11 is also included, one end of which is hinged to the gantry column 2 and the other end is connected to the side wall formwork 6. The support and reinforcement device 11 is used to ensure that the side wall formwork 6 is fixed in position. Moreover, the support and reinforcement device 11 is connected to the gantry column 2, eliminating the need for ground support and reducing damage to the invert arch filling concrete 200.

[0032] In some feasible embodiments of the present invention, a self-lifting rail traveling device and a traveling track (not shown in the figure) are also included. The self-lifting rail traveling device is disposed on the bottom side of the gantry column 2; the traveling track is disposed at the bottom of the self-lifting rail traveling device, and the self-lifting rail traveling device can drive the traveling track forward. The self-lifting rail traveling device greatly reduces labor intensity, improves construction efficiency, and reduces construction costs.

[0033] It should be noted that the self-lifting rail walking device is existing technology, and the specific structure is not limited, as long as it can drive the walking rail to move forward on its own.

[0034] In some feasible embodiments of the present invention, vent holes 13 are provided at the bottom of both the first box template 7 and the third box template 9. The vent holes 13 can significantly reduce the generation of air bubbles in the concrete and reduce defects in the appearance quality of the concrete. More specifically, the vent holes 13 are arranged in a staggered pattern with a spacing of 20 cm and a diameter of 5-8 mm.

[0035] In addition, such as Figure 4 As shown, a pre-drainage pipe hole 15 can also be laser-cut on the side ditch template 300. The diameter of the pre-drainage pipe hole is 1 cm larger than the outer diameter of the blind pipe to ensure accurate positioning and firm fixation of the drainage pipe.

[0036] In some feasible embodiments of the present invention, the top opening of the first box template 7, the second box template 8 and the third box template 9 is larger than the bottom size. The size is determined according to the depth of the trench. Generally, the top opening of the cable trench and the bottom opening of the water trench are 2 cm and 4 cm larger, respectively, to ensure that the cross-sectional area of ​​the trench is not less than the design area. In particular, the size of the water trench must meet the design flow requirements.

[0037] In some feasible embodiments of the present invention, a gantry brace 14 is also included, one end of which is connected to the bottom of the gantry beam 1, and the other end of the gantry brace 14 is connected to the gantry column 2.

[0038] Furthermore, the supporting crossbeam 3 is a telescopic beam, comprising a first crossbeam, a second crossbeam, and a telescopic mechanism. The first end of the telescopic mechanism is mounted on the first crossbeam, and one end of the first crossbeam is connected to the gantry column 2. The second crossbeam is connected to the end of the first crossbeam facing away from the gantry column 2. The second end of the telescopic mechanism is mounted on the second crossbeam. By extending and retracting the telescopic mechanism, the length of the second crossbeam can be adjusted, thereby controlling the distance between the side ditch template and the gantry column 2, allowing for flexible control of the side ditch template's position.

[0039] The concrete pouring trolley for building side ditches in high-speed railway tunnel excavation provided by this invention can pour concrete for water ditches and cable trenches during tunnel excavation without affecting transportation and construction ventilation during normal tunnel excavation, and without damaging the already poured invert arch filling concrete 200. It advances the construction of water ditches and cable trenches, overcomes the problems of large concentrated construction volume and tight schedule in the middle and later stages, and saves sufficient time for subsequent construction.

[0040] This invention also provides a method for constructing concrete side ditches during high-speed railway tunnel excavation, comprising: S1. Provide a vehicle device, set up a gantry beam parallel to the horizontal plane and a pair of gantry columns 2 set on both sides opposite to its bottom, and move it to the side ditch construction position. S2. A pair of crossbeams are used to reinforce and support the load-bearing crossbeams 3. One end of each crossbeam reinforcement diagonal brace 4 is connected to the gantry column 2, and the other end is connected to the end of the load-bearing crossbeam 3 away from the gantry column 2. In step S1, when positioning the trolley device, ensure that there is a preset interval between the connection point of the crossbeam reinforcing diagonal tie rod 4 and the gantry column 2 and the top gantry crossbeam 1, so that the overall structure of the trolley device can pass under the construction ventilation belt 100 or be positioned beside it, thus achieving effective avoidance of the construction ventilation belt 100. S3. After the side ditch formwork 300 is stably supported and positioned by the trolley device, the concrete pouring operation of the side ditch is carried out. The pouring process and method effectively control the quality defects such as expansion cracks and air bubbles that are prone to occur in the side ditch concrete, and avoid the problem of water leakage caused by serious expansion cracks in the side ditch concrete.

[0041] The formwork is suspended and lifted using a hydraulic jack lifting device 5, which ensures that the jack stroke is not less than the trench depth and that the trolley device does not scrape or bump the concrete during the forward movement. If necessary, the support point is set inside the trench formwork box, which improves construction efficiency and reduces the labor intensity of workers.

[0042] In addition, due to the limitations of conventional mounting equipment such as loaders or excavators, the hanging height of the ventilation belt is generally 5.5 meters and the vertical suspension height is 3.5 meters. By reducing the height of the suspension beam and using a hydraulic jack lifting device to lift the side ditch formwork, it is ensured that the height of the suspension beam of the side ditch formwork is lower than the bottom of the ventilation belt, so that the normal ventilation of the ventilation belt is not disturbed during the construction of concrete ditches and cable trenches.

[0043] The bottom mold of the box body has 13 vent holes arranged in a quincunx pattern with a spacing of 20 cm and a diameter of 5-8 mm, which greatly reduces the generation of air bubbles in the concrete and reduces defects in the appearance quality of the concrete.

[0044] The present invention relates to a concrete pouring trolley and construction method for building side ditches in high-speed railway tunnel excavation, the main construction process of which is as follows: 1. Trolley assembly, debugging and acceptance Before assembly, check whether all parts are complete and intact, and check whether each box template is deformed; under the guidance of the manufacturer's technicians, assemble the trolley on site; after assembly, the manufacturer's technicians will operate and test run it to check whether the walking system, lifting system and circuit control switches are sensitive and effective; after the trial run is qualified, the inspection and acceptance procedures will be carried out; after the acceptance is qualified, the panel will be polished and a release agent will be applied before it can be put into use.

[0045] 2. Measurement and layout Precision measuring instruments were used to determine the plane positioning points of the template, and horizontal elevation points were determined on the side wall. Lines were drawn based on the elevation points, and the template alignment was checked with a spirit level.

[0046] 3. Optimize concrete mix proportions Low heat of hydration and retarded cement should be selected. While meeting the strength requirements, the amount of cement or water should be appropriately reduced to lower the water-cement ratio. Appropriate amounts of retarder and water-reducing agent should be used to improve concrete performance and reduce the peak heat of hydration. The concrete mix design should be three-graded. The maximum particle size of coarse aggregate should be 31.5 mm. Medium sand with a mud content of approximately 1.5%–2.0% should be used, and gravel with a mud content of no more than 1.5% should be used. If the mud content of the sand and gravel is too high, it will not only increase the shrinkage of the concrete but also reduce the tensile strength of the concrete. While meeting the requirements for concrete transportation and placement, the slump should be minimized as much as possible, and the slump should generally be controlled at 10–15 cm.

[0047] 4. Concrete Surface Treatment For the concrete contact surface of the side wall, roughen the surface and apply an interface agent. When using an excavator and milling head for mechanical roughening of the large surface, the concrete strength should not be less than 10 MPa. When using a pneumatic pick or electric pick for manual roughening of the small surface, the concrete strength should not be less than 2.5 MPa. The cement laitance on the surface of the poured concrete must be removed to expose the coarse aggregate. The roughened area should not be less than 75% of the total concrete area. After the roughened concrete surface is washed with high-pressure water and blown clean with high-pressure air, an interface agent should be applied.

[0048] 5. Installation of side wall reinforcement The sidewall reinforcement of the ditch uses small-diameter, small-spacing steel mesh to ensure a reinforcement ratio of not less than 0.3%, thereby improving the tensile strength of reinforced concrete and enhancing the internal crack resistance of the concrete structure. The mesh spacing is generally 15 cm × 15 cm, with Φ16 threaded steel bars for the transverse reinforcement and Φ10 round steel bars for the longitudinal reinforcement.

[0049] 6. Installation of embedded parts (grounding terminals, blind drainage pipes, etc.) The grounding terminal is tightly attached to the template, and the port is sealed with a rubber plug and fixed with a steel reinforcement bracket; the drainage pipe uses a special connector with a pipe diameter larger than the outer diameter of the drainage pipe, and a socket joint is not allowed. It is fixed through the positioning hole of the drainage pipe to ensure accurate positioning of the blind pipe, firm fixation and smooth drainage.

[0050] 7. Trolley positioning and template installation The trolley is positioned and fixed according to the survey points, and the box template is installed and fixed by telescopic hydraulic jacks, and the end steel mold is installed.

[0051] 8. Concrete pouring and vibration The concrete pouring of the side ditch adopts the skip-pour method, with each section being 12 meters long. The interval between skip-pours is no less than 7 days to prevent expansion cracks from easily occurring in long strip-shaped (length-to-width ratio greater than 3) concrete foundations. All transverse construction joints are set as expansion joints, and 1.5 cm thick polyethylene foam boards are installed at the transverse construction joints. Silicone sealant is used to seal within a 3 cm depth to reduce expansion cracks and water leakage in the construction side ditch concrete.

[0052] The concrete is poured in layers on both sides of the chute, symmetrically, with each layer being 50 cm thick. The concrete temperature upon placement should not exceed 25 degrees Celsius. An immersion vibrator is used for layered compaction, with the vibrator inserted quickly and withdrawn slowly. The vibrator should be inserted 10 cm into the lower layer of concrete. The principle is to ensure that the concrete stops settling, the surface becomes slurry, and no more air bubbles emerge. The vibration should be neither excessive nor incomplete. Secondary vibration should be performed on key areas such as the bottom of the chute to ensure that the concrete is compacted. When the concrete is poured to the top, it is manually compacted and smoothed three times before initial setting.

[0053] 9. Concrete formwork removal When the concrete rebound strength reaches 10 MPa, demolding should begin with removing the end formwork, followed by the trench body formwork. The trench body formwork should be lifted as a whole in one go using hydraulic jacks to prevent the formwork from scraping against the concrete edges and ensure that the concrete is not damaged. If conditions permit, the demolding time can be appropriately extended to effectively insulate and retain moisture in the concrete.

[0054] 10. Move the trolley forward. The trolley travels to the next trench concrete pouring station via a self-lifting rail travel device, repeating the above 7-9 steps of the construction process.

[0055] 11. Concrete curing Within 12 hours after concrete pouring, cover with geotextile to keep it moist and maintain moisture. Sprinkle water 3-4 times a day for curing, and the curing time should not be less than 14 days.

[0056] Maintaining a humid environment during the curing of concrete side ditches not only promotes cement hydration but also enhances strength, prevents shrinkage cracks caused by surface moisture dissipation, and reduces shrinkage.

[0057] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pouring trolley for constructing concrete for side ditches during high-speed railway tunnel excavation, used to support the side ditches formwork (300), characterized in that, include: The portal frame beam (1) is set parallel to the horizontal plane; A pair of gantry columns (2) are disposed opposite to each other on both sides of the bottom of the gantry beam (1); A pair of load-bearing beams (3) are respectively horizontally positioned on the side of the gantry column (2) away from the gantry beam (1), and the bottom of the load-bearing beams (3) suspends the side ditch template (300). A pair of crossbeam reinforcing diagonal braces (4), the first end of each of the crossbeam reinforcing diagonal braces (4) is connected to the gantry column (2), and the second end is connected to the end of the load-bearing crossbeam (3) away from the gantry column (2); The first end of the crossbeam reinforcement diagonal brace (4) is spaced apart from the gantry crossbeam (1) so that the crossbeam reinforcement diagonal brace (4) avoids the construction ventilation zone (100).

2. The concrete pouring trolley for constructing side ditches during high-speed railway tunnel excavation according to claim 1, characterized in that, Also includes: The hydraulic jack lifting device (5) is connected at the top to the bottom side of the bearing beam (3) and at the bottom to the side ditch template.

3. The concrete pouring trolley for constructing side ditches during high-speed railway tunnel excavation according to claim 2, characterized in that, The hydraulic jack lifting device (5) has multiple components, and the side ditch template includes: The side wall formwork (6) is set vertically and hinged to the gantry column (2); The first box template (7), the second box template (8), and the third box template (9) are arranged on the side of the side wall template (6) away from the gantry column (2); The side wall template (6), the first box template (7), the second box template (8) and the third box template (9) are respectively connected to the hydraulic jack lifting device (5).

4. The concrete pouring trolley for constructing side ditches during high-speed railway tunnel excavation according to claim 3, characterized in that, The hydraulic jack lifting device (5) is slidably mounted on the bearing beam (3), and a lateral spacing adjustment device (10) is provided between at least two of the hydraulic jack lifting devices (5).

5. The concrete pouring trolley for constructing side ditches during high-speed railway tunnel excavation according to claim 3, characterized in that, Also includes: The support and reinforcement device (11) is hinged at one end to the gantry column (2) and connected at the other end to the side wall template (6).

6. The concrete pouring trolley for constructing side ditches during high-speed railway tunnel excavation according to any one of claims 1-5, characterized in that, Also includes: An automatic rail feeding mechanism (12) is provided on the bottom side of the gantry column (2); The walking track is located at the bottom of the automatic track lifting mechanism (12), and the automatic track lifting mechanism (12) can drive the walking track forward.

7. The concrete pouring trolley for constructing side ditches during high-speed railway tunnel excavation according to claim 3, characterized in that, The bottom of the first box template (7) and the third box template (9) are provided with exhaust holes (13).

8. The concrete pouring trolley for constructing side ditches during high-speed railway tunnel excavation according to claim 3, characterized in that, The top openings of the first box template (7), the second box template (8), and the third box template (9) are larger than the bottom dimensions.

9. The concrete pouring trolley for constructing side ditches during high-speed railway tunnel excavation according to claim 6, characterized in that, It also includes a gantry brace (14), one end of which is connected to the bottom of the gantry beam (1), and the other end of the gantry brace (14) is connected to the gantry column (2).

10. A construction method for building concrete side ditches during high-speed railway tunnel excavation, characterized in that, include: S1. Provide a vehicle device, set a gantry beam parallel to the horizontal plane and a pair of gantry columns (2) set on both sides opposite to its bottom, and move it to the side ditch construction position. S2. A pair of crossbeam reinforcement diagonal braces (4) are used to reinforce and support the load-bearing crossbeam (3). One end of each crossbeam reinforcement diagonal brace (4) is connected to the gantry column (2), and the other end is connected to the end of the load-bearing crossbeam (3) away from the gantry column (2). In step S1, when positioning the trolley device, ensure that there is a preset interval between the connection point of the crossbeam reinforcing diagonal brace (4) and the gantry column (2) and the top gantry crossbeam (1), so that the overall structure of the trolley device can pass under the construction ventilation belt (100) or be positioned on its side, thereby achieving effective avoidance of the construction ventilation belt (100). S3. After the side ditch template is stably supported and positioned by the trolley device, the concrete pouring operation of the side ditch is carried out. The concrete pouring process and method effectively control the quality defects such as expansion cracks and air bubbles that are prone to occur in the side ditch concrete, and avoid the problem of water leakage caused by serious expansion cracks in the side ditch concrete.

Images