Riverbed in-situ curing construction equipment for railway pier scouring protection

Abstract

The utility model discloses riverbed in-situ curing construction equipment for scouring protection of railway piers, which comprises a power head, a rotating arm, a rotary cutting mixing head, a core tube, a material conveying tube, a powder spraying machine, a material storage device and an excavator, the rotating arm is connected with the power head and the rotary cutting mixing head, and the power of the power head is transmitted to the rotary cutting mixing head; the core pipe is arranged at the centers of the power head, the rotating arm and the rotary-cutting mixing head from top to bottom, on one hand, the core pipe serves as a fixing rod to connect the power head, the rotating arm and the rotary-cutting mixing head, and on the other hand, the core pipe serves as a curing agent channel to convey a curing agent to the rotary-cutting mixing head, and the rotary-cutting mixing head conducts all-dimensional three-dimensional stirring on a soil body; the excavator carries the power head, the rotating arm and the rotary cutting mixing head, provides driving force for the power head through a hydraulic system of the excavator and provides power for in-situ curing construction equipment, the excavator can flexibly move in a reinforcing area, and it is ensured that no dead angle is left in the reinforcing area.

Description

TECHNICAL FIELD

[0001] The utility model relates to a riverbed in-situ solidification construction equipment, especially a riverbed in-situ solidification construction equipment for railway bridge pier scour protection. BACKGROUND

[0002] River scour is one of the main diseases of railway bridges, especially for old bridges, long-term river scour can cause the riverbed to be damaged by undercutting, forming a large range of scour pits; leading to the destruction of the vertical skirt of the existing paving end, the local scouring of the pavement, and further causing the damage of the existing bridge pier and abutment, the peeling of the foundation concrete, the exposure of the reinforcement, and the emptying of the bridge foundation, etc. The reduction of the pile foundation depth can greatly reduce the bearing capacity of the lower structure of the bridge, and in serious cases, it can cause the pier and abutment to tilt or even collapse, greatly affecting the safety of railway operation. In addition, due to the limitations of economic and technical conditions at that time, the design standards of early railway bridges in China are generally low, resulting in small net clearance under old bridges and insufficient renovation construction space, greatly increasing the difficulty of processing the riverbed scour problem of old railway bridges. For riverbed scour protection of operating lines, riprap protection and riverbed paving protection are commonly used for processing. Among them, the riprap protection has poor integrity, high maintenance cost and large workload, especially when the river flow velocity increases sharply in the rainy season or the riverbed surface changes greatly, the relative position changes, and the protection effect is easily lost; the riverbed paving protection has certain strength and rigidity, and is not easy to break due to scouring, but the common riverbed paving protection often uses concrete materials, which consumes time and effort in construction, and the paving quality is difficult to guarantee due to insufficient construction space, and the location of old railway bridges is relatively remote, making it inconvenient to transport concrete.

[0003] At present, solidified soil is applied in highway engineering pavement structure layer treatment, riverbed dredging bottom silt treatment, soft soil foundation treatment, and offshore wind power pile foundation surrounding backfilling, etc. Influenced by existing construction machinery and equipment of cement soil and concrete, the commonly used solidified soil construction method includes mixing and filling and pressure, and flow state solidified soil mixing and pumping. In addition, in the solidification construction of silt soil, the in-situ solidification method is adopted for solidified soil construction, and a matching construction machinery is designed for construction. However, the current construction equipment is not suitable for riverbed in-situ solidification construction around operating railway bridges. UTILITY MODEL CONTENT

[0004] In order to solve the defects in the prior art, the utility model discloses a riverbed in-situ solidification construction equipment for railway bridge pier scour protection, and the technical scheme is as follows:

[0005] The riverbed in-situ solidification construction equipment for railway pier scour protection comprises a power head, a rotating arm, a rotary cutting mixing head, a core pipe, a material conveying pipe, a powder spraying machine, a material storage device and a excavator, characterized in that the power head is driven to rotate by a hydraulic motor; the upper end of the rotating arm is in transmission with the driving shaft of the power head through a spline engagement; the rotary cutting mixing head is fixedly connected with the lower end of the rotating arm through a stirring shaft; the core pipe penetrates through the center of the power head, the rotating arm and the rotary cutting mixing head, and the upper end of the core pipe is connected with the material conveying pipe; the powder spraying machine injects a solidifying agent into the core pipe through the material conveying pipe; and the excavator provides hydraulic power.

[0006] Preferably, the power head comprises a power head shell connected with the excavator through a connecting member; two hydraulic motors are fixedly connected with driving gears through splines; the driving shaft is installed in the power head shell through a bearing, and the middle part is fixedly connected with a driven gear through a spline, which is engaged with the driving gears of the hydraulic motors; and a speed change valve is arranged on the side of the power head shell. Preferably, the driving shaft is a hollow columnar structure, the upper end of the driving shaft is fixedly connected with the power head shell through a bearing, the driving shaft can freely rotate, the middle part of the driving shaft is fixedly connected with a driven gear through a spline, the driven gear is engaged with the driving gears of the two hydraulic motors respectively to form a gear set, the gear set is located in the power head shell, the hydraulic motors drive the driving shaft to rotate through the gear set, and the lower end of the driving shaft is further provided with an external spline.

[0007] Preferably, the side of the power head shell is further provided with a speed change valve.

[0008] Preferably, the rotating arm is a hollow columnar structure, the upper end of the rotating arm is provided with an internal spline, the internal spline of the upper end of the rotating arm is engaged with the external spline of the lower end of the driving shaft, the rotation of the driving shaft drives the rotating arm to rotate, the lower end of the rotating arm is provided with a lower flange, the length of the rotating arm is 1 m, 1.5 m, 2 m or 3 m, and the rotating arm can be customized and adjusted according to actual needs.

[0009] Preferably, the rotary cutting mixing head comprises a stirring shaft, rotary cutting tool shafts, rotary cutting tools and a sharp head; the stirring shaft is a hollow columnar structure, the upper end of the stirring shaft is provided with an upper flange, the upper flange of the stirring shaft is fixedly connected with the lower flange of the rotating arm through bolts, and the stirring shaft can rotate together with the rotating arm; four rotary cutting tool shafts are uniformly installed on the middle part of the stirring shaft along the circumference, a plurality of rotary cutting tools are welded on the front part of the rotary cutting tool shafts along the circumference, the rotary cutting tools are arranged in a spiral shape, and four groups of rotary cutting tools can revolve together with the stirring shaft; and a small gear is further fixedly installed on the rear end of the rotary cutting tool shaft.

[0010] Preferably, the lower part of the stirring shaft is provided with a powder spraying port, and an inclined plate is fixedly arranged above the powder spraying port; and the tail end of the stirring shaft is further provided with a sharp head.

[0011] Preferably, the core pipe passes through the power head shell, the driving shaft, the rotating arm and the stirring shaft from top to bottom and is in a central position, wherein the upper part of the core pipe is fixedly connected with the power head shell, and the upper end is reserved for an interface to be connected with the material conveying pipe; the middle part of the core pipe is fixedly connected with a core pipe fixing wheel through a spline, the upper end surface of the core pipe fixing wheel is provided with a face gear, the face gear is respectively engaged with the pinion of the rear end of the four rotary cutting tool shafts, the core pipe fixing wheel does not rotate with the rotating arm and the rotary cutting mixing head, and the four rotary cutting tool shafts can respectively revolve around the axes thereof.

[0012] Preferably, the lower end of the core pipe communicates with the powder spraying port of the stirring shaft, and the inclined plate is sleeved on the core pipe without contacting the core pipe.

[0013] Preferably, the powder spraying machine and the storage device are arranged outside the excavator, the storage device stores the prepared solidifying agent and timely provides the solidifying agent for the powder spraying machine, and prevents the influence of moisture on the use of the solidifying agent; the powder spraying machine is connected with the core pipe through the material conveying pipe; the powder spraying machine sprays the solidifying agent into the core pipe through the material conveying pipe by means of an air compressor, and finally sprays the solidifying agent into the soil body through the rotary cutting mixing head.

[0014] Advantages

[0015] The technical scheme of the utility model obtains the following advantages:

[0016] 1. The three-dimensional structure is adopted for all-around mixing

[0017] Through the three-dimensional structure of the rotary cutting mixing head, the rotary cutting tool revolves with the stirring shaft and revolves itself, and the solidifying agent with pressure is sprayed into the soil body, so that the soil and the solidifying agent in the solidifying area are mixed all around.

[0018] 2. The replaceable rotating arm enhances the adaptability of the equipment to the environment

[0019] According to the construction environment, the equipment has rotating arms with different lengths, and is convenient and fast to install. DRAWINGS

[0020] Figure 1 It is a structural schematic view of the power head, the rotating arm and the rotary cutting mixing head of the utility model.

[0021] Figure 2 It is a structural schematic view of the power head of the utility model.

[0022] Figure 3 It is a structural schematic view of the rotary cutting mixing head of the utility model.

[0023] Figure 4 It is a schematic view of the engagement of the pinion and the core pipe fixing wheel of the utility model.

[0024] Figure 5 It is a whole schematic view of the riverbed in-situ solidification construction equipment for railway bridge pier scouring protection of the utility model Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 This utility model provides a technical solution: an in-situ riverbed solidification construction equipment for railway bridge pier scour protection, comprising a power head 1, a rotating arm 2, a rotary cutting and mixing head 3, a core tube 4, a conveying pipe 6, a powder spraying machine 7, a storage tank 8, and an excavator 9; wherein, the rotating arm connects the power head and the rotary cutting and mixing head, transmitting power from the power head to the rotary cutting and mixing head; the rotating arm has various lengths of 1m, 1.5m, 2m, and 3m, and can be customized and adjusted according to actual needs to adapt to different construction environment requirements; the core tube is arranged from top to bottom... At the center of the power head, rotating arm, and rotary cutting and mixing head, the core tube serves two purposes: firstly, it acts as a fixing rod connecting the power head, rotating arm, and rotary cutting and mixing head; secondly, it acts as a channel for the curing agent, transferring the curing agent to the rotary cutting and mixing head. The rotary cutting and mixing head performs all-round three-dimensional mixing of the soil, realizing in-situ solidification construction of the riverbed. The excavator carries the power head, rotating arm, and rotary cutting and mixing head, and provides driving force to the power head through its own hydraulic system, providing power for the in-situ solidification construction equipment. The excavator can move flexibly within the reinforcement area, ensuring that no dead corners are left in the reinforcement range.

[0027] The power head includes a power head housing 11, a hydraulic motor 12, a gear set 13, a drive shaft 14, and a speed change valve 15. The power head housing is the load-bearing component for the hydraulic motor, gear set, drive shaft, and speed change valve. The power head housing is connected to the excavator through connecting components.

[0028] The upper end face of the power head housing has two hydraulic motor mounting holes arranged side by side. Between the two hydraulic motor mounting holes, there is a core tube mounting hole and a drive shaft mounting hole. The core tube mounting hole and the drive shaft mounting hole are coaxial.

[0029] Two hydraulic motors are fixed to the hydraulic motor mounting holes on the upper end face of the power head housing by bolts. The output shaft of the hydraulic motor extends into the power head housing. The output shaft of the hydraulic motor is fixedly connected to the drive gear by a spline.

[0030] The driving shaft is a hollow columnar structure, the upper end of the driving shaft is installed in the driving shaft mounting hole through a bearing, the driving shaft can rotate freely, the middle part of the driving shaft is fixedly connected with a driven gear through a spline, the driven gear is engaged with the driving gears of the two hydraulic motors respectively, a gear set is formed, the gear set is located inside the power head shell, the hydraulic motors drive the driving shaft to rotate through the gear set; the two hydraulic motors drive the driving shaft together, which can effectively improve the load capacity; the lower end of the driving shaft is provided with an external spline;

[0031] The side surface of the power head shell is also provided with a speed change valve, the speed change valve controls the rotating speed of the hydraulic motor by changing the flow and pressure of the oil liquid from the hydraulic system of the excavator, thereby adjusting the rotating speed of the driving shaft to adapt to different mixing requirements;

[0032] The rotating arm is a hollow columnar structure, the upper end of the rotating arm is provided with an internal spline, the internal spline of the upper end of the rotating arm is engaged with the external spline of the lower end of the driving shaft, and the rotation of the driving shaft drives the rotating arm to rotate; the lower end of the rotating arm is provided with a lower flange;

[0033] The length of the rotating arm is 1m, 1.5m, 2m, 3m and the like, and can be customized according to actual needs to adapt to different construction environment requirements.

[0034] The rotary cutting mixing head 3 comprises a stirring shaft 31, a rotary cutting cutter shaft 32, a rotary cutting cutter 33 and a sharp head 34; the stirring shaft is a hollow columnar structure, the upper end of the stirring shaft is provided with an upper flange, the upper flange of the stirring shaft is fixedly connected with the lower flange of the rotating arm through bolts, and the stirring shaft can rotate together with the rotating arm; four rotary cutting cutter shaft mounting holes are evenly arranged on the circumference of the middle part of the stirring shaft, and bearing mounting seats are welded at the rotary cutting cutter shaft mounting holes; the middle parts of the four rotary cutting cutter shafts are respectively mounted in the bearing mounting seats at the four rotary cutting cutter shaft mounting holes of the stirring shaft through bearings, and the four rotary cutting cutter shafts can revolve together with the stirring shaft; a plurality of rotary cutting cutters are welded on the circumference of the front part of the rotary cutting cutter shaft, the rotary cutting cutters are arranged in a spiral shape, and the rotary cutting cutters revolve together with the rotary cutting cutter shaft; a small gear 35 is also fixedly installed at the rear end of the rotary cutting cutter shaft.

[0035] In the rotary cutting mixing head 3, 6-8 rotary cutting cutters 33 are welded on the circumference of the front part of the rotary cutting cutter shaft 32, the rotary cutting cutters are made of high-carbon steel (hardness HRC 55-60), the helix angle is 30°, and the rotary cutting cutters are arranged at intervals of 15cm along the axial direction of the cutter shaft. Through test effect, when the rotary cutting cutter shaft 32 rotates at a speed of 80rpm in a clay riverbed, the soil shear force can reach 120kPa, which ensures the crushing effect of deep soil. Of course, other structures of rotary cutting mixing heads can be used, which are not limited herein.

[0036] The lower part of the stirring shaft is provided with a powder injection port 36, and an inclined plate 37 is fixedly arranged at the powder injection port. The arrangement of the inclined plate can effectively block the solidifying agent sprayed from the core pipe end, so that the solidifying agent is discharged from the powder injection port.

[0037] The stirring shaft end is also provided with a pointed head 34 which rotates with the stirring shaft and stirs the soil;

[0038] The core pipe 4 passes through the power head shell, the driving shaft, the rotating arm and the stirring shaft from top to bottom and is located at the center position, wherein the upper part of the core pipe is fixedly connected with the power head shell and a section of interface is reserved at the upper end for butt joint with the material conveying pipe 6; the middle part of the core pipe is fixedly connected with the core pipe fixing wheel 41 through the spline, the upper end surface of the core pipe fixing wheel is provided with a face gear which is engaged with the pinion at the rear end of the four rotary cutting blade shafts respectively, and the core pipe fixing wheel does not rotate with the rotating arm and the rotary cutting mixing head; when the stirring shaft rotates, the rotary cutting blade shaft revolves with the stirring shaft and simultaneously drives the pinion to engage with the fixed face gear to drive the rotary cutting blade shaft to rotate; the revolution and rotation of the rotary cutting blade shaft drive the rotary cutting blade to revolve and rotate, and the revolution and rotation of the rotary cutting blade and the rotation of the pointed head realize the three-dimensional and omnidirectional stirring of the soil;

[0039] The lower end of the core pipe communicates with the powder spraying hole of the stirring shaft, and the inclined plate is sleeved on the core pipe without contacting the core pipe; after the curing agent is sprayed out of the core pipe, it is sprayed out of the powder spraying hole under the blocking action of the inclined plate and is sprayed with the stirring shaft, and under the stirring of the rotary cutting mixing head, the curing agent can be more fully and uniformly mixed with the soil to achieve good curing.

[0040] The powder spraying machine and the material storage device are arranged outside the excavator, the material storage device stores the prepared curing agent to provide the curing agent for the powder spraying machine in time and prevent the water from affecting the use of the curing agent; the powder spraying machine is connected with the core pipe through the material conveying pipe; the powder spraying machine sprays the curing agent into the core pipe through the material conveying pipe by using the air compressor, and finally sprays the curing agent into the soil through the rotary cutting mixing head.

[0041] In summary, when the railway riverbed scouring resistance in-situ curing construction equipment is used, the prepared curing agent is first loaded into the material storage device, the curing agent is input into the core pipe through the material conveying pipe by the air compressor in the powder spraying machine; the rotating arm connects the power head and the rotary cutting mixing head to drive the rotary cutting mixing head to rotate and transmit the power of the power head to the rotary cutting mixing head; the core pipe in the power head, the rotating arm and the rotary cutting mixing head serves as a powder spraying channel to transmit the curing agent to the rotary cutting mixing head; the excavator is loaded with the power head, the rotating arm and the rotary cutting mixing head and provides driving force for the power head through the hydraulic system of the excavator to provide power for the in-situ curing construction; the hydraulic system of the excavator drives the hydraulic motor to rotate the driving shaft through the gear box, the driving shaft drives the rotating arm to rotate, and the rotating arm drives the rotary cutting mixing head to stir the soil in three dimensions and omnidirectionally; the excavator can move flexibly in the reinforced area to ensure that there is no dead angle in the reinforced area.

[0042] The content not described in detail in the specification belongs to the prior art known to those skilled in the art. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A riverbed in-situ solidification construction equipment for railway pier scour protection, comprising a power head, a rotating arm, a rotary cutting mixing head, a core pipe, a material conveying pipe, a powder spraying machine, a material storage device and an excavator, characterized in that: The power head drives the main shaft to rotate through the hydraulic motor; the upper end of the rotating arm is in meshing transmission with the main shaft of the power head through the spline; the rotary cutting and mixing head is fixedly connected with the lower end of the rotating arm through the stirring shaft; the core pipe penetrates the center of the power head, the rotating arm and the rotary cutting and mixing head, and the upper end is connected with the material conveying pipe; the powder spraying machine injects the solidifying agent into the core pipe through the material conveying pipe; the excavator provides hydraulic power.

2. The in-situ riverbed solidification construction equipment for railway pier scour protection according to claim 1, characterized in that, The power head comprises: a power head shell connected with the excavator through a connecting member; two hydraulic motors fixedly connected with driving gears through splines; a driving shaft installed in the power head shell through a bearing, and a driven gear fixedly connected with the middle part of the driving shaft through a spline and in meshing transmission with the driving gears of the hydraulic motors; and a speed change valve arranged on the side surface of the power head shell.

3. The in-situ riverbed solidification construction equipment for railway pier scour protection according to claim 2, characterized in that: The driving shaft is in a hollow columnar structure, the upper end of the driving shaft is fixedly connected with the power head shell through a bearing, the middle part of the driving shaft is fixedly connected with the driven gear through a spline, the driven gear is in meshing transmission with the driving gears of the two hydraulic motors respectively, and a gear set is formed, the gear set is located in the power head shell, the hydraulic motors drive the driving shaft to rotate through the gear set, and the lower end of the driving shaft is further provided with an external spline.

4. A riverbed in-situ solidification construction equipment for railway pier scour protection according to claim 2, characterized in that: The side surface of the power head shell is further provided with a speed change valve.

5. A riverbed in-situ solidification construction equipment for railway pier scour protection according to claim 2, characterized in that: The rotating arm is in a hollow columnar structure, the upper end of the rotating arm is provided with an internal spline, the internal spline of the upper end of the rotating arm is in meshing transmission with the external spline of the lower end of the driving shaft, and the rotation of the driving shaft drives the rotating arm to rotate; and the lower end of the rotating arm is provided with a lower flange.

6. A riverbed in-situ solidification construction equipment for railway pier scour protection according to claim 2, characterized in that: The rotary cutting and mixing head comprises a stirring shaft, rotary cutting shafts and rotary cutters; the stirring shaft is in a hollow columnar structure, the upper end of the stirring shaft is provided with an upper flange, the upper flange of the stirring shaft is fixedly connected with the lower flange of the rotating arm through bolts, and the stirring shaft rotates together with the rotating arm; four rotary cutting shafts are uniformly installed on the middle part of the stirring shaft along the circumference, a plurality of rotary cutters are welded on the front part of the rotary cutting shaft along the circumference, the rotary cutters are arranged in a spiral shape, four groups of rotary cutters revolve together with the stirring shaft; and a pinion is further fixedly installed on the rear end of the rotary cutting shaft.

7. A riverbed in-situ solidification construction equipment for railway pier scour protection according to claim 6, characterized in that: The lower part of the stirring shaft is provided with a powder spraying port, and an inclined plate is fixedly arranged above the powder spraying port; and a sharp head is arranged at the tail end of the stirring shaft.

8. A riverbed in-situ solidification construction equipment for railway pier scour protection according to claim 1, characterized in that: The core pipe penetrates the power head shell, the driving shaft, the rotating arm and the stirring shaft from top to bottom and is located at the center position, the upper part of the core pipe is fixedly connected with the power head shell, and a section of interface is reserved at the upper end of the core pipe and is connected with the material conveying pipe; the middle part of the core pipe is fixedly connected with a core pipe fixing wheel through a spline, the upper end surface of the core pipe fixing wheel is provided with a face gear, the face gear is in meshing transmission with the pinions at the rear ends of the four rotary cutting shafts respectively, the core pipe fixing wheel does not rotate together with the rotating arm and the rotary cutting and mixing head, and the four rotary cutting shafts revolve around their own axes respectively.

9. A riverbed in-situ solidification construction equipment for railway pier scour protection according to claim 8, characterized in that: The lower end of the core pipe communicates with the powder spraying port of the stirring shaft, and the inclined plate is sleeved on the core pipe and does not contact the core pipe.

10. A riverbed in-situ solidification construction equipment for railway pier scour protection according to claim 1, characterized in that: The powder spraying machine and the material storage device are arranged outside the excavator, the material storage device stores the prepared solidifying agent and provides the solidifying agent to the powder spraying machine in time; the powder spraying machine is connected with the core pipe through the material conveying pipe; the powder spraying machine sprays the solidifying agent into the core pipe through the material conveying pipe by using the air compressor, and finally sprays the solidifying agent into the soil through the rotary cutting and mixing head.

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