Small-scale slope device and construction method of pipe culvert foundation with chamfer

Abstract

The application relates to the field of highway engineering construction, and discloses a small-scale benching device and a construction method of a pipe culvert foundation with chamfered corners. Since the milling surface of the moving base running track is parallel to the slope surface, the milling wheel is relatively static with the moving base after the milling wheel is adjusted to the design height through the lifting arm, so that the working surface of the milling wheel is parallel to the slope to be constructed, and the purpose of accurate benching is achieved after layer-by-layer milling. Compared with manual or excavator benching, the method reduces the excavation of the area below the slope to be constructed, improves the benching precision, and thus avoids the backfilling of the soil layer in the later period. The areas corresponding to the chamfered corners on both sides of the pipe culvert foundation bottom are benching, the method of pouring concrete chamfer once after benching is adopted, the problems that the conventional chamfer processing has large engineering quantity and low efficiency and the backfilled soil is difficult to tamp after the conventional chamfer processing is completed are solved, and the purposes of shortening the construction period and improving the foundation quality are achieved.

Description

Technical Field

[0001] This invention relates to the field of highway engineering construction, specifically to a small slope protection device and a construction method for a culvert foundation with chamfered corners. Background Technology

[0002] When concrete foundations bear loads, stress concentration can easily occur at right angles, leading to problems such as cracking and deformation. Therefore, chamfering is necessary during construction to effectively mitigate this stress concentration, enhance the seismic resistance and stability of the concrete foundation, and extend its service life. Currently, common methods for chamfering concrete foundations involve using manual chamfering machines, electric chamfering machines, or cutting machines. These tools are placed at the edge of the concrete foundation and operated back and forth along the edge to gradually process the corner. However, this method is only suitable for small chamfers.

[0003] In current road construction, if chamfering is applied to the foundations of culverts spanning the road surface, the aforementioned chamfering method results in a large workload, low construction efficiency, and delays in the construction period. Furthermore, after chamfering the culvert foundation, the backfill soil beneath the chamfer is difficult to backfill and compact, leading to subsequent backfill settlement. This results in a lack of support under the culvert, ultimately causing cracking of the culvert foundation. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, a small-scale slope protection device and a construction method for chamfered culvert foundations are provided, which achieve the chamfering effect while avoiding the problem of difficult backfilling.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A small slope-clearing device, characterized in that: it includes

[0007] Track supports are installed on the higher and lower planes on both sides of the slope area to be excavated, and are spaced apart on the two planes along the length of the area to be constructed.

[0008] The system consists of longitudinal and transverse tracks. The two longitudinal tracks are respectively laid on track supports on the higher and lower planes, and the two longitudinal tracks are parallel and horizontal. The two ends of the transverse track are slidably connected between the two longitudinal tracks, and the connection position of the transverse track with the longitudinal track is adjusted according to the changes in the construction area.

[0009] A mobile base is mounted on a transverse track in an adjustable manner. A boom and a functional head assembly are mounted on the mobile base. One end of the boom is fixed to the mobile base, and the other end of the boom is detachably mounted on the functional head assembly. The functional head assembly includes a milling wheel and a bucket.

[0010] The control console and the positioner are located near the construction area. The control console is electrically connected to the transverse track, the moving base, and the positioner. The positioner is located on the moving base, and the controller controls the movement of the moving base in the plane.

[0011] According to the above technical solution, the functional head assembly also includes a pressure roller.

[0012] According to the above technical solution, the longitudinal track is composed of multiple segments of the same length. Adjacent segments of the same length are connected by bolts. The number of segments is determined according to the actual conditions of the construction site.

[0013] According to the above technical solution, the track support adopts a telescopic support, and matching clamping plates and slots are provided on the top of the track support and the lower surface of the longitudinal track segment. The track support and the longitudinal track are detachably connected through the clamping plates and slots; and a horizontal bubble meter is provided on each segment of the longitudinal track.

[0014] According to the above technical solution, the transverse track is connected to the longitudinal track through a groove structure, and an electric pulley is installed in the connecting groove between the transverse track and the longitudinal track. The control console drives the transverse guide rail to move on the longitudinal guide rail by controlling the electric pulley. The movable base is connected to the longitudinal track through a groove structure, and an electric pulley is installed in the connecting groove between the movable base and the longitudinal track.

[0015] According to the above technical solution, the boom is composed of multiple short boom sections connected together. Each short boom section rotates vertically around the boom connection point to flexibly adjust the position of the milling wheel or pressure wheel.

[0016] A construction method for a culvert foundation with chamfered corners, characterized by the following steps:

[0017] S1: Divide the culvert foundation design and placement area into an excavation equipment construction area and a slope protection equipment construction area;

[0018] S2: Excavation work is carried out in the excavation equipment construction area using excavators or manual digging;

[0019] S3: Use small slope protection devices to operate in the slope protection equipment construction area;

[0020] S4: Lay the culvert foundation formwork and pour the concrete.

[0021] According to the above technical solution, in step S1: the construction area of ​​the excavation equipment is the area above the highest point of the chamfer of the culvert foundation and the area above the horizontal line of the bottom edge of the culvert foundation;

[0022] The construction area for the slope protection equipment is the area directly above the chamfer of the culvert foundation and below the highest point of the chamfer.

[0023] According to the above technical solution, the specific steps in step S2 are as follows;

[0024] S31: Install slope protection devices and divide the slope protection equipment construction area into multiple layers according to the size of the milling wheel;

[0025] S32: Use a milling wheel to mill the entire upper construction area;

[0026] S33: Replace the milling wheel with a bucket and clean the milled soil in this layer area;

[0027] S34: Repeat steps S32 and S33 until the soil layer above the designed slope is cleared;

[0028] S35: Replace the bucket with a pressure roller, use the pressure roller to compact and smooth the milled slope, and disassemble the equipment.

[0029] According to the above technical solution, in step S32, the milling wheel working surface is parallel to the design surface of the slope to be constructed; in step S35, the bucket angle is adjusted to be parallel to the slope surface and fixed.

[0030] The present invention has the following beneficial effects:

[0031] 1. By adjusting the height of the two longitudinal rails via the track supports, the inclination angle of the transverse rail is adjusted to match the slope of the slope to be constructed, thus ensuring that the running plane of the mobile base is parallel to the slope plane. Depending on the size of the slope, the area to be constructed is divided into layers. The distance between the milling wheel and the mobile base is adjusted using the boom. Then, the control console moves the transverse guide rail on the longitudinal guide rail and the mobile base on the transverse guide rail, thereby milling the soil layer in that area. After milling the soil layer, the milling cutter is replaced with a bucket to clean up the milled soil. The above process is then repeated for the next layer.

[0032] Based on the above measures, since the milling surface of the mobile base's running trajectory is parallel to the slope surface, and the milling wheel is relatively stationary with the mobile base after being adjusted to the design height by the boom, the working surface of the milling wheel is parallel to the slope to be constructed. This allows for precise slope setting through layer-by-layer milling. Furthermore, compared to manual or excavator-based slope setting, it reduces excavation below the slope to be constructed, improving slope accuracy and avoiding the need for subsequent backfilling. Finally, the use of track laying and on-site assembly technology solves the problems of traditional large machinery being difficult to access, and the construction location changing frequently after arrival, making it difficult to determine the construction point. This achieves the goal of a wider construction range and greater construction convenience.

[0033] 2. The functional head assembly also includes a pressure roller. After the soil layer above the designed slope is milled and cleaned, the pressure roller is used to flatten the slope surface, thereby improving the quality and accuracy of the slope.

[0034] 3. The areas corresponding to the chamfers on both sides of the bottom of the culvert foundation are sloped. The method of directly pouring concrete to form the chamfer in one step after sloping is adopted. This solves the problems of large workload and low efficiency of conventional chamfering and the difficulty in compacting the backfill soil after conventional chamfering. It achieves the purpose of shortening the construction period and improving the foundation quality. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of an embodiment provided by the present invention;

[0036] Figure 2 This is a usage state diagram of an embodiment provided by the present invention;

[0037] Figure 3 This is a diagram showing the connection relationship between two adjacent sections of the longitudinal guide rail provided in an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure between the milling wheel, the boom, and the movable base provided in an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the connection point between the short booms provided in an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the pressure roller provided in an embodiment of the present invention;

[0041] Figure 7 This is a schematic diagram of the structure of the milling wheel provided in an embodiment of the present invention;

[0042] Figure 8 This is a schematic diagram of the bucket structure provided in an embodiment of the present invention;

[0043] Figure 9 This invention provides an embodiment of the construction process for a chamfered culvert foundation. Figure 1 ;

[0044] Figure 10 This invention provides an embodiment of the construction process for a chamfered culvert foundation. Figure 2 ;

[0045] Figure 11 This invention provides an embodiment of the construction process for a chamfered culvert foundation. Figure 3 ;

[0046] Figure 12 This invention provides an embodiment of the construction process for a chamfered culvert foundation. Figure 4 ;

[0047] In the diagram, 1. Track support; 2. Longitudinal track; 3. Transverse track; 4. Movable base; 5. Boom; 5-1. Connector; 6. Milling wheel; 7. Bucket; 8. Control console; 9. Positioner; 10. Pressure roller; 11. Excavation equipment construction area; 12. Slope protection equipment construction area 1. Detailed Implementation

[0048] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] Reference Figures 1-8 As shown, the present invention provides a small slope protection device.

[0050] Example 1

[0051] include

[0052] Track support 1, the track support is set on the higher plane and the lower plane on both sides of the slope area to be excavated, and is arranged at intervals on the two planes along the length of the area to be constructed.

[0053] Longitudinal track 2 and transverse track 3 are provided. The two longitudinal tracks are respectively laid on track supports on the higher plane and the lower plane, and the two longitudinal tracks are parallel and horizontal. The two ends of the transverse track are slidably connected between the two longitudinal tracks. The connection position of the transverse track with the longitudinal track is adjusted according to the changes in the construction area.

[0054] The mobile base 4 is mounted on the transverse track in an adjustable manner. The mobile base is equipped with a boom 5 and a functional head assembly. One end of the boom is fixed to the mobile base, and the other end of the boom is detachably equipped with the functional head assembly. The functional head assembly includes a milling wheel 6 and a bucket 7. The boom is connected to the functional head through a connector 5-1.

[0055] The system includes a control console (8) and a positioner (9). The control console is located near the construction area and is electrically connected to the transverse track, the mobile base, and the positioner. The positioner is located on the mobile base, and the controller controls the movement of the mobile base within the plane. The operation of the functional head and boom can be manually controlled by the operator or connected to the control console for automatic control.

[0056] In this embodiment, the height of the two longitudinal rails is adjusted by the track supports to adjust the tilt angle of the transverse rail, ensuring that the tilt angle of the transverse rail matches the slope of the slope to be constructed. This guarantees that the running plane of the mobile base is parallel to the slope plane. Based on the size of the slope, the area to be constructed is divided into layers. The distance between the milling wheel and the mobile base is adjusted by the boom. Then, the control console moves the transverse guide rail on the longitudinal guide rail and the mobile base on the transverse guide rail, thereby milling the soil layer in that area. After milling the soil layer, the milling cutter is replaced with a bucket to clean up the milled soil. The above process is then repeated for the next layer.

[0057] Based on the above measures, since the milling surface of the mobile base's running trajectory is parallel to the slope surface, and the milling wheel is relatively stationary with the mobile base after being adjusted to the design height by the boom, the working surface of the milling wheel is parallel to the slope to be constructed. This allows for precise slope setting through layer-by-layer milling. Furthermore, compared to manual or excavator-based slope setting, it reduces excavation below the slope to be constructed, improving slope accuracy and avoiding the need for subsequent backfilling. Finally, the use of track laying and on-site assembly technology solves the problems of traditional large machinery being difficult to access, and the construction location changing frequently after arrival, making it difficult to determine the construction point. This achieves the goal of a wider construction range and greater construction convenience.

[0058] Example 2

[0059] The structure and principle of Example 2 are similar to those of Example 1, except that: in order to improve the quality and accuracy of the slope, the functional head assembly also includes a pressure roller 10, which is used to flatten the slope surface after the soil layer above the designed slope is milled and cleaned.

[0060] In Embodiments 1 and 2, preferably, the longitudinal track is composed of multiple segments of the same length, with adjacent segments of the same length connected by bolts. The number of rotating segments is determined according to the actual conditions of the construction site. Of course, a longitudinal guide rail that is configured as a single unit is also within the scope of protection of this invention.

[0061] In Embodiments 1 and 2, preferably, the track support is a telescopic support, with matching clamping plates and slots on the top of the track support and the lower surface of the longitudinal track segment, so that the track support and the longitudinal track can be detachably connected; and a horizontal bubble meter is provided on each segment of the longitudinal track.

[0062] In this embodiment, by adjusting the height of the telescopic track support in conjunction with a level bubble level, the two longitudinal guide rails are adjusted to a horizontal state; the track support located on the upper plane and the track support located on the lower plane are arranged in multiple rows, with equal spacing between each row of track supports, thus ensuring the parallel arrangement of the two longitudinal tracks.

[0063] In embodiments 1 and 2, preferably, the transverse track is connected to the longitudinal track via a groove structure, and an electric pulley is installed in the connecting groove between the transverse and longitudinal tracks. The control console drives the transverse guide rail to move on the longitudinal guide rail by controlling the electric pulley. The movable base is connected to the longitudinal track via a groove structure, and an electric pulley is installed in the connecting groove between the movable base and the longitudinal track. In this embodiment, the linear moving structure of "electric pulley + groove structure" is a common existing structure.

[0064] Example 3

[0065] The structure and principle of Example 3 are similar to those of Examples 1 and 2, except that: Figure 5 As shown, the boom is composed of multiple short boom sections connected together. Each short boom section rotates vertically around the boom connection point to flexibly adjust the position of the milling wheel or pressure wheel.

[0066] A telescopic boom can also be used, which is fixed to the bottom of the mobile base and is perpendicular to the running trajectory plane of the mobile base. The functional head assembly is installed at the other end of the telescopic boom in a detachable connection manner. The telescopic boom can be made of hydraulic cylinder or pneumatic cylinder.

[0067] like Figures 9-12 As shown, the present invention also provides a construction method for a culvert foundation with chamfered corners, comprising the following steps:

[0068] S1: Divide the culvert foundation design and placement area into excavation equipment construction area 11 and slope protection equipment construction area 12;

[0069] S2: Excavation work is carried out in the excavation equipment construction area using excavators or manual digging;

[0070] S3: Use small slope protection devices to operate in the slope protection equipment construction area;

[0071] S4: Lay the culvert foundation formwork and pour the concrete.

[0072] In this embodiment, the areas corresponding to the chamfers on both sides of the bottom of the culvert foundation are sloped, and concrete is poured directly after sloping to form the chamfer in one step. This solves the problems of large workload and low efficiency in conventional chamfering, and the difficulty in compacting the backfill soil after conventional chamfering. This achieves the goal of shortening the construction period and improving the foundation quality.

[0073] In the above embodiment, preferably, in step S1: the excavation equipment construction area is the area above the highest point of the chamfer of the culvert foundation and the area above the horizontal line of the bottom edge of the culvert foundation; the slope protection equipment construction area is the area directly above the chamfer of the culvert foundation and below the highest point of the chamfer. Alternatively, the area farther away from the slope in the above-mentioned slope protection equipment construction area can be excavated using excavation equipment (as shown in Figures 9-12).

[0074] In the above embodiment, the specific steps in step S2 are as follows;

[0075] S31: Install slope protection devices and divide the slope protection equipment construction area into multiple layers according to the size of the milling wheel;

[0076] S32: Use a milling wheel to mill the entire upper construction area;

[0077] S33: Replace the milling wheel with a bucket and clean the milled soil in this layer area;

[0078] S34: Repeat steps S32 and S33 until the soil layer above the designed slope is cleared;

[0079] S35: Replace the bucket with a pressure roller, use the pressure roller to compact and smooth the milled slope, and disassemble the equipment.

[0080] In the above embodiment, in step S32, the milling wheel working surface is parallel to the design surface of the slope to be constructed; in step S35, the bucket angle is adjusted to be parallel to the slope surface and fixed.

[0081] The working process of this invention:

[0082] 1) Before the track is installed, use an excavator to excavate the earthwork and carry out foundation treatment. When excavating, first excavate to the starting height of the slope (the area above the highest point of the chamfer of the culvert foundation), and then excavate the middle part where no slope is needed (i.e., the area above the horizontal line of the bottom edge of the culvert foundation).

[0083] 2) After the excavator operation is completed, the rails are installed. Rail supports are installed according to the actual site conditions. First, longitudinal rails are installed on both sides of the designed culvert slope. The longitudinal rails are placed on the rail supports and connected to them with bolts. Then, a transverse rail is installed between the longitudinal rails, placed on top of the longitudinal rails. The transverse rail is connected to the longitudinal rails through a trough structure. Electric pulleys are installed in the transverse rail connection groove to allow the transverse rail to move along the longitudinal rail direction. Longitudinal rails can be added in the middle of the transverse rails for support, depending on the specific situation.

[0084] 3) After the track is installed, the movable base is installed on the transverse track. The movable base is connected to the longitudinal track through a groove structure. The movable base is equipped with electric pulleys in the connecting groove, which allows the movable base to move along the transverse track. The milling wheel is installed at the end of the boom of the movable base through a connector.

[0085] 4) After the milling wheel is installed, use a locator to position the milling wheel (the locator positions the moving base and determines the extension length of the boom). Transmit the positioning result to the control console, and then set the milling wheel milling route through the control console to start milling the slope. The working surface of the milling wheel is parallel to the design surface of the slope to be constructed, and milling is carried out layer by layer from the construction end.

[0086] 5) After milling to the designed position, remove the milling wheel, replace it with a bucket, adjust the angle of the bucket to be parallel to the slope and fix it, remove the soil and rocks milled from the slope, and clean the slope.

[0087] 6) After cleaning the soil layer above the designed slope, remove the bucket and replace it with a roller. Adjust the angle of the roller to be parallel to the slope and fix it. Use the positioning system to position the roller. After positioning, set the roller route through the control center and use the roller to compact and smooth the milled slope.

[0088] 7) After the slope treatment is completed, dismantle the equipment and track, clean the foundation, install the formwork and start concrete pouring, and carry out subsequent construction according to the plan.

[0089] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A construction method for a culvert foundation with chamfered corners, characterized in that: A small-scale slope protection device is adopted, which includes: Track supports are installed on the higher and lower planes on both sides of the slope area to be excavated, and are spaced apart on the two planes along the length of the area to be constructed. The system consists of longitudinal and transverse tracks. The two longitudinal tracks are respectively laid on track supports on the higher and lower planes, and the two longitudinal tracks are parallel and horizontal. The two ends of the transverse track are slidably connected between the two longitudinal tracks, and the connection position of the transverse track with the longitudinal track is adjusted according to the changes in the construction area. A mobile base is mounted on a transverse track in an adjustable manner. A boom and a functional head assembly are mounted on the mobile base. One end of the boom is fixed to the mobile base, and the other end of the boom is detachably mounted on the functional head assembly. The functional head assembly includes a milling wheel and a bucket. The control console and the positioner are located near the construction area. The control console is electrically connected to the transverse track, the mobile base, and the positioner. The positioner is located on the mobile base, and the controller controls the movement of the mobile base in the plane. The construction method includes the following steps: S1: Divide the culvert foundation design and placement area into an excavation equipment construction area and a slope protection equipment construction area; S2: Excavation work is carried out in the excavation equipment construction area using excavators or manual digging; The specific steps in step S2 are as follows; S31: Install slope protection devices and divide the slope protection equipment construction area into multiple layers according to the size of the milling wheel; S32: Use a milling wheel to mill the entire upper construction area; S33: Replace the milling wheel with a bucket to clean the milled soil in the upper construction area; S34: Repeat steps S32 and S33 until the soil layer above the designed slope is cleared; S35: Replace the bucket with a pressure roller, use the pressure roller to compact and smooth the milled slope, then disassemble the equipment. S3: Use small slope protection devices to operate in the slope protection equipment construction area; S4: Lay the culvert foundation formwork and pour the concrete.

2. The construction method for a chamfered culvert foundation according to claim 1, characterized in that: In step S1: the construction area of ​​the excavation equipment is the area above the highest point of the chamfer of the culvert foundation and the area above the horizontal line of the bottom edge of the culvert foundation; The construction area for the slope protection equipment is the area directly above the chamfer of the culvert foundation and below the highest point of the chamfer.

3. The construction method for a chamfered culvert foundation according to claim 1, characterized in that: In step S32, the milling wheel working surface is parallel to the design surface of the slope to be constructed; in step S35, the bucket angle is adjusted to be parallel to the slope surface and fixed.

4. The construction method for a chamfered culvert foundation according to claim 1, characterized in that: The functional head assembly also includes a pressure roller.

5. The construction method for a chamfered culvert foundation according to claim 1, characterized in that: The longitudinal track is composed of multiple segments of the same length. Adjacent segments of the same length are connected by bolts. The number of segments is determined according to the actual conditions of the construction site.

6. The construction method for a chamfered culvert foundation according to claim 5, characterized in that: Matching clamps and slots are provided on the top of the track support and the lower surface of the longitudinal track segment, enabling a detachable connection between the track support and the longitudinal track; and a horizontal bubble meter is provided on each segment of the longitudinal track.

7. The construction method for a chamfered culvert foundation according to claim 1, characterized in that: The transverse track is connected to the longitudinal track via a groove structure. The groove connecting the transverse and longitudinal tracks is equipped with electric pulleys. The control console drives the transverse guide rail to move on the longitudinal guide rail by controlling the electric pulleys. The movable base is connected to the longitudinal track via a groove structure. The groove connecting the movable base and the longitudinal track is equipped with electric pulleys.

8. The construction method for a chamfered culvert foundation according to claim 1, characterized in that: The boom is composed of multiple short boom sections connected together. Each short boom section rotates vertically around the boom connection point to flexibly adjust the position of the milling wheel or pressure wheel.

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