CN112359883A

CN112359883A - Geotechnical coiled material laying equipment

Info

Publication number: CN112359883A
Application number: CN202011279868.1A
Authority: CN
Inventors: 谢世平; 张健; 何顺辉
Original assignee: Tianjin Zhongliangelin Science & Technology Development Co ltd
Current assignee: Tianjin Zhongliangelin Science & Technology Development Co ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-02-12
Anticipated expiration: 2040-11-16
Also published as: CN112359883B

Abstract

The invention relates to the technical field of coiled material laying, and discloses a geotechnical coiled material laying device which comprises a laying main body, a plurality of sets of mobile devices and an energy supply assembly, wherein the mobile devices are arranged on the laying main body in a sliding manner and are used for driving the laying main body to move, and the energy supply assembly supplies energy to the laying main body and components in the mobile devices; two sets of operation arm components are symmetrically hinged to two sides of the connecting outer sleeve, each operation arm component comprises a bearing wheel frame, a bicycle group and a first telescopic portion, the bicycle group is connected to one end portion of the bearing wheel frame, the other end portion of the bearing wheel frame is hinged to the connecting outer sleeve, and the first telescopic portion is hinged to the bearing wheel frame and the connecting outer sleeve. The mobile device can drive the laying main body to move for assistance of reducing manpower, and in addition, the angle between the bearing wheel carrier in the mobile device and the ground can be adjusted, so that the device can be ensured to have a proper vehicle body posture to prevent the device from being overturned when the device is positioned on an operation surface with a slope for construction.

Description

Geotechnical coiled material laying equipment

Technical Field

The invention relates to the technical field of coiled material laying, in particular to a geotechnical coiled material laying device.

Background

At present, the application of the geotechnical material relates to a plurality of fields, for example, the application of the geotechnical material in the in-situ covering treatment of polluted bottom mud, the covering thickness can be reduced and the covering uniformity can be improved by paving the special geotechnical material, and meanwhile, the covering treatment effect can be greatly improved by utilizing the isolation, reinforcement, reverse filtration and drainage performance of the geotechnical material. At present, various high-performance geotechnical materials widely applied are sold in the form of geotechnical coiled materials, such as geotechnical cloth, a geotechnical membrane, a drainage net, a waterproof blanket and the like, and the geotechnical coiled materials need to be unfolded and paved on a construction working surface when in use.

At present, domestic geotechnical coiled material lays the installation and still is the manpower construction as the main, can use some simple fixed construction machinery to lay the operation under the partial scene, but it is not convenient for remove, because it removes the inconvenient problem that has caused the efficiency of construction low, and need a large amount of manpower assistance to have great potential safety hazard in the work progress, and equipment poor stability when having the operation face of slope to lay the operation again in addition.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the geotechnical coiled material laying equipment which can move automatically, does not need a large amount of manual assistance in the construction process, and has high efficiency and low potential safety hazard.

In order to achieve the above purpose, the invention provides the following technical scheme:

the geotechnical coiled material laying equipment comprises a laying main body, a plurality of groups of mobile equipment and an energy supply assembly, wherein the mobile equipment is arranged on the laying main body in a sliding mode and is used for driving the laying main body to move, and the energy supply assembly drives a driving part in the laying main body and the mobile equipment to stretch or rotate;

the mobile equipment comprises a connecting outer sleeve and two groups of operating support arm assemblies, wherein the operating support arm assemblies are symmetrically hinged to two sides of the connecting outer sleeve, each operating support arm assembly comprises a bearing wheel carrier, a self-wheel set and a first telescopic portion, the self-wheel set is connected to one end portion of the bearing wheel carrier, the other end portion of the bearing wheel carrier is hinged to the connecting outer sleeve, the first telescopic portion is connected between the bearing wheel carrier and the connecting outer sleeve, and the included angle between the bearing wheel carrier and the ground is changed through the stretching of the length of the first telescopic portion. The mobile equipment can drive the laying main body to move, simultaneously can reduce the assistance of manpower, and in addition, the angle between a bearing wheel carrier in the mobile equipment and the ground can be adjusted through the first telescopic part, so that the included angle between each group of operation support arm assemblies and the ground can be adjusted to ensure that the device has a proper vehicle body posture to prevent the device from turning over when the device is used for laying facilities on an operation surface with slope.

In the invention, further, an angle modulation inner sleeve is rotatably arranged in the connecting outer sleeve in a penetrating manner, an angle modulation gear ring is fixedly arranged on one side end face of the angle modulation inner sleeve, a first driving unit is fixedly arranged on the connecting outer sleeve, and a driving gear on the first driving unit is meshed with the angle modulation gear ring. The angle modulation inner sleeve can rotate in the connecting outer sleeve through the driving of the first driving unit, and the bearing cross arm can also rotate when the adjusting inner sleeve rotates around the axis of the connecting outer sleeve due to the fact that the angle modulation inner sleeve is sleeved on the bearing cross arm in a sliding mode, so that the inclination angle of the laying main body can be changed, the position of the gravity center of the laying equipment can be adjusted, and the running stability of the laying equipment in a scene with slopes can be further improved.

In the invention, the laying main body further comprises a force-bearing cross arm, side connecting arms and a rotating shaft assembly, wherein the two groups of side connecting arms are vertically fixed at two side ends of the force-bearing cross arm, and the rotating shaft assembly is rotatably connected between the two groups of side connecting arms. The structure is not provided with a power unit, and the manufacturing cost is low.

In the invention, further, a power unit is fixedly arranged on the laying main body, the power unit comprises a second driving unit and a transmission assembly, and an output end of the second driving unit is connected with the rotating shaft assembly through the transmission assembly. The rotation condition of the rotating shaft assembly can be controlled through the power unit, and the geotextile coiled material fixed on the supporting shaft body can be conveniently folded and unfolded.

In the invention, further, the side connecting arm and the force-bearing cross arm are made of I-shaped steel, and the transmission assembly is positioned in a groove at one side of the side connecting arm away from the force-bearing cross arm. This structure setting has utilized the side linking arm to be the structural style of I-steel, and this structure provides the protection for drive assembly, prevents the destruction of exogenic force to drive assembly in the work progress to because the holistic quality of I-steel can alleviate the dead weight of whole equipment.

In the invention, further, a transverse sliding rail and a second telescopic part are fixedly arranged in a groove of the bearing cross arm, the second telescopic part drives a sliding block to displace on the transverse sliding rail, and the sliding block is fixedly connected with the inner side wall of the angle adjusting inner sleeve. The transverse moving slide rail and the second telescopic part can drive the mobile equipment to move along the length extending direction of the bearing cross arm, so that obstacles in a traveling path can be avoided, and the passing performance is improved.

In the invention, a third telescopic part is further connected between the bearing wheel frame and the bicycle wheel set. The third telescopic part can adjust the height of the laying device and also can adjust the distance between the laying main body and the ground.

In the invention, further, a first energy supply unit and a first control unit are fixedly arranged on the connection jacket, and the first energy supply unit, the first control unit and the first driving unit are electrically connected. Can be used for adjusting each subassembly integration of the device of laying the main part inclination on connecting the overcoat through this setting, need too much walk the line and cause winding problem easily when can avoiding being connected with outside energy supply and control assembly.

In the invention, the rotating shaft assembly further comprises a supporting shaft body, a limiting pin and rotating shaft joints, two sets of the rotating shaft joints are respectively and rotatably arranged on two sets of the side connecting arms, two end parts of the supporting shaft body are respectively provided with an occlusion groove, the occlusion grooves are respectively sleeved on the two sets of the rotating shaft joints, and the limiting pin simultaneously penetrates through the occlusion grooves and limiting holes of the rotating shaft joints. The structure can be convenient for the disassembly and the assembly of the supporting shaft body and the replacement and the assembly of the coiled materials.

In the invention, the bicycle wheel set further comprises two groups of running wheels and a connecting axle bridge which is rotatably connected between the two groups of running wheels, and the third telescopic part is connected with the connecting axle bridge through a universal ball head. The connecting buckles of the universal ball heads are connected, so that the orientation of the self-propelled wheels can be adjusted in the later stage, and the mobile equipment can be moved when the mobile equipment is transversely adjusted.

Compared with the prior art, the invention has the beneficial effects that:

according to the device, the plurality of groups of mobile equipment are arranged on the laying main body in a sliding mode, and the movement of the laying main body is driven by the plurality of groups of mobile equipment, so that the safety of construction can be improved by manual assistance, and in addition, the laying main body is more flexible and more convenient to move by the mobile equipment, so that the construction efficiency of the laying main body can be improved.

Meanwhile, the operation support arm assembly in each group of mobile equipment can adjust the angle of an included angle between the operation support arm assembly and the ground, so that the posture of the vehicle body of the laying equipment can be adjusted, the operation stability of the laying equipment during construction in operation scenes with different gradients can be ensured, and the position of the gravity center of the laying main body can be more conveniently adjusted after the inclination angle adjusting device of the laying main body is added, so that the stability of the laying equipment in the operation process can be further ensured, and the condition of toppling is prevented.

In addition, the transverse moving slide rail and the second telescopic part can drive the mobile equipment to move along the length extending direction of the bearing cross arm, so that obstacles in a traveling path can be avoided, and the passing performance is improved.

Drawings

Fig. 1 is a schematic view of the general structure of the present invention.

Fig. 2 is an exploded view of the mobile device of the present invention.

Fig. 3 is a side view of the paving body of the present invention when the inclination angle is adjusted.

Fig. 4 is a side view of the present invention when working on a work surface having a slope.

Fig. 5 is a schematic view of the overall structure of the paving main body in the present invention.

Fig. 6 is a schematic view of a connecting structure between a bearing cross arm and a transverse sliding rail in the invention.

Fig. 7 is an electrical control block diagram in the present invention.

In the drawings: 1. a force bearing wheel carrier; 11. a bicycle wheel set; 12. a first telescopic part; 13. connecting the outer sleeve; 14. a first power supply unit; 15. a first drive unit; 16. a first control unit; 17. a drive gear; 18. an angle adjusting inner sleeve; 181. an angle-adjusting gear ring; 182. fixing an end cover; 20. a force-bearing cross arm; 21. a side connecting arm; 30. a second driving unit; 31. a speed reducer; 32. a transmission assembly; 41. a rotating shaft joint; 42. a support shaft body; 43. a geotechnical coiled material; 44. a spacing pin; 50. transversely moving the sliding rail; 51. a second telescoping portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 7, a preferred embodiment of the present invention provides a geotechnical coiled material laying apparatus, which includes a laying main body, a plurality of sets of mobile devices slidably disposed on the laying main body, and an energy supply assembly for supplying energy to the laying main body and components in the mobile devices; the energy supply assembly comprises a power supply assembly, a hydraulic station and a general controller, and as shown in fig. 7, the general controller can control the power supply assembly and the hydraulic station to supply energy to each group of driving components in the system so as to ensure that the driving components can perform normal driving operation. The specific driving component can be selected according to the actual use requirements of all places, such as the existing components capable of realizing the telescopic or rotary driving function, such as a hydraulic rod, a hydraulic cylinder, an electric cylinder, a motor, a hydraulic motor and the like. And the connection regulation and control of the driving part, the energy supply assembly and the master controller are the prior art and are not described herein again.

As shown in fig. 4, the mobile device includes a connection jacket 13 and two sets of operation arm assemblies, the two sets of operation arm assemblies are symmetrically hinged to two sides of the connection jacket 13, each operation arm assembly includes a bearing wheel frame 1, a bicycle wheel set 11 and a first telescopic portion 12, the bicycle wheel set 11 is connected to one end of the bearing wheel frame 1, the other end of the bearing wheel frame 1 is hinged to the connection jacket 13, and the first telescopic portion 12 is hinged to the connection jacket 13 and connected between the bearing wheel frame 1 and the connection jacket 13. The bicycle wheel set 11 is set to be a wheel with an in-wheel motor, the in-wheel motor is connected with the energy supply assembly, and the rotation of the in-wheel motor is controlled through the master controller so that the movement of the bicycle wheel set 11 can be controlled. The first telescopic part 12 can be a hydraulic telescopic rod, and the size of an included angle between the force bearing wheel carrier 1 and the ground is changed by extending and retracting the movable end of the first telescopic part, so that the posture of the vehicle body of the whole laying equipment is adjusted. So as to ensure that the construction is more stable when the construction surface with slope is laid.

As shown in fig. 2 and 3, the angle adjusting inner sleeve 18 is rotatably inserted into the connecting outer sleeve 13 through the rotating bearing, and the rotating bearing can be set into multiple groups, so that the weight of the whole geotextile coiled material 43 is heavy after the geotextile coiled material is installed, and thus multiple groups of rotating bearings are required to be arranged to share the weight, and the service life of the bearing can be prolonged. An angle adjusting gear ring 181 is integrally formed and fixed on one side end face of the angle adjusting inner sleeve 18, a first driving unit 15 is fixedly arranged on the connecting outer sleeve 13, the first driving unit 15 can be set as a driving motor, in order to further improve the torque of the motor, the output end of the first driving unit 15 can be connected with a speed reducer 31, the output end of the speed reducer 31 is connected with a driving gear 17, and the driving gear 17 and the angle adjusting gear ring 181 are set to be in a meshed state. Therefore, the laying main body can be driven to rotate by the driving of the driving motor. And still fixed first energy supply unit 14 and the first control unit 16 of having integrateed on connecting overcoat 13, through the motion state of first control unit 16 control driving motor, first energy supply unit 14 provides the power for first drive unit 15, because this driving motor uses the frequency lower in the in-service use, and power consumptive less, so can select the battery as first energy supply unit 14, need when carrying out the regulation to laying the inclination of main part simultaneously, in order to guarantee the synchronism of each group of driving motor's operation state control of each group of first control unit 16, this each group of first controller receives the control regulation and control of the total controller in the energy supply subassembly in unison. Therefore, multiple groups of driving motors can simultaneously apply force to the bearing cross arm 20 to drive the laying main body to rotate, and accordingly the torque borne by each group of driving motors is reduced, and the service life is prolonged. When the inclination angle of the laying main body is not required to be adjusted or kept, the rotating shaft of the driving motor can rotate freely, so that the freedom degree of relative rotation between the connecting outer sleeve and the angle adjusting inner sleeve 18 is not restricted when each group of operation support arm assemblies carry out posture adjustment, the adjusting difficulty of a control part during posture adjustment is reduced, and the operation of workers is facilitated.

As shown in fig. 5, the laying main body comprises a force-bearing cross arm 20, side connecting arms 21 and a rotating shaft assembly, wherein two groups of side connecting arms 21 are vertically fixed at two side ends of the force-bearing cross arm 20, and the rotating shaft assembly is rotatably connected between the two groups of side connecting arms 21. The laying main body is fixedly provided with a power unit, the power unit comprises a second driving unit 30 and a transmission component 32, and the output end of the second driving unit 30 is connected with the rotating shaft component through the transmission component 32. The transmission assembly 32 can be arranged as an annular transmission connecting part such as a chain or a rack, the rotation condition of the rotating shaft assembly can be controlled through the power unit, and the geotextile coiled material 43 fixed on the support shaft body 42 can be conveniently folded and unfolded. The power unit can be set as an electric motor or a hydraulic motor, and is also provided with a corresponding speed reducer 31 connected to reduce the rotating speed and increase the torque under the condition of the required increased torque.

The cross sections of the side connecting arm 21 and the force-bearing cross arm 20 are I-shaped, and the transmission assembly 32 is positioned in a groove at one side of the I-shaped side connecting arm 21, which is far away from the force-bearing cross arm 20. This structural arrangement has utilized side linking arm 21 to be the structural style of I shape, and this structure provides the protection for drive assembly 32, prevents the destruction of exogenic force to drive assembly 32 in the work progress. The pivot subassembly includes support axis body 42, spacer pin 44 and pivot joint 41, and two sets of pivot joints 41 rotate respectively and set up on two sets of side linking arms 21, and the interlock groove has all been seted up at the both ends of support axis body 42, and the interlock groove overlaps respectively to be located on two sets of pivot joints 41, and spacer pin 44 passes simultaneously and penetrates in the spacing downthehole of interlock groove and pivot joint 41. This structure can be convenient for support axis body 42's dismantlement installation, the change installation of the coiled material of being convenient for. The bearing cross arm 20 and the side connecting arm 21 of the I-shaped structure can reduce the weight of the structure, and continuous X-shaped reinforcing ribs can be arranged in the groove of the I-shaped structure to increase the strength of the bearing cross arm 20 and the side connecting arm 21. The total weight of the whole laying body and the loaded geotechnical coiled material 43 is limited by the radial bearing force of the multiple groups of rotating bearings and the total torsion force of the multiple groups of first driving units 15, and in actual use, the specification of the geotechnical coiled material 43 which can be loaded is selected according to the condition of the maximum loading weight when the device is designed.

As shown in fig. 6, a traverse slide 50 and a second telescopic part 51 are fixedly arranged in the groove of the bearing cross arm 20, the second telescopic part 51 drives a slide block to displace on the traverse slide 50, and the slide block is fixedly connected with the inner side wall of the angle adjusting inner sleeve 18. The transverse moving slide rail 50 and the second telescopic part 51 can drive the mobile equipment to move along the length extension direction of the bearing cross arm 20, so that the obstacle in the traveling path can be avoided, and the passing performance is improved. The transverse sliding rail 50 and the second telescopic part 51 are arranged in the groove of the bearing cross arm 20, so that damage caused by impact of external force in the construction process can be prevented. The transverse sliding rail 50 is fixedly arranged along the length extending direction of the bearing cross arm 20, and then the second telescopic part 51 is connected with the sliding block to drive the sliding block to slide on the sliding rail through the telescopic of the second telescopic part 51, and simultaneously, the sliding block is also connected with the angle modulation inner sleeve 18, so that the angle modulation inner sleeve 18 can be driven by the sliding block to slide on the bearing cross arm 20. In addition, the angle adjusting gear ring 181 and the fixed end cover 182 are fixedly connected to the two end sides of the angle adjusting inner sleeve 18, and the connecting outer sleeve 13 is clamped between the angle adjusting gear ring 181 and the fixed end cover 182, so that when the angle adjusting inner sleeve 18 moves, the connecting outer sleeve 13 can be driven to move, and further the operation support arm component hinged on the connecting outer sleeve 13 can be driven to slide along the length extension direction of the force bearing cross arm 20. Meanwhile, when the operation support arm component slides, the bicycle set 11 needs to be rotated, so that the rotation direction of the bicycle set 11 and the sliding direction of the operation support arm component are the same. Therefore, in the process of performing the transverse sliding of the operation support arm component, on one hand, the operation support arm component can be driven by the second telescopic part 51, and on the other hand, the operation support arm component can also be driven by the driving force of the bicycle set 11 or the driving force of the bicycle set 11 is combined to drive the sliding of the operation support arm component.

A third telescopic part is connected between the bearing wheel frame 1 and the bicycle wheel set 11. The third pars contractilis can adjust this laying device's height, and the third pars contractilis can set up to the pneumatic cylinder, adjusts the distance of laying the main part apart from ground through the flexible of pneumatic cylinder expansion end. The bicycle wheel set 11 comprises two groups of running wheels and a connecting axle bridge which is rotatably connected between the two groups of running wheels, and the third telescopic part is connected with the connecting axle bridge through a universal ball head. The connection of the universal ball head can increase the adjusting range of the angle between the bicycle wheel set 11 and the bearing wheel carrier 1, so that the later adjustment of the running direction of the bicycle wheel is facilitated. The connection form between the bicycle wheel set 11 and the carrier wheel frame 1 can be changed into the connection form of the connection bracket of the existing universal wheel.

The working principle is as follows:

firstly, the laying main body is driven to the operation surface, then the staff penetrates the supporting shaft body 42 into the hollow iron core of the geotechnical coiled material 43, and carries out limiting fixation through the limiting pin 44, and then fixedly connects the two ends of the supporting shaft body 42 with the two rotating shaft joints 41 through the limiting pin 44. Then the second driving unit 30 is adjusted and checked to be in a normal operation state, and then the geotechnical coiled material 43 is driven to rotate by controlling the rotation of the second driving unit 30, and the materials which are rolled together are unfolded and laid to a specified position. Meanwhile, the working personnel also need to control the running speed of the bicycle wheel set 11 through the master controller, and adjust the included angle between the bearing wheel carrier 1 in each group of running support arm assemblies and the ground when encountering working surfaces with different gradients in the running process so as to ensure that the stable vehicle body posture is achieved until the paving operation is completed.

The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.

Claims

1. The earthwork coiled material laying equipment is characterized by comprising a laying main body, a plurality of groups of mobile equipment and an energy supply component, wherein the mobile equipment is arranged on the laying main body in a sliding mode and is used for driving the laying main body to move, and the energy supply component drives the laying main body and a driving part in the mobile equipment to stretch or rotate;

the mobile equipment comprises a connecting outer sleeve (13) and two groups of operating support arm assemblies, wherein the operating support arm assemblies are symmetrically hinged to two sides of the connecting outer sleeve (13), each operating support arm assembly comprises a bearing wheel carrier (10), a self-wheel set (11) and a first telescopic portion (12), the self-wheel set (11) is connected to one end portion of the bearing wheel carrier (10), the self-wheel set (11) drives a laying main body to move, the other end portion of the bearing wheel carrier (10) is hinged to the connecting outer sleeve (13), the first telescopic portion (12) is hinged to the connecting outer sleeve (13) and connected between the bearing wheel carrier (10) and the connecting outer sleeve (13), and the included angle between the bearing wheel carrier (10) and the ground is changed through the stretching of the length of the first telescopic portion (12).

2. The earthwork coil laying equipment according to claim 1, wherein an angle adjusting inner sleeve (18) is rotatably penetrated in the connecting outer sleeve (13), an angle adjusting gear ring (181) is fixedly arranged on one side end surface of the angle adjusting inner sleeve (18), a first driving unit (15) is fixedly arranged on the connecting outer sleeve (13), the first driving unit (15) drives the driving gear (17) to rotate, and then the angle adjusting gear ring (181) is driven to rotate by the driving gear (17).

3. The earthwork roll laying apparatus according to claim 2 wherein the laying body comprises a force-bearing cross arm (20), side link arms (21) and a rotary shaft assembly, wherein two sets of the side link arms (21) are vertically fixed at both side ends of the force-bearing cross arm (20), and the rotary shaft assembly is rotatably connected between the two sets of the side link arms (21).

4. The earthwork web laying apparatus according to claim 3 wherein a power unit is fixed on the laying body, the power unit comprises a second driving unit (30) and a transmission component (32), and an output end of the second driving unit (30) is connected with the rotating shaft component through the transmission component (32).

5. Geotechnical coil laying equipment according to claim 4, characterised in that the side connecting arms (21) and the load-bearing cross arm (20) are provided as I-steel, and the transmission assembly (32) is located in a groove on the side of the I-shaped side connecting arm (21) far away from the load-bearing cross arm (20).

6. The earthwork roll laying apparatus according to claim 5, wherein a traverse slide rail (50) and a second telescopic part (51) are fixedly arranged in the groove of the force bearing cross arm (20), the second telescopic part (51) drives a slide block to displace on the traverse slide rail (50), and the slide block is fixedly connected with the inner side wall of the angle adjusting inner sleeve (18).

7. The earthwork coiled material laying apparatus according to claim 1, wherein a third expansion part is connected between the force bearing wheel carrier (10) and the self-running wheel set (11), and the distance between the laying main body and the ground is increased or decreased by the expansion and contraction of the third expansion part.

8. Geotechnical coil laying device according to claim 2, characterised in that a first energy supply unit (14) and a first control unit (16) are fixed to said connecting jacket (13), said first control unit (16) controlling said first energy supply unit (14) to drive said first drive unit (15) to start and stop.

9. The earthwork coiled material laying equipment according to claim 3, wherein the rotating shaft assembly comprises a supporting shaft body (42), a limiting pin (44) and rotating shaft joints (41), two sets of the rotating shaft joints (41) are respectively and rotatably arranged on two sets of the side connecting arms (21), two end portions of the supporting shaft body (42) are respectively provided with an engagement groove, the engagement grooves are respectively sleeved on the two sets of the rotating shaft joints (41), and the limiting pin (44) is simultaneously penetrated in the engagement grooves and the limiting holes of the rotating shaft joints (41).

10. Geotechnical coil laying equipment according to claim 7, characterised in that said self-propelled wheel group (11) comprises two sets of running wheels and a connecting axle bridge rotatably connected between said two sets of running wheels, said third telescopic part being connected to said connecting axle bridge by means of a ball-and-socket joint.