An electric tensioning device for geocell and a construction method for geocell

Abstract

The present invention discloses a geocell electric tensioning device and a geocell construction method. The electric tensioning device includes a tensioning telescopic mechanism and a tensioning and net-hanging mechanism. The tensioning telescopic mechanism includes a control base, a two-way hydraulic component and a winch. The hydraulic telescopic arms on the two-way hydraulic component are located on both sides of the control base and fixed parts A are provided at their ends. The tensioning and net-hanging mechanism includes a net-hanging mechanism A and a net-hanging mechanism B. The net-hanging mechanism A includes a support rail, a cylindrical shaft and a slider, and is arranged on both sides of the tensioning telescopic mechanism. The net-hanging mechanism B is a telescopic tube or composed of multiple sleeves with different pipe diameters sleeved together. A geocell fixing clamp, a fixing buckle and a fixed part C are installed on the net-hanging mechanism B. The fixing buckle is connected to the winch through a pulling rope. Both ends of the net-hanging mechanism B are connected to the corresponding net-hanging mechanism A on the same side. The geocell construction method includes determining the laying area, connecting the geocells, laying the electric tensioning device, hanging the geocells on the net, tensioning and inspecting the laying area.

Description

Technical Field

[0001] The present invention belongs to the field of engineering equipment, and particularly relates to a geocell electric tensioning device and a geocell construction method. Background Art

[0002] A geocell is a net-like cell structure formed by welding or riveting high-strength HDPE or PP copolymer wide bands. It is light in weight, wear-resistant, chemically stable, resistant to photo-oxidative aging, and resistant to acids and alkalis. It can be applied to different soil and desert soil environments. It can be used as a cushion to treat soft foundations and increase the bearing capacity of the foundations, can also be laid on slopes to form slope protection structures, and can also be used to build retaining structures, etc. Geocells have the advantages of being flexible and foldable during transportation. During construction, they need to be tensioned into a net shape and filled with loose materials such as gravel, soil, and concrete. However, the current geocells have the following problems in use: Geocells are flexible materials and are in a folded state during transportation. When they are put into work, four or eight people are required to tension them simultaneously, which is very labor-consuming and has extremely low work efficiency. If the geocell is not in a tensioned state during the filling operation, the geocell may deform during the process of filling loose materials such as gravel, soil, and concrete inside the geocell, affecting the construction quality; the existing geocell tensioning devices have poor versatility, and one set of tensioning device can only correspond to geocells of corresponding specifications. Therefore, during construction, multiple sets of tensioning devices often need to be equipped to meet the construction requirements, increasing the construction cost. Summary of the Invention

[0003] In order to solve the above problems, the present application provides a geocell electric tensioning device and a geocell construction method. This device can make the geocell 7 have uniform tension and relaxation, is simple and easy to operate, and can also be applicable to geocells 7 of different specifications, improving the work efficiency of geocell 7 tensioning while reducing costs.

[0004] The present invention provides a geocell electric tensioning device, which comprises a tensioning and telescoping mechanism (1) and a tensioning and net-hanging mechanism. The tensioning and telescoping mechanism (1) comprises a control base (11), a two-way hydraulic component (12) and a winch (13). The two-way hydraulic component (12) and the winch (13) are both fixed on the control base (11). The two-way hydraulic component (12) comprises a hydraulic cylinder and a hydraulic telescopic arm. The hydraulic telescopic arms are located on both sides of the control base (11), and a fixing part A is provided at the end of the hydraulic telescopic arm. The tensioning and net-hanging mechanism comprises a net-hanging mechanism A (21) and a net-hanging mechanism B (22). The net-hanging mechanism A (21) comprises a support rail (211), a cylindrical shaft (212) and a plurality of sliders (213). The cylindrical shaft (212) is fixed on the support rail (211), and the plurality of sliders (213) are sleeved on the cylindrical shaft (212). A plurality of geocell fixing clamps are arranged on the side surface of the slider (213). Fixing parts B are provided at both ends of the support rail (211). The net-hanging mechanism A (21) is arranged on both sides of the tensioning and telescoping mechanism (1), and one end of the net-hanging mechanism A (21) can be connected to the fixing part A at the end of the hydraulic telescopic arm through the fixing part B, and the other end is fixed in the geocell laying area. The net-hanging mechanism B (22) is a telescopic tube, or the net-hanging mechanism B (22) comprises a plurality of sleeves (223) with different pipe diameters, and the plurality of sleeves (223) can be sleeved with each other. A plurality of geocell fixing clamps, fixing buckles (222) and fixing parts C are installed on the net-hanging mechanism B (22). The geocell fixing clamps and the fixing buckles (222) are fixed or sleeved on the tube body of the net-hanging mechanism B (22). The fixing buckles (222) are connected to the winch (13) through a pulling rope (3). The fixing parts C are located at both ends of the net-hanging mechanism B (22). The net-hanging mechanism B (22) is horizontally arranged with the tensioning and telescoping mechanism (1), and both ends thereof are connected to the net-hanging mechanisms A (21) arranged on both sides of the tensioning and telescoping mechanism (1) through the fixing parts C respectively.

[0005] As a preferred solution of the present application, a controller is provided. The controller comprises a control unit, a control switch (51) and a tensiometer (52). The control unit and the control switch (51) are both arranged on the control base (11). The tensiometer (52) is arranged on the pulling rope (3) between the winch (13) and the net-hanging mechanism B (22). The control switch (51) can control the working state of the winch (13). When the tension value displayed by the tensiometer (52) is equal to the set tension threshold value, the control unit will cut off the power supply of the winch (13) through the control switch (51). The threshold value of the tensiometer (52) is determined according to the specifications of the geocell (7) to be tensioned.

[0006] As a preferred embodiment of the present application, the geocell fixing fixture includes a pin-type fixture (214) and / or a clamping-type fixture (221). The pin-type fixture (214) has a "C"-shaped structure, and pin holes are provided on the upper and lower sides of the "C"-shaped structure, and corresponding pins (2141) are provided in the pin holes. The clamping-type fixture (221) includes two clamping plates (2211), and locking mechanisms (2212) are respectively provided at the upper and lower ends of the two clamping plates (2211). The distance between the two clamping plates (2211) can be adjusted by adjusting the tightness of the locking mechanisms (2212).

[0007] As a preferred embodiment of the present application, a traveling mechanism (111) is provided at the bottom of the control base (11), and the traveling mechanism (111) includes rollers and a steering bracket.

[0008] As a preferred embodiment of the present application, the fixing member A, the fixing member B, and the fixing member C are all fixing holes (6), and a fixing rod and / or an anchor rod (4) can be inserted into the fixing holes (6).

[0009] As a preferred embodiment of the present application, when the hanging net mechanism B (22) includes a plurality of sleeves (223) with different pipe diameters, equal-diameter round holes (224) are provided at the end heads of the sleeves (223), and they are connected by inserting a fixing rod into the round holes (224).

[0010] The present application also provides a geocell construction method using the above-mentioned geocell electric tensioning device, which includes the following steps;

[0011] S1: Determine the laying area;

[0012] S2: Insert the anchor rod (4) at the starting section of the laying area;

[0013] S3: Pre-connect the geocells (7). Open the geocell (7) products to be tensioned, place the geocells (7) in sequence along the laying length direction, and pre-connect multiple geocells with special geocell connectors;

[0014] S4: Lay the electric tensioning device, specifically including:

[0015] S41: Distribute and fix the hanging net mechanism A (21) on both sides of the laying area, that is, the distribution direction of the hanging net mechanism A (21) is perpendicular to the starting section of the laying area. At the same time, determine the number of sliders (213) installed on the hanging net mechanism A (21) according to the specification size of the geocell (7) to be tensioned;

[0016] S42: Move both the tensioning and telescoping mechanism (1) and the mesh hanging mechanism B (22) to the tensioning side of the laying area. Then, adjust the lengths of the hydraulic telescopic arms in the mesh hanging mechanism B (22) and the tensioning and telescoping mechanism (1) according to the laying area. Finally, connect the two ends of the mesh hanging mechanism B (22) to the corresponding mesh hanging mechanism A (21) on its corresponding side through the fixing member C; connect the end of the hydraulic telescopic arm to the fixing member B on the corresponding mesh hanging mechanism A (21) on its corresponding side through the fixing member A. At the same time, connect the mesh hanging mechanism B (22) and the winch (13) through the pulling rope (3) and the fixing buckle (222).

[0017] S5: Hang the geocell (7), specifically including: Hang the hanging points of the geocell (7) in sequence on the anchor bolts (4) that have been driven in the starting section in the width direction. The hanging points on both sides of the geocell (7) are sequentially clamped on the geocell fixing fixtures on the sliders (213) of the mesh hanging mechanism A (21). The hanging points on the tensioning side of the geocell (7) are sequentially clamped on the geocell fixing fixtures of the mesh hanging mechanism B (22).

[0018] S6: Tension the geocell (7), specifically including: Connect the power supply of the winch (13), and contract the pulling rope (3) through the winch (13) so that the geocell (7) is fully tensioned and in a taut state.

[0019] S7: Fix the geocell (7), specifically including: If there is no need for further laying, use the anchor bolts (4) to fix the hanging points on both sides and the tensioning side of the geocell (7) in place. At the same time, remove the mesh hanging mechanism A (21), the mesh hanging mechanism B (22), and the tensioning and telescoping mechanism (1). After completing the above operations, enter step S9; If continuous laying is still required, use the anchor bolts (4) to fix the hanging points on both sides of the geocell (7) in place, and do not fix the tensioning side. At the same time, remove the mesh hanging mechanism A (21), the mesh hanging mechanism B (22), and the tensioning and telescoping mechanism (1). After completing the above operations, enter step S8.

[0020] S8: Repeat steps S3 - S7 again to complete the continuous tensioning, laying, and fixing of the geocell (7).

[0021] S9: Inspection of the laying area: After laying, check that the geocell (7) in the laying area is fully unfolded and in a taut state, check that the fixed anchor bolts (4) are in an effective fixed state and the connection between geocell (7) groups is firm. If necessary, re-fix. After all inspections are completed, prepare for subsequent filling and compaction.

[0022] In step S6, a tensiometer (52) is provided on the pulling rope (3) between the hoist (13) and the net hanging mechanism B (22). When the tensiometer (52) reaches the tensile threshold, the geocell (7) is fully tensioned and in a taut state. Among them, the tensile threshold of the tensiometer (52) is calculated by cumulative superposition of the hanging points on the net hanging mechanism B (22). The specific calculation method is as follows:

[0023] When the geocell (7) is stretched bidirectionally, it is assumed that the geocell (7) has n stretching nodes along the length X and width Y directions respectively. Each cell in the geocell (7) uniformly expands with the overall deformation, and it is considered that the sheet deformation of each cell is the same, and the included angle between adjacent sheets along the width Y direction is the same. Theoretically, when the geocell (7) is under the action of tensile force, the displacement of each measuring point in different directions is the same. Through theoretical derivation, the following relationship between the overall deformation amount L of the geocell (7) and the sheet deformation amount l can be obtained:

[0024] (1)

[0025] (2)

[0026] In the formula: 、 are the overall deformation amounts of the geocell (7) along the length X and width Y directions respectively, 、 are the deformation amounts of the overall along the length X and width Y directions caused by node deformation respectively, 、 are the strains of the measured sheets in the length X and width Y directions respectively, is the included angle between adjacent sheets along the main stress direction of the geocell 7;

[0027] When the sheet is under the action of tensile force, it shows an exponential growth trend within the small strain range. During the bidirectional stretching process, considering the sheet elongation within 1%, in the ideal state of bidirectional stretching, each sheet uniformly deforms with the overall geocell (7). During the stretching process, the geocell (7) uniformly deforms along the length X and width Y directions at a speed of 1 mm / min, and the sheet is in a force equilibrium state, and the tensile force is , according to the principle of force synthesis, the force on any sheet satisfies , where is the force acting on each stretching node under bidirectional stretching; The overall strength of the geocell (7) and the sheet strength satisfy:

[0028] (3)

[0029] (4) According to the biaxial tension test of the geocell (7), it can be seen that the geocell (7) has strong anisotropy under tensile action. Therefore, on this basis, the anisotropy coefficient is introduced. To correct the tensile strength, the overall strength of the geocell (7) and the strength of the sheet material satisfy:

[0030] (5)

[0031] (6)

[0032] In the formula: is the anisotropy coefficient of the geocell (7), taking values from 1.02 to 1.10; the tensile force of the sheet material , = 0.3 kN; the initial cross-sectional area of the sheet material is , and the cross-sectional area of the sheet material at a certain moment during tensile change is ; is the stress of the sheet material. According to Hooke's law, the relationship between the overall strength of the geocell (7) and the strength of the sheet material satisfies:

[0033] (7)

[0034] (8)

[0035] In this way, the tension threshold of the tensiometer (52) can be determined according to the tensile force in the tension direction.

[0036] As a preferred solution of the present application, in step S2, the wide-width end on one side of the laying area is used as the starting section, and the anchor rod (4) is started along the diagonal distance of the grid size of the geocell (7) from the starting point, and the anchor rods (4) are arranged in sequence according to the grid size of the geocell (7) to be laid this time. The anchor rod (4) is required to be more than 10 cm above the laying surface, and the depth of the anchor rod (4) buried in the ground is 30 cm to 40 cm.

[0037] As a preferred solution of the present application, in step S41, one end of the net hanging mechanism A (21) close to the starting section of the laying area is fixed by the anchor rod (4).

[0038] Compared with the prior art, the advantages of the geocell electric tensioning device in the present application are as follows:

[0039] (1) The geocell electric tensioning device provided in the present application is simple to install, convenient to operate, saves manpower and reduces the labor intensity of personnel;

[0040] (2) The geocell electric tensioning device provided by this application only requires one person to complete the tensioning operation of the geocell 7, and can make the geocell 7 relax evenly, reducing labor costs while improving the working efficiency of geocell 7 tensioning;

[0041] (3) The lengths of the hydraulic telescopic arm and the net hanging mechanism B22 of the geocell electric tensioning device provided by this application, as well as the number of sliders 213 on the net hanging mechanism A21, can all be adjusted as needed. In this way, the width can be adjusted according to the specification size of the geocell 7 to be tensioned, and one device can be used to tension geocells 7 of different specifications, reducing the economic cost during actual construction.

[0042] Compared with the prior art, the advantages of the geocell construction method in this application are as follows:

[0043] (1) The geocell construction method provided by this application is convenient to operate. Only one person is required to complete the tensioning operation of the geocell 7, and the geocell 7 can be relaxed evenly, reducing labor costs while improving the working efficiency of geocell 7 tensioning;

[0044] (2) The geocell construction method provided by this application can be used to tension geocells 7 of various different specifications, thus reducing the economic cost during actual construction. Description of the Drawings

[0045] Figure 1 It is a schematic structural diagram of the connection between the geocell electric tensioning device and the geocell provided in Embodiment 1 of the present invention.

[0046] Figure 2 It is a schematic side view structure diagram of the tensioning telescopic mechanism provided in Embodiment 1 of the present invention.

[0047] Figure 3 It is a schematic front view structure diagram of the net hanging mechanism A provided in Embodiment 1 of the present invention.

[0048] Figure 4 It is a schematic side view structure diagram of the net hanging mechanism A provided in Embodiment 1 of the present invention.

[0049] Figure 5 It is a schematic three-dimensional structure diagram of the net hanging mechanism A provided in Embodiment 1 of the present invention.

[0050] Figure 6 It is a schematic structure diagram of a net hanging mechanism B provided in Embodiment 1 of the present invention.

[0051] Figure 7 It is a schematic structure diagram of another net hanging mechanism B provided in Embodiment 1 of the present invention.

[0052] Figure 8Schematic structural diagram of the plug-type fixture provided in Embodiment 1 of the present invention.

[0053] Figure 9 Schematic perspective structural diagram of the plug-type fixture provided in Embodiment 1 of the present invention.

[0054] Figure 10 Front view structural diagram of the clamping fixture provided in Embodiment 1 of the present invention.

[0055] Figure 11 Side view structural diagram of the clamping fixture provided in Embodiment 1 of the present invention.

[0056] Figure 12 Schematic perspective structural diagram of the clamping fixture provided in Embodiment 1 of the present invention.

[0057] Figure 13 Schematic control structure diagram of the controller provided in Embodiment 1 of the present invention.

[0058] Figure 14 Flowchart of the construction method of the geocell provided in Embodiment 2 of the present invention.

[0059] Reference numerals

[0060] Tensioning telescopic mechanism 1, control base 11, traveling mechanism 111, bidirectional hydraulic component 12, winch 13, net hanging mechanism A 21, support rail 211, cylindrical shaft 212, slider 213, plug-type fixture 214, pin 2141, connecting part A 2142, net hanging mechanism B 22, clamping fixture 221, clamping plate 2211, locking mechanism 2212, connecting part B 2213, fixing buckle 222, sleeve 223, round hole 224, pulling rope 3, anchor rod 4, control switch 51, tensiometer 52, wire 53, fixing hole 6, geocell 7. Detailed implementation manners

[0061] Embodiment 1:

[0062] This embodiment provides an electric tensioning device for geocells. Refer to Figure 1 , this electric tensioning device includes a tensioning telescopic mechanism 1 and a tensioning net hanging mechanism. The tensioning telescopic mechanism 1 includes a control base 11, a bidirectional hydraulic component 12 and a winch 13. The bidirectional hydraulic component 12 and the winch 13 are both fixed on the control base 11. The bidirectional hydraulic component 12 includes a hydraulic cylinder and a hydraulic telescopic arm. The hydraulic telescopic arms are located on both sides of the control base 11, and a fixing member A is provided at the end of the hydraulic telescopic arm. In this embodiment, preferably, the winch 13 is fixed on one side surface of the control base 11. Refer to Figure 2 ; the tensioning net hanging mechanism includes a net hanging mechanism A 21 and a net hanging mechanism B 22. The net hanging mechanism A 21 includes a support rail 211, a cylindrical shaft 212 and a plurality of sliders 213. Refer toFigures 3 - 5 , the cylindrical shaft 212 is detachably or fixedly installed on the support rail 211, or the cylindrical shaft 212 is integrally formed with the support rail 211. A plurality of sliders 213 are sleeved on the cylindrical shaft 212. In this embodiment, the number of sliders 213 can be increased or decreased according to actual needs. A plurality of geogrid fixing clamps are fixedly arranged on the side surface of the slider 213. Fixing members B are provided at both ends of the support rail 211. The hanging net mechanism A21 is arranged on both sides of the tensioning and telescoping mechanism 1 and can connect one end of the hanging net mechanism A21 close to the hydraulic telescopic arm to the fixing member A at the end of the hydraulic telescopic arm through the fixing member B, and fix the end of the hanging net mechanism A21 far from the hydraulic telescopic arm to the starting section of the geogrid laying area through the anchor rod 4; The hanging net mechanism B22 is a telescopic tube, or the hanging net mechanism B22 includes multiple sets of sleeves 223 with different pipe diameters, and these multiple sets of sleeves 223 can be sleeved with each other. In this embodiment, it is preferably that the hanging net mechanism B22 is formed by sleeving multiple sets of sleeves 223 with different pipe diameters. In order to ensure that the sleeves 223 are firmly sleeved and prevent the adjacent two sleeves 223 from becoming disconnected, it is preferably that equal-diameter round holes 224 are opened at the end heads of each sleeve 223 and they are connected by inserting pins 2141 into the round holes 224. In actual use, different lengths or different numbers of sleeves 223 can be selected for sleeving combination according to the required length (width). Refer to Figure 6 , the hanging net mechanism B22 provided in this embodiment includes two sets of sleeves 223. In actual use, the overall length (width) of the hanging net mechanism B22 can be adjusted by selecting the length of at least one set of sleeves 223 among the two sets of sleeves 223. Refer to Figure 7 , the hanging net mechanism provided in this embodiment includes more than two sets of sleeves 223. In actual use, the overall length (width) of the hanging net mechanism B22 can be adjusted by increasing the number of sleeves 223. The above are the two preferred adjustment methods for the length of the hanging net mechanism B22 in this embodiment. Any method with the same function under the inspiration of this embodiment belongs to the protection scope of this embodiment. A plurality of geogrid fixing clamps, fixing buckles 222 and fixing members C are installed on the hanging net mechanism B22. The geogrid fixing clamps and the fixing buckles 222 are fixed or sleeved on the tube body of the hanging net mechanism B22. The fixing buckles 222 are connected to the winch 13 through the pulling ropes 3. The fixing members C are located at both ends of the hanging net mechanism B22. The hanging net mechanism B22 and the tensioning and telescoping mechanism 1 are horizontally arranged, and both ends of it are respectively connected to the geogrid fixing clamps on the hanging net mechanisms A21 arranged on both sides of the tensioning and telescoping mechanism 1 through the fixing members C.

[0063] In this embodiment, the fixing members A, B, and C are fixing holes 6 with the same diameter. A pin 2141 and / or an anchor rod 4 can be inserted into the fixing hole 6. The components to which the fixing members A, B, and C belong are fixed by a fixing rod or the anchor rod 4. In this embodiment, it is preferably fixed by the anchor rod 4. In this embodiment, the diameter of the round hole 224 provided at the end of the pipe body of the mesh hanging mechanism B22 for connecting each sleeve 223 is preferably equal to the aperture of the fixing hole 6.

[0064] In this embodiment, in order to facilitate the movement of the tensioning and telescoping mechanism 1, a traveling mechanism 111 is preferably provided at the bottom of the control base 11. The traveling mechanism 111 includes rollers and a steering bracket.

[0065] In this embodiment, the geocell fixing fixture includes a plug-in fixture 214 and a clamping fixture 221. In order to facilitate the fixing of the geocell 7, the plug-in fixture 214 is preferably fixed on the slider 213 of the mesh hanging mechanism A21, and the clamping fixture 221 is installed on the pipe body of the mesh hanging mechanism B22. In this embodiment, the plug-in fixture 214 includes a "C"-shaped structure. Pin holes are provided on the upper and lower sides of the "C"-shaped structure, and corresponding pins 2141 are provided in the pin holes. At the same time, a connecting portion A2142 is provided on the "C"-shaped structure. The plug-in fixture 214 can be connected to the slider 213 through the connecting portion A2142. See Figures 8 - 9 ; The clamping fixture 221 includes two clamping plates 2211. Locking mechanisms 2212 are respectively provided at the upper and lower ends of the two clamping plates 2211. The distance between the two clamping plates 2211 can be adjusted by adjusting the tightness of the locking mechanisms 2212. At the same time, a connecting portion B2213 is provided at the rear end of the two clamping plates 2211. See Figures 10 - 12 In this embodiment, the connecting portion B2213 is preferably a collar, and the diameter of the collar is greater than or equal to the diameter of the sleeve 223 with the largest diameter in the mesh hanging mechanism B22. In this way, the clamping fixture 221 can be sleeved on the sleeve 223 of the mesh hanging mechanism B22.

[0066] In this embodiment, in order to facilitate single-person operation, a controller is preferably provided. The controller includes a control unit, a control switch 51, and a tensiometer 52. A tension threshold is provided in the control unit. It is preset that both the control unit and the control switch 51 are provided on the control base 11, and the tensiometer 52 is provided on the pulling rope 3 between the winch 13 and the mesh hanging mechanism B22. In this embodiment, both the tensiometer 52 and the winch 13 are connected to the control unit through a wire 53. The control switch 51 can control the on / off state of the winch 13. When the tension value displayed by the tensiometer 52 is equal to the set tension threshold, the control unit will cut off the power supply of the winch 13 through the control switch 51. The threshold of the tensiometer 52 is determined according to the specification of the geocell 7 to be tensioned. See Figure 13 This is the control structure diagram of the controller provided for this embodiment.

[0067] Based on the above analysis, it can be seen that the geocell electric tensioning device in this embodiment is simple to install and convenient to operate. Only one person is required to complete the tensioning operation of the geocell 7, and it can make the geocell 7 relax evenly, reducing labor costs and improving the working efficiency of geocell 7 tensioning. At the same time, the lengths of the hydraulic telescopic arm and the net hanging mechanism B22 of the geocell electric tensioning device and the number of sliders 213 on the net hanging mechanism A21 can all be adjusted as needed. In this way, the width can be adjusted according to the specification size of the geocell 7 to be tensioned, and a single device can be used to tension geocells 7 of different specifications, reducing the economic cost in the actual construction process.

[0068] Embodiment 2:

[0069] This embodiment provides a construction method for geocells using the geocell electric tensioning device described in Embodiment 1. This method includes:

[0070] S1: Determine the laying area. Specifically, before tensioning and laying the geocell 7, first determine the site scope of the tensioning work, level the working surface to meet the laying requirements, and then use lime to demarcate the laying area on the laying working surface according to the designed laying width.

[0071] S2: Insert anchor rods 4 at the starting section of the laying area. Specifically, take the wide-width end on one side of the laying area as the starting section, and start driving the anchor rods 4 along the diagonal distance of the geocell 7 grid size from the starting point. Arrange the anchor rods 4 in sequence according to the grid size of the geocell 7 to be laid this time. The anchor rods 4 are required to be more than 10 cm above the laying surface, and the depth of the anchor rods 4 buried in the ground is 30 cm - 40 cm.

[0072] S3: Pre-connect the geocell 7. Open the geocell 7 products to be tensioned, place the geocell 7 along the laying length direction in sequence, and use special geocell connectors to pre-connect multiple geocells.

[0073] S4: Lay the electric tensioning device, specifically including:

[0074] S41: First, distribute the net hanging mechanism A21 on both sides of the laying area, that is, the distribution direction of the net hanging mechanism A21 is perpendicular to the starting section of the laying area. At the same time, determine the number of sliders 213 installed on the net hanging mechanism A21 according to the specification size of the geocell 7 to be tensioned. Then fix one end of the net hanging mechanism A21 close to the starting section of the laying area on the working surface through the anchor rods 4 and the fixing piece B. The depth of the anchor rods 4 buried in the working surface underground is 30 cm - 40 cm.

[0075] S42: Move both the tensioning and telescoping mechanism 1 and the geogrid hanging mechanism B22 to the tensioning side of the laying area. Then, adjust the lengths of the hydraulic telescopic arms in the geogrid hanging mechanism B22 and the tensioning and telescoping mechanism 1 according to the laying area. Finally, connect the two ends of the geogrid hanging mechanism B22 to the geogrid fixing clamps on the corresponding side of the geogrid hanging mechanism A21 through the fixing parts C; connect the end of the hydraulic telescopic arm to the fixing part B on the corresponding side of the geogrid hanging mechanism A21 through the fixing part A. At the same time, connect the geogrid hanging mechanism B22 and the winch 13 through the pulling rope 3 and the fixing buckle 222.

[0076] S5: Hang the geogrid 7, specifically including: Hang the hanging points of the geogrid 7 in sequence in the width direction on the anchor bolts 4 that have been driven in the starting section. The hanging points of the geogrid 7 on both sides are sequentially clamped on the geogrid fixing clamps on the sliders 213 of the geogrid hanging mechanism A21, and the hanging points on the tensioning side of the geogrid 7 are sequentially clamped on the geogrid fixing clamps of the geogrid hanging mechanism B22;

[0077] S6: Tension the geogrid 7, specifically including: Connect the power supply of the winch 13, and contract the pulling rope 3 through the winch 13 so that the geogrid 7 is fully tensioned and in a taut state;

[0078] S7: Fix the geogrid 7, specifically including: If there is no need for further laying, use the anchor bolts 4 to fix the hanging points on both sides and the tensioning side of the geogrid 7 in place. At the same time, remove the geogrid hanging mechanism A21, the geogrid hanging mechanism B22, and the tensioning and telescoping mechanism 1,

[0079] After completing the above operations, proceed to step S9; if continuous laying is still required, use the anchor bolts 4 to fix the hanging points on both sides of the geogrid 7 in place, and do not fix the tensioning side. At the same time, remove the geogrid hanging mechanism A21, the geogrid hanging mechanism B22, and the tensioning and telescoping mechanism 1. After completing the above operations, proceed to step S8;

[0080] S8: Repeat steps S3 - S7 again to complete the continuous tensioning, laying, and fixing of the geogrid 7;

[0081] S9: Inspection of the laying area: After laying, check that the geogrid 7 in the laying area is fully unfolded and in a taut state, check that the fixed anchor bolts 4 are in an effective fixed state and the connections between the geogrid 7 groups are firm. If necessary, re - fix. After all inspections are completed, prepare for subsequent filling and compaction.

[0082] See Figure 14 , which is the flow chart of the geogrid construction method provided in this embodiment.

[0083] In this embodiment, in step S6, a tensiometer 52 is provided on the pulling rope 3 between the winch 13 and the net hanging mechanism B22. When the tensiometer 52 reaches the tensile threshold, the geocell 7 is fully tensioned and in a taut state. Among them, the tensile threshold of the tensiometer 52 is calculated by cumulative superposition of the hanging points on the net hanging mechanism B22. The specific calculation method is as follows:

[0084] When the geocell 7 is biaxially stretched, it is assumed that the geocell 7 has n stretching nodes in the length X and width Y directions respectively. Each cell in the geocell 7 uniformly expands with the overall deformation, and it is considered that the sheet deformation of each cell is the same, and the included angle between adjacent sheets in the width Y direction is the same; theoretically, when the geocell 7 is under the action of tension, each measuring point has the same displacement in different directions. Through theoretical derivation, the following relationship between the overall deformation amount L of the geocell 7 and the sheet deformation amount l can be obtained:

[0085] (1)

[0086] (2)

[0087] In the formula: 、 are the overall deformation amounts of the geocell 7 in the length X and width Y directions respectively, 、 are the deformation amounts of the overall in the length X and width Y directions caused by node deformation respectively, 、 are the strains of the measured sheets in the length X and width Y directions respectively, is the included angle between adjacent sheets along the main stress direction of the geocell 7;

[0088] When the sheet is under the action of tension, it shows an exponential growth trend in the small strain range. During the biaxial stretching process, considering that the sheet elongation is within 1%, in the ideal state during the biaxial stretching process, each sheet uniformly deforms with the overall geocell 7. During the stretching process, the geocell 7 uniformly deforms in the length X and width Y directions at a speed of 1 mm / min, and the sheet is in a force equilibrium state, and the tension is , according to the principle of force synthesis, the force on any sheet satisfies , where is the force acting on each stretching node during biaxial stretching; the overall strength of the geocell 7 and the sheet strength satisfy:

[0089] (3)

[0090] (4)

[0091] According to the biaxial tension test of the geocell 7, it can be seen that the geocell 7 has strong anisotropy under tensile action. Therefore, on this basis, the anisotropy coefficient is introduced to correct the tensile strength. The overall strength of the geocell 7 and the strength of the sheet material satisfy:

[0092] (5)

[0093] (6)

[0094] In the formula: is the anisotropy coefficient of the geocell 7, taking a value of 1.02 - 1.10; the tensile force of the sheet material , = 0.3 kN; the initial cross-sectional area of the sheet material is , and the cross-sectional area of the sheet material at a certain moment during tensile change is ; is the stress of the sheet material. According to Hooke's law, the relationship between the overall strength of the geocell 7 and the strength of the sheet material satisfies:

[0095] (7)

[0096] (8)

[0097] Therefore, the tensile force threshold of the tensiometer 52 can be determined according to the tensile force in the tensile direction.

[0098] In summary, it can be seen from the above analysis that the construction method of the geocell in this embodiment is convenient to operate. Only one person is required to complete the tension operation of the geocell 7, and it can make the geocell 7 relax evenly, reducing the labor cost while improving the working efficiency of the tension of the geocell 7. At the same time, this construction method of the geocell can be used to tension various geocells 7 with different specifications, thus reducing the economic cost in the actual construction process.

[0099] The above are only the embodiments of the present invention. Common knowledge such as the specific structure and characteristics in the solution is not described in detail here. It should be noted that for those skilled in the art, several improvements can be made without departing from the present invention, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be subject to the content of the claims, and the specific implementation manners and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. An electric tensioning device for geocell, characterized in that, It includes a tensioning and telescoping mechanism (1) and a tensioning and net-hanging mechanism. The tensioning and telescoping mechanism (1) includes a control base (11), a two-way hydraulic component (12) and a winch (13). The two-way hydraulic component (12) and the winch (13) are both fixed on the control base (11). The two-way hydraulic component (12) includes a hydraulic cylinder and a hydraulic telescopic arm. The hydraulic telescopic arms are located on both sides of the control base (11), and a fixing member A is provided at the end of the hydraulic telescopic arm. The tensioning and net-hanging mechanism includes a net-hanging mechanism A (21) and a net-hanging mechanism B (22). The net-hanging mechanism A (21) includes a support rail (211), a cylindrical shaft (212) and a plurality of sliders (213). The cylindrical shaft (212) is fixed on the support rail (211). A plurality of the sliders (213) are sleeved on the cylindrical shaft (212). A plurality of geocell fixing clamps are provided on the side of the slider (213). Fixing members B are provided at both ends of the support rail (211). The net-hanging mechanism A (21) is arranged on both sides of the tensioning and telescoping mechanism (1), and one end of the net-hanging mechanism A (21) can be connected to the fixing member A at the end of the hydraulic telescopic arm through the fixing member B, and the other end is fixed in the geocell laying area. The net-hanging mechanism B (22) is a telescopic tube, or the net-hanging mechanism B (22) includes multiple sets of sleeves (223) with different pipe diameters, and the multiple sets of sleeves (223) can be sleeved with each other. A plurality of geocell fixing clamps, fixing buckles (222) and fixing members C are installed on the net-hanging mechanism B (22). The geocell fixing clamps and the fixing buckles (222) are fixed or sleeved on the tube body of the net-hanging mechanism B (22). The fixing buckle (222) is connected to the winch (13) through a pulling rope (3). The fixing member C is located at both ends of the net-hanging mechanism B (22). The net-hanging mechanism B (22) is horizontally arranged with the tensioning and telescoping mechanism (1), and its both ends are connected to the net-hanging mechanisms A (21) arranged on both sides of the tensioning and telescoping mechanism (1) through the fixing member C respectively.

2. The geocell electric tensioning device according to claim 1, characterized in that, A controller is provided. The controller includes a control unit, a control switch (51) and a tensiometer (52). The control unit and the control switch (51) are both arranged on the control base (11). The tensiometer (52) is arranged on the pulling rope (3) between the winch (13) and the net-hanging mechanism B (22). The control switch (51) can control the working state of the winch (13). When the tension value displayed by the tensiometer (52) is equal to the set tension threshold value, the control unit will cut off the power supply of the winch (13) through the control switch (51). The threshold value of the tensiometer (52) is determined according to the specification of the geocell (7) to be tensioned.

3. The geocell electric tensioning device according to claim 1, characterized in that, The geocell fixing fixture includes a pin-type fixture (214) and / or a clamping-type fixture (221). The pin-type fixture (214) has a "C"-shaped structure. Pin holes are provided on the upper and lower sides of the "C"-shaped structure, and corresponding pins (2141) are provided in the pin holes. The clamping-type fixture (221) includes two clamping plates (2211). Locking mechanisms (2212) are provided at the upper and lower ends of the two clamping plates (2211) respectively. The distance between the two clamping plates (2211) can be adjusted by adjusting the tightness of the locking mechanisms (2212).

4. The geocell electric tensioning device according to claim 1, wherein, A traveling mechanism (111) is provided at the bottom of the control base (11). The traveling mechanism (111) includes rollers and a steering bracket.

5. The geocell electric tensioning device according to claim 1, characterized in that, The fixing member A, the fixing member B, and the fixing member C are all fixing holes (6). A fixing rod and / or an anchor rod (4) can be inserted into the fixing holes (6).

6. The geocell electric tensioning device according to claim 1, characterized in that, When the hanging net mechanism B (22) includes a plurality of sleeves (223) with different pipe diameters, equal-diameter round holes (224) are provided at the end heads of the sleeves (223), and they are connected by inserting fixing rods into the round holes (224).

7. A construction method of geocell using the geocell electric tensioning device according to any one of claims 1-6, characterized in that, It includes the following steps; S1: Determine the laying area; S2: Insert the anchor rod (4) at the starting section of the laying area; S3: Pre-connect the geocell (7). Open the geocell (7) product to be tensioned, and place the geocells (7) in sequence along the laying length direction. Use special geocell connectors to pre-connect multiple geocells; S4: Lay the electric tensioning device, specifically including: S41: Distribute and fix the hanging net mechanism A (21) on both sides of the laying area. That is, the distribution direction of the hanging net mechanism A (21) is perpendicular to the starting section of the laying area. At the same time, determine the number of sliders (213) installed on the hanging net mechanism A (21) according to the specification size of the tensioned geocell (7); S42: Move both the tensioning telescopic mechanism (1) and the hanging net mechanism B (22) to the tensioning side of the laying area. Then adjust the lengths of the hydraulic telescopic arms in the hanging net mechanism B (22) and the tensioning telescopic mechanism (1) respectively according to the laying area. Finally, connect both ends of the hanging net mechanism B (22) to the corresponding side of the hanging net mechanism A (21) through the fixing member C; Connect the end of the hydraulic telescopic arm to the fixing member B on the corresponding side of the hanging net mechanism A (21) through the fixing member A. At the same time, connect the hanging net mechanism B (22) and the winch (13) through the pulling rope (3) and the fixing buckle (222); S5: Hang the geocell (7), specifically including: Hang the hanging points of the geocell (7) in sequence on the anchor rod (4) that has been driven at the starting section in the width direction. The hanging points of the geocells (7) on both sides are sequentially clamped on the geocell fixing fixtures on the sliders (213) of the hanging net mechanism A (21). Clamp the hanging points on the tensioning side of the geocell (7) on the geocell fixing fixtures of the hanging net mechanism B (22) in sequence; S6: Tension the geocell (7), specifically including: Connect the power supply of the winch (13), and contract the pulling rope (3) through the winch (13) so that the geocell (7) is fully tensioned and in a tensioned state; S7: Fix the geocell (7), specifically including: if no further laying is required, use the anchor bolts (4) to fix the hanging points on both sides and the tension side of the geocell (7) in place. At the same time, remove the mesh hanging mechanism A (21), the mesh hanging mechanism B (22) and the tensioning and telescoping mechanism (1). After completing the above operations, proceed to step S9; if continuous laying is still required, use the anchor bolts (4) to fix the hanging points on both sides of the geocell (7) in place, and do not fix the tension side. At the same time, remove the mesh hanging mechanism A (21), the mesh hanging mechanism B (22) and the tensioning and telescoping mechanism (1). After completing the above operations, proceed to step S8; S8: Repeat steps S3 - S7 again to complete the continuous tensioning, laying and fixing of the geocell (7); S9: Inspection of the laying area: After laying, check that the geocell (7) in the laying area is fully unfolded and in a tensioned state, check that the fixed anchor bolts (4) are in an effective fixed state and the connection between the geocell (7) groups is firm. After all inspections are completed, prepare for subsequent filling and compaction.

8. The construction method of the geocell according to claim 7, characterized in that, In step S6, a tensiometer (52) is provided on the pulling rope (3) between the winch (13) and the mesh hanging mechanism B (22). When the tensiometer (52) reaches the tension threshold, the geocell (7) is fully tensioned and in a tensioned state. Among them, the tension threshold of the tensiometer (52) is calculated by cumulative superposition according to the hanging points on the mesh hanging mechanism B (22).

9. The construction method of the geocell according to claim 7 or 8, characterized in that, In step S2, take the wide-width end on one side of the laying area as the starting section, start driving the anchor bolts (4) along the starting point according to the diagonal distance of the geocell (7) mesh size, and lay down the anchor bolts (4) in sequence according to the mesh size of the geocell (7) to be laid this time. The anchor bolts (4) are required to be more than 10 cm above the laying surface, and the depth of the anchor bolts (4) buried in the ground is 30 cm - 40 cm.

10. The construction method of the geocell according to claim 7 or 8, characterized in that, In step S41, one end of the mesh hanging mechanism A (21) close to the starting section of the laying area is fixed by the anchor bolt (4).

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