A protection structure for soft foundation slope in high-cold and rainy area and a construction method thereof

Abstract

The application relates to the technical field of building engineering, in particular to a protection structure of a soft foundation slope in an alpine and rainy area and a construction method thereof, which comprises a drainage body, a wall body foundation and a gabion wall. A blind ditch is arranged in a slope body, the blind ditch is used for containing the drainage body, the drainage body is used for draining water in a frozen soil layer of the slope body, the drainage body comprises, in sequence along a ditch bottom direction away from the blind ditch, a groove-shaped concrete cushion layer, a gravel layer, a sand and gravel layer and an insulation layer, and the concrete cushion layer is located in a region below a freezing and thawing line; a foundation pit is arranged on one side of the soft foundation close to the slope body, the foundation pit is used for containing the wall body foundation, and the wall body foundation is used for supporting the gabion wall; the gabion wall is composed of a plurality of gabions, the plurality of gabions are staggered from bottom to top along a slope surface of the slope body, and the gabion wall covers the drainage body. In the application, the sliding and collapsing risk of the soft foundation slope can be greatly reduced, the stability of the soft foundation slope can be improved, and the overall engineering quality can be improved through the cooperation of the drainage body and the gabion wall.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering, in particular to a protection structure for soft foundation slope in alpine and rainy area and a construction method thereof. BACKGROUND

[0002] In the alpine and rainy area of Qinghai-Tibet Plateau, permafrost is widely distributed. When a road is built in the alpine and rainy area, the roadbed of the road is often excavated on the permafrost area, and the slope on both sides of the road is often trimmed to improve the stability of the road slope.

[0003] Permafrost is a kind of soil that is very sensitive to changes in ground temperature. The freeze-thaw damage of permafrost makes the stability of the slope in the permafrost area worse than that of a general slope, thereby affecting the safety of the road and the maintenance cost in the later period. In addition, after the surface layer of the roadbed is excavated, the base melts quickly under the influence of air temperature, thereby forming a soft foundation, which will increase the risk of slope collapse.

[0004] Due to the large temperature difference between winter and summer, the rear edge position of the slope produces permafrost phenomenon in winter. Frost heaving is a kind of extrusion loading to the lower slope, which increases the sliding force of the lower slope. After the ground temperature rises in summer, the permafrost in the slope begins to thaw, the underground ice in the permafrost melts, and the melted water moves downward, increasing the water content of the lower slope and raising the groundwater level, so that part of the slope and part of the soil transition from unsaturated to saturated state, thereby reducing the anti-sliding force of the slope and decreasing the stability of the slope. Since the rear edge of the slope undergoes periodic freezing and thawing with the fluctuation of air temperature every year, the periodic repeated loading will eventually cause the overall slope of the slope, so that the slope collapses.

[0005] In the prior art, a longitudinal gravel blind ditch can be arranged on the slope to drain the water in the slope, and the water in the slope is guided to the road surface and then drained through other ditches. However, the water in the gravel blind ditch is prone to freezing, thereby affecting the drainage performance of the gravel blind ditch and increasing the risk of slope collapse. SUMMARY

[0006] In order to improve the stability of the soft foundation slope, the present application provides a protection structure for soft foundation slope in alpine and rainy area and a construction method thereof.

[0007] The protection structure for soft foundation slope in alpine and rainy area and the construction method thereof provided by the present application adopt the following technical solutions:

[0008] A protection structure for soft foundation slope in alpine and rainy area, wherein the slope body is located on the side of the soft foundation.

[0009] The slope body is provided with a blind ditch, the blind ditch is used for accommodating the drainage body, the drainage body is used for draining water in the frozen soil layer of the slope body, the drainage body comprises, in sequence along the direction away from the ditch bottom of the blind ditch, a groove-shaped concrete cushion layer, a gravel layer, a sand and gravel layer and an insulation layer, and the concrete cushion layer is located in the area below the freezing and thawing line; the soft foundation is provided with a foundation pit on the side close to the slope body, the foundation pit is used for accommodating the wall body foundation, and the wall body foundation is used for supporting the stone gabion wall; the stone gabion wall is composed of a plurality of stone gabions, and the plurality of stone gabions are staggered from bottom to top along the slope surface of the slope body, and the stone gabion wall covers the drainage body.

[0010] By adopting the technical scheme, the insulation layer is arranged above the drainage body, the influence of external temperature on the internal structure of the drainage body is reduced, the internal temperature of the drainage body is kept high, the risk of water freezing in the gravel layer is reduced in a low-temperature environment, and the gravel layer keeps a flow channel for the flowing water.

[0011] The stone gabion wall has a large self-weight, and can resist the sliding force of the slope body, so as to further reduce the risk of collapse of the slope body. Meanwhile, the stone gabion wall can also drain the melted water in the slope body, so as to reduce the water content at the bottom of the slope body and reduce the risk of collapse of the slope body.

[0012] In summary, through the cooperation of the drainage body and the stone gabion wall, the risk of collapse of the soft foundation slope can be greatly reduced, the stability of the soft foundation slope can be improved, and the overall engineering quality can be improved.

[0013] Optionally, the insulation layer comprises foamed concrete and a reinforcing body, and the reinforcing body is embedded in the foamed concrete.

[0014] By adopting the technical scheme, the heat transfer path in the foamed concrete is greatly lengthened, so that the foamed concrete has good heat insulation performance. Meanwhile, the reinforcing body is embedded in the insulation layer, and the reinforcing body is integrally formed with the foamed concrete, so that the structural strength and continuity of the insulation layer are improved, and the influence of the stone gabion wall on the insulation layer is reduced.

[0015] Optionally, the blind ditch comprises a longitudinal blind ditch and a transverse blind ditch, the longitudinal blind ditch is located on a vertical plane, and the transverse blind ditch is located on a horizontal plane; correspondingly, the drainage body comprises a longitudinal drainage body and a transverse drainage body, the longitudinal drainage body is arranged in the longitudinal blind ditch, and the transverse drainage body is arranged in the transverse blind ditch.

[0016] By adopting the technical scheme, the longitudinal drainage body is the main drainage channel of the slope body, the transverse drainage body is additionally arranged to assist in drainage, the downward infiltration of the melted water in the slope body is reduced, the risk of collapse of the slope body is further reduced, and the stability of the soft foundation slope is improved.

[0017] A construction method of a protection structure of a soft foundation slope in an alpine and rainy area, comprising the following steps:

[0018] Slope construction: trimming the slope body on both sides of the soft foundation, excavating a blind ditch on the slope surface of the slope body, and the ditch bottom of the blind ditch is lower than the freezing-thawing line of the area;

[0019] Drainage body construction: after the ditch bottom of the blind ditch is rammed, a concrete cushion, a gravel layer, a sand and gravel layer, and a thermal insulation layer are sequentially laid; after the foamed concrete of the thermal insulation layer is poured, a vibrating device is used to vibrate the foamed concrete along the slope surface from bottom to top, and the bottom of the gravel layer is lower than the freezing-thawing line of the area;

[0020] Wall foundation construction: excavating a foundation pit on the side of the soft foundation close to the slope body, filling stones into the foundation pit, and pouring concrete to form a wall foundation in the foundation pit;

[0021] Gabion wall construction: a plurality of gabbions are staggered and arranged along the slope surface of the slope body from bottom to top, and the gabion wall covers the drainage body.

[0022] Optionally, the vibrating device comprises a rack, a first vibrating assembly, a first driving assembly, and a second driving assembly; the rack is used to move along the length direction of the blind ditch; the first vibrating assembly comprises a first sliding rod, a first pressing plate, and a first magnet piece, the first sliding rod is in sliding connection with the rack, one side of the first pressing plate is provided with a first plug-in slot body, the first sliding rod is arranged in the first plug-in slot body, the first plug-in slot body and the first sliding rod are connected through a bolt and a nut, and a clearance is arranged between the slot side wall of the first plug-in slot body and the first sliding rod, and the first magnet piece is fixedly arranged on the side of the first pressing plate close to the first sliding rod; the first driving assembly is used to drive the first vibrating assembly to slide, so that the first pressing plate collides with the foamed concrete; the second driving assembly comprises a rotating motor and a driving magnet piece, the rotating motor is fixedly arranged on the rack, and the driving magnet piece is fixedly arranged on the driving end of the rotating motor; the second driving assembly is used to force the first pressing plate to reciprocating vibrate.

[0023] By adopting the above technical scheme, the first driving assembly lifts the first pressing plate, and after the first pressing plate falls, the first pressing plate has an impact on the surface of the foamed concrete. The impact vibration of the first pressing plate on the foamed concrete breaks the aggregation state of the bubbles in the foamed concrete and separates the connected gas channels into a plurality of closed bubbles, so that the bubbles are uniformly distributed in the bottom area of the foamed concrete, thereby improving the thermal insulation performance of the thermal insulation layer. On the other hand, the first pressing plate strikes and presses the surface of the foamed concrete, so that the bubbles in the upper area of the foamed concrete escape and break, thereby improving the compactness of the upper area of the foamed concrete.

[0024] When the first pressing plate strikes the foam concrete, the motor in the second driving assembly drives the magnet member to rotate, so that the first magnet member and the driving magnet member alternately generate attractive force and repulsive force, thereby making the first pressing plate make reciprocating linear motion on the surface of the foam concrete, so that the first pressing plate vibrates and levels the foam concrete on the plane. That is, the first pressing plate drives the particles in the surface layer of the foam concrete to vibrate, so as to close the open pores and flow channels in the foam concrete, thereby further improving the heat preservation performance of the thermal insulation layer.

[0025] Optionally, the vibrating device further comprises two groups of second vibrating assemblies arranged on the two sides of the first vibrating assembly along the advancing direction of the rack; each second vibrating assembly comprises a second sliding rod, a second pressing plate and a second magnet member; the second sliding rod is slidably connected to the rack and has the same sliding direction as the first sliding rod; the second pressing plate is provided with a second insertion slot on one side thereof, and the end of the second sliding rod is arranged in the second insertion slot; the second insertion slot and the second sliding rod are connected by bolts and nuts, and a clearance is arranged between the slot side wall of the second insertion slot and the second sliding rod; the second magnet member is fixedly arranged on the side of the second pressing plate close to the second sliding rod; the side of the first pressing plate close to the second pressing plate is provided with a limiting protrusion, and the second pressing plate is provided with a limiting groove; along the sliding direction of the first sliding rod, a clearance is arranged between the limiting protrusion and the slot side wall of the limiting groove; the second pressing plate is used for colliding with the foam concrete; the second magnet member is fixedly arranged on the side of the second pressing plate close to the second sliding rod, and the driving magnet member is used for forcing the second magnet member and the second pressing plate to make reciprocating vibration.

[0026] By adopting the above technical scheme, the first pressing plate and the second pressing plate have different rising or falling distances, so that the impact forces of the first pressing plate and the second pressing plate on the foam concrete are different. Therefore, as the vibrating device moves, the foam concrete can be subjected to light, heavy and light impacts of different intensities; so as to further improve the compactness of the foam concrete, and improve the proportion of closed pores and connected channels in the foam concrete, thereby further improving the heat preservation performance of the thermal insulation layer.

[0027] Optionally, along the sliding direction of the first sliding rod, the two sides of the limiting protrusion are provided with first racks, and the slot side walls on the two sides of the limiting groove are provided with second racks; the first racks are used for engaging with the second racks.

[0028] By adopting the technical scheme, the first pressing plate and the second pressing plate are set to reciprocate, the first pressing plate and the second pressing plate have vertical movement, and the first pressing plate and the second pressing plate continuously pat the foam concrete, so that the amount of the closed bubbles in the foam concrete is further increased, and the heat preservation performance of the heat preservation layer is further improved.

[0029] Optionally, the vibrating device further comprises a third vibrating assembly, the third vibrating assembly is fixedly arranged on the frame, and the third vibrating assembly is arranged in front of the first vibrating assembly in the advancing direction of the first vibrating assembly; the third vibrating assembly comprises a third linear reciprocating driving member, a third pressing plate, a vibrating motor and a vibrating rod, the vibrating motor and the vibrating rod are fixedly arranged on both sides of the third pressing plate, the third linear reciprocating driving member is fixedly arranged on the frame, the driving end of the third linear reciprocating driving member is connected with the third pressing plate, and the third linear reciprocating driving member drives the vibrating rod to be inserted into the foam concrete.

[0030] By adopting the technical scheme, the third vibrating assembly is used to vibrate the foam concrete, so that the construction steps are reduced, and the working intensity of the workers is reduced.

[0031] Optionally, the vibrating rod is provided with a storage groove, and the groove bottom wall of the vibrating rod is provided with a discharge port; the vibrating device further comprises a filling assembly, the filling assembly comprises a filling rod, a hopper, a conveying pipe and a counterweight; the filling rod is arranged in the storage groove, the filling rod penetrates through the discharge port, the hopper is fixedly arranged on the frame, the hopper is used to store EPS particles, one end of the conveying pipe is connected with the hopper, the other end of the conveying pipe is arranged in the storage groove, and the counterweight is fixedly arranged on the side of the filling rod away from the ground; when the counterweight abuts against the vibrating rod, the filling rod blocks the discharge port, the outer periphery of the filling rod is provided with a through gap, the through gap is arranged at the end of the filling rod away from the counterweight, and when the counterweight is separated from the vibrating rod, the through gap penetrates through the discharge port, and the EPS particles penetrate through the through gap and the discharge port in sequence.

[0032] By adopting the technical scheme, when the vibrating rod is inserted into the foam concrete, the through gap of the filling rod penetrates through the discharge port; thus, the EPS particles in the storage groove can fall into the foam concrete around the vibrating rod through the through gap and the discharge port in sequence. When the vibrating rod vibrates the foam concrete, the EPS particles in the foam concrete can spread around the vibrating rod to supplement the foam concrete around the vibrating rod.

[0033] Optionally, the vibrating device further comprises a fourth vibrating assembly, the fourth vibrating assembly is fixedly arranged behind the first vibrating assembly in the running direction of the first vibrating assembly; the fourth vibrating assembly comprises a fourth sliding rod and a fourth pressing plate, the fourth sliding rod is slidably connected with the frame, and the fourth pressing plate is fixedly connected with the end of the first sliding rod, and the fourth pressing plate is used for scraping the foam concrete.

[0034] By adopting the technical scheme, the fourth vibrating assembly is used for scraping the foam concrete, so that the smoothness of the surface of the foam concrete is improved.

[0035] In summary, the present application has at least one of the following beneficial technical effects:

[0036] 1. The heat preservation layer is arranged above the drainage body, so that the influence of external temperature on the internal structure of the drainage body is reduced, the internal temperature of the drainage body is kept high, the risk of water freezing in the gravel layer is reduced in a low-temperature environment, the gravel layer has a flow channel for the flowing of melted water, the drainage body can timely drain the liquid water melted from the frozen soil layer, the infiltration of the melted water is reduced, the sliding risk of the lower part of the slope body is reduced, and the stability of the soft foundation slope is improved;

[0037] 2. On one hand, the first pressing plate is used for patting the foam concrete, the internal impact vibration of the foam concrete can break the aggregation state of the bubbles and separate the connected gas channels into a plurality of closed bubbles, so that the bubbles are uniformly distributed in the bottom region of the foam concrete, and the heat preservation performance of the heat preservation layer is improved;

[0038] 3. The first pressing plate and the second pressing plate have different rising or falling distances, so that the impact forces of the first pressing plate and the second pressing plate on the foam concrete are different. Therefore, the foam concrete can be patted at three different intensities of light, heavy and light in turn with the movement of the vibrating device, so that the density of the foam concrete is further improved, and the proportion of the closed pores and channels in the foam concrete is further improved, and the heat preservation performance of the heat preservation layer is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a schematic view of the protection structure in embodiment 1.

[0040] Figure 2 is a sectional view of the protection structure in embodiment 1.

[0041] Figure 3 is a sectional view of the drainage body structure in embodiment 1.

[0042] Figure 4 is a schematic view of the first state of the vibrating device in embodiment 2.

[0043] Figure 5is a schematic diagram embodying the first state of the vibrating device in embodiment 2.

[0044] Figure 6 is Figure 5 is a close-up view of area A in

[0045] Figure 7 is a schematic diagram embodying the first state of the vibrating device in embodiment 3.

[0046] Figure 8 is Figure 7 is a close-up view of area B in

[0047] Figure 9 is Figure 7 is a close-up view of area C in

[0048] Figure 10 is a schematic diagram embodying the second state of the vibrating device in embodiment 3.

[0049] Figure 11 is Figure 10 is a close-up view of area D in

[0050] Figure 12 is Figure 11 is a close-up view of area E in

[0051] Figure 13 is a schematic diagram embodying the first state of the filling assembly in embodiment 4.

[0052] Figure 14 is Figure 13 is a close-up view of area F in

[0053] Figure 15 is a schematic diagram embodying the first state of the filling assembly in embodiment 4.

[0054] Figure 16 is a schematic diagram embodying the second state of the filling assembly in embodiment 4.

[0055] Figure 17 is Figure 16 is a close-up view of area G in

[0056] Explanation of reference signs: 1, slope body; 101, blind ditch; 102, freeze-thaw line; 111, longitudinal blind ditch; 112, transverse blind ditch; 2, soft foundation; 21, foundation pit; 3, drainage body; 31, longitudinal drainage body; 32, transverse drainage body; 33, concrete cushion layer; 34, gravel layer; 35, sand and gravel layer; 36, insulation layer; 361, foamed concrete; 362, reinforcing body; 363, EPS particles; 4, wall foundation; 5, gabion wall; 6, rack; 61, first sleeve; 62, second sleeve; 63, third sleeve; 64, fourth sleeve; 65, roller; 7, first vibrating assembly; 71, first sliding rod; 72, first pressing plate; 721, first plug-in groove body; 722, limiting protrusion; 723, first rack; 73, first magnet piece; 8, first driving assembly; 81, winch; 82, traction rope; 9, second driving assembly; 91, rotating motor; 92, driving magnet piece; 12, second vibrating assembly; 121, second sliding rod; 122, second pressing plate; 1221, second plug-in groove body; 1222, limiting groove; 1223, second rack; 123, second magnet piece; 13, third vibrating assembly; 131, third linear reciprocating driving piece; 132, third sliding rod; 133, third pressing plate; 134, vibrating motor; 135, vibrating rod; 1351, storage tank; 1352, discharge port; 14, fourth vibrating assembly; 141, fourth linear reciprocating driving piece; 142, fourth sliding rod; 143, fourth pressing plate; 15, channel steel; 16, filling assembly; 161, hopper; 162, material conveying pipe; 163, filling rod; 1631, through gap; 164, counterweight. DETAILED DESCRIPTION

[0057] The following will be described in detail below with reference to the accompanying drawings. Figure 1 Further detailed description of the present application is given below.

[0058] The embodiment of the present application discloses a protection structure of soft foundation slope in high-cold and rainy area, and the slope body 1 is located at the side of the soft foundation 2. Figure 1 And Figure 2 The protection structure of soft foundation slope in high-cold and rainy area comprises a drainage body 3, a wall foundation 4 and a gabion wall 5.

[0059] Referring to Figure 1 And Figure 2, the slope body 1 is provided with a blind ditch 101, the blind ditch 101 is used for accommodating a drainage body 3, the drainage body 3 is used for draining water in the frozen soil layer of the slope body 1. The blind ditch 101 includes a longitudinal blind ditch 111 and a transverse blind ditch 112, the longitudinal blind ditch 111 is located on a vertical plane, and the transverse blind ditch 112 is located on a horizontal plane; correspondingly, the drainage body 3 includes a longitudinal drainage body 31 and a transverse drainage body 32, the longitudinal drainage body 31 is arranged in the longitudinal blind ditch 111, and the transverse drainage body 32 is arranged in the transverse blind ditch 112. In the embodiment, the blind ditch 101 is a trapezoidal section; and in other embodiments, the blind ditch 101 can also be a rectangular section.

[0060] With reference to Figure 1 And Figure 2 , the transverse blind ditch 112 has a drainage effect on the water in the slope body 1, and the transverse blind ditch 112 drains the water in the slope body 1 into the longitudinal blind ditch 111. The longitudinal blind ditch 111 is connected with a natural ditch or an artificial ditch to drain the water in the slope body 1.

[0061] With reference to Figure 3 , the longitudinal drainage body 31 is consistent in structure with the transverse drainage body 32, and the specific structure of the drainage body 3 will be described by taking the longitudinal drainage body 31 as an example. Along the direction away from the ditch bottom of the longitudinal blind ditch 111, the longitudinal drainage body 31 includes a groove-shaped concrete cushion layer 33, a gravel layer 34, a sand and gravel layer 35 and a heat preservation layer 36 in sequence. Among them, the concrete cushion layer 33 is located in the area below the freezing and thawing line 102. First, the melting water in the frozen soil layer of the slope body 1 flows to the gravel layer 34; then, the melting water flows from the gravel layer 34 to the concrete cushion layer 33, and finally, the melting water flows along the groove bottom wall of the concrete cushion layer 33, so that the melting water in the slope body 1 flows out of the slope body 1.

[0062] With reference to Figure 3 In the embodiment, the heat preservation layer 36 includes a foamed concrete 361 and a reinforcing body 362, and the reinforcing body 362 is embedded in the foamed concrete 361; that is, in the embodiment, the foamed concrete 361 in the heat preservation layer 36 is cast-in-place to improve the overall height of the longitudinal drainage body 31. And in other embodiments, the heat preservation layer 36 can also be spliced and laid by prefabricated foamed concrete 361 plates.

[0063] With reference to Figure 3 The foamed concrete 361 is a material mixed by EPS particles 363 (polystyrene particles) and concrete, and the EPS particles 363 (polystyrene particles) are a kind of light and closed-cell structure material with low thermal conductivity. When the EPS particles 363 (polystyrene particles) are mixed into the concrete, they form a large number of micro air chambers in the concrete, and the static air is a poor conductor of heat, which can effectively prevent the transfer of heat.

[0064] In the foamed concrete 361, heat must bypass the air chamber formed by the EPS particles 363 (polystyrene particles), which increases the path length of heat conduction, thereby reducing the heat conduction efficiency. Therefore, in the foamed concrete 361, the heat transfer path is greatly lengthened; so that the foamed concrete 361 has good heat preservation performance. At the same time, the steel body 362 is embedded in the thermal insulation layer 36, and the steel body 362 is integrally formed with the foamed concrete 361; thereby improving the structural strength and continuity of the thermal insulation layer 36, to reduce the influence of the gabion wall 5 on the thermal insulation layer 36.

[0065] With reference to Figure 2 , the soft foundation 2 is provided with a foundation pit 21 near one side of the slope body 1, and the foundation pit 21 is used to accommodate the wall foundation 4, and the wall foundation 4 is used to support the gabion wall 5. In this embodiment, the wall foundation 4 is formed by pouring gravel and concrete.

[0066] With reference to Figure 2 , the gabion wall 5 is composed of a plurality of gabions, and the plurality of gabions are arranged staggered from bottom to top along the slope surface of the slope body 1, and the gabion wall 5 covers the drainage body 3.

[0067] The implementation principle of the soft foundation slope protection structure in the high-cold and rainy area according to the embodiment of the present application is:

[0068] With reference to Figure 2 and Figure 3 , the groove-shaped concrete cushion layer 33 in the drainage body 3 is located in the area below the freezing-thawing line 102, so that the bottom of the gravel layer 34 is also located below the freezing-thawing line 102, reducing the risk of water freezing at the bottom of the gravel layer 34, so that the gravel layer 34 retains a flow channel for liquid water to flow, so that the drainage body 3 can timely drain the liquid water melted from the frozen soil layer, reduce the infiltration of the melted water, reduce the risk of collapse of the lower part of the slope body 1, and improve the stability of the soft foundation 2 slope.

[0069] At the same time, after the gravel layer 34 is laid, the gravel layer 35 should be laid on the gravel layer 34 in time to avoid the external temperature disturbing the stable form of the soil in the slope body 1.

[0070] The thermal insulation layer 36 is arranged above the drainage body 3 to reduce the influence of the external temperature on the internal structure of the drainage body 3, so that the internal structure of the drainage body 3 maintains a relatively high temperature; thereby reducing the risk of water freezing in the gravel layer 34 in a low-temperature environment, so that the gravel layer 34 retains a flow channel for the melted water to flow. At the same time, the thermal insulation layer 36 also reduces the amplitude of the temperature change of the frozen soil on both sides of the drainage body 3, reduces the freeze-thaw damage of the frozen soil on both sides of the drainage body 3, so as to facilitate the flow of the melted water in the frozen soil layer in the slope body 1 to the drainage body 3.

[0071] The stone cage wall 5 has a large self-weight, and can resist the sliding force of the slope body 1, so as to further reduce the risk of collapse of the slope body 1. Meanwhile, the stone cage wall 5 covers the drainage body 3, has a heat preservation effect on the drainage body 3, and can make the melted water in the slope body 1 drain out, so as to reduce the water content at the bottom of the slope body 1 and reduce the risk of collapse of the slope body 1.

[0072] In summary: through the cooperation of the drainage body 3 and the stone cage wall 5, the risk of collapse of the soft foundation 2 slope can be greatly reduced, the stability of the soft foundation 2 slope can be improved, and the overall engineering quality can be improved.

[0073] The stone cage wall 5 has the characteristics of light weight, easy installation, simple process and strong adaptability, which can reduce the investment cost while ensuring the stability of the slope body 1 in a high-temperature and rainy environment. The flexible construction advantage of the stone cage wall 5 reduces the labor, equipment rental and other indirect cost expenditures caused by long-time construction without limiting the construction period due to safety considerations in the high-cold and rainy season.

[0074] Embodiment 2

[0075] The embodiment 2 discloses a construction method of the protection structure of the soft foundation slope in the high-cold and rainy area in the embodiment 1, and the construction method comprises the following steps:

[0076] Slope body 1 construction: refer to Figure 1 and Figure 2 , the slope body 1 on both sides of the soft foundation 2 is modified, a blind ditch 101 is excavated on the slope surface of the slope body 1, and the ditch bottom of the blind ditch 101 is lower than the freezing-thawing line 102 of the area.

[0077] Drainage body 3 construction: refer to Figure 2 and Figure 3 , after the ditch bottom of the blind ditch 101 is rammed, the concrete cushion layer 33, the gravel layer 34, the sand and gravel layer 35 and the heat preservation layer 36 are sequentially laid; after the foamed concrete 361 of the heat preservation layer 36 is poured, the foamed concrete 361 is vibrated by using a vibrating device along the direction from the bottom to the top of the slope surface, and the bottom of the gravel layer 34 is lower than the freezing-thawing line 102 of the area.

[0078] Wall body foundation 4 construction: refer to Figure 2 , a foundation pit 21 is excavated on the side of the soft foundation 2 close to the slope body 1, and the stone blocks are filled into the foundation pit 21 and the concrete is poured, so as to form the wall body foundation 4 in the foundation pit 21.

[0079] Stone cage wall 5 construction: refer to Figure 2 , a plurality of stone cages are staggered and arranged along the slope surface of the slope body 1 from the bottom to the top, and the stone cage wall 5 covers the drainage body 3.

[0080] Refer to 4 and Figure 5In the embodiment, the vibrating device comprises a frame 6, a first vibrating assembly 7, a first driving assembly 8 and a second driving assembly 9. The bottom of the frame 6 is provided with a rolling wheel 65, and the frame 6 is used to move along the length direction of the blind ditch 101. In the embodiment, the slope body 1 is provided with a channel steel 15, and the channel steel 15 is located on both sides of the longitudinal blind ditch 111; the rolling wheel 65 at the bottom of the frame 6 is arranged on the channel steel 15, and the channel steel 15 has a guiding effect on the frame 6. A winding machine can be installed on the slope body 1 by a worker, and the vibrating device is pulled by the winding machine to move on the channel steel 15.

[0081] With reference to Figure 5 and Figure 6 , the first vibrating assembly 7 comprises a first sliding rod 71, a first pressing plate 72 and a first magnet 73. The first sliding rod 71 is in sliding connection with the frame 6, and the frame 6 is provided with a first sleeve 61 for the first sliding rod 71 to pass through. The first pressing plate 72 is provided with a first insertion slot 721 on one side, and the end of the first sliding rod 71 is arranged in the first insertion slot 721. The first insertion slot 721 is connected with the first sliding rod 71 through a bolt and a nut, and an avoiding distance is arranged between the slot side wall of the first insertion slot 721 and the first sliding rod 71. The first magnet 73 is fixedly arranged on the side of the first pressing plate 72 close to the first sliding rod 71.

[0082] With reference to Figure 4 and Figure 5 , the first driving assembly 8 is used to drive the first vibrating assembly 7 to slide, so that the first pressing plate 72 collides with the foam concrete 361. In the embodiment, the first driving assembly 8 comprises a winch 81 and a traction rope 82. The winch 81 is fixedly arranged on the frame 6, one end of the traction rope 82 is fixedly connected with the winch 81, and the other end of the traction rope 82 is fixedly connected with the first sliding rod 71. Thus, through winding and unwinding of the winch 81, the first vibrating assembly 7 makes linear reciprocating motion. The winch 81 lifts the first pressing plate 72 to a certain height, and then the winch 81 is unwound; the first pressing plate 72 falls under the action of gravity and collides with the foam concrete 361. The first pressing plate 72 has a compacting effect on the foam concrete 361.

[0083] With reference to Figure 5 and Figure 6 , the second driving assembly 9 comprises a rotating motor 91 and a driving magnet 92. The rotating motor 91 is fixedly arranged on the frame 6, and the driving magnet 92 is fixedly arranged on the driving end of the rotating motor 91. The rotating motor 91 drives the driving magnet 92 to rotate, so that the N pole and the S pole of the driving magnet 92 alternately interact with the first magnet 73; that is, the second driving assembly 9 alternately applies repulsive force and attractive force to the first magnet 73, so as to force the first pressing plate 72 to make small-distance reciprocating motion on the surface of the foam concrete 361.

[0084] The implementation principle of the construction method of the protection structure of the soft foundation slope in the high-cold and rainy area according to the embodiment of the application is as follows:

[0085] Referring to Figure 4 and Figure 5 , along the length direction of the foam concrete 361, the vibrating device advances by a distance of the first pressing plate 72 each time, and the vibrating device is used for vibrating and compacting the foam concrete 361.

[0086] Referring to 4 and Figure 5 , the first driving assembly 8 lifts the first pressing plate 72, and after the first pressing plate 72 falls, the first pressing plate 72 has an impact effect on the surface of the foam concrete 361. On the one hand, the first pressing plate 72 strikes and presses the foam concrete 361, and the impact vibration in the foam concrete 361 can break the aggregation state of the bubbles and separate the connected gas channels into a plurality of closed bubbles, so that the bubbles are uniformly distributed in the bottom region of the foam concrete 361, to improve the heat preservation performance of the heat preservation layer 36. On the other hand, the first pressing plate 72 strikes the surface of the foam concrete 361, so that the bubbles in the upper region of the foam concrete 361 escape and break, to improve the density of the upper region of the foam concrete 361.

[0087] Referring to Figure 5 and Figure 6 , when the first pressing plate 72 strikes the foam concrete 361, the motor in the second driving assembly 9 drives the magnet piece to rotate, so that the first magnet piece 73 and the driving magnet piece 92 alternately generate attractive force and repulsive force, so that the first pressing plate 72 makes reciprocating linear motion on the surface of the foam concrete 361, so that the first pressing plate 72 vibrates and levels the foam concrete 361 on the plane. That is, the reciprocating vibration of the first pressing plate 72 is used to remove the excess bubbles on the surface of the foam concrete 361, to improve the flatness and smoothness of the surface of the foam concrete 361; and the first pressing plate 72 drives the particles in the surface layer of the foam concrete 361 to vibrate, to close the open pores and flow channels in the foam concrete 361, so as to further improve the heat preservation performance of the heat preservation layer 36.

[0088] Referring to Figure 5 and Figure 6 , when the first pressing plate 72 is separated from the foam concrete 361, the second driving assembly 9 makes the first pressing plate 72 make reciprocating motion along the surface of the foam concrete 361, to reduce the occurrence of the situation that the surface of the foam concrete 361 is pulled out, so that the first pressing plate 72 is stably separated from the foam concrete 361.

[0089] Embodiment 3

[0090] The embodiment 3 discloses a construction method of a protection structure of a soft foundation slope in a high-cold and rainy area, and the difference between the embodiment 3 and the embodiment 2 is as follows:

[0091] With reference to Figure 7 and Figure 8 , the vibrating device further comprises a second vibrating assembly 12, a third vibrating assembly 13 and a fourth vibrating assembly 14, and the second vibrating assembly 12 is provided with two. In the advancing direction of the vibrating device, the vibrating device comprises the third vibrating assembly 13, the second vibrating assembly 12, the first vibrating assembly 7, the second vibrating assembly 12 and the fourth vibrating assembly 14 in sequence.

[0092] With reference to Figure 7 and Figure 8 , the third vibrating assembly 13 comprises a third linear reciprocating driving member 131, a third sliding rod 132, a third pressing plate 133, a vibrating motor 134 and a vibrating rod 135. The vibrating motor 134 and the vibrating rod 135 are fixed on both sides of the third pressing plate 133, the third linear reciprocating driving member 131 is fixed on the frame 6, and the third linear reciprocating driving member 131 is connected with the third pressing plate 133 through the third sliding rod 132. The frame 6 is provided with a third sleeve 63 for the third sliding rod 132 to pass through, and the third linear reciprocating driving member 131 drives the vibrating rod 135 to be inserted into the foam concrete 361. The third linear reciprocating driving member 131 can be a pneumatic cylinder, a hydraulic push rod and an electric push rod; in this embodiment, the third linear reciprocating driving member 131 is an electric push rod.

[0093] With reference to Figure 7 and Figure 9 , the second vibrating assembly 12 comprises a second sliding rod 121, a second pressing plate 122 and a second magnet member 123. The frame 6 is provided with a second sleeve 62 for the second sliding rod 121 to pass through, and the second sliding rod 121 is slidably connected with the frame 6, and the sliding direction of the second sliding rod 121 is consistent with that of the first sliding rod 71. The second pressing plate 122 is provided with a second insertion slot 1221 on one side, and the end of the second sliding rod 121 is arranged in the second insertion slot 1221, the second insertion slot 1221 and the second sliding rod 121 are connected through bolts and nuts, and a clearance is arranged between the slot side wall of the second insertion slot 1221 and the second sliding rod 121, so that the second insertion slot 1221 and the second sliding rod 121 can move relatively. The second magnet member 123 is fixed on the side of the second pressing plate 122 close to the second insertion slot 1221.

[0094] With reference to Figure 10 to Figure 11The first pressing plate 72 is provided with a limiting protrusion 722 on the side close to the second pressing plate 122, the second pressing plate 122 is provided with a limiting recess 1222, the limiting protrusion 722 is inserted into the limiting recess 1222, and a clearance is arranged between the limiting protrusion 722 and the groove side wall of the limiting recess 1222 along the sliding direction of the first sliding rod 71, and the second pressing plate 122 is used for colliding with the foam concrete 361; the second magnet 123 is fixed on the side of the second pressing plate 122 close to the second sliding rod 121, and the driving magnet 92 is used for forcing the second magnet 123 and the second pressing plate 122 to reciprocate.

[0095] With reference to Figure 11 to Figure 12 The two sides of the limiting protrusion 722 are provided with a first rack 723 along the sliding direction of the first sliding rod 71, and the groove side walls on the two sides of the limiting recess 1222 are provided with a second rack 1223, and the first rack 723 is used for engaging with the second rack 1223.

[0096] With reference to Figure 10 The fourth vibrating assembly 14 comprises a fourth linear reciprocating driving member 141, a fourth sliding rod 142 and a fourth pressing plate 143. The fourth sliding rod 142 is arranged in the fourth sleeve 64 of the rack 6, and the fourth sliding rod 142 is in sliding connection with the rack 6. The fourth pressing plate 143 is fixedly connected with the end of the fourth sliding rod 142. The driving end of the fourth linear reciprocating driving member 141 is connected with the first sliding rod 71. The fourth linear reciprocating driving member 141 drives the first pressing plate 72 to abut against the surface of the foam concrete 361. The fourth pressing plate 143 is used for scraping the foam concrete 361, so as to improve the smoothness of the surface of the foam concrete 361.

[0097] The implementation principle of the construction method of the protection structure of the soft foundation slope in the high-cold and rainy area according to the embodiment of the application is as follows:

[0098] With reference to Figure 7 In the embodiment, the sizes of the first pressing plate 72, the second pressing plate 122, the third pressing plate 133 and the fourth pressing plate 143 are consistent, and the vibrating device advances by the distance of one first pressing plate 72 each time. In order to facilitate subsequent description, one area of the foam concrete 361 is named as a working area, and the working area of the foam concrete 361 is subjected to the actions of the third pressing plate 133, the second pressing plate 122, the first pressing plate 72, the second pressing plate 122 and the first pressing plate 72 in sequence.

[0099] With reference to Figure 7 and Figure 8During the advancing of the vibrating device, the first vibrating assembly 7 is first located above the working area of the foam concrete 361. The vibrating rod 135 of the third vibrating assembly 13 is inserted into the foam concrete 361, and the third pressing plate 133 abuts against the surface of the foam concrete 361; thus, under the action of the vibrating motor, the third vibrating assembly 13 vibrates the foam concrete 361 to discharge the air bubbles in the foam concrete 361 and improve the compactness of the foam concrete 361.

[0100] With reference to Figure 7 Subsequently, the vibrating device advances by a distance of the first pressing plate 72, so that the second vibrating assembly 12 of the vibrating device is located in the working area of the foam concrete 361. Then, the vibrating device advances by a distance of the first pressing plate 72, so that the first vibrating assembly 7 of the vibrating device is located in the working area of the foam concrete 361. Next, the vibrating device advances by a distance of the first pressing plate 72, so that the second vibrating assembly 12 of the vibrating device is located in the working area of the foam concrete 361.

[0101] With reference to 9 and Figure 11 The first pressing plate 72 drives the second pressing plate 122 to move, and the limiting convex block 722 and the limiting recess 1222 are provided with a clearance distance; so that the first pressing plate 72 and the second pressing plate 122 do not rise or fall by the same distance. Thus, when the first pressing plate 72 and the second pressing plate 122 fall onto the foam concrete 361, the impact forces of the first pressing plate 72 and the second pressing plate 122 on the foam concrete 361 are different. Thus, with the movement of the vibrating device, the working area of the foam concrete 361 can be lightly, heavily and lightly patting in turn, so as to further improve the compactness of the foam concrete 361, and improve the proportion of the closure of the internal pores and connected channels of the foam concrete 361, so as to further improve the heat preservation performance of the thermal insulation layer 36.

[0102] With reference to Figure 11 and Figure 12 When the first pressing plate 72 and the second pressing plate 122 are linearly reciprocated on the surface of the foam concrete 361 under the action of the second driving assembly 9; in addition to the mutual engagement of the first rack 723 and the second rack 1223, the first rack 723 and the second rack 1223 can also relatively approach or relatively move away from each other, so that the first rack 723 can slide along the surface of the second rack 1223, and the first rack 723 and the first pressing plate 72 can move away from the foam concrete 361, so that the first pressing plate 72 can continuously pat the foam concrete 361, further improve the formation amount of the internal closed air bubbles in the foam concrete 361, and further improve the heat preservation performance of the thermal insulation layer 36.

[0103] Embodiment 4

[0104] In the embodiment 3, when the vibrating rod 135 vibrates the foam concrete 361, the EPS particles 363 in the foam concrete 361 have a small density, and under the action of the vibrating rod 135, the EPS particles 363 have a displacement amount away from the vibrating rod 135 and upward, so that the content of the EPS particles 363 around the vibrating rod 135 is small, thereby affecting the heat preservation performance of the foam concrete 361 in the vibrating area of the vibrating rod 135. Therefore, the construction method of the embodiment 3 is further improved in the embodiment 4.

[0105] The difference between the embodiment 4 and the embodiment 3 is that:

[0106] With reference to Figure 13 to Figure 15 , the vibrating rod 135 is provided with a storage groove 1351, and the groove bottom wall of the vibrating rod 135 is provided with a discharge port 1352; the vibrating device further comprises a filling assembly 16, and the filling assembly 16 comprises a hopper 161, a feeding pipe 162, a filling rod 163 and a counterweight 164; the filling rod 163 is arranged in the storage groove 1351, the hopper 161 is fixedly arranged on the rack 6, the hopper 161 is used for storing the EPS particles 363, one end of the feeding pipe 162 is connected with the hopper 161, the other end of the feeding pipe 162 is arranged in the storage groove 1351, the filling rod 163 is arranged in the discharge port 1352, the counterweight 164 is fixedly arranged on the side of the filling rod 163 away from the ground, and the outer periphery of the filling rod 163 is provided with a through gap 1631 arranged at the end of the filling rod 163 away from the counterweight 164.

[0107] With reference to Figure 13 to Figure 15 , the counterweight 164 abuts against the vibrating rod 135 in the normal state, and the filling rod 163 blocks the discharge port 1352, so that the EPS particles 363 are stored in the storage groove 1351.

[0108] With reference to Figure 16 to Figure 17 , when the vibrating rod 135 is inserted into the foam concrete 361, the foam concrete 361 exerts an upward force on the filling rod 163, and the filling rod 163 has an upward displacement amount, so that the through gap 1631 is arranged at the discharge port 1352. Therefore, the EPS particles 363 in the storage groove 1351 can fall into the foam concrete 361 around the vibrating rod 135 through the through gap 1631 and the discharge port 1352. Especially when the vibrating rod 135 vibrates the foam concrete 361, more EPS particles 363 will fall from the storage groove 1351 to the concrete at the bottom of the vibrating rod 135; when the vibrating rod 135 vibrates the foam concrete 361, the above-mentioned EPS foam concrete 361 will spread around the vibrating rod 135 to supplement the foam concrete 361 around the vibrating rod 135.

[0109] When the vibrating rod 135 is pulled out of the foam concrete 361, the weight 164 exerts a downward force on the filling rod 163, and the filling rod 163 moves towards the foam concrete 361, so that the outer wall of the filling rod 163 blocks the discharge port 1352.

[0110] In summary: through the cooperation of the third vibrating assembly 13 and the filling assembly 16, when the third vibrating assembly 13 vibrates the foam concrete 361, the filling assembly 16 supplements the EPS particles 363 to the foam concrete 361 around the vibrating rod 135, so as to improve the uniformity of the distribution of the EPS particles 363 in the foam concrete 361, reduce the weak area of the heat preservation performance of the foam concrete 361, and improve the overall heat preservation performance of the foam concrete 361.

[0111] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so: any equivalent changes made on the basis of the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A construction method of a protection structure of a soft foundation slope in an alpine and rainy area, characterized in that: It comprises the following steps, Slope construction: trim the slope body (1) on both sides of the soft foundation (2), and excavate a blind ditch (101) on the slope surface of the slope body (1), the bottom of the blind ditch (101) is lower than the freezing-thawing line (102) of the region; Drainage body (3) construction: after the bottom of the blind ditch (101) is rammed, a concrete cushion (33), a gravel layer (34), a sand and gravel layer (35) and a heat preservation layer (36) are successively laid; after the foamed concrete (361) of the heat preservation layer (36) is poured, the foamed concrete (361) is vibrated along the slope surface from bottom to top by using a vibrating device, and the bottom of the gravel layer (34) is lower than the freezing-thawing line (102) of the region; Wall foundation (4) construction: excavate a foundation pit (21) on the side of the soft foundation (2) close to the slope body (1), and fill stones and pour concrete into the foundation pit (21) to form a wall foundation (4) in the foundation pit (21); Construction of stone cage wall (5): a plurality of stone cages are arranged in a staggered manner along the slope surface of the slope body (1) from bottom to top, and the stone cage wall (5) covers the drainage body (3); The vibrating device comprises a rack (6), a first vibrating assembly (7), a first driving assembly (8) and a second driving assembly (9); the rack (6) is used for moving along the length direction of the blind ditch (101); the first vibrating assembly (7) comprises a first sliding rod (71), a first pressing plate (72) and a first magnet piece (73), the first sliding rod (71) is in sliding connection with the rack (6), one side of the first pressing plate (72) is provided with a first plug-in slot body (721), the end of the first sliding rod (71) is arranged in the first plug-in slot body (721), the first plug-in slot body (721) and the first sliding rod (71) are connected through a bolt and a nut, and a clearance is arranged between the slot side wall of the first plug-in slot body (721) and the first sliding rod (71), and the first magnet piece (73) is fixedly arranged on the side of the first pressing plate (72) close to the first sliding rod (71); the first driving assembly (8) is used for driving the first vibrating assembly (7) to slide, so that the first pressing plate (72) collides with the foamed concrete (361); the second driving assembly (9) comprises a rotating motor (91) and a driving magnet piece (92), the rotating motor (91) is fixedly arranged on the rack (6), and the driving magnet piece (92) is fixedly arranged on the driving end of the rotating motor (91); the second driving assembly (9) is used for forcing the first pressing plate (72) to reciprocate.

2. The construction method of the protection structure of the soft foundation slope in the alpine and rainy area according to claim 1, characterized in that: The vibrating device further comprises two groups of second vibrating assemblies (12) arranged on both sides of the first vibrating assembly (7) along the traveling direction of the frame (6); each second vibrating assembly (12) comprises a second sliding rod (121), a second pressing plate (122) and a second magnet part (123); the second sliding rod (121) is in sliding connection with the frame (6) and has the same sliding direction as the first sliding rod (71); one side of the second pressing plate (122) is provided with a second insertion slot (1221) in which the end of the second sliding rod (121) is arranged; the second insertion slot (1221) is connected with the second sliding rod (121) through bolts and nuts, and a clearance is arranged between the slot side wall of the second insertion slot (1221) and the second sliding rod (121); the second magnet part (123) is fixedly arranged on the side of the second pressing plate (122) close to the second insertion slot (1221); the side of the first pressing plate (72) close to the second pressing plate (122) is provided with a limiting protrusion (722), the second pressing plate (122) is provided with a limiting groove (1222), the limiting protrusion (722) is inserted into the limiting groove (1222), and a clearance is arranged between the limiting protrusion (722) and the slot side wall of the limiting groove (1222) along the sliding direction of the first sliding rod (71); the second pressing plate (122) is used for colliding with the foam concrete (361); the second magnet part (123) is fixedly arranged on the side of the second pressing plate (122) close to the second sliding rod (121), and the driving magnet part (92) is used for forcing the second magnet part (123) and the second pressing plate (122) to reciprocating vibrate.

3. The construction method of the protection structure of the soft foundation slope in the alpine and rainy area according to claim 2, characterized in that: Along the sliding direction of the first sliding rod (71), the two sides of the limiting protrusion (722) are provided with first racks (723), and the slot side walls on both sides of the limiting groove (1222) are provided with second racks (1223); the first racks (723) are used for engaging with the second racks (1223).

4. The construction method of the protection structure of the soft foundation slope in the alpine and rainy area according to claim 1, characterized in that: The vibrating device further comprises a third vibrating assembly (13) fixed on the frame (6), and the third vibrating assembly (13) is arranged in front of the first vibrating assembly (7) in the running direction; the third vibrating assembly (13) comprises a third linear reciprocating driving member (131), a third pressing plate (133), a vibrating motor (134) and a vibrating rod (135), the vibrating motor (134) and the vibrating rod (135) are fixed on both sides of the third pressing plate (133), the third linear reciprocating driving member (131) is fixed on the frame (6), and the driving end of the third linear reciprocating driving member (131) is connected with the third pressing plate (133); the third linear reciprocating driving member (131) drives the vibrating rod (135) to be inserted into the foam concrete (361).

5. The construction method of the protection structure of the soft foundation slope in the alpine and rainy area according to claim 4, characterized in that: The vibrating rod (135) is provided with a storage groove (1351), and the groove bottom wall of the vibrating rod (135) is provided with a discharge port (1352); the vibrating device further comprises a filling assembly (16), the filling assembly (16) comprises a filling rod (163), a hopper (161), a conveying pipe (162) and a counterweight (164); the filling rod (163) is arranged in the storage groove (1351), the filling rod (163) penetrates through the discharge port (1352), the hopper (161) is fixed on the frame (6), the hopper (161) is used for storing EPS particles (363), one end of the conveying pipe (162) is connected with the hopper (161), the other end of the conveying pipe (162) is arranged in the storage groove (1351), and the counterweight (164) is fixed on the side, away from the ground, of the filling rod (163); when the counterweight (164) abuts against the vibrating rod (135), the filling rod (163) blocks the discharge port (1352), the outer periphery of the filling rod (163) is provided with a through gap (1631), the through gap (1631) is arranged at the end, away from the counterweight (164), of the filling rod (163), and after the counterweight (164) is separated from the vibrating rod (135), the through gap (1631) penetrates through the discharge port (1352), and the EPS particles (363) are arranged in the through gap (1631) and the discharge port (1352) in sequence.

6. The construction method of the protection structure of the soft foundation slope in the alpine and rainy area according to claim 1, characterized in that: The vibrating device further comprises a fourth vibrating assembly (14) fixed at the rear of the first vibrating assembly (7) in the running direction; the fourth vibrating assembly (14) comprises a fourth sliding rod (142) and a fourth pressing plate (143), the fourth sliding rod (142) is slidably connected with the frame (6), and the fourth pressing plate (143) is fixedly connected with the end of the fourth sliding rod (142); the fourth pressing plate (143) is used for scraping the foam concrete (361) to be flat.

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