CN210917406U

CN210917406U - Prestressing force soil nail assembled supporting construction

Info

Publication number: CN210917406U
Application number: CN201921673860.6U
Authority: CN
Inventors: 叶纯志; 陆凤卫; 黄亮
Original assignee: Anhui Yonghao Construction Engineering Co ltd
Current assignee: Anhui Yonghao Construction Engineering Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-07-03
Anticipated expiration: 2029-09-30

Abstract

The utility model relates to an assembled supporting construction of prestressing force soil nail, including first soil layer and the second soil layer that sets up on first soil layer, install the hanging net on the domatic of second soil layer, the hanging net upper berth is equipped with domatic concrete layer, has seted up the mounting groove on first soil layer upper surface is close to the domatic position of second soil layer, installs the first fixed subassembly that is used for fixed hanging net lower extreme in the mounting groove, and the cylindricality recess has been seted up to second soil layer upper surface, installs the fixed subassembly of second that is used for fixed hanging net upper end in the cylindricality recess. The utility model discloses when installing the net on domatic of second soil layer, the staff only need be fixed in first soil layer with the net lower extreme through first fixed subassembly on, adopt the fixed subassembly of second to be fixed in second soil layer upper surface with the net upper end simultaneously, lay concrete layer on the net afterwards, and do not implant the soil nail on the slope, the effectual foundation ditch that leads to because of implanting the soil nail domatic local condition of collapsing or unstability that appears of has been favorable to preventing the slope soil erosion and water loss.

Description

Prestressing force soil nail assembled supporting construction

Technical Field

The utility model belongs to the technical field of side slope supporting construction technique and specifically relates to a prestressing force soil nail assembled supporting construction is related to.

Background

The soil nailing wall structure is characterized in that reinforcing steel bars or anchor rods are driven into the excavated slope surface to serve as soil nails, a reinforcing mesh is paved on the surface of the slope surface, and then a layer of concrete surface layer is sprayed.

The utility model discloses a chinese utility model patent that publication number is CN208009450U discloses an assembled supporting construction of prestressing force soil nail, and this supporting construction includes that the recoverable net piece of polylith and many prestressing force soil nails, and in the slope was implanted to prestressing force soil nail, recoverable net piece can be dismantled and fix the pin fin that exposes at domatic outside prestressing force soil nail, and recoverable net piece includes geogrid. The utility model discloses a realized the assembled construction of side slope protection, economic environmental protection, but reuse.

Among the above-mentioned technical scheme, adopt the soil nail to be fixed in recoverable net piece on domatic, nevertheless when soil nail is implanted in soft soil domatic area, the local condition of collapsing or unstability appears very easily in the foundation ditch domatic around the soil nail, is unfavorable for preventing side slope soil erosion and water loss.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a prestressing force soil nail assembled supporting construction, this supporting construction do not implant the soil nail on the side slope, but will hang the net through fixed subassembly and be fixed in the soil layer upper surface, has effectually prevented to lead to the domatic local condition of collapsing or unstability of appearing of foundation ditch because of implanting the soil nail, is favorable to preventing the side slope soil erosion and water loss.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides an assembled supporting construction of prestressing force soil nail, includes first soil layer and sets up the second soil layer on first soil layer, it is domatic to have on the second soil layer, install the hanging net on the domatic of second soil layer, the hanging net upper berth is equipped with domatic concrete layer, the mounting groove has been seted up on the first soil layer upper surface is close to the domatic position of second soil layer, install the first fixed subassembly that is used for fixed hanging net lower extreme in the mounting groove, the cylindricality recess has been seted up to second soil layer upper surface, install the fixed subassembly of second that is used for fixed hanging net upper end in the cylindricality recess.

Through adopting above-mentioned technical scheme, when installing the hanging net on the domatic of second soil layer, the staff only need be fixed in first soil layer with the hanging net lower extreme through first fixed subassembly on, adopt the fixed subassembly of second to be fixed in second soil layer upper surface with the hanging net upper end simultaneously, lay the concrete layer on the hanging net afterwards, and do not implant the soil nail on the slope, the effectual circumstances that leads to the domatic local collapse of foundation ditch or unstability because of implanting the soil nail that has prevented, be favorable to preventing the slope soil erosion and water loss.

The utility model discloses further set up to: the first fixing assembly comprises a fixing block fixed in the mounting groove, a pressing plate hinged to the upper surface of the fixing block, a protruding block fixed on the bottom surface of the pressing plate and a bolt penetrating through the pressing plate, a threaded hole connected with the bolt in a threaded mode is formed in the fixing block, and the bolt penetrates through the pressing plate and is connected with the threaded hole in a threaded mode.

Through adopting above-mentioned technical scheme, when using first fixed subassembly to fix the string net lower extreme, the staff only needs to place the string net lower extreme on the fixed block upper surface, rotates the pressure strip simultaneously for the lug lower extreme alternates in the mesh of string net, screws up the bolt in the threaded hole on the fixed block afterwards, make the bottom surface of bolt head and the upper surface of pressure strip support tightly can, this moment, the string net lower extreme is spacing by the lug, has played good fixed action to the string net lower extreme with this.

The utility model discloses further set up to: and a first concrete layer is poured between the side wall on the peripheral side of the fixed block and the four inner side walls of the mounting groove.

Through adopting above-mentioned technical scheme, the mounting groove is seted up on first soil layer, pours first concrete layer between fixed block lateral wall and mounting groove lateral wall for the linkage effect between fixed block and the first soil layer is more fastened, has strengthened first fixed subassembly's stability.

The utility model discloses further set up to: the fixed subassembly of second is including being fixed in the barrel in the cylindricality recess, installing on the barrel diapire and rotate the soil nail of being connected with it and be fixed in the dwang that the soil nail kept away from barrel inner bottom wall one end, the external screw thread has been seted up on the soil nail lateral wall, the cover is equipped with the tourus with external screw thread threaded connection on the soil nail, install in the barrel and be used for restricting the spacing subassembly of tourus circumferential direction, the annular groove has been seted up on the tourus lateral wall, install solid fixed ring in the annular groove, gu fixed ring's upper surface supports tightly with the roof of annular groove, gu fixed ring's lower surface supports tightly with the diapire of annular groove, be fixed with wire rope on the fixed ring lateral wall, wire rope keeps away from solid fixed ring's.

Through adopting above-mentioned technical scheme, when using the fixed subassembly of second to fix the net upper end, the staff only needs to fix wire rope's one end and net upper end, it is fixed with wire rope's the other end and retaining ring simultaneously, subsequently, the staff need rotate the dwang, the dwang drives the soil nail and takes place to rotate, the circumferential direction of the tourus on the soil nail is restricted by spacing subassembly, make the tourus move down along the soil nail, and the tourus then pulls wire rope and moves down, when being taut until wire rope, the stall dwang can, at this moment, wire rope is taut with the net, establish domatic concrete layer on the net after tensioning, with this intensity that has strengthened slope protection structure, thereby played the good effect that prevents soil erosion and water loss.

The utility model discloses further set up to: and a second concrete layer is poured between the side wall of the cylinder body and the inner side wall of the cylindrical groove.

Through adopting above-mentioned technical scheme, the cylindricality recess is seted up on the second soil layer, pours the second concrete layer between barrel lateral wall and cylindricality recess inside wall for the joint action between barrel and the second soil layer is more firm, has strengthened the stability of the fixed subassembly of second.

The utility model discloses further set up to: the limiting assembly comprises a sliding rod fixed on the outer side wall of the annular body and a sliding groove arranged on the inner side wall of the cylinder body, and the sliding rod is in sliding fit with the sliding groove.

Through adopting above-mentioned technical scheme, when the staff uses the fixed subassembly of second to fix the net upper end, at soil nail pivoted in-process, the circumferential direction of tourus is restricted by the slide bar, and along with the rotation of soil nail, the tourus moves down along the external screw thread on the soil nail, and the slide bar then moves down along the spout to be favorable to the tourus taut with wire rope, in order to strain the net.

The utility model discloses further set up to: the cover is equipped with rather than fixed rubber sleeve on the dwang lateral wall.

Through adopting above-mentioned technical scheme, the rubber sleeve adopts rubber materials to make, and its surface has great coefficient of friction to the staff of being convenient for holds firm dwang and rotates.

The utility model discloses further set up to: and a cement paste layer is laid on the upper surface of the second soil layer.

By adopting the technical scheme, the cement paste is good in cementing condition, high in stone strength and convenient to prepare, and a firm cement paste layer is formed after the cement paste is cured, so that the waterproofness of the upper surface of the second soil layer is enhanced, the probability of rainwater infiltration from the second soil layer is reduced, the phenomenon that the rainwater infiltrates and erodes the second soil layer is avoided, and the slope water and soil loss is further avoided.

To sum up, the utility model discloses a beneficial technological effect does:

when the hanging net is installed on the slope surface of the second soil layer, workers only need to fix the lower end of the hanging net on the first soil layer through the first fixing assembly, meanwhile, the upper end of the hanging net is fixed on the upper surface of the second soil layer through the second fixing assembly, then, the concrete layer is paved on the hanging net, and soil nails are not implanted on the slope surface, so that the situation that the slope surface of the foundation pit is locally collapsed or unstable due to the implantation of the soil nails is effectively prevented, and the water and soil loss of the slope surface is favorably prevented;

when the first fixing assembly is used for fixing the lower end of the hanging net, a worker only needs to place the lower end of the hanging net on the upper surface of the fixing block and rotate the pressing plate simultaneously to enable the lower end of the lug to be inserted into the mesh of the hanging net in a penetrating mode, then the bolt is screwed in the threaded hole in the fixing block, the bottom surface of the head of the bolt is abutted against the upper surface of the pressing plate, and at the moment, the lower end of the hanging net is limited by the lug, so that the lower end of the hanging net is well fixed;

this scheme is when using the fixed subassembly of second to fix the net upper end, the staff only needs to fix wire rope's one end and net upper end, it is fixed with wire rope's the other end and retaining ring simultaneously, subsequently, the staff need rotate the dwang, the dwang drives the soil nail and takes place to rotate, the circumferential direction of the tourus on the soil nail is restricted by spacing subassembly, make the tourus move down along the soil nail, and the tourus then pulls wire rope and moves down, when being taut until wire rope, the stall dwang can, at this moment, wire rope is taut with the net, lay domatic concrete layer on the net after tensioning, with this intensity that has strengthened slope protection structure, thereby played good effect that prevents soil erosion and water loss.

Drawings

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

FIG. 2 is a cross-sectional view of the structure of FIG. 1;

FIG. 3 is a partially enlarged schematic view of portion A of FIG. 2;

fig. 4 is a partially enlarged structural view of a portion B in fig. 2.

Reference numerals: 1. a first soil layer; 11. mounting grooves; 2. a second soil layer; 21. a cement slurry layer; 211. a circular through hole; 22. a cylindrical groove; 3. hanging a net; 4. a first fixed component; 41. a fixed block; 411. a first concrete layer; 42. a compression plate; 43. a bump; 44. a bolt; 5. a second fixed component; 51. a barrel; 511. a second concrete layer; 52. soil nailing; 521. an external thread; 53. rotating the rod; 531. a rubber sleeve; 54. a torus; 541. an annular groove; 55. a fixing ring; 56. a wire rope; 6. a limiting component; 61. a chute; 62. a slide bar; 7. and a slope concrete layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, for the utility model discloses a prestressing force soil nail assembled supporting construction, including first soil layer 1, second soil layer 2 and hanging net 3. First soil layer 1 and second soil layer 2 are natural soil, and second soil layer 2 is located first soil layer 1, and second soil layer 2 has the domatic of slope. The hanging net 3 is woven by stainless steel wires, and the hanging net 3 is arranged on the slope surface of the second soil layer 2.

As shown in fig. 1, an installation groove 11 is formed in a position, close to the slope surface of the second soil layer 2, of the upper surface of the first soil layer 1, the cross section of the installation groove 11 is rectangular, a first fixing assembly 4 for fixing the lower end of a hanging net 3 (see fig. 3) on the first soil layer 1 is installed in the installation groove 11, and as shown in fig. 3, the first fixing assembly 4 comprises a fixing block 41, a pressing plate 42, a convex block 43, a threaded hole and a bolt 44. The fixing block 41 is a rectangular plate-shaped structure and made of stainless steel material, the bottom surface of the fixing block 41 is fixed on the inner bottom wall of the installation groove 11, and a first concrete layer 411 is poured between the side wall of the peripheral side of the fixing block 41 and the four inner side walls of the installation groove 11. The first concrete layer 411 is formed by pouring concrete, and after the concrete is hardened, the connection between the fixing block 41 and the first concrete layer 1 is firmer. The pressing plate 42 is a rectangular plate-shaped structure, and is hinged to the upper surface of the fixing block 41. The bump 43 is a block-shaped structure with a circular cross section, the axis of the bump is perpendicular to the bottom surface of the pressing plate 42, and the bump 43 is fixed on the bottom surface of the pressing plate 42. The axis of the threaded hole is vertical, and the threaded hole is opened on the upper surface of the fixing block 41. The bolt 44 penetrates through the fixing block 41 and is rotatably connected with the fixing block, the axis of the bolt 44 is also perpendicular to the bottom surface of the pressing plate 42, and the bolt 44 is in threaded connection with the threaded hole. When using first fixed subassembly 4 to fix the lower extreme of hanging net 3, the staff only need place hanging net 3 lower extreme on fixed block 41 upper surface, rotate pressure strip 42 simultaneously for the lug 43 of pressure strip 42 bottom surface inserts in the mesh of hanging net 3, screw up bolt 44 in the screw hole afterwards, until the bottom surface of bolt 44 head with the upper surface of pressure strip 42 support tightly can, this moment, hanging net 3 lower extreme is restricted by lug 43, make hanging net 3 lower extreme be fixed in on first soil layer 1.

As shown in fig. 1, a cement slurry layer 21 is laid on the upper surface of the second soil layer 2, the cement slurry layer 21 is formed by curing cement slurry, the cement slurry is good in cementation condition, high in stone strength and convenient to prepare, and a firm cement slurry layer 21 is formed after the cement slurry is cured, so that the waterproofness of the upper surface of the second soil layer 2 is enhanced, the probability of rainwater infiltration from the second soil layer 2 is reduced, and the phenomenon that the rainwater infiltrates and erodes the second soil layer 2 is avoided. In this embodiment, in order to further improve the water resistance of the cement paste layer 21, a small molecule water-proofing agent (such as a nano-silicone water-proofing agent) may be added during the preparation of the cement paste to improve the water-tightness and water-repellency of the cement paste layer 21, thereby achieving the purpose of improving the anti-permeability grade of the cement paste layer 21.

As shown in fig. 4, a circular through hole 211 is formed through the cement paste layer 21, and an axis of the circular through hole 211 is vertical. Cylindrical grooves 22 are formed in the upper surface of the second soil layer 2, the cross sections of the cylindrical grooves 22 are circular, and the axes of the cylindrical grooves 22 coincide with the axes of the circular through holes 211. The cylindrical groove 22 is internally provided with a second fixing component 5 for fixing the upper end of the hanging net 3 (shown in fig. 2) on the second soil layer 2, and the second fixing component 5 comprises a cylinder body 51, a soil nail 52, a rotating rod 53, a ring body 54, a fixing ring 55 and a steel wire rope 56. The cylinder 51 is a cylindrical structure, the top of the cylinder is open, the bottom of the cylinder is closed, the bottom wall of the cylinder 51 is fixed to the inner bottom wall of the cylindrical groove 22, and a second concrete layer 511 is poured between the outer side wall of the cylinder 51 and the inner side wall of the cylindrical groove 22. The second concrete layer 511 is formed by pouring concrete, and the connection between the cylinder 51 and the second soil layer 2 is firmer after the concrete is hardened. The soil nail 52 is in a round rod shape, the axis of the soil nail 52 coincides with the axis of the cylinder 51, the lower end of the soil nail 52 is rotatably connected with the inner bottom wall of the cylinder 51, and the side wall of the soil nail 52 is provided with an external thread 521. The rotating rod 53 is a round rod-shaped structure, the axis of the rotating rod is horizontal, and the bottom arc-shaped surface of the rotating rod 53 is fixed with the upper end of the soil nail 52. The ring 54 is of a circular ring structure, is sleeved on the soil nail 52 and is in threaded connection with the external thread 521, the cylinder 51 is internally provided with a limiting component 6 for limiting circumferential rotation of the ring 54, and the limiting component 6 comprises a sliding groove 61 and a sliding rod 62. The sliding groove 61 is opened on the inner side wall of the cylinder 51, and the extending direction of the sliding groove 61 is consistent with the axial direction of the cylinder 51. The sliding rod 62 is a round rod-shaped structure, the axis of the sliding rod is horizontal, one end of the sliding rod 62 is fixed with the side wall of the annular body 54, the other end of the sliding rod 62 is in sliding fit with the sliding groove 61, and the sliding rod 62 and the sliding groove 61 are matched to play a good role in limiting the circumferential rotation of the annular body 54.

As shown in fig. 4, an annular groove 541 is formed in the side wall of the annular body 54, the cross section of the annular groove 541 is circular, and the axis of the annular groove 541 coincides with the axis of the annular body 54. The fixing ring 55 is of a circular ring structure, an inner arc surface of the fixing ring 55 is attached to an arc surface of the annular groove 541, an upper surface of the fixing ring 55 is abutted against an inner top wall of the annular groove 541, and a bottom surface of the fixing ring 55 is abutted against an inner bottom wall of the annular groove 541. One end of the wire rope 56 is welded and fixed with the outer side wall of the fixing ring 55, and the other end of the wire rope 56 is fixed with the upper end of the hanging net 3 (see fig. 2). When the second fixing component 5 is used for fixing the upper end of the hanging net 3, a worker only needs to hold the rotating rod 53 and rotate the rotating rod 53, the rotating rod 53 drives the soil nails 52 to rotate after rotating, the circumferential rotation of the ring body 54 is limited by the sliding rod 62 and the sliding groove 61, so that the ring body 54 moves downwards along the soil nails 52, in the process, the steel wire rope 56 gradually tends to be in a tensioning state, the hanging net 3 is tensioned gradually, and the upper end of the hanging net 3 is fixed.

As shown in fig. 4, the rotating rod 53 is sleeved with a rubber sleeve 531 fixed with the rotating rod 53, the rubber sleeve 531 is made of rubber materials, the surface of the rubber materials has a large friction coefficient, so that the friction force between the hand of the worker and the rotating rod 53 is increased, the worker can firmly hold the rotating rod 53 and rotate the rotating rod, and the hanging net 3 (see fig. 2) can be tensioned by the worker.

As shown in fig. 1 and 2, after the net 3 is tensioned, the worker only needs to lay a slope concrete layer 7 on the slope of the second soil layer 2, the slope concrete layer 7 is formed by laying concrete materials, the concrete is adhered to the slope of the second soil layer 2 after being cured, the net 3 woven by steel wires enhances the strength of the slope concrete layer 7, so that the slope protection capability of the prestressed concrete nail assembled supporting structure is enhanced, and the slope water and soil loss is effectively prevented. Meanwhile, the worker needs to backfill soil on the upper surface of the cement slurry layer 21 to bury the second fixing assembly 5, so that each part of the second fixing assembly 5 is prevented from being exposed in the air, and the second fixing assembly 5 is well protected.

The implementation principle of the embodiment is as follows: when installing hanging net 3 on the domatic of second soil layer 2, the staff only need be fixed in first soil layer 1 with hanging net 3 lower extreme through first fixed subassembly 4 on, adopt the fixed subassembly 5 of second to be fixed in second soil layer 2 upper surface with hanging net 3 upper end simultaneously, lay concrete layer on hanging net 3 afterwards, and do not implant soil nail 52 on the slope, the effectual condition that leads to the domatic local collapse of foundation ditch or unstability to appear because of implanting soil nail 52 that has prevented, be favorable to preventing the slope soil erosion and water loss.

This scheme is when installing hanging net 3 on domatic of second soil layer 2, the staff only need rotate pressure strip 42, place hanging net 3 on pressure strip 42's upper surface simultaneously, rotate pressure strip 42 to the normal position afterwards, make the lug 43 of pressure strip 42 bottom insert in the mesh of wire net, and screw up bolt 44 in the threaded hole, until the bottom surface of bolt 44 head with the upper surface of pressure strip 42 support tightly can, at this moment, the lower extreme of hanging net 3 is restricted between pressure strip 42 and fixed block 41 by lug 43. When the upper end of the hanging net 3 is fixed, a worker needs to straighten the hanging net 3, one end of a steel wire rope 56 is fixed to the upper end of the hanging net 3, the other end of the steel wire rope 56 is welded and fixed to a fixing ring 55, then the rotating rod 53 is held and rotates, the rotating rod 53 drives a soil nail 52 fixed to the rotating rod 53 to rotate, the circumferential rotation of the ring body 54 is limited by a sliding rod 62 and a sliding groove 61, so that the ring body 54 moves downwards along the soil nail 52, in the process, the steel wire rope 56 gradually tends to be in a tightening state, the steel wire rope 56 gradually pulls the hanging net 3 and the hanging net 3 tends to be in a tightening state, and therefore the upper end of the hanging net 3 is fixed. After the net 3 is tensioned, the worker only needs to lay a concrete layer on the slope of the second soil layer 2 and backfill soil on the upper surface of the cement layer 21.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an assembled supporting construction of prestressing force soil nail, includes first soil layer (1) and sets up second soil layer (2) on first soil layer (1), it is domatic to have on second soil layer (2), install string net (3) on the domatic of second soil layer (2), string net (3) upper berth is equipped with domatic concrete layer (7), its characterized in that: mounting groove (11) have been seted up on first soil layer (1) upper surface is close to the domatic position of second soil layer (2), install first fixed subassembly (4) that are used for fixed string net (3) lower extreme in mounting groove (11), cylindricality recess (22) have been seted up to second soil layer (2) upper surface, install second fixed subassembly (5) that are used for fixed string net (3) upper end in cylindricality recess (22).

2. The assembled prestressed soil nailing supporting structure of claim 1, wherein: the first fixing assembly (4) comprises a fixing block (41) fixed in the mounting groove (11), a pressing plate (42) hinged to the upper surface of the fixing block (41), a convex block (43) fixed to the bottom surface of the pressing plate (42) and a bolt (44) penetrating through the pressing plate (42), a threaded hole in threaded connection with the bolt (44) is formed in the fixing block (41), and the bolt (44) penetrates through the pressing plate (42) and is in threaded connection with the threaded hole.

3. The assembled prestressed soil nailing supporting structure of claim 2, wherein: a first concrete layer (411) is poured between the side wall of the peripheral side of the fixing block (41) and the four inner side walls of the mounting groove (11).

4. The assembled prestressed soil nailing supporting structure of claim 1, wherein: the second fixing component (5) comprises a cylinder body (51) fixed in the cylindrical groove (22), a soil nail (52) installed on the bottom wall of the cylinder body (51) and rotatably connected with the cylinder body (51) and a rotating rod (53) fixed at one end, far away from the inner bottom wall of the cylinder body (51), of the soil nail (52), an external thread (521) is formed in the side wall of the soil nail (52), a ring body (54) in threaded connection with the external thread (521) is sleeved on the soil nail (52), a limiting component (6) used for limiting circumferential rotation of the ring body (54) is installed in the cylinder body (51), an annular groove (541) is formed in the outer side wall of the ring body (54), a fixing ring (55) is installed in the annular groove (541), the upper surface of the fixing ring (55) is tightly abutted to the top wall of the annular groove (541), the lower surface of the fixing ring (55) is tightly abutted to the bottom, and a steel wire rope (56) is fixed on the side wall of the fixing ring (55), and one end, far away from the fixing ring (55), of the steel wire rope (56) is fixed with the upper end of the hanging net (3).

5. The fabricated prestressed soil nailing supporting structure of claim 4, wherein: and a second concrete layer (511) is poured between the side wall of the cylinder body (51) and the inner side wall of the cylindrical groove (22).

6. The fabricated prestressed soil nailing supporting structure of claim 4, wherein: the limiting assembly (6) comprises a sliding rod (62) fixed on the outer side wall of the ring body (54) and a sliding groove (61) arranged on the inner side wall of the cylinder body (51), and the sliding rod (62) is matched with the sliding groove (61) in a sliding mode.

7. The fabricated prestressed soil nailing supporting structure of claim 4, wherein: the cover is equipped with rather than fixed rubber sleeve (531) on dwang (53) lateral wall.

8. The assembled prestressed soil nailing supporting structure of claim 1, wherein: and a cement paste layer (21) is laid on the upper surface of the second soil layer (2).