CN221167827U - Assembled supporting device for foundation pit slope - Google Patents

Abstract

The utility model relates to the technical field of building deep foundation pit slope protection, in particular to a foundation pit slope assembly type supporting device, which comprises a side slope, soil nails, positioning clamps and a surface layer, wherein the surface layer is paved on the side slope, and a plurality of through holes for inserting grouting pipes are uniformly formed in the side slope; the surface layer can be stably supported by fixing the paving surface of the surface layer and the side slope, and can be recovered after construction is completed, so that the support is assembled, the construction is green, the soil body exposure time can be greatly reduced, the foundation pit risk is greatly reduced, and the foundation pit can be reused in the later period. Compared with the traditional reinforcing mesh sprayed surface layer, the energy consumption is low, the pollution is small, cement and other materials are saved, the environment-friendly energy-saving and environment-friendly reinforced mesh sprayed surface layer is green, excessive mud, waste gas and other waste materials are not generated, the production of cement, reinforcing steel bars and other materials with larger pollution can be reduced, meanwhile, a single team can construct 1000 square meters per day, the labor cost is saved, and the working efficiency is improved.

Description

Assembled supporting device for foundation pit slope

Technical Field

The utility model relates to the technical field of building deep foundation pit slope protection, in particular to a foundation pit slope assembly type supporting device.

Background

If the foundation pit side slope is not protected for a long time, the slope surface can collapse after long-time impact of rainwater, so that the occurrence of foundation pit side slope collapse accidents is easy to occur, and the production safety is affected

The traditional side slope protection mode has a plurality of modes, adopts the spraying surface course of reinforcing bar net or wire net generally, and traditional side slope excavation process is many, support inefficiency, and is influenced greatly by weather, temperature, material supply, constructor quantity, operation level, and construction and use material pollution are serious.

Disclosure of utility model

The utility model provides a foundation pit slope assembled supporting device which is low in cost and can be reused, and aims to solve the defects and the shortcomings of treatment in the prior art.

In order to achieve the purpose, the technical scheme adopted by the utility model is that the foundation pit side slope assembly type supporting device comprises a side slope, soil nails, positioning clamps and a surface layer, wherein the surface layer is paved on the side slope, and a plurality of through holes for inserting grouting pipes are uniformly formed in the side slope; the grouting pipe is positioned in the through hole, and one end of the soil nail extends into the grouting pipe and is abutted with the soil layer; the soil nail other end is worn out the surface course inboard, reserve and have the clearance between slip casting pipe and the soil nail, the clearance intussuseption is filled with grouting material, the location card is located soil nail with the surface course junction.

Further; the locating clamp is connected with the soil nails in a welded mode, and the distance between every two adjacent soil nails is 2m.

Further; the soil nail is characterized in that a reinforcing rib is arranged between the soil nail and the surface layer, the reinforcing rib is wound around the end head of the soil nail for one circle, a base plate is arranged between the locating clamp and the reinforcing rib, and the locating clamp is pressed and fastened with the base plate to press the reinforcing rib.

Further; the surface layer comprises a reinforcement layer, a protective layer and a performance layer, wherein the performance layer is paved on the surface of the side slope, the protective layer is arranged on the surface of the performance layer, and a waterproof film of the protective layer faces outwards; the reinforcement layer is arranged on the surface of the protective layer, and the reinforcement layer, the protective layer and the performance layer are integrally formed.

Further; the lap joint of the surface layer and the side slope is flush, and the lap joint of the surface layer and the side slope is lapped by adopting zigzag binding wires.

Further; the slope top and the slope bottom of the slope are both provided with flanging, the flanging width of the slope top is not less than 0.8m, and the flanging width of the slope bottom is not less than 0.3m.

Further; the flange is provided with a drainage ditch, and a concrete hardening layer is laid on the surface of the flange.

Further; the slope bottom is provided with water drain holes, the distance between the water drain holes is not more than 3m, a PVC water drain pipe is arranged in the water drain holes, and geotechnical cloth is wound around the periphery of the PVC water drain pipe.

Further; the surface layer is made of GRF composite materials.

The utility model has the beneficial effects that:

The utility model provides a foundation pit slope assembled supporting device, which can realize stable supporting of a surface layer through the fixation of the paving surface of the surface layer and a slope, and can recover the surface layer after construction is completed, so that the supporting is assembled, the construction is green, the soil body exposure time can be greatly reduced, the risk of the foundation pit is greatly reduced, and the foundation pit slope can be reused in the later period. Compared with the traditional reinforcing mesh sprayed surface layer, the device has the advantages of low energy consumption, small pollution, cement and other materials saving, environment friendliness, no excessive waste such as slurry and waste gas, capability of reducing the production of cement and reinforcing steel bars and other materials with larger pollution, capability of constructing 1000 square meters per day by installing a single team, labor cost saving, work efficiency improvement, safe and reliable use, and convenience in implementation, popularization and application.

Drawings

FIG. 1 is a schematic view of a foundation pit slope assembly type supporting device;

FIG. 2 is a schematic view of the installation position of soil nails in a foundation pit slope assembled supporting device;

FIG. 3 is a schematic view of a top flange in a foundation pit slope assembly type support device according to the present utility model;

FIG. 4 is a schematic view of a flange of a foundation pit bottom in a foundation pit slope assembled supporting device;

FIG. 5 is a schematic structural view of a positioning clip for grouting pipes in a foundation pit slope assembly type supporting device according to the present utility model;

FIG. 6 is a top view of the installation position of a grouting pipe in a foundation pit slope assembly type supporting device according to the present utility model;

FIG. 7 is a schematic view of a surface layer lap joint structure in a foundation pit slope assembled supporting device according to the present utility model;

Fig. 8 is a schematic structural view of a surface layer in a foundation pit slope assembly type supporting device according to the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. Embodiments of the present utility model are intended to be within the scope of the present utility model as defined by the appended claims.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a foundation pit slope assembled supporting device.

In the embodiment of the utility model, as shown in fig. 1-8, the foundation pit slope 9 assembled supporting device comprises a slope 9, soil nails 1, positioning clamps 4 and a surface layer 2, wherein the surface layer 2 is paved on the slope 9, and a plurality of through holes for inserting grouting pipes 7 are uniformly formed in the slope 9; the grouting pipe 7 is positioned in the through hole, and one end of the soil nail 1 extends into the grouting pipe 7 and is abutted against the soil layer 24; the soil nail 1 other end wears out surface course 2 inboard, reserve the clearance between slip casting pipe 7 and the soil nail 1, the clearance intussuseption is filled with grouting material, location card 4 is located soil nail 1 with surface course 2 junction.

In this embodiment, the positioning card 4 is welded to the soil nails 1, and the distance between every two adjacent soil nails 1 is 2m.

In this embodiment, be provided with strengthening rib 3 between soil nail 1 and the surface course 2, strengthening rib 3 winds 1 end of soil nail winding round, locating clip 4 with be provided with the backing plate between the strengthening rib 3, locating clip 4 press fastening the backing plate makes strengthening rib 3 compress tightly.

In this embodiment, the surface layer 2 includes a reinforcement layer 21, a protective layer 22, and a performance layer 23, the performance layer 23 is laid on the surface of the slope 9, the protective layer 22 is disposed on the surface of the performance layer 23, and a waterproof film of the protective layer 22 faces outwards; the reinforcement layer 21 is arranged on the surface of the protective layer, and the reinforcement layer 21, the protective layer 22 and the performance layer 23 are integrally formed.

In this embodiment, the overlapping portion 25 of the surface layer 2 and the side slope 9 is flush, and the overlapping portion 25 of the surface layer 2 and the side slope 9 is in zigzag 26 wire bonding overlapping.

In this embodiment, the top and the bottom of the slope 9 are both provided with flanges 91, the width of the flanges 91 at the top of the slope is not less than 0.8m, and the width of the flanges 91 at the bottom of the slope is not less than 0.3m.

In this embodiment, the drainage ditch 6 is disposed at the flange 91, and a concrete hardened layer 5 is laid on the surface of the flange 91.

In this embodiment, the slope bottom is provided with a drain hole, the drain hole interval is not greater than 3m, and the drain hole is internally provided with a PVC drain pipe 8, and geotechnical cloth is wound around the PVC drain pipe 8.

In this embodiment, the facing layer 2 is made of a GRF composite material.

The device is characterized in that an upper opening line and a lower opening line of earth excavation are placed on a base surface by utilizing a total station in advance in the actual construction process, after the earth excavation is carried out in a layered manner to a designed elevation, the local slope surface of a side slope 9 is trimmed, soil nails 1 are constructed, after the hole forming, manufacturing, installing and grouting processes of the soil nails 1 are sequentially completed, the surface layer 2 is paved and connected in a seam mode, in order to prevent rainwater from penetrating from the top and the bottom of the slope, the top and the bottom of the slope are subjected to flanging 91 treatment, and finally the construction of a water drainage hole is carried out. The device comprises a side slope 9 and a green GRF surface layer 2, wherein the green assembled surface layer 2 is paved on the side slope 9, the main construction procedures are that paying off, earth excavation, manual slope repairing, soil nail 1 construction, surface layer 2 paving, joint connection, slope top and slope bottom flanging 91 treatment and water discharge hole construction are measured, the surface layer 2 is mainly prefabricated by a reinforced layer 21, a protective layer 22, a performance layer 23 and the like, the functions of tensile resistance, reverse filtration, water resistance and the like are realized, assembled installation can be realized in the installation process, more than 90% of disassembly and assembly can be realized, and after the device is used, the device can be selectively recycled according to engineering characteristics. Measuring and paying off, namely measuring the upper opening line of the foundation pit by using a total station and a steel rule, and sprinkling a straight line according to the upper opening of the foundation pit by using lime powder; the earth excavation is slope discharging excavation of the side slope 9 according to a design drawing, and the excavation width of the working face can meet the operation requirement of the device; the slope 9 is manually trimmed, the local slope is excavated or backfilled according to the requirement of the design of the slope 9, and the slope is preferably scraped from top to bottom when trimming the slope 9, so that the slope and the flatness of the design requirement are achieved.

When the through holes are marked and numbered according to the design requirement, the through holes are drilled by a geological drilling machine, hole cleaning inspection is carried out after the holes are drilled, grouting treatment is immediately carried out on the local water seepage hole collapse or falling and soil loosening occurring in the through holes, and soil nails 1 are timely installed and grouting is carried out; the soil nail 1 is a reinforced soil nail 1 with the diameter of 18CM, the length is constructed according to the design length, the distance is 1.5m by 1.5m, and the positioning clamps 4 are welded every 2m to prevent the main reinforcement from deviating from the center of the soil nail 1. During installation, the soil nail 1 should be placed at the bottom of the through hole once, hard insertion is forbidden to be forced into, and once the soil nail 1 cannot be smoothly moved, the steel bar is extracted, and the hole is cleared again. After construction is completed, the soil nails 1 are required to be exposed for 50-80mm; after the reinforced soil nails 1 are put in, cement paste is injected into the through holes through the grouting pipes 7 by a grouting machine. Wherein the grouting material adopts pure cement slurry with cement ratio of 0.5, the cement adopts composite silicate cement with the grade of more than 42.5R, and the compressive strength is not less than 20MPa. Grouting pressure is 0.4-0.6Mpa. The surface layer 2 is made of GRF composite material, wherein the GRF composite material is a novel reinforcing material formed by compounding resin and glass fiber, has good mechanical property and corrosion resistance, and has material properties which are equal to those of the steel bars, but the cost, the power consumption and the resource consumption are far smaller than those of the steel bars, and the GRF composite material can be recycled and reused, meets the requirements of modern environment-friendly construction, and the lap joint 25 of the surface layer 2 and the side slope 9 is flat and has moderate tightness. The G surface layer 2 is manually rolled and paved, the cloth surface is flattened, the surface layer 2 is paved from the position of the slope top flanging 91, and the deformation allowance is properly reserved from the lower part to the excavation surface. The surface layer 2 is paved with partition blocks, the blocks are mutually overlapped, the overlap length is not less than 300mm, and the vertical overlap joint is applied to the upper opening and the lower opening and is effectively connected with the positioning clamp 4 and the gasket reinforcing ribs 3. The lap joint 25 of the surface layer 2 is in butt joint, the lap joint 25 of the slope 9 and the surface layer 2 is in zigzag 26 wire tying lap joint, and the wire tying interval is 500mm; the reinforcement layer 21 is formed by winding the end head of the soil nail 1 on the slope surface of the side slope 9 through the reinforcement 3 for one circle, tensioning, fixing by installing a round backing plate, finally fastening the backing plate by using the positioning clamp 4 to tightly press the reinforcement 3, wherein the gasket is a steel sheet, and the reinforcement 3 is a steel wire rope. The positioning card 4 adopts the dimensions of 80mm long and 20mm wide and is fixed by being equipped with an M10 bolt.

Wherein, the treatment of the slope top and the slope bottom flanges 91 means that waterproof materials are coated at the position, the width of the slope top flanges 91 is not smaller than 0.8m, and the width of the slope bottom flanges 91 is not smaller than 0.3m; the slope top and the slope bottom are made of materials of a vertical dowel anchoring surface layer 2, and are made of steel bars with the diameter of 14cm and the length of 1m, wherein the spacing is the same as the dowel flat spacing; after the surface layer 2 is installed, the thickness of the top and the bottom of the slope is not less than 80mm, and the top and the bottom of the slope are covered by concrete with the strength not less than C20, so that rainwater is prevented from penetrating from the top or the bottom of the slope.

Specifically, the distance between the drain holes and the slope bottom is 300mm, and the distance between the drain holes is not more than 3m. The drain hole is internally provided with a PVC drain pipe 8 with the diameter of 50mm, the depth of the PVC drain pipe inserted into a soil layer 24 is not less than 300mm, the PVC drain pipe 8 is wrapped by geotextile, and the PVC drain pipe is exposed out of a certain side length for draining.

A drain 6 is arranged at the position of the slope top and the slope bottom from the flanging 91 for draining water; preventing rainwater from leaking from the top of the slope.

The device is suitable for clay, sand soil such as (medium sand, coarse sand) sand soil, lithology soil and the like; interactive complex types of soil such as silt, silty clay, fine sand, silt and the like; slope 9 engineering and foundation pit engineering in foundation construction projects and building projects of various complicated special soil quality such as filled soil, soft soil, collapsible loess and the like, and infrastructure projects such as railways, highways, civil aviation, subways and the like; on the basis of not changing the traditional theory mechanism, the net spray surface layer 2 is replaced, compared with the traditional spray anchor support, the construction cost is low, the application range is wide, and certain aesthetic functions are considered; the energy consumption is low, the pollution is small, the material is saved, the environment is protected, too much mud, waste gas and other wastes can not be generated, and the production of materials with larger pollution such as cement, reinforcing steel bars and the like can be reduced.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (5)

1. The foundation pit side slope assembly type supporting device is characterized by comprising a side slope (9), soil nails (1), positioning clamps (4) and a surface layer (2), wherein the surface layer (2) is paved on the side slope (9), and a plurality of through holes for inserting grouting pipes (7) are uniformly formed in the side slope (9); the grouting pipe (7) is positioned in the through hole, and one end of the soil nail (1) extends into the grouting pipe (7) and is abutted with the soil layer (24); the other end of the soil nail (1) penetrates out of the inner side of the surface layer (2), a gap is reserved between the grouting pipe (7) and the soil nail (1), grouting materials are filled in the gap, and the positioning clamp (4) is positioned at the joint of the soil nail (1) and the surface layer (2);

The slope top and the slope bottom of the slope (9) are respectively provided with a flanging (91), the width of the flanging (91) of the slope top is not smaller than 0.8m, and the width of the flanging (91) of the slope bottom is not smaller than 0.3m;

the positioning clamp (4) is welded with the soil nails (1), and the distance between every two adjacent soil nails (1) is 2m;

A reinforcing rib (3) is arranged between the soil nail (1) and the surface layer (2), the reinforcing rib (3) is wound around the end of the soil nail (1) for one circle, a base plate is arranged between the positioning clamp (4) and the reinforcing rib (3), and the positioning clamp (4) is tightly pressed to tightly press the base plate to tightly press the reinforcing rib (3);

The slope bottom is provided with water drain holes, the distance between the water drain holes is not more than 3m, a PVC water drain pipe (8) is arranged in the water drain holes, and geotechnical cloth is wound around the periphery of the PVC water drain pipe (8).

2. The foundation pit slope assembled supporting device according to claim 1, wherein the surface layer (2) comprises a reinforced layer (21), a protective layer (22) and a performance layer (23), the performance layer (23) is paved on the surface of the slope (9), the protective layer (22) is arranged on the surface of the performance layer (23) and a waterproof film of the protective layer (22) faces outwards; the reinforcement layer (21) is arranged on the surface of the protective layer, and the reinforcement layer (21), the protective layer (22) and the performance layer (23) are integrally formed.

3. A pit slope assembly support according to claim 2, characterized in that the overlap (25) of the surface layer (2) and the slope (9) is flush, and the overlap of the surface layer (2) and the slope (9) is wire-tied in a zigzag (26).

4. The foundation pit slope assembled supporting device according to claim 1, wherein a drainage ditch (6) is arranged at the turnup (91), and a concrete hardening layer (5) is paved on the surface of the turnup (91).

5. A pit slope assembly support according to claim 3, wherein the facing (2) is of GRF composite material.