CN117306546A - Basement foundation pit slope supporting structure and construction method - Google Patents
Basement foundation pit slope supporting structure and construction method Download PDFInfo
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- CN117306546A CN117306546A CN202311388134.0A CN202311388134A CN117306546A CN 117306546 A CN117306546 A CN 117306546A CN 202311388134 A CN202311388134 A CN 202311388134A CN 117306546 A CN117306546 A CN 117306546A
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- 238000010276 construction Methods 0.000 title claims abstract description 40
- 239000002689 soil Substances 0.000 claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 230000003014 reinforcing effect Effects 0.000 claims description 18
- 238000009412 basement excavation Methods 0.000 claims description 17
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000009435 building construction Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a basement foundation pit slope supporting structure and a construction method, which relate to the technical field of building construction and have the technical scheme that: the foundation pit side slope is formed with a slope surface, the supporting structure comprises a cross rod, protecting covers and a first anchor rod, one end of the first anchor rod is fixedly connected with the cross rod, the other end of the first anchor rod is fixed in the soil body of the slope surface, one end of the protecting cover is rotationally connected with the cross rod, the other end of the protecting cover is slidably connected with a second anchor rod which can be hammered into the soil body of the slope surface, the protecting covers on each cross rod are arranged to be a plurality of along the length direction of the slope surface, a bolt rod is detachably connected between every two adjacent protecting covers in the width direction and the length direction of the slope surface respectively, a concrete pouring cavity is formed between the protecting covers and the slope surface, and a pouring opening communicated with the concrete pouring cavity is formed in the top side of each protecting cover. The invention has the advantages of convenient and quick construction and good support stability.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a basement foundation pit slope supporting structure and a construction method.
Background
The side slope support technology is mainly used for supporting and protecting the surrounding environment in civil engineering construction. Is an important measure for improving the construction quality and safety of the foundation pit of the civil engineering. The stability of soil around the foundation pit is guaranteed, and meanwhile, the requirement that the basement construction has enough space is met, which is a necessary condition for earth excavation and basement construction.
The Chinese patent with publication number CN116733001A discloses a foundation pit side slope supporting structure and a construction method, and the technical scheme is as follows: the concrete pile type slope comprises a slope surface, wherein the slope surface forms a slope surface, a plurality of anchor holes are formed in the slope surface, anchor rods are fixedly arranged in the slope surface, a reinforcing mesh is paved on the slope surface and connected with the anchor rods, concrete layers are arranged on the reinforcing mesh and the slope surface, a plurality of water filtering pipes are arranged on the slope surface, a plurality of slope surface steel sheet piles are transversely arranged along the slope surface, and at least one row of slope surface steel sheet piles is arranged; the main construction method is that the initially constructed slope surface is vertically driven with slope steel sheet piles, and a plurality of slope steel sheet piles are arranged along the slope in a transverse arrangement way.
The mode can improve the stability of the inside of the slope, avoid the sliding of the slope body caused by soil or ponding of the soil layer in the inside of the slope body, improve the reliability and safety of slope support, but the construction mode adopted by the mode is similar to the traditional construction mode of reinforcing steel bar net and concrete guniting, and the reinforcing steel bar net needs to be hung on a large scale on site, so that constructors need to bind the reinforcing steel bar net on the slope for a long time, the construction difficulty is high, the construction efficiency is low, and the falling risk of constructors is increased.
Meanwhile, in the practical construction process, the situation that a foundation pit is excavated to a certain depth and then is stopped for a period of time possibly occurs, in order to prevent the accident of slope collapse, the slope needs to be supported and protected, however, if the supporting structure is adopted, when the excavation of the lower soil body is continued, the upper supporting structure after construction is easy to influence the excavation of the lower soil body, and of course, the supporting structure in the known technology can avoid excavating equipment by upwards moving a certain distance when the lower soil body is excavated, but the supporting structure is complex in general structure, high in construction difficulty and easy to damage the overall stability of the slope soil body when the supporting structure is upwards moved.
There is therefore a need to propose a new solution to this problem.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a basement foundation pit slope supporting structure and a construction method, and the basement foundation pit slope supporting structure has the advantages of convenience and rapidness in construction and good supporting stability.
The technical aim of the invention is realized by the following technical scheme: basement foundation ditch side slope supporting construction, be formed with domatic on the foundation ditch side slope, supporting construction includes horizontal pole, protecting cover and first stock, the horizontal pole extends along domatic length direction, just the horizontal pole sets up to many along domatic width direction interval, in the soil body of domatic is fixed in to one end and horizontal pole fixed connection, the other end of first stock, the one end and the horizontal pole of protecting cover rotate to be connected, other end sliding connection have can hammer into the domatic second stock in the soil body, every protecting cover on the horizontal pole is arranged along domatic length direction and is set up to a plurality of, can dismantle respectively between each adjacent two protecting covers on domatic width direction and length direction and be connected with the bolt pole, has the interval between each adjacent two protecting covers on domatic width direction, be formed with the concrete placement chamber between protecting cover and the domatic, the top side of protecting cover sets up the mouth of pouring with the concrete placement chamber intercommunication.
In one embodiment, the cross rod comprises a plurality of steel pipes arranged along the length direction of the slope surface and a butt joint fastener for connecting and fixing every two adjacent steel pipes, and the cross rod is fixedly connected with the first anchor rod through the cross fastener.
In one embodiment, the protecting cover comprises a cover plate and surrounding plates surrounding the cover plate, the surrounding plates are arranged on one side close to the slope, hooks are fixedly connected to two sides of the top of the cover plate respectively, the hooks are rotatably mounted on the cross rod, guide limiting pieces capable of guiding the cross rod and limiting the cross rod in the hooks are fixedly connected to the end parts, close to the openings of the hooks, the guide limiting pieces are arc-shaped metal elastic pieces, and the pouring openings are elongated grooves formed in the surrounding plates located on the top side of the protecting cover.
In one embodiment, the cover plate is provided with a reinforcing mesh plate on the opposite surface of the slope, an inclined supporting plate is fixedly connected between the reinforcing mesh plates, the distance between the reinforcing mesh plate and the cover plate is larger than the height of the coaming, a Z shape is formed among the reinforcing mesh plate, the inclined supporting plate and the cover plate, deformation which enables the reinforcing mesh plate and the cover plate to be close to each other can be generated after the inclined supporting plate is stressed, and a plurality of anchor nails are arranged on one side of the reinforcing mesh plate close to the slope.
In one embodiment, a concrete layer is arranged in the concrete pouring cavity, and the steel bar mesh plate and the inclined strut plate are coated in the concrete layer.
In one embodiment, the supporting structure further comprises a third anchor rod, a plurality of anchor holes and a penetrable blocking layer for blocking the anchor holes are arranged at the relative positions of the slope on the protecting cover, and the third anchor rod is inserted into soil body of the slope after penetrating through the penetrable blocking layer.
In one embodiment, the protecting cover is fixedly welded with a bolt, the bolt rod is provided with a connecting hole capable of being penetrated on the bolt, and the bolt is in threaded connection with a nut for fixing the bolt rod.
The construction method of the basement foundation pit slope supporting structure comprises any one of the basement foundation pit slope supporting structures, and further comprises the following steps:
s1, initially constructing a slope;
s2, mounting a cross bar: hammering a first anchor rod into the slope according to the target distance, overlapping the cross rod at one end of the first anchor rod, which is far away from the slope, and fixedly connecting the cross rod with the first anchor rod through a cross fastener;
s3, mounting a protecting cover: a plurality of protecting covers are arranged on each cross rod side by side, and a second anchor rod on each protecting cover is hammered into soil body of the slope surface, so that the protecting covers cover the slope surface;
s4, installing a bolt rod: the bolt rod is fixedly connected between every two adjacent protecting covers in the width direction and the length direction of the slope;
s5, avoiding excavating equipment: when excavating equipment excavates the soil body of the next layer, firstly removing a bolt rod and a second anchor rod on the protecting cover of the lowest layer, and then upwards overturning the protecting cover of the lowest layer around a cross rod at the top of the protecting cover, so that the protecting cover of the lowest layer is far away from the soil body to be excavated, and the excavating equipment can conveniently excavate the soil body of the lower layer continuously, wherein the protecting cover of the lowest layer can be temporarily bound and fixed on the protecting cover of the upper layer through an iron wire after being overturned;
s6, restoring support: after the excavation of the soil body at the lower layer is completed, the protecting cover at the lowest layer is turned downwards to reset, the installation of the bolt rod and the second anchor rod on the protecting cover at the lowest layer is carried out again, and then the step S1 to the step S4 are repeated to install the supporting structure on the slope surface at the lower layer;
s7, finishing subsequent support: and (5) repeating the steps S1 to S6 to finish excavation and support of the foundation pit slope of the whole basement.
In one embodiment, after step S4 is completed, concrete is poured into the protecting covers except the protecting cover at the lowest layer of the current excavation depth, so that the concrete is solidified into layers in the concrete pouring cavity, and when the excavation of the whole foundation pit slope is completed, concrete pouring is performed on the protecting cover at the toe of the foundation pit slope.
In one embodiment, after step S4 is completed, the protecting cover corresponding to the slope with softer soil body can be reinforced, and the specific reinforcing method is as follows: and (3) penetrating the third anchor rod through the penetrable plugging layer and hammering the third anchor rod into the soil body.
In summary, the invention has the following beneficial effects:
1. according to the invention, the cross rod, the protecting cover, the first anchor rod and the second anchor rod can be customized in a factory, modular installation can be performed on site, binding or welding of a reinforcing mesh on a slope by a constructor is not needed, the construction method has the advantages of convenience and rapidness in installation and high construction efficiency, and in the construction process, the constructor can take the cross rod as a supporting point, so that the risk of stepping down and falling is reduced, and the construction safety is effectively improved;
2. through rotating the protecting cover and the cross rod to be connected, when the soil body at the lower layer is excavated, the protecting cover can be turned upwards, so that the protecting cover at the lowest layer is far away from the soil body needing to be excavated, the influence of a supporting structure on the excavation of the soil body at the lower layer is avoided, and the protecting cover at the lowest layer is turned, so that the integral stability of the soil body at the slope is not easy to damage, and the operation is simple, and the construction is convenient and quick;
3. through the setting of a plurality of protecting cover to set up concrete placement chamber in every protecting cover, can pour concrete layer in concrete placement intracavity and strengthen the stability of protecting cover to domatic support, can separate into a plurality of little square with domatic, make like this domatic shear stress can disperse each little square alone, the support structure is difficult to appear and wholly fail, cause the condition of domatic large tracts of land landslide, and through the setting of bolt, make all protecting covers keep away from domatic one side and connect as an organic wholely, so make have the traction of mutual traction between each protecting cover, be favorable to improving the stability to domatic whole support.
Drawings
FIG. 1 is a schematic structural view of a basement foundation pit slope support structure according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a front structure of a protecting cover in a basement foundation pit slope supporting structure according to an embodiment of the present application;
FIG. 3 is a schematic view of the back structure of a protecting cover in a basement foundation pit slope supporting structure according to an embodiment of the present application;
FIG. 4 is a cross-sectional view of a protective cover in a basement foundation pit slope support structure according to an embodiment of the present application;
fig. 5 is a block flow diagram of a construction method of a basement foundation pit side slope support structure according to an embodiment of the present application.
In the figure: 1. a slope; 2. a cross bar; 3. a protective cover; 31. a cover plate; 32. coaming plate; 321. pouring the port; 33. a hook; 34. a guide limit piece; 35. a reinforcing steel bar mesh plate; 351. anchoring nails; 36. a diagonal brace plate; 4. a first anchor rod; 5. a second anchor rod; 6. a bolt; 7. a bolt; 8. the plugging layer can be pierced.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 4, embodiments of the present application provide a basement foundation pit slope support structure, in which a slope surface 1 is formed on a foundation pit slope. The supporting structure comprises a cross rod 2, a protecting cover 3 and a first anchor rod 4, wherein the cross rod 2 extends along the length direction of the slope surface 1, and the cross rods 2 are arranged into a plurality of cross rods along the width direction of the slope surface 1 at intervals. One end of the first anchor rod 4 is fixedly connected with the cross rod 2, and the other end of the first anchor rod is fixed in the soil body of the slope surface 1. One end of the protecting cover 3 is rotationally connected with the cross rod 2, the other end of the protecting cover is slidably connected with a second anchor rod 5 which can be hammered into the soil body of the slope surface 1, and the second anchor rod 5 can be specifically a soil nail. The protecting covers 3 on each cross rod 2 are arranged in a plurality along the length direction of the slope surface 1, so that the gaps between two adjacent protecting covers 3 along the length direction of the slope surface 1 are smaller in order to reduce soil loss. A bolt rod 6 is detachably connected between every two adjacent protecting covers 3 in the width direction and the length direction of the slope surface 1. The distance is reserved between every two adjacent protecting covers 3 in the width direction of the slope surface 1, the distance is a yielding distance, the normal overturning of the protecting covers 3 can be met, and after the whole supporting structure is erected, concrete can be sprayed at the distance to prevent soil loss at the distance. A concrete pouring cavity is formed between the protecting cover 3 and the slope surface 1, and a pouring opening 321 communicated with the concrete pouring cavity is formed in the top side of the protecting cover 3.
In the arrangement, the cross rod 2, the protecting cover 3, the first anchor rod 4 and the second anchor rod 5 can be customized in a factory, modular installation can be performed on site, binding or welding of a reinforcing mesh is not required for constructors on the slope 1, the construction method has the advantages of convenience and rapidness in installation and high construction efficiency, in the construction process, the constructors can take the cross rod 2 as a supporting point, the risk of stepping on the ground and falling is reduced, and the construction safety is effectively improved;
through rotating the protecting cover 3 with the cross rod 2 and connecting, when excavating the soil body of the lower layer, the protecting cover 3 can be turned upwards, so that the protecting cover 3 of the lowest layer is far away from the soil body needing to be excavated, the supporting structure is prevented from influencing the excavation of the soil body of the lower layer, and the protecting cover 3 of the lowest layer is turned, so that the integral stability of the soil body of the slope 1 is not easy to damage, the operation is simple, and the construction is convenient and quick;
through the setting of a plurality of protecting cover 3 to set up concrete placement chamber in every protecting cover 3, can pour concrete layer at concrete placement intracavity and strengthen the stability that protecting cover 3 was strutted to domatic 1, can separate domatic 1 into a plurality of little square, make like this domatic 1's shear stress can disperse each little square only, support the whole inefficacy of structure is difficult to appear, cause the condition of domatic 1 large tracts of land landslide, and through the setting of bolt 6, make all protecting covers 3 keep away from domatic 1's one side and connect as an organic wholely, make like this have the traction force of mutual traction between each protecting cover 3, be favorable to improving the stability to domatic 1 whole struttes.
In this embodiment, the horizontal pole 2 includes the steel pipe that many edge slope 1 length direction set up and connects the butt joint fastener of fixed with every adjacent two steel pipes, horizontal pole 2 passes through cross fastener and 4 fixed connection of first stock.
Specifically, when the length of the slope 1 is longer, and the length of a single steel pipe can not meet the demand, a plurality of steel pipes are connected to form a target cross rod 2 by adopting a butt joint fastener, the first anchor rod 4 can be specifically in the form of a steel pipe and is hammered into the soil body by engineering machinery, wherein the butt joint fastener and the cross fastener are all common fasteners in the building field, and no illustration is made in the figure.
In this embodiment, the protecting cover 3 includes the apron 31 and encloses the bounding wall 32 of establishing around apron 31, the bounding wall 32 sets up in the one side that is close to domatic 1, the top both sides of apron 31 are fixedly connected with couple 33 respectively, couple 33 rotatably carries on horizontal pole 2, couple 33 is close to its open-ended tip fixedly connected with can be with horizontal pole 2 direction and spacing in the direction spacing piece 34 of couple 33, direction spacing piece 34 is an arc metal shrapnel, pour mouthful 321 for seting up rectangular shape fluting on the bounding wall 32 that is located protecting cover 3 topside.
Specifically, the cover 3 may be integrally formed by stamping from a thin steel plate.
The setting of above-mentioned structure, during the construction, with the couple 33 card of protecting cover 3 go into on horizontal pole 2 can accomplish the connection of protecting cover 3 and horizontal pole 2 fast, after the connection is accomplished, the spacing piece 34 elasticity resets of direction for couple 33 is difficult to break away from horizontal pole 2 along its opening part.
In this embodiment, be provided with bar screen plate 35 on the apron 31 in the opposite face of domatic 1, fixedly connected with diagonal brace plate 36 between the bar screen plate 35, the distance between bar screen plate 35 to the apron 31 is greater than the height of bounding wall 32, form the zigzag between bar screen plate 35, diagonal brace plate 36 and the apron 31, can produce the deformation that makes bar screen plate 35 and apron 31 be close to each other after the diagonal brace plate 36 atress, bar screen plate 35 is close to domatic 1's one side is provided with a plurality of anchor 351.
Through the arrangement, when the second anchor rod 5 is hammered into the soil, the reinforcing mesh plate 35 can be partially stuck tightly and sunk into the soil of the slope surface 1, and the compactness of the reinforcing mesh plate 35 in contact with the slope surface 1 is further enhanced through the arrangement of the anchor 351, so that after concrete is poured, the reinforcing mesh plate has better supporting stability compared with the binding reinforcing mesh of constructors in the traditional mode.
In this embodiment, a concrete layer is disposed in the concrete pouring cavity, and the reinforcing mesh plate 35 and the diagonal brace plate 36 are coated in the concrete layer.
In this embodiment, the supporting structure further includes a third anchor rod, a plurality of anchor holes and a penetrable blocking layer 8 for blocking the plurality of anchor holes are disposed at the opposite positions of the slope 1 on the protecting cover 3, and the third anchor rod penetrates through the penetrable blocking layer 8 and is then inserted into the soil body of the slope 1.
Specifically, the penetrable plugging layer 8 may be specifically a mylar aluminum foil, a rubber sheet, a sheet iron or the like adhered to the anchor hole, that is, if the penetrable plugging layer can plug the anchor hole, concrete grout cannot overflow, and the third anchor rod can be penetrated.
In this embodiment, the protecting cover 3 is fixedly welded with a bolt 7, the bolt 6 is provided with a connecting hole capable of being penetrated through the bolt 7, and the bolt 7 is connected with a nut for fixing the bolt 6.
As shown in fig. 1 to 5, the application also discloses a construction method of the basement foundation pit slope supporting structure, which comprises any one of the basement foundation pit slope supporting structures, and further comprises the following steps:
s1, initially constructing a slope 1;
s2, installing a cross bar 2: hammering a first anchor rod 4 into the slope 1 according to a target distance, overlapping the cross rod 2 at one end of the first anchor rod 4 far away from the slope 1, and fixedly connecting the cross rod 2 with the first anchor rod 4 through a cross fastener;
s3, mounting a protecting cover 3: a plurality of protecting covers 3 are arranged on each cross rod 2 side by side, and a second anchor rod 5 on the protecting covers 3 is hammered into the soil body of the slope surface 1, so that the protecting covers 3 cover the slope surface 1;
s4, mounting a bolt 6: the bolt rod 6 is fixedly connected between every two adjacent protecting covers 3 positioned in the width direction and the length direction of the slope surface 1;
s5, avoiding excavating equipment: when excavating equipment excavates the soil body of the next layer, firstly removing the bolt 6 and the second anchor rod 5 on the protecting cover 3 of the lowest layer, and then turning the protecting cover 3 of the lowest layer upwards around the cross rod 2 at the top of the protecting cover, so that the protecting cover 3 of the lowest layer is far away from the soil body to be excavated, and the excavating equipment can conveniently excavate the soil body of the lower layer continuously;
s6, restoring support: after the excavation of the soil body at the lower layer is completed, the protecting cover 3 at the lowest layer is turned downwards to reset, the installation of the bolt 6 and the second anchor rod 5 on the protecting cover 3 at the lowest layer is carried out again, and then the installation of the supporting structure on the slope surface 1 at the next layer is repeated from the step S1 to the step S4;
s7, finishing subsequent support: and (5) repeating the steps S1 to S6 to finish excavation and support of the foundation pit slope of the whole basement.
In this embodiment, after step S4 is completed, concrete is poured into the protecting covers 3 except the protecting cover 3 at the lowest layer of the current excavation depth, so that the concrete is solidified into layers in the concrete pouring cavity, and when the excavation of the whole foundation pit slope is completed, concrete pouring is performed on the protecting covers 3 at the toe of the foundation pit slope.
In this embodiment, after step S4 is completed, the protecting cover 3 corresponding to the slope 1 with a softer soil body may be reinforced, and the specific reinforcing method is as follows: the third anchor rod penetrates the penetrable plugging layer 8 and is hammered into the soil body.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (10)
1. Basement foundation ditch side slope supporting construction, be formed with domatic (1), its characterized in that on the foundation ditch side slope: the supporting structure comprises a cross rod (2), a protecting cover (3) and a first anchor rod (4), wherein the cross rod (2) extends along the length direction of a slope surface (1), the cross rod (2) is arranged into a plurality of pieces along the width direction interval of the slope surface (1), one end of the first anchor rod (4) is fixedly connected with the cross rod (2) and the other end of the first anchor rod is fixed in the soil body of the slope surface (1), one end of the protecting cover (3) is rotationally connected with the cross rod (2), the other end of the protecting cover is slidingly connected with a second anchor rod (5) which can be hammered into the soil body of the slope surface (1), the protecting covers (3) on the cross rod (2) are arranged to be a plurality of pieces along the length direction of the slope surface (1), a bolt (6) is detachably connected between every two adjacent protecting covers (3) on the width direction and the length direction of the slope surface (1), a concrete pouring cavity is formed between the protecting cover (3) and the slope surface (1), and the concrete pouring cavity (321) is communicated with the concrete pouring cavity (321).
2. The basement foundation pit slope support structure of claim 1, wherein: the cross rod (2) comprises a plurality of steel pipes which are arranged along the length direction of the slope surface (1) and a butt joint fastener which is used for connecting and fixing every two adjacent steel pipes, and the cross rod (2) is fixedly connected with the first anchor rod (4) through the cross fastener.
3. The basement foundation pit slope support structure of claim 1, wherein: the protecting cover (3) comprises a cover plate (31) and surrounding plates (32) surrounding the cover plate (31), the surrounding plates (32) are arranged on one side close to the slope (1), hooks (33) are fixedly connected to the two sides of the top of the cover plate (31) respectively, the hooks (33) are rotatably mounted on the cross rod (2), guide limiting pieces (34) capable of guiding and limiting the cross rod (2) in the hooks (33) are fixedly connected to the end portions, close to the openings, of the hooks (33), of the hooks, the guide limiting pieces (34) are arc-shaped metal elastic sheets, and pouring openings (321) are rectangular grooves formed in the surrounding plates (32) located on the top side of the protecting cover (3).
4. A basement foundation pit slope support structure according to claim 3, wherein: the steel bar mesh plate (35) is arranged on the cover plate (31) on the opposite surface of the slope surface (1), the inclined support plates (36) are fixedly connected between the steel bar mesh plates (35), the distance between the steel bar mesh plates (35) and the cover plate (31) is larger than the height of the coaming (32), Z-shaped structures are formed between the steel bar mesh plates (35), the inclined support plates (36) and the cover plate (31), deformation enabling the steel bar mesh plates (35) and the cover plate (31) to be close to each other can be generated after the inclined support plates (36) are stressed, and a plurality of anchor nails (351) are arranged on one side, close to the slope surface (1), of the steel bar mesh plates (35).
5. The basement foundation pit slope support structure of claim 4, wherein: the concrete pouring cavity is internally provided with a concrete layer, and the reinforced net plate (35) and the inclined strut plate (36) are coated in the concrete layer.
6. The basement foundation pit slope support structure of claim 1, wherein: the supporting structure further comprises a third anchor rod, a plurality of anchor holes and a puncturable blocking layer (8) for blocking the anchor holes are arranged at the relative positions of the protecting cover (3) on the slope (1), and the third anchor rod is inserted into the soil body of the slope (1) after penetrating through the puncturable blocking layer (8).
7. The basement foundation pit slope support structure of claim 1, wherein: the novel protective cover is characterized in that a bolt (7) is fixedly welded on the protective cover (3), a connecting hole capable of being arranged on the bolt (7) in a penetrating mode is formed in the bolt (6), and a nut used for fixing the bolt (6) is connected to the bolt (7) in a threaded mode.
8. A construction method of a basement foundation pit slope supporting structure, comprising the basement foundation pit slope supporting structure according to any one of claims 1-7, characterized in that: the method also comprises the following steps:
s1, initially constructing a slope (1);
s2, a mounting cross rod (2): hammering a first anchor rod (4) into the slope (1) according to the target distance, overlapping the cross rod (2) at one end of the first anchor rod (4) far away from the slope (1), and fixedly connecting the cross rod (2) with the first anchor rod (4) through a cross fastener;
s3, mounting a protecting cover (3): a plurality of protecting covers (3) are arranged on each cross rod (2) side by side, and a second anchor rod (5) on the protecting covers (3) is hammered into the soil body of the slope (1) so that the protecting covers (3) cover the slope (1);
s4, installing a bolt rod (6): the bolt rod (6) is fixedly connected between every two adjacent protecting covers (3) positioned in the width direction and the length direction of the slope (1);
s5, avoiding excavating equipment: when excavating equipment excavates the soil body of the next layer, firstly removing a bolt rod (6) and a second bolt rod (5) on a protecting cover (3) of the lowest layer, and then upwards overturning the protecting cover (3) of the lowest layer around a cross rod (2) at the top of the protecting cover, so that the protecting cover (3) of the lowest layer is far away from the soil body to be excavated, and the excavating equipment can conveniently excavate the soil body of the lower layer continuously;
s6, restoring support: after the excavation of the soil body at the lower layer is completed, the protecting cover (3) at the lowest layer is turned downwards to reset, the installation of the bolt rod (6) and the second anchor rod (5) on the protecting cover (3) at the lowest layer is carried out again, and then the installation of the supporting structure of the slope (1) at the next layer is carried out by repeating the steps S1 to S4;
s7, finishing subsequent support: and (5) repeating the steps S1 to S6 to finish excavation and support of the foundation pit slope of the whole basement.
9. The construction method of the basement foundation pit slope supporting structure according to claim 8, wherein: and after the step S4 is completed, pouring concrete in other protecting covers (3) except the protecting cover (3) at the lowest layer of the current excavation depth, so that the concrete is solidified into layers in the concrete pouring cavity, and when the excavation of the whole foundation pit slope is completed, pouring the concrete on the protecting covers (3) at the toe of the foundation pit slope.
10. The construction method of the basement foundation pit slope supporting structure according to claim 8, wherein: after the step S4 is completed, the protecting cover (3) corresponding to the slope (1) with soft soil body can be reinforced, and the concrete reinforcing method comprises the following steps: the third anchor rod penetrates through the penetrable plugging layer (8) and is hammered into the soil body.
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| CN202311388134.0A CN117306546A (en) | 2023-10-25 | 2023-10-25 | Basement foundation pit slope supporting structure and construction method |
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| CN202311388134.0A CN117306546A (en) | 2023-10-25 | 2023-10-25 | Basement foundation pit slope supporting structure and construction method |
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