CN209989819U - Foundation pit slope supporting structure - Google Patents

Abstract

The utility model discloses a foundation pit slope supporting construction, including the anchor pole, the anchor head, the support rack, cut the diagonal bar, water guide canal and wash port, the anchor pole is square matrix and tamps into the foundation pit slope respectively perpendicularly in, the outer end of anchor pole exposes domaticly, the bottom surface and the anchor pole outer end fixed connection of anchor head, the first inside cross passageway that all is equipped with of anchor, and the top surface of anchor head is equipped with the connector, the support rack includes horizontal support frame and perpendicular support frame, horizontal support frame level respectively runs through the passageway, erect the support frame vertical through the passageway respectively, it connects each other between the connector at the apex angle to cut the diagonal bar respectively, the water guide canal sets up on the level ground of foundation pit slope top, the wash port level respectively sets up the inside at the side slope, and the export of wash port is located the support rack. In a word, the utility model has the advantages of novel structure, the construction degree of difficulty is low, strut effectually.

Description

A kind of foundation pit slope support structure

technical field

The utility model belongs to the technical field of construction engineering, in particular to a foundation pit slope supporting structure.

Background technique

The foundation pit support project is a temporary project, and the designed safety reserve can be relatively small, but it is related to the region. Geological conditions in different regions have different characteristics. Foundation pit support engineering is also an interdisciplinary subject of geotechnical engineering, structural engineering and construction technology. Due to the high cost of the foundation pit support project and the large number of starts, it is the focus of the construction units. Due to the complex technology, a wide range of involved, many changing factors, and frequent accidents, it is the most challenging technical difficulty in construction projects. At the same time, it is also the focus of reducing project cost and ensuring project quality.

As a structural system, foundation pit support should meet the requirements of stability and deformation, that is, the requirements of the two limit states usually mentioned in the specification, namely the limit state of bearing capacity and the limit state of normal service. The so-called limit state of bearing capacity, for foundation pit support, is the failure of the support structure, dumping, sliding or damage of the surrounding environment, resulting in a large range of instability. The general design requirements do not allow the support structure to appear in this limit state. The normal service limit state refers to the deformation of the supporting structure or the excessive deformation of the surrounding soil caused by the excavation, which affects the normal use, but does not cause the instability of the structure.

Utility model content

In view of the above existing problems, the utility model provides a foundation pit slope support structure.

The technical scheme provided by the utility model is: a foundation pit slope support structure, which mainly includes anchor rods, anchor heads, support grids, shear diagonal bars, aqueducts and drainage holes. They are vertically rammed into the slope of the foundation pit in a square matrix, and the outer ends of the anchoring rods are exposed to the slope surface. There are a plurality of anchoring heads. The bottom surface of the anchoring heads is fixedly connected with the outer ends of the anchoring rods. and the top surface of the anchoring head is provided with a connecting head, and the support grid includes a horizontal support frame and a vertical support frame. There are a plurality of vertical support frames, which vertically penetrate the passages, and there are a plurality of the shear diagonal bars, which are respectively connected between the joints that are at the top angles of each other, and the aqueduct is arranged on the horizontal ground above the slope of the foundation pit. Above, there are a plurality of the drainage holes, which are arranged horizontally inside the slope, and the outlet of the drainage holes is located in the support grid.

Further, the surface of the foundation pit is sprayed with a concrete protective layer, and the concrete protective layer can strengthen the surface of the side slope of the foundation pit and avoid landslides on the side slope.

Further, the horizontal support frame and the vertical support frame are fixedly welded with the outer anchoring head of the foundation pit slope to strengthen the fixing effect and prevent the horizontal support frame and the vertical support frame from being separated from the outer anchoring head.

Further, the diameters of the transverse support frame and the vertical support frame are both smaller than half of the diameter of the passage, so that the transverse support frame and the vertical support frame can penetrate the passage at the same time.

Further, prestressing is applied to the diagonal shear bars, and the prestressing can generate prestressing tension inside the supporting grid, thereby enhancing the stability of the supporting structure.

Further, the aqueduct is parallel to the upper edge of the slope of the foundation pit, so that the water above the side slope is drained away through the aqueduct, so as to prevent the rainwater from scouring the surface of the slope and causing the slope to landslide.

The construction method of the utility model is as follows: surveying the geological conditions of the slope of the foundation pit, determining the position of the anchoring rod, after welding the anchoring head and the anchoring rod, ramming the anchoring rod into the interior of the slope according to the position point, and rotating the direction of the anchoring head so that a straight line The cross-shaped channels in the anchoring head are respectively on the same straight line, and then the transverse support rod and the vertical support rod are respectively penetrated into the channel, and the connection between the transverse support rod and the vertical support rod and the outer anchoring head is welded. The shear bars connect the connectors on the two anchoring heads that are at the top angle of each other, apply prestress to the shear bars and fix them, spray a layer of concrete on the surface of the slope, and dig drainage holes on the surface of the slope after solidification. An aqueduct shall be dug on the level ground above the slope.

Compared with the prior art, the beneficial effects of the present utility model are as follows: the utility model provides a foundation pit slope support structure, an anchoring head is fixedly arranged at the outer end of the anchoring rod, and a cross-shaped channel is arranged inside the anchoring head, so that the The transverse support frame and the vertical support frame respectively penetrate the channel and are fixed with the anchoring head, support the slope by means of multi-point fixing, and connect the two anchoring heads which are at the apex of each other with a prestressed anchorage head. Shearing the diagonal reinforcement can generate prestressed tension inside the support structure and enhance the stability of the support structure, and spraying a concrete layer on the surface of the slope can strengthen the surface of the slope of the foundation pit and avoid landslides on the slope. In a word, the utility model has the advantages of novel structure, low construction difficulty, good supporting effect and the like.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present utility model;

Fig. 2 is the structural schematic diagram of the anchoring head of the present invention;

3 is a sectional view of the anchoring head of the present invention;

Figure 4 is a schematic diagram of the structure of the support grid of the present invention.

Among them, 1-anchor rod, 2-anchor head, 21-channel, 22-connector, 3-support grid, 31-horizontal support, 32-vertical support, 4-shear diagonal bar, 5- Aqueduct, 6-drainage hole.

Detailed ways

In order to facilitate the understanding of the technical solutions of the present utility model, the present utility model will be further explained below with reference to the accompanying drawings 1-4 and specific embodiments, which do not constitute a limitation on the protection scope of the present utility model.

As shown in Figure 1, a foundation pit slope support structure mainly includes an anchor rod 1, an anchor head 2, a support grid 3, a shear diagonal bar 4, an aqueduct 5 and a drainage hole 6;

There are many anchor rods 1, which are vertically rammed into the slope of the foundation pit in a square matrix. The outer end of the anchor rod 1 is exposed to the slope surface, and there are many anchor heads 2. The bottom surface of the anchor head 2 is fixedly connected with the outer end of the anchor rod 1. ;

As shown in Figure 2-3, the anchoring head 2 is provided with a cross-shaped channel 21 inside, and the top surface of the anchoring head 2 is provided with a connecting head 22;

As shown in FIG. 4 , the support grid 3 includes a horizontal support frame 31 and a vertical support frame 32. There are a plurality of horizontal support frames 31, which penetrate the channel 21 horizontally, and a plurality of vertical support frames 32, which are respectively vertical. Straight through the channel 21, the diameters of the transverse support frame 31 and the vertical support frame 32 are one-fourth of the diameter of the channel 21. Welding is fixed to strengthen the fixing effect and prevent the horizontal support frame 31 and the vertical support frame 32 from being separated from the outer anchoring head. Prestressing force is applied to the diagonal bars 4, which can generate prestressing tension inside the support grid 3 to strengthen the stability of the support structure. The surface of the foundation pit is sprayed with a concrete protective layer, which can strengthen the slope of the foundation pit. surface to avoid landslides on slopes;

The aqueduct 5 is arranged on the horizontal ground above the slope of the foundation pit, and the aqueduct 5 is parallel to the upper edge of the slope of the foundation pit, so that the water above the side slope is drained through the aqueduct to avoid rainwater scouring the surface of the side slope and causing the side slope to landslide. There are a plurality of drainage holes 6 , which are respectively arranged horizontally inside the side slope, and the outlet of the drainage holes 6 is located in the support grid 3 .

The construction method of this embodiment is as follows: survey the geological conditions of the foundation pit slope, determine the position of the anchor rod 1, weld the anchor head 2 and the anchor rod 1, and ram the anchor rod 1 into the slope according to the position point, rotate the direction of the anchor head 2 , so that the cross-shaped channels 21 in the anchoring head 2 on a straight line are respectively on the same straight line, and then the transverse support rod 31 and the vertical support rod 32 are respectively penetrated into the channel 21, and the transverse support rod 31 and the vertical support rod The rod 32 is welded with the connection of the outer anchoring head, and the connecting joints on the two anchoring heads 2 that are at the top angle of each other are connected by the diagonal shear bars 4, and the shear diagonal bars 4 are prestressed and fixed, and a layer of a layer is sprayed on the surface of the slope. After the concrete layer is solidified, a drainage hole 6 is dug on the surface of the side slope, and an aqueduct 5 is dug on the horizontal ground above the side slope.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions in the embodiments of the present invention. .

Claims (6)

1. a foundation pit slope support structure, is characterized in that, mainly comprises anchoring rod (1), anchoring head (2), support grid (3), shearing rib (4), aqueduct (5) and drainage holes (6); There are a plurality of said anchor rods (1), which are vertically rammed into the slope of the foundation pit in a matrix, and the outer ends of the anchor rods (1) are exposed on the slope; There are multiple anchoring heads (2), the bottom surface of the anchoring head (2) is fixedly connected with the outer end of the anchoring rod (1), and a cross-shaped channel (21) is provided inside the anchoring head (2), and the anchoring head ( 2) The top surface is provided with a connector (22); The support net frame (3) includes a transverse support frame (31) and a vertical support frame (32). There are a plurality of the vertical support frames (32), which vertically penetrate the passages (21) respectively; There are a plurality of said diagonal shear ribs (4), which are respectively connected between the connecting heads (22) which are vertices of each other; The aqueduct (5) is arranged on the horizontal ground above the slope of the foundation pit; There are a plurality of the drainage holes (6), which are respectively arranged horizontally inside the side slope, and the outlet of the drainage holes (6) is located in the support grid (3). 2 . The foundation pit slope support structure according to claim 1 , wherein a concrete protective layer is sprayed on the surface of the foundation pit. 3 . 3. A kind of foundation pit slope support structure according to claim 1, is characterized in that, described transverse support frame (31), vertical support frame (32) and foundation pit slope outer layer anchoring head ( 2) Fixed welding. 4. A foundation pit slope support structure according to claim 1, characterized in that the diameters of the transverse support frame (31) and the vertical support frame (32) are both smaller than the diameter of the passage (21) Half. 5 . A foundation pit slope support structure according to claim 1 , wherein prestressing is applied to the diagonal shear bars ( 4 ). 6 . 6 . The foundation pit slope support structure according to claim 1 , wherein the aqueduct ( 5 ) is parallel to the upper edge of the foundation pit slope. 7 .

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