CN207047870U - A kind of combined bolting and shotcrete device - Google Patents

Abstract

The utility model provides a spray anchor supporting device, which comprises a horizontal channel steel, a vertical channel steel and a prestressed anchor cable. The prestressed anchor cable is vertically arranged at the intersection of the bracket, and the prestressed anchor cable is inclined to go deep into the soil body, and the prestressed anchor cable includes a free section of the anchor cable and an anchor section of the anchor cable, and the anchor section of the anchor cable The gap between the anchor cable and the supporting soil is filled with cement, the anchor cable of the free section of the anchor cable is covered with a casing, the gap between the casing and the supporting soil is filled with cement, the surface of the supporting soil and the A shotcrete surface is provided between the well-shaped supports. The utility model can improve the overall rigidity and stability of the spray-anchor support, can effectively control the deformation, and expand the use range of the spray-anchor support; it can replace support forms such as row piles or underground continuous walls, which can shorten the construction period and reduce the cost. Achieve significant economic and social benefits.

Description

A spray anchor support device

technical field

The utility model relates to a deep foundation pit support structure, in particular to a spray anchor support system.

Background technique

Shotcrete anchor support is a support form composed of anchor rods (cables), soil, sprayed concrete panels and surrounding structures. This composite can strengthen the structural surface and layer of the soil, and improve the integrity and self-sufficiency of the soil. bearing capacity and inhibit the development of deformation. In the joint work of support and soil, it can effectively control and adjust the redistribution of soil stress, avoid soil loosening and collapse, and enhance the stability of soil. Its characteristic is that the anchor cable can be prestressed to restrain the deformation of the slope. It has the characteristics of convenient construction, low noise, parallel flow operation with earthwork excavation, shortened construction period, and low cost.

In spray anchor support, the channel steel enclosure is a beam that transmits the tension between the support structure and the anchor rod (cable), and is generally arranged horizontally, which can connect the anchor cables in the horizontal direction into a line, which can improve the stability of the support structure.

At present, spray anchor support often needs to be placed on a certain slope to ensure its safety and deformation. The larger the grading space, the better. Nowadays, there are more and more restrictions on building construction space, higher requirements for the protection of adjacent buildings, and smaller and smaller deformation of support structures. People gradually tend to piles, internal supports, underground diaphragm walls, etc. Supporting structures with small deformation, but these support schemes often have high cost, long construction period and difficult construction.

Contents of the invention

The utility model aims to provide a utility model to achieve the purposes of simple structure and small deformation.

In view of this, the technical solution of the utility model is achieved in that:

A spray anchor supporting device, comprising horizontal channel steel, vertical channel steel and prestressed anchor cables, the horizontal channel steel and the vertical channel steel are intersected to form a well-shaped support, and the intersection of the well-shaped support is vertical The prestressed anchor cable is provided, and the prestressed anchor cable is inclined to go deep into the soil body. The prestressed anchor cable includes a free section of the anchor cable and an anchor section of the anchor cable. The gap between the soil protection body is filled with cement, the anchor cable jacket of the free section of the anchor cable is provided with a casing, the gap between the casing and the supporting soil body is filled with cement, and the gap between the surface layer of the supporting soil body and the well-shaped support is Features a shotcrete finish.

Further, the vertical channel steels are equidistantly provided with engaging grooves, and the engaging grooves can be intersected with the horizontal channel steels, and the horizontal channel steels and the vertical channel steels are provided at intersections for The hole through which the top of the prestressed anchor cable passes, and the top of the prestressed anchor cable is provided with a backing plate and an anchor to fix it.

Further, the outer circumference of the part where the prestressed anchor cable goes deep into the soil body is provided with a plurality of parallel strip-shaped grooves along the axial direction.

Further, the outer circumference of the part where the prestressed anchor cable goes deep into the soil body is provided with a plurality of parallel reinforcing ribs in the radial direction.

Further, the shotcrete surface layer is provided with a two-way reinforcement mesh for the surface layer.

Further, the sprayed anchor support device also includes a drainage pipe, one end of which extends to the supporting soil and a filter screen is provided at the end of the drainage pipe, and the other end extends out of the shotcrete surface layer.

Further, a cover is provided above the anchor.

Compared with the prior art, the spray anchor support device described in the utility model has the following advantages:

The utility model distributes the anchor cables of the support section in a rectangular manner, and uses two-way channel steel enclosures to connect not only the horizontal anchor cables but also the vertical anchor cables to form a whole, which can increase the spray anchor support. Integrity and stability can also effectively control deformation, and the grading space of the support structure can be reduced accordingly, which can greatly increase the applicability of the sprayed anchor support.

Description of drawings

The accompanying drawings constituting a part of the utility model are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is the schematic diagram of the well-shaped bracket described in the embodiment of the present invention;

Fig. 2 is a structural schematic diagram of the spray anchor support device described in the embodiment of the present invention;

Fig. 3 is a schematic cross-sectional view of the prestressed anchor cable 3 described in the embodiment of the present invention;

Explanation of reference signs:

1-horizontal channel steel; 2-vertical channel steel; 21-engagement groove; 3-prestressed anchor cable; 31-free section of anchor cable; 311-casing; 32-anchor cable anchor section; 33-reinforcing rib; 34-strip groove; 4-backing plate; 5-anchor; 51-cover; 6-sprayed concrete surface; filter screen; 8-support soil.

detailed description

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In describing the present invention, it should be understood that the terms "transverse", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention through specific situations.

The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments:

Referring to Figures 1 and 2, a typical embodiment of the utility model provides a spray anchor support device, including a horizontal channel steel 1, a vertical channel steel 2 and a prestressed anchor cable 3, the horizontal channel steel 1 and the The vertical channel steel 2 crosses to form a well-shaped support, and the intersection of the well-shaped support is vertically provided with the prestressed anchor cable 3, and the prestressed anchor cable 3 is inclined to go deep into the soil body 8, and the prestressed anchor cable 3 The stress anchor cable 3 includes an anchor cable free section 31 and an anchor cable anchor section 32, the gap between the anchor cable of the anchor cable anchor section 32 and the supporting soil 8 is filled with cement 321, and the anchor cable jacket of the anchor cable free section 31 A casing 311 is provided, and the gap between the casing 311 and the supporting soil body 8 is filled with cement 321, and a shotcrete surface layer 6 is provided between the surface layer of the supporting soil body 8 and the well-shaped support.

The anchor cables of the support section are distributed rectangularly, and the two-way channel steel enclosure is used to connect not only the horizontal anchor cables, but also the vertical anchor cables to form a whole, which can increase the integrity and safety of the spray anchor support. Stability can also effectively control deformation, and the grading space of the support structure can also be correspondingly reduced, which can greatly increase the applicability of spray anchor support; the anchor cable of the anchor cable anchor section 32 of the prestressed anchor cable 3 and The gap between the supporting soil 8 is filled with cement 321 to improve its firmness with the soil; the anchor cable jacket of the free section 31 of the anchor cable is provided with a casing 311 to prevent it from interfering with the casing 311 and the supporting soil. The cement 321 filled between 8 is in contact with each other to increase the activity space for tension locking; the shotcrete surface layer 6 plays a protective role in supporting the surface layer of the soil body 8 and reduces force deformation.

The vertical channel steel 2 is equidistantly provided with engaging grooves 21, and the engaging groove 21 can be engaged and intersected with the horizontal channel steel 1, and the horizontal channel steel 1 and the vertical channel steel 2 are provided at intersections. There is a hole for the top of the prestressed anchor cable 3 to pass through, and the top of the prestressed anchor cable 3 is provided with a backing plate 4 and an anchor 5 to fix it. The backing plate 4 is sleeved on the prestressed anchor cable 3, and the prestressed anchor cable 3 is closely connected with the horizontal channel steel 1 and the vertical channel steel 2 through the anchorage 5, thereby enhancing the overall stability. A cover 51 is also provided above the anchor 5, and the purpose of the cover 51 is to prevent the anchor 5 and the backing plate 4 from rusting, thus affecting the tightening and opening of the prestressed anchor cable 3.

Referring to FIG. 3 , in the preferred embodiment described above, the outer circumference of the portion where the prestressed anchor cable 3 penetrates into the supporting soil 8 is provided with a plurality of parallel strip-shaped grooves 34 along the axial direction. The strip-shaped groove 34 can enhance the gripping force between the prestressed anchor cable 3 and the supporting soil body 8 and improve stability.

In the above-mentioned preferred embodiment, the outer circumference of the part where the prestressed anchor cable 3 goes deep into the supporting soil 8 is provided with a plurality of parallel reinforcing ribs 33 along the radial direction. The reinforcing rib 33 can enhance the gripping force between the prestressed anchor cable 3 and the supporting soil 8, and improve stability.

In the above-mentioned preferred embodiment, the shotcrete surface layer 6 is provided with a surface layer two-way reinforcement mesh 61 . The two-way reinforcement mesh 61 of the surface layer can enhance the strength of the shotcrete surface layer 6 and further improve the stability.

In the preferred embodiment above, the spray anchor support device also includes a drainage pipe 7, one end of the drainage pipe 7 extends to the supporting soil 8 and a filter screen 71 is provided at its end, and the other end protrudes out to spray Concrete surface 6. The drainage pipe 7 can effectively reduce the water accumulation in the supporting soil 8 and reduce the water damage to the shotcrete surface layer 6 .

The use process of the utility model:

The first step is the construction of the prestressed anchor cable 3. The first row of prestressed anchors is carried out according to the procedures of trimming the slope, measuring and releasing the hole position of the prestressed anchor cable, forming the hole to the designed hole depth, inserting the prestressed anchor cable, and performing grouting. Cable 3 construction, anchor cable construction should ensure the length of free section 31 (greater than 5m) and 2 anchor section 32;

The second step is to carry out the shotcrete 6, which is carried out according to the procedures of trimming the slope, measuring and setting out, plain spraying, binding steel mesh, concrete spraying and curing, to ensure that the binding of the two-way steel mesh 61 on the surface layer meets the design requirements of the specification, and to ensure the thickness of the shotcrete 6 Meet the design requirements;

In the third step, when the free section 31 of the anchor cable, the anchor section 32 of the anchor cable and the sprayed concrete surface layer 6 reach 80% of the design strength, the horizontal channel steel 1 is drilled and processed, and the first row of anchor cables is connected and put on respectively. Backing plate 4 and anchorage 5 are used to tension the anchor cable and provide tension locking force according to the design requirements;

The fourth step is earthwork excavation, repeat the first step to the third step, and carry out the construction tensioning of the second row of prestressed anchor cables 3;

The fifth step is to drill the vertical channel steel 2, connect the first row of anchor cables and the second row of anchor cables, put on the backing plate 4 and anchor 5, perform secondary tension and lock, and connect the horizontal channel steel 1 and the vertical channel steel 2 are connected as a whole;

The sixth step is to install the cover body 51 above the above-mentioned anchor 5 .

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (7)

1. A spray anchor supporting device, comprising a horizontal channel steel (1), a vertical channel steel (2) and a prestressed anchor cable (3), the horizontal channel steel (1) and the vertical channel steel (2) Crosses are arranged to form a well-shaped support, and the intersection of the well-shaped support is vertically provided with the prestressed anchor cable (3), and the prestressed anchor cable (3) is inclined to deeply support the soil (8). In that, the prestressed anchor cable (3) includes an anchor cable free section (31) and an anchor cable anchor section (32), and the anchor cable anchor section (32) fills the gap between the anchor cable and the supporting soil (8) There is cement (321), the anchor cable jacket of the anchor cable free section (31) is provided with a casing (311), and the gap between the casing (311) and the supporting soil (8) is filled with cement (321), A sprayed concrete surface layer (6) is arranged between the surface layer of the supporting soil body (8) and the well-shaped support. 2. A spray anchor support device according to claim 1, characterized in that the vertical channel steel (2) is provided with engagement grooves (21) at equal intervals, and the engagement grooves (21 ) can be engaged and intersected with the horizontal channel steel (1), and the horizontal channel steel (1) and the vertical channel steel (2) are provided with a hole at the intersection where the top end of the prestressed anchor cable (3) can pass through. The top of the prestressed anchor cable (3) is provided with a backing plate (4) and an anchor (5) for fixing it. 3. A spray anchor support device according to claim 2, characterized in that, the outer circumference of the part where the prestressed anchor cable (3) goes deep into the soil (8) is provided with a plurality of parallel anchors along the axial direction. The strip groove (34). 4. A spray anchor support device according to claim 2, characterized in that, the outer circumference of the part where the prestressed anchor cable (3) penetrates into the soil body (8) is provided with a plurality of parallel bolts along the radial direction. ribs (33). 5. A sprayed anchor supporting device according to claim 4, characterized in that, the sprayed concrete surface (6) is provided with a two-way reinforcement mesh (61) for the surface. 6. A spray anchor support device according to claim 3, characterized in that, the spray anchor support device further comprises a drainage pipe (7), and one end of the drainage pipe (7) extends to the supporting soil (8) and a filter screen (71) is provided at its end, and the other end protrudes from the shotcrete surface (6). 7. The spray anchor supporting device according to claim 2, characterized in that, a cover (51) is also provided above the anchor (5).