CN205421309U - A umbellate form rock stock basis for transmission line engineering - Google Patents

Abstract

The utility model discloses an umbrella-shaped rock bolt foundation for power transmission line engineering, which comprises a cylindrical upper bearing platform and a foundation bearing platform, the upper bearing platform and the foundation bearing platform are overlapped and connected by anchor bolts , with the center O of the bottom surface of the foundation cap as the center and the radius R as the center, non-penetrating vertical anchor holes are evenly arranged, and the lower side of the foundation cap is inclined and symmetrical along the axis line of the foundation cap. Equal non-penetrating inclined anchor holes, vertical anchor holes and inclined anchor holes are arranged alternately, the vertical anchor holes are fixed with vertical anchor rods by adhesive, and the inclined anchor holes are fixed with inclined anchor rods by adhesive. Its simple structure and compact connection can save costs under the premise of bearing high transmission line voltage and large tower load.

Description

Umbrella Rock Bolt Foundation for Transmission Line Engineering

technical field

The utility model relates to a rock bolt foundation, in particular to an umbrella-shaped rock bolt foundation used in power transmission line engineering.

Background technique

In power grid construction, the investment in basic engineering accounts for about 15% to 20% of the total investment in the project. The optimal design of the tower foundation plays a pivotal role in reducing engineering investment, saving resources, reducing earthwork and protecting the environment.

In the past, the voltage level of the line engineering was not high, and the foundation load was not large. For the slightly weathered and moderately weathered rock areas, the anchor foundation can adopt single anchor or straight anchor group anchor foundation.

With the development of my country's electric power construction, the voltage level of transmission lines is getting higher and higher, the load of towers is getting bigger and bigger, and the foundation force is also increasing. In this way, the conventional straight anchor type is difficult to meet the requirements; if the straight anchor type group anchor foundation is adopted, due to the large number of anchor bolts and the circular arrangement of the anchor bolts, the size of the upper cap is too large, resulting in waste of concrete and loss of the anchor bolt foundation. economic advantage.

Therefore, a rock bolt foundation that can withstand high transmission line voltage and large tower load and has good economic benefits for transmission line engineering is very necessary.

Contents of the invention

The purpose of this utility model is to provide an umbrella-shaped rock bolt foundation for transmission line engineering with simple structure and compact connection. The bolt foundation can save costs under the premise of bearing high transmission line voltage and large tower load .

In order to achieve the above purpose, the umbrella-shaped rock bolt foundation for power transmission line engineering designed by the utility model includes a cylindrical upper bearing platform and a foundation bearing platform, and the axis lines of the upper bearing platform and the foundation bearing platform overlap and pass through Anchor bolt connection, with the center O of the bottom surface of the foundation cap as the center and the radius R as the uniform vertical anchor hole that does not penetrate, and the lower side of the foundation cap is inclined and symmetrically arranged along the axis line of the foundation cap. There are non-penetrating inclined anchor holes with the same number of vertical anchor holes, the vertical anchor holes and inclined anchor holes are arranged alternately, the vertical anchor holes are fixed with vertical anchor rods by adhesive, and the inclined anchor holes are fixed with inclined anchor rods by adhesive. The included angle between the inclined anchor rod and the axis line of the foundation cap is 15° to 25°. The distance between the inclined anchor hole and the center O of the bottom surface on the foundation cap is r, and r<R is satisfied.

Still further, the distance between any inclined anchor hole and its adjacent vertical anchor hole is equal.

Furthermore, the anchor bolts are uniformly arranged along a circle centered on the axis line of the upper bearing platform; there are eight anchor bolts.

Furthermore, there are twelve vertical anchor holes; correspondingly, there are also twelve inclined anchor holes.

Furthermore, the length of the vertical anchor rod is 3-7 meters; the length of the inclined anchor rod is 3-9 m.

The advantages of the utility model are mainly reflected in the following aspects:

First, the use of inclined bolts can withstand high transmission line voltage and large tower loads, and can effectively control the deformation of the foundation cap and the displacement of the rock mass;

Second, the use of an umbrella-shaped rock bolt foundation can effectively improve the force distribution of the existing rock group bolt foundation, reduce the number of foundation bolts, reduce the size of the foundation cap, and thereby reduce the consumption of foundation resources;

Third, the construction is feasible, safe and reliable, and has the value of use and promotion.

Description of drawings

Fig. 1 is the main view structure schematic diagram of the utility model;

Fig. 2 is a top view structural schematic diagram of Fig. 1;

Fig. 3 is a schematic view of the bottom structure of Fig. 1;

Figure 4 is a schematic structural view of the foundation platform.

In the figure: upper cap 1; foundation cap 2 (among them: vertical anchor hole 2a; inclined anchor hole 2b); anchor bolt 3; vertical anchor 4a; inclined anchor 4b.

detailed description

The utility model will be further described in detail below in conjunction with the accompanying drawings and specific examples, but the examples should not be construed as limiting the utility model.

As shown in the figure, the umbrella-shaped rock bolt foundation for transmission line engineering includes a cylindrical upper cap 1 and a foundation cap 2, and the axis lines of the upper cap 1 and the foundation cap 2 overlap and pass through the foundation The bolts 3 are connected, with the center O of the bottom surface of the foundation cap 2 as the center and the radius R as the uniform vertical anchor hole 2a that does not penetrate, and the lower side of the foundation cap 2 is inclined symmetrically and evenly along the axis of the foundation cap 2 There are non-penetrating inclined anchor holes 2b equal in number to the vertical anchor holes 2a, the vertical anchor holes 2a and inclined anchor holes 2b are arranged alternately, the vertical anchor holes 2a are fixed with vertical anchor rods 4a by adhesive, and the inclined anchor holes 2b pass through The adhesive is fixed with the inclined anchor rod 4b.

The included angle between the inclined anchor rod 4b and the axis line of the foundation cap 2 is 15°-25°.

The distance between the inclined anchor hole 2b and the center O of the bottom surface of the foundation platform 2 is r, and r<R is satisfied.

The distance between any inclined anchor hole 2b and its adjacent vertical anchor hole 2a is equal.

The anchor bolts 3 are evenly arranged along a circle with the axis line of the upper bearing platform 1 as the center; there are eight anchor bolts 3 .

Twelve vertical anchor holes 2a are provided; correspondingly, twelve inclined anchor holes 2b are also provided.

The length of the vertical anchor rod 4a is 3-7 meters; the length of the inclined anchor rod 4b is 3-9 m.

The content not described in detail in this specification belongs to the prior art known to those skilled in the art.

Claims (6)

1. null1. for the umbellate form Rock Bolt Foundation of work transmission line，It is characterized in that: it includes top cushion cap (1) and the foundation platform (2) of column type，Described top cushion cap (1) and foundation platform (2) axial line weight merga pass foundation bolt (3) connect，With the center of circle O of foundation platform (2) bottom surface as the center of circle、With R for radius be evenly arranged with not through vertical anchor hole (2a)，The downside of foundation platform (2) tilt along the axial line of foundation platform (2) be provided with symmetrically and evenly equal with vertical anchor hole (2a) quantity not through inclination anchor hole (2b)，Described vertical anchor hole (2a) and described inclination anchor hole (2b) interlaced arrangement，Described vertical anchor hole (2a) is fixed with normal bolting (4a) by binding agent，Described inclination anchor hole (2b) is fixed with inclination anchor pole (4b) by binding agent，Described inclination anchor pole (4b) is 15 °-25 ° with the angle of the axial line of described foundation platform (2)，Described inclination anchor hole (2b) is r with the distance of the center of circle, the bottom surface O on foundation platform (2)，And meet r ＜ R.
2. Umbellate form Rock Bolt Foundation for work transmission line the most according to claim 1, it is characterised in that: any one of inclination anchor hole (2b) and the distance of vertical anchor hole (2a) being adjacent are the most equal.
3. Umbellate form Rock Bolt Foundation for work transmission line the most according to claim 2, it is characterised in that: described foundation bolt (3) is that the center of circle is arranged along an even circumferential with the axial line of top cushion cap (1)；Described foundation bolt (3) is provided with eight.
4. 4. according to the umbellate form Rock Bolt Foundation for work transmission line described in claim 1 or 2 or 3, it is characterised in that: described vertical anchor hole (2a) is provided with 12；Correspondingly, described inclination anchor hole (2b) is also equipped with 12.
5. Umbellate form Rock Bolt Foundation for work transmission line the most according to claim 4, it is characterised in that: a length of 3-7 rice of described normal bolting (4a)；The a length of 3-9m of described inclination anchor pole (4b).
6. 6. according to the umbellate form Rock Bolt Foundation for work transmission line described in claim 1 or 2 or 3, it is characterised in that: a length of 3-7 rice of described normal bolting (4a)；The a length of 3-9m of described inclination anchor pole (4b).