CN214784135U

CN214784135U - Anchor rod-prefabricated cushion block type foundation

Info

Publication number: CN214784135U
Application number: CN202120242327.5U
Authority: CN
Inventors: 孔繁力; 李阳洋; 冯凯; 王春超; 张云健
Original assignee: Northeast Electric Power Design Institute of China Power Engineering Consulting Group
Current assignee: Northeast Electric Power Design Institute of China Power Engineering Consulting Group
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-11-19
Anticipated expiration: 2031-01-28

Abstract

The utility model provides an anchor rod-prefabricated cushion block formula basis, including changing and filling the gravel layer, setting up and changing the precast concrete cushion that fills on the gravel layer, alternate at the precast concrete cushion and change the anchor rod that fills the gravel layer center, anchor rod, precast concrete cushion and change and fill the gravel layer and pass through concrete thick liquid and solidify as an organic whole structure, during anchor section ground layer was stretched into to the anchor rod lower part, solidified with ground on every side through the concrete thick liquid and become an organic whole, construction convenience, it is with low costs.

Description

Anchor rod-prefabricated cushion block type foundation

Technical Field

The utility model discloses the technique relates to electric power engineering power transmission iron tower and transformer framework basis technical field especially relates to an stock-prefabricated spacer formula basis.

Background

Power transmission iron tower and transformer framework: the power transmission iron tower is a main supporting structure of a wire of a power transmission line; the transformation framework is a main supporting structure of outdoor wires of a substation, a transformer substation and the like. The axial pressure born by the power transmission iron tower and the power transformation lattice test frame foundation is relatively small, and the axial pressure mainly bears bending moment. Particularly, the tower feet exert pressure on the foundation, and the other tower feet exert tension on the foundation; the transformer herringbone column framework foundation can bear the pressure applied by the herringbone column and the tension applied by the herringbone column, and the foundation mainly adopts two forms of pile foundation or concrete free-standing foundation at present. The pile foundation is difficult to sink in some geological conditions, such as the problem that a precast pile is difficult to sink in a sand field and a cast-in-place pile is necked down; the concrete independent foundation has the problems of large concrete consumption, long construction and maintenance time, difficult construction in winter and the like.

Disclosure of Invention

The utility model aims at providing an anchor rod-prefabricated cushion block type foundation with less concrete consumption; the construction speed is high, which is beneficial to accelerating the construction period; the method is suitable for almost all geological conditions and can be used for construction in winter.

In order to achieve the purpose, the invention provides an anchor rod-prefabricated cushion block type foundation which comprises a sand-filled replacement gravel layer, a prefabricated concrete cushion block arranged on the sand-filled replacement gravel layer and an anchor rod inserted into the centers of the prefabricated concrete cushion block and the sand-filled replacement gravel layer, wherein the anchor rod, the prefabricated concrete cushion block and the sand-filled replacement gravel layer are solidified into an integral structure through concrete slurry, and the lower part of the anchor rod extends into an anchoring section rock-soil layer and is solidified into a whole with surrounding rock-soil through concrete slurry.

Further, the precast concrete cushion block comprises an upper-level precast concrete cushion block and a lower-level precast concrete cushion block, and the upper-level precast concrete cushion block and the lower-level precast concrete cushion block are fixedly embedded together.

Furthermore, angle steel connected with the upper structure is embedded in the upper-level precast concrete cushion block.

Furthermore, foundation bolts connected with the upper steel pipe flange plate are embedded in the upper precast concrete cushion block.

Furthermore, a notch is formed in the upper portion of the lower-stage precast concrete cushion block, and the size of the upper-stage precast concrete cushion block is matched with the notch.

Furthermore, the upper-level precast concrete cushion block and the lower-level precast concrete cushion block are provided with reserved anchor rod mounting holes.

Further, the thickness of the sand-filled stone replacing layer is larger than 1/2 of the length of the long edge of the bottom of the lower-stage precast concrete cushion block.

The utility model discloses stock-prefabricated spacer formula basis bear by prefabricated cushion and send the pressure that transformer tower and framework transmitted, bear the pull-up force by the stock, for the advantage that prior art has:

compared with an independent foundation, the anchor rod-prefabricated cushion block type foundation has the following advantages:

(1) the anchor rod-prefabricated cushion block type foundation cushion block is prefabricated in a factory, does not have the amount of template engineering, and is simple and convenient; the independent foundation has the template engineering quantity, and the site construction quantity is very large and complex.

(2) Because the anchor rod-prefabricated cushion block type foundation is manufactured by a factory, the anchor rod-prefabricated cushion block type foundation can be produced in batches, the cost is reduced, the construction period is saved to the maximum extent, even the anchor rod-prefabricated cushion block type foundation can be stocked in advance by the factory and distributed according to the needs, and the zero period of processing and manufacturing is realized

(3) The anchor rod-prefabricated cushion block type foundation is simple in installation process and can be constructed in winter or under other conditions which are unfavorable to conventional cast-in-place concrete engineering.

Compared with a pile foundation, the anchor rod-prefabricated cushion block type foundation has the following advantages:

(1) the anchor rod-prefabricated cushion block type foundation construction machine is simple, convenient to operate and low in manufacturing cost; pile foundation construction equipment is large, relatively heavy and high in manufacturing cost.

(2) The anchor rod-prefabricated cushion block type foundation is manufactured in a factory, so that the cost is low, the construction period is saved, and the installation and construction are not limited; the pile foundation needs to be constructed on site, and construction is limited under adverse conditions such as winter.

Drawings

FIG. 1 is a longitudinal cross-sectional view of a bolt-pre-cast spacer foundation of the present invention;

FIG. 2 is a schematic view of the upper side of the anchor-prefabricated spacer foundation of the present invention;

wherein: 1-anchor rod; 2-upper-level precast concrete cushion blocks; 3-lower-stage precast concrete cushion blocks; 4-replacing and filling the sandstone layer; 5-anchoring section rock-soil layer.

Detailed Description

In order to better understand the purpose, structure and function of the present invention, the anchor rod-prefabricated pad foundation of the present invention will be described in further detail with reference to the accompanying drawings.

In a specific embodiment, in a certain power transmission line iron tower project, a line passes through an area with lower foundation bearing capacity, an anchor rod-prefabricated cushion block type framework foundation is adopted as an iron tower foundation, four tower feet of each iron tower are respectively provided with one foundation, a longitudinal section view is shown in an attached drawing 1, and an assembly effect view is shown in an attached drawing 2.

The anchor rod-prefabricated cushion block type foundation comprises a sand-filled stone layer 4, a prefabricated concrete cushion block arranged on the sand-filled stone layer, and an anchor rod 1 inserted into the centers of the prefabricated concrete cushion block and the sand-filled stone layer, wherein the anchor rod 1, the prefabricated concrete cushion block and the sand-filled stone layer 4 are solidified into an integral structure through concrete slurry, and the lower part of the anchor rod 1 extends into an anchoring section rock-soil layer 5 and is solidified into a whole with surrounding soil through the concrete slurry.

For the needs of convenient transportation and saving concrete, the precast concrete cushion is followed highly to be divided into second grade precast concrete cushion, including higher level precast concrete cushion 2 and subordinate precast concrete cushion 3, the pre-buried angle steel that links to each other with superstructure of higher level

precast concrete cushion

2, 3 upper portions of subordinate precast concrete cushion make the notch be used for inlaying higher level precast concrete cushion 2, subordinate precast concrete cushion 3 further falls into the three-section again, so that the transportation, the installation, every grade precast concrete cushion all has the stock mounting hole of reservation.

The sand-filled gravel layer 4 is used as a soil-changing cushion layer, and the thickness of the sand-filled gravel layer is larger than 1/2 of the length of the long edge at the bottom of the lower-stage precast concrete cushion 3, so that the bearing capacity of the foundation is greatly improved. The top surfaces of the four foundation sand-filled stone layers 4 of each iron tower need to be leveled, and then the precast concrete cushion blocks are placed step by step.

When the anchor rod-prefabricated cushion block type foundation is implemented, the prestressed anchor rod adopts a structure with a protective pipe and is used as a drill rod and a grouting pipe, slurry is sprayed out from a drill bit through the hollow anchor rod 1, and gaps and drilled holes of the anchoring section rock-soil layer 5, the sand replacement layer 4 and the prefabricated

concrete cushion blocks

2 and 3 around the anchor rod 1 are filled. The anchor rod 1, the surrounding anchoring section rock-soil layer 5, the sand-filled layer 4 and the precast

concrete cushion blocks

2 and 3 are solidified into a whole, and the function of reinforcement is achieved. By adopting the process, drilling, grouting and anchoring can be completed at one time, and the work efficiency is improved by 25%; the grouting is full, and is particularly suitable for stratum construction with serious hole collapse; the prestressed anchor rod consists of seven parts, namely a drill rod with a propeller outlet hole on the side surface, an anchor rod, a drill bit, a positioner, a connecting disc, a steel base plate, an anchorage device and the like; the drill bit is conical and is cast by wear-resistant alloy steel, and a slurry outlet is reserved; the locator, the connector and the anchorage device are all formed by casting alloy steel, the locating disc is arranged in the middle of each anchor rod to ensure that a drilled hole is straight and the anchor rod is stressed in the axial direction, and the backing plate and the anchorage device are used for fixing the end part of the anchor rod and applying prestress.

In a specific embodiment, a steel pipe herringbone column framework is adopted in a certain transformer substation project, the bearing capacity of a foundation is low, and an anchor rod-prefabricated cushion block type framework foundation is adopted as the foundation. The longitudinal section is shown in figure 1, and the assembly effect is shown in figure 2.

Adopt second grade

precast concrete cushion

2, 3 in this embodiment, the rag bolt that 2 pre-buried and upper portion steel pipe flange of higher level precast concrete cushion links to each other, 3 upper portions of lower level precast concrete cushion make the notch be used for inlaying higher level precast concrete cushion 2, every level precast concrete cushion all has the stock mounting hole of reservation.

The rest is the same as the first embodiment.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims

1. The utility model provides an anchor rod-prefabricated cushion block formula basis, its characterized in that, including trade fill gravel layer (4), set up at trade fill gravel layer (4) above precast concrete cushion, alternate at precast concrete cushion and trade anchor rod (1) of filling gravel layer (4) center, anchor rod (1) precast concrete cushion and trade fill gravel layer (4) and solidify as an organic whole structure through concrete thick liquid solidification, during anchor rod (1) lower part stretched into anchor section ground layer (5), solidified into an organic whole through concrete thick liquid and ground on every side.

2. The anchor-prefabricated spacer foundation of claim 1, wherein: the precast concrete cushion block comprises an upper precast concrete cushion block (2) and a lower precast concrete cushion block (3), and the upper precast concrete cushion block (2) and the lower precast concrete cushion block (3) are embedded together.

3. The anchor-prefabricated spacer foundation of claim 2, wherein: the upper-level precast concrete cushion block (2) is embedded with angle steel connected with the upper structure.

4. The anchor-prefabricated spacer foundation of claim 2, wherein: and foundation bolts connected with the upper structure are embedded in the upper-level precast concrete cushion block (2).

5. The anchor-prefabricated spacer foundation of claim 2, wherein: a notch is formed in the upper portion of the lower-stage precast concrete cushion block (3), and the size of the upper-stage precast concrete cushion block (2) is matched with the notch.

6. The anchor-prefabricated spacer foundation of claim 1, wherein: the upper-level precast concrete cushion block (2) and the lower-level precast concrete cushion block (3) are provided with reserved anchor rod mounting holes.

7. The anchor-prefabricated spacer foundation of claim 1, wherein: the thickness of the sand-filled stone layer (4) is larger than 1/2 of the long side length of the bottom long side of the lower-stage precast concrete cushion block (3).