CN107558487A - A kind of goaf transmission line foundation bracing means and reinforcement means - Google Patents

Abstract

The invention discloses a kind of goaf transmission line foundation bracing means and reinforcement means, belong to foundation protection field；Technical problem to be solved, which there is provided, can combine conventional foundation the strengthening of foundation device for being integrally formed big plate basis in a kind of goaf transmission line of electricity；Solve technical scheme that the technical problem uses for：A kind of goaf transmission line foundation bracing means, includes the straight column type basis of four rectangular distributions, and basic stand column surrounding is provided with fixed steel, is provided with support between basis, support includes reinforcing bar and stirrup；Reinforcement means is that fixed steel is set on original base, and the support of reinforcing bar and stirrup composition is set between original base, and by concreting, multiple bases are fixedly connected as into the big plate basis of an entirety；It the composite can be widely applied to strengthening of foundation.

Description

A reinforcement device and reinforcement method for transmission line foundation in goaf

technical field

The invention relates to a goaf transmission line foundation reinforcement device and a reinforcement method, which belong to the technical field of transmission line foundation protection.

Background technique

The subsidence caused by goaf subsidence and the movement of the surface basin will cause uneven settlement of the foundation of the transmission tower. The non-load stress generated during the uneven settlement of the foundation will most likely lead to accidents such as damage, fracture, and deformation of the tower components. Leading to tower collapse and disconnection, it poses a serious threat to the safe operation of transmission lines.

In order to ensure that the transmission tower can still operate safely and stably when the foundation is unevenly settled, the current common method is to use a large slab foundation and lengthen the anchor bolts.

In actual work, most of the transmission lines are designed to be put into operation early. The design of the large slab foundation was not adopted in the design of that year, but the ordinary foundation was adopted. The ordinary foundation has poor resistance to subsidence and uneven settlement. It is necessary to adjust the foundation and ensure safe operation. very difficult.

Contents of the invention

The invention overcomes the deficiencies in the prior art and provides a foundation reinforcement device for combining ordinary foundations into an integral large slab foundation in a power transmission line in a goaf.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a goaf power transmission line foundation reinforcement device, including four straight column foundations distributed in a rectangular shape, anchor bolts are arranged on the upper surface of the foundation, and foundation columns are arranged around There are fixed steel, and brackets are set between the foundations.

The two ends of the fixed steel are provided with a first connecting hole and a second connecting hole, the first connecting hole is set on the inner side of the fixed steel, the second connecting hole is set on the outer side of the fixed steel, and the fixed steel is set on the foundation column The top is arranged in a well shape, studs are arranged between the opposite first connecting holes, and the second connecting holes are connected with the bracket.

The studs are double-ended studs, and the studs are matched with nuts, and the nuts are thickened nuts.

The bracket includes steel bars and stirrups.

The fixing steel can be channel steel or other shaped steel.

A foundation reinforcement method for a goaf, comprising the steps of:

1. Take safety reinforcement measures for the transmission towers that have undergone uneven settlement in the goaf;

2. Excavate 1 meter downward along the original foundation, and install fixed steel around the foundation column;

3. According to the design load and additional load requirements, set a support composed of steel bars and stirrups through the second connection hole on the outside of the fixed steel to connect multiple foundations.

4. Concrete is poured, and the connected foundations are combined into an overall large slab foundation. After the concrete strength requirements are met, the temporary safety reinforcement measures are removed.

Compared with the prior art, the present invention has the following beneficial effects: connecting beams are arranged between ordinary straight-column foundations, and the straight-column foundations are connected into a whole foundation through connecting beams, which increases the stability of the foundation and can effectively avoid Severe accidents such as tower collapse and disconnection effectively ensure the safe operation of the line, improve the reliability of power supply, reduce the waste of manpower and material resources caused by adjusting the foundation of the tower, and are safe and environmentally friendly, green and low-carbon.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of the present invention.

FIG. 2 is a side view of FIG. 1 .

In the figure, 1 is the foundation, 2 is the anchor bolt, 3 is the fixing steel, 4 is the reinforcement frame, 5 is the stud, 6 is the nut, 31 is the first connection hole, and 32 is the second connection hole.

detailed description

As shown in Fig. 1 and Fig. 2, a kind of goaf transmission line foundation strengthening device of the present invention includes four straight column foundations 1 distributed in a rectangle, the upper surface of the foundation 1 is provided with anchor bolts 2, and the foundation 1 is surrounded by uprights. A fixed steel 3 is provided, and a bracket 4 is provided between the foundations 1; a first connection hole 31 and a second connection hole 32 are provided at both ends of the fixed steel 3, and the first connection hole 31 is provided inside the fixed steel 3, The second connecting hole 32 is arranged on the outside of the fixed steel 3, and the fixed steel 3 is arranged in a square shape on the foundation 1 column, and studs 5 are arranged between the first connecting holes 31 opposite, and the second connecting hole 32 is connected with the bracket 4; the stud 5 is a double-ended stud, and the stud 5 is provided with a nut 6, and the nut 6 is a thickened nut; the bracket 4 includes a steel bar and a stirrup; The fixed steel 3 can be a channel steel or other shaped steel.

When the present invention is in use, first design the reinforcement and concrete strength grades of the steel skeleton according to the design load and additional load of the foundation of the goaf, and after taking safety reinforcement measures for the iron tower foundation that needs to be strengthened, the reinforcement along the four sides of the foundation 1 main column Excavate the groove for installing the bracket 4, install the fixed steel 3 around the main column of the foundation 1 through bolts 5 and nuts 6, then bind concrete reinforcement at the second connection hole 32 of the fixed steel 3, and then pour concrete, Connect multiple foundations 1 into an overall large slab foundation. When the concrete strength reaches 95% and above, the grooves are backfilled. When the concrete strength reaches 100%, the temporary safety reinforcement measures are removed to restore the normal operation of the line.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Within the scope of knowledge of those of ordinary skill in the art, various modifications can be made without departing from the gist of the present invention. kind of change.

Claims (6)

1. a kind of goaf transmission line foundation bracing means, include the straight column type basis of four rectangular distributions（1）, its feature It is：Basis（1）Upper surface is provided with foundation bolt（2）, basis（1）Column surrounding is provided with fixed steel（3）, basis（1）It Between be provided with support（4）.

A kind of 2. goaf transmission line foundation bracing means according to claim 1, it is characterised in that：The fixed steel （3）It is provided at both ends with the first connecting hole（31）With the second connecting hole（32）, described the first connecting hole（31）Fixed steel is set（3） Inner side, the second described connecting hole（32）It is arranged on fixed steel（3）Outside, the fixed steel（3）On basis（1）It is in well on column Font arranges, the first relative connecting hole（31）Between be provided with stud（5）, the second connecting hole（32）With support（4）Connection.

A kind of 3. goaf transmission line foundation bracing means according to claim 2, it is characterised in that：Described stud （5）For studs, the stud（5）It is supporting to be provided with nut（6）, the nut（6）To thicken nut.

A kind of 4. goaf transmission line foundation bracing means according to claim 1, it is characterised in that：The support （4）Including reinforcing bar and stirrup.

A kind of 5. goaf transmission line foundation bracing means according to claim 1, it is characterised in that：Described fixation Steel（3）Can be channel-section steel, or other shaped steel.

A kind of 6. goaf strengthening of foundation method, it is characterised in that comprise the following steps：

First, the electric power pylon that differential settlement goaf has occurred takes safe reinforcement measure；

2nd, along original base（1）Surrounding excavates downwards 1 meter, on basis（1）Column surrounding fixed steel is set（3）；

3rd, according to design load and additional load requirement, fixed steel is passed through（3）Second connecting hole in outside（32）Set reinforcing bar and The support of stirrup composition, by multiple bases（1）Connect；

4th, casting concrete, the basis that will be connected（1）Combine and be integrally formed big plate basis, reach concrete strength requirement Afterwards, interim safe reinforcement measure is removed.