CN214245806U

CN214245806U - Novel combined foundation of mountain area line utilization high outcrop old foundation

Info

Publication number: CN214245806U
Application number: CN202023064245.0U
Authority: CN
Inventors: 但汉波; 杨逸敏; 郭勇; 陈成; 包玉南; 黄永林; 黄静文; 权凯; 孔祥盼
Original assignee: China Energy Engineering Group Zhejiang Eleteric Power Design Institute Co ltd
Current assignee: China Energy Engineering Group Zhejiang Eleteric Power Design Institute Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-09-21
Anticipated expiration: 2030-12-18

Abstract

The utility model discloses a novel combined foundation of a mountain area line utilization high-outcrop old foundation, which mainly comprises an old foundation and a new foundation connected with the old foundation through a connecting beam, wherein the connecting beam is arranged along the ground gradient to reduce the influence on the ground environment of a tower footing, and internal force calculation and reinforcement are carried out according to an elastic ground foundation beam; the connecting beam mainly comprises a connecting beam main body formed by pouring concrete, and a connecting beam main rib and a connecting beam stirrup which are arranged in the connecting beam main body, wherein the newly-added foundation mainly comprises a newly-added foundation expansion bottom part formed by pouring concrete, a newly-added foundation main column, and a newly-added foundation main rib and a newly-added foundation stirrup which are arranged in the newly-added foundation expansion bottom part and the newly-added foundation main column; one end of the main rib of the connecting beam is inserted into and welded and anchored in the old foundation, the other end of the main rib of the connecting beam is inserted into and welded and anchored on the main rib of the newly added foundation, and the main body of the connecting beam and the main column of the newly added foundation are formed through one-time concrete pouring.

Description

Novel combined foundation of mountain area line utilization high outcrop old foundation

Technical Field

The utility model relates to a transmission line field, concretely relates to mountain area circuit utilizes novel joint basis of high outcrop old foundation.

Background

Under the realistic conditions of shortage of land resources and improvement of environmental protection requirements, the power transmission line may have a three-span section spanning railways, highways above one level and important power transmission lines, a power transmission tower needs to be reinforced in steep hills and mountain areas, and because a side slope is steep, the tower position is unique, and the old tower position is not easy to change. If the old tower moves towards the direction of going downhill, the call height of the tower is greatly increased; if the old tower is reinforced, due to the high outcrop of the old foundation, the horizontal load transmitted to the foundation is obvious, and the high outcrop old foundation needs to be reinforced.

Therefore, the three-span old tower with high and steep slope can fully utilize the topographic features, retain the old foundation with high outcrop and reach the aim of economy and environmental protection. Utilize the novel joint basis of high outcrop old basis, constitute jointly by old basis and the new increase basis in the tower position scope, and connect through linking the roof beam between the two and form wholly, through the load transmission who links the roof beam, partial horizontal load can effectively be shared to newly-increased basis to keep old basis, save the concrete volume on basis, it is economical reasonable.

Disclosure of Invention

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a horizontal load that can effectively reduce old basis and bear, can show the economic nature that improves transmission line shaft tower basis, improve the stable qualitative mountain area circuit of the whole water-resistant of basis simultaneously and utilize the high novel joint basis that exposes old basis.

The utility model aims at solving the technical scheme that a novel combined foundation of a mountain area line utilizing a high-outcrop old foundation mainly comprises the old foundation and a new foundation connected with the old foundation through a connecting beam, wherein the connecting beam is arranged along the ground gradient to reduce the influence on the ground environment of a tower foundation, and internal force calculation and reinforcement are carried out according to an elastic ground foundation beam; the connecting beam mainly comprises a connecting beam main body formed by pouring concrete, and a connecting beam main rib and a connecting beam stirrup which are arranged in the connecting beam main body, wherein the newly-added foundation mainly comprises a newly-added foundation expansion bottom part formed by pouring concrete, a newly-added foundation main column, and a newly-added foundation main rib and a newly-added foundation stirrup which are arranged in the newly-added foundation expansion bottom part and the newly-added foundation main column; one end of the main rib of the connecting beam is inserted into and welded and anchored in the old foundation, the other end of the main rib of the connecting beam is inserted into and welded and anchored on the main rib of the newly added foundation, and the main body of the connecting beam and the main column of the newly added foundation are formed through one-time concrete pouring.

Further, the old foundation mainly comprises an old foundation main column formed by pouring concrete, and an old foundation main rib and an old foundation stirrup which are arranged in the old foundation main column, wherein the old foundation main column is perforated corresponding to the connecting part of the connecting beam so as to ensure that the connecting beam main rib is inserted into the old foundation main rib and welded and anchored on the old foundation main rib.

Furthermore, the main body of the coupling beam is arranged along the slope of the hillside and is shallowly buried in the ground surface, so that the supporting function of the foundation soil body is fully utilized, and the bending resistance of the coupling beam is improved.

Further, the newly-added foundation bottom expanding part, the newly-added foundation main column and the connecting beam main body of the connecting beam are formed by pouring C40 concrete.

The utility model has the advantages of: firstly, the newly-added foundation bears the downward pulling force transmitted by the connecting beam and bears the upward pulling force of part of the old foundation, so that the pulling resistance and the water resistance stability of the old foundation are effectively ensured, and the old foundation is effectively reinforced. Secondly, owing to utilized high outcrop old foundation, the old foundation can undertake whole vertical pushing down force and most upward pulling force, has effectively reduced volume of digging and concrete volume, and is economical and reasonable, and connection structure's wholeness is strong, construction simple operation, efficient.

Drawings

Fig. 1 is an elevation view of the novel joint foundation of the present invention;

FIG. 2 is a plan view of the novel joint foundation of the present invention;

fig. 3 is the basic reinforcement diagram of the novel combined foundation of the utility model.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "lateral", "vertical", and the like are the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1-3, a mountain area circuit utilize high exposure old basis's novel combination basis, mainly include old basis 2 and through linking roof beam 3 with the newly-increased basis 1 that old basis 2 is connected, old basis 2 is for satisfying the iron tower range and the slope requirement high exposure digging hole basis, undertakes whole vertical downforce and most pull up power, to pulling up the load on horizontal load and all the other of slope side down towards, owing to link the load transmission effect of roof beam between the novel combination basis, the part changes to undertake by the newly-increased basis of slope side to can effectively guarantee old basis 2's intensity and stability. The newly-added foundation 1 mainly bears the downward drag force transmitted by the connecting beam 3, and meanwhile, piles can be distributed at a proper position nearby the side of the hillside on the tower position according to the resultant force direction of the horizontal load of the tower, so that the outcrop height and the pile length of the foundation are effectively controlled. The newly-added foundation 1 can still adopt an excavation construction mode, so that the damage of the peripheral environment caused by large excavation can be avoided, and the bearing performance of the undisturbed soil and rock can be fully exerted. One end of the connecting beam 3 is anchored into the old foundation 2 and meets the requirement of effective anchoring length, and the other end is anchored into the newly added foundation 1 to ensure the effectiveness of load transmission; meanwhile, the connecting beam 3 can be basically arranged along the slope of the hillside and is shallowly buried in the ground surface, the supporting effect of the foundation soil body is fully utilized, the bending resistance of the connecting beam 3 is improved, the section size and the reinforcement amount of the connecting beam 3 are reduced, and the influence of the connecting beam 3 on the tower environment is also reduced.

The coupling beam 3 mainly comprises a coupling beam main body 31 formed by pouring concrete, and a coupling beam main rib 32 and a coupling beam stirrup 33 which are arranged in the coupling beam main body 31, wherein the coupling beam main rib 32 and the coupling beam stirrup 33 are calculated and determined according to the horizontal load which can be borne by the newly-added foundation, the stress concentration phenomenon exists at the joint of the two ends of the coupling beam 3 and the newly-added foundation 1 and the old foundation 2, and reinforcing measures such as reinforcing bar arrangement and reinforcing bar anchoring depth extension can be adopted. The concrete of the coupling beam 3 can be C40 concrete, and is poured and tamped simultaneously with the holes punched in the new foundation 1 and the old foundation 2. The newly added foundation 1 mainly comprises a newly added foundation bottom-enlarged portion 11 formed by pouring concrete, a newly added foundation main column 12, and newly added foundation main ribs 13 and newly added foundation stirrups 14 which are arranged in the newly added foundation bottom-enlarged portion 11 and the newly added foundation main column 12; the newly added foundation stirrups 14 and the newly added foundation main reinforcements 13 are determined by calculation according to the horizontal load of the old foundation borne by the newly added foundation 1 and can bear the overall pulling force of a part of the old foundation 2, the newly added foundation main columns 12 and the newly added foundation bottom expanding portion 11 can be poured and tamped by C40 concrete, and the size is determined by calculation according to the geological conditions in the field, the rock stratum distribution and the like. One end of the main connecting beam rib 32 is inserted into the old foundation 2 and welded and anchored, the other end of the main connecting beam rib 32 is inserted into the new foundation main rib 13 of the new foundation 1 and welded and anchored, and the main connecting beam body 31 of the connecting beam 3 and the new foundation main column 12 of the new foundation 1 are formed through one-step concrete pouring.

Referring to fig. 3, the old foundation 2 mainly includes an old foundation main column 21 formed by pouring concrete, and an old foundation main reinforcement 22 and an old foundation stirrup 23 arranged in the old foundation main column 21, the old foundation stirrup 23 and the old foundation main reinforcement 22 are configured according to original reinforcements without changing, the load requirement of the old tower transmitted to the foundation is met, all vertical downward pressure and most upward pulling force are borne, and the old foundation main column 21 is perforated corresponding to the connecting part of the connecting beam 3 to ensure that the connecting beam main reinforcement is inserted into and welded and anchored on the old foundation main reinforcement. The main body of the coupling beam is arranged along the slope of the hillside and is shallowly buried in the earth surface, so that the supporting function of the foundation soil body is fully utilized, and the bending resistance of the coupling beam is improved.

The newly added foundation 1 can effectively share horizontal load, so that the horizontal bearing capacity requirement of the high outcrop old foundation 2 is met. After a newly-added foundation with relatively small size is additionally arranged on the side of the upward slope, the overall bending rigidity of the novel combined foundation is obviously increased, and the horizontal bearing capacity of the foundation at the high and steep slope can be effectively improved. Through calculation and comparison, under the same geological and topographic conditions, the novel combined foundation utilizing the high-outcrop old foundation can obviously improve the horizontal bearing capacity resistance of the old foundation, improve the whole bending rigidity, obviously reduce the manufacturing cost and have obvious economic benefit.

The specific embodiments described herein are merely illustrative of the principles of the present invention and its efficacy, and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical idea of the present invention shall be covered by the claims of the present invention.

Claims

1. The utility model provides a mountain area circuit utilizes high outstanding new joint basis of old basis which characterized in that: the tower foundation mainly comprises an old foundation and a newly-added foundation connected with the old foundation through connecting beams, wherein the connecting beams are arranged along the gradient of the ground so as to reduce the influence on the ground environment of the tower foundation, and internal force calculation and reinforcement are carried out according to the elastic ground foundation beams; the connecting beam mainly comprises a connecting beam main body formed by pouring concrete, and a connecting beam main rib and a connecting beam stirrup which are arranged in the connecting beam main body, wherein the newly-added foundation mainly comprises a newly-added foundation expansion bottom part formed by pouring concrete, a newly-added foundation main column, and a newly-added foundation main rib and a newly-added foundation stirrup which are arranged in the newly-added foundation expansion bottom part and the newly-added foundation main column; one end of the main rib of the connecting beam is inserted into and welded and anchored in the old foundation, the other end of the main rib of the connecting beam is inserted into and welded and anchored on the main rib of the newly added foundation, and the main body of the connecting beam and the main column of the newly added foundation are formed through one-time concrete pouring.

2. The novel united foundation of mountain area line with high outcrop old foundation as claimed in claim 1, wherein: the old foundation mainly comprises an old foundation main column formed by pouring concrete, and an old foundation main rib and an old foundation stirrup which are arranged in the old foundation main column, wherein the old foundation main column is perforated corresponding to the connecting part of the connecting beam so as to ensure that the connecting beam main rib is inserted into and welded and anchored on the old foundation main rib.

3. The new type of united foundation of mountain line with high outcrop old foundation as claimed in claim 1 or 2, wherein: the main body of the coupling beam is arranged along the slope of the hillside and is shallowly buried in the earth surface, so that the supporting function of the foundation soil body is fully utilized, and the bending resistance of the coupling beam is improved.

4. The new type of united foundation of mountain line with high outcrop old foundation as claimed in claim 1 or 2, wherein: the bottom of the newly added foundation extension, the main column of the newly added foundation and the connecting beam main body of the connecting beam are all formed by pouring C40 concrete.