CN214574100U - Undercut type semi-digging type foundation of power transmission line iron tower - Google Patents
Undercut type semi-digging type foundation of power transmission line iron tower Download PDFInfo
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- CN214574100U CN214574100U CN202023297399.4U CN202023297399U CN214574100U CN 214574100 U CN214574100 U CN 214574100U CN 202023297399 U CN202023297399 U CN 202023297399U CN 214574100 U CN214574100 U CN 214574100U
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Abstract
The utility model provides an undercut type half digging type foundation of a power transmission line iron tower, which comprises an underground iron tower foundation, wherein the iron tower foundation comprises a base and a foundation column above the base, the base comprises an upper base and a lower base, and the edge of the lower base is inclined towards two sides; the utility model sets the edge of the lower layer base to a certain gradient, so that the stress area of the lower layer base is enlarged, the bearing capacity of the undisturbed soil is utilized, the foundation size is effectively reduced, the excavation area is reduced, and the influence on the ecological environment is less; the foundation depth is shallower, and construction safety is good, and the advantage of full play novel basis more is favorable to energetically promoting the application of drawing and digging type basis.
Description
Technical Field
The utility model belongs to the basis field of transmission line iron tower, concretely relates to undercut formula of transmission line iron tower is partly drawn and is dug type basis.
Background
In the line, an excavation type foundation is adopted, so that on one hand, the excavated earth volume of the foundation pit is small, the influence on the environment is small, and basically no redundant earth needs to be treated; on the other hand, the mechanical property of undisturbed soil can be fully utilized, concrete is reduced, no stable side slope is required to be reserved, the base plane can be greatly reduced, and the construction cost of foundation engineering is effectively reduced. In the prior art, a pit is dug under the ground 1, the foundation is divided into pits, and then foundation pit excavation, rib binding and formwork supporting, concrete pouring into a formwork, formwork stripping and backfilling are carried out according to requirements and tamping is carried out to obtain the original iron tower foundation 2. However, the buried depth of the excavation type foundation is generally more than 6 meters, the opening of the excavation hole is small, in order to ensure the safety of constructors, a protective wall needs to be manufactured while construction is carried out, the construction progress is delayed, and the requirement on the self-supporting property of a soil layer is high.
Disclosure of Invention
In order to solve the problem, the utility model provides an undercut formula of transmission line iron tower is partly drawn and is dug type basis.
The purpose of the utility model is realized with the following mode:
the utility model provides an undercut formula of transmission line iron tower is partly drawn and is dug type basis, is including burying underground iron tower basis, iron tower basis include the foundation of base and base top, the base includes upper base and lower floor's base, the slope is put to both sides in the edge of lower floor's base.
The slope of the slope is 30-60 degrees.
The upper layer base is step-shaped.
The upper-layer base is of an upward inclined slope type.
The foundation column is a straight column type foundation.
The foundation column is an inclined column type foundation.
The iron tower foundation is a concrete column, and a reinforcement cage is pre-embedded in the concrete column.
Compared with the prior art, the utility model has the advantages that the edge of the lower layer base is set to a certain gradient, so that the stress area of the lower layer base is enlarged, the bearing capacity of original soil is utilized, the foundation size is effectively reduced, the excavation area is reduced, and the influence on the ecological environment is small; the foundation depth is shallower, and construction safety is good, and the advantage of full play novel basis more is favorable to energetically promoting the application of drawing and digging type basis.
Drawings
Fig. 1 is a schematic diagram of an original iron tower infrastructure in the background art.
Fig. 2 is a schematic top view of fig. 1.
Fig. 3 is a schematic structural diagram of the present invention.
Fig. 4 is a schematic top view of the present invention.
Fig. 5 is a schematic diagram of a square foundation pit structure.
Fig. 6 is a schematic diagram of the excavated foundation pit structure.
Wherein 1 is the ground; 2, an original iron tower foundation; 3, a foundation pit; 4, an iron tower foundation; 5 is a base pillar; 6 is a lower base; and 7 is an upper base.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are only a part of the embodiments of the present invention, not all embodiments. Based on the utility model discloses the embodiment of applying for, to the technical personnel of this field, a plurality of changes and improvements etc. that make, all other embodiments that obtain all belong to the scope of the utility model protection.
As shown in fig. 3-6, the utility model relates to an undercut formula of transmission line iron tower is partly drawn and is dug type basis, including burying iron tower basis 4 under ground 1, iron tower basis 4 includes pillar 5 on upper portion and base 6 of lower part. The lower base 6 includes an upper base 7 and a lower base 6.
The edge 6 of the lower-layer base is cut and dug outwards, namely the edge of the lower-layer base 6 is sloped towards two sides (towards original state soil), the slope of the slope is 30-60 degrees, the stress area of the bottom of the iron tower foundation 4 is increased, and the bearing capacity of the original state soil is fully utilized.
Preferably, the upper base 7 is stepped or inclined upward.
Preferably, the upper foundation 5 may be a concrete foundation of a straight column type; the concrete foundation can also be an inclined column type concrete foundation, the inclined angle is 0-30 degrees, and the gradient of the inclined foundation column is the same as that of the main material of the leg of the iron tower.
The iron tower foundation 4 is a concrete column, and a steel reinforcement cage is pre-buried in the concrete column.
The working process of the utility model is as follows (for convenience of explanation, the following base is the ladder-shaped base with the upper base 7, and the foundation column 5 is vertical, and is specifically explained):
firstly, a square foundation pit 3 is excavated according to the foundation pit dividing positioning position and the set size, and excavated silt or soil is far away from a pithead, so that the excavated silt or soil is prevented from falling back into the foundation pit 3 and cannot be over-excavated, and undisturbed soil is ensured not to be disturbed. And (3) downward cutting and digging construction outwards at the edge of the bottom of the foundation pit 3, namely putting a slope and digging, wherein the slope is 30-60 degrees, the pit bottom is smooth, and the foundation pit is finished.
And binding steel bars to the bottom of the foundation pit 3 to form a steel reinforcement cage, wherein the steel reinforcement cage cannot be in contact with a soil layer on the side of the foundation pit, erecting a pouring template on an upper steel reinforcement cage (namely the steel reinforcement cage on the lower part of the foundation pit 3 which is dug downwards), digging more parts, namely backfilling the foundation pit outside the pouring template with soil or pouring concrete, pouring concrete into the pouring template through the head of the upper end of the pouring template when the strength of the tamped or poured concrete meets the requirement, and obtaining the iron tower foundation column 5 pre-embedded with the steel reinforcement cage after the concrete is solidified and reaches a certain strength.
And reasonably selecting a slope changing point according to the gradient or the predetermined gradient of the main material of the tower leg and the magnitude of the horizontal force. In order to facilitate pore forming and smoothly place the reinforcement cage into the hole, the construction should be excavated manually or mechanically according to the vertical undisturbed soil foundation during construction, and then the parts above the variable slope point are supplemented according to the slope requirement, and the excavated parts can be backfilled with soil after formwork supporting and can also be directly poured with concrete after the reinforcement cage is well excavated.
The utility model adopting the technical scheme can realize one-time excavation, digging and forming and one-time pouring, is simple and efficient, and accelerates the construction progress; compared with the excavation foundation, the bearing capacity of undisturbed soil is fully utilized, the size of the foundation is effectively reduced, the excavation area and the volume of earth and stone are reduced, and the influence on the ecological environment is small; compared with the traditional excavation type foundation, the foundation is shallower in depth, good in construction safety and wider in application range to soil layers, and not only can be used for excavating and excavating formed soil layers, but also can be used for strongly weathered and moderately weathered rocks. To sum up, the utility model discloses can the novel basic advantage of full play, more be favorable to energetically impel to draw the application of digging type of basis, have very considerable economy and social.
The above description of the present invention is only the preferred embodiments shown in the attached drawings, but not intended to limit the scope of the present invention, and it should be noted that, for those skilled in the art, those skilled in the art should not pay any modification, equivalent replacement, improvement, etc. made by creative work without departing from the overall concept of the present invention, and these should be all included in the scope of the present invention.
Claims (7)
1. The utility model provides an undercut formula of transmission line iron tower is partly drawn and is dug type basis, is including burying underground iron tower basis, iron tower basis include the foundation column of base and base top, its characterized in that: the base includes upper base and lower floor's base, and the edge of lower floor's base is to both sides slope.
2. The undercut type semi-excavated foundation of the power transmission line iron tower according to claim 1, characterized in that: the slope of the slope is 30-60 degrees.
3. The undercut type semi-excavated foundation of the power transmission line tower according to claim 1 or 2, characterized in that: the upper layer base is step-shaped.
4. The undercut type semi-excavated foundation of the power transmission line tower according to claim 1 or 2, characterized in that: the upper-layer base is of an upward inclined slope type.
5. The undercut type semi-excavated foundation of the power transmission line iron tower according to claim 1, characterized in that: the foundation column is a straight column type foundation.
6. The undercut type semi-excavated foundation of the power transmission line iron tower according to claim 1, characterized in that: the foundation column is an inclined column type foundation.
7. The undercut type semi-excavated foundation of the power transmission line iron tower according to claim 1, characterized in that: the iron tower foundation is a concrete column, and a reinforcement cage is pre-embedded in the concrete column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023297399.4U CN214574100U (en) | 2020-12-31 | 2020-12-31 | Undercut type semi-digging type foundation of power transmission line iron tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023297399.4U CN214574100U (en) | 2020-12-31 | 2020-12-31 | Undercut type semi-digging type foundation of power transmission line iron tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214574100U true CN214574100U (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023297399.4U Active CN214574100U (en) | 2020-12-31 | 2020-12-31 | Undercut type semi-digging type foundation of power transmission line iron tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214574100U (en) |
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2020
- 2020-12-31 CN CN202023297399.4U patent/CN214574100U/en active Active
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