CN112323845A - Open caisson dado digging foundation for power transmission line iron tower in desert area - Google Patents
Open caisson dado digging foundation for power transmission line iron tower in desert area Download PDFInfo
- Publication number
- CN112323845A CN112323845A CN202011248391.0A CN202011248391A CN112323845A CN 112323845 A CN112323845 A CN 112323845A CN 202011248391 A CN202011248391 A CN 202011248391A CN 112323845 A CN112323845 A CN 112323845A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- dado
- outer side
- foundation
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
Abstract
The invention relates to the technical field of desert zone foundations, in particular to a sunk well wall-protecting digging foundation for a power transmission line iron tower in a desert zone. The invention has reasonable and compact structure, can meet the foundation requirements of different specifications by adjusting the number of the third wall protection cylinders, has wide application range, can be detachably installed together, can be convenient for field installation, can also prefabricate the wall protection cylinders firstly, reduce the labor intensity and improve the field operation efficiency, can be convenient for the installation of the later-stage transmission line iron tower by arranging the reinforcement cage, can solve the problems of great waste and low economic benefit caused by poor foundation safety, overlarge foundation redundancy and the like of the transmission line iron tower in desert areas with limited field supporting conditions, nervous water sources and the like, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.
Description
Technical Field
The invention relates to the technical field of desert zone foundations, in particular to a sunk well dado excavation foundation for a power transmission line iron tower in a desert zone.
Background
The landscape of the western desert in China is wide in distribution, and under the large background of the west power transmission and the east power transmission, the power transmission lines need to pass through the desert area. In windage desert areas, the foundation layer has the characteristics of deep distribution thickness, high fluidity, high porosity, no cohesive force, poor overall strength and the like, natural conditions are relatively severe, wind erosion and sand burying phenomena are severe, foundation construction materials of the transmission line tower are deficient, engineering construction and transportation difficulty is high, and the like. Due to poor self-stability characteristic of aeolian sand and difficult field supporting, the traditional large-excavation foundation earthwork has large excavation amount, long construction period, high construction cost, larger occupied area and serious environmental damage.
The excavation type foundation is characterized in that a steel reinforcement framework and concrete of the foundation are directly poured into a soil bed formed by mechanical or manual excavation, and a pulling-resistant soil body formed by natural soil interacts with the self weight of the foundation to keep the pulling-up stability of the foundation. In order to meet the requirements of construction operation of manual excavation and guarantee personal safety in construction, the size of an excavation type foundation is preferably that the diameter of a foundation column is not less than 0.8m, the burial depth and the bottom expanding diameter are not more than 3m, water should not permeate into a foundation pit during pouring, safety and quality guarantee measures must be adopted in construction, the excavation type foundation is widely used in high-voltage transmission line engineering, the construction method is that a required foundation pit is directly excavated and drilled in natural soil by using machinery or manpower, and a steel reinforcement framework and concrete are directly poured into the foundation pit.
The digging type foundation has the advantages of small digging surface and digging amount, no template and backfill process, faster construction progress and the like, can generate remarkable economic, social and environmental benefits, is one of the most environmental-friendly power transmission line iron tower foundation types at present, has reasonable structure, can fully play the characteristics of undisturbed soil, and can bear uplift, downward pressing and horizontal moment under the combined action with surrounding soil layers; the theoretical calculation is in accordance with the actual situation, the foundation type is simple, the using amount of the steel bars and the concrete can be saved, and the excavation amount of the foundation earthwork can be reduced, so that the construction cost is reduced; foundation construction is convenient, mechanical carrying capacity is small, a template and a backfilling process are omitted, and construction progress of a project is accelerated; the method is suitable for line engineering with difficult transportation conditions, and the construction quality of the foundation is ensured; avoiding the large excavation of the foundation pit, not damaging undisturbed soil and basal vegetation, reducing water and soil loss and being beneficial to the stability of the tower footing.
However, the application of the digging type foundation to the power transmission line engineering in the desert area has the following disadvantages: (1) the foundation soil is easy to dig and form, the underground water level is not too high, and the foundation pit is required to be penetrated without water during pouring. The digging type foundation is suitable for tower positions which are convenient to dig and form and have deep underground water burial, such as general cohesive soil, silty clay, mudstone, argillaceous sandstone and the like; (2) the excavated foundation is essentially a manually excavated cast-in-place pile (typically a rigid pile) with greater rigidity. In order to improve the bearing performance of the pile, the bottom of the pile is subjected to bottom expanding, and the diameter of the bottom expanding depends on the diameter of the foundation column and the height of the bottom expanding. The excessive height of the enlarged bottom can cause the abrupt increase of the volume of concrete, the obvious reduction of economic benefit, and the size of the diameter of the enlarged bottom is limited, so that the pressure bearing foundation with larger pressing load and the tower with lower foundation bearing capacity are not suitable for using the digging type foundation; (3) in order to meet the minimum dimension of manual excavation during application, the diameter of a foundation column of the excavation type foundation should not be too small (equal to or larger than 800 mm), and the buried depth should not be too shallow for safety. Limited by the above conditions, if the line with a small load of 110kV or below adopts a digging type foundation, the foundation redundancy is too large, resulting in great waste.
Disclosure of Invention
The invention provides a sunk well dado excavation foundation for a power transmission line iron tower in a desert area, overcomes the defects of the prior art, and can effectively solve the problems of poor safety, overlarge foundation redundancy, great waste and low economic benefit when the existing sunk well dado excavation foundation is applied to power transmission line engineering in the desert area.
The technical scheme of the invention is realized by the following measures: a sunk well retaining wall digging foundation for a power transmission line iron tower in a desert area comprises a first retaining wall cylinder and a second retaining wall cylinder, the first wall protecting cylinder is of a cylindrical structure, a second wall protecting cylinder of a cylindrical structure and coaxial arrangement with the first wall protecting cylinder are arranged above the first wall protecting cylinder, at least one third wall protecting cylinder of a cylindrical structure is sequentially arranged between the first wall protecting cylinder and the second wall protecting cylinder from bottom to top, the third wall protecting cylinder positioned at the bottom is detachably mounted with the first wall protecting cylinder, the third wall protecting cylinder positioned at the top is detachably mounted with the second wall protecting cylinder, every two adjacent third wall protecting cylinders are detachably mounted together, the inner side of the first wall protecting cylinder, the inner side of the second wall protecting cylinder and the inner side of the third wall protecting cylinder form a foundation pit, a steel reinforcement cage with the upper end positioned above the upper end of the second wall protecting cylinder is arranged in the foundation pit, and foundation concrete is poured in the foundation pit corresponding to the outer side position of the steel reinforcement cage.
The following is further optimization or/and improvement of the technical scheme of the invention:
the first wall protecting cylinder comprises a first steel cage and a first cylinder body, the first steel cage comprises a first stirrup net, first longitudinal ribs and first steel pipes, the cross section of the first stirrup net is circular, a plurality of first steel pipes and first longitudinal ribs which are alternately and uniformly distributed are arranged on the inner side of the first stirrup net along the circumference, the first stirrup net comprises at least two first stirrups which are arranged in parallel at intervals up and down, each first stirrup is fixedly connected with the outer side of the first steel pipe at the corresponding position and the outer side of the first longitudinal rib at the corresponding position, the first cylinder body formed by concrete is poured on the outer side of the first stirrup net, the upper end surface of the first cylinder body is flush with the upper end of the first steel pipe and is positioned below the upper end of the first longitudinal rib, the lower end surface of the first cylinder body is positioned below the lower end of the first steel pipe and below the lower end of the first longitudinal rib, the second wall protecting cylinder comprises a second steel cage and a second cylinder body, the second steel cage comprises a second stirrup net, a second longitudinal rib corresponding to the first steel pipe and a second longitudinal rib corresponding to the second steel pipe, the cross section of the second stirrup net is circular, the second steel pipes and the second longitudinal ribs are alternately and uniformly distributed and are arranged on the inner side of the second stirrup net along the circumference, the second stirrup net comprises at least two second stirrups which are arranged in parallel at intervals up and down, each second stirrup is fixedly connected with the outer side of the second steel pipe at the corresponding position and the outer side of the second longitudinal rib at the corresponding position, a second cylinder body formed by concrete is poured on the outer side of the second stirrup net, the lower end surface of the second cylinder body is flush with the lower end of the second steel pipe and is positioned above the lower end of the second longitudinal rib, the third wall protecting cylinder comprises a third steel cage and a third cylinder body, the third steel cage comprises a third stirrup net, a third longitudinal rib corresponding to the second steel pipe and a third steel pipe corresponding to the second longitudinal rib, the cross section of the third stirrup net is circular, the third steel pipe and the third longitudinal rib are alternately and uniformly distributed and are arranged on the inner side of the third stirrup net along the circumference, and the third stirrup net comprises at least two third stirrups which are arranged in parallel at intervals up and down, each third stirrup is fixedly connected with the outer side of a third steel pipe in a corresponding position and the outer side of a third longitudinal bar in a corresponding position, a third barrel formed by concrete is poured on the outer side of a third stirrup net, the upper end surface of the third barrel is flush with the upper end of the third steel pipe and is positioned below the upper end of the third longitudinal bar, the lower end surface of the third barrel is flush with the lower end of the third steel pipe and is positioned above the lower end of the third longitudinal bar, the inner side of the lower end of the third steel pipe of the lowermost third retaining wall barrel is detachably sleeved on the outer side of the upper end of the first longitudinal bar in the corresponding position, the outer side of the lower end of the third longitudinal bar of the lowermost third retaining wall barrel is detachably inserted into the inner side of the upper end of the first steel pipe in the corresponding position, between every two adjacent third retaining wall barrels, the inner side of the lower end of the third steel pipe of the upper third retaining wall barrel is detachably sleeved on the outer side of the corresponding position of the lower third retaining wall barrel, and the outer side of the lower end of the third longitudinal bar of the upper third The third steel pipe upper end inboard of putting, the third steel pipe upper end inboard that is located the third wall protecting section of thick bamboo of the top can be dismantled the suit and indulge the muscle lower extreme outside in the second that corresponds the position, and the third that is located the third wall protecting section of thick bamboo of the top indulges the muscle upper end outside and can dismantle and insert and locate the second steel pipe lower extreme inboard that corresponds the position, first barrel inboard, second barrel inboard and the inboard foundation ditch that forms of third barrel is equipped with the steel reinforcement cage that the upper end is located second barrel upper end top in the foundation ditch, and the foundation concrete has been pour in the foundation ditch that corresponds steel reinforcement cage outside position.
The outer side surface of the lower end of the first cylinder and the inner side surface of the lower end of the first cylinder can be conical surfaces with a large upper part and a small lower part.
But fixedly connected with first liner between the muscle outside is indulged to above-mentioned first and the first stirrup is inboard, and fixedly connected with second liner between the muscle outside is indulged to the second and the second stirrup is inboard, and fixedly connected with third liner between the muscle outside is indulged to the third and the third stirrup is inboard.
The number of the first stirrups, the number of the second stirrups and the number of the third stirrups can be between two and three.
The number of the first steel pipes and the number of the first longitudinal ribs can be between four and six.
The outer sides of the first steel cage, the second steel cage and the third steel cage can be provided with anticorrosive coatings.
The number of the third wall protecting cylinders can be between one and four.
The invention has reasonable and compact structure, can meet the foundation requirements of different specifications by adjusting the number of the third wall protection cylinders, has wide application range, can be detachably installed together, can be convenient for field installation, can also prefabricate the wall protection cylinders firstly, reduce the labor intensity and improve the field operation efficiency, can be convenient for the installation of the later-stage transmission line iron tower by arranging the reinforcement cage, can solve the problems of great waste and low economic benefit caused by poor foundation safety, overlarge foundation redundancy and the like of the transmission line iron tower in desert areas with limited field supporting conditions, nervous water sources and the like, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.
Drawings
FIG. 1 is a schematic sectional view of the present invention.
Fig. 2 is a schematic top sectional enlarged view of the second cylinder shown in fig. 1.
FIG. 3 is a schematic diagram showing an enlarged top view of the joint of two adjacent third cylinders in FIG. 1.
The codes in the figures are respectively: the steel reinforcement cage is characterized in that the steel reinforcement cage is 1, the foundation concrete is 2, the first cylinder is 3, the second cylinder is 4, the third cylinder is 5, the first stirrup is 6, the first longitudinal rib is 7, the first steel pipe is 8, the second stirrup is 9, the second longitudinal rib is 10, the second steel pipe is 11, the third stirrup is 12, the third longitudinal rib is 13, the third steel pipe is 14, the first gasket is 15, the second gasket is 16, and the third gasket is 17.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the respective parts is described with reference to the direction in which the observer is located in the tractor cab and faces the forward direction of the present invention, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and figures:
as shown in attached figures 1, 2 and 3, the open caisson dado excavation foundation for the power transmission line iron tower in the desert area comprises a first dado cylinder, a second dado cylinder, a third dado cylinder and a reinforcement cage 1, wherein the first dado cylinder is of a cylindrical structure, the second dado cylinder of the cylindrical structure is coaxially arranged above the first dado cylinder, at least one third dado cylinder of the cylindrical structure is sequentially arranged between the first dado cylinder and the second dado cylinder from bottom to top, the third dado cylinder and the first dado cylinder which are positioned at the lowest part are detachably arranged together, the third dado cylinder and the second dado cylinder which are positioned at the highest part are detachably arranged together, every two adjacent third dado cylinders can be detachably arranged together, the inner side of the first dado cylinder, the inner side of the second dado cylinder and the inner side of the third dado cylinder form a foundation pit, the reinforcement cage 1 with the upper end positioned above the second dado cylinder is arranged in the foundation pit, and foundation concrete 2 is poured in the foundation pit corresponding to the outer side position of the reinforcement cage 1.
In the using process, the first wall-protecting cylinder, the second wall-protecting cylinder and the third wall-protecting cylinder are arranged, the basic requirements of different specifications can be met by adjusting the number of the third wall-protecting cylinders, the application range is wide, through detachable installation, the on-site installation is convenient, the prefabricated wall protection cylinder can be performed in advance, the labor intensity is reduced, the on-site operation efficiency is improved, by arranging the reinforcement cage 1, the installation of the transmission line iron tower at the later stage can be facilitated, the field manual work amount and the work procedures are reduced, the construction efficiency is improved, meanwhile, compared with cast-in-place, the quality is better guaranteed, the engineering construction standard is improved, quality safety accidents are reduced, the engineering cost is integrally reduced, and the problems of great waste and low economic benefit caused by poor foundation safety and overlarge foundation redundancy of the power transmission line iron tower can be solved in desert areas with limited on-site supporting conditions, short water source and other severe conditions. The invention has the characteristics of reasonable and compact structure, convenient use, safety, labor saving, simplicity, convenience and high efficiency.
The open caisson dado excavation foundation for the power transmission line iron tower in the desert area can be further optimized or/and improved according to actual needs:
as shown in fig. 1, 2 and 3, the first wall protecting cylinder comprises a first steel cage and a first cylinder 3, the first steel cage comprises a first stirrup net, a first longitudinal rib 7 and a first steel pipe 8, the cross section of the first stirrup net is circular, a plurality of first steel pipes 8 and first longitudinal ribs 7 which are alternately and uniformly distributed are arranged on the inner side of the first stirrup net along the circumference, the first stirrup net comprises at least two first stirrups 6 which are arranged in parallel at intervals from top to bottom, each first stirrup 6 is fixedly connected with the outer side of the first steel pipe 8 at the corresponding position and the outer side of the first longitudinal rib 7 at the corresponding position, the first cylinder 3 formed by concrete is poured on the outer side of the first stirrup net, the upper end surface of the first cylinder 3 is flush with the upper end of the first steel pipe 8 and is positioned below the upper end of the first longitudinal rib 7, and the lower end surface of the first cylinder 3 is positioned below the lower end of the first steel pipe 8 and below the lower end of the first longitudinal rib 7;
the second wall protecting cylinder comprises a second steel cage and a second cylinder body 4, the second steel cage comprises a second stirrup net, second longitudinal ribs 10 corresponding to the first steel pipes 8 and second steel pipes 11 corresponding to the first longitudinal ribs 7, the cross section of the second stirrup net is circular, the second steel pipes 11 and the second longitudinal ribs 10 are alternately and uniformly distributed and are arranged on the inner sides of the second stirrup net along the circumference, the second stirrup net comprises at least two second stirrups 9 which are arranged in parallel at intervals up and down, each second stirrup 9 is fixedly connected with the outer side of the second steel pipe 11 at the corresponding position and the outer side of the second longitudinal rib 10 at the corresponding position, the second cylinder body 4 formed by concrete is poured on the outer side of the second stirrup net, and the lower end face of the second cylinder body 4 is flush with the lower end of the second steel pipe 11 and is positioned above the lower end of the second longitudinal rib 10;
the third wall-protecting cylinder comprises a third steel cage and a third cylinder body 5, the third steel cage comprises a third stirrup net, the cross section of a third stirrup net is circular, the third steel pipes 14 and the third longitudinal reinforcements 13 are alternately and uniformly distributed and are arranged on the inner side of the third stirrup net along the circumference, the third stirrup net comprises at least two third stirrups 12 which are arranged in parallel at intervals up and down, each third stirrup 12 is fixedly connected with the outer side of the corresponding third steel pipe 14 and the outer side of the corresponding third longitudinal reinforcement 13, a third cylinder 5 formed by concrete is poured on the outer side of the third stirrup net, the upper end surface of the third cylinder 5 is flush with the upper end of the third steel pipe 14 and is positioned below the upper end of the third longitudinal reinforcement 13, and the lower end surface of the third cylinder 5 is flush with the lower end of the third steel pipe 14 and is positioned above the lower end of the third longitudinal reinforcement 13;
the inner side of the lower end of a third steel pipe 14 of the third wall protecting cylinder positioned at the lowest part is detachably sleeved on the outer side of the upper end of the first longitudinal rib 7 at the corresponding position, and the outer side of the lower end of a third longitudinal rib 13 of the third wall protecting cylinder positioned at the lowest part is detachably inserted into the inner side of the upper end of the first steel pipe 8 at the corresponding position;
between every two adjacent third retaining wall cylinders, the inner side of the lower end of a third steel pipe 14 of the upper third retaining wall cylinder is detachably sleeved on the outer side of the upper end of a third longitudinal rib 13 at the corresponding position of the lower third retaining wall cylinder, and the outer side of the lower end of the third longitudinal rib 13 of the upper third retaining wall cylinder is detachably inserted into the inner side of the upper end of the third steel pipe 14 at the corresponding position of the lower third retaining wall cylinder;
the inner side of the upper end of a third steel pipe 14 of the third wall protecting cylinder positioned at the top is detachably sleeved on the outer side of the lower end of a second longitudinal rib 10 at the corresponding position, and the outer side of the upper end of a third longitudinal rib 13 of the third wall protecting cylinder positioned at the top is detachably inserted into the inner side of the lower end of a second steel pipe 11 at the corresponding position;
the first barrel 3 inboard, the second barrel 4 inboard and the 5 inboard foundation pits that form of third barrel are equipped with the steel reinforcement cage 1 that the upper end is located 4 upper ends tops of second barrel in the foundation pit, and basic concrete 2 has been pour in the foundation pit that corresponds 1 outside positions of steel reinforcement cage.
According to the requirement, the upper end surface of the second cylinder 4 is positioned above the upper end of the second steel pipe 11 and above the upper end of the second longitudinal rib 10. In the use, through such setting, can prefabricate first protecting wall section of thick bamboo, second protecting wall section of thick bamboo and third protecting wall section of thick bamboo earlier, it is very convenient to the butt joint mounting means of this kind of disect insertion in desert area, the on-the-spot operation degree of difficulty that has significantly reduced, through setting up the barrel, can protect the steel cage, can increase the pressure between sand and the barrel simultaneously, the stability of reinforcing basis. The industrial processing of the transmission line tower foundation is realized, the field manual work amount and the operation procedures are reduced, the construction efficiency is improved, meanwhile, the quality is more guaranteed compared with the field pouring, the engineering construction standard is improved, the quality safety accidents are reduced, and the engineering cost is integrally reduced.
As shown in fig. 1, the outer side surface of the lower end and the inner side surface of the lower end of the first cylinder 3 are both tapered surfaces with a large upper part and a small lower part.
In the use, through setting up the conical surface, can make first barrel 3 rely on the dead weight to sink, reduce the construction degree of difficulty, can increase the joint strength between basic concrete 2 and the first barrel 3 simultaneously.
As shown in fig. 1 and 2, a first liner 15 is fixedly connected between the outer side of the first longitudinal rib 7 and the inner side of the first stirrup 6, a second liner 16 is fixedly connected between the outer side of the second longitudinal rib 10 and the inner side of the second stirrup 9, and a third liner 17 is fixedly connected between the outer side of the third longitudinal rib 13 and the inner side of the third stirrup 12.
The thickness of the liner is the same as the wall thickness of the steel pipe, as required. In the use, because the steel pipe has certain wall thickness, through such setting, make things convenient for in the reinforcing bar inserts the steel pipe, also can improve the joint strength between reinforcing bar and the stirrup.
As shown in fig. 1 and 2, the number of the first stirrups 6, the number of the second stirrups 9 and the number of the third stirrups 12 are between two and three.
In the use, through such setting, can improve the intensity of first steel cage, second steel cage and third steel cage, and then improve the intensity of first barrel 3, second barrel 4 and third barrel 5, can avoid the steel cage to warp the quality that reduces the barrel when concreting simultaneously.
As shown in fig. 1, the number of the first steel pipes 8 and the number of the first longitudinal ribs 7 are between four and six.
In the use, through such setting, first steel cage, second steel cage and third steel cage of preparation in large batch can reduction in production cost, stability when also can guarantee the installation of third dado section of thick bamboo and first dado section of thick bamboo.
As shown in attached figure 1, the outer sides of the first steel cage, the second steel cage and the third steel cage are all provided with anticorrosive coatings.
In the use, through such setting, can avoid the steel cage to be corroded, at increase of service life.
As shown in fig. 1, the number of the third wall-protecting cylinders ranges from one to four.
In the use process, the length of the first cylinder 3 is subtracted from the designed depth of the third wall protection cylinders, and then the length of the second cylinder 4 is subtracted, and the obtained value is divided by the length of the single third cylinder 5 to obtain the third wall protection cylinder.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. A sunk well dado digging foundation for a power transmission line iron tower in a desert area is characterized by comprising a first dado cylinder, a second dado cylinder, a third dado cylinder and a reinforcement cage, wherein the first dado cylinder is of a cylindrical structure, the second dado cylinder of the cylindrical structure is coaxially arranged above the first dado cylinder, at least one third dado cylinder of the cylindrical structure is sequentially arranged between the first dado cylinder and the second dado cylinder from bottom to top, the third dado cylinder positioned at the lowest part and the first dado cylinder are detachably arranged together, the third dado cylinder positioned at the highest part and the second dado cylinder are detachably arranged together, every two adjacent third dado cylinders can be detachably arranged together, a foundation pit is formed at the inner side of the first dado cylinder, the inner side of the second dado cylinder and the inner side of the third dado cylinder, the reinforcement cage with the upper end positioned above the upper end of the second dado cylinder is arranged in the foundation pit, and foundation concrete is poured in the foundation pit corresponding to the outer side position of the reinforcement cage.
2. The sunk well dado foundation for the power transmission line iron tower in the desert area as claimed in claim 1, wherein the first dado cylinder comprises a first steel cage and a first cylinder body, the first steel cage comprises a first stirrup net, a first longitudinal bar and a first steel pipe, the cross section of the first stirrup net is circular, the inner side of the first stirrup net is circumferentially provided with a plurality of first steel pipes and first longitudinal bars which are alternately and uniformly distributed, the first stirrup net comprises at least two first stirrups which are arranged in parallel at intervals up and down, each first stirrup is fixedly connected with the outer side of the first steel pipe at the corresponding position and the outer side of the first longitudinal bar at the corresponding position, the outer side of the first stirrup net is cast with the first cylinder body formed by concrete, the upper end surface of the first cylinder body is flush with the upper end of the first steel pipe and is positioned below the upper end of the first longitudinal bar, the lower end surface of the first cylinder body is positioned below the lower end of the first steel pipe and below the lower end of the first longitudinal bar, the second wall protecting cylinder comprises a second steel cage and a second cylinder body, the second steel cage comprises a second stirrup net, second longitudinal ribs corresponding to the first steel pipes and second steel pipes corresponding to the first longitudinal ribs, the cross section of the second stirrup net is circular, the second steel pipes and the second longitudinal ribs are alternately and uniformly distributed and are arranged at the inner side of the second stirrup net along the circumference, the second stirrup net comprises at least two second stirrups which are arranged in parallel at intervals up and down, each second stirrup is fixedly connected with the outer side of the second steel pipe at the corresponding position and the outer side of the second longitudinal rib at the corresponding position, the second cylinder body formed by concrete is poured at the outer side of the second stirrup net, the lower end surface of the second cylinder body is flush with the lower end of the second steel pipe and is positioned above the lower end of the second longitudinal rib, the third wall protecting cylinder comprises a third steel cage and a third cylinder body, the third steel cage comprises a third stirrup net, third longitudinal ribs corresponding to the second steel pipes and third steel pipes corresponding to the second longitudinal ribs, the cross section of the third stirrup net is circular, the third steel pipes and the third longitudinal bars are alternately and uniformly distributed and are arranged on the inner side of the third stirrup net along the circumference, the third stirrup net comprises at least two third stirrups which are arranged in parallel at intervals up and down, each third stirrup is fixedly connected with the outer side of the third steel pipe at the corresponding position and the outer side of the third longitudinal bar at the corresponding position, a third cylinder body formed by concrete is poured on the outer side of the third stirrup net, the upper end surface of the third cylinder body is flush with the upper end of the third steel pipe and is positioned below the upper end of the third longitudinal bar, the lower end surface of the third cylinder body is flush with the lower end of the third steel pipe and is positioned above the lower end of the third longitudinal bar, the inner side of the lower end of the third steel pipe of the third wall protection cylinder positioned at the lowest part is detachably sleeved on the outer side of the upper end of the first longitudinal bar at the corresponding position, the outer side of the lower end of the third longitudinal bar of the third wall protection cylinder positioned, between every two adjacent third retaining wall cylinders, the inner side of the lower end of a third steel pipe of the upper third retaining wall cylinder is detachably sleeved on the outer side of the upper end of a third longitudinal rib at the corresponding position of the lower third retaining wall cylinder, the outer side of the lower end of the third longitudinal rib of the upper third retaining wall cylinder is detachably inserted into the inner side of the upper end of a third steel pipe at the corresponding position of the lower third retaining wall cylinder, the inner side of the upper end of the third steel pipe of the uppermost third retaining wall cylinder is detachably sleeved on the outer side of the lower end of a second longitudinal rib at the corresponding position, the outer side of the upper end of the third longitudinal rib of the uppermost third retaining wall cylinder is detachably inserted into the inner side of the lower end of the second steel pipe at the corresponding position, and the inner side, the second barrel is inboard and the third barrel is inboard forms the foundation ditch, is equipped with the steel reinforcement cage that the upper end is located second barrel upper end top in the foundation ditch, has pour basic concrete in the foundation ditch that corresponds steel reinforcement cage outside position.
3. The open caisson dado foundation for the power transmission line towers in the desert areas as claimed in claim 2, wherein the outer side surface of the lower end and the inner side surface of the lower end of the first cylinder are conical surfaces with a large upper part and a small lower part.
4. The sunk well dado foundation for the power transmission line iron tower in the desert area as claimed in claim 2 or 3, wherein a first liner is fixedly connected between the outer side of the first longitudinal rib and the inner side of the first stirrup, a second liner is fixedly connected between the outer side of the second longitudinal rib and the inner side of the second stirrup, and a third liner is fixedly connected between the outer side of the third longitudinal rib and the inner side of the third stirrup.
5. The sunk well dado foundation for the power transmission line iron tower in the desert area as claimed in claim 2 or 3, wherein the number of the first stirrups, the number of the second stirrups and the number of the third stirrups are all between two and three; or/and the number of the first steel pipes and the number of the first longitudinal ribs are between four and six.
6. The sunk well dado foundation for the power transmission line iron tower in the desert area as claimed in claim 4, wherein the number of the first stirrups, the number of the second stirrups and the number of the third stirrups are between two and three; or/and the number of the first steel pipes and the number of the first longitudinal ribs are between four and six.
7. The sunk well dado foundation for the power transmission line iron tower in the desert area as claimed in claim 2, 3 or 6, wherein an anticorrosive layer is arranged on the outer side of the first steel cage, the outer side of the second steel cage and the outer side of the third steel cage.
8. The sunk well dado foundation for the power transmission line iron tower in the desert area as claimed in claim 4, wherein an anticorrosive layer is arranged on the outer side of the first steel cage, the outer side of the second steel cage and the outer side of the third steel cage.
9. The sunk well dado foundation for the power transmission line iron tower in the desert area as claimed in claim 5, wherein an anticorrosive layer is arranged on the outer side of the first steel cage, the outer side of the second steel cage and the outer side of the third steel cage.
10. The open caisson dado excavation foundation for the power transmission line towers in the desert areas as claimed in claim 1, 2, 3, 6, 8 or 9, wherein the number of the third dado cylinders is between one and four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011248391.0A CN112323845A (en) | 2020-11-10 | 2020-11-10 | Open caisson dado digging foundation for power transmission line iron tower in desert area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011248391.0A CN112323845A (en) | 2020-11-10 | 2020-11-10 | Open caisson dado digging foundation for power transmission line iron tower in desert area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112323845A true CN112323845A (en) | 2021-02-05 |
Family
ID=74317710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011248391.0A Pending CN112323845A (en) | 2020-11-10 | 2020-11-10 | Open caisson dado digging foundation for power transmission line iron tower in desert area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112323845A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718098A (en) * | 2009-11-09 | 2010-06-02 | 中国电力科学研究院 | Micro-pile combined dug composite foundation and construction method thereof |
| CN102828525A (en) * | 2012-08-16 | 2012-12-19 | 国核电力规划设计研究院 | Foundation structure of power transmission line tower |
| CN203654311U (en) * | 2013-12-15 | 2014-06-18 | 河南省电力勘测设计院 | Novel retaining wall of mechanical hole-forming excavated foundation |
| CN109826224A (en) * | 2019-03-08 | 2019-05-31 | 中国能源建设集团安徽省电力设计院有限公司 | A kind of sinking well protection wall digging foundation and its construction method for desert region iron tower of power transmission line |
-
2020
- 2020-11-10 CN CN202011248391.0A patent/CN112323845A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718098A (en) * | 2009-11-09 | 2010-06-02 | 中国电力科学研究院 | Micro-pile combined dug composite foundation and construction method thereof |
| CN102828525A (en) * | 2012-08-16 | 2012-12-19 | 国核电力规划设计研究院 | Foundation structure of power transmission line tower |
| CN203654311U (en) * | 2013-12-15 | 2014-06-18 | 河南省电力勘测设计院 | Novel retaining wall of mechanical hole-forming excavated foundation |
| CN109826224A (en) * | 2019-03-08 | 2019-05-31 | 中国能源建设集团安徽省电力设计院有限公司 | A kind of sinking well protection wall digging foundation and its construction method for desert region iron tower of power transmission line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108914931B (en) | Assembled vertical shield annular foundation pile and construction method | |
| CN110486018B (en) | Lattice type composite shaft structure and construction method | |
| CN108547641B (en) | Substrate reinforcing system of heavy-duty railway tunnel in water-rich weak stratum and construction method thereof | |
| CN210086275U (en) | Double-wall hollow open caisson foundation | |
| CN212452715U (en) | Burst prefabricated construction of dark heavy open caisson | |
| CN210315632U (en) | Annular underground diaphragm wall foundation of large-span arch bridge in deep coverage area | |
| CN104074197B (en) | The construction method of large diameter thin wall cylinder stake compound anchor rod-type foundation pit enclosure structure | |
| CN203594041U (en) | Piled raft structure with good resistance to seepage and buoyancy | |
| CN104499494B (en) | Double-wall corrugated steel cofferdam | |
| CN109989346B (en) | Bridge large-diameter precast concrete tubular column foundation and construction method thereof | |
| CN111424697A (en) | Construction method for prefabricating deep and large open caisson by slicing | |
| CN217325391U (en) | Construction tool for high-speed rail line deep foundation pit secant pile | |
| CN209277165U (en) | A kind of detachable lightweight assembled pattern foundation pit supporting structure | |
| CN214657177U (en) | Open caisson dado digging device for power transmission line iron tower | |
| CN112323845A (en) | Open caisson dado digging foundation for power transmission line iron tower in desert area | |
| CN210122735U (en) | Underground structure anti-floating system based on outward-protruding wing foot plate | |
| CN211621666U (en) | Full-paved long and short pile composite foundation-barrel offshore wind power foundation | |
| CN212801549U (en) | H-shaped double-row steel sheet pile supporting structure | |
| CN112942377A (en) | Novel support shear-resistant structure and construction method thereof | |
| CN211312479U (en) | Hollow column hammer | |
| CN110847215A (en) | Full-paved long and short pile composite foundation-barrel offshore wind power foundation and construction method | |
| CN110777827A (en) | Structure capable of carrying out deep water area hollowing repair in rapid stream state | |
| CN216515623U (en) | Soft soil foundation underground pipe gallery underground structure | |
| CN114482070B (en) | Construction tool and construction method for temporary high-speed railway line deep foundation pit occluding pile | |
| CN210482372U (en) | Hexagonal pipe gallery system combined with main structure through inclined support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210205 |