CN212641496U

CN212641496U - Compound basis of transmission line high strength tubular pile

Info

Publication number: CN212641496U
Application number: CN202020560241.2U
Authority: CN
Inventors: 朱佳宏
Original assignee: Ziquan Energy Technology Co ltd
Current assignee: Ziquan Energy Technology Co ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2021-03-02
Anticipated expiration: 2030-04-16

Abstract

The utility model discloses a compound basis of transmission line high strength tubular pile, including the tubular pile, the upper portion of tubular pile is connected through alternately linking the roof beam, alternately has pour the cushion cap at the top of linking the roof beam, during the top of tubular pile stretches into the cushion cap, the inside layer board that is fixed with of tubular pile, settle at the layer board top has the anchor reinforcing bar, during the end of anchor reinforcing bar stretches into the cushion cap, runs through threaded reinforcement in the tubular pile, and threaded reinforcement stretches out the tip and the bar connection of tubular pile, the reinforcing bar anchor inside the cushion cap, threaded reinforcement pass the sleeve in the tubular pile, its length inside the tubular pile is sleeve length and 40 times threaded reinforcement diameter sum. The prestressed concrete pipe pile adopted by the utility model can be produced in a factory, is not influenced by the field climate conditions, and the quality of the pile body is easy to guarantee; the comprehensive investment cost of newly-built line engineering can be reduced, the construction period of the line engineering is shortened, the noise is low, the vibration and the pollution are avoided, and the construction environment is effectively improved.

Description

Compound basis of transmission line high strength tubular pile

Technical Field

The utility model relates to a compound basis of high strength tubular pile especially relates to a compound basis of transmission line high strength tubular pile.

Background

At present, economic construction of China is rapidly developed and urbanization pace is accelerated, social electricity consumption demand is greatly increased, and particularly, in provinces and cities with developed coastal economy in the east of China, records are continuously refreshed in peak electricity consumption; on the other hand, in northwest of China, electric power developed by clean energy such as wind resource, solar energy, water energy and the like is available everywhere. The national strategy 'West electric and east electric power transmission' just solves the imbalance of electric power development in the region, and national power grid companies and southern power grid companies build 'five-to-straight' extra-high voltage large channels respectively, so that the power transmission line construction is expected to be more and more intensive in the future.

Aiming at the current situation, if the high-strength pipe pile composite foundation of the power transmission line is popularized and applied in the construction of a power transmission network, the comprehensive investment cost of a newly-built line project is reduced, the construction period of the line project is shortened, and the construction environment is effectively improved.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a can reduce engineering cost, shorten construction cycle's compound basis of transmission line high strength tubular pile.

The technical scheme is as follows: the utility model discloses a tubular pile, the upper portion of tubular pile is connected through alternately linking the roof beam, and alternately the top of linking the roof beam has been pour the cushion cap, and during the top of tubular pile stretched into the cushion cap, the inside layer board that is fixed with of tubular pile, the arrangement of layer board top had the anchor reinforcing bar, the end of anchor reinforcing bar stretched into the cushion cap, it has the twisted steel to run through in the tubular pile, the twisted steel stretches out the tip and the bar connection of tubular pile, the reinforcing bar anchor in the cushion cap.

The twisted steel penetrates through a sleeve in the tubular pile, and the length of the twisted steel in the tubular pile is equal to the sum of the length of the sleeve and the diameter of the twisted steel which is 40 times of the length of the sleeve.

The joint of the twisted steel bar and the steel bar is connected with a mechanical sleeve.

And a plurality of stirrups are bound on the outer side of the anchoring steel bar at intervals.

The pipe pile is filled with concrete, and the concrete is separated by using the supporting plate.

The concrete is fine stone micro-expansion concrete.

Has the advantages that: the utility model has the advantages of it is following:

(1) the prestressed concrete pipe pile adopted by the utility model can be produced in a factory, is not influenced by field climate conditions, is easy to ensure the quality of the pile body, reduces the comprehensive investment cost of newly-built line engineering, shortens the construction period of line engineering, has low noise, no vibration and no pollution, and effectively improves the construction environment;

(2) the piles are connected by adopting cross connecting beams, so that all parts of the foundation are connected more tightly, and the integral stress is more favorable;

(3) because the contact surface of the pile feeder and the pile head of the engineering pile is well matched, the pile feeder cannot sway left and right and jump up and down in the pile feeding process, so that the pile can be fed deeply, and the cut-off amount of the excavated foundation is small;

(4) the stress caused by pile pressing in construction is small, the pile body can not generate tensile stress in the construction process, the pile head is generally intact, and the re-pressing is easy;

(5) the prefabricated piles are connected mechanically, and the steel bars at the top end are connected with the bearing platform in a mechanical sleeve mode, so that the bearing platform and the piles are connected more tightly.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a bottom view of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and 2, the utility model discloses a prestressing force high strength concrete tubular pile 9, tubular pile 9's upper portion is connected through alternately linking roof beam 8 for increase the overall stability between single pile and the single pile. The top of the cross connecting beam 8 is poured with the bearing platform 2, and the top of the tubular pile 9 extends into the bearing platform 2. The inside layer board 7 that is fixed with of tubular pile 9, layer board 7 top is settled there is anchor reinforcing bar 6, and anchor reinforcing bar 6 outside interval has been tied up a plurality of stirrups. The end of the anchoring bar 6 extends into the bearing platform 2 for connecting the bearing platform 2 and the tubular pile 9. Be equipped with sleeve 3 in the tubular pile 9, sleeve 3 extends the pile bolck from the stake is inside, and it has twisted steel 4 to run through in the sleeve 3, and length that twisted steel 4 stretched into in the stake is sleeve 3's length plus 40 times twisted steel 4's diameter, and twisted steel 4 stretches out the tip and the reinforcing bar 1 of tubular pile 9 and is connected, and the junction links up there is mechanical sleeve, and reinforcing bar 1 anchor is in cushion cap 2. The interior of the tubular pile 9 is filled with fine stone micro-expansion concrete 5 and is separated by a supporting plate 7.

The utility model discloses a concrete construction process does:

(1) mechanical selection

According to the field topographic conditions, the pile foundation adopts a crawler-type pile driver, and matched pile hammers (for example: the pile hammer D80, the impact force is 8000-10000kN, and is suitable for the phi 600 mm-phi 800mm pipe pile) are selected according to geological conditions, the pile type, the soil penetration length and the like.

(2) Pile forming age requirement

The gap between the pipe pile and the pile driving construction is preferably as long as possible, the concrete strength is required to reach above the standard value of the designed strength grade, a certain amount of piles are required to be stored on site, the pipe pile meets the requirement of the strength of the pipe pile according to the principle of 'firstly driving firstly', and the quality problem of the concrete is required to be checked one by one before the pipe pile construction.

(3) Pile construction process

In the construction aspect, a PCMW construction method is adopted, namely a three-shaft mixing pile drilling machine is used for cutting soil in an original stratum, cement grout is injected into the front end of the drilling machine at low pressure, the cement grout and the cut soil are fully stirred to form a cement column type retaining wall with high water-resisting property, and a supporting tubular pile is inserted before the cement grout is not hardened.

It is difficult to correct the angle of the pile during driving and so it is placed correctly in position. When the 1 st section pipe pile is inserted into the ground, the position and the direction are kept correct as much as possible. And (4) carefully checking, if deviation exists, timely correcting, and pulling out and reinserting if necessary. The verticality of the checking pile can be observed by a right-angle observation method, namely, 2 directions (90 directions) of theodolites are used for observation, and the verticality of the guide frame is ensured. The adjustment is carried out through the rotation, the sliding and the stopping of the pile machine guide frame. The theodolite should be placed at a location not affected by piling and be constantly leveled to maintain accurate observation.

1) Hammering device

Because the earth's surface is softer, the sinking amount is larger during the initial driving, should adopt the low hammer of lifting to beat lightly, along with the pile sinking deepening, the sinking speed slows down, and the hammer-lifting height can increase gradually. During the whole piling process, pile pads are required to be placed so as to prevent the pile heads from being damaged. The pile hammer, the pile cap and the pile body are kept on the same axis as much as possible. If necessary, the direction of the pile hammer and the guide rod of the pile frame should be adjusted according to the direction of the pile body. Care should be taken not to make the pipe pile eccentrically hammered as much as possible to avoid the pipe pile being damaged by bending. When the pile is difficult to sink, whether the drop hammer has inclined eccentricity or not needs to be checked, particularly whether the pile pad pile cap is suitable or not needs to be checked, and if the pile pad pile cap is not suitable, the soft cushion needs to be replaced or supplemented. Each pile needs to be driven continuously for one time without interruption, so that the pile is difficult to continue to be driven.

2) Pile extension

The two ends of the butted pipe pile are cleaned, and the welded surface is cleaned when paint impurities are polluted. Pile extension welding by using CO₂And (3) gas damage arc welding process. When the tubular pile joint is welded, mud removal, dirt removal, rust removal and drying are carried out on a weld joint area, the cleaning and the exposure of metal luster are achieved, and an upper pile and a lower pile are in straight correspondence when the pile is pulled.

3) Pile feeding device

The pile-feeding depth is 2.5m below the ground surface, and a 3m long pile-feeding device is adopted. When the upper section of pile is sunk to be 0.6-0.8 m away from the ground, the pile feeder is sleeved, the pile frame is adjusted to enable the pile feeder to be in contact with the pile top to be flat and solid, the pile feeder and the pile axis are aligned, then the hammer is opened to feed the pile, and the pile is continuously hammered until the designed elevation of the pile top is reached. The reinforcing steel bars at the top end are connected with the bearing platform in a mechanical sleeve mode, and length marks are carved on the pile feeder before construction, so that pile top elevation control is facilitated. In the pile sinking and pile feeding processes, a measurer always observes the condition of the pile entering the soil through an instrument and records the hammering number.

(4) The pile head is connected with the bearing platform

1) Filling pipe holes: 4 anchoring steel bars with the diameter of 32mm are inserted into the tubular pile, the anchoring steel bars extend into the pile for 2.5m, a supporting plate is arranged at the bottom of the tubular pile, and C40 fine stone micro-expansion concrete is filled on the supporting plate to the top of the pile.

2) Mechanical sleeve connects the twisted steel and the steel: the reinforcing bar on pile head top adopts mechanical sleeve mode and the inside screw-thread steel bar of stake to set up the spiral stirrup of interval 100mm in the outside of anchor reinforcing bar, inside the anchor reinforcing bar stretched into cushion cap, in order to play the anchoring effect.

(5) Crossed connecting beam construction process

1) Installing a template: after the pile is driven, in order to ensure the stability between single piles, cross-shaped crossed connecting beams are poured between the piles for connecting the piles, and bamboo plywood assembling templates are adopted for splicing and splicing.

2) Reinforcing steel bars: the reinforcing steel bars are purchased according to requirements, the mounting and overlapping are carried out according to the mounting sequence from the bottom plate to the top plate, the positions of the reinforcing steel bars are accurate, the positioning is firm, and when the individual reinforcing steel bars conflict with the adjacent reinforcing steel bars, the positioning priority is as follows: prestressed tendons, main tendons and constructional tendons.

3) Pouring concrete; the concrete is supplied in a centralized way by a concrete mixing station, transported by a concrete tank truck, poured by an automobile pump and vibrated by an insertion vibrator. The performance requirement and quality control of the concrete meet the design and specification requirements, and because the steel bars in the measuring body are dense, the quick insertion and the slow pulling need to be paid attention to during vibration, and the vibration time is suitable for preventing the concrete from sinking and bubbling and slightly slurrying. After the concrete pouring is finished, the elastic deformation of the template is measured in time and is compared and analyzed with the prepressing result. The concrete is maintained by a natural maintenance method, the relative humidity is kept above 60%, and the natural maintenance is not less than 14 days.

Claims

1. The utility model provides a compound basis of transmission line high strength tubular pile, a serial communication port, including tubular pile (9), the upper portion of tubular pile (9) is connected through alternately linking roof beam (8), alternately links roof beam (8) top and has pour cushion cap (2), during the top of tubular pile (9) stretched into cushion cap (2), tubular pile (9) inside be fixed with layer board (7), settle at layer board (7) top has anchor reinforcing bar (6), during the end of anchor reinforcing bar (6) stretches into cushion cap (2), it has threaded reinforcement (4) to run through in tubular pile (9), the tip that threaded reinforcement (4) stretch out tubular pile (9) is connected with reinforcing bar (1), reinforcing bar (1) anchor in cushion cap (2).

2. The composite foundation of the high-strength tubular pile for the power transmission line according to claim 1, wherein the threaded steel bars (4) penetrate through the sleeves (3) in the tubular pile (9), and the length of the threaded steel bars (4) inside the tubular pile (9) is the sum of the length of the sleeves (3) and the diameter of the threaded steel bars (4) which is 40 times of the length of the sleeves.

3. The composite foundation of the high-strength pipe piles of the power transmission line according to claim 1 or 2, wherein a mechanical sleeve is connected to the joint of the threaded steel bar (4) and the steel bar (1).

4. The power transmission line high-strength pipe pile composite foundation according to claim 1, wherein a plurality of stirrups are bound on the outer side of the anchoring steel bars (6) at intervals.

5. The power transmission line high-strength tubular pile composite foundation as claimed in claim 1, wherein the interior of the tubular pile (9) is filled with concrete, and the concrete is separated by a supporting plate (7).

6. The power transmission line high-strength pipe pile composite foundation according to claim 5, wherein the concrete is fine-stone micro-expansion concrete (5).