CN215367223U

CN215367223U - Pile head structure for post-grouting of rock-socketed pile

Info

Publication number: CN215367223U
Application number: CN202120042578.9U
Authority: CN
Inventors: 江泳; 管玉国; 葛雄宗
Original assignee: Future Land Holdings Group Co ltd
Current assignee: Future Land Holdings Group Co ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2021-12-31
Anticipated expiration: 2031-01-08

Abstract

The utility model relates to a pile head structure for grouting after rock-socketed piles, which comprises a pile hole, wherein a pile body is arranged in the pile hole, a super-grouting area is arranged below the pile top of the pile body, a hollow pile processing area is arranged between the pile top of the pile body and the ground, the pile body comprises a plurality of pile longitudinal ribs which are annularly arranged, spiral stirrups are arranged on the plurality of pile longitudinal ribs in the super-grouting area, a left grouting pipe and a right grouting pipe are arranged on the spiral stirrups, a plurality of additional fixed stirrups are arranged on the plurality of pile longitudinal ribs at intervals above and below the hollow pile processing area, the left grouting pipe and the right grouting pipe are connected with the plurality of additional fixed stirrups, first concrete is poured in the super-grouting area, and second concrete is poured in the hollow pile processing area. The utility model relates to a pile head structure for grouting after rock-socketed piles, which can solve the problems of high grouting construction difficulty, low construction efficiency and poor construction effect after rock-socketed piles in a karst area.

Description

Pile head structure for post-grouting of rock-socketed pile

Technical Field

The utility model relates to a pile head structure for grouting after rock-socketed pile, belonging to the technical field of building structures.

Background

The rotary digging pile is a pile type constructed by a rotary digging drilling machine and is called a rotary digging drilling bored concrete pile. The rotary drilling rig pore-forming method comprises the steps of firstly, carrying out rotary crushing on rock soil through a barrel type drill bit with a valve at the bottom, directly loading the rock soil into a drilling bucket, then, lifting the drilling bucket out of a hole by a drilling rig lifting device and a telescopic drill rod, and circularly and repeatedly taking and unloading the soil until the drilling reaches the designed depth. The rotary digging cast-in-place pile is mostly adopted in the construction of the pile foundation in the karst area, and the bearing capacity of the pile foundation can be improved through the pile bottom post-grouting process if necessary, so that the economic benefit is greatly improved.

The traditional post-grouting process is to simply keep a grouting pipe at the pile top, perform post-grouting to a grouting node, not effectively protect the grouting pipe, and not make requirements on an empty pile area from the designed pile top to the ground of a construction site. If according to traditional post grouting construction technology, often because cross operation, it is big to lead to the construction degree of difficulty of karst area pile foundation post grouting, and the efficiency of construction is low, and the construction effect is poor: because the slip casting tube head is blocked and cannot be found, the slip casting tube head is mechanically rolled to cause that clear water splitting cannot be timely completed or clear water splitting cannot be completed, so that the slip casting effect is poor, and even slip casting cannot be completed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a pile head structure for grouting after rock-socketed piles in the prior art, which can solve the problems of high grouting construction difficulty, low construction efficiency and poor construction effect after rock-socketed piles in a karst area.

The technical scheme adopted by the utility model for solving the problems is as follows: the utility model provides a slip casting pile head structure behind socketed pile, it includes the stake hole, be provided with the pile body in the stake hole, be the super region of irritating below the pile top of pile body, be empty stake treatment area between the pile top of pile body and the ground, the pile body includes steel reinforcement cage, steel reinforcement cage indulges the muscle including a plurality of stakes that are the annular and arrange, and a plurality of stakes are indulged and are provided with the spiral stirrup on the muscle in the super region of irritating, two slip casting pipes about being provided with on the spiral stirrup, the stake is indulged muscle and slip casting pipe upper end and is all passed empty stake treatment area and extend ground, and a plurality of stakes are indulged the muscle and are provided with a plurality of additional fixed stirrups about empty stake treatment area at the interval, and control two slip casting pipes and be connected with a plurality of additional fixed stirrups, the super region of irritating has pour first concrete, empty stake treatment area has pour the second concrete, the slip casting pipe upper end is provided with the stopcock.

Optionally, the part of the grouting pipe exposed out of the ground is painted with warning paint or wound with a reflective tape.

Optionally, the grouting pipe is exposed to the ground by m or more.

Optionally, the second concrete is low-grade concrete.

Compared with the prior art, the utility model has the advantages that:

1. the pile body grouting pipe of the utility model extends 300mm out of the ground, so that the grouting pipe can be conveniently and rapidly found in the later period, and the clear water thunderbolt can be completed in a specified time, thereby avoiding the condition of excavating the grouting pipe to the soil layer and conveniently verifying whether the grouting pipe is reserved;

2. the pile body pile longitudinal bar extends to the ground and serves as a fixing support for attaching the fixing hoop and serves as a fixing support for the grouting pipe together, so that the stability of the grouting pipe is improved;

3. according to the utility model, the empty pile processing area adopts low-grade concrete pouring to protect grouting after clean water splitting, and a grouting pipe is prevented from being mechanically rolled and deformed and blocked due to the wrapping protection of the low-grade concrete when machinery such as cross construction vehicles and the like in a field runs; the empty pile treatment area is free from collapse and burying a grouting pipe due to the filling of low-grade concrete;

4. the pipe plug aims to avoid the blockage of a grouting pipe, the finished pipe plug for blocking the head of the grouting pipe is low in price and critical in action, and when clean water splitting and post grouting are not carried out, sundries such as concrete slurry and the like can be prevented from entering the pipe to be deeply blocked in a whole process, so that the pipe is ensured not to be blocked, and the influence on the construction quality is huge;

5. the reflective belt aims to avoid the irreversible damage to the grouting pipe caused by the rolling of a worker operating a vehicle and mechanical equipment due to the fact that the worker and the like do not find the grouting pipe in time during construction; the reflective tape has bright color, can emit light at night, can play a good role in prompting construction in the day and at night, and can be additionally provided with warning words to play a better role in prompting due to the flat surface; the reflective tape has low price, is convenient to replace when being stained and can play a role in prompting in the whole process;

6. the bright color finish paint plays a role in strengthening prompt, and can still play a certain role in warning when the reflective tape is stained and cannot be replaced in time.

Drawings

Fig. 1 is a schematic diagram of a structure of a pile head for grouting after a rock-socketed pile according to the utility model.

Fig. 2 is a schematic cross-sectional view of an empty pile area of a post-socketed pile grouting pile head structure according to the utility model.

Wherein:

pile hole 1

Pile body 2

Reinforcement cage 21

Pile longitudinal bar 211

Spiral stirrup 212

Super irrigation zone 3

Empty pile treatment area 4

Grouting pipe 5

Additional fixing stirrup 6

First concrete 7

Second concrete 8

Pipe plug 9

Warning paint 10

A reflective tape 11.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 and 2, the pile head structure for grouting after rock-socketed pile according to the present invention includes a pile hole 1, a pile body 2 is disposed in the pile hole 1, a super-grouting region 3 is disposed below a pile top of the pile body 2, a hollow pile processing region 4 is disposed between the pile top of the pile body 2 and the ground, the pile body 2 includes a reinforcement cage 21, the reinforcement cage 21 includes a plurality of pile longitudinal ribs 211 annularly disposed, a plurality of spiral stirrups 212 are disposed on the plurality of pile longitudinal ribs 211 in the super-grouting region 3, a left grouting pipe 5 and a right grouting pipe 5 are disposed on the spiral stirrups 212, upper ends of the pile longitudinal ribs 211 and the grouting pipes 5 both pass through the hollow pile processing region 4 and extend out of the ground, a plurality of additional fixed stirrups 6 are disposed on the hollow pile processing region 4 at intervals, the left grouting pipe 5 and the right grouting pipe 5 are connected with the additional fixed stirrups 6, a first concrete 7 is poured in the super-grouting region 3, a second concrete 8 is poured in the empty pile processing area 4, and a pipe plug 9 is arranged at the upper end of the grouting pipe 5;

the part of the grouting pipe 5 exposed out of the ground is coated with warning paint 10 or wound with a reflective tape 11;

the grouting pipe 5 is exposed out of the ground by more than 300 mm;

the second concrete 8 is low-grade concrete.

A construction process for a rock-socketed post-grouting pile head structure comprises the following steps:

step one, finishing the processing of a reinforcement cage and a grouting pipe according to requirements, and plugging the end of the grouting pipe by a pipe plug;

step two, pouring concrete after hoisting the reinforcement cage, judging by an empty pile processing area according to a construction period, and selecting to pour the empty pile processing area to the ground once or pour the empty pile area to the ground twice;

thirdly, painting warning paint or winding a reflective tape on the part of the grouting pipe exposed out of the ground;

step four, when the time of the thunderbolt is reached, opening a pipe plug for water splitting, and plugging back the pipe plug after the water splitting technology;

in the cross construction process, the reflecting belt is changed in time by paying attention to the condition that the reflecting belt is stained;

step five, after the specified grouting time node is reached, opening a pipe plug to perform final grouting work;

and step six, after the grouting work is finished, the pipe plug, the reflective belt and the grouting pipe extending out of the ground can be timely disassembled according to actual requirements.

In addition, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a slip casting pile head structure behind embedded rock pile which characterized in that: the pile comprises a pile hole (1), a pile body (2) is arranged in the pile hole (1), a super-grouting area (3) is arranged below the pile top of the pile body (2), an empty pile processing area (4) is arranged between the pile top of the pile body (2) and the ground, the pile body (2) comprises a reinforcement cage (21), the reinforcement cage (21) comprises a plurality of pile longitudinal ribs (211) which are annularly arranged, spiral stirrups (212) are arranged on the plurality of pile longitudinal ribs (211) in the super-grouting area (3), a left grouting pipe and a right grouting pipe (5) are arranged on the spiral stirrups (212), the upper ends of the pile longitudinal ribs (211) and the grouting pipes (5) penetrate through the empty pile processing area (4) and extend out of the ground, a plurality of additional fixed stirrups (6) are arranged on the empty pile processing area (4) at intervals, and the left grouting pipe (5) and the right grouting pipe (5) are connected with the additional fixed stirrups (6), first concrete (7) is poured in the super-irrigation area (3), second concrete (8) is poured in the empty pile processing area (4), and a pipe plug (9) is arranged at the upper end of the grouting pipe (5).

2. The socketed pile post-grouting pile head structure according to claim 1, characterized in that: the part of the grouting pipe (5) exposed out of the ground is coated with warning paint (10) or wound with a reflective tape (11).

3. The socketed pile post-grouting pile head structure according to claim 1, characterized in that: the grouting pipe (5) is exposed out of the ground by more than 300 mm.

4. The socketed pile post-grouting pile head structure according to claim 1, characterized in that: the second concrete (8) adopts low-grade concrete.