Fabricated combinable broken pile treatment device after self-balancing test

Abstract

The utility model belongs to the technical field of geotechnical engineering, and particularly relates to an assembly type combinable broken pile processing device after a self-balancing test, which comprises a plurality of built-in steel bars, a steel bar isolation pipe, a grouting connecting ring, an inner stiffening hoop, slurry and a secondary shunting micro grouting pipe, the upper ends of the plurality of built-in steel bars are welded with a longitudinal bar of a foundation pile steel bar cage, and the lower ends of the plurality of built-in steel bars are welded with the longitudinal bar of the foundation pile steel bar cage; interval cracks are formed in the broken position of the steel bar isolation pipe and sealed through a sealing belt, the steel bar isolation pipe and the inner reinforcement hoop are fixed in a spot welding mode, a grouting hole and a discharging hole are formed in the grouting connecting ring and connected with the main grouting pipe and the main discharging pipe respectively, and the main grouting pipe and the main discharging pipe are connected with the grouting connecting ring. And the grouting connecting ring is bound and fixed with the reinforcement cage through an iron wire. Aiming at the problem that a pile foundation is broken after a self-balancing test, the utility model aims to solve the problems of penetrability and completeness of longitudinal bars of a broken pile reinforcement cage after a large-diameter cast-in-place pile is detected by a self-balancing method, and the broken pile is repaired by a grouting technology, so that the broken pile becomes a complete pile defined by related specifications.

Description

Technical Field

[0001] The utility model belongs to the technical field of geotechnical engineering, and in particular relates to an assembled and combinable broken pile processing device after a self-balancing test. Background Art

[0002] With the continuous development of my country's economic construction, the number of infrastructure construction projects such as urban old house renovation projects, subway projects, highway and railway bridges and offshore projects has increased day by day. The requirements for foundation engineering design for various types of infrastructure construction are getting higher and higher. Pile foundations are widely used in foundation design due to their good bearing capacity and seismic resistance. When using the self-balancing method to detect the bearing capacity of pile foundations, the problem of "broken piles" will be artificially caused after the pile foundation detection. Under the existing technical conditions, underground deep hole grouting technology and its effects are difficult to meet the strength and integrity standards of the pile foundation concrete itself. Although post-grouting of pile foundations can make up for broken piles to a certain extent regardless of cost, the reinforcement effect is very limited. What is more serious is that the steel bars cut off at the load box cannot be connected and compensated by themselves, and the shear resistance requirements for the pile itself cannot be achieved in the structure. Utility Model Content

[0003] The utility model provides an assembled combinable broken pile processing device after self-balancing test, which aims at the problem of "broken pile" in pile foundation, and aims to solve the longitudinal reinforcement penetration and integrity of the steel cage of the broken pile after the self-balancing method detection of large-diameter cast-in-place piles, and repair the broken piles through grouting technology to make them complete piles that meet the definitions of relevant specifications.

[0004] The technical solution adopted by the utility model is as follows:

[0005] The invention discloses an assembled and combinable broken pile processing device after a self-balancing test, comprising an internal steel bar, a steel bar isolation pipe, a grouting connection ring, an internal stiffening hoop, slurry, and a secondary diversion micro-grouting pipe.

[0006] In a preferred embodiment, the internal steel bars include a plurality of steel bars, and the upper ends of the internal steel bars are welded to the longitudinal bars of the pile reinforcement cage.

[0007] In a preferred embodiment, intermittent cracks are provided at the disconnected positions of the steel bar isolation tube, the cracks are sealed with sealing tape, and the steel bar isolation tube is fixed to the inner reinforcement hoop with spot welding.

[0008] In a preferred embodiment, the grouting connection ring is provided with grouting holes and discharge holes, and the grouting hole openings and the discharge hole openings are respectively connected to the main grouting pipe and the main discharge pipe, and the grouting connection ring is fixed to the steel cage by binding with iron wire.

[0009] In a preferred embodiment, the secondary diversion micro-grouting pipe and the steel bar isolation pipe are both connected to the grouting connecting ring via threads.

[0010] In a preferred embodiment, after the pile self-balancing test is completed, grouting is performed using a main grouting pipe, and after the slurry is discharged from the main discharge port, the discharge port is sealed and grouting is continued until the required pressure is reached.

[0011] The technical effects achieved by the utility model are:

[0012] By welding the internal steel bars to the longitudinal bars of the pile reinforcement cage, and separating the internal steel bars from the pile concrete with a steel isolation tube with internal and external threads, it is ensured that the internal steel bars can move upward "freely" before the test. After the test is completed, grouting is performed inside and outside the steel isolation tube. After the grouting is completed, the internal steel bars and the pile body become one, ensuring that the longitudinal bars of the pile reinforcement cage are connected from top to bottom, thereby restoring the "broken pile" to a complete pile, so that the vertical tensile, compressive and shear bearing capacity of the repaired pile is not affected;

[0013] Through the internal reinforcement, the longitudinal reinforcement of the pile foundation reinforcement cage remains continuous and uninterrupted, and its strength grade and cross-sectional area are consistent with the original design. Through post-grouting, the internal reinforcement, the reinforcement isolation tube and the original cross-section of the pile body are integrated, making the foundation pile a complete pile that meets the definition of relevant specifications and meets the standards for the use of engineering piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of an assembled and combinable device for processing broken piles after a self-balancing test according to the utility model;

[0015] Figure 2 The utility model is a schematic diagram of a secondary shunt micro-grouting pipe of an assembled combinable self-balancing test post-broken pile processing device.

[0016] In the figure: 1 internal steel bars, 2 longitudinal bars of pile reinforcement cage, 3 intermittent cracks, 4 reinforcement isolation pipes, 5 grouting holes, 6 grouting connecting rings, 7 discharge holes, 8 sealants, 9 internal stiffening hoops, 10 secondary diversion micro-grouting pipes, 11 slurry. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0018] See also Figure 1-2 The utility model provides an assembled combinable broken pile processing device after a self-balancing test, comprising an internal steel bar 1, a steel bar isolation pipe 4, a grouting connection ring 6, a sealant 8, an internal stiffening hoop 9, a secondary shunt micro grouting pipe 10, and a slurry 11.

[0019] The internal reinforcement 1 comprises a plurality of reinforcement bars, and the upper ends of the internal reinforcement bars 1 are welded to the longitudinal reinforcement bars of the foundation pile reinforcement cage.

[0020] Interval cracks 3 are set at the disconnected position of the steel bar isolation pipe 4 and sealed with a sealing tape. The steel bar isolation pipe 4 is spot welded and fixed to the inner reinforcing hoop.

[0021] The grouting connection ring 6 is provided with a grouting hole 5 and a discharge hole 7, and the grouting hole 5 and the discharge hole 7 are respectively connected to the main grouting pipe and the main discharge pipe. The grouting connection ring 6 is fixed to the pile foundation steel cage by binding with iron wire.

[0022] The secondary shunt micro-grouting pipe 10 and the steel bar isolation pipe are connected to the grouting connection ring 6 by threads. After the pile test is completed, grouting is carried out using the main grouting pipe. After the slurry 11 is discharged from the main discharge port, the discharge port is sealed and grouting is continued until the required pressure is reached. The built-in steel bars 1 are welded to the original longitudinal bars 2 of the steel cage of the pile, and the built-in steel bars are separated from the pile concrete by using a steel bar isolation pipe with internal and external threads to ensure that the steel bars 1 can move "freely" upward before and after the test. After the test is completed, grouting is carried out inside and outside the steel bar isolation pipe. After the grouting is completed, the built-in steel bars 1 become one with the pile body to ensure that the longitudinal bars of the pile foundation steel cage are connected from top to bottom, thereby restoring the "broken pile" to a complete pile, so that the vertical tensile, compressive and shear bearing capacity of the repaired pile are not affected. Through the built-in steel bars 1, the longitudinal bars of the steel cage remain continuous and uninterrupted, and their strength grade and cross-sectional area are consistent with the original design. Through post-grouting, the built-in steel bar 1, the steel bar isolation tube 4 and the original cross section of the pile body are integrated, so that the foundation pile becomes a complete pile that meets the definition of relevant specifications and reaches the standard for the use of engineering piles.

[0023] In the utility model, the internal steel bar 1 is welded to the longitudinal steel bar 2 of the original steel cage of the foundation pile, and the post-placed steel bar 1 is separated from the foundation pile concrete by a protective tube with internal and external threads, so as to ensure that the front and rear steel bars 1 can move upward "freely" before and after the test. After the test is completed, grouting is performed inside and outside the protective tube. After the grouting is completed, the internal steel bar 1 and the pile body become one, so as to ensure that the pile foundation steel bar is connected from top to bottom, thereby restoring the "broken pile" to a complete pile, so that the vertical tensile, compressive and shear bearing capacity of the repaired foundation pile is not affected;

[0024] By using the built-in steel bars 1, the main bars of the steel cage remain continuous and uninterrupted, and their strength grade and cross-sectional area are consistent with the original design. By post-grouting, the built-in steel bars 1, the steel isolation tube 4 and the original cross-section of the pile body are integrated, making the foundation pile a complete pile that meets the definition of relevant specifications and reaches the standard for the use of engineering piles.

[0025] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. An assembled and combinable device for handling broken piles after a self-balancing test, characterized in that: It comprises built-in steel bars (1), longitudinal steel bars of a pile steel cage (2), a steel bar isolation pipe (4), a grouting connection ring (6), an internal stiffening hoop (9), slurry (11), and a secondary diversion micro-grouting pipe (10); There are a plurality of internal steel bars (1), and the upper ends of the internal steel bars (1) are connected to the side surfaces of the longitudinal bars (2) of the pile reinforcement cage by binding welding; Interval cracks (3) are provided at the disconnected positions of the steel bar isolation tube (4), and the cracks are sealed with sealing tape, and the steel bar isolation tube (4) is fixed to the inner reinforcing hoop by spot welding; The grouting connection ring (6) is provided with a grouting hole (5) and a discharge hole (7), and the grouting hole (5) and the discharge hole (7) are respectively connected to the main grouting pipe and the main discharge pipe, and the grouting connection ring (6) is tied and fixed to the steel cage by iron wire; The secondary flow-dividing micro-grouting pipe (10) and the protective pipe are both connected to the grouting connection ring (6) via threads.

2. The assembled and combinable broken pile treatment device after self-balancing test according to claim 1 is characterized by: After the pile self-balancing test is completed, grouting is performed using the main grouting pipe. After the slurry (11) is discharged from the main discharge hole, the discharge hole is sealed and grouting is continued until the required pressure is reached.

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