CN214272166U

CN214272166U - Device for detecting sediment thickness of large-diameter deep and long foundation pile and reinforcing through post-grouting

Info

Publication number: CN214272166U
Application number: CN202120085257.7U
Authority: CN
Inventors: 张剑; 吕建仁; 匡静; 李应文
Original assignee: Gansu Academy Of Building Science Co ltd
Current assignee: Gansu Academy Of Building Sciences Group Co ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-09-24
Anticipated expiration: 2031-01-13

Abstract

The utility model belongs to the technical field of the engineering construction, a device for detecting deep long foundation pile sediment thickness of major diameter and back slip casting reinforcement is disclosed, detect the major diameter with solving prior art, the problem that exists during the sediment thickness of overlength concrete bored concrete pile, the device is including installing the double-deck pipe of loosing core in pile body steel reinforcement cage, and pile body steel reinforcement cage and double-deck pipe of loosing core are all installed in the drilling, the top and the pile body steel reinforcement cage parallel and level of double-deck pipe of loosing core, the bottom of double-deck pipe of loosing core is not less than 0.5 meters apart from the bottom of drilling, the double-deck pipe of loosing core includes outer PVC pipe and installs the intraductal recoverable hollow steel pipe of outer PVC with one heart, and the bottom of outer PVC pipe is sealed, concrete layer has all been pour between the outer wall of outer PVC pipe and the inner wall of drilling. The utility model discloses a pipe of loosing core, the detection and the control of effective supplementary stake end sediment thickness, the recoverable back reuse of the recoverable hollow steel pipe of pipe is loosed core to the multiple layer is favorable to controlling engineering investment cost, increases material cyclic utilization rate.

Description

Device for detecting sediment thickness of large-diameter deep and long foundation pile and reinforcing through post-grouting

Technical Field

The utility model relates to an engineering and construction technical field, concretely relates to bore device that core detected sediment thickness and back slip casting reinforcement.

Background

With the development and demand of economic construction, the current building (structure) is continuously developed towards the direction of height, size and difficulty, which puts higher requirements on the foundation engineering of the building (structure) and generates more and more large-diameter deep and long pile foundations. For a long time, the detection of the engineering pile sediment thickness is a difficult problem which puzzles the engineering world, especially for the sediment thickness of a large-diameter and ultra-long concrete cast-in-place pile, although the pile end pouring quality can be detected to a certain extent by the sound wave transmission method, the sound wave transmission method needs to embed a sound detection pipe in the sediment and ensures that the sediment is penetrated, the human factor is large during construction, and the accuracy of 100% cannot be ensured. The prior art cannot solve the technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that exists when prior art detects the sediment thickness of major diameter, overlength cast-in-place concrete pile, provide a device that is used for detecting the deep long foundation pile sediment thickness of major diameter and back slip casting reinforcement.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a device for detecting deep long foundation pile sediment thickness of major diameter and back slip casting reinforcement, loose core the pipe including installing the multiple layer in pile body steel reinforcement cage, and pile body steel reinforcement cage and multiple layer are loosed core the pipe and are all installed in the drilling, the top and the pile body steel reinforcement cage parallel and level of pipe are loosed core to the multiple layer, the multiple layer is loosed core the pipe and is included outer PVC pipe and install the intraductal recoverable hollow steel pipe of outer PVC with one heart, and the bottom of outer PVC pipe seals, concrete layer has all been pour between the outer wall of outer PVC pipe and the inner wall of drilling.

Furthermore, the outer layer PVC pipe is formed by connecting a plurality of sections of PVC pipes through buckles.

Furthermore, the recyclable hollow steel pipe is formed by connecting a plurality of sections of steel pipes through threads.

Further, the inner wall of the outer layer PVC pipe is filled with a lubricating agent layer.

Further, the pile body reinforcement cage comprises a spiral hoop and a plurality of main reinforcements welded in the spiral hoop.

Further, the thickness of the outer layer PVC pipe is not less than 4 mm.

Further, the thickness of the recyclable hollow steel pipe is not less than 4 mm.

Furthermore, the outer wall of the outer PVC pipe is provided with throat hoops at intervals, and the throat hoops and the spiral hoops are fastened through reinforcing steel bars.

Further, the distance between the bottom of the multilayer core-pulling guide pipe and the bottom of the drill hole is not less than 0.5 m.

Compared with the prior art, the utility model, following beneficial effect has:

the utility model discloses a device whole device for detecting deep long foundation pile sediment thickness of major diameter and back slip casting reinforcement is pre-buried simultaneously with pile body steel reinforcement cage, takes recoverable hollow steel pipe out after pile body concrete placement, forms the diameter and far exceeds the pipe of loosing core that bores the core and detect used drill bit diameter, and the pipe is inside for empty, has reduced greatly along this pipe when boring and get pile end concrete core appearance and has bored the core distance, energy-conserving material saving, raise the efficiency. Meanwhile, the pile body is quickly reinforced as a post-grouting reinforcement channel under the condition that pile end sediment needs to be treated or reinforcement is needed, the purpose of quickly detecting and reinforcing the quality of the pile body is achieved by the aid of the same device, the accuracy and convenience of detection and reinforcement construction are improved, the advantages of ensuring engineering quality and saving materials and construction period are achieved, and the method has good economic and environmental benefits and high engineering popularization and application values. The utility model discloses a pipe of loosing core, the detection and the control of effective supplementary stake end sediment thickness when guaranteeing foundation pile bearing capacity, further realize the purpose that the control building subsides. The recyclable hollow steel pipe of the double-layer core-pulling guide pipe can be recycled, so that the engineering investment cost can be controlled, and the material recycling rate can be increased.

Drawings

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

Fig. 2 is a schematic view of the multi-layer core-pulling catheter of the present invention.

Fig. 3 is a cross-sectional view of a-a of fig. 1 according to the present invention.

The reference numerals have the following meanings: 1. a multi-layer core-pulling conduit; 2. an outer layer of PVC pipe; 3. the hollow steel pipe can be recycled; 4. a main rib; 5. a spiral hoop; 6. a concrete layer; 7. drilling; 8. a hose clamp.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 1-3, a device for detecting the sediment thickness of a large-diameter deep and long foundation pile and reinforcing by post-grouting comprises a multi-layer core-pulling guide pipe 1 installed in a pile body steel reinforcement cage, wherein the pile body steel reinforcement cage and the multi-layer core-pulling guide pipe 1 are both installed in a drill hole 7, and the pile body steel reinforcement cage comprises a spiral hoop 5 and a plurality of main ribs 4 welded in the spiral hoop 5. The top of the double-layer core-pulling guide pipe 1 is flush with a pile body reinforcement cage, the distance between the bottom of the double-layer core-pulling guide pipe 1 and the bottom of the drill hole 7 is not less than 0.5m, the double-layer core-pulling guide pipe 1 comprises an outer-layer PVC pipe 2 and a recyclable hollow steel pipe 3 concentrically installed in the outer-layer PVC pipe 2, the thickness of the recyclable hollow steel pipe 3 is not less than 4mm, and the recyclable hollow steel pipe 3 is formed by connecting a plurality of sections of steel pipes through threads. The outer wall of outer layer PVC pipe 2 is gone up the interval and is set up larynx hoop 8, and larynx hoop 8 passes through the reinforcing bar fastening with spiral hoop 5.

The bottom of outer PVC pipe 2 is sealed, and concrete layer 6 has all been pour between the outer wall of outer PVC pipe 2 and the inner wall of drilling 7. Outer layer PVC pipe 2 is formed by the buckle connection of multisection PVC pipe, and outer layer PVC pipe 2's thickness is not less than 4mm, and the inner wall of outer layer PVC pipe 2 is filled and is scribbled lubricated reagent layer.

The method comprises the following specific steps:

the outside of the double-layer core-pulling conduit, namely the outer PVC pipe 2, is provided with throat hoops every 2m, and binding steel bars are connected with the inner wall of the spiral reinforcing rib of the steel reinforcement cage under the throat hoops, so that the verticality of the conduit body is ensured in the connection process, the upper opening of the finished conduit is flush with the upper opening of the steel reinforcement cage of the pile body, and the lower opening is closed and is not less than 0.5m away from the bottom of the pile.

After foundation pile pore-forming, hoist and put aforementioned steel reinforcement cage of installing double-deck guide tube of loosing core 1, transfer the process and need at the uniform velocity slowly, avoid the steel reinforcement cage to produce the lateral oscillations and cause the pore wall to collapse. If the steel reinforcement cage is completed by adopting a process of hoisting and welding, the double-layer core-pulling guide pipe 1 is also hoisted and connected with the steel reinforcement cage synchronously and sectionally, and the verticality of the steel reinforcement cage and the guide pipe needs to be ensured in the connection process respectively.

And (4) pouring concrete into the foundation pile after hoisting is finished, wherein the concrete guide pipe is not contacted with the composite core-pulling guide pipe 1 in the pouring process, and no concrete is required in the composite core-pulling guide pipe 1 after pouring is finished.

After the foundation pile concrete is finally condensed, the outer layer PVC pipe 2 of the double-layer core-pulling catheter 1 is kept as a core-pulling channel, and the recyclable hollow steel pipe 3 is connected by a thread external thread lifting tool matched with a thread of the recyclable hollow steel pipe and then is hoisted and pulled out in sections for recycling for secondary use.

The core sample with the length not less than 2.0m from the pile end section to the position below the bearing layer is drilled through the core-pulling channel, the drill bit extends into the core-pulling guide pipe to the pile bottom, the core sample at the pile end section is drilled from the lower opening of the guide pipe to detect the sediment thickness and the concrete pouring quality, and due to the guiding effect of the core-pulling guide pipe, the core sample needing to be drilled is short in length and accurate in position, so that the phenomenon of deviation of long-distance core drilling is avoided, the core drilling efficiency is improved, and the core drilling material, time and cost are saved.

And if the core sample shows that the thickness of the sediment at the pile end and the quality of the concrete are qualified, the core drilling hole and the core pulling channel are plugged by the poured cement paste.

If the core sample shows that the thickness of the sediment at the pile end is too large or the concrete pouring quality is poor, the guide pipe and the drilled core hole are used as a post-grouting guide pipe, and a high-pressure grouting pipe is arranged to perform post-grouting reinforcement on the pile end. The concrete method is that low-pressure grouting M35 cement mortar with the pressure of 0.2-0.5 MPa is adopted until the grouting is full, secondary pressure grouting is carried out after the low-pressure grouting is finished for 24 hours, the grouting material is pure cement slurry, the water cement ratio is 0.5-0.6, the grouting pressure is 1.0 MPa, and the channel is sealed and filled by clean slurry after the grouting reinforcement is finished.

Claims

1. The utility model provides a device for detecting heavy diameter deep and long foundation pile sediment thickness and back slip casting reinforcement, characterized by: including installing double-deck pipe (1) of loosing core in pile body steel reinforcement cage, and pile body steel reinforcement cage and double-deck pipe (1) of loosing core are all installed in drilling (7), the top and the pile body steel reinforcement cage parallel and level of double-deck pipe (1) of loosing core, double-deck pipe (1) of loosing core includes outer PVC pipe (2) and installs recoverable hollow steel pipe (3) in outer PVC pipe (2) with one heart, and the bottom of outer PVC pipe (2) seals, concrete layer (6) have all been pour between the outer wall of outer PVC pipe (2) and the inner wall of drilling (7).

2. The device for detecting the sediment thickness and post-grouting reinforcement of the large-diameter deep and long foundation pile according to claim 1, which is characterized in that: the outer layer PVC pipe (2) is formed by connecting a plurality of sections of PVC pipes through buckles.

3. The device for detecting the sediment thickness and post-grouting reinforcement of the large-diameter deep and long foundation pile according to claim 2, wherein the device comprises: the recyclable hollow steel pipe (3) is formed by connecting a plurality of sections of steel pipes through threads.

4. The device for detecting the sediment thickness and post-grouting reinforcement of the large-diameter deep and long foundation pile according to claim 1 or 3, which is characterized in that: and the inner wall of the outer layer PVC pipe (2) is filled with a lubricating reagent layer.

5. The device for detecting the sediment thickness and post-grouting reinforcement of the large-diameter deep and long foundation pile according to claim 1 or 3, which is characterized in that: the pile body reinforcement cage comprises a spiral hoop (5) and a plurality of main reinforcements (4) welded in the spiral hoop (5).

6. The device for detecting the sediment thickness and post-grouting reinforcement of the large-diameter deep and long foundation pile according to claim 1, which is characterized in that: the thickness of the outer layer PVC pipe (2) is not less than 4 mm.

7. The device for detecting the sediment thickness and post-grouting reinforcement of the large-diameter deep and long foundation pile according to claim 1, which is characterized in that: the thickness of the recyclable hollow steel pipe (3) is not less than 4 mm.

8. The device for detecting the sediment thickness and post-grouting reinforcement of the large-diameter deep and long foundation pile according to claim 5, wherein the device comprises: the outer wall of the outer PVC pipe (2) is provided with throat hoops (8) at intervals, and the throat hoops (8) and the spiral hoops (5) are fastened through reinforcing steel bars.

9. The device for detecting the sediment thickness and post-grouting reinforcement of the large-diameter deep and long foundation pile according to claim 1, which is characterized in that: the distance between the bottom of the multilayer core-pulling guide pipe (1) and the bottom of the drill hole (7) is not less than 0.5 m.