Creep-controllable stress release air bag for stress release hole and construction method of creep-controllable stress release air bag

Abstract

The invention discloses a creep-controllable stress release air bag for a stress release hole and a construction method thereof, the creep-controllable stress release air bag comprises an air bag body, the air bag body is cylindrical, and the air bag body is provided with an electric air inlet valve and an electric pressure release valve; the counterweight head is mounted at the lower end of the air bag body; the pressure sensor is used for collecting real-time pressure in the air bag body and is mounted on the air bag body; the controller is in signal connection with the pressure sensor, the electric air inlet valve and the electric pressure release valve, and the controller effectively controls the displacement speed of the soil body by controlling the electric air inlet valve and / or the electric pressure release valve based on a preset pressure threshold value range and the real-time pressure. And the stress generated by soil body movement caused by pile foundation construction is slowly released. According to the invention, the problem of weak lateral pressure resistance of a conventional stress release in-hole support scheme is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a creep controllable stress release air bag for stress release hole and a construction method thereof. BACKGROUND

[0002] In pipe pile engineering, stress release hole is a construction measure to reduce the stress of pile body. When the pipe pile is subjected to the usual design load, it will be subjected to a certain stress. In order to make the bearing capacity more stable and reliable, the construction personnel will excavate stress release holes on the body of the pipe pile to enable the stress to be released, thereby reducing the adverse effects of the stress on the pipe pile.

[0003] In order to prevent the stress release hole from collapsing during pipe pile construction, a steel reinforced bamboo cage is generally placed in the hole. The cage body is made of a steel cage skeleton and a plurality of 3cm wide bamboo pieces. After the drilling and hole forming are completed, the bamboo cage is installed. In order to prevent the bamboo cage from floating up, stones of corresponding weight are bound to the bottom of the bamboo cage. During the process, the water level in the hole is observed, and if necessary, dewatering measures are taken. The drilling construction is performed by jumping and hitting, and the interval between two holes is more than 24 hours.

[0004] The conventional stress release hole inner support scheme has the following problems: 1. Bamboo cage inner support, small bearing capacity, weak lateral pressure resistance; 2. Steel cage inner support, material waste, weak lateral pressure resistance. SUMMARY

[0005] In order to overcome the defects of the prior art, a creep controllable stress release air bag for stress release hole and a construction method thereof are provided to solve the problem of weak lateral pressure resistance of the conventional stress release hole inner support scheme.

[0006] To achieve the above-mentioned purpose, a creep controllable stress release air bag for stress release hole is provided, comprising: An air bag body, the air bag body is in a cylindrical shape, the air bag body is provided with an electric air inlet valve and an electric pressure relief valve; A counterweight head installed at the lower end of the air bag body; A pressure sensor for collecting the real-time pressure inside the air bag body, installed on the air bag body; A controller signal connected to the pressure sensor, the electric air inlet valve and the electric pressure relief valve, based on the preset pressure threshold range and the real-time pressure, the controller controls the electric air inlet valve and / or the electric pressure relief valve to effectively control the soil displacement speed, and slowly releases the stress caused by the soil movement during pile foundation construction.

[0007] Further, the upper end of the air bag body is provided with a lifting ring.

[0008] Further, the number of the lifting pull rings is two, and the two lifting pull rings are arranged on opposite sides of the air bag body.

[0009] Further, the electric air inlet valve is connected with an air compressor through a pipeline.

[0010] Further, the air bag body is provided with anti-pulling convex ridges on the side surface.

[0011] Further, the anti-pulling convex ridges are arranged in a circle along the circumferential direction of the air bag body.

[0012] Further, the counterweight head is in the shape of an inverted cone.

[0013] The application provides a construction method of a creep-controllable stress release air bag for a stress release hole, comprising the following steps: The controller controls the electric air inlet valve to make the air bag body expand; The expanded air bag body is lowered into the stress release hole; The controller continues to control the electric air inlet valve, so that the circumferential side surface of the air bag body is supported on the hole wall of the stress release hole; The pressure sensor collects the real-time pressure inside the air bag body; The controller controls the electric air inlet valve and / or the electric pressure relief valve based on the preset pressure threshold range and the real-time pressure to effectively control the soil displacement speed, and slowly releases the stress generated by the soil movement caused by the pile foundation construction.

[0014] The application has the beneficial effects that the creep-controllable stress release air bag for a stress release hole can monitor the underground soil extrusion flow in real time, provide reliable support force for the hole wall of the stress release hole, has strong lateral pressure resistance, can effectively control the soil displacement speed, thereby slowly releasing the stress generated by the soil movement caused by the pile foundation construction, protects the completed pile foundation and surrounding construction engineering, can be recycled and used multiple times, ensures the engineering safety and construction quality to a greater extent, and is relatively green and environmentally friendly. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the accompanying drawings: Figure 1 The structure diagram of the creep-controllable stress release air bag for a stress release hole according to the embodiment of the application.

[0016] Figure 2 The top view of the creep-controllable stress release air bag for a stress release hole according to the embodiment of the application.

[0017] Reference signs: The air bag body 1, the electric air inlet valve 11, the electric pressure relief valve 12, the lifting handle 13, and the anti-pulling convex ridge 14; The counterweight head 2; The pressure sensor 3. DETAILED DESCRIPTION

[0018] The application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended for the purpose of interpretation of the application and are not limiting of the application. In addition, it should be noted that only parts related to the application are shown in the drawings for ease of description.

[0019] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0020] Referring to Figure 1 and Figure 2 The present application provides a creep-controllable stress release air bag for a stress release hole, comprising: an air bag body 1, a counterweight head 2, a pressure sensor 3, and a controller.

[0021] The air bag body 1 is arranged in the stress release hole. The air bag body 1 is in a cylindrical shape. Preferably, the air bag body is arranged vertically in the stress release hole. The air bag body 1 is installed with an electric air inlet valve 11 and an electric pressure relief valve 12.

[0022] Opening the electric air inlet valve 11 will fill the medium into the air bag body. Opening the electric pressure relief valve 12 will discharge the medium from the air bag body. Through the linkage of the electric air inlet valve 11 and the electric pressure relief valve 12, the pressure in the air bag body can be regulated.

[0023] The counterweight head 2 is installed at the lower end of the air bag body 1.

[0024] The pressure sensor 3 is installed on the air bag body 1. The pressure sensor 3 is used to collect the real-time pressure inside the air bag body 1.

[0025] The controller is signal-connected to the pressure sensor 3, the electric air inlet valve 11, and the electric pressure relief valve 12.

[0026] Based on the preset pressure threshold range and the real-time pressure, the controller controls the electric air inlet valve 11 and / or the electric pressure relief valve 12 to effectively control the soil displacement speed and slowly release the stress caused by the soil movement during pile foundation construction.

[0027] In the present embodiment, the upper end of the air bag body 1 is provided with a lifting handle 13. After the creep-controllable stress release air bag for a stress release hole of the present application is used, it is lifted out of the stress release hole by a lifting machine for circulation.

[0028] In a preferred embodiment, two lifting rings 13 are provided. The two lifting rings 13 are located on opposite sides of the airbag body 1.

[0029] In this embodiment, the lifting ring is disposed on the upper end surface of the airbag body.

[0030] In a preferred embodiment, the medium inflated into the airbag body is water or air. In this embodiment, the medium inflated into the airbag body is air. The electric air intake valve 11 is connected to an air compressor via a pipeline. When it is necessary to inflate the airbag body with a medium, the controller opens the air compressor and the electric air intake valve, allowing high-pressure air to inflate the airbag body, thereby causing the airbag body to expand.

[0031] See Figure 1 and Figure 2 As shown, the airbag body 1 has a pull-out rib 14 formed on its side. After the airbag body is placed in the stress relief hole, the airbag body is filled with a medium and expands to press against the hole wall of the stress relief hole. The pull-out rib presses against the hole wall of the stress relief hole to provide pull-out resistance to the airbag body. This ensures that the airbag body is stably positioned in the designed position and supports the hole wall of the stress relief hole.

[0032] In a preferred embodiment, the anti-pull-out rib 14 is arranged in a circle along the circumference of the airbag body 1. The cross-section of the anti-pull-out rib is semi-circular.

[0033] In this embodiment, the counterweight head 2 is in the shape of an inverted cone. The larger end of the counterweight head is coaxially connected to the lower end face of the airbag body.

[0034] This invention provides a construction method for a creep-controlled stress relief airbag for stress relief holes, comprising the following steps: S1. The controller controls the electric air intake valve 11 to inflate the airbag body 1.

[0035] S2. Lower the inflated airbag body 1 into the stress relief hole.

[0036] S3. The controller continues to control the electric air intake valve 11, so that the circumferential side of the airbag body 1 is supported by the wall of the stress relief hole.

[0037] S4. Pressure sensor 3 collects the real-time pressure inside the airbag body 1.

[0038] S5. Based on the preset pressure threshold range and real-time pressure, the controller controls the electric air intake valve 11 and / or the electric pressure relief valve 12 to effectively control the soil displacement speed and slowly release the stress caused by soil movement during pile foundation construction.

[0039] Specifically, the magnitude of the lateral pressure on the soil is reflected by the real-time pressure inside the airbag, thereby monitoring the lateral pressure on the soil. The controller adjusts the pressure value inside the airbag via an electric intake valve and an electric pressure relief valve, based on a preset pressure threshold range. This effectively controls the soil displacement velocity, thus slowly releasing the stress generated by soil movement during pile foundation construction.

[0040] The creep-controlled stress relief airbag for stress relief holes of the present invention is mainly used in highly fluid strata to monitor and release the lateral pressure of the soil in a timely manner.

[0041] The creep-controlled stress relief airbag for stress relief holes of the present invention uses a high-strength outer wall material, which is pressure-resistant, wear-resistant, and puncture-resistant. Specifically, the airbag body is made of high-strength synthetic rubber and has an embedded reinforcing fiber layer.

[0042] When the medium for the creep-controlled stress relief airbag for stress relief holes in this invention is water, a pressure relief pipe bottom-through type device should be used.

[0043] The creep-controlled stress relief airbag controller for stress relief holes of the present invention accurately calculates lateral earth pressure and prevents excessive earth pressure from causing soil heave.

[0044] The creep-controlled stress relief airbag for stress relief holes of the present invention can monitor the compression and flow of underground soil in real time, effectively control the soil displacement speed, and thus slowly release the stress generated by soil movement caused by pile foundation construction, protect the completed pile foundation and surrounding building projects, and can be recycled and reused multiple times, thus ensuring project safety and construction quality to a greater extent, and is relatively green and environmentally friendly overall.

[0045] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A creep-controlled stress relief airbag for stress relief holes, characterized in that, include: The airbag body is cylindrical and is equipped with an electric air intake valve and an electric pressure relief valve. A counterweight head is installed at the lower end of the airbag body; A pressure sensor for collecting real-time pressure inside the airbag body is installed on the airbag body; The controller is connected to the pressure sensor, the electric air intake valve, and the electric pressure relief valve. Based on a preset pressure threshold range and the real-time pressure, the controller controls the electric air intake valve and / or the electric pressure relief valve to effectively control the soil displacement velocity and slowly release the stress caused by soil movement during pile foundation construction.

2. The creep-controlled stress relief airbag for stress relief holes according to claim 1, characterized in that, The upper end of the airbag body is equipped with a lifting ring.

3. The creep-controlled stress relief airbag for stress relief holes according to claim 2, characterized in that, The number of lifting rings is two, and the two lifting rings are located on opposite sides of the airbag body.

4. The creep-controlled stress relief airbag for stress relief holes according to claim 1, characterized in that, The electric intake valve is connected to an air compressor via a pipeline.

5. The creep-controlled stress relief airbag for stress relief holes according to claim 1, characterized in that, The airbag body has anti-pull-out ridges formed on its side.

6. The creep-controlled stress relief airbag for stress relief holes according to claim 5, characterized in that, The anti-pull-out ribs are arranged in a circle along the circumference of the airbag body.

7. The creep-controlled stress relief airbag for stress relief holes according to claim 1, characterized in that, The counterweight head is in the shape of an inverted cone.

8. A construction method for a creep-controlled stress relief airbag for stress relief holes as described in any one of claims 1 to 7, characterized in that, Includes the following steps: The controller controls the electric air intake valve to inflate the airbag body; The inflated airbag body is lowered into the stress relief hole; The controller continues to control the electric air intake valve, so that the circumferential side of the airbag body is supported by the wall of the stress relief hole; The pressure sensor collects the real-time pressure inside the airbag body; The controller, based on a preset pressure threshold range and the real-time pressure, controls the electric air intake valve and / or the electric pressure relief valve to effectively control the soil displacement velocity and slowly release the stress generated by soil movement caused by pile foundation construction.

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