Single-pile vertical pull-out test auxiliary device
By designing a single pile vertical pull-out test auxiliary device with a combined structure of sleeve and partition, the problems of insufficient steel plate thickness and uneven distribution of steel bars in the prior art are solved, and higher stability and detection strength are achieved.
Patent Information
- Application Number
- CN202422197529.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-09
AI Technical Summary
In the vertical pull-out test of single piles, insufficient thickness of the steel plate leads to poor stability, and uneven distribution of the steel bars leads to a decrease in detection strength.
A single pile vertical pull-out test auxiliary device is designed, using a combined structure of sleeve and partition to form multiple channels for steel bars to pass through, and the force is balanced through the cushion layer to reduce the thickness of the steel plate to reduce the weight.
It improves the stability and service life of the device, reduces the thickness and self-weight of the steel plate, and enhances the detection strength and deformation resistance.
Smart Images
Figure CN222975957U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engineering test devices, in particular to an auxiliary device for single-pile vertical uplift test. Background Technique
[0002] To ensure that the quality of building engineering piles meets the design requirements, the bearing capacity and pile integrity of foundation piles should be detected and evaluated. The bearing capacity detection includes vertical, uplift and horizontal bearing capacity detections, and generally involves the first two detections. The detection purpose of single-pile vertical bearing capacity detection: to determine the bearing capacity value of the pile under the interaction between the pile and the soil. The detection methods include static load detection and high-strain dynamic load detection. The device involved in this device is static load detection, and the specific detection methods and requirements are tested according to the methods and requirements disclosed in the "Technical Code for Building Foundation Pile Testing" JGJ106-2016.
[0003] When using a jack and other devices to pull the steel bars in a precast pile, it is first necessary to fix the steel bars on a structure that can be linked with the jack to bear force. Most of the existing technologies are to open holes in the steel plate, and then use welding or bolt connection to fix the steel bars after passing through the steel plate, and then use a jack to jack up the steel plate, and then detect by detecting the working conditions of the jack. The stability of this method is poor. First, after the steel bar passes through the opening, due to the thin thickness of the steel plate, it is easy to cause the steel plate to collapse at the opening, and the steel plate needs to be replaced after using for a period of time. If the thickness of the steel plate is increased, the requirements for transportation and handling are greatly increased. Secondly, most of the middle parts of precast pipe piles are concrete, and most of the steel bars are on the outer part of the pipe pile. If holes are opened in the middle of the steel plate in the existing technology, it is easy to reduce the strength of the steel plate at the position where it contacts the jack. Content of the Utility Model
[0004] The purpose of the utility model is to provide an auxiliary device for single-pile vertical uplift test.
[0005] To achieve the above object, an embodiment of the utility model provides an auxiliary device for single-pile vertical uplift test, including: a cushion block and a support beam installed on the cushion block, a jack is installed on the support beam, and a connecting device is installed on the jack;
[0006] The connecting device includes an outer frame, a sleeve is arranged inside the outer frame, the sleeve has an inner ring and an outer ring, the inner side of the inner ring is hollow, and there is a partition between the inner ring and the outer ring to divide the circular space into several channels. The steel bars of the precast pile pass through the channels and reach above the sleeve for fixing with an anchor, and a cushion layer is arranged between the anchor and the sleeve.
[0007] Preferably, the utility model has two cushion blocks, two support beams are arranged on the two cushion blocks, at least 2 jacks are fixed on the support beams, and all the jacks jointly lift the connecting device.
[0008] Preferably, a reinforcing steel plate is provided at the bottom of the outer frame, and the position of the reinforcing steel plate corresponds to the contact position of the jack. A lifting plate and a detachable support foot are provided on the side wall of the outer frame.
[0009] Preferably, 10 to 30 channels are evenly distributed between the inner ring and the outer ring.
[0010] In summary, the present utility model has the following advantages:
[0011] A sleeve is arranged inside the outer frame of the device. The sleeve has a certain height. After forming channels through the partition plates, it is not only convenient for the steel bars to pass through, but also the contact force between the sleeve and the anchor can be balanced through the action of the cushion layer. Even if the cushion layer is damaged, it can be freely replaced without damaging the connection device itself, making the service life of the auxiliary device longer. At the same time, the height of the sleeve of the device is increased, and the force is distributed by multiple partition plates, so that the thickness of the steel plate can be reduced under the same height, and the self-weight can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a schematic diagram of an auxiliary device for a single-pile vertical uplift test in an embodiment of the present utility model;
[0013] Figure 2 is a top view of a connection device in an embodiment of the present utility model;
[0014] Figure 3 is a schematic diagram of a connection device in an embodiment of the present utility model, in which the support feet are omitted.
[0015] Wherein, 1, cushion block; 2, support beam; 3, jack; 4, outer frame; 5, sleeve; 6, inner ring; 7, outer ring; 8, partition plate; 9, channel; 10, steel bar; 11, cushion layer; 12, anchor; 13, reinforcing steel plate; 14, lifting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] The present utility model provides an auxiliary device for a single-pile vertical uplift test, including a cushion block 1 and a support beam 2 installed on the cushion block 1. A jack 3 is installed on the support beam 2, and a connection device is installed on the jack 3. Prefabricated piles are generally above the ground, and the steel bars 10 on the prefabricated piles are generally at a certain height from the ground. In order to install the jack to a suitable height, a cushion block 1 needs to be provided. The cushion block 1 can provide a certain height and is also convenient for installing the support beam 2, so that the support beam 2 is relatively stable after installation and will not have a large difference due to the hardness of the ground. Preferably, two cushion blocks 1 are provided, two support beams 2 are provided on the two cushion blocks 1, and at least 2 jacks 3 are fixed on the support beam 2, and all the jacks jointly lift the connection device.
[0017] The utility model optimizes the connecting device in the prior art and uses a new connecting device. The connecting device of the utility model includes an outer frame 4. A sleeve 5 is arranged inside the outer frame 4. The sleeve has an inner ring 6 and an outer ring 7. The inner side of the inner ring is hollow. There is a partition 8 between the inner ring and the outer ring to divide the annular space into several channels 9. Preferably, there are 10 to 30 channels evenly distributed between the inner ring and the outer ring.
[0018] A reinforcing steel plate 13 is arranged at the bottom of the outer frame 4 of the utility model. The position of the reinforcing steel plate corresponds to the contact position of the jack, that is, the jack applies force in contact with the reinforcing steel plate of the outer frame, and the strength of the part of the outer frame where the force is applied is higher, making the anti-deformation ability of the outer frame better. A lifting plate 14 and a detachable support foot are arranged on the side wall of the outer frame, which is convenient for using a lifting device to hoist the auxiliary device during use. The support foot can be a connecting pipe arranged on the side, a tubular vertical rod is installed inside the connecting pipe, a foot pad is arranged at the bottom of the vertical rod, and a bolt is arranged on the connecting pipe. When the bolt abuts against the vertical rod, it is fixed.
[0019] The steel bars of the precast pile pass through the channels and reach above the sleeve and are fixed using an anchor. A cushion layer 11 is arranged between the anchor 12 and the sleeve 5. The sleeve 5 has a certain height. During use, the cushion blocks are arranged around the precast pile, and then the support beam is placed. After the jack is fixed on the support beam, the connecting device is lifted and placed on the jack. During the placement process, the steel bars of the precast pile pass through the channels. When the connecting device is installed, the cushion layer is placed above the channels, and then the anchor is placed on the cushion layer, and the steel bars are clamped using the anchor. When conducting the test, the jack is jacked up, and at this time, the anti-pulling test can be carried out after the anchor clamps the steel bars.
Claims
1. A single pile vertical pull-out test auxiliary device, characterized in that: include: A cushion block and a support beam mounted on the cushion block, a jack mounted on the support beam, and a connecting device mounted on the jack; The connecting device includes an outer frame, a sleeve is arranged inside the outer frame, the sleeve has an inner ring and an outer ring, the inner side of the inner ring is hollow, a partition is arranged between the inner ring and the outer ring to divide the circular space into a plurality of channels, the steel bars of the precast pile pass through the channels to reach the top of the sleeve and are fixed using an anchor, and a cushion layer is arranged between the anchor and the sleeve.
2. The single pile vertical pull-out test auxiliary device according to claim 1, characterized in that: The cushion blocks are provided with two, and two supporting beams are provided on the two cushion blocks. At least two jacks are fixed on the supporting beams, and all the jacks lift up the connecting device together.
3. The single pile vertical pull-out test auxiliary device according to claim 1, characterized in that: A reinforcing steel plate is arranged at the bottom of the outer frame, the position of the reinforcing steel plate corresponds to the contact position of the jack, and a hoisting plate and a detachable supporting foot are arranged on the side wall of the outer frame.
4. The single pile vertical pull-out test auxiliary device according to claim 1, characterized in that: There are 10 to 30 channels evenly distributed between the inner ring and the outer ring.