CN-117286914-B - Pile soil pressure testing device and method for indoor side slope model test

CN117286914BCN 117286914 BCN117286914 BCN 117286914BCN-117286914-B

Abstract

The invention relates to a pile soil pressure testing device and a testing method for an indoor side slope model test, wherein the device comprises a plurality of circular pile moulds and a plurality of soil pressure box forming systems, each soil pressure box forming system comprises a connecting rod and a soil pressure box forming block, two sides of each soil pressure box forming block are respectively connected with one end of one connecting rod, the other end of each connecting rod is detachably connected with a pile section connecting member, through holes are formed in the circular pile moulds, and each soil pressure box forming block is arranged in each circular pile mould through each through hole. The pile body mold and the soil pressure box forming system are designed in a split mode, so that the device has extremely high practicability, the soil pressure box forming system can be flexibly arranged, the number and the positions can be determined according to test requirements, the device has good universality, and main structural materials can be reused, so that the environment friendliness is met.

Inventors

SHU ZHONGWEN
YU GUI
ZHANG LIANWEI
LI TINGSHAN
BAI GUOHUA
LI LI
LI MIN
SU YOUCAI
DAI CHAO
LI XING
ZHOU CHUNLEI
WU KUN
LIU XIN
ZHU BAOLONG
CUI SHUAI

Assignees

中铁科学研究院有限公司
中建三局集团西南有限公司

Dates

Publication Date: 20260505
Application Date: 20230914

Claims (8)

1. The pile soil pressure testing device for the indoor side slope model test comprises a plurality of round pile dies (3) and a plurality of soil pressure box forming systems (1), wherein two adjacent round pile dies (3) are connected through pile section connecting members (2), and the pile soil pressure testing device is characterized in that each round pile die (3) comprises a connecting rod (1.1) and a soil pressure box forming block (1.5), two sides of each soil pressure box forming block (1.5) are respectively connected with one end of one connecting rod (1.1), the other end of each connecting rod (1.1) is detachably connected with the outer wall of each round pile die (3) or the other connecting rod (1.1), through holes are formed in the round pile dies (3), and the soil pressure box forming blocks (1.5) are arranged in the round pile dies (3) through the through holes; The circular pile mould (3) consists of two mould half bodies (3.1) with the same structural shape, the through hole is formed between the two mould half bodies (3.1), the soil pressure box forming system (1) is bridged between the two mould half bodies (3.1) to connect the two mould half bodies (3.1) into a whole, and the pile section connecting members (2) are arranged on the two mould half bodies (3.1); The soil pressure box forming system (1) further comprises an operating handle (1.2), a central transition block (1.3) and sliding blocks (1.4), the middle part of the operating handle (1.2) is connected with two connecting rods (1.1), the inner end of the operating handle (1.2) is fixedly connected with the soil pressure box forming block (1.5) through the central transition block (1.3), the sliding blocks (1.4) are arranged on two sides of the central transition block (1.3), soil pressure box guide rails (6) are respectively arranged on two mold half bodies (3.1) on two sides of the through hole, the sliding blocks (1.4) on two sides of the central transition block (1.3) are limited in the soil pressure box guide rails (6) corresponding to the two sides in a sliding mode, and pile seals (4) are arranged above the central transition block (1.3) and in the soil pressure box guide rails (6) below in an inserted mode.
2. The pile soil pressure testing device for indoor side slope model test according to claim 1, wherein the through holes extend to the upper and lower ends of the mold half body (3.1), and correspondingly, the soil pressure box guide rails (6) extend to the upper and lower ends of the mold half body (3.1).
3. The pile soil pressure testing device for indoor side slope model test according to claim 2, wherein tensile parts are formed on two sides of the sliding block (1.4), the tensile parts and the sliding block (1.4) form a cross-shaped structure, and the soil pressure box guide rail (6) is formed with accommodating grooves matched with the tensile parts.
4. The pile soil pressure testing device for the indoor side slope model test of claim 1, wherein the pile section connecting member (2) comprises a pile section connecting block (2.1), the inner side wall of the pile section connecting block (2.1) is fixedly connected with a round pile die (3) and extends to the edges of the upper side and the lower side of the round pile die (3), the upper end and the lower end of the pile section connecting block (2.1) are outwards bent and then extend to form a connecting part (2.2), pile section butt joint bolt holes (2.3) are formed in the two connecting parts (2.2), two sliding rail grooves (2.4) are formed in the pile section connecting blocks (2.1) on the two sides of the connecting part (2.2), and the sliding rail grooves (2.4) extend to the upper end and the lower end of the pile section connecting block (2.1), and the connecting rod (1.1) is arranged in the sliding rail grooves (2.4) in a sliding mode.
5. The pile soil pressure testing device for the indoor side slope model test according to claim 4, wherein a slide way connecting piece (1.6) is connected to the end part of the connecting rod (1.1), a pulley (1.7) is rotatably arranged on the slide way connecting piece (1.6), and the pulley (1.7) is in sliding fit with the sliding rail groove (2.4).
6. The pile soil pressure testing device for the indoor side slope model test according to claim 5, wherein the slideway connecting piece (1.6) is composed of two connecting plates (1.6.1) which are arranged in parallel, a mounting hole is formed in the center of each connecting plate (1.6.1), the pulley (1.7) is positioned between the two connecting plates (1.6.1), and rotating shafts on two sides of the pulley are independently penetrated in the mounting hole.
7. The pile soil pressure testing device for the indoor side slope model test according to claim 1, wherein a graduated scale (5) is arranged on the outer wall of the circular pile die (3) in the sea.
8.A pile soil pressure test method for an indoor side slope model test, characterized in that a pile soil pressure test device for an indoor side slope model test according to any one of claims 1 to 7 is used for performing a soil pressure test on a circular slide-resistant pile, comprising the steps of: Firstly, manufacturing a circular pile mould (3); Step two, determining the positions and the number of the soil pressure box forming systems (1) during the test according to the test requirements; Step three, arranging a soil pressure box forming system (1) at a calibration position of a circular pile die (3); step four, determining the length of a pile body to be simulated in a test, repeating the step one to the step three, installing the required number of circular pile moulds (3) and the soil pressure box forming system (1) in place, and then connecting the circular pile moulds (3) with each other through pile section connecting members (2) to form a whole; step five, connecting the lead wire of the soil pressure box forming block (1.5) into a data collecting device, carrying out a soil pressure test after pile body materials in the round pile die (3) reach the strength standard, and collecting soil pressure data born by the pile body; and step six, disassembling the mold after the soil pressure test is finished, and cleaning the disassembled mold.

Description

Pile soil pressure testing device and method for indoor side slope model test Technical Field The invention belongs to the field of indoor model tests of slide piles, and particularly relates to a pile soil pressure test device and a pile soil pressure test method for an indoor side slope model test. Background Circular slide piles are widely applied to landslide hazard management, and particularly along with the transformation of the labor force structure of China society, circular slide piles capable of directly adopting mechanical rotary digging holes are increasingly favored by people. However, in the indoor model test of the round slide-resistant pile, people often directly attach a soil pressure box to the surface of the pile body to measure the soil pressure action of the landslide on the pile body, and the phenomenon of pile body stress concentration at the position of the force sensor is caused by the method, so that the phenomenon of inaccurate internal force data of the pile body is caused. In addition, when people do the indoor model test of the slide-resistant pile, generally, disposable materials (such as PVC pipes and the like) are adopted, and the materials cannot be recovered after the mold is removed, so that the resource waste and the environmental pollution are caused, and the current sustainable development strategy of China is not met. Therefore, it is necessary to develop a pile soil pressure testing device for indoor model test, which can measure accurate data, can reuse a pile body mould and is convenient to disassemble. Disclosure of Invention According to the defects in the prior art, the invention aims to provide a pile soil pressure testing device and a pile soil pressure testing method for an indoor side slope model test, so as to overcome the defect that in the prior art, pile body internal force data are inaccurate due to pile body stress concentration, and a pile body die is not recyclable after die removal. Pile soil pressure testing arrangement for indoor side slope model test, including a plurality of circular pile moulds and a plurality of soil pressure box forming system, adjacent two be connected through pile section connecting piece between the circular pile mould, soil pressure box forming system includes connecting rod and soil pressure box shaping piece, the both sides of soil pressure box shaping piece are connected with the one end of a connecting rod respectively, the other end of connecting rod with pile section connecting piece or circular pile mould outer wall or another connecting rod can dismantle the connection be formed with the through-hole on the circular pile mould, soil pressure box shaping piece warp the through-hole stretches into in the circular pile mould. Further, the circular pile mold is composed of two mold halves with the same structural shape, the through hole is formed between the two mold halves, the soil pressure box forming system is bridged between the two mold halves to connect the two mold halves into a whole, and the pile section connecting members are arranged on the two mold halves. Further, earth pressure box molding system still includes operating handle, center transition piece and sliding block, operating handle's middle part is connected with two connecting rods, operating handle's inner pass through the center transition piece with earth pressure box molding piece is connected fixedly the both sides of center transition piece set up the sliding block two on the through-hole both sides all offered earth pressure box guide rail on the mould halibut, the sliding block slip of center transition piece both sides is spacing in the earth pressure box guide rail that both sides correspond earth pressure box guide rail interpolation of center transition piece top and below is equipped with the pile body strip of paper used for sealing. Further, the through holes extend to the upper and lower ends of the mold half body, and correspondingly, the soil pressure box guide rails extend to the upper and lower ends of the mold half body. Further, a tensile part is formed at both sides of the sliding block, the tensile part and the sliding block form a cross structure, and the soil pressure box guide rail is formed with an accommodating groove matched with the tensile part. Further, pile section connecting elements include the pile section connecting block, and the inside wall and the round pile mould fixed connection of this pile section connecting block extend to round pile mould's upper and lower both sides edge, extend after the upper and lower both ends of pile section connecting block all outwards buckle and form connecting portion, two pile section butt joint bolt hole has all been seted up on the connecting portion pile section connecting block of connecting portion both sides has seted up the slip rail groove, the slip rail groove extends to the upper and lower both ends of pile section connecting block, the connecting rod slip set up