CN211825499U

CN211825499U - Device for cross plate shear test

Info

Publication number: CN211825499U
Application number: CN202020612384.3U
Authority: CN
Inventors: 钱彬; 佘义邦; 占鑫杰; 李秉宜; 范明桥; 杨德财; 韦凯; 唐译; 任杰; 柯松
Original assignee: Nanjing Hydraulic Research Institute of National Energy Administration Ministry of Transport Ministry of Water Resources
Current assignee: Nanjing Hydraulic Research Institute of National Energy Administration Ministry of Transport Ministry of Water Resources
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-10-30
Anticipated expiration: 2030-04-22

Abstract

The utility model relates to a device for a cross plate shear test, which comprises a cross plate, a connecting component and a drill rod, wherein one end of the connecting component is fixedly connected with the cross plate, and the other end of the connecting component is connected with the drill rod; the connecting assembly comprises a connecting rod and a protective cover, and two ends of the connecting rod are respectively fixedly connected with the cross plate and the drill rod; the protective covers comprise a first protective cover and a second protective cover, and the first protective cover and the second protective cover are respectively arranged at the connecting positions of the connecting rod, the cross plate and the drill rod; the utility model solves the problems that a plurality of equipment resources are required to be carried and the personnel cost is caused when the existing cross plate shear test enters the field for detection; the cross plate device and the drilling machine are matched for use, the on-site rapid in-situ cross plate shearing test is carried out, the strength of the cross plate is obtained, the test operation method is simple, the quality is reliable, the working efficiency is improved, and the personnel cost and the time period are shortened.

Description

Device for cross plate shear test

Technical Field

The utility model belongs to the technical field of civil engineering equipment technique and specifically relates to a device for vane shear test.

Background

At present, recent dredger fill and yard sludge are treated by a vacuum preloading method, drilling and sampling and cross plate shear test detection work needs to be carried out on a soft soil foundation before and after treatment, and therefore the problems of carrying of a plurality of equipment resources and bringing of personnel cost are faced during entrance detection.

The cross plate shear test is a field test which applies torque to a cross plate head with a specified shape and size inserted into foundation soil to enable the cross plate head to be twisted at a constant speed in the soil body to form a cylindrical failure surface, and evaluates the non-drainage shear strength of the foundation soil through conversion, and belongs to a soil body in-situ test. The cross plate head is pressed into soft soil at the bottom of a hole from a drill hole, rotates at a uniform speed, and measures torque required by rotation of the cross plate head through a certain measuring system until a soil body is damaged, so that the shearing strength of unearthed soil is calculated.

At present, soft soil foundation treatment and detection relate to drilling sampling and field cross plate tests, two kinds of equipment of a drilling machine and a cross plate instrument are needed, and the drilling machine and the cross plate instrument usually carry a connecting rod with the length of 20 m. On one hand, the equipment is heavy and needs more manpower to carry, the cross plate shearing test with the depth of less than 10m can be completed only by being provided with a hydraulic device, and the test time period is longer; on the other hand, the drilling machine and the cross plate device can not work together, and the use efficiency of the drilling machine is greatly wasted.

For example, chinese patent CN202216879U discloses a cross plate shearing apparatus, which comprises a cross plate head, a main rod, an auxiliary rod and a spring balance, wherein the main rod is a T-shaped structure composed of a vertical rod and a horizontal rod, the cross plate head is installed at the lower end of the vertical rod, the auxiliary rod and the horizontal rod are vertically arranged, the auxiliary rod is movably hinged with the middle part of the horizontal rod, and the spring balance is connected between the auxiliary rod and the horizontal rod; during the test, wait that the cross slab head penetrates the weak soil after, rotatory auxiliary rod drives the main beam through the spring scale and produces the torsional shear moment to the cross slab head, and the soft clay of cross slab head shearing is destroyed, and torsional shear moment is multiplied moment through the spring scale and is measured, can obtain the not drainage shear strength of required soft clay through the conversion. Although the patent realizes the simplest design of the measuring device and the torsion device, the hole needs to be drilled before the test, the test time period is longer, and the test efficiency is low.

Therefore, how to provide a device for a cross plate shear test to realize that the cross plate equipment and a drilling machine are used in a matched manner, so that the on-site rapid in-situ cross plate shear test can be performed, and the working efficiency is improved, which is a technical problem to be solved by technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application aims to provide a device for a cross plate shear test, so as to implement that a cross plate device and a drilling machine are used in cooperation, so that a field rapid in-situ cross plate shear test can be performed, and the work efficiency is improved.

In order to achieve the above object, the present application provides the following technical solutions.

A device for a cross plate shear test comprises a cross plate, a connecting assembly and a drill rod, wherein one end of the connecting assembly is fixedly connected with the cross plate, and the other end of the connecting assembly is connected with the drill rod;

the connecting assembly comprises a connecting rod and a protective cover, and two ends of the connecting rod are respectively fixedly connected with the cross plate and the drill rod;

the protection casing includes first protection casing and second protection casing, first protection casing, second protection casing set up respectively the junction of connecting rod and cross plate, drilling rod.

Preferably, internal threads are respectively arranged at two ends of the connecting rod, a fixing rod is arranged on the cross plate, and external threads corresponding to the internal threads on the connecting rod are arranged on the fixing rod and the drill rod.

Preferably, one end of the connecting rod is provided with an internal thread, the cross plate is provided with a fixing rod, and the fixing rod is provided with an external thread corresponding to the internal thread on the connecting rod;

the other end of the connecting rod is provided with an external thread, and the drill rod is provided with an internal thread corresponding to the external thread on the connecting rod.

Preferably, the first protective cover and the second protective cover are both hollow structures, one end of the first protective cover and one end of the second protective cover are respectively fixed at two ends of the connecting rod, and the other end of the first protective cover and the other end of the second protective cover are respectively sleeved on the fixing rod and the drill rod.

Preferably, the contact position of the first protection cover and the fixed rod and the contact position of the second protection cover and the drill rod are both provided with sealing rings.

Preferably, the connecting rods comprise a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are fixedly connected through a center rod;

the first connecting rod is fixedly connected with the cross plate, and the second connecting rod is fixedly connected with the drill rod.

Preferably, the coupling assembly further comprises a conduit disposed at one side of the coupling rod.

Preferably, a wire hole is arranged in the connecting rod and is communicated with the wire pipe;

the dead lever is hollow structure, the cross plate is connected with a cable, and the cable penetrates through the dead lever, the cable hole to the spool in sequence

Preferably, the connection assembly further comprises a vertical level provided on the connection rod.

The utility model discloses the beneficial technological effect who obtains:

1) the utility model solves the problem that the existing vane shear test needs to carry a plurality of equipment resources and bring personnel cost when entering the field for detection, and the utility model is used for on-site rapid in-situ vane shear test by realizing the cooperation of vane equipment and a drilling machine to obtain the strength of the vane;

2) the utility model is suitable for a detect the vane shear test around the soft base is handled, not only make the rig can accomplish drilling sample work, can also regard as the hydraulic means and the connecting rod of vane instrument, improved the availability factor of rig equipment, and ensured the accuracy of vane intensity survey, experimental simple process, it is convenient to implement, can be used to the deeper vane intensity condition of the degree of depth, consuming time is few, and the practicality is strong.

The foregoing description is only an overview of the technical solutions of the present application, so that the technical means of the present application can be more clearly understood and the present application can be implemented according to the content of the description, and in order to make the above and other objects, features and advantages of the present application more clearly understood, the following detailed description is made with reference to the preferred embodiments of the present application and the accompanying drawings.

The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of a cross plate shear test device used in embodiment 1 of the present disclosure;

fig. 2 is a schematic structural view of a connecting assembly in embodiment 1 of the present disclosure;

FIG. 3 is a schematic structural diagram of a cross plate shear test device used in embodiment 2 of the present disclosure;

fig. 4 is a schematic structural view of a connecting assembly in embodiment 2 of the present disclosure;

fig. 5 is a cross-sectional view of a connection assembly in embodiment 2 of the present disclosure;

FIG. 6 is a schematic structural view of an apparatus for a cross plate shear test in example 3 of the present disclosure;

fig. 7 is a schematic structural diagram of a connection assembly in embodiment 3 of the present disclosure.

In the above drawings: 1. a connecting assembly; 101. a connecting rod; 111. a first connecting rod; 112. a second connecting rod; 113. a center pole; 102. a first shield; 103. a second shield; 104. a conduit; 105. a wire hole; 106. a vertical level; 107. a wire locking sleeve; 2. a cross plate; 201. fixing the rod; 3. a drill stem; 401. a first protective sheath; 402. a second protective sheath.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. In the following description, specific details such as specific configurations and components are provided only to help the embodiments of the present application be fully understood. Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted in the embodiments for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "the embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrase "one embodiment" or "the present embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Further, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.

The term "at least one" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, at least one of a and B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.

It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.

Example 1

As shown in the attached drawing 1, the device for the cross plate shear test comprises a cross plate 2, a connecting assembly 1 and a drill rod 3, wherein one end of the connecting assembly 1 is fixedly connected with the cross plate 2, and the other end of the connecting assembly is connected with the drill rod 3.

As shown in fig. 2, the connection assembly 1 includes a connection rod 101 and a protective cover, and two ends of the connection rod 101 are respectively and fixedly connected to the cross plate 2 and the drill rod 3.

The protective cover comprises a first protective cover 102 and a second protective cover 103, wherein the first protective cover 102 is arranged at the connecting position of the connecting rod 101 and the cross plate 2; the second protective cover 103 is arranged at the connection of the connecting rod 101 and the drill rod 3.

The two ends of the connecting rod 101 are respectively provided with an internal thread, the cross plate 2 is provided with a fixing rod 201, and the fixing rod 201 is provided with an external thread corresponding to the internal thread on the connecting rod 101, so that the cross plate 2 is fixedly connected with the connecting rod 101.

And an external thread corresponding to the internal thread on the connecting rod 101 is arranged on the drill rod 3, so that the drill rod 3 is fixedly connected with the connecting rod 101.

Preferably, the diameter of the inner thread at the bottom end of the connecting rod 101 is 25-30 mm, and the diameter of the thread at the top end is 30-35 mm; the length is 450-600 mm.

Alternatively, an internal thread is provided at one end of the connecting rod 101, a fixing rod 201 is provided on the cross plate 2, and an external thread corresponding to the internal thread on the connecting rod 101 is provided on the fixing rod 201, so that the cross plate 2 is fixedly connected with the connecting rod 101.

The other end of the connecting rod 101 is provided with an external thread, and the drill rod 3 is provided with an internal thread corresponding to the external thread on the connecting rod 101, so that the drill rod 3 is fixedly connected with the connecting rod 101.

The first protective cover 102 and the second protective cover 103 are both hollow structures, one end of the first protective cover 102 and one end of the second protective cover 103 are respectively fixed at two ends of the connecting rod 101, and the other end of the first protective cover 102 and the other end of the second protective cover 103 are respectively sleeved on the fixing rod 201 and the drill rod 3.

Further, the first protection cover 102 and the second protection cover 103 are of a reduced structure, and the caliber of the end of the first protection cover 102 close to the fixing rod 201 is smaller than the caliber of the end of the first protection cover 102 close to the connecting rod 101.

The caliber of one end of the second protective cover 103 close to the drill rod 3 is smaller than the caliber of one end of the second protective cover 103 close to the connecting rod 101.

Further, a sealing ring is arranged at the contact position of the first protection cover 102 and the fixing rod 201, and a sealing ring is arranged at the contact position of the second protection cover 103 and the drill rod 3.

Further, protective sleeves are arranged on the first protective cover 102 and the second protective cover 103, the protective sleeves include a first protective cover 401 and a second protective cover 402, the first protective cover 401 is arranged on the first protective cover 102, and is sleeved on the periphery of the fixing rod 201; the second protective sleeve 402 is disposed on the second protective cover 103, and is sleeved around the drill rod 3.

Further, the outer surfaces of the first protective sleeve 401 and the second protective sleeve 402 are provided with circular arcs at one end, which is beneficial to reducing the abrasion of the device.

Further, both ends of the outer surfaces of the first protective sleeve 401 and the second protective sleeve 402 are provided with circular arcs, which is beneficial to reducing the abrasion of the device.

Further, the inner sides of the first protective sleeve 401 and the second protective sleeve 402 are both provided with sealing rings, so that the waterproof performance of the device is improved.

Example 2

Based on the above embodiment 1, the same parts are not described in detail, but the difference is that, as shown in fig. 3 and 4, the connecting assembly 1 further includes a conduit 104, and the conduit 104 is disposed on one side of the connecting rod 101.

As shown in fig. 5, a wire hole 105 is formed in the connecting rod 101, and the wire hole 105 is communicated with the wire pipe 104.

Preferably, the inner diameter of the conduit 104 is 4-8 mm.

Dead lever 201 is hollow structure, cross plate 2 is connected with the cable conductor, the cable conductor passes dead lever 201, line hole 105 to spool 104 in proper order, pulls out to ground through spool 104, is connected with monitoring instrument.

Further, one end of spool 104 is provided with lockwire cover 107, lockwire cover 107 is used for locking the length of being connected of cable conductor and cross plate 2 prevents that cable conductor and cross plate 2 from contacting unusually.

Further, the inside of the wire locking sleeve 107 is provided with a waterproof ring for preventing water from entering the conduit 104.

It should be noted that the drilling machine and the monitoring instrument are all applied parts of the present application, and are not technical features protected by the present application, and for those skilled in the art, both the drilling machine and the monitoring instrument belong to the prior art, and are not described herein again.

Example 3

Based on the above embodiment 2, the same points are not described again, but as shown in fig. 6 and 7, the connecting rod 101 includes a first connecting rod 111 and a second connecting rod 112, and the first connecting rod 111 and the second connecting rod 112 are fixedly connected by a central rod 113.

The first connecting rod 111 is fixedly connected with the cross plate 2, and the second connecting rod 112 is fixedly connected with the drill rod 3.

Referring to fig. 7, the connecting assembly 1 further includes a vertical level 106, wherein the vertical level 106 is disposed on the connecting rod 101; the vertical level 106 is used to monitor that the drill pipe 3 is kept vertical to the test site before the test.

Further, the vertical level 106 is a vertical measuring bubble and is fixed to the second connecting rod 112 in an embedded manner.

The working process of the device for the cross plate shear test comprises the following steps: preparing in an earlier stage, leveling a drilling machine, connecting a cross plate 2 and a drill rod 3 through a connecting assembly 1, pressing the cross plate 2 into a first point depth through the drilling machine, rotating the drill rod 3 for testing, continuously pressing the cross plate into a next depth, rotating the drill rod 3 for testing, repeating the steps until the test is carried out at the deepest appointed depth, and ending the test.

The early preparation mainly comprises the steps of calibrating a sensor of the cross plate 2, leveling the ground at a test position and ensuring that a drilling machine can drive into the test position; the leveling of the drilling machine is to enable the drilling machine to be horizontal to the ground, so that the pressed drill rod 3 is vertical to the ground at the test position; firstly, the cross plate 2 is connected with one end of a connecting rod, and a cable of the cross plate 2 penetrates out through the fixing rod 201, the connecting rod and the line pipe 104; and then the other end of the connecting rod is connected with the drill rod 3, and finally the drill rod 3 is fixed on the drilling machine.

Pressing the cross plate 2 to a first point depth through a drilling machine, namely slowly pressing the cross plate to the first point depth through the drilling machine, and standing for 2-3 min; the rotary drill rod 3 is used for testing, the drill rod 3 exposed out of the ground is clamped by a pipe wrench to serve as torsion equipment, and the drill rod 3 is slowly rotated clockwise to apply torque until a data result is tested by soil body destruction; and then, the previous steps of continuously pressing to the next depth and rotating the drill rod 3 are repeated, and then the test is finished when the depth required by the design is reached.

According to the actual construction situation on site (the cross plate shear strength test result before the vacuum preloading soft soil foundation of a certain project of the continuous cloud harbor is subjected to vacuum preloading treatment), the device for the cross plate shear test is adopted to carry out the measurement of the shear strength of the cross plate on site, and the test result is shown in table 1.

TABLE 1

As can be seen from Table 1, the test results are basically consistent with the data in the investigation design file, and the device enables the cross plate 2 and the drilling machine to work in a matched mode, and the shearing strength of the cross plate is tested on site.

The device for the cross plate shear test solves the problems that a plurality of equipment resources are required to be carried and the personnel cost is caused when the existing cross plate shear test enters the field for detection; the cross plate device and the drilling machine are matched for use, the on-site rapid in-situ cross plate shearing test is carried out, the strength of the cross plate is obtained, the test operation method is simple, the quality is reliable, the working efficiency is improved, and the personnel cost and the time period are shortened.

The device for the cross plate shear test is suitable for the cross plate shear test before and after soft foundation treatment, so that the drilling machine can complete drilling sampling work, can also be used as a hydraulic device and a connecting rod of a cross plate instrument, improves the service efficiency of drilling machine equipment, ensures the accuracy of cross plate strength measurement, is simple in test process, convenient to implement, capable of being used for the deep cross plate strength condition, less in time consumption and high in practicability.

The above description is only a preferred embodiment of the present invention, and it is not intended to limit the scope of the present invention, and various modifications and changes may be made by those skilled in the art. All changes, modifications, substitutions, integrations and parameter changes to the embodiments, which are within the spirit and principle of the invention, can be made by conventional substitution or can realize the same function without departing from the principle and spirit of the invention, and all fall into the protection scope of the invention.

Claims

1. The device for the cross plate shear test is characterized by comprising a cross plate (2), a connecting assembly (1) and a drill rod (3), wherein one end of the connecting assembly (1) is fixedly connected with the cross plate (2), and the other end of the connecting assembly is connected with the drill rod (3);

the connecting assembly (1) comprises a connecting rod (101) and a protective cover, and two ends of the connecting rod (101) are fixedly connected with the cross plate (2) and the drill rod (3) respectively;

the protective cover comprises a first protective cover (102) and a second protective cover (103), wherein the first protective cover (102) and the second protective cover (103) are respectively arranged at the connecting positions of the connecting rod (101), the cross plate (2) and the drill rod (3).

2. The cross plate shear test device according to claim 1, wherein both ends of the connecting rod (101) are respectively provided with internal threads, the cross plate (2) is provided with a fixing rod (201), and the fixing rod (201) and the drill rod (3) are provided with external threads corresponding to the internal threads of the connecting rod (101).

3. The device for cross plate shear testing of claim 1, wherein one end of the connecting rod (101) is provided with an internal thread, the cross plate (2) is provided with a fixing rod (201), and the fixing rod (201) is provided with an external thread corresponding to the internal thread on the connecting rod (101);

the drill rod is characterized in that the other end of the connecting rod (101) is provided with an external thread, and the drill rod (3) is provided with an internal thread corresponding to the external thread on the connecting rod (101).

4. The device for the cross plate shear test according to claim 2 or 3, wherein the first protective cover (102) and the second protective cover (103) are both hollow structures, one end of the first protective cover (102) and one end of the second protective cover (103) are respectively fixed at two ends of the connecting rod (101), and the other end of the first protective cover is respectively sleeved on the fixing rod (201) and the drill rod (3).

5. The device for a cross plate shear test of claim 4, wherein the contact of the first shield (102) and the fixing rod (201) and the contact of the second shield (103) and the drill rod (3) are provided with sealing rings.

6. The device for cross-plate shear testing of any of claims 1 to 3, wherein the connecting rods (101) comprise a first connecting rod (111) and a second connecting rod (112), the first connecting rod (111) and the second connecting rod (112) being fixedly connected by a central rod (113);

the first connecting rod (111) is fixedly connected with the cross plate (2), and the second connecting rod (112) is fixedly connected with the drill rod (3).

7. Device for a cross-plate shear test according to claim 2 or 3, characterized in that the connection assembly (1) further comprises a conduit (104), the conduit (104) being arranged on one side of the connection rod (101).

8. The device for a cross-plate shear test of claim 7, wherein a wire hole (105) is provided in the connecting rod (101), the wire hole (105) communicating with the wire tube (104);

dead lever (201) are hollow structure, cross plate (2) are connected with the cable conductor, the cable conductor passes dead lever (201), line hole (105) to spool (104) in proper order.

9. Device for cross plate shear test according to any of claims 1 to 3, characterized in that the connection assembly (1) further comprises a vertical level (106), the vertical level (106) being arranged on the connection rod (101).