CN111455965A

CN111455965A - Rear-mounted soil pressure cell mounting device and method

Info

Publication number: CN111455965A
Application number: CN202010430212.9A
Authority: CN
Inventors: 王希宝; 袁松; 李飞腾; 张生
Original assignee: Sichuan Communication Surveying and Design Institute Co Ltd
Current assignee: Sichuan Communication Surveying and Design Institute Co Ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-07-28

Abstract

The invention discloses a rear-mounted earth pressure cell mounting device and a rear-mounted earth pressure cell mounting method, which are used for protecting a sensor and a cable from being damaged before a mounting process and a test as far as possible. The soil pressure box comprises connecting steel bars, longitudinal steel bars and steel bars welded with the soil pressure box, wherein the three longitudinal steel bars and the plurality of connecting steel bars form a truss structure. The method can be used for carrying out in-situ soil pressure test after small-diameter vertical, inclined or horizontal holes are formed by methods such as drilling and the like in an exploration stage or other stages to obtain in-situ soil pressure values.

Description

Rear-mounted soil pressure cell mounting device and method

Technical Field

The invention relates to the field of foundation engineering and geotechnical engineering, in particular to a device and a method for installing a rear-mounted soil pressure box.

Background

In the field of geotechnical engineering, not only the soil pressure directly acting on a building structure or a supporting structure needs to be known in geotechnical investigation design, but also the in-situ soil pressure at different positions in the soil body needs to be known in some scientific researches. The in-situ soil pressure and the soil pressure acting on the structure are obtained mainly through indirect theoretical calculation at present. And directly obtaining the actual soil pressure at the determined position, and testing by adopting a soil pressure cell. In the conventional soil pressure test, after construction and excavation, a soil pressure box is buried in the soil facing surface of a building enclosure, or the soil pressure box is installed at a required position by adopting an active driving method and the like. The former is front-mounted, and the problems that the sensor is damaged and the cable is broken and the like are difficult to recover are easily caused in the foundation construction process. This method of installation has been a difficult and painful point for field soil pressure testing.

Disclosure of Invention

The invention provides a rear-mounted earth pressure cell mounting device and a rear-mounted earth pressure cell mounting method, which are used for protecting a sensor and a cable from being damaged as far as possible before a mounting process and a test.

The invention is realized by the following technical scheme:

a method for installing a rear-mounted soil pressure cell comprises the following steps:

step 1: drilling a hole by using a geological drilling machine or a jumbolter;

step 2: the triangular truss with the soil pressure cell is deeply inserted into the drilling hole in the step 1, and the wiring arrangement of the soil pressure cell is completed;

and step 3: and (5) refilling dry sand.

In the step 2, the distance from the hole wall of the formed hole to the outer edge of the soil pressure cell is not less than 40 mm.

The method comprises the following steps that the soil pressure cell is preset, a steel bar is welded on the back of the soil pressure cell, and the triangular truss with the soil pressure cell is obtained after the steel bar is connected to a support.

Further, the steel bars are connected to the brackets by welding or binding.

The utility model provides an installation device of rear-mounted soil pressure cell, includes connecting reinforcement, longitudinal reinforcement, three with soil pressure cell welded billet longitudinal reinforcement and a plurality of connecting reinforcement form truss structure, connecting reinforcement is used for fixed spacing longitudinal reinforcement, the billet is used for welding or ties up the soil pressure cell extremely on truss structure's longitudinal reinforcement.

Furthermore, every two connecting steel bars are arranged between every two longitudinal steel bars in a crossed mode, two ends of each connecting steel bar are welded to the two longitudinal steel bars respectively, and the horizontal distance between the axes of the two longitudinal steel bars is the same.

Further, the soil pressure box is welded or bound on the outer side of the truss structure.

The invention has the following advantages and beneficial effects:

the method can be used for carrying out in-situ soil pressure test after small-diameter vertical, inclined or horizontal holes are formed by methods such as drilling and the like in an exploration stage or other stages to obtain in-situ soil pressure values.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a side view of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a preset view of the soil pressure cell of the present invention.

Fig. 4 is a front view of the present invention.

Reference numbers and corresponding part names in the drawings:

1. connecting reinforcing steel bars; 2. longitudinal reinforcing steel bars; 3. a soil pressure cell; 4. drying sand; 5. and (5) wiring the soil pressure cell.

Detailed Description

Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive changes, are within the scope of the present invention.

A method for installing a rear-mounted soil pressure cell, as shown in fig. 4, comprising the steps of:

step 1: drilling a hole by using a geological drilling machine or a jumbolter;

step 2: the triangular truss with the soil pressure cell 3 is deeply inserted into the drilling hole in the step 1, and the wiring arrangement of the soil pressure cell 3 is completed;

and step 3: the dry sand 4 is refilled.

In the step 2, the distance from the hole wall of the formed hole to the outer edge of the soil pressure box 3 is not less than 40 mm.

The step 1 is also preceded by presetting the soil pressure cell 3, welding a steel bar on the back of the soil pressure cell 3, and connecting the steel bar to a bracket to obtain the triangular truss with the soil pressure cell 3.

On the basis of the above embodiment, the steel bars are connected to the brackets by welding or binding.

The utility model provides an installation device of rear-mounted soil pressure cell, as shown in fig. 1-3, including connecting reinforcement 1, longitudinal reinforcement 2, with the 3 welded billet of soil pressure cell, three longitudinal reinforcement 2 and a plurality of connecting reinforcement 1 form the truss structure, connecting reinforcement 1 is used for fixed spacing longitudinal reinforcement 2, the billet is used for welding or bind and roll soil pressure cell 3 to on the longitudinal reinforcement 2 of truss structure.

On the basis of the previous embodiment, every two longitudinal steel bars 2 are provided with connecting steel bars 1 in a crossed mode, two ends of each connecting steel bar 1 are welded to the two longitudinal steel bars 2 respectively, and the horizontal distances between the axes of the two longitudinal steel bars 2 are the same.

On the basis of the last embodiment, the earth pressure cell 3 is welded or taped to the outside of the truss structure.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The method for installing the rear-mounted soil pressure box is characterized by comprising the following steps of:

step 1: drilling a hole by using a geological drilling machine or a jumbolter;

step 2: the triangular truss with the soil pressure cell (3) is deeply inserted into the drilling hole in the step 1, and wiring of the soil pressure cell (3) is completed;

and step 3: and (4) refilling dry sand.

2. The method for installing the rear-mounted soil pressure cell according to claim 1, wherein in the step 2, the wall of the formed hole is not less than 40mm from the outer edge of the soil pressure cell (3).

3. The method for installing the rear-mounted soil pressure cell according to claim 1, wherein the step 1 is preceded by presetting the soil pressure cell (3), welding a steel bar on the back surface of the soil pressure cell (3), and connecting the steel bar to a bracket to obtain the triangular truss with the soil pressure cell (3).

4. The method for installing a post-mounted soil pressure cell according to claim 3, wherein the steel bars are connected to the support by welding or binding.

5. The utility model provides an installation device of rear-mounted soil pressure cell, its characterized in that, including connecting reinforcement (1), longitudinal reinforcement (2), with soil pressure cell (3) welded billet, it is three longitudinal reinforcement (2) and a plurality of connecting reinforcement (1) form the truss structure, connecting reinforcement (1) are used for fixed spacing longitudinal reinforcement (2), the billet is used for welding or bind and roll soil pressure cell (3) extremely on the longitudinal reinforcement (2) of truss structure.

6. The post-mounted soil pressure cell installation device according to claim 5, wherein a connecting bar (1) is arranged between every two longitudinal bars (2) in a crossing manner, two ends of the connecting bar (1) are respectively welded on the two longitudinal bars (2), and the horizontal distance between the axes of the two longitudinal bars (2) is the same.

7. The post-mounted earth pressure cell installation device according to claim 5, characterized in that the earth pressure cell (3) is welded or bound to the outside of the truss structure.