CN219280715U

CN219280715U - Bamboo joint formula stiffening structure suitable for deep basal pit is strutted under weak geology

Info

Publication number: CN219280715U
Application number: CN202223548493.1U
Authority: CN
Inventors: 高瑞琪; 刘晓敏; 张倩; 徐皓; 郭瑞兴; 田卜元; 康晨阳
Original assignee: China Construction Sixth Engineering Division Co Ltd
Current assignee: China Construction Sixth Engineering Division Co Ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-06-30
Anticipated expiration: 2032-12-28

Abstract

The utility model belongs to the technical field of foundation pit engineering construction, and particularly relates to a bamboo joint type stiffening structure suitable for deep foundation pit support under weak geology, which comprises a stiffening steel pipe body, wherein a closed V-shaped leading-in tip is arranged at the needle-in end at the lower side of the stiffening steel pipe body, the closed V-shaped leading-in tip is tightly fixedly connected with the circumferential side wall of the lower port of the stiffening steel pipe body, grouting guide pipelines and limiting angle steel which are uniformly distributed along the circumference are respectively arranged on the outer wall of the stiffening steel pipe body, the grouting guide pipelines and the limiting angle steel are alternately arranged in the length direction of the stiffening steel pipe body, and the grouting guide pipelines are obliquely upwards arranged and form an acute angle with the axis of the stiffening steel pipe body. The beneficial effects of the utility model are as follows: the reinforcement of the weak geological deep foundation pit and the pit in the pit can be realized without large-scale construction mechanical equipment, the construction is convenient, and the reinforcement effect is good.

Description

Bamboo joint formula stiffening structure suitable for deep basal pit is strutted under weak geology

Technical Field

The utility model belongs to the technical field of foundation pit engineering construction, and particularly relates to a bamboo joint type stiffening structure suitable for deep foundation pit support under weak geology.

Background

In recent years, with the rapid development of urban economy, the height of high-rise buildings is continuously increased, foundation burial depths are continuously increased, and the use functions of underground spaces are more and more varied. Therefore, the area and the excavation depth of the foundation pit are larger and larger, even the situation of pits in the pit occurs, and the traditional foundation pit supporting mode faces the challenges of depth and breadth, especially poor geology.

At present, a cement-soil stirring pile is a common method for reinforcing a saturated soft clay foundation, and soft soil deep in the foundation and injected cement are mechanically and forcedly stirred, so that the soft soil is hard to form a high-quality foundation with integrity, water stability and certain strength. In order to meet the supporting requirements of deep foundation pits and pits in weak geology, the SMW construction method inserts H-shaped steel as a stress reinforcing material before the cement-soil mixture is hardened until cement hardening. However, the insertion of heavy reinforcing materials requires large equipment, and requires special requirements for site conditions. If the surrounding soil is too bad, the pit construction site in the pit is limited, and the use of large machinery is difficult. Moreover, for the reinforcement of ultra-deep foundation pit supports, the perpendicularity of the reinforcement material is difficult to ensure. Therefore, how to realize deep foundation pit support under poor geology and site conditions becomes an urgent problem in the industry to be solved.

Disclosure of Invention

In order to overcome the defects in the prior art, the bamboo joint type stiffening structure suitable for supporting the deep foundation pit under weak geology is provided, the reinforcement of the deep foundation pit and the pit in the weak geology can be realized without large-scale construction mechanical equipment, the construction is convenient, and the reinforcing effect is good.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a bamboo joint type stiffening structure suitable for deep basal pit support under weak geology, includes the stiffening steel pipe body, stiffening steel pipe body downside needle income end is equipped with closed type V type leading-in tip, just closed type V type leading-in tip with the inseparable rigid coupling of circumference lateral wall of stiffening steel pipe body lower port, be equipped with slip casting water conservancy diversion pipeline and spacing angle steel along circumference evenly distributed on the outer wall of stiffening steel pipe body respectively, slip casting water conservancy diversion pipeline with spacing angle steel is in stiffening steel pipe body's length direction sets up in turn, slip casting water conservancy diversion pipeline slope upwards sets up, and with the contained angle of stiffening steel pipe body axis is the acute angle.

The grouting guide pipeline comprises a grouting guide side wall and a pipeline opening, wherein the grouting guide side wall and the pipeline opening are respectively connected with the side wall of the stiffening steel pipe body, and the grouting guide side wall is positioned at the lower edge of the pipeline opening.

The pipeline trompil is circular-arc type trompil, and follows the outside downward sloping of stiffening steel pipe body is slope type, slip casting water conservancy diversion pipeline with the contained angle of stiffening steel pipe body axis is 15 degrees angles.

The two sides of the limiting angle steel are welded on the outer wall of the stiffening steel pipe body, and the sharp corners of the angle steel are supported on the inner wall of the reserved hole of the cement mixing pile. The three-dimensional stable support for the stiffening steel pipe body can be formed, and the perpendicularity of the whole stiffening structure for long-distance downward detection is further guaranteed.

The grouting guide pipelines are arranged at equal intervals in the length direction of the stiffening steel pipe body.

And the limiting angle steel is arranged at equal intervals along the length direction of the stiffening steel pipe body.

The cross section of the grouting diversion side wall is in an inverted trapezoid shape.

The stiffening steel pipe body is a hollow round steel pipe or a ribbed round steel pipe, and the size of the stiffening steel pipe body is smaller than the hollow size of the reserved hole of the cement mixing pile.

The number of grouting guide pipelines along the circumferential section of the stiffening steel pipe body is 4, and the number of limiting angle steel along the circumferential section of the stiffening steel pipe body is 3.

The beneficial effects of the utility model are as follows: the front end of the stiffening steel pipe body is provided with the closed V-shaped leading-in tip, so that the resistance of driving the stiffening steel pipe body is reduced. The pipeline trompil is circular-arc type trompil, and pipeline trompil cross-section is slope shape to and oval trompil lower edge is 15 degrees angles's of stiffening steel pipe body's the setting of pouring trapezoidal slip casting water conservancy diversion pipeline, has not only shown the probability that has reduced the stifled hole in the slip casting process, has still increased the adhesion stress of stiffening steel pipe body and new slurry. The limit angle steel preset on the side wall of the stiffening steel pipe body can ensure the perpendicularity of long-distance downward detection of the elongated stiffening member. The bamboo-type stiffening structure with the structure and the mode of grouting insertion after hole forming are adopted, so that the soil body is stiffened, and the requirement on mechanical equipment is reduced.

Drawings

FIG. 1 is a three-dimensional schematic view of a bamboo joint type stiffening structure of the present utility model;

FIG. 2 is a three-dimensional exploded view of FIG. 1;

fig. 3 is a top view of the present utility model.

In the figure: 1. the reinforced steel pipe comprises a stiffening steel pipe body, a closed V-shaped leading-in tip, 3 grouting guide pipelines, 3-1 pipeline openings, 3-2 grouting guide side walls, 4 limit angle steel.

Detailed Description

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be the communication between the two parts. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

The bamboo joint type stiffening structure suitable for deep foundation pit support under weak geology of this embodiment, as shown in fig. 1-3, including stiffening steel pipe body 1, needle into the end setting at the downside of stiffening steel pipe body 1 and the closed V type of stiffening steel pipe body 1 lateral wall rigid coupling leading-in tip 2, set up respectively at stiffening steel pipe body 1's outer wall along circumference evenly distributed's pouring trapezoidal slip casting water conservancy diversion pipeline 3 and spacing angle steel 4, pouring trapezoidal slip casting water conservancy diversion pipeline 3 and spacing angle steel 4 are at stiffening steel pipe body 1's length direction interval staggered distribution. The grouting guide pipeline 4 is obliquely upwards arranged and forms an acute angle with the axis of the stiffening steel pipe body 1. Wherein:

the stiffening steel pipe body 1 is a hollow (or ribbed) round steel pipe, and the size is slightly smaller than the hollow size of the reserved hole of the cement mixing pile according to stiffening requirements.

The grouting guide pipelines 3 are arranged on the circumference of the outer wall of the stiffening steel pipe body 1 at equal intervals and comprise pipeline openings 3-1 and cambered inverted trapezoid grouting guide side walls 3-2 which are respectively connected with the side walls of the stiffening steel pipe body 1, and the grouting guide side walls 3-2 are positioned at the lower edges of the pipeline openings 3-1. The section of the pipeline opening 3-1 is in a slope shape and is inclined outwards and downwards from the stiffening steel pipe body 1; the included angle between the grouting diversion side wall 3-2 and the side wall of the stiffening steel pipe body 1 is preferably 15 degrees.

The spacing angle steel 4 is also arranged at equal intervals in the length direction of the stiffening steel pipe body 1. Both ends welding of spacing angle steel 4 are on the lateral wall of stiffening steel pipe body 1, and the closed angle department of spacing angle steel 1 supports on the inner wall of cement mixing pile preformed hole. The three-way stable support for the stiffening steel pipe body 1 can be formed, and the perpendicularity of the stiffening structure for long-distance downward detection is further ensured.

In this embodiment, the number of grouting guide pipelines 3 along the circumferential section of the stiffening steel pipe body 1 is 4, and the number of spacing angle steel 4 along the circumferential section of the stiffening steel pipe body 1 is 3, so that the perpendicularity of long-distance downward detection of the elongated stiffening member can be effectively ensured.

The foregoing detailed description of the embodiments of the utility model has been presented only to illustrate the preferred embodiments of the utility model and should not be taken as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.

Claims

1. Bamboo joint formula stiffening structure suitable for deep basal pit support under weak geology, its characterized in that: including the stiffening steel pipe body, stiffening steel pipe body downside needle income end is equipped with closed V type and leads into the tip, just closed V type lead-in the tip with the inseparable rigid coupling of circumference lateral wall of stiffening steel pipe body lower port, be equipped with slip casting water conservancy diversion pipeline and spacing angle steel along circumference evenly distributed on the outer wall of stiffening steel pipe body respectively, slip casting water conservancy diversion pipeline with spacing angle steel is in stiffening steel pipe body's length direction sets up in turn, slip casting water conservancy diversion pipeline slope upwards sets up, and with the contained angle of stiffening steel pipe body axis is the acute angle.

2. A bamboo joint type stiffening structure according to claim 1, wherein: the grouting guide pipeline comprises a grouting guide side wall and a pipeline opening, wherein the grouting guide side wall and the pipeline opening are respectively connected with the side wall of the stiffening steel pipe body, and the grouting guide side wall is positioned at the lower edge of the pipeline opening.

3. A bamboo joint type stiffening structure according to claim 2, wherein: the pipeline open hole is circular arc open hole, and outwards, downward sloping from the stiffening steel pipe body is slope type, slip casting water conservancy diversion pipeline with the contained angle of stiffening steel pipe body axis is 15.

4. A bamboo joint type stiffening structure according to claim 1, wherein: the two sides of the limiting angle steel are welded on the outer wall of the stiffening steel pipe body, and the sharp corners of the angle steel are supported on the inner wall of the reserved hole of the cement mixing pile.

5. A bamboo joint type stiffening structure according to claim 1, wherein: the grouting guide pipelines are arranged at equal intervals in the length direction of the stiffening steel pipe body.

6. A bamboo joint type stiffening structure according to claim 1, wherein: and the limiting angle steel is arranged at equal intervals along the length direction of the stiffening steel pipe body.

7. A bamboo joint type stiffening structure according to claim 2, wherein: the cross section of the grouting diversion side wall is in an inverted trapezoid shape.

8. A bamboo joint type stiffening structure according to claim 1, wherein: the stiffening steel pipe body is a hollow round steel pipe or a ribbed round steel pipe, and the size of the stiffening steel pipe body is smaller than the hollow size of the reserved hole of the cement mixing pile.

9. A bamboo joint type stiffening structure according to claim 1, wherein: the number of grouting guide pipelines along the circumferential section of the stiffening steel pipe body is 4, and the number of limiting angle steel along the circumferential section of the stiffening steel pipe body is 3.