CN214401813U - Soil texture foundation ditch steel-pipe pile composite retaining structure - Google Patents

Abstract

The utility model relates to a soil texture foundation ditch steel-pipe pile composite retaining structure, front-seat steel-pipe pile and back row steel-pipe pile including a plurality of parallel arrangement, back timber rigid connection is passed through on the top of front-seat steel-pipe pile and the top of row steel-pipe pile, and the bottom of steel-pipe pile is all sealed to be set up, and steel-pipe pile health evenly is equipped with a plurality of injected holes, and the injected hole sets up the barb protection architecture of certain length outward, ensures the mud jacking quality and increases steel-pipe pile and soil body bonding strength, and is a plurality of front-seat steel-pipe pile faces the fixed panel construction that is equipped with of empty side (foundation ditch excavation side). The utility model has the advantages that: the steel pipe pile can cyclic utilization, is a green foundation ditch supporting construction, through high-pressure slip casting in the steel pipe, has improved the anti shear strength of the soil body between the stake, and the soil body between steel pipe pile and steel pipe pile forms compound retaining structure, and similar muscle gravity retaining wall has reduced the cost and the construction degree of difficulty of soil property foundation ditch support, practices thrift construction period, has improved the reliability of supporting construction system.

Description

Soil texture foundation ditch steel-pipe pile composite retaining structure

Technical Field

The utility model relates to a technical field is strutted to side slope and landslide, especially relates to a soil property foundation ditch steel-pipe pile composite retaining structure.

Background

In order to reduce the influence of earth excavation on the surrounding environment, currently, reinforced concrete pile plate retaining wall piles are widely applied to foundation pit engineering and slope engineering, and although the pile body strength is high, the traditional pile plate retaining wall is single in structural form, large in pile section and large in reinforcement arrangement, so that the construction period is long, and the construction cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a soil foundation ditch steel-pipe pile composite retaining structure is provided, reduced soil foundation ditch supporting's the cost and the construction degree of difficulty, practice thrift construction cycle, improved the reliability of supporting construction system.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a soil texture foundation ditch steel-pipe pile composite retaining structure, includes a plurality of parallel arrangement's front-row steel-pipe pile and a plurality of parallel arrangement's back row steel-pipe pile, the top of front-row steel-pipe pile with back row steel-pipe pile's top is through back timber fixed connection, front-row steel-pipe pile with back row steel-pipe pile is the contained angle setting, front-row steel-pipe pile with back row steel-pipe pile's bottom is all sealed the setting, front-row steel-pipe pile with evenly be equipped with a plurality of injected holes on the back row steel-pipe pile, just front-row steel-pipe pile deviates from the upper portion of back row steel-pipe pile one side is confined tube face, and is a plurality of front-row steel-pipe pile deviates from the fixed panel construction that is equipped with in upper portion of back row steel-pipe pile one side.

The utility model has the advantages that: the advantages of the steel pipe piles are fully utilized, the load effect of the soil pressure is reacted into the compression resistance of the front row of steel pipe piles and the tensile resistance of the rear row of steel pipe piles, the compression strength and the tensile strength of the steel pipe piles and the shear strength of soil among the piles are fully utilized, the soil body between the steel pipe piles and the steel pipe piles forms a gravity type retaining wall, the cost and the construction difficulty of the soil foundation pit support are reduced, the construction period is saved, and the reliability of a support structure system is improved; the front row of steel pipe piles and the rear row of steel pipe piles can be recycled, and the green and environment-friendly foundation pit supporting structure is provided.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, every the below in slip casting hole all is equipped with thick liquid diffusion hole barb, the bottom of thick liquid diffusion hole barb with preceding row steel-pipe pile or the outer wall fixed connection of back row steel-pipe pile, the slip casting hole is corresponding with it in the horizontal projection of thick liquid diffusion hole barb.

The beneficial effect of adopting the further scheme is that: through setting up thick liquid diffusion hole barb for steel-pipe pile of front row steel-pipe pile or back row steel-pipe pile form the steel-pipe pile of barb structure, greatly increased the frictional force of soil body with the stake, reduce ground pressure, and protect the injected hole, avoid the injected hole to be blockked up.

Furthermore, the slurry diffusion hole barbs are angle steel which is obliquely arranged, the bottom ends of the angle steel are fixedly connected with the outer walls of the front row of steel pipe piles or the rear row of steel pipe piles, and the top ends of the angle steel are arranged at intervals with the outer walls of the front row of steel pipe piles or the rear row of steel pipe piles.

The beneficial effect of adopting the further scheme is that: the slurry diffusion hole barb adopts the angle steel that the slope set up, and the source is wide, and intensity is high.

The steel pipe pile comprises a front row of steel pipe piles, a rear row of steel pipe piles, a plurality of middle steel pipe piles, a top beam and a plurality of vertical middle steel pipe piles, wherein the middle steel pipe piles are arranged between the front row of steel pipe piles and the rear row of steel pipe piles, and the top ends of the middle steel pipe piles are fixedly connected with the top beam.

The beneficial effect of adopting the further scheme is that: the setting of middle steel-pipe pile can further improve holistic intensity.

Further, the bottom ends of the front row of steel pipe piles and the bottom ends of the rear row of steel pipe piles are both in a conical structure.

The beneficial effect of adopting the further scheme is that: the bottom of the front row of steel pipe piles and the bottom of the rear row of steel pipe piles adopt conical structures, so that the front row of steel pipe piles and the rear row of steel pipe piles can be conveniently inserted into the mounting holes.

Further, the panel structure comprises a panel body and a panel reinforcing mesh, the panel reinforcing mesh is fixedly connected with the upper portion of one side, away from the rear row of the steel pipe piles, of the front row of the steel pipe piles, and the panel body is fixedly connected with the panel reinforcing mesh.

The beneficial effect of adopting the further scheme is that: the panel body is fixed through the panel reinforcing mesh, and the strength of the panel structure can be ensured.

Further, the radial cross section where the grouting holes on the front row of steel pipe piles and the rear row of steel pipe piles are located is a grouting cross section, and the number of the grouting holes on each grouting cross section is more than two.

The beneficial effect of adopting the further scheme is that: at least two grouting holes are formed in one grouting cross section, so that sufficient grout can flow out of the grouting holes, the property of the soil body is changed, and the shear strength of the soil body is improved.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a construction method of a soil foundation pit steel pipe pile composite retaining structure comprises the following steps:

firstly, measuring and setting out, and determining the mounting positions of a front row of steel pipe piles and a rear row of steel pipe piles;

drilling holes, namely drilling holes at the positions where the front row of steel pipe piles and the rear row of steel pipe piles are installed;

step three, inserting the front row of steel pipe piles and the rear row of steel pipe piles into holes of drilled holes respectively;

grouting the front row of steel pipe piles and the rear row of steel pipe piles;

installing top beams at the tops of the front row of steel pipe piles and the rear row of steel pipe piles, and fixedly connecting the top beams with the front row of steel pipe piles and the rear row of steel pipe piles;

after the night in the front row of steel pipe piles and the rear row of steel pipe piles reaches the design strength, excavating soil bodies in front of the piles in a segmented and graded manner;

and seventhly, constructing a panel, welding a panel reinforcing mesh on the upper part of one side of the front row of steel pipe piles, which is far away from the rear row of steel pipe piles, and then fixing the panel body on the panel reinforcing mesh.

The beneficial effect who adopts above-mentioned scheme is: the advantages of the steel pipe piles are fully utilized, the load effect of the soil pressure is reacted into the compression resistance of the front row of steel pipe piles and the tensile resistance of the rear row of steel pipe piles, the compression strength and the tensile strength of the steel pipe piles and the shear strength of soil among the piles are fully utilized, the soil body between the steel pipe piles and the steel pipe piles forms a gravity type retaining wall, the cost and the construction difficulty of soil foundation pit supporting are reduced, the construction period is saved, and the reliability of a supporting structure system is improved.

Further, in the fourth step, the grouting adopts a staged pressure grouting mode, and the grouting pressure is 10 mpa.

And further, the four steps are adopted, and the grouting process ensures that the grout in each grouting hole is pressed out.

The beneficial effect of adopting the further scheme is that: by means of high-pressure subsection grouting of 10Mpa, slurry flows out of each grouting hole, the properties of surrounding soil bodies are improved, and the shear strength of the soil bodies is improved.

Drawings

Fig. 1 is a schematic diagram showing the relative arrangement of a front row of steel pipe piles and a rear row of steel pipe piles in the first embodiment of the present invention;

fig. 2 is a schematic diagram showing the relative arrangement of a front row of steel pipe piles and a rear row of steel pipe piles in the second embodiment of the present invention;

fig. 3 is a schematic diagram showing the relative arrangement of the front row steel pipe piles and the rear row steel pipe piles in the third embodiment of the present invention;

fig. 4 is a schematic diagram showing the relative arrangement of a front row of steel pipe piles and a rear row of steel pipe piles in a fourth embodiment of the present invention;

fig. 5 is a schematic structural view of a rear row of steel pipe piles in the embodiment of the present invention;

fig. 6 is a top view of a rear row of steel pipe piles in the embodiment of the present invention;

fig. 7 is a front view of an embodiment of the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

1. front row steel pipe piles; 2. rear row steel pipe piles; 3. a top beam; 4. grouting holes; 5. slurry diffusion hole barbs; 6. middle steel pipe piles; 7. a tapered structure; 8. a panel body; 9. the panel reinforcing mesh.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example one

As shown in fig. 1, 5, 6, and 7, the present embodiment includes a plurality of front row steel pipe piles 1 arranged in parallel and a plurality of rear row steel pipe piles 2 arranged in parallel, where the front row steel pipe piles 1 and the rear row steel pipe piles 2 are arranged in one-to-one correspondence, the top ends of the front row steel pipe piles 1 and the top ends of the rear row steel pipe piles 2 are fixedly connected by top beams 3, the front row steel pipe piles 1 and the rear row steel pipe piles 2 are arranged at included angles, the front row steel pipe piles 1 and the rear row steel pipe piles 2 form a portal structure system, specifically, in the present embodiment, the front row steel pipe piles 1 are arranged obliquely, the included angles with the vertical direction are 70 ° -80 °, the rear row steel pipe piles 2 are arranged vertically, the bottom ends of the front row steel pipe piles 1 and the rear row steel pipe piles 2 are both arranged in a sealed manner, a plurality of grouting holes 4 are uniformly arranged on the front row steel pipe piles 1 and the rear row steel pipe piles 2, the aperture is preferably 20-50mm, the upper part of one side of the front row of steel pipe piles 1, which deviates from the rear row of steel pipe piles 2, is a closed pipe surface, the closed pipe surface means that no grouting hole 4 is arranged at the section, and a panel structure is fixedly arranged on the upper parts of the sides of the front row of steel pipe piles 1, which deviate from the rear row of steel pipe piles 2. In this embodiment, the front row of steel pipe piles 1 and the rear row of steel pipe piles 2 are preferably welded by hot rolling or heat treatment, and are made of steel pipes or seamless steel pipes, the bottom ends of the steel pipes or seamless steel pipes are preferably made into a closed cone shape, the angle of the pointed cone is 45 degrees, and the top of the steel pipes or seamless steel pipes is preferably provided with a structural reinforcement measure for preventing the steel pipes from deforming. The horizontal distance between two adjacent front rows of steel pipe piles 1 is preferably 1.5-3 m.

In this embodiment, every the below of grout hole 4 all is equipped with thick liquid diffusion hole barb 5, the bottom of thick liquid diffusion hole barb 5 with preceding row steel-pipe pile 1 or the outer wall fixed connection of back row steel-pipe pile 2, grout hole 4 is corresponding with it in the horizontal projection of thick liquid diffusion hole barb 5. Through setting up thick liquid diffusion hole barb 5, greatly increased the frictional force of the soil body with the stake, reduced ground pressure to protect grouting hole 4, avoid grouting hole 4 to be blocked. Specifically, the angle steel that slurry diffusion hole barb 5 set up for the slope, the bottom of angle steel with front row steel-pipe pile 1 or the outer wall fixed connection of back row steel-pipe pile 2, the top of angle steel with front row steel-pipe pile 1 or the outer wall interval of back row steel-pipe pile 2 sets up, and slurry diffusion hole barb 5 adopts the angle steel that the slope set up, and the source is wide, and intensity is high. In the embodiment, the slurry diffusion hole barbs 5 adopt hot-rolled equal-angle steel of Q235B, the included angle between the angle steel and the front row of steel pipe piles 1 or the rear row of steel pipe piles 2 is preferably 20-30 degrees, the width of the angle steel is 50mm, the thickness of the angle steel is 5.0mm, and the length of the angle steel is 50 mm; m 1-300 mm, m-300 mm, d-20-50 mm, m 2-300 mm.

In this embodiment, the bottom ends of the front row of steel pipe piles 1 and the bottom ends of the rear row of steel pipe piles 2 are both tapered structures 7, and the tapered structures 7 are adopted at the bottom ends of the front row of steel pipe piles 1 and the bottom ends of the rear row of steel pipe piles 2, so that the front row of steel pipe piles 1 and the rear row of steel pipe piles 2 can be conveniently inserted into the mounting holes.

It should be noted that the panel structure includes a panel body 8 and a panel mesh reinforcement 9, the panel mesh reinforcement 9 is fixedly connected to the upper portion of the front row of steel-pipe piles 1 on the side away from the rear row of steel-pipe piles 2, the panel body 8 is fixedly connected to the panel mesh reinforcement 9, the panel body 8 is fixed by the panel mesh reinforcement 9, and the strength of the panel structure can be ensured. The radial cross section where the grouting holes 4 in the front row of steel pipe piles 1 and the rear row of steel pipe piles 2 are located is a grouting cross section, the number of the grouting holes 4 in each grouting cross section is more than two, and at least two grouting holes 4 are arranged in one grouting cross section, so that sufficient grout can flow out of the grouting holes 4, the property of a soil body is changed, and the shear strength of the soil body is improved.

The embodiment also discloses a construction method of the soil foundation pit steel pipe pile composite retaining structure, which comprises the following steps:

firstly, measuring and setting out, and determining the installation positions of a front row of steel pipe piles 1 and a rear row of steel pipe piles 2;

drilling, namely drilling holes at the positions where the front row of steel pipe piles 1 and the rear row of steel pipe piles 2 are determined to be installed;

step three, inserting the front row of steel pipe piles 1 and the rear row of steel pipe piles 2 into holes of drilled holes respectively;

grouting the front row of steel pipe piles 1 and the rear row of steel pipe piles 2;

fifthly, mounting a top beam 3 on the tops of the front row of steel pipe piles 1 and the rear row of steel pipe piles 2, and fixedly connecting the top beam 3 with the front row of steel pipe piles 1 and the rear row of steel pipe piles 2;

after the night in the front row of steel pipe piles 1 and the rear row of steel pipe piles 2 reaches the design strength, excavating soil bodies in front of the piles in a segmented and graded manner;

and seventhly, constructing a panel, welding a panel reinforcing mesh 9 on the upper part of one side, away from the rear row of steel pipe piles 2, of the front row of steel pipe piles 1, and then fixing the panel body 8 on the panel reinforcing mesh 9.

The advantages of the steel pipe piles are fully utilized, the load effect of the soil pressure is reacted into the compression resistance of the front row of steel pipe piles 1 and the tensile resistance of the rear row of steel pipe piles 2, the compression strength and the tensile strength of the steel pipe piles and the shear strength of soil among the piles are fully utilized, a gravity type retaining wall is formed by soil bodies among the steel pipe piles and the steel pipe piles, the cost and the construction difficulty of soil foundation pit supporting are reduced, the construction period is saved, and the reliability of a supporting structure system is improved.

Further, in the fourth step, the grouting adopts a staged pressure grouting mode, and the grouting pressure is 10 mpa. And the step four is to ensure that the grout in each grouting hole is pressed out in the grouting process. By means of high-pressure subsection grouting of 10Mpa, grout flows out of each grouting hole 4, the properties of surrounding soil are improved, and the shear strength of the soil is improved.

Example two

As shown in fig. 2, the present embodiment is different from the first embodiment in that: in this embodiment, the rear row of steel pipe piles 2 are arranged obliquely, and the included angle between the rear row of steel pipe piles 2 and the vertical direction is 70-80 degrees, the front row of steel pipe piles 1 are arranged vertically,

EXAMPLE III

As shown in fig. 3, the present embodiment is different from the first embodiment in that: in the embodiment, the front row of steel pipe piles 1 and the rear row of steel pipe piles 2 are obliquely arranged, the tops of the front row of steel pipe piles and the rear row of steel pipe piles are fixedly arranged through the top beam 3, the bottoms of the front row of steel pipe piles and the rear row of steel pipe piles are inclined towards the direction away from each other, and the included angles between the front row of steel pipe piles and the vertical direction are 70-80 degrees.

Example four

As shown in fig. 4, on the basis of the third embodiment, the following improvements are made in the present embodiment: still include the middle steel-pipe pile 6 of a plurality of vertical settings, be equipped with on middle steel-pipe pile 6 the slip casting hole 4 with slurry diffusion hole barb 5, the bottom of middle steel-pipe pile 6 is toper structure 7, middle steel-pipe pile 6 is established front-seat steel-pipe pile 1 with between the back row steel-pipe pile 2, the top of middle steel-pipe pile 6 with back timber 3 fixed connection, the setting of middle steel-pipe pile 6 can further improve holistic intensity.

The utility model discloses strut mechanism: (1) and converting the soil pressure into the pressure of the front row of steel pipe piles 1 and the tension of the rear row of steel pipe piles 2. (2) The soil body between the steel pipe piles is grouted through high pressure, the shear strength of the soil body is improved, the front row of steel pipe piles 1, the rear row of steel pipe piles 2 and the improved soil body among the piles form a whole, and the reinforced gravity type retaining wall is similar to a reinforced gravity type retaining wall.

The utility model has the advantages that: (1) through setting up the barb around front row steel-pipe pile 1 and the back row steel-pipe pile 2, greatly increased the frictional force of soil body and stake, reduced ground pressure. (2) The soil body property around is improved and the shear strength of the soil body is improved through the high-pressure grouting of 10 Mpa. (3) The front row of steel pipe piles 1, the rear row of steel pipe piles 2 and the improved soil body among the piles form a whole, and the structure supporting capability is improved similar to a gravity type retaining wall. (4) The deformation of the foundation pit can be well controlled. (4) The construction needs smaller machinery, is quicker in construction, saves the supporting cost and has better economy.

In the description of the present invention, it is to be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (7)

1. A soil foundation pit steel pipe pile composite retaining structure is characterized by comprising a plurality of front row steel pipe piles (1) arranged in parallel and a plurality of rear row steel pipe piles (2) arranged in parallel, the top end of the front row of steel pipe piles (1) is fixedly connected with the top end of the rear row of steel pipe piles (2) through a top beam (3), the front row of steel pipe piles (1) and the rear row of steel pipe piles (2) are arranged at an included angle, the bottom ends of the front row of steel pipe piles (1) and the rear row of steel pipe piles (2) are hermetically arranged, a plurality of grouting holes (4) are uniformly arranged on the front row of steel pipe piles (1) and the rear row of steel pipe piles (2), and the upper part of one side of the front row of steel pipe piles (1), which deviates from the rear row of steel pipe piles (2), is a closed pipe surface, and the upper parts of the front row of steel pipe piles (1), which deviate from the side of the rear row of steel pipe piles (2), are fixedly provided with panel structures.

2. The soil foundation pit steel pipe pile composite retaining structure of claim 1, wherein each grout hole (4) is provided with a grout diffusion hole barb (5) thereunder, the bottom end of the grout diffusion hole barb (5) is fixedly connected with the outer wall of the front row of steel pipe piles (1) or the outer wall of the rear row of steel pipe piles (2), and the grout holes (4) are in the horizontal projection of the grout diffusion hole barbs (5) corresponding to the grout holes.

3. The soil foundation pit steel pipe pile composite retaining structure according to claim 2, wherein the slurry diffusion hole barbs (5) are obliquely arranged angle steel, the bottom ends of the angle steel are fixedly connected with the outer walls of the front row of steel pipe piles (1) or the rear row of steel pipe piles (2), and the top ends of the angle steel are arranged at intervals with the outer walls of the front row of steel pipe piles (1) or the rear row of steel pipe piles (2).

4. The soil foundation pit steel pipe pile composite retaining structure of claim 1, further comprising a plurality of vertically arranged middle steel pipe piles (6), wherein the middle steel pipe piles (6) are arranged between the front row of steel pipe piles (1) and the rear row of steel pipe piles (2), and the top ends of the middle steel pipe piles (6) are fixedly connected with the top beam (3).

5. The soil foundation pit steel pipe pile composite retaining structure according to any one of claims 1 to 4, wherein the bottom ends of the front row of steel pipe piles (1) and the rear row of steel pipe piles (2) are both of a conical structure (7).

6. The soil foundation pit steel pipe pile composite retaining structure according to any one of claims 1 to 4, wherein the panel structure comprises a panel body (8) and a panel mesh reinforcement (9), the panel mesh reinforcement (9) is fixedly connected with the upper part of the side, away from the rear row of steel pipe piles (2), of the front row of steel pipe piles (1), and the panel body (8) is fixedly connected with the panel mesh reinforcement (9).

7. The soil foundation pit steel pipe pile composite retaining structure according to any one of claims 1 to 4, wherein the radial section where the grouting holes (4) on the front row of steel pipe piles (1) and the rear row of steel pipe piles (2) are located is a grouting section, and the number of the grouting holes (4) on each grouting section is more than two.

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