CN219410886U - Light combined upright post structure for water area foundation pit engineering - Google Patents

Abstract

The utility model belongs to the field of building structure combined column construction, and provides a light combined column structure for water area foundation pit engineering, which comprises a drill hole, at least three steel pipes, a supporting plate and an inner support, wherein the drill hole is positioned on a river bed, the bottom end of each steel pipe is fixedly inserted into the drill hole, the top end of each steel pipe rises to a designed elevation, the supporting plate is fixedly arranged at the top end of each steel pipe, and the inner support is fixedly erected on the supporting plate. The steel pipe, the supporting plate and the inner support in the light combined upright post structure can finish construction before the cofferdam is pumped, so that the foundation pit support can be ensured to be under the guarantee of an inner support system, cofferdam pumping construction and subsequent foundation pit excavation construction are carried out, and waste caused by a large amount of work such as earth backfilling, excavation, building construction channels and the like in the pit is avoided.

Description

Light combined upright post structure for water area foundation pit engineering

Technical Field

The utility model belongs to the field of building structure combined column structures, and particularly relates to a light combined column structure for water area foundation pit engineering.

Background

With the national emphasis on the water body treatment field, the foundation pit engineering in the water area is rapidly developed year by year. In the water-critical pit engineering such as open channel widening, when an internal support supporting system is needed, a vertical supporting structure is needed to be arranged within the supporting span range to ensure the stability of the whole structure due to the large supporting span. During column construction, the water area cofferdam in the foundation pit range is pumped down, a construction channel is constructed, a large pile foundation pore-forming machine is conveyed to the bottom of a river bed or a channel, then drilling construction is carried out at the bottom, steel columns and steel reinforcement cages are inserted, concrete is poured, and a horizontal support system is erected.

However, before the cofferdam is pumped, because the upright post piles and the internal support cannot be constructed, the water pressure in the pit is reduced in the pumping process, and the supporting system is possibly unstable, under the condition, a large amount of earth backfill back pressure is carried out in the pit before the water is pumped, the water is pumped again, the back pressure soil body is excavated after the construction of the upright posts, the upright post piles and the supporting system is finished, the construction process is complex, and great engineering waste is brought in the aspects of construction period, manufacturing cost, environmental protection and the like.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a light combined upright post structure for water area foundation pit engineering, and the steel pipe, the supporting plate and the inner support in the structure can finish construction before cofferdam pumping, so that the foundation pit support can be ensured to perform cofferdam pumping construction and subsequent foundation pit excavation construction under the guarantee of an inner support system, and the waste caused by a large amount of work such as earth backfilling, digging and transporting, construction and passageway construction in a pit is avoided.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a light-duty combination stand structure in being arranged in waters foundation ditch engineering, is including being located drilling, at least three steel pipes, layer board, the internal support on the riverbed, steel pipe bottom mounting alternates in the drilling, steel pipe top rises out the water surface to design elevation, the layer board fixed set up in the steel pipe top, the internal support is fixed to be erect on the layer board.

Preferably, the steel pipe is fixedly connected with the steel pipe to form a combined steel frame system.

Preferably, the angle steel is welded and fixed with the steel pipe.

Preferably, the angle steel is equal-limb angle steel.

Preferably, the steel pipe is filled with cement.

Preferably, the cement is filled between the outer side wall of the steel pipe and the inner side wall of the drill hole.

Preferably, the pallet is welded to the steel pipe.

Preferably, the side surface of the supporting plate is of a triangular structure.

Compared with the prior art, the utility model has the beneficial effects that:

1. the light combined upright post structure for the water area foundation pit engineering provided by the utility model has the advantages that the construction of the steel pipes, the supporting plates and the inner supports in the structure can be completed before the cofferdam is pumped, so that the foundation pit support can be ensured to be under the guarantee of an inner support system, the cofferdam pumping construction and the subsequent foundation pit excavation construction are carried out, and the waste caused by a large amount of earthwork backfilling, digging, building construction channels and the like in the pit is avoided.

2. The light combined upright post structure for the water area foundation pit engineering, provided by the utility model, does not need large equipment to implement, can adopt small geological drilling equipment for construction on water, is more flexible and portable, and greatly simplifies construction and management difficulty.

Drawings

FIG. 1 is a schematic diagram of a structure for drilling holes in a column using a small geological drilling rig secured to a bamboo raft in an embodiment of the present utility model;

FIG. 2 is a schematic side view of a light combined column structure for use in foundation pit engineering in water areas according to an embodiment of the present utility model;

fig. 3 is a schematic top view of a light combined column structure for use in a water foundation pit engineering according to an embodiment of the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. a small geological drilling rig secured to the bamboo raft; 2. drilling holes; 3. angle steel; 4. a steel pipe; 5. a supporting plate; 6. an inner support; 7. cement; 8. a sleeve.

Detailed Description

The present utility model will be described in further detail with reference to specific examples so as to more clearly understand the present utility model by those skilled in the art.

It should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, unless otherwise specifically indicated and defined. The specific meaning of such terms in this patent will be understood by those of ordinary skill in the art as the case may be.

As shown in fig. 2, the light combined column structure for foundation pit engineering in a water area provided by the embodiment comprises a drill hole 2, four steel pipes 4, a supporting plate 5 and an inner support 6, wherein the drill hole 2 is positioned on a river bed, the bottom end of the steel pipe 4 is fixedly inserted into the drill hole 2, the top end of the steel pipe 4 is lifted to reach a designed elevation, the supporting plate 5 is fixedly arranged at the top end of the steel pipe 4, and the inner support 6 is fixedly erected on the supporting plate 5.

In this embodiment, the drill hole 2, the steel pipe 4, the supporting plate 5 and the inner support 6 may be constructed before the cofferdam is pumped. This is because the steel pipe 4 may be a miniature steel pipe, which has a small weight, does not require a large-scale hoisting, and has a small size, and the corresponding borehole 2 has a small size, so that the small geological drilling rig 1 fixed on the bamboo raft may be used to drill the river bed. Four steel pipes 4 can be used as a group, four corresponding drill holes 2 can be arranged in a matrix, as shown in fig. 3, four steel pipes 4 are respectively located at four corners of a rectangle, then the top ends of the steel pipes 4 are fixedly provided with supporting plates 5, the supporting plates 5 can be used for erecting the inner support 6, namely, the construction of an upright column and the erection of an inner support system can be completed, and then cofferdam pumping, foundation pit excavation and subsequent construction in a foundation pit range are carried out.

In order to enhance the overall stability of the four steel pipes 4, please refer to fig. 2 again, in this embodiment, the steel pipe further includes an angle steel 3, the angle steel 3 may be welded to the steel pipes 4, and the angle steel 3 may be an equal angle steel.

The angle steel 3 can fix adjacent steel pipes 4 together to form a combined steel frame system. The angle steel 3 can be horizontally arranged or obliquely arranged and is mainly used for enhancing the overall stability of the four steel pipes 4.

In order to improve the strength and stability of the steel pipe 4, in this embodiment, the steel pipe 4 may be filled with cement 7. The cement 7 can also be filled between the outer side wall of the steel pipe 4 and the inner side wall of the borehole 2.

Specifically, after the steel pipe 4 is lowered in the borehole 2, cement slurry is injected to fill the gaps in the steel pipe 4 and between the steel pipe 4 and the borehole 2. The strength and stability of the steel pipe 4 can be further improved.

In this embodiment, the supporting plate 5 and the steel pipe 4 may be welded and fixed. The side surface of the supporting plate 5 can be in a triangular structure. The top surface of the supporting plate 5 is a right-angle side of a triangular structure, so that the supporting area can be effectively increased and used for supporting the inner support 6, and the erection stability of the inner support 6 is improved.

In summary, the light combined upright post structure for use in a water area foundation pit engineering provided in this embodiment, as shown in fig. 1, may include the following specific construction processes:

s1, firstly, a sleeve 8 is lowered for water isolation, namely, the bottom of the sleeve 8 is inserted into a riverbed, the top end of the sleeve 8 extends to the water surface, and then, a small geological drilling device 1 fixed on a bamboo raft is utilized to drill holes at the position of a pre-designed upright post through the sleeve 8;

s2, after the holes are drilled, the steel pipe 4 is lowered in the drill hole 2, the top end of the steel pipe 4 rises to the designed elevation from the water surface, then cement slurry is used for grouting to fill gaps in the steel pipe 4 and between the steel pipe 4 and the drill hole 2, and the steel pipe 4 is fixed;

s3, after a group (typically three to four) of steel pipes 4 are constructed, adopting angle steel 3 and steel pipes 4 to weld and fix to form a combined steel frame system, so that the stability of the steel pipes 4 is improved;

s4, welding a supporting plate 5 for supporting on the top end of the steel pipe 4;

and S5, after the construction of all the light combined upright posts is finished, erecting an inner support 6 on the supporting plate 5, and then carrying out cofferdam pumping, foundation pit excavation and subsequent construction in the foundation pit range.

Therefore, the light-duty combination stand column structure for in waters foundation ditch engineering that this embodiment provided can be before carrying out cofferdam and draw water, with stand construction and interior braced system's erection work completion, under the support that the foundation ditch was strutted to have interior braced system, directly carry out cofferdam construction and follow-up foundation ditch excavation construction, avoided in the traditional engineering: the method is characterized in that a great amount of earthwork backfill, a great amount of slurry and earthwork outward transportation generated in the pore-forming process and engineering waste caused by repeated excavation and transportation of the backfill in the earlier stage after the upright post is completed are required to be carried out before pumping water. The construction process is greatly simplified, the construction period is shortened, the construction cost is saved, and the method is green, low-carbon and environment-friendly.

Moreover, the column structure adopted in the traditional engineering is required to be subjected to column pile foundation pore-forming, and a concrete pouring process is performed after the section steel column and the steel reinforcement cage are inserted, so that the consumption of steel reinforcement and concrete materials is large, the weight of a single concrete column is large, large-scale equipment is required for hoisting, and the construction process is complex and long in construction period. In the embodiment, holes can be formed by only adopting small geological drilling equipment fixed on the bamboo raft, the upright posts adopt a miniature steel pipe combined structure, the construction and hoisting equipment is flexible and portable, the material consumption is saved, the construction and management difficulty is greatly simplified, and the device is more flexible and portable.

Mechanisms, components, and members not described in the specific structure of the present utility model are all existing structures already existing in the prior art. Can be purchased directly from the market.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

The foregoing is merely a preferred embodiment of the present utility model, and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. The utility model provides a light-duty combination stand structure for in waters foundation ditch engineering, its characterized in that, including drilling (2), at least three steel pipe (4), layer board (5), interior support (6) that are located the riverbed, steel pipe (4) bottom mounting alternates in drilling (2), steel pipe (4) top rise the water surface to design elevation, layer board (5) fixed set up in steel pipe (4) top, interior support (6) are fixed to be erect on layer board (5).

2. The light combined column structure for water foundation pit engineering according to claim 1, further comprising angle steel (3), wherein the angle steel (3) and the steel pipe (4) are fixedly connected together to form a combined steel frame system.

3. A lightweight composite column structure for use in water foundation pit engineering according to claim 2, wherein said angle steel (3) is welded to said steel pipe (4).

4. A lightweight composite post structure for use in water foundation pit engineering according to claim 2, wherein the angle steel (3) is an equal limb angle steel.

5. A lightweight composite column structure for use in water foundation pit engineering according to claim 1, wherein the steel pipe (4) is filled with cement (7).

6. A lightweight composite column structure for use in water foundation pit engineering according to claim 5, wherein the cement (7) is filled between the outer side wall of the steel pipe (4) and the inner side wall of the borehole (2).

7. A lightweight composite column structure for use in water foundation pit engineering according to claim 1, wherein the pallet (5) is welded to the steel pipe (4).

8. A lightweight composite column structure for use in water foundation pit engineering according to claim 1, wherein the side of the pallet (5) is triangular.