阅读说明：本技术 一种兼作降水井的管桩结构 (Pipe pile structure used as dewatering well ) 是由 王贤军 张中华 卢海林 于 2018-06-04 设计创作，主要内容包括：本发明公开了一种兼作降水井的管桩结构,包括置于地面钻孔中的竖向管桩和置于管桩内的潜水泵及附件。其中,置于地面钻孔中的竖向管桩,用于承载和兼作降水井井筒；置于管桩内的潜水泵及附件,用于抽出汇流到管井内的水到地上指定排水点,降低地下水位。竖向管桩包括地面钻孔和钢管桩,置于管桩内的潜水泵及附件包括潜水泵、吊索和水管。本发明结构简单,施工速度快,管桩兼具承载和降水井的双重作用。(The invention discloses a pipe pile structure used as a dewatering well, which comprises a vertical pipe pile arranged in a ground drilled hole, a submersible pump arranged in the pipe pile and accessories. Wherein, the vertical pipe pile arranged in the ground drilling hole is used for bearing and also used as a dewatering well shaft; and the submersible pump and the accessories are arranged in the tubular pile and used for pumping water converged into the tubular well to a designated ground drainage point and reducing the underground water level. The vertical tubular pile comprises a ground drilling hole and a steel pipe pile, and the submersible pump and accessories arranged in the tubular pile comprise a submersible pump, a sling and a water pipe. The invention has simple structure and high construction speed, and the pipe pile has the double functions of bearing and dewatering well.)

1. A tubular pile structure used as a dewatering well is characterized by comprising a vertical tubular pile arranged in a ground drilled hole, a submersible pump arranged in the tubular pile and accessories; wherein the content of the first and second substances,

The vertical tubular pile arranged in the ground drilling hole is used for bearing and also used as a dewatering well shaft;

The submersible pump and the accessories arranged in the tubular pile are used for pumping water converged into the tubular well to a designated ground drainage point and reducing the underground water level.

2. the tubular pile structure of claim 1, wherein the vertical steel tubular pile placed in the ground bore hole comprises a ground bore hole and a steel tubular pile, the ground bore hole is vertical, the bore hole diameter is greater than the outer diameter of the tubular pile by 20-60 mm, the bore hole depth exceeds the designed base, the bore hole depth exceeds the base depth and equals to the length of a submersible pump plus 1000-2000 mm plus the height of a filter material at the bottom of the well (if any), the vertical tubular pile adopts a welded steel tube or a seamless steel tube, the tubular pile is installed in the ground bore hole, the bottom surface of the tubular pile is welded with a sealing plate, the sealing plate adopts a steel plate, the bottom of the tubular pile is seated at the bottom of the bore hole, the tubular pile is provided with a water filtering hole below the base, the shape of the water filtering hole on the tubular pile is a circular hole or a vertical long hole, the diameter of the water filtering hole on the tubular pile is, the upper part of the tubular pile exceeds the ground or the structural plane of the part where the tubular pile is located by 100-500 mm.

3. The tubular pile structure of claim 1, wherein the submersible pump and the accessories arranged in the tubular pile comprise a submersible pump, a sling and a water pipe, the outer diameter of the submersible pump is smaller than the nominal diameter of a steel pipe used by the tubular pile by one grade or more, the pump lift of the submersible pump exceeds the height from the pump bottom to a water outlet pipe port by more than 1000mm, the upper part of the submersible pump is fixed to a well head by the sling, the bottom of the submersible pump is suspended, the suspended height of the bottom of the submersible pump is 500 mm-1000 mm away from the hole bottom or the top surface of a filter material, the sling adopts a steel wire rope, a hemp rope or a nylon rope, the water pipe adopts a steel pipe, a plastic pipe or a rubber pipe, the lower part of the water pipe is connected to a water.

Technical Field

The invention relates to the technical field of building construction, in particular to a dewatering well and a supporting or supporting pile structure of building underground structural engineering, and specifically relates to a tubular pile structure serving as a dewatering well.

Background

In the construction of underground structure engineering, when the foundation pit has poor geology, no slope condition is arranged at the periphery, the underground water level is high, the water quantity is large and the soil permeability is good, before the foundation pit is excavated, the water is generally reduced for more than 15 days in advance, and when the underground water level in the foundation pit is reduced to be more than 500mm below the substrate, the earthwork excavation can be carried out; in the process of excavation of the foundation pit, before the foundation pit is excavated to ensure the safety of the side slope of the foundation pit, supporting piles are constructed on the periphery of the foundation pit; when the underground structure adopts a reverse construction method and a local structure needs to be supported temporarily in the construction process, a supporting pile needs to be arranged.

Disclosure of Invention

The invention aims to solve the technical problems that a dewatering well and a support or supporting pile are independently arranged respectively in the construction underground structural engineering, the construction period is long, and the quality is unstable, and provides a tubular pile structure which is simple in structure, high in construction speed and has double functions of bearing and dewatering well.

The purpose of the invention is realized by the following technical scheme:

A tubular pile structure used as a dewatering well comprises a vertical tubular pile arranged in a ground drilled hole, a submersible pump arranged in the tubular pile and accessories; wherein the content of the first and second substances,

the vertical tubular pile arranged in the ground drilling hole is used for bearing and also used as a dewatering well shaft;

The submersible pump and the accessories arranged in the tubular pile are used for pumping water converged into the tubular well to a designated ground drainage point and reducing the underground water level.

The vertical tubular pile arranged in the ground drilling hole comprises a ground drilling hole and a steel pipe pile, the ground drilling hole is vertical to the ground, the diameter of the drilled hole is 20-60 mm larger than the outer diameter of the tubular pile, the depth of the drilled hole exceeds the designed substrate, the depth of the drill hole exceeding the substrate is equal to the length of the submersible pump plus 1000 mm-2000 mm plus the height of the filter material at the bottom of the well (if so), the vertical tubular pile adopts a welded steel pipe or a seamless steel pipe, the tubular pile is arranged in a ground drilled hole, the bottom surface of the tubular pile is welded with a sealing plate which is made of steel plates, the bottom of the tubular pile is seated at the bottom of the drilling hole, the tubular pile is provided with water filtering holes below the substrate, the water filtering holes on the tubular pile are round holes or vertical strip holes, the aperture of the water filtering holes on the tubular pile is 10 mm-20 mm, the number of the water filtering holes on the tubular pile is determined according to the required water filtering area, the upper part of the tubular pile exceeds the ground or the structural plane of the part where the tubular pile is located by 100-500 mm.

Immersible pump and annex in arranging the tubular pile in include immersible pump, hoist cable and water pipe, the immersible pump external diameter is less than the used steel pipe nominal diameter of tubular pile one grade or more than one grade, immersible pump lift should exceed at the bottom of the pump more than outlet pipe mouth height 1000mm, immersible pump upper portion is fixed to the well head with the hoist cable, immersible pump bottom is unsettled, immersible pump bottom unsettled height apart from the hole bottom or filter material top surface 500mm ~ 1000mm, the hoist cable adopts wire rope, hemp rope or nylon rope, the water pipe adopts steel pipe, plastic tubing or rubber tube, the water pipe sub-unit connection is on the outlet of a pump, the appointed drainage point on ground is installed to water.

the invention has the advantages and economic effects that:

The invention has simple structure and high construction speed, and the tubular pile structure has the double functions of bearing and dewatering well, thus greatly shortening the construction period and reducing the cost;

The invention adopts dry operation, has little environmental pollution, adopts steel pipes as the tubular pile, has regular appearance and high strength, is not easy to be damaged, does not need maintenance, and can shorten the total construction period;

And thirdly, the materials, the equipment, the construction equipment and the construction method related to the invention are relatively common, and the operation is convenient, thereby being beneficial to popularization.

Drawings

FIG. 1 is a schematic elevation section view of the present invention;

FIG. 2 is a structural profile view of the present invention;

FIG. 3 is a schematic view of the vertical section of the pile of the present invention in use as a support pile;

Fig. 4 is a schematic elevation sectional view showing the state of use of the present invention as a support pile.

In the figure: 1: soil body, 2: a closing plate, 3: submersible pump, 4: water filtration pore, 5: tubular pile, 6: sling, 7: drilling, 8: water pipe, 9: crown beam, 10: enclosing purlin, 11: structural body

Detailed Description

For a further understanding of the contents, features and effects of the present invention, reference will now be made to the following examples, which are to be considered in conjunction with the accompanying drawings. It should be noted that the present embodiment is illustrative, not restrictive, and the scope of the invention should not be limited thereby.

as shown in fig. 1, the embodiment discloses a pipe pile structure doubling as a dewatering well, which comprises a vertical pipe pile 5 arranged in a ground drilling hole 7, a submersible pump 3 arranged in the pipe pile 5 and accessories. Referring to fig. 1 and 2, a drill hole 7 is drilled in a soil body 1 on the ground according to a positioning drill, a tubular pile 5 is arranged in the drill hole 7, a sealing plate 2 is welded at the bottom of the tubular pile 5, a water filtering hole 4 is formed in the lower portion of the tubular pile 5, a submersible pump 3 is arranged in the tubular pile 5, the submersible pump 3 is suspended in the tubular pile 5 through a sling 6 fixed on a wellhead, and a water pipe 7 is connected to a water outlet of the submersible pump 3.

In the embodiment shown in fig. 3, the method of the invention is that the groundwater in the soil body 1 is converged into the pipe pile 5 as the dewatering well through the water filtering hole 4, the groundwater is discharged through the submersible pump 3 and the water pipe 7, thereby reducing the groundwater level; in the excavation process of the foundation pit, the tubular piles 5 and other piles form a row pile structure through the crown beams 9 and the surrounding purlins 10 to support the foundation pit.

In the embodiment shown in fig. 4, the method of the invention is that the groundwater in the soil body 1 is converged into the pipe pile 5 as the dewatering well through the water filtering hole 4, the groundwater is discharged through the submersible pump 3 and the water pipe 7, thereby reducing the groundwater level; in the process of constructing a structure, a structure 11 to be supported is connected to the pipe pile 5, and the pipe pile 5 supports the structure 11 as a support pile.

although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.