Resistance-increasing square pile and construction method thereof
阅读说明：本技术 一种增阻方桩及其施工方法 (Resistance-increasing square pile and construction method thereof ) 是由 梁俊 戴国亮 梁梦琦 曾少雷 何百川 于 2019-11-08 设计创作，主要内容包括：本发明公开了一种增阻方桩,包括混凝土的长方形桩体,所述长方形桩体内设有圆柱形内腔,所述长方形桩体的四个侧面上沿桩体轴向均设有一组条形凹槽,桩体上相邻侧面上的条形凹槽互相错位设置。利用所述增阻方桩的施工方法,包括以下步骤：1)在施工位置钻孔；2)钻孔达到设计深度后,向孔内注入水泥浆,使水泥浆与钻孔产生的土形成水泥土；3)把方桩吊装入孔内,利用桩体自重进行沉桩。其提高桩土之间的粘结性能,增大侧摩阻力。(The invention discloses a resistance-increasing square pile which comprises a concrete rectangular pile body, wherein a cylindrical inner cavity is arranged in the rectangular pile body, a group of strip-shaped grooves are formed in four side surfaces of the rectangular pile body along the axial direction of the pile body, and the strip-shaped grooves in the adjacent side surfaces of the pile body are arranged in a staggered mode. The construction method using the resistance-increasing square pile comprises the following steps: 1) drilling a hole at the construction position; 2) after the drill hole reaches the designed depth, injecting cement slurry into the hole, so that the cement slurry and soil generated by the drill hole form cement soil; 3) the square pile is hung in the hole, and pile sinking is carried out by utilizing the dead weight of the pile body. It can improve the adhesion between piles and earth and increase the side friction resistance.)
1. The utility model provides a resistance-increasing square pile, includes the rectangular pile body of concrete, be equipped with cylindrical inner chamber, its characterized in that in the rectangular pile body: a group of strip-shaped grooves are formed in four side faces of the rectangular pile body along the axial direction of the pile body, and the strip-shaped grooves in the adjacent side faces of the pile body are arranged in a staggered mode.
2. The resistance-increasing square pile according to claim 1, wherein: the bottom of the strip-shaped groove on the pile body is of an arc-shaped structure.
3. The resistance-increasing square pile according to claim 1, wherein: and a group of strip-shaped grooves on the side surface of the pile body are uniformly arranged.
4. The resistance-increasing square pile according to claim 3, wherein: the distance between the strip-shaped grooves on the same side face of the pile body is 80-120 cm.
5. The resistance-increasing square pile according to claim 1, wherein: the depth of the strip-shaped groove on the side face of the pile body is 1.2-1.8 cm.
6. The resistance-increasing square pile according to claim 1, wherein: and a reinforcement cage is arranged inside the rectangular pile body.
7. The resistance-increasing square pile according to claim 3, wherein: the staggered distance of the strip-shaped grooves on the adjacent side surfaces of the pile body is 1/2 of the distance between the adjacent strip-shaped grooves on the same side surface.
8. A construction method using the resistance-increasing square pile according to any one of claims 1 to 7, characterized in that: the construction method comprises the following steps:
1) drilling a hole at the construction position;
2) after the drill hole reaches the designed depth, injecting cement slurry into the hole, so that the cement slurry and soil generated by the drill hole form cement soil;
3) the square pile is hung in the hole, and pile sinking is carried out by utilizing the dead weight of the pile body.
Technical Field
The invention relates to the technical field of square piles, in particular to a resistance-increasing square pile and a construction method thereof.
Background
The existing uplift pile with ribs mainly takes a pipe pile as a basic pile type, and resistance-increasing ribs are basically of an outward convex type, although the pile type can increase side friction resistance, the traditional static pressure and hammering mode is adopted for pile sinking, the sinking resistance is too large, not only great difficulty is brought to construction, but also accidents such as pile head bursting, pile body concrete cracking and the like can occur, and hidden troubles are caused to the working performance of uplift pile resistance.
The inward-concave type resistance-increasing rib centrifugal square pile is a novel resistance-increasing pile, compared with a ribbed tubular pile, the contact area between the pile side and a soil body is effectively increased, the side friction resistance is improved, the concrete consumption is reduced, in addition, because of the inward concave of the resistance-increasing rib, the surface of the pile body is smooth, the traditional static pressure is used, the resistance received by an outward convex pile type in the pile sinking process in a hammering mode is smaller, and experiments show that the pile type has a good bearing effect in sandy soil. Even so, this stake type uses static pressure or hammering mode pile sinking also very easily to take place accident such as disconnected stake and pile wall destruction, and the soil body because the crowded dense effect in the pile sinking process, can't get into in the indent rib groove of pile body completely, leads to the stake soil contact to reach the optimum state, and the side friction resistance has received the weakening of certain degree.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a resistance-increasing square pile and a construction method thereof, which improve the bonding property between pile soils and increase the side friction resistance.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a resistance-increasing square pile, includes the rectangular pile body of concrete, be equipped with cylindrical inner chamber in the rectangular pile body, all be equipped with a set of bar recess along the pile body axial on four sides of rectangular pile body, the bar recess dislocation set mutually on the adjacent side on the pile body.
The bottom of the strip-shaped groove on the pile body is of an arc-shaped structure.
And a group of strip-shaped grooves on the side surface of the pile body are uniformly arranged.
The distance between the strip-shaped grooves on the same side face of the pile body is 80-120 cm.
The depth of the strip-shaped groove on the side face of the pile body is 1.2-1.8 cm.
And a reinforcement cage is arranged inside the rectangular pile body.
The staggered distance of the strip-shaped grooves on the adjacent side surfaces of the pile body is 1/2 of the distance between the adjacent strip-shaped grooves on the same side surface.
A construction method using the resistance-increasing square pile comprises the following steps:
1) drilling a hole at the construction position;
2) after the drill hole reaches the designed depth, injecting cement slurry into the hole, so that the cement slurry and soil generated by the drill hole form cement soil;
3) the square pile is hung in the hole, and pile sinking is carried out by utilizing the dead weight of the pile body.
Compared with the prior art, the invention has the following advantages:
the resistance-increasing square pile and the construction method thereof have reasonable design, the strip-shaped grooves on different sides are arranged in a staggered manner, the problem of concrete ring cracking at the inner groove during pile driving is avoided, and the defects of noise pollution, oil splashing pollution, vibration pollution, soil squeezing effect, breakage and crack hidden danger of the square pile head and the pile wall caused by hammering and static pressure construction, pile wall concrete prestress loss hidden danger caused by pile head breakage and the like in the prior art are effectively avoided.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
fig. 1 is a schematic view of a square pile structure according to the present invention.
Fig. 2 is a partial schematic view of a square pile according to the present invention.
FIG. 3 is a schematic view of the construction process of the present invention.
In the figure:
1. rectangular pile body, 2. cylindrical cavity, 3. bar recess.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the resistance-increasing square pile comprises a concrete
The bottom of the strip-shaped groove on the pile body is of an arc-shaped structure; the depth of the strip-shaped groove on the side surface of the pile body is 1.2-1.8 cm.
A group of strip-shaped grooves on the side surface of the pile body are uniformly arranged; the distance between the strip-shaped grooves on the same side surface of the pile body is 80-120 cm. The staggered distance of the strip-shaped grooves on the adjacent side surfaces of the pile body is 1/2 of the distance between the adjacent strip-shaped grooves on the same side surface.
The construction method using the resistance-increasing square pile comprises the following steps:
1) drilling a hole at the construction position;
2) after the drill hole reaches the designed depth, injecting cement slurry into the hole, so that the cement slurry and soil generated by the drill hole form cement soil;
3) the square pile is hung in the hole, and pile sinking is carried out by utilizing the dead weight of the pile body.
Different side bar recess dislocation set, the concrete ring that inner groovy department produced when avoiding driving a pile splits the problem, has effectively avoided adopting among the prior art hammering and the produced noise pollution of static pressure mode construction, oil splash pollution, vibration pollution, crowded soil effect, because of the fracture and the crackle hidden danger of square pile head and pile wall that the hammering caused, because of the pile head shortcomings such as pile wall concrete prestressing force loss hidden danger that broken pile caused.
Preferred specific examples are:
the inward-concave type resistance-increasing rib centrifugal square pile comprises a centrifugal square pile body formed by concrete, wherein the pile body is of a hollow cuboid structure, a cylindrical inner cavity is arranged in the pile body, and a strip-shaped groove is formed in the surface of the pile body.
The strip-shaped grooves are evenly distributed along the axial direction of the pile body, and the strip-shaped grooves on the adjacent side faces of the pile body are staggered mutually, so that the problem of concrete annular cracking at the position of the concave rib during pile driving is solved. The contact area of the pile soil is increased, and the side friction resistance is improved.
The distance between the strip-
The staggered distance of the strip-shaped grooves on the adjacent side surfaces of the pile body is preferably equal to the distance between the 1/2 inner
The bar groove gets into the pile body degree of depth and is 1.5cm, the unable full play recess of degree of depth that is too shallow increases resistance, it is too deep to get into the pile body, can reduce the protective layer of groove department steel reinforcement cage, influence the combined action of concrete and steel reinforcement cage, and weakened the pile body corrosion protection ability, the work hidden danger of increase pile body, adopt 1.5 cm's entering degree of depth, the bearing capacity of pile body has both been increased, sufficient concrete protection layer has been reserved for the steel reinforcement cage again, the anticorrosion and the working property of pile body have been guaranteed.
The construction method of the square pile comprises the following steps:
prefabricating resistance-increasing square piles;
drilling at a construction position:
the hole diameter of the drilled hole is slightly larger than the length of the diagonal line of the cross section of the internally concave resistance-increasing rib centrifugal square pile, preferably, the hole diameter of the drilled hole is preferably 1.5-1.8 times of the side length of the cross section of the pile body, so that the pile body can be ensured to be smoothly sunk into a soil body, and the bonding property of the pile and cement soil can be ensured under the condition of controlling the using amount of cement slurry;
after the drill hole reaches the designed depth, injecting cement slurry into the hole, so that the cement slurry and soil generated by the drill hole form cement soil; lifting the drill hole to spray cement after the drill hole reaches the designed depth, and injecting cement slurry with the ratio of 1:1 into the hole through an injector in the drill pulling process to enable the cement slurry and soil generated by the drill hole to form cement soil;
hoisting a prefabricated resistance-increasing anti-pulling centrifugal square pile into the hole, and sinking the pile by using the self weight of the pile body; the pile sinking method is adopted to fill so that the cement soil can be fully contacted with the inward-concave ribs, and the side friction resistance of the pile body is fully exerted; effectively improve the side frictional resistance and the ultimate bearing capacity of the pile body.
The construction noise pollution, oil splash pollution, vibrations pollution, crowded native effect that cause under can avoiding the external force pile sinking mode and because of the fracture and the crackle hidden danger of the square pile head that the hammering caused, because of shortcomings such as pile wall concrete prestressing force hidden danger that pile head broken caused, simultaneously, at pile sinking in-process, cement soil can get into the interior indent rib groove of pile side completely, utilize its high bonding performance with the pile to exert the side frictional resistance of this pile type completely to reach the purpose that improves bearing effect.
The above-mentioned features are merely for describing preferred embodiments of the present invention and may be arbitrarily combined to form a plurality of embodiments of the present invention.
The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
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