CN210263019U - Combined prefabricated pile with rib - Google Patents

Abstract

The utility model relates to a combined ribbed precast pile belongs to building pile foundation engineering technical field, for the resistance to compression of solving the stake and the low problem design of resistance to plucking bearing capacity. The utility model discloses constitute by pile body, floor and pterygoid lamina, pile body cross section be cross, the floor cross section be the L type, arrange in pile body side surface, the pterygoid lamina be circular steel sheet, link to each other with pile body and floor rigidity. The structure is simple and convenient to construct, high in engineering practicability, capable of reinforcing the soil body around the pile, capable of greatly improving the side friction resistance of the pile, high in bearing capacity and capable of being widely applied to various types of soft soil foundations.

Description

Combined prefabricated pile with rib

Technical Field

The utility model belongs to the technical field of building pile foundation engineering, concretely relates to precast pile especially relates to a combined ribbed precast pile.

Background

With the rapid development of modern building industry and the breakthrough and continuous progress of science and technology, engineering construction projects in coastal areas of China are gradually increased, and various types of soft soil strata are widely distributed in coastal areas of China, the soft soil strata have high compressibility and high water content, and the bearing capacity and the shear strength of foundations are very low, so that the construction on the foundations is easy to have large uneven settlement, which causes unstable structure damage, therefore, the original foundations need to be reinforced, and the method of driving precast piles to improve the bearing capacity is one of the more common methods. The porosity of the soft soil foundation is high, the compaction is difficult, the surface of the traditional precast pile is smooth, the effect of the pile and the surrounding soil layer is weak, the side friction resistance of the pile is difficult to exert, and the bearing capacity is low, so under the subsidy of the national natural science foundation project (number: 41372288), a combined type prefabricated pile with ribs is developed to realize the reinforcement of various types of soft soil foundations, thereby improving the bearing characteristic and reducing the uneven settlement so as to meet the actual needs of engineering.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: the combined prefabricated pile with the ribs can reinforce soil around the pile, greatly improve the side friction resistance of the pile and be widely applied to various soft soil foundations.

The utility model adopts the technical proposal that: a combined prefabricated pile with ribs mainly comprises a pile body, rib plates and wing plates; the cross section of the pile body is cross-shaped; the cross section of the rib plate is L-shaped and is arranged on the side surface of the pile body; the wing plate is a round steel plate and is rigidly connected with the pile body and the rib plate.

The utility model discloses a construction application method is: a combined prefabricated pile with ribs is made up through such technological steps as transporting it to a predefined position by a truck, binding it by steel cable and cable at a distance of 1m from top of pile, hoisting the prefabricated pile by crane to make its bottom be aligned with the center of pile position, and slowly lowering it down for inserting it in soil. The pile is inserted in the pile and the deviation of verticality is not over 0.5%, and the pile cap is fastened to the top of the pile, so that the rigging can be removed. After the bottom end of the pile is inserted into the pile position, the pile is hammered for one time and the other time by a low hammer, and after the pile is embedded into the soil to a certain depth, the pile is vertically stable. When in piling, the heavy hammer is adopted to carry out low-impact and low-lifting-weight driving, the heavy hammer is selected according to geological conditions, pile structures and construction conditions, and after the precast pile is driven into the designed elevation of the foundation, the pile driver is removed to complete the construction.

The utility model discloses a theory of operation is: the cross section of the pile body of the combined prefabricated pile with the ribs is cross-shaped, so that the contact area between the pile body and the surrounding soil body is increased, and the stress is uniform, so that the bearing capacity of the pile body is improved; the ribbed plates are arranged on the side surface of the pile body, so that the lateral displacement of the pile body is limited, the pile body is reinforced, the horizontal bearing capacity of the pile body is improved, the smoothness of the side surface of the pile body is reduced, and the side frictional resistance of the pile is increased; the wing plates are rigidly connected with the pile body and the rib plates, so that loads transmitted by the wing plates and the pile body can be transmitted to soil bodies, the soil bodies around the pile body bear more loads, the load of the pile body is reduced, the variable cross section of the pile body is realized due to the wing plates, the contact area with the surrounding soil bodies is increased, and the uplift resistance of the pile body is improved. The method for adjusting the verticality of the pile is to observe the pile from the front and the side by two hanging hammers in a direction of 90 degrees, so that the verticality deviation after the pile is buried is not more than the national standard allowable range, namely the verticality deviation is controlled within 0.5 percent. In the piling process, two persons can observe the front and the side surfaces at any time, if the inclination is found, the inclination can be immediately adjusted, and the verticality deviation after piling is not larger than the national standard allowable range.

The utility model has the advantages that: the cross section of the pile body of the combined prefabricated pile with the ribs is cross-shaped, so that the material is saved, the cost is reduced, the area of the cross section is smaller, the pile can be driven into a soil body more easily, and the construction is convenient; the side surface of the pile body is provided with the rib plate, so that the stress concentration phenomenon at the joint of the pile body and the wing plate can be avoided, and a part of load can be shared, thereby improving the bearing capacity of the pile body; the existence of the wing plates can ensure that the load transmitted by the pile body and the rib plates can be uniformly transmitted to the bottom end of the pile and can also be transmitted to the soil body around the pile body, the pile body and the rib plates between the wing plates are embedded and fixed with the surrounding soil body, so that the stress of the pile body is coordinated with the stress of the soil body, and the stability and the compression resistance of the pile foundation are improved.

Drawings

Fig. 1 is a schematic view of the combined prefabricated pile with ribs of the present invention.

Reference numerals: 1-pile body; 2-a rib plate; 3-wing plate.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, a combined prefabricated pile with ribs mainly comprises a pile body 1, rib plates 2 and wing plates 3; the cross section of the pile body 1 is cross-shaped; the cross section of the rib plate 2 is L-shaped and is arranged on the side surface of the pile body 1; the wing plate 3 is a round steel plate and is rigidly connected with the pile body 1 and the ribbed plate 2.

When the prefabricated cross ribbed pile is formed, the prefabricated cross ribbed pile is prefabricated in a factory according to the length and the diameter of the pile required on site, and all parts of the prefabricated pile are welded or integrally formed so as to have enough strength.

During construction, the prefabricated pile is transported to a specified position by a transport vehicle, then the prefabricated pile is firmly bound by a steel wire rope and a rigging at a position about 1m away from the top end of the pile, a crane is started to hoist the prefabricated pile, the bottom end of the pile is aligned to the center of the pile position, and the prefabricated pile is slowly put down and inserted into the soil. The pile is inserted in the pile and the deviation of verticality is not over 0.5%, and the pile cap is fastened to the top of the pile, so that the rigging can be removed. After the bottom end of the pile is inserted into the pile position, the pile is hammered for one time and the other time by a low hammer, and after the pile is embedded into the soil to a certain depth, the pile is vertically stable. When in piling, the heavy hammer is adopted to carry out low-impact and low-lifting-weight driving, the heavy hammer is selected according to geological conditions, pile structures and construction conditions, and after the precast pile is driven into the designed elevation of the foundation, the pile driver is removed to complete the construction.

Claims (1)

1. A combined prefabricated pile with ribs mainly comprises a pile body, rib plates and wing plates; the cross section of the pile body is cross-shaped; the cross section of the rib plate is L-shaped and is arranged on the side surface of the pile body; the wing plate is a round steel plate and is rigidly connected with the pile body and the rib plate.

Images