CN211057782U

CN211057782U - Prestressed pipe pile composite foundation

Info

Publication number: CN211057782U
Application number: CN201921630671.0U
Authority: CN
Inventors: 罗东林; 李耀家
Original assignee: CREEC Chengdu Survey Design and Research Co Ltd
Current assignee: CREEC Chengdu Survey Design and Research Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-07-21
Anticipated expiration: 2029-09-27

Abstract

The utility model belongs to the technical field of composite foundation, a composite foundation of prestressing force tubular pile is disclosed, the prestressing force tubular pile in order to solve current composite foundation has had full play bearing capacity, the soil body still does not full play bearing capacity make prestressing force tubular pile atress too big and have the problem of potential safety hazard. The utility model discloses an at least prestressed pipe pile in arranging the soil body in, prestressed pipe pile's top is provided with the mattress layer that is used for bearing the weight of building foundation, prestressed pipe pile's top is provided with the harmonious layer of modulus, perhaps the upper surface of the soil body highly is higher than prestressed pipe pile's upper surface height. The utility model discloses in the use, the soil body subsides earlier after a certain amount soil body and prestressing force tubular pile subsides together again, and then makes the settlement volume of the soil body be greater than with the settlement volume of prestressing force tubular pile, the bearing capacity of full play soil body to eliminate because the too big potential safety hazard that brings of prestressing force tubular pile atress.

Description

Prestressed pipe pile composite foundation

Technical Field

The utility model belongs to the technical field of composite foundation, concretely relates to composite foundation of prestressing force tubular pile.

Background

The composite foundation refers to a natural foundation in which a part of soil is reinforced or replaced in the foundation treatment process, or a reinforcement material is arranged in the natural foundation, and the reinforcement area is an artificial foundation consisting of a matrix (natural foundation soil or improved natural foundation soil) and a reinforcement. Under the action of load, the matrix and the reinforcement body jointly bear the load. The composite foundation is divided into a vertical reinforcement composite foundation and a horizontal reinforcement composite foundation according to a composite foundation load transfer mechanism, and the vertical reinforcement composite foundation is divided into a discrete material pile composite foundation, a flexible pile composite foundation and a prestressed pipe pile composite foundation.

The prestressed pipe pile composite foundation has high strength, can effectively transmit load to deep soil, and can effectively reduce the settlement deformation of a reinforcing area so as to reduce the total settlement of the foundation, so that the prestressed pipe pile composite foundation is more and more applied.

The prestressed pipe pile composite foundation comprises a prestressed pipe pile extending into a soil body and a mattress layer positioned above the prestressed pipe pile, and technical documents about the prestressed pipe pile composite foundation in the prior art are more.

However, in the use process of the existing prestressed pipe pile composite foundation, under the building load on the upper part of the mattress layer and the adjusting action of the mattress layer, the prestressed pipe piles and the soil body are stressed together and are simultaneously settled, and under the equal settlement amount, the prestressed pipe piles can fully exert the bearing capacity, but the soil body between the prestressed pipe piles cannot fully exert the bearing capacity, so that the prestressed pipe piles are stressed too much, the pile foundation is damaged, and great potential safety hazards are brought. Particularly, when the soil at the bottom of the prestressed pipe piles is very hard, the settlement amount of the prestressed pipe piles is very small, the compression modulus of the prestressed pipe piles is very large, and the compression modulus of the prestressed pipe piles is larger than that of the soil between the prestressed pipe piles.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the prestressing force tubular pile among the current prestressing force tubular pile composite foundation the bearing capacity has been fully developed, the soil body still does not fully exert the bearing capacity makes the prestressing force tubular pile atress too big and there is the problem of potential safety hazard, and a prestressing force tubular pile composite foundation is provided, can let the soil body between the prestressing force tubular pile take place to subside earlier, after the soil bearing capacity between the fully exerted stake, again with the prestressing force tubular pile atress jointly under mattress layer regulatory action, thereby the bearing capacity of the fully exerted soil body, reduce the atress of prestressing force tubular pile, eliminate the prestressing force tubular pile atress too big and the potential safety hazard of bringing.

For solving the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model provides a compound ground of stress tube stake in advance, is provided with the mattress layer that is used for bearing the weight of building foundation including arranging at least one stress tube stake in the soil body in advance's top, its characterized in that, stress tube stake's top is provided with the harmonious layer of modulus, perhaps the upper surface of the soil body highly is higher than stress tube stake's upper surface height in advance.

The modulus of the modulus coordination layer is smaller than that of the prestressed pipe pile, and the modulus of the modulus coordination layer is larger than that of the soil body.

The thickness of the modulus coordinating layer is 10-45 mm.

The thickness of the modulus coordinating layer is 15-30 mm.

The modulus coordination layer is made of rubber and plastic.

The modulus coordination layer is made of rubber particles, plastic particles, a rubber pad or a plastic pad.

The cross section area of the top of the part of the soil body extending out of the prestressed pipe pile is smaller than the cross section area of the bottom of the part of the soil body extending out of the prestressed pipe pile.

The longitudinal section of the part of the soil body extending out of the prestressed pipe pile is in a semicircular shape, a trapezoidal shape or a polygonal shape consisting of more than four edges.

The periphery of the part of the soil body extending out of the prestressed pipe pile is coated with a geogrid.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a composite foundation of prestressed pipe pile, because the upper surface height that is provided with the harmonious layer of modulus or the soil body at the top of prestressed pipe pile is higher than prestressed pipe pile's upper surface height, thereby makes the utility model discloses in the use, the soil body subsides a certain amount of later soil body and prestressed pipe pile earlier and subsides together again to the bearing capacity of the settlement volume full play soil body of the soil body has been improved, then with the common atress of prestressed pipe pile under mattress layer regulating action again. And then the settlement amount of the soil body is larger than that of the prestressed pipe pile, the bearing capacity of the soil body is fully exerted, and the stress of the prestressed pipe pile can be reduced on the premise of the same bearing capacity, so that the potential safety hazard caused by overlarge stress of the prestressed pipe pile is eliminated.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an embodiment of the present invention;

the labels in the figure are: i, prestressed pipe pile, 2, soil body, 3, mattress layer, 4, concrete cushion block, 5, building foundation, 6 and modulus coordination layer.

Detailed Description

The present invention will be further described with reference to the following examples, which are only some, but not all, of the examples of the present invention. Based on the embodiments in the present invention, other embodiments used by those skilled in the art without creative work belong to the protection scope of the present invention.

Combine the attached drawing, the utility model discloses a compound ground of stress tube stake in advance, including arranging at least one stress tube stake 1 in the soil body 2 in, it sets up many stress tube stake 1 promptly in the soil body 2, wherein there is stress tube stake 1's top to be provided with the mattress layer 3 that is used for bearing building basis 5, and in some embodiments, mattress layer 3's top is provided with concrete cushion 4, and building basis 5 sets up on concrete cushion 4, stress tube stake 1's top is provided with the harmonious layer 6 of modulus, perhaps the height of the upper surface of the soil body 2 is higher than stress tube stake 1's upper surface height. Because the modulus coordination layer is arranged at the top of the prestressed pipe pile or the height of the upper surface of the soil body is higher than that of the upper surface of the prestressed pipe pile, the soil body and the prestressed pipe pile are settled together after the soil body is settled by a certain amount in the using process, so that the bearing capacity of the soil body is fully exerted by the settlement of the soil body, and then the soil body and the prestressed pipe pile are stressed together under the adjusting action of the mattress layer. Therefore, the settlement of the soil body is greater than that of the prestressed pipe pile, the bearing capacity of the soil body is fully exerted, and the stress of the prestressed pipe pile can be reduced on the premise of the same bearing capacity, so that the potential safety hazard caused by overlarge stress of the prestressed pipe pile is eliminated.

Further, the modulus of the modulus coordination layer 6 is smaller than that of the prestressed pipe pile 1, and the modulus of the modulus coordination layer 6 is larger than that of the soil body 2. Modulus refers to the ratio of stress to strain of a material under stress.

It should be explained here that: modulus refers to the ratio of stress to strain of a material under stress. The modulus includes, but is not limited to, elastic modulus, compressive modulus, shear modulus, etc., which will be understood and appreciated by those skilled in the art and will not be described in detail herein.

In some embodiments, the main renting of the modulus coordination layer 6 is to allow the soil body to settle first, so as to give full play to the bearing capacity of the soil body, and then the soil body and the prestressed pipe piles are stressed together under the adjusting action of the mattress layer. The thickness of the modulus coordination layer is related to the soil quality of the soil body and the stress ratio of the pile soil; in some embodiments, the thickness of the modulus coordination layer is 10-45mm, that is, when the soil quality of the soil body is better and the pile-soil stress ratio (the ratio of the stress borne by the prestressed pipe pile to the stress borne by the soil body) is smaller, the thickness of the modulus coordination layer takes a small value; when the soil quality of the soil body is poor and the pile-soil stress ratio is large, the thickness of the modulus coordination layer takes a large value.

In some embodiments, the thickness of the modulus coordinating layer is 15-30 mm.

The utility model discloses a concrete shape and the material on the harmonious layer of modulus are unrestricted, as long as the modulus that can satisfy the harmonious layer of modulus is less than the modulus of prestressing force tubular pile to the modulus on the harmonious layer of modulus is greater than the modulus of the soil body can. In some embodiments, the modulus coordinating layer is made of rubber, plastic.

In some embodiments, the modulus coordinating layer is made of rubber particles, plastic particles, rubber mat, or plastic mat.

In the selection process of the material of the modulus coordination layer, the use environment should be considered, and the service life of the modulus coordination layer is ensured.

As another parallel embodiment of the utility model, the upper surface of the soil body 2 is higher than the upper surface height of the prestressed pipe pile 1, and the effect of letting the soil body stress earlier can be reached equally. It should be noted here that, as long as the soil body 2 is stressed earlier than the prestressed pipe pile 1, the protection scope of the present invention is within the following range.

In some embodiments, the cross-sectional area of the top of the portion of the soil body 2 extending out of the pre-stressed pipe pile 1 is smaller than the cross-sectional area of the bottom of the portion of the soil body 2 extending out of the pre-stressed pipe pile 1, that is, the upper end of the portion of the soil body extending out of the pre-stressed pipe pile 1 is small, and the lower section of the portion of the soil body extending out of the.

In some embodiments, the longitudinal section of the portion of the soil body 2 extending out of the prestressed pipe pile 1 is semicircular, trapezoidal, or polygonal composed of more than four sides.

In some embodiments, in order to improve the condition that the soil body extending out of the prestressed pipe pile 1 is uniformly stressed and is not easy to collapse, and the like, the periphery of the part of the soil body extending out of the prestressed pipe pile is wrapped with geogrid.

Claims

1. The utility model provides a compound ground of stress tube stake in advance, is provided with the mattress layer that is used for bearing the weight of building foundation including arranging at least one stress tube stake in the soil body in advance's top, its characterized in that, stress tube stake's top is provided with the harmonious layer of modulus, perhaps the upper surface of the soil body highly is higher than stress tube stake's upper surface height in advance.

2. The composite foundation of claim 1, wherein the modulus of the modulus coordinating layer is less than the modulus of the prestressed pipe piles, and the modulus of the modulus coordinating layer is greater than the modulus of the soil mass.

3. The prestressed pipe pile composite foundation of claim 1, wherein the thickness of said modulus coordinating layer is 10-45 mm.

4. The composite foundation of claim 3, wherein the thickness of said modulus coordinating layer is 15-30 mm.

5. The composite foundation of claim 2, wherein said modulus coordinating layer is made of rubber or plastic.

6. The composite foundation of claim 2, wherein said modulus coordinating layer is made of rubber particles, plastic particles, rubber mat or plastic mat.

7. The composite foundation of any one of claims 1-6, wherein the cross-sectional area of the top of the portion of the soil body extending out of the pre-stressed pipe pile is smaller than the cross-sectional area of the bottom of the portion of the soil body extending out of the pre-stressed pipe pile.

8. The composite foundation of the prestressed pipe pile of claim 7, wherein the longitudinal section of the portion of the soil body extending out of the prestressed pipe pile is semicircular or polygonal composed of more than four sides.

9. The composite foundation of claim 7, wherein the soil body is wrapped with geogrid around the portion extending out of the prestressed pipe pile.