CN211898321U

CN211898321U - Occlusive pile

Info

Publication number: CN211898321U
Application number: CN201922435482.4U
Authority: CN
Inventors: 郭桃明; 张中安; 孙波; 罗毅; 唐超华; 曹宇齐; 彭琦; 马敏; 余世为
Original assignee: Shenzhen Municipal Design and Research Institute Co Ltd
Current assignee: Shenzhen Municipal Design and Research Institute Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-11-10
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses an occlusive pile relates to underground structure construction technical field, including a plurality of plain piles and a plurality of meat stake, the plain pile is with the vertical setting in meat stake interval, adjacent plain pile and the mutual interlock of meat stake, and the plain pile is fiber cement soil bored concrete pile, and meat stake is reinforced concrete pile. During construction, cement is added into original soil which is dug out by a drilling machine in the hole forming construction process of the vegetable pile, fiber tensile materials are added to form fiber cement soil, and the fiber cement soil is poured to be used as the vegetable pile and is meshed with the meat pile to form the meshed pile. The elastic modulus and the strength difference of the fiber cement soil and the surrounding stratum are small, the problem that the pile body of a meat pile is easy to deviate due to uneven hardness is avoided, and the purposes of controlling the deformation deviation of the pile foundation and improving the pile forming quality are achieved. Meanwhile, as the fiber material with high tensile strength is added into the fiber cement soil, the tensile strength of the plain pile is improved, and the problem of pile body cracking of the plain pile caused by cutting soil body in the engaging construction process of the meat pile is avoided.

Description

Occlusive pile

Technical Field

The utility model relates to an underground structure construction technical field especially relates to an occlusive pile.

Background

Along with the acceleration of the urbanization process, in order to relieve various contradictions existing in the current urban development and meet special requirements of certain social and economic development, the reasonable development and construction of urban underground space have become necessary choices of various large cities. The space enclosing structure part is used as the first step of implementing a plurality of underground projects and plays a crucial role in the project construction, so that the space enclosing structure scheme suitable for the space enclosing structure part can be selected according to different field conditions and geological conditions, and the safe and orderly implementation of the underground projects can be ensured. In the construction of underground engineering in areas with complex stratum conditions, in particular in the construction of foundation pits penetrating through fully-weathered or gravelly cohesive soil strata, an occlusive pile enclosure structure is often adopted, wherein an occlusive pile row formed by occluding reinforced concrete piles and plain concrete piles is the most widely applied occlusive pile form in China at present.

The interlocking enclosure structure of the reinforced concrete piles and the plain concrete piles refers to interlocking row piles formed by matching the reinforced concrete piles and the plain concrete piles, the interlocking row piles are arranged in a mode that one plain concrete pile without reinforcements and one reinforced concrete pile are arranged at intervals, construction can be carried out in a soft cutting mode or a hard cutting mode, and concrete at the intersection part of adjacent plain piles is cut off, so that interlocking is realized. The construction steps of the secant pile are approximately as follows: 1. arranging a concrete guide wall at the top of the secant pile; 2. carrying out hole-forming construction on the plain concrete pile; 3. when the soft cutting method is adopted, a meat pile between two vegetable piles is constructed before the vegetable piles are initially solidified, and when the hard cutting method is adopted, the meat pile between two vegetable piles is constructed after the strength of the vegetable piles reaches 30%.

For a reinforced concrete pile and a plain concrete pile interlocking enclosure structure, a plain pile in a common interlocking pile at present mostly adopts C20 concrete, the strength and rigidity of the concrete of the firstly constructed plain pile are generally far greater than those of the surrounding stratum, and the verticality of the construction of the meat pile is difficult to control due to uneven hardness of the meat pile in the subsequent interlocking construction process, so that the pile quality of a pile foundation is not high, the meat pile deviates, and the insufficient interlocking quantity of the meat pile and the plain pile of the interlocking pile is caused, and a water leakage point is formed. According to the research on the actual situation of the site, the construction quality of the part of reinforced concrete piles and plain concrete piles meshed with the enclosure structure cannot meet the engineering requirements.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem above, the utility model provides an occlusive pile has solved in the current occlusive pile construction technology often factor stake and peripheral stratum rigidity, intensity difference great easily cause meat stake pile body off normal, the pile foundation becomes the problem that the stake quality is not high.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides an occlusive pile, including a plurality of vegetable piles and a plurality of meat stake, the vegetable pile with the vertical setting in meat stake interval, it is adjacent the vegetable pile with the mutual interlock of meat stake, the vegetable pile is fiber cement soil bored concrete pile, meat stake is reinforced concrete pile.

Preferably, the vegetable pile and the meat pile are both cylindrical.

Preferably, the diameter of the cross section of the vegetable pile is the same as that of the cross section of the meat pile.

Preferably, the center lines of the vegetable piles and the center lines of the meat piles are on the same plane.

Preferably, the center distance between any adjacent vegetable pile and meat pile is the same.

Preferably, the radius of the cross section of each vegetable pile is greater than half of the distance between the centers of the adjacent vegetable pile and the meat pile, and is less than the distance between the centers of the adjacent vegetable pile and the meat pile.

Preferably, the height of the meat pilings is greater than that of the vegetable pilings.

The utility model discloses for prior art gain following technological effect:

the utility model discloses an occlusive pile includes a plurality of plain piles and a plurality of meat stake, and the plain pile is with the vertical setting in meat stake interval, adjacent plain pile and the mutual interlock of meat stake, and the plain pile is the fiber cement soil bored concrete pile, and meat stake is reinforced concrete pile. During construction, cement is added into original soil which is dug out by a drilling machine in the hole forming construction process of the vegetable pile, fiber tensile materials are added to form fiber cement soil, the fiber cement soil is poured to serve as the vegetable pile and is meshed with a meat pile to form the meshed pile, and because the elastic modulus and the strength difference of the fiber cement soil and the surrounding stratum are small, the problem that a pile body of the meat pile is prone to deviation caused by uneven hardness is avoided, and the purposes of controlling pile foundation deformation deviation and improving pile forming quality are achieved. Meanwhile, as the fiber material with high tensile strength is added into the fiber cement soil, the tensile strength of the plain pile is improved, and the problem of pile body cracking of the plain pile caused by cutting soil body in the engaging construction process of the meat pile is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a top view of an occlusive pile provided by the present invention;

fig. 2 is a front view of an occlusive pile provided by the present invention.

Description of reference numerals: 1. carrying out plain piling; 2. meat pilings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model aims at providing an occlusive pile has solved in the current occlusive pile construction technology normal factor stake and peripheral stratum rigidity, intensity difference great easily cause meat stake pile body off normal, the pile foundation becomes the problem of low quality.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

As shown in fig. 1-2, the present embodiment provides a secant pile, which includes a plurality of vegetable piles 1 and a plurality of meat piles 2, wherein the vegetable piles 1 and the meat piles 2 are vertically arranged at intervals, adjacent vegetable piles 1 and meat piles 2 are meshed with each other, the vegetable piles 1 are fiber cement soil cast-in-place piles, soil in the fiber cement soil adopts undisturbed soil obtained by drilling on site, and the meat piles 2 are reinforced concrete piles.

Specifically, the vegetable pile 1 and the meat pile 2 are both cylindrical. The diameter of the cross section of the vegetable pile 1 is the same as that of the cross section of the meat pile 2.

In order to keep the plurality of vegetable piles 1 and the plurality of meat piles 2 flush, the center lines of the plurality of vegetable piles 1 and the center lines of the plurality of meat piles 2 are on the same plane.

In order to enable the plurality of vegetable piles 1 and the plurality of meat piles 2 to be uniformly and orderly arranged, the center distances between any adjacent vegetable piles 1 and any adjacent meat pile 2 are the same.

In order to realize the appropriate occlusion of the adjacent vegetable pile 1 and meat pile 2, the radius of the cross section of the vegetable pile 1 is greater than half of the center distance between the adjacent vegetable pile 1 and meat pile 2 and is smaller than the center distance between the adjacent vegetable pile 1 and meat pile 2.

In the embodiment, the height of the meat pile 2 is greater than that of the vegetable pile 1.

The embodiment also provides a construction method of the occlusive pile, which comprises the following steps:

(1) and (3) guide wall construction: the pile position is measured and set off, a concrete guide wall is constructed, the accurate positioning of the secant pile is ensured, and the stability of a drilling machine is ensured;

(2) drilling: centering a drilling machine in place, hanging and placing a sleeve, measuring and adjusting the verticality of the sleeve, drilling the sleeve into the punching and grabbing soil, performing matched construction by a rotary drilling machine, measuring the hole depth and removing the deficient soil after drilling is completed to form a plain pile hole;

(3) preparing fiber cement soil and pouring plain piles 1: adding cement and fibers into the original soil which is rotationally drilled in the drilling construction process, uniformly stirring to form fiber cement soil, and pouring the fiber cement soil into the hole of the plain pile to form a fiber cement soil cast-in-place pile;

(4) construction of a meat pile 2: and (3) manufacturing and hanging a reinforcement cage of the meat-bearing pile, cutting the fiber cement soil cast-in-place pile by adopting a full-sleeve soft method or a hard method, pouring concrete to form a reinforced concrete pile, and interlocking with the fiber cement soil cast-in-place pile to form an interlocking pile.

The mixing proportion of the fiber cement soil is calculated according to the condition of an undisturbed soil sample by combining various parameter indexes of cement, a water source, a fiber material and an additive, and the dosage of each material in each cubic meter of the fiber cement soil is determined after laboratory adaptation and adjustment. Wherein, the cement mixing ratio (the mass ratio of the mixed cement to the soil mass) can be generally 10-20%, the water cement ratio (the mass ratio of water to cement) can be generally 0.4-1.0, and the fiber mixing ratio (the mass ratio of the mixed fiber to the soil mass) can be generally 0.05-0.25%.

The fiber cement soil adopted in the embodiment has small difference in elasticity modulus and strength with the surrounding stratum, so that the problem that the pile body of the meat pile 2 is easy to deviate caused by uneven hardness is solved, and the aims of controlling deformation deviation of a pile foundation and improving pile forming quality are fulfilled. Meanwhile, as the fiber material with high tensile strength is added into the fiber cement soil, the tensile strength of the plain pile 1 is improved, and the problem of pile body cracking of the plain pile 1 caused by soil body cutting in the engaging construction process of the meat pile 2 is avoided.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. A secant pile is characterized by comprising a plurality of vegetable piles and a plurality of meat piles, wherein the vegetable piles and the meat piles are vertically arranged at intervals, the adjacent vegetable piles and the meat piles are mutually secant, the vegetable piles are fiber cement soil cast-in-place piles, soil in the fiber cement soil is original-state soil obtained by drilling on site, and the meat piles are reinforced concrete piles.

2. The bite pile of claim 1, wherein both the vegetarian pile and the meat pile are cylindrical.

3. The bite pile of claim 2, wherein a diameter of a cross-section of the vegetarian pile is the same as a diameter of a cross-section of the meat pile.

4. The bite pile of claim 3, wherein a centerline of the plurality of plain piles and a centerline of the plurality of meat piles are in the same plane.

5. The bite pile of claim 4, wherein the center-to-center distance of any adjacent vegetable pile and meat pile is the same.

6. The bite pile of claim 5, wherein a radius of a cross section of the vegetable pile is greater than half a center distance of the adjacent vegetable pile and meat pile and less than a center distance of the adjacent vegetable pile and meat pile.

7. The bite pile of claim 1, wherein the height of the meat pile is greater than the height of the vegetable pile.