Secant pile unit and secant pile anti-seepage supporting system for deep foundation pit excavation

Abstract

The utility model relates to a secant pile unit and a deep foundation pit excavation secant pile water seepage prevention supporting system, the secant pile unit comprises a meat pile and a plain pile, the meat pile comprises a circular main pile body and an arc-shaped secondary pile body, the circular main pile body occupies a meat pile hole and comprises an overlapped space of the meat pile hole and a plain pile hole, the arc-shaped secondary pile body protrudes out of the side edge of the circular main pile body, and the arc-shaped secondary pile body is arranged on the side edge of the circular main pile body. The plain pile comprises two prefabricated arc-shaped concrete plates and an inner pile body, the two prefabricated arc-shaped concrete plates are symmetrically arranged at the front end and the rear end of a pile hole of the plain pile, openings of the two prefabricated arc-shaped concrete plates are opposite, vertically-formed partition plate inserting grooves are reserved in the ends of the prefabricated arc-shaped concrete plates, the arc-shaped secondary pile body enters a space clamped by the two prefabricated arc-shaped concrete plates, and the ends of the arc-shaped secondary pile body occupy the partition plate inserting grooves. And the rest part of the space between the two prefabricated arc-shaped concrete plates is fully occupied by the inner pile body. The secant pile anti-seepage supporting system for deep foundation pit excavation comprises a secant pile wall formed by arranging a plurality of secant pile units along the edge of a foundation pit. According to the method, water can be prevented from leaking into a foundation pit from a cold seam under the condition that the cold seam appears in the secant pile.

Description

Technical Field

[0001] The present application relates to the technical field of foundation pit enclosure construction, and in particular to an interlocking pile unit and an anti-seepage support system of interlocking piles for deep foundation pit excavation. Background Art

[0002] During the excavation of deep foundation pits, it is necessary to set up support parts and water-stop curtains at the edge of the foundation pit to ensure the safety of underground structure construction and the surrounding environment of the foundation pit and to prevent groundwater from flowing into the foundation pit. At present, interlocking piles are often used as foundation pit retaining structures. Interlocking piles are partially embedded in the circumference of adjacent concrete piles, and steel cages are placed in the piles constructed in sequence to form an overall continuous waterproof and retaining retaining structure with good anti-seepage effect. Figure 1 As shown, during construction, the plain piles A1 and A2 are constructed first, and then the meat pile B1 is constructed. The construction of the plain piles and the meat piles adopts the full-tube bored pile construction method. Taking advantage of the characteristics of super-slow setting concrete, the concrete of the intersection of the meat pile B1 with the plain piles A1 and A2 is cut off when drilling the meat pile B1, and then the meat pile B1 is poured to achieve bite. The existing problems are: the concrete of the intersection of the plain piles needs to be cut, resulting in a waste of concrete materials; the quality of the super-slow setting concrete is unstable, the plain piles are partially prematurely set, and the meat piles and the plain piles in the premature setting parts are weakly combined, that is, cold joints are generated, causing water to leak from the cold joints into the foundation pit. Utility Model Content

[0003] In order to solve the above problems, the present application provides a snap pile unit and a snap pile anti-seepage support system for deep foundation pit excavation. The technical solution adopted in the present application is as follows:

[0004] A meshing pile unit comprises a meat pile and a plain pile, the meat pile comprises a circular main pile body and an arcuate secondary pile body, the circular main pile body fills the meat pile hole including the overlapping space between the meat pile hole and the plain pile hole, the arcuate secondary pile body protrudes from the side of the circular main pile body, the plain pile comprises two prefabricated arcuate concrete plates and an inner pile body, the two prefabricated arcuate concrete plates are symmetrically arranged at the front and rear ends of the plain pile hole and their openings are opposite, a vertically opened partition slot is reserved at the end of the prefabricated arcuate concrete plate, the arcuate secondary pile body enters the space sandwiched by the two prefabricated arcuate concrete plates and its end fills the partition slot, and the remaining part of the space sandwiched by the two prefabricated arcuate concrete plates is filled by the inner pile body.

[0005] A deep foundation pit excavation interlocking pile anti-seepage support system comprises an interlocking pile wall, wherein the interlocking pile wall is composed of a plurality of interlocking pile units arranged along the edge of the foundation pit.

[0006] Furthermore, a crown beam is provided on the top of the interlocking pile wall, and a waist beam is provided on the side of the interlocking pile wall facing the foundation pit.

[0007] Furthermore, it also includes a steel support member, and the end of the steel support member is arranged on the waist beam.

[0008] Furthermore, it also includes an angle steel corbel, which is arranged at the lower end of the portion where the waist beam is connected to the steel support member and is connected to the interlocking pile wall.

[0009] Furthermore, it also includes soil reinforcement piles, which are used to be set in the soil located on the side of the interlocking pile wall facing away from the foundation pit.

[0010] The interlocking pile unit of the present application, during the construction process, first drills a hole for the plain pile, puts two prefabricated curved concrete slabs into the hole for the plain pile, and then pours concrete into the space sandwiched by the two prefabricated curved concrete slabs. During the pouring, a partition is used to assist in forming an arc-shaped interlocking notch. After the partition slots of the two prefabricated curved concrete slabs at both ends of the partition correspond to the partition slots of the two prefabricated curved concrete slabs, the partition is inserted into the hole for the plain pile in a vertical direction. After pouring, the inner pile body of the plain pile is obtained. Then the hole for the plain pile is drilled. Since the arc-shaped interlocking notch has been formed when the plain pile is cast, the problem of wasting concrete materials when drilling the hole for the plain pile is solved. After the drilling of the hole for the plain pile is completed, the partition is removed when the inner pile body is initially solidified. After removing the partition, an arc-shaped vacancy is obtained, which is connected to the hole for the plain pile. Then, a steel cage is placed in the hole for the plain pile and poured. The hole for the plain pile is filled with concrete to obtain a circular main pile body, and the arc-shaped vacancy is filled with concrete to obtain a arc-shaped secondary pile body. Therefore, the joint surface of the raw pile and the plain pile is between the two prefabricated curved concrete slabs, and the vertical edge line of the joint surface is blocked by the prefabricated curved concrete slab and is not in direct contact with the soil. When the plain pile partially sets early, even if a cold joint is produced, the edge of the cold joint will be blocked by the prefabricated curved concrete slab, thereby preventing water from leaking into the foundation pit from the cold joint.

[0011] The deep foundation pit excavation interlocking pile anti-seepage support system of the present application adopts a plurality of interlocking pile units arranged to form an interlocking pile wall, which has a good anti-seepage support effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a structural schematic diagram of the bite pile in the prior art;

[0014] Figure 2 It is a schematic structural diagram of the interlocking pile unit of the present application;

[0015] Figure 3A schematic diagram of the structure of a partition plate used as an auxiliary in the construction of the interlocking pile unit of the present application;

[0016] Figure 4 This is a schematic diagram of the structure of the deep foundation pit excavation interlocking pile anti-seepage support system of this application.

[0017] Description of reference numerals:

[0018] 11. Plain pile; 111. Circular main pile body; 112. Arc-shaped secondary pile body; 12. Plain pile; 121. Precast arc-shaped concrete slab; 1211. Partition slot; 122. Inner pile body; 10. Interlocking pile wall; 20. Crown beam; 30. Waist beam; 40. Steel support; 50. Angle steel corbel; 60. Soil reinforcement pile; 70. Partition. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below with reference to the accompanying drawings. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] The present application provides a snap-in pile unit, referring to Figure 2 The interlocking pile unit includes a meat pile 11 and a plain pile 12. The meat pile 11 includes a circular main pile body 111 and an arc-shaped secondary pile body 112. The circular main pile body 111 fills the meat pile hole, including the overlapping space between the meat pile hole and the plain pile hole. The arc-shaped secondary pile body 112 protrudes from the side of the circular main pile body 111. The plain pile 12 includes two prefabricated arc-shaped concrete plates 121 and an inner pile body 122. The two prefabricated arc-shaped concrete plates 121 are symmetrically arranged at the front and rear ends of the plain pile hole and the openings are opposite to each other. A vertically opened partition slot 1211 is reserved at the end of the prefabricated arc-shaped concrete plate 121. The arc-shaped secondary pile body 112 enters the space sandwiched by the two prefabricated arc-shaped concrete plates 121 and the end fills the partition slot 1211. The remaining part of the sandwiched space between the two prefabricated arc-shaped concrete plates 121 is filled by the inner pile body 122.

[0025] In the construction process of the interlocking pile unit of the present application, a pile hole is firstly drilled, two prefabricated curved concrete plates 121 are placed in the pile hole, and then concrete is poured into the space between the two prefabricated curved concrete plates 121. Figure 3The partition 70 shown is used to assist in forming an arc-shaped interlocking notch. After the two ends of the partition 70 correspond to the partition slots 1211 of the two prefabricated arc-shaped concrete panels 121, the partition 70 is inserted into the pile hole in the vertical direction. After pouring, the inner pile body 122 of the pile 12 is obtained. Then the pile hole is drilled. Since the arc-shaped interlocking notch has been formed when the pile 12 is poured, the problem of wasting concrete materials when drilling the pile hole is solved. After the drilling of the pile hole is completed, the partition 70 is removed when the inner pile body 122 is initially set. After removing the partition 70, an arc-shaped vacancy is obtained, which is connected to the pile hole. Then, the pile hole is placed in a steel cage and poured. The concrete fills the pile hole to obtain a circular main pile body 111, and the concrete fills the arc-shaped vacancy to obtain a arc-shaped secondary pile body 112. Therefore, the joint surface of the raw pile 11 and the plain pile 12 is between the two prefabricated curved concrete slabs 121, and the vertical edge line of the joint surface is blocked by the prefabricated curved concrete slabs 121 and is not in direct contact with the soil. When the plain pile 12 partially sets prematurely, even if a cold joint is produced, the edge of the cold joint will be blocked by the prefabricated curved concrete slabs 121, thereby preventing water from leaking into the foundation pit from the cold joint.

[0026] The present application also provides a deep foundation pit excavation interlocking pile anti-seepage support system, including an interlocking pile wall 10, wherein the interlocking pile wall 10 is composed of a plurality of interlocking pile units arranged along the edge of the foundation pit.

[0027] The deep foundation pit excavation interlocking pile anti-seepage support system of the present application adopts a plurality of interlocking pile units arranged to form an interlocking pile wall 10, which has a good anti-seepage support effect.

[0028] refer to Figure 4 In one embodiment of the deep foundation pit excavation interlocking pile anti-seepage support system of the present application, the interlocking pile wall 10 is arranged along the edge of the foundation pit and connected end to end to enclose the foundation pit, and a crown beam 20 is constructed on the top of the interlocking pile wall 10. In the process of excavating the foundation pit, a waist beam 30 is arranged on the side of the interlocking pile wall 10 facing the foundation pit, and a steel support member 40 is erected on the waist beam 30. The end of the steel support member 40 is supported on the waist beam 30 to support the inner side of the interlocking pile wall 10, and an angle steel bracket 50 is arranged at the lower end of the waist beam 30 connected to the steel support member 40. The angle steel bracket 50 is connected to the interlocking pile wall 10 to disperse the bearing force of the waist beam 30, and a plurality of soil reinforcement piles 60 are arranged in the soil on the side of the interlocking pile wall 10 facing away from the foundation pit to reinforce the soil, so as to prevent the interlocking pile wall 10 from tilting due to soil movement.

[0029] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] The above-described embodiments only express several implementation methods of the present application and should not be construed as limiting the scope of the patent application. It should be noted that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be subject to the attached claims.

Claims

1. A snap pile unit, characterized in that: It includes vegetarian piles and plain piles, the vegetarian piles include a circular main pile body and an arc-shaped secondary pile body, the circular main pile body fills the vegetarian pile hole including the overlapping space between the vegetarian pile hole and the plain pile hole, the arc-shaped secondary pile body protrudes from the side of the circular main pile body, the plain pile includes two prefabricated arc-shaped concrete slabs and an inner pile body, the two prefabricated arc-shaped concrete slabs are symmetrically arranged at the front and rear ends of the plain pile hole and the openings are opposite, the ends of the prefabricated arc-shaped concrete slabs are reserved with vertically opened partition slots, the arc-shaped secondary pile body enters the space sandwiched by the two prefabricated arc-shaped concrete slabs and the end fills the partition slot, and the remaining part of the space sandwiched by the two prefabricated arc-shaped concrete slabs is filled by the inner pile body.

2. A deep foundation pit excavation interlocking pile anti-seepage support system, characterized in that: It comprises an interlocking pile wall, which is composed of a number of interlocking pile units as claimed in claim 1 arranged along the edge of a foundation pit.

3. The deep foundation pit excavation interlocking pile anti-seepage support system according to claim 2 is characterized in that: A crown beam is arranged on the top of the interlocking pile wall, and a waist beam is arranged on a side of the interlocking pile wall facing the foundation pit.

4. The deep foundation pit excavation interlocking pile anti-seepage support system according to claim 3 is characterized in that: It also includes a steel support member, the end of which is arranged on the waist beam.

5. The deep foundation pit excavation interlocking pile anti-seepage support system according to claim 4 is characterized in that: It also includes an angle steel corbel, which is arranged at the lower end of the portion where the waist beam is connected to the steel support member and is connected to the interlocking pile wall.

6. The anti-seepage support system of deep foundation pit excavation interlocking piles according to any one of claims 2 to 5, characterized in that: It also includes soil reinforcement piles, which are used to be set in the soil located on the side of the interlocking pile wall facing away from the foundation pit.

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