Cast-in-place pile and secant pile with leakage detection and nondestructive repair functions

Abstract

The utility model discloses a cast-in-place pile with leakage detection and nondestructive repair functions and a secant pile using the cast-in-place pile. A steel bar net rack is arranged in the cast-in-place pile, and a plurality of embedded pipes made of degradable materials are symmetrically arranged on the steel bar net rack along the axial circumference. According to the utility model, the air tightness of the U-shaped cavity in the cast-in-place pile is detected, whether the waterproof performance of the cast-in-place pile meets the design requirement is detected, and the U-shaped cavity is utilized to inject a flexible sealing waterproof material into a defect part, so that nondestructive repair is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of perfusion pile and bite pile with leakage detection and non-destructive repair function. BACKGROUND

[0002] Perfusion pile is a kind of hole in situ, and it is made of pile by pouring concrete or reinforced concrete. Because of the factors of its working environment, there is difference between the medium (such as gravel, sand, etc.) in the pore of perfusion pile and the surrounding soil, which may cause water to infiltrate into the pore. In addition, because of the non-standard construction technology or long working time, the pile body appears damage, crack and other conditions, so that the perfusion pile appears cracking and water leakage. Moreover, the pouring quality of concrete at the depth of pile cannot be predicted, and there is a waterproof hidden danger.

[0003] Bite pile is a kind of foundation pit support structure formed by mutual bite arrangement between piles. The arrangement of piles is that one is non-reinforced and uses super-retarding concrete pile (plain pile), and the other is reinforced concrete pile (perfusion pile) (using full casing drill to construct). The two kinds of piles are usually arranged in bite along the edge of foundation pit, so that water leakage problem is easy to appear at the overlapping part of the two kinds of piles, and the pouring quality of concrete at the depth of pile cannot be predicted, and there is a waterproof hidden danger. Especially in deep foundation pit, facing underground water and quicksand layer, the waterproof requirement is higher. If the waterproof of bite pile is not good, the foundation pit may face the risk of water penetration and collapse. SUMMARY

[0004] The utility model provides a kind of perfusion pile and bite pile applied to the perfusion pile with leakage detection and non-destructive repair function according to the deficiency in the prior art, by detecting the air tightness of the reserved cavity in perfusion pile, whether the waterproof performance of perfusion pile meets the design requirement is detected, and by using this reserved cavity, flexible sealing waterproof material is injected to defect site, non-destructive repair is realized.

[0005] In order to solve the above technical problems, the utility model solves by the following technical scheme: a kind of perfusion pile with leakage detection and non-destructive repair function, steel mesh frame is arranged inside the perfusion pile, and the steel mesh frame is circumferentially symmetrical along the axial direction and is provided with a plurality of embedded pipes made of degradable material.

[0006] Preferably, the embedded pipe is a U-shaped pipe, the bottom of which extends along the bottom surface of the steel mesh frame, and the two ends extend higher than the top surface of the steel mesh frame, so as to protrude from the surface of the perfusion pile.

[0007] Preferably, the steel mesh frame includes a plurality of vertical bars arranged circumferentially and reinforcing bars, the reinforcing bars are ring-shaped reinforcing bars for fixing the vertical bars, and the steel mesh frame is provided with a plurality of spiral bars connected at the head and tail along the axial direction.

[0008] Preferably, the spacing between two adjacent reinforcing ribs is L1, and the diameter of the reinforcing rib is d; L1 = 2 × d.

[0009] Preferably, the height of a single turn of the spiral rib is L2; ​​L2 = L1 ÷ 10.

[0010] Preferably, the reinforcing bars at the top and bottom are 1.5 rings of steel bars.

[0011] Preferably, the reinforcing rib is disposed on the inner side of the vertical rib, and a plurality of protective ribs are disposed on the outer side of the vertical rib.

[0012] Preferably, the diameter of the embedded pipe is 20mm; it is 250-350mm higher than the steel mesh frame.

[0013] Preferably, the pre-embedded pipe degrades to form a U-shaped cavity, one end of which is connected to a sealing device, and the opening at the other end is connected to a detection device.

[0014] Preferably, the detection device has a gas pressure sensor at one end facing the U-shaped cavity and an external port at the other end.

[0015] Preferably, the gas pressure sensor signal is connected to an external data receiving and display device to display the gas pressure value of the U-shaped cavity.

[0016] Preferably, the external port can be connected to a negative pressure device for applying negative pressure to the U-shaped cavity.

[0017] Preferably, the external port can be connected to a grouting machine to inject flexible sealing and waterproofing material into the U-shaped cavity for non-destructive repair.

[0018] The paper also discloses an interlocking pile, comprising a plurality of plain piles and interlocking piles arranged at intervals, wherein the interlocking piles are the aforementioned cast-in-place piles.

[0019] This utility model provides a cast-in-place pile with leakage detection and non-destructive repair functions, as well as an interlocking pile using this cast-in-place pile, which solves leakage hazards and meets the relevant design specifications and functional requirements of Class I waterproofing. It also addresses the difficult problems related to waterproofing system reconstruction, such as limited construction space, high difficulty, overlapping construction, and in-situ non-destructive rapid detection and treatment of curtain wall leakage hazards. Furthermore, the use of reverse construction method, vacuum, and integrated waterproofing system vacuum detection during construction enables rapid detection of the waterproofing construction process and quality, ensuring the waterproofing project is delivered without quality defects. Attached Figure Description

[0020] In order to more clearly illustrate the technical schemes in the embodiments of the present application or the prior art, the following will describe the drawings needed to be used in the embodiments or the prior art description. Obviously, the technical schemes described in the description in combination with the drawings are only some embodiments of the present application, and for those skilled in the art, other embodiments and drawings can be obtained without creative labor on the basis of the embodiments shown in the drawings.

[0021] Figure 1 is a partial longitudinal section structure of the cast-in-place pile of the present application.

[0022] Figure 2 is an attached Figure 1 cross-sectional structure at A-A.

[0023] Figure 3 is a base pit plan view to which the present application is applied.

[0024] In the figure: cast-in-place pile 1, vertical rib 2, reinforcing rib 3, spiral rib 4, pre-embedded pipe 5, protective rib 6, plain pile 7, base pit 8. DETAILED DESCRIPTION

[0025] The technical schemes of the embodiments of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments described in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] As Figures 1 to 2 shown, the present embodiment discloses a kind of bite pile with waterproof detection and nondestructive repair function, including plain pile 7 and cast-in-place pile 1, the steel bar net frame is arranged in the cast-in-place pile 1, the steel bar net frame is symmetrically arranged with several pre-embedded pipes 5 made of degradable material along the axial circumference. The pre-embedded pipe 5 is U-shaped pipe, its bottom extends along the bottom surface of the steel bar net frame, and both ends extend higher than the top surface of the steel bar net frame, so as to protrude from the surface of cast-in-place pile 1. The diameter of pre-embedded pipe 5 is 20mm; it is higher than steel bar net frame 250-350mm. Pre-embedded pipe 5 forms U-shaped cavity after degradation, one end of the U-shaped cavity is connected with sealing device, and the opening at the other end is connected with detection device.

[0027] During construction, a hole is excavated at the designed preset position. The steel bar net frame with pre-embedded pipe 5 is placed in the hole, and then the concrete is poured. After the concrete hardens, cast-in-place pile 1 is formed. The pre-embedded pipe 5 is made of degradable material and forms a U-shaped cavity after degradation.

[0028] The U-shaped cavity can be used to detect air tightness to check whether the waterproof performance of the cast-in-place pile 1 meets the design requirements. One end of the detection device facing the U-shaped cavity is provided with a gas pressure sensor, and the other end is provided with an external port. The gas pressure sensor is signal connected to an external data receiving and display device for displaying the gas pressure value of the U-shaped cavity. The external port can be externally connected to a negative pressure device for negative pressure operation of the U-shaped cavity.

[0029] If the vacuum negative pressure value of the detection part is less than or equal to -60kpa and the pressure is maintained for 2-5 minutes or more, it is determined to be qualified, that is, the air tightness of the cast-in-place pile 1 meets the requirements.

[0030] If problems are detected and the air tightness does not meet the requirements, the external port can also be externally connected to a grouting machine to inject flexible sealing waterproof material into the U-shaped cavity for non-destructive repair.

[0031] The concentration of the slurry is prepared according to the width of the gap, the direction of the joint, the size of the vacuum detection value and the water quality. The aqueous slurry has two components, single component and A, B two components. The prepared slurry is stored in a special container.

[0032] Before grouting, check the grouting hole for air leakage and determine the amount of slurry. Under the condition of ensuring normality, connect the grouting machine, inject the slurry through the set pressure, stop grouting when the designed gel time is reached, and immediately remove the grouting machine.

[0033] The steel mesh frame includes a plurality of circumferentially arranged vertical bars 2 and reinforcing bars 3, the reinforcing bars 3 are annular reinforcing bars for fixing the vertical bars 2, and the steel mesh frame is provided with a plurality of spiral bars 4 connected in series along the axial direction. The distance between the adjacent two reinforcing bars 3 is L1, and the diameter of the reinforcing bar 3 is d; L1=2xd. The height of a single spiral bar 4 is L2; L2=L1÷10.

[0034] In addition, the reinforcing bars 3 at the top and bottom are 1.5 annular reinforcing bars.

[0035] The reinforcing bars 3 of the device are arranged on the inner side of the vertical bars 2, and a plurality of protective bars 6 are arranged on the outer side of the vertical bars 2.

[0036] As shown in the accompanying drawings Figure 3As shown, the second embodiment discloses a bite pile, which comprises a plurality of mutually spaced bite arranged plain piles 7 and meat piles, the meat piles are the above-mentioned cast-in-place piles 1. The device is suitable for reinforced concrete cast-in-place piles 1 in deep foundation pit 8, which requires to reach the first level of waterproofing. Therefore, the bite pile form is adopted, which is connected by a plurality of plain piles 7 and cast-in-place piles 1 at intervals, and is connected in a head-to-tail bite around the foundation pit 8. During construction, the plain pile 7 is first made, the plain pile 7 is constructed by using a full casing drill, concrete is poured, and super-delayed setting water reducing agent is mixed. After pouring, the concrete of the intersection part of the adjacent cast-in-place pile 1 and the plain pile 7 is cut off before the initial setting of the plain pile 7 concrete, and the construction of the cast-in-place pile 1 on both sides is completed, so as to realize the bite of the adjacent two piles. At the position of the AB bite joint, because the maximum waterproofing hidden danger of the deep foundation pit 8 enclosure structure formed by the whole bite pile is this joint, therefore, the pre-embedded pipe 5 is arranged at this part for detection and repair.

[0037] It is obvious for those skilled in the art that the present application is not limited to the details of the above-mentioned exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present application is defined by the appended claims, not the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0038] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A cast-in-place pile with leakage detection and non-destructive repair function, the cast-in-place pile (1) is internally provided with a reinforcement mesh frame, characterized in that: The reinforcing net frame is provided with a plurality of embedded pipes (5) made of degradable material along the axial circumference, the embedded pipe (5) is a U-shaped pipe, the bottom of which extends along the bottom surface of the reinforcing net frame, and the two ends extend higher than the top surface of the reinforcing net frame, thereby protruding from the surface of the cast-in-place pile (1), the embedded pipe (5) forms a U-shaped cavity after degradation, one end of the U-shaped cavity is connected with a blocking device, and the opening at the other end is connected with a detection device.

2. A cast-in-place pile according to claim 1, characterised in that: The reinforcing net frame comprises a plurality of vertically arranged vertical bars (2) and reinforcing bars (3) arranged in a circle, the reinforcing bar (3) is a ring-shaped reinforcing bar for fixing the vertical bar (2), and the reinforcing net frame is provided with a plurality of rings of spiral bars (4) connected at the head and tail along the axial direction.

3. A cast in place pile according to claim 2, characterised in that: The distance between the adjacent two rings of reinforcing bars (3) is L1, and the diameter of the reinforcing bar (3) is d; L1=2×d.

4. A cast-in-place pile according to claim 2, characterised in that: The height of a single ring of the spiral bar (4) is L2, L2=L1÷10.

5. A cast-in-place pile according to claim 2, characterised in that: The reinforcing bars (3) at the top and bottom are 1.5 rings of ring-shaped reinforcing bars.

6. A cast-in-place pile according to claim 2, characterised in that: The reinforcing bar (3) is arranged on the inner side of the vertical bar (2), and a plurality of protective bars (6) are arranged on the outer side of the vertical bar (2).

7. A cast-in-place pile according to claim 1, characterised in that: The diameter of the embedded pipe (5) is 20 mm, and the height of the embedded pipe (5) above the reinforcing net frame is 250-350 mm.

8. A cast-in-place pile according to claim 1, characterised in that: The detection device is provided with a gas pressure sensor at one end facing the U-shaped cavity, and an external port at the other end, the gas pressure sensor is signal-connected to an external data receiving and display device for displaying the gas pressure value of the U-shaped cavity, the external port can be externally connected to a negative pressure device for negative pressure operation of the U-shaped cavity, and the external port can be externally connected to a grouting machine for injecting flexible sealing waterproof material into the U-shaped cavity for non-destructive repair.

9. Bite pile comprising a number of elementary piles (7) and meat piles arranged at a mutual distance, characterized in that: The cast-in-place pile is the cast-in-place pile (1) according to any one of claims 1 to 8.

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