CN220080142U - Round ground is wall foundation pit excavation system even - Google Patents

Abstract

The utility model relates to a circular ground wall-connected foundation pit excavating system, which comprises a central support hinge device, wherein the central support hinge device is vertically arranged at the center of a foundation, the bottom of the central support hinge device is anchored into the foundation, the top of the central support hinge device is rotatably connected with at least one gantry truss, the gantry truss transversely extends out and is parallel to the foundation up and down, and the gantry truss can perform circumferential rotation by taking the central support hinge device as an axle center; the lifting appliance is arranged on the gantry truss, can move back and forth from the head end to the tail end on the gantry truss, and can lift an object up and down. When the foundation pit is operated, the lifting appliance moves and can walk to any position in the foundation by being matched with the rotation of the gantry truss to lift earthwork, so that the full coverage of the working surface of the foundation pit is realized.

Description

Round ground is wall foundation pit excavation system even

[ field of technology ]

The utility model belongs to the field of bridge construction, and particularly relates to a circular ground wall-connected foundation pit excavation system.

[ background Art ]

The anchorage facilities are a general term for anchor block foundations (various forms such as an enlarged foundation, an underground continuous wall, a sunk well foundation, a pile foundation and the like), anchor blocks, main cable anchoring systems, protective structures and the like. The main cable is a huge member for fixing the end head of the main cable and preventing the main cable from moving, is an anchoring structure of the main cable in the suspension bridge, and the tension in the main cable is transmitted into a foundation through an anchorage and is a stress member for connecting the anchor cable with the bridge, and the stress member plays a role in pulling the bearing suspension cable of the bridge.

The gravity type anchorage of the suspension bridge needs to excavate a large foundation pit, and in order to prevent the risk that the foundation pit collapses due to radial acting force on the periphery of the foundation pit, a concrete wall, namely a diaphragm wall, needs to be built around the foundation, and then excavation is started in the foundation of the diaphragm wall.

The gravity type anchorage circular ground wall foundation pit of the suspension bridge generally has the problems of large area, deep depth, large excavation amount, low construction work efficiency, high cost and the like, the traditional foundation pit excavation method is implemented by adopting a crawler crane and a tower crane to cooperate with a bucket, and is a layered island excavation method, namely, firstly excavating the surrounding earthwork of a circular foundation, then excavating the central earthwork, excavating the next layer after excavating the surrounding earthwork, and then excavating the surrounding earthwork by adopting an excavator, and then using the crawler crane or a scaffold to cooperate with the bucket to slag; the earthwork of the central area is excavated by adopting an excavator, and then slag is discharged by adopting a tower crane or a crawler crane in cooperation with a bucket. The construction process comprises the following steps: (1) the excavator conveys the excavated earthwork in the foundation pit and loads the excavated earthwork into the bucket; (2) lifting the bucket by adopting a crawler crane or a tower crane, turning the bucket to a certain position which is stopped outside the foundation pit by a certain angle, unloading the bucket to the ground, and then transporting away the earthwork loading vehicle by using an excavator or a loader; (3) and after the earthwork is unloaded, the crawler crane or the tower crane rotates the empty lifting bucket by a certain angle to the excavation operation position in the foundation pit, and then the next earthwork excavation, transportation and loading are carried out.

By adopting the traditional excavation and slag discharge method, the following defects or defects exist:

(1) Because the weight and distance of the crawler crane and the tower crane are limited, the excavator is often required to turn soil to a certain position in the foundation pit, then the soil can be filled in the bucket, the soil outlet efficiency is low, and the construction period and cost of the anchorage are limited;

(2) Because the corresponding lifting capacities of the tower crane or the crawler crane are different when the lifting distances are different, the positions of the lifting hoppers in the foundation pit and the weight of soil in the lifting hoppers are required to be strictly controlled, the volume weights and the water contents of slag soil in different soil layers are also different, and certain uncertain risks can be brought to the weight control of the lifting hoppers. In addition, the gravity acceleration caused by the too high lifting speed of the lifting hook can also cause the lifting weight to be increased so as to generate overload risk. Therefore, the traditional excavation and slag discharging method has extremely high requirements on responsibility, experience and concentration of command and driver, and any error can cause safety accidents such as equipment overturning;

(3) The adoption of the cantilever scaffold for slag discharge is easy to control the position of the bucket, is not very sensitive to weight, but brings about the problem that the earthwork in the foundation pit needs to be dumped for many times and can be loaded into the hopper, so that the earthwork dumping cost in the pit is increased;

(4) When the crawler crane is used for slag discharge, if the angle of a crane arm lever is too steep during unloading, the risk of back turning exists;

(5) When a plurality of tower cranes are adopted to fully cover a foundation pit, potential interference and collision hazards among the tower cranes exist;

(6) The ground loading link is increased, the work efficiency is reduced, and the cost is increased;

in order to conveniently and rapidly excavate the soil, the soil-out efficiency is greatly improved, the construction period is shortened, the cost is reduced, and a new technical scheme is developed by the applicant.

[ utility model ]

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a circular ground wall-connected foundation pit digging system, which adopts the following technical scheme:

the circular ground wall-connected foundation pit excavating system comprises a central support hinge device, wherein the central support hinge device is vertically arranged at the center of a foundation, the bottom of the central support hinge device is anchored into the foundation, the top of the central support hinge device is rotatably connected with at least one gantry truss, the gantry truss transversely extends out and is parallel to the foundation up and down, and the gantry truss can rotate circumferentially by taking the central support hinge device as an axle center; the lifting appliance is arranged on the gantry truss, can move back and forth from the head end to the tail end on the gantry truss, and can lift an object up and down.

In a further improvement scheme, the central support hinge device comprises a drilling steel pipe pile, an auxiliary bearing platform and a rotatable hinge, wherein the bottom of the drilling steel pipe pile is anchored to a foundation, the top of the drilling steel pipe pile is connected with the auxiliary bearing platform, the rotatable hinge is arranged on the auxiliary bearing platform, and the gantry truss is fixedly connected to the rotatable hinge.

In a further development, a soil sampling box is lifted on the lifting device.

In a further development, a hydraulic grab is lifted on the lifting device.

In a further improvement scheme, a concrete conveying pipe is arranged on the gantry truss, a pump inlet and a plurality of pump outlets are arranged on the concrete conveying pipe, the pump outlets are distributed uniformly according to the length of the concrete conveying pipe, and a plurality of pump pipes capable of being detached up and down are arranged at the pump outlets; and a ground pump is arranged outside the foundation and is connected with a pump inlet of the concrete conveying pipe.

In a further development, a vibration-discharging concrete vibrator is suspended on the suspension device.

In a further improvement scheme, an annular track is arranged along the periphery of the outer ring of the ground continuous wall of the foundation in a surrounding mode, supporting legs are vertically supported below the tail ends of the gantry trusses, and the bottoms of the supporting legs are abutted to the annular track and can slide in the annular track.

In a further development, a backing pump is arranged outside the foundation, and the concrete pump outlet of the backing pump is directed at the foundation pit.

Compared with the prior art, the utility model has the beneficial effects that: when the foundation pit is operated, the lifting appliance moves and can walk to any position in the foundation by being matched with the rotation of the gantry truss to lift earthwork, so that the full coverage of the working surface of the foundation pit is realized.

[ description of the drawings ]

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a foundation pit excavation structure in an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a foundation pit excavation structure according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram III of a foundation pit excavation structure in an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a foundation pit casting structure according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a foundation pit casting structure according to an embodiment of the present utility model;

fig. 6 is a schematic diagram of a foundation pit casting structure according to an embodiment of the present utility model.

Description of main reference numerals:

10. a foundation; 20. a ground connecting wall; 30. gantry truss; 40. hoisting the appliance; 50. a concrete delivery pipe; 60. a central support hinge assembly; 61. drilling a steel pipe pile; 62. an auxiliary bearing platform; 63. a rotatable swivel hinge; 70. a soil sampling box; 80. a pump tube; 90. a discharge vibration type concrete vibrator; 100. a day pump; 110. a ground pump; 120. an endless track; 130. and (5) supporting legs.

[ detailed description ] of the utility model

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

In the description of the present utility model, plural means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and the above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, only for convenience of description and simplification of the description, and are not intended to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless clearly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly and may be connected directly or indirectly through an intermediary; the connecting device can be fixedly connected, detachably connected and integrally formed; may be a mechanical connection; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the utility model can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.

The utility model provides a circular ground wall-connected foundation pit excavating system, as shown in fig. 1 to 6, which comprises a central support hinge device 60, wherein the central support hinge device 60 is vertically arranged at the center of a foundation 10, the bottom of the central support hinge device 60 is anchored into the foundation 10, the top of the central support hinge device is rotatably connected with at least one gantry truss 30, the gantry truss 30 transversely extends out and is parallel to the foundation 10 up and down, and the gantry truss 30 can rotate circumferentially by taking the central support hinge device 60 as an axis; the gantry truss 30 is provided with a lifting device 40, and the lifting device 40 can move back and forth from the head end to the tail end on the gantry truss 30 and can lift and lower the lifting object.

When in use, the bottom of the central support hinge device 60 is anchored to the center of the foundation 10, the anchored depth is deeper than the depth of the excavation of the foundation 10, and the length of the gantry truss 30 is larger than the distance from the center of the foundation 10 to the edge of the foundation 10, so that the rotatable gantry truss 30 covers the circular foundation 10 within the rotation radius of the gantry truss, and the full coverage of the working surface of the foundation pit is realized. In an embodiment, as shown in fig. 1 to 6, two pairs of gantry trusses 30 are included and are symmetrically arranged, such that the pair of gantry trusses 30 are connected in a straight line, and the length of the straight line is greater than the diameter of the circular foundation 10; during operation, the lifting device 40 moves and can walk to any position in the foundation 10 to lift earthwork by matching with the rotation of the gantry truss 30, then the lifting device is lifted and moved to the top of an earthwork vehicle (also called a dump truck) outside the foundation 10 to unload soil, after the soil unloading is completed, the lifting device 40 is moved into the foundation 10 to lift the earthwork again, in the embodiment, as shown in fig. 1 and 3, the soil sampling box 70 is lifted on the lifting device 40, and the loading and the soil unloading of the earthwork are performed through the soil sampling box 70 when the earthwork is lifted. Compared with the traditional slag discharging mode, the excavating system provided by the utility model greatly improves the construction efficiency, saves the labor cost of mechanical leasing and driving, and most devices of the equipment for discharging the soil can be used in turnover in the subsequent similar engineering, thus the one-time investment cost is thinned, the equipment has certain economic and safety advantages, and the whole process for discharging the soil is safe, efficient and economic.

In the embodiment, as shown in fig. 1 to 6, an annular rail 120 is circumferentially arranged along the outer ring of the diaphragm wall 20 of the foundation 10, a supporting leg 130 is vertically supported below the tail end of the gantry truss 30, the bottom of the supporting leg 130 is abutted in the annular rail 120 and can slide in the annular rail 120, the supporting leg 130 is arranged on one hand for supporting the gantry truss 30 to prevent the gantry truss 30 from overturning, the use safety of the gantry truss 30 is improved, and the gantry truss 30 can drive the supporting leg 130 to slide on the annular rail 120 when rotating, so that the rotation stability and smoothness of the gantry truss 30 are improved.

In an embodiment, as shown in fig. 1 to 6, the central supporting hinge device 60 includes a drilled steel pipe pile 61, an auxiliary bearing platform 62 and a rotatable hinge 63, the bottom of the drilled steel pipe pile 61 is anchored to the foundation 10, the top of the drilled steel pipe pile is connected with the auxiliary bearing platform 62, the rotatable hinge 63 is disposed on the auxiliary bearing platform 62, and the gantry truss 30 is fixedly connected to the rotatable hinge 63.

In the embodiment, the hydraulic grab bucket is lifted on the lifting appliance 40, after the gantry truss 30 and the lifting appliance 40 carry the hydraulic grab bucket to reach a preset position, the hydraulic grab bucket can be started to grab earthwork and then directly convey earthwork, and the hydraulic grab bucket has the advantages of large primary excavation amount, integrated excavation and transportation, simple and rapid operation and the like, and compared with the traditional foundation pit excavation, the hydraulic grab bucket does not need to perform secondary or multiple pit inner dumping of foundation pit earthwork, does not need pit external loading equipment, has more obvious advantages when the soil in the pit is silt type soft soil and cannot bear the load of an excavator, and can fully exhibit the advantages when the foundation 10 is initially excavated and the depth of the foundation 10 is not deep, and then adopts the excavator to excavate.

In an embodiment, as shown in fig. 4, 5 and 6, a concrete conveying pipe 50 is arranged on the gantry truss 30, a pump inlet and a plurality of pump outlets are arranged on the concrete conveying pipe 50, the pump outlets are uniformly distributed according to the length of the concrete conveying pipe 50, and a plurality of pump pipes 80 which can be detached from each other are arranged at the pump outlets; a ground pump 110 is provided outside the foundation 10, and the ground pump 110 is connected to a pump inlet of the concrete pipe 50. In the embodiment, through the cooperation of the gantry truss 30 and the concrete conveying pipe 50, the whole foundation pit is covered in a rotating mode to perform concrete pouring operation, in the material distribution pouring process, the pump pipe 80 can be detached along with the pouring height of the foundation pit, the ultra-large-volume core filling concrete of the foundation pit is distributed and poured, and the pouring construction difficulty of the ultra-large-volume core filling concrete is further saved.

In an embodiment, as shown in fig. 5 and 6, a vibration-discharging type concrete vibrator 90 is lifted on the lifting device 40, when concrete is poured into a round foundation pit, the vibration-discharging type concrete vibrator 90 synchronously works to vibrate the concrete in the foundation pit, and vibration is performed in the material distribution pouring process, so that the pouring vibration construction difficulty of ultra-large-volume core filling concrete is further saved.

The foundation 10 is provided with a vertical pump, a concrete pump outlet of the vertical pump points to the foundation pit, and when concrete is poured through the concrete conveying pipe 50 and the pump pipe 80, the vertical pump synchronously pours into the foundation pit, so that a cloth pouring gap of the concrete conveying pipe 50 is filled.

While the present utility model has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications can be made therein without departing from the spirit and scope of the utility model as defined in the following claims. Accordingly, the detailed description of the disclosed embodiments is to be taken only by way of illustration and not by way of limitation, and the scope of protection is defined by the content of the claims.

Claims (8)

1. The circular ground wall-connected foundation pit excavating system is characterized by comprising a central support hinge device (60), wherein the central support hinge device is vertically arranged at the center of a foundation (10), the bottom of the central support hinge device (60) is anchored into the foundation (10), the top of the central support hinge device is rotatably connected with at least one gantry truss (30), the gantry truss (30) transversely extends out and is parallel to the foundation (10) up and down, and the gantry truss (30) can rotate circumferentially by taking the central support hinge device (60) as an axle center; the gantry truss (30) is provided with a lifting appliance (40), and the lifting appliance (40) can move back and forth from the head end to the tail end on the gantry truss (30) and can lift and lower the lifting object.

2. The circular ground wall foundation pit excavation system according to claim 1, wherein the central support hinge device (60) comprises a drilled steel pipe pile (61), an auxiliary bearing platform and a rotatable hinge, the bottom of the drilled steel pipe pile (61) is anchored to the foundation (10), the top of the drilled steel pipe pile is connected with the auxiliary bearing platform (62), the rotatable hinge (63) is arranged on the auxiliary bearing platform (62), and the gantry truss (30) is fixedly connected to the rotatable hinge (63).

3. A circular earth-continuous wall pit excavation system according to claim 1, wherein a soil sampling tank (70) is suspended from the suspending means (40).

4. A round earth-connecting pit excavation system according to claim 1, characterized in that hydraulic grapples are hoisted on the hoisting means (40).

5. A circular earth-connected foundation pit excavation system according to claim 1, characterized in that a concrete conveying pipe (50) is provided on the gantry truss (30), a pump inlet and a plurality of pump outlets are provided on the concrete conveying pipe (50), the pump outlets are equally arranged according to the length of the concrete conveying pipe (50), and a plurality of pump pipes (80) which can be detached up and down are provided at the pump outlets; a ground pump is arranged outside the foundation (10), and the ground pump (110) is connected with a pump inlet of the concrete conveying pipe (50).

6. A circular earth-connecting pit excavation system of claim 5, wherein a vibration-exhausting concrete vibrator (90) is suspended from the suspending means (40).

7. The circular ground wall-connected foundation pit excavation system according to claim 1, wherein an annular track (120) is circumferentially arranged along the outer ring of the ground wall (20) of the foundation (10), a supporting leg (130) is vertically supported below the tail end of the gantry truss (30), and the bottom of the supporting leg (130) is abutted in the annular track (120) and can slide in the annular track (120).

8. A round earth-continuous wall pit excavation system according to claim 5, characterized in that a overhead pump (100) is provided outside the foundation (10), the concrete pump outlet of the overhead pump (100) being directed towards the foundation pit.