CN-122013789-A - Foundation pit oblique enclosing system and construction method thereof

CN122013789ACN 122013789 ACN122013789 ACN 122013789ACN-122013789-A

Abstract

The invention discloses a foundation pit oblique enclosing system and a construction method thereof, which belong to the technical field of building construction and comprise an enclosing pile and an inclined strut acting on the enclosing pile, wherein a supporting body is fixedly arranged at the top end of the enclosing pile, a bottom plate is fixedly arranged at the top end of the inclined strut, a rotating piece is rotatably arranged between the supporting body and the bottom plate, gears are arranged at two ends of the rotating piece, supporting plates are fixedly arranged at two sides of the rotating piece on the side wall of the enclosing pile, side plates are fixedly arranged on the supporting plates, the gears are rotatably connected with the side plates, a driving mechanism of a compression bar acting on the side wall of the enclosing pile is fixedly arranged on the supporting plates, and racks meshed with the gears are fixedly connected on the compression bar. The system couples the two functions of transverse support fender post and adjustment inclined support in one action, not only reinforces the fender post from the side, but also synchronously increases the jacking force of the inclined support, thereby forming a bidirectional synergistic reinforcement effect and remarkably improving the overall rigidity and stability of the fender system.

Inventors

WANG XIAOLIN
HUANG DIE
WANG WEI
ZHAO QIANG
MIAO FENG
LI ZIANG

Assignees

上海建工四建集团有限公司

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (8)

1. The utility model provides a foundation ditch slant enclosure system, includes the enclosure stake and acts on the bracing of enclosure stake, a serial communication port, enclosure stake top is fixed and is provided with the supporter, bracing top fixed mounting has the bottom plate, rotate between supporter and the bottom plate and install the rotation piece, rotate the interval between rotation piece can adjust supporter and the bottom plate, it all is provided with the gear to rotate the piece both ends, rotates the gear and can make the rotation piece rotate, enclosure stake lateral wall all is fixed in rotation piece both sides and is provided with the backup pad, fixedly provided with curb plate in the backup pad, the gear rotates with the curb plate to be connected, fixedly connected with is used for exporting rectilinear motion's actuating mechanism in the backup pad, actuating mechanism output fixedly connected with is acted on the depression bar of enclosure stake lateral wall, fixedly connected with and gear engagement's rack on the depression bar, actuating mechanism drive depression bar removes and can rotate in order to make the interval between regulation bottom plate and the supporter through the rack drive gear rotation.
2. The foundation pit diagonal bracing system according to claim 1, wherein the embedded rod is embedded in the supporting body, the axial direction of the embedded rod is parallel to the axial direction of the diagonal bracing, a top plate is slidably mounted on the embedded rod, a first spring is fixedly connected between the top plate and the supporting body, and the rotating member is rotatably mounted between the top plate and the bottom plate.
3. The foundation pit diagonal bracing system according to claim 2, wherein the embedded bars are slidably provided with connecting plates, the first springs are fixedly connected between the connecting plates and the top plate, the side walls of the connecting plates, which are close to the supporting bodies, are attached to the supporting bodies, and the side walls of the connecting plates, which are far away from the supporting bodies, are perpendicular to the diagonal braces.
4. The foundation pit diagonal bracing system according to claim 3, wherein the bottom plate is fixedly connected with a fence, the fence is connected with the bottom plate to form a box body, the rotating piece is rotatably arranged in the box body, a notch is arranged on the side, far away from the bottom plate, of the box body, the top plate is slidably connected with the notch, the top plate and the notch are matched to seal the box body, connecting shafts are fixedly connected to two ends of the rotating piece, and the connecting shafts penetrate through the box body to be connected with the gear key.
5. The diagonal bracing system for foundation pit of claim 4, wherein a second spring is fixedly connected between the top plate and the top wall of the box body.
6. The foundation pit diagonal bracing system according to claim 5, wherein the rotating member is a cam.
7. The foundation pit diagonal bracing system according to claim 5, wherein the rotating member is a round table, the bottom plate and the top plate are provided with curved surfaces matched with the round table so that the bottom plate and the top plate are in surface contact with the round table, a threaded shaft is fixedly sleeved on the connecting shaft and is in threaded connection with the enclosure, the round table can be axially moved along the threaded shaft by rotating the threaded shaft so as to adjust the distance between the bottom plate and the top plate, a key groove is arranged in the gear, and a gap is arranged between the connecting shaft and the side wall of the key groove so that the connecting shaft can axially move along the gear.
8. The construction method of the foundation pit diagonal bracing system according to any one of claims 1 to 7, comprising the steps of: s1, constructing a guard pile in soil, forming an inclined hole of an inclined strut by using pile foundation equipment, and inserting the inclined strut into the inclined hole to reach a corresponding designed elevation; S2, fixing the diagonal brace with a bottom plate of the box body, wherein a rotating piece in the box body is in a state capable of rotating and enabling the distance between a top plate and the bottom plate to be increased or decreased; s3, a gear is sleeved on a connecting shaft in a sliding mode, then a supporting plate and a side plate are installed, the gear is connected with the side plate in a rotating mode, a pressing rod is installed on the supporting plate in a sliding mode, the gear is meshed with the gear, and a driving mechanism is fixedly installed on the supporting plate to enable the output end of the driving mechanism to be fixed with the pressing rod; s4, continuing to excavate soil, and driving the rotating piece to rotate through the driving mechanism in the process of excavating so as to adjust the supporting force on the fender post and the diagonal brace; S5, after the foundation pit is excavated to a preset position, pouring a concrete bottom plate.

Description

Foundation pit oblique enclosing system and construction method thereof Technical Field The invention belongs to the technical field of building construction, and particularly relates to a foundation pit inclined support system and a construction method thereof. Background With the rapid development of high-rise buildings, the foundation pit is bigger and deeper, and the construction of the supporting structure of the foundation pit is more and more difficult. In the building construction process, in order to ensure the safety and the construction convenience of the underground structure construction and the surrounding environment of the deep foundation pit, supporting and reinforcing measures must be adopted for the side wall and the surrounding environment of the deep foundation pit. At present, some foundation pits can adopt inclined supports, for example, chinese patent publication No. CN111364480A discloses a prestressed inclined pile support and a construction method thereof, a prestressed applying device is additionally arranged on the existing inclined pile support, and a force transmission device can provide reverse thrust for the inclined pile support to enable the inclined pile to deform in advance, so that the bearing capacity of the inclined pile is rapidly exerted. However, only the prestressing force is applied to the diagonal bracing, which is equivalent to pushing the fender post from the side, and the force needs to overcome the defects of initial bending, seam loosening and the like of the fender post, so that the efficiency is lower, and the prestressing force is intensively applied to the diagonal bracing, so that the diagonal bracing is easily damaged due to stress, and the stress reliability of the diagonal bracing is reduced. Therefore, a foundation pit diagonal bracing system and a construction method thereof are needed to solve the above problems. Disclosure of Invention In view of the above, the present invention aims to provide a foundation pit diagonal bracing system and a construction method thereof, which can improve the overall rigidity, initial state and deformation control capability of the bracing system fundamentally by directly strengthening the bracing pile body and optimizing the cooperative stress with the diagonal bracing. In order to achieve the above purpose, the present invention provides the following technical solutions: The invention discloses a foundation pit oblique enclosing system, which comprises an enclosing pile and an inclined strut acting on the enclosing pile, wherein a supporting body is fixedly arranged at the top end of the enclosing pile, a bottom plate is fixedly arranged at the top end of the inclined strut, a rotating piece is rotatably arranged between the supporting body and the bottom plate, the rotating piece can adjust the distance between the supporting body and the bottom plate by rotating, gears are arranged at two ends of the rotating piece, the rotating piece can be rotated by rotating the gears, supporting plates are fixedly arranged on two sides of the rotating piece on the side wall of the enclosing pile, side plates are fixedly arranged on the supporting plates, the gears are rotatably connected with the side plates, a driving mechanism used for outputting linear motion is fixedly arranged on the supporting plates, a pressing rod acting on the side wall of the enclosing pile is fixedly connected with the output end of the driving mechanism, a rack meshed with the gear is fixedly connected on the pressing rod, and the driving mechanism drives the pressing rod to rotate through the rack so that the rotating piece can be rotated by the rack to adjust the distance between the bottom plate and the supporting body. Further, the embedded rod is embedded in the support body, the axial direction of the embedded rod is parallel to the axial direction of the diagonal bracing, a top plate is slidably mounted on the embedded rod, a first spring is fixedly connected between the top plate and the support body, and the rotating piece is rotatably mounted between the top plate and the bottom plate. Further, slidable mounting has the connecting plate on the embedded bar, first spring fixed connection is between connecting plate and roof, the connecting plate is close to the lateral wall and the laminating of supporter, the lateral wall and the bracing perpendicular setting of supporter are kept away from to the connecting plate. Further, fixedly connected with encloses the fender on the bottom plate, enclose the fender and be connected with the bottom plate and form the box, the rotation piece rotates and sets up in the box, the bottom plate side is kept away from to the box is provided with the breach, roof and breach sliding connection, roof and breach cooperation can seal the box, the equal fixedly connected with connecting axle in rotation piece both ends, the connecting axle passes box and gear key connection. Further, a second spring is fixe