Sliding rail type device for guiding and torsion resistance of sinking construction of open caisson and construction method of sliding rail type device

Abstract

The invention discloses a sliding rail type device for guiding and torsion resistance of sinking construction of an open caisson and a construction method thereof.The sliding rail type device comprises sliding groove plates and omega-shaped protruding plates, the sliding groove plates are vertically arranged in a ring beam and a shallow reinforcing foundation, and at least two sliding groove plates are arranged in the circumferential direction of the outer side of an open caisson foundation pit; the omega-shaped protruding plates are installed on the outer wall of the segment ring, the sizes, the shapes, the number and the positions of the omega-shaped protruding plates correspond to the sizes, the shapes, the number and the positions of the sliding grooves of the sliding groove plate respectively, and the omega-shaped protruding plates are installed in the sliding grooves of the sliding groove plate and move in the vertical direction of the sliding grooves of the sliding groove plate. And the duct piece ring is guided. The pipe piece ring has the advantages that the sinking direction of the pipe piece ring can be controlled during sinking construction of the mechanical tunneling type open caisson, the guiding effect is achieved, and the perpendicularity of the open caisson structure is guaranteed; the inclination, translation and rotation phenomena of the open caisson structure can be improved by controlling the movement of the open caisson structure, and the final well completion quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of caisson construction, and in particular to a slide rail device for guiding and torsion-resistant caisson sinking construction and a construction method thereof. Background Art

[0002] With the continuous growth of the global population and the acceleration of urbanization, surface space resources are becoming increasingly scarce. Underground space development has become a key approach to addressing urban congestion and improving land use efficiency. Mechanically driven caisson construction technology, due to its advantages such as fast construction speed, small footprint, wide adaptability to different strata, and minimal impact on the surrounding environment, has begun to be applied to vertical shaft projects.

[0003] While mechanically driven caisson construction methods control shaft sinking through steel strand suspension, actively regulating the shaft's sinking speed and posture, the heterogeneity of the subsurface soil layers can lead to asymmetric loading and uneven friction between the soil and the shaft. This can cause the structure to tilt, translate, and rotate, impacting the shaft's construction quality and structural safety. Currently, positioning shims are commonly used in mechanically driven caisson construction to assist in controlling the caisson's sinking posture. Specifically, shims are placed in the gap between the shaft wall and the ring beam at the shaft entrance to control the sinking direction of the segment rings. However, this method can only control the sinking posture of a single segment ring at the shaft entrance, providing limited guidance. Furthermore, the segments are subject to wear during the sinking process, impacting shaft completion quality. Furthermore, the lower segment structure of the shaft experiences greater gravity, while the upper segment structure experiences less. This leads to differences in shear strength between the segment rings, resulting in inconsistent shear displacement and deformation along the shaft depth. This makes caisson posture control more difficult and affects its verticality. Summary of the Invention

[0004] The purpose of the present invention is to provide a slide rail device and a construction method for guiding and anti-torsion in caisson sinking construction based on the above-mentioned deficiencies of the prior art. The slide rail device pre-buries and anchors a slide plate in the ring beam and shallow reinforced foundation, and installs an Ω-shaped convex plate at the corresponding position on the outside of the pipe ring. When the vertical shaft structure sinks, it can rely on the Ω-shaped convex plate on the outside of the pipe ring to slide directionally in the slide groove of the slide plate to achieve a guiding effect on the vertical shaft, control the inclination, translation and rotation of the vertical shaft structure during construction, improve the verticality of the vertical shaft, ensure the quality of well completion, and improve the uneven stress and deformation of the vertical shaft.

[0005] The purpose of the present invention is achieved by the following technical solutions: A slide rail device for guiding and anti-torsion in caisson sinking construction, the slide rail device includes a slide plate and an Ω-shaped convex plate, the slide plate is vertically arranged in the ring beam and the shallow reinforced foundation and at least two are arranged along the outer circumference of the caisson foundation pit, the Ω-shaped convex plate is installed on the outer wall of the pipe segment ring, the size, shape, number and position of the Ω-shaped convex plate respectively correspond to the size, shape, number and position of the slide groove of the slide plate, the Ω-shaped convex plate is installed in the slide groove of the slide plate and moves along the vertical direction of the slide groove of the slide plate to guide the pipe segment ring.

[0006] The segment ring is provided with bolt embedded parts, and the Ω-shaped convex plate is fixed to the outer wall of the segment ring through the bolt embedded parts.

[0007] There are two chute plates, and the two chute plates are arranged opposite to each other.

[0008] The bottom of the chute plate is connected to the L-shaped steel plate, the vertical plate of the L-shaped steel plate is connected to the chute plate through bolts, and the horizontal plate of the L-shaped steel plate is fixed through expansion bolts.

[0009] The height of the chute plate is equal to the sum of the height of the ring beam and the height of the shallow reinforced foundation.

[0010] A gap is reserved between the Ω-shaped convex plate and the slide groove of the slide groove plate.

[0011] A construction method for a slide rail device for guiding and torsion-resistant caisson sinking construction, the construction method comprising the following steps: S1: fixing the chute plate in the foundation and applying lubricating material in the chute of the chute plate, reinforcing the foundation to obtain a shallow reinforced foundation, and constructing a ring beam on the shallow reinforced foundation; S2: using a roadheader to excavate the caisson foundation pit. When the excavation depth meets the installation requirement of the first segment ring, assemble the first segment ring, fix the Ω-shaped protruding plate to the outer wall of the first segment ring by means of embedded bolts, suspend the first segment ring by means of steel strands, and place the Ω-shaped protruding plate on the first segment ring into the chute of the chute plate, so that the Ω-shaped protruding plate on the first segment ring slides downward in the chute of the chute plate until it reaches the excavation depth. S3: Continue to excavate the caisson foundation pit. At this time, the steel strand on the first segment ring is still suspended on the first segment ring. When the excavation depth meets the installation requirements of the next segment ring, lower the first segment ring, assemble the next segment ring, fix the Ω-shaped protruding plate on the outer wall of the next segment ring through the bolt embedded parts, use the steel strand to suspend the next segment ring, and put the Ω-shaped protruding plate on the next segment ring into the slide groove of the slide plate, so that the Ω-shaped protruding plate on the next segment ring slides downward in the slide groove of the slide plate, connect the segment ring with the previous segment ring, and remove the steel strand suspending the segment ring; repeat the above steps until the construction of the vertical shaft is completed.

[0012] In step S1, the method for fixing the chute plate includes the following steps: S1.1: Drilling: Drilling mounting holes in the foundation for placing the chute plate and L-shaped steel plate; S1.2: Embedding: Install the chute plate and the L-shaped steel plate in the mounting hole; S1.3: Anchoring: Use expansion bolts to fix the L-shaped steel plate; S1.4: Backfill grouting: grouting is performed in the mounting hole to fix the chute plate and the L-shaped steel plate; In the above process, the verticality of the chute plate is detected in real time by using a laser rangefinder or a plumb bob line to ensure that the chute plate is always in a vertical state.

[0013] In step S2, the fixing point of the chute plate in the circumferential direction of the outer side of the caisson foundation pit is staggered with the suspension point of the steel strand on the first segment ring.

[0014] In step S3, the suspension point of the steel strand on the first segment ring is staggered with the suspension points of the steel strand on the other segment rings.

[0015] The advantages of the present invention are: (1) It can control the sinking direction of the segment ring during the mechanical excavation caisson sinking construction, realize the guiding function, and ensure the verticality of the caisson structure; (2) By controlling the movement of the caisson structure, the tilt, translation and rotation of the caisson structure can be improved to ensure the final quality of the well. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the chute plate of the present invention; Figure 2 Schematic diagram of the structure of the Ω convex plate of the present invention; Figure 3Schematic diagram of the detailed structure of the Ω convex plate and the chute plate of the present invention; Figure 4 Schematic diagram of the fixing structure of the chute plate of the present invention; like Figures 1 to 4 As shown, the marks in the figure represent: Slide plate 1, Ω-shaped convex plate 2, bolt embedded parts 3, ring beam 4, shallow reinforced foundation 5, segment ring 6, blade foot ring 7, steel strand 8, L-shaped steel plate 9, expansion bolt 10, bolt 11. DETAILED DESCRIPTION

[0017] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art: Example: Figures 1 to 4 As shown, this embodiment relates to a slide rail device for guiding and torsion resistance in caisson sinking construction, the slide rail device mainly includes a slide plate 1 and an Ω-shaped convex plate 2, the slide plate 1 and the Ω-shaped convex plate 2 are both made of high-strength steel materials, the slide plate 1 is vertically arranged in the ring beam 4 and the shallow reinforced foundation 5, and at least two are provided along the outer circumference of the caisson foundation pit. In this embodiment, the height of the slide plate 1 is equal to the sum of the height of the ring beam 4 and the height of the shallow reinforced foundation 5, which can ensure that the slide plate 1 passes through the entire soft foundation (unreinforced), which is convenient for the caisson structure to be installed in poor geological conditions. The sinking provides guidance and anti-torsion, while also preventing the chute plate 1 from becoming too long and causing instability, as well as wasting steel. The bottom of the chute plate 1 is connected to the L-shaped steel plate 9. The vertical plate of the L-shaped steel plate 9 is connected to the chute plate 1 via bolts 11, and the horizontal plate of the L-shaped steel plate 9 is fixed via expansion bolts 10. This further secures the chute plate 1 to the foundation, preventing the chute plate 1 from moving or rotating, which would affect the chute plate 1's guidance and anti-torsion function during subsequent construction. Two chute plates 1 are provided, and the two chute plates 1 are arranged opposite each other. The Ω-shaped protruding plate 2 is mounted on the outer wall of the segment ring 6, and the segment ring 6 is provided with bolt embedded parts 3. The Ω-shaped protruding plate 2 is fixed to the outer wall of the segment ring 6 via the bolt embedded parts 3. The segment ring 6 is assembled from a number of wedge-shaped segments. Before the segments are cast, the bolt embedded parts 3 are embedded in the concrete formwork so that they are cast together with the concrete to form a single unit. The size, shape, number and position of the Ω-shaped protrusion 2 correspond to the size, shape, number and position of the chute of the chute plate 1. The Ω-shaped protrusion 2 moves along the vertical direction of the chute of the chute plate 1 to guide the pipe segment ring 6. A gap of 1 to 2 cm is reserved between the Ω-shaped protrusion 2 and the chute of the chute plate 1 to ensure that the Ω-shaped protrusion 2 can slide smoothly in the chute of the chute plate 1 without getting stuck, which affects the sinking construction operation of the caisson structure and the quality of the pipe segment.

[0018] like Figures 1 to 4As shown, this embodiment also provides a construction method for a slide rail device for guiding and torsion-resistant caisson sinking construction, and the construction method mainly includes the following steps: S1: Fix the chute plate 1 in the foundation and brush lubricating material (such as grease) in the chute of the chute plate 1, and reinforce the foundation (such as grouting reinforcement) to obtain a shallow reinforced foundation 5, and construct a ring beam 4 on the shallow reinforced foundation 5.

[0019] The method for fixing the chute plate 1 includes the following steps: S1.1: Drilling: Drilling holes in the foundation for placing the chute plate 1 and the L-shaped steel plate 9; S1.2: Burying: Install the chute plate 1 and the L-shaped steel plate 9 in the mounting hole, and connect the chute plate 1 and the L-shaped steel plate 9; S1.3: Anchoring: Use expansion bolts 10 to fix the L-shaped steel plate 9; S1.4: Backfill grouting: grouting is performed in the installation hole to fix the chute plate 1 and the L-shaped steel plate 9; In the above process, the verticality of the chute plate 1 is detected in real time by a laser rangefinder or a pendulum line to ensure that the chute plate 1 is always in a vertical state, and avoids the complicated operation of driving it into the shallow reinforced foundation 5 after the construction is completed, while avoiding damage to the shallow reinforced foundation 5.

[0020] The lubricating material in the chute of the chute plate 1 is used for lubrication to reduce friction between the chute plate 1 and the Ω-shaped convex plate 2 .

[0021] S2: Use a tunnel boring machine to excavate the caisson foundation pit. When the excavation depth meets the installation requirements of the first segment ring 6 (i.e., the blade foot ring 7), assemble the first segment ring 6, fix the Ω-shaped protrusion 2 to the outer wall of the first segment ring 6 through the bolt embedded parts 3, suspend the first segment ring 6 with the steel strand 8, and place the Ω-shaped protrusion 2 on the first segment ring 6 into the slide groove of the slide plate 1, so that the Ω-shaped protrusion 2 on the first segment ring 6 slides downward in the slide groove of the slide plate 1 until it reaches the excavation depth.

[0022] Among them, the fixed point of the slide plate 1 on the circumferential outer side of the caisson foundation pit is staggered with the suspension point of the steel strand 8 on the first segment ring 6, which can avoid mutual interference and friction between the steel strand 6 on the first segment ring 6 and the Ω-shaped convex plate 2 and the slide plate 1, and ensure the independent execution of the suspension operation and the guide sliding operation.

[0023] S3: Continue to excavate the caisson foundation pit. At this time, the steel strand 8 on the first segment ring 6 is still suspended on the first segment ring 6. When the excavation depth meets the installation requirements of the next segment ring 6, lower the first segment ring 6, assemble the next segment ring 6, fix the Ω-shaped protrusion 2 on the outer wall of the next segment ring 6 through the bolt embedded parts 3, use the steel strand 8 to suspend the next segment ring 6, and put the Ω-shaped protrusion 2 on the next segment ring 6 into the slide groove of the slide plate 1, so that the Ω-shaped protrusion 2 on the next segment ring 6 slides downward in the slide groove of the slide plate 1, connect the segment ring 6 with the previous segment ring 6, and remove the steel strand 8 suspending the segment ring 6; repeat the above steps until the construction of the vertical shaft is completed.

[0024] Among them, the suspension points of the steel strand 8 on the first segment ring 6 are staggered with the suspension points of the steel strand 8 on other segment rings 6 (non-blade ring 7), ensuring that the steel strand 8 on the first segment ring 6 and the steel strand 8 on other segment rings 6 do not affect each other.

[0025] The beneficial technical effects of this embodiment are: (1) It can control the sinking direction of the segment ring during the mechanical excavation caisson sinking construction, realize the guiding function, and ensure the verticality of the caisson structure; (2) By controlling the movement of the caisson structure, the tilt, translation and rotation of the caisson structure can be improved to ensure the final quality of the well.

[0026] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described in detail here.

Claims

1. A slide rail device for guiding and torsion-resistant caisson sinking construction, characterized in that The slide rail device includes a slide plate and an Ω-shaped protrusion plate. The slide plate is vertically arranged in the ring beam and the shallow reinforced foundation and at least two are arranged along the outer circumference of the caisson pit. The Ω-shaped protrusion plate is installed on the outer wall of the pipe segment ring. The size, shape, number and position of the Ω-shaped protrusion plate correspond to the size, shape, number and position of the slide groove of the slide plate. The Ω-shaped protrusion plate is installed in the slide groove of the slide plate and moves along the vertical direction of the slide groove of the slide plate to guide the pipe segment ring.

2. A slide rail device for guiding and torsion-resistant caisson sinking construction as claimed in claim 1, characterized in that The segment ring is provided with bolt embedded parts, and the Ω-shaped convex plate is fixed to the outer wall of the segment ring through the bolt embedded parts.

3. A slide rail device for guiding and torsion-resistant caisson sinking construction as claimed in claim 1, characterized in that There are two chute plates, and the two chute plates are arranged opposite to each other.

4. A slide rail device for guiding and torsion-resistant caisson sinking construction as claimed in claim 1, characterized in that The bottom of the chute plate is connected to the L-shaped steel plate, the vertical plate of the L-shaped steel plate is connected to the chute plate through bolts, and the horizontal plate of the L-shaped steel plate is fixed through expansion bolts.

5. A slide rail device for guiding and torsion-resistant caisson sinking construction as claimed in claim 1, characterized in that The height of the chute plate is equal to the sum of the height of the ring beam and the height of the shallow reinforced foundation.

6. A slide rail device for guiding and torsion-resistant caisson sinking construction as claimed in claim 1, characterized in that A gap is reserved between the Ω-shaped convex plate and the slide groove of the slide groove plate.

7. A construction method for a guide and torsion-resistant slide rail device for caisson sinking construction according to any one of claims 1 to 6, characterized in that The construction method comprises the following steps: S1: fixing the chute plate in the foundation and applying lubricating material in the chute of the chute plate, reinforcing the foundation to obtain a shallow reinforced foundation, and constructing a ring beam on the shallow reinforced foundation; S2: using a roadheader to excavate the caisson foundation pit. When the excavation depth meets the installation requirement of the first segment ring, assemble the first segment ring, fix the Ω-shaped protruding plate to the outer wall of the first segment ring by means of embedded bolts, suspend the first segment ring by means of steel strands, and place the Ω-shaped protruding plate on the first segment ring into the chute of the chute plate, so that the Ω-shaped protruding plate on the first segment ring slides downward in the chute of the chute plate until it reaches the excavation depth. S3: Continue to excavate the caisson foundation pit. At this time, the steel strand on the first segment ring is still suspended on the first segment ring. When the excavation depth meets the installation requirements of the next segment ring, lower the first segment ring, assemble the next segment ring, fix the Ω-shaped protruding plate on the outer wall of the next segment ring through the bolt embedded parts, use the steel strand to suspend the next segment ring, and put the Ω-shaped protruding plate on the next segment ring into the slide groove of the slide plate, so that the Ω-shaped protruding plate on the next segment ring slides downward in the slide groove of the slide plate, connect the segment ring with the previous segment ring, and remove the steel strand suspending the segment ring; repeat the above steps until the construction of the vertical shaft is completed.

8. A construction method for a guide and torsion-resistant slide rail device for sinking caissons according to claim 7, characterized in that In step S1, the method for fixing the chute plate includes the following steps: S1.1: Drilling: Drilling mounting holes in the foundation for placing the chute plate and L-shaped steel plate; S1.2: Embedding: Install the chute plate and the L-shaped steel plate in the mounting hole; S1.3: Anchoring: Use expansion bolts to fix the L-shaped steel plate; S1.4: Backfill grouting: grouting is performed in the mounting hole to fix the chute plate and the L-shaped steel plate; In the above process, the verticality of the chute plate is detected in real time by using a laser rangefinder or a plumb bob line to ensure that the chute plate is always in a vertical state.

9. A construction method for a guide and torsion-resistant slide rail device for sinking caissons according to claim 7, characterized in that In step S2, the fixing point of the chute plate in the circumferential direction of the outer side of the caisson foundation pit is staggered with the suspension point of the steel strand on the first segment ring.

10. A construction method for a guide and torsion-resistant slide rail device for caisson sinking construction as claimed in claim 7, characterized in that In step S3, the suspension points of the steel strands on the first segment ring are staggered from the suspension points of the steel strands on the other segment rings.

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