Combined type top-down pipe jacking working well

Abstract

The utility model discloses a combined type top-down pipe jacking working well which comprises a well chamber, a plurality of stabilizing piles and a plurality of horizontally-arranged concrete well rings, and the well chamber is vertically dug. The stabilizing piles are vertically inserted into the well chamber, the side wall of each stabilizing pile is attached to the inner wall of the well chamber, and the side walls of the adjacent stabilizing piles are connected in a sealed mode so that all the stabilizing piles can define a stabilizing frame. All the concrete walling cribs are sequentially stacked in the well chamber from top to bottom, and the outer wall of each concrete walling crib abuts against the inner wall of the stabilizing frame. The problems that a water stopping and soil fixing structure of a reverse well arranged in a soft soil area or a high underground water level area is complex, cost is high, and the water stopping and soil fixing effect is not ideal can be solved.

Description

Technical Field

[0001] This utility model relates to the field of pipe jacking working well technology, specifically to a combined reverse pipe jacking working well. Background Technology

[0002] The plan dimensions and excavation depth of pipe jacking working shafts are usually large, and the support structure of the shaft chamber is required to provide the reaction force required for pipe jacking as a stable support surface.

[0003] The reverse construction shaft is a common structural form of pipe jacking shaft. The main construction method is to utilize the self-stabilizing ability of the soil. At a certain height of excavation at the shaft location, a ring of concrete is poured to support the soil and protect the lower part for safe construction. After the entire reverse construction shaft is fully formed, a lining can be added inside the shaft for use as a permanent structure.

[0004] In areas with soft soil or high groundwater levels, reverse-construction wells often carry higher risks. These risks are mainly due to the impact of the soft soil environment on the structural performance of the reverse-construction well, as well as the impact of groundwater infiltration and water pressure on its performance. Therefore, it is generally necessary to deploy dewatering wells, jet grouting piles, or cement mixing piles around the reverse-construction well to address these issues. This approach is complex, has high construction costs, and may not even achieve the desired water-stopping and soil-stabilizing effect. Utility Model Content

[0005] The purpose of this utility model is to provide a combined reverse-operation pipe jacking working well, which can solve the problems of complex water-stopping and soil-stabilizing structures, high costs, and unsatisfactory water-stopping and soil-stabilizing effects of reverse-operation wells set in soft soil areas or areas with high groundwater levels.

[0006] This utility model is achieved through the following technical solution:

[0007] A combined reverse-engineering pipe jacking working shaft includes a shaft chamber, which is vertically excavated; multiple stabilizing piles, which are vertically inserted into the shaft chamber, with the sidewall of each stabilizing pile respectively abutting against the inner wall of the shaft chamber, and the sidewalls of adjacent stabilizing piles being tightly connected to each other so that all the stabilizing piles form a stabilizing frame; and multiple horizontally arranged concrete well rings, all of which are stacked sequentially from top to bottom in the shaft chamber, with the outer wall of each concrete well ring abutting against the inner wall of the stabilizing frame.

[0008] Optionally, the top surface of the concrete well ring is provided with an annular groove, and the bottom of the upper concrete well ring is inserted into the annular groove of the lower concrete well ring.

[0009] Optionally, the outer side of the annular groove extends through the outer wall of the concrete well ring; when the bottom of the adjacent, stacked, upper concrete well ring is inserted into the annular groove of the lower concrete well ring, the inner wall of the upper concrete well ring abuts against the inner wall of the annular groove.

[0010] Optionally, the inner wall of the annular groove is inclined so that the cross-section of the annular groove in the thickness direction is a wedge-shaped groove.

[0011] Optionally, the inner wall of the concrete well ring is configured as an inclined surface that matches the annular groove; when the bottom of the upper concrete well ring is inserted into the annular groove of the lower concrete well ring, the inner wall of the upper concrete well ring abuts against and is squeezed against the inner wall of the annular groove.

[0012] Optionally, the bottom surface of the well chamber is covered with a base plate, and the side wall of the base plate is set as an inclined surface that matches the inner side wall of the concrete well ring; when the bottom of the lowest concrete well ring abuts against the bottom surface of the well chamber, the side wall of the base plate abuts against and is squeezed against the side wall of the lowest concrete well ring.

[0013] Optionally, the top sidewall of the uppermost concrete well ring extends horizontally outward to form a support edge, and the bottom surface of the support edge overlaps with the top surface of the stabilizing frame.

[0014] Optionally, the top sidewall of the uppermost concrete well ring extends horizontally outward to form a support edge, and the bottom surface of the support edge overlaps with the top surface of the stabilizing frame.

[0015] Optionally, the stabilizing pile is a Larssen sheet pile.

[0016] Optionally, the sidewall of the well chamber is vertically connected to a horizontally arranged jacking pipe so that the interior of the well chamber is connected to the external environment. On the opposite side, a rear seat wall is vertically provided, and the side of the rear seat wall away from the jacking pipe matches and fits the inner sidewall of the concrete well ring.

[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0018] This utility model provides a combined reverse-operation pipe jacking working well. A well chamber serves as the structural base, upon which multiple stabilizing piles are vertically inserted and abutted against the inner wall of the well chamber, providing structural support. Adjacent stabilizing piles are interconnected to form a stabilizing frame, enhancing the well's water-stopping performance and structural strength, thus effectively improving its water-stopping and soil-stabilizing properties. Furthermore, a multi-layered concrete well ring provides internal support to the inner wall of the well chamber during layer-by-layer excavation. Its outer wall abuts against the inner wall of the stabilizing frame, further indirectly enhancing the structural strength of the well chamber. Through the synergy of these features, this combined reverse-operation pipe jacking working well effectively solves the problems of complex water-stopping and soil-stabilizing structures, high costs, and unsatisfactory water-stopping and soil-stabilizing effects in reverse-operation wells located in soft soil areas or areas with high groundwater levels. It eliminates the need for external dewatering wells, jet grouting piles, or cement mixing piles. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 A top view of a combined reverse jacking shaft provided for an embodiment of this utility model;

[0021] Figure 2 A side sectional view of the combined reverse jacking working well provided for an embodiment of this utility model.

[0022] The attached diagram shows the markings and corresponding component names:

[0023] 1-Pipe jacking; 10-Stabilizing pile; 20-Concrete well ring; 21-Ring groove; 22-Support edge; 30-Base plate; 40-Rear wall. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0025] Example

[0026] Please refer to Figure 1 and Figure 2This embodiment provides a combined reverse-engineering pipe jacking working shaft, including a shaft chamber, which is vertically excavated; secondly, it includes multiple stabilizing piles 10, which are vertically inserted into the shaft chamber. The sidewall of each stabilizing pile 10 is respectively fitted to the inner wall of the shaft chamber, and the sidewalls of adjacent stabilizing piles 10 are tightly connected to each other so that all the stabilizing piles 10 form a stabilizing frame; thirdly, it includes multiple horizontally arranged concrete well rings 20, which are all stacked in the shaft chamber from top to bottom, and the outer wall of each concrete well ring 20 abuts against the inner wall of the stabilizing frame.

[0027] The combined reverse-engineering pipe jacking working well provided in this embodiment uses a well chamber as the structural base, and further installs multiple stabilizing piles 10 on this base. The stabilizing piles 10 are vertically inserted into the well chamber and abut against the inner wall of the well chamber to provide structural support. The sidewalls of adjacent stabilizing piles 10 are interconnected to form a stable frame, which improves the water-tightness of the well body while further enhancing its structural strength, thereby effectively improving its water-stopping and soil-stabilizing performance. Based on this, multiple... The layered concrete well ring 20 provides internal support to the inner wall of the well chamber during the layered excavation process. By setting its outer wall to abut against the inner wall of the stabilizing frame, the structural strength of the well chamber is further indirectly improved. Through the cooperation of the above features, this combined reverse-operation pipe jacking working well can effectively solve the problems of complex water-stopping and soil-stabilizing structures, high costs, and unsatisfactory water-stopping and soil-stabilizing effects of reverse-operation wells set in soft soil areas or areas with high groundwater levels. It eliminates the need to deploy dewatering wells, jet grouting piles, or cement mixing piles around the reverse-operation well.

[0028] To further improve the connection performance and structural support performance between each layer of concrete well ring 20, an annular groove 21 is provided on the top surface of the concrete well ring 20, and the bottom of the upper concrete well ring 20 stacked adjacently is inserted into the annular groove 21 of the lower concrete well ring 20.

[0029] With the above setup, the annular groove 21 of the lower concrete well ring 20 is used to horizontally limit the bottom of the upper concrete well ring 20, thereby further improving the connection performance and structural support performance.

[0030] To further enhance the support performance of the concrete well ring 20 for the stabilizing pile 10, the outer side of the annular groove 21 extends through the outer wall of the concrete well ring 20; when the bottom of the adjacent, stacked, upper concrete well ring 20 is inserted into the annular groove 21 of the lower concrete well ring 20, the inner wall of the upper concrete well ring 20 abuts against the inner wall of the annular groove 21.

[0031] In order to improve the connection performance between two adjacent concrete well rings 20, the inner wall of the annular groove 21 is inclined so that the cross section of the annular groove 21 in the thickness direction is a wedge-shaped groove.

[0032] Preferably, the inner wall of the concrete well ring 20 is configured as an inclined surface that matches the annular groove 21; when the bottom of the upper concrete well ring 20 is inserted into the annular groove 21 of the lower concrete well ring 20, the inner wall of the upper concrete well ring 20 abuts and presses against the inner wall of the annular groove 21.

[0033] To provide internal support for the bottom of the lowest concrete well ring 20, a base plate 30 is laid on the bottom surface of the well chamber. The side wall of the base plate 30 is set as an inclined surface that matches the inner side wall of the concrete well ring 20. When the bottom of the lowest concrete well ring 20 abuts against the bottom surface of the well chamber, the side wall of the base plate 30 abuts against and compresses the side wall of the lowest concrete well ring 20.

[0034] To prevent the concrete well ring 20 from sinking excessively, the top sidewall of the uppermost concrete well ring 20 extends horizontally outward to form a support edge 22, the bottom surface of which overlaps with the top surface of the stabilizing frame.

[0035] Preferably, the well chamber is cuboid, the stabilizing frame is a cuboid cylindrical shape that matches the well chamber, and the concrete well ring 20 is a rectangular frame that matches the stabilizing frame.

[0036] It should be noted that in this embodiment, the stabilizing pile 10 is a Larssen sheet pile. In other embodiments, any method in the prior art can be used to seal the sidewalls of adjacent stabilizing piles 10, such as welding or laying a waterproof layer.

[0037] To further optimize the overall stress distribution, the side wall of the well chamber is vertically connected to a horizontally arranged jacking pipe 1, so that the interior of the well chamber is connected to the external environment. On the opposite side, a rear seat wall 40 is vertically arranged, and the side of the rear seat wall 40 away from the jacking pipe 1 matches and fits the inner side wall of the concrete well ring 20.

[0038] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A combined reverse-operation pipe jacking working well, characterized in that, include: The well chamber is vertically excavated; Multiple stabilizing piles (10) are vertically inserted into the well chamber. The side wall of each stabilizing pile (10) is respectively fitted to the inner wall of the well chamber. The side walls of adjacent stabilizing piles (10) are connected to each other in a sealed manner so that all the stabilizing piles (10) form a stabilizing frame. Multiple horizontally arranged concrete well rings (20) are stacked sequentially from top to bottom in the well chamber, with the outer wall of each concrete well ring (20) abutting against the inner wall of the stabilizing frame.

2. The combined reverse jacking working well according to claim 1, characterized in that, The top surface of the concrete well ring (20) is provided with an annular groove (21), and the bottom of the upper concrete well ring (20) stacked adjacently is inserted into the annular groove (21) of the lower concrete well ring (20).

3. The combined reverse jacking working well according to claim 2, characterized in that, The outer side of the annular groove (21) penetrates the outer wall of the concrete well ring (20); When the bottom of the upper concrete well ring (20) is inserted into the annular groove (21) of the lower concrete well ring (20), the inner wall of the upper concrete well ring (20) abuts against the inner wall of the annular groove (21).

4. The combined reverse jacking working well according to claim 3, characterized in that, The inner wall of the annular groove (21) is inclined so that the cross section of the annular groove (21) in the thickness direction is a wedge-shaped groove.

5. The combined reverse jacking working well according to claim 4, characterized in that, The inner wall of the concrete well ring (20) is set as an inclined surface that matches the annular groove (21); When the bottom of the upper concrete well ring (20) is inserted into the annular groove (21) of the lower concrete well ring (20), the inner wall of the upper concrete well ring (20) abuts against and presses against the inner wall of the annular groove (21).

6. The combined reverse jacking working well according to claim 5, characterized in that, The bottom surface of the well chamber is covered with a base plate (30), and the side wall of the base plate (30) is set as an inclined surface that matches the inner side wall of the concrete well ring (20); When the bottom of the lowest concrete well ring (20) abuts against the bottom surface of the well chamber, the side wall of the base plate (30) abuts against and presses against the side wall of the lowest concrete well ring (20).

7. The combined reverse jacking working well according to claim 6, characterized in that, The top sidewall of the uppermost concrete well ring (20) extends horizontally outward to form a support edge (22), the bottom surface of which overlaps with the top surface of the stabilizing frame.

8. The combined reverse jacking working well according to any one of claims 1-7, characterized in that, The well chamber is rectangular, the stabilizing frame is a rectangular cylindrical shape that matches the well chamber, and the concrete well ring (20) is a rectangular frame that matches the stabilizing frame.

9. The combined reverse jacking working well according to claim 8, characterized in that, The stabilizing pile (10) is a Larsen sheet pile.

10. The combined reverse jacking working well according to claim 8, characterized in that, The side wall of the well chamber is vertically connected to a horizontally arranged jacking pipe (1) so that the interior of the well chamber is connected to the external environment. On the opposite side, a rear seat wall (40) is vertically arranged. The side of the rear seat wall (40) away from the jacking pipe (1) matches and fits the inner side wall of the concrete well ring (20).

Images