Sealing structure for high-water-level dewatering well in soil body around foundation

Abstract

A high-water-level dewatering well sealing structure in a foundation peripheral soil body comprises a steel casing, a sand-free pipe and a pouring pipe frame arranged in the sand-free pipe, an inner water stop steel ring and an outer water stop steel ring are arranged on the inner wall and the outer wall of the steel casing respectively, the upper portion of the sand-free pipe penetrates into the steel casing, and a sealing ring is arranged between the bottom wall of the steel casing and the sand-free pipe. The pouring pipe frame comprises eight grouting pipes and reinforcing closed ring ribs used for fixing the eight grouting pipes, the eight grouting pipes are distributed on the same circumferential line in a central symmetry mode, the two grouting pipes, located on the opposite sides, of the eight grouting pipes are grouting pipes of the same level, and the lengths of the grouting pipes of different levels are different. By adopting the sand-free pipe, the grouting liquid can seep into the surrounding soil body, the compactness of the undisturbed soil body of the supporting layer of the surrounding soil body of the foundation is enhanced, a columnar water stop structure is formed, and the purposes of saving materials, reducing cost and improving efficiency can be achieved.

Description

Technical Field

[0001] This application relates to the field of building construction, specifically to a closed structure for high-water-level dewatering wells within the soil surrounding a foundation. Background Technology

[0002] During the dewatering and sealing construction of the foundation pit, the use of conventional dewatering well sealing methods encountered geological structures with high water levels and large water inflows. These structures have a shorter service life, compromise structural safety, and pose significant structural safety hazards. Utility Model Content

[0003] This application addresses the problems existing in the background technology by providing a simple structural method for reinforcing soil around foundations using a dual-liquid grouting sealing device for high-water-level dewatering wells. This method not only meets construction and design requirements but also significantly improves structural safety. Furthermore, the sand-free pipe allows the grout to seep into the surrounding soil, enhancing the density of the original soil bearing layer around the foundation and forming a columnar water-stopping structure, thus achieving the goals of material saving, cost reduction, and efficiency improvement.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A sealing structure for a high-water-level dewatering well in the soil surrounding a foundation, characterized by: a steel casing, a sand-free pipe, and a casting pipe frame built into the sand-free pipe; the inner and outer walls of the steel casing are respectively provided with an inner water-stopping steel ring and an outer water-stopping steel ring; the upper part of the sand-free pipe extends into the interior of the steel casing, and a sealing ring is provided between the bottom wall of the steel casing and the sand-free pipe; the casting pipe frame includes 8 grouting pipes and reinforcing sealing ring bars for fixing the 8 grouting pipes; the 8 grouting pipes are centrally symmetrically distributed on the same circumference; the 2 grouting pipes on opposite sides of the 8 grouting pipes are of the same grade, and the lengths of the different grades of grouting pipes are different.

[0006] More preferably, the outer water-stop steel ring is located below the inner water-stop steel ring, and both have a thickness of 3mm.

[0007] Furthermore, the grouting pipe is a segmented grouting pipe, with the middle and upper pipe walls being closed pipe walls, and grouting holes evenly distributed on the bottom surface of the pipe wall for 1m upwards.

[0008] Furthermore, the eight grouting pipes are divided into four levels from shortest to longest: Level 1 grouting pipe is 3-4m long, Level 2 grouting pipe is 6.5-7m long, Level 3 grouting pipe is 10-12m long, and Level 4 grouting pipe is 12-15m long.

[0009] Furthermore, the length of the sand-free pipe is 15-16m.

[0010] In addition, it also includes a graded crushed stone layer and a grouting layer located inside the sand-free pipe. The graded crushed stone layer is 2 to 2.2 m high. The 4-stage grouting pipe extends into the graded crushed stone layer by at least 1.5 m. The grouting layer is a mixture of water glass and cement.

[0011] More preferably, the thickness of the steel casing wall and the top sealing plate of the steel casing are both 6~8mm, and the top of the grouting pipe is sealed by welding with a 3~4mm steel plate.

[0012] Compared with the prior art, this utility model has the following features and beneficial effects:

[0013] This utility model can be used for sealing high-water-level dewatering wells in the soil surrounding the foundation at construction sites. This application involves layered pressure grouting to fill the pores of the soil around the dewatering wells, thereby reducing and eliminating groundwater seepage into the wells, gradually decreasing the water inflow into the dewatering wells within the raft foundation, thus safely and effectively sealing the dewatering wells. Ultimately, this achieves the goal of no leakage and no structural quality risks at the dewatering well location on the raft foundation. This utility model has advantages such as simple and reasonable structure and low manufacturing cost, making it suitable for widespread application. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a high-water-level dewatering well sealing structure in the soil surrounding a foundation, as described in this application.

[0015] Figure 2 This is a diagram showing the distribution of the eight grouting pipes involved in this application.

[0016] Attached reference numerals: 1-Steel casing; 11-Inner water-stop steel ring; 12-Outer water-stop steel ring; 13-Top sealing plate of steel casing; 2-Sand-free pipe; 3-Cast pipe support; 4-Reinforcing sealing ring reinforcement; 5-Grade 1 grouting pipe; 6-Grade 2 grouting pipe; 7-Grade 3 grouting pipe; 8-Grade 4 grouting pipe; 9-Graded crushed stone layer; 10-Grouting layer; 14-Sealing ring. Detailed Implementation

[0017] To make the technical means, innovative features, objectives and effects of this utility model easier to understand, the utility model will be further described below.

[0018] The embodiments described herein are specific implementations of this utility model, used to illustrate the concept of this utility model. They are all illustrative and exemplary, and should not be construed as limiting the implementation methods or scope of this utility model. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0019] Example 1

[0020] A closed structure for high-water-level dewatering wells within the soil surrounding a foundation, such as Figure 1 and 2 As shown, the system includes a steel casing 1, a sand-free pipe 2, and a casting pipe frame 3 built into the sand-free pipe 2. The inner and outer walls of the steel casing 1 are respectively provided with an inner water-stop steel ring 11 and an outer water-stop steel ring 12. The upper part of the sand-free pipe 2 extends into the steel casing 1, and a sealing ring 14 is provided between the bottom wall of the steel casing 1 and the sand-free pipe 2. The casting pipe frame 3 includes 8 grouting pipes and reinforcing sealing rings 4 for fixing the 8 grouting pipes. The 8 grouting pipes are centrally symmetrically distributed on the same circumference. Two grouting pipes on opposite sides are of the same grade, and the lengths of different grades of grouting pipes are different. Several reinforcing sealing rings 4 are fixed at intervals around the inner circumference of the 8 grouting pipes. If the 8 grouting pipes are named 1#, 4#, 7#, 6#, 8#, 5#, 2#, and 3# in sequence, then the lower part of 1# and 8#... Each of the four reinforcing closed rings 4 should be connected and fixed by one reinforcing closed ring 4 at the bottom. The bottom of each of the four reinforcing closed rings 4 should be connected and fixed by one reinforcing closed ring 4 at the bottom. The bottom of each of the four reinforcing closed rings 4 should be connected and fixed by one reinforcing closed ring 4 at the bottom. That is, there are a total of four reinforcing closed ring 4. All four reinforcing closed ring 4 are located inside the sand-free pipe 2. At the same time, the inner circumference of the grouting pipe of the steel casing 1 should also be fixed by one reinforcing closed ring 4. The eight grouting pipes are divided into four levels of grouting pipes from shortest to longest. The level 1 grouting pipe 5 is 3~4m long, the level 2 grouting pipe 6 is 6.5~7m long, the level 3 grouting pipe 7 is 10~12m long, the level 4 grouting pipe 8 is 12~15m long, and the sand-free pipe 2 is 15~16m long.

[0021] Example 2

[0022] Based on Embodiment 1, the outer water-stop steel ring 12 is located below the inner water-stop steel ring 11, and both have a thickness of 3mm. Compared with the prior art that only sets a water-stop steel ring on the outside, this application also sets an inner water-stop steel ring inside the steel casing, which is a water-stopping measure to solve the gap formed by the drying shrinkage of the concrete in the steel casing and the well shaft.

[0023] Example 3

[0024] Based on Example 1, the grouting pipe is a segmented grouting pipe with a closed pipe wall in the middle and upper parts. Grouting holes are evenly distributed on the pipe wall 1m above the bottom of the grouting pipe. The sand-free pipe 2 should be filled with graded crushed stone to form a graded crushed stone layer 9. The grouting pipe should extend into the graded crushed stone layer 9. The grouting layer 10 is grouting in shape and is the main sealing layer of the dewatering well. The graded crushed stone layer 9 is 2~2.2m high. The 4th grade grouting pipe 8 extends into the graded crushed stone layer 9 for at least 1.5m. The grouting layer 10 is a mixture of water glass and cement. The thickness of the steel casing 1 and the top sealing plate 13 of the steel casing is 6~8mm. The top of the grouting pipe is sealed by welding a 3~4mm steel plate to form a waterstop. The function of welding the waterstop at the grouting pipe opening is to eliminate the possibility of water seepage in the side wall of the grouting pipe after grouting is completed.

[0025] The parts not covered in this utility model are the same as or can be implemented using existing technologies.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A construction for closing a high water level dewatering well in a foundation perimeter soil mass, characterized by: The utility model relates to a kind of steel casing (1), sandless pipe (2) and pouring pipe frame (3) built-in in sandless pipe (2), the inner wall and outer wall of the steel casing (1) are equipped with inner waterstop steel ring (11) and outer waterstop steel ring (12) respectively, sandless pipe (2) upper part is deeply into the inside of steel casing (1), and sealing ring (14) is equipped between the bottom wall of steel casing (1) and sandless pipe (2);Pouring pipe frame (3) includes 8 grouting pipes and the reinforcing closed ring rib (4) for fixing 8 grouting pipes, 8 grouting pipes are centrally symmetrically distributed on the same circumferential line, 8 grouting pipes are located at opposite sides 2 grouting pipes are same level grouting pipe, and different level grouting pipe length is different.

2. A high water level dewatering well closure construction in a foundation perimeter soil mass as claimed in claim 1, characterised in that: The outer waterstop steel ring (12) is located below the inner waterstop steel ring (11), and the thickness is 3mm.

3. A high water level dewatering well closure construction in a foundation perimeter soil mass as claimed in claim 1, characterised in that: The grouting pipe is sectional grouting pipe, and the pipe wall of middle part and upper part is closed pipe wall, and the bottom surface is uniformly distributed with grouting hole upward 1m pipe wall.

4. A high water level dewatering well closure construction in a foundation perimeter soil mass as defined in claim 1, characterized by: 8 grouting pipes are divided into 4 levels of grouting pipes from short to long, 1st level grouting pipe (5) is 3-4m long, 2nd level grouting pipe (6) is 6.5-7m long, 3rd level grouting pipe (7) is 10-12m long, and 4th level grouting pipe (8) is 12-15m long.

5. A high water level dewatering well closure construction in a foundation perimeter soil mass as defined in claim 1, characterized by: The sandless pipe (2) is 15-16m long.

6. A high water level dewatering well closure construction in a foundation perimeter soil mass as defined in claim 4, characterized by: It also includes graded broken stone layer (9) and grouting layer (10) in sandless pipe (2), and the graded broken stone layer (9) is 2-2.2m high;4th level grouting pipe (8) extends into graded broken stone layer (9) at least 1.5m, and grouting layer (10) is the pouring layer of mixture of water glass and cement.

7. The construction for closing the well for high water level lowering in foundation peripheral soil mass according to any one of claims 1 to 6, characterized in that: The thickness of steel casing (1) barrel wall and steel casing top sealing plate (13) is 6-8mm, and the top of grouting pipe is welded and sealed by 3-4mm steel plate.

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