Subway entrance and exit SMW construction method pile invasion treatment method

Abstract

The invention discloses a metro entrance and exit SMW construction method pile invasion treatment method, a row of SMW construction method piles are constructed on the outer side of a metro entrance and exit, and the invasion treatment method comprises the steps that H-shaped steel in the SMW construction method piles at the invasion position is pulled out; high-pressure jet grouting piles are driven into the soil facing sides of the row of SMW construction method piles in a one-to-one correspondence mode, and a first row of high-pressure jet grouting piles are formed; and the pulled-out H-shaped steel is inserted into the high-pressure jet grouting pile corresponding to the SMW construction method pile at the invasion limit position, and the waterproof performance is improved while invasion limit is solved through the invasion limit treatment method.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a method for treating the intrusion limit of SMW construction method piles at a subway entrance and exit. Background Art

[0002] Subway entrances and exits, as an important part of the subway station's auxiliary structure, are not only passages for passengers to enter and exit the station, but also connect external buildings with the subway station. As the lifeline of the subway, it can play a role in evacuating passenger flow and passenger transfer.

[0003] In soft soil areas, SMW piles are often used in subway entrance and exit retaining structures. The general practice of SMW piles is to first construct three-axis mixing piles, and then insert H-shaped steel into the pile body. During the construction process, SMW pile intrusion often occurs. When the intrusion is serious, the H-shaped steel intrudes into the side wall of the structure, affecting the construction of the side wall of the structure. Therefore, effective treatment of SMW pile intrusion is particularly important.

[0004] The existing SMW construction method for pile intrusion treatment is generally: remove the H-shaped steel at the intrusion limit in situ, and then drive steel pipe piles outside the intrusion limit pile position. This method has large gaps between steel pipe piles, and the water-stopping effect is general. The waterproof construction of the structural side wall is difficult, the waterproof effect is poor, and the removal of the steel pipe piles at a later stage causes a large disturbance to the structural side wall. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a method for treating the intrusion of SMW piles at subway entrances and exits, which can solve the problem of intrusion while improving the waterproof performance and preventing water in the soil from intruding into the SMW piles.

[0006] To achieve the above object, the technical solution adopted by the present invention is a method for treating the limit intrusion of SMW construction piles at subway entrances and exits. A row of SMW construction piles is constructed outside the subway entrances and exits. The limit intrusion treatment method comprises the following steps:

[0007] Step 1: Remove the H-shaped steel in the SMW pile at the limit position;

[0008] Step 2: High-pressure jet grouting piles are driven one by one into the soil-facing side of a row of SMW construction method piles to form the first row of high-pressure jet grouting piles;

[0009] Step 3: insert the removed H-shaped steel into the high-pressure jet grouting pile corresponding to the SMW construction method pile at the intrusion limit position.

[0010] A further improvement of the method for treating the intrusion of SMW piles at subway entrances and exits of the present invention is that, when executing the above step 1, the H-shaped steel is removed before the concrete of the SMW piles at the intrusion position has not completely solidified.

[0011] A further improvement of the method for treating SMW construction pile encroachment at subway entrances and exits of the present invention is that, when executing the above step 2, the first row of high-pressure rotary jet piles are driven in close to a row of SMW construction piles, so that the bottom elevation of the first row of high-pressure rotary jet piles is lower than the bottom elevation of a row of SMW construction piles.

[0012] A further improvement of the subway entrance and exit SMW pile encroachment treatment method of the present invention is that after executing the above step 3, a second row of high-pressure rotary jet piles is driven into the soil-facing side of the first row of high-pressure rotary jet piles.

[0013] A further improvement of the subway entrance and exit SMW construction method pile encroachment treatment method of the present invention is that when constructing the second row of high-pressure rotary jet piles, the second row of high-pressure rotary jet piles are driven in close to the first row of high-pressure rotary jet piles.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] 1. By driving the first row of high-pressure jet grouting piles on the soil-facing side of a row of SMW construction method piles, and transferring the intruding H-shaped steel to the high-pressure jet grouting piles corresponding to the SMW construction method piles at the intruding position, the enclosure effect of the SMW construction method piles is ensured while improving the waterproof effect.

[0016] 2. The waterproofing effect is further improved by setting up a second row of high-pressure jet jet piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 Schematic diagram of the SMW pile intrusion limit treatment method for subway entrances and exits of the present invention

[0019] Figure 2 It is a schematic diagram of the first row of high-pressure rotary jet piles and the second row of high-pressure rotary jet piles of the subway entrance and exit SMW method pile intrusion limit treatment method of the present invention.

[0020] In the figure: 1. SMW method piles; 2. The first row of high-pressure rotary jet piles; 3. The second row of high-pressure rotary jet piles; 4. H-shaped steel without intrusion; 5. H-shaped steel with intrusion. DETAILED DESCRIPTION

[0021] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0022] The following is a further detailed description of the SMW pile intrusion treatment method for subway entrances and exits of the present invention in conjunction with the accompanying drawings and specific embodiments.

[0023] See also Figure 1-2 As shown, a method for treating the limit intrusion of SMW construction piles at a subway entrance and exit is provided. A row of SMW construction piles 1 is constructed outside the subway entrance and exit. The method for treating the limit intrusion comprises the following steps:

[0024] Step 1: Remove the H-shaped steel in the SMW pile 1a at the limit position;

[0025] Step 2: High-pressure jet grouting piles are driven one by one into the soil facing side of a row of SMW construction method piles 1 to form a first row of high-pressure jet grouting piles 2;

[0026] Step 3: insert the removed H-shaped steel into the high-pressure jet grouting pile corresponding to the SMW method pile 1 at the intrusion limit position.

[0027] like Figure 1 and Figure 2 As shown, the H-beams 4 in a row of SMW piles 1 that are not intruded are still kept in place; the H-beams 5 in the high-pressure rotary jet piles 2a that are intruded are pulled out from the SMW piles 1a at the intrusion position and transferred to the high-pressure rotary jet piles 2a.

[0028] Specifically, when executing the above step 3, the removed H-shaped steel should be driven in immediately after the construction of the first row of high-pressure jet grouting piles 2 is completed, so as to avoid the situation where the H-shaped steel cannot be inserted after the first row of high-pressure jet grouting piles 2 solidifies.

[0029] Preferably, when executing the above step 1, the H-shaped steel is removed before the concrete of the SMW method pile 1 at the limit position is completely solidified.

[0030] By limiting the removal time of the H-shaped steel 5 that has intruded into the limit, it is avoided that the H-shaped steel 5 that has intruded into the limit cannot be removed after the concrete of the SMW construction method pile 1 has solidified, thereby preventing the construction progress from being affected.

[0031] Preferably, when executing the above step 2, the first row of high-pressure jet grouting piles 2 is driven close to a row of SMW method piles 1 so that the bottom elevation of the first row of high-pressure jet grouting piles 2 is lower than the bottom elevation of the row of SMW method piles 1.

[0032] By limiting the position and height of the first row of high-pressure jet grouting piles 2 , the waterproof effect of a row of SMW construction method piles 1 is ensured.

[0033] Preferably, after executing the above step 3, a second row of high-pressure jet grouting piles 3 is driven into the soil-facing side of the first row of high-pressure jet grouting piles 2.

[0034] Specifically, when the second row of high-pressure jet grouting piles 3 are driven in, the bottom elevation of the second row of high-pressure jet grouting piles 3 is made lower than that of the first row of high-pressure jet grouting piles 2 .

[0035] By providing the second row of high-pressure jet-jet piles 3, the overall waterproofing effect of the enclosure structure is further improved.

[0036] Preferably, when constructing the second row of high-pressure rotary jet piles 3 , the second row of high-pressure rotary jet piles 3 are driven in close to the first row of high-pressure rotary jet piles 2 .

[0037] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0038] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for treating the intrusion limit of SMW construction piles at a subway entrance and exit, wherein a row of SMW construction piles is constructed outside the subway entrance and exit, and the method is characterized in that: The infringement treatment method comprises the steps of: Step 1: Remove the H-shaped steel in the SMW pile at the limit position; Step 2: High-pressure jet grouting piles are driven one by one into the soil-facing side of a row of SMW construction method piles to form the first row of high-pressure jet grouting piles; Step 3: insert the removed H-shaped steel into the high-pressure jet grouting pile corresponding to the SMW method pile at the intrusion limit position.

2. The subway entrance and exit SMW construction method pile intrusion limit treatment method according to claim 1, characterized in that: When executing the above step 1, the H-shaped steel is removed before the concrete of the SMW method pile at the limit position is completely solidified.

3. The method for treating the intrusion limit of SMW piles at subway entrances and exits as claimed in claim 2, characterized in that: When executing the above step 2, the first row of high-pressure jet grouting piles is driven close to a row of SMW construction method piles, so that the bottom elevation of the first row of high-pressure jet grouting piles is lower than the bottom elevation of the row of SMW construction method piles.

4. The subway entrance and exit SMW construction method pile intrusion limit treatment method according to claim 1, characterized in that: After executing the above step 3, a second row of high-pressure jet grouting piles is driven into the soil-facing side of the first row of high-pressure jet grouting piles.

5. The method for treating the intrusion limit of SMW piles at subway entrances and exits as claimed in claim 4, characterized in that: When constructing the second row of high-pressure rotary jet piles, the second row of high-pressure rotary jet piles are driven in close to the first row of high-pressure rotary jet piles.

Images