A subway entrance and exit SMW method pile intrusion treatment method

Abstract

The application discloses a subway entrance and exit SMW method pile intrusion treatment method, and the outer side of the subway entrance and exit is constructed with a row of SMW method piles, and the intrusion treatment method comprises the following steps: H-shaped steel in the SMW method pile at the intrusion position is pulled out; high-pressure rotary jet piles are punched into the earth-facing side of the row of SMW method piles one by one in a one-to-one correspondence, and the first row of high-pressure rotary jet piles is formed; and the pulled-out H-shaped steel is inserted into the high-pressure rotary jet pile corresponding to the SMW method pile at the intrusion position, so that the intrusion is solved through the above intrusion treatment method, and the waterproof performance is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building construction, in particular to a subway portal SMW method pile intrusion treatment method. BACKGROUND

[0002] The subway portal is an important part of the subway station auxiliary structure, not only is the channel for passengers to enter and exit the station, but also connects the external building with the subway station, and as the lifeline of the subway, plays a role in passenger flow evacuation and passenger transfer.

[0003] In soft soil areas, the SMW method pile is often used for the subway portal enclosure structure, and the general method of the SMW method pile is to first construct a triaxial mixing pile, and then insert an H-shaped steel into the pile body. During construction, the SMW method pile intrusion phenomenon often occurs. When the intrusion is serious, the H-shaped steel intrudes into the structure side wall, affecting the construction of the structure side wall. Therefore, effective treatment of SMW method pile intrusion is particularly important.

[0004] The existing SMW method pile intrusion treatment method is generally as follows: removing the H-shaped steel at the intrusion position in situ, and then setting a steel pipe pile outside the intrusion pile position. This method has a large gap between the steel pipe piles, the water stopping effect is general, the waterproof construction of the structure side wall is difficult, the waterproof effect is poor, and the structure side wall is disturbed greatly after the steel pipe pile is removed later. SUMMARY

[0005] The purpose of the present application is to overcome the defects of the prior art, provide a subway portal SMW method pile intrusion treatment method, solve the intrusion, improve the waterproof performance, and avoid water intrusion into the SMW method pile from the soil.

[0006] To achieve the above purpose, the technical solution adopted by the present application is a subway portal SMW method pile intrusion treatment method, the outside of the subway portal is constructed with a row of SMW method piles, and the intrusion treatment method comprises the following steps:

[0007] Step 1: removing the H-shaped steel in the SMW method pile at the intrusion position;

[0008] Step 2: punching a high-pressure jet grouting pile corresponding to each SMW method pile on the soil side of the row of SMW method piles, and forming a first row of high-pressure jet grouting piles;

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

[0010] The further improvement of the subway portal SMW method pile intrusion treatment method of the present application is that when the above step 1 is performed, the H-shaped steel is removed when the concrete of the SMW method pile at the intrusion position has not completed solidification.

[0011] The subway entrance and exit SMW method pile invasion limit treatment method further improves that, when step 2 is performed, the first row of high-pressure jet grouting piles is punched against a row of SMW method piles, and the bottom elevation of the first row of high-pressure jet grouting piles is lower than the bottom elevation of the row of SMW method piles.

[0012] The subway entrance and exit SMW method pile invasion limit treatment method further improves that, after step 3 is performed, a second row of high-pressure jet grouting piles is punched on the soil-facing side of the first row of high-pressure jet grouting piles.

[0013] The subway entrance and exit SMW method pile invasion limit treatment method further improves that, when the second row of high-pressure jet grouting piles is constructed, the second row of high-pressure jet grouting piles is punched against the first row of high-pressure jet grouting piles.

[0014] Compared with the prior art, the subway entrance and exit SMW method pile invasion limit treatment method has the following advantages:

[0015] 1. By punching the first row of high-pressure jet grouting piles on the soil-facing side of a row of SMW method piles and transferring the invaded H-shaped steel into the high-pressure jet grouting piles corresponding to the SMW method piles at the invasion position, the enclosure effect of the SMW method piles is ensured, and the waterproof effect is improved.

[0016] 2. By arranging the second row of high-pressure jet grouting piles, the waterproof effect is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0018] Fig. 1 The processing schematic diagram of the subway entrance and exit SMW method pile invasion limit treatment method of the present application

[0019] Fig. 2 The first row of high-pressure jet grouting piles and the second row of high-pressure jet grouting piles of the subway entrance and exit SMW method pile invasion limit treatment method of the present application.

[0020] In the figure: 1, SMW method pile; 2, first row of high-pressure jet grouting piles; 3, second row of high-pressure jet grouting piles; 4, non-invaded H-shaped steel; 5, invaded H-shaped steel. DETAILED DESCRIPTION

[0021] Following, the embodiments of the present application are illustrated by specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present specification. The present application can also be implemented or applied by other different embodiments, and various modifications or changes can be made to the details in the present specification based on different views and applications without departing from the spirit of the present application.

[0022] The subway portal SMW method pile intrusion treatment method of the present application is further described in detail below in combination with the drawings and specific embodiments.

[0023] Please refer to Figs. 1-2 The subway portal SMW method pile intrusion treatment method, the outside of the subway portal is constructed with a row of SMW method piles 1, and the intrusion treatment method comprises the steps of:

[0024] Step 1: removing the H-shaped steel in the SMW method pile 1a at the intrusion position;

[0025] Step 2: punching into the high-pressure jet grouting pile corresponding to each SMW method pile 1 on the soil-facing side of the row of SMW method piles 1, and forming a first row of high-pressure jet grouting piles 2;

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

[0027] As shown in Fig. 1 and Fig. 2 The H-shaped steel 4 in the row of SMW method piles 1 is not intruded and remains in place; the intruded H-shaped steel 5 in the high-pressure jet grouting pile 2a is removed from the SMW method pile 1a at the intrusion position and transferred to the high-pressure jet grouting pile 2a.

[0028] Specifically, when performing the above-mentioned step 3, the removed H-shaped steel is punched into immediately after the construction of the first row of high-pressure jet grouting piles 2 is completed, so as to avoid the occurrence of the working condition that the H-shaped steel cannot be inserted after the first row of high-pressure jet grouting piles 2 solidifies.

[0029] Preferably, when performing the above-mentioned step 1, the H-shaped steel is removed when the concrete of the SMW method pile 1 at the intrusion position has not yet solidified.

[0030] By limiting the removal time of the intruded H-shaped steel 5, the occurrence of the working condition that the intruded H-shaped steel 5 cannot be removed after the concrete of the SMW method pile 1 solidifies is avoided, and the construction progress is affected.

[0031] Preferably, when performing the above-mentioned step 2, the first row of high-pressure jet grouting piles 2 is punched into against the 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 rotary jet grouting piles 2, the waterproof effect of the row of SMW method piles 1 is ensured.

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

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

[0035] By setting the second row of high-pressure rotary jet grouting piles 3, the waterproof effect of the overall enclosure structure is further improved.

[0036] Preferably, when driving the second row of high-pressure rotary jet grouting piles 3, the second row of high-pressure rotary jet grouting piles 3 is driven against the first row of high-pressure rotary jet grouting piles 2.

[0037] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the conditions that can be implemented by the present application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the present specification are only for the convenience of clear understanding of the description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the implementation of the present application.

[0038] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, and any simple modification, equivalent change and modification of the above embodiment, without departing from the technical content of the present application, are still within the scope of the technical solution of the present application.

Claims

1. A method for treating the intrusion of a SMW method pile at a subway portal, wherein a row of SMW method piles is constructed on the outside of the subway portal, characterized in that, The method comprises the steps of: Step 1: when the concrete of the SMW pile at the intruding position is not completely solidified, the H-shaped steel in the SMW pile at the intruding position is pulled out; Step 2: high-pressure jet grouting piles are punched into the soil corresponding to the SMW piles on the soil-facing side of the SMW piles, and a first row of high-pressure jet grouting piles is formed, so that the first row of high-pressure jet grouting piles is attached to the SMW piles, and the bottom elevation of the first row of high-pressure jet grouting piles is lower than the bottom elevation of the SMW piles; Step 3: the pulled-out H-shaped steel is inserted into the high-pressure jet grouting pile corresponding to the SMW pile at the intruding position.

2. The subway portal SMW method pile intrusion treatment method according to claim 1, characterized by, After Step 3 is performed, a second row of high-pressure jet grouting piles is punched into the soil on the soil-facing side of the first row of high-pressure jet grouting piles.

3. The subway portal SMW method pile intrusion treatment method according to claim 2, characterized by, When the second row of high-pressure jet grouting piles is constructed, the second row of high-pressure jet grouting piles is punched into the soil attached to the first row of high-pressure jet grouting piles.

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