Larsen steel sheet pile

Abstract

The Larsen steel sheet pile comprises a steel sheet pile body, the steel sheet pile body comprises a first steel sheet body, a second steel sheet body and a third steel sheet body, the first steel sheet body, the second steel sheet body and the third steel sheet body are integrally connected, and grouting channels are formed in the middle positions of the two side edges of the second steel sheet body. The grouting channel has the advantages that the bottom of the grouting channel is conical, the whole grouting channel is in a triangular pyramid shape, the contact area between the grouting channel and soil is small, soil side mold resistance and end resistance generated in the downward insertion process of the steel sheet pile are small, downward insertion of the steel sheet pile is not affected, and the inner pipeline of the bottom of the grouting channel is gradually necked down and is similar to the function of a one-way valve. Meanwhile, the end resistance can be reduced; when the steel sheet pile is lifted, grouting can be conducted through connection of the grouting pipeline and an external pipeline, gaps between soil bodies pulled out of the steel sheet pile are filled, and the influence on the surrounding soil bodies and buildings is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, in particular to a Larsen steel sheet pile. Background Art

[0002] Larsen steel sheet piles are recyclable, low in cost, easy to construct and highly efficient, and have great advantages in projects with smaller foundation pit depths.

[0003] 1. For example, a Chinese patent discloses a Larsen steel sheet pile support device (publication number: CN218969973U), which includes at least two Larsen steel sheet piles, the Larsen steel sheet pile includes a web and a U-shaped seat, the web is provided with a first side plate and a second side plate on both sides of the length direction, the first side plate and the second side plate are provided with a first hook and a second hook on the side away from the web, the first hook of the Larsen steel sheet pile is hooked with the second hook of the previous Larsen steel sheet pile, the second hook of the Larsen steel sheet pile is hooked with the first hook of the next Larsen steel sheet pile, and the U-shaped seat includes a first square plate and two second square plates. The purpose is to provide a Larsen steel sheet pile support device with a stable support effect.

[0004] 2. A dewatering Larsen steel sheet pile (publication number: CN216640591U). The dewatering Larsen steel sheet pile according to the embodiment of the utility model includes a dewatering Larsen steel sheet pile, including a Larsen steel sheet pile body; and a dewatering hole, which is arranged on the dewatering Larsen steel sheet pile for dewatering, wherein adjacent dewatering Larsen steel sheet piles are connected by a lock to bear horizontal loads. The dewatering Larsen steel sheet pile according to the embodiment of the utility model has a simple structure, mature construction technology, good dewatering effect, high cost performance, and is convenient for promotion and application.

[0005] However, the proportion of renovation projects has greatly increased. The new foundation pits are often close to existing buildings. The gaps created by traditional Larsen steel sheet piles after pulling out the piles have a greater impact on existing buildings and may affect the safety of existing buildings. This situation hinders the use of Larsen steel sheet piles, and other foundation pit support methods with higher costs and greater impact on the ecological environment are chosen.

[0006] Therefore, it is necessary to propose a Larsen steel sheet pile to solve the above problems. Utility Model Content

[0007] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a Larsen steel sheet pile to solve the above-mentioned problems.

[0008] A Larsen steel sheet pile comprises a steel sheet pile body, wherein the steel sheet pile body comprises a first steel plate body, a second steel plate body and a third steel plate body, wherein the first steel plate body, the second steel plate body and the third steel plate body are integrally connected, and grouting channels are arranged at the middle positions of both sides of the second steel plate body.

[0009] Preferably, a first splicing groove is provided on the outer side of the first steel plate body, and a second splicing groove which cooperates and connects with the first splicing groove is provided on the outer side of the third steel plate body.

[0010] Preferably, the grouting channel comprises a first grouting pipe, a second grouting pipe and a third grouting pipe, and the first grouting pipe is integrally connected with the third grouting pipe through the second grouting pipe.

[0011] Preferably, the outer shapes of the first grouting pipe, the second grouting pipe and the third grouting pipe are all triangular prisms.

[0012] Preferably, a cylindrical hole is opened inside the first grouting pipe, and an internal thread is arranged on the upper part of the cylindrical hole.

[0013] Preferably, the inner channels of the second grouting pipe and the third grouting pipe are triangular.

[0014] Preferably, the inner pipe at the bottom of the third grouting pipe is gradually necked, and the necking length ranges from 30 to 50 mm.

[0015] Preferably, the end surfaces of the first steel plate body and the third steel plate body are both provided with vertical ribs, and the lower tips of the vertical ribs are provided.

[0016] Preferably, the vertical ribs are in the shape of triangular prisms.

[0017] A construction method of Larsen steel sheet piles, the method steps are:

[0018] S1. Produce steel sheet piles and roll the steel sheet pile body into shape in the factory;

[0019] S2, welding a grouting channel in the middle of the second steel plate;

[0020] S3, vertical ribs are welded on the sides of the first steel plate body, the second steel plate body and the third steel plate body.

[0021] S4. When in use, the steel sheet pile bodies are driven into the foundation pit in sequence by a pile driver, and two adjacent steel sheet pile bodies are connected by a splicing groove;

[0022] S5. After the construction of the steel sheet pile body is completed, the grouting channel and the external grouting pipe are injected with slurry to fill the soil voids and reinforce the surrounding soil.

[0023] Compared with the prior art, the utility model has the following beneficial effects: the bottom of the grouting channel of the utility model is conical, and the overall shape is a triangular pyramid, the contact area with the soil is small, the soil side mold resistance and end resistance generated during the insertion of the steel sheet pile are small, and do not affect the insertion of the steel sheet pile, the inner pipe at the bottom of the grouting channel gradually shrinks, similar to the effect of a one-way valve, and the end resistance can be reduced at the same time; while lifting the steel sheet pile, the grouting pipe can be connected to the external pipe for grouting to fill the gaps between the soil from which the steel sheet piles are pulled out, thereby reducing the impact on the surrounding soil and buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of the Larsen steel sheet pile of the utility model;

[0025] Figure 2 It is the front view of the utility model;

[0026] Figure 3 It is a top view schematic diagram of the utility model;

[0027] Figure 4 It is a bottom view of the utility model;

[0028] Figure 5 It is a schematic diagram of the lower part of the steel sheet pile body of the utility model;

[0029] Figure 6 This is the internal structure diagram of the grouting channel of the utility model;

[0030] Figure 7 It is a schematic diagram of the splicing of the steel sheet pile body of the utility model;

[0031] Figure 8 The utility model is a flow chart of the Larsen steel sheet pile construction method.

[0032] Reference numerals in the figure: 1. Steel sheet pile body; 101. First steel plate body; 102. Second steel plate body; 103. Third steel plate body; 104. First splicing groove; 105. Second splicing groove; 106. Vertical ribs; 2. Grouting channel; 201. First grouting pipe; 202. Second grouting pipe; 203. Third grouting pipe; 204. Cylindrical hole; 205. Internal thread. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0034] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0036] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0037] like Figure 1 Combined with Figures 2 to 8 As shown, a Larsen steel sheet pile includes a steel sheet pile body 1, wherein the steel sheet pile body 1 includes a first steel plate body 101, a second steel plate body 102 and a third steel plate body 103, wherein the first steel plate body 101, the second steel plate body 102 and the third steel plate body 103 are integrally connected, and a grouting channel 2 is provided in the middle position of the side of the second steel plate body 102.

[0038] Furthermore, a first splicing groove 104 is provided on the outer side of the first steel plate body 101 , and a second splicing groove 105 which cooperates and connects with the first splicing groove 104 is provided on the outer side of the third steel plate body 03 .

[0039] The further technical solution has the beneficial effect that the first splicing groove 104 and the second splicing groove 105 are connected in coordination, so that the foundation pit support is more stable.

[0040] Furthermore, the grouting channel 2 includes a first grouting pipe 201 , a second grouting pipe 202 and a third grouting pipe 203 , and the first grouting pipe 201 is integrally connected with the third grouting pipe 203 through the second grouting pipe 202 .

[0041] Furthermore, the outer shapes of the first grouting pipe 201, the second grouting pipe 202 and the third grouting pipe 203 are all triangular prisms.

[0042] The further technical solution has the following beneficial effects: the triangular prism-shaped soil has a small contact area, and the soil side mold resistance and end resistance generated during the insertion of the steel sheet pile are small, which does not affect the insertion of the steel sheet pile.

[0043] Furthermore, a cylindrical hole 204 is opened inside the first grouting pipe 201 , and an internal thread 205 is provided on the upper portion of the cylindrical hole 204 .

[0044] The further technical solution has the beneficial effect that the internal thread 205 is convenient for connection with an external grouting pipe.

[0045] Furthermore, the inner passages of the second grouting pipe 202 and the third grouting pipe 203 are triangular.

[0046] Furthermore, the inner pipe at the bottom of the third grouting pipe 203 gradually shrinks, and the shrinkage length ranges from 30 to 50 mm.

[0047] The further technical solution has the beneficial effect of having the same function as the one-way grouting valve and reducing the end resistance at the same time.

[0048] Furthermore, end surfaces of the first steel plate body 101 and the third steel plate body 103 are both provided with vertical ribs 106 .

[0049] The further technical solution has the beneficial effect that the vertical ribs 106 increase the rigidity of the steel plate body, making it less prone to deformation.

[0050] Furthermore, the lower tip of the vertical rib 106 is provided, and the vertical rib 106 is in the shape of a triangular prism.

[0051] The further technical solution has the beneficial effect that the tip setting reduces the resistance and facilitates better insertion.

[0052] Compared with the prior art, the utility model has the following beneficial effects: the bottom of the grouting channel of the utility model is conical, and the overall shape is a triangular pyramid, the contact area with the soil is small, the soil side mold resistance and end resistance generated during the insertion of the steel sheet pile are small, and do not affect the insertion of the steel sheet pile, the inner pipe at the bottom of the grouting channel gradually shrinks, similar to the effect of a one-way valve, and the end resistance can be reduced at the same time; while lifting the steel sheet pile, the grouting pipe can be connected to the external pipe for grouting to fill the gaps between the soil from which the steel sheet piles are pulled out, thereby reducing the impact on the surrounding soil and buildings.

[0053] Example:

[0054] A construction method of Larsen steel sheet piles, the method steps are:

[0055] To produce steel sheet piles, the steel sheet pile body 1 is roll-formed in the factory; a grouting channel is welded in the middle of the second steel plate body 102 of the steel sheet pile body 1; vertical ribs are welded on the sides of the first steel plate body 101, the second steel plate body 102 and the third steel plate body 103; when in use, the steel sheet pile body 1 is driven into the foundation pit in turn by a pile driver, and two adjacent steel sheet pile bodies 1 are connected by a splicing groove; after the construction of the steel sheet pile body 1 is completed, the grouting channel 2 is connected to the external grouting pipe, and slurry is injected to fill the soil voids and reinforce the surrounding soil.

[0056] The first steel plate body 101 , the second steel plate body 102 and the third steel plate body 103 are integrally connected, and a grouting channel 2 is provided in the middle of the side of the second steel plate body 102 .

[0057] The outer side of the first steel plate body 101 is provided with a first splicing groove 104, and the outer side of the third steel plate body 03 is provided with a second splicing groove 105 which is matched and connected with the first splicing groove 104; the first splicing groove 104 and the second splicing groove 105 are matched and connected, so that the foundation pit support is more stable.

[0058] The grouting channel 2 includes a first grouting pipe 201, a second grouting pipe 202 and a third grouting pipe 203. The first grouting pipe 201 is integrally connected with the third grouting pipe 203 through the second grouting pipe 202. The external shapes of the first grouting pipe 201, the second grouting pipe 202 and the third grouting pipe 203 are all triangular prisms. The triangular prism has a small soil contact area, and the soil side mold resistance and end resistance generated during the insertion of the steel sheet piles are small, which does not affect the insertion of the steel sheet piles.

[0059] A cylindrical hole 204 is formed inside the first grouting pipe 201 , and an internal thread 205 is provided on the upper portion of the cylindrical hole 204 ; the internal thread 205 is convenient for connection with an external grouting pipe.

[0060] The inner channels of the second grouting pipe 202 and the third grouting pipe 203 are triangular; the inner pipe at the bottom of the third grouting pipe 203 gradually shrinks, and the shrinking length ranges from 30 to 50 mm; the same as the one-way grouting valve, the end resistance can be reduced at the same time. The lower tip of the vertical rib 106 is set, and the vertical rib 106 is a triangular prism, and the tip is set to reduce resistance, which is convenient for better insertion.

[0061] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A Larsen steel sheet pile, characterized in that: The steel sheet pile body (1) comprises a first steel plate body (101), a second steel plate body (102) and a third steel plate body (103), wherein the first steel plate body (101), the second steel plate body (102) and the third steel plate body (103) are integrally connected, and a grouting channel (2) is provided in the middle of the side of the second steel plate body (102); The outer side of the first steel plate body (101) is provided with a first splicing groove (104), and the outer side of the third steel plate body (103) is provided with a second splicing groove (105) which is matched and connected with the first splicing groove (104); the grouting channel (2) comprises a first grouting pipe (201), a second grouting pipe (202) and a third grouting pipe (203), and the first grouting pipe (201) is integrally connected with the third grouting pipe (203) through the second grouting pipe (202); the first grouting pipe (201) is connected to the third grouting pipe (203) in an integral manner; The outer shapes of the grouting pipe (201), the second grouting pipe (202) and the third grouting pipe (203) are all triangular prisms; a cylindrical hole (204) is opened inside the first grouting pipe (201), and an internal thread (205) is arranged on the upper part of the cylindrical hole (204); the internal channels of the second grouting pipe (202) and the third grouting pipe (203) are triangular; the inner pipe at the bottom of the third grouting pipe (203) is gradually necked, and the necking length range is 30-50 mm.

2. A Larsen steel sheet pile according to claim 1, characterized in that: The end surfaces of the first steel plate body (101) and the third steel plate body (103) are both provided with vertical ribs (106).

3. A Larsen steel sheet pile as claimed in claim 2, characterized in that: The lower tip of the vertical rib (106) is provided, and the vertical rib (106) is in the shape of a triangular prism.

Images