Vertical inclined strut structure of foundation pit

Abstract

The utility model discloses a vertical inclined strut structure of a foundation pit, which comprises a plurality of soil retaining components used for retaining soil on the side wall of the foundation pit, a waist beam which is perpendicular to the plurality of soil retaining components and used for connecting the plurality of soil retaining components, a rigid inclined support beam connected with the waist beam, and a flexible pile arranged under the foundation, the upper end of the rigid inclined supporting beam is connected with the waist beam, the lower end of the rigid inclined supporting beam is inserted into the flexible pile, and a spiral plate can be arranged on the outer wall of the end, inserted into the flexible pile, of the rigid inclined supporting beam. And wide market prospects are achieved in application and popularization of foundation pit supporting.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of foundation pit support, in particular to a vertical bracing structure of foundation pit. BACKGROUND

[0002] In the foundation pit support, vertical bracing is a common means. The prior art is mainly divided into two categories:

[0003] 1. Bearing platform support method: counterforce is provided by the bearing platform, and for this, vertical bracing needs to be installed after the completion of bearing platform construction, which is complicated and time-consuming and laborious;

[0004] 2. Grouting support method: vertical bracing is constructed first, and then grouting is carried out to form a force point, which is difficult to construct and difficult to adapt to complex engineering geological conditions;

[0005] The above methods have problems such as complex process, high construction cost, and poor adaptability to complex foundation, and therefore, there is an urgent need for a vertical bracing inner support structure which is simple in structure, low in cost and suitable for complex foundation. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies of the prior art, the utility model provides a vertical bracing structure of foundation pit, which is simple in structure, convenient to construct, suitable for complex foundation, saves support cost, and has a wide market prospect in the application and popularization of foundation pit support.

[0007] To solve the above technical problems, the utility model adopts the technical scheme of a vertical bracing structure of foundation pit, which comprises: a plurality of soil retaining members for retaining the soil body of the side wall of the foundation pit, a waist beam vertically arranged with the plurality of soil retaining members and used for connecting the plurality of soil retaining members, a steel inclined support beam connected with the waist beam, and a flexible pile arranged under the foundation, wherein the upper end of the steel inclined support beam is connected with the waist beam, the lower end is inserted into the flexible pile, and a spiral plate can be arranged on the outer wall of the end of the steel inclined support beam inserted into the flexible pile.

[0008] In a preferred embodiment of the utility model, the spiral plate is welded to the lower end of the steel inclined support beam, and the length of the spiral plate is close to 1 meter.

[0009] In a preferred embodiment of the utility model, the flexible pile is a high-pressure rotary jet pile, and the inserted lower end of the steel inclined support beam is solidified as a new solidified whole.

[0010] In a preferred embodiment of the utility model, the steel inclined support beam is selected from H-shaped steel or steel pipe.

[0011] In a preferred embodiment of the utility model, the waist beam is an I-beam and is welded and connected with the plurality of soil retaining members.

[0012] In a preferred embodiment of the utility model, the upper end of the steel oblique support beam is welded and connected with the waist beam.

[0013] The utility model discloses the beneficial effect is: simple structure, convenient construction has the advantages such as suitable complex ground, save support cost, has wide market prospect in the application and popularization of foundation pit support. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be to the embodiment description needed to use the drawing briefly introduce, obviously, the following description in the drawing is only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings, wherein:

[0015] Fig. 1 It is the installation schematic drawing of the vertical inclined bracing structure of the utility model foundation pit in the construction site;

[0016] Fig. 2 It is the side view of the lower end of the steel oblique support beam in the vertical inclined bracing structure of the utility model foundation pit without spiral plate;

[0017] Fig. 3 It is the side view of the lower end of the steel oblique support beam in the vertical inclined bracing structure of the utility model foundation pit with spiral plate. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiment of the utility model will be clearly and completely described below, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skilled person in the art without making creative labor belong to the scope of the utility model protection.

[0019] Please refer to Figs. 1-3 The utility model discloses a vertical inclined bracing structure of foundation pit, include: for the soil retaining member 1 of the soil retaining of foundation pit side wall, with the vertical setting of a plurality of soil retaining members and for connecting a plurality of soil retaining members waist beam 2, with the waist beam connection steel oblique support beam 3 and set up in the flexible pile 4 of ground, wherein, with the waist beam connection also can be the steel oblique support beam of bolted, the upper end of steel oblique support beam is connected with the waist beam welding, and the lower end is inserted into the flexible pile, and the pile formed by steel oblique support beam and flexible pile has the complementary reinforcing effect, and is used for vertical inclined bracing in foundation pit support.

[0020] Specifically, the flexible pile is a high-pressure jet grouting pile, which uses jetted high-pressure cement slurry and other media to impact and stir the soil, so that the injected slurry and the soil are mixed and solidified into a new consolidated body.

[0021] Specifically, the steel inclined support beam is generally made of H-shaped steel or steel pipe. When the steel pipe is used, the pipe end is not sealed to reduce the resistance during construction. A spiral plate 5 can be arranged on the outer wall of the end inserted into the flexible pile. The spiral plate is welded to the lower half of the steel inclined support beam and extends upward from the lower end by about one meter in length to increase the resistance of the lower end of the steel inclined support beam. In this way, the length of the steel inclined support beam can be shortened, thereby saving production costs. In a specific embodiment, a Φ300mm steel pipe is used as an example. If a Φ550mm spiral plate is welded to the lower end, the maximum length of the steel inclined support beam can be shortened by about 7m. The steel inclined support beam is constructed using a vibration pressing method or a spinning method. The steel pipe is pressed into the flexible pile by using vibration pressure. When the steel pipe end has a spiral, it is pressed into the flexible pile by using torsional pressure. The steel inclined support beam is constructed before the initial setting of the jet grouting pile. At this time, the soil has not yet completely consolidated, and the soil resistance is not large. Therefore, whether the vibration pressing method or the spinning method is used, the required vibration pressure or torsional pressure is not large, and a strong counterforce does not need to be provided. Therefore, the construction is easy to implement.

[0022] Specifically, the waist beam is an I-beam and is welded to the soil retaining members. The upper end of the steel inclined support beam is welded to the waist beam. The structure is simple and easy to install.

[0023] The utility model has the advantages of simple structure, convenient construction, suitable for complex foundation, saving support cost, and wide market prospect in the application and popularization of foundation pit support.

[0024] The above description is only an embodiment of the utility model, and does not limit the patent range of the utility model. Any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A vertical bracing structure of a foundation pit, characterized by, The application relates to a retaining structure for a foundation pit side wall, which comprises a plurality of retaining members for retaining the soil of the foundation pit side wall, a waist beam vertically arranged with the retaining members and used for connecting the retaining members, a steel inclined support beam connected with the waist beam, and a flexible pile arranged in the foundation, wherein the upper end of the steel inclined support beam is connected with the waist beam, the lower end of the steel inclined support beam is inserted into the flexible pile, and a spiral plate is arranged on the outer wall of the end of the steel inclined support beam inserted into the flexible pile. The spiral plate is welded to the lower end of the steel inclined support beam, and the length of the spiral plate is close to 1m.

2. The vertical bracing structure of a foundation pit according to claim 1, wherein, The flexible pile is a high-pressure rotary jet pile, and the inserted steel inclined support beam and the lower end of the steel inclined support beam are solidified into a new solidified whole.

3. The vertical bracing structure of a foundation pit according to claim 1, wherein, The steel inclined support beam is selected from H-shaped steel or a steel pipe.

4. The vertical bracing structure of a foundation pit according to claim 1, wherein, The waist beam is an I-shaped steel and is welded to the retaining members.

5. The vertical bracing structure of a foundation pit according to claim 1, wherein, The upper end of the steel inclined support beam is welded to the waist beam.

6. The vertical bracing structure of a foundation pit according to claim 1, wherein, ​

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