Foundation pit support concrete construction process

Abstract

The invention discloses a foundation pit supporting concrete construction technology. The technology comprises the steps that S1, a foundation pit is subjected to preliminary tamping treatment; s2, setting out and measuring at the bottom of the foundation pit to determine a grooving position; s3, fender posts, an outer supporting plate and an inner supporting plate are installed, and a plurality of infrared sensors are arranged on the inner wall of the inner supporting plate; s4, the fender posts, the outer supporting plates and the inner supporting plates are sequentially connected and fixed; s5, part of concrete and alkali residues are mixed according to a certain proportion and then poured into the space between the outer supporting plate and the inner supporting plate; s6, pre-prepared concrete is poured into the open groove; and S7, foundation pit supporting is completed, and the change condition of the inner supporting plate is monitored in real time. The flatness of the inner surface of the foundation pit supporting structure can be monitored in real time, and the foundation pit supporting effect is prevented from being affected by deformation and abnormal conditions of the supporting structure; in addition, a reinforcing layer can be formed by combining the concrete with the alkaline residues, the supporting structure can be increased, and reasonable resource utilization of the alkaline residues can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a foundation pit supporting concrete construction process. Background Art

[0002] In building construction, it is usually necessary to excavate a foundation pit, which is a soil pit excavated at the foundation design location according to the base elevation and foundation plane size. The foundation pit is mainly used for the construction of abutments, bridge abutments and expanded foundations. Foundation pit support refers to the protection of the safety of the underground main structure construction and the surrounding environment of the foundation pit.

[0003] At present, the structures within the scope of construction projects, including regulating tanks, high-salt water tanks, homogenization tanks, mixing tanks, water distribution tanks, comprehensive water tanks for residual water treatment, residual water treatment discharge tanks, etc., all require foundation pit support. First, a trench is excavated at the bottom of the foundation pit, and a support structure is set up around the trench, and then concrete is poured into the trench for pouring. However, the existing construction process lacks monitoring measures, resulting in the inability to timely detect deformation and abnormal conditions of the support structure or the inability of construction personnel to provide timely feedback, affecting the foundation pit support effect. Summary of the invention

[0004] The purpose of the present invention is to provide a foundation pit supporting concrete construction process to solve the above-mentioned technical problems.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A foundation pit support concrete construction process, comprising:

[0007] S1. Carry out preliminary compaction treatment on the foundation pit;

[0008] S2. Measure and lay out the trench at the bottom of the foundation pit to determine the trenching position, then dig a trench along the laid-out position and place a pre-tied steel mesh inside the trench;

[0009] S3, then opening a placement groove around the slot along the circumferential direction of the foundation pit, and installing the retaining piles, the outer supporting plate and the inner supporting plate in the placement groove from the outside to the inside, and setting a plurality of infrared sensors on the inner wall of the inner supporting plate, and connecting the infrared sensors with external controller signals;

[0010] S4, connecting and fixing the retaining piles, the outer supporting plate and the inner supporting plate in sequence, and then setting staggered cross beams and longitudinal beams on the inner side of the inner supporting plate;

[0011] S5. Mix part of the concrete and alkali slag in a certain proportion and pour them between the outer supporting plate and the inner supporting plate;

[0012] S6, pouring the pre-configured concrete into the slot;

[0013] S7. Complete the foundation pit support and monitor the changes of the inner support plate in real time.

[0014] Preferably, when the foundation pit is preliminarily compacted, the bottom and side walls of the foundation pit need to be compacted, and then leveled after the compaction is completed.

[0015] Preferably, the outer wall of the retaining pile is provided with an anchor rod, and when the retaining pile is installed, the anchor rod is placed into the side wall of the foundation pit.

[0016] Preferably, there is a preset distance between the inner supporting plate and the outer supporting plate, and the size of the preset distance is adjustable.

[0017] Preferably, concrete is mixed with alkali slag and poured between the inner support plate and the outer support plate, and then compacted by a compactor to form a reinforcement layer, and the upper surface of the reinforcement layer is beveled, and the inclination direction of the bevel points to the outside of the foundation pit.

[0018] As a further preference, a drainage ditch is pre-arranged on the periphery of the foundation pit, and a waterproof board is laid on the upper surface of the retaining piles and the reinforcement layer, with the inclination direction of the waterproof board pointing to the drainage ditch.

[0019] As a further preference, after the concrete and alkali slag are mixed and compacted, the flatness of the inner supporting plate is detected so that the inner side surface of the inner supporting plate remains flat.

[0020] Preferably, the infrared sensor includes an infrared transmitter and an infrared receiver, and the infrared transmitter and the infrared receiver are arranged on the inner wall of the inner support plate, and the infrared transmitter and the infrared receiver are opposite to each other, and the infrared receiver is connected to the controller signal.

[0021] The above technical solution has the following advantages or beneficial effects:

[0022] Through the construction process of the present invention, the flatness of the inner surface of the foundation pit support structure can be monitored in real time to avoid deformation and abnormal conditions of the support structure that affect the foundation pit support effect; and a reinforcement layer can be formed by combining concrete with alkali slag, which can increase the condition of the support structure and achieve reasonable resource utilization of the alkali slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flow chart of the foundation pit supporting concrete construction process in the present invention. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 limiting the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 indirectly connected 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 according to specific circumstances.

[0027] Figure 1 This is a flow chart of the foundation pit support concrete construction process in the present invention, please refer to Figure 1 As shown, a preferred embodiment is shown, which shows a foundation pit support concrete construction process, including:

[0028] S1. Carry out preliminary compaction treatment on the foundation pit;

[0029] S2. The bottom of the sub-foundation pit is measured and laid out to determine the trenching position, then a trench is dug along the laid-out position, and a pre-tied steel mesh is placed inside the trench;

[0030] S3, then opening a placement groove around the slot along the circumferential direction of the foundation pit, and installing the retaining piles, the outer supporting plate and the inner supporting plate in the placement groove from the outside to the inside, and setting a plurality of infrared sensors on the inner wall of the inner supporting plate, and connecting the infrared sensors with external controller signals;

[0031] S4, connecting and fixing the retaining piles, the outer supporting plate and the inner supporting plate in sequence, and then setting staggered cross beams and longitudinal beams on the inner side of the inner supporting plate;

[0032] S5. Mix part of the concrete and alkali slag in a certain proportion and pour them between the outer supporting plate and the inner supporting plate;

[0033] S6, pouring the pre-configured concrete into the slot;

[0034] S7. Complete the foundation pit support and monitor the changes of the inner support plate in real time. In this embodiment, the thickness of the inner support plate is greater than the thickness of the outer support plate. When installing the inner support plate and the outer support plate, the gap between the inner support plate and the outer support plate can be pre-set to facilitate the pouring of the mixture of concrete and alkali slag, and a circle of reinforcement layer can be formed between the inner support plate and the outer support plate, thereby improving the stability and firmness of the support in the foundation pit, and realizing the reuse of alkali slag, saving the amount of concrete. Through the setting of infrared sensors, the flatness of the inner side of the inner support plate can be monitored in real time. When the inner side of the inner support plate is deformed, the infrared sensor can send a signal to the controller, and the controller can be connected to an external alarm to issue an alarm prompt, which is convenient for construction personnel to handle in time, prevent deformation and abnormal conditions of the inner support plate or the inability of construction personnel to provide timely feedback, affecting the foundation pit support effect.

[0035] Furthermore, as a preferred embodiment, when the foundation pit is preliminarily compacted, the bottom and side walls of the foundation pit need to be compacted, and then leveled after compaction. Anchor rods are provided on the outer walls of the retaining piles. When installing the retaining piles, the anchor rods are placed in the side walls of the foundation pit, wherein the anchor rods can be T-shaped rods, which can play a role in stabilizing the connection, and can transfer the force applied by the side walls of the foundation pit to the retaining piles through the anchor rods. The retaining piles are the first line of defense, which prevents the foundation pit from directly contacting the outer support plate and realizes the protection of the outer support plate.

[0036] In this embodiment, during the construction process, it is necessary to observe the water level inside the foundation pit to avoid water seepage or rainwater accumulation. If water seepage or rainwater accumulation occurs, the water inside the foundation pit needs to be pumped out in time.

[0037] Further, as a preferred embodiment, there is a preset spacing between the inner supporting plate and the outer supporting plate, and the size of the preset spacing is adjustable. The inner supporting plate and the outer supporting plate can be connected by a screw assembly, and the spacing between the inner supporting plate and the outer supporting plate can be adjusted by rotating the screw assembly, so as to control the thickness of the reinforcement layer.

[0038] Furthermore, as a preferred embodiment, concrete is mixed with alkali residue and poured between the inner support plate and the outer support plate, and then compacted by a compactor to form a reinforcement layer, and the upper surface of the reinforcement layer is inclined, and the inclination direction of the inclined surface points to the outside of the foundation pit. Setting the upper surface of the reinforcement layer as an inclined surface, and the inclined surface pointing to the outside of the foundation pit, can achieve a backflow effect, and guide rainwater to the outside of the foundation pit.

[0039] Furthermore, as a preferred embodiment, a drainage ditch is pre-set around the foundation pit, and a waterproof board is laid on the upper surface of the retaining piles and the reinforcement layer, with the inclination direction of the waterproof board pointing to the drainage ditch. The waterproof board is set to prevent rainwater from entering, and the water around the foundation pit can be directly drained through the drainage ditch.

[0040] Furthermore, as a preferred implementation, after the concrete and alkali slag are mixed and compacted, the flatness of the inner supporting plate is detected so that the inner side surface of the inner supporting plate remains flat.

[0041] Furthermore, as a preferred embodiment, the infrared sensor includes an infrared transmitter and an infrared receiver, and the infrared transmitter and the infrared receiver are arranged on the inner wall of the inner support plate, and the infrared transmitter and the infrared receiver are directly opposite to each other, and the infrared receiver is connected to the controller signal. When the infrared receiver cannot receive the light emitted by the infrared transmitter, it means that the inner support plate in the area between the infrared transmitter and the infrared receiver has been deformed. At this time, the infrared receiver will send a signal to the controller, and the controller will control the external alarm to issue an alarm prompt, so that the construction personnel can handle it in time.

[0042] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A foundation pit support concrete construction process, characterized in that: include: S1. Carry out preliminary compaction treatment on the foundation pit; S2. Measure and lay out the trench at the bottom of the foundation pit to determine the trenching position, then dig a trench along the laid-out position and place a pre-tied steel mesh inside the trench; S3, then opening a placement groove around the slot along the circumferential direction of the foundation pit, and installing the retaining piles, the outer supporting plate and the inner supporting plate in the placement groove from the outside to the inside, and setting a plurality of infrared sensors on the inner wall of the inner supporting plate, and connecting the infrared sensors with external controller signals; S4, connecting and fixing the retaining piles, the outer supporting plate and the inner supporting plate in sequence, and then setting staggered cross beams and longitudinal beams on the inner side of the inner supporting plate; S5. Mix part of the concrete and alkali slag in a certain proportion and pour them between the outer supporting plate and the inner supporting plate; S6, pouring the pre-configured concrete into the slot; S7. Complete the foundation pit support and monitor the changes of the inner support plate in real time.

2. The foundation pit support concrete construction process according to claim 1, characterized in that: When the foundation pit is initially compacted, the bottom and side walls of the foundation pit need to be compacted, and then leveled after compaction is completed.

3. The foundation pit support concrete construction process according to claim 1, characterized in that: The outer wall of the retaining pile is provided with an anchor rod. When installing the retaining pile, the anchor rod is placed into the side wall of the foundation pit.

4. The foundation pit support concrete construction process according to claim 1, characterized in that: There is a preset distance between the inner supporting plate and the outer supporting plate, and the size of the preset distance is adjustable.

5. The foundation pit support concrete construction process according to claim 1, characterized in that: Concrete is mixed with alkali slag and poured between the inner support plate and the outer support plate. It is then compacted by a compactor to form a reinforcement layer. The upper surface of the reinforcement layer is beveled, and the inclination direction of the bevel points to the outside of the foundation pit.

6. The foundation pit support concrete construction process according to claim 5, characterized in that: A drainage ditch is pre-set on the periphery of the foundation pit, and a waterproof board is laid on the upper surface of the retaining piles and the reinforcement layer, with the inclination direction of the waterproof board pointing to the drainage ditch.

7. The foundation pit support concrete construction process according to claim 5, characterized in that: After the concrete and alkali slag are mixed and compacted, the flatness of the inner support plate is checked to ensure that the inner side of the inner support plate remains flat.

8. The foundation pit support concrete construction process according to claim 1, characterized in that: The infrared sensor comprises an infrared transmitter and an infrared receiver. The infrared transmitter and the infrared receiver are arranged on the inner wall of the inner support plate, and the infrared transmitter and the infrared receiver are opposite to each other, and the infrared receiver is connected with the controller signal.

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