Mud flat soft soil reinforcement process, structure and device

Abstract

The invention discloses a mud flat soft soil reinforcing process which comprises the following steps: firstly, setting a mud flat reinforcing range, and then vertically driving a plurality of reinforcing pile foundations with divergent root structures into a soft soil layer in the mud flat reinforcing range in an enclosed array or uniform array layout mode; a plurality of reinforcing pile foundations which are driven into the soft soil layer and provided with diverging root systems enclose the set mud flat reinforcing range or are evenly distributed in the set mud flat reinforcing range; and the root system arms which are distributed in a divergent manner and are obliquely and transversely embedded in the soft soil layer reversely disperse the load of the soft soil layer on the reinforced pile foundation to a wider soil layer, so that the displacement of the reinforced pile foundation and the deformation of the soft soil layer are reduced.

Description

Technical Field

[0001] The invention belongs to the field of pile foundation type soft soil reinforcement. Background Art

[0002] The use of array pile foundation reinforcement on tidal flat soft soil structures can effectively enhance the stability of the soft soil foundation and prevent the soft soil layer in the target range from sliding or becoming unstable under load, thereby achieving reinforcement of the soft soil. Due to the soft texture and easy deformation of the soft soil structure itself, traditional pile foundation technology is still prone to displacement and deflection under the action of external force loads in the soft soil layer, so it is necessary to develop a new pile foundation structure and supporting technology. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a process, structure and device for reinforcing soft soil in tidal flats, wherein the root arms are dispersedly distributed and obliquely embedded in the soft soil layer, which in turn disperse the load of the soft soil layer on the reinforced pile foundation into a wider soil layer, thereby reducing the eccentricity of the reinforced pile foundation and the deformation of the soft soil.

[0004] Technical solution: To achieve the above-mentioned purpose, a tidal flat soft soil reinforcement process of the present invention first sets the tidal flat reinforcement range, and then vertically drives a plurality of reinforcement pile foundations with divergent root structures into the soft soil layer within the tidal flat reinforcement range in an enclosed array or a uniform array layout, so that the plurality of reinforcement pile foundations with divergent root systems driven into the soft soil layer enclose the set tidal flat reinforcement range or are evenly distributed in the set tidal flat reinforcement range.

[0005] Furthermore, it includes a metal pile body skeleton with a "cross"-shaped cross-section, the lower end of the metal pile body skeleton is integrally connected with a pointed cone-shaped pile head, the outer periphery of the lower end of the metal pile body skeleton is circumferentially arranged with a plurality of root arms, the root of each root arm is hinged to the metal pile body skeleton, and the end of each of the plurality of root arms is integrally arranged with a flat blade head; the upper end contour edge of the pointed cone-shaped pile head is provided with blade head grooves in a circular array, and each blade head groove corresponds to a flat blade head.

[0006] Further, the reinforced pile foundation structure with divergent roots includes a state before being driven into the soft soil and a state after being driven into the soft soil and completed pouring;

[0007] Before being driven into the soft soil: each root arm naturally droops around the hinged part under the action of gravity, so that the tail of the flat blade head at the end of each root arm is stuck in the corresponding blade head groove, and the head of the flat blade head stuck in the corresponding blade head groove protrudes obliquely downward and is exposed outside the upper outer cone surface of the pointed cone pile head;

[0008] In the state after being driven into the soft soil and pouring is completed: each root arm is swung upward at a certain angle around the hinge part relative to the "state before being driven into the soft soil", so that several root arms are distributed divergently and embedded in the soft soil layer, and concrete columns are poured around the outer periphery of the "cross" shaped metal pile body skeleton, and the concrete columns cast and fix the roots of several root arms as a whole and form an integral part with the "cross" shaped metal pile body skeleton.

[0009] Furthermore, the outer diameter of the concrete column is consistent with the outer diameter of the upper end of the conical pile head, and they are coaxial with each other.

[0010] Furthermore, a hinge shaft is provided at the root of each root arm, and the hinge shaft is rotatably matched with a hinge hole on the metal pile body skeleton.

[0011] Furthermore, it comprises an auxiliary pile barrel, and a lifting device is connected to an outer edge of an upper end of the auxiliary pile barrel; and the outer diameter of the auxiliary pile barrel is consistent with the outer diameter of the upper end of the pointed cone-shaped pile head.

[0012] Furthermore, before driving into the soft soil: the auxiliary pile barrel is sleeved outside the metal pile body skeleton, and the lower end of the auxiliary pile barrel is in coaxial limiting contact with the upper end of the pointed cone-shaped pile head; the auxiliary pile barrel and the pointed cone-shaped pile head are spliced ​​into a pointed column structure with the pointed head facing downward; the upper side of each flat blade head is provided with a contour edge, and the contour edge is adapted to the inner contour of the lower end of the auxiliary pile barrel; when the auxiliary pile barrel and the pointed cone-shaped pile head are in coaxial splicing, the inner contour of the lower end of the auxiliary pile barrel presses against the contour edge on the upper side of each flat blade head, thereby preventing the root arm from swinging upward at this time.

[0013] Furthermore, the auxiliary piling process of the auxiliary device for reinforcing the pile foundation structure with divergent roots is characterized by comprising the following steps:

[0014] Step 1: The pointed column structure with the pointed head facing downward formed by splicing the auxiliary pile tube and the pointed cone pile head is inserted downward into the soft soil layer to a certain depth as a whole;

[0015] Step 2: Pull out the auxiliary pile from the soft soil layer and transfer it upward;

[0016] Step 3: Apply downward force to the metal pile skeleton, so that the pointed cone pile head continues to move downward, so that the root arms that were originally in a drooping state swing upward relatively to be distributed in a divergent manner and are obliquely and horizontally embedded in the soft soil layer, forming a "root structure" of the metal pile skeleton;

[0017] Step 4: pour concrete into the pouring bin.

[0018] Beneficial effects: The reinforced pile foundation with a divergent root structure of the present invention effectively improves the firmness of the pile foundation mechanism in soft soil like the root structure of a plant, and effectively prevents the reinforced pile foundation from being displaced and deflected in the soft soil layer; at the same time, the root arms that are divergently distributed and obliquely embedded in the soft soil layer in turn disperse the load of the soft soil layer on the reinforced pile foundation to a wider soil layer, thereby reducing the eccentricity of the reinforced pile foundation and the deformation of the soft soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of "step one" to "step four";

[0020] Figure 2 A pointed column structure with the pointed head facing downwards, formed by splicing the auxiliary pile tube and the pointed cone pile head;

[0021] Figure 3 for Figure 2 A partial enlarged schematic diagram of the lower part;

[0022] Figure 4 For Figure 3 Schematic diagram of the auxiliary pile tube independently moving upward and separating from the pointed cone pile head;

[0023] Figure 5 It is a schematic diagram of several root arm drooping states;

[0024] Figure 6 It is a schematic diagram of several root system arms that were originally in a drooping state swinging upward relatively to form a divergent and scattered distribution;

[0025] Figure 7 for Figure 6 The disassembly diagram of the lower part;

[0026] Figure 8 Schematic diagram of the complete reinforced pile foundation structure. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] As attached Figures 1 to 8A tidal flat soft soil reinforcement process is shown, firstly setting the tidal flat reinforcement range, and then vertically driving a plurality of reinforcement pile foundations 60 with a divergent root system structure into the soft soil layer 3 in the tidal flat reinforcement range in an enclosed array or uniform array layout, so that the plurality of reinforcement pile foundations 60 with a divergent root system driven into the soft soil layer 3 enclose the set tidal flat reinforcement range or are uniformly distributed in the set tidal flat reinforcement range. The array pile foundation reinforcement method can effectively enhance the stability of the soft soil foundation, prevent the soft soil layer in the target range from sliding or becoming unstable under the action of load, thereby realizing the reinforcement of the soft soil, and the reinforcement of the divergent root system The reinforced pile foundation 60 with a divergent root structure is like a plant root structure in soft soil, which effectively improves the firmness of the pile foundation mechanism and effectively prevents the reinforced pile foundation from displacement and deflection in the soft soil layer; at the same time, the root arms that are distributed in a divergent manner and obliquely embedded in the soft soil layer in turn disperse the load of the soft soil layer on the reinforced pile foundation to a wider soil layer, thereby reducing the ectopicity of the reinforced pile foundation and the deformation of the soft soil. However, this kind of reinforced pile foundation 60 with a root structure is not easy to be driven smoothly by a conventional piling process, which requires a new design, new process and new structure to be implemented in this case, as described below:

[0029] In terms of structure, Figure 5 and 6 As shown, the reinforced pile foundation 60 includes a metal pile body skeleton 4 with a "cross"-shaped cross-section, and a pointed cone-shaped pile head 7 is integrally connected to the lower end of the metal pile body skeleton 4. A plurality of root arms 9 are arranged in a circular array on the outer periphery of the lower end of the metal pile body skeleton 4. The root of each root arm 9 is hinged on the metal pile body skeleton 4, and a flat blade head 8 is integrally arranged at the end of each of the plurality of root arms 9; the upper end contour edge of the pointed cone-shaped pile head 7 is provided with blade head grooves 15 in a circular array, and each blade head groove 15 corresponds to a flat blade head 8.

[0030] The reinforced pile foundation structure with divergent roots includes the state before being driven into soft soil (such as Figure 5 ) and the state after the soft soil is driven in and the pouring is completed (such as Figure 8 );

[0031] Before being driven into the soft soil: each root arm 9 naturally droops around the hinged part under the action of gravity, so that the tail of the flat blade head 8 at the end of each root arm 9 is stuck in the corresponding blade head groove 15, and the head of the flat blade head 8 with the tail stuck in the corresponding blade head groove 15 protrudes obliquely downward and is exposed outside the upper outer cone surface of the pointed cone-shaped pile head 7.

[0032] In the state after being driven into the soft soil and pouring is completed: each root arm 9 is swung upward at a certain angle around the hinged part relative to the "state before being driven into the soft soil", so that several root arms 9 are distributed divergently and embedded in the soft soil layer 3, and a concrete column 11 is poured on the outer periphery of the "cross"-shaped metal pile body skeleton 4. The concrete column 11 casts and fixes the roots of several root arms 9 as a whole and is connected to the "cross"-shaped metal pile body skeleton 4 as a whole; the outer diameter of the concrete column 11 is consistent with the outer diameter of the upper end of the conical pile head 7, and they are coaxial with each other.

[0033] like Figure 7 As shown, a hinge shaft 14 is provided at the root of each root tie arm 9 , and the hinge shaft 14 is rotatably matched with a hinge hole 13 on the metal pile body skeleton 4 .

[0034] like Figure 2 , 3 4 also includes an auxiliary pile tube 6, and a lifting device 2 is connected to the integral outer edge 5 of the upper end of the auxiliary pile tube 6; the outer diameter of the auxiliary pile tube 6 is consistent with the outer diameter of the upper end of the pointed cone-shaped pile head 7.

[0035] Before driving into soft soil: Figure 2 and 3 As shown, the auxiliary pile barrel 6 is sleeved outside the metal pile body skeleton 4, and the lower end of the auxiliary pile barrel 6 is in coaxial limiting contact with the upper end of the pointed cone-shaped pile head 7; the auxiliary pile barrel 6 and the pointed cone-shaped pile head 7 are spliced ​​into a pointed column structure 61 with the pointed head facing downward; the upper side of each flat blade head 8 is provided with a contour edge 16, and the contour edge 16 is adapted to the inner contour of the lower end of the auxiliary pile barrel 6; when the auxiliary pile barrel 6 and the pointed cone-shaped pile head 7 are in a coaxial splicing state, the inner contour of the lower end of the auxiliary pile barrel 6 presses against the contour edge 16 on the upper side of each flat blade head 8, thereby preventing the root arm 9 from swinging upward at this time.

[0036] Auxiliary piling process with auxiliary devices for reinforced pile foundation structures with divergent root systems, such as Figure 1 As shown, the following steps are included:

[0037] Step 1: The auxiliary pile barrel 6 is sleeved outside the vertical metal pile body frame 4, and the lower end of the auxiliary pile barrel 6 is in coaxial limited contact with the upper end of the pointed cone pile head 7; the auxiliary pile barrel 6 and the pointed cone pile head 7 are spliced ​​into a pointed column structure 61 with the pointed head facing downward, at this time, the inner contour of the lower end of the auxiliary pile barrel 6 presses against the contour edge 16 on the upper side of each flat blade head 8, so that the root arm 9 in the drooping state at this time cannot swing upward; then the pointed column structure 61 with the pointed head facing downward formed by the auxiliary pile barrel 6 and the pointed cone pile head 7 is facing downward;

[0038] Then the pile hammer 1 of the pile driver applies a downward force to the top of the metal pile frame 4, and at the same time the lifting device also applies a downward force to the upper section of the auxiliary pile tube 6; so that the pointed column structure 61 with the pointed head facing downward, which is formed by splicing the auxiliary pile tube 6 and the pointed cone-shaped pile head 7, is inserted downward into the soft soil layer 3 as a whole to a certain depth;

[0039] Step 2: The auxiliary pile tube 6 is pulled out and transferred upward from the soft soil layer 3 by the lifting device 2, and the pointed cone pile head 7 and the metal pile body skeleton 4 are still retained in the soft soil layer 3. At this time, a columnar casting bin 10 is formed around the metal pile body skeleton 4; the pointed cone pile head 7 is wrapped by compact soft soil;

[0040] Step 3, the pile hammer 1 continues to exert a downward force on the metal pile body skeleton 4, so that the pointed cone pile head 7 continues to move downward, and the compact soft soil around the pointed cone pile head 7 forms an upward force on the flat blade head 8 that protrudes obliquely downward and is exposed outside the outer cone surface of the pointed cone pile head 7 under the action of the interaction force, so that during the process of the metal pile body skeleton 4 and the pointed cone pile head 7 further slowly moving downward, the root arm 9 gradually swings upward relatively around the hinged part of the root, so that the flat blade head 8 gradually penetrates horizontally into the soft soil 3 around the metal pile body skeleton 4, and the root arms 9 that were originally in a drooping state swing upward relatively to be scattered and distributed in a divergent shape and are obliquely and horizontally embedded in the soft soil layer 3, forming a "root structure" of the metal pile body skeleton 4;

[0041] Step 4: The pouring device pours concrete into the pouring bin 10, so that the pouring bin 10 on the outer periphery of the "cross"-shaped metal pile body skeleton 4 becomes a concrete column 11. The concrete column 11 integrally casts and fixes the roots of several root arms 9 and integrates them with the "cross"-shaped metal pile body skeleton 4 to form a reinforced pile foundation 60 with a divergent root structure; the reinforced pile foundation 60 with a divergent root structure effectively improves the firmness of the pile foundation mechanism in the soft soil like the root structure of a plant, and effectively prevents the reinforced pile foundation 60 from being displaced and deflected in the soft soft soil layer 3; at the same time, the root arms 9 that are divergently distributed and obliquely embedded in the soft soil layer 3 in turn disperse the load of the soft soil layer 3 on the reinforced pile foundation 60 to a wider soil layer, thereby reducing the eccentricity of the reinforced pile foundation 60 and the deformation of the soft soil.

[0042] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A tidal flat soft soil reinforcement process, characterized in that: First, a tidal flat reinforcement range is set, and then a plurality of reinforcement pile foundations (60) with divergent root systems are vertically driven into a soft soil layer (3) within the tidal flat reinforcement range in an enclosed array or uniform array layout, so that the plurality of reinforcement pile foundations (60) with divergent root systems driven into the soft soil layer (3) enclose the set tidal flat reinforcement range or are uniformly distributed within the set tidal flat reinforcement range.

2. A reinforced pile foundation structure with a divergent root system, characterized in that: The invention comprises a metal pile frame (4) with a "cross" shaped cross section, wherein the lower end of the metal pile frame (4) is integrally connected with a pointed cone pile head (7), and the outer periphery of the lower end of the metal pile frame (4) is provided with a plurality of root arms (9) arranged in a circular array, the root of each root arm (9) is hinged on the metal pile frame (4), and the end of each of the plurality of root arms (9) is integrally provided with a flat blade head (8); the upper end contour edge of the pointed cone pile head (7) is provided with blade head grooves (15) in a circular array, and each blade head groove (15) corresponds to a flat blade head (8).

3. A reinforced pile foundation structure with divergent roots according to claim 2, characterized in that: The reinforced pile foundation structure with divergent root system includes the state before being driven into the soft soil and the state after being driven into the soft soil and poured; Before being driven into the soft soil: each root arm (9) naturally droops around the hinged part under the action of gravity, so that the tail of the flat blade head (8) at the end of each root arm (9) is stuck in the corresponding blade head groove (15), and the head of the flat blade head (8) with the tail stuck in the corresponding blade head groove (15) protrudes obliquely downward and is exposed outside the upper outer cone surface of the pointed cone pile head (7); In the state after being driven into the soft soil and poured: each root arm (9) swings upward at a certain angle around the hinged part relative to the "state before being driven into the soft soil", so that a plurality of root arms (9) are distributed in a divergent manner and embedded in the soft soil layer (3), and a concrete column (11) is poured around the outer periphery of the "cross" shaped metal pile body skeleton (4), and the concrete column (11) integrally casts and fixes the roots of the plurality of root arms (9) and is integrated with the "cross" shaped metal pile body skeleton (4).

4. A reinforced pile foundation structure with divergent roots according to claim 3, characterized in that: The outer diameter of the concrete column (11) is consistent with the outer diameter of the upper end of the pointed cone pile head (7), and they are coaxial with each other.

5. A reinforced pile foundation structure with divergent roots according to claim 4, characterized in that: A hinge shaft (14) is provided at the root of each root arm (9), and the hinge shaft (13) is rotatably matched with a hinge hole (13) on the metal pile body frame (4).

6. The auxiliary device for reinforcing a pile foundation structure with a divergent root system according to claim 5, characterized in that: It comprises an auxiliary pile tube (6), and a lifting device (2) is connected to an outer edge (5) of the upper end of the auxiliary pile tube (6); the outer diameter of the auxiliary pile tube (6) is consistent with the outer diameter of the upper end of the pointed cone pile head (7).

7. The auxiliary device for reinforcing a pile foundation structure with a divergent root system according to claim 6, characterized in that: In the state before being driven into the soft soil: the auxiliary pile barrel (6) is sleeved outside the metal pile body frame (4), and the lower end of the auxiliary pile barrel (6) is in coaxial limiting contact with the upper end of the pointed cone pile head (7); the auxiliary pile barrel (6) and the pointed cone pile head (7) are spliced ​​into a pointed column structure (61) with the pointed head facing downward; the upper side of each flat blade head (8) is provided with a contour edge (16), and the contour edge (16) is adapted to the inner contour of the lower end of the auxiliary pile barrel (6); when the auxiliary pile barrel (6) and the pointed cone pile head (7) are in the coaxial splicing state, the inner contour of the lower end of the auxiliary pile barrel (6) presses against the contour edge (16) on the upper side of each flat blade head (8), thereby preventing the root arm (9) from swinging upward at this time.

8. The auxiliary piling process of the auxiliary device for reinforcing pile foundation structure with divergent root system according to claim 7, characterized in that: The steps include: Step 1: The pointed column structure (61) formed by splicing the auxiliary pile tube (6) and the pointed cone pile head (7) with the pointed head facing downward is inserted downward into the soft soil layer (3) as a whole to a certain depth; Step 2, independently pulling out the auxiliary pile tube (6) from the soft soil layer (3) and transferring it upward; Step 3: Apply downward force to the metal pile skeleton (4) so ​​that the pointed cone pile head (7) continues to move downward, causing the root arms (9) that were originally in a drooping state to swing upward relatively to be distributed in a divergent manner and to be obliquely and horizontally embedded in the soft soil layer (3), thereby forming a "root structure" of the metal pile skeleton (4); Step 4: pouring concrete into the pouring bin (10).

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