WO2021196451A1

WO2021196451A1 - Deep cable-anchored pile supporting system and construction method therefor

Info

Publication number: WO2021196451A1
Application number: PCT/CN2020/102446
Authority: WO
Inventors: 刘飞; 刘小波; 王涛; 李仁民; 王建兰
Original assignee: 江苏东合南岩土科技股份有限公司
Priority date: 2020-03-31
Filing date: 2020-07-16
Publication date: 2021-10-07
Also published as: CN111335327A; CN111335327B

Abstract

Disclosed is a deep cable-anchored pile supporting system, comprising an anchor cable pile, and an anchor pile, which is arranged on a side of the anchor cable pile that is away from a foundation pit, wherein a first anchor cable A and a second anchor cable A are provided between the anchor cable pile and the anchor pile; an inner-row anchor cable enclosure A is provided on the inner side of the anchor cable pile; an outer-row anchor cable enclosure is provided on the outer side of the top of the anchor pile; one end of the first anchor cable A penetrates the anchor cable pile and is then connected to the inner-row anchor cable enclosure A, and the other end of the first anchor cable A extends upwards in an inclined direction, penetrates the anchor pile and is then connected to the outer-row anchor cable enclosure; and one end of the second anchor cable A penetrates the anchor cable pile and is then connected to the inner-row anchor cable enclosure A, and the other end of the second anchor cable A extends downwards in an inclined direction and is connected to the anchor pile. A construction method for the deep cable-anchored pile supporting system is further disclosed. The present application can be carried out in a limited construction range, and improves the construction efficiency.

Description

Deep anchored pile supporting system and construction method thereof

Technical field

The invention relates to a deep anchor pile supporting system and a construction method thereof.

Background technique

With the rapid development of the country's new urbanization construction, foundation pit engineering has become an important part of construction engineering, municipal engineering and rail transit engineering. Due to the increasing density of buildings in the city, traffic congestion, narrow sites, and poor geological conditions, it is very common for deep foundation pits to be adjacent to existing buildings, which limits the choice of deep foundation pit support types. The supporting structure of pile plus internal support and the supporting structure of pile wall plus internal support can effectively control deformation, but it is inconvenient to excavate soil, high cost and long construction period. Supporting structures such as piles and anchors are convenient for excavation, low cost, and convenient for construction. However, because of the restrictions on the red lines of anchors in many places, they are not allowed to be used.

Ground horizontal anchor pile refers to the construction of anchor piles in the soil stability area at a certain distance from the outside of the foundation pit. Crown-beam connection, the other end is connected with the crown-beam on the anchor pile, a certain prestress is applied to the tie rod through the connecting fastener, and a part of the earth pressure of the soil in the upper part of the foundation pit acting on the supporting pile is transmitted to the anchor pile A type of supporting structure. It has the advantages of low cost, simple operation, flexible use, and less construction clearance. However, because horizontal anchor piles can only be set on shallow foundations, and only one layer can be set, the horizontal pulling force provided by the anchor piles is not large, which will cause greater deformation.

Summary of the invention

To solve the above problems, the present invention first proposes a deep anchor pile support system, which includes a plurality of inner row piles arranged along a first set direction, at least one of the inner row piles is formed as an anchor pile, corresponding to Each anchor pile is provided with an anchor pile, and the anchor pile is arranged on the side of the corresponding anchor pile away from the foundation pit;

A group of anchor cables A is arranged between each anchor pile and the corresponding anchor pile. Each group of anchor cables A includes a first anchor cable A and a second anchor cable A. The first anchor cable A and the second anchor cable A are both pre-stressed anchor cables; the two ends of each first anchor cable A are called the first front end A and the first rear end A respectively, and the two ends of each second anchor cable A are called respectively Is the second front end A and the second rear end A;

An inner row of anchor rope purlins A is provided on the inner side of the inner row of piles; an outer row of anchor rope purlins is provided on the outer side of the top of the anchor piles;

The first front end A of the first anchor cable A passes through the corresponding anchor cable pile and is connected to the inner row of anchor cable purlins A, and the first rear end A of the first anchor cable A extends upward in the oblique direction and passes through the The corresponding anchor piles are then connected to the outer row of anchor rope purlins;

The second front end A of the second anchor cable A passes through the corresponding anchor cable pile and then is connected to the inner row of anchor cable purlins A, and the second rear end A of the second anchor cable A extends downward in the oblique direction and is connected To the corresponding anchor pile.

Including the anchor piles, there is no connecting beam between the inner row of piles and the anchor piles.

In this application, the anchor piles are arranged in the vertical direction or in the inclined direction. When the anchor piles are arranged in the inclined direction, the anchor piles are inclined from bottom to top toward the side away from the foundation pit, or from bottom to top toward the inner direction of the foundation pit. The angle between the anchor pile and the vertical is 5-30°.

In the deep anchor pile support system, a first anchor cable A and a second anchor cable A are provided. Compared with the anchor cable pile, the first anchor cable A and the second anchor cable A are respectively upward and downward in the inclined direction. Extend downward to form two-way tension on the anchor pile. While generating a horizontal pulling force toward the outside of the foundation pit, it can also produce upward and downward pulling forces on the anchor pile. The horizontal pulling force can produce resistance to the anchor cable pile towards the outside. Under the conduction of the inner row of anchor rope purlin A, the resistance can be transmitted to other inner rows that are not connected with anchor cables, so that all the inner rows are The rows of piles form a pulling force towards the external force. The upward and downward pulling forces will be at least partially cancelled. Compared with simply adopting a unilateral anchor cable inclined upward to the outside, the two-way stretching in this application will at least reduce the upward lifting force on the anchor cable pile, so that the anchor cable pile It can be held in the soil more stably, and because it reduces the upward lifting force of the anchor piles, the depth of the anchor piles and all the inner rows of piles below the bottom of the foundation pit can be reduced, thereby reducing the anchor piles and all the inner rows. The length of the piles reduces the construction cost, and because the length of the inner row of piles is reduced, the sinking time of the inner row of piles can also be reduced, and the construction efficiency is improved.

Since both ends of the first anchor cable A and the second anchor cable A are fixed to the anchor pile force, the construction area can be reduced, especially when the foundation pit construction is carried out around the existing building, due to the limited construction scope, It is also impossible to construct the jet-grouted pile anchor cable on the side wall of the foundation pit, and only large-diameter filling piles can be used as the foundation pit support system around the foundation pit, which not only has high construction costs, but also has a long construction period. The deep anchor pile support system in the present application can effectively solve this problem, and can be constructed within a smaller red line range.

In this application, all the inner row of piles including the anchor piles and the anchor piles are not provided with contact beams, so the maintenance time of the contact beams can be cancelled. After the inner row of piles and the anchor piles are settled, that is The excavation of the foundation pit can be carried out without waiting for the solidification of the contact beam, which can provide construction efficiency. Due to the cancellation of the connecting beam, when the first anchor cable A and the second anchor cable A are tensioned, the anchor cable piles can be slightly deformed toward the outside of the foundation pit, and the soil around the foundation pit can be squeezed. Make the soil around the foundation pit more dense and solid, which is conducive to improving the safety of the foundation pit.

Further, the angle between the first anchor cable A and the horizontal plane is 15-30°, the angle between the first anchor cable A and the second anchor cable A is 50-120°, and the angle between the first anchor cable A and the horizontal plane is 50-120°. The angle between the first anchor cable A and the horizontal plane is smaller than the angle between the second anchor cable A and the horizontal plane.

This design can make the inner row of anchor rope purlin A close to the top of the inner row of piles to the greatest extent, reduce the unsupported distance of the upper part of the inner row of piles, and at the same time make the connection point of the second anchor rope A and the anchor pile more towards the anchor pile The bottom of the pile. In the case that the first anchor cable A and the second anchor cable A have the same tension, relative to the anchor cable pile, this design can make the second anchor cable A generate a downward force greater than the upward force generated by the first anchor cable A. The force is divided to form a downward pressure on the anchor pile.

Specifically, the inner row of anchor cable purlins A is formed by two rows of section steels, both of which extend in the horizontal direction and are arranged side by side at intervals in the vertical direction. The first front end A of the first anchor cable A and the second anchor The second front end A of the cable A passes through the vertical gap between the two rows of section steels and then is fixed on the inner row of anchor cable purlins A.

The structure of the inner row anchor rope purlin A can facilitate the insertion of the first anchor rope A and the second anchor rope A, avoiding the first anchor rope A and the second anchor rope A on the inner row anchor rope purlin A The hole A passes through can maintain the integrity of the inner row of anchor ropes surrounding purlin A.

Furthermore, at least one inner row of anchor rope purlins B is also arranged on the inner side of the inner row of piles, corresponding to each inner row of anchor rope purlins B, and a set of anchor piles is provided between each anchor pile and the corresponding anchor pile. Anchor B The two ends of the anchor cable B are called the first front end B and the first rear end B respectively, and the two ends of each second anchor cable B are called the second front end B and the second rear end B respectively;

The first front end B of the first anchor cable B penetrates the corresponding anchor cable pile and then is connected to the corresponding inner row of anchor cable purlins B, and the first rear end B of the first anchor cable B extends upward in the oblique direction And connect to the corresponding anchor pile;

The second front end B of the second anchor cable B penetrates the corresponding anchor cable pile and then is connected to the corresponding inner row anchor cable purlin B, and the second rear end B of the second anchor cable B is downward in the inclined direction Extend and connect to the corresponding anchor pile.

Depending on the depth of the foundation pit, one or more inner row anchor rope purlins B can be set. Corresponding to each inner row anchor rope purlin B, there are first anchor ropes B and second anchor ropes B. Because the first anchor rope B and the second anchor cable B extend upward and downward respectively, so that the first anchor cable B and the second anchor cable B partially offset the force produced by the anchor pile and the anchor pile in the vertical direction, reducing the impact on the anchor pile or the anchor pile. The upward lifting force of the anchor pile can keep the anchor pile or anchor pile stably in place.

Further, in order to ensure a stable downward pulling force on the anchor cable piles, the included angle between the first anchor cable B and the second anchor cable B in the same group of anchor cables B is 50-130°, and the first anchor cable The angle between B and the horizontal plane is 20-45°. Preferably, the included angle between the first anchor cable B and the horizontal plane in the same group of anchor cables B is smaller than the included angle between the second anchor cable B and the horizontal plane, so as to form a net downward force to press down the anchor cable pile.

There is also an inner row of anchor rope surrounding purlins C on the inner side of the inner row of piles, corresponding to the inner row of anchor rope surrounding purlins C of the road, and a second anchor cable is arranged between each anchor rope pile and the corresponding anchor pile. C, the two ends of each second anchor cable C are respectively called the second front end C and the second rear end C; the second anchor cable C is a prestressed anchor cable;

The second front end C of the second anchor cable C penetrates through the corresponding anchor cable pile and then is connected to the inner row of anchor cable purlins C, and the second rear end C of the second anchor cable C extends downward in the oblique direction and is connected To the corresponding anchor pile;

The inner row of anchor rope purlin C is located above the inner row of anchor rope purlin A.

Due to the inclined arrangement of the first anchor cable A, there is a certain distance between the position of the inner row of anchor cable purlin A and the ground, so that the top of the inner row of piles may bend into the foundation pit, in order to avoid the top of the inner row of piles Under the external pressure, it bends towards the inner side of the foundation pit, and an inner row of anchor rope enclosing purlin C is added above the inner row of anchor rope enclosing purlin A, and a corresponding second anchor rope C is set. The piles are connected to the anchor piles in an inclined direction. After ensuring stable support on the top of the inner row of piles, it also provides downward pressure for the anchor piles. Because the anchor piles remain in the soil as a whole, they The body has greater anti-floating ability, so after adding the inner row of anchor cable purlin C and the corresponding second anchor cable C, the friction between the anchor pile and the soil can be fully utilized, and the second anchor can pass through The cable C transfers the friction to the inner row of piles, while avoiding the outward bending of the top of the inner row of piles, it also exerts downward pressure on the anchor piles, so that the anchor piles can be stably maintained at the set position. .

Specifically, the inner row of piles is at least one of H steel piles, steel sheet piles, combined steel sheet piles, steel tube piles or precast concrete piles, and the anchor piles are H steel piles, steel sheet piles, combined steel sheet piles, and steel tube piles. Or at least one of precast concrete piles. The above-mentioned various types of piles can be used to better realize the application, so as to make full use of the existing various prefabricated piles.

Furthermore, in order to enable the anchor pile to generate sufficient friction with the underground soil and prevent the anchor pile from moving upward under the action of the anchor pile, the elevation of the bottom of the anchor pile is lower than the elevation of the bottom of the anchor pile.

When the elevation of the bottom of the anchor pile is lower than that of the anchor pile, since the elevation of the bottom of the anchor pile and the anchor pile is lower than the set elevation of the bottom of the foundation pit, the anchor pile can be obtained in the soil. The stable state provides sufficient pulling force for the anchor pile.

In this application, the net distance between the anchor pile and the corresponding anchor pile is 1-10 meters, more preferably 3-8 meters. It is possible to make the anchor pile and the anchor pile have a sufficient thickness of soil to ensure that the soil can form a stable pressure and binding force on the anchor pile, avoid the soil between the anchor pile and the anchor pile from being too thin, and Due to the slight deviation of the soil to the inner side of the foundation pit, the friction between the anchor pile and the soil is reduced. The net distance between the anchor pile and the corresponding anchor pile refers to the net distance between the anchor pile and the intersection of the anchor pile and the plane where the ground is located.

In order to make the above technical solution proceed smoothly, the present invention also provides a construction method of a deep anchored pile support system, which is used to construct the deep anchored pile support system in the above solution, which includes the following steps:

(1) Prepare the inner row of piles and anchor piles. The inner row of anchor holes is formed at the set position of the inner row of piles as the anchor pile, and the outer row of anchor holes is formed at the set position of the anchor pile;

(2) Pass the first anchor cable A and the second anchor cable A freely in the front row of anchor cable holes on the anchor piles, and then sink the inner row of piles into the ground. A part of the first anchor cable A and the first A part of the second anchor cable A sinks into the ground along with the anchor cable pile, and the first rear end A of the first anchor cable A faces outward and remains on the ground, and the second rear end A of the second anchor cable A faces outward and Keep on the ground

Fix the second rear end A of the second anchor cable A at the set position of the rear end of the anchor pile, and then sink the anchor pile into the ground;

(3) Excavate the foundation pit up to the construction elevation of the inner row of anchor cables and purlin A, and then install the inner row of anchor cables and purlin A;

After passing the second rear end A of the first anchor cable A freely through the corresponding outer row anchor cable holes on the anchor piles and the corresponding surrounding purlin anchor cable holes on the outer row anchor cable purlins, The anchor cable A is stretched to cause the first anchor cable A to generate internal stress and form a pre-stressed anchor cable; fix the first front end A of the first anchor cable A on the inner row of anchor cable purlins A, and fix the first The first rear end A of the anchor cable A is fixed on the outer row of anchor cable purlins;

Tension the second anchor cable A to generate internal stress on the second anchor cable A to form a pre-stressed anchor cable, and fix the second front end A of the second anchor cable A on the inner row of anchor cable purlins A;

The tensioning of the first anchor cable A and the second anchor cable A is performed synchronously or step by step;

(4) Excavate the foundation pit to the design elevation, construct the main structure of the basement, and simultaneously carry out the construction of the support structure; then remove the purlin and pull out the anchor pile. According to different geological conditions, remove the inner row of piles or keep the inner row of piles in place. When the local conditions are good, the inner row of piles can be partially or completely removed and recycled. When the geological conditions are not good, or the surrounding buildings are greatly affected, the inner row of piles can be kept in place.

In this construction method, the first anchor cable A and the second anchor cable A can be tensioned in the foundation pit, so that the first anchor cable A and the second anchor cable A form a pre-stressed anchor cable, especially the second anchor cable The cable A is formed as a pre-stressed anchor cable. In this implementation method, the two ends of the second anchor cable A are pre-arranged into the soil by using anchor cable piles and anchor piles, and then the second anchor cable A is stretched in the foundation pit to form a pre-stressed anchor cable. In the part of the soil where the anchor pile cannot be effectively used, in order to form an effective constraint on the inner row of piles, the soil around the foundation pit is often used in the form of mixing piles with the excavation of the foundation pit. To install the anchor cable and connect the anchor cable to the inner row. Although this method can effectively form an effective constraint on the inner row of piles, the construction period is long and the cost is high, especially after the mixing pile is solidified. Effective anchor cables limit the efficiency of foundation pit construction.

In this construction method, the concrete construction is canceled, and both the first anchor cable A and the second anchor cable A can be fixed on the anchor piles to provide a reaction force for the tension of the first anchor cable A and the second anchor cable A to ensure Formation of prestressed anchor cables. Due to the cancellation of the concrete construction, after the formation of the prestressed anchor cable, the foundation pit can be continuously excavated, which can effectively improve the excavation efficiency of the foundation pit.

Further, before the first anchor cable A and the second anchor cable A are stretched, a tension groove is first opened on the path through which the first anchor cable A and the second anchor cable A pass, so that the first anchor cable A and the second anchor cable A The second anchor cables A are all arranged in the tension groove.

When the first anchor cable A and the second anchor cable A are stretched, the first anchor cable A and the second anchor cable A need to cut the soil to reach the set position, and the tension is tight. Hard areas or large debris in the soil will hinder the cutting of the soil by the first anchor cable A and the second anchor cable A, and sometimes cause damage to the first anchor cable A and the second anchor cable A. destroy.

Before the first anchor cable A and the second anchor cable A are stretched, the tension slot is first opened, so that the first anchor cable A and the second anchor cable A can reach the set position through the tension slot smoothly, avoiding the above situation happened.

Compared with the prior art, the overall beneficial effects of this application are:

The anchor cable can be set in a deep layer with good soil quality to provide a relatively large anchor tension and effectively control the deformation of the supporting structure. By setting up and down anchor cables, the upper and lower component forces can be offset, which can reduce the risk of anchor piles floating up and supporting piles sinking.

The application of prestress is completed during the shallow excavation of the foundation pit, and it can be directly excavated to the end in the later stage, and the construction speed is fast; and the prestress of each layer of anchor cables can be adjusted during the construction process, and the deformation control effect is good. The environmental impact is small.

This application is suitable for a variety of stratum conditions, from soft soil to medium-hard stratum, gravel layer, various soft and hard weathered rock layers, etc. can be used.

This application occupies less land, no internal support, pre-stressed anchor cables do not require grouting, fast construction, can effectively limit lateral deformation, supporting structures including inner row piles, anchor piles and anchor cables can be recycled and are economical Advantages such as significant benefits.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of Embodiment 1 of the present invention.

Fig. 2 is a plan view of Fig. 1.

Fig. 3 is a schematic diagram of the structure of Embodiment 2 of the present invention.

Fig. 4 is a top view of Fig. 3.

Fig. 5 is a schematic structural diagram of Embodiment 3 of the present invention.

Fig. 6 is a plan view of Fig. 5.

Fig. 7 is a schematic diagram of a first anchor pile with an anchor cable installed.

Figure 8 is a schematic diagram of the first anchor pile after the completion of sinking.

Fig. 9 is a schematic diagram of the sinking process of the first anchor pile with the anchor cable installed.

Figure 10 is a schematic diagram of connecting the anchor rope to the first outer row of anchor rope purlins.

Figure 11 is a schematic diagram after the anchor cable is tensioned.

Figure 12 is a schematic diagram after the excavation of the foundation pit is completed.

Figure 13 is a schematic view of the opening of the first anchor pile.

Fig. 14 is a schematic diagram of the first anchor cable pile with an anchor cable passing through it.

FIG. 15 is a schematic diagram of the structure of Embodiment 4 of the present invention.

Fig. 16 is a cross-sectional view taken along the line D-D in Fig. 15.

FIG. 17 is a schematic diagram of the structure of Embodiment 5 of the present invention.

Detailed ways

In this application, the direction toward the center of the foundation pit is called the inner side, and the direction opposite to the inner side is called the outer side.

Example 1

Please refer to Figures 1 and 2, the first deep anchor pile support system, which includes a plurality of first inner row piles 11 arranged along a first set direction, part of the first inner row piles are formed as first anchor cables The pile 111 is provided with a first anchor pile 121 corresponding to each first anchor pile 111, and the first anchor pile 121 is arranged on the side of the corresponding first anchor pile 111 away from the first foundation pit 130.

On the inner side of the first inner row of piles 11 is provided a first inner row of anchor rope purlins A14, and on the outer side of the top of the first anchor pile 121 is provided a first outer row of anchor rope purlins 13, the first outer row The anchor rope enclosing purlin 13 is pressed against each first anchor pile.

In this embodiment, the first outer row of anchor rope purlin 13 is arranged on the ground 110. In FIG. 2, the direction of the arrow 810 indicates the extending direction of the first set direction in Embodiment 1. The mark 120 indicates the bottom of the first foundation pit 130.

The elevation of the bottom of the first anchor pile 121 is lower than the elevation of the bottom of the first inner row of piles 11, that is, the elevation of the bottom of the first anchor pile 121 is lower than the elevation of the bottom of the first anchor pile 111. And the first clear distance S1 between the first anchor pile 121 and the corresponding first anchor pile 111 is 5 meters.

A group of anchor cables AI is arranged between each first anchor cable pile 111 and the corresponding first anchor pile, and each group of anchor cables AI includes a first anchor cable AI15 and a second anchor cable AI16, The first anchor cable AI15 and the second anchor cable AI16 are both pre-stressed anchor cables. The two ends of each first anchor cable AI15 are called the first front end A and the first rear end A, respectively, and the two ends of each second anchor cable AI16 are called the second front end A and the second rear end A, respectively.

The first front end A of the first anchor cable AI15 penetrates the corresponding first anchor cable pile 111 and then is connected to the first inner row of anchor cable purlins A14, and the first rear end A of the first anchor cable AI15 is along the oblique direction It extends upward and penetrates the corresponding first anchor pile 121 and then connects to the first outer row of anchor rope purlin 13.

The second front end A of the second anchor cable AI16 penetrates the corresponding first anchor cable pile 111 and then is connected to the first inner row of anchor cable purlins A14, and the second rear end A of the second anchor cable AI16 is along the oblique direction It extends downward and is connected to the corresponding first anchor pile 121.

The included angle α1 between the first anchor cable AI15 and the horizontal plane is 15°; the included angle β1 between the first anchor cable AI15 and the second anchor cable AI16 is 60°.

In this embodiment, the first inner row of piles 11 including the first anchor piles adopts first H steel piles, each of the first H steel piles are arranged at intervals along the first set direction, and the webs of the first H steel piles The plate extends in a direction perpendicular to the first set direction. The first anchor pile 121 adopts second H steel piles, each second H steel pile is arranged at intervals along a first set direction, and the webs of the second H steel piles extend in a direction parallel to the first set direction.

In this embodiment, the first inner row of anchor rope purlin A14 is formed by two rows of I-beams 141. Both rows of I-beams 141 extend in the horizontal direction and are arranged side by side at intervals in the vertical direction. The first front end A of the AI 15 and the second front end A of the second anchor A I 16 both pass through the vertical gap between the two rows of section steels and are fixed on the first inner row of anchor cable purlins A14. The structure of the first inner row of anchor rope enclosure A14 in this embodiment is also called a double-splice I-steel structure.

The outer purlin 13 of the first outer row of anchor cables is made of H-shaped steel.

In this embodiment, the connections of the first anchor cable AI15 and the second anchor cable AI16 with the first inner row anchor cable purlin A14, the first outer row anchor cable purlin 13 and the first anchor pile 121 all use steel cable anchors. To connect. Existing steel tapered anchors, including clip-type anchors of JM type, XM type, QM type, BM type, etc., and various types of steel cable anchors can meet the needs of this application, and will not be repeated. Specifically, in this embodiment, the cable anchor adopts a BM clip-type anchor.

The connection between the cable anchor and each anchor cable will be described below. The first front end A of the first anchor cable AI15 and the second front end A of the second anchor cable AI16 are two rows of workers passing through the inner row of anchor cables A14. After the gap between the beams 141, a cable anchor is installed, and the cable anchor is supported on the two rows of I-beams 141.

The first rear end A of the first anchor cable AⅠ15 penetrates the flange of the H-shaped steel as the first outer row of anchor cable purlin 13 and then installs the cable anchor, and supports the cable anchor on the flange of the H-shaped steel. .

The second rear end A of the second anchor cable AI16 penetrates the web of the H-shaped steel as the first anchor pile 121 and then installs the cable anchor, and supports the anchor on the web of the H-shaped steel.

In this embodiment, the first inner row of piles 11 and the first anchor piles 121 both sink into the ground in the vertical direction.

The construction of the first deep anchor pile supporting system in the first embodiment will be described below.

The construction method of the first deep anchor pile support system includes the following steps:

(1) Prepare the first inner row of piles 11 and the first anchor pile 121. The first inner row is formed at the setting position of the first inner row of piles as the first anchor pile 111. The first outer row of anchor holes and the second outer row of anchor holes are formed at fixed positions. The first outer row of anchor holes is used for piercing the first anchor cable AI, and the second outer row of anchor holes is used for piercing The second anchor cable AI. The first outer row of anchor cable holes and the second outer row of anchor cable holes are not shown in the drawings.

Referring to FIG. 13, a first hole 115 is opened at the first set position of the first anchor pile 111, and a second hole 116 is opened at the second set position. In this embodiment, the first inner row of piles 11 is made of H steel For the pile, a first hole 115 is opened on the same side of each flange 112 relative to the web 113, and a second hole 116 is opened on the other side of each flange 112 relative to the web 113, The first hole 115 is used for piercing the first anchor cable AI15, and the second hole 116 is for piercing the second anchor cable AI16.

It can be understood that, in other embodiments, the first hole and the second hole may be combined into a common hole, so that the first anchor cable AI and the second anchor cable AI pass through the common hole.

(2) Referring to FIGS. 7 and 14, the first anchor cable AI is freely inserted into the two first holes 115, and the second anchor cable AI is freely inserted into the two second holes 116. Referring to Figure 8, the first anchor pile 111 carrying the first anchor cable AI and the second anchor cable AI and other first inner row piles are sunk into the ground, and the first rear end A of the first anchor cable AI Facing the outside and being held on the ground 110, and making the second rear end A of the second anchor cable AI face the outside and being held on the ground 110.

Please refer to Figure 8, after passing the second rear end A of the second anchor cable AI through the second outer row of anchor cable holes, fix the steel cable anchor on the second rear end A of the second anchor cable AI, and be able to The steel cable anchor is supported on the web of the first anchor pile 121 to prevent the second rear end A of the second anchor cable AI from coming out of the second outer row of anchor cable holes, and then the first anchor pile is sunk into the ground.

It can be understood that, in other embodiments, the second outer row of anchor cable holes can be eliminated, and the second rear end A of the second anchor cable AI can be tied to the set position of the first anchor pile. Of course, other methods can also be used to fix the second rear end A of the second anchor cable AI at the set position of the first anchor pile.

(3) After the sinking of the first inner row of piles 11 and the first anchor pile 111 is completed, referring to Figure 10, install the first outer row of anchor rope purlin 13 on the ground. The flange of the first outer row of anchor rope purlins is provided with outer row purlin holes, and the outer row purlin holes are not shown in the drawings.

After passing the first rear end of the first anchor cable AI through the outer purlin hole, fix the steel cable anchor on the second rear end A of the first anchor cable AI, and enable the steel cable anchor to be supported on the second rear end A. On the flange of an outer row of anchor ropes surrounding purlins, prevent the first rear end A of the first anchor cable AⅠ from coming out of the outer row of surrounding purlin holes.

In this embodiment, the purpose of providing the outer purlin holes on the first outer row of anchor rope purlins is for the subsequent tensioning process to be able to stretch the first anchor rope AI on the ground. It is understandable that the other In the embodiment, if it is not necessary to stretch the first anchor cable AI on the ground, the outer row of purlin holes can be eliminated, and the first anchor cable AI can be directly fixed on the first outer row of anchor cable purlins.

Please refer to Figure 11, excavate the first foundation pit until the construction elevation of the first inner row of anchor rope purlin A, suspend the excavation of the first foundation pit, and then install the first inner row of anchor rope purlin A.

After completing the installation of the first inner row of anchor rope purlin A, the first front end A of the first anchor rope AⅠ is stretched by a jack in the foundation pit, so that the first anchor rope AⅠ generates internal stress and forms a prestressed anchor rope , And then lock the steel cable anchor on the first front end A of the first anchor cable AI, and support the steel cable anchor on the first inner row of anchor cable purlin A.

Then use the jack to stretch the second front end A of the second anchor cable AⅠ, so that the second anchor cable AⅠ generates internal stress, forming a pre-stressed anchor cable, and then lock the steel cable anchor to the second anchor cable AⅠ On the second front end A of the A, and the steel cable anchor is supported on the first inner row of anchor cable purlin A.

In this embodiment, the first anchor cable AI and the second anchor cable AI are simultaneously tensioned.

Of course, in other embodiments, the first anchor cable AI and the second anchor cable AI can also be tensioned step by step.

It can be understood that, in other embodiments, when the first anchor cable AI is stretched, the steel cable anchor can also be locked on the first front end A of the first anchor cable AI first, and then the first anchor cable The first rear end A of AI is stretched.

Of course, it is not necessary to install the first outer row of anchor rope purlins immediately after the completion of the sinking of the first anchor pile, as long as the first outer row of anchor ropes is completed before the first anchor rope AⅠ is stretched. The purlin can be installed.

Please refer to Figure 12, after finishing the tensioning of the first anchor cable AI and the second anchor cable AI, continue to excavate the first foundation pit and complete it.

When tensioning the first anchor cable AⅠ and the second anchor cable AⅠ, the first anchor cable AⅠ and the second anchor cable AⅠ need to cut the soil to reach the set position and tensioned. Hard areas, or large debris in the soil, will hinder the cutting of the soil by the first anchor cable AⅠ and the second anchor cable AⅠ, and sometimes cause damage to the first anchor cable AⅠ and the second anchor cable AⅠ. destroy.

In order to avoid the occurrence of the above situation, in other embodiments, before the first anchor cable AI and the second anchor cable AI are stretched, the first anchor cable AI and the second anchor cable AI are first opened on the path. The slot is stretched so that the first anchor cable AI and the second anchor cable AI are arranged in the tension slot, and then the first anchor cable AI and the second anchor cable AI are stretched.

Example 2

Please refer to Figures 3 and 4, the second deep anchor pile support system, which includes a plurality of second inner row piles 21 arranged along a first set direction, part of the second inner row piles are formed as second anchor cables The pile 211 corresponds to each second anchor pile 211 provided with a second anchor pile 221, and the second anchor pile 221 is arranged on the side of the corresponding second anchor pile 211 away from the second foundation pit 150.

A second inner row of anchor rope purlin A242 is provided on the inner side of the second inner row of piles 21. A second outer row of anchor rope purlin 23 is provided on the outer side of the top of the second anchor pile 221. In this embodiment, the second outer row of anchor rope purlin 23 is arranged on the ground. In FIG. 4, the direction of the arrow 820 indicates the extending direction of the first set direction in the second embodiment.

The elevation of the bottom of the second anchor pile 221 is lower than the elevation of the bottom of the second inner row of piles 21, that is, the elevation of the bottom of the second anchor pile 221 is lower than the elevation of the bottom of the second anchor pile 211. And the second net distance S2 between the second anchor pile 221 and the corresponding second anchor pile 211 is 8 meters.

A set of anchor cables AII is provided between each second anchor cable pile 211 and the corresponding second anchor pile 221, and each group of anchor cables AII includes a first anchor cable AII25 and a second anchor cable AII26. . The first anchor cable AII25 and the second anchor cable AII26 are both pre-stressed anchor cables. The two ends of each first anchor cable AII25 are called the first front end A and the first rear end A, respectively, and the two ends of each second anchor cable AII26 are called the second front end A and the second rear end A respectively;

The first front end A of the first anchor cable AII25 penetrates the corresponding second anchor cable pile 211 and then is connected to the second inner row of anchor cable purlins A242. The first rear end A of the first anchor cable AII25 is along the oblique direction It extends upward and penetrates through the second anchor pile 221 and then is connected to the second outer row of anchor rope purlin 23.

The second front end A of the second anchor cable AII26 penetrates the corresponding second anchor cable pile 211 and then is connected to the second inner row of anchor cable purlins A242, and the second rear end A of the second anchor cable AII26 is along the oblique direction It extends downward and is connected to the second anchor pile 221.

The included angle α2 between the first anchor cable AII25 and the horizontal plane is 30°; the included angle β2 between the first anchor cable AII25 and the second anchor cable AII26 is 70°.

In this embodiment, the second inner row of piles 21 adopts Larsen steel sheet piles. The Larsen steel sheet piles are arranged along the first set direction and interlock with each other. The webs of the Larsen steel sheet piles are along the direction of the first set direction. extend. The second anchor pile 221 adopts steel pipe piles, and the steel pipe piles are arranged at intervals along the first set direction.

In this embodiment, the second inner row anchor rope purlin A24 is formed by two rows of H-shaped steel, and the specific structure is similar to the first inner row anchor rope purlin A14 in Embodiment 1, and will not be repeated.

The second outer row of anchor rope enclosing purlin 23 is made of H-shaped steel.

In this embodiment, the connections of the first anchor cable AII25 and the second anchor cable AII26 with the second inner row anchor cable purlin A242, the second outer row anchor cable purlin 23, and the second anchor pile 221 all use steel cable anchors. The connection methods are similar to those in Embodiment 1, and will not be repeated here.

In this embodiment, an inner row of anchor rope enclosing purlin C241 is added, corresponding to the inner row of anchor rope enclosing purlin C, a second anchor pile is provided between each second anchor pile and the corresponding second anchor pile. Two anchor cables C27, the two ends of each second anchor cable C are respectively called the second front end C and the second rear end C. The inner row of anchor rope purlins C241 is located above the second inner row of anchor rope purlins A242 and is located inside the top of the second inner row of piles 21. The structure of the inner row of anchor rope enclosure purlin C241 is the same as the structure of the second inner row of anchor rope enclosure purlin A242, and will not be repeated.

The second front end C of the second anchor cable C penetrates through the corresponding second anchor cable pile and then is connected to the inner row of anchor cable purlins C241, and the second rear end C of the second anchor cable C extends downward in the oblique direction And connected to the second anchor pile 221. The connection method of the second anchor cable C and the inner row anchor cable purlin C241 is the same as the connection method of the second anchor cable AⅠ16 and the first inner row anchor cable purlin A14, and the connection of the second anchor cable C to the second anchor pile 221 The method is the same as that of the second anchor cable AI16 and the first anchor pile 121.

In this embodiment, only one inner row anchor cable enclosure C241 and the corresponding second anchor cable C27 are provided. It can be understood that in other embodiments, more than two inner row anchor cable enclosure purlins C241 and Corresponding second anchor cable C27.

In this embodiment, the second inner row of piles and the second anchor piles are both sunk into the ground in the vertical direction.

The construction method of the second deep anchor pile support system includes the following steps:

(1) Prepare the second inner row of piles and the second anchor piles. The second inner row of piles as the second anchor piles is formed at the setting position for the second anchor cable C27, the first anchor cable AII25 and The inner anchor cable hole of the second anchor cable AⅡ26 is formed on the second anchor pile with outer anchor cable holes for piercing the second anchor cable C27, the first anchor cable AⅡ25 and the second anchor cable AⅡ26.

(2) Put the second anchor cable C27, the first anchor cable AⅡ25 and the second anchor cable AⅡ26 into the corresponding inner anchor cable holes freely, and then lower the second anchor cable pile and other second inner row piles Sink to the ground. Pass the second anchor cable C27 and the second anchor cable AII26 into the corresponding outer anchor cable holes, respectively, and at the second rear end C of the second anchor cable C27 and the second anchor cable AII26 respectively Install steel cable anchors on A to prevent the second anchor cable C and the second anchor cable A from coming out of the outer anchor cable hole. The second anchor pile is sunk into the ground, and the second outer row of anchor rope purlins is installed.

(3) Excavate the second foundation pit until the construction elevation of the inner row of anchor cables C, suspend the excavation of the second foundation pit, install the inner row of anchor cables C, and stretch the second anchor cable C. A steel cable anchor is used to fix the second front end C of the second anchor cable C on the inner row anchor cable enclosure C.

The second anchor cable C27 is connected to the second anchor pile and the second anchor pile in the same manner as the second anchor cable AI is connected to the first anchor pile and the first anchor pile.

Continue to excavate the second foundation pit until the construction elevation of the second outer row of anchor rope purlin 23, suspend the excavation of the second foundation pit, install the second outer row of anchor rope purlin 23, and connect the first anchor rope AⅡ25 and Tension and fixation of the second anchor cable AⅡ26.

The tension and fixation of the first anchor cable AII25 and the second anchor cable AII26 are the same as the tension and fixation of the first anchor cable AⅠ and the second anchor cable AⅠ, and will not be repeated.

Continue earth excavation to the set depth of the second foundation pit.

Example 3

This embodiment is an improvement on the basis of Embodiment 2. Compared with Embodiment 2, this embodiment adds an inner row of anchor rope purlin B, and correspondingly adds a first anchor rope B and a second anchor rope B. This embodiment will be described below.

Please refer to Figures 5 and 6, the third deep anchor pile support system, which includes a plurality of third inner row piles 31 arranged along a first set direction, part of the third inner row piles are formed as third anchor cables The pile 311 is provided with a third anchor pile 321 corresponding to each third anchor pile 311, and the third anchor pile 321 is arranged on the side of the corresponding third anchor pile 311 away from the third foundation pit 160.

A third inner row of anchor rope purlin A342 is provided on the inner side of the third inner row of piles 31. A third outer row of anchor rope purlin 33 is provided outside the top of the third anchor pile 321. In this embodiment, the third outer row of anchor rope purlin 33 is arranged on the ground. The direction of the arrow 830 in FIG. 6 indicates the extending direction of the first set direction in the third embodiment.

The elevation of the bottom of the third anchor pile 321 is lower than the elevation of the bottom of the third inner row of piles 31, that is, the elevation of the bottom of the third anchor pile 321 is lower than the elevation of the bottom of the third anchor pile 311. And the third clear distance S3 between the third anchor pile 321 and the corresponding third anchor pile 311 is 10 meters.

A group of anchor cables AⅢ is arranged between each third anchor pile 311 and the corresponding third anchor pile 321, and each group of anchor cables AⅢ includes a first anchor cable AⅢ35 and a second anchor cable AⅢ36 .

The third inner row of anchor rope purlins A342 has the same structure as the second inner row of anchor rope purlins A242 in the second embodiment. The installation method of the first anchor cable AIII35 and the second anchor cable AIII36 is the same as the installation method of the first anchor cable AII25 and the second anchor cable AII26 in Embodiment 2, and will not be repeated.

In this embodiment, the angle α3 between the first anchor cable AIII35 and the horizontal plane is 20°; the angle β3 between the first anchor cable AIII35 and the second anchor cable AIII36 is 80°.

In this embodiment, the third inner row of piles 31 is a combined steel sheet pile, and the combined steel sheet pile is composed of a U-shaped steel sheet pile 315 and an H steel pile 316. The third anchor pile 321 is an H steel pile.

The installation methods of the inner row anchor rope purlin CIII341 and the second anchor cable CIII37 are the same as the installation methods of the inner row anchor rope purlin C241 and the second anchor cable C27 in the second embodiment. The inner row of anchor rope purlin CIII341 is located above the third inner row of anchor rope purlin A342, and is located inside the top of the third inner row of piles 31.

In this embodiment, an inner row of anchor rope purlin B343 is added. The inner row of anchor rope purlin B343 is located below the third inner row of anchor rope purlin A342 and is installed inside the third inner row of piles 31.

Corresponding to the inner row of anchor rope purlins B343, a group of anchor ropes B is arranged between each third anchor pile 311 and the corresponding third anchor pile 321, and each group of anchor ropes B includes a first Anchor rope B38 and a second anchor rope B39. Both the first anchor cable B and the second anchor cable B are pre-stressed anchor cables. The two ends of each first anchor cable B38 are called the first front end B and the first rear end B, respectively. The two ends of each second anchor cable B39 are called a second front end B and a second rear end B, respectively.

The first front end B of the first anchor cable B penetrates through the third anchor cable pile 311 and then is connected to the inner row of anchor cable purlins B. The first rear end B of the first anchor cable B extends upward in the oblique direction and is connected to On the third anchor pile 321.

The second front end B of the second anchor cable B penetrates the third anchor cable pile 311 and then is connected to the inner row of anchor cable purlins B, and the second rear end B of the second anchor cable B extends downward in the oblique direction and is connected To the third anchor pile 321.

The structure of the inner row of anchor rope purlin B343 is the same as that of the third inner row of anchor rope purlin A342. The connection mode of the first anchor cable B38 and the second anchor cable B39 with the inner row anchor cable purlin B343 is the same as the connection method of the first anchor cable AIII35 and the second anchor cable AIII36 with the third inner row anchor cable purlin A342.

The first front end of the first anchor cable B38 penetrates the corresponding third anchor cable pile and is connected to the inner row of anchor cable purlins B343. The first rear end of the first anchor cable B38 extends upward in the inclined direction and is connected to the corresponding On the third anchor pile 321.

The second front end of the second anchor cable B39 penetrates through the corresponding third anchor cable pile and is connected to the inner row of anchor cable purlins B343. The second rear end of the second anchor cable B39 extends downward in the oblique direction and is connected to the Corresponding to the third anchor pile 321.

In this embodiment, the angle between the first anchor cable B and the second anchor cable B in the same group of anchor cables B is 75°, and the angle between the first anchor cable B and the horizontal plane is 30°. It can be understood that in other embodiments, the angle between the first anchor cable B and the second anchor cable B in the same group of anchor cables B and the angle between the first anchor cable B and the horizontal plane can be respectively 50° and 20°, 80° and 30°, 100° and 40°, and 130° and 45°.

It can be understood that in other embodiments, the inner row of piles may also be at least one of steel pipe piles or precast concrete piles, and the anchor piles may also be at least one of steel sheet piles, combined steel sheet piles or precast concrete piles.

It can be understood that in other embodiments, the inner row anchor cable enclosure purlin CIII341 and the corresponding second anchor cable CIII37 in this embodiment 3 can be eliminated, and only the third inner row anchor cable enclosure purlin A342 and the inner row anchor cable enclosure are retained. Purlin B343 and corresponding first anchor cable AIII35, second anchor cable AIII36, first anchor cable B38 and second anchor cable B39.

In this embodiment, the third inner row of piles and the third anchor pile are both sunk into the ground in the vertical direction.

The construction method of the third deep anchor pile support system includes the following steps:

(1) Prepare the third inner row of piles and the third anchor pile, and form the third inner row of piles as the third anchor pile at the setting position for piercing the second anchor cable CⅢ37, the first anchor cable AⅢ35, The inner anchor cable holes of the second anchor cable AⅢ36, the first anchor cable B38 and the second anchor cable B39 are formed on the third anchor pile for piercing the second anchor cable CⅢ37, the first anchor cable AⅢ35, and the second anchor cable AⅢ36, the outer anchor cable hole of the first anchor cable B38 and the second anchor cable B39.

(2) Put the second anchor cable CⅢ37, the first anchor cable AⅢ35, the second anchor cable AⅢ36, the first anchor cable B38 and the second anchor cable B39 into the corresponding inner anchor cable holes freely, and then set the first anchor cable Three-anchor piles and other third inner-row piles sink to the ground. Pass the second anchor rope CⅢ37, the second anchor rope AⅢ36, the first anchor rope B38 and the second anchor rope B39 into the corresponding outer anchor rope holes respectively, and respectively in the second anchor rope CⅢ37 second rear end C, Install steel cable anchors on the second rear end A of the second anchor cable AⅢ36, the first rear end B of the first anchor cable B38, and the second rear end B of the second anchor cable B39 to prevent each anchor cable from falling out of the outer anchor Sokong. The third anchor pile is sunk into the ground, and the third outer row of anchor rope purlins is installed.

(3) Excavate the third foundation pit,

Follow the steps of excavating the second foundation pit to complete the installation of the inner row of anchor cables CⅢ and the second anchor cable CⅢ, and complete the installation of the third inner row of anchor cables A, the first anchor cable AⅢ and the second anchor cable AⅢ .

Continue to excavate the third foundation pit until the construction elevation of the inner row of anchor rope purlin B. Suspend the excavation of the third foundation pit, install the inner row of anchor rope surrounding purlin B, and fix the first anchor rope B and the second anchor rope B. Tension is performed, and the first anchor rope B and the second anchor rope B are fixed on the inner row of anchor rope purlins B with steel rope anchors.

Continue to excavate the third foundation pit and complete it.

Example 4

This embodiment is an improvement on the basis of embodiment 1. It is basically the same as embodiment 1. The difference is that the fourth anchor pile 421 is arranged obliquely. The angle θ between the pile 421 and the vertical direction is 10°. That is, the inclination angle of the fourth anchor pile 421 toward the outside of the foundation pit is 10°. It can be understood that in other embodiments, the inclination angle of the fourth anchor pile 421 toward the outside of the foundation pit may also be 5°, 15°, 20°, or 30°.

And the fourth clear distance S4 between the fourth anchor pile 421 and the corresponding fourth anchor pile 411 is 3 meters.

Fig. 16 is a cross-sectional view taken along the direction D-D in Fig. 15, where the cross-section D-D is located in the plane where the ground is located.

The same reference numerals in FIGS. 15 and 16 of this embodiment as in FIGS. 1 and 2 denote the same structural components.

The inclined setting of anchor piles is mainly used in areas with a small construction area. Of course, areas with a large construction area can also be used.

Example 5

This embodiment is an improvement on the basis of Embodiment 4. This embodiment is basically the same as Embodiment 4, and the difference lies in the inclination direction of the anchor pile.

Referring to FIG. 17, in this embodiment, the fifth anchor pile 521 is inclined from bottom to top toward one side of the inner direction of the foundation pit, and in this embodiment, in the vertical direction, the bottom of the fifth anchor pile 521 extends outward Out of the construction red line area, in Figure 17, the dashed line 500 represents the construction red line. When the pile top of the fifth anchor pile 521 is still located within the construction red line, after the foundation pit construction is completed, after the fifth anchor pile 521 is removed, the underground structure will not exceed the construction red line. This embodiment is suitable for situations where the edge of the foundation pit is narrower from the construction red line. In this embodiment, the distance between the fifth anchor pile 511 and the construction red line is 1.2 meters. After the bottom of the five-anchor pile extends out of the construction red line, while ensuring that the ground construction still meets the construction requirements, increase the amount of soil between the fifth anchor pile 511 and the fifth anchor pile 521 to improve the soil The cohesive force of the body on the fifth anchor pile 521 provides sufficient resistance to pulling out.

The same reference numerals in FIG. 17 and FIG. 15 of this embodiment denote the same structural components. The inclined setting of anchor piles is mainly used in areas with a small construction area. Of course, areas with a large construction area can also be used.

Claims

A deep anchor pile support system, which is characterized in that it comprises a plurality of inner row piles arranged along a first set direction, at least one of the inner row piles is formed as an anchor pile, which is set corresponding to each anchor pile There is an anchor pile, which is set on the side of the corresponding anchor pile away from the foundation pit;

A group of anchor cables A is arranged between each anchor pile and the corresponding anchor pile. Each group of anchor cables A includes a first anchor cable A and a second anchor cable A. The first anchor cable A and the second anchor cable A are both pre-stressed anchor cables; the two ends of each first anchor cable A are called the first front end A and the first rear end A respectively, and the two ends of each second anchor cable A are called respectively Is the second front end A and the second rear end A;

An inner row of anchor rope purlins A is provided on the inner side of the inner row of piles; an outer row of anchor rope purlins is provided on the outer side of the top of the anchor piles;

The first front end A of the first anchor cable A passes through the corresponding anchor cable pile and is connected to the inner row of anchor cable purlins A, and the first rear end A of the first anchor cable A extends upward in the oblique direction and passes through the The corresponding anchor piles are then connected to the outer row of anchor rope purlins;

The second front end A of the second anchor cable A passes through the corresponding anchor cable pile and then is connected to the inner row of anchor cable purlins A, and the second rear end A of the second anchor cable A extends downward in the oblique direction and is connected To the corresponding anchor pile.
The deep anchored pile supporting system according to claim 1, characterized in that:

The angle between the first anchor cable A and the horizontal plane is 15-30°, the angle between the first anchor cable A and the second anchor cable A is 50-120°, and the first anchor cable A in the same group The angle between the anchor cable A and the horizontal plane is smaller than the angle between the second anchor cable A and the horizontal plane.
The deep anchored pile supporting system according to claim 1, characterized in that:

The inner row of anchor rope purlins A is formed by two rows of section steels, both of which extend in the horizontal direction and are arranged side by side at intervals in the vertical direction. The first front end A of the first anchor cable A and the second anchor cable A The second front end A passes through the vertical gap between the two rows of section steels and is fixed on the inner row of anchor rope surrounding purlins A.
The deep anchored pile supporting system according to any one of claims 1-3, characterized in that:

At least one inner row of anchor rope purlins B is also arranged on the inner side of the inner row of piles, corresponding to each inner row of anchor rope purlins B, and a set of anchor ropes is arranged between each anchor pile and the corresponding anchor pile B. Each group of anchor cables B includes a first anchor cable B and a second anchor cable B. The first anchor cable B and the second anchor cable B are both pre-stressed anchor cables; each first anchor cable The two ends of B are respectively called the first front end B and the first rear end B, and the two ends of each second anchor cable B are called the second front end B and the second rear end B respectively;

The first front end B of the first anchor cable B penetrates the corresponding anchor cable pile and then is connected to the corresponding inner row of anchor cable purlins B, and the first rear end B of the first anchor cable B extends upward in the oblique direction And connect to the corresponding anchor pile;

The second front end B of the second anchor cable B penetrates the corresponding anchor cable pile and then is connected to the corresponding inner row anchor cable purlin B, and the second rear end B of the second anchor cable B is downward in the inclined direction Extend and connect to the corresponding anchor pile.
The deep anchored pile supporting system according to claim 4, characterized in that:

The angle between the first anchor cable B and the second anchor cable B in the same group of anchor cables B is 50-130°, and the angle between the first anchor cable B and the horizontal plane is 20-45°.
The deep anchored pile supporting system according to any one of claims 1-3, characterized in that:

There is also an inner row of anchor rope surrounding purlins C on the inner side of the inner row of piles, corresponding to the inner row of anchor rope surrounding purlins C of the road, and a second anchor cable is arranged between each anchor rope pile and the corresponding anchor pile. C, the two ends of each second anchor cable C are respectively called the second front end C and the second rear end C; the second anchor cable C is a prestressed anchor cable;

The second front end C of the second anchor cable C penetrates through the corresponding anchor cable pile and then is connected to the inner row of anchor cable purlins C, and the second rear end C of the second anchor cable C extends downward in the oblique direction and is connected To the corresponding anchor pile;

The inner row of anchor rope purlin C is located above the inner row of anchor rope purlin A.
The deep anchor pile support system according to claim 1, wherein the inner row of piles is at least one of H steel piles, steel sheet piles, composite steel sheet piles, steel pipe piles or precast concrete piles, and the anchor The pile is at least one of H steel pile, steel sheet pile, combined steel sheet pile, steel pipe pile or precast concrete pile.
The deep anchored pile supporting system according to claim 1, characterized in that:

The elevation of the bottom of the anchor pile is lower than the elevation of the bottom of the anchor pile.
A construction method of a deep anchored pile supporting system, which is used to construct the deep anchored pile supporting system of claim 1, characterized in that it comprises the following steps:

(1) Prepare the inner row of piles and anchor piles. The inner row of anchor holes is formed at the set position of the inner row of piles as the anchor pile, and the outer row of anchor holes is formed at the set position of the anchor pile;

(2) Pass the first anchor cable A and the second anchor cable A freely in the front row of anchor cable holes on the anchor piles, and then sink the inner row of piles into the ground. A part of the first anchor cable A and the first A part of the second anchor cable A sinks into the ground along with the anchor cable pile, and the first rear end A of the first anchor cable A faces outward and remains on the ground, and the second rear end A of the second anchor cable A faces outward and Keep on the ground

Fix the second rear end A of the second anchor cable A at the set position of the rear end of the anchor pile, and then sink the anchor pile into the ground;

(3) Excavate the foundation pit up to the construction elevation of the inner row of anchor cables and purlin A, and then install the inner row of anchor cables and purlin A;

After passing the second rear end A of the first anchor cable A freely through the corresponding outer row anchor cable holes on the anchor piles and the corresponding surrounding purlin anchor cable holes on the outer row anchor cable purlins, The anchor cable A is stretched to cause the first anchor cable A to generate internal stress and form a pre-stressed anchor cable; fix the first front end A of the first anchor cable A on the inner row of anchor cable purlins A, and fix the first The first rear end A of the anchor cable A is fixed on the outer row of anchor cable purlins;

Tension the second anchor cable A to generate internal stress on the second anchor cable A to form a pre-stressed anchor cable, and fix the second front end A of the second anchor cable A on the inner row of anchor cable purlins A;

The tensioning of the first anchor cable A and the second anchor cable A is performed synchronously or step by step;

(4) Excavate the foundation pit to the design elevation, construct the main structure of the basement, and simultaneously carry out the construction of the support structure; then remove the purlin and pull out the anchor pile.
The construction method according to claim 9, characterized in that, before the first anchor cable A and the second anchor cable A are stretched, the first anchor cable A and the second anchor cable A are to be traversed on the path A tension slot is opened so that both the first anchor cable A and the second anchor cable A are arranged in the tension slot.