一种深基坑基础托换施工系统

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By installing anti-settlement devices at the bottom of the cast-in-place piles and increasing the support area using plug-in support plates, the problem of cast-in-place pile settlement was solved, the foundation was stabilized and reinforced, and the construction requirements for foundation underpinning were met.

CN224514238UActive Publication Date: 2026-07-17DECORATION CO LTD OF CHINA CONSTR 3RD ENG BUREAU

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: DECORATION CO LTD OF CHINA CONSTR 3RD ENG BUREAU
Filing Date: 2025-08-15
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

In existing technologies, cast-in-place piles suffer from settlement problems during construction, which cannot meet the design depth and location requirements for foundation underpinning, resulting in ineffective foundation reinforcement.

Method used

The system employs steel strand anchor bolt assemblies, cast-in-place piles, capping beams, and anti-settlement devices. By installing anti-settlement devices at the bottom of the cast-in-place piles and increasing the support area using the interlocking first and second support plates, the pressure of the cast-in-place piles on the soil is reduced, thus avoiding or minimizing settlement.

Benefits of technology

This effectively reduced the settlement of the cast-in-place piles, enhanced the stability of the foundation, and ensured the successful implementation of the foundation underpinning construction.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN224514238U_ABST

Patent Text Reader

Abstract

本实用新型公开了一种深基坑基础托换施工系统，其包括：钢绞线锚杆组合件、灌注桩、冠梁和防沉降装置，钢绞线锚杆组合件包括一端相互连接的钢绞线和锚杆；灌注桩设置在保留建筑和基坑之间置；冠梁连接在多个灌注桩之间；防沉降装置包括第一支撑板、至少一个第二支撑板、第一插管和第二插管，第一插管固定在第一支撑板的底部，第二插管固定在第二支撑板的底部，第一插管和第二插管可通过插接方式连接，第一插管和第二插管上均设有锁定孔，通过插杆插入对应的锁定孔实现第一插管与第二插管的位置锁定。按照本申请上述结构的深基坑基础托换施工系统，通过防沉降装置增加与土体的受力面积可减少灌注桩对土体的压力，从而避免或减少灌注桩的沉降。

Need to check novelty before this filing date? Find Prior Art

Claims

1. A deep foundation underpinning construction system for reinforcing around a retained building (6) and foundation pit, characterised in that, include: A steel strand anchor assembly (3) includes a steel strand and an anchor connected at one end; the other end of the anchor is located on the periphery of the preserved building (6); A cast-in-place pile (1) is provided between the preserved building (6) and the foundation pit, and the cast-in-place pile (1) is provided close to the foundation pit; the end of the steel strand passes through the cast-in-place pile (1) and is locked by a locking device; A capping beam (8) is located at the top of the cast-in-place pile (1) and is connected between multiple cast-in-place piles (1); An anti-settlement device (9) is installed at the bottom of the cast-in-place pile (1). The anti-settlement device (9) includes a first support plate (91), at least one second support plate (92), a first insertion tube (93), and a second insertion tube (95). The first insertion tube (93) is fixed at the bottom of the first support plate (91), and the second insertion tube (95) is fixed at the bottom of the second support plate (92). The first insertion tube (93) and the second insertion tube (95) can be connected by a plug-in connection. Both the first insertion tube (93) and the second insertion tube (95) are provided with locking holes (94). The positions of the first insertion tube (93) and the second insertion tube (95) are locked by inserting the insertion rod into the corresponding locking hole (94).

2. The deep foundation underpinning construction system according to claim 1, wherein, There are two second support plates (92). The first support plate (91) is circular and the second support plate (92) is semi-circular. The inner diameter of the second support plate (92) is equal to the outer diameter of the first support plate (91).

3. The deep foundation underpinning construction system according to claim 1 or 2, wherein, It also includes a telescopic plate (96), the second support plate (92) is provided with a first strip hole (921), and the telescopic plate (96) is provided with a second strip hole (961) at the corresponding position. The telescopic plate (96) is locked in the predetermined position of the second support plate (92) by bolts (97).

4. The deep foundation underpinning construction system according to claim 1, wherein, The first insertion tube (93) has a square tube structure, and the second insertion tube (95) has a square tube structure. The second insertion tube (95) can be inserted into the first insertion tube (93).

5. The deep foundation underpinning construction system according to claim 1, wherein, The first insertion tube (93) is a round tube structure, and the second insertion tube (95) is a round tube structure. The second insertion tube (95) can be inserted into the first insertion tube (93).

6. The deep foundation underpinning construction system according to claim 1, wherein, The cast-in-place pile (1) is provided with a steel cage (11) inside. The steel cage (11) includes vertically arranged main bars (111), reinforcing hoops (112) are arranged at intervals inside the main bars (111), and spiral hoops (113) are arranged outside the main bars (111).

7. The deep foundation pit underpinning construction system according to claim 1, characterized in that, A double-I-beam (2) is provided on the side of the cast-in-place pile (1) away from the anchor rod. A through hole is provided on the double-I-beam (2). The end of the steel strand passing through the cast-in-place pile (1) passes through the through hole and is fixed by a locking device.